학술논문
Study on the Contamination Rate of Mineral Oil in Natural-Ester Retrofilled Transformers
Document Type
Periodical
Author
Source
IEEE Transactions on Dielectrics and Electrical Insulation IEEE Trans. Dielect. Electr. Insul. Dielectrics and Electrical Insulation, IEEE Transactions on. 30(4):1641-1648 Aug, 2023
Subject
Language
ISSN
1070-9878
1558-4135
1558-4135
Abstract
The replacement of mineral oil (MO) by ester (retrofilling) is a practice used in power transformers to reduce fire and environmental risk. Although measures are taken to remove traces of oil on the paper, a certain amount of MO remains, which migrates over time. This article presents a study to evaluate the migration of MO from paper to ester using techniques such as the iodine value or the measurement of permittivity and dielectric losses.