An Interleaved Single-Stage Switched-Boost Common-Ground Multilevel Inverter: Design, Control, and Experimental Validation

Farhangi, M; Barzegarkhoo, R; Lee, SS; Aguilera, RP; Lu, D; Siwakoti, YP

An Interleaved Single-Stage Switched-Boost Common-Ground Multilevel Inverter: Design, Control, and Experimental Validation

Farhangi, M Barzegarkhoo, R Lee, SS Aguilera, RP Lu, D

Siwakoti, YP

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Publisher:: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Publication Type:: Journal Article
Citation:: IEEE Transactions on Industry Applications, 2024, 60, (3), pp. 4168-4182
Issue Date:: 2024-05-01

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Field	Value	Language
dc.contributor.author	Farhangi, M
dc.contributor.author	Barzegarkhoo, R
dc.contributor.author	Lee, SS
dc.contributor.author	Aguilera, RP
dc.contributor.author	Lu, D https://orcid.org/0000-0003-2145-0580
dc.contributor.author	Siwakoti, YP
dc.date.accessioned	2024-08-07T04:57:17Z
dc.date.available	2024-08-07T04:57:17Z
dc.date.issued	2024-05-01
dc.identifier.citation	IEEE Transactions on Industry Applications, 2024, 60, (3), pp. 4168-4182
dc.identifier.issn	0093-9994
dc.identifier.issn	1939-9367
dc.identifier.uri	http://hdl.handle.net/10453/180252
dc.description.abstract	Multilevel inverters (MLIs) with a common-ground (CG) circuit design and a switched-boost (SB) technique are of interest in transformerless grid-connected applications due to the enhanced overall efficiency, higher power density and reduced leakage current concern. Utilization of the SB technique in MLIs leads to obtaining a single-stage power conversion platform with a dynamic voltage boosting feature. Drawing a continuous input current and spike-free current stress of the devices are two additional features of SB-based MLIs. Regarding the current state-of-the-art contributions, an interleaved CGSB-based MLI is introduced in this work. The main benefits of the proposed topology are larger injected grid current handling capability with a reduced current stress, uniform peak voltage stress across the devices, bidirectional power flow operation, controllable power sharing, and generalization capability to realize any number of output voltage levels. Through a modular design with a phase-shifted PWM technique, the injected grid current is shared among the modules, while the size of the grid-interface filters is reduced, leading to establishing a practical design with enhanced overall efficiency. The working principle of the proposed converter is discussed in detail. Design guidance, comparative study and extensive closed-loop experimental results obtained from a 5.1 kW grid-tied laboratory-built prototype are then given to validate the feasibility and performance of the proposed solution.
dc.language	English
dc.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
dc.relation	http://purl.org/au-research/grants/arc/DP210101382
dc.relation.ispartof	IEEE Transactions on Industry Applications
dc.relation.isbasedon	10.1109/TIA.2024.3369010
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	08 Information and Computing Sciences, 09 Engineering
dc.subject.classification	40 Engineering
dc.title	An Interleaved Single-Stage Switched-Boost Common-Ground Multilevel Inverter: Design, Control, and Experimental Validation
dc.type	Journal Article
utslib.citation.volume	60
utslib.for	08 Information and Computing Sciences
utslib.for	09 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	2024-08-07T04:57:10Z
pubs.issue	3
pubs.publication-status	Published
pubs.volume	60
utslib.citation.issue	3

Abstract:

Multilevel inverters (MLIs) with a common-ground (CG) circuit design and a switched-boost (SB) technique are of interest in transformerless grid-connected applications due to the enhanced overall efficiency, higher power density and reduced leakage current concern. Utilization of the SB technique in MLIs leads to obtaining a single-stage power conversion platform with a dynamic voltage boosting feature. Drawing a continuous input current and spike-free current stress of the devices are two additional features of SB-based MLIs. Regarding the current state-of-the-art contributions, an interleaved CGSB-based MLI is introduced in this work. The main benefits of the proposed topology are larger injected grid current handling capability with a reduced current stress, uniform peak voltage stress across the devices, bidirectional power flow operation, controllable power sharing, and generalization capability to realize any number of output voltage levels. Through a modular design with a phase-shifted PWM technique, the injected grid current is shared among the modules, while the size of the grid-interface filters is reduced, leading to establishing a practical design with enhanced overall efficiency. The working principle of the proposed converter is discussed in detail. Design guidance, comparative study and extensive closed-loop experimental results obtained from a 5.1 kW grid-tied laboratory-built prototype are then given to validate the feasibility and performance of the proposed solution.

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http://hdl.handle.net/10453/180252