Phase locked loop control of a three-phase single-stage power converter

Abstract

A three-phase single-stage power converter has been proposed and is shown to provide some benefits over the traditional single-phase two-stage telecommunication power converter designs. It has the ability to conform to all the required telecommunication standards, while only employing a single-stage design with reduced controller complexity and with the expectation of yielding efficiency advantages. An improved three-phase phase locked loop design is discussed with performance results showing its robust nature. A pseudo derivative feedback controller is introduced, with simulation results showing its ability to maintain a constant output voltage under load disturbances. Complete digital control of the three-phase single-stage power converter implementation is also detailed in the paper.