alexa TRANSFORMER FAULT DETECTION USING DWT-DCT
ISSN ONLINE(2319-8753)PRINT(2347-6710)

International Journal of Innovative Research in Science, Engineering and Technology
Open Access

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Research Article

TRANSFORMER FAULT DETECTION USING DWT-DCT

Rajni Gupta1, Mr. Rinku Kumar2
  1. M.Tech student, Department of Electrical Engineering, DIET College, Karnal, Haryana
  2. Assistant Professor, Department of Electrical Engineering, DIET College, Karnal, Haryana
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Abstract

Wavelet transform can be applied with the Fourier transform to analyse a signal. This transform gives the signal characteristics in time or in frequency domain. But they don‟t give the combination of both. Wavelet Transform splits the signal energy in time-frequency domain. In this paper, In this a new approach was presented in order to recognize and distinguish fault signal from inrush current. With this kind of analysis, these two currents can be separated simply since the distribution of energy in time and frequency domain for inrush and fault currents is very different. The results shows that DCT –DWT splits differential current into small wavelets. This is done by filters in DWT. Various wavelet filters has been tried for all types of faults. It has been concluded that db6 wavelet shows best result for fault detection.

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