基于Hausdorff距离的光伏漏电流监测方法  

A PV Leakage Current Monitoring Method Based on Hausdorff Distance

作　　者：韩少华 毛王清 葛萱 许磊 陈肯 梁睿[2] HAN Shaohua;MAO Wangqing;GE Xuan;XU Lei;CHEN Ken;LIANG Rui(Suqian Power Supply Branch of State Grid Jiangsu Electric Power Co.,Ltd.,Suqian 223800,Jiangsu,China;School of Electrical Engineering,China University of Mining&Technology,Xuzhou 221116,Jiangsu,China)

机构地区：[1]国网江苏省电力有限公司宿迁供电分公司,江苏宿迁223800 [2]中国矿业大学电气工程学院,江苏徐州221116

出　　处：《电气传动》2024年第9期90-96,共7页Electric Drive

基　　金：江苏省宿迁市指导性科技项目(Z2021145);国网宿迁供电公司本部2022年研究项目(SGJSSQ00KJJS2200251);江苏省碳达峰碳中和科技创新专项资金(重大科技示范)(BE2022609);国家自然科学基金面上项目(52077215)。

摘　　要：与带有隔离变压器的大型光伏系统相比,分布式光伏的功率与体积较小,且为了提高工作效率,在设计时多采用非隔离型逆变器,但也因此产生了会危害配网系统安全的光伏漏电流。以单相全桥结构的光伏系统为例,详细分析了光伏漏电流的产生机理,随后分析了光伏漏电流进入配电网后的波形特征,并在此基础上提出了一种基于Hausdorff距离的光伏漏电流监测方法,简单高效地解决了光伏漏电流监测与保护困难的问题。最后对提出的方法进行仿真分析,验证了所提方法的可行性。Compared with large photovoltaic systems with isolation transformers,distributed photovoltaic systems have small power and volume.In order to improve efficiency,non-insulated inverters are often used in design,but photovoltaic leakage current endangering system safety is also generated.Taking the single-phase fullbridge photovoltaic system as an example,the generation mechanism of photovoltaic leakage current was analyzed in detail through in-depth discussion of the problem of photovoltaic leakage current.Subsequently,the waveform characteristics of the photovoltaic leakage current entering the distribution network were analyzed,and a photovoltaic leakage current monitoring method based on Hausdorff distance was proposed,which simply and efficiently solved the problem of photovoltaic leakage current monitoring and protection.Finally,the feasibility of the proposed method was verified by simulation analysis.

关 键 词：非隔离型 分布式光伏 逆变电路 漏电流监测 HAUSDORFF距离 

分 类 号：TM464[电气工程—电器]