Simulation Research on Active Power Filter Application Based on Auto Disturbance Rejection Control

With the progress of science and technology and the improvement of living standards, the role of electricity in human life is becoming increasingly important, and a large number of nonlinear devices will also be connected to the power grid, which will cause harmonic pollution and seriously affect other electrical equipment in the power grid. To address this issue, active power filters have been proposed as one of the main methods for controlling harmonic pollution. However, active power filters can generate current and voltage surges during the startup process, which can pose a threat to the stability of the power system. Therefore, this article focuses on the starting process of parallel active power filters under three-phase three-wire system, and finally proposes a starting process based on auto-disturbance rejection control. Finally, simulation verifies that this control method is superior to PI control.