Abstract
Conventional AC-to-DC converters use diodes or thyristors. These rectifiers inject current harmonics distortion in power systems. Pulse-width modulation (PWM) rectifiers are a new generation of rectifiers that feature harmonics elimination, power factor correction, and DC voltage stabilization. Recently, model predictive control (MPC) has been applied to pulse-width modulation rectifiers. Model predictive control predicts the rectifier’s future behavior and determines the switching action optimizing it. There exist two types of model predictive control depending on the control variable, either the switching state finite control set (FCS) or the converter voltage continuous control set (CCS). Finite control set is more precise but suffers from variable switching frequency. On the other hand, the mathematical derivation of continuous control set is tedious and only valid under certain assumptions. In this chapter, we propose an enhanced predictive continuous control set based on direct power control (DPC) which ensures constant switching frequency and simpler derivation approach. Moreover, we compare the performances of conventional rectifiers and pulse-width modulation rectifiers using finite control set, traditional continuous control set, and the proposed continuous control set.
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