Modulated Model Predictive Control for a Seven-Level Cascaded H-Bridge Back-to-Back Converter

Abstract

Multilevel converters are known to have many advantages\ud for electricity network applications. In particular, cascaded\ud H-bridge converters are attractive because of their inherent\ud modularity and scalability. Predictive control for power converters\ud is advantageous as a result of its applicability to discrete system\ud and fast response. In this paper, a novel control technique, named\ud modulated model predictive control, is introduced with the aim\ud to increase the performance of model predictive control. The\ud proposed controller addresses a modulation scheme as part of the\ud minimization process. The proposed control technique is described\ud in detail, validated through simulation and experimental testing,\ud and compared with dead-beat and traditional model predictive\ud control. The results show the increased performance of the modulated\ud model predictive control with respect to the classic finite\ud control set model predictive control in terms of current waveform\ud total harmonic distortion (THD). Moreover, the proposed controller\ud allows a multi-objective control, with respect to dead-beat\ud control that does not present this capabilit

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