An Improved Harmonic Detection Algorithm Combined with Blackman Window Bispectral Interpolation and Time Shift Phase Difference Method

In order to improve the analysis accuracy, anti-interference and stability of the harmonic detection algorithm, an improved harmonic detection algorithm with Blackman window bispectral interpolation combined with full-phase time-shift phase difference method is proposed. Based on the analysis of the principles of the Blackman window bispectral interpolation method and the full-phase time-shift phase difference method, the harmonic detection algorithm is combined and optimized. And the frequency measurement accuracy is improved, and the measurement stability in the case of harmonic frequency fluctuation and noise interference is verified. The results show that the algorithm has high measurement accuracy and good performance, and has high application value.