地铁变电站电源系统直流接地故障分析

Fault Analysis of DC Grounding of Subway Transformer Substation Power System

地铁变电站电源系统作为地铁供电系统的重要组成部分,是地铁安全稳定运行的动力能源和保障。针对地铁变电站电源系统直流接地故障的成因和危害,从气候及环境因素、设备状态等方面分析原因并制定预防措施。提出采用测量正负极母线对地电压、利用绝缘监控装置实时监控以及分段分部位拉路查找等查找故障点的方法及查找时的注意事项。

As a key part of the subway power supply system,the subway transformer substation power system is the power source and guarantee of stable and safe subway operation. In view of the contributing factors and hazards of the DC grounding fault of the subway transformer substation power system,the article analyzes the causes and develops preventive measures in view of climatic conditions and equipment status,etc. It suggests measuring voltages at positive and negative anodes of the bus,utilizing the monitoring data of the insulating monitoring device and troubleshooting along roads in sections and parts and other methods to find a fault point,with instructions to troubleshooting also given.