Performance analysis of AC-DC power converter using PWM techniques

Abstract

The AC-DC rectification has been accomplished by an uncontrollable diode rectifier or a line commutated phase controlled Thyristor Bridge. Both these converters offer a high reliability and simple structure they also have major inherent drawbacks. By controlling the firing angle, the DC voltage of the Thyristor Bridge can be regulated. Also power flow from the DC side to the AC side is possible, but because the polarity of the DC voltage must be reversed for this to occur. As a result, pulse width-modulated (PWM) rectifiers have been of particular interest and they have become attractive especially in industrial variable-speed drive applications in the power range from a couple of kilowatts up to several megawatts. This paper aims at the simulation study and analysis of Space Vector Modulation (SVM) and Direct Power Control (DPC) of three-phase AC-DC converter under various load conditions. © 2011 Published by Elsevier Ltd.