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High-impedance fault detection in distribution networks with use of wavelet-based algorithm

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5 Author(s)
Michalik, M. ; Fac. of Electr. Eng., Tech. Univ. Wroclaw ; Rebizant, W. ; Lukowicz, M. ; Seung-Jae Lee
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A new simple and effective algorithm of arcing fault detection in distribution networks with the application of a wavelet transform technique is presented in this paper. The protection algorithm developed observes the phase displacement between wavelet coefficients calculated for zero-sequence voltage and current signals at a chosen high-level frequency. The final decision in regards to feeder switching off (or alarm issuing) is met either with a deterministic logic scheme or with the use of a neural net trained especially for that purpose. The developed wavelet-based high-impedance fault (HIF) detector has been tested with Electromagnetic Transients Program-Alternative Transients Program (ATP)-generated signals, exhibiting better performance than traditionally used algorithms and methods. The protection method proposed may be used for HIF detection independent of the network neutral-point grounding mode. The scheme proved to be robust against transients generated during normal events such as feeder energizing and de-energizing as well as capacitor bank switching

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Power Delivery, IEEE Transactions on  (Volume:21 ,  Issue: 4 )