An Importance Ranking Method of Distribution System Component based on Triangular Fuzzy Number

In the distribution system, the reliability and resilience of the distribution system can be improved by strengthening the critical components and repairing them first when they fail. To identify the critical components in the distribution system, this paper proposes an importance ranking method. The inaccuracy of line failure rate is considered by using the triangular fuzzy number, which makes the evaluation results more reliable. Fussell-Vesely importance measure index is used as the criterion to measure the importance of each component to the load node. The importance evaluation structure, which consists of system layer, load layer and component layer, is established according to the three-layer evaluation structure of the analytic hierarchy process(AHP). Finally, the proposed method is verified on a modified IEEE 37-node feeder test system.