Authors : E. Latha Mercy, R. Karthick and S. Arumugam
Abstract: This study describes the application of Fuzzy Logic Controller to a three phase Shunt Active Power Filter (SAPF) for the power quality improvement required by a non-linear load. The SAPF controller is based on instantaneous power theory (p-q theory) which is recognized as one of the best methods. The output current of the Voltage Source Inverter (VSI) would track the reference current produced by the p-q algorithm. The Fuzzy Logic Controller (FLC) is used to regulate the DC link capacitor voltage and to control VSI AC output current, respectively. The current control method used in this study is related to Fuzzy Controller based PWM current controller wherein the switching signals are generated by means of comparing a carrier signal with the output of the fuzzy controller. The system is verified by simulation using MATLAB/Simulink simulation package. Experimental results show that the system effectively reduces the Total Harmonic Distortion of the source current below 5% according to IEEE-519 standard.
E. Latha Mercy, R. Karthick and S. Arumugam, 2010. Fuzzy Controlled Shunt Active Power Filter for Power Quality Improvement. International Journal of Soft Computing, 5: 35-41.