BUILDING LOAD REDUCTION DURING DEMAND RESPONSE

• US 20130184892A1
• Filed: 01/13/2013
• Published: 07/18/2013
• Est. Priority Date: 01/15/2012
• Status: Active Grant

• Current Assignee: Enlighted, Inc. (Siemens AG)
• Original Assignee: Enlighted, Inc. (Siemens AG)
• Inventors: Mohan, Tanuj, Ashar, Premal
• Granted Patent: US 9,323,233 B2
• Time in Patent Office: Days
• US Class Current: 700/297
• CPC Class Codes: G05B 13/02 electric
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G05B 2219/2642 Domotique, domestic, home control, automation, smart house

Abstract

Apparatuses, methods and systems for managing a building load reduction of a plurality of loads within a building are disclosed. One method includes assigning one or more loads of the plurality of loads to logical groups, assigning a sensitivity coefficient to each of the logical groups, wherein the sensitivity coefficient is directly proportional to an impact on occupants in the building to load changes, determining the baseline load for each of the logical groups, receiving a power reduction demand response, and reducing a load of each logical group based upon the sensitivity coefficient.

Claims

1. A method of managing a building load reduction of a plurality of loads within a building, comprising:

assigning one or more loads of the plurality of loads to a logical group of a plurality of logical groups;

assigning a sensitivity coefficient to each logical group of the plurality of logical groups, wherein the sensitivity coefficient is directly proportional to an impact on occupants in the building to changes in a power load of the logical group;

determining a baseline load for each of the logical groups;

receiving a power reduction demand response; and

reducing a power load of each logical group based upon the sensitivity coefficient and the baseline load of the logical group.

2. The method of claim 1, further comprising at least one load of at least one of the logical group sensing a parameter, and wherein a power load of the at least one load is based on the sensitivity coefficient and baseline load of the at least one logical group, and further based on the sensed parameter.

3. The method of claim 2, further comprising a plurality of the loads sensing the parameter continuously over time, thereby providing re-distribution of power loads continuously over time.

4. The method of claim 3, further comprising maintaining a power load target reduction over a target period , including continuously adapting to sensed parameter changes redistributed throughout the logical groups and power loads of the logical groups, based on the sensitivity coefficients and baseline loads of the logical groups.

5. The method of claim 1, wherein assigning logical groups comprises identifying a commonality between the one or more loads of the plurality of loads.

6. The method of claim 1, wherein assigning a sensitivity coefficient comprises determining an impact of the power load of the logical group to the users who utilize the loads of the logical group, wherein the sensitivity coefficient for each logical group is inversely related to a loss in productivity of an organization for a unit percentage reduction in a lighting load of the logical group.

7. The method of claim 1, wherein determining a baseline power load for each of the logical groups comprises monitoring a power load of the logical group over a period of time.

8. The method of claim 1, wherein if two logical groups have substantially identical baseline loads, then reducing the load of each logical group proportional to the sensitivity coefficient of the logical group.

9. The method of claim 1, wherein if two logical groups have substantially identical sensitivity coefficients, then reducing the load of each logical group proportional to the baseline power load of the logical group.

10. The method of claim 1, further comprising specifying a minimum power load for each of the logical groups, wherein the minimum power load preempts the reduced load of each logical group based upon at least one of the sensitivity coefficient and the baseline power load of the logical group, and limits the reduction of the power load of the logical group.

11. The method of claim 1, further comprising monitoring a load consumption for each logical group, and increasing or decreasing the load if required to achieve a specified load target.

12. The method of claim 1, further comprising sensing occupancy of areas of each logical group, and further comprising reducing the load to logical groups that do not sense occupancy upon receiving the power reduction demand response.

13. The method of claim 1, further comprising sensing occupancy of areas of each logical group, and further comprising accelerating reducing the load to logical groups that do not sense occupancy upon receiving the power reduction demand response.

14. The method of claim 1, further comprising sensing occupancy of areas of each logical group, initiating an occupancy timer upon sensing occupancy and further comprising reducing the load to a logical group upon receiving the power reduction demand response at a first rate if received during a time period of the occupancy timer, and reducing the load to the logical group upon receiving the power reduction demand response at a second rate if received after the time period of the occupancy timer, wherein the second rate is faster than the first rate.

15. A system for managing a power load reduction, comprising:

a plurality of loads

a demand response (DR) controller operative to;

assign groups of one or more of the plurality of loads to logical groups;

assign a sensitivity coefficient to each logical group of the plurality of logical groups, wherein the sensitivity coefficient is directly proportional to an impact on occupants in a building to changes in a power load of the logical group;

determine a baseline power load for each of the logical groups;

reduce a power load within the building upon receiving a power reduction demand response, comprising;

reducing a power load of each logical group based upon the sensitivity coefficient and the baseline load of the logical group.

16. The system of claim 15, further comprising the plurality of the loads sensing a parameter continuously over time, thereby providing re-distribution of the power loads continuously over time.

17. The system of claim 16, further comprising maintaining a power load target reduction over a target period , including continuously adapting to sensed parameter changes redistributed throughout the logical groups and power loads of the logical groups, based on the sensitivity coefficients and baseline loads of the logical groups.

18. A demand response controller, comprising:

a controller operative to;

assign groups of one or more of the plurality of loads to logical groups;

assign a sensitivity coefficient to each logical group of the plurality of logical groups, wherein the sensitivity coefficient is directly proportional to an impact on occupants in a building to changes in a power load of the logical group;

determine a baseline power load for each of the logical groups;

reduce a power load within the building upon receiving a power reduction demand response, comprising;

reducing a power load of each logical group based upon the sensitivity coefficient and the baseline load of the logical group.

19. The demand response controller of claim 18, wherein the plurality of the loads sense a parameter continuously over time, thereby allowing the demand response controller to provide re-distribution of power loads continuously over time.

20. The demand response controller of claim 19, the controller is further operative to maintain a power load target reduction over a target period, including continuously adapting to sensed parameter changes redistributed throughout the logical groups and power loads of the logical groups, based on the sensitivity coefficients and baseline loads of the logical groups.