Power Transfer Enhancement and Optimal Power System Security by use of Unified Power Flow Controller (UPFC)

Abstract

This paper presents a discussion of the effect of Unified Power Flow Controller (UPFC) on Power Transfer Capability and Optimal Power System Security of a Nigerian 330kV network. By development and implementation of low frequency damping controller, UPFC is used to mitigate low frequency oscillations associated with inter-area. Mitigation of low frequency oscillation enhances the stability limits of the system, thereby improving power transfer through the system. For better studying of the capability of FACTS control, a power injection model of FACTS devices, which enables simulating the control of UPFC, is employed. Studies based on the 330kV network with UPFC demonstrate the effectiveness of FACTS control on ATC enhancement. The UPFC regulates bus voltages and enhances Power Transfer Capability of the power network over transmission lines of the Nigerian network.