Sensorless current shaping control technique for shunt active filters

This paper presents a sensorless control strategy for shunt power active filter. The proposed technique, already presented for PWM rectifiers, has the capability to reject harmonic components from the load and grid. An adaptive algorithm is employed to achieve a high power factor in the grid even for uncertain parameters of the circuit impedance and load power. A selective harmonic compensation is obtained by using multiple resonant control tuned in the desired components. Simulation and experimental results are presented for validation of the presented methodology.