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Type: Journal article
Title: Abrupt change detection in power system fault analysis using adaptive whitening filter and wavelet transform
Author: Ukil, A.
Zivanovic, R.
Citation: Electric Power Systems Research, 2006; 76(9-10):815-823
Publisher: Elsevier Science SA
Issue Date: 2006
ISSN: 0378-7796
Statement of
Abhisek Ukil and Rastko Živanović
Abstract: This paper describes the application of the adaptive whitening filter and the wavelet transform used to detect the abrupt changes in the signals recorded during disturbances in the electrical power network in South Africa. Main focus has been to estimate exactly the time-instants of the changes in the signal model parameters during the pre-fault condition and following events like initiation of fault, circuit-breaker opening, auto-reclosure of the circuit-breakers. The key idea is to decompose the fault signals, de-noised using the adaptive whitening filter, into effective detailed and smoothed version using the multiresolution signal decomposition technique based on discrete wavelet transform. Then we apply the threshold method on the decomposed signals to estimate the change time-instants, segmenting the fault signals into the event-specific sections for further signal processing and analysis. This paper presents application on the recorded signals in the power transmission network of South Africa. © 2005 Elsevier B.V. All rights reserved.
Keywords: Power system fault analysis
Abrupt change detection
Adaptive whitening filter
Wavelet transform
Description: Copyright © 2005 Elsevier B.V. All rights reserved.
DOI: 10.1016/j.epsr.2005.10.009
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Appears in Collections:Aurora harvest 6
Electrical and Electronic Engineering publications

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