Time-scale decomposition in voltage stability analysis of power systems

C. D. Vournas, P. W. Sauer, M. A. Pai

Research output: Contribution to journalConference articlepeer-review


In this paper singular perturbation analysis is applied to a number of power system problems related to voltage stability: First, the generator dynamics in a multimachine power system are accurately decomposed into voltage and frequency (electromechanical) dynamics. Then, the quasi steady state representation of generators for the simulation of slow voltage transients is explained and justified. Finally, the singularity of algebraic constraints leading to what is called 'loss of causality' is found to be equivalent to the instability of faster, unmodeled dynamics of network and loads.

Original languageEnglish (US)
Pages (from-to)3459-3464
Number of pages6
JournalProceedings of the IEEE Conference on Decision and Control
StatePublished - 1995
EventProceedings of the 1995 34th IEEE Conference on Decision and Control. Part 1 (of 4) - New Orleans, LA, USA
Duration: Dec 13 1995Dec 15 1995

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Modeling and Simulation
  • Control and Optimization


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