Enhancement of Reliability Analysis for a 6-Bus Composite Power System using the Combination of TCSC & UPFC

Implementation of new equipment consisting high power electronics based technologies such as Flexible Alternating Current Transmission Systems (FACTS) and proper controller design become essential for improvement of operation and control of power systems. Major positive impacts on power system reliability performance and the actual benefits obtained can be assessed using suitable models and practice using FACTS Technologies. Emerging techniques for composite power system reliability evaluation mainly focus on conventional generation and transmission facilities. In this paper, the impact of FACTS controllers on Enhancing Composite Power System Reliability of IEEE 6 Bus Roy Billinton Test System (RBTS) is examined by incorporating the controller devices. A novel approach of composite power system has been presented by incorporating FACTS controllers in the RBTS system in all the transmission lines for determining the system reliability. In this paper, an attempt is made to study the impact of Thyristor Controlled Series Capacitor (TCSC) & Unified Power Flow Controller (UPFC) combination on composite power system by using state space enumeration techniques. In order to improve system performance the impact of the combination of TCSC & UPFC has been considered. Investigation results show a significant improvement in the Load point, system indices, probability of failure & Expected Energy Not Supplied (EENS) in all transmission lines & generation capacity.