DYNAMIC PERFORMANCE ENHANCEMENT OF POWER SYSTEM USING STATIC VAR SYSTEM

Abstract

Flexible Alternating current transmission system (FACTS) devices are used widely for the dynamic control of voltage, impedance and phase angle of high voltage AC lines. Thus with FACTS controllers the existing transmission facility can be fully utilized and hence minimizing the gap between stability limit and thermal stability. Many preventive measures to cope with dynamic instability problem in series compensated lines have been reported in literature [1]. Among these the application of Static Var Systems (SVS) controller has gained the importance in recent years in modern power systems due to its capability to work as Var generator and absorption systems [2, 3, and 4]. Besides voltage control and improvement of transmission capability SVS in coordination with auxiliary signals can be used for damping of power system oscillations effectively [5, 6]. The selection of location of an effective location and feedback signal is an important aspect to employ FACTS controllers [7].It is often...