On-line dynamic-security contingency screening and ranking

Ka Wing Chan, R. W. Dunn, A. R. Daniels, J. A. Padget, A. O. Ekwue, P. H. Buxton, M. J. Rawlins

Research output: Journal article publicationJournal articleAcademic researchpeer-review

24 Citations (Scopus)


An on-line dynamic-security contingency screening and ranking system for large complex power systems, online algorithms for system-instability studies (OASIS), has been developed which is intended to provide a list of ranked contingencies for the current operational state of the power system every 15 min. A highspeed power-system simulator is used to predict, in real time, transient and dynamic stability from any initial power-system state together with an appropriate contingency list. OASIS uses a client/ server model and is designed to run on a heterogeneous computer network to avoid any limit to system size. The prototype of the assessor was completed in mid 1994 and field trials were carried out within an operational power-system-control centre using real online data taken from the system energy-management system. Implementation of OASIS and the results of the field trials are described.
Original languageEnglish
Pages (from-to)132-138
Number of pages7
JournalIEE Proceedings: Generation, Transmission and Distribution
Issue number2
Publication statusPublished - 1 Jan 1997
Externally publishedYes


  • Contingency ranking
  • Dynamic security
  • Power systems
  • Stability assessment

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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