NDLI: A new approach to study the effects of copper sulphide on electric stress distribution in paper oil insulation of transformers

Content Provider	IEEE Xplore Digital Library
Author	Flora, S.D. Kumari, M.K. Rajan, J.S.
Copyright Year	2014
Description	Author affiliation: Central Power Res. Inst., Bangalore, India (Flora, S.D.; Kumari, M.K.; Rajan, J.S.)
Abstract	Many cases of failures of power and converter transformers due to copper sulphide deposition on the insulating paper have been reported and the presence of corrosive sulphur in mineral oil has been identified as the cause of some of these failures. Though extensive research work has been carried out to understand the mechanism of formation and migration of copper sulphide, contribution towards understanding of electric stress distribution under copper corrosion is very limited. Hence electric stress distribution in paper-oil insulation of transformer under copper corrosion is studied using Finite Element Method (FEM) and the results are presented in this paper. This study attempts to correlate the deposition of copper sulphide on the individual paper layers to the variation in overall capacitance and conductivity of copper sulphide which gives better understanding of electric stress distribution in paper-oil insulation under conditions of copper corrosion. The results of this study will be useful in assessing the insulation damage caused by electric stress enhancement in transformer insulation due to deposition of copper sulphide.
Sponsorship	IEEE Dielectr. Electr. Insul. Soc.
Starting Page	198
Ending Page	202
File Size	287794
Page Count	5
File Format	PDF
ISBN	9781479927876
e-ISBN	9781479927890
DOI	10.1109/EIC.2014.6869375
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Stress Copper Conductors Oil insulation Conductivity Power transformer insulation Transformer Copper corrosion Copper sulphide Electric stress Finite Element Method Paper-Oil insulation
Content Type	Text
Resource Type	Article

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