FLATNESS BASED DAMPING of POWER SYSTEM OSCILLATIONS WITH UNIFIED POWER FLOW CONTROLLER

A comprehensive approach to the design of UPFC controllers (power-flow controller, DC-voltage regulator and damping controller) ispresented. 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 niE and on damping of the system oscillations, using a controllability index.A dual damping controller based on simultaneous modulation of UPFC control signals ing and bE is proposed.Investigations reveal that altemative damping controllers (damping controller ing, damping controller and dual damping controller) provide robust dynamic performance under wide variations in loading condition and system parameters.this conditions improve under controller based flatness on trajectory generation and trajectory tracking of output flat

Keywords:

flatness , damping , oscillations , feedback linearization