ADAPTIVE RULE BASE FUZZY LOGIC LOAD FREQUENCY CONTROL IN TWO AREA POWER SYSTEM

: In this paper, the adaptation to rule bases of the designed fuzzy logic load frequency controller (ARFLFC) for interconnected two-area power system load frequency control is designed as a decentralized controller. The proposed ARFLFC controller has been designed to damp the frequency and the tie line power flow oscillations and to track its error to zero at steady state under a sudden load disturbance in the power area. The main advantage of the proposed controller is that it can handle the nonlinearities and uncertainties of the system. The controller parameters are updated online, utilizing both the frequency and the tie-line power deviations as adaptation signals. Time-domain simulations have been performed using MATALB/ SIMULINK to show the efficiency of the proposed ARFLFC A bench-mark problem of a two area power system is used to demonstrate the performance of the proposed AFLFC controller and to show its superiority over conventional integral controller. The results illustrate that, in comparison to integral control, the proposed AFLFC minimizes the interchanged tie power, provides effective damping, and minimizes the overshoot of frequency deviations.