Abstract
In this paper, a different internal fault modeling of transformer based on the physical information of the transformer (equivalent circuit parameter) using transmission line method (TLM) and an identification algorithm method FIS based on PCA in Matlab are presented. A transformer is been modeled considering non-linearities as hysteresis and saturation and an internal fault short circuit is introduced into the model as internal fault portion. Then, the transformer internal fault currents are discriminated from the rated currents and the degree and priority of transformer internal faults are obtained by the proposed method. In addition, the proposed algorithm is compared with the real-time fault of transformer.
