Engineering Reliability Assessment And Research On Status Evaluation Strategy Of All-Fiber Optic Current Transformer

At present, more and more All-Fiber Optic Current Transformers(AFOCT)have been used in intelligent substation. Its unique structure and operational p rinciple makes it a difficult problem to evaluate the state of AFOCT. This pap er introduced the principle of AFOCT, induced the main technical parameters a nd potential factors that affect the stability of AFOCT, and categorized the ope rating state of AFOCT into fine, warning, abnormal, and serious state. Accordi ng to the Fuzzy theory, a state evaluation model has been built. Moreover, the correctness and feasibility of this method is verified by engineering examples,which laid the foundation for the follow-up study.With the rapid development of China’s power grid, regular maintenance grad ually can’t meet the requirements of intelligent substation maintenance, condition b ased maintenance has become the current trend of equipment maintenance. And th e equipment status assessment is the key of condition-based maintenance technol ogy. Condition assessment is an assessment model which predicts the fault tren d of equipments based on The current status of monitoring data, historical data and family data.This paper evaluates the running state of electric power secondary equipme nt based on the condition monitoring and fuzzy comprehensive evaluation meth od.Through the example analysis, the method summarized 6 factors which effecte d the operation of the AFOCT, estimated the working condition of the AFOCT,and provide a new method for condition based maintenance.