Vulnerability Identification and Evaluation of Interdependent Natural Gas-Electricity Systems

Lu Nan, Lei Wu, Tianqi Liu, Yikui Liu, Chuan He

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The intensified interdependency of natural gas and electricity systems poses urgent needs and new challenges in identifying vulnerable components of the interdependent system, which could be significantly different from those of individual systems because of the interdependency. This paper proposes a method to identify and rank vulnerable components of interdependent natural gas-electricity systems. Specially, a topological model and the vulnerability index for the interdependent system are constructed, and vulnerable component identification method is put forward to select and rank components by simultaneously considering topological and functional vulnerabilities. The proposed vulnerable component identification method is quantitatively assessed via a security evaluation approach, which calculates electricity and gas supply-demand imbalance when the vulnerable components are out of service. Numerical results of a 6-bus electricity/7-node gas system and a modified IEEE 118-bus electricity/20-node gas system illustrate effectiveness of the proposed method.

Original languageEnglish
Article number8964308
Pages (from-to)3558-3569
Number of pages12
JournalIEEE Transactions on Smart Grid
Volume11
Issue number4
DOIs
StatePublished - Jul 2020

Keywords

  • Interdependent infrastructures
  • graph theory
  • node contraction
  • security evaluation
  • vulnerability index

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