地铁车辆段/停车场的杂散电流打火问题分析及回流系统优化

Analysis of Arcing Problem Caused by Stray Current and Backfeeding System Optimization in Metro Vehicle Depot and Stabling Yard

针对地铁车辆段/停车场频频出现的打火问题,基于实际打火典型案例,按回流系统有无异常的情况分别阐述了杂散电流打火的原因。深入分析了镟轮库、洗车库及轨道车库等非电化股道在车轮过钢轨绝缘节时发生打火的原因。针对段场回流系统提出了设置回流隔离区、库内应避免出现直接或间接接地点等优化建议。

Stray current causes frequent arcing problem in metro depot and stabling yard.Based on actual typical arcing problem cases,reasons for stray current arcing issue is expounded in conditions whether backfeeding system has abnormality or not.The reason why arcing problems occur when wheels pass insulated rail joint on track without overhead contact system such as lathe library,washing garage and track garage is analyzed in-depth.Targeting depot and yard backfeeding system,optimization advices such as setting up backfeeding separation area,avoiding direct or indirect ground points inside garage are proposed.