@inproceedings{ba346a2507a54793b907ac92c244cabf,
title = "Influence on Formation of Methanol and Ethanol in Oil-Filled Transformers Under Accelerated Thermal Aging",
abstract = "This contribution investigates the suitability of short-chain alcohols for estimating the condition of a cellulose insulation in power transformers. To model an accelerated thermal aging of a transformer, strips of insulation paper impregnated with different insulation liquids were kept in a glass vessel, filled with the dielectric liquid and catalyzer inclusions, in a heating chamber. After oil sampling at predefined intervals, the concentrations of furanic compounds, the degree of polymerization (DP) value and the concentrations of methanol and ethanol in the insulation liquid were measured. Three different types of insulation liquids were utilized, such as the well-known uninhibited and inhibited mineral oil as well as a new inhibited insulation liquid with different oil components, inhibitor content and manufacturing process. These insulation liquids were investigated to obtain their various aging behavior regarding the generation of 2FAL and short-chain alcohols by thermal accelerated stress.",
keywords = "Cellulose deterioration, DP value, Ethanol, Methanol, Thermal aging",
author = "K. Homeier and M. Imani and T. M{\"u}nster and T. Kinkeldey and P. Werle and D. Philipp",
note = "Funding information: The authors would like to express their gratitude towards Weidmann Electrical Technology AG and GRID INSPECT GmbH for their support of this research.; 21st International Symposium on High Voltage Engineering, ISH 2019 ; Conference date: 26-08-2019 Through 30-08-2019",
year = "2020",
doi = "10.1007/978-3-030-31676-1_90",
language = "English",
isbn = "9783030316754",
series = "Lecture Notes in Electrical Engineering",
publisher = "Springer Nature",
pages = "958--968",
editor = "B{\'a}lint N{\'e}meth",
booktitle = "Proceedings of the 21st International Symposium on High Voltage Engineering",
address = "United States",
}