Research of robust repetitive current control strategy of active power filter

In view of problems of steady-state error and phase offset of traditional current loop PI control of active power filter, a robust repetitive current control strategy of active power filter was proposed, and concrete implementation method of robust repetitive control strategy was analyzed in details.The simulation and experimental results verify that the control strategy can achieve tracking of output compensation current with instruction current and improve anti-interference performance at the same time, which improves dynamic and static performance of active power filter significantly.