计及撬棒保护影响的双馈风力发电机组故障电流特性研究

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Abstract In order to study the fault current characteristics of doubly-fed induction generator (DFIG) under symmetrical and asymmetrical fault conditions, dynamic model of DFIG in stator stationary reference frame is developed. On condition that a severe fault occurs and crowbar protection is activated, the dynamic characteristics of stator flux linkage of DFIG are studied. Moreover, a simplified calculation model of stator flux linkage is established with consideration of accuracy as well as simplicity. Based on it, the fault current characteristics DFIG under conditions of symmetrical faults and asymmetrical faults are analyzed and the analytical expressions are obtained. Besides, the equivalent calculation models of fault current are built. Finally, the digital simulation results show that the theoretical analysis results have high accuracy in the first two cycles after the fault occurs which can meet the requirements of the study of relaying protection principle and setting calculation.

Key words： Doubly-fed induction generator(DFIG) crowbar protection stator flux linkage fault current characteristics equivalent calculation model

Received: 25 June 2013 Published: 25 May 2015

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TM315

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	Articles by authors
	Kong Xiangping
	Zhang Zhe
	Yin Xianggen
	Wang Fei
	Long Mao

Cite this article:

Kong Xiangping,Zhang Zhe,Yin Xianggen等. Study of Fault Current Characteristics of DFIG Considering Impact of Crowbar Protection[J]. Transactions of China Electrotechnical Society, 2015, 30(8): 1-10.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I8/1

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