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Frequency Dynamics in Fully Non-Synchronous Electrical Grids: A Case Study of an Existing Island

Author

Listed:
  • Mariano G. Ippolito

    (Engineering Department, University of Palermo, 90128 Palermo, Italy)

  • Rossano Musca

    (Engineering Department, University of Palermo, 90128 Palermo, Italy)

  • Eleonora Riva Sanseverino

    (Engineering Department, University of Palermo, 90128 Palermo, Italy)

  • Gaetano Zizzo

    (Engineering Department, University of Palermo, 90128 Palermo, Italy)

Abstract

The operation of a power system with 100% converter-interfaced generation poses several questions and challenges regarding various aspects of the design and the control of the system. Existing literature on the integration of renewable energy sources in isolated systems mainly focuses on energy aspects or steady-state issues, and only a few studies examine the dynamic issues of autonomous networks operated with fully non-synchronous generation. A lack of research can be found in particular in the determination of the required amount of grid-forming power, the selection of the number and rated power of the units which should implement the grid-forming controls, and the relative locations of the grid-forming converters. The paper aims to address those research gaps starting from a theoretical point of view and then by examining the actual electrical network of an existing island as a case study. The results obtained from the investigations indicate specific observations and design opportunities, which are essential for securing the synchronization and the stability of the grid. Possible solutions for a fully non-synchronous operation of autonomous systems, in terms of dynamic characteristics and frequency stability, are presented and discussed.

Suggested Citation

  • Mariano G. Ippolito & Rossano Musca & Eleonora Riva Sanseverino & Gaetano Zizzo, 2022. "Frequency Dynamics in Fully Non-Synchronous Electrical Grids: A Case Study of an Existing Island," Energies, MDPI, vol. 15(6), pages 1-24, March.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:6:p:2220-:d:774067
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    References listed on IDEAS

    as
    1. Bingtuan Gao & Chaopeng Xia & Ning Chen & Khalid Mehmood Cheema & Libin Yang & Chunlai Li, 2017. "Virtual Synchronous Generator Based Auxiliary Damping Control Design for the Power System with Renewable Generation," Energies, MDPI, vol. 10(8), pages 1-21, August.
    2. Chang Yuan & Peilin Xie & Dan Yang & Xiangning Xiao, 2018. "Transient Stability Analysis of Islanded AC Microgrids with a Significant Share of Virtual Synchronous Generators," Energies, MDPI, vol. 11(1), pages 1-19, January.
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    Cited by:

    1. Musca, Rossano & Vasile, Antony & Zizzo, Gaetano, 2022. "Grid-forming converters. A critical review of pilot projects and demonstrators," Renewable and Sustainable Energy Reviews, Elsevier, vol. 165(C).
    2. Rossano Musca & Francisco Gonzalez-Longatt & Cesar A. Gallego Sánchez, 2022. "Power System Oscillations with Different Prevalence of Grid-Following and Grid-Forming Converters," Energies, MDPI, vol. 15(12), pages 1-19, June.

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