NDLI: Investigation on Degradation of Power Transformer Solid Insulation Material

Content Provider	IEEE Xplore Digital Library
Author	Homagk, C. Mossner, K. Leibfried, T.
Copyright Year	2008
Description	Author affiliation: Inst. of Electr. Energy Syst. & High Voltage Technol., Univ. of Karlsruhe, Karlsruhe (Homagk, C.; Mossner, K.; Leibfried, T.)
Abstract	Power transformers are vital parts of electric energy transmission and generation systems. Numerous power transformers in the European power grid have reached an age of 30 years or even more and are possibly close to their end of life. Because of economic reasons it is demanded to keep current assets as long as possible in service without taking the risk of a failure. The DP (degree of polymerization) value is an indicator for the mechanical stability of Kraft paper insulation. The ageing process depends on the transformer's operation temperature and is accelerated by the presence of moisture and acids in the insulation system. During the decomposition reaction of cellulose chains furanic compounds and water is generated. In this paper investigation results from samplings of solid insulation material and their correlation to the concentration of furfurals in oil are presented. These investigations have been carried out during scraping of power transformers that have been put out of service due to failure or replacement. The distribution of the DP value over the insulation system shows a non-uniform ageing of the paper material.
Starting Page	75
Ending Page	78
File Size	1875074
Page Count	4
File Format	PDF
ISBN	9781424425488
DOI	10.1109/CEIDP.2008.4772830
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-26
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Degradation Power transformers Solids Power transformer insulation Aging Oil insulation Power generation Power grids Power system economics Power generation economics
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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