Load Frequency Control for An Interconnected Multi Areas Power System Based on optimal Control Techniques

Abstract

this work illustrated the load frequency control (LFC) for three areas interconnected hydro, wind and thermal power system. Some different testes were done then recorded then analyzed at variable kinds of controllers. These kinds like proportional-integral-derivative (PID), fractional order PID, fuzzy PID and fuzzy fractional order PID controllers. The different controller’s gains obtained using particle swarm optimization (PSO) technique under the using of the objective function named as integral time absolute error (ITAE). There is a comparison between the system performance under PID, FOPID, FPID and FFOPID controllers. This comparison was made due to appear the proper controller which give the better performance for the proposed system. The main goal of LFC is to return the magnitude of the frequency and the magnitude of the power transfer through the tie line back to its first value before the disturbance occur. or to make the offset in the frequency and the offset in the power transfer through the tie line nearly equal to zero. The simulation results obtained in this work when the load in the conventional second area (thermal area) subjected to a disturbance of 1% (step load disturbance). The MATLAB SIMULINK program is used to show all the data and the curves obtained.