高速铁路全并联AT牵引网端口阻抗特性研究  

Research on Port Impedance Characteristics of High-speed Railway All Parallel Autotransformer Traction Network

作　　者：沈睿 韩正庆[1] 刘淑萍[1] 高仕斌[1] SHEN Rui;HAN Zhengqing;LIU Shuping;GAO Shibin(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》2023年第5期40-46,共7页Journal of the China Railway Society

基　　金：国家自然科学基金(52177116);四川省科技计划(2023JRDC0002)。

摘　　要：阻抗特性是全并联AT牵引网距离保护和故障测距的研究基础。为得到全并联AT牵引网端口阻抗特性,计及AT和牵引变压器漏抗,推导各端口阻抗表达式,分析各端口阻抗的差异,进而揭示过渡电阻、变压器参数对端口阻抗的影响规律。理论分析和仿真结果表明,各端口阻抗具有相同的变化趋势和相近的数值;各端口阻抗受过渡电阻影响相同且仅有电阻受影响;各端口阻抗都受到变压器漏抗影响,非故障端口阻抗在线路首端受变压器漏抗影响显著,故障端口阻抗在线路首端受变压器漏抗影响最小。Impedance characteristic is the research foundation of distance protection and fault location of all parallel autotransformer(AT)traction network.In order to obtain the impedance characteristics of all parallel AT traction network ports,based on leakage reactance of AT and traction transformer,the expressions of the impedance of each port were derived.The differences of the impedance of each port were analyzed,followed by the discussion on the effect of transition resistance and transformer parameters on the port impedance.Theoretical analysis and simulation results show that the impedance of each port has the same variation trend and similar values.The impedance of each port is affected by the transition resistance equally with only the resistance being affected.The impedance of each port is affected by the transformer leakage reactance.The impedance of non-fault port is significantly affected by the transformer leakage reactance at the first end of the line while the impedance of fault port is least affected by the leakage reactance at the first end of the line.

关 键 词：阻抗特性 全并联AT牵引网 距离保护 变压器漏抗 过渡电阻 

分 类 号：U224[交通运输工程—道路与铁道工程]