Applications of the windowed FFT to electric power quality assessment

G. T. Heydt, P. S. Fjeld, C. C. Liu, D. Pierce, L. Tu, G. Hensley

Research output: Contribution to journalArticlepeer-review

281 Scopus citations


This paper discusses the application of the windowed fast Fourier transform to electric power quality assessment. The windowed FFT is a time windowed version of the discrete time Fourier transform. The window width may be adjusted and shifted to scan through large volumes of power quality data. Narrow window widths are used for detailed analyses, and wide window widths are used to move rapidly across archived power quality data measurements. The mathematics of the method are discussed and applications are illustrated.

Original languageEnglish (US)
Pages (from-to)1411-1416
Number of pages6
JournalIEEE Transactions on Power Delivery
Issue number4
StatePublished - Oct 1999

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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