Raman spectroscopy of 200 kV and 400 kV service-aged silicone rubber insulation in the Gulf region

DOIResolve DOI: http://doi.org/10.1109/CEIDP.2016.7785530
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TypeArticle
Proceedings title2016 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)
Conference2016 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), October 16-19, 2016, Toronto, ON, Canada
ISBN978-1-5090-4654-6
Pages810813
Subjectvoltage 400 kV; Raman spectroscopy; service-aged silicone rubber insulation; Gulf region; silicone rubber housing material; transmission line insulators; sands; dusts; creepage distances; heavily-polluted conditions; IEC 60815; light-aging condition
AbstractIn this paper Raman spectroscopy is performed on silicone rubber housing materials that have been taken from 200 kV and 400 kV transmission line insulators, located in the Gulf region. The service areas of these insulators feature heavy depositions of sands and dusts yet with intermittent durations of fog and wetting on the surface. In addition, the creepage distances have been selected for heavily polluted conditions as per IEC 60815, thereby expecting light aging conditions for the analyzed housing materials. The increase in the Raman band intensity of Si-OH rationed to the Raman band intensity of Si-O-Si is found as a useful aging indicator for the analyzed surfaces. On the other hand, a careful analysis is required when using the Raman band intensity of alumina tri-hydrate rationed to the Raman band intensity of Si-O-Si in order to indicate the reduction in the polymer content due to aging. Ultra-violet radiation oxidizing the surface is the main factor reported to deteriorate the analyzed materials. An increased influential effect is also speculated for both the aging time in service for the 200 kV insulators and for electric field enhancement inducing surface discharges as approaching the energized side of the 400 kV insulators. Using Raman spectroscopy to assess the condition of service-aged silicone rubber insulators can be advantageous as, with a special apparatus, this method can be implemented on site.
Publication date
PublisherIEEE
LanguageEnglish
AffiliationMeasurement Science and Standards; National Research Council Canada
Peer reviewedYes
NPARC number23001326
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Record identifier0180d07a-526c-484c-a4f4-48db8af1bdf5
Record created2017-01-17
Record modified2017-01-17
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