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Harmonic analysis of a DFIG for a wind energy conversion system / Lingling Fan in IEEE transactions on energy conversion, Vol. 25 N° 1 (Mars 2010) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 25 N° 1 (Mars 2010) . - pp. 181 - 190 Titre : Harmonic analysis of a DFIG for a wind energy conversion system Type de document : texte imprimé Auteurs : Lingling Fan, Auteur ; Yuvarajan, S., Auteur ; Kavasseri, R., Auteur Année de publication : 2010 Article en page(s) : pp. 181 - 190 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : asynchronous  generators;  direct  energy  conversion;  equivalent  circuits;  harmonic  analysis;  machine  theory;  wind  power  plants Résumé : This paper develops a framework for analysis of harmonics in a doubly fed induction generator (DFIG) caused by nonsinusoidal conditions in rotor and unbalance in stator. Nonsinusoidal rotor voltages are decomposed into harmonic components and their corresponding sequences are identified. Induced harmonics in stator are analyzed and computed, from which the torques produced by these interactions between stator and rotor harmonic components can be found. During unbalanced stator conditions, symmetric component theory is applied to the stator voltage to get positive-, negative-, and zero-sequence components of stator and rotor currents. The steady-state negative-sequence equivalent circuit for a DFIG is derived based on the reference frame theory. Harmonic currents in the rotor are computed based on the sequence circuits. In both scenarios, the harmonic components of the electromagnetic torque are calculated from the interactions of the harmonic components of the stator and rotor currents. Three case studies are considered, namely: 1) nonsinusoidal rotor injection; 2) an isolated unbalanced stator load scenario; and 3) unbalanced grid-connected operation. The analysis is verified with results from numerical simulations in Matlab/Simulink. For illustration, the second case is verified using experiments. The simulation results and experimental results agree well with the results from analysis. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5340615&sortType%3Das [...] [article] Harmonic analysis of a DFIG for a wind energy conversion system [texte imprimé] / Lingling Fan, Auteur ; Yuvarajan, S., Auteur ; Kavasseri, R., Auteur . - 2010 . - pp. 181 - 190. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25 N° 1 (Mars 2010) . - pp. 181 - 190 Mots-clés : asynchronous  generators;  direct  energy  conversion;  equivalent  circuits;  harmonic  analysis;  machine  theory;  wind  power  plants Résumé : This paper develops a framework for analysis of harmonics in a doubly fed induction generator (DFIG) caused by nonsinusoidal conditions in rotor and unbalance in stator. Nonsinusoidal rotor voltages are decomposed into harmonic components and their corresponding sequences are identified. Induced harmonics in stator are analyzed and computed, from which the torques produced by these interactions between stator and rotor harmonic components can be found. During unbalanced stator conditions, symmetric component theory is applied to the stator voltage to get positive-, negative-, and zero-sequence components of stator and rotor currents. The steady-state negative-sequence equivalent circuit for a DFIG is derived based on the reference frame theory. Harmonic currents in the rotor are computed based on the sequence circuits. In both scenarios, the harmonic components of the electromagnetic torque are calculated from the interactions of the harmonic components of the stator and rotor currents. Three case studies are considered, namely: 1) nonsinusoidal rotor injection; 2) an isolated unbalanced stator load scenario; and 3) unbalanced grid-connected operation. The analysis is verified with results from numerical simulations in Matlab/Simulink. For illustration, the second case is verified using experiments. The simulation results and experimental results agree well with the results from analysis. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5340615&sortType%3Das [...]