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An enumeration-based model predictive control strategy for the cascaded H-bridge multilevel rectifier

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Details

Original languageEnglish
Pages (from-to)3480-3489
Number of pages10
JournalIEEE Transactions on Industrial Electronics
Volume61
Issue number7
DOIs
Publication statusPublished - Jul 2014
Publication typeA1 Journal article-refereed

Abstract

In this paper, a model predictive control strategy is adapted to the cascaded H-bridge (CHB) multilevel rectifier. The proposed control scheme aims to keep the sinusoidal input current in phase with the supply voltage and to achieve independent voltage regulation of the H-bridge cells. To do so, the switches are directly manipulated without the need of a modulator. Furthermore, since all the possible switching combinations are taken into account, the controller exhibits favorable performance not only under nominal conditions but also under asymmetrical voltage potentials and unbalanced loads. Finally, a short horizon is employed in order to ensure robustness; this way, the required computational effort remains reasonable, making it possible to implement the algorithm in a real-time system. Experimental results obtained from a two-cell CHB rectifier are presented in order to demonstrate the performance of the proposed approach.

Keywords

  • Cascaded H-bridge (CHB) multilevel rectifier, model predictive control (MPC), optimal control