A comparative analysis of UPFC as a Power Flow controller with applications

Abstract

Flexible alternating current transmission systems (FACTS) technology opens up new opportunities for controlling power and enhancing the usable cap-acity of present, as well as new and upgraded lines. FACTS technology reveals up new opportunities for controlling power and enhancing the usable capacity of present, as well as new and upgraded lines.This project describes the real and reactive power flow control through a transmission line by placing the UPFC at the sending end of an electrical power transmission system. The Unified Power Flow Controller (UPFC) is a second generation FACTS device which enables independent control of active and reactive power besides improving reliability and quality of the supply.The power flow control performance of the UPFC is compared with that of the other FACTS device called Static Synchronous Series Compensator(SSSC),TCSC,STATCOM Simulations are carried out in Matlab/Simulink environment to validate the performance of the UPFC.Finally, an introduction to the basic circuits of several FACTS controllers was provided with a focus on their system performance characteristics. In addition, some of the utility experience, real-world installations, and semiconductor technology development have been reviewed and summarized. TCSC provide reactive power control on transmission lines. In this respect, UPFC has the advantage over TCSC and phase shifter that it can control not only real power but also reactive power flow on transmission lines simultaneouslyIndex Terms - Flexible AC transmission systems (FACTS), FACTS Controllers, Power flow, Real and reactive power, SSSC, TCSC, Unified power flow controller (UPFC).