دانلود Fuzzy Logic Controller Based Three-Phase Shunt Active Power Filter for Compensating Harmonics and Reactive Power under Unbalanced Mains Voltages

Abstract

In  this  paper,  a  shunt  Active  Power  Filter  (APF)  is  proposed  for  the  compensation  of  harmonic  currents  and  reactive  power  in  polluted  environment  and  under  unbalanced  mains  voltage.  For  this  purpose,  a  fuzzy  logic  controller  is developed to adjust the energy storage of the dc voltage. The reference current computation of the shunt APF is based on the instantaneous reactive power (p-q) theory. We applied the system based on PLL (Phase Locked Loop) in order to control the shunt APF under unbalanced mains voltage. Hysteresis Controllers is used to generate switching signals of the voltage source inverter. MATLAB/SIMULINK power system toolbox is used to simulate the proposed system. The  results  show  the  effectiveness  of  fuzzy  logic  control  to  optimize  the  energy  storage  of  the  DC  capacitor,  the sinusoidal form of the current and the perfect of the reactive power compensation. The proposed system has achieved a low Total Harmonic Distortion (THD) which demonstrates the effectiveness of the presented method.