城市轨道交通钢轨电位和新型回流装置研究

以成都地铁为例,基于钢轨绝缘节的老化和单向导通装置频繁导通问题,将车辆段及停车场等效为小电阻接地支路进行仿真。仿真结果表明,小电阻接地支路可使正线钢轨电位最大提升27.2 V,威胁了正线的安全运营。据此提出一种应用于车辆段与停车场的新型钢轨回流装置,并介绍其控制方法。该新型钢轨回流装置具有辅助列车安全通过绝缘节遏制车辆段与停车场内杂散电流、评估钢轨绝缘节绝缘性能和测量出入段线钢轨过渡电阻的功能。

Research on Rail Potential of Urban Rail Transit and New Reflux Device

Taking Chengdu metro as the background and focusing on problems like the rail insulation joint aging and the frequent unidirectional conduction device troubles,the vehicle depot and train parking lot are equivalent to small resistance grounding branch for simulation.The result shows that the small resistance grounding branch could raise the maximum rail potential up to 27.2 V,directly threatening the main line safe operation.Therefore,the application of a new rail reflux apparatus between vehicle depot and train parking lot is proposed,the control method of which is introduced.This device could help train passing through the insulation joint safely,cut off the stray current between vehicle depot and train parking lot vehicle depot and train parking lot,evaluate the insulation performance of rail insulation joints and measure the rail transition resistance of the access lines as well.