Fast contingency screening and evaluation for voltage security analysis

G. C. Ejebe, H. P. Van Meeteran, B. F. Wollenberg

Research output: Contribution to journalArticlepeer-review

92 Scopus citations


This paper describes a fast security analysis technique for voltage security assessment in an Energy Management System. The new method identifies the location of buses with potential voltage problems and thereby defines a voltage-sensitive subnetwork for contingency screening. This allows the evaluation of a large number of contingencies. The efficiency of this method is derived from the use of a voltage subnetwork to drastically reduce the number of bus voltages to be solved; and subsequently from the use of compensation techniques and sparse-vector methods (including adaptive reduction) for screening and final solution of contingencies. Results demonstrating the effectiveness of the method on a small and a large power system are presented.

Original languageEnglish (US)
Pages (from-to)1582-1590
Number of pages9
JournalIEEE Transactions on Power Systems
Issue number4
StatePublished - Nov 1988
Externally publishedYes


  • Security analysis
  • adaptive reduction
  • contingency analysis
  • sparse vectors
  • voltage-reactive power screening


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