Harmonic power calculating method for electric energy measuring
A technology of harmonic power and calculation method, which is applied in the direction of electric power measurement by applying digital technology, can solve the problems of inaccurate acquisition, large calculation amount, large error, etc., and achieves the effect of reduced calculation amount, high precision and easy realization.
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[0024] The present invention will be further described below in conjunction with accompanying drawing.
[0025] DFT operation (butterfly operation) calculation formula: X ( k ) = Σ n = 0 N - 1 x ( n ) W N nk , k , n = 0,1 , . . . , N - 1 , in:
[0026] N is a positive integer, X(k) represents the kth value of the DFT operation result, Represents the twiddle factor, j represents the imaginary unit (j 2 =-1), e represents the natural exponent (e≈2.7182818, infinite non-recurring decimals);
[0027] The FFT calcula...
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