Shunt active filter with sliding mode control

This paper presents a simple control scheme which adopted the voltage source inverter to decrease current harmonics generated by the nonlinear load. The sliding mode control is used in the current control loop to achieve fast dynamics. Only the source currents are measured in the proposed control scheme to reduce the elements of current sensors needed in the conventional control approach. A simple proportional-integral controller is adopted in the voltage control loop to achieve slow dynamics. The proposed scheme can achieve high power factor, current harmonic elimination and reactive power compensation. A diode rectifier fed capacitive load as the nonlinear load is taken on the AC mains to demonstrate the effectiveness of the shunt active filter for reactive power and current harmonics compensation.