无差拍电流预测控制的PWM整流器仿真研究

Simulation research of deadbeat predictive current control for PWM rectifier

通过对PWM整流器控制方法的分析,提出了一种新的无差拍电流预测控制策略。与传统的电流预测控制相比,该方法通过对幅值和相位的补偿,改善了传统控制方法所存在的初值问题和直流漂移问题;并且为了进一步提高系统的可靠性,降低整个系统的成本,采用了基于虚拟磁链的无电网电压传感器的控制方法来确定电网电压的相位。最后在Matlab软件中对其主电路和控制回路进行了建模与仿真分析,验证了系统设计的可行性。

In this paper,some control methods of PWM rectifier were analyzed.By comparing these methods,a new deadbeat predictive current control method was proposed.Compared with traditional current predictive control,this method improved initial value and DC drift problem by using amplitude and phase compensation;in order to further improve the reliability and reduce the cost of all system,a non-voltage sensor virtual flux was used to determine the voltage phase.At the same time,Matlab-Simulink software was used to model and simulate the main circuit and control circuit,.The simulation results comply with the design requirements and verify the feasibility of the system design.