电气化铁路AT牵引供电方式电流分布的理论计算及仿真

Theoretical Calculation and Simulation of the Current Distribution of Electrified Railway with AT Traction Power Supply

以京沪高铁为背景,针对电气化铁路自耦变压器(AT)牵引供电方式,详细推导了单线运行和双线上、下行通过分区所并联运行时的牵引网电流分布的计算公式,并比较了忽略和计及保护线以及线路互感2种情况下电流分布的异同。基于MATLAB建立了牵引变压器和牵引网的仿真模型,通过仿真验证了电流分布公式的有效性。对于模拟机车实际运行情况,分析牵引网线路故障的影响具有参考价值。

At the background of Beijing-Shanghai express railway,for the autotransformer（AT） traction power supply,the calculation formula of current distribution in traction power grid in the signal line operation or double line up and down parallel operation were deduced and given in detail.And the current distribution with or without the line protection and mutual inductance were also compared.The simulation models of traction transformer and traction grid were established in MATLAB,and the simulation results proved the effectiveness of the calculation formula of current distribution.The results can provide references for analog of locomotive actual operation situation and analysis of influences of line faults in traction grid.