A Common-Ground-Type Five-Level Inverter with Dynamic Voltage Boost

Kakar, S; Ayob, SM; Lee, SS; Arif, MSB; Nordin, NM; Barzegarkhoo, R; Siwakoti, YP

A Common-Ground-Type Five-Level Inverter with Dynamic Voltage Boost

Kakar, S Ayob, SM Lee, SS Arif, MSB Nordin, NM Barzegarkhoo, R Siwakoti, YP

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Publisher:: MDPI
Publication Type:: Journal Article
Citation:: Electronics (Switzerland), 2022, 11, (24), pp. 4174
Issue Date:: 2022-12-01

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Field	Value	Language
dc.contributor.author	Kakar, S
dc.contributor.author	Ayob, SM
dc.contributor.author	Lee, SS
dc.contributor.author	Arif, MSB
dc.contributor.author	Nordin, NM
dc.contributor.author	Barzegarkhoo, R
dc.contributor.author	Siwakoti, YP
dc.date.accessioned	2023-03-02T04:53:11Z
dc.date.available	2023-03-02T04:53:11Z
dc.date.issued	2022-12-01
dc.identifier.citation	Electronics (Switzerland), 2022, 11, (24), pp. 4174
dc.identifier.issn	1450-5843
dc.identifier.issn	2079-9292
dc.identifier.uri	http://hdl.handle.net/10453/166636
dc.description.abstract	Today, transformerless inverters (TIs) are widely applicable in different solar photovoltaic (PV) grid-connected applications owing to their promising features, such as higher efficiency and power density. However, high-frequency common-mode voltage (CMV) in these topologies can result in high leakage current, electromagnetic interference, and lack of safety, reducing the whole system’s reliability. To resolve the problems associated with TIs, this paper proposes a novel hybrid switched capacitor (SC)-based common-ground (CG) transformerless inverter (TI) topology, which can be applied in grid-connected photovoltaic (PV) applications. The boost inductor is integrated to achieve continuous input current and dynamic voltage gain. In addition, the proposed circuit comprises nine switches and two SCs with a single input DC source. It can generate five-level AC voltage with voltage boosting within a single-stage DC–AC power conversion. The working principles of the proposed topology, circuit description, and control technique are presented. Furthermore, the proposed inverter is comprehensively compared with other five-level TIs to show its superiority. Finally, a laboratory prototype is developed and tested to validate the practical viability of the proposed configuration.
dc.language	en
dc.publisher	MDPI
dc.relation.ispartof	Electronics (Switzerland)
dc.relation.isbasedon	10.3390/electronics11244174
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0906 Electrical and Electronic Engineering
dc.title	A Common-Ground-Type Five-Level Inverter with Dynamic Voltage Boost
dc.type	Journal Article
utslib.citation.volume	11
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	open_access	*
dc.date.updated	2023-03-02T04:53:10Z
pubs.issue	24
pubs.publication-status	Published
pubs.volume	11
utslib.citation.issue	24

Abstract:

Today, transformerless inverters (TIs) are widely applicable in different solar photovoltaic (PV) grid-connected applications owing to their promising features, such as higher efficiency and power density. However, high-frequency common-mode voltage (CMV) in these topologies can result in high leakage current, electromagnetic interference, and lack of safety, reducing the whole system’s reliability. To resolve the problems associated with TIs, this paper proposes a novel hybrid switched capacitor (SC)-based common-ground (CG) transformerless inverter (TI) topology, which can be applied in grid-connected photovoltaic (PV) applications. The boost inductor is integrated to achieve continuous input current and dynamic voltage gain. In addition, the proposed circuit comprises nine switches and two SCs with a single input DC source. It can generate five-level AC voltage with voltage boosting within a single-stage DC–AC power conversion. The working principles of the proposed topology, circuit description, and control technique are presented. Furthermore, the proposed inverter is comprehensively compared with other five-level TIs to show its superiority. Finally, a laboratory prototype is developed and tested to validate the practical viability of the proposed configuration.

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http://hdl.handle.net/10453/166636