Modeling and Optimal Location of UPFC for Real Power Loss Minimization

A new concept of Flexible AC Transmission system (FACTS) brought radical changes in the power system operation and control. A new technique using FACTS devices linked to the improvements in semiconductor technology opens new opportunities for controlling power and enhancing the usable capacity of existing transmission lines The UNIFIED POWER FLOW CONTROLLER is devised for the real time control and dynamic compensation of transmission systems, providing multifunctional flexibility required solving many of the problems facing the power delivery industry. Within the framework of traditional power transmission concepts, the UPFC is able to control, simultaneously or selectively all the parameters affecting power flow in the transmission line and this unique capability is signified by the adjective “unified” in its name. UPFC can independently control both active and reactive power in the line.