Fuzzy Controller Based UPQC for Power Quality Improvement

The paper proposes a unified power quality controller (UPQC) using a fuzzy logic controller (FLC). The results obtained through the FLC are good in terms of dynamic response because of the fact that the FLC is based on linguistic variable set theory and does not require a mathematical model of the system. Also, the tough method of tuning the PI controller is not required for FLC. Simulations are carried out using MATLAB/Simulink to validate the theoretical findings.