Article (Scientific journals)
Wide-area Detection of Voltage Instability from Synchronized Phasor Measurements. Part I: Principle
Glavic, Mevludin; Van Cutsem, Thierry
2009In IEEE Transactions on Power Systems, 24 (3), p. 1408 - 1416
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Keywords :
Long-term voltage stability; instability detection; wide-area monitoring; phasor measurement units; sensitivity analysis
Abstract :
[en] This two-part paper deals with the early detection of an impending voltage instability from the system states provided by synchronized phasor measurements. Recognizing that voltage instability detection requires assessing a multi-dimensional system, the method fits a set of algebraic equations to the sampled states, and performs an efficient sensitivity computation in order to identify when a combination of load powers has passed through a maximum. The important effects of overexcitation limiters are accounted for. The approach does not require any load model. This first part of the paper is devoted to theoretical foundations of sensitivity calculation along the system trajectory, derivation of the algebraic model, and illustration on a simple 5-bus system involving the long-term dynamics of a load tap changer and a field current limiter.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Glavic, Mevludin 
Van Cutsem, Thierry  ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Systèmes et modélisation
Language :
English
Title :
Wide-area Detection of Voltage Instability from Synchronized Phasor Measurements. Part I: Principle
Publication date :
August 2009
Journal title :
IEEE Transactions on Power Systems
ISSN :
0885-8950
Publisher :
IEEE, Piscataway, NJ, United States
Volume :
24
Issue :
3
Pages :
1408 - 1416
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 06 March 2009

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