Wavelet Transform Applyied to Identifying the Inrush
LIAO Tai chang 1,2 ; WANG Hui 1 (1.College of Electr. Information Eng.,Hunan Univ.,Changsha 410082,China; 2.Dept.of phys.& Information Eng.,Changsha Univ. of Electr.Power,Changsha 410077,China)
A new scheme is proposed paper to distinguish inrush and internal fault occrred in the transformer.This scheme is based on filtet and the wavelut transform.The feature of the inrush and fault current is extracted from the local maxima of the wavelet fransforms and described clearly.The results of the digital simulation show that the method can identify fault current and inrush current.