A control scheme of current-source PWM rectifier with sliding-mode control under unbalanced operation conditions

In this paper, a new voltage unbalance correction scheme for the pulse-width modulation current-source rectifier is presented. By regulating the instantaneous active/reactive power, a constant dc-current without 100Hz ripple together with sinusoidal input current at controllable power factor are achieved. A current controller based on sliding-mode variable structure control in stationary frame is proposed, which achieves high performance current tracking in the fact of system uncertainties and disturbances. The existence and stability of sliding-mode is ensured by using a proper reaching law. The effectiveness of the proposed scheme is validated by simulation results.