Evaluation and Comparison of Some Common Methods for Waveform Distortion Analysis

J. Yao*, P. Judge, S. Z. Djokic

*Corresponding author for this work

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

Abstract / Description of output

This paper evaluates and compares commonly used methods for analysis of waveform distortions in power supply systems, including one new wavelet-based method. The evaluation is performed using a set of selected test waveforms (TWs) that have known waveform distortion characteristics, representing various types of deviations from an ideal sinusoidal waveform with a constant magnitude and frequency. The presented analysis uses both stationary and nonstationary TWs, featuring low and high frequency harmonics, interharmonics and subharmonics, as well as the frequency and magnitude variations of the fundamental and nonfundamental (including dc) components. The capabilities of the considered methods to correctly identify and accurately quantify specific waveform distortion features are evaluated by three general types of error metrics: a) statistical error indices, b) energy-based quantities, and c) waveform-related indicators. The combining of these metrics allows for a more detailed comparison of the original time-domain TWs with the waveforms reconstructed by the different methods. The presented results are part of the efforts to formulate a general methodology for a physically relevant evaluation of accuracy of different methods and specification of standardised test waveforms for a direct and comprehensive comparison and benchmarking of different methods.

Original languageEnglish
Title of host publication2022 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages143-148
Number of pages6
ISBN (Electronic)9781665484596
DOIs
Publication statusPublished - 2 Aug 2022
Event2022 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2022 - Sorrento, Italy
Duration: 22 Jun 202224 Jun 2022

Conference

Conference2022 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2022
Country/TerritoryItaly
CitySorrento
Period22/06/2224/06/22

Keywords / Materials (for Non-textual outputs)

  • ESPRIT method
  • Fourier transform
  • instantaneous reactive power theory
  • power quality
  • test waveform
  • waveform distortion
  • wavelet transform

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