ABSTRACT
Unified Power Flow Controller (UPFC) is a versatile FACTS device which can provide full dynamic control of a transmission line parameters, bus voltage, line impedance and phase angle for improved system security. However, the extent that performance of UPFC can be brought out, it greatly dependent upon the location and size of this device in the system. This paper present Differential Evolution (DE) Technique for optimal placement of UPFC device under steady state (i.e normal, moderate and critical) conditions and is aimed at real power loss minimization and voltage profile enhancement of an interconnected power system. The proposed method is applied on the IEEE 14 bus power system which is demonstrated through MATPOWER simulation package. The results obtained indicate that DE is robust and can significantly enhance the security of power system by reducing line losses and improved bus voltage profile within the acceptable limit.
