A Sequential Coordinated Attack Model for Cyber-Physical System Considering Cascading Failure and Load Redistribution

摘要

With the massive deployment of cyber technologies in smart grid, the power system becomes more vulnerable to malicious cyber-physical attacks. Therefore, it is of great significance to analyze the reliability risk of cyberphysical system under malicious attack. This paper proposes a sequential coordinated attack framework for the cyberphysical system. It comprises the physical attack on the lines and cyber-attack by load redistribution (LR). More specifically, the cascading failure is also incorporated in the physical attack model and a new LR attack is proposed to cooperate with the physical attack in this paper. Then a Q-learning based solution algorithm is proposed to identify the optimal coordinated attack scheme. Finally, case studies on IEEE-39 bus system demonstrate the effectiveness of the proposed algorithm and compare the effects of coordinated attack and cascading attack.