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Enhanced soft-switching strategy for flyback-based microinverter in PV power systems

Hasan, R, Hassan, W ORCID: 0000-0002-1926-1724, Farhangi, M, Mekhilef, S and Xiao, W 2019 , 'Enhanced soft-switching strategy for flyback-based microinverter in PV power systems' , IET Renewable Power Generation, vol. 13, no. 15 , pp. 2830-2839 , doi: 10.1049/iet-rpg.2019.0307.

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Flyback topology has been widely used to construct modular power conversion for solar photovoltaic (PV) grid-tied systems, which creates a parallel interconnection infrastructure and is considered as the most straightforward way to cope with the harmful mismatch effects among PV modules. The challenge becomes the conversion efficiency and system reliability to be competitive with traditional system configurations. This study proposes a comprehensive solution to overcome the present problem, which optimally integrates the technology of resonant circuit, adaptive modulation scheme, and active clamping to enhance soft-switching capability and system efficiency. The effectiveness of theoretical analysis, circuit design, and modulation scheme is analysed by simulation and verified by experimental evaluation. The California Energy Commission efficiency is tested and shown as 97.4%.

Item Type: Article
Authors/Creators:Hasan, R and Hassan, W and Farhangi, M and Mekhilef, S and Xiao, W
Keywords: microinverter, flyback converter, solar photovoltaic power system
Journal or Publication Title: IET Renewable Power Generation
Publisher: The Institution of Engineering and Technology
ISSN: 1752-1416
DOI / ID Number: 10.1049/iet-rpg.2019.0307
Copyright Information:

© The Institution of Engineering and Technology 2019

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