Documents disponibles écrits par cet auteur

A control method for small utility connected large PV system to reduce frequency deviation using a minimal-order observer / Senjyu, Tomonobu in IEEE transactions on energy conversion, Vol. 24 N° 2 (Juin 2009) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 24 N° 2 (Juin 2009) . - pp. 520 - 528 Titre : A control method for small utility connected large PV system to reduce frequency deviation using a minimal-order observer Type de document : texte imprimé Auteurs : Senjyu, Tomonobu, Auteur ; Datta, Manoj, Auteur ; Yona, Atsushi, Auteur Année de publication : 2009 Article en page(s) : pp. 520 - 528 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Low-pass  filters;  observers;  photovoltaic  power  systems;  power  filters;  power  generation  control;  reduced  order  systems Résumé : In this paper, a minimal-order observer-based control method is proposed for small power utility connected photovoltaic (PV) systems. In the proposed method, the PV power is controlled according to load variation to minimize the frequency deviation. Load power and diesel power are estimated successfully by a minimal-order observer. From the estimated load power, load variation index is calculated. A second-order low-pass filter is used to produce PV base power from available maximum PV power. Then, the PV base power is added with the load variation index to generate the command PV power. The proposed method is compared with the method where maximum power point tracking control is used to produce the command PV power. From simulation results, it has been found that the proposed method is effective to reduce the frequency deviation of the utility and also delivers PV power near maximum PV power. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4957581&sortType%3Das [...] [article] A control method for small utility connected large PV system to reduce frequency deviation using a minimal-order observer [texte imprimé] / Senjyu, Tomonobu, Auteur ; Datta, Manoj, Auteur ; Yona, Atsushi, Auteur . - 2009 . - pp. 520 - 528. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 24 N° 2 (Juin 2009) . - pp. 520 - 528 Mots-clés : Low-pass  filters;  observers;  photovoltaic  power  systems;  power  filters;  power  generation  control;  reduced  order  systems Résumé : In this paper, a minimal-order observer-based control method is proposed for small power utility connected photovoltaic (PV) systems. In the proposed method, the PV power is controlled according to load variation to minimize the frequency deviation. Load power and diesel power are estimated successfully by a minimal-order observer. From the estimated load power, load variation index is calculated. A second-order low-pass filter is used to produce PV base power from available maximum PV power. Then, the PV base power is added with the load variation index to generate the command PV power. The proposed method is compared with the method where maximum power point tracking control is used to produce the command PV power. From simulation results, it has been found that the proposed method is effective to reduce the frequency deviation of the utility and also delivers PV power near maximum PV power. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4957581&sortType%3Das [...]

LQG design for megawatt-class WECS with DFIG based on functional models' fidelity prerequisites / Muhando, Endusa Billy in IEEE transactions on energy conversion, Vol. 24 N° 4 (Décembre 2009) 

Public ISBD [article]  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 [...]