An overlapping multi-hexagon space vector modulation scheme for modular multilevel cascade converters

Ikenna Bruce Efika, Li Zhang, Alan Watson, Jon Clare

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

5 Citations (Scopus)

Abstract

This paper presents an adapted space vector modulation scheme for modular multilevel converters cascaded to higher levels. Instead of extending a single hexagon to the regions corresponding to the number of levels, this scheme uses multiple overlapping hexagons which are phase displaced relative to each other. The approach simplifies the modulation algorithm and brings flexibility in shaping the output voltage waveforms for different applications. The method is analyzed in simulation for modular multilevel cascaded flying capacitor converters in single star/single delta configurations, and is validated using an experimental two-tier cascaded converter. Output performance, including harmonic spectra, and the capacitor voltage balancing, compares well with those of other control schemes such as conventional multilevel SVM. A key feature is ease of extension to higher cascading levels without forfeiting overall performance.

Original languageEnglish
Title of host publicationProceedings 15th European Conference on Power Electronics and Applications, EPE 2013
PublisherIEEE
Number of pages11
ISBN (Print)9781479901166
DOIs
Publication statusPublished - 6 Sep 2013
Event2013 15th European Conference on Power Electronics and Applications, EPE 2013 - Lille, France
Duration: 2 Sep 20136 Sep 2013

Publication series

Name2013 15th European Conference on Power Electronics and Applications, EPE 2013

Conference

Conference2013 15th European Conference on Power Electronics and Applications, EPE 2013
CountryFrance
CityLille
Period2/09/136/09/13

Keywords

  • high voltage power converters
  • modulation strategy
  • multilevel converters
  • pulse width modulation
  • voltage source converter

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  • Cite this

    Efika, I. B., Zhang, L., Watson, A., & Clare, J. (2013). An overlapping multi-hexagon space vector modulation scheme for modular multilevel cascade converters. In Proceedings 15th European Conference on Power Electronics and Applications, EPE 2013 [6634486] (2013 15th European Conference on Power Electronics and Applications, EPE 2013). IEEE. https://doi.org/10.1109/EPE.2013.6634486