Controlled single-phase current source with LCL filter

This study proposes control algorithm for controlled single-phase current source. The power circuit of single-phase current source uses LCL type filter instead of a traditional L filter. The main advantage of LCL filter is lower current ripple, but it is necessary to use the advanced current control. Designed control algorithm combines model based (feedforward) control with a feedback direct current control based on resonant controllers, moreover use harmonic compensator and vector control to compensate for drops on LCL filter. Behaviour of designed control is analyzed by experiments made on developed low voltage laboratory prototype.