城市轨道交通新型杂散电流监测系统研究

Study on New Monitoring System of Stray Current for Urban Rail Transit

在轨道交通钢轨对地绝缘的薄弱区域,部分电流会泄入大地,未能按设计路径流回牵引变电所,由此形成杂散电流。通过分析现阶段杂散电流监测系统的特点,介绍了钢轨泄漏电流测试方法,提出了基于在线监测技术的新型系统,完善了供电回流状态综合分析评价体系。这对提升轨道交通运营安全具有重要的意义。

At the area where the insulation between steel tracks and ground is weak, some electricity current will flow into the ground while not flowing into the traction substation according to the design path, which forms the stray current. Through the analysis of the characteristics of present stray current monitoring system, the method for testing the track leakage current is introduced. And a new on-line monitoring system is proposed which incorporates the comprehensive analysis and evaluation system of return current state and is significant to improve the safety of rail transit operation.