caa a22 4500 463206304 CHVBK 20180405153127.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s00202-007-0058-2 doi (NATIONALLICENCE)springer-10.1007/s00202-007-0058-2 Pattern classification of internal incipient faults during impulse tests using continuous wavelet analysis [Elektronische Daten] [M. Naderi, G. Gharehpetian, T. Blackburn, M. Abedi] In the case of a fault occurrence, the pattern of the fault currents obtained by the standard impulse tests contains a typical signature of the nature and the location of the insulation failure involved. This paper presents a new approach to classify the pattern of the arc discharge location as one of the important types of internal incipient faults in transformer windings. The continuous wavelet transform (CWT) has been used to calculate the most predominant frequency of each fault and its time of occurrence. The data obtained from the field tests of a 66kV/25MVA interleaved transformer winding and the computer simulations have been used for the classification. Springer-Verlag, 2007 Arc discharge nationallicence Power transformers nationallicence Windings internal incipient faults nationallicence Pattern classification nationallicence Wavelet transform nationallicence Impulse voltage nationallicence Naderi M. Electrical Engineering Department, Amirkabir University of Technology, No. 424 Hafez Ave, 15914, Tehran, Iran aut Gharehpetian G. Electrical Engineering Department, Amirkabir University of Technology, No. 424 Hafez Ave, 15914, Tehran, Iran aut Blackburn T. School of Electrical Engineering, University of New South Wales, 2052, Sydney, NSW, Australia aut Abedi M. Electrical Engineering Department, Amirkabir University of Technology, No. 424 Hafez Ave, 15914, Tehran, Iran aut Electrical Engineering Springer-Verlag 90/2(2007-12-01), 79-85 0948-7921 90:2<79 2007 90 202 https://doi.org/10.1007/s00202-007-0058-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00202-007-0058-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Naderi M. Electrical Engineering Department, Amirkabir University of Technology, No. 424 Hafez Ave, 15914, Tehran, Iran aut NATIONALLICENCE 700 1- Gharehpetian G. Electrical Engineering Department, Amirkabir University of Technology, No. 424 Hafez Ave, 15914, Tehran, Iran aut NATIONALLICENCE 700 1- Blackburn T. School of Electrical Engineering, University of New South Wales, 2052, Sydney, NSW, Australia aut NATIONALLICENCE 700 1- Abedi M. Electrical Engineering Department, Amirkabir University of Technology, No. 424 Hafez Ave, 15914, Tehran, Iran aut NATIONALLICENCE 773 0- Electrical Engineering Springer-Verlag 90/2(2007-12-01), 79-85 0948-7921 90:2<79 2007 90 202 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer