State Assessment of Relay Protection Device Based on Defect Information

摘要

Considering the state assessment of relay protection device gray and fuzzy, an analytical method based on the combination of grey correlation analysis and apriori correlation analysis is proposed in this paper. Defect information data from the operation and maintenance of actual substations are used to assess and predict the status of relay protection devices which are affected by different manufacturers, different equipment types, operation time and maintenance records. Seven types of correlation rules are obtained in the research, and the analytical results can provide a strong scientific basis for targeted maintenance and operation plans based on the specific results in the correlation rules. The results provide a software package for the evaluation of relay protection devices in a regional substation of Shanghai power supply company of the State Grid.