Allocation of energy production changes to meet demand changes
AssigneeHoneywell International Inc.
InventorZdenek Schindler
Life of this patent
Estimating the term…
Abstract
A computer implemented method optimizes a utility plant having multiple devices to convert input energy into output energy for a building. The method includes dividing a utility plant scheduling interval into several control intervals and for each control interval, obtaining a difference between a desired and a measured in-building condition controlled by output power from the utility plant, obtaining current values of multiple factors that influence operation of the utility plant, determining a new power demand of the building expected to decrease the difference, and finding set points for the multiple devices that satisfy the new power demand, take into account response times of the devices and their capacities, and optimize utility plant operation costs.
Claims20
A method of controlling a utility plant having multiple devices which consume power and provide energy, the method comprising:
- receiving a forecast of building energy demand;
- receiving a forecast of factors influencing the operation of the utility plant;
- operating an optimizer in a scheduling mode to determine which devices should be on and to provide control actions to specify a set point for each running device so that the operation is economically optimal and no constraint is violated;
- and
- operating the optimizer in a control mode to distribute energy demand between the devices based on efficiency and response times of the devices to minimize purchased energy cost.
A computer implemented method of optimizing a utility plant having multiple devices to convert input energy into output energy for a building, the method comprising:
- dividing a utility plant scheduling interval into several control intervals and for each control interval:
- obtain a difference between a desired and a measured in-building condition controlled by output power from the utility plant;
- obtain current values of multiple factors that influence operation of the utility plant;
- determine a new power demand of the building expected to decrease the difference;
- and
- find set points for the multiple devices that satisfy the new power demand, take into account response times of the devices and their capacities, and optimize utility plant operation costs.
The method of claim 13 wherein device set points are determined to minimize cost of energy from public resources (C) in accordance with
- ∑
- k
- =
- 0
- K
-
- C
- k
-
- (
- t
- )
-
- min
- ,
- where k is the index of purchased energy less earning from sold energy in the a t-th control interval.
A device comprising:
- a processor;
- input connections to receive energy demand, real time energy price data, and influencing condition information;
- and
- a memory device coupled to the processor and having a program stored thereon for execution by the processor to perform utility plant optimization by dividing a utility plant scheduling interval into several control intervals and for each control interval:
- obtaining a difference between a desired and a measured in-building condition controlled by output power from the utility plant;
- obtaining current values of multiple factors that influence operation of the utility plant;
- determining a new power demand of the building expected to decrease the difference;
- and
- finding set points for the multiple devices that satisfy the new power demand and take into account response times of the devices and their capacities.
Dependencies are inferred from the claim text.