Damping of Oscillations of Multi-Machine Power Systems With Multiple UPFC

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Executive Summary

One of the important function of Unified Power Flow Controller (UPFC) is transient stability improvement and damping of oscillations in a power system network. This paper examines the impact of multiple UPFC on oscillation damping of a power system. A real based multi machine-65 bus system is modeled and analyzed with Unified Power Flow Controller (UPFC). The placement of the compensators is determined based on the transmission lines with highest voltage drop in the system. Transient stability effects are analyzed for three system cases, one without compensators, one with one compensator at a time and the last one with multiple compensators. Angle, angular speed of rotors is observed.

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