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

Document Type : Research Paper

Authors

1 Kafrelsheikh University, Faculty of Engineering, Dept., of Electrical Eng., Kafrelsheikh, Egypt

2 Life Senior Member, IEEE, Sharaf Energy Systems, Inc., Fredericton, NB-Canada

Abstract

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

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Main Subjects