Model predictive control of a three phase PWM boost rectifier under extreme unbalanced conditions

摘要

In this paper, a predictive current control algorithm for an active PWM boost type rectifier under asymmetrical supply conditions is proposed. The proposed current control algorithm provides elimination of low order harmonics in line currents and output voltage under extremely unbalanced input voltages and impedances. Moreover, the supply side power factor can be adjusted in a wide range. Simulation results demonstrate excellent performance of the proposed algorithm, regardless of the degree of asymmetry in input voltages and impedances. Results obtained using model predictive control are compared with those obtained using previously developed methods. Analysis of current distortion and switching stress demonstrate the merits of the proposed predictive controller.