Design of GA Tuned Two-degree Freedom of PID Controller for an Interconnected Three Area Automatic Generation Control System

摘要

In this paper an innovative controller named parallel two-degree freedom of PID controller has deliberated and employed in an interconnected three area reheat thermal power system. The optimal controller gains obtained by using Genetic algorithm and the Integral Time Squared Error (ITSE) employed as an objective function. To realize the system practically, physical constraints like generator rate constraints and governor dead band nonlinearities have considered. To compensate the loss of kinetic energy during sudden load increase Superconducting Magnetic Energy Storage used in each area. The results gained by using GA tuned parallel two-degree freedom PID controller has compared with the conventional Ziegler’s Nichols tuned PID controller and genetically tuned PID controller. The GA tuned parallel two-degree freedom of PID controller produces better transient response characteristics for frequency and tie line power deviations under step load perturbations. The system simulation have realized by means of MATLAB/SIMULINK software.