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A New Approach for Long-Term Stability Estimation Based on Voltage Profile Assessment for a Power Grid

Author

Listed:
  • Alireza Pourdaryaei

    (Substations and Relays Repairs and Maintenance Affairs, Operation and Protection Office, Hormozgan Regional Electric Company, Bandar Abbas 7916795599, Iran)

  • Amidaddin Shahriari

    (Department of Electrical Engineering, Islamic Azad University, South Tehran Branch, Tehran 1477893855, Iran)

  • Mohammad Mohammadi

    (Department of Power and Control, School of Electrical and Computer Engineering, Shiraz University, Shiraz 7194684334, Iran)

  • Mohammad Reza Aghamohammadi

    (Department of Electrical Engineering, Shahid Abbaspour School of Engineering, Shahid Beheshti University, Tehran 1983969411, Iran)

  • Mazaher Karimi

    (School of Technology and Innovations, University of Vaasa, Wolffintie 34, 65200 Vaasa, Finland)

  • Kimmo Kauhaniemi

    (School of Technology and Innovations, University of Vaasa, Wolffintie 34, 65200 Vaasa, Finland)

Abstract

Load flow solutions refer to the steady-state stability of power systems and have a crucial role in the design and planning of slow-changing elements; e.g., in online tab changing actions, automatic generation control, over-excitation limiters and the power recovery characteristics of a load. Therefore, the purpose of this work was to show the connectivity between load flow analysis and long-term voltage stability using a generator model by introducing a novel voltage stability assessment based on the multi-machine dynamic model along with the load flow study for a power grid. The Euclidean distance (ED) was used to introduce a new voltage stability index based on the voltage phasor profile for real-time monitoring purposes. The effects of reactive power compensation, in addition to load-generation patterns and network topology changes in the system behavior, could be seen clearly on the voltage profiles of the buses. Thus, the increased values for the EDs of the buses’ voltage amplitudes—from 0 to around 1.5 (p.u.)—implied that the system was approaching the voltage collapse point, corresponding to the Jacobian matrix singularity of the load flow equation. Moreover, the weakest load bus with respect to any system change was also identified. Indeed, the criticality of any network interruption was in direct proportion to this voltage stability index. The proposed method was validated using the IEEE 118-bus test system.

Suggested Citation

  • Alireza Pourdaryaei & Amidaddin Shahriari & Mohammad Mohammadi & Mohammad Reza Aghamohammadi & Mazaher Karimi & Kimmo Kauhaniemi, 2023. "A New Approach for Long-Term Stability Estimation Based on Voltage Profile Assessment for a Power Grid," Energies, MDPI, vol. 16(5), pages 1-21, March.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:5:p:2508-:d:1089493
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    References listed on IDEAS

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    1. Rambabu Muppidi & Ramakrishna S. S. Nuvvula & S. M. Muyeen & SK. A. Shezan & Md. Fatin Ishraque, 2022. "Optimization of a Fuel Cost and Enrichment of Line Loadability for a Transmission System by Using Rapid Voltage Stability Index and Grey Wolf Algorithm Technique," Sustainability, MDPI, vol. 14(7), pages 1-19, April.
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    Cited by:

    1. Yangyang Li & Dongfeng Yang & Chuang Liu & Dongbo Guo & Yichen Gu & Jiahe Li, 2024. "Dynamic Reactive Power Allocation Method of Power Grid with High-Permeability PV Considering Transient Voltage Stability," Energies, MDPI, vol. 17(5), pages 1-27, March.

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