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Fault diagnosis of actual large-power high-voltage windings using transfer function method

Rahimpour E., Tenbohlen S.

Archives of Electrical Engineering

2011

Vol. 60, nr 3

269-281

The transfer function (TF) method is presently a well-known method used to detect various types of winding damage in power transformers. Although abundant research has been done on this subject using laboratory windings as test objects, it is hard to find one, whose test objects are actual large-power transformer windings. Hence, a 400 kV disc winding consisting of 86 discs is used in this paper to study turn-to-turn short circuit with the help of the TF method. To evaluate the effects of this type of fault on TF curves, some mathematical comparison algorithms are used in this research.