Measuring harmonics by an improved FFT-based algorithm with considering frequency variations

Gary W. Chang, Cheng Yi Chen, Meng Chi Wu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

8 Scopus citations

Abstract

Fast Fourier Transform (FFT) is widely used for the signal processing because of its computational efficiency. Most power quality meters and digital relays adopt FFT-based algorithm to characterize harmonics of the measured signals. A typical FFT-based algorithm may lead to inaccurate results, if the system frequency varies. This paper proposes an improved FFT-based algorithm for measuring harmonics. The performance of the proposed algorithm is then validated by testing the simulated and actual measured signals. Results are compared with those obtained by the conventional FFT algorithm and by a power quality meter. It shows that the proposed algorithm is computational efficient and the solution accuracy is maintained.

Original languageEnglish
Title of host publicationISCAS 2006
Subtitle of host publication2006 IEEE International Symposium on Circuits and Systems, Proceedings
Pages1203-1206
Number of pages4
StatePublished - 2006
EventISCAS 2006: 2006 IEEE International Symposium on Circuits and Systems - Kos, Greece
Duration: 21 May 200624 May 2006

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
ISSN (Print)0271-4310

Conference

ConferenceISCAS 2006: 2006 IEEE International Symposium on Circuits and Systems
Country/TerritoryGreece
CityKos
Period21/05/0624/05/06

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