Fuzzy Logic Controller based Distribution Static Compensator

This paper presents distribution static compensator (DSTATCOM) using a Takagi-Sugeno (TS) fuzzy logic controller (FLC) for harmonic elimination, power factor correction, load balancing and voltage regulation. The TS fuzzy logic controller is based on linguistic variables which eliminates the need of a mathematical model of the DSTATCOM. A three phase insulated gate bipolar transistors (IGBTs) based current controlled voltage source converter (CC-VSC) is employed as a DSTATCOM. Two FLCs are used in proposed control algorithm. The DC link voltage of a DSTATCOM and amplitude of phase voltages are used as an input signals for the FLC. The PWM current controller is used to generate switching signals for CCVSC. Results have been obtained in MATLAB simulink environment to demonstrate the efficacy of proposed control algorithm as a harmonic eliminator, a power factor corrector, a load balancer and as a voltage regulator.