Critical node analysis (CNA) in power grids under enhanced restoration options

Venkat Venkateswaran, Alex Aved, David Ferris, Philip Morrone

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In recovering from cyber attacks on power grids, restoration steps have also included disconnecting parts of the network to prevent failures from propagating. Inspired by these reports we investigate how this may be performed optimally. We show how throughput can indeed be increased by selectively disconnecting links when the network is currently stressed and unable to meet all of the demands. We also consider the impact of this option on critical node analysis. For defensive as well as offensive scenario planning it is important to be able to identify the critical nodes in a given network. We show how ignoring this option of disconnecting links can lead to misidentifying critical nodes, overstating the impact of these nodes. We outline an iterative procedure to address this problem and correctly identify critical nodes when link disconnection is included in the recovery scheme.

Original languageEnglish (US)
Title of host publicationGeospatial Informatics XI
EditorsKannappan Palaniappan, Gunasekaran Seetharaman, Joshua D. Harguess
ISBN (Electronic)9781510643031
StatePublished - 2021
EventGeospatial Informatics XI 2021 - Virtual, Online, United States
Duration: Apr 12 2021Apr 16 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceGeospatial Informatics XI 2021
Country/TerritoryUnited States
CityVirtual, Online


  • Critical node analysis
  • Network optimization
  • Power network restoration

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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