Analysis Of The Inter-Area Mode Phenomenon In Power Systems Following Large Disturbances

V. Vittal, A. A. Fouad, N. Bhatia

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86 Scopus citations


This paper deals with the analysis of the inter-area mode phenomenon in stressed power systems following large disturbances. It is shown that the inter-area mode phenomenon could occur as a result of a nonlinear interaction of the natural modes of oscillation in the system. A technique to determine the interaction is developed and the machines participating in the interaction are identified. A procedure to predict the onset of the inter-area mode is presented. The analysis and the procedure developed are tested on two systems: a 50-generator system and a 126-generator system.

Original languageEnglish (US)
Pages (from-to)1515-1521
Number of pages7
JournalIEEE Transactions on Power Systems
Issue number4
StatePublished - Nov 1991
Externally publishedYes


  • Natural Modes of
  • Nonlinear Interaction of Modes
  • Oscillation
  • Transient Stability
  • and Participation Factors

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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