排流柜及钢轨电位限制装置对杂散电流及钢轨电位影响的测试分析  

Test and Analysis of Current Drainage Cabinet and OVPD Influence on Stray Current and Rail Potential

作　　者：陈华银 樊国桢 张丽[2] 李思文 刘炜[2] CHEN Huayin;FAN Guozhen;ZHANG Li;LI Si-wen;LIU Wei(Chengdu Rail Transit Group Co.,Ltd.,610096,Chengdu,China)

机构地区：[1]成都轨道交通集团有限公司,成都610096 [2]西南交通大学电气工程学院,成都610031

出　　处：《城市轨道交通研究》2022年第3期31-35,共5页Urban Mass Transit

基　　金：国家重点研发计划(2017YFB1201103-05)。

摘　　要：针对国内城市轨道交通钢轨电位限制器因长期闭合而注入大量杂散电流、排流柜投入使用缺少依据等问题,在某地铁线路部分区间的夜间非运营时段,利用单列车往返运行,对该区段的杂散电流及钢轨电位进行测试。在试验过程中,设置了排流柜及钢轨OVPD(电位限制装置)均未投入使用、仅排流柜投入使用、排流柜及OVPD均投入使用等3种工况,研究了不同工况对直流牵引供电系统中杂散电流和钢轨电位的影响。测试结果表明:排流柜的投入使用会加剧杂散电流的泄漏,并恶化钢轨电位的分布;排流柜和钢轨电位限制装置同时投入使用,会进一步加剧杂散电流的泄漏,且两者同时投入使用时排流柜排流效果变差。In view of the problems of large amount of stray current injection,and lack of basis for the use of current drainage cabinets due to long-term closure of domestic urban rail transit OVPD( over-voltage protection device), during the non-operating period of some sections of certain metro line overnight,a single train is operated round-trip for conducting tests on stray current and rail potential at this section. During test procedure,three operating conditions are set up,that are where the drainage cabinet and rail OVPD are both not put into use,where only the drainage cabinet is put into use,and where the drainage cabinet and OVPD are both put into use. The influence of different working conditions on the stray current and rail potential in the DC traction power supply system is studied. The test results showthat the use of drainage cabinet will aggravate the leakage of stray current and deteriorate the distribution of rail potential;the use of drainage cabinet and OVPD at the same time will further aggravate the leakage of stray current,and the draining effect of the drainage cabinet becomes worse.

关 键 词：城市轨道交通 直流牵引供电系统 排流柜 钢轨电位限制装置 杂散电流 钢轨电位 

分 类 号：U223.62[交通运输工程—道路与铁道工程]