Abstract
Power systems are evolving into cyber-physical energy systems (CPES) mainly due to the integration of modern communication and Internet of Things (IoT) devices. CPES security evaluation is challenging since the physical and cyber layers are often not considered holistically. Existing literature focuses on only optimizing the operation of either the physical or cyber layer while ignoring the interactions between them. This article proposes a metric, the cyber-physical energy system quantitative security metric (CPES-QSM), that quantifies the interaction between the cyber and physical layers across three domains: 1) electrical; 2) cyber-risk; and 3) network topology. A method for incorporating the proposed cyber-metric into operational decisions is also proposed by formulating a cyber-constrained ac optimal power flow (C-ACOPF) that considers the status of all the CPES layers. The C-ACOPF considers the vulnerabilities of physical and cyber networks by incorporating factors such as voltage stability, contingencies, graph theory, and IoT cyber risks, while using a multicriteria decision-making technique. Simulation studies are conducted using standard IEEE test systems to evaluate the effectiveness of the proposed metric and the C-ACOPF formulation.
Original language | American English |
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Pages (from-to) | 7577-7590 |
Number of pages | 14 |
Journal | IEEE Internet of Things Journal |
Volume | 10 |
Issue number | 9 |
DOIs | |
State | Published - 1 May 2023 |
Bibliographical note
Publisher Copyright:© 2023 IEEE.
NREL Publication Number
- NREL/JA-5R00-84691
Keywords
- Cyber metric
- cyber-physical energy systems (CPES)
- cybersecurity
- optimal power flow (PF)
- optimization
- power systems