地铁直流供电接触轨残压检测及机理研究

Detection and Mechanism Research of Contact Rail Residual Voltage for Metro DC Power Supply System

针对城市轨道交通直流牵引供电系统的接触轨停电后停电作业区域产生的接触轨残压,导致现场停电检修无法正常开展,以及送电时因残压值较高线路测试通不过,无法恢复接触轨送电的现象,对接触轨残压进行实地测试,通过录波、数据分析,提出并验证了接触轨线间电容和线路长度对接触轨残压和线路测试的影响,为地铁运营公司和设计院改进PSCADA系统遥调合闸时序和提高直流开关综合保护装置线路测试中的接触轨残压值提供了依据。

In view of the residual voltage caused by the contact rail in the DC traction power supply system of urban rail transit, the site failure maintenance cannot be carried out normally, and the line test of the contact rail cannot be passed because of the high residual voltage line test, the power of the contact rail cannot be restored. The effect of the capacitance and line length between the contact rail work lines on the residual voltage and line test is proposed and verified through the reiterative recording and data analysis of the fault. It provides the basis for the subway operation company and the design institute to improve and control the closing time sequence and to improve the contact rail residual pressure in the circuit test of the DC switch comprehensive protection device.