Stabilizer Design for a Two Area Power System Network

Abstract

A power system stabilizer is an ancillary device used for improving stability of otherwise poorly stable power system. It helps to restore the system back to the operating point after disturbances like load changes or faulty situations are withdrawn or smoother transition from one to another operating point. Originally, power system stabilizers are installed to add damping to local oscillatory modes, which were destabilized by high gain, fast acting exciters. Its property is to provide damping torque to reduce the electromechanical oscillations introduced in the system under disturbances. We analyze the small signal stability for a power system using linearized model and design a stabilizer for single machine infinite bus system. Then the study is extended for a two area system where small signal and transient stability for both intra-area and inter-area modes is observed. The simulation is performed using MATLAB package, SIMULINK and Power System Toolbox (PST).