考虑多供电分区的地铁接触网短路故障原理分析

Analysis of Principles of Subway OCS Short Circuit Faults with Consideration of Multiple Switched Sub-sections

本文介绍了一起车辆段内的接触网短路故障,故障造成2个有列车升弓作业的相邻供电分区跳闸。详细分析了故障发生时的工况与故障特征,通过构建等效电路模型,从整流电源、接触网、牵引电路3个方面进行分析,详细阐述了短路过程中电压电流的变化机理及相邻供电分区跳闸的原因,总结出可资借鉴的经验。

This paper introduces an OCS short circuit fault in the rolling stock depot,which causes the tripping of two adjacent switched sub-sections with train pantograph-uplift operations.By construction of equivalent circuit model,the paper illustrates in details the mechanism of voltage and current changes during the short circuit process and the causes of the tripping of the adjacent switched sub-sections on the basis of analyzing made in three aspects of rectifying power source,catenary and traction circuit,and the experiences are summarized for reference.