Power Transformer Condition Monitoring by 2FAL Content and CO2/CO ratio - a Fuzzy Logic Approac

The condition of the solid insulation paper within transformers can be directly determined from the degree of polymerization (DP) measured from samples. Since this is difficult for in service units, many studies have been performed in regard with indirectly measuring the degradation of paper insulat...

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Bibliographic Details
Main Authors: EKE, Samuel, AKA-NGNUI, Thomas, CLERC, Guy, FOFANA, Issouf
Format: Conference Proceeding
Language:English
Subjects:
Degradation
Fuzzy logic
Oil insulation
Oils
Power transformer insulation
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Summary:The condition of the solid insulation paper within transformers can be directly determined from the degree of polymerization (DP) measured from samples. Since this is difficult for in service units, many studies have been performed in regard with indirectly measuring the degradation of paper insulation by chemical markers for several decades. The 2-FAL concentration is being used decades ago. In this contribution, condition monitoring history and experience with transformer fleets are reported for a service aging of 75 years. 37 oil-filled transformers (146.7 kV to 157 kV) of a Canadian utility were periodically monitored. As part of the maintenance of the apparatus, the analysis of the furanic compounds is carried out. These are obtained by high performance liquid chromatography in a laboratory, with a regularity that varies according to the age of the transformer. This article deals with a transformer aging evaluation tool built from fuzzy logic. A fuzzy inference system is implemented by taking as input the values of 2-FAL and CO 2 /CO ratio. The tool helps directly providing the paper condition.
ISSN:2576-2397
DOI:10.1109/CEIDP47102.2019.9009691