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.
赵瑞广, 刘栋良, 崔丽丽, 魏红梅. 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[J]. 电工技术学报, 2016, 31(22): 186-193.
Zhao Ruiguang, Liu Dongliang, Cui Lili, Wei Hongmei. Research of Common-Mode Current Suppression in Non-Isolated PV Grid-Connected System with Double Common-Mode Inner Loops. Transactions of China Electrotechnical Society, 2016, 31(22): 186-193.
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