Comparison of effectiveness of various mother wavelet functions in the detection of actual 3-phase voltage sags

Mohamed Fuad Faisal, Azah Mohamed

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Conventional methods for analyzing power quality disturbances are primarily based on visual inspection of the rms value and Fourier Transform (FT) of the voltage and current waveforms that were recorded by power quality recorders. By analyzing these waveforms power utilities' engineers can evaluate the condition of the network and identify any potential degrading trends in the electrical system. However, to perform manual analyses on all the voltage events recorded in the networks is time consuming. There are also questions posed on the accuracy of the rms and FT in the detection of non-stationary waveforms. To overcome these two deficiencies, an automated technique comprising of signal processing and artificial intelligence techniques is proposed. Signal processing techniques such as Short Time Fourier transform (STFT), S-transform and wavelet transform (WT) are widely used for analyzing voltage events. In the WT approach, the original signal is multiplied with a function known as the mother wavelet. There are many mother wavelet functions to be selected for generating the daughter wavelets and it is important to determine the best mother wavelet function for accurate detection of power quality disturbances. In this paper, evaluations were performed to evaluate the effectiveness of five mother wavelet functions in the detection of voltage sags. The results of the evaluations are presented in this paper.

Original languageEnglish
Title of host publicationIET Conference Publications
Edition550 CP
DOIs
Publication statusPublished - 2009
Event20th International Conference and Exhibition on Electricity Distribution, CIRED 2009 - Prague
Duration: 8 Jun 200911 Jun 2009

Other

Other20th International Conference and Exhibition on Electricity Distribution, CIRED 2009
CityPrague
Period8/6/0911/6/09

Fingerprint

Power quality
Fourier transforms
Electric potential
Wavelet transforms
Signal processing
Artificial intelligence
Inspection
Mathematical transformations
Engineers

Keywords

  • Continuous wavelet transform
  • Power quality detection

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Comparison of effectiveness of various mother wavelet functions in the detection of actual 3-phase voltage sags. / Faisal, Mohamed Fuad; Mohamed, Azah.

IET Conference Publications. 550 CP. ed. 2009.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Faisal, MF & Mohamed, A 2009, Comparison of effectiveness of various mother wavelet functions in the detection of actual 3-phase voltage sags. in IET Conference Publications. 550 CP edn, 20th International Conference and Exhibition on Electricity Distribution, CIRED 2009, Prague, 8/6/09. https://doi.org/10.1049/cp.2009.0530
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