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Control and Stability of Grid-Forming Inverters: A Comprehensive Review

Author

Listed:
  • Marzie Mirmohammad

    (Electrical and Computer Engineering/Faculty of Engineering, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, Canada)

  • Sahar Pirooz Azad

    (Electrical and Computer Engineering/Faculty of Engineering, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, Canada)

Abstract

The large integration of inverter-based resources will significantly alter grid dynamics, leading to pronounced stability challenges due to fundamental disparities between inverter-based and traditional energy systems. While grid-following inverters (GFLIs) dominate current inverter configurations, their increased penetration into the grid can result in major stability issues. In contrast, grid-forming inverters (GFMIs) excel over GFLIs by offering features like standalone operation, frequency support, and adaptability in weak grid scenarios. GFMIs, unlike GFLIs, control the AC voltage and frequency at the common coupling point, impacting the inverter dynamic response to grid disturbances and overall stability. Despite the existing literature highlighting differences between GFLIs and GFMIs and their control strategies, a comprehensive review of GFMIs’ stability and the effects of their control schemes on grid stability is lacking. This paper provides an in-depth evaluation of GFMIs’ stability, considering various control schemes and their dynamics. It also explores different types of power system stability, introduces new stability concepts that correspond to power grids with integrated inverters, i.e., resonance and converter-driven stability, and reviews small-signal and transient stability analyses, which are the main two types of GFMI stability studied in the literature. The paper further assesses existing studies on GFMI stability, pinpointing research gaps for future investigations.

Suggested Citation

  • Marzie Mirmohammad & Sahar Pirooz Azad, 2024. "Control and Stability of Grid-Forming Inverters: A Comprehensive Review," Energies, MDPI, vol. 17(13), pages 1-35, June.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:13:p:3186-:d:1424731
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    References listed on IDEAS

    as
    1. Tielens, Pieter & Van Hertem, Dirk, 2016. "The relevance of inertia in power systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 55(C), pages 999-1009.
    2. Shair, Jan & Xie, Xiaorong & Wang, Luping & Liu, Wei & He, Jingbo & Liu, Hui, 2019. "Overview of emerging subsynchronous oscillations in practical wind power systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 99(C), pages 159-168.
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