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Experience with return voltage measurements for assessing insulation conditions in service aged transformers

descriptionPublicationkeyboard_double_arrow_right Conference object , Article , Other literature type , Journal 01 Aug 2002 Australia Publisher:IEEEJournal:2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491)

Authors: Yao, Zheng Tong; Saha, Tapan K.;

doi: 10.1109/pes.2003.1271006 , 10.1109/tpwrd.2002.803722 , 10.1109/mper.2002.4312523

Experience with return voltage measurements for assessing insulation conditions in service aged transformers

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Abstract

This paper describes the investigation of the insulation condition of a number of power and distribution type transformers of different manufacturing dates and with different operating histories. Return voltage measurements were conducted for these transformers. Effects of moisture and ageing on the oilpaper insulation of these transformers were investigated and results are presented in this paper. Moisture in oil samples at known temperature was measured for these transformers. Previously accelerated ageing experiments were performed on paper wrapped insulated conductors in different environments over a temperature range of 115 to 145/spl deg/C. Results from the measurements on transformers are compared with those of the accelerated aged samples and are described in this paper.

Country

Australia

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Keywords

polarization, condition monitoring, dielectric measurement, power transformer, 621, molecular weight, insulation aging, insulation life, transformer insulation, 290901 Electrical Engineering

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	citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	77
	popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.	Top 10%
	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Top 1%
	impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.	Top 10%