Experimental Investigation of Fuzzy Logic Controller Based Indirect Current Control Algorithm for Shunt Active Power Filter

With the increasing use of various non-linear loads connected in the electrical power grid, the power quality distortion has become an important issue. The shunt active power filtering system is one of the multiple solutions to suppress harmonics and compensate reactive power, its performance is mainly based on the chosen technique to determine reference harmonic current. There are many methods for identifying and generating the harmonic current, each method offers advantages and drawbacks. In this manuscript, the indirect current control algorithm (ICC) is used which is based on a simple mathematic algorithm and a minimum of sensors. The aim of this paper is to show with a real time implementation the high efficiency of the ICC using a fuzzy logic controller (FLC). The results obtained with FLC are found quite satisfactory by assuring high system stability in a transient state and good filtering characteristic of source current than those of traditional methods. Matlab/simulink software and dSPACE 1103 AutoBox hardware are used to perform the proposed system.