DefinePK

Abstract

Performance and stability of shunt active power filters improves very much with the preferred current control strategy. Supply currents are made sinusoidal with proposed control technique consisting of two sensors at the supply side and absence of harmonic detector which is present in the conventional control scheme of shunt APF. Performance of Shunt Active Power Filter was compared with three control techniques namely PI controller; PI -Vector PI controller; Fuzzy-Vector PI controller with both Six Switch Three Phase Inverter and Four Switch Three Phase Inverter. It was observed and proposed that SSTPI can be replaced with FSTPI, as it is having the comparable results of SSTPI with reduced hardware & thereby cost. The proposed technique is capable of mitigating harmonic currents and reactive power to achieve unity power factor condition at the supply side. Variations in the supply side currents in terms of harmonic distortion were presented in the paper for all the controllers at different loads and load changes.