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

Author

Listed:
  • Ahmed Y. Farag

    (Department of Management and Engineering (DTG), University of Padova, 36100 Vicenza, Italy)

  • Tarek Younis

    (Department of Electrical Engineering, Aswan University, Aswan 81528, Egypt)

  • Davide Biadene

    (Department of Management and Engineering (DTG), University of Padova, 36100 Vicenza, Italy)

  • Paolo Mattavelli

    (Department of Management and Engineering (DTG), University of Padova, 36100 Vicenza, Italy)

Abstract

This paper discusses bidirectional step-down topologies that enable the interface of the 400 V 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 10 k W 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 10 k W 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.

Suggested Citation

  • Ahmed Y. Farag & Tarek Younis & Davide Biadene & Paolo Mattavelli, 2023. "AC Grid–DC Microgrid Coupling with High-Performance Three-Phase Single-Stage Bidirectional Converters," Energies, MDPI, vol. 16(17), pages 1-16, August.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:17:p:6106-:d:1222287
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    References listed on IDEAS

    as
    1. Sadaqat Ali & Zhixue Zheng & Michel Aillerie & Jean-Paul Sawicki & Marie-Cécile Péra & Daniel Hissel, 2021. "A Review of DC Microgrid Energy Management Systems Dedicated to Residential Applications," Energies, MDPI, vol. 14(14), pages 1-26, July.
    2. Venkata Anand Prabhala & Bhanu Prashant Baddipadiga & Poria Fajri & Mehdi Ferdowsi, 2018. "An Overview of Direct Current Distribution System Architectures & Benefits," Energies, MDPI, vol. 11(9), pages 1-20, September.
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