Realibility analysis of composite power systems using facts controllers

Abstract

FACTS technologies can have major positive impacts on power system reliability performance and the actual benefits obtained can be assessed using suitable models and practice. Emerging techniques for composite power system reliability evaluation mainly focus on conventional generation and transmission facilities. In this thesis, the impact of FACTS controllers on Composite Power System Reliability on RBTS is examined by incorporating the controller devices. FACTS controllers are used for natural sharing of power where as series compensator is used for reducing the effect of inductance. Addition of capacitance in series with the transmission line modifies the reactance of line. Number of TCSC s and UPFC s are connected in series (which is a multi module), to determine the individual reliability. This can be done by using state space representation or series-parallel system configuration using network reduction technique. Reliability analysis of the entire transmission system is being carried out by using load indices like loss of load expectation (LOLE) and loss of energy expectation (LOEE). A comparison has been carried out between the FACTS controllers (UPFC and TCSC); the results show a major improvement in the system reliability when using UPFC and series compensator. Software has been developed to determine the load indices and the limiting state probabilities using MATLAB / C. newlineA 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. Multi module FACTS controllers are also incorporated newlinein the system to determine the reliability of the system by using state space representation or series parallel representation using network reduction technique. Investigation results show a significant improvement in the Load point, system indices, probability of failure and EENS when utilizing UPFC rather than TCSC in all transmission lines and generation capacity while comparing the FACTS devices.