摘要
简要介绍了城市轨道交通杂散电流的产生机理及轨道防护措施。在总结已有轨道交通杂散电流计算模型的基础上,对轨道与埋地管道之间土壤电阻进行计算,建立了包含排流网、大地、埋地燃气管道的杂散电流分布数学模型。分析了土壤电阻率、管道距轨道距离、管道防腐层等参数对杂散电流分布的影响,并对杂散电流防护存在局部破损时的管道杂散电流变化进行了计算。
The formation of stray current from rail transit and the prevention measures are briefly introduced.Based on a computional model of stray current and the calculation of soil resistance between track and drainage pipes,a mathematical model of stray current produced from DC traction power supply system is established.The stray current distribution outside the shield covering drainage network,ground,pipelines and track is obtained through digital simulation.Influences of soil resistivity,the distance between pipe and track,as well as the pipeline coatings,the effect of local damage of pipeline coatings are analyzed,changes of stray current are calculated.
出处
《城市轨道交通研究》
北大核心
2014年第3期24-29,共6页
Urban Mass Transit
关键词
城市轨道交通
杂散电流
理论分析
urban rail transit
stray current
theoretical analysis
