Short-Horizon Model Predictive Modulation of Three-Phase Voltage Source Inverters

Christopher D. Townsend, Galina Mirzaeva, Graham C. Goodwin

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Traditional model predictive control cost functions, when utilizing long prediction horizons ( $N\geq 10$) in power inverter applications, have demonstrated harmonic performances approaching that of schemes based on offline-generated optimal pulse patterns. However, long prediction horizons often prohibitively increase computational load. A different approach to maximizing harmonic performance is taken in this paper. It is shown that shaping the output voltage spectra using a simple feedback mechanism can significantly reduce the length of the required prediction horizon, facilitating a feasible computational load. When a short-horizon cost function is augmented by the feedback mechanism an excellent tradeoff between harmonic performance and switching loss is achieved, even with a prediction horizon of one. It is also shown that the feedback mechanism can be used to improve input reference tracking. Experimental verification of the proposed modulator is performed on a two-level three-phase inverter.

Original languageEnglish
Article number8030145
Pages (from-to)2945-2955
Number of pages11
JournalIEEE Transactions on Industrial Electronics
Volume65
Issue number4
DOIs
Publication statusPublished - 1 Apr 2018
Externally publishedYes

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