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This study presents experimental results on the application of dissolved gas-in-oil analysis (DGA) technique to a soy seed-based oil and mineral oil. The investigations covered three common types of transformer faults: partial discharge, arcing and overheating. Experiments were performed on laboratory models of transformer windings immersed with the test oils at three different moisture levels (low,...
In this paper, partial discharge (PD) signals in the ultra-high frequency (UHF) range were investigated. A spectrum analyzer functioning in the zero span mode was applied to capture and record the PD signal component at a specific frequency over a time interval. Different PD sources produce different PD patterns, thus it is possible to recognize the PD sources from the captured PD patterns. Here,...
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