电压型PWM整流器直接功率控制系统

Direct Power Control System of Three Phase Boost Type PWM Rectifiers

根据三相电压型PWM整流器在dq两相同步旋转坐标系中的数学模型,建立整流器功率控制数学模型。根据功率控制数学模型,结合整流器直接功率控制(DPC)系统的特点,提出新的电压型PWM整流器直接功率控制系统的主电路交流侧滤波电感值、直流侧电压和直流侧电容值设计方法。根据整流器的数学模型,得到整流器DPC控制系统结构和控制器设计方法。同时,讨论了桥路损失和直流侧电容器的等效串联电阻(ESR)对整流器的影响。计算机仿真和实验表明,提出设计方法是可行的,具有应用参考价值。

This paper establishs the power control mathematical model of rectifier based on the mathematical model of three phase boost type PWM rectifier in synchronous dq coordinates. According to the power control mathematical model, the paper proposes a new design method of filter inductance in AC side , voltage and capacitance in DC side of main circuit for three phase boost type PWM rectifier by combining with the features of direct power control（DPC） system. Based on the models of rectifier, the control structure of rectifier DPC system and the design method of controller is obtained. Meanwhile, the paper discusses the influence of bridge loss and equivalent series resistance（ESR） of capacitor on rectifier. The design method is proved feasible by simulation and experiment and is available for reference in engineering.