Statistical Methods for Accelerated Life Testing with Particular Reference to Resin Impregnated Paper Bushings

Jyothi, NS and Ramu, TS (2012) Statistical Methods for Accelerated Life Testing with Particular Reference to Resin Impregnated Paper Bushings. In: Asia-Pacific Power and Energy Engineering Conference (APPEEC) , MAR 27-29, 2012 , Shanghai, PEOPLES R CHINA.

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Abstract

Electrical failure of insulation is known to be an extremal random process wherein nominally identical pro-rated specimens of equipment insulation, at constant stress fail at inordinately different times even under laboratory test conditions. In order to be able to estimate the life of power equipment, it is necessary to run long duration ageing experiments under accelerated stresses, to acquire and analyze insulation specific failure data. In the present work, Resin Impregnated Paper (RIP) a relatively new insulation system of choice used in transformer bushings, is taken as an example. The failure data has been processed using proven statistical methods, both graphical and analytical. The physical model governing insulation failure at constant accelerated stress has been assumed to be based on temperature dependent inverse power law model.

Item Type:	Conference Paper
Series.:	Asia-Pacific Power and Energy Engineering Conference
Publisher:	IEEE
Additional Information:	Copyright for this article belongs to IEEE, NEW YORK,
Keywords:	epoxy resin impregnated insulation;EHV insulation;life estimation;maximum likelyhood estimation
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	07 Feb 2013 11:50
Last Modified:	07 Feb 2013 11:50
URI:	http://eprints.iisc.ac.in/id/eprint/45749

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