Patent US 4,141,069

A power demand control method uses a temporary demand limit in excess of the demand limit assigned as a target at the end of the demand period, and such temporary demand limit is reduced by steps from control point to control point until it coincides with the assigned target at the very end of the demand period. More specifically, the demand limit used for prediction is reduced by a major portion always the same from predicted demand error to the reset, thereby progressively reducing the same down to zero at the end of the period.