地铁牵引供电回流系统主要问题分析

摘要

介绍了城市轨道交通直流牵引供电系统的主要特点.对直流回流系统运行中曾出现过几个典型问题进行说明, 如钢轨电位升高甚至超标、杂散电流泄漏量大、回流系统设备故障等.通过原因分析、系统总结和归纳有效治理措施, 并针对薄弱环节采用新工艺、新方法, 对直流回流系统提出了新的思路及建议, 可供同行探讨或参考.%Through the introduction of the main characteristics of the DC traction power supply system, this paper thinks that the DC reflux system is more complex than the AC system. There are several typical problems in the operation of the system, such as the rise of the rail potential and the excess of the standard, the large leakage current of the stray current, the failure of the reflux system and so on. The effective management measures are summarized, and new ideas and suggestions are put forward for the reflux system and new process and methods for the weak link.