A Globally Cooperative Recovery Strategy for Cyber-Physical Power System Based on Node Importance

With the development of cyber technology, the intelligence of power systems has increased, and cyber-physics is highly integrated and mutually constrained. In this paper, a globalized cyber-physical cooperative recovery strategy based on node importance is proposed for the failure of a cyber-physical power system under communication failure. First, the static importance of communication nodes and the importance of services are comprehensively analyzed based on the structural business transmission function characteristics of the network. Secondly, based on the fault characteristics of generators, power lines, and loads, the recovery model of the physical system is constructed by considering the safety constraints such as system frequency, node voltage, and line capacity. Finally, considering the possible delay caused by the cyber system failure to the generator output regulation, power line commissioning, and load recovery, the interaction model of physical system recovery and cyber system recovery is established and solved by using the solver after linearizing it. The results show that the cyber-physical recovery strategy can effectively reduce outage losses and improve recovery efficiency.