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Corona Aging Studies on Silicone Rubber Nanocomposites

Venkatesulu, B and Thomas, M Joy (2010) Corona Aging Studies on Silicone Rubber Nanocomposites. In: IEEE Transactions on Dielectrics and Electrical Insulation, 17 (2). pp. 625-634.

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Abstract

In EHV and UHV power transmission lines, corona could occur even on well designed transmission line hardware and insulators especially under wet conditions. Corona if allowed to occur continuously can significantly damage the polymeric insulators used in such lines in the long run. This paper presents the experimental results of corona aging studies conducted on unfilled silicone rubber as well as filled silicone rubber nanocomposites. Corona aging studies were conducted on silicone rubber samples with filler concentrations of 0, 1, 2 and 3 % by wt of nanosilica for 25 h and 50 h. Needle-plane electrode geometry has been used to create the corona on the samples. Different characterization techniques such as Scanning Electron Microscopy, Energy Dispersive X-ray analysis, Hydrophobicity, Fourier Transform Infrared Spectroscopy, and Optical Profilometry have been used to assess the relative performance of the samples with respect to corona aging. Results indicate that at 3 wt %, the performance of the nanocomposite is much better than the unfilled silicon rubber which can be attributed to the modifications in the material caused by the size factor of the filler.

Item Type: Journal Article
Additional Information: Copyright 2010 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: Outdoor insulators; composite polymeric insulators; silicone rubber; nanocomposites; corona; hydrophobicity.
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 19 Oct 2010 07:22
Last Modified: 19 Oct 2010 07:22
URI: http://eprints.iisc.ernet.in/id/eprint/33142

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