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采用多导体传输线等效降阶法建立了CRH2型动车组和某实际复线自耦变压器(AT)牵引网车网联合仿真模型,仿真分析了动车组处于固定位置、动态运行、不同工况、不同功率时各种因素对牵引网谐振频率以及谐振点处谐波电流放大倍数的影响规律,并通过部分实测数据验证了所建模型和分析方法的有效性.最后提出采用C型滤波器来抑制谐波电流,在确保装设滤波器后车网系统达到良好电气匹配的基础上,给出了滤波器电气参数设计和安装位置选取方法,并对最佳位置分区所(SP)处加装滤波器后的牵引网谐波电流放大抑制效果进行了仿真验证.
The multi-conductor transmission line equivalent reduction method was used to establish a co-simulation model of the CRH2 EMU and an actual AT traction network. The simulation and analysis of the EMU’s fixed position, dynamic operation, different working conditions, different The influences of various factors on the resonance frequency of the traction network and the magnification of the harmonic current at the resonance point were investigated and the validity of the proposed model and analysis method was verified by some measured data.Finally, Wave current, after ensuring that the vehicle network system has good electrical matching after the filter is installed, the method of selecting the electrical parameters of the filter and the installation location is given, and the filter is installed at the SP After the traction network harmonic current amplification inhibitory effect of the simulation.