An LMI based Robust H? SOF Controller for AVR in an SMIB System

Abstract

This paper presents the design of an H? (H-infinity) controller to stabilize an uncertain power system using mixed sensitivity approach through an iterative LMI (Linear Matrix Inequality) algorithm. Here a robust control methodology is suggested to improve the voltage regulation of a synchronous generator. H? control method is used in this control theory to synthesize controller to obtain robust performance and stabilization. This technique has the advantage over classical control techniques that it is readily applicable to the problems including multivariable systems. The proposed robust controller enhances the performance as well as minimizes the disturbances’ effect more effectively. In this paper the controller is designed and simulated under MATLAB/Simulink for electric generator stabilization studies for an SMIB system.