کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
726775 | 892651 | 2013 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electric stress distribution in paper oil insulation due to sulphur corrosion of copper conductors Electric stress distribution in paper oil insulation due to sulphur corrosion of copper conductors](/preview/png/726775.png)
Failure of paper oil insulation due to formation of copper sulphide in transformer windings is a serious issue affecting the performance and life of large transformers. Though chemical effects leading to corrosion are well understood, quantification of electric stress and its correlation to formation and migration of copper sulphide has not been reported in literature. Hence electric stress distribution under copper corrosion using FEM simulation has been studied and discussed in this paper. The simulation results are compared and correlated to experimental findings. The study clearly points towards increase in electric stress in unaffected paper and non-uniform electric stress distribution in paper–oil insulation system. Implications of using enamel coating on copper conductor as a mitigation technique to combat copper corrosion is also discussed.
Journal: Journal of Electrostatics - Volume 71, Issue 3, June 2013, Pages 429–434