Contingency Ranking Selection using Static Security Performance Indices in Future Grids

Lakna Liyanarachchi, Nasser Hosseinzadeh, Apel Mahmud, Ameen Gargoom, Ehsan M. Farahani

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Citations (Scopus)


Power system security assessment and enhancement in grids with high penetration of renewables is critical for pragmatic power system planning. Static Security Assessment (SSA) is a fast response tool to assess system stability margins following considerable contingencies assuming post fault system reaches a steady state. This paper presents a contingency ranking methodology using static security indices to rank credible contingencies considering severity. A Modified IEEE 9 bus system integrating renewables was used to test the approach. The static security indices used independently provides accurate results in identifying severe contingencies but further assessment is needed to provide an accurate picture of static security assessment in an increased time frame of the steady state. The indices driven for static security assessment could accurately capture and rank contingencies with renewable sources but due to intermittency of the renewable source various contingency ranking lists are generated. This implies that using indices in future grids without consideration on intermittent nature of renewables will make it difficult for the grid operator to identify severe contingencies and assist the power system operator to make operational decisions. This makes it necessary to integrate the behaviour of renewables in security indices for practical application in real time security assessment.
Original languageEnglish
Title of host publication2020 Australasian Universities Power Engineering Conference, AUPEC 2020 - Proceedings
Subtitle of host publicationConference Proceedings
EditorsMichael Negnevitsky
Place of PublicationTasmania
PublisherUniversity of Tasmania
Number of pages6
ISBN (Electronic)978-1-922352-76-7
ISBN (Print)978-1-6654-2540-7
Publication statusPublished - Nov 2020
Externally publishedYes
EventAustralasian Universities Power Engineering Conference, 2020 - Hobart, Australia
Duration: 29 Nov 20202 Dec 2020

Publication series

Name2020 Australasian Universities Power Engineering Conference, AUPEC 2020 - Proceedings


ConferenceAustralasian Universities Power Engineering Conference, 2020
Abbreviated titleAUPEC 2020


  • Power system security
  • Contingency ranking
  • Static Security Assessment
  • Contingency selection
  • Real power performance index
  • Voltage performance index
  • Renewable technologies
  • Power System Security
  • Contingency Ranking
  • Real Power Performance Index
  • Contingency Selection
  • Voltage Performance Index


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