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Decentralized Plug-and-Play Protection Scheme for Low Voltage DC Grids

Author

Listed:
  • Nils H. van der Blij

    (Department of Electrical Sustainable Energy, Delft University of Technology, Mekelweg 4, 2628 CD Delft, The Netherlands)

  • Pavel Purgat

    (Department of Electrical Sustainable Energy, Delft University of Technology, Mekelweg 4, 2628 CD Delft, The Netherlands)

  • Thiago B. Soeiro

    (Department of Electrical Sustainable Energy, Delft University of Technology, Mekelweg 4, 2628 CD Delft, The Netherlands)

  • Laura M. Ramirez-Elizondo

    (Department of Electrical Sustainable Energy, Delft University of Technology, Mekelweg 4, 2628 CD Delft, The Netherlands)

  • Matthijs T. J. Spaan

    (Department of Software Technology, Delft University of Technology, Van Mourik Broekmanweg 6, 2628 XE Delft, The Netherlands)

  • Pavol Bauer

    (Department of Electrical Sustainable Energy, Delft University of Technology, Mekelweg 4, 2628 CD Delft, The Netherlands)

Abstract

Since the voltages and currents in dc grids do not have a natural zero-crossing, the protection of these grids is more challenging than the protection of conventional ac grids. Literature presents several unit and non-unit protection schemes that rely on communication, or knowledge about the system’s topology and parameters in order to achieve selective protection in these grids. However, communication complicates fast fault detection and interruption, and a system’s parameters are subject to uncertainty and change. This paper demonstrates that, in low voltage dc grids, faults propagate fast through the grid and interrupted inductive currents commutate to non-faulted sections of the grid, which both can cause circuit breakers in non-faulted sections to trip. A decentralized plug-and-play protection scheme is proposed that ensures selectivity via an augmented solid-state circuit breaker topology and by utilizing the proposed time-current characteristic. It is experimentally shown that the proposed scheme provides secure and selective fault interruption for radial and meshed low voltage dc grids under various conditions.

Suggested Citation

  • Nils H. van der Blij & Pavel Purgat & Thiago B. Soeiro & Laura M. Ramirez-Elizondo & Matthijs T. J. Spaan & Pavol Bauer, 2020. "Decentralized Plug-and-Play Protection Scheme for Low Voltage DC Grids," Energies, MDPI, vol. 13(12), pages 1-20, June.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:12:p:3167-:d:373332
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    References listed on IDEAS

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    1. Brearley, Belwin J. & Prabu, R. Raja, 2017. "A review on issues and approaches for microgrid protection," Renewable and Sustainable Energy Reviews, Elsevier, vol. 67(C), pages 988-997.
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    Cited by:

    1. Adam Dyśko & Dimitrios Tzelepis, 2022. "Protection of Future Electricity Systems," Energies, MDPI, vol. 15(3), pages 1-2, January.

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