High-precision harmonic parameter estimation method based on composite iterative algorithm
An iterative algorithm, high-precision technology, applied in the field of power grid signal harmonic analysis, can solve the problem of low accuracy, and achieve the effect of improving the estimation accuracy
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[0029] The present invention utilizes the three-peak interpolation to have high precision for amplitude analysis, the phase difference correction algorithm has high precision for frequency analysis, and the spectrum leakage cancellation method has the characteristics of good precision for phase analysis. The three-peak interpolation algorithm and phase difference correction Combining the algorithm with the spectral leakage cancellation algorithm, a compound iterative harmonic analysis algorithm is proposed. Use the superior performance of three-peak interpolation to calculate the amplitude directly, calculate the phase at the same time, and pass the phase result to the phase difference correction algorithm, use the phase difference correction algorithm to analyze and obtain the frequency correction amount, and then compare it with the spectral leakage cancellation algorithm Combined to obtain the phase value calculated for the first iteration. In this way, the phase difference...
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