Predictive Current Control of Three-Phase PWM Rectifiers Using Virtual Voltage Vectors

This paper presents a novel predictive current control method for three-phase PWM rectifier using virtual voltage vectors. The method uses the discrete-time model of the system to calculate the desired value of the converter voltage, and then select an appropriate voltage vector among all possible vectors to force the future current to be equal to its reference. In order to improve system performance without changing main circuit topology, virtual voltage vector synthesized by time-weighted averaging of basic vectors is introduced in this paper. The combination of virtual voltage vectors and basic vectors can make an optimum space vector for PWM rectifier, and as a result, it could bring ripple reduction in system current. Both simulation and experimental results are shown to verify., the performance of the proposed control method. Copyright (C) 2010 Praise Worthy Prize S.r.l. - All rights reserved.