Transformers Magazine, Vol. 4 No. 5, 2017.
Izvorni znanstveni članak
Diagnostics of HV bushings through oil sampling and analysis: Experience with GSU transformers
Riccardo Actis
Riccardo Maina
Vander Tumiatti
Sažetak
Bushings are highly stressed parts of power transformers and their failures can lead to a transformer break-down. The diagnostics and predictive surveillance of bushings is essential for uninterrupted operation of transformers. Diagnostic tools applied include electrical tests, thermography and, to a minor extent, oil anal-ysis for oil-impregnated bushings. This paper gives a short review of bushing types and related applications, including procedures for in-field inspection and oil sampling. Dissolved Gas Analysis (DGA) issues in bush-ings’ mineral oil are briefly discussed and diagnostic criteria for DGA interpretation are given, comparing the experience of the authors with the available literature and standards.
Ključne riječi
mineral oil; SF6; bushings; transformer; DGA; diagnosis
Hrčak ID:
202529
URI
Datum izdavanja:
23.11.2017.
Posjeta: 1.909 *