Capacitor Voltage Balancing Algorithm with Redundant Level Modulation for a Five Level Converter with Reduced Device Count

Jun Wang, Chen Wei, Wenzhi Zhou, Xibo Yuan*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

2 Citations (Scopus)
19 Downloads (Pure)

Abstract

A new five-level multilevel converter topology with a reduced device count has been brought up for medium-voltage inverter applications. However, as an inherent issue of this simplified topology, the voltage balancing of flying capacitors is challenging. Conventional approach utilizing redundant switching states cannot achieve the balancing under a unity power factor and high modulation indexes. This paper proposes a novel voltage balancing algorithm to solve this issue, which is based on Redundant Level Modulation (RLM). The proposed algorithm is verified by simulation and experiment. This novel voltage balancing scheme overcomes the limitations of the conventional approach and enables this topology to operate at high power factors and high modulation indexes.
Original languageEnglish
Title of host publication2020 IEEE 9th International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1758-1764
Number of pages7
ISBN (Electronic)978-1-7281-5301-8
DOIs
Publication statusPublished - 9 Mar 2021
EventInternational Power Electronics and Motion Control Conference (IPEMC), ECCE-Asia 2020 - Virtual online meeting, Nanjing, China
Duration: 29 Nov 20202 Dec 2020

Publication series

Name2020 IEEE 9th International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia

Conference

ConferenceInternational Power Electronics and Motion Control Conference (IPEMC), ECCE-Asia 2020
Country/TerritoryChina
CityNanjing
Period29/11/202/12/20

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  • Converter Architectures

    Yuan, X.

    1/11/1731/10/21

    Project: Research

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