一起地铁气体绝缘金属封闭开关设备跳闸故障原因分析  

Cause analysis of a metro gas insulated switchgear tripping fault

作　　者：徐东坡 吴梦丽 朱军红 梁建涛 XU Dongpo;WU Mengli;ZHU Junhong;LIANG Jiantao(XJ Electric Co.,Ltd,Xuchang,He’nan 461000)

机构地区：[1]许继电气股份有限公司,河南许昌461000

出　　处：《电气技术》2022年第12期70-74,共5页Electrical Engineering

摘　　要：针对一起地铁气体绝缘金属封闭开关设备(GIS)跳闸导致的该线路多个地铁站整站失电事件,本文分析故障现象、故障波形特征和故障原因,并基于实时数字仿真(RTDS)系统搭建仿真试验模型,重现现场故障现象。分析表明,开关柜跳闸的原因是地铁电缆绝缘层击穿,发生接地故障,保护动作跳闸,且故障期间相邻电缆受接地环流的影响,相关电流保护动作跳闸,最终导致多个地铁站整站失电。Aiming at the power loss event of multiple subway stations along the line caused by the tripping of a subway gas insulated switchgear(GIS),this paper analyzes the fault phenomenon,fault waveform characteristics and fault causes,and builds a simulation test model based on real-time digital simulation(RTDS)system to reproduce the on-site fault phenomenon.The analysis shows that the switchgear tripping is caused by the breakdown of the insulation layer of the cable,and relay protection works when the ground fault occurs.During the fault,the adjacent cables are affected by the grounding circulating current,and the relevant current protection acts to trip,which eventually leads to the power loss of multiple metro stations.

关 键 词：地铁 电缆 绝缘击穿 接地环流 实时数字仿真(RTDS) 

分 类 号：U231.94[交通运输工程—道路与铁道工程]