2026-10-30T03:26:33Zhttps://munzur-rdlopen.rawdatalibrary.net/oai/request

oai:munzur-rdlopen.rawdatalibrary.net:munzur/32322026-10-28T15:39:29Zopenairecom_munzur_1col_munzur_2com_munzur_8col_munzur_154

Approximate-derivative-based signalprocessing method to segment power-quality disturbancesAkmaz, Düzgünsignal denoisingfiltering theorypower supply qualitydiscrete wavelet transformsimage denoisingwavelet transformsapproximate-derivative-based signal-processing methodsegment power-quality disturbancespower systemspower quality datadifferent signal-processing toolssimple signal-processing toolsapproximate-derivative signal-processing toolsimple mathematical processing approachPQ disturbancesnoise-free signalsnoisy signalsdenoising methodAD methodsingle-level discrete waveletPQ signalsanalysing signalThe increasing complexity of power systems and the increase in power quality (PQ) data have made it necessary to develop different and simple signal-processing tools. In this study, an approximate-derivative (AD) signal-processing tool based on a simple mathematical processing approach was developed for the segmentation of PQ disturbances. Although the developed method was highly effective for the segmentation of noise-free signals, the method was unable to properly handle the segmentation of noisy signals. Thus, to mitigate this situation, a denoising method based on the Sqtwolog threshold was applied to the noisy signals. After denoising, the proposed AD method effectively performed the segmentation. Subsequently, AD and a single-level discrete wavelet transform (DWT) with Daubechies 4 mother wavelets were compared through simulations, which showed that successful results can be obtained using the proposed method. Furthermore, all simulations showed that the application of AD and single-level DWT to PQ signals under different conditions resulted in similar patterns with different amplitudes. Therefore, this study provides a different approach for analysing signal using single-level DWT.Institution of Engineering and Technology2020Articlehttps://rdlopen.rawdatalibrary.net/r/munzur/3232https://doi.org/10.1049/iet-gtd.2020.03721751-8687enIET Generation, Transmission and Distributioninfo:eu-repo/semantics/closedAccessinfo:eu-repo/semantics/articlehttps://munzur-rdlopen.rawdatalibrary.net/tr/items/munzur/3232