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Energies 2018, 11(3), 569; https://doi.org/10.3390/en11030569

High-Efficiency Isolated Photovoltaic Microinverter Using Wide-Band Gap Switches for Standalone and Grid-Tied Applications

1
Department of Electrical Engineering, National Ilan University, No. 1, Section 1, Shennong Road, Yilan 260, Taiwan
2
Department of Electronic Engineering, National Taiwan University of Science and Technology, No. 43, Section 4, Keelung Road, Da’an District, Taipei 106, Taiwan
3
School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology, 50 UNIST-gil Ulju-gun, Ulsan 44919, Korea
*
Author to whom correspondence should be addressed.
Received: 6 February 2018 / Revised: 28 February 2018 / Accepted: 28 February 2018 / Published: 6 March 2018
(This article belongs to the Special Issue Power Electronics in DC-Microgrid Systems)
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Abstract

An isolated photovoltaic micro-inverter for standalone and grid-tied applications is designed and implemented to achieve high efficiency. System configuration and design considerations, including the proposed active-clamp forward-flyback resonant converter for the DC-DC stage and a dual-frequency full-bridge inverter for the DC-AC stage, are analyzed and discussed. A prototype microinverter system is built and tested. Experimental results verify the feasibility of the proposed system, which achieves 95% power conversion efficiency at full load. View Full-Text
Keywords: photovoltaic; microinverter; grid-tied inverter; wide-band gap switches; high switching frequency; high power density; photovoltaic applications; power electronics; solar energy photovoltaic; microinverter; grid-tied inverter; wide-band gap switches; high switching frequency; high power density; photovoltaic applications; power electronics; solar energy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Liu, Y.-C.; Chen, M.-C.; Yang, C.-Y.; Kim, K.A.; Chiu, H.-J. High-Efficiency Isolated Photovoltaic Microinverter Using Wide-Band Gap Switches for Standalone and Grid-Tied Applications. Energies 2018, 11, 569.

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