【摘要】 利用Matlab/Simulink仿真软件,搭建了AT牵引供电系统的车-网联合仿真模型,并多角度分析其对电网谐波的影响.首先建立了考虑阻抗和导纳影响的牵引网集中参数模型,在此基础上搭建了全并联AT牵引供电系统仿真模型,之后将搭建的SS9型、CRH2型牵引负荷仿真模型连接在AT供电系统模型中.利用该车-网联合模型,仿真分析牵引负荷在不同位置、数量及型号下电网的谐波电流、电压的总畸变率.仿真结果表明该模型能更精确得反映牵引供电系统对电网谐波影响的实际情况.更多还原

【Abstract】 A train-network coupling simulation model of AT traction power supply system is built,and the impacts of it on power harmonics are analyzed from multiple perspectives in Matlab/Simulink software. Firstly,lumped parameter model of traction network is built considering impacts of impedance and admittance. Based on this model,all-parallel AT traction power supply system simulation model is built,and the AT traction power supply system model coupled with the built electric locomotive model containing SS9,CRH2 became train-network coupling simulation mode. With the united model,the total harmonic distortion( THD) of power grid is analyzed under three conditions which include different locomotive position,different locomotive number and different type. Simulation result shows that the united model can more accurately analyze impacts of traction power supply system on power grid,and the simulation result is more realistic.更多还原