A NOVEL MULTISTAGE FUZZY CONTROLLER FOR FACTS STABILIZATION SCHEME FOR SMIB AC SYSTEM

The paper presents a novel Hybrid-FACTS Based Stabilization Scheme controlled by a hierarchicaltwo-stage fuzzy logic (HFLC)-multi loop dynamic error driven controller. The proposed schemeincludes separate Fuzzy control stages for the PD and PID parts to ensure robust and effective dynamicspeed control and efficient energy utilization. The PD fuzzy stage used the global error and change oferror as the fuzzy input variables. The second stage is the PID-FLC regulation which utilizes theoutput of the PD-FLC stage and the integral of the global error as input fuzzy variables. Thesimulation results validate the proposed control scheme effectiveness and robustness with efficientenergy utilization, improved power quality and power factor at the Common AC Bus and load bus. ADigital simulation model of the proposed system is developed in Matlab/Simulink/Simpower SoftwareEnvironment using operational dynamic blocks available in Simulink library.

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