Fuzzy logic controller based Shunt Active Power Filter for Current Harmonic Compensation

This paper presents the performance investigation of three phase shunt active power filter (SAPF) using proportional integral (PI) and Fuzzy Logic controller (FLC). The control designing applied to active power filters (APFs) play a key role on the improvement the performance of APF. Compensate the harmonic component for the supply current, can improve the power quality and enhance the reliability and stability on power utility. In classical control systems like PI controller, information of the controlled system is essential in the formulation of a set of algebraic and differential equations, which analytically relate inputs and outputs. To overcome all these problems FL based control techniques can be used; it is designed to improve compensation capability by adjusting the current error using a fuzzy rule. The performance of these controllers acting on SAPF has been done on MATLAB simulation. The proposed system is composed by three phase source that fed a non-linear rectifier and impedance consisting of the combination of resistance and capacitance. The obtained results using the proposed controller give satisfactory results and verified through the simulations.