Dual closed-loop control for three-phase high-power-factor PWM rectifier

A simplified mathematic model of three-phase high-power-factor PWM(Pulse Width Mo-dulation) rectifier with voltage disturbance compensation is established,which exactly reflects the working state and can be easily implemented in the control system design.To meet the control requirement of the inner current loop,its PI(Proportional-Integral) regulation parameters are designed with the optimum ITAE value rule according to the ramp response characteristic,while to meet the control requirement of the outer voltage loop,its PI regulation parameters are designed with the optimum step response rule according to the step response characteristic.The simplified mathematic model and the proposed PI regulation parameter design methods are verified by simulation and experiments.