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Silicium-Carbide-Based Isolated DC/DC Converter for Medium-Voltage Photovoltaic Power Plants

Author

Listed:
  • Minh Nhut Ngo

    (Laboratory of Intelligent Management of Electrical Network (LIRE), Department of Solar Technologies (DTS), LITEN, CEA Grenoble, 73370 Le Bourget du Lac, France
    Laboratory of Plasma and Energy Conversion (LAPLACE), University of Toulouse, 31000 Toulouse, France)

  • Philippe Ladoux

    (Laboratory of Plasma and Energy Conversion (LAPLACE), University of Toulouse, 31000 Toulouse, France)

  • Jérémy Martin

    (Laboratory of Intelligent Management of Electrical Network (LIRE), Department of Solar Technologies (DTS), LITEN, CEA Grenoble, 73370 Le Bourget du Lac, France)

  • Sébastien Sanchez

    (Laboratory of Plasma and Energy Conversion (LAPLACE), University of Toulouse, 31000 Toulouse, France
    ICAM, Toulouse Site, 31300 Toulouse, France)

Abstract

The production of large-scale photovoltaics (PVs) is becoming increasingly popular in the field of power generation; they require the construction of power plants of several hundred megawatts. Nevertheless, the construction of these PV power plants with conventional low-voltage (LV) conversion systems is not an appropriate technological path. Particularly, large cross-section cables, a high quantity of semiconductors, and the bulky layout of 50/60-Hz step-up transformers make the PV system less competitive in terms of energy efficiency and cost. To overcome these drawbacks, this paper introduces new PV plant topologies with an intermediate medium-voltage direct current (MVDC) collector that requires galvanic isolation for connecting the PV arrays. Then, the design of a power electronic transformer (PET) is proposed, implementing 1.7-kV and 3.3-kV silicium carbide (SiC) power modules. The study confirms that this converter allows the use of medium-frequency (MF) transformers with high power densities while maintaining high efficiency, which facilitates the implementation of isolated medium-voltage (MV) topologies for utility-scale PV power plants.

Suggested Citation

  • Minh Nhut Ngo & Philippe Ladoux & Jérémy Martin & Sébastien Sanchez, 2022. "Silicium-Carbide-Based Isolated DC/DC Converter for Medium-Voltage Photovoltaic Power Plants," Energies, MDPI, vol. 15(3), pages 1-17, January.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:3:p:1038-:d:738619
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    References listed on IDEAS

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    1. Elyas Rakhshani & Kumars Rouzbehi & Adolfo J. Sánchez & Ana Cabrera Tobar & Edris Pouresmaeil, 2019. "Integration of Large Scale PV-Based Generation into Power Systems: A Survey," Energies, MDPI, vol. 12(8), pages 1-19, April.
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