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Enhancing Power System Frequency with a Novel Load Shedding Method Including Monitoring of Synchronous Condensers’ Power Injections

Author

Listed:
  • Antans Sauhats

    (Institute of Power Engineering, Riga Technical University, 12-k1 Azenes Street, LV-1010 Riga, Latvia)

  • Andrejs Utans

    (Institute of Power Engineering, Riga Technical University, 12-k1 Azenes Street, LV-1010 Riga, Latvia)

  • Jurijs Silinevics

    (Institute of Power Engineering, Riga Technical University, 12-k1 Azenes Street, LV-1010 Riga, Latvia
    AS Augstsprieguma Tikls (TSO), 86 Darzciema Iela, LV-1073 Riga, Latvia)

  • Gatis Junghans

    (AS Augstsprieguma Tikls (TSO), 86 Darzciema Iela, LV-1073 Riga, Latvia)

  • Dmitrijs Guzs

    (Institute of Power Engineering, Riga Technical University, 12-k1 Azenes Street, LV-1010 Riga, Latvia
    AS Augstsprieguma Tikls (TSO), 86 Darzciema Iela, LV-1073 Riga, Latvia)

Abstract

Under-frequency load shedding (UFLS) is a classic and a commonly accepted measure used to mitigate the frequency disturbances in case of loss-of-generation incidents in AC power grids. Triggering of UFLS is classically done at frequency thresholds when system frequency collapse is already close to happening. The renewed interest for synchronous condensers due to the global trends on massive commissioning of non-synchronous renewable power generation leading to reduction of system inertia gives an opportunity to rethink the approach used to trigger load-shedding activation. This question is especially relevant for the Baltic states facing a desynchronization from Russian power grid and a necessity to operate in an isolated island mode. The main goal of this paper is to introduce a predictive load shedding (LS) method without usage of either frequency or ROCOF measurements based on the monitoring of active power injections of synchronous condensers and to prove the efficiency of the concept through several sets of case study simulations. The paper shows that the proposed approach can provide a greatly improved frequency stability of the power system. The results are analyzed and discussed, the way forward for the practical implementation of the concept is sketched.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:5:p:1490-:d:513299
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    References listed on IDEAS

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    4. Talaat, M. & Hatata, A.Y. & Alsayyari, Abdulaziz S. & Alblawi, Adel, 2020. "A smart load management system based on the grasshopper optimization algorithm using the under-frequency load shedding approach," Energy, Elsevier, vol. 190(C).
    5. Alejandro Rubio & Holger Behrends & Stefan Geißendörfer & Karsten von Maydell & Carsten Agert, 2020. "Determination of the Required Power Response of Inverters to Provide Fast Frequency Support in Power Systems with Low Synchronous Inertia," Energies, MDPI, vol. 13(4), pages 1-21, February.
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    Cited by:

    1. Edgars Groza & Santa Kiene & Olegs Linkevics & Karlis Gicevskis, 2022. "Modelling of Battery Energy Storage System Providing FCR in Baltic Power System after Synchronization with the Continental Synchronous Area," Energies, MDPI, vol. 15(11), pages 1-18, May.
    2. Gian Paramo & Arturo Bretas, 2023. "Proactive Frequency Stability Scheme: A Distributed Framework Based on Particle Filters and Synchrophasors," Energies, MDPI, vol. 16(11), pages 1-19, June.

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