| With the development of smart grids,power information communication networks are becoming more and more important in the safe and efficient production and operation of power systems.At the same time,the functions of the power information communication network are becoming more and more complex,and the network is gradually facing more security risks,which poses a challenge to the safe and efficient production and operation of the power system.Therefore,it is of great significance to analyze and study the security risk propagation issues and risk immunity protection issues of power information communication networks.This article mainly analyzes the security risk propagation process of the electric power information communication network and the corresponding immune protection strategy.First of all,this article combines the characteristics of the topological structure of the electric power information and communication network,based on the theory of complex networks,establishes a complex network model of the electric power information and communication network.Aiming at some security risks that electric power information and communication networks may face,based on the SIR model and considering the characteristics of electric power information and communication networks,a SIBR risk propagation model is established.The SIBR risk propagation model is applied to the security risk propagation process of the network.Three sets of calculation examples are used for simulation,and two attack strategies,random attack and deliberate attack,are used to compare the risk propagation process to establish a foundation for subsequent immune protection.Secondly,according to the security risk propagation process of the power information communication network,combined with the network topology characteristics and the node equipment protection methods in practical applications,the immune strategy to suppress the continuous propagation of network security risks is analyzed,that is,based on degree distribution parameters and based on neighbor node characteristics.The immune strategy of NI(i)parameters and the immune strategy of node isolation considering the structural characteristics of the network community.Three sets of calculation examples are used for simulation to verify and compare the effectiveness of corresponding immune strategies in the process of security risk propagation.Finally,on the basis of the previous two chapters,further consider the relationship between the power information and communication network topology and the network’s ability to resist the spread of security risks.From the perspective of topology optimization of the network topology within a certain range of practical application constraints,the network is improved.The immune protection ability.Aiming at the optimization process,an improved binary particle swarm optimization algorithm is introduced,and the connectivity is determined by deep traversal search,and the optimization algorithm process of topology optimization is established.The optimization strategy is applied to the process of analyzing the risk protection strategy of the electric power information communication network and simulation is carried out.In view of the large number of network nodes in practical applications,a network branch reorganization search strategy based on the neighbor matrix is further established to quickly determine the connectivity of the network.The paper has 44 pictures,1 table,and 74 references. |
