高速列车过绝缘节轮轨间拉弧机理分析及抑制  

Mechanism Analysis and Suppression of Arcing between Wheel and Rail of High-speed Train over Insulated Joints

作　　者：肖嵩 朱涛 段君璋 郭裕钧 高国强[1] 吴广宁[1] XIAO Song;ZHU Tao;DUAN Junzhang;GUO Yujun;GAO Guoqiang;WU Guangning(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：《铁道学报》2024年第6期46-55,共10页Journal of the China Railway Society

基　　金：国家自然科学基金(52277166)。

摘　　要：随着高速铁路运营密度、运行速度和牵引功率的不断提升,车辆移动回流系统与轨道固定回流系统耦合复杂造成过绝缘节时绝缘节间拉弧频发,电弧侵蚀绝缘节,导致轨道电路串接、串码等故障,严重威胁行车安全。围绕高速列车过钢轨绝缘节时车轨间回流耦合引起的绝缘节间拉弧问题开展研究,解析轮对接近、跨接、驶离绝缘节时回流途径拓扑结构及阻抗的动态变化过程,基于牵引系统的实采阻抗参数构建“车-轨”移动接地系统三维等效电路模型,解析列车各轮对滚动过绝缘节各接地轮轴回流路径及大小的动态变化规律。基于系统实际结构参数构建“转向架-钢轨”3D多物理场耦合模型,揭示回流耦合作用下的轮轨燃弧动态演化规律,探明接地电流、钢轨端压等因素对绝缘节间拉弧的影响机制。同时提出一种新型绝缘节间拉弧抑制装置,仿真分析抑制效果。As the operating density,operating speed and traction power of high-speed trains continue to increase,the complex coupling between the train moving return current system and the track fixed return system causes frequent arcing between insulated joints when a train passing through the insulated joints.The arcing erodes the insulated joints,leading to faults such as track circuit crosstalk and crosstalk code,which seriously threaten the safety of running trains.Focusing on the arcing problem of insulation joints caused by the coupling of return current between the rail and train when high-speed trains passing rail insulation joints,this paper analyzed the topology of the return current path and the dynamic change of impedance when the wheelsets approach,straddle and leave the insulated joint,and constructed a three-dimensional equivalent circuit model of the“train-rail”mobile grounding system based on the actual impedance parameters of the traction system.An analysis was given on the dynamic changes of the current return path and magnitude of the grounded axle of the train running over the insulated joint.Based on the actual structural parameters of the system,a 3D multi-physical field coupling model of“bogie-rail”was constructed to reveal the dynamic evolution of the wheel-rail arc under the action of return current coupling,and to investigate the influence mechanism of ground current,rail end voltage and other factors on the arcing.At the same time,a new type of insulation joint arcing suppression device was proposed to analyze the suppression effect by simulation.

关 键 词：高速列车 “车-轨”移动接地系统 绝缘节间拉弧 烧蚀机制 拉弧抑制 

分 类 号：TM922.3[电气工程—电力电子与电力传动] U223.6[交通运输工程—道路与铁道工程]