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Case Report Open Access
This paper presents the optimization and coordination of the conventional FACTs device (i.e. Unified Power Flow Controller) damping controller in multi-machine power system. The design of this controller is based on time-domain analysis and implemented by using other conventional controllers (PSS & FUZZY) to damp low frequency electromechanical (iner-area) power oscillations. The detailed design procedure of UPFC controller is first addressed. Firstly, the parameters of unified power flow controller are optimized, and then a PSS & Hybrid Fuzzy logic controller for the coordination with Facts devices is presented. Digital simulations are then carried out to verify the feasibility of the proposed control scheme. The simulation done on the IEEE multi-machine power system with 12-bus and results are shows that the proposed damping method is implementable and UPFC based Fuzzy system providing the satisfactory performance than other conventional controllers and meeting the design objectives.