File(s) under permanent embargo

Contingency ranking selection using static security performance indices in future grids

conference contribution
posted on 2020-11-29, 00:00 authored by Lakna Liyanarachchi, Nasser HosseinzadehNasser Hosseinzadeh, Apel MahmudApel Mahmud, Ameen GargoomAmeen Gargoom, E M Farahani
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.



AUPEC 2020. Power Engineering. Australasian Universities Conference (2020 : Hobart, Tasmania)


Institute of Electrical and Electronics Engineers


Hobart, Tasmania & Online

Place of publication

Piscataway, N.J.

Start date


End date










Publication classification

E1 Full written paper - refereed

Copyright notice

2020, IEEE


Michael Negnevitsky

Title of proceedings

AUPEC 2020 : Proceedings of the Australasian Universities Power Engineering Conference