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Volume 16
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Article

AC Grid–DC Microgrid Coupling with High-Performance Three-Phase Single-Stage Bidirectional Converters †

by
Ahmed Y. Farag
1,
Tarek Younis
2,
Davide Biadene
1 and
Paolo Mattavelli
1,*
1
Department of Management and Engineering (DTG), University of Padova, 36100 Vicenza, Italy
2
Department of Electrical Engineering, Aswan University, Aswan 81528, Egypt
*
Author to whom correspondence should be addressed.
†
This paper is an extended version of our conference paper published in IECON 2022—48th Annual Conference of the IEEE Industrial Electronics Society Brussels, Belgium, 17–20 October 2022, pp. 1–6.
Energies 2023, 16(17), 6106; https://doi.org/10.3390/en16176106
Submission received: 26 July 2023 / Revised: 13 August 2023 / Accepted: 19 August 2023 / Published: 22 August 2023
(This article belongs to the Section A1: Smart Grids and Microgrids)
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Abstract

This paper discusses bidirectional step-down topologies that enable the interface of the 400V unipolar DC microgrid with the European low-voltage three-phase AC grid. The study compares three single-stage non-isolated topologies, namely, the seven-switch buck converter, Swiss converter, and Y-converter, based on semiconductor stresses and losses, magnetic component sizes and losses, and heat sink sizes. The analysis is conducted for a 10kW converter designed for small commercial or residential use. The results indicate that the Y-converter has superior overall performance compared to the other topologies, making it a potentially better candidate for this application. A 10kW prototype of the Y-converter is constructed. It is demonstrated to have a peak efficiency of 99.26% and an efficiency of 97.47% at the rated output power.
Keywords: DC microgrid; three-phase PFC rectifiers; seven-switch rectifier; Swiss rectifier; Y-converter DC microgrid; three-phase PFC rectifiers; seven-switch rectifier; Swiss rectifier; Y-converter

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MDPI and ACS Style

Farag, A.Y.; Younis, T.; Biadene, D.; Mattavelli, P. AC Grid–DC Microgrid Coupling with High-Performance Three-Phase Single-Stage Bidirectional Converters. Energies 2023, 16, 6106. https://doi.org/10.3390/en16176106

AMA Style

Farag AY, Younis T, Biadene D, Mattavelli P. AC Grid–DC Microgrid Coupling with High-Performance Three-Phase Single-Stage Bidirectional Converters. Energies. 2023; 16(17):6106. https://doi.org/10.3390/en16176106

Chicago/Turabian Style

Farag, Ahmed Y., Tarek Younis, Davide Biadene, and Paolo Mattavelli. 2023. "AC Grid–DC Microgrid Coupling with High-Performance Three-Phase Single-Stage Bidirectional Converters" Energies 16, no. 17: 6106. https://doi.org/10.3390/en16176106

APA Style

Farag, A. Y., Younis, T., Biadene, D., & Mattavelli, P. (2023). AC Grid–DC Microgrid Coupling with High-Performance Three-Phase Single-Stage Bidirectional Converters. Energies, 16(17), 6106. https://doi.org/10.3390/en16176106

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