Online Risk-Based Security Assessment

N. M. Ni, J. D. McCalley, Vijay Vittal, T. Tayyib

Research output: Contribution to journalReview article

7 Scopus citations

Abstract

The work was motivated by a perceived increase in the frequency at which power system operators are encountering high stress in bulk transmission systems and the corresponding need to improve security monitoring of these networks. Online risk-based security assessment provides rapid online quantification of the security level associated with an existing or forecasted operating condition. One major advantage of this approach over deterministic online security assessment is that it condenses contingency likelihood and severity into indices that reflect probabilistic risk. Use of these indices in control room decision-making leads to increased understanding of potential network problems, including overload, cascading overload, low voltages, and voltage instability, resulting in improved security related decision-making. Test results on large-scale transmission models retrieved from the energy management system of a U.S. utility company are described.

Original languageEnglish (US)
Pages (from-to)59
Number of pages1
JournalIEEE Power Engineering Review
Volume22
Issue number11
DOIs
StatePublished - 2002
Externally publishedYes

Keywords

  • cascading
  • control center
  • decision-making
  • operations
  • overload
  • probabilistic risk
  • Security assessment
  • uncertainty
  • voltage instability

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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