Damping of power system oscillations with unified power flow controller (UPFC)
نویسنده
چکیده
A comprehensive approach to the design of UPFC controllers (power-flow controller, DC-voltage regulator and damping controller) is presented. Studies reveal that damping is adversely affected by the incorporation of a DC-voltage regulator. Investigations were carried out to understand the relative effectiveness of modulation of thc UPFC control signals inR, SB, niE and <5£ on damping of the system oscillations, using a controllability index. A dual damping controller based on simultaneous modulation of UPFC control signals inB and bE is proposed. Investigations reveal that altemative damping controllers (damping controller inB, damping controller SE and dual damping controller) provide robust dynamic performance under wide variations in loading condition and system parameters.
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