Understanding performance of transmission and distribution insulators at very low temperature conditions

Nandi, S and Subba, BR and Sharma, D (2020) Understanding performance of transmission and distribution insulators at very low temperature conditions. In: Electrical Engineering .

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Abstract

Polymeric or silicone rubber insulators are extensively used for high-voltage transmission by electrical utilities due to advantageous features like lightweight, better contamination performance, etc. The performance of silicone rubber insulators exposed to low temperature conditions with continuous application of electric stress is of utmost importance as these insulators are being used under such climatic conditions in the country. In the present work, long-term experimental investigations have been conducted for 1000 h at 0 °C and for 1500 h at � 20 °C with application of electrical stress to simulate near-field conditions. A special experimental arrangement has been established for the investigations. Leakage current was monitored at regular intervals, and further material evaluation techniques like Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDAX), mechanical strength measurements, etc., were conducted before and after the experimentation to verify the surface degradation on the polymer insulators. Some interesting results obtained during the experimentation for normal and polluted conditions along with the analysis carried out are presented.

Item Type:	Journal Article
Publication:	Electrical Engineering
Publisher:	Springer
Additional Information:	Copy right for this article belongs to Springer
Keywords:	Energy dispersive X ray analysis; Fourier transform infrared spectroscopy; Insulating materials; Insulator contamination; Photodegradation; Rubber; Scanning electron microscopy; Silicone rubber; Silicones; Transmissions; X ray diffraction analysis, Contamination performance; Energy dispersive Xray analyses (EDAX); Experimental arrangement; Experimental investigations; High voltage transmissions; Low temperature conditions; Silicone rubber insulators; Transmission and distribution, Temperature
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	30 Sep 2020 09:55
Last Modified:	30 Sep 2020 09:55
URI:	http://eprints.iisc.ac.in/id/eprint/65818

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