Abstract
Within an Energy Management System, the Generation Scheduling and Control function controls the electrical power output of generators so as to supply the continuously changing customer power demand in an economical manner. This function is largely provided by an Automatic Generation Control (AGC) program operating within the control center computer. Power system dispatchers also play an important role, interacting with the program to incorporate current operating conditions. This paper summarizes the system characteristics associated with AGC, as well as current practices of program design and operation. Topics of current interest are also discussed. Current technology in this area is fairly mature, and existing performance is good over-all. Current issues such as fuel scheduling, dispersed generation technologies, and advanced load management schemes may change the nature of the AGC problem in the future.

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