Research of the Phase Measurement Method and Its VI Realization

摘要

a few of the phase measurement methods and their VI realization are demonstrated. The zero crossing method is simple; The correlation analysis method has the advantage of anti-jamming; The speedy phase measurement method is used in the quick phase detection. Its detection time is not more than one-fourth of a cycle; The distortion of the power network voltage and current is removed in the waveform transform method. The phase difference measurement method based on (VI) technology has the advantages of accuracy, speedy, anti-jamming, brief circuit and so on.