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DU Tian-jun, CHEN Guang-ju. Power System Harmonic Detection Using Frequency-Domain Interpolation Wavelet Transform[J]. Journal of Electronic Science and Technology, 2005, 3(3): 245-248.
Citation: DU Tian-jun, CHEN Guang-ju. Power System Harmonic Detection Using Frequency-Domain Interpolation Wavelet Transform[J]. Journal of Electronic Science and Technology, 2005, 3(3): 245-248.
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Power System Harmonic Detection Using Frequency-Domain Interpolation Wavelet Transform

  • School of Automation Engineering,University of Electronic Science and Technology of China Chengdu 61005 China

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  • Author Bio:

    DU Tian-jun interests include power system automation, modern test theory and technology, dtj2000@163.com.

  • Received Date: 2004-10-21
  • Publish Date: 2005-09-24
    Abstract
  • Aiming at harmonic detection, fast Fourier transform can only detect integer harmonics precisely, short time Fourier transform can detect non-integer harmonics with low resolution, and some former wavelet based methods have no aliasing-reduction scheme which result in low measurement precision and poor robustness. A frequency-domain interpolation algorithm to detect harmonics is proposed by choosing Shannon wavelet. Shannon wavelet is an orthogonal wavelet possessing best ideal frequency domain localization ability, it can restrict wavelet aliasing but bring about Gibbs oscillation phenomenon simultaneously. An interpolation algorithm is developed to overcome this problem. Simulation reveals that the proposed method can effectively cancel aliasing, spectral leakage and Gibbs phenomenon, so it provides an effective means for power system harmonic analysis.
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