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New Performance Indices for Voltage Stability Analysis in a Power System

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  • Isaiah Adebayo

    (Department of Electrical and Electronic Engineering Science, University of Johannesburg, Johannesburg 2006, South Africa
    Department of Electronic and Electrical Engineering, Ladoke Akintola University of Technology, P.M.B 4000, Ogbomoso 210271, Oyo State, Nigeria)

  • Yanxia Sun

    (Department of Electrical and Electronic Engineering Science, University of Johannesburg, Johannesburg 2006, South Africa)

Abstract

The frequent occurrence of voltage instability in a modern power system is alarming and thus, has been of great concern to power system utilities. In this paper, a new performance index based on the power flow solutions for voltage stability assessment of a power system is presented. First, the voltage deviation with respect to reactive power load variation at each load bus is found. Thereafter, the performance voltage bus index for each load bus is computed. An improved modal analysis technique (IMAT) is used to identify weak nodes that are liable to voltage instability in a power system. This technique uses a submatrix of the full Jacobian matrix for voltage stability analysis. Comparison of the proposed method is done with existing voltage stability indices and the conventional modal analysis technique (CMAT). The effectiveness of all the approaches presented are tested on both Western system coordinating Council (WSCC) 9-bus, IEEE 30 bus and IEEE 57 bus test systems. Results obtained show that the proposed techniques can serve as an alternative tool to other conventional techniques for voltage stability assessment in a power system and can be of tremendous benefits in the planning and operation of a power system by system operators.

Suggested Citation

  • Isaiah Adebayo & Yanxia Sun, 2017. "New Performance Indices for Voltage Stability Analysis in a Power System," Energies, MDPI, vol. 10(12), pages 1-18, December.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:12:p:2042-:d:121402
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    References listed on IDEAS

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    1. Van Duong Ngo & Dinh Duong Le & Kim Hung Le & Van Kien Pham & Alberto Berizzi, 2017. "A Methodology for Determining Permissible Operating Region of Power Systems According to Conditions of Static Stability Limit," Energies, MDPI, vol. 10(8), pages 1-15, August.
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    Cited by:

    1. Oscar Danilo Montoya & Walter Gil-González & Andrés Arias-Londoño & Arul Rajagopalan & Jesus C. Hernández, 2020. "Voltage Stability Analysis in Medium-Voltage Distribution Networks Using a Second-Order Cone Approximation," Energies, MDPI, vol. 13(21), pages 1-15, November.
    2. Yunqi Xiao & Yi Wang & Yanping Sun, 2018. "Reactive Power Optimal Control of a Wind Farm for Minimizing Collector System Losses," Energies, MDPI, vol. 11(11), pages 1-15, November.
    3. Abdullahi Oboh Muhammed & Muhyaddin Rawa, 2020. "A Systematic PVQV-Curves Approach for Investigating the Impact of Solar Photovoltaic-Generator in Power System Using PowerWorld Simulator," Energies, MDPI, vol. 13(10), pages 1-21, May.

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