Instantaneous power based control of three-phase PWM rectifier under distorted source voltages

This paper presents a novel control method for PWM boost rectifier based on instantaneous power. Unlike most of the existing control strategies implemented in synchronous or p-q (active-reactive power) frame, the proposed method can provide unity power factor on the AC side in stationary frame. Rotating transformation and phase detection are eliminated, offering a very simple solution. Based on the analysis of the instantaneous powers, a new method for current harmonic elimination is also proposed, which entails sinusoidal input currents under distorted source voltages. Compared with the conventional harmonic suppressing methods, the proposed scheme has a simple structure. Moreover, fast dynamic response is achieved in the presented algorithm owing to instantaneous power control. Simulation and experimental results on a 30 kVA PWM rectifier show satisfactory performance of the presented method both in steady and dynamic state.