Dynamic Stability Analysis of SMIB System with PSS, LQR and ROOC

Abstract

This paper describes the dynamic stability analysis of Single Machine Infinite Bus (SMIB) system with Power System Stabilizer (PSS), Linear Quadratic Regulator (LQR), and Reduced Order Observer based Optimal Controller (ROOC) for enhancement of dynamic stability under small disturbances. The generator parameters are identified through Heffron-Phillip’s model. The performance of the proposed controllers are analyzed at nominal load condition. The analysis is carried out through eigenvalues and time response results. The ROOC provides better dynamic results compared to LQR, PSS and without controller.