A Robust Method of Tuning the Feedback Gains of a Variable Structure Load Frequency Controller Using Genetic Algorithm Optimization

In this article, the tuning of feedback gains of a variable structure load frequency controller by genetic algorithm optimization of selected performance indices is presented. The load frequency control of a single- and multi-area power system has been carried out. The effect of generator rate constraints has been studied. The system performance against step load variations has been simulated and compared with the conventional trial-and-error method. The results show that the system dynamic performance has been improved, the control effort has been reduced, the controller is robust against large disturbances, and the system is insensitive to wide parameter variations.