Model predictive control of a flying capacitor converter with output LC filter for UPS applications

Peter Stolze, Daniël Du Toit, Males Tomlinson, Ralph Kennel, Toit Mouton

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Scopus citations

Abstract

This paper presents a model predictive control strategy for a three-level flying capacitor converter with output LC filter for UPS applications. In order to reduce the calculation effort (64 different switching possibilities for one prediction step) in a first step the best one of the 19 voltage vectors is determined. After that the best switching state which delivers this voltage vector is determined regarding the flying capacitor voltage balancing and the switching effort, making use of a hysteresis-based algorithm. A disturbance observer is used to estimate the output currents of the LC filter which are normally not measured. The proposed principle can be easily extended to flying capacitor converters with more than three voltage levels.

Original languageEnglish
Title of host publicationIEEE Africon'11
DOIs
StatePublished - 2011
EventIEEE Africon'11 - Victoria Falls, Livingstone, Zambia
Duration: 13 Sep 201115 Sep 2011

Publication series

NameIEEE AFRICON Conference

Conference

ConferenceIEEE Africon'11
Country/TerritoryZambia
CityVictoria Falls, Livingstone
Period13/09/1115/09/11

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