Active Disturbance Rejection Controller for PWM Rectifier

To suppress the influence of PWM voltage source rectifier DC output voltage on the load changes,active disturbance rejection controller(ADRC) for PWM rectifier voltage loop is proposed.The load-disturbances are all contributed to the total disturbances and extended state observer(ESO) is used to estimate,compensate and control the total disturbances.Simulation results showed that the proposed method can achieve high power factor,low harmonic,and fine dynamic performance.It has better robust property to load-disturbance than fuzzy PID.