Network attack risk assessment of power grid CPS System based on attacker’s perspective

Abstract

Network attack is one of the hidden dangers affecting the safe and stable operation of power system. In this paper, a potential attack path is established through association algorithm, and the selection probability of the attack path is analysed comprehensively considering the attacker’s ability, the characteristics of the attack behavior and the characteristics of the target network, and then an improved directed acyclic network attack probability attack graph is established. At the same time, the impact factors of attack action layer and attack target layer are established from the information side and the physical side, and then the incidence of the attack on the whole CPS system is analysed quantitatively, which improves the comprehensiveness and accuracy of the impact consequence analysis of network attacks. Through the above steps, the potential attack path and the risk value of the system are obtained, and the risk level of the CPS system under the current attack is determined by the fuzzy evaluation method.