An indirect model predictive current control for a direct matrix converter with instantaneous reactive power minimization

Abstract

Controlling both input and output sides of the direct matrix converter using predictive control implies high computational cost due to the fact that it has twenty-seven available switching states and the needed of weighting factors. In this paper, an indirect model predictive current control strategy is proposed in order to simplify the computational cost while avoiding the use of weighting factors. The method is based on the fictitious dc-link concept, which has been used in the past for the classical modulation and control techniques of the direct matrix converter. Simulated results confirm the feasibility of the proposal proving that it is an feasible alternative to classical predictive control strategies in this converter.