Intelligent controller based three phase shunt active filter for THD reduction in non-linear load and capacitor voltage stability

This study presents on a shunt active filter (SAF) for the power quality enhancement and voltage stability in the power systems. The main aim is to investigate the various control methodologies for the compensation of current harmonics, voltage stability and the reactive power owing to the non-linear loads at various operating conditions. In addition, in this paper one of the intelligent controller like fuzzy logic controller (FLC) and proportional integral controller (PIC) is applied for the stabilizing the DC bus capacitor voltage during the transient as well steady state conditions. The reference currents are extorted from the unit sine vector multiplied with the approximated peak reference current. The voltage source inverter P W M gating switching signals are generated through the hysteresis current controller (HCC). The performance of SAF is validated through MATLAB/Simulink simulation at different conditions using designed controllers. The theoretical analysis, design and simulation results are demonstrate that the designed FLC is produced stabilized DC bus capacitor voltage under the transient region., and also the suppresses the current harmonics in the supply side.