Control of active filters using source current detection

This paper presents a control scheme of the shunt active filters using the source current detection to suppress the source current harmonics. The proposed control scheme can minimize the source current harmonics under the given active filter capacity, which can be realized by adjusting the magnitude and phase of the compensation current using the complex compensation gains in the frequency domain. The effectiveness of the proposed control scheme has been verified by experiments. As a result, the good effect on the compensation for the source harmonic currents in the proposed control scheme is obtained compared with that in the conventional one.