PWM rectifier with inner power loop and outer capacitor energy loop based on Internal Model Control

PWM rectifier with capactitor's energy-power double close-loop control structure based on Internal Model Control (IMC) is proposed, mathematical model in synchronous dq coordinates and power control model for PWM rectifier are discussed, and cross-power decoupling is obtained based on IMC. The power IMC controllers are designed. In the outer voltage-loop, a voltage control strategy with which the capacitor's energy is taken as a variable is proposed, so the linearization control in the voltage loop is realized, and the dynamic response performance of the voltage is improved. Simulation results confirm the validity of the mentioned strategy.