Automated demand response gateway

• US 9,124,132 B2
• Filed: 08/31/2012
• Issued: 09/01/2015
• Est. Priority Date: 08/31/2012
• Status: Active Grant

• Current Assignee: Siemens Industry Incorporated (Siemens AG)
• Original Assignee: Siemens Industry Incorporated (Siemens AG)
• Inventors: Songkakul, Pornsak, Soza, Ricardo, Patterson, John, Pawlowski, Michael
• Primary Examiner(s): Fennema, Robert
• Assistant Examiner(s): Norton, Jennifer L
• Application Number:
  US13/601,244
• Publication Number:
  US 20140067150A1
• Time in Patent Office: 1,096 Days
• Field of Search: 700/286, 700/295, 700/297, 307/38, 307/39
• US Class Current: 1/1
• CPC Class Codes: G01R 21/133 by using digital technique
• CPC Class Codes: G01R 22/00 Arrangements for measuring time integral of electric power or current, e.g. electricity meters
• CPC Class Codes: G06Q 10/06312 Adjustment or analysis of established resource schedule, e.g. resource or task levelling, or dynamic rescheduling
• CPC Class Codes: G06Q 50/06 Energy or water supply
• CPC Class Codes: H02J 2310/12 The local stationary network supplying a household or a building
• CPC Class Codes: H02J 2310/60 Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving

Abstract

A system and method for reducing an electrical load in a facility or building with an automated demand response server having a hierarchical grouping of demand stages and demand groups with associated timers that control the shedding of load in order to achieve the appropriate level of load reduction and ramping up devices in a controlled manner upon the expiration of a demand response event.

Claims

1. A method for an automated demand response (ADR) gateway that reduces an electrical load in a facility having a building automation system, the method comprising:

receiving a demand response message associated with a demand response event via a computer connected to a network, the demand response message identifying at least a duration of a demand response event and a target power level for the demand response event;

determining a first demand group to activate at the start of the demand response event, where more than one demand group exist;

activating the first demand group for a maximum timer period to achieve a first power saving;

activating a second demand group upon expiration of a delay time when the first demand group fails to meet the target power level for the demand response event; and

further starting a duty cycle timer at a start of a duty cycle period associated with the activation of the first demand group, and resetting the duty cycle timer upon expiration and reactivating the first demand group if it has been deactivated prior to the duty cycle timer expiring.

2. The method of claim 1, further includes deactivating the first demand group upon the expiration of the maximum timer period.

3. The method of claim 1, where at least the first demand group and the second demand group are associated with a first demand stage that has a first power shedding capability that is different from a second shedding capability of a second demand stage.

4. The method of claim 3, where the second demand stage is associated with at least one additional demand group that is not present in the first demand group.

5. The method of claim 1, wherein the target power level for the demand response event is further lowered by a demand hysteresis value.

6. The method of claim 1, further comprising setting a delay timer with a user interface.

7. The method of claim 1, further comprising setting a soft landing timer that defines a soft landing period during which the first demand group and the second demand group are deactivated if active.

8. An automated demand response (ADR) gateway that reduces an electrical load in a facility having a building automation system, comprising:

a client in a computer with a processor connected to a network in receipt of a demand response message that is associated with a demand response event, the demand response message identifying at least a duration of a demand response event and a target power level for the demand response event;

a memory with a first demand group that is activated by the processor at a start of the demand response event, where more than one demand group exist in the memory;

a first power reduction achieved by execution of the first demand group, where the execution occurs until expiration of a maximum time timer; and

a second demand group in the memory that is activated by the processor upon expiration of a delay time timer when the first demand group fails to meet the target power level for the demand response event; and

further includes a duty cycle timer that is started at a start of a duty cycle period that is associated with the activation of the first demand group, where the duty cycle timer is restarted upon expiration and the first demand group is reactivated if it has been deactivated prior to the duty cycle timer expiration.

9. The system of claim 8, wherein the first demand group is deactivated upon expiration of the maximum time timer.

10. The method of claim 8, where a first demand stage that has a first power shedding capability is associated with the at least the first demand group and the second demand group in the memory.

11. The method of claim 10, where a second power shedding capability is associated with a second demand stage having at least one additional demand group that was not in the first demand stage.

12. The method of claim 8, where a demand hysteresis value is included with the target power level for the demand response event.

13. The method of claim 8, further comprising a user interface that enables the setting of the delay time timer.

14. The method of claim 8, further comprising a user interface that enables the setting of a soft landing timer that defines the soft landing period during which any of the first demand group and second demand group that is active is deactivated.

15. A tangible, non-transitory computer readable media containing instructions, when executed by a processor result in a method for an automated demand response (ADR) gateway that reduces an electrical load in a facility having a building automation system, comprising instructions for:

receiving a demand response message associated with a demand response event via a computer connected to a network, the demand response message identifying at least a duration of a demand response event and a target power level for the demand response event;

determining a first demand group to activate at the start of the demand response event, where more than one demand group exists;

activating the first demand group for a maximum time period to achieve a first power reduction;

activating a second demand group upon expiration of a delay time when the first demand group fails to meet the target power level for the demand response event; and

further starting a duty cycle timer at the start of a duty cycle period associated with the activation of the first demand group, and resetting the duty cycle timer upon expiration and reactivating the first demand group if it has been deactivated prior to the duty cycle timer expiring.

16. The tangible, non-transitory computer readable media of claim 15, further includes instructions for deactivating the first demand group upon expiration of the maximum time period.

17. The tangible, non-transitory computer readable media of claim 15, where at least the first demand group and the second demand group are associated with a first demand stage that has a first power shedding capability.

18. The tangible, non-transitory computer readable media of claim 17, further includes instructions for a second demand stage associated with at least one additional demand group that is not present in the first demand stage having a second power shedding capability that is greater than the first demand stage.

19. The tangible, non-transitory computer readable media of claim 15, where the instructions for the power level for the demand response event is further lowered by a demand hysteresis value.

20. The tangible, non-transitory computer readable media of claim 15, further includes instructions for setting a soft landing timer that defines a soft landing period during which the first demand group and the second demand group are deactivated if active.