Original scientific paper

Condenser bushings condition monitoring

K.K. Murty

Abstract

This article focuses on condenser bushings monitoring, of both oil-impregnated and resin-impregnated paper bushings, for extra high-voltage class transformers in order to avoid a catastrophic transformer failure that might result from a failed bushing. A brief description of the online monitoring system is presented, highlighting its superiority over conventional offline monitoring practices. This is followed by a true case study and a specimen cost-benefit analysis related to a failure of a 160 MVA, 220/132/33 kV transformer and its assumed down time of 72 hours at a substation in India, caused by a failure of a 245 kV oil-impregnated paper bushing.

Keywords

bushing; tan δ; capacitance; infrared thermography

Hrčak ID:

202527

URI

https://hrcak.srce.hr/202527

Publication date:

23.11.2017.

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