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IEEE transactions on energy conversion |
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Ajouter le résultat dans votre panierComparison of a CFD analysis and a thermal equivalent circuit model of a TEFC induction machine with measurements / Kral, Christian in IEEE transactions on energy conversion, Vol. 24 N° 4 (Décembre 2009)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 809 - 818
Titre : Comparison of a CFD analysis and a thermal equivalent circuit model of a TEFC induction machine with measurements Type de document : texte imprimé Auteurs : Kral, Christian, Auteur ; Haumer, Anton, Auteur ; Haigis, Mathias, Auteur Année de publication : 2010 Article en page(s) : pp. 809 - 818 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Asynchronous machines; computational fluid dynamics; electric sensing devices; numerical analysis Résumé : For a totally enclosed fan-cooled induction machine, two methods of numerical analysis are compared with measurements. The first numerical method is based on computational fluid dynamics (CFDs) and the second one uses a thermal equivalent circuit (TEC). For the analysis based on CFD, a 3-D induction machine including housing is modeled. The numeric solution of the flow equations is determined for stationary temperature distributions. For the TEC, a discretized one-and-a-half-dimensional model of the induction machine is considered. With the TEC model, stationary and transient operating conditions can be simulated. Measurement results are determined by iron-copper-nickel sensors embedded in the stator winding and the housing, as well as by an IR sensor for measuring the rotor temperature. With these measurement signals, stationary and transient operating conditions can be analyzed. For stationary operating conditions, additionally, the housing temperatures are determined by an IR camera. The investigated simulation and measurement methods reveal different local and global temperatures, and thus, only certain aspects and characteristics of the obtained temperatures can be compared. Nevertheless, certain conclusions can be drawn from comparing these aspects considering the actual restrictions of each of the applied methods. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5291771&sortType%3Das [...] [article] Comparison of a CFD analysis and a thermal equivalent circuit model of a TEFC induction machine with measurements [texte imprimé] / Kral, Christian, Auteur ; Haumer, Anton, Auteur ; Haigis, Mathias, Auteur . - 2010 . - pp. 809 - 818.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 809 - 818
Mots-clés : Asynchronous machines; computational fluid dynamics; electric sensing devices; numerical analysis Résumé : For a totally enclosed fan-cooled induction machine, two methods of numerical analysis are compared with measurements. The first numerical method is based on computational fluid dynamics (CFDs) and the second one uses a thermal equivalent circuit (TEC). For the analysis based on CFD, a 3-D induction machine including housing is modeled. The numeric solution of the flow equations is determined for stationary temperature distributions. For the TEC, a discretized one-and-a-half-dimensional model of the induction machine is considered. With the TEC model, stationary and transient operating conditions can be simulated. Measurement results are determined by iron-copper-nickel sensors embedded in the stator winding and the housing, as well as by an IR sensor for measuring the rotor temperature. With these measurement signals, stationary and transient operating conditions can be analyzed. For stationary operating conditions, additionally, the housing temperatures are determined by an IR camera. The investigated simulation and measurement methods reveal different local and global temperatures, and thus, only certain aspects and characteristics of the obtained temperatures can be compared. Nevertheless, certain conclusions can be drawn from comparing these aspects considering the actual restrictions of each of the applied methods. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5291771&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 819 - 825
Titre : Efficiency improvements of switched reluctance motors with high-quality iron steel and enhanced conductor slot fill Type de document : texte imprimé Auteurs : Hayashi, Hiriaki, Auteur ; Nakamura, Kensaku, Auteur ; Chiba, Akira, Auteur Année de publication : 2010 Article en page(s) : pp. 819 - 825 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Iron alloys; reluctance motors; silicon alloys Résumé : In this paper, a comparison of efficiencies is put forward for a set of test machines constructed from several different types of low-loss magnetic steels. These are laminated amorphous alloys, 6.5% high silicon steel, and general-purpose low-loss silicon steel. Efficiency and characteristics are compared by experiment. The test switched reluctance motors are shown to have more than 95% efficiency at an output of about 2 kW. The effectiveness of an enhanced winding slot fill factor is also evaluated. The use of the high silicon steel is more practical at improving the efficiency as opposed to the use of increased slot fill factor. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5291770&sortType%3Das [...] [article] Efficiency improvements of switched reluctance motors with high-quality iron steel and enhanced conductor slot fill [texte imprimé] / Hayashi, Hiriaki, Auteur ; Nakamura, Kensaku, Auteur ; Chiba, Akira, Auteur . - 2010 . - pp. 819 - 825.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 819 - 825
Mots-clés : Iron alloys; reluctance motors; silicon alloys Résumé : In this paper, a comparison of efficiencies is put forward for a set of test machines constructed from several different types of low-loss magnetic steels. These are laminated amorphous alloys, 6.5% high silicon steel, and general-purpose low-loss silicon steel. Efficiency and characteristics are compared by experiment. The test switched reluctance motors are shown to have more than 95% efficiency at an output of about 2 kW. The effectiveness of an enhanced winding slot fill factor is also evaluated. The use of the high silicon steel is more practical at improving the efficiency as opposed to the use of increased slot fill factor. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5291770&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 826 - 834
Titre : Comparison of stator-mounted permanent-magnet machines based on a general power equation Type de document : texte imprimé Auteurs : Jianzhong Zhang, Auteur ; Ming Cheng, Auteur ; Zhe, Chen, Auteur Année de publication : 2010 Article en page(s) : pp. 826 - 834 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : permanent magnet machines Résumé : The stator-mounted permanent-magnet (SMPM) machines have some advantages compared with its counterparts, such as simple rotor, short winding terminals, and good thermal dissipation conditions for magnets. In this paper, a general power equation for three types of SMPM machine is introduced first, and then, power equations considering the specific topologies are derived. Based on these power equations, theoretical comparisons are carried out between various types of the SMPM machines. In all, eight topologies have been presented and benchmarked. It reveals that the flux switching permanent-magnet (PM) machine owns higher power density than the flux reversal PM machine and the doubly salient PM machine under same outer diameter. The comparison based on the power equation has established a foundation for optimizing the SMPM machines. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5291767&sortType%3Das [...] [article] Comparison of stator-mounted permanent-magnet machines based on a general power equation [texte imprimé] / Jianzhong Zhang, Auteur ; Ming Cheng, Auteur ; Zhe, Chen, Auteur . - 2010 . - pp. 826 - 834.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 826 - 834
Mots-clés : permanent magnet machines Résumé : The stator-mounted permanent-magnet (SMPM) machines have some advantages compared with its counterparts, such as simple rotor, short winding terminals, and good thermal dissipation conditions for magnets. In this paper, a general power equation for three types of SMPM machine is introduced first, and then, power equations considering the specific topologies are derived. Based on these power equations, theoretical comparisons are carried out between various types of the SMPM machines. In all, eight topologies have been presented and benchmarked. It reveals that the flux switching permanent-magnet (PM) machine owns higher power density than the flux reversal PM machine and the doubly salient PM machine under same outer diameter. The comparison based on the power equation has established a foundation for optimizing the SMPM machines. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5291767&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 835 - 840
Titre : Wear rates and current distribution of carbon brushes on steel slip rings Type de document : texte imprimé Auteurs : Skjlberg, Johan K., Auteur ; Ohma, Havar F., Auteur Année de publication : 2010 Article en page(s) : pp. 835 - 840 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Brushes; current distribution; hydroelectric generators; machine testing; wear Résumé : This paper deals with brush wear and current distribution of carbon brushes on steel slip rings. Measurements of brush wear and brush current have been carried out both in generators in service and in a laboratory test rig. Wear rates increase with increasing brush current only for positive brushes on-site, whereas an evident correlation between brush current and brush wear was found for both polarities in the laboratory. The magnetizing current is, in general, unevenly distributed between the brushes operating in parallel, and the current shifts between different brushes during operation. The current distribution becomes more uneven with increasing mean current density and with increasing circumferential velocity of the slip ring. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5336290&sortType%3Das [...] [article] Wear rates and current distribution of carbon brushes on steel slip rings [texte imprimé] / Skjlberg, Johan K., Auteur ; Ohma, Havar F., Auteur . - 2010 . - pp. 835 - 840.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 835 - 840
Mots-clés : Brushes; current distribution; hydroelectric generators; machine testing; wear Résumé : This paper deals with brush wear and current distribution of carbon brushes on steel slip rings. Measurements of brush wear and brush current have been carried out both in generators in service and in a laboratory test rig. Wear rates increase with increasing brush current only for positive brushes on-site, whereas an evident correlation between brush current and brush wear was found for both polarities in the laboratory. The magnetizing current is, in general, unevenly distributed between the brushes operating in parallel, and the current shifts between different brushes during operation. The current distribution becomes more uneven with increasing mean current density and with increasing circumferential velocity of the slip ring. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5336290&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 841 - 847
Titre : Analysis of a low-cost air-gap winding for permanent magnet synchronous motors Type de document : texte imprimé Auteurs : Oskar Wallmark, Auteur ; Kjellqvist, Peter, Auteur Année de publication : 2010 Article en page(s) : pp. 841 - 847 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Finite element analysis; permanent magnet motors; synchronous motors Résumé : This paper presents an analysis of a concentrated air-gap winding concept intended for low-cost, high-speed applications where the reduced winding construction cost can motivate its use. Expressions for magnet flux linkage, torque, winding inductance, and unbalanced magnetic pull are derived and compared, with good agreement, to measurements and results obtained from finite-element simulations. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5291774&sortType%3Das [...] [article] Analysis of a low-cost air-gap winding for permanent magnet synchronous motors [texte imprimé] / Oskar Wallmark, Auteur ; Kjellqvist, Peter, Auteur . - 2010 . - pp. 841 - 847.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 841 - 847
Mots-clés : Finite element analysis; permanent magnet motors; synchronous motors Résumé : This paper presents an analysis of a concentrated air-gap winding concept intended for low-cost, high-speed applications where the reduced winding construction cost can motivate its use. Expressions for magnet flux linkage, torque, winding inductance, and unbalanced magnetic pull are derived and compared, with good agreement, to measurements and results obtained from finite-element simulations. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5291774&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 848 - 859
Titre : Fault-tolerant soft starter control of induction motors with reduced transient torque pulsations Type de document : texte imprimé Auteurs : Yeh, Chia-Chou, Auteur ; Demerdash, Nabeel A. O., Auteur Année de publication : 2010 Article en page(s) : pp. 848 - 859 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Closed loop systems; fault tolerance; induction motors; machine control Résumé : Fault-tolerant operation of induction motors fed by soft starters when experiencing thyristor/silicon-controlled rectifier open-circuit or short-circuit switch fault is presented in this paper. The present low-cost fault mitigation solution can be easily retrofitted, without significant cost increase, into the existing off-the-shelf three-phase soft starters to enhance the reliability and fault-tolerant capability of such soft starter systems. In the event of either thyristor open-circuit or short-circuit switch fault in any one of the phases, the fault-tolerant soft starters are capable of operating in a two-phase control mode using a novel resilient closed-loop control scheme. The performance resulted from the present fault-tolerant soft starter control has demonstrated reduced motor starting transient torque pulsations as well as reduced motor inrush current magnitude. The present fault-tolerant approach is applicable to any soft starters that control small to large integral horsepower induction motors. Simulation results along with supporting experimental results for a 1.492-kW, 460-V, four-pole, three-phase induction motor are presented here to demonstrate the soundness and effectiveness of the present fault-tolerant approach. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5291768&sortType%3Das [...] [article] Fault-tolerant soft starter control of induction motors with reduced transient torque pulsations [texte imprimé] / Yeh, Chia-Chou, Auteur ; Demerdash, Nabeel A. O., Auteur . - 2010 . - pp. 848 - 859.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 848 - 859
Mots-clés : Closed loop systems; fault tolerance; induction motors; machine control Résumé : Fault-tolerant operation of induction motors fed by soft starters when experiencing thyristor/silicon-controlled rectifier open-circuit or short-circuit switch fault is presented in this paper. The present low-cost fault mitigation solution can be easily retrofitted, without significant cost increase, into the existing off-the-shelf three-phase soft starters to enhance the reliability and fault-tolerant capability of such soft starter systems. In the event of either thyristor open-circuit or short-circuit switch fault in any one of the phases, the fault-tolerant soft starters are capable of operating in a two-phase control mode using a novel resilient closed-loop control scheme. The performance resulted from the present fault-tolerant soft starter control has demonstrated reduced motor starting transient torque pulsations as well as reduced motor inrush current magnitude. The present fault-tolerant approach is applicable to any soft starters that control small to large integral horsepower induction motors. Simulation results along with supporting experimental results for a 1.492-kW, 460-V, four-pole, three-phase induction motor are presented here to demonstrate the soundness and effectiveness of the present fault-tolerant approach. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5291768&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 860 - 868
Titre : A synchronous current control scheme for multiphase induction motor drives Type de document : texte imprimé Auteurs : Jones, Martin, Auteur ; Vukosavic, Slobodan N., Auteur ; Dujic, Drazen, Auteur Année de publication : 2010 Article en page(s) : pp. 860 - 868 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Electric current control; induction motor drives; machine vector control Résumé : Rotor-flux-oriented control of multiphase induction machines with sinusoidal magnetomotive force (MMF) distribution can be realized theoretically by using only two current controllers in the synchronous reference frame. In practice, however, this is inadequate, as shown in this paper using experimental results collected from five-phase induction motor drive laboratory prototypes. Various asymmetries of the machine and nonideal nature of the inverter necessitate an appropriate modification of the current control scheme in the rotating reference frame. Such a modified current control scheme is developed in this paper, and its ability to provide operation of the machine with a practically perfectly sinusoidal and balanced system of five-phase currents is demonstrated experimentally. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5336288&sortType%3Das [...] [article] A synchronous current control scheme for multiphase induction motor drives [texte imprimé] / Jones, Martin, Auteur ; Vukosavic, Slobodan N., Auteur ; Dujic, Drazen, Auteur . - 2010 . - pp. 860 - 868.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 860 - 868
Mots-clés : Electric current control; induction motor drives; machine vector control Résumé : Rotor-flux-oriented control of multiphase induction machines with sinusoidal magnetomotive force (MMF) distribution can be realized theoretically by using only two current controllers in the synchronous reference frame. In practice, however, this is inadequate, as shown in this paper using experimental results collected from five-phase induction motor drive laboratory prototypes. Various asymmetries of the machine and nonideal nature of the inverter necessitate an appropriate modification of the current control scheme in the rotating reference frame. Such a modified current control scheme is developed in this paper, and its ability to provide operation of the machine with a practically perfectly sinusoidal and balanced system of five-phase currents is demonstrated experimentally. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5336288&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 869 - 874
Titre : Optimal slot opening width for magnetic noise reduction in induction motors Type de document : texte imprimé Auteurs : Jean Le Besnerais, Auteur ; Vincent Lanfranchi, Auteur ; Michel Hecquet, Auteur Année de publication : 2010 Article en page(s) : pp. 869 - 874 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Induction motors; magnetic noise Résumé : This paper presents a method to characterize the main magnetic force waves occurring in a sinusoidally fed induction machine. Three main force types are identified: slotting force waves, winding force waves, and saturation force waves. Slotting force waves are characterized in terms of number of nodes, velocity, propagation direction, and magnitude. On the ground of the expression of these forces magnitude, a method to cancel a given magnetic force wave by properly choosing the rotor slot or stator slot opening width is presented. This new method is validated with both simulations and experiments. Contrary to the common design rule that advices to decrease rotor and stator slot openings width in order to reduce magnetic noise, it is shown that a wider slot opening can lower the global noise level when properly chosen. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5306104&sortType%3Das [...] [article] Optimal slot opening width for magnetic noise reduction in induction motors [texte imprimé] / Jean Le Besnerais, Auteur ; Vincent Lanfranchi, Auteur ; Michel Hecquet, Auteur . - 2010 . - pp. 869 - 874.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 869 - 874
Mots-clés : Induction motors; magnetic noise Résumé : This paper presents a method to characterize the main magnetic force waves occurring in a sinusoidally fed induction machine. Three main force types are identified: slotting force waves, winding force waves, and saturation force waves. Slotting force waves are characterized in terms of number of nodes, velocity, propagation direction, and magnitude. On the ground of the expression of these forces magnitude, a method to cancel a given magnetic force wave by properly choosing the rotor slot or stator slot opening width is presented. This new method is validated with both simulations and experiments. Contrary to the common design rule that advices to decrease rotor and stator slot openings width in order to reduce magnetic noise, it is shown that a wider slot opening can lower the global noise level when properly chosen. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5306104&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 875 - 883
Titre : Grid synchronization of doubly-fed induction generator using integral variable structure control Type de document : texte imprimé Auteurs : Si Zhe, Chen, Auteur ; Cheung, Norbert C., Auteur ; Ka Chung, Wong, Auteur Année de publication : 2010 Article en page(s) : pp. 875 - 883 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Asynchronous generators; machine control; power conversion; variable structure systems; voltage control; wind power Résumé : This paper proposes a novel direct voltage control scheme, using integral variable structure control to synchronize a doubly fed induction generator (DFIG)-based wind energy conversion system (WECS) to the grid. The proposed scheme directly controls the stator terminal voltage of the DFIG to track the grid voltage without current control loop; hence, the structure of controller is simplified. The control scheme includes parametric uncertainty and external disturbances into the formed design procedure; hence, the proposed scheme has better robustness than existing synchronization methods. Both computer simulation and hardware implementation results are presented to demonstrate the advantages of the proposed scheme. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5291766&sortType%3Das [...] [article] Grid synchronization of doubly-fed induction generator using integral variable structure control [texte imprimé] / Si Zhe, Chen, Auteur ; Cheung, Norbert C., Auteur ; Ka Chung, Wong, Auteur . - 2010 . - pp. 875 - 883.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 875 - 883
Mots-clés : Asynchronous generators; machine control; power conversion; variable structure systems; voltage control; wind power Résumé : This paper proposes a novel direct voltage control scheme, using integral variable structure control to synchronize a doubly fed induction generator (DFIG)-based wind energy conversion system (WECS) to the grid. The proposed scheme directly controls the stator terminal voltage of the DFIG to track the grid voltage without current control loop; hence, the structure of controller is simplified. The control scheme includes parametric uncertainty and external disturbances into the formed design procedure; hence, the proposed scheme has better robustness than existing synchronization methods. Both computer simulation and hardware implementation results are presented to demonstrate the advantages of the proposed scheme. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5291766&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 884 - 892
Titre : Design of an adaptive PSS based on recurrent adaptive control theory Type de document : texte imprimé Auteurs : Peng, Zhao, Auteur ; Malik, O. P., Auteur Année de publication : 2010 Article en page(s) : pp. 884 - 892 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Adaptive control; neurocontrollers; power system control; power system stability; recurrent neural nets Résumé : Inspired by observing the similarity between adaptive control systems and recurrent neural networks (RNNs), a new control scheme, the recurrent adaptive control (RAC), is presented in this paper. Back propagation through time (BPTT), a learning algorithm for RNNs, can be exploited in RAC. Application of truncated BPTT to RAC is also discussed. Further, a new control algorithm for RAC, termed recursive gradient (RG), is developed to improve the performance of the original and truncated BPTT algorithms. Effectiveness of the RG control algorithm as a power system stabilizer is demonstrated. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5336285&sortType%3Das [...] [article] Design of an adaptive PSS based on recurrent adaptive control theory [texte imprimé] / Peng, Zhao, Auteur ; Malik, O. P., Auteur . - 2010 . - pp. 884 - 892.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 884 - 892
Mots-clés : Adaptive control; neurocontrollers; power system control; power system stability; recurrent neural nets Résumé : Inspired by observing the similarity between adaptive control systems and recurrent neural networks (RNNs), a new control scheme, the recurrent adaptive control (RAC), is presented in this paper. Back propagation through time (BPTT), a learning algorithm for RNNs, can be exploited in RAC. Application of truncated BPTT to RAC is also discussed. Further, a new control algorithm for RAC, termed recursive gradient (RG), is developed to improve the performance of the original and truncated BPTT algorithms. Effectiveness of the RG control algorithm as a power system stabilizer is demonstrated. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5336285&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 893 - 904
Titre : LQG design for megawatt-class WECS with DFIG based on functional models' fidelity prerequisites Type de document : texte imprimé Auteurs : Muhando, Endusa Billy, Auteur ; Senjyu, Tomonobu, Auteur ; Uehara, Aki, Auteur Année de publication : 2010 Article en page(s) : pp. 893 - 904 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Asynchronous generators; control system synthesis; direct energy conversion; electric current control; frequency control; linear quadratic Gaussian control; machine control; power generation control; torque control; voltage control; wind turbines Résumé : With the increasing trend of connecting high penetrations of wind energy conversion systems (WECSs) to the transmission networks comes the challenge of updating the grid code for the connection of megawatt-class wind turbines. Starting with each WECS entity in the wind farm, the specifications would require the ability to complement some of the power system control services-voltage and frequency control-currently carried out by conventional synchronous generation. This paper investigates output power stability of a WECS in a highly fluctuating wind environment. Based on a performability model, a control strategy is devised for maximizing energy conversion in low to medium winds, and maintaining rated output in above rated winds while keeping torsional torque fluctuations to a minimum. Control is exercised via collective blade pitch control as well as generator torque control. The fundamental philosophy behind the proposed control strategy for the wind turbine coupled to an asynchronous doubly fed induction generator is general and can be easily extended to other WECS configurations. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5291769&sortType%3Das [...] [article] LQG design for megawatt-class WECS with DFIG based on functional models' fidelity prerequisites [texte imprimé] / Muhando, Endusa Billy, Auteur ; Senjyu, Tomonobu, Auteur ; Uehara, Aki, Auteur . - 2010 . - pp. 893 - 904.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 893 - 904
Mots-clés : Asynchronous generators; control system synthesis; direct energy conversion; electric current control; frequency control; linear quadratic Gaussian control; machine control; power generation control; torque control; voltage control; wind turbines Résumé : With the increasing trend of connecting high penetrations of wind energy conversion systems (WECSs) to the transmission networks comes the challenge of updating the grid code for the connection of megawatt-class wind turbines. Starting with each WECS entity in the wind farm, the specifications would require the ability to complement some of the power system control services-voltage and frequency control-currently carried out by conventional synchronous generation. This paper investigates output power stability of a WECS in a highly fluctuating wind environment. Based on a performability model, a control strategy is devised for maximizing energy conversion in low to medium winds, and maintaining rated output in above rated winds while keeping torsional torque fluctuations to a minimum. Control is exercised via collective blade pitch control as well as generator torque control. The fundamental philosophy behind the proposed control strategy for the wind turbine coupled to an asynchronous doubly fed induction generator is general and can be easily extended to other WECS configurations. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5291769&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 905 - 915
Titre : Reinforced control and operation of DFIG-based wind-power-generation system under unbalanced grid voltage conditions Type de document : texte imprimé Auteurs : Jiabing Hu, Auteur ; Yikang, He, Auteur Année de publication : 2010 Article en page(s) : pp. 905 - 915 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Asynchronous machines; machine control; power generation control; wind power Résumé : This paper proposes an enhanced control and operation of a doubly fed induction generator (DFIG) based wind power generation system under unbalanced grid voltage conditions. System behaviors of grid-side and rotor-side converters (GSCs and RSCs) are described. The RSC is controlled to eliminate the electromagnetic torque oscillation at double the grid frequency. Meanwhile, three selective control targets for the GSC, i.e., reducing the pulsations in the total active or reactive power, or unbalanced current outputs from the overall system, are identified and analyzed during voltage imbalance. A new current-control scheme is presented for the GSC and RSC without involving the decomposing of positive and negative sequence currents. The controller consists of a proportional (P) regulator and a resonant (R) one tuned at the grid frequency, which is implemented in the stator stationary reference frame. Finally, simulation studies are carried out on a 1.5-MW wind-turbine-driven DFIG system. The validity of the presented current controller and the feasibility of the proposed control targets are all confirmed by the simulated results. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5336284&sortType%3Das [...] [article] Reinforced control and operation of DFIG-based wind-power-generation system under unbalanced grid voltage conditions [texte imprimé] / Jiabing Hu, Auteur ; Yikang, He, Auteur . - 2010 . - pp. 905 - 915.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 905 - 915
Mots-clés : Asynchronous machines; machine control; power generation control; wind power Résumé : This paper proposes an enhanced control and operation of a doubly fed induction generator (DFIG) based wind power generation system under unbalanced grid voltage conditions. System behaviors of grid-side and rotor-side converters (GSCs and RSCs) are described. The RSC is controlled to eliminate the electromagnetic torque oscillation at double the grid frequency. Meanwhile, three selective control targets for the GSC, i.e., reducing the pulsations in the total active or reactive power, or unbalanced current outputs from the overall system, are identified and analyzed during voltage imbalance. A new current-control scheme is presented for the GSC and RSC without involving the decomposing of positive and negative sequence currents. The controller consists of a proportional (P) regulator and a resonant (R) one tuned at the grid frequency, which is implemented in the stator stationary reference frame. Finally, simulation studies are carried out on a 1.5-MW wind-turbine-driven DFIG system. The validity of the presented current controller and the feasibility of the proposed control targets are all confirmed by the simulated results. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5336284&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 916 - 925
Titre : A statistical approach to the design of a dispatchable wind power-battery energy storage system Type de document : texte imprimé Auteurs : Yao, D. L., Auteur ; Choi, S. S., Auteur ; Tseng, K. J., Auteur Année de publication : 2010 Article en page(s) : pp. 916 - 925 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Secondary cells; wind power Résumé : A scheme that allows the dispatch of steady and controllable level of power from a wind power generating station is proposed in this paper. The scheme utilizes two battery energy storage systems (BESSs) in which the generated wind power is used to charge one BESS, while the second BESS is used to discharge constant power into grid. The role of the two BESS interchanges when the discharging BESS reaches specified operating limit. With this scheme in mind and based on given wind speed statistics, charging characteristics of the BESS are studied, and a method to determine the expected charging time of the BESS to reach stipulated battery state of charge is developed. The expected BESS charging time, in turn, dictates the constant power level that can be dispatched to the grid through the discharging BESS. The corresponding discharge time is also determined using the developed method, the accuracy of which is validated experimentally. The proposed design procedure is then used to determine the minimum BESS capacity based on the expected wind power. Statistical likelihood of dispatchable power delivery achievable from the scheme is also obtained. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5336289&sortType%3Das [...] [article] A statistical approach to the design of a dispatchable wind power-battery energy storage system [texte imprimé] / Yao, D. L., Auteur ; Choi, S. S., Auteur ; Tseng, K. J., Auteur . - 2010 . - pp. 916 - 925.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 916 - 925
Mots-clés : Secondary cells; wind power Résumé : A scheme that allows the dispatch of steady and controllable level of power from a wind power generating station is proposed in this paper. The scheme utilizes two battery energy storage systems (BESSs) in which the generated wind power is used to charge one BESS, while the second BESS is used to discharge constant power into grid. The role of the two BESS interchanges when the discharging BESS reaches specified operating limit. With this scheme in mind and based on given wind speed statistics, charging characteristics of the BESS are studied, and a method to determine the expected charging time of the BESS to reach stipulated battery state of charge is developed. The expected BESS charging time, in turn, dictates the constant power level that can be dispatched to the grid through the discharging BESS. The corresponding discharge time is also determined using the developed method, the accuracy of which is validated experimentally. The proposed design procedure is then used to determine the minimum BESS capacity based on the expected wind power. Statistical likelihood of dispatchable power delivery achievable from the scheme is also obtained. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5336289&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 926 - 934
Titre : Strategies for operating wind power in a similar manner of conventional power plant Type de document : texte imprimé Auteurs : Le-Ren, Chang-Chien, Auteur ; Yao-Ching, Yin, Auteur Année de publication : 2010 Article en page(s) : pp. 926 - 934 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Asynchronous generators; power control; wind power plants; wind turbines Résumé : As installed capacity of wind power retains a significant proportion of generation mix in the electric system, operators have the increasing expectation that wind turbines should function in some ways similar to the conventional plants. In addition to some basic capabilities to regulate reactive power for voltage support, the counterpart in active power control is also the major concern. This paper presents a control strategy to regulate active power for doubly fed induction generator under various operating conditions. Testing results showing the control performance in the simulated conditions validate the feasibility of the operation in power dispatch upon operator's request, and maintain stability under variant wind speed. Additionally, supplemental functions in generation margin assessment, in spinning reserve support, and in governor droop are presented to make the wind farm operation more like a conventional power plant. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5233902&sortType%3Das [...] [article] Strategies for operating wind power in a similar manner of conventional power plant [texte imprimé] / Le-Ren, Chang-Chien, Auteur ; Yao-Ching, Yin, Auteur . - 2010 . - pp. 926 - 934.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 926 - 934
Mots-clés : Asynchronous generators; power control; wind power plants; wind turbines Résumé : As installed capacity of wind power retains a significant proportion of generation mix in the electric system, operators have the increasing expectation that wind turbines should function in some ways similar to the conventional plants. In addition to some basic capabilities to regulate reactive power for voltage support, the counterpart in active power control is also the major concern. This paper presents a control strategy to regulate active power for doubly fed induction generator under various operating conditions. Testing results showing the control performance in the simulated conditions validate the feasibility of the operation in power dispatch upon operator's request, and maintain stability under variant wind speed. Additionally, supplemental functions in generation margin assessment, in spinning reserve support, and in governor droop are presented to make the wind farm operation more like a conventional power plant. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5233902&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 935 - 942
Titre : Clustering of wind farms and its sizing impact Type de document : texte imprimé Auteurs : Banakar, Hadi, Auteur ; Ooi, Boon Teck, Auteur Année de publication : 2010 Article en page(s) : pp. 935 - 942 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Statistical analysis; wind power plants Résumé : The problem of establishing maximum size of a wind farm (WF) when it joins a WF cluster (WFC) is examined. It is shown that the clustering effect can be quantified by detailed simulation of system dynamics, using appropriate models for wind events, wind facilities, and power system equipment. The paper points out the inevitability of WFC formations and draws attention to their operational impacts. A case study is used to demonstrate how location and layout of a WF can influence system dynamics, and thus, restrict the WF size. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5336287&sortType%3Das [...] [article] Clustering of wind farms and its sizing impact [texte imprimé] / Banakar, Hadi, Auteur ; Ooi, Boon Teck, Auteur . - 2010 . - pp. 935 - 942.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 935 - 942
Mots-clés : Statistical analysis; wind power plants Résumé : The problem of establishing maximum size of a wind farm (WF) when it joins a WF cluster (WFC) is examined. It is shown that the clustering effect can be quantified by detailed simulation of system dynamics, using appropriate models for wind events, wind facilities, and power system equipment. The paper points out the inevitability of WFC formations and draws attention to their operational impacts. A case study is used to demonstrate how location and layout of a WF can influence system dynamics, and thus, restrict the WF size. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5336287&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 943 - 949
Titre : Power modulation of photovoltaic generator for frequency control of power system Type de document : texte imprimé Auteurs : Nagaoka, Naoto, Auteur ; Takayama, Satoshi, Auteur ; Satoh, Hiroyuki, Auteur Année de publication : 2010 Article en page(s) : pp. 943 - 949 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Frequency control; photovoltaic power systems; power system control Résumé : This paper describes power modulation of a photovoltaic (PV) generator for frequency regulation. The generator has a small electric double-layer capacitor. The capacitor absorbs rapid fluctuations of PV generation, and allows the generator to change its output at a limited ramp rate. The capacitor voltage is kept at a specified value to maintain adequate energy storage. The generator output is modulated in proportion to the frequency deviation. The responses to step and periodic changes of the frequency are examined. The voltage control is modified so as not to affect the frequency control. It is shown by numerical simulations that the PV generator cooperates well with conventional generators. Some experimental results are demonstrated to validate the proposed method. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5233921&sortType%3Das [...] [article] Power modulation of photovoltaic generator for frequency control of power system [texte imprimé] / Nagaoka, Naoto, Auteur ; Takayama, Satoshi, Auteur ; Satoh, Hiroyuki, Auteur . - 2010 . - pp. 943 - 949.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 943 - 949
Mots-clés : Frequency control; photovoltaic power systems; power system control Résumé : This paper describes power modulation of a photovoltaic (PV) generator for frequency regulation. The generator has a small electric double-layer capacitor. The capacitor absorbs rapid fluctuations of PV generation, and allows the generator to change its output at a limited ramp rate. The capacitor voltage is kept at a specified value to maintain adequate energy storage. The generator output is modulated in proportion to the frequency deviation. The responses to step and periodic changes of the frequency are examined. The voltage control is modified so as not to affect the frequency control. It is shown by numerical simulations that the PV generator cooperates well with conventional generators. Some experimental results are demonstrated to validate the proposed method. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5233921&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 950 - 958
Titre : Optimal sizing for a gas-fired grid-connected cogeneration system planning Type de document : texte imprimé Auteurs : Azit, Abu Hanifa, Auteur ; Nor, Khalid Mohamed, Auteur Année de publication : 2010 Article en page(s) : pp. 950 - 958 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Newton-Raphson method; cogeneration; gas turbines; integer programming; nonlinear programming; power generation planning; power grids; turbogenerators Résumé : This paper presents an optimization approach to determine the optimal sizing for a gas-fired grid-connected cogeneration system planning. An absorption chiller and a thermal storage system are included as part of the cogeneration system configuration. The optimization uses a mixed-integer nonlinear optimization technique to size the system. The search for the minimum operational cost uses a Newton-Raphson and conjugate method with tangent estimates and forward derivatives. In certain cases, the approach uses dynamic programming principle to decide on the best feasible practical solution. The electrical and thermal outputs from the turbogenerator are modeled by taking into account partial loading. The annual facility load is represented by a week of hourly load. The optimization variables used are the one week of hourly electrical energy output from the turbogenerator and the optimum solution is determined by minimizing the total operational cost. The paper evaluates three case studies of different types of load characteristic (hospital, university campus, and paper mill) to demonstrate the capabilities of the proposed model. The optimum size of the whole system will be presented. The paper will also present the financial analysis of the optimum system. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5233879&sortType%3Das [...] [article] Optimal sizing for a gas-fired grid-connected cogeneration system planning [texte imprimé] / Azit, Abu Hanifa, Auteur ; Nor, Khalid Mohamed, Auteur . - 2010 . - pp. 950 - 958.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 950 - 958
Mots-clés : Newton-Raphson method; cogeneration; gas turbines; integer programming; nonlinear programming; power generation planning; power grids; turbogenerators Résumé : This paper presents an optimization approach to determine the optimal sizing for a gas-fired grid-connected cogeneration system planning. An absorption chiller and a thermal storage system are included as part of the cogeneration system configuration. The optimization uses a mixed-integer nonlinear optimization technique to size the system. The search for the minimum operational cost uses a Newton-Raphson and conjugate method with tangent estimates and forward derivatives. In certain cases, the approach uses dynamic programming principle to decide on the best feasible practical solution. The electrical and thermal outputs from the turbogenerator are modeled by taking into account partial loading. The annual facility load is represented by a week of hourly load. The optimization variables used are the one week of hourly electrical energy output from the turbogenerator and the optimum solution is determined by minimizing the total operational cost. The paper evaluates three case studies of different types of load characteristic (hospital, university campus, and paper mill) to demonstrate the capabilities of the proposed model. The optimum size of the whole system will be presented. The paper will also present the financial analysis of the optimum system. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5233879&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 959 - 971
Titre : Methodology for smooth connection of doubly fed induction generators to the grid Type de document : texte imprimé Auteurs : Tapia, Gerardo, Auteur ; Santamaria, Giovanna, Auteur Année de publication : 2010 Article en page(s) : pp. 959 - 971 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : PI control; asynchronous generators; electric current control; machine vector control; power generation control; power grids; rotors; synchronisation; voltage control; wind turbines Résumé : A systematic methodology for smooth connection of wind-turbine-driven doubly fed induction generators (DFIGs) to the grid is presented. Synchronization of the voltage induced in the DFIG open stator to that of the grid, which needs to be accomplished prior to connection, is thoroughly examined. A particular grid-voltage-oriented rotor control scheme is considered for this purpose. Generic tuning equations for the rotor current integral-proportional (I-P) controllers involved in this scheme are also derived. Transition between the control configurations devoted to synchronization and normal operation-active power generation and reactive power interchange with the grid-at the instant of connection is studied in detail. Mainly due to the reference frame selected for synchronization, the greater part of this transition takes place naturally. However, given that the rotor current dynamics vary significantly depending on whether the DFIG stator is connected to the grid or not, the parameters of the I-P controllers involved in both schemes will accordingly be different. Consequently, a ldquobumplessrdquo strategy is provided that preserves the smoothness of the connection. A simple method for initial rotor positioning, required when performing vector control based on an incremental encoder, is also suggested. The resulting overall methodology is validated on a 7-kW DFIG-based laboratory-scale test bench. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5291775&sortType%3Das [...] [article] Methodology for smooth connection of doubly fed induction generators to the grid [texte imprimé] / Tapia, Gerardo, Auteur ; Santamaria, Giovanna, Auteur . - 2010 . - pp. 959 - 971.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 959 - 971
Mots-clés : PI control; asynchronous generators; electric current control; machine vector control; power generation control; power grids; rotors; synchronisation; voltage control; wind turbines Résumé : A systematic methodology for smooth connection of wind-turbine-driven doubly fed induction generators (DFIGs) to the grid is presented. Synchronization of the voltage induced in the DFIG open stator to that of the grid, which needs to be accomplished prior to connection, is thoroughly examined. A particular grid-voltage-oriented rotor control scheme is considered for this purpose. Generic tuning equations for the rotor current integral-proportional (I-P) controllers involved in this scheme are also derived. Transition between the control configurations devoted to synchronization and normal operation-active power generation and reactive power interchange with the grid-at the instant of connection is studied in detail. Mainly due to the reference frame selected for synchronization, the greater part of this transition takes place naturally. However, given that the rotor current dynamics vary significantly depending on whether the DFIG stator is connected to the grid or not, the parameters of the I-P controllers involved in both schemes will accordingly be different. Consequently, a ldquobumplessrdquo strategy is provided that preserves the smoothness of the connection. A simple method for initial rotor positioning, required when performing vector control based on an incremental encoder, is also suggested. The resulting overall methodology is validated on a 7-kW DFIG-based laboratory-scale test bench. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5291775&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 972 - 982
Titre : Small-signal stability analysis of a DFIG-based wind power system under different modes of operation Type de document : texte imprimé Auteurs : Mishra, Yateendra, Auteur ; S. Mishra, Auteur ; Fangxing, Li, Auteur Année de publication : 2010 Article en page(s) : pp. 972 - 982 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Asynchronous generators; damping; robust control; wind power Résumé : This paper focuses on the super/subsynchronous operation of the doubly fed induction generator (DFIG) system. The impact of a damping controller on the different modes of operation for the DFIG-based wind generation system is investigated. The coordinated tuning of the damping controller to enhance the damping of the oscillatory modes using bacteria foraging technique is presented. The results from eigenvalue analysis are presented to elucidate the effectiveness of the tuned damping controller in the DFIG system. The robustness issue of the damping controller is also investigated. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5308249&sortType%3Das [...] [article] Small-signal stability analysis of a DFIG-based wind power system under different modes of operation [texte imprimé] / Mishra, Yateendra, Auteur ; S. Mishra, Auteur ; Fangxing, Li, Auteur . - 2010 . - pp. 972 - 982.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 972 - 982
Mots-clés : Asynchronous generators; damping; robust control; wind power Résumé : This paper focuses on the super/subsynchronous operation of the doubly fed induction generator (DFIG) system. The impact of a damping controller on the different modes of operation for the DFIG-based wind generation system is investigated. The coordinated tuning of the damping controller to enhance the damping of the oscillatory modes using bacteria foraging technique is presented. The results from eigenvalue analysis are presented to elucidate the effectiveness of the tuned damping controller in the DFIG system. The robustness issue of the damping controller is also investigated. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5308249&sortType%3Das [...]
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 983 - 985
Titre : Nighttime application of PV solar farm as STATCOM to regulate grid voltage Type de document : texte imprimé Auteurs : Varma, Rajiv K., Auteur ; Khadkikar, Vinod, Auteur Année de publication : 2010 Article en page(s) : pp. 983 - 985 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Fault diagnosis; photovoltaic power systems; power transmission control; solar power stations; static VAr compensators; voltage control; wind power plants Résumé : This letter presents a novel concept of utilizing photovoltaic (PV) solar farm (SF) as a flexible ac transmission systems controller-static synchronous compensator, to regulate the point of common coupling voltage during nighttime when the SF is not producing any active power. This concept, although general, is presented for the scenario of a distribution feeder, which has both PV solar and wind farms connected to it. The proposed control will enable increased connections of renewable energy sources in the grid. A MATLAB/Simulink-based simulation study is presented under variable wind power generation and fault condition to validate the proposed concept. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5336286&sortType%3Das [...] [article] Nighttime application of PV solar farm as STATCOM to regulate grid voltage [texte imprimé] / Varma, Rajiv K., Auteur ; Khadkikar, Vinod, Auteur . - 2010 . - pp. 983 - 985.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 983 - 985
Mots-clés : Fault diagnosis; photovoltaic power systems; power transmission control; solar power stations; static VAr compensators; voltage control; wind power plants Résumé : This letter presents a novel concept of utilizing photovoltaic (PV) solar farm (SF) as a flexible ac transmission systems controller-static synchronous compensator, to regulate the point of common coupling voltage during nighttime when the SF is not producing any active power. This concept, although general, is presented for the scenario of a distribution feeder, which has both PV solar and wind farms connected to it. The proposed control will enable increased connections of renewable energy sources in the grid. A MATLAB/Simulink-based simulation study is presented under variable wind power generation and fault condition to validate the proposed concept. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5336286&sortType%3Das [...]
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