Efficient look-ahead load margin and voltage profiles contingency analysis using the tangent vector index method

Chia Chi Chu*, Sheng Huei Lee, Hsun Yuan Chuang

*Corresponding author for this work

Research output: Contribution to conferenceConference Paperpeer-review

4 Scopus citations

Abstract

Look-ahead contingency analysis involves how to predict the near-term load margin and voltage profiles with respect to voltage collapse points of a large number of post-outage systems. In this paper, an efficient curve-fitting-based algorithm will be developed. Instead of approximating the load margin as a quadratic function of voltage profiles with three unknown coefficients near the collapse point, we reformulate it as a quadratic function of voltage tangent vector profiles with only two unknown coefficients. Only two consecutive voltage tangent vector profiles are needed in the proposed formulation which involves less computational cost in comparisons with those required in existing methods. A. numerical stable method to calculate the tangent vector will be proposed first. Based on the load margin approximations predicted by the tangent vector, a general framework for look-ahead contingency selection, evaluation, and ranking will be developed. We will evaluate this method on several power systems. Simulation results demonstrate the efficiency and the accuracy of the proposed method.

Original languageEnglish
Pages225-230
Number of pages6
StatePublished - 2000
EventProceedings of the 2000 Power Engineering Society Summer Meeting - Seattle, WA, United States
Duration: 16 07 200020 07 2000

Conference

ConferenceProceedings of the 2000 Power Engineering Society Summer Meeting
Country/TerritoryUnited States
CitySeattle, WA
Period16/07/0020/07/00

Keywords

  • Load margin
  • Look-ahead contingency analysis
  • Tangent vectors
  • Test functions
  • Voltage collapse

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