Stability Analysis of Single Machine Infinite Bus Power System Employing Robust Fuzzy Logic TCSC Controller

Abstract

This research paper focuses on the analytical design of robust fuzzy logic Thyristor Controlled Series Compensator (TCSC) for enhancing the dynamic stability of a Single Machine Infinite Bus (SMIB) power system. The performance of the proposed system with robust fuzzy logic based TCSC is tested with the system having conventional TCSC controller and robust H∞ TCSC controller. These controller actions are effective in damping low frequency oscillation resulting from various small disturbances like mechanical power input, terminal voltage setting, and speed deviation. Under these various disturbances condition, the stability analysis of the system is also carried out. Moreover, comparisons of Lead-lag TCSC, robust H∞ TCSC and robust fuzzy logic TCSC controllers based on settling time are analyzed. Further, the obtained results show that the system with robust fuzzy logic controller is capable of stabilizing the system faster than the conventional and H∞ TCSC controllers.