高速铁路电磁影响下平行电缆接地方式的选择  

Selection of Parallel Cable Grounding Mode under Electromagnetic Influence of High Speed Railway

作　　者：李静雯 解绍锋[1] LI Jingwen;XIE Shaofeng(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China)

机构地区：[1]西南交通大学电气工程学院,四川成都611756

出　　处：《电工技术》2021年第14期179-183,共5页Electric Engineering

基　　金：中铁上海设计院集团科技开发项目(编号2015-151)。

摘　　要：随着电气化铁路的高速发展,铁路网密度不断加大,高速列车行驶由于牵引电流大会对并行的电力电缆安全运行造成电磁影响。研究了高速铁路对平行电缆的容性、感性和阻性耦合机理,推导了AT牵引供电系统短回路附近大地电位的理论公式。建立复线AT牵引供电系统和电缆的仿真模型并与数学模型对比验证,仿真了在不同并行长度、接近距离和接地方式条件下的电缆金属护层的感应电压、感应电流大小,得出不同并行长度下保证电缆和人员安全的接近距离,对比了不同接地方式的优劣,并提出了工程防护建议措施。With the rapid development of electrified railway and the increasing density of railway network,the high-speed train will have electromagnetic impact on the safe operation of parallel power cables due to the high traction current.In this paper,the capacitive,inductive and resistive coupling mechanism of high-speed railway to parallel cable is studied,and the theoretical formula of ground potential near the short circuit of at traction power supply system is derived.The simulation model of at traction power supply system and cable of double line is established and compared with the mathematical model.The induced voltage and induced current of cable metal sheath under different parallel length,proximity distance and grounding mode are simulated.The approach distance to ensure the safety of cable and personnel under different parallel length is obtained.The advantages and disadvantages of different grounding methods are compared,and the engineering is proposed protective measures recommended.

关 键 词：高速铁路 电磁耦合 平行电缆 接地方式 

分 类 号：U228[交通运输工程—道路与铁道工程]