فهرست نشریات علمی دسترسی آزاد ایران

This paper demonstrates a novel approach for the dierential protection of power transformers. This method uses the Wavelet Transform (WT) and the Adaptive Network-based Fuzzy Inference System (ANFIS) to detect a fault current from an inrush current. The proposed method has been designed, based on the dierences between the amplitudes of wavelet transform coecients in a special band of frequency that is caused by faults and inrush currents. The performance of this algorithm has been simulated and tested under dierent conditions of the switching on of power transformers, using the PSCAD/EMTDC environment software.