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Synchronizing Torque-Based Transient Stability Index of a Multimachine Interconnected Power System

Author

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  • Albert Poulose

    (Department of Electrical Engineering, School of Electronic and Electrical Engineering, Kyungpook National University, Daegu 41566, Korea)

  • Soobae Kim

    (Department of Electrical Engineering, School of Electronic and Electrical Engineering, Kyungpook National University, Daegu 41566, Korea)

Abstract

Newly developed tools and techniques are continuously established to analyze and monitor power systems’ transient stability limits. In this paper, a model-based transient stability index for each generator is proposed from the synchronizing torque contributions of all other connected generators in a multi-machine interconnected power system. It is a new interpretation of the generator’s synchronizing torque coefficient (STC) in terms of electromechanical oscillation modes to consider the synchronizing torque interactions among generators. Thus, the system operator can continuously monitor the system’s available secured transient stability limit in terms of synchronizing torque more accurately, which is helpful for planning and operation studies due to the modal based index. Furthermore, the popular transient stability indicator critical clearing time (CCT), and the traditionally determined synchronizing torque values without other generator contributions, are calculated to verify and compare the performance of the proposed transient stability index. The simulations and test result discussions are performed over a western system coordinating council (WSCC) 9-bus and an extensive New England 68-bus large power test system cases. The open-source power system analysis toolbox (PSAT) on the MATLAB/Simulink environment is used to develop, simulate, validate and compare the proposed transient stability index.

Suggested Citation

  • Albert Poulose & Soobae Kim, 2022. "Synchronizing Torque-Based Transient Stability Index of a Multimachine Interconnected Power System," Energies, MDPI, vol. 15(9), pages 1-14, May.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:9:p:3432-:d:810789
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    References listed on IDEAS

    as
    1. Hassan Haes Alhelou & Mohamad Esmail Hamedani-Golshan & Takawira Cuthbert Njenda & Pierluigi Siano, 2019. "A Survey on Power System Blackout and Cascading Events: Research Motivations and Challenges," Energies, MDPI, vol. 12(4), pages 1-28, February.
    2. Nor Azwan Mohamed Kamari & Ismail Musirin & Ahmad Nazri Dagang & Mohd Hairi Mohd Zaman, 2020. "PSO-Based Oscillatory Stability Assessment by Using the Torque Coefficients for SMIB," Energies, MDPI, vol. 13(5), pages 1-15, March.
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    Cited by:

    1. Albert Poulose & Soobae Kim, 2023. "Transient Stability Analysis and Enhancement Techniques of Renewable-Rich Power Grids," Energies, MDPI, vol. 16(5), pages 1-30, March.

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