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Open AccessArticle

A Recap of Voltage Stability Indices in the Past Three Decades

1
Strategic Research Projects Center, University of the Ryukyus, 1 Senbaru, Okinawa 903-0213, Japan
2
Department of Electrical and Electronics Engineering, University of the Ryukyus, 1 Senbaru, Okinawa 903-0213, Japan
3
Department of Energy Engineering, Kabul University, Jamal Mina, Karti Sakhi, Kabul 1006, Afghanistan
4
Department of Electrical and Electronics Engineering, SASTRA Deemed University, Thanjavur, Tamil Nadu 613401, India
5
Department of Electrical and Computer Engineering, The University of Texas at El Paso, Texas, TX 79968, USA
*
Author to whom correspondence should be addressed.
Energies 2019, 12(8), 1544; https://doi.org/10.3390/en12081544
Received: 23 January 2019 / Revised: 3 April 2019 / Accepted: 17 April 2019 / Published: 24 April 2019
(This article belongs to the Special Issue Advanced Techniques for Electronic Power and Energy Systems)
Increasing demand for electricity and the modernization of power systems within competitive markets has induced power systems to operate close to their stability limits. Therefore, the continuous monitoring and control of power systems through voltage stability indices is urgently needed. This is the first-ever effort to examine more than 40 voltage stability indices based on their formulation, application, performance, and assessment measures. These indices are sorted based on a logical and chronological order considering the most recent indices to be applied worldwide. However, the generalizability of these indices in terms of multivariable objectives is limited. Despite its limitation, this study systematically reviews available indices in the literature within the past three decades to compile an integrated knowledge base with an up-to-date exposition. This is followed by a comparative analysis in terms of their similarity, functionality, applicability, formulation, merit, demerit, and overall performance. Also, a broad categorization of voltage stability indices is addressed. This study serves as an exhaustive roadmap of the issue and can be counted as a reference for planning and operation in the context of voltage stability for students, researchers, scholars, and practitioners. View Full-Text
Keywords: voltage stability; stability index; voltage stability indicator; power system stability; power system monitoring; voltage collapse; blackout; voltage stability classification voltage stability; stability index; voltage stability indicator; power system stability; power system monitoring; voltage collapse; blackout; voltage stability classification
MDPI and ACS Style

Danish, M.S.S.; Senjyu, T.; Danish, S.M.S.; Sabory, N.R.; K, N.; Mandal, P. A Recap of Voltage Stability Indices in the Past Three Decades. Energies 2019, 12, 1544.

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