基于PSCAD的110kV架空线路接地故障下地电位行波仿真研究  

Study on Simulation of Earth Potential Travelling Wave Along 110 kV Overhead Transmission Line Under Ground Fault Based on PSCAD

作　　者：黄福高 玉聪 莫小向 韦基毅 王琛 刘国威 HUANG Fugao;YU Cong;MO Xiaoxiang;WEI Jiyi;WANG Chen;LIU Guowei(Hechi Power Supply Bureau of Guangxi Power Grid Co.,Ltd.,Hechi 547000,China)

机构地区：[1]广西电网有限责任公司河池供电局,广西河池547000

出　　处：《电工技术》2020年第9期38-41,共4页Electric Engineering

摘　　要：架空输电线路发生接地故障时,故障行波在线路地电位传播,若能有效采集地电位端的故障行波,则可实现双端行波故障定位。为验证地电位行波定位的可行性,利用PSCAD软件搭建了包含75基杆塔的110kV架空线路仿真模型,研究了不同接地故障下地电位暂态电流的衰减特性。仿真结果表明,接地故障时地电位行波在传播30km以内仍可被检测,并可用于双端行波定位。When the ground fault occurs in the overhead transmission line,the fault traveling wave propagates along the line ground potential.If the fault traveling wave at the ground potential can be detected effectively,then the fault location of the double terminal traveling wave can be realized.In order to verify the feasibility of the location of ground potential traveling wave,this paper builds a simulation model of 110 kV overhead lines with 75 base towers in PSCAD.The attenuation characteristics of ground potential transient current under different ground faults are studied.Simulation results show that the ground potential traveling wave can still be detected within 30 km when the ground fault occurs.Accordingly,the ground potential travelling wave can be used for the double terminal traveling wave location.

关 键 词：接地故障 仿真 地电位行波 故障定位 

分 类 号：TM743[电气工程—电力系统及自动化]