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Volume 29 Issue 4
Jul.  2016
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Journal of Southwest Jiaotong University  > 2016  >  29(4): 736-742.
LIANG Jianying, LIU Zhiming. Algorithm for Eliminating Interactions Between Fundamental Wave and Harmonics in Phasor Estimation[J]. Journal of Southwest Jiaotong University, 2016, 29(4): 736-742. doi: 10.3969/j.issn.0258-2724.2016.04.019
Citation: LIANG Jianying, LIU Zhiming. Algorithm for Eliminating Interactions Between Fundamental Wave and Harmonics in Phasor Estimation[J]. Journal of Southwest Jiaotong University, 2016, 29(4): 736-742. doi: 10.3969/j.issn.0258-2724.2016.04.019
shu

Algorithm for Eliminating Interactions Between Fundamental Wave and Harmonics in Phasor Estimation

doi: 10.3969/j.issn.0258-2724.2016.04.019
  • Received Date: 02 Sep 2015
  • Publish Date: 25 Aug 2016
    Abstract
  • The fundamental and harmonic component of signal would interact between each other, leading to the measurement deviation. Thus, an algorithm was proposed, which is able to simultaneously measure both fundamental and harmonic waves and eliminate their interactions. First, the Taylor model was used to express the time-varying model of signal containing harmonic component. Several phasor estimations for different frequencies in one data window were obtained using the frequency-domain information; Then these phasor estimations were used to estimate the model parameters denoting time-variation and harmonic component. Tests on ideal signals and electric motor units trial data were conducted, and the results show that, at the cost of increasing about 5.4% of computational cost, the proposed algorithm can effectively eliminate the interactions between fundamental and harmonic components of signal, and the maximum measurement error and variance of the fundamental and harmonics measurement were decreased by 21.3% and 2.7%, respectively.

     

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