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4. Identification of partial discharges in power transformers: An approach driven by practical experience

Author

F. Negri, U. Piovan, B. Valecillos, S. Ganeshan, J. Murugesan, Andrea Cavallini, Ganeshan, S., Murugesan, J., Cavallini, A., Negri, F., Valecillos, B., and Piovan, U.

Subjects
Engineering, manufacturing defect, 020209 energy, 02 engineering and technology, Asset (computer security), 01 natural sciences, chemistry.chemical_compound, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Electrical and Electronic Engineering, Average cost, 010302 applied physics, Flammable liquid, creeping discharge, business.industry, Electronic, Optical and Magnetic Material, Condition-based maintenance, oil-immersed transformer, Electrical engineering, High voltage, Electronic, Optical and Magnetic Materials, Reliability engineering, partial discharge, chemistry, Partial discharge, partial dischargeidentification, business, Failure mode and effects analysis, condition-based maintenance, Degradation (telecommunications)
Abstract

High voltage power transformers are the most challenging equipment for asset managers in that their failures are often due to thermal, electrical, ambient, and mechanical stresses that interact in a synergic way. An accurate failure mode analysis is often prevented by the compound nature of the insulation (partly solid, partly liquid, self-regenerative, and highly flammable) and by the high probability that failures involve explosions. Insulation failure is, by far, the costlier event with an average cost of about $150,000 (1999) per outage [1]. Therefore, it is worthwhile to understand better the symptoms that indicate an imminent failure.

Published
2017
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