Analysis of a voltage balancing technique with reduced switching transitions in a flying capacitor multilevel converter

Amer M. Y. M. Ghias, Josep Pou, Vassilios G. Agelidis, Mihai Ciobotaru

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

Abstract

This paper reports the analysis of a voltage balancing technique based on optimal switching transitions for a flying capacitor (FC) multilevel converter using phase disposition pulse-width modulation. Since multiple switching transitions between two consecutive voltage levels may be available, such a redundancy is used to regulate the FC voltages at their desired levels. For the selection of the transitions, two techniques are studied and compared in terms of capacitor voltage ripples and switching frequencies. In the first technique, called optimum transition voltage balancing technique, the transitions between two consecutive voltage levels that produce high switching frequencies are avoided. On the other hand, all the transitions between consecutive levels are considered in the second technique. It is therefore called unrestricted voltage balancing technique. Study analyses are conducted by simulation considering all the possible modulation indices and load power factors.
Original languageEnglish
Title of host publication2013 Australasian Universities Power Engineering Conference (AUPEC)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages6
ISBN (Electronic)9781862959132
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event2013 Australasian Universities Power Engineering Conference, AUPEC 2013 - Hobart, TAS, Australia
Duration: 29 Sep 20133 Oct 2013

Other

Other2013 Australasian Universities Power Engineering Conference, AUPEC 2013
CountryAustralia
CityHobart, TAS
Period29/09/133/10/13

Keywords

  • Flying capacitor converter
  • Multilevel converter
  • Pulse-width modulation
  • Switching transition
  • Voltage control

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