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从分析多个电铁牵引站供电线路进线档出现架空地线连接金具电腐蚀入手,着重分析了铁路负荷回流在牵引站地网及其进线各接地点处的分布;通过多次现场实测,并对等效回路模型及其各处电流分布的分析,得出了电铁牵引站供电线路进线档地线上存在较大电流的结论。讨论了牵引站供电线路进线档电烧伤事故频繁发生给电网安全运行带来的影响,并对现有技术条件和运行维护制度提出了相应的改进措施和建议。
This paper analyzes the electric corrosion of the overhead ground wire connecting fittings from the analysis of the power supply lines of multiple electric traction stations, and analyzes the distribution of the railroad load backflow at each grounding point of the traction net and its incoming line. , And analyzes the equivalent circuit model and the current distribution around it, and concludes that there is a large current on the ground of the power supply line of the electric traction station. The influence of frequent electric bums on the incoming line of traction power station to the safe operation of power grids was discussed. Corresponding improvements and suggestions were also made to the existing technical conditions and operation and maintenance systems.