NDLI: Transformer insulation life assessment

Content Provider	IEEE Xplore Digital Library
Author	Muthanna, K.T. Sarkar, A. Das, K. Waldner, K.
Copyright Year	1986
Abstract	This paper presents novel techniques for life assessment of the insulation of the generator stepup units in power plants. Load and ambient temperatures are two important factors that influence the life of insulation in transformers. Hourly load and ambient temperatures obtained through condition monitoring are used to assess the operating profile of the equipment. Modeling techniques for estimating load factors and the ambient temperatures using the operating history are discussed in this paper. The estimated load factors and ambient temperatures are input to the IEEE life consumption models to assess the consumed life of insulation. A full simulation approach and a renewal process approach have been presented to evaluate the time to failure of the insulation. Estimation of some relevant reliability parameters such as B/sub X/ life, time-to-reach design life, and probability of failure at a given time are also presented. The methods discussed are useful for estimating residual life of insulation to support the repair and maintenance policies of transformers.
Sponsorship	IEEE Power Engineering Society
Starting Page	150
Ending Page	156
Page Count	7
File Size	503313
File Format	PDF
ISSN	08858977
Volume Number	21
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Power transformer insulation Insulation life Oil insulation Power transformers Temperature Power generation Life estimation Condition monitoring History Costs Weibull distribution Ambient temperature simulation generator stepup units (GSU) hourly load simulation insulation life oil-immersed transformers power transformers renewal theory
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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