earticle

영어

With the use of the power electronic device, the grid is more and more serious from the harmonic. In this paper, we improve the related link of active filter on the basis of the predecessors. And we get an ideal effect. Firstly, the traditional method uses low pass filter in the filtering process of harmonic detection technology. We introduce a digital moving average filter in this paper. Secondly, the traditional method uses the Hysteresis comparison control and triangle carrier wave control on the current control strategy. We introduce the comparison of timing control to this paper, It can easily control the sampling frequency.