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Lookup NU author(s): Weichi Zhang, Yahya Naderi ZarnaghiORCiD, Chenming Zhang
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2020 The Authors. IET Power Electronics published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology. In this paper, a new switched capacitor-based multilevel inverter structure is suggested. The proposed topology can generate seven-level output voltage waveform using ten power electronic switches and two floating capacitors. This structure has the ability to boost the input DC voltage, up to 1.5 times. Although this topology can generate an output waveform with large number of levels, it does not increase the voltage stress on the power electronic switches. There is no need for capacitor voltage balancing in this structure since the capacitors are balanced through charging and discharging modes of operation. In addition, the suggested switched capacitor inverter reduces the number of input dc power supplies and uses a single dc source such as a photovoltaic (PV) panel. Since the proposed inverter is an neutral point clamp based multilevel inverter topology, the leakage current is minimized and as a result the overall efficiency of the proposed system is increased. The operation modes and steady-state analysis of the proposed structure are explained in detail. In order to validate the feasibility of the proposed topology, some experimental results are presented in the grid connected mode of operation.
Author(s): Gao Y, Zhang W, Naderi Zarnaghi Y, Vosoughi Kurdkandi N, Zhang C
Publication type: Article
Publication status: Published
Journal: IET Power Electronics
Year: 2021
Volume: 14
Issue: 2
Pages: 268-279
Print publication date: 01/02/2021
Online publication date: 31/12/2020
Acceptance date: 26/08/2020
Date deposited: 17/07/2021
ISSN (print): 1755-4535
ISSN (electronic): 1755-4543
Publisher: John Wiley and Sons Ltd
URL: https://doi.org/10.1049/pel2.12031
DOI: 10.1049/pel2.12031
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