Abstract
This paper discusses coordinated excitation and UPFC control to improve power system transient stability. The power system is linearized through direct feedback linearization technique. Robust approach is employed to deal with the uncertainties caused by parameter variations and the inclusion of UPFC controller. Only local measurements are required for designing the excitation controller. The series branch of UPFC is designed to damp the power oscillation during transient period. The shunt branch aims at maintaining bus voltage. The performance of the controllers is tested on a single-machine infinite-bus (SMIB) power system. Simulation results show that both of the series and shunt branch of UPFC help improve transient stability.
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