关键词: PWM整流器, 反向解耦, 内模控制, 鲁棒性

Abstract: For three-phase voltage-sourced PWM rectifier, a novel double closed loop control method is proposed in this paper, which is based on the mathematical model in synchronous rotating coordinate system. Considering the coupling characteristics, the inner-current loop adopted reverted decoupling internal model control (IMC) method and designed IMC-PI controller for the decoupled generalized controlled object, which could realize the complete decoupling of the nominal systems. On this basis, the IMC-PID controller was designed based on the simplified model of voltage loop. The simulation results show that the proposed method can ensure the complete decoupling of the system, reduce the controller′s tuning parameters, and provide better dynamic performance and robustness.

Key words: PWM rectifier, inverted decoupling, internal model control, robustness