Finite-fixed switching predictive control technique for a 7-level cascaded H-bridge multilevel active power filter. A comparative study

Abstract

This paper presents a finite-fixed predictive control technique applied to the three-wire cascade H-bridge multilevel converters for active power filter applications. The focus of this paper is to examine the impacts of the use of optimum modulation techniques combined with predictive current control in order to increase the control performance in terms of reactive power compensation and total harmonic distortion. The proposed approach predicts the future behavior of the control actions considering all possible switching states considering an increased prediction horizon in order to select the optimal switching vector by using an optimization process considering a defined cost function. Finally, the proposed control technique applies an optimum modulation technique. The effectiveness of the proposed control approach will be evaluated through simulations.