A New Methodology of Harmonic Detection Based on Windowed FFT and Wavelet Transform

Xu Zheng; Shuo Wang; You Bing Zhang

doi:10.4028/www.scientific.net/AMR.732-733.634

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 732-733A New Methodology of Harmonic Detection Based on...

A New Methodology of Harmonic Detection Based on Windowed FFT and Wavelet Transform

Abstract:

Traditional FFT show good trait in steady-state harmonic testing, while it turn low accuracy when testing harmonic with voltage sag or transient, and can not illustrates the information on amplitude-time plane. The discrete wavelet transform is suitable for transient harmonic signals. However it is not intuitive and has more computing than FFT. Since both steady-state and transient components exist in power system, a new method of harmonic analysis algorithm based on Kaiser windowed FFT combing with Daubechies wavelet transform is proposed. The simulation results demonstrate this method possesses high accuracy and flexibility in harmonic detection.

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Periodical:

Advanced Materials Research (Volumes 732-733)

Pages:

634-638

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.732-733.634

Citation:

Cite this paper

Online since:

August 2013

Authors:

Xu Zheng*, Shuo Wang, You Bing Zhang

Keywords:

FFT, Harmonic Detection, Kaiser Window, Transient, Wavelet Transform (WT)

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* - Corresponding Author

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