Research on Parallel Shunt Hybrid Active Power Filter with repetitive LADRC algorithm

Parallel Shunt Hybrid Active Power Filter(SHAPF) has the advantage of high pressure and can dynamically compensate each harmonic, which is becoming popular harmonic control[3] devices. Liner auto disturbance rejection controller (LADRC) does not rely on the controlled object model, which solves the problem of uncertainty model about SHAPF. But it can only offset a part nonlinear of the system, there is still uncertainty. In this paper, repetitive control algorithm is added and Repetitive Linear Auto Disturbance Rejection Control (RLADRC) is proposed to improve compensation accuracy. Matlab/Simulink is applicated to simulate them, and the experiment platform of SHAPF is built, the simulink and experiment results show that the proposed method can effectively eliminate the tracking error, so as to improve the robustness of the system.