DESIGN AND EXPERIENCE WITH A FUZZY-LOGIC CONTROLLER FOR AUTOMATIC-GENERATION CONTROL (AGC)

This paper describes the design, implementation and operational perfor mance of a fuzzy controller as part of the Automatic Generation Contro l (AGC) system in Eskom's National Control Centre. The fuzzy controlle r was implemented in the control ACE calculation, which determines the shortfall or surplus generation that has to be corrected. This paper sets out the problems associated with secondary frequency control and AGC. The difficulties associated with optimising the original standard AGC controller, the design. implementation and optimisation of the fu zzy controller and the operational performance of the new controller o ver two years, are discussed. The fuzzy controller was integrated into the existing off-the shelf AGC system with only a few modifications. The operational performance over two years showed an overall improveme nt of over 50% in the reduction of control compared to the original AG C controller, and an initial improvement of 20% in the quality of cont rol of the optimised original controller.