Gunsal, I., Stone, D. and Foster, M. orcid.org/0000-0002-8565-0541 (2021) Suppressing leakage current for cascaded H-bridge inverters in renewable energy and storage systems. IEEE Transactions on Industrial Electronics, 68 (11). pp. 11035-11043. ISSN 0278-0046
Abstract
Leakage current in a transformerless cascaded H-bridge inverter is a problem that deteriorates the system performance and causes safety concerns. In this paper, a common-mode equivalent circuit is established for analyzing the occurrence of leakage current in an m-level cascaded H-bridge inverter with either asymmetrical or symmetrical inductance output filter configurations. The analysis provides a comparison between traditional phase shifted pulse width modulation, phase disposition pulse width modulation and the proposed leakage current reduction pulse width modulation. It is reported that grid leakage current cannot be suppressed in an asymmetrical inductance filter configuration solely based on modulation methods. The proposed LCRPWM pulse width modulation can effectively reduce the grid leakage current in a symmetrical filter configuration nine-level cascaded H-bridge inverter. Simulation and experimental studies for aforementioned methods are provided and their performances are evaluated.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | Cascaded H-bridge (CHB) inverter; leakage current; pulse width modulation; transformerless |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 23 Oct 2020 09:14 |
Last Modified: | 09 Feb 2022 11:56 |
Status: | Published |
Publisher: | Institute of Electrical and Electronics Engineers (IEEE) |
Refereed: | Yes |
Identification Number: | 10.1109/tie.2020.3031524 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:167106 |