Investigation of Transient Torque during a Power System Fault in Wind Power Turbines Having a DFIG and Crowbar Circuit

• Autorzy: Cheng M. , Cai X. , Wu G.

Warianty tytułu

PL

Badania momentu przejściowego podczas zakłóceń pracy systemu z turbiną wiatrową wyposażoną w układ DFIG

• Języki publikacji: EN

Abstrakty

EN

To study the influence of power system voltage drop on the doubly-fed induction generator (DIFG) shaft, this paper analyzes the electromagnetic torque change of the DFIG through approximated analytical expression of the stator fault current and rotor fault current obtained by the superposition between transient current based on vector method and steady-state current based on equivalent circuit method, and then the DFIG torque change situations under the following circumstances: the three-phase symmetrical voltage dip of stator terminal, the converter of the rotor side is cut off, and the crowbar circuit is put into the operation, will be analyzed through the method. Furthermore, on the basis of theoretical analysis, a 2MW DFIG model is established by PSCAD, and the simulation results validate that the torque changes of the DFIG shaft could be analyzed by the expression of the DFIG torque during the grid voltage drops through the superposition of the transient current and steadystate current. At last, the optimizing value of the crowbar resistance is given.

PL

W artykule analizuje się zmiany momentu elektromagnetycznego podwójnie zasilanego generator indukcyjnego DFIG poprzez ocenę prądów wirnika i stojana otrzymaną przez superpozycję prądów przejściowych (metoda wektorowa) i prądu stanu ustalonego (metoda obwodów zastępczych). Badania symulacyjne potwierdziły słuszność metody.

Słowa kluczowe

EN

voltage dip; doubly-fed induction generator; DIFG; electromagnetic torque; crowbar circuit; shaft; electrical technology; electrical power engineering

PL

zapad napięcia; DFIG; moment elektromagnetyczny; elektrotechnika; elektroenergetyka

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Przegląd Elektrotechniczny
• Rocznik: 2011
• Tom: R. 87, nr 11
• Strony: 245--250
• Opis fizyczny: Bibliogr. 16 poz., il., tabl., wykr.

Twórcy

autor

Cheng M.

autor

Cai X.

autor

Wu G.

• Key Laboratory of Control of Power Transmission and Transformation (KLCPTT), Wind Power Research Centre (WPRC), School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University,

Bibliografia

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• [14] V. Akhmatov, Analysis of Dynamic Behavior of Electric Power Systems with Large Amount of Wind Power, Ph.D. dissertation, Technical University of Denmark, Copenhagen, Denmark, 2003.
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