The Reliability Evaluation Method Study of Power System Communication Networks in Case of Ice Storm

Jianghua Yang, Huan Teng, Chonggu Yao, Nian Liu, Bin Sun, Hanyun Yuan, Ming Liu, Jialin Bai

Guizhou Electric Power Grid Dispatching and Control Center, Guiyang, China.
School of Electrical Engineering & Information, Sichuan University, Chengdu, China.
School of Electrical Engineering & Information, Sichuan University, Chengdu, China; Sichuan Smart Grid Key Laboratory, Chengdu, China.

DOI: 10.4236/eng.2013.59B006                

Abstract

This paper is divided into two cases to study the communication transmission equipment reliability in the state of the ice storm, according to the huge losses of power system communication caused by the ice storm. For the nodes or links which are not affected by the ice storm, we use the calculation with “the mean time between failures (MTBF)” and “the mean time to repair” (MTTR) to put forward the calculation methods; for the OPGW cable which influenced greater in ice storm, we use the fiber excess length and the elongation of fiber optic cable. It obtains all the paths of the network through improved adjacency matrix method, and then it uses binary decision diagram to obtain the overall reliability of the network. By testing the network nodes and links using “N-1” inspection, the key nodes and key links can be obtained. Finally, considering the importance degree of network transmission business, the reliability evaluation method of power system communication network based on the risk theory in the case of the ice storm has been put forward, and the example to verify that the method can provide the basis for the reliability assessment of the power system communication in the case of the ice storm has been given.

Keywords

Ice Storm; Power Communication; Reliability; Risk Theory; Adjacency Matrix Method; Binary Decision Diagram

Conflicts of Interest

The authors declare no conflicts of interest.

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