A five-level common-ground inverter with step-up/step-down dual-mode operation for transformerless grid-connected PV application

Grigoletto, FB; Cedieu, S; Chaves, DB; Sing Lee, S; Siwakoti, YP

A five-level common-ground inverter with step-up/step-down dual-mode operation for transformerless grid-connected PV application

Grigoletto, FB Cedieu, S Chaves, DB Sing Lee, S Siwakoti, YP

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Publisher:: Wiley
Publication Type:: Journal Article
Citation:: International Journal of Circuit Theory and Applications, 2024, 52, (3), pp. 1210-1230
Issue Date:: 2024-01-01

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Field	Value	Language
dc.contributor.author	Grigoletto, FB
dc.contributor.author	Cedieu, S
dc.contributor.author	Chaves, DB
dc.contributor.author	Sing Lee, S
dc.contributor.author	Siwakoti, YP
dc.date.accessioned	2024-10-10T01:26:30Z
dc.date.available	2024-10-10T01:26:30Z
dc.date.issued	2024-01-01
dc.identifier.citation	International Journal of Circuit Theory and Applications, 2024, 52, (3), pp. 1210-1230
dc.identifier.issn	0098-9886
dc.identifier.issn	1097-007X
dc.identifier.uri	http://hdl.handle.net/10453/181365
dc.description.abstract	Step-up multilevel inverters with common-ground feature are attractive for transformerless photovoltaic systems. However, their performance deteriorates at step-down voltage range. Considering a five-level inverter with double voltage gain, the number of output voltage levels decreases from 5 to 3 for a modulation index smaller than 0.5, declining the quality of the output currents. This paper proposes a new dual-mode five-level common-grounded inverter with a reduced number of switches. The proposed topology has the ability to operate as step-up or step-down making it well suited for application with wide input voltage range. The proposed inverter consists of five unidirectional switches, one bidirectional switch, two diodes, and two capacitors. In addition, the description of the topology, the design guidelines, and a comparison among the main topologies are given in detail. Experimental results are obtained to attest the practicability of the proposed solution.
dc.language	English
dc.publisher	Wiley
dc.relation.ispartof	International Journal of Circuit Theory and Applications
dc.relation.isbasedon	10.1002/cta.3785
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0906 Electrical and Electronic Engineering
dc.subject.classification	Electrical & Electronic Engineering
dc.subject.classification	4009 Electronics, sensors and digital hardware
dc.title	A five-level common-ground inverter with step-up/step-down dual-mode operation for transformerless grid-connected PV application
dc.type	Journal Article
utslib.citation.volume	52
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	*
pubs.consider-herdc	false
dc.date.updated	2024-10-10T01:26:28Z
pubs.issue	3
pubs.publication-status	Published
pubs.volume	52
utslib.citation.issue	3

Abstract:

Step-up multilevel inverters with common-ground feature are attractive for transformerless photovoltaic systems. However, their performance deteriorates at step-down voltage range. Considering a five-level inverter with double voltage gain, the number of output voltage levels decreases from 5 to 3 for a modulation index smaller than 0.5, declining the quality of the output currents. This paper proposes a new dual-mode five-level common-grounded inverter with a reduced number of switches. The proposed topology has the ability to operate as step-up or step-down making it well suited for application with wide input voltage range. The proposed inverter consists of five unidirectional switches, one bidirectional switch, two diodes, and two capacitors. In addition, the description of the topology, the design guidelines, and a comparison among the main topologies are given in detail. Experimental results are obtained to attest the practicability of the proposed solution.

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http://hdl.handle.net/10453/181365