Performance Evaluation of a New Transformerless Grid-Connected Six-Level Inverter with Integrated Voltage Boosting

Chandan, B; Pal, PK; Jana, KC; Siwakoti, YP

Performance Evaluation of a New Transformerless Grid-Connected Six-Level Inverter with Integrated Voltage Boosting

Chandan, B Pal, PK Jana, KC Siwakoti, YP

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Publisher:: Institute of Electrical and Electronics Engineers (IEEE)
Publication Type:: Journal Article
Citation:: IEEE Journal of Emerging and Selected Topics in Power Electronics, 2024, pp. 1-1
Issue Date:: 2024-01-01

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Field	Value	Language
dc.contributor.author	Chandan, B
dc.contributor.author	Pal, PK
dc.contributor.author	Jana, KC
dc.contributor.author	Siwakoti, YP
dc.date.accessioned	2024-09-05T09:34:45Z
dc.date.available	2024-09-05T09:34:45Z
dc.date.issued	2024-01-01
dc.identifier.citation	IEEE Journal of Emerging and Selected Topics in Power Electronics, 2024, pp. 1-1
dc.identifier.issn	2168-6777
dc.identifier.issn	2168-6785
dc.identifier.uri	http://hdl.handle.net/10453/180653
dc.description.abstract	This paper presents a new six-level switched-capacitor multilevel inverter, which can generate six output voltage levels with 2.5 times voltage gain from a single dc source. The design is motivated by the need for an overall compact and efficient inverter with a smaller line filter without an additional boost converter and line transformer. The capacitor voltages remain balanced as the constant dc input voltage source directly charges them. The suppression of inrush capacitor charging current using charging inductors and voltage boosting capability make this inverter a significant contender for a transformerless grid-connected photovoltaic system. The closed-loop <italic>dq</italic> current control and dc-link voltage control have been discussed theoretically to control the active power fed to the grid and voltage across the dc-link capacitors. The hardware implementation demonstrates lower harmonics and reactive power handling capability. The simulation and experimental results are analyzed and presented for the grid-connected mode of operation. The maximum measured efficiency is 95.79% at 448.8 W of output power. The ability of multiphase expansion from a single dc source and 2.5 times voltage gain makes the proposed MLI suitable for interfacing distributed energy generation systems with the electrical grid.
dc.language	en
dc.publisher	Institute of Electrical and Electronics Engineers (IEEE)
dc.relation.ispartof	IEEE Journal of Emerging and Selected Topics in Power Electronics
dc.relation.isbasedon	10.1109/JESTPE.2024.3427766
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0906 Electrical and Electronic Engineering
dc.subject.classification	4008 Electrical engineering
dc.subject.classification	4009 Electronics, sensors and digital hardware
dc.title	Performance Evaluation of a New Transformerless Grid-Connected Six-Level Inverter with Integrated Voltage Boosting
dc.type	Journal Article
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	2024-09-05T09:34:40Z
pubs.publication-status	Published

Abstract:

This paper presents a new six-level switched-capacitor multilevel inverter, which can generate six output voltage levels with 2.5 times voltage gain from a single dc source. The design is motivated by the need for an overall compact and efficient inverter with a smaller line filter without an additional boost converter and line transformer. The capacitor voltages remain balanced as the constant dc input voltage source directly charges them. The suppression of inrush capacitor charging current using charging inductors and voltage boosting capability make this inverter a significant contender for a transformerless grid-connected photovoltaic system. The closed-loop dq current control and dc-link voltage control have been discussed theoretically to control the active power fed to the grid and voltage across the dc-link capacitors. The hardware implementation demonstrates lower harmonics and reactive power handling capability. The simulation and experimental results are analyzed and presented for the grid-connected mode of operation. The maximum measured efficiency is 95.79% at 448.8 W of output power. The ability of multiphase expansion from a single dc source and 2.5 times voltage gain makes the proposed MLI suitable for interfacing distributed energy generation systems with the electrical grid.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/180653