초록 ▼

A control method and system for minimizing the on-peak power demand of a residential electric utility user having a plurality of loads is implemented by determining the average energy demand over predetermined sliding time windows and comparing them with a control point. Non-priority loads are shed

A control method and system for minimizing the on-peak power demand of a residential electric utility user having a plurality of loads is implemented by determining the average energy demand over predetermined sliding time windows and comparing them with a control point. Non-priority loads are shed in an attempt to decrease the demand below the control point. If the energy demand is still above the control point after all non-priority loads are shed, the control point is dynamically adjusted upward and no priority loads are shed. Loads are shed by transmitting bits of information to the loads when the average energy demand over the predetermined time windows increases beyond the control point. Upon receiving bits of information indicating a load should be shed, the receiver deenergizes its load. The bits of information are synchronized to the zero crossing of the AC line. The bits are transmitted simultaneously and periodically. Central load control may decrease the power demand of the user in one or more predetermined steps. A method is provided for controlling multi-phase demand where the angles between phases are not necessarily equal.

대표청구항 ▼

A control method for minimizing during a billing period the on-peak power demand of a residential electric utility customer having an AC line and a plurality of interruptible non-priority loads and non-interruptible priority loads comprising the steps of: (a) defining a control point of desired powe

A control method for minimizing during a billing period the on-peak power demand of a residential electric utility customer having an AC line and a plurality of interruptible non-priority loads and non-interruptible priority loads comprising the steps of: (a) defining a control point of desired power demand; (b) shedding non-priority loads to attempt to decrease demand below the control point; (c) providing predetermined sliding time windows; (d) determining average energy demand of the loads over a predetermined sliding time window; and (e) dynamically increasing said control point to a new control point when all non-priority loads have been shed and when the average power demand within the time window increases beyond said control point whereby the value of the new control point is related to the last-named average power demand.