PWM整流器PI参数设计

PI regulator and parameter design of PWM rectifier

根据PWM整流器在旋转dp坐标系中的简化数学模型,引入PI调节器和电网电压来解耦输入电流,建立电流环和电压环,分别简化各个环节得到电流和电压调节环的闭环传递函数,设计电流、电压调节器PI参数,分析各个环节的幅频和相频特性。用MATLAB给出仿真结果以及实验结果,验证了设计参数的合理性和正确性。

Based on simplified mathematic model of PWM rectifier with d-q rotation frame, input current is decoupled by introducing PI regulator and power network voltage. The voltage loop and current loop voltage are built. The close-loop transfer functions of voltage and current are gained by simplifying the different loops. PI parameters of current and voltage loops are designed. Amplitude, phase and frequency characteristic of close-loop regulator system are analyzed. The simulation results by MATLAB and the experimental curves are also given.