A Study on the Health Evaluation Method of Oil-immersed Transformer through Analysis of Insulating Oil 


Vol. 38,  No. 6, pp. 1-8, Dec.  2023
10.14346/JKOSOS.2023.38.6.1


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  Abstract

The health state of the oil transformer is evaluated by the age of use and the state of internal defects. Mineral Oil, used as an insulator for oil transformers, creates specific gases and compounds through chemical reactions caused by heat, moisture, and partial discharge inside the transformer. It is possible to determine the aging and defect of the transformer through these gases and compounds. So, it is an important indicator to evaluate the health of a transformer. In this study, factors for assessing the health of transformers were hierarchically categorized, and key factors for each hierarchy were selected for design weighting. These weights were determined through surveys conducted with experts in the fields of transformer design, operation, and quality. For the health of a transformer, defect-related factors are approximately three times more important than factors related to aging. Additionally, defect-related factors showed a higher weighting for gases generated at high temperatures. Furthermore, Furan was determined to have a high weight, directly associated with insulating paper aging. Based on these findings, a health index was proposed, and a comparative analysis was conducted by categorizing 40 operational transformers into normal and comparison groups to evaluate and validate it.

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  Cite this article

[IEEE Style]

신연진 and 임재용, "A Study on the Health Evaluation Method of Oil-immersed Transformer through Analysis of Insulating Oil," Journal of the Korean Society of Safety, vol. 38, no. 6, pp. 1-8, 2023. DOI: 10.14346/JKOSOS.2023.38.6.1.

[ACM Style]

신연진 and 임재용. 2023. A Study on the Health Evaluation Method of Oil-immersed Transformer through Analysis of Insulating Oil. Journal of the Korean Society of Safety, 38, 6, (2023), 1-8. DOI: 10.14346/JKOSOS.2023.38.6.1.

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