基于电流采样的光伏逆变器漏电流抑制分析  

Analysis of Leakage Current Detection in Photovoltaic Inverters Based on Current Sampling

作　　者：成云朋 张济韬 刘华杰 CHENG Yunpeng;ZHANG Jitao;LIU Huajie(Xiangshui Power Supply Branch of State Grid Jiangsu Electric Power Co.,Ltd.,Yancheng 224600,China)

机构地区：[1]国网江苏省电力有限公司响水县供电分公司,江苏盐城224600

出　　处：《通信电源技术》2024年第23期70-72,76,共4页Telecom Power Technology

摘　　要：漏电流抑制是非隔离光伏系统需要解决的关键问题之一。为降低漏电流对电网系统的影响,文章分析了光伏逆变器漏电流的产生机理,总结基于电流采样的光伏逆变器漏电流检测方法,包括直接检测法和间接检测法,从改进光伏逆变器拓扑结构的角度探讨漏电流抑制策略。Leakage current suppression is one of the key issues that non isolated photovoltaic systems need to address.To reduce the impact of leakage current on the power grid system,this article analyzes the mechanism of leakage current generation in photovoltaic inverters,summarizes current sampling based leakage current detection methods for photovoltaic inverters,including direct detection and indirect detection methods,and explores leakage current suppression strategies from the perspective of improving the topology structure of photovoltaic inverters.

关 键 词：光伏逆变器 漏电流检测 电流采样 

分 类 号：TM615[电气工程—电力系统及自动化] TM464