Fuzzy Logic based Automatic Generation Control

Automatic Generation Control (AGC) is a controlling technique used in electrical power generation to maintain a constant nominal frequency and power interchange with other linked systems by creating a balance of the generation of the system with system load losses. The frequency of the system deviates from its desired value if there is any sudden load change. If the frequency deviates in a large amount the system may get collapsed. Hence, a fast and accurate controller action is required to maintain stability and nominal frequency. For AGC many controlling techniques have been studied. In this paper, a PI controller is compared with a fuzzy controller. A two area system is considered both being thermal. Different step load changes have been considered and the performance of both the controllers has been observed in different load conditions. Simulation results have been brought up to show the better working of the fuzzy controller than the PI controller.