Research On Invulnerability Analysis And Optimization Of Power Communication Network

Research on the invulnerability of power communication network is of great significance for evaluating the operation ability of the network,evaluating the damage degree of the network attack when it is attacked,and reducing the network loss.Because of the particularity of the topology and transmission of power communication network,it is limited to measure its invulnerability from a certain level.This research comprehensively considers network topology and business characteristics to carry out network invulnerability analysis,which can effectively improve the accuracy of evaluation.And through increasing the link redundancy to optimize the network,so as to improve the resistance to destruction.At first,this research analyzes the relevant research results and the current situation,and summarizes the methods of evaluating the invulnerability of the networks.The topology parameters of the power communication network,the service of the load and the flow characteristics in the link are analyzed.On this foundation,the structure entropy is used as the index to evaluate the power communication network,and the network optimization is studied.In the aspect of invulnerability evaluation,the heterogeneity and service characteristics of the network are taken as the comprehensive embodiment index of the node importance of the power communication network,to identify the node importance degree with similar topological position in the network,and to differentiate nodes' contribution to network.Then the traffic load in the link is introduced into the calculation of the structure entropy in the form of weight,and the evaluation index of structural entropy suitable for power communication network is obtained.When the network is attacked,the damage of power communication network is evaluated by the change of the structure entropy value after the node failure.In the optimization of power communication network,the method of increasing the link redundancy among the key nodes in the network is used to identify the key nodes,which can improve the network invulnerability by adding a few links.Finally,through simulation and comparative analysis,the feasibility and effectiveness of the network with the structure entropy of the power communication network to evaluate the network invulnerability and increase the link redundancy between the key nodes are validated.