Reliability Research On Network Structure Of Process Level In Digital Substation

In this paper,reliability research is applied in digital substation.Based on the hierarchical distributing structure of digital substation and the typical network structure of its process level,several ways for reliability research such as probability method and fault tree analysis and Markov state analysis are introduced to make some models and analysis so that the reasonable process level structures are secured.By the use of the repairable system theory,the reliability of the regular maintenance and state maintenance of protection configuration is analyzed through modeling.Based on the models and state analysis of the protection facility and protected element,the regular maintenance with self checking is deeply analyzed.A computer simulation of the above models presents the effect on the maintenance period produced by self checking.Besides, how to decide the economical period of the regular maintenance is discussed.