Criteria for estimation of end of life of power and station transformers in service

Pradhan, MK and Ramu, TS (2004) Criteria for estimation of end of life of power and station transformers in service. In: 2004 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP '04, 17-20 October, Colorado,USA, 220 -223.

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Abstract

Power and Station transformers are among the more expensive and critical elements of a power system, so much so, failure of this component entails unacceptably long interruptions. Further, unscheduled, or, inadvertent failure thereof, has serious consequences on the maintenance of system reliability and revenue accrual. In principle, ensuring the reliability power transformers is a two-step process, involving the detection of an impending failure in its formative stage so as to preclude catastrophic failures and if, for any reason, an outage occurs, evolving an appropriate replacement strategy of the failed units in a minimum possible time. In diagnostic testing, physical parameters used as indices of impending failure shall he sensitive to the amount of ageing and shall possesses a reasonably high degree of correlation with dielectric strength and mechanical strength. Concerted research work is being carried out, the world over, to try and identify such properties of insulation as are sensitive to the amount of degradation. The authors of this paper aim to suggest techniques for acquisition and analysis of ageing data in order to propose a condition-monitoring schedule

Item Type:	Conference Paper
Publisher:	IEEE
Additional Information:	�©1990 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.
Department/Centre:	Division of Electrical Sciences > High Voltage Engineering (merged with EE)
Date Deposited:	12 Dec 2005
Last Modified:	19 Sep 2010 04:21
URI:	http://eprints.iisc.ac.in/id/eprint/4377

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