电力机车变压器励磁涌流及其影响分析  

Analysis on Inrush Current of Electric Locomotive Transformer and Its Effects

作　　者：赵元哲[1] 李群湛[1] 周福林[1] 彭飞 ZHAO Yuanzhe;LI Qunzhan;ZHOU Fulin;PENG Fei(College of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China;Electric Power Research institute,State Grid Shandong Electric Power Company,Jinan 250002,China)

机构地区：[1]西南交通大学电气工程学院,成都610031 [2]国网山东省电力公司电力科学研究院,济南250002

出　　处：《电力系统及其自动化学报》2018年第3期25-34,共10页Proceedings of the CSU-EPSA

基　　金：中国铁路总公司重点科技资助项目(2015J005-A);国家自然科学基金资助项目(U1134205)

摘　　要：为研究电气化铁道电力机车变压器的励磁涌流发生机理及其影响,建立了电力机车变压器合闸时刻的牵引供电系统等值电路,推导出变压器的磁链以及一、二次侧电压数学模型。并通过搭建仿真模型,分析机车变压器在不同条件下产生的励磁涌流的变化情况以及涌流对变压器一、二次侧电压的影响。仿真分析结果表明,,机车变压器在牵引网中合闸时会产生超过额定电流幅值的励磁涌流,过高的励磁涌流会造成变压器一、二次侧电压损失与严重畸变;牵引网电压、机车位置、变压器容量以及剩磁等系统参数的改变会对励磁涌流大小以及涌流对电压造成的畸变程度造成影响。研究结果为车网系统出现的异常跳闸现象提供参考。To study the mechanism of inrush current from an electric locomotive transformer used in electrified railway and its effects,an equivalent circuit of traction power supply system is established when the locomotive transformer is closing.The mathematical models of the flux of the transformer and the primary and secondary side voltages are formulated.A simulation model is built to analyze the changes of inrush current generated by the locomotive transformer under different conditions,as well as its effect on the primary and secondary side voltages of the transformer.Simulation results show that the locomotive transformer can experience an inrush current which is larger than the rated current amplitude when the transformer is closing in the traction network,and an over-high inrush current can cause voltage loss and a serious distortion on the primary and secondary side voltages of the transformer;the system parameters,such as traction network voltage,locomotive position,transformer capacity and transformer remanence,can influence the inrush current and its effects on the voltage distortion.The research in this paper provides reference for the abnormal tripping phenomenon in the traction power supply system.

关 键 词：机车变压器 励磁涌流 牵引网电压 高次谐波 

分 类 号：U224.2[交通运输工程—道路与铁道工程]