北京地铁大兴线钢轨电位限制装置瞬动原因分析与优化设计

Rail potential limiting device transient cause analysis and optimization design on Daxing line of Beijing metro

随着城市轨道交通的迅速发展,地铁在城市交通中发挥着不可替代的作用。地铁供电牵引系统为电力机车的运行提供持续不断的直流电源动力,其安全可靠的运行是地铁安全运营的重要保障。北京地铁大兴线自开通试运营以来,总是出现钢轨电位Ⅱ段多站同时瞬动的异常现象,通过分析轨电位Ⅱ段保护动作的规律特征,查找轨电位升高的原因,提出了解决问题的方案并优化了轨电位二次保护回路的设计,提高了运营效率,保证了运营安全。

With the rapid development of urban rail transit,metro plays an important role in urban transit.Providing constant DC power supply for operation of trains running is an important guarantee for a safe and reliable metro operation.Since the Daxing line of Beijing metro opening operation,frequently occurred irregularities are seen in multi stations rail potential II.With the characteristic analysis of patterns of rail potential II protection action,this paper identifies the causes of rail potential rise,proposes solutions to the problems,optimizes the design of circuit protection of rail potential,improves operational effi ciency and ensures operation safety.