基于空间矢量脉宽调制的列车充电机矢量控制方法仿真研究

Simulation Research on Vector Control Strategy Based on Space Vector Pulse Width Modulation Method for the On-board Charger of the Rail Vehicle

充电机是轨道车辆重要的车载电气设备,为实现轨道车辆车载充电机的高性能控制,本文针对一种AC/DC型双向充电机的矢量控制方法进行仿真研究。首先明确充电机矢量控制方法应实现的控制目标,其次从坐标变换、电压外环与电流内环PI调节器设计、空间矢量脉宽调制3方面阐述算法的基本原理,最后对算法控制动力电池充电的过程进行仿真验证。充电电压仿真结果与设定值相同,逆变侧的功率因数及谐波总含量满足车载充电机设计要求,证明在算法控制下充电机可以实现控制目标。

The on-board charger was one of important electrical equipment for the rail vehicle.In order to realize the high-performance control of the on-board charger of the rail vehicle,this paper conducted a simulation study on the vector control strategy for the AC/DC bidirectional charger.This paper firstly clarified the control objectives that should be achieved by the vector control strategy.Secondly,the basic theory of the strategy was detailed from three parts:the coordinate transformation,designing of outside voltage PI regulator and inside current PI regulator,and space vector pulse width modulation principle.Finally,the power battery’s charging process under control was verified by simulation.The simulation result of charging voltage arrived the set value,and the power factor and the total harmonic distortion of its inverter side met the design requirements of the on-board charger,which proved that the charger could achieve the target under the control strategy.