UPFC damping control strategy based on transient energy function

In this paper an innovative UPFC damping control strategy based on time-dom ain analysis of the system transient energy function (TEF) is proposed to d amp low frequency electromechanical power oscillations. Comprehensive compu ter simulations are carried out to verify the proposed control scheme. The control effectiveness of using a combination of different control modes in the UPFC system with respect to different input signals to improve the tran sient performance of power systems is investigated and discussed. Simulatio n results show that the proposed damping control strategy is extremely effe ctive and the UPFC is able to provide flexible control functions required f or the real-time power how regulation and fast transient control of power s ystems. (C) 2000 Elsevier Science S.A. All rights reserved.