Voltage balancing of a five-level flying capacitor converter using optimum switching transitions

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

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

8 Citations (Scopus)

Abstract

The flying capacitor (FC) multilevel converter requires a capacitor voltage balancing mechanism for proper operation. This paper proposes a voltage balancing scheme for a five-level FC converter based on phase disposition pulse-width modulation (PD-PWM) using transitions that produce the minimum number of switching events. This strategy will be called optimal-transition voltage balancing (OTVB) scheme. Since multiple optimum switching transitions between two consecutive voltage levels may be available, such a redundancy is used to regulate the FC voltages at their desired levels. Those transitions that produce more switching events are avoided. The rest of transitions are evaluated by means of a cost function and the one that produces the minimum value is selected. Simulation results show a significant reduction of the average switching frequency as compared to the use of the optimal-state voltage balancing (OSVB) scheme, while maintaining the balance of the FC voltages. Moreover, the proposed PD-PWM voltage balancing strategy is robust to static and dynamic load conditions.
Original languageEnglish
Title of host publicationProceedings IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages5006-5012
Number of pages7
ISBN (Electronic)9781467324205, 9781467324212
ISBN (Print)9781467324199
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event38th Annual Conference of the IEEE Industrial Electronics Society, IECON 2012 - Montreal, Canada
Duration: 25 Oct 201828 Oct 2018

Conference

Conference38th Annual Conference of the IEEE Industrial Electronics Society, IECON 2012
CountryCanada
CityMontreal
Period25/10/1828/10/18

Fingerprint Dive into the research topics of 'Voltage balancing of a five-level flying capacitor converter using optimum switching transitions'. Together they form a unique fingerprint.

Cite this