Abstract:

Abstract: The basic principle of the three-phase voltage-source PWM rectifier was analyzed and the mathematical model was built.Aiming at the problem that traditional double-loop PI contol is difficult to achieve good contorl effect,a control strategy that the outer control loop is based on feed-forword compensation with output voltage feed-back control and the current-loop is based on sliding-mode control is studied.Using the voltage loop keep the DC voltage stability and control the recitifer’s power flow, and the current loop contorl AC current tracking with the AC voltage’s phase,then the reversible flow of energy and unity power factor are achieved.Finally, simulation results of the MATLAB/SIMULINK show the feasibilty and effectiveness of the contol strategy.

Key words: Key words: PWM rectifier, feed-forward control, sliding-mode control