电网电压对称故障时DFIG转子电流的优化控制策略

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Abstract In order to suppress the rotor overcurrent of doubly fed induction generator (DFIG) under the symmetrical voltage fault, an optimized rotor current control strategy aimed at restraining the free component of rotor current is proposed based on the DFIG mathematic model and the production principle of the flux free component. Another control loop for the free component of rotor current is added to the convenient current loop for suppressing the overcurrent caused by the voltage fault.Furthermore, on the basis of the DFIG’s control model, the effects of the control system with the controller are analyzed. Taking the effects into account, the parameters of the controller can be designed and enhance the resisting disturbance ability of DFIG on the grid voltage fault. Finally, the DFIG experimental system is built, and the availability of the proposed current control strategy is validated by the experiment results.

Key words： Symmetrical grid voltage fault doubly fed induction generator rotor over current free component of rotor current grid-connected operation

Received: 20 April 2013 Published: 05 August 2014

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TM310

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	Nian Heng
	Cheng Peng
	Ziqiang Zhu

Cite this article:

Nian Heng,Cheng Peng,Ziqiang Zhu. Optimized Control Strategy of Rotor Current for Doubly Fed Induction Generators During Symmetrical Voltage Fault[J]. Transactions of China Electrotechnical Society, 2014, 29(7): 200-208.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I7/200

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