Roscoe, Andrew J. and Carter, R. and Cruden, A. and Burt, Graeme M. (2011) Fast-responding measurements of power system harmonics using discrete and fast fourier transforms with low spectral leakage. In: Renewable power generation (RPG 2011). IEEE, New York, pp. 1-6.
C_2011_Roscoe_IET_RPG_DFT_vs_FFTpdf_PostPrint.pdf - Submitted Version
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Conventional wisdom dictates that a Fast Fourier Transform (FFT) will be a more computationally effective method for measuring multiple harmonics than a Discrete Fourier Transform (DFT) approach. However, in this paper it is shown that carefully coded discrete transforms which distribute their computational load over many frames can be made to produce results in shorter execution times than the FFT approach, even for large number of harmonic measurement frequencies. This is because the execution time of the presented DFT actually rises with N and not the classical N2 value, while the execution time of the FFT rises with Nlog2N.
|Item type:||Book Section|
|Keywords:||fast-responding, measurements, power system, harmonics, low spectral leakage, fast fourier, power system harmonics, power quality, harmonic analysis, fourier transforms, Electrical engineering. Electronics Nuclear engineering|
|Subjects:||Technology > Electrical engineering. Electronics Nuclear engineering|
|Department:||Faculty of Engineering > Electronic and Electrical Engineering|
|Depositing user:||Pure Administrator|
|Date Deposited:||09 May 2012 13:37|
|Last modified:||28 Apr 2016 04:45|