Power Information Physical Collaborative Recovery Strategy Based On Node Importance Under Communication Failure

With the rapid development of intelligence and informatization in the power grid,the communication status of the power system has a deepening impact on the process of power grid fault recovery.After a power grid failure,traditional recovery strategies tend to prioritize the recovery of physical systems while neglecting information systems,resulting in a lack of coordination between the two.Studying the collaborative recovery strategy of power grid information physics in the event of communication failure is of great significance for reducing fault losses and ensuring the safe and stable operation of the power grid.This article conducts research on information physical globalization and grid based collaborative recovery strategies under communication failure based on node importance.This article first studies the importance indicators for establishing nodes in the power information physical system.On the physical side,power node failures can affect the operation of the system.The electrical dielectric constant is selected as the influencing factor,and the factors of node connectivity,power loss,and voltage are also considered to establish the importance index of power nodes.On the information side,starting from the structure of the network,node degree and clustering coefficient are selected,while considering the business transmission function characteristics of the information side,the importance of power business is comprehensively considered,and the importance index of communication nodes is established.Secondly,considering the importance of nodes and the recovery delay of the power physical system caused by communication failures,a physical system and information system interaction recovery model is constructed with the goal of minimizing load recovery speed and power outage losses.After linearization,the model is integrated into a nonlinear programming problem for solution.Finally,a global and grid based collaborative recovery strategy is proposed,where the former considers the system as a whole and constrains the number of recovery resources to achieve a fault recovery strategy that matches the physical and information systems;The latter establishes a grid partitioning model based on the recovery resources and the location of power nodes,and allocates the recovery resources one by one to the corresponding grid to coordinate the recovery of fault points on both sides of the system.The results show that the proposed global collaborative recovery strategy based on node importance can effectively improve the recovery speed of power system load,reduce the time required for recovery,and reduce losses caused by power outages in the event of communication failure.