Cross-Space Risk Assessment of Cyber-Physical Distribution System Under Integrated Attack

Cross-Space Risk Assessment of Cyber-Physical Distribution System Under Integrated Attack

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Assessing cross-space risk of cyber-physical distribution system under integrated attack is investigated in this paper.Firstly, a hierarchical structure of cyber-physical distribution network according to IEC 61850 is established and a deliberate attack scenario with limited adversarial knowledge and stealth requirement is developed based on PPE Supplies a general linear model for state estimation.Then, we formulate two optimization problems to describe the attack implementation and propagation process and obtain the likelihood of attacks including a robust solution and a risk solution in a fuzzy Bayesian network (BN).

On this basis, a physical impact metric is defined as the integrated deviation of system states and measurements.Thus, the cross-space risk assessment can be performed.Finally, the simulation results of case studies demonstrate wheel insert that the proposed method is effective and provides a broad and clear view of cyber-physical distribution system security situation.