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.
Highlights
Power communication network serves grid automation control commercial operation and modern management [1], which is the basement of the power system security and stability control system, the safety and reliability of the electric power communications network impact seriously on the security of the power system production [2,3]
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
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
Summary
Power communication network serves grid automation control commercial operation and modern management [1], which is the basement of the power system security and stability control system, the safety and reliability of the electric power communications network impact seriously on the security of the power system production [2,3]. Ice storm causing huge damage to the electric power communication network in recent years that affected the delivery of the electricity business seriously [4,5,6] arouses the scholars to research in-depth and proposes new requirements on the reliability of the power system communication network. This article draws on some of the results of the public network combined with the special needs of the electric power communication network, and puts forward the suitable reliability evaluation method of the power communication network in case of the ice storm
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