电网电压不平衡时PWM变流器负序电流控制策略研究

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Abstract In this paper, it analyzes the mathematical model of three-phase PWM converter under unbalanced grid voltage. Basing on the mathematical model, a novel negative sequence current control strategy of three-phase voltage source PWM converter under unbalance grid is proposed. The novel strategy uses a novel PLL technique to detect the positive and negative sequence of unbalance grid. Negative current closed-loop control strategy is used in the novel strategy to decrease the negative component in the grid current. Finally, the simulation verified the correctness and rationality of the proposed method.

Key words： three-phase PWM converter unbalanced grid voltage negative sequence current a novel PLL technique

Received: 18 August 2015 Published: 18 August 2015

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	Articles by authors
	Zhang Yiyan
	Lu Xianfeng
	Qin Qingfeng

Cite this article:

Zhang Yiyan,Lu Xianfeng,Qin Qingfeng. Research on Negative Current Control Strategy of Three-phase PWM Converter under Unbalance Grid Voltage[J]. Electrical Engineering, 2015, 16(8): 19-24.

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http://dqjs.cesmedia.cn/EN/Y2015/V16/I8/19

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