Detection and localization of inter-turn fault in the HV winding of a power transformer using wavelets [Comments and authors´ reply]

Author

Gururaj, B.I. ; Satish, L.

Volume

9

Issue

3

fYear

2002

fDate

6/1/2002 12:00:00 AM

Firstpage

479

Lastpage

480

Abstract

We discuss the paper by M.R. Rao and B.P. Singh (ibid. vol. 8, pp. 652-567, 2001) describing a wavelet approach for identification and localization of "minor" or "small" faults within HV transformer windings during lightning impulse tests on them. Although the authors\´ claim appear to be impressive, there are serious questions regarding the circuit models and computational procedures used, as well as, in the interpretation of the results obtained from the wavelet method. Therefore, the following is intended to obtain clarification from the authors and to help the reader with the usage of wavelets in addressing such problems

Keywords

fault diagnosis; impulse testing; power transformer testing; transformer windings; waveform analysis; wavelet transforms; HV winding; fault localization; inter-turn fault detection; lightning impulse tests; neutral current analysis; power transformer; wavelet approach; Circuit faults; Circuit simulation; Circuit testing; Computational modeling; Fault detection; Fault diagnosis; Frequency; Impulse testing; Power transformers; Windings;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2002.1007712

Filename

1007712