In the conventional phasor measuring method based on DFT(discreteFourier transform),no overall consideration is given to the phase angle error. Thus,the frequency calculation and phasorestimation results are not sufficiently accurate.

• 传统的基于离散傅里叶变换(DFT)的频率跟踪算法对相角误差的考虑不全面，从而其频率、相角、幅值等计算结果也不够准确。