Application of wavelet transform in travelling wave protection |
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Authors: | J Liang S Elangovan J B X Devotta |
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Affiliation: | Department of Electrical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore, Singapore 119260 |
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Abstract: | In this paper, the correlation function-based travelling wave protection algorithm is analysed from the viewpoint of wavelet transform (WT), and a wavelet correlation function (WCF) algorithm is proposed to replace it. In the new algorithm, the multi-scale spline WT is used to detect the edges of the travelling wave signal, and the WCF is then employed to fulfil the correlation operation in the WT domain instead of the time domain. This enhances the peak intensity and the noise rejection ability of the algorithm. The performance of this algorithm is illustrated by simulation results. |
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Keywords: | Travelling wave protection Wavelet transform Wavelet correlation function Wavelet matched filter |
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