基于非线性PI控制器电压型PWM整流器

his paper proposes a nonlinear PI controller for three-phase voltage source PWM rectifier,which is based on its model in synchronous reference frame.The DC bus voltage and the power factor of the PWM rectifier are regulated by three nonlinear PI controllers with high performance.The nonlinear controller, consisting of the nonlinear function of the error and the traditional PI regulator, improves the dynamic response as well as the robustness of the system.This controller is also easy to be realized. Compared with the traditional PI controllers, the simulation results show that this method can improve the dynamic performance of the system obviously.