Comparing and evaluating the performance of SSSC with Fuzzy Logic controller and PI controller for transient stability enhancement

FACTS (flexible AC transmission systems) technology is one aspect of the power electronics revolution that is taking place in all areas of electric energy. The power transfer capability of a transmission line can be enhanced by the use of power electronics based system like FACTS that offer high speed and reliable control capability. The static synchronous series compensator (SSSC) is the second generation of the FACTS controller, which is used to control the power flow in the transmission line. This paper presents the details of extensive computer simulation of SSSC with a control method based on fuzzy logic technique. For closed loop operation, d-q control algorithm is used for better performance result. In this paper a comparative evaluation of PI controller based and fuzzy logic controller based static synchronous series compensator has been done for a test power system. Sensitivity of these controllers to the load variations is studied in MATLAB/SIMULINK and the simulation results are given.