Load regulation as part of an adaptive priority determination power demand control system
First Claim
1. In a power demand control system for controlling loads drawing energy from a power source, at least one load being adjustable in reference to a level of power to be consumed including:
- a power source meter common to said loads;
an individual power meter associated with said one adjustable load;
means responsive to said common power meter for selecting loads and for predicting a demand error relative to an assigned demand limit at the end of a control period, said demand error being predicted on a selection of available loads to be controlled for minimizing said demand error; and
means responsive to said predicted demand error for effectively controlling such selected available loads;
the combination of;
means responsive to said predicted demand error and operative as a result of said one adjustable load being selected for establishing a reference setting point defining said reference level of power to be consumed by said adjustable load;
feedback means responsive to said individual power meter for providing a feedback error relative to said setting point and for establishing said reference level of power consumed by said adjustable load, thereby to change said reference level of power consumed by said adjustable load in accordance with said setting point, whereby said demand error is minimized.
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Abstract
In a power utilization system having loads drawing energy from a utility company, some loads are adjustable and, as part of computerized power demand control system, loads are regulated as well as switched ON or OFF in order to meet an assigned power demand limit. The adjustable loads draw power in accordance with a local supply controller, such as a tap changer, but regulated amounts of power are established by the computer with a set point which is a function of the demand error calculated in an outer loop by the power demand control system and maintained by the computer in a closed loop from an individual power meter and with the established set point. The priority schedule and error computations take into account the amounts of power drawn by adjustable loads as well as the amounts drawn by loads which can be shed, or reconnected.
33 Citations
16 Claims
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1. In a power demand control system for controlling loads drawing energy from a power source, at least one load being adjustable in reference to a level of power to be consumed including:
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a power source meter common to said loads; an individual power meter associated with said one adjustable load; means responsive to said common power meter for selecting loads and for predicting a demand error relative to an assigned demand limit at the end of a control period, said demand error being predicted on a selection of available loads to be controlled for minimizing said demand error; and means responsive to said predicted demand error for effectively controlling such selected available loads; the combination of; means responsive to said predicted demand error and operative as a result of said one adjustable load being selected for establishing a reference setting point defining said reference level of power to be consumed by said adjustable load; feedback means responsive to said individual power meter for providing a feedback error relative to said setting point and for establishing said reference level of power consumed by said adjustable load, thereby to change said reference level of power consumed by said adjustable load in accordance with said setting point, whereby said demand error is minimized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification