对传统的傅立叶滤波器与一种新型的单瓣滤波器进行了比较研究。与傅立叶滤波器相比 ,单瓣滤波器具有无旁瓣 ,且数据窗不必限制为一个基频周期的整数倍的特点 ,当窗长大于或等于基频周期的两倍时 ,其滤波精度高于傅氏滤波器 ,该滤波器适用于高精度的电气测量和故障定位 The traditional Fourier filter and a new type of single-lobe filter were compared. Compared with the Fourier filter, the single-lobe filter has no side lobe, and the data window does not have to be limited to an integral multiple of a fundamental frequency period. When the window length is greater than or equal to twice the fundamental frequency period, the filtering precision is high In the Fourier filter, the filter is suitable for high-precision electrical measurement and fault location