CAJ | 학술논문

抑制漏电流已成为非隔离型光伏并网系统研究的重要技术问题。考虑到漏电流在光伏并网系统中的重要性，文章首先建立漏电流谐振电路等效模型，指出传统H4拓扑结构的不足，并分析漏电流产生原理。然后介绍了一种能够有效抑制漏电流的新型拓扑结构，分析其工作原理和并网控制方法，最后在一台2 kW的实验样机上进行实验验证，结果表明该新型拓扑结构的光伏并网逆变器能较好的抑制漏电流。
억제루전류이성위비격리형광복병망계통연구적중요기술문제。고필도루전류재광복병망계통중적중요성，문장수선건립루전류해진전로등효모형，지출전통H4탁복결구적불족，병분석루전유산생원리。연후개소료일충능구유효억제루전류적신형탁복결구，분석기공작원리화병망공제방법，최후재일태2 kW적실험양궤상진행실험험증，결과표명해신형탁복결구적광복병망역변기능교호적억제루전류。
It has become an important issue for the non-isolatied photovoltaic grid-connected system to suppress the leakage current .As the leakage current has great importance in the photovoltaic grid-connected system , this paper firsty establishes the equivalent model of leakage current resonant circuit , and then it points out the deficiency of tradi-tional H4 topology, and analyzes principles of the generation of leakage current .Next,the paper proposes a novel to-pology structure which can effectively suppress the leakage current ,analyzing its working principles and control meth-ods respectively .Finally,the testing rusuts on a 2kW experimental prototype verify that photovoltaic grid-connected in-verter with this novel topology features could suppress the leakage current better .