Optimization of direct power control of three-phase active rectifiers by using multiple switching tables

Abstract

One of the best known control methods for three-phase active rectifiers is the so-called Direct Power Control (DPC). Control algorithm in DPC is based on the regulation of instantaneous active and reactive powers and incorporates a switching table where the successive optimal configurations of the rectifier are stored. Traditional DPC models use only one switching table within their control systems. In this study, a new DPC method is presented, based on the combination of two different switching tables. By using Simulink simulations, it is demonstrated that better dynamics and lower switching stress are achieved in the rectifier thanks to the use of the proposed method, in comparison to the simple switching table models.