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PLL Based Digital Adaptive Filter for Detecting Interharmonics

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  • Ayhan Özdemir
  • Mehmet Taştan

Abstract

Studies on the PLL (phase locked loop) based interharmonic measurements have been considerably increased recently. The method proposed in this study is a hybrid method based on the frequency analysis. The proposed method presents solutions for the leading problems about the interharmonic measurement, such as fundamental frequency shifting, spectral leakage, and picket-fence effect, using digital PLL and adaptive notch filter. In addition, a new approach is presented to solve the multizero crossing problem encountered in the analysis of the harmonic-interharmonic. Both simulative and field data tests have been performed to verify the effectiveness of the proposed method.

Suggested Citation

  • Ayhan Özdemir & Mehmet Taştan, 2014. "PLL Based Digital Adaptive Filter for Detecting Interharmonics," Mathematical Problems in Engineering, Hindawi, vol. 2014, pages 1-10, June.
    • Handle: RePEc:hin:jnlmpe:501781
    DOI: 10.1155/2014/501781
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