TCSC Controller Design Using Global Optimization for Stability Analysis of Single Machine Infinite-Bus Power System

This paper presents modeling, simulation and optimal tuning of thyristor controlled series compensator (TCSC) controller for the improvement of stability of a single machine infinite-bus (SMIB) power system. Different controller structures namely lead-lag (LL) and a proportional-integral-derivative PID for TCSC controller have been proposed and a comprehensive assessment of the effects of the tuned TCSC controller on test power system have been carried out. The controller parameters have been tuned using global optimization (multistart clustering GO) for IAE performance index of the power system. The proposed GO based TCSC controllers damp out the oscillations in the state variables of the SMIB system in 7 seconds while the settling time of the state variables for the system without TCSC controller is greater than 10 seconds when the test disturbance of 3-phase fault occurs at generator terminals.