Research on Active Power Filter Based on Linear Active Disturbance Rejection Control

Abstract

In view of the key technology of active power filter (compensating current tracking control) to solve the harmonic problem of power system, the traditional PID control has defects and is divorced from the engineering practice. However, ADRC inherits the advantages of PID control and modern control theory. Without knowing the specific mathematical model of the object and the specific form of the external disturbance, it can compensate the internal disturbance while suppressing the external disturbance. It has strong robustness and adaptability. However, the traditional nonlinear auto-disturbance rejection technology has too many parameters, which hinders its wide application. Therefore, we introduce linear auto-disturbance rejection technology and design a current tracking control system of active power filter based on linear auto-disturbance rejection, which makes the control performance of active power filter more ideal and more widely used. Simulation experiments verify the feasibility of the study.