The harmonious detecting and analyzing of PV grid connected generation

The method of harmonious detecting is introduced about PV grid connected generation, and the technique is realized to harmonious synchronous sampling based on PLL circuit of hardware, in order that the error is eliminated for non-synchronous sampling at all. It is used to analyze the harmonic of PV system for FFT algorithm based on B-H window function and interpolation, and the error is minished by frequency table giveaway and barrier domino offect effectively, veracity of data processing is advanced.