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

Yu-Chen Liu, Ming-Cheng Chen, Chun-Yu Yang, Katherine A. Kim and Huang-Jen Chiu
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Yu-Chen Liu: Department of Electrical Engineering, National Ilan University, No. 1, Section 1, Shennong Road, Yilan 260, Taiwan
Ming-Cheng Chen: Department of Electronic Engineering, National Taiwan University of Science and Technology, No. 43, Section 4, Keelung Road, Da’an District, Taipei 106, Taiwan
Chun-Yu Yang: Department of Electronic Engineering, National Taiwan University of Science and Technology, No. 43, Section 4, Keelung Road, Da’an District, Taipei 106, Taiwan
Katherine A. Kim: School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology, 50 UNIST-gil Ulju-gun, Ulsan 44919, Korea
Huang-Jen Chiu: Department of Electronic Engineering, National Taiwan University of Science and Technology, No. 43, Section 4, Keelung Road, Da’an District, Taipei 106, Taiwan

Energies, 2018, vol. 11, issue 3, 1-15

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.

Keywords: photovoltaic; microinverter; grid-tied inverter; wide-band gap switches; high switching frequency; high power density; photovoltaic applications; power electronics; solar energy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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