采用双共模内回路抑制非隔离光伏并网系统的共模电流的研究

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Abstract The existence of high-frequency components in common-mode (CM) current would reduce the stability of non-isolated PV grid-connected system. In low power operation, it has great impacts on the output power quality. The single CM inner loop method in suppressing the high-frequency components was not ideal. Based on the CM equivalent circuit model and the causes of the CM current, a novel double CM inner loops method was proposed to restrain the high-frequency components in CM current. This method not only meets the grid connection demand of CM current, but also overcomes the high frequency resonant problem. Furthermore, the high-frequency components in CM current are substantially reduced. The simulating and experimental results have verified the proposed method.

Key words： Non-isolated PV grid-connected system common-mode current inner loop high- frequency component

Received: 30 March 2016 Published: 02 December 2016

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TM615

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	Zhao Ruiguang
	Liu Dongliang
	Cui Lili
	Wei Hongmei

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Zhao Ruiguang,Liu Dongliang,Cui Lili等. Research of Common-Mode Current Suppression in Non-Isolated PV Grid-Connected System with Double Common-Mode Inner Loops[J]. Transactions of China Electrotechnical Society, 2016, 31(22): 186-193.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I22/186

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