电网电压不平衡下双馈型风电场可控运行区域及其控制策略

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Abstract Under unbalanced grid voltage conditions, doubly-fed induction generator (DFIG) based wind power generation system requires different amplitude negative-sequence current to achieve different control targets, such as zero pulsation of the electromagnetic torque. Combined with the required negative-sequence current of traditional control objectives during network unbalance, this paper analyzed the output capabilities of the negative-sequence current by the grid-side converter (GSC) of DFIG and rotor-side converter (RSC). Then the controllable operation area of DFIG-based wind farm was achieved, based on the degree of grid voltage unbalance and the active power output. Thereafter, this paper proposed a multi-objective coordinated control strategy of DFIG-based wind farm under unbalanced grid voltage conditions. That is, the optimal control target could be selected according to the degree of grid voltage unbalance and active power output, which further improves the operation performance of DFIG wind farm and the grid-tied power quality. The simulation and experimental results verify the proposed scheme.

Key words： Unbalanced grid voltage wind power generation doubly-fed induction generator wind farm controllable operation area

Received: 23 October 2015 Published: 01 November 2016

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TM614

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	Yao Jun
	Guo Lisha
	Chen Zhiqian
	Zhou Te

Cite this article:

Yao Jun,Guo Lisha,Chen Zhiqian等. Control Strategy of Doubly-Fed Type Based Wind Farm and Its Controllable Operation Area under Unbalanced Grid Voltage Condition[J]. Transactions of China Electrotechnical Society, 2016, 31(20): 181-191.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I20/181

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