مشخصات پژوهش

Low frequency oscillations may cause blackouts. Power system operators are increasingly facing instability problems due to the fact that the current system is much more loaded than before. Tuning the lead-lag controllers, as power system stabilizers (PSS) or FACTS-based supplementary stabilizers, is a well-established method to enhance the damping capability of power systems. In this paper we propose a technique to optimally locate the place of unified power flow controller (UPFC) on a transmission line considering low frequency oscillation (LFO) damping. The proposed method is applied to a single machine infinite bus system equipped with UPFC and the results obtained show its superiority.