文件名称:wavelet

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  • 2008-10-13
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A new cable fault location method based on

wavelet reconstruction is proposed. In this method the

difference between the currents of faulty phase and sound

phase under the high voltage pulse excitation is used as the

measured signal and is decomposed in multi-scale by wavelet

transform, then reconstructed in single scale. Comparing with

traditional fault location method by travelling wave, the

presented method will not be interfered by the reflected wave

from the branch joint of cables or from other positions where

the impedances are not matched and not be influenced by fault

types, otherwise, the reflected waves can be recognized even

the faulty position is near to the measuring terminal, at the

same time, the influence of the wave speed uncertainty can be

reduced. The correctness of the proposed method is proved by

simulation results.


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