Abstract
In this paper, a sensitive and accurate technique in detecting minor internal fault of transformer winding is used. Frequency response analysis, as a well-known and sensitive method of fault detection, is coupled with finite element analysis, which is one of the most accurate methods of simulation. A sensitive transfer function has been noticed in a three-phase power transformer. The response is analysed in the frequency domain in healthy state and also some classified faulty states. Simulation results are compared in these states for better and faster identification of minor faults. In order to enhance accuracy, double 2D simulation, instead of 2D simulation, is used. Both magnetic and electric analyses are applied simultaneously as a new contribution of this study.
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