单相PWM整流器电流解耦双闭环控制方法研究

Research on dual close-loop control of single-phase PWM rectifier based on current decoupling

针对单相两电平PWM整流器,在分析其工作原理的基础上,通过坐标变换建立了旋转坐标系下的数学模型,提出了一种基于电流解耦的双闭环控制策略,并在Matlab/Simulink软件平台上搭建了系统的仿真模型。仿真结果表明:在不同的运行条件下,单相PWM整流器能够实现直流母线电压恒定和近似单位功率因数运行,且具有良好的静态特性和动态响应性能,从而验证了该控制方法的正确性与可行性。

The working principle of single phase two-level PWM rectifiers was analyzed. The single-phase rectifier＇s mathematical model, which was established in the d-q frame via coordinate transformation, was made. A dual close-loop control based on current decoupling of this model was proposed. The simulation model of the system was built in Matlab/Simulink software platform. Simulation results show that single-phase PWM rectifier strategy can realize constant DC bus voltage and approximate unit power factor operation through this control strategy under different running conditions, and has a good static performance and dynamic response performance, which confirms the validity and feasibility of the control method.