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

发布时间：2018-05-26 19:26

本文选题：非隔离 + 光伏并网系统　；参考：《电工技术学报》2016年22期

【摘要】：非隔离光伏并网系统中共模电流高频分量的存在会使系统稳定性下降,在低功率运行时,对发电质量影响较大。单共模内回路法对高频分量抑制效果不理想。在构建共模电路等效模型,分析共模电流产生原因的基础上,提出了一种构建双共模内回路抑制共模电流高频分量方法。该方法在保证共模电流满足并网要求的前提下克服了单共模内回路发生高频谐振的缺点,很好地抑制了外部寄生回路共模电流中的高频分量。最后通过仿真和实验证明了所提方法的有效性。
[Abstract]:The existence of high frequency component of common-mode current in unisolated photovoltaic grid-connected system will decrease the stability of the system, and have a great influence on the quality of power generation in low-power operation. The single common mode internal loop method is not effective in suppressing the high frequency component. On the basis of constructing equivalent model of common-mode circuit and analyzing the cause of common-mode current, a method of constructing double-common-mode internal loop to suppress the high-frequency component of common-mode current is proposed. This method overcomes the shortcoming of high frequency resonance in the single common mode inner loop and can restrain the high frequency component of the common mode current in the external parasitic circuit. Finally, the effectiveness of the proposed method is proved by simulation and experiments.
【作者单位】：杭州电子科技大学自动化学院;卧龙电气集团股份有限公司;
【基金】：浙江省自然科学基金资助项目(LY15E070006)
【分类号】：TM615

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