Single-phase half-bridge shunt active power filter employing fuzzy logic control

This paper describes implementation of half- bridge shunt-active power filter incorporating voltage (VCL) and current control loop (CCL) that has resulted with a reduction in the number of switches in use as compared to a typical H-Bridge voltage source inverter topology. The proposed system is connected in parallel with the load and at normal condition it gives appropriate compensation to solve problems such as current displacement and harmonics. Active pulse width modulation technique with fuzzy logic control strategy is proposed for voltage control. The system has fast response and is capable of being subjected to load variations. Hysterisis current control is used to shape the input current with fuzzy logic control to regulate the DC bus voltage of the compensator.