Dépouillements

Modeling and simulation of a hybrid photovoltaic module equipped with a heat-recovery system / Maffezzoni, Paolo in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4311 - 4318 Titre : Modeling and simulation of a hybrid photovoltaic module equipped with a heat-recovery system Type de document : texte imprimé Auteurs : Maffezzoni, Paolo, Auteur ; Codecasa, Lorenzo, Auteur ; D'Amore, Dario, Auteur Article en page(s) : pp. 4311 - 4318 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Macromodeling  Renewable  energy  Solar  cells  Thermal  effects Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a multiphysics model of a hybrid solar panel equipped with a solar concentrator and a cooling interface with heat-recovery capability. It is shown how the temperature profile along the cells can be predicted as a function of the cooling strategy. From this information, the I-V electrical characteristic of the whole module can be derived. An original compact electrothermal macromodel of the photovoltaic module is employed which allows one to properly incorporate the effect of temperature gradients along the cells. By exploiting this macromodel, accurate and efficient electrothermal simulations of the solar system can be carried out with a conventional electrical simulator, like Spice. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4838884 [article] Modeling and simulation of a hybrid photovoltaic module equipped with a heat-recovery system [texte imprimé] / Maffezzoni, Paolo, Auteur ; Codecasa, Lorenzo, Auteur ; D'Amore, Dario, Auteur . - pp. 4311 - 4318. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4311 - 4318 Mots-clés : Macromodeling  Renewable  energy  Solar  cells  Thermal  effects Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a multiphysics model of a hybrid solar panel equipped with a solar concentrator and a cooling interface with heat-recovery capability. It is shown how the temperature profile along the cells can be predicted as a function of the cooling strategy. From this information, the I-V electrical characteristic of the whole module can be derived. An original compact electrothermal macromodel of the photovoltaic module is employed which allows one to properly incorporate the effect of temperature gradients along the cells. By exploiting this macromodel, accurate and efficient electrothermal simulations of the solar system can be carried out with a conventional electrical simulator, like Spice. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4838884

Electrical PV array reconfiguration strategy for energy extraction improvement in grid-connected PV systems / Velasco-Quesada, Guillermo in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4319 - 4331 Titre : Electrical PV array reconfiguration strategy for energy extraction improvement in grid-connected PV systems Type de document : texte imprimé Auteurs : Velasco-Quesada, Guillermo, Auteur ; Guinjoan-Gispert, Francisco, Auteur ; Pique-Lopez, Robert, Auteur Article en page(s) : pp. 4319 - 4331 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Electrical  arrays  reconfiguration  (EAR)  Grid-connected  photovoltaic  (PV)  systems  Reconfigurable  PV  systems Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper applies a dynamical electrical array reconfiguration (EAR) strategy on the photovoltaic (PV) generator of a grid-connected PV system based on a plant-oriented configuration, in order to improve its energy production when the operating conditions of the solar panels are different. The EAR strategy is carried out by inserting a controllable switching matrix between the PV generator and the central inverter, which allows the electrical reconnection of the available PV modules. As a result, the PV system exhibits a self-capacity for real-time adaptation to the PV generator external operating conditions and improves the energy extraction of the system. Experimental results are provided to validate the proposed approach. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5173562 [article] Electrical PV array reconfiguration strategy for energy extraction improvement in grid-connected PV systems [texte imprimé] / Velasco-Quesada, Guillermo, Auteur ; Guinjoan-Gispert, Francisco, Auteur ; Pique-Lopez, Robert, Auteur . - pp. 4319 - 4331. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4319 - 4331 Mots-clés : Electrical  arrays  reconfiguration  (EAR)  Grid-connected  photovoltaic  (PV)  systems  Reconfigurable  PV  systems Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper applies a dynamical electrical array reconfiguration (EAR) strategy on the photovoltaic (PV) generator of a grid-connected PV system based on a plant-oriented configuration, in order to improve its energy production when the operating conditions of the solar panels are different. The EAR strategy is carried out by inserting a controllable switching matrix between the PV generator and the central inverter, which allows the electrical reconnection of the available PV modules. As a result, the PV system exhibits a self-capacity for real-time adaptation to the PV generator external operating conditions and improves the energy extraction of the system. Experimental results are provided to validate the proposed approach. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5173562

Organic architecture for small- to large-scale photovoltaic power stations / Rodriguez, Cuauhtemoc in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4332 - 4343 Titre : Organic architecture for small- to large-scale photovoltaic power stations Type de document : texte imprimé Auteurs : Rodriguez, Cuauhtemoc, Auteur ; Bishop, Justin D. K., Auteur Article en page(s) : pp. 4332 - 4343 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Photovoltaic  (PV)  power  systems  Power  generation  Reconfigurable  architectures Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Increased widespread deployment of power generation from photovoltaics is consistent with binding agreements to reduce carbon emissions and increase the penetration of electricity from renewables and political aspirations to increase security of energy supply. However, in order for these generation facilities to compete in increasingly open power markets, they must be low cost and provide high-quality and high-quantity outputs. The organic architecture suggested in this paper proposes a solution that provides these advantages, using modular-power-electronic and energy-storage components, to facilitate scalable plants, from kilowatt to megawatt size. Specifically, the inclusion of power-conversion building blocks (PCBBs), grid-interactive power units (GPUs), and power-system control units allow efficient transfer of power from the point of energy conversion to the point of common coupling. A specific example of a 24-kW plant illustrates that, through optimum switching of PCBBs, the GPU can transfer 95.46% of the daily available energy to the transmission grid. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5067313 [article] Organic architecture for small- to large-scale photovoltaic power stations [texte imprimé] / Rodriguez, Cuauhtemoc, Auteur ; Bishop, Justin D. K., Auteur . - pp. 4332 - 4343. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4332 - 4343 Mots-clés : Photovoltaic  (PV)  power  systems  Power  generation  Reconfigurable  architectures Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Increased widespread deployment of power generation from photovoltaics is consistent with binding agreements to reduce carbon emissions and increase the penetration of electricity from renewables and political aspirations to increase security of energy supply. However, in order for these generation facilities to compete in increasingly open power markets, they must be low cost and provide high-quality and high-quantity outputs. The organic architecture suggested in this paper proposes a solution that provides these advantages, using modular-power-electronic and energy-storage components, to facilitate scalable plants, from kilowatt to megawatt size. Specifically, the inclusion of power-conversion building blocks (PCBBs), grid-interactive power units (GPUs), and power-system control units allow efficient transfer of power from the point of energy conversion to the point of common coupling. A specific example of a 24-kW plant illustrates that, through optimum switching of PCBBs, the GPU can transfer 95.46% of the daily available energy to the transmission grid. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5067313

Modeling and control of PV charger system with SEPIC converter / Chiang, S. J. in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4344 - 4353 Titre : Modeling and control of PV charger system with SEPIC converter Type de document : texte imprimé Auteurs : Chiang, S. J., Auteur ; Shieh, Hsin-Jang, Auteur ; Chen, Ming-Chieh, Auteur Article en page(s) : pp. 4344 - 4353 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Maximum  power  point  tracking  (MPPT)  Power  balance  control  Single-ended  primary  inductance  converter  (SEPIC)  Stand-alone Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The photovoltaic (PV) stand-alone system requires a battery charger for energy storage. This paper presents the modeling and controller design of the PV charger system implemented with the single-ended primary inductance converter (SEPIC). The designed SEPIC employs the peak-current-mode control with the current command generated from the input PV voltage regulating loop, where the voltage command is determined by both the PV module maximum power point tracking (MPPT) control loop and the battery charging loop. The control objective is to balance the power flow from the PV module to the battery and the load such that the PV power is utilized effectively and the battery is charged with three charging stages. This paper gives a detailed modeling of the SEPIC with the PV module input and peak-current-mode control first. Accordingly, the PV voltage controller, as well as the adaptive MPPT controller, is designed. An 80-W prototype system is built. The effectiveness of the proposed methods is proved with some simulation and experimental results. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4631374 [article] Modeling and control of PV charger system with SEPIC converter [texte imprimé] / Chiang, S. J., Auteur ; Shieh, Hsin-Jang, Auteur ; Chen, Ming-Chieh, Auteur . - pp. 4344 - 4353. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4344 - 4353 Mots-clés : Maximum  power  point  tracking  (MPPT)  Power  balance  control  Single-ended  primary  inductance  converter  (SEPIC)  Stand-alone Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The photovoltaic (PV) stand-alone system requires a battery charger for energy storage. This paper presents the modeling and controller design of the PV charger system implemented with the single-ended primary inductance converter (SEPIC). The designed SEPIC employs the peak-current-mode control with the current command generated from the input PV voltage regulating loop, where the voltage command is determined by both the PV module maximum power point tracking (MPPT) control loop and the battery charging loop. The control objective is to balance the power flow from the PV module to the battery and the load such that the PV power is utilized effectively and the battery is charged with three charging stages. This paper gives a detailed modeling of the SEPIC with the PV module input and peak-current-mode control first. Accordingly, the PV voltage controller, as well as the adaptive MPPT controller, is designed. An 80-W prototype system is built. The effectiveness of the proposed methods is proved with some simulation and experimental results. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4631374

Analysis and design of a photovoltaic system DC connected to the utility with a power factor corrector / Yu-Kang Lo in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4354 - 4362 Titre : Analysis and design of a photovoltaic system DC connected to the utility with a power factor corrector Type de document : texte imprimé Auteurs : Yu-Kang Lo, Auteur ; Huang-Jen Chiu, Auteur ; Lee, Ting-Peng, Auteur Article en page(s) : pp. 4354 - 4362 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Grid  connection  Maximum  power  point  tracking  (MPPT)  Power  factor  correction Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a photovoltaic (PV) system parallel connected to an electric power grid with a power factor corrector (PFC) for supplying the DC loads. The operation principles and design considerations for the presented PV system are analyzed and discussed. The balanced distribution of the power flows between the utility and the PV panels is achieved automatically by regulating the output DC voltage of the PFC. Experimental results are shown to verify the feasibility of the proposed topology, which can effectively transfer the tracked maximum power from the PV system to the DC load, while the unity power factor is obtained at the utility side. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226608 [article] Analysis and design of a photovoltaic system DC connected to the utility with a power factor corrector [texte imprimé] / Yu-Kang Lo, Auteur ; Huang-Jen Chiu, Auteur ; Lee, Ting-Peng, Auteur . - pp. 4354 - 4362. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4354 - 4362 Mots-clés : Grid  connection  Maximum  power  point  tracking  (MPPT)  Power  factor  correction Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a photovoltaic (PV) system parallel connected to an electric power grid with a power factor corrector (PFC) for supplying the DC loads. The operation principles and design considerations for the presented PV system are analyzed and discussed. The balanced distribution of the power flows between the utility and the PV panels is achieved automatically by regulating the output DC voltage of the PFC. Experimental results are shown to verify the feasibility of the proposed topology, which can effectively transfer the tracked maximum power from the PV system to the DC load, while the unity power factor is obtained at the utility side. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226608

Fuzzy switching technique applied to PWM boost converter operating in mixed conduction mode for PV systems / Agorreta, Juan Luis in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4363 - 4373 Titre : Fuzzy switching technique applied to PWM boost converter operating in mixed conduction mode for PV systems Type de document : texte imprimé Auteurs : Agorreta, Juan Luis, Auteur ; Reinaldos, Luis, Auteur ; Gonzalez, Roberto, Auteur Article en page(s) : pp. 4363 - 4373 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Boost  converter  Mixed  conduction  mode  (MCM)  Photovoltaic  (PV)  power  systems Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Due to the variation of the maximum power point (MPP) of photovoltaic (PV) generators with solar radiation and temperature, boost DC-DC converters placed between PV modules and inverters in grid-connected PV systems have to be controlled in a variable operating-point condition. In addition, inductor current dynamics changes suddenly when moving from continuous to discontinuous conduction mode. The previous difficulties make the design of reliable and fast control laws for the input voltage of boost converters complicated. The aim of this paper is to propose a control algorithm based on cascaded-loop control. The input voltage is controlled by the outer loop. The inductor current is controlled by an inner loop strategy which is able to perform in mixed conduction mode, owing to the fuzzy switching technique. Simulation and experimental results for a 10-kW boost converter show that the proposed strategy achieves an accurate and robust performance at every operating point, even if the inductor value varies in a wide range; thus, fast MPP tracking techniques can be implemented. An additional advantage is that constant switching frequency is achieved. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4813265 [article] Fuzzy switching technique applied to PWM boost converter operating in mixed conduction mode for PV systems [texte imprimé] / Agorreta, Juan Luis, Auteur ; Reinaldos, Luis, Auteur ; Gonzalez, Roberto, Auteur . - pp. 4363 - 4373. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4363 - 4373 Mots-clés : Boost  converter  Mixed  conduction  mode  (MCM)  Photovoltaic  (PV)  power  systems Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Due to the variation of the maximum power point (MPP) of photovoltaic (PV) generators with solar radiation and temperature, boost DC-DC converters placed between PV modules and inverters in grid-connected PV systems have to be controlled in a variable operating-point condition. In addition, inductor current dynamics changes suddenly when moving from continuous to discontinuous conduction mode. The previous difficulties make the design of reliable and fast control laws for the input voltage of boost converters complicated. The aim of this paper is to propose a control algorithm based on cascaded-loop control. The input voltage is controlled by the outer loop. The inductor current is controlled by an inner loop strategy which is able to perform in mixed conduction mode, owing to the fuzzy switching technique. Simulation and experimental results for a 10-kW boost converter show that the proposed strategy achieves an accurate and robust performance at every operating point, even if the inductor value varies in a wide range; thus, fast MPP tracking techniques can be implemented. An additional advantage is that constant switching frequency is achieved. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4813265

Experimental performance of MPPT algorithm for photovoltaic sources subject to inhomogeneous insolation / Carannante, G. in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4374 - 4380 Titre : Experimental performance of MPPT algorithm for photovoltaic sources subject to inhomogeneous insolation Type de document : texte imprimé Auteurs : Carannante, G., Auteur ; Fraddanno, Ciro, Auteur ; Pagano, Mario, Auteur Article en page(s) : pp. 4374 - 4380 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Cell  missmatch  Maximum  power  Nonuniform  insolation  Photovoltaic  (PV)  technology  Traditional  maximum  power  point  tracking  (MPPT)  method  Urban  context Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Photovoltaic (PV) power system performance depends on local irradiance conditions. PV systems are sometimes subject to partial shading, which may produce a nonideal characteristic curve, presenting true and local power maxima in the P -I curve. Traditional maximum power point tracking (MPPT) algorithms can converge to local maximum, which is not the true MPP. In order to solve the problem, this paper investigates the effects of nonuniform solar irradiance distribution on a PV source. An MPPT algorithm that is able to optimize the source instantaneous operating power under nonuniform irradiance is proposed. The ability of the algorithm and its increased performance with respect to traditional algorithms are evaluated by means of experimental tests performed on a real PV power system. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4813267 [article] Experimental performance of MPPT algorithm for photovoltaic sources subject to inhomogeneous insolation [texte imprimé] / Carannante, G., Auteur ; Fraddanno, Ciro, Auteur ; Pagano, Mario, Auteur . - pp. 4374 - 4380. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4374 - 4380 Mots-clés : Cell  missmatch  Maximum  power  Nonuniform  insolation  Photovoltaic  (PV)  technology  Traditional  maximum  power  point  tracking  (MPPT)  method  Urban  context Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Photovoltaic (PV) power system performance depends on local irradiance conditions. PV systems are sometimes subject to partial shading, which may produce a nonideal characteristic curve, presenting true and local power maxima in the P -I curve. Traditional maximum power point tracking (MPPT) algorithms can converge to local maximum, which is not the true MPP. In order to solve the problem, this paper investigates the effects of nonuniform solar irradiance distribution on a PV source. An MPPT algorithm that is able to optimize the source instantaneous operating power under nonuniform irradiance is proposed. The ability of the algorithm and its increased performance with respect to traditional algorithms are evaluated by means of experimental tests performed on a real PV power system. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4813267

Grid-connected photovoltaic multistring PCS with PV current variation reduction control / Kwon, Jung-Min in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4381 - 4388 Titre : Grid-connected photovoltaic multistring PCS with PV current variation reduction control Type de document : texte imprimé Auteurs : Kwon, Jung-Min, Auteur ; Kwon, Bong-Hwan, Auteur ; Nam, Kwang-Hee, Auteur Article en page(s) : pp. 4381 - 4388 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Maximum  power  point  tracking  (MPPT)  Multistring  Power  conditioning  system  (PCS) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a grid-connected photovoltaic (PV) multistring power conditioning system with PV input current reduction control is proposed. An improved maximum power point tracking (MPPT) method for the multistring converter is suggested. The suggested MPPT algorithm tracks the maximum power point even though measurement errors exist. To reduce the PV current variation introduced by the inverter, a PV current variation reduction control is suggested. This PV current variation reduction control reduces the PV current variation without additional components. The low current variation reduces the filter size and improves the MPPT efficiency. All algorithms and controllers are implemented on a single-chip microcontroller. Experimental results obtained on a 3-kW prototype show high performance such as a MPPT efficiency of 99.7%, an almost unity power factor, a power efficiency of 96.7%, and a total harmonic distortion of 2.0%. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4694044 [article] Grid-connected photovoltaic multistring PCS with PV current variation reduction control [texte imprimé] / Kwon, Jung-Min, Auteur ; Kwon, Bong-Hwan, Auteur ; Nam, Kwang-Hee, Auteur . - pp. 4381 - 4388. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4381 - 4388 Mots-clés : Maximum  power  point  tracking  (MPPT)  Multistring  Power  conditioning  system  (PCS) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a grid-connected photovoltaic (PV) multistring power conditioning system with PV input current reduction control is proposed. An improved maximum power point tracking (MPPT) method for the multistring converter is suggested. The suggested MPPT algorithm tracks the maximum power point even though measurement errors exist. To reduce the PV current variation introduced by the inverter, a PV current variation reduction control is suggested. This PV current variation reduction control reduces the PV current variation without additional components. The low current variation reduces the filter size and improves the MPPT efficiency. All algorithms and controllers are implemented on a single-chip microcontroller. Experimental results obtained on a 3-kW prototype show high performance such as a MPPT efficiency of 99.7%, an almost unity power factor, a power efficiency of 96.7%, and a total harmonic distortion of 2.0%. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4694044

Power injection system for grid-connected photovoltaic generation systems based on two collaborative voltage source inverters / Romero-Cadaval, Enrique in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4389 - 4398 Titre : Power injection system for grid-connected photovoltaic generation systems based on two collaborative voltage source inverters Type de document : texte imprimé Auteurs : Romero-Cadaval, Enrique, Auteur ; Milanes-Montero, Maria Isabel, Auteur ; Gonzalez-Romera, Eva, Auteur Article en page(s) : pp. 4389 - 4398 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Collaborative  converter  Photovoltaic  inverter  Power  injection  system  Power  quality Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a new topology for the power injection system that is based on the parallel association of two voltage source inverters. One operates using a quasi-square voltage waveform strategy, and the other operates with a pulsewidth-modulation (PWM)-based strategy. The aims of this topology are to inject the power from the photovoltaic generation system using the quasi-square inverter and to control the current quality using the PWM inverter. The proposal optimizes the system design, permitting the reduction of system losses and an increase of the energy injected into the grid. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4602698 [article] Power injection system for grid-connected photovoltaic generation systems based on two collaborative voltage source inverters [texte imprimé] / Romero-Cadaval, Enrique, Auteur ; Milanes-Montero, Maria Isabel, Auteur ; Gonzalez-Romera, Eva, Auteur . - pp. 4389 - 4398. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4389 - 4398 Mots-clés : Collaborative  converter  Photovoltaic  inverter  Power  injection  system  Power  quality Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a new topology for the power injection system that is based on the parallel association of two voltage source inverters. One operates using a quasi-square voltage waveform strategy, and the other operates with a pulsewidth-modulation (PWM)-based strategy. The aims of this topology are to inject the power from the photovoltaic generation system using the quasi-square inverter and to control the current quality using the PWM inverter. The proposal optimizes the system design, permitting the reduction of system losses and an increase of the energy injected into the grid. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4602698

Control of a single-phase cascaded H-bridge multilevel inverter for grid-connected photovoltaic systems / Villanueva, Elena in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4399 - 4406 Titre : Control of a single-phase cascaded H-bridge multilevel inverter for grid-connected photovoltaic systems Type de document : texte imprimé Auteurs : Villanueva, Elena, Auteur ; Correa, Pablo, Auteur ; Rodriguez, José, Auteur Article en page(s) : pp. 4399 - 4406 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Multilevel  inverters  Photovoltaic  (PV)  power  systems  Power  conversion Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a single-phase cascaded H-bridge converter for a grid-connected photovoltaic (PV) application. The multilevel topology consists of several H-bridge cells connected in series, each one connected to a string of PV modules. The adopted control scheme permits the independent control of each dc-link voltage, enabling, in this way, the tracking of the maximum power point for each string of PV panels. Additionally, low-ripple sinusoidal-current waveforms are generated with almost unity power factor. The topology offers other advantages such as the operation at lower switching frequency or lower current ripple compared to standard two-level topologies. Simulation and experimental results are presented for different operating conditions. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226596 [article] Control of a single-phase cascaded H-bridge multilevel inverter for grid-connected photovoltaic systems [texte imprimé] / Villanueva, Elena, Auteur ; Correa, Pablo, Auteur ; Rodriguez, José, Auteur . - pp. 4399 - 4406. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4399 - 4406 Mots-clés : Multilevel  inverters  Photovoltaic  (PV)  power  systems  Power  conversion Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a single-phase cascaded H-bridge converter for a grid-connected photovoltaic (PV) application. The multilevel topology consists of several H-bridge cells connected in series, each one connected to a string of PV modules. The adopted control scheme permits the independent control of each dc-link voltage, enabling, in this way, the tracking of the maximum power point for each string of PV panels. Additionally, low-ripple sinusoidal-current waveforms are generated with almost unity power factor. The topology offers other advantages such as the operation at lower switching frequency or lower current ripple compared to standard two-level topologies. Simulation and experimental results are presented for different operating conditions. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226596

Fundamental-frequency-modulated six-level diode-clamped multilevel inverter for three-phase stand-alone photovoltaic system / Ozdemir, Engin in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4407 - 4415 Titre : Fundamental-frequency-modulated six-level diode-clamped multilevel inverter for three-phase stand-alone photovoltaic system Type de document : texte imprimé Auteurs : Ozdemir, Engin, Auteur ; Ozdemir, Sule, Auteur ; Tolbert, Leon M., Auteur Article en page(s) : pp. 4407 - 4415 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Fundamental  switching  Harmonic  elimination  Multilevel  inverter  Photovoltaic  (PV)  system Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a fundamental-frequency-modulated diode-clamped multilevel inverter (DCMLI) scheme for a three-phase stand-alone photovoltaic (PV) system. The system consists of five series-connected PV modules, a six-level DCMLI generating fundamental-modulation staircase three-phase output voltages, and a three-phase induction motor as the load. In order to validate the proposed concept, simulation studies and experimental measurements using a small-scale laboratory prototype are also presented. The results show the feasibility of the fundamental frequency switching application in three-phase stand-alone PV power systems. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4559380 [article] Fundamental-frequency-modulated six-level diode-clamped multilevel inverter for three-phase stand-alone photovoltaic system [texte imprimé] / Ozdemir, Engin, Auteur ; Ozdemir, Sule, Auteur ; Tolbert, Leon M., Auteur . - pp. 4407 - 4415. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4407 - 4415 Mots-clés : Fundamental  switching  Harmonic  elimination  Multilevel  inverter  Photovoltaic  (PV)  system Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a fundamental-frequency-modulated diode-clamped multilevel inverter (DCMLI) scheme for a three-phase stand-alone photovoltaic (PV) system. The system consists of five series-connected PV modules, a six-level DCMLI generating fundamental-modulation staircase three-phase output voltages, and a three-phase induction motor as the load. In order to validate the proposed concept, simulation studies and experimental measurements using a small-scale laboratory prototype are also presented. The results show the feasibility of the fundamental frequency switching application in three-phase stand-alone PV power systems. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4559380

A new multilevel conversion structure for grid-connected PV applications / Grandi, Gabriele in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4416 - 4426 Titre : A new multilevel conversion structure for grid-connected PV applications Type de document : texte imprimé Auteurs : Grandi, Gabriele, Auteur ; Rossi, Claudio, Auteur ; Ostojic, Darko, Auteur Article en page(s) : pp. 4416 - 4426 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Multilevel  systems  Photovoltaic  (PV)  power  systems  Power  conditionning Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : A novel scheme for three-phase grid-connected photovoltaic (PV) generation systems is presented in this paper. The scheme is based on two insulated strings of PV panels, each one feeding the dc bus of a standard two-level three-phase voltage-source inverter (VSI). The inverters are connected to the grid by a three-phase transformer having open-end windings on the inverter side. The resulting conversion structure performs as a multilevel power active filter (equivalent to a three-level inverter), doubling the power capability of a single VSI with given voltage and current ratings. The multilevel voltage waveforms are generated by an improved space-vector-modulation algorithm, suitable for the implementation in industrial digital signal processors. An original control method has been introduced to regulate the dc-link voltages of each VSI, according to the voltage reference given by a single maximum power point tracking controller. The proposed regulation system has been verified by numerical simulations and experimental tests with reference to different operating conditions. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226605 [article] A new multilevel conversion structure for grid-connected PV applications [texte imprimé] / Grandi, Gabriele, Auteur ; Rossi, Claudio, Auteur ; Ostojic, Darko, Auteur . - pp. 4416 - 4426. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4416 - 4426 Mots-clés : Multilevel  systems  Photovoltaic  (PV)  power  systems  Power  conditionning Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : A novel scheme for three-phase grid-connected photovoltaic (PV) generation systems is presented in this paper. The scheme is based on two insulated strings of PV panels, each one feeding the dc bus of a standard two-level three-phase voltage-source inverter (VSI). The inverters are connected to the grid by a three-phase transformer having open-end windings on the inverter side. The resulting conversion structure performs as a multilevel power active filter (equivalent to a three-level inverter), doubling the power capability of a single VSI with given voltage and current ratings. The multilevel voltage waveforms are generated by an improved space-vector-modulation algorithm, suitable for the implementation in industrial digital signal processors. An original control method has been introduced to regulate the dc-link voltages of each VSI, according to the voltage reference given by a single maximum power point tracking controller. The proposed regulation system has been verified by numerical simulations and experimental tests with reference to different operating conditions. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226605

A new topology with high efficiency throughout all load range for photovoltaic PCS / Min, Byung-Duk in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4427 - 4435 Titre : A new topology with high efficiency throughout all load range for photovoltaic PCS Type de document : texte imprimé Auteurs : Min, Byung-Duk, Auteur ; Lee, Jong-Pil, Auteur ; Kim, Jong-Hyun, Auteur Article en page(s) : pp. 4427 - 4435 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : DC/DC  full-bridge  converter  Grid-connected  inverter  Photovoltaic  (PV)  Power  conditionning  system  (PCS)  Renewable  energy  system Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a new topology is proposed that can significantly reduce the converter rated power and increase the efficiency of total photovoltaic (PV) system. Since the output voltage of PV module has very wide operating range, in general, the DC/DC converter is used to produce constant high-DC-link voltage for DC/AC inverter. According to the analysis of the proposed topology, only 20% of total PV system power is processed by the DC/DC power conversion stage. The DC/DC power conversion stage used in proposed topology has flat efficiency curve throughout all load range and very high efficiency characteristics. In the proposed topology, because the converter efficiency curve is almost flat throughout all load range, the total system efficiency at light load is dramatically improved. The proposed topology is implemented for 250-kW power conditioning system. This system has only three DC/DC power conversion stage with 24-kW rated power. It is only one-third of total system power. The experimental results show that the proposed topology has good performance. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4559379 [article] A new topology with high efficiency throughout all load range for photovoltaic PCS [texte imprimé] / Min, Byung-Duk, Auteur ; Lee, Jong-Pil, Auteur ; Kim, Jong-Hyun, Auteur . - pp. 4427 - 4435. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4427 - 4435 Mots-clés : DC/DC  full-bridge  converter  Grid-connected  inverter  Photovoltaic  (PV)  Power  conditionning  system  (PCS)  Renewable  energy  system Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a new topology is proposed that can significantly reduce the converter rated power and increase the efficiency of total photovoltaic (PV) system. Since the output voltage of PV module has very wide operating range, in general, the DC/DC converter is used to produce constant high-DC-link voltage for DC/AC inverter. According to the analysis of the proposed topology, only 20% of total PV system power is processed by the DC/DC power conversion stage. The DC/DC power conversion stage used in proposed topology has flat efficiency curve throughout all load range and very high efficiency characteristics. In the proposed topology, because the converter efficiency curve is almost flat throughout all load range, the total system efficiency at light load is dramatically improved. The proposed topology is implemented for 250-kW power conditioning system. This system has only three DC/DC power conversion stage with 24-kW rated power. It is only one-third of total system power. The experimental results show that the proposed topology has good performance. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4559379

A single-phase voltage-controlled grid-connected photovoltaic system with power quality conditioner functionality / Mastromauro, Rosa A. in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4436 - 4444 Titre : A single-phase voltage-controlled grid-connected photovoltaic system with power quality conditioner functionality Type de document : texte imprimé Auteurs : Mastromauro, Rosa A., Auteur ; Liserre, Marco, Auteur ; Kerekes, Tamas, Auteur Article en page(s) : pp. 4436 - 4444 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Maximum  power  point  tracking  (MPPT)  algorithm  Shunt  controller  Single-phase  photovoltaic  (PV)  inverter Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Future ancillary services provided by photovoltaic (PV) systems could facilitate their penetration in power systems. In addition, low-power PV systems can be designed to improve the power quality. This paper presents a single-phase PV system that provides grid voltage support and compensation of harmonic distortion at the point of common coupling thanks to a repetitive controller. The power provided by the PV panels is controlled by a Maximum Power Point Tracking algorithm based on the incremental conductance method specifically modified to control the phase of the PV inverter voltage. Simulation and experimental results validate the presented solution. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4608749 [article] A single-phase voltage-controlled grid-connected photovoltaic system with power quality conditioner functionality [texte imprimé] / Mastromauro, Rosa A., Auteur ; Liserre, Marco, Auteur ; Kerekes, Tamas, Auteur . - pp. 4436 - 4444. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4436 - 4444 Mots-clés : Maximum  power  point  tracking  (MPPT)  algorithm  Shunt  controller  Single-phase  photovoltaic  (PV)  inverter Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Future ancillary services provided by photovoltaic (PV) systems could facilitate their penetration in power systems. In addition, low-power PV systems can be designed to improve the power quality. This paper presents a single-phase PV system that provides grid voltage support and compensation of harmonic distortion at the point of common coupling thanks to a repetitive controller. The power provided by the PV panels is controlled by a Maximum Power Point Tracking algorithm based on the incremental conductance method specifically modified to control the phase of the PV inverter voltage. Simulation and experimental results validate the presented solution. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4608749

Wavelet-based islanding detection in grid-connected PV systems / Pigazo, Alberto in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4445 - 4455 Titre : Wavelet-based islanding detection in grid-connected PV systems Type de document : texte imprimé Auteurs : Pigazo, Alberto, Auteur ; Liserre, Marco, Auteur ; Mastromauro, Rosa A., Auteur Article en page(s) : pp. 4445 - 4455 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Islanding  Photovoltaic  (PV)  power  systems  Wavelet  transforms Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Distributed power generation systems (DPGSs) based on inverters require reliable islanding detection algorithms (passive or active) in order to determine the electrical grid status and operate the grid-connected inverter properly. These methods are based on the analysis of the DPGS voltage, current, and power in time or frequency domain. This paper proposes a time-frequency detection algorithm based on monitoring the DPGS output power considering the influence of the pulsewidth modulation, the output LCL filter, and the employed current controller. Wavelet analysis is applied to obtain time localization of the islanding condition. Simulation and experimental results show the performance of the proposed detection algorithm in comparison with existing methods. DEWEY : 621.38 ISSN : 0279-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4559381 [article] Wavelet-based islanding detection in grid-connected PV systems [texte imprimé] / Pigazo, Alberto, Auteur ; Liserre, Marco, Auteur ; Mastromauro, Rosa A., Auteur . - pp. 4445 - 4455. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4445 - 4455 Mots-clés : Islanding  Photovoltaic  (PV)  power  systems  Wavelet  transforms Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Distributed power generation systems (DPGSs) based on inverters require reliable islanding detection algorithms (passive or active) in order to determine the electrical grid status and operate the grid-connected inverter properly. These methods are based on the analysis of the DPGS voltage, current, and power in time or frequency domain. This paper proposes a time-frequency detection algorithm based on monitoring the DPGS output power considering the influence of the pulsewidth modulation, the output LCL filter, and the employed current controller. Wavelet analysis is applied to obtain time localization of the islanding condition. Simulation and experimental results show the performance of the proposed detection algorithm in comparison with existing methods. DEWEY : 621.38 ISSN : 0279-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4559381

Descriptive and inferential statistics for supervising and monitoring the operation of PV plants / Vergura, Silvano in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4456 - 4464 Titre : Descriptive and inferential statistics for supervising and monitoring the operation of PV plants Type de document : texte imprimé Auteurs : Vergura, Silvano, Auteur ; Acciani, Giuseppe, Auteur ; Amoruso, Vitantonio, Auteur Article en page(s) : pp. 4456 - 4464 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Analysis  of  variance  (ANOVA)  Kruskal-wallis  test  Kurtosis  Photovoltaic  (PV)  system  monitoring  Skewness Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper deals with the problem of supervising and monitoring a photovoltaic (PV) plant. First, an offline descriptive and inferential statistical procedure for evaluating the goodness of system performance is presented. Then, an online inferential algorithm for real-time monitoring and fault detection is introduced. The two methodologies utilize the energy output of inverters as input data and are valid for both Gaussian and non-normal distribution of data. The procedures have been tested on a real PV installation, and results are reported for the case of a grid-connected PV plant in Italy for which one PV module over 132 resulted in being badly connected. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4555650 [article] Descriptive and inferential statistics for supervising and monitoring the operation of PV plants [texte imprimé] / Vergura, Silvano, Auteur ; Acciani, Giuseppe, Auteur ; Amoruso, Vitantonio, Auteur . - pp. 4456 - 4464. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4456 - 4464 Mots-clés : Analysis  of  variance  (ANOVA)  Kruskal-wallis  test  Kurtosis  Photovoltaic  (PV)  system  monitoring  Skewness Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper deals with the problem of supervising and monitoring a photovoltaic (PV) plant. First, an offline descriptive and inferential statistical procedure for evaluating the goodness of system performance is presented. Then, an online inferential algorithm for real-time monitoring and fault detection is introduced. The two methodologies utilize the energy output of inverters as input data and are valid for both Gaussian and non-normal distribution of data. The procedures have been tested on a real PV installation, and results are reported for the case of a grid-connected PV plant in Italy for which one PV module over 132 resulted in being badly connected. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4555650

Design strategy to optimize the reliability of grid-connected PV systems / Chan, Freddy in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4465 - 4472 Titre : Design strategy to optimize the reliability of grid-connected PV systems Type de document : texte imprimé Auteurs : Chan, Freddy, Auteur ; Calleja, Hugo, Auteur Article en page(s) : pp. 4465 - 4472 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Design  of  experiments  (DOE)  Photovoltaic  (PV)  inverters  Reability Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a strategy, based on the design-of-experiments technique, aimed at optimizing the reliability in inverters for photovoltaic systems. The process involves designing the inverter several times, each time with different specifications, and calculating the reliability for each design. The specifications are established in a systematic manner, in such a way that the parameters with the highest impact are easily identified. The optimization procedure follows a standard reliability estimation methodology and involves modifying the stress factors in a judicious manner. The strategy is exemplified with an integrated boost inverter and a desired mean time between failures of 12 years. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4559371 [article] Design strategy to optimize the reliability of grid-connected PV systems [texte imprimé] / Chan, Freddy, Auteur ; Calleja, Hugo, Auteur . - pp. 4465 - 4472. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4465 - 4472 Mots-clés : Design  of  experiments  (DOE)  Photovoltaic  (PV)  inverters  Reability Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a strategy, based on the design-of-experiments technique, aimed at optimizing the reliability in inverters for photovoltaic systems. The process involves designing the inverter several times, each time with different specifications, and calculating the reliability for each design. The specifications are established in a systematic manner, in such a way that the parameters with the highest impact are easily identified. The optimization procedure follows a standard reliability estimation methodology and involves modifying the stress factors in a judicious manner. The strategy is exemplified with an integrated boost inverter and a desired mean time between failures of 12 years. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4559371

A technique for improving P&O MPPT performances of double-stage grid-connected photovoltaic systems / Femia, Nicola in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4473 - 4482 Titre : A technique for improving P&O MPPT performances of double-stage grid-connected photovoltaic systems Type de document : texte imprimé Auteurs : Femia, Nicola, Auteur ; Petrone, Giovanni, Auteur ; Spagnuolo, Giovanni, Auteur Article en page(s) : pp. 4473 - 4482 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Inverter  Maximum  power  point  tracking  Photovoltaic  power  processing  systems Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In double-stage grid-connected photovoltaic (PV) inverters, the dynamic interactions among the DC/DC and DC/AC stages and the maximum power point tracking (MPPT) controller may reduce the system performances. In this paper, the detrimental effects, particularly in terms of system efficiency and MPPT performances, of the oscillations of the PV array voltage, taking place at the second harmonic of the grid frequency are evidenced. The use of a proper compensation network acting on the error signal between a reference signal provided by the MPPT controller and a signal that is proportional to the PV array voltage is proposed. The guidelines for the proper joint design of the compensation network (which is able to cancel out the PV voltage oscillations) and of the main MPPT parameters are provided in this paper. Simulation results and experimental measurements confirm the effectiveness of the proposed approach. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226607 [article] A technique for improving P&O MPPT performances of double-stage grid-connected photovoltaic systems [texte imprimé] / Femia, Nicola, Auteur ; Petrone, Giovanni, Auteur ; Spagnuolo, Giovanni, Auteur . - pp. 4473 - 4482. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4473 - 4482 Mots-clés : Inverter  Maximum  power  point  tracking  Photovoltaic  power  processing  systems Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In double-stage grid-connected photovoltaic (PV) inverters, the dynamic interactions among the DC/DC and DC/AC stages and the maximum power point tracking (MPPT) controller may reduce the system performances. In this paper, the detrimental effects, particularly in terms of system efficiency and MPPT performances, of the oscillations of the PV array voltage, taking place at the second harmonic of the grid frequency are evidenced. The use of a proper compensation network acting on the error signal between a reference signal provided by the MPPT controller and a signal that is proportional to the PV array voltage is proposed. The guidelines for the proper joint design of the compensation network (which is able to cancel out the PV voltage oscillations) and of the main MPPT parameters are provided in this paper. Simulation results and experimental measurements confirm the effectiveness of the proposed approach. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226607

Parameter design of a two-current-loop controller used in a grid-connected inverter system with LCL filter / Fei Liu in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4483 - 4491 Titre : Parameter design of a two-current-loop controller used in a grid-connected inverter system with LCL filter Type de document : texte imprimé Auteurs : Fei Liu, Auteur ; Zhou, Yan, Auteur ; Duan, Shanxu, Auteur Article en page(s) : pp. 4483 - 4491 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Grid  connected  LCL  filter  Renewable  energy  generation  Two-current-loop  controller Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : LCL filters offer a better choice of attenuating switching frequency harmonics. However, in a grid-connected system, an LCL filter may cause resonance which is a disaster for the system's stability. In order to solve the problem, a two-current-loop control strategy, which includes grid-current outer loop and filter-capacitor-current inner loop, is adopted here. The implementation of this strategy is easy, but the tuning procedure is complex since the outer and inner controllers cannot cooperate well if the parameters of the controllers are not suitable. There is no literature which mentions a method to help give out accurate parameters of the controller. The difficulty of designing the controller is that only two feedbacks cannot provide complete information of a three-order LCL filter. A specific method is proposed in this paper to design the controller. The advantage of this method is to provide a way to maximize the utilization of the two feedbacks to get good system performance through parameter determination. The practicability of the method is tested by using bode diagram, and the antidistortion ability of the system is analyzed. Finally, experimental results verify the availability and correctness of the proposed method. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4909027 [article] Parameter design of a two-current-loop controller used in a grid-connected inverter system with LCL filter [texte imprimé] / Fei Liu, Auteur ; Zhou, Yan, Auteur ; Duan, Shanxu, Auteur . - pp. 4483 - 4491. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4483 - 4491 Mots-clés : Grid  connected  LCL  filter  Renewable  energy  generation  Two-current-loop  controller Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : LCL filters offer a better choice of attenuating switching frequency harmonics. However, in a grid-connected system, an LCL filter may cause resonance which is a disaster for the system's stability. In order to solve the problem, a two-current-loop control strategy, which includes grid-current outer loop and filter-capacitor-current inner loop, is adopted here. The implementation of this strategy is easy, but the tuning procedure is complex since the outer and inner controllers cannot cooperate well if the parameters of the controllers are not suitable. There is no literature which mentions a method to help give out accurate parameters of the controller. The difficulty of designing the controller is that only two feedbacks cannot provide complete information of a three-order LCL filter. A specific method is proposed in this paper to design the controller. The advantage of this method is to provide a way to maximize the utilization of the two feedbacks to get good system performance through parameter determination. The practicability of the method is tested by using bode diagram, and the antidistortion ability of the system is analyzed. Finally, experimental results verify the availability and correctness of the proposed method. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4909027

Control design guidelines for single-phase grid-connected photovoltaic inverters with damped resonant harmonic compensators / Castilla, Miguel in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4492 - 4501 Titre : Control design guidelines for single-phase grid-connected photovoltaic inverters with damped resonant harmonic compensators Type de document : texte imprimé Auteurs : Castilla, Miguel, Auteur ; Miret, Jaume, Auteur ; Matas, José, Auteur Article en page(s) : pp. 4492 - 4501 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Current  harmonic  content  Grid-connected  inverter  Linear  current  regulator  Photovoltaic  (PV)  power  system Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The injection of low-harmonic current to the electrical grid is nowadays regulated by international standards. In order to accomplish these standards, selective harmonic compensation is carried out in grid-connected photovoltaic inverters by means of resonant harmonic compensators. This paper gives a systematic design procedure for selecting the gains and parameters of these harmonic compensators. Other factors considered in the design process include frequency deviation, grid synchronization, and transient response. Both a design example meeting the requirements of grid interconnection and selected experimental results from a digital-signal-processor-based laboratory prototype are also reported. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4801759 [article] Control design guidelines for single-phase grid-connected photovoltaic inverters with damped resonant harmonic compensators [texte imprimé] / Castilla, Miguel, Auteur ; Miret, Jaume, Auteur ; Matas, José, Auteur . - pp. 4492 - 4501. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4492 - 4501 Mots-clés : Current  harmonic  content  Grid-connected  inverter  Linear  current  regulator  Photovoltaic  (PV)  power  system Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The injection of low-harmonic current to the electrical grid is nowadays regulated by international standards. In order to accomplish these standards, selective harmonic compensation is carried out in grid-connected photovoltaic inverters by means of resonant harmonic compensators. This paper gives a systematic design procedure for selecting the gains and parameters of these harmonic compensators. Other factors considered in the design process include frequency deviation, grid synchronization, and transient response. Both a design example meeting the requirements of grid interconnection and selected experimental results from a digital-signal-processor-based laboratory prototype are also reported. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4801759

Indoor power harvesting using photovoltaic cells for low-power applications / Nasiri, Adel in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4502 - 4509 Titre : Indoor power harvesting using photovoltaic cells for low-power applications Type de document : texte imprimé Auteurs : Nasiri, Adel, Auteur ; Zabalawi, Salaheddin A., Auteur ; Mandic, Goran, Auteur Article en page(s) : pp. 4502 - 4509 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Energy  harvesting  Energy  storage  Indoor  photovoltaic  (PV)  Low-power  devices Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Utilization of low-power indoor devices such as remote sensors, supervisory and alarm systems, distributed controls, and data transfer system is on steady rise. Due to remote and distributed nature of these systems, it is attractive to avoid using electrical wiring to supply power to them. Primary batteries have been used for this application for many years, but they require regular maintenance at usually hard to access places. This paper provides a complete analysis of a photovoltaic (PV) harvesting system for indoor low-power applications. The characteristics of a target load, PV cell, and power conditioning circuit are discussed. Different choices of energy storage are also explained. Implementation and test results of the system are presented, which highlights the practical issues and limitations of the system. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4838877 [article] Indoor power harvesting using photovoltaic cells for low-power applications [texte imprimé] / Nasiri, Adel, Auteur ; Zabalawi, Salaheddin A., Auteur ; Mandic, Goran, Auteur . - pp. 4502 - 4509. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4502 - 4509 Mots-clés : Energy  harvesting  Energy  storage  Indoor  photovoltaic  (PV)  Low-power  devices Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Utilization of low-power indoor devices such as remote sensors, supervisory and alarm systems, distributed controls, and data transfer system is on steady rise. Due to remote and distributed nature of these systems, it is attractive to avoid using electrical wiring to supply power to them. Primary batteries have been used for this application for many years, but they require regular maintenance at usually hard to access places. This paper provides a complete analysis of a photovoltaic (PV) harvesting system for indoor low-power applications. The characteristics of a target load, PV cell, and power conditioning circuit are discussed. Different choices of energy storage are also explained. Implementation and test results of the system are presented, which highlights the practical issues and limitations of the system. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4838877

Voltage support provided by a droop-controlled multifunctional inverter / Vasquez, Juan C. in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4510 - 4519 Titre : Voltage support provided by a droop-controlled multifunctional inverter Type de document : texte imprimé Auteurs : Vasquez, Juan C., Auteur ; Mastromauro, Rosa A., Auteur ; Guerrero, Josef M., Auteur Article en page(s) : pp. 4510 - 4519 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Droop-control  technique  Single-phase  photovoltaic  (PV)  inverter  Voltage  ride-through  Voltage-source  inverter Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a single-phase multifunctional inverter for photovoltaic (PV) systems application. The converter provides active power to local loads and injects reactive power into the grid providing voltage support at fundamental frequency. The proposed topology is controlled by means of the droop-control technique. Hence, it allows the obtaining of voltage-sag-compensation capability, endowing voltage ride-through to the system. A model and analysis of the whole system is given to properly choose the control parameters. Simulation and experimental results validate the proposed control using a 5-kVA PV converter. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4787068 [article] Voltage support provided by a droop-controlled multifunctional inverter [texte imprimé] / Vasquez, Juan C., Auteur ; Mastromauro, Rosa A., Auteur ; Guerrero, Josef M., Auteur . - pp. 4510 - 4519. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4510 - 4519 Mots-clés : Droop-control  technique  Single-phase  photovoltaic  (PV)  inverter  Voltage  ride-through  Voltage-source  inverter Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a single-phase multifunctional inverter for photovoltaic (PV) systems application. The converter provides active power to local loads and injects reactive power into the grid providing voltage support at fundamental frequency. The proposed topology is controlled by means of the droop-control technique. Hence, it allows the obtaining of voltage-sag-compensation capability, endowing voltage ride-through to the system. A model and analysis of the whole system is given to properly choose the control parameters. Simulation and experimental results validate the proposed control using a 5-kVA PV converter. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4787068

Are manufacturing I – V mismatch and reverse currents key factors in large photovoltaic arrays? / Spertino, Filippo in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4520 - 4531 Titre : Are manufacturing I – V mismatch and reverse currents key factors in large photovoltaic arrays? Type de document : texte imprimé Auteurs : Spertino, Filippo, Auteur ; Akilimali, Jean Sumaili, Auteur Article en page(s) : pp. 4520 - 4531 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Blocking  diodes  Equivalent-circuit  parameters  Manufacturing  I-V  mismatch  Photovoltaic  (PV)  arrays  PV  module  Reverse  current Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, two factors typical of large photovoltaic (PV) arrays are investigated: one is the current-voltage (I-V) mismatch consequent to the production tolerance; the other is the impact of reverse currents in different operating conditions. Concerning the manufacturing I-V mismatch, the parameters of the equivalent circuit of the solar cell are computed for several PV modules from flash reports provided by the manufacturers. The corresponding I-V characteristic of every module is used to evaluate the behavior of different strings and the interaction among the strings connected for composing PV arrays. Two real crystalline silicon PV systems of 8 times 250 kW and 20 kW are studied, respectively. The simulation results reveal that the impact of the I-V mismatch is negligible with the usual tolerance, and the insertion of the blocking diodes against reverse currents can be avoided with crystalline silicon technology. On the other hand, the experimental results on I-V characteristics of the aforementioned arrays put into evidence the existence of a remarkable power deviation (3%-4%) with respect to the rated power, linkable to the lack of measurement uncertainty in the manufacturer flash reports. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5129957 [article] Are manufacturing I – V mismatch and reverse currents key factors in large photovoltaic arrays? [texte imprimé] / Spertino, Filippo, Auteur ; Akilimali, Jean Sumaili, Auteur . - pp. 4520 - 4531. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4520 - 4531 Mots-clés : Blocking  diodes  Equivalent-circuit  parameters  Manufacturing  I-V  mismatch  Photovoltaic  (PV)  arrays  PV  module  Reverse  current Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, two factors typical of large photovoltaic (PV) arrays are investigated: one is the current-voltage (I-V) mismatch consequent to the production tolerance; the other is the impact of reverse currents in different operating conditions. Concerning the manufacturing I-V mismatch, the parameters of the equivalent circuit of the solar cell are computed for several PV modules from flash reports provided by the manufacturers. The corresponding I-V characteristic of every module is used to evaluate the behavior of different strings and the interaction among the strings connected for composing PV arrays. Two real crystalline silicon PV systems of 8 times 250 kW and 20 kW are studied, respectively. The simulation results reveal that the impact of the I-V mismatch is negligible with the usual tolerance, and the insertion of the blocking diodes against reverse currents can be avoided with crystalline silicon technology. On the other hand, the experimental results on I-V characteristics of the aforementioned arrays put into evidence the existence of a remarkable power deviation (3%-4%) with respect to the rated power, linkable to the lack of measurement uncertainty in the manufacturer flash reports. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5129957

Short-circuit detection by means of empirical mode decomposition and wigner–ville distribution for PMSM running under dynamic condition / Rosero, Javier A. in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4534 - 4547 Titre : Short-circuit detection by means of empirical mode decomposition and wigner–ville distribution for PMSM running under dynamic condition Type de document : texte imprimé Auteurs : Rosero, Javier A., Auteur ; Romeral, Luis, Auteur ; Ortega, Juan A., Auteur Article en page(s) : pp. 4534 - 4547 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Electric  machines  Empirical  mode  decomposition  (EMD)  Fault  diagnosis  Intrinsis  mode  function  (IMF)  Motor  diagnosis  Permanent-magnet  motors  Wigner-ville  distribution  (WVD) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents and analyzes a method for short-circuit fault detection in a permanent-magnet synchronous motor (PMSM). The study includes steady-state condition and speed transients in motor operation. The stator current is decomposed by empirical mode decomposition (EMD), which generates a set of intrinsic mode functions (IMFs). Quadratic time-frequency (TF) distributions such as smoothed pseudo-Wigner-Ville and Zhao-Atlas-Marks are applied on the more significant IMFs for fault detection. Simulations and experimental laboratory tests validate the algorithms and demonstrate that this kind of TF analysis can be applied to detect and identify short-circuit failures in PMSM. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4745804 [article] Short-circuit detection by means of empirical mode decomposition and wigner–ville distribution for PMSM running under dynamic condition [texte imprimé] / Rosero, Javier A., Auteur ; Romeral, Luis, Auteur ; Ortega, Juan A., Auteur . - pp. 4534 - 4547. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4534 - 4547 Mots-clés : Electric  machines  Empirical  mode  decomposition  (EMD)  Fault  diagnosis  Intrinsis  mode  function  (IMF)  Motor  diagnosis  Permanent-magnet  motors  Wigner-ville  distribution  (WVD) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents and analyzes a method for short-circuit fault detection in a permanent-magnet synchronous motor (PMSM). The study includes steady-state condition and speed transients in motor operation. The stator current is decomposed by empirical mode decomposition (EMD), which generates a set of intrinsic mode functions (IMFs). Quadratic time-frequency (TF) distributions such as smoothed pseudo-Wigner-Ville and Zhao-Atlas-Marks are applied on the more significant IMFs for fault detection. Simulations and experimental laboratory tests validate the algorithms and demonstrate that this kind of TF analysis can be applied to detect and identify short-circuit failures in PMSM. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4745804

Diagnosis of induction machines'rotor faults in time-varying conditions / Stefani, Andrea in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4548 - 4556 Titre : Diagnosis of induction machines'rotor faults in time-varying conditions Type de document : texte imprimé Auteurs : Stefani, Andrea, Auteur ; Bellini, Alberto, Auteur ; Filippetti, Fiorenzo, Auteur Article en page(s) : pp. 4548 - 4556 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Fault  diagnosis  Induction  motor  drives  Time- Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Motor current signature analysis is the reference method for the diagnosis of induction machines' rotor faults; however, in time-varying conditions, it fails as slip and speed vary, and, thus, sideband components are spread in a bandwidth that is proportional to the variation. Variable speed drive applications are common in the aerospace, appliance, railway, and automotive industries and also in electric generators for wind turbines. In this paper, a simple and effective method is presented that allows the diagnosis of rotor faults for induction machine drives in time-varying conditions. It is tailored to direct rotor flux field-oriented controlled drives, where the control system provides suitable signals that are exploited for the demodulation to a constant frequency of time-varying signatures related to the rotor faults. Simulations and experiments are reported to validate the proposed method on a critical speed transient. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4801642 [article] Diagnosis of induction machines'rotor faults in time-varying conditions [texte imprimé] / Stefani, Andrea, Auteur ; Bellini, Alberto, Auteur ; Filippetti, Fiorenzo, Auteur . - pp. 4548 - 4556. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4548 - 4556 Mots-clés : Fault  diagnosis  Induction  motor  drives  Time- Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Motor current signature analysis is the reference method for the diagnosis of induction machines' rotor faults; however, in time-varying conditions, it fails as slip and speed vary, and, thus, sideband components are spread in a bandwidth that is proportional to the variation. Variable speed drive applications are common in the aerospace, appliance, railway, and automotive industries and also in electric generators for wind turbines. In this paper, a simple and effective method is presented that allows the diagnosis of rotor faults for induction machine drives in time-varying conditions. It is tailored to direct rotor flux field-oriented controlled drives, where the control system provides suitable signals that are exploited for the demodulation to a constant frequency of time-varying signatures related to the rotor faults. Simulations and experiments are reported to validate the proposed method on a critical speed transient. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4801642

Instantaneous frequency of the left sideband harmonic during the start-up transient: a new method for diagnosis of broken bars / Pineda-Sanchez, Manuel in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4557 - 4570 Titre : Instantaneous frequency of the left sideband harmonic during the start-up transient: a new method for diagnosis of broken bars Type de document : texte imprimé Auteurs : Pineda-Sanchez, Manuel, Auteur ; Riera-Guasp, Martin, Auteur ; Antonino-Daviu, Jose Alfonso, Auteur Article en page(s) : pp. 4557 - 4570 Note générale : Gébie électrique Langues : Anglais (eng) Mots-clés : Fault  diagnosis  Frequency  estimation  Hilbert  transform  (HT)  Induction  motors  Time-frequency  analysis  Wavelet  transform  (WT) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a new method for detecting the presence of broken rotor bars is presented. The proposed approach is valid for induction machines started at constant frequency and consists of extracting the instantaneous frequency (IF) of the left sideband harmonic (LSH) from the start-up current (LSHst), via the Hilbert transform. It is shown that, in the case of machines with one or several broken bars, the IF of the LSHst exhibits a very characteristic and easy to identify pattern, which is physically justified. This paper also shows that, if the IF of the LSHst is represented against the slip, a universal fault indicator (nondependent neither on the machine characteristics nor on the starting conditions) can be defined. This fault indicator consists of the correlation between the experimental IF of the LSHst and its theoretical evolution. This approach is theoretically introduced and experimentally validated by testing a commercial motor in faulty and healthy conditions, under different operating conditions. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5153309 [article] Instantaneous frequency of the left sideband harmonic during the start-up transient: a new method for diagnosis of broken bars [texte imprimé] / Pineda-Sanchez, Manuel, Auteur ; Riera-Guasp, Martin, Auteur ; Antonino-Daviu, Jose Alfonso, Auteur . - pp. 4557 - 4570. Gébie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4557 - 4570 Mots-clés : Fault  diagnosis  Frequency  estimation  Hilbert  transform  (HT)  Induction  motors  Time-frequency  analysis  Wavelet  transform  (WT) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a new method for detecting the presence of broken rotor bars is presented. The proposed approach is valid for induction machines started at constant frequency and consists of extracting the instantaneous frequency (IF) of the left sideband harmonic (LSH) from the start-up current (LSHst), via the Hilbert transform. It is shown that, in the case of machines with one or several broken bars, the IF of the LSHst exhibits a very characteristic and easy to identify pattern, which is physically justified. This paper also shows that, if the IF of the LSHst is represented against the slip, a universal fault indicator (nondependent neither on the machine characteristics nor on the starting conditions) can be defined. This fault indicator consists of the correlation between the experimental IF of the LSHst and its theoretical evolution. This approach is theoretically introduced and experimentally validated by testing a commercial motor in faulty and healthy conditions, under different operating conditions. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5153309

Separating broken rotor bars and load oscillations on IM fault diagnosis through the instantaneous active and reactive currents / Bossio, Guillermo R. in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4571 - 4580 Titre : Separating broken rotor bars and load oscillations on IM fault diagnosis through the instantaneous active and reactive currents Type de document : texte imprimé Auteurs : Bossio, Guillermo R., Auteur ; De Angelo, Cristian H., Auteur ; Bossio, José M., Auteur Article en page(s) : pp. 4571 - 4580 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Broken  rotor  bar  Fault  diagnosis  Induction  motor  (IM)  Instantaneous  active  ans  reactive  currents  Load  oscillations Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : A new method for broken rotor bars and load oscillation diagnosis on induction motors is presented. The proposed strategy is based on the decomposition of the stator currents into their instantaneous active and reactive current components. Such components allow the decoupling of the effects produced by rotor asymmetries from those produced by oscillating loads. This allows not only the proper fault detection but also a correct fault diagnosis. Simulation and experimental results, both from laboratory and industrial cases, are presented to validate the proposal. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5071292 [article] Separating broken rotor bars and load oscillations on IM fault diagnosis through the instantaneous active and reactive currents [texte imprimé] / Bossio, Guillermo R., Auteur ; De Angelo, Cristian H., Auteur ; Bossio, José M., Auteur . - pp. 4571 - 4580. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4571 - 4580 Mots-clés : Broken  rotor  bar  Fault  diagnosis  Induction  motor  (IM)  Instantaneous  active  ans  reactive  currents  Load  oscillations Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : A new method for broken rotor bars and load oscillation diagnosis on induction motors is presented. The proposed strategy is based on the decomposition of the stator currents into their instantaneous active and reactive current components. Such components allow the decoupling of the effects produced by rotor asymmetries from those produced by oscillating loads. This allows not only the proper fault detection but also a correct fault diagnosis. Simulation and experimental results, both from laboratory and industrial cases, are presented to validate the proposal. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5071292

Induction motor diagnosis using line neutral voltage signatures / Khezzar, Abdelmalek in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4581 - 4591 Titre : Induction motor diagnosis using line neutral voltage signatures Type de document : texte imprimé Auteurs : Khezzar, Abdelmalek, Auteur ; El Kamel Oumaamar, Mohamed, Auteur ; Hadjami, Marouane, Auteur Article en page(s) : pp. 4581 - 4591 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Fault  diagnosis  Induction  motors  Neural  voltage  Rotor  default  Rotor  slot  harmonics  (RSH) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents an analytical approach to shed light on the necessary relationships required for the presence of induction motor diagnosis signatures in the line neutral voltage (the voltage taking place between the supply and the stator neutrals). Special attention is focused on the effect of both space distribution of rotor bars and rotor dissymmetry on the mechanism of generation of diagnosis signatures with consideration of voltage supply unbalance and speed ripples. Generalized and new formulas are proposed, where we can draw a conclusion on the state of the machine. Simulation and experimental results have shown excellent match with theoretically predicted harmonic components. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4689401 [article] Induction motor diagnosis using line neutral voltage signatures [texte imprimé] / Khezzar, Abdelmalek, Auteur ; El Kamel Oumaamar, Mohamed, Auteur ; Hadjami, Marouane, Auteur . - pp. 4581 - 4591. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4581 - 4591 Mots-clés : Fault  diagnosis  Induction  motors  Neural  voltage  Rotor  default  Rotor  slot  harmonics  (RSH) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents an analytical approach to shed light on the necessary relationships required for the presence of induction motor diagnosis signatures in the line neutral voltage (the voltage taking place between the supply and the stator neutrals). Special attention is focused on the effect of both space distribution of rotor bars and rotor dissymmetry on the mechanism of generation of diagnosis signatures with consideration of voltage supply unbalance and speed ripples. Generalized and new formulas are proposed, where we can draw a conclusion on the state of the machine. Simulation and experimental results have shown excellent match with theoretically predicted harmonic components. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4689401

On the use of slot harmonics as a potential indicator of rotor bar breakage in the induction machine / Khezzar, Abdelmalek in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4592 - 4605 Titre : On the use of slot harmonics as a potential indicator of rotor bar breakage in the induction machine Type de document : texte imprimé Auteurs : Khezzar, Abdelmalek, Auteur ; Kaikaa, Mohamed Yazid, Auteur ; El Kamel Oumaamar, Mohamed, Auteur Article en page(s) : pp. 4592 - 4605 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Fault  diagnosis  Induction  motors  Motor  slots  Rotor  default  Unbalanced  supply Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper sheds light on the additional harmonic components arising from broken bars fault in the stator line current of an induction machine, which are generalized and analyzed in a different manner than of those given in the literature. Special attention is focused on the effect of both motor slots and rotor dissymmetry on the mechanism of the generation of the different harmonic components with consideration of the unbalance voltage supply and speed ripples effects. Aside from the well-known diagnosis signatures, new ones show up. The simulation and experimental results confirm the aforementioned study. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226610 [article] On the use of slot harmonics as a potential indicator of rotor bar breakage in the induction machine [texte imprimé] / Khezzar, Abdelmalek, Auteur ; Kaikaa, Mohamed Yazid, Auteur ; El Kamel Oumaamar, Mohamed, Auteur . - pp. 4592 - 4605. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4592 - 4605 Mots-clés : Fault  diagnosis  Induction  motors  Motor  slots  Rotor  default  Unbalanced  supply Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper sheds light on the additional harmonic components arising from broken bars fault in the stator line current of an induction machine, which are generalized and analyzed in a different manner than of those given in the literature. Special attention is focused on the effect of both motor slots and rotor dissymmetry on the mechanism of the generation of the different harmonic components with consideration of the unbalance voltage supply and speed ripples effects. Aside from the well-known diagnosis signatures, new ones show up. The simulation and experimental results confirm the aforementioned study. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226610

The use of the instantaneous-reactive-power signature analysis for rotor-cage-fault diagnostics in three-phase induction motors / Drif, M'hamed in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4606 - 4614 Titre : The use of the instantaneous-reactive-power signature analysis for rotor-cage-fault diagnostics in three-phase induction motors Type de document : texte imprimé Auteurs : Drif, M'hamed, Auteur ; Cardoso, A. J. Marques, Auteur Article en page(s) : pp. 4606 - 4614 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Fault-severity  factor  Induction  motors  (IMs)  Instantaneous-reactive-power  signature  analysis  (IRPSA)  Rotor-cage-fault  diagnosis Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a new detection technique based on the instantaneous-reactive-power signature analysis is proposed for the diagnosis of rotor-cage faults (RCFs) in operating three-phase induction motors (IMs). This technique has been tested through the simulation of two different IMs using a mathematical model based on the winding-function approach. In order to demonstrate the capability of the proposed tool for rotor-condition monitoring, these simulations are complemented by the experimental results obtained from two IMs with several faulty rotors, powered from sinusoidal and nonsinusoidal supply voltages. The results obtained by the fast-Fourier-transform algorithm and the Welch method show the merits of the proposed approach for the detection of RCFs. A suitable fault-severity factor is also proposed as an indicator of the motor condition. Moreover, the inductive reactive effect of RCFs is underlined to demonstrate the effectiveness and convenience of this new technique for the diagnosis of RCFs in three-phase IMs. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5196746 [article] The use of the instantaneous-reactive-power signature analysis for rotor-cage-fault diagnostics in three-phase induction motors [texte imprimé] / Drif, M'hamed, Auteur ; Cardoso, A. J. Marques, Auteur . - pp. 4606 - 4614. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4606 - 4614 Mots-clés : Fault-severity  factor  Induction  motors  (IMs)  Instantaneous-reactive-power  signature  analysis  (IRPSA)  Rotor-cage-fault  diagnosis Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a new detection technique based on the instantaneous-reactive-power signature analysis is proposed for the diagnosis of rotor-cage faults (RCFs) in operating three-phase induction motors (IMs). This technique has been tested through the simulation of two different IMs using a mathematical model based on the winding-function approach. In order to demonstrate the capability of the proposed tool for rotor-condition monitoring, these simulations are complemented by the experimental results obtained from two IMs with several faulty rotors, powered from sinusoidal and nonsinusoidal supply voltages. The results obtained by the fast-Fourier-transform algorithm and the Welch method show the merits of the proposed approach for the detection of RCFs. A suitable fault-severity factor is also proposed as an indicator of the motor condition. Moreover, the inductive reactive effect of RCFs is underlined to demonstrate the effectiveness and convenience of this new technique for the diagnosis of RCFs in three-phase IMs. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5196746

A novel monitoring of load level and broken bar fault severity applied to squirrel-cage induction motors using a genetic algorithm / Razik, Hubert in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4615 - 4626 Titre : A novel monitoring of load level and broken bar fault severity applied to squirrel-cage induction motors using a genetic algorithm Type de document : texte imprimé Auteurs : Razik, Hubert, Auteur ; De Rossiter Correa, Mauricio Beltrao, Auteur ; Da Silva, Edison Roberto Cabral, Auteur Article en page(s) : pp. 4615 - 4626 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Diagnosis  Fuzzy  logic  Genetic  algorithm  (GA)  Induction  motors  Monitoring  Spectral  analysis Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper deals with the diagnostic of the signature of rotor broken bars when an induction machine is fed or not by an unbalanced line voltage. These signatures are given by the complex spectrum modulus of line current. In order to make the diagnostic, a genetic algorithm is used to keep the amplitude of all faulty lines. Moreover, a fuzzy logic approach allows us to conclude to the load level operating system and to inform the operator of the rotor fault severity. Several experimental results prove the performance of this method under various load levels and various fault severities. Notwithstanding, this approach requires a steady-state operating condition. The conclusion resulting from this paper is highlighted by experimental results which prove the efficiency of the suggested approach. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226598 [article] A novel monitoring of load level and broken bar fault severity applied to squirrel-cage induction motors using a genetic algorithm [texte imprimé] / Razik, Hubert, Auteur ; De Rossiter Correa, Mauricio Beltrao, Auteur ; Da Silva, Edison Roberto Cabral, Auteur . - pp. 4615 - 4626. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4615 - 4626 Mots-clés : Diagnosis  Fuzzy  logic  Genetic  algorithm  (GA)  Induction  motors  Monitoring  Spectral  analysis Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper deals with the diagnostic of the signature of rotor broken bars when an induction machine is fed or not by an unbalanced line voltage. These signatures are given by the complex spectrum modulus of line current. In order to make the diagnostic, a genetic algorithm is used to keep the amplitude of all faulty lines. Moreover, a fuzzy logic approach allows us to conclude to the load level operating system and to inform the operator of the rotor fault severity. Several experimental results prove the performance of this method under various load levels and various fault severities. Notwithstanding, this approach requires a steady-state operating condition. The conclusion resulting from this paper is highlighted by experimental results which prove the efficiency of the suggested approach. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226598

Analysis and diagnostics of adjacent and nonadjacent broken-rotor-bar faults in squirrel-cage induction machines / Sizov, Gennadi Y. in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4627 - 4641 Titre : Analysis and diagnostics of adjacent and nonadjacent broken-rotor-bar faults in squirrel-cage induction machines Type de document : texte imprimé Auteurs : Sizov, Gennadi Y., Auteur ; Sayed-Ahmed, Ahmed, Auteur ; Yeh, Chia-Chou, Auteur Article en page(s) : pp. 4627 - 4641 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Broken-rotor-bar  fault  Fault  diagnostics  Induction  motor  Magnetic  equivalent  circuit  (MEC)  modeling  Nonadjacent  rotor  faults Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, faults associated with the rotor of an induction machine are considered. More specifically, effects of adjacent and nonadjacent bar breakages on rotor fault diagnostics in squirrel-cage induction machines are studied. It is shown that some nonadjacent bar breakages may result in the masking of the commonly used fault indices and, hence, may lead to a possible misdiagnosis of the machine. A discussion of the possible scenarios of these breakages as well as some conclusions regarding the types of squirrel-cage induction machines (number of poles, number of squirrel-cage bars, etc.) that may be more prone to these nonadjacent types of failures are presented. This discussion is supported through both simulation and experimental results. It is also shown that secondary fault effects can be used to diagnose such nonadjacent bar breakages. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4738347 [article] Analysis and diagnostics of adjacent and nonadjacent broken-rotor-bar faults in squirrel-cage induction machines [texte imprimé] / Sizov, Gennadi Y., Auteur ; Sayed-Ahmed, Ahmed, Auteur ; Yeh, Chia-Chou, Auteur . - pp. 4627 - 4641. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4627 - 4641 Mots-clés : Broken-rotor-bar  fault  Fault  diagnostics  Induction  motor  Magnetic  equivalent  circuit  (MEC)  modeling  Nonadjacent  rotor  faults Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, faults associated with the rotor of an induction machine are considered. More specifically, effects of adjacent and nonadjacent bar breakages on rotor fault diagnostics in squirrel-cage induction machines are studied. It is shown that some nonadjacent bar breakages may result in the masking of the commonly used fault indices and, hence, may lead to a possible misdiagnosis of the machine. A discussion of the possible scenarios of these breakages as well as some conclusions regarding the types of squirrel-cage induction machines (number of poles, number of squirrel-cage bars, etc.) that may be more prone to these nonadjacent types of failures are presented. This discussion is supported through both simulation and experimental results. It is also shown that secondary fault effects can be used to diagnose such nonadjacent bar breakages. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4738347

Impaired-cooling-condition detection using DC-signal injection for soft-starter-connected induction motors / Zhang, Pinjia in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4642 - 4650 Titre : Impaired-cooling-condition detection using DC-signal injection for soft-starter-connected induction motors Type de document : texte imprimé Auteurs : Zhang, Pinjia, Auteur ; Du, Yi, Auteur ; Dai, Jing, Auteur Article en page(s) : pp. 4642 - 4650 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : AC  motor  protection  Cooling  Fault  diagnosis  Induction  motor  Resistance  measurement  Temperature  measurement  Thermal-variables  measurement  Thyristors Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper proposes a monitoring scheme to detect the state of the cooling capability for soft-starter-connected induction motors. Based on the estimated stator-winding temperature via dc-signal injection, the cooling capability of the motor can be monitored online using only voltage and current sensors. The thermal parameters of a simplified thermal model of the induction motor are identified using an extended Kalman filter approach, as an indication of the motor cooling capability. The proposed scheme can warn the users for proactive inspection and maintenance in the case of cooling-condition deterioration. The proposed method has been validated from experimental results under three different cooling conditions and variable-load conditions. The errors of thermal-parameter identification are within 3%. The proposed cooling-condition monitoring scheme, combined with the stator-winding-temperature monitoring scheme, can provide complete thermal protection for soft-starter-connected induction motors. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4895339 [article] Impaired-cooling-condition detection using DC-signal injection for soft-starter-connected induction motors [texte imprimé] / Zhang, Pinjia, Auteur ; Du, Yi, Auteur ; Dai, Jing, Auteur . - pp. 4642 - 4650. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4642 - 4650 Mots-clés : AC  motor  protection  Cooling  Fault  diagnosis  Induction  motor  Resistance  measurement  Temperature  measurement  Thermal-variables  measurement  Thyristors Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper proposes a monitoring scheme to detect the state of the cooling capability for soft-starter-connected induction motors. Based on the estimated stator-winding temperature via dc-signal injection, the cooling capability of the motor can be monitored online using only voltage and current sensors. The thermal parameters of a simplified thermal model of the induction motor are identified using an extended Kalman filter approach, as an indication of the motor cooling capability. The proposed scheme can warn the users for proactive inspection and maintenance in the case of cooling-condition deterioration. The proposed method has been validated from experimental results under three different cooling conditions and variable-load conditions. The errors of thermal-parameter identification are within 3%. The proposed cooling-condition monitoring scheme, combined with the stator-winding-temperature monitoring scheme, can provide complete thermal protection for soft-starter-connected induction motors. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4895339

Online and remote motor energy monitoring and fault diagnostics using wireless sensor networks / Bin Lu in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4651 - 4659 Titre : Online and remote motor energy monitoring and fault diagnostics using wireless sensor networks Type de document : texte imprimé Auteurs : Bin Lu, Auteur ; Gungor, Vehbi C., Auteur Article en page(s) : pp. 4651 - 4659 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Energy  efficiency  Fault  diagnostics  IEEE  202.15.4  Link-quality  indicator  (LQI)  Motor  current  signature  analysis  (MCSA)  Motor  power  signature  analysis  (MPSA)  Remote  monitoring  Wireless  sensor  networks  (WSNs) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper identifies the synergies between wireless sensor networks (WSNs) and nonintrusive electrical-signal-based motor signature analysis and proposes a scheme of applying WSNs in online and remote energy monitoring and fault diagnostics for industrial motor systems. The main scope is to provide a system overview where the nonintrusive nature of the electrical-signal-based motor signature analysis enables its applications in a WSN architecture. Special considerations in designing nonintrusive motor energy monitoring and fault diagnostic methods in such systems are discussed. This paper also provides detailed analyses to address the real-world challenges in designing and deploying WSNs in practice, including wireless-link-quality dynamics, noise and interference, and environmental impact on communication range and reliability. The overall system feasibility is investigated through a series of laboratory experiments and field tests. First, the concept of a remote and online energy monitoring and fault diagnostic system is demonstrated using a simplified star-type IEEE 802.15.4 compliant WSN in the laboratory. Two well-established nonintrusive motor diagnostic algorithms are intentionally used to prove the feasibility. Next, the challenges of applying the proposed WSN scheme in real industrial environments are analyzed experimentally using field test results. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5191094 [article] Online and remote motor energy monitoring and fault diagnostics using wireless sensor networks [texte imprimé] / Bin Lu, Auteur ; Gungor, Vehbi C., Auteur . - pp. 4651 - 4659. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4651 - 4659 Mots-clés : Energy  efficiency  Fault  diagnostics  IEEE  202.15.4  Link-quality  indicator  (LQI)  Motor  current  signature  analysis  (MCSA)  Motor  power  signature  analysis  (MPSA)  Remote  monitoring  Wireless  sensor  networks  (WSNs) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper identifies the synergies between wireless sensor networks (WSNs) and nonintrusive electrical-signal-based motor signature analysis and proposes a scheme of applying WSNs in online and remote energy monitoring and fault diagnostics for industrial motor systems. The main scope is to provide a system overview where the nonintrusive nature of the electrical-signal-based motor signature analysis enables its applications in a WSN architecture. Special considerations in designing nonintrusive motor energy monitoring and fault diagnostic methods in such systems are discussed. This paper also provides detailed analyses to address the real-world challenges in designing and deploying WSNs in practice, including wireless-link-quality dynamics, noise and interference, and environmental impact on communication range and reliability. The overall system feasibility is investigated through a series of laboratory experiments and field tests. First, the concept of a remote and online energy monitoring and fault diagnostic system is demonstrated using a simplified star-type IEEE 802.15.4 compliant WSN in the laboratory. Two well-established nonintrusive motor diagnostic algorithms are intentionally used to prove the feasibility. Next, the challenges of applying the proposed WSN scheme in real industrial environments are analyzed experimentally using field test results. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5191094

Current sensor fault-tolerant control for WECS with DFIG / Karimi, Shahram in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4660 - 4670 Titre : Current sensor fault-tolerant control for WECS with DFIG Type de document : texte imprimé Auteurs : Karimi, Shahram, Auteur ; Gaillard, Arnaud, Auteur ; Poure, Philippe, Auteur Article en page(s) : pp. 4660 - 4670 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Current  sensor  failure  Diagnosis  Failure  Field-programmable-gate-array  (FPGA)  Wind  energy Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The performances of wind energy conversion systems (WECS) heavily depend on the accurate current sensing. A sudden failure in one of the current sensors decreases the system performances. Moreover, if a fault is not detected and handled quickly, its effect leads to system disconnection. Hence, to reduce the failure rate and to prevent unscheduled shutdown, a real-time fault detection, isolation, and compensation scheme could be adopted. This paper introduces a new field-programmable-gate-array (FPGA)-based grid-side-converter current sensor fault-tolerant control for WECS with doubly fed induction generator. The proposed current sensor fault detection is achieved by a predictive model. ldquoFPGA-in-the-looprdquo and experimental results validate the effectiveness and satisfactory performances of the proposed method. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226611 [article] Current sensor fault-tolerant control for WECS with DFIG [texte imprimé] / Karimi, Shahram, Auteur ; Gaillard, Arnaud, Auteur ; Poure, Philippe, Auteur . - pp. 4660 - 4670. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4660 - 4670 Mots-clés : Current  sensor  failure  Diagnosis  Failure  Field-programmable-gate-array  (FPGA)  Wind  energy Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The performances of wind energy conversion systems (WECS) heavily depend on the accurate current sensing. A sudden failure in one of the current sensors decreases the system performances. Moreover, if a fault is not detected and handled quickly, its effect leads to system disconnection. Hence, to reduce the failure rate and to prevent unscheduled shutdown, a real-time fault detection, isolation, and compensation scheme could be adopted. This paper introduces a new field-programmable-gate-array (FPGA)-based grid-side-converter current sensor fault-tolerant control for WECS with doubly fed induction generator. The proposed current sensor fault detection is achieved by a predictive model. ldquoFPGA-in-the-looprdquo and experimental results validate the effectiveness and satisfactory performances of the proposed method. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226611

Online model-based stator-fault detection and identification in induction motors / De Angelo, Cristian H. in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4671 - 4680 Titre : Online model-based stator-fault detection and identification in induction motors Type de document : texte imprimé Auteurs : De Angelo, Cristian H., Auteur ; Bossio, Guillermo R., Auteur ; Giaccone, Santiago J., Auteur Article en page(s) : pp. 4671 - 4680 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Detection  Identification  Induction  motors  (IMs)  Model  based  observer  Short  circuit  Stator  faults Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a model-based strategy for stator-interturn short-circuit detection on induction motors is presented. The proposed strategy is based on the generation of a vector of specific residual using a state observer. The vectorial residual is generated from a decomposition of the current estimation error. This allows for a fast detection of incipient faults, independently of the phase in which the fault occurs. Since the observer includes an adaptive scheme for rotor-speed estimation, the proposed scheme can be implemented for online monitoring, by measuring only stator voltages and currents. It is shown that the proposed strategy presents very low sensitivity to load variations and power-supply perturbations. Experimental results are included to show the ability of the proposed strategy for detecting incipient faults, including a low number of short-circuited turns and low fault current. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4752772 [article] Online model-based stator-fault detection and identification in induction motors [texte imprimé] / De Angelo, Cristian H., Auteur ; Bossio, Guillermo R., Auteur ; Giaccone, Santiago J., Auteur . - pp. 4671 - 4680. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4671 - 4680 Mots-clés : Detection  Identification  Induction  motors  (IMs)  Model  based  observer  Short  circuit  Stator  faults Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a model-based strategy for stator-interturn short-circuit detection on induction motors is presented. The proposed strategy is based on the generation of a vector of specific residual using a state observer. The vectorial residual is generated from a decomposition of the current estimation error. This allows for a fast detection of incipient faults, independently of the phase in which the fault occurs. Since the observer includes an adaptive scheme for rotor-speed estimation, the proposed scheme can be implemented for online monitoring, by measuring only stator voltages and currents. It is shown that the proposed strategy presents very low sensitivity to load variations and power-supply perturbations. Experimental results are included to show the ability of the proposed strategy for detecting incipient faults, including a low number of short-circuited turns and low fault current. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4752772

Open-transistor fault diagnostics in voltage-source inverters by analyzing the load currents / Sleszynski, Wojciech in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4681 - 4688 Titre : Open-transistor fault diagnostics in voltage-source inverters by analyzing the load currents Type de document : texte imprimé Auteurs : Sleszynski, Wojciech, Auteur ; Nieznanski, Janusz, Auteur ; Cichowski, Artur, Auteur Article en page(s) : pp. 4681 - 4688 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : AC  motor  drives  Fault  diagnosis  Pulsewidth  modulated  inverters Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : A novel method is presented for the detection and isolation of open-transistor faults in voltage-source inverters feeding AC motors. The method is an extension of the normalized DC-components method. The normalized average currents are combined with additional diagnostic variables which convey information about the percentage of time spent by the phase currents in the near-zero zone. The combined diagnostic signals permit much more robust diagnostics of single-transistor faults and make feasible the diagnostics of multiple-transistor faults. Suggested in this paper is also an alternative solution for the normalization of DC components, which is easier interpreted and simpler to implement. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5067311 [article] Open-transistor fault diagnostics in voltage-source inverters by analyzing the load currents [texte imprimé] / Sleszynski, Wojciech, Auteur ; Nieznanski, Janusz, Auteur ; Cichowski, Artur, Auteur . - pp. 4681 - 4688. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4681 - 4688 Mots-clés : AC  motor  drives  Fault  diagnosis  Pulsewidth  modulated  inverters Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : A novel method is presented for the detection and isolation of open-transistor faults in voltage-source inverters feeding AC motors. The method is an extension of the normalized DC-components method. The normalized average currents are combined with additional diagnostic variables which convey information about the percentage of time spent by the phase currents in the near-zero zone. The combined diagnostic signals permit much more robust diagnostics of single-transistor faults and make feasible the diagnostics of multiple-transistor faults. Suggested in this paper is also an alternative solution for the normalization of DC components, which is easier interpreted and simpler to implement. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5067311

Torsional vibration effects on induction machine current and torque signatures in gearbox-based electromechanical system / Kia, Shahin Hedayati in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4689 - 4699 Titre : Torsional vibration effects on induction machine current and torque signatures in gearbox-based electromechanical system Type de document : texte imprimé Auteurs : Kia, Shahin Hedayati, Auteur ; Henao, Humberto, Auteur ; Capolino, Gérard-André, Auteur Article en page(s) : pp. 4689 - 4699 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Condition  monitoring  Current  measurement  Frequency  domain  analysis  Frequency  tracking  Gearbox-based  system  Induction  machine  Mechanical  systems  Motor  current  signature  analysis  (MCSA)  Torque  estimation  Torque  oscillation Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The monitoring of heavy-duty electromechanical systems is crucial for their preventive maintenance planning. In these systems, the mechanical anomalies such as load troubles, great torque dynamic variations, and torsional oscillations lead to shaft fatigue and aging of other mechanical parts such as bearings and gearboxes. In this paper, a gearbox-based electromechanical system is investigated. Initially, a simple gearbox dynamic model is used to show the effects of rotating input, output, and mesh frequency components on the electromagnetic torque and consequently on the stator current signature. By this model, the influence of transmission error, eccentricities of pinion/wheel, and teeth contact stiffness variation is demonstrated for a healthy gearbox. Then, it is shown that the electrical machine can be considered as a torque sensor through electromagnetic torque estimation for torsional vibration monitoring without any extra mechanical sensor. A test-rig based on a 5.5-kW three-phase squirrel-cage induction motor connected to a wound-rotor 4-kW induction generator via a one-stage gearbox has been used to validate the proposed method. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5166501 [article] Torsional vibration effects on induction machine current and torque signatures in gearbox-based electromechanical system [texte imprimé] / Kia, Shahin Hedayati, Auteur ; Henao, Humberto, Auteur ; Capolino, Gérard-André, Auteur . - pp. 4689 - 4699. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4689 - 4699 Mots-clés : Condition  monitoring  Current  measurement  Frequency  domain  analysis  Frequency  tracking  Gearbox-based  system  Induction  machine  Mechanical  systems  Motor  current  signature  analysis  (MCSA)  Torque  estimation  Torque  oscillation Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The monitoring of heavy-duty electromechanical systems is crucial for their preventive maintenance planning. In these systems, the mechanical anomalies such as load troubles, great torque dynamic variations, and torsional oscillations lead to shaft fatigue and aging of other mechanical parts such as bearings and gearboxes. In this paper, a gearbox-based electromechanical system is investigated. Initially, a simple gearbox dynamic model is used to show the effects of rotating input, output, and mesh frequency components on the electromagnetic torque and consequently on the stator current signature. By this model, the influence of transmission error, eccentricities of pinion/wheel, and teeth contact stiffness variation is demonstrated for a healthy gearbox. Then, it is shown that the electrical machine can be considered as a torque sensor through electromagnetic torque estimation for torsional vibration monitoring without any extra mechanical sensor. A test-rig based on a 5.5-kW three-phase squirrel-cage induction motor connected to a wound-rotor 4-kW induction generator via a one-stage gearbox has been used to validate the proposed method. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5166501

Comparison between stator current and estimated mechanical speed for the detection of bearing wear in asynchronous drives / Trajin, Baptiste in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4700 - 4709 Titre : Comparison between stator current and estimated mechanical speed for the detection of bearing wear in asynchronous drives Type de document : texte imprimé Auteurs : Trajin, Baptiste, Auteur ; Regnier, Jeremi, Auteur ; Faucher, Jean, Auteur Article en page(s) : pp. 4700 - 4709 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Automatic  energy  extraction  Bearing  wear  Luenberger  speed  observer  Mechanical  analysis  Stator-current  spectral  analysis Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper deals with the detection of worn rolling bearings in asynchronous machines using electrical measurements and estimated mechanical variables. These two approaches are based on the use of the available electrical quantities, e.g., the machine stator currents, which are often already measured for control and protection purposes. Considering that bearing faults induce load-torque oscillations, a theoretical stator-current model, in case of load-torque oscillations, is recalled. Then, a theoretical estimated rotor flux and estimated speed model demonstrates the presence of harmonics related to load-torque oscillations. Phase-modulation components on stator current and harmonics on estimated speed can be used for detection purposes. The frequency behavior of monitored quantities with regard to the load-torque oscillation frequency is particularly investigated. Fault detectors are then proposed on monitored variables. The efficiency of the indicators is studied for different operating points considering the frequency behavior of the system. Finally, the use of detectors is discussed regarding the supply-frequency range usable for the detection. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5067302 [article] Comparison between stator current and estimated mechanical speed for the detection of bearing wear in asynchronous drives [texte imprimé] / Trajin, Baptiste, Auteur ; Regnier, Jeremi, Auteur ; Faucher, Jean, Auteur . - pp. 4700 - 4709. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4700 - 4709 Mots-clés : Automatic  energy  extraction  Bearing  wear  Luenberger  speed  observer  Mechanical  analysis  Stator-current  spectral  analysis Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper deals with the detection of worn rolling bearings in asynchronous machines using electrical measurements and estimated mechanical variables. These two approaches are based on the use of the available electrical quantities, e.g., the machine stator currents, which are often already measured for control and protection purposes. Considering that bearing faults induce load-torque oscillations, a theoretical stator-current model, in case of load-torque oscillations, is recalled. Then, a theoretical estimated rotor flux and estimated speed model demonstrates the presence of harmonics related to load-torque oscillations. Phase-modulation components on stator current and harmonics on estimated speed can be used for detection purposes. The frequency behavior of monitored quantities with regard to the load-torque oscillation frequency is particularly investigated. Fault detectors are then proposed on monitored variables. The efficiency of the indicators is studied for different operating points considering the frequency behavior of the system. Finally, the use of detectors is discussed regarding the supply-frequency range usable for the detection. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5067302

Detection of generalized-roughness bearing fault by spectral-kurtosis energy of vibration or current signals / Immovilli, Fabio in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4710 - 4717 Titre : Detection of generalized-roughness bearing fault by spectral-kurtosis energy of vibration or current signals Type de document : texte imprimé Auteurs : Immovilli, Fabio, Auteur ; Cocconcelli, Marco, Auteur ; Bellini, Alberto, Auteur Article en page(s) : pp. 4710 - 4717 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Bearings  Diagnostic  reasoning  Fault  detection  rotating-machine  mechanical  factors  Rough  surface  Signal  processing  Spectral  analysis  wear Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Generalized roughness is the most common damage occurring to rolling bearings. It produces a frequency spreading of the characteristic fault frequencies, thus making it difficult to detect with spectral or envelope analysis. A statistical analysis of typical bearing faults is proposed here in order to identify the spreading bandwidth related to specific conditions, relying on current or vibration measurements only. Then, a diagnostic index based on the computation of the energy in the previously defined bandwidth is used to diagnose bearing faults. The proposed method was validated experimentally with vibration signals, with robust and reliable results. The same procedure can be extended to current signals. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5089424 [article] Detection of generalized-roughness bearing fault by spectral-kurtosis energy of vibration or current signals [texte imprimé] / Immovilli, Fabio, Auteur ; Cocconcelli, Marco, Auteur ; Bellini, Alberto, Auteur . - pp. 4710 - 4717. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4710 - 4717 Mots-clés : Bearings  Diagnostic  reasoning  Fault  detection  rotating-machine  mechanical  factors  Rough  surface  Signal  processing  Spectral  analysis  wear Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Generalized roughness is the most common damage occurring to rolling bearings. It produces a frequency spreading of the characteristic fault frequencies, thus making it difficult to detect with spectral or envelope analysis. A statistical analysis of typical bearing faults is proposed here in order to identify the spreading bandwidth related to specific conditions, relying on current or vibration measurements only. Then, a diagnostic index based on the computation of the energy in the previously defined bandwidth is used to diagnose bearing faults. The proposed method was validated experimentally with vibration signals, with robust and reliable results. The same procedure can be extended to current signals. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5089424

Instantaneous-power harmonics as indexes for mixed eccentricity fault in mains-fed and open/closed-loop drive-connected squirrel-cage induction motors / Faiz, Jawad in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4718 - 4726 Titre : Instantaneous-power harmonics as indexes for mixed eccentricity fault in mains-fed and open/closed-loop drive-connected squirrel-cage induction motors Type de document : texte imprimé Auteurs : Faiz, Jawad, Auteur ; Ojaghi, Mansour, Auteur Article en page(s) : pp. 4718 - 4726 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Affecting  factors  Cage  induction  motor  Experimental  investigation  Instantaneous-power  harmonics  Mixed-eccentricity  index Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a comprehensive definition of eccentricity fault in cage induction motor is introduced, and instantaneous power is considered as eccentricity-fault index. In addition to the line current, the stator line voltage influences the instantaneous power of the motor; therefore, harmonics of this power can be employed as a fault-diagnosis index when the motor is supplied by a closed-loop control method. It is theoretically shown that the frequencies of harmonics of the instantaneous power due to mixed eccentricity fault are the same for the mains-fed and open/closed-loop drive-connected motors, although the number of factors affecting the amplitudes of the harmonics is relatively large when closed-loop drive connected. A flexible test rig is described, which was established to carry out various measurements on the eccentric motor with different eccentricity degrees, under different supply and control methods, varying load, and variable speeds. The experimental results indicate that the amplitudes of the dominant instantaneous-power harmonics depend on the degrees of mixed-eccentricity static and dynamic components, although these amplitudes are influenced by the supply methods, load level, and speed of the motor. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226609 [article] Instantaneous-power harmonics as indexes for mixed eccentricity fault in mains-fed and open/closed-loop drive-connected squirrel-cage induction motors [texte imprimé] / Faiz, Jawad, Auteur ; Ojaghi, Mansour, Auteur . - pp. 4718 - 4726. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4718 - 4726 Mots-clés : Affecting  factors  Cage  induction  motor  Experimental  investigation  Instantaneous-power  harmonics  Mixed-eccentricity  index Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a comprehensive definition of eccentricity fault in cage induction motor is introduced, and instantaneous power is considered as eccentricity-fault index. In addition to the line current, the stator line voltage influences the instantaneous power of the motor; therefore, harmonics of this power can be employed as a fault-diagnosis index when the motor is supplied by a closed-loop control method. It is theoretically shown that the frequencies of harmonics of the instantaneous power due to mixed eccentricity fault are the same for the mains-fed and open/closed-loop drive-connected motors, although the number of factors affecting the amplitudes of the harmonics is relatively large when closed-loop drive connected. A flexible test rig is described, which was established to carry out various measurements on the eccentric motor with different eccentricity degrees, under different supply and control methods, varying load, and variable speeds. The experimental results indicate that the amplitudes of the dominant instantaneous-power harmonics depend on the degrees of mixed-eccentricity static and dynamic components, although these amplitudes are influenced by the supply methods, load level, and speed of the motor. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226609

Static-, dynamic-, and mixed-eccentricity fault diagnoses in permanent-magnet synchronous motors / Ebrahimi, Bashir Mahdi in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4727 - 4739 Titre : Static-, dynamic-, and mixed-eccentricity fault diagnoses in permanent-magnet synchronous motors Type de document : texte imprimé Auteurs : Ebrahimi, Bashir Mahdi, Auteur ; Faiz, Jawad, Auteur ; Roshtkhari, Mehrsan Javan, Auteur Article en page(s) : pp. 4727 - 4739 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Amplitude  of  sidebandcomponents  (ASBC)  Artificial  neural  network  (ANN)  Dynamic  eccentricity  (DE)  and  mixed  eccentricity  (ME)  Fault  diagnosis  Gaussian  noise  Pattern  recognition  Permanent-magnet  (PM)  synchronous  motor  (PMSM)  Static  Time-stepping  finite-element  (FE)  method  (FEM)  (TSFEM) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Mixed-eccentricity (ME) fault diagnosis has not been so far documented for permanent-magnet (PM) synchronous motors (PMSMs). This paper investigates how the static eccentricity (SE), dynamic eccentricity (DE), and ME in three-phase PMSMs can be detected. A novel index for noninvasive diagnosis of these eccentricities is introduced for a faulty PMSM. The nominated index is the amplitude of sideband components with a particular frequency pattern which is extracted from the spectrum of stator current. Using this index makes it possible to determine the occurrence, as well as the type and percentage, of eccentricity precisely. Meanwhile, the current spectrum of the faulty PMSM during a large span is inspected, and the ability of the proposed index is exhibited to detect eccentricity in faulty PMSMs with different loads. A novel theoretical scrutiny based on a magnetic field analysis is presented to prove the introduced index and generalize the illustrated fault recognition method. To show the merit of this index in the eccentricity detection and estimation of its severity, first, the correlation between the index and the SE and DE degrees is determined. Then, the type of the eccentricity is determined by a k-nearest neighbor classifier. At the next step, a three-layer artificial neural network is employed to estimate the eccentricity degree and its type. After all, a white Gaussian noise is added to the simulated current, and the robustness of the proposed index is analyzed with respect to the noise variance. In this paper, the PMSM under magnetic fault (demagnetization) and electrical faults (short and open circuits) is modeled, and the current spectrum of the faulty PMSM under demagnetization, short circuit, and open circuit faults is analyzed. It is demonstrated that the proposed index, due to eccentricity fault, is not generated in the current spectrum due to magnetic and electrical faults. Indeed, it is exposed that the introduced index is only created due t- o eccentricity fault and it is not sensitive to other faults. To model the PMSM eccentricities, a time-stepping finite-element method, which takes into account all geometrical and physical characteristics of the machine components, nonuniform permeance of the air gap, and nonuniform characteristics of the PM material, is employed. This model facilitates the access to the demanded signals in order to have accurate processing. A comparison of simulation and experimental results validate the proposed index. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226595 [article] Static-, dynamic-, and mixed-eccentricity fault diagnoses in permanent-magnet synchronous motors [texte imprimé] / Ebrahimi, Bashir Mahdi, Auteur ; Faiz, Jawad, Auteur ; Roshtkhari, Mehrsan Javan, Auteur . - pp. 4727 - 4739. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4727 - 4739 Mots-clés : Amplitude  of  sidebandcomponents  (ASBC)  Artificial  neural  network  (ANN)  Dynamic  eccentricity  (DE)  and  mixed  eccentricity  (ME)  Fault  diagnosis  Gaussian  noise  Pattern  recognition  Permanent-magnet  (PM)  synchronous  motor  (PMSM)  Static  Time-stepping  finite-element  (FE)  method  (FEM)  (TSFEM) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Mixed-eccentricity (ME) fault diagnosis has not been so far documented for permanent-magnet (PM) synchronous motors (PMSMs). This paper investigates how the static eccentricity (SE), dynamic eccentricity (DE), and ME in three-phase PMSMs can be detected. A novel index for noninvasive diagnosis of these eccentricities is introduced for a faulty PMSM. The nominated index is the amplitude of sideband components with a particular frequency pattern which is extracted from the spectrum of stator current. Using this index makes it possible to determine the occurrence, as well as the type and percentage, of eccentricity precisely. Meanwhile, the current spectrum of the faulty PMSM during a large span is inspected, and the ability of the proposed index is exhibited to detect eccentricity in faulty PMSMs with different loads. A novel theoretical scrutiny based on a magnetic field analysis is presented to prove the introduced index and generalize the illustrated fault recognition method. To show the merit of this index in the eccentricity detection and estimation of its severity, first, the correlation between the index and the SE and DE degrees is determined. Then, the type of the eccentricity is determined by a k-nearest neighbor classifier. At the next step, a three-layer artificial neural network is employed to estimate the eccentricity degree and its type. After all, a white Gaussian noise is added to the simulated current, and the robustness of the proposed index is analyzed with respect to the noise variance. In this paper, the PMSM under magnetic fault (demagnetization) and electrical faults (short and open circuits) is modeled, and the current spectrum of the faulty PMSM under demagnetization, short circuit, and open circuit faults is analyzed. It is demonstrated that the proposed index, due to eccentricity fault, is not generated in the current spectrum due to magnetic and electrical faults. Indeed, it is exposed that the introduced index is only created due t- o eccentricity fault and it is not sensitive to other faults. To model the PMSM eccentricities, a time-stepping finite-element method, which takes into account all geometrical and physical characteristics of the machine components, nonuniform permeance of the air gap, and nonuniform characteristics of the PM material, is employed. This model facilitates the access to the demanded signals in order to have accurate processing. A comparison of simulation and experimental results validate the proposed index. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226595

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