An Application of Wavelet Transform to Power Transformer Protection

전력용 변압기 보호를 위한 Wavelet변환의 적용

This paper describes an application of discrete wavelet transform for power transformer protection. It is shown that the moving wavelet coefficients method based feature extraction for discrimination between actual internal faults and energizing state. The simulations of power transformer have been carried out using EMTP. The proposed method is more effectively and simpler to distinguish internal faults from inrush currents.