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 Fault Identification algorithm method using FIS based on PCA in Matlab is presented. A pilot transformer is modeled by considering the non-linearities as hysteresis and saturation and an internal fault short circuit as internal fault portion is introduced into the model. 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 techniques. Results were compared to real time measurement to investigate the accuracy of the proposed method.
