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.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Emsley, A.M., Xiao, X., Heywood, R.J., Ali, M.: Degradation of cellulosic insulation in power transformers. Part 2: formation of furan products in insulating oil. IEE Proc. Sci. Measur. Technol. 147(3), 110–114 (2000)
Fofana, I.: 50 years in the development of insulating liquids. IEEE Electr. Insul. Mag. 29(5), 13–25 (2013)
Höhlein, I., Kachler, A.J.: Aging of cellulose at transformer service temperature. Part 2: influence of moisture and temperature on degree of polymerization and formation of furanic compounds in free-breathing systems. IEEE Electr. Insul. Mag. 21(5), 20–24 (2005)
Lundgaard, L.E., Hansen, W., Linhjell, D., Painter, T.J.: Aging of oil impregnated paper in power transformers. IEEE Trans. Power Delivery 19(1), 230–239 (2004)
Unsworth, J., Mitchell, F.: Degradation of electrical insulating paper monitored with high performance liquid chromatography. IEEE Trans. Electr. Insul. 25(4), 737–746 (1990)
De Pablo, A., Pahlavanpour, B.: Furanic compounds analysis: A tool for predictive maintenance of oil-filled electrical equipment. Electra 175, 9–18 (1997)
Shroff, D.H., Stannett, A.W.: A review of paper aging in power transformers. IEE Proc. C Gener. Transm. Distrib. 132(6), 312–319 (1985)
Ryadi, M., Jalbert, J.: Methanol marker for the thermal performance qualification of power transformers. In: IEC 2013 (2013)
Matharage, S.Y., Liu, Q., Wang, Z.D., Wilson, G., Dyer, P., Mavrommatis, P.: Generation of methanol and ethanol from inhibited mineral oil. In: INSUCON 2017 (2017)
Liland, K., et al.: Comparison between synthetic ester and mineral oil impregnated transformer paper aging markers. In: ICDL 2017 (2017)
Bare, C., Merritt, S.: Methanol as an aeging marker for in service transformers. IEEE Trans. Ind. Appl. 54(6), 6598–6602 (2018)
Jalbert, J., Gilbert, R., Denos, Y., Gervais, P.: Methanol: a novel approach to power transformer asset management. IEEE Trans. Power Delivery 23(2), 514–520 (2012)
Matharage, S.Y., Liu, Q., Wang, Z.D., Mavrommatis, P., Wilson, G., Jarman, P.: Ageing assessment of transformer paper insulation through detection of methanol in oil. In: ICPADM 2015 (2015)
Münster, T., Kinkeldey, T., Werle, P., Hämel, K., Preusel, J.: Comparison of a thermally accelerated aged oil-paper insulation of an open and hermetically sealed system. In: ISH 2019 (2019)
Imani, M.T., Homeier, K., Werle, P., Dräger, G.: How far are furan compounds reliable indicators for thermal aging of oil impregnated cellulose insulation? In: CEIDP 2018 (2018)
Acknowledgments
The authors would like to express their gratitude towards Weidmann Electrical Technology AG and GRID INSPECT GmbH for their support of this research.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2020 Springer Nature Switzerland AG
About this paper
Cite this paper
Homeier, K., Imani, M., Münster, T., Kinkeldey, T., Werle, P., Philipp, D. (2020). Influence on Formation of Methanol and Ethanol in Oil-Filled Transformers Under Accelerated Thermal Aging. In: Németh, B. (eds) Proceedings of the 21st International Symposium on High Voltage Engineering. ISH 2019. Lecture Notes in Electrical Engineering, vol 598. Springer, Cham. https://doi.org/10.1007/978-3-030-31676-1_90
Download citation
DOI: https://doi.org/10.1007/978-3-030-31676-1_90
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-31675-4
Online ISBN: 978-3-030-31676-1
eBook Packages: EngineeringEngineering (R0)