排流网情况下地铁杂散电流分布数值模拟研究  

Numerical simulation of stray current distribution in metro network with drainage

作　　者：马德良[1] 方江敏[1] 钱瑶虹 MA De-liang;FANG Jiang-min;QIAN Yao-hong(School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China)

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640

出　　处：《机电工程》2017年第12期1465-1468,共4页Journal of Mechanical & Electrical Engineering

摘　　要：针对地铁杂散电流的腐蚀及预防问题,对排流网情况下地铁杂散电流及相关因素的影响分布进行了研究,在原有的走行轨—金属网模型基础上,提出并建立了走行轨—排流网—金属网系统的物理模型,基于基尔霍夫定律建立相应的数学模型,利用MATLAB对数学模型进行了程序编写,分别研究了排流网影响效果,以及排流网条件下变电所间距、过渡电阻和走行轨纵向电阻对走行轨电流、走行轨电压、杂散电流和排流网中电流的影响。结果表明:排流网可以排流大部分杂散电流,从而降低腐蚀危害;变电所的间距不宜大于2 km,过渡电阻宜设定在15Ω·km以上,尽可能降低走行轨纵向电阻。Aiming at the corrosion and prevention of stray current in the subway,the influence distribution of the stray current and related factors of the subway is studied.on the basis of the existing rail-metal mesh model,the physical model of the rail-drain network-metal mesh system was proposed and established.Based on Kirchhoff＇s Law,the corresponding mathematical model is established,Matlab was used for programmingthe mathematical model,the effect of the drainage network and the influence of the distance between the substation,the transition resistance and the longitudinal resistance of the running rail on the running rail current,the running rail voltage,the stray current and the current in the drain network are studied respectively.The results indicate thatdrainage network can drain most of the stray current,thereby reducing the corrosion hazard;substation spacing should not be greater than 2 km,the transition resistance should be set at 15 Ω·km or more,the longitudinal resistance of the track should be reduced as much as possible.

关 键 词：杂散电流 地铁 排流网 走行轨 过渡电阻 

分 类 号：TM152[电气工程—电工理论与新技术] TG172.84[金属学及工艺—金属表面处理]