Load frequency control in four-area power systems using PID controller

In this paper, load frequency control (LFC) which is one of the most important issues in interconnected power systems is iffectuated by using PID controller which is used in many sectors, and also investigated its performance. Four-area power system is prefered for LFC problem in multi area power systems are more complex and important than one area power system. In this paper, LFC problem is defined firstly, and then mathematical models of power systems are explained. Finally PID controller are described shortly and power system is modelled by using MATLAB-Simulink platform.