Van Cutsem, Thierry[Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Systèmes et modélisation >]
Power and Energy Society General Meeting
du 20 juillet 2008 au 24 juillet 2008
[en] Long-term voltage stability ; instability detection ; phasor measurement units ; sensitivity analysis ; wide-area monitoring
[en] This paper deals with long-term voltage instability triggered by the outage of transmission or generation equipments. It is shown how the onset of voltage instability could be detected in real-time from post-disturbance bus voltages provided by Phasor Measurement Units (PMUs), assuming observability of the whole region prone to voltage instability. An extended set of equilibrium equations is fitted to the measurements and the change in sign of sensitivities is onitored. The latter are easily computed even for a large system. The important effects of overexcitation limiters and load tap changers are taken into account. The approach is illustrated on a 52-bus 20-machine system, where PMU outputs are simulated from detailed time
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
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