Abstract

The first part of the paper deals with the base information about the measurement of high-voltage transformers. The second part of paper deals with the use of the method of frequency domain spectroscopy (FDS) for transformers. This method is used in analysis insulating condition of power transformer with a system of oil-paper. It was found, that the operating temperature highly impacts the results of these tests during the experimental measurement. Moisture and conductivity between insulating paper and oil in an insulating system are highly dependent on temperature. In the other part, the paper presents experimental results of the diagnostic measurement for a real traction transformer at different operating temperatures and states - with oil and without.

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