Glauco N. Taranto
Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
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Available from: coep.ufrj.br
Reliability analysis of voltage instability risk indicator based on a novel real‐time identification algorithm
, Glauco N. Taranto
This paper focuses the performance and robustness of an algorithm recently proposed in the literature for real-time voltage instability risk indication. Based on local phasor measurements, the real-time identification of the proximity of the equivalent Thevenin impedance seen from an EHV bus and its load impedance is the key to recognize the voltage instability risk at the time it is approaching. The paper highlights the impact of the dynamics of on-load tap changing transformers and generators over-excitation limiters on the Thevenin equivalent identification (and consequently on the timely voltage instability indication). The paper also shows the high reliability of the algorithm with respect to load characteristics and to critical load profiles corresponding to very large perturbations. The paper presents simulation results obtained from a detailed dynamic model of an equivalent single-generator system, as well as from the actual Italian EHV network. Copyright © 2010 John Wiley & Sons, Ltd.
European Transactions on Electrical Power 04/2011; 21(4):1610 - 1628.
· 0.63 Impact Factor
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European Transactions on Electrical Power
Federal University of Rio de Janeiro
Rio de Janeiro, Rio de Janeiro, Brazil
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