基于主动零序电流注入的新型漏电流控制方法  

A Leakage Current Control Method Based on Active Zero Sequence Current Injection

作　　者：王秀云[1] 毛廷瑞 刘闯[1] 王汝田[1] WANG Xiu-yun;MAO Ting-rui;LIU Chuang;WANG Ru-tian(Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]东北电力大学,电气工程学院,吉林吉林132012

出　　处：《电力电子技术》2024年第7期33-35,51,共4页Power Electronics

基　　金：国家自然科学基金(52277170)。

摘　　要：非隔离型光伏并网系统因缺少隔离级,导致漏电流流入交流电网,引起并网电流畸变等问题。针对此问题,提出一种基于主动零序回路的非隔离型并网变换器拓扑,并提出了一种基于主动零序电流注入的新型漏电流控制方法,该方案可以低成本、高效率的实现漏电流抑制、共模电压稳定等功能。最后使用StarSim设备搭建实验平台,验证了所提拓扑结构和所提控制方法对漏电流抑制和共模电压稳定的有效性。Non-isolated photovoltaic grid-connected systems lack isolation stages,leading to leakage current flowing in-to the AC grid and causing grid-connected current distortion and other issues.A non-isolated grid-connected inverter topology based on active zero sequence loop and a novel leakage current control method based on active zero se-quence current injection are proposed to address this issue.This scheme can achieve low-cost and high-efficiency functions such as leakage current suppression and common mode voltage stability.Finally,an experimental platform which is built by StarSim to verify the effectiveness of the proposed topology and control method in suppressing leak-age current and stabilizing common mode voltage.

关 键 词：逆变器 漏电流 零序电流 

分 类 号：TM464[电气工程—电器]