Research on condition based maintenance for power transmission system

AO Lei-lei1, WANG Hui-fang1, DU Zhen-dong2

(1. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;

2. The Economic and Technical Research Institute, Zhejiang Electric Power

Corporation, Hangzhou 310008, China)

Abstract: Aiming at the safe and statistical operation requirements of the power transmission systemcannot be met by condition based maintenance(CBM) decision-making results for individual device, from an entire system prospect, the concept of CBM for power transmission system was proposed,and a maintenance decision-makingmodel based on D-S evidence theory was established. Under the consideration of the real-time correlation between the devices, and the system both, the guiding principles were also summarized which are the basic of the combination and selection of all possible schemes based on the individual decision-making, and then the collection of the possible schemes of the system can be selected out. Then, the decision-making indicators which are the reflection of the safety, reliability and economy of the power transmission system were established, and their quantitative methods were given. The optimalscheme can be selected out by the established model of which the evidences are these independent indicators and the BPA values are the normalized values of the indicators beneath each possible scheme. The numerical result shows that, the individual equipment and the entire power transmission system are both on a safety operation level.