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Comparison between synthetic ester and mineral oil impregnated transformer paper aging markers

Comparison between synthetic ester and mineral oil impregnated transformer paper aging markers

Category
Part of a book/report
Abstract
For transformers in service, aging markers from cellulose in oil such as furans, water, methanol and acids are measured for diagnostic purposes. The content of these indicators, measured in oil, may therefore vary with load, temperature, solid and liquid insulation aging, as well as marker stability and evaporative loss. Correction factors estimating the level of the aging marker to a reference temperature would make the diagnostic more relevant. In this study, correction factors for temperature differences have been estimated for different aging markers in insulation systems impregnated with either mineral oil or synthetic ester. In the case of mineral oil based systems, we observe correction factors for water, methanol and furans in line with previously reported findings. On the other hand, for the synthetic ester system, novel correction factors for water and methanol are suggested while for furans, no temperature dependence was observed.
Language
English
Author(s)
Affiliation
  • SINTEF Energy Research / Elkraftteknologi
  • Diverse norske bedrifter og organisasjoner
Year
2017
Published in
Proceedings of IEEE International Conference on Dielectric Liquids
ISSN
2153-3725
Publisher
IEEE conference proceedings
Book
2017 IEEE 19th International Conference on Dielectric Liquids - ICDL
Booklet
2017
ISBN
978-1-5090-4877-9