全并联AT牵引供电系统雷击故障测距多路径行波算法研究  

Research on Multi-path Traveling Wave Algorithm for Lightning Fault Location of All-parallel AT Traction Power Supply System

作　　者：钟汉华 陈剑云[1] 华敏 傅钦翠[1] 石杰 夏天 ZHONG Hanhua;CHEN Jianyun;HUA Min;FU Qincui;SHI Jie;XIA Tian(State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure,East China Jiaotong University,Nanchang 330013,China;Process and Technology Department,CRRC Qishuyan Locomotive Co.,Ltd.,Changzhou 213011,China)

机构地区：[1]华东交通大学省部共建轨道交通基础设施性能监测与保障国家重点实验室,江西南昌330013 [2]中车戚墅堰机车有限公司工艺技术部,江苏常州213011

出　　处：《铁道学报》2024年第1期60-71,共12页Journal of the China Railway Society

基　　金：国家自然科学基金(52362052);轨道交通基础设施性能监测与保障国家重点实验室开放课题(HJGZ2021111)。

摘　　要：针对AT变压器和并联结构导致行波传播路径复杂,行波波头性质难以有效识别和行波色散现象,线路频变参数特性导致波速不稳定的问题,提出一种基于多路径行波测距方法。基于上下行电流行波传播的差异性,利用电流相似度识别故障区段。探讨全并联AT牵引网结构对行波传播特性的影响,并对电流、电压行波传播路径进行标定。基于多路径电流、电压行波极性分析,筛选出用于故障测距的多路径行波,以推导出消去波速的测距方程。仿真表明:所提测距方法可以有效识别波头性质,且计算故障距离基本与波速无关,不受牵引网区段长度、结构影响。A multi-path traveling wave fault location method was proposed to address the problems of complex traveling wave propagation paths caused by AT transformers and parallel structures,difficulty in effectively identifying the nature of traveling wave front,and wave speed instability caused by the phenomenon of traveling wave dispersion and line frequency variation parameter characteristics.Based on the differences between the bidirectional lines in current wave propagation,the method used current similarity to identify fault sections.The influence of the all-parallel AT traction network structure on the traveling wave propagation characteristics was explored and the current and voltage traveling wave propagation paths were calibrated.Finally,based on the polarity analysis of the multi-path current and voltage traveling waves,the multi-path traveling waves for fault ranging were selected to derive the ranging equations for eliminating the wave speed.The simulations show that the proposed ranging method can identify the nature of wave front effectively,and the calculated fault distance,which is basically independent of the wave speed,is not affected by the length and structure of the traction network section.

关 键 词：雷击故障 多路径行波 全并联AT牵引供电系统 行波极性 故障测距 

分 类 号：U223[交通运输工程—道路与铁道工程]