基于暂态磁链补偿前馈的DFIG低穿强励直流灭磁方法

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Abstract The ability of low voltage ride through(LVRT) is one of the most important performance for doubly-fed induction generator(DFIG). The application of Crowbar circuit makes the IGBTs of rotor side converter(RSC) be switched off during LVRT, while the transient current of DFIG is under the condition of natural attenuation. Aiming at the deficiency of over current or over voltage for RSC applying Crowbar circuit, one kind of strategy based on current source controlling of the rotor while the command is changing with a constant rate is proposed for demagnetization of the transient DC flux component. Then the demagnetization current’s making zero and the necessary condition of transient rotor current’s controlling is researched. The transient controller of rotor current implements the forceful DC demagnetization and the AC excitation of rotor with rapid response after the DC demagnetization. The reactive power consumption is reduced during LVRT compared with the strategy applying Crowbar. The dynamic simulation and experiment validated the correctness of the theory researched and shows feasibility of the strategy.

Key words： Doubly-fed induction generator(DFIG) flux linkage low voltage ride through(LVRT) forceful excitation

Received: 16 June 2013 Published: 05 November 2014

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TM315

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	Luo Hao
	Lin Mingyao
	Cao Yang
	Guo Wei
	Zhuang Jun

Cite this article:

Luo Hao,Lin Mingyao,Cao Yang等. Forceful Demagnetization of DC Component Based on Transient Feedforward Compensation During DFIG’s LVRT[J]. Transactions of China Electrotechnical Society, 2014, 29(9): 64-73.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I9/64

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