Transformers Magazine, Vol. 9 No. 4, 2022.
Original scientific paper
Condition assessment of transformer insulation during routine partial discharge (PD) tests and in-service monitoring
Bogdan Gorgan
Wojciech Koltunowicz
Patrick Zander
Abstract
To compare the results of in-service PD measurements with the results of conventional measurements previously performed during transformer routine testing in the factory, the use of alternative PD methods in the factory is proposed. The effective comparison of PD data results is possible with a measuring system with advanced hardware and software features. The minimum requirements of such a versatile PD measurement system are presented, and an example of the comparative measurements with conventional and alternative methods performed on a 1.6 MVA, 20 kV distribution transformer during routine testing is shown.
Also, the advantages of having continuous online PD monitoring systems installed on 500 MVA power transformers and 220 kV power cable lines are presented. The PD defect identification and its accurate localization made it possible to avoid a serious service failure.
Keywords
Hrčak ID:
285178
URI
Publication date:
12.10.2022.
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