TECHNICAL INFORMATION
Published in Energize | August 2022 | 50
By I.A.R. Gray, Oilwatch Transformer Service
Liquid impregnated cellulose materialsin the form of insulation paper are used in power transformers as electrical insulation and as mechanical support for the windings and leads. The mechanical strength of these materials will reduce over time. The thermal performances of these materials are of interest both for assuring a high quality of new units, and also for estimating remaining life for asset management. Managing an ageing transformer population requires decisions regarding life extension activities, e.g., transformer condition control, reclamation and drying, and life assessment for reinvestment. Knowledge of transformer ageing can either be based on diagnostic monitoring and ageing markers or by modelling of ageing kinetics.
Evaluation of transformer solid insulation (930 downloads )
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