DEVELOPMENT OF THE METHOD OF DISCRETE WAVELET TRANSFORM FOR POWER TRANSFORMERS INTERNAL FAULT IDENTIFICATION

カテゴリ: 全国大会

論文No: 640-641

グループ名: 【全国大会】平成31年電気学会全国大会論文集

発行日: 2019/03/01

タイトル(英語): DEVELOPMENT OF THE METHOD OF DISCRETE WAVELET TRANSFORM FOR POWER TRANSFORMERS INTERNAL FAULT IDENTIFICATION

著者名: Eduardo Magaia(Yokohama National University),Tsutomu Oyama(Yokohama National University)

著者名(英語): Eduardo Magaia,Tsutomu Oyama

要約(日本語): The percentage differential relay with harmonic restraint has been used to detect the internal faults in the transformer. However, certain mal-functioning of differential relay has been reported which leads for unnecessary tripping of differential relay. This unnecessary tripping can lead to a power blackout and deterioration of the services provided by the Utility. So, there is a need for the development of improved classifier technique. This paper aims to present a methodology for identification of faults in power transformers, by distinguishing internal faults from other conditions, as energization of the transformer, external faults and saturation of the current transformer. The methodology is based on Discrete Wavelet Transform, since this gives good information about frequency and time domain simultaneously.

本誌掲載ページ: 6-362 p

原稿種別: 英語