基于二自由度的双馈风力发电系统并网控制策略

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Abstract The regulator design of control system dominates the dynamic performance and steady performance of doubly-fed induction generator(DFIG) power generation system, and even dynamic stability of entire power system. Because of its fast dynamic response, wind power systems inner current loop are generally adjusted to type Ⅰ system, but it also has an obvious shortcoming in anti- interference. A design method of inner current loop based on two-degree-of-freedom type Ⅱsystem is proposed in this paper. Under the compromise between the fast response and anti-interference of the system, a simulation analysis is done under different freedom coefficients, through choosing freedom coefficient reasonably, it can not only increase the anti-interference performance, but also reduce the overshoot of the system. Finally, an experiment is carried out in the 11kW wind power generation system platform. The experimental results show that the proposed control strategy based on two-degree-of-freedom can not only improve the anti-interference of the system, but also keep the faster dynamic response, solving the problem of the gird-connected current low frequency oscillation. The effectiveness of the theoretical analysis and the control strategy is verified.

Key words： Doubly-fed induction generator two-degree-of-freedom low frequency oscillation dynamic adjustment

Received: 02 March 2011 Published: 20 March 2014

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TM614

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	Zhang Chunjiang
	Wang Yong
	Chai Xiuhui
	Kan Zhizhong

Cite this article:

Zhang Chunjiang,Wang Yong,Chai Xiuhui等. Grid-Connected Control Strategy of Double-Fed Wind Power System Based on Two-Degree-of-Freedom[J]. Transactions of China Electrotechnical Society, 2012, 27(8): 203-214.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I8/203

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