高速铁路牵引供电系统电磁暂态建模及行波特性分析  

Electromagnetic transient modeling and traveling wave property analysis of traction power supply system in high-speed railway

作　　者：高黎明[1] GAO Liming(China Railway Fourth Survey and Design Institute Group Co.,Ltd.,Wuhan 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《北京交通大学学报》2023年第5期107-116,共10页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家重点研发计划(2021YFB2601502);中国国家铁路集团有限公司科技研发项目(N2023G018)。

摘　　要：针对高速铁路牵引供电系统中牵引网多导线耦合结构复杂,造成故障定位时电磁暂态难以分析的问题,采用PSCAD/EMTDC仿真软件实现牵引供电系统的电磁暂态建模并对其行波特性展开分析.根据实际参数搭建全并联AT牵引供电系统,重点建立牵引网的精细化模型,对上、下行牵引网10余条导体进行耦合建模,通过实测故障数据分别对金属性、高阻接地2种典型故障下的模型进行验证.同时考虑馈电线长度、过渡电阻值、故障位置与雷击电流4种因素对故障行波畸变程度的影响并进行仿真分析.研究结果表明:牵引网故障行波的暂态波动不受馈电线长度因素的干扰,但过渡电阻值、故障位置以及雷击电流的变化对故障行波传播时的衰减与畸变程度有较为明显的影响.本文研究的故障行波特性可为后续提高牵引网故障定位算法的准确性提供参考.In response to the complex coupling structure of multiple conductors in the traction power supply system of high-speed railways,which poses challenges in analyzing electromagnetic transients during fault location,this study employs PSCAD/EMTDC simulation software to achieve electromagnetic transient modeling of the traction power supply system and analyze its traveling wave properties.The full-parallel AT traction power supply system is built according to the actual parameters,with a focus on establishing a refined model of the traction network.Coupling modeling of over 10 conductors from the upper and lower traction network is performed.Two typical faults,namely metallic property and high-resistance ground-ing,are separately verified through measured fault data.Simultaneously,the simulation analysis considers the impact of length for feed line,transition resistance,fault location,and lightning current on the degree of distortion in fault traveling waves.The results show that the transient fluctuation of fault traveling waves in the traction network remains unaffected by length for feed line.However,transition resistance,fault location,and lightning current significantly influence the attenuation and distortion degree during fault traveling wave propagation.The fault traveling wave properties studied in this paper serve as a reference for improving the accuracy of traction network fault location algorithms.

关 键 词：牵引供电系统 电磁暂态建模 PSCAD/EMTDC 行波特性 

分 类 号：TM922.3[电气工程—电力电子与电力传动]