Currently

harmonic pollution is getting worse

and flexible way to compensate for harmonic suppression is significant. In light of this

the paper proposes an approach based on active power filter selective harmonic compensation current control method

the generalized integral controller and PI controller is designed and applied. And its spectrum at its point of resonant frequency is analyzed. This method realizes the difference between non-static current selection tracking compensation control

saving the harmonic detection link

and verifying its effectiveness on the laboratory prototype.