A Novel Dual-Mode Switched-Capacitor Five-Level Inverter with Common-Ground Transformerless Concept

Barzegarkhoo, R; Siwakoti, YP; Aguilera, RP; Khan, MNH; Lee, SS; Blaabjerg, F

A Novel Dual-Mode Switched-Capacitor Five-Level Inverter with Common-Ground Transformerless Concept

Barzegarkhoo, R Siwakoti, YP Aguilera, RP Khan, MNH Lee, SS Blaabjerg, F

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Publisher:: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Publication Type:: Journal Article
Citation:: IEEE Transactions on Power Electronics, 2021, 36, (12), pp. 13740-13753
Issue Date:: 2021-12-01

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Field	Value	Language
dc.contributor.author	Barzegarkhoo, R
dc.contributor.author	Siwakoti, YP
dc.contributor.author	Aguilera, RP
dc.contributor.author	Khan, MNH
dc.contributor.author	Lee, SS
dc.contributor.author	Blaabjerg, F
dc.date.accessioned	2022-02-25T19:07:23Z
dc.date.available	2022-02-25T19:07:23Z
dc.date.issued	2021-12-01
dc.identifier.citation	IEEE Transactions on Power Electronics, 2021, 36, (12), pp. 13740-13753
dc.identifier.issn	0885-8993
dc.identifier.issn	1941-0107
dc.identifier.uri	http://hdl.handle.net/10453/154853
dc.description.abstract	Transformerless (TL) grid-connected photovoltaic (PV) inverters with a common-ground (CG) circuit architecture exhibit some excellent features in removing the leakage current concern and improving the overall efficiency. However, the ability to cope with a wide range of input voltage changes while maintaining the output voltage in a single power conversion stage is a key technological challenge. Considering this, the article at hand proposes a novel dual-mode switched-capacitor five-level (DMSC5L)-TL inverter with a CG feature connected to the grid. The proposed topology is comprised of a single dc source and power diode, three capacitors, four unidirectional, and three bidirectional power switches. Based on the series-parallel switching conversion of the involved switches, the proposed DMSC5L-TL inverter can generate five distinctive output voltage levels during both the boost and buck operation modes with a self-voltage balancing operation for the involved capacitors. A simple dead-beat continuous current controller (DB3C) modulation technique is also used to handle both the active and reactive power exchange while ensuring a fixed switching frequency operation. The proposed circuit description with its DB3C details, the design guidelines with a comparative study, and some experimental results are also given to show the feasibility of the proposed solution for the practical applications.
dc.language	English
dc.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
dc.relation.ispartof	IEEE Transactions on Power Electronics
dc.relation.isbasedon	10.1109/TPEL.2021.3074517
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0906 Electrical and Electronic Engineering
dc.subject.classification	Electrical & Electronic Engineering
dc.title	A Novel Dual-Mode Switched-Capacitor Five-Level Inverter with Common-Ground Transformerless Concept
dc.type	Journal Article
utslib.citation.volume	36
utslib.for	0906 Electrical and Electronic Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2022-02-25T19:07:17Z
pubs.issue	12
pubs.publication-status	Published
pubs.volume	36
utslib.citation.issue	12

Abstract:

Transformerless (TL) grid-connected photovoltaic (PV) inverters with a common-ground (CG) circuit architecture exhibit some excellent features in removing the leakage current concern and improving the overall efficiency. However, the ability to cope with a wide range of input voltage changes while maintaining the output voltage in a single power conversion stage is a key technological challenge. Considering this, the article at hand proposes a novel dual-mode switched-capacitor five-level (DMSC5L)-TL inverter with a CG feature connected to the grid. The proposed topology is comprised of a single dc source and power diode, three capacitors, four unidirectional, and three bidirectional power switches. Based on the series-parallel switching conversion of the involved switches, the proposed DMSC5L-TL inverter can generate five distinctive output voltage levels during both the boost and buck operation modes with a self-voltage balancing operation for the involved capacitors. A simple dead-beat continuous current controller (DB3C) modulation technique is also used to handle both the active and reactive power exchange while ensuring a fixed switching frequency operation. The proposed circuit description with its DB3C details, the design guidelines with a comparative study, and some experimental results are also given to show the feasibility of the proposed solution for the practical applications.

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http://hdl.handle.net/10453/154853