小电流接地系统两点接地故障仿真分析  

Analysis of the Cross-country Grounded Fault in the Low Current Grounded System

作　　者：吴凤翔 顾兆雄 WU Fengxiang;GU Zhaoxiong(Shanghai Zhabei Power Plant of State Grid,Shanghai 200438,China)

机构地区：[1]国网上海市电力公司闸北发电厂,上海200438

出　　处：《上海电力大学学报》2020年第6期524-528,共5页Journal of Shanghai University of Electric Power

摘　　要：针对小电流接地系统两点接地故障的复杂性以及理论分析的难度,建立了仿真模型,分析了全部4种类型的两点接地故障,得到了故障时相电压、零序电压和零序电流的特征,提出了一种判断两点接地故障的方法。最后,通过PSCAD/EMTDC软件进行了仿真验证。Aiming at the complexity and theoretical analysis difficulty of the cross-country grounded fault in the low current grounded system,a simulation model is established.Four types of the cross-country grounded fault are analyzed.Then,the characteristics of phase voltage,zero sequence voltage and zero sequence current are obtained.A method for detecting the cross-country grounded fault is proposed.Finally,the theoretical analysis is verified by PSCAD/EMTDC simulation.

关 键 词：两点接地 接地故障 小电流接地系统 配电网 

分 类 号：TM773[电气工程—电力系统及自动化]