MODELLING THE EFFECT OF POWER SYSTEM STABILIZER TO REDUCE POWER SWING IN TRANSMISSION SYSTEM INTEGRATED WITH RENEWABLE ENERGY

Abstract

Power swing is an abnormal state of the power system, where the power flow in the transmission line changes in both direction and magnitude. Power swing is often caused by short-circuit, power switching, sudden change in loads or generation units. Power swing is a transient behavior that describes how the system adjusts to a new steady state. Although power swing is not neccessary a faulty condition, it can cause the protection system to trip, and in some cases leads to system blackout. A pratical method to minimize the effect of power swing is the use of  power system stabilizer (PSS) device. In this study, we focus on simulating the response of the transmission system during power swing. IEEE 9 bus integrated with wind power is used for simulation on ETAP software. The simulation results show that the power system stabilizer device can significantly reduce the influence of power swing in faulty conditions, thereby improving the stability of the power system.