Volume 36 Issue 4
Apr.  2010
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Wu Jing, Jin Haibin. Spectral interpolation measurement algorithm of high accuracy on signals in power network[J]. Journal of Beijing University of Aeronautics and Astronautics, 2010, 36(4): 495-499. (in Chinese)
Citation: Wu Jing, Jin Haibin. Spectral interpolation measurement algorithm of high accuracy on signals in power network[J]. Journal of Beijing University of Aeronautics and Astronautics, 2010, 36(4): 495-499. (in Chinese)

Spectral interpolation measurement algorithm of high accuracy on signals in power network

  • Received Date: 02 Jul 2009
  • Publish Date: 30 Apr 2010
  • In the condition of asynchronous sampling, the long-range spectral leakages, short-range spectral leakages and negative frequency spectral leakages will be caused by using Fourier transforms to analyze the harmonics in power network. To improve the measurement accuracy, the spectrum leakage error expressions were derived. For power frequency alternating current signals, a new error correction algorithm based on interpolation was presented to eliminate both of the short-range spectral leakage errors and the negative frequency spectral leakage errors at the same time. Compared with the previous interpolation algorithms, the simulations and practical measurements show the new algorithm need not weight the samples by special windows and can measure out the accurate frequency, amplitude and phase of the signals even if the asynchronous sampling is very serious. It is applicable for the precise measurement fields requiring a higher accuracy.

     

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