Original scientific paper

Effective bushing diagnosis using partial discharge testing

Laurentiu Viorel Badicu ; OMICRON Energy Solutions GmbH
Wojciech Koltunowicz ; OMICRON Energy Solutions GmbH
Jan Subocz ; West Pomeranian University of Technology

Abstract

This article demonstrates how the inclusion of partial discharge as a measurement parameter ensures a more reliable diagnosis of insulation condition in transformer bushings. Comparative diagnostic tests showed that the partial discharge measurements best enabled the detection of bushing defects, which the other methods were not able to detect alone. The tests were performed in the lab on oil-impregnated paper (110 kV – with induced defects) and resin-bonded paper (52 kV – with design flaws) bushings. The bushings were subjected to long-term AC tests during which the capacitance, dissipation factor and partial discharge levels were continuously measured. A correlation between the measured parameters and the bushing condition was performed to reach a best-practice conclusion.

Keywords

bushing; insulation system; partial discharge measurement

Hrčak ID:

194840

URI

https://hrcak.srce.hr/194840

Publication date:

8.10.2017.

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