Reliability analysis of service routing for a power system communication network based on MCS‐RBD

Abstract

The Reliability Block Diagram (RBD) is widely used to calculate the reliability of power systems, while it can hardly distinguish the states of information transmission between normal and fault. To reflect the reliability level of the transmission route objectively, a Modified Cut Set of RBD (MCS‐RBD) is put forward. Traditional Traffic Routing Assignment Algorithms such as Open Shortest Path First (OSPF) and Optimized Link State Routing Protocol (OLSR) cannot balance the risk of excessive service concentration in the communication network of power systems. Hence, a Service Importance Balance‐Based Traffic‐Routing Assignment Algorithm (SIBTRA) is introduced to adjust the service distribution to avoid excessive concentration properly. In this study, important degrees of services are determined, respectively, whereby complete sets (CSs) and tie sets (TSs) of a communication network are built, which includes a source‐node station and a destination‐node station. Moreover, reliability of every node and path is calculated. Consequently, the system reliability of the optical transmission network is determined by all the elements described above. Meanwhile, the reason for using SIBTRA to balance the service distribution of the electric power communication can be assessed. Besides node reliability and path reliability, service‐routing reliability of communication networks before and after renovation is computed using MCS‐RBD and compared simultaneously, which validates the ability and feasibility of the MCS‐RBD positively. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.