Resilience Assessment of Cyber-Physical Power System based on Weak Interdependency Against Coordinated Attacks Considering Corrective and Expected Vulnerabilities

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Document Type : Original Article

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Faculty of Electrical and Computer Engineering, Tarbiat Modares University

Abstract

Cyber-dependent control capability of the power grid has been recently provided, introducing a wide range of the new cyber-physical risks. This paper is devoted to the vulnerability assessment of this interdependent system under different types of coordinated cyber (denial of service to disrupt control centers) and physical (intentional failure of physical equipment) attacks. Herein, an aggregated vulnerability index (VI) is proposed, taking into account both deterministic (direct consequences) and probable (due to the degradation) effects of the attacks. The suggested index consists of three key factors of inherent, corrective (based on a different variety of the operation corrective actions) and expected load shedding. Until now, this expected VI has not been yet investigated well in the literature. This work is novely focused on this probable impact due to the degradation of the cyber network. This study aim to handle the problem complexity by providing a simplified fast yet sufficiently accurate framework. The method’s correctness and effectiveness are demonstrated based on the simulation results of the IEEE 39-bus test systems, with comparisons to cascading failure process. The numerical results also highlight the computational efficiency of the proposed method rooted in its straightforward calculations.

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Tabriz Journal of Electrical Engineering

Articles in Press, Corrected Proof
Available Online from 06 May 2026

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