Abstract—This paper describes the theory and simulation by matlab of flexible Alternative Current Transmission Systems (FACTS) devices used in the disturbed power systems. One of these devices, Unified Power Flow Controller (UPFC) will be chosen for a specific application, detailed in this paper. Simulation investigate the effect of UPFC on the voltage of the related bus, it’s also considers the effect on the amount active and reactive power flowing through the transmission system. Finally simulation results have been presented to indicate the improvement in the performance of the UPFC to control voltage in disturbed power systems.

Index Terms—Facts, UPFC, Power Systems, disturbances, Interface, Modelling, Controls.

Mechanic’s Department Skikda University
Electro mechanic’s Department Annaba University
Electronics Department Annaba University.

Cite: Salim. Haddad, A. Haddouche, and H. Bouyeda, "The use of Facts devices in disturbed Power Systems-Modeling, Interface, and Case Study," International Journal of Computer and Electrical Engineering vol. 1, no. 1, pp. 56-60, 2009.