一种高速铁路贯通地线断线故障定位方法  

Method for locating integrated grounding line break fault of high-speed railway

作　　者：潘怡林 陈丽华[1] 黄文[1] 何正友[1] 王科[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《电力自动化设备》2016年第10期154-158,共5页Electric Power Automation Equipment

基　　金：国家自然科学基金高铁联合基金重点项目(U1234203)~~

摘　　要：结合电路和空间电位分布原理,提出了一种高速铁路贯通地线断线故障定位方法。根据扼流变压器的位置对贯通地线进行区段划分,并通过监测信号电缆护层接地电流变化来确定断线区段。向故障区段钢轨首端注入一定电流,通过测量贯通地线上方的地表电位精确定位断线故障点。采用CDEGS仿真平台搭建高速铁路综合接地系统模型进行验证,仿真结果表明所提出的方法能较精确定位断线点。A method combining circuit and space potential distribution principles is introduced for locating the integrated grounding line break fault of high-speed railway,which divides the integrated grounding line into several sections according to the position of impedance transformers,determines the broken section by monitoring the current variation of its signal cable sheath,injects DC current into the rail of faulty section at its head end,and measures the earth surface potential above the integrated grounding line to accurately locate the break point. A simulation model of integrated grounding system for high-speed railway is built on CDEGS platform and the simulative result shows the proposed method can accurately locate the break point.

关 键 词：高速铁路 贯通地线 故障定位 信号电缆护层电流 地表电位 CDEGS 

分 类 号：U229[交通运输工程—道路与铁道工程] TM744.43[电气工程—电力系统及自动化]