This paper presents the design of an intelligent fuzzy gain scheduled proportional-integral (FGSPI) controller as the supplementary controller for load frequency control (LFC) of two-area interconnected power system with reheat type thermal unit of equal capacity in each area. The dynamic response has been studied for 1% step load perturbation in area-1. The proposed FGSPI controller is compared against conventional proportional-integral (PI) controller and state feedback linear quadratic regulator (LQR) controller using settling times, overshoots and undershoots of the tie-line power and frequency deviations as performance indices. Comparative analysis indicates that the proposed intelligent controller gives better performance than conventional controllers.

4437a360.pdf

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