Method for Determining Power System High Fragile Target Sequence Based on Community Structure

With the acceleration of the construction of smart grids, the continuous advancement of computing technology, communication technology and intelligent control technology, the supporting role of the information network to the traditional power grid has been strengthened day by day, and the traditional power system has been transformed into a power cyber-physical system (CPS) with real-time perception, dynamic control and information services. In the context of the deep integration of cyber physics, the spread of cyber-attacks is gradually expanding, which will not only destroy the control functions of the information system, but may also trigger the butterfly effect and threaten the stable operation of the physical system. In order to effectively protect the high fragility target sequence and grasp the damage degree of the power CPS network attack, a method for determining the high fragility target sequence based on the community structure is proposed. First, select the community center node, the global center node, and the edge nodes connecting important communities to form the initial target node set according to the division of information network communities, then combine the node shrinkage theory and node propagation ability to evaluate the vulnerabilities of target nodes and rank them, and finally the non-negative influence gain is used as the criterion to determine the high fragility target sequence of the cyber-attack.