摘要
为研究电气化铁道电力机车变压器和应涌流产生机理,建立了牵引供电系统、合闸电力机车以及运行电力机车的数学模型,利用Laplace变换求解出机车变压器磁链的解析解。通过搭建车网仿真平台分析了合闸变压器和运行变压器的磁链变化过程以及多种条件下和应涌流的变化规律,得到了影响和应涌流变化的关键因素,并分析了励磁涌流以及和应涌流对牵引网电压的影响。分析结果表明了合闸电力机车的励磁涌流会造成运行电力机车出现和应涌流现象,并造成牵引网电压发生严重跌落和畸变,为车网系统出现的异常跳闸现象提供参考。
In order to research the mechanism of sympathetic inrush occurring in electric locomotive transformer, the mathematical model including traction power supply system, closing locomotive and operating locomotive is established, flux linkage analytical solutions of locomotives transformers flux are obtained by using Laplace transform. The flux variety processes of closing transformer and operating transformer are analyzed though building simulation model. By studying variation of sympathetic inrush under different conditions, the influencing factors of sympathetic inrush are obtained, and the influence of the inrush current and sympathetic on traction network voltage is analyzed. The results show that the inrush current of closing electric locomotive could cause sympathetic inrush of the operating electric locomotive and make the voltage of traction network drop and seriously distort, which provide a reference for abnormal tripping of traction power supply system.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2017年第12期44-52,共9页
Power System Protection and Control
基金
国家自然科学基金(U1134205)
中国铁路总公司重点科技项目(2015J005-A)~~
关键词
电力机车
变压器
和应涌流
磁链
直流电压
electric locomotive
transformer
sympathetic inrush
flux linkage
DC voltage
