The Research of Active Disturbance Rejection Control on Shunt Hybrid Active Power Filter

This paper thoroughly analysis the principles and structures of active disturbance rejection control (ADRC), and applied it to shunt hybrid active power filter (SHAPF). Based on the principles of ADRC, this paper regards the uncertainties both within and external of the system model as unknown interference of system, then estimating through extended state observer (ESO), and compensating by nonlinear feedback control (NLSEF), which makes the control law of the system is only related to specified input / output, and reduces detections in control process, i.e. simplifies complex control process. Excellent results can be achieved in system simulation by selecting Parameter, which proves the possibility of control strategy.