电力机车应急供电装置在无电区进行应急供电,需要兼顾不同型号机车对辅助供电不同电压频率的需求,其逆变器模块需要输出相对应频率且稳定的电压,本文在分析应急供电需求的基础上,建立了逆变器和用电负载的模型,推导了逆变器两端电压和电流的函数关系,并将函数表达式推导到α-β静止参考坐标系和d-q旋转坐标系中,计算出准确的电压和电流数量关系,从而实现电压电流双闭环控制。实验结果表明,该改进型控制算法比较简单,计算量少,便于在线实现,具有良好的动态和静态特性。

The emergency power supply device of electric locomotives supplies power in non-electrical areas.It is necessary to consider the different voltage and frequency requirements of different types of locomotives forauxiliary power supply.Their photovoltaic modules need to output corresponding frequency and stable voltage.Based on the analysis of emergency power supply requirements in this article,A model of the predictor and electrical load was established,and the functional relationship between the voltage and current in the middlepart of the predictor was deduced.The functional expression was deduced into a similar reference coordinatesystem and a d-q rotating coordinate system,and accurate experimental results were calculated to show that,the improved control algorithm is relatively simple,requires less calculation,can be implemented dynamicallyonline,and has good and static characteristics.