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Enhancing resilience of low-inertia power systems through a novel load shedding method with synchronous condenser power control

Author

Listed:
  • Antans Sauhats

    (Riga Technical University, Faculty of Computer Science, Information Technology and Energy)

  • Diana Zalostiba

    (Riga Technical University, Faculty of Computer Science, Information Technology and Energy)

  • Andrejs Utans

    (Riga Technical University, Faculty of Computer Science, Information Technology and Energy)

  • Romans Petricenko

    (Riga Technical University, Faculty of Computer Science, Information Technology and Energy)

Abstract

This study explores the challenges posed by the transition to large-scale deployment of renewable energy sources, which lead to a significant reduction in the inertia of power systems. It focuses on enhancing resilience and frequency stability in response to sudden disturbances, such as generator failures or transmission line disconnections. The paper critically evaluates the limitations of conventional under-frequency load shedding (UFLS) methods and advances a novel Rapid Load Shedding (RLS) approach. The RLS method harnesses the active power response of synchronous condensers (SCs) to enable faster load shedding, thereby improving system stability and addressing operational constraints from a reliability perspective. The study demonstrates the feasibility of implementing new control systems using the proposed structure of a special protection scheme. It also examines the economic benefits of enhancing the allowable transfer capacity in the Baltic Power System (BPS) through this method. The findings highlight how the RLS approach can enable higher transfer capacities whilst maintaining system resilience. Additionally, the results indicate that the RLS method can significantly mitigate frequency deviations and enhance system stability, offering a promising solution for low-inertia power systems with high levels of renewable energy integration.

Suggested Citation

  • Antans Sauhats & Diana Zalostiba & Andrejs Utans & Romans Petricenko, 2025. "Enhancing resilience of low-inertia power systems through a novel load shedding method with synchronous condenser power control," Environment Systems and Decisions, Springer, vol. 45(3), pages 1-13, September.
    • Handle: RePEc:spr:envsyd:v:45:y:2025:i:3:d:10.1007_s10669-025-10040-3
    DOI: 10.1007/s10669-025-10040-3
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    References listed on IDEAS

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    1. Antans Sauhats & Andrejs Utāns & Diāna Žalostība, 2024. "Leveraging Pumped Storage Power Plants for Innovative Stability Enhancement of Weakly Interconnected Power Systems," Energies, MDPI, vol. 17(15), pages 1-25, July.
    2. Johnson, Samuel C. & Rhodes, Joshua D. & Webber, Michael E., 2020. "Understanding the impact of non-synchronous wind and solar generation on grid stability and identifying mitigation pathways," Applied Energy, Elsevier, vol. 262(C).
    3. Antans Sauhats & Andrejs Utans & Jurijs Silinevics & Gatis Junghans & Dmitrijs Guzs, 2021. "Enhancing Power System Frequency with a Novel Load Shedding Method Including Monitoring of Synchronous Condensers’ Power Injections," Energies, MDPI, vol. 14(5), pages 1-21, March.
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