Online measurement method of phase difference of current sensor based on CCA
Ke Wang, Guoliang Gong, Gang Chen, Xiao Yi, Huaxiang Lu · 2017
In this paper, a precise online phase difference measurement method base on canonical correlation analysis (CCA) is proposed. By modeling the output, the current sensor's phase difference can be measured precisely and quickly. And the result is very robust to frequency shift and harmonic. Under the condition that the signal-noise rate is 20dB, and the harmonic amplitude ratio is 10%, phase measurement algorithm proposed in this paper has an average absolute error of 0.0214°, which is much better than ICA based algorithms on both running time and calculation accuracy. And Considering the calculation amount, it's easy to implement this algorithm on hardware.