Fopid Design for Load-frequency Control Using Genetic Algorithm

1-Department of Electrical Engineering, Amirkabir University of Technology, Tehran 1591634311, Iran * Corresponding author email: [email protected] ABSTRACT: A fractional order PID (FOPID) for a load frequency control (LFC) is presented in a three-area power system. FOPID controllers are designed the same way as PID controllers are, with the difference that FOPID controllers have five parameters in the controller that should be determined. That is why they have two more degrees of freedom for better tuning the dynamical characteristics of the controller compared to PID controllers. Once the FOPID is designed using Genetic Algorithm (GA), a comparison is made between this approach and FOPID controllers that are designed with other optimization methods such as Imperialist Competitive Algorithm (ICA). Then, the results of the frequency change and transferred power change of each area by FOPID are compared in comparison the PID controller designed using GA. The results indicate that FOPID controllers tail better characteristics compared to the PID controllers. It is also revealed that FOPID controllers designed using GA have better characteristics compared to those designed using other optimization methods such as ICA.