Power quality indices for aperiodic voltages and currents

Sergio Herraiz Jaramillo, G. T. Heydt, Efraín O'Neill-Carrillo

Research output: Contribution to journalArticlepeer-review

78 Scopus citations


This paper addresses the subject of transient electric power quality problems. The quantification of power quality in terms of simple indices such as total harmonic distortion and other measures is revisited in terms of the windowed Fourier transform. This transform is a short term Fourier transform evaluated over a time window. The result is a set of new power quality indices which collapse to the familiar forms for the cases of periodic steady state, but which capture transient amplitudes for nonsteady state applications. Applications are suggested.

Original languageEnglish (US)
Pages (from-to)784-790
Number of pages7
JournalIEEE Transactions on Power Delivery
Issue number2
StatePublished - Apr 2000

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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