Service Risk Evaluation Of Large Capacity Backbone Eletric Power Communication Network

With the construction and development of smart grid in our country,the large capacity backbone electric power communication network has become the main support platform of the smart grid.Because of its wide coverage area,the impact of natural disasters and other reasons,in carrying large capacity information transmission,the communication process once interrupted will bring huge losses,but also will cause serious social impact.Therefore,it is necessary to evaluate the risk of the backbone communication network.Traditional risk evaluation for network service has some reference value in it,but using simple evaluation methods and can lose sight of the relationship between network units and services in the actual network,thus leading to relatively ideal risk evaluation results.This makes it hard to put it into practical application.This paper based on the actual large capacity backbone electric power communication network,using the method of probabilistic risk evaluation,conducting the service risk evaluation of the communications network.Firstly,the actual operation situation and the network service configuration of the backbone electric power communication network are analyzed,based on this,giving the failure analysis of nodes and links;Then,the risk evaluation model is established on the basis of markov theory,according to the failure rate and repair rate determine the failure status of network,and simplify the failure state of markov model;Finally,the multiple instances of network risk analysis,compare the different parameters,the influence of the network scale of network risk,and the validity and feasibility of the proposed service risk evaluation method is verified.The results of case analysis can effectively evaluate the network service risk,analysis the failure service relation to the state of the network units and has a certain engineering value.