Modelling of Load Frequency Control Using PI Controller and Stability Determination with Linear Quadratic Regulator

Abstract

Load frequency control has a very important role in power system operation and control. The main objective of load frequency control are to keep the frequency deviation and tie line power deviation within acceptable limit when a load change occurs in that power system. This paper demonstrates an integral controller action to minimize the frequency deviation and the tie line power deviation. Also to determine the stability of the system, an optimal controller which is known as 'Linear Quadratic Regulator' is used. The results are illustrated by using MATLAB/SIMULINK.