Ming-yu Yang, Wan-Ye Yao, Zengping Wang, Ju Zhang, Yanjun Jiao
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A new ultra high-speed protection scheme based on wavelet analysis
A new ultra high-speed protection scheme is proposed in this paper. Using wavelet transform with multiresolution analysis, the current signals is decomposed into a series of detailed wavelet components. The spectral energies of the wavelet components are calculated and then employed to detect the faults. Characteristics of the proposed ultra high-speed protection algorithm are analyzed and results of simulation studies are given. The results show that the proposed algorithm is promising and easy to implement for computer relaying application
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