Computer controlled load-shedding for a co-generation facility

The installation of a load shedding and load restoration system used in conjunction with a cogeneration installation is described. When the utility source fails, the generators will be shut down by their under frequency relays unless the overload is shed. The load shedding system continuously monitors the sheddable loads as well as the generator and utility source capabilities. When any of these sources fail, loads are shed on a predetermined but changeable priority basis before the under frequency relays operate to shut down the generators. This same project involved the installation of synchronizing and paralleling equipment for two smaller high-speed standby diesel generators. The various aspects of the design and installation, including design criteria, software development, and hardware selection are described.<
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