Improved Control Strategy of a Shunt Active Power Filter Using an adaptive fuzzy direct distorting power control and an adaptive fuzzy logic controller

An increase in residential, commercial, and industrial non-linear loads connected to the power distribution network results in non-sinusoidal currents generation. These currents cause the appearance of harmonics to alter the operation of electrical equipment, reduce network performance and cause component damage. The most solution to these problems is the use of Shunt Active Power Filter (SAPF). The purpose of this paper is the design of an adaptive Fuzzy logic Direct distorting Power Control (AFL-DDPC) to attenuate the harmonic effect. This control method is known to reduce the fluctuations of the active and reactive powers at low speeds in contrast to the classical approach, where the frequency of switching is uncontrollable. Furthermore, an adaptive fuzzy logic PI controller (AFLC-PI) controls the DC-link capacitor voltage for the compensation performance of the APF to improve the quality of the electric currents. Simulations results of the SAPF are presented to compare the performance of the proposed and the classical control approaches.