A Hybrid Space-Vector Modulation Method for Harmonics and Current Ripple Reduction of Interleaved Vienna Rectifier

Abstract

Input current around zero-crossing point is distorted and the reduction of current ripple is limited when applying space-vector modulation (SVM) to the interleaved Vienna rectifier. In this article, a hybrid SVM method for two- channel interleaved Vienna rectifier is developed to reduce the harmonics distortion and current ripple. The topology of two-channel interleaved Vienna rectifier is introduced. The current distortion around the zero-crossing point and the ripple characteristics around the peak of the current with SVM are analyzed. Then, a zero-crossing clamped method is used to eliminate the current distortion in the sectors around the zero-crossing point. To reduce the current ripple, the phase-shifted angle of the carriers between two channels is modified in the sectors around the peak of the current. Furthermore, the realization of the proposed hybrid SVM method is presented in details. With the proposed hybrid SVM method, the current distortion is attenuated and the current ripple amplitude is reduced obviously without increasing the switching frequency. Finally, the performance of the proposed method is compared with the classical SVM methods in a two-channel interleaved Vienna rectifier prototype.