Tuning of Power System Stabilizers to Damp Out Power Oscillations

Sammanfattning: With the rise of global sustainability energy initiatives,the implementation of renewable energy sources infuture electrical grids is increasing. Many of the renewableenergy sources are however intermittent, meaning they providevarying levels of power. As grids meet the demand of largerloads of intermittent renewable energy sources, small signalinstability arises as result of the power oscillations. Small signalinstability occurs when a system cannot return to steady stateafter being exposed to small disturbances. One method to damppower oscillations in an unstable system is by using a PowerSystem Stabilizer (PSS). The goal of this project is to tunea PSS or PSSs required to successfully damp out the poweroscillations in a system which is small signal unstable without anyPSSs connected. The PSSs are tuned through a trial and errorapproach, and the system is a Kundur two-area four-machineMATLAB Simulink model. Overall, the trial and error methodis successful in tuning PSSs, which damp out the system’s poweroscillations. Other methods of tuning are discussed and comparedin terms of efficiency to damp out power oscillations.