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

doi:10.1109/IPEMC-ECCEAsia48364.2020.9367875

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

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding › peer-review

7 Citations (Scopus)

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 language	English
Title of host publication	2020 IEEE 9th International Power Electronics and Motion Control Conference (IPEMC2020-ECCE Asia)
Publisher	IEEE
Pages	1758-1764
Number of pages	7
ISBN (Electronic)	978-1-7281-5301-8
ISBN (Print)	978-1-7281-5302-5
DOIs	https://doi.org/10.1109/IPEMC-ECCEAsia48364.2020.9367875
Publication status	Published - 9 Mar 2021
Externally published	Yes
Event	2020 IEEE 9th International Power Electronics and Motion Control Conference - Nanjing, China Duration: 29 Nov 2020 → 2 Dec 2020

Conference

Conference	2020 IEEE 9th International Power Electronics and Motion Control Conference
Abbreviated title	IPEMC2020-ECCE Asia
Country/Territory	China
City	Nanjing
Period	29/11/20 → 2/12/20

Bibliographical note

Publisher Copyright:
© 2020 IEEE.

Funding

This work is funded by the UK EPSRC National Center for Power Electronics under grant EP/R004137/1 and the Royal Academy of Engineering under the Research Chairs and Senior Research Fellowships Scheme.

Funders	Funder number
EPSRC Centre for Power Electronics	EP/R004137/1
Royal Academy of Engineering, The

Keywords

multilevel converter
flying capacitor
voltage balancing
5 level
redundant level modulation

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10.1109/IPEMC-ECCEAsia48364.2020.9367875

Cite this

Capacitor Voltage Balancing Algorithm with Redundant Level Modulation for a Five Level Converter with Reduced Device Count. / Wang, Jun; Wei, Chen ; Zhou, Wenzhi et al.
2020 IEEE 9th International Power Electronics and Motion Control Conference (IPEMC2020-ECCE Asia). IEEE, 2021. p. 1758-1764.

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding › peer-review

Wang, J, Wei, C, Zhou, W & Yuan, X 2021, Capacitor Voltage Balancing Algorithm with Redundant Level Modulation for a Five Level Converter with Reduced Device Count. in 2020 IEEE 9th International Power Electronics and Motion Control Conference (IPEMC2020-ECCE Asia). IEEE, pp. 1758-1764, 2020 IEEE 9th International Power Electronics and Motion Control Conference , Nanjing, China, 29/11/20. https://doi.org/10.1109/IPEMC-ECCEAsia48364.2020.9367875

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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",

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AB - 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

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

Abstract

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Bibliographical note

Funding

Keywords

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