基于电容耦合电压的全并联AT供电牵引网故障性质识别  

Identification of Fault Characteristics of Traction Network with Full Parallel AT Power Supply Based on Capacitance Coupling Voltage

作　　者：李原 林国松[1] 郭海涛 李志宇 LI Yuan;LIN Guosong;GUO Haitao;LI Zhiyu

机构地区：[1]西南交通大学电气工程学院 [2]中国铁路广州局集团有限公司

出　　处：《电气化铁道》2022年第6期21-25,共5页Electric Railway

基　　金：四川省自然科学基金(2022NSFSC0405)。

摘　　要：高速铁路牵引网发生故障时,馈线保护跳闸后,不进行故障识别直接进行一次重合闸,在永久性故障情况下,给牵引供电系统带来二次冲击。本文分析了考虑导线间存在耦合电容的全并联AT供电牵引网模型,得到了不同故障类型下变电所牵引网侧电压的表达式,提出了一种牵引供电广域保护测控条件下基于故障跳闸后导线电容耦合电压的故障性质识别方法,最终实现牵引网故障后的自适应重合闸功能。基于Matlab/Simulink平台建立高速铁路牵引供电系统仿真模型,在不同故障类型、不同过渡电阻的情况下,仿真模拟永久性和瞬时性故障,仿真结果验证了所提识别方法的合理性。When the high-speed railway traction network fails,the primary reclosing is directly conducted after tripping of feeder protection without fault identification,this will induce secondary impact to the traction power supply system in case of permanent fault.The paper analyzes the traction network model of full parallel AT power supply taking account of the coupling capacitance between conductors,obtains the expressions of the traction network side voltage of the substation under different fault types,and proposes a method for identification of characteristics of faults based on the conductor capacitance coupling voltage after fault tripping under the condition of traction power supply wide area protection measurement and control,and finally realizes the adaptive reclosing function after the traction network fault.The simulation model of high-speed railway traction power supply system is established based on Matlab/Simulink platform.Permanent and transient faults are simulated under different fault types and transition resistances.The simulation results verify the rationality of the proposed identification methods.

关 键 词：自动重合闸 全并联AT供电方式 瞬时性故障 永久性故障 

分 类 号：U223.8[交通运输工程—道路与铁道工程]