Transient stability improvement in transmission line using SVC with Fuzzy Logic based TID controller

In this paper a new approach is taken to solve the stability problem in the power system with the help of Flexible AC Transmission System (FACTS) devices and Tilt Integral Derivative (TID) controller. The FACTS devices can enhance the power system capability of transmission. A number of FACTS devices are working in the power system. Among these FACTS devices, Static VAR Compensator (SVC) is a shunt connected FACTS device which can be used effectively in Voltage Control mode. In the MATLAB power system model, SVC is operating with a PI controller, which has simple functioning and is cheaper in operation but has poor performance with non-linear characteristics. So to overcome this problem the controller is designed as a combination of both TID controller and Fuzzy Logic controller. TID controller has a tilted component, which replaces the proportional component in the PID controller. In this paper the suggested controller has been tested on a 2 machine 3 bus power system using MATLAB/SIMULINK software. The simulation consumes lesser run time and there are fewer oscillations in the system with the hybrid TID and Fuzzy Logic controller.