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UPFC for Enhancement of Angle Stability Using Optimization Technique

M.Jeyamurugan, A.Nachammai

this paper deals with the damping of power system oscillations using the FACTS device Unified power flow controller (UPFC). This enhances the small signal angle stability. It combines the features of both static synchronous compensator (STATCOM) and static synchronous series compensator (SSSC). The main function of UPFC is power flow control and secondary functions are enhancement of small signal stability, transient stability, voltage control and oscillation damping. Firefly algorithm for optimizing the parameters of damping controller using Integral square error (ISE) technique has been implemented in this paper. Integral time absolute error also calculated. A single machine infinite bus system is considered for case study and it is implemented in MATLAB simulink. The Simulation results clearly indicate the effectiveness and validity of the proposed method.