A new automatic load control for turbine generators

IN AN interconnected power system, load changes sufficient to affect system frequency are shared by all the generators on the system in proportion to their ratings and their governor characteristics. While this is desirable in most instances, it may present a problem where large fluctuating loads are remote from major sources of generation. Such a problem exists in the case of a new aluminum rolling mill near Davenport, Iowa, whose electrical requirements are supplied by the Iowa-Illinois Gas and Electric Company. The mill load swings are expected to vary between 5,000 and 8,000 kw above and below the mean load (16,000 kw maximum total swing) and vary at a rate of between 2,000 and 5,000 kw per second.