不对称度对消弧线圈系统高阻接地故障选线影响研究  

Research on the Influence of Asymmetry on High-resistance Earth Fault Line Selection of Arc Suppression Coil System

作　　者：伊国强 吴泽文 杨波 胡新宇 石发科 李必伟 YI Guo-qiang;WU Ze-wen;YANG Bo;HU Xin-yu;SHI Fa-ke;LI Bi-wei(School o f Electric&Information Engineering,Changsha University o f Science and Technology,Changsha 410114,China;Qixian Power Supply Company,State Grid Henan Electric Power Company,Hebi 456750,China)

机构地区：[1]长沙理工大学电气与信息工程学院,长沙410114 [2]国网河南省电力公司淇县供电公司,河南鹤壁456750

出　　处：《电力学报》2020年第5期410-415,456,共7页Journal of Electric Power

摘　　要：对于配电网消弧线圈单相接地故障问题,一般采用五次谐波选线法、暂态选线法来选出故障线路,上述方式都未考虑不对称度对选线的影响。为研究不对称度对消弧线圈系统高阻选线的影响,分析了消弧线圈系统存在不对称度情况下发生单相接地故障机理,通过建立相应的理论模型,以及利用MATLAB/Simulink仿真平台进行仿真,对比验证了配电网消弧线圈接地系统在不对称情况下发生高阻接地故障选线的影响,分析得出系统存在不对称时,谐波检测法以及暂态选线法均无法准确诊断故障线路。For single-phase grounding faults in the distribution network,the arc suppression coil grounding system generally uses the fifth harmonic line selection method and the transient line selection method to select the faulty line.This method does not consider the impact of asymmetry on the line selection.In order to study the influence of asymmetry on the high-resistance line selection of the arc suppression coil system,this paper theoretically analyzes the mechanism of single-phase grounding fault when the arc suppression coil system has asymmetry,and establishes the corresponding theoretical model and MATLAB/Simulink simulation platform.Simulation and comparison verify the influence of high-resistance grounding fault line selection in the arc suppression coil grounding system of the distribution network under asymmetry.The analysis shows that when the system is asymmetry,the harmonic detection method and the transient line selection method are not accurate diagnose the faulty line.

关 键 词：配电网 高阻接地故障 不对称度 五次谐波 暂态分量 

分 类 号：TM862[电气工程—高电压与绝缘技术]