一种双馈风力发电机在电网电压不平衡条件下的改进控制策略

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Abstract This paper presents the derivations and analysis of doubly-fed induction generator’s model under grid voltage unbalance conditions. Active power, reactive power and generator torque are also defined under these conditions. Based on these analysis, an improved control strategy of doubly-fed generator (DFIG) under unbalance conditions is proposed. According to different control purposes, pulsation of stator current, rotor current, active and reactive power, electromagnetic torque can be eliminated by using proposed control scheme. In addition, a fast decomposition algorithm is used to decompose positive and negative sequence and it is much faster than decomposition method based on low pass filter or band pass filter, so the performance of control system is greatly improved. In order to validate the proposed strategy, simulation using Matlab/Simulink and experimental test are carried out and the simulative and experimental results validate the proposed control strategy.

Key words： Doubly-fed induction generator voltage unbalance positive and negative rotating reference frame sequence extraction vector control

Received: 02 November 2010 Published: 07 March 2014

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TM464

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	Articles by authors
	Hu Sheng
	Lin Xinchun
	Kang Yong
	Zou Xudong

Cite this article:

Hu Sheng,Lin Xinchun,Kang Yong等. An Improved Control Strategy of Doubly-Fed Induction Generator Under Grid Voltage Unbalance[J]. Transactions of China Electrotechnical Society, 2011, 26(7): 21-29.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2011/V26/I7/21

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