钢轨电位限制装置操作过电压抑制研究  

Study on Suppression of Operation Overvoltage of Rail Overvoltage Protection Device

作　　者：李国玉 刘炜[2] 兰慧峰 陈苏南 樊国桢 许四喜 LI Guoyu;LIU Wei;LAN Huifeng;CHEN Sunan;FAN Guozhen;XU Sixi

机构地区：[1]青岛地铁集团有限公司 [2]西南交通大学电气工程学院 [3]成都瑞尔维轨道交通技术有限公司

出　　处：《电气化铁道》2022年第4期57-60,64,共5页Electric Railway

摘　　要：针对国内地铁线路频繁出现异常钢轨电位并导致钢轨电位限制装置频繁动作的问题,在某线路3个车站进行了同步测试试验。通过对钢轨电位的测试结果进行分析,研究了该线路正常运营期间钢轨电位限制装置操作过电压对正线的钢轨电位影响机理,并在实测基础上搭建了回流系统仿真模型。测试及仿真结果表明,钢轨电位限制装置分闸操作过电压会导致其频繁Ⅰ、Ⅱ段动作。针对该问题提出了并联电阻抑制方案,并通过仿真及试验验证了该方案的有效性。With regard to the problems of frequent occurrence of abnormal rail potential and frequent actions of rail overvoltage protection device caused by the abnormal rail potential,the simultaneous tests are performed in three stations in a line.By analyzing the test results of the rail potential,the influencing mechanism to the rail potential of main track caused by overvoltage of rail protection overvoltage device during normal operation of the line are studied,and the simulation model of return system is established on the basis of the actual testing.The test and simulation results show that the opening operation of rail overvoltage protection device leads to the frequent actions of sectionⅠandⅡ.The scheme for the suppression by parallel resistances is put forward with regard to the problem and it is verified to be effective after simulation and test.

关 键 词：直流牵引供电系统 钢轨电位限制装置 钢轨电位 操作过电压 并联电阻吸收 

分 类 号：U231.8[交通运输工程—道路与铁道工程]