A Unified Scheme of PSS and SVC for Voltage Profile Improvement in Electrical Grid Network

Abstract

Power System Stabilizer (PSS) plays a very vital role in enhancing the power system stability and ensuring maximum power transfer in response to a disturbance. However only use of PSS to damp out the oscillations during transient conditions may not be sufficient enough to enhance system stability. Further PSS also introduces great variations in the voltage levels. So, this paper aims to focus on the enhancement of power system stability of a two machine system imperilled to a LLLG fault with the help of the PSS being coordinated with Static Var Compensator (SVC). SVC not only further enhances the voltage stability and brings about better dynamic voltage control but also controls the amount of reactive power in the transmission lines. The system is designed and tested using MATLAB/Simulink environment. The figures found out signifies that the dynamic responses of the system are better in case of unified use of PSS and SVC than that using PSS alone.