一种电压增益调节的中间直流过电压抑制方法研究

Research on a Method of Suppressing Intermediate DC Overvoltage by Adjusting Voltage Gain

鉴于同一供电区间容量大小以及供电品质的差异会带来动车组由于网压异常引起中间直流电压故障等控制问题,通过采用一种基于牵引变流器内部整流电压增益调节的方式,建立了CRH2型高速动车组整流器控制逻辑系统模型,并在此基础上给出了不同电压增益参数对中间直流过电压的抑制作用和故障报出的结果分析,研究结果表明,该电压增益调节方式能有效抑制由于网压波动带来的中间直流过电压的问题,为提高动车组运行质量起到关键作用。

In view of the difference in capacity and quality of power supply in the same power supply interval,it will bring about control problems such as the intermediate DC voltage failure of the EMU due to abnormal grid voltage.By adopting a method based on the internal rectification voltage gain adjustment of the traction converter,it is established CRH2 high-speed EMU rectifier control logic system model,and on this basis,the suppression effect of different voltage gain parameters on the intermediate DC overvoltage and the analysis of the results of the failure report are given.The research results show that the voltage gain adjustment method can effectively suppress The problem of intermediate DC overvoltage caused by grid voltage fluctuations plays a key role in improving the operating quality of EMUs.