Method and apparatus for effecting controlled restart of electrical servcie with a utility service area

• US 8,527,107 B2
• Filed: 10/01/2010
• Issued: 09/03/2013
• Est. Priority Date: 08/28/2007
• Status: Active Grant

• Current Assignee: Landis+Gyr Technology, Inc. (Landis+Gyr Group AG)
• Original Assignee: Consert, Inc. (Landis+Gyr Group AG)
• Inventors: Forbes, Joseph W. Jr., Webb, Joel L.
• Primary Examiner(s): PATEL, RAMESH B
• Application Number:
  US12/896,307
• Publication Number:
  US 20110022239A1
• Time in Patent Office: 1,068 Days
• Field of Search: 700/22, 700/286, 700291-298, 323/299, 323/304, 323/318
• US Class Current: 700/295
• CPC Class Codes: G06Q 10/00 Administration; Management
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving

Abstract

An active load management system (ALMS) controllably restarts electrical service to service points in a utility service area after a power outage. The ALMS includes client devices installed at the service points and a central controller. In one embodiment, the controller associates numbers with the service points and stores the associations. Each service point may be associated with a unique number or a group of service points may share a number. After receiving notification that power is available, the controller determines a number and communicates the number to one or more of the client devices. Where the number was determined randomly, the client devices associated with the number may restart electrical service upon receipt of the number. Where the number was determined sequentially, a client device may determine its own random number and compare it to the received number. If a match occurs, electrical service can be restarted.

Claims

1. A method for restarting electrical service at a service point in a utility service area after a power stoppage, the method comprising:

determining a random number associated with the service point;

determining a time at which to restart electrical service at the service point based at least on the random number; and

supplying electrical power to at least one power consuming device located at the service point at the determined service point restart time.

2. The method of claim 1, wherein a supply of electrical power to the at least one power consuming device is controlled by a control device located at the service point and wherein the step of determining a random number comprises:

determining, by the control device, the random number associated with the service point.

3. The method of claim 2, wherein the step of determining a random number comprises:

receiving, by the control device, the random number from a central controller located remotely from the service point.

4. The method of claim 2, further comprising:

receiving, by the control device, a number from a central controller located remotely from the service point;

wherein the step of determining a time at which to restart electrical service at the service point includes;

comparing the received number to the random number; and

determining the time at which to restart electrical service at the service point when the received number matches the random number.

5. The method of claim 2, further comprising:

estimating an amount of time required to complete a restart of electrical service in the utility service area;

determining a start time for commencing the restart of electrical service in the utility service area; and

estimating a completion time for completing the restart of electrical service in the utility service area based on the estimated amount of time required to complete the restart of electrical service in the utility service area and the start time for commencing the restart of electrical service in the utility service area;

wherein the time at which to restart electrical service at the service point is determined based on the random number and the start time for commencing the restart of electrical service in the utility service area, wherein the random number is between zero and the estimated completion time, and wherein electrical power is supplied to the at least one power consuming device at a current time of day in the event that the determined service point restart time is no later than the current time of day.

6. The method of claim 2, wherein supplying electrical power to the at least one power consuming device comprises:

communicating at least one power control command to at least one controllable device that controls a flow of electrical power to the at least one power consuming device, the at least one power control command instructing the at least one controllable device to enable a flow of electrical power to the at least one power consuming device.

7. The method of claim 1, wherein a supply of electrical power to the at least one power consuming device is controlled by a control device located at the service point, wherein the control device receives control messages from a central controller that is located remote from the service point and that interfaces between an electric utility and a plurality of service points, wherein the random number is determined by the central controller, and wherein the method further comprises:

determining, by the central controller, a customer profile associated with the service point;

wherein the step of determining a time at which to restart electrical service at the service point includes;

determining, by the central controller, a time at which to restart electrical service at the service point based at least on the random number and the customer profile.

8. The method of claim 7, wherein the customer profile includes an indication of a priority of service for the service point.

9. The method of claim 1, wherein a supply of electrical power to the at least one power consuming device is controlled by a control device located at the service point, wherein the control device receives power control messages from a central controller that is located remotely from the service point and that interfaces between an electric utility and a plurality of service points, wherein the random number is determined by the central controller, and wherein the method further comprises:

determining, by the central controller, a characteristic of the service point;

wherein the step of determining a time at which to restart electrical service at the service point includes;

determining, by the central controller, a time at which to restart electrical service at the service point based at least on the random number and the characteristic.

10. The method of claim 9, wherein the characteristic includes a geographic location of the service point.

11. The method of claim 1, wherein the random number is associated with a group of service points, wherein the group includes only a portion of a plurality of service points in the utility service area, and wherein the service point is included in the group.

12. The method of claim 1, wherein a supply of electrical power to the at least one power consuming device is controlled by a control device located at the service point and wherein the step of determining a time at which to restart electrical service at the service point comprises:

receiving, by the control device, a control message from a central controller located remotely from the service point; and

determining, by the control device, the time at which to restart electrical service at the service point based on the control message.

13. A method for a control device to restart electrical service at a service point in a utility service area after a power stoppage, the control device being installed at the service point and controlling a supply of electrical power to at least one power consuming device located at the service point, the method comprising:

estimating an amount of time required to complete a restart of electrical service in the utility service area;

determining a start time for commencing the restart of electrical service in the utility service area;

estimating a completion time for completing the restart of electrical service in the utility service area based on the estimated amount of time required to complete the restart of electrical service in the utility service area and the start time for commencing the restart of electrical service in the utility service area;

generating a random number, wherein the random number is between zero and the estimated completion time;

determining a random start time for restarting electrical service at the service point based on the random number and the start time for commencing the restart of electrical service in the utility service area;

comparing the random start time to a current time of day; and

restarting electrical service at the service point at the current time of day in the event that the random start time is no later than the current time of day.

14. The method of claim 13, further comprising:

generating another random number in the event that the random start time is later than the current time of day;

determining a new random start time for restarting electrical service at the service point based on the other random number and the start time;

comparing the new random start time to the current time of day; and

restarting electrical service at the service point at the new random start time in the event that the new random start time is no later than the current time of day.

15. A method for a central controller to restart electrical service at a plurality of service points in a utility service area after a power stoppage, the central controller being located remotely from the plurality of service points, each service point of the plurality of service points including a control device, each control device controlling a supply of electrical power to at least one power consuming device located at a corresponding service point, the method comprising:

associating a number with at least one service point of the plurality of service points, wherein a quantity of the at least one service point is less than a quantity of the plurality of service points;

generating a random number;

comparing the random number to the number associated with the at least one service point; and

communicating a restart message to at least one control device installed at the at least one service point in the event that the random number matches the number associated with the at least one service point and the at least one service point has not yet had electrical service restarted.

16. The method of claim 15, wherein the at least one service point is a group of service points and wherein the step of transmitting comprises:

communicating the restart message to control devices for all service points in the group.

17. The method of claim 15, wherein the central controller is an active load director, wherein the at least one control device is at least one active load client, and wherein the number associated with the at least one service point is between one and the quantity of the plurality of service points.

18. A method for restarting electrical service at a plurality of service points in a utility service area after a power stoppage, each service point of the plurality of service points including a control device of a plurality of control devices, each control device controlling a supply of electrical power to one or more power consuming devices located at a corresponding service point, the method comprising:

selecting, by a central controller located remotely from the plurality of service points, a number within a predetermined set of numbers;

transmitting, by the central controller, a control message to the plurality of control devices, the control message including the selected number;

generating, by each control device of the plurality of control devices, a respective random number within the predetermined set of numbers;

comparing, by each control device of the plurality of control devices, the selected number to the respectively generated random number; and

supplying, by a particular control device of the plurality of control devices, electrical power to at least one power consuming device when the random number generated by the particular control device matches the selected number.

19. The method of claim 18, wherein supplying electrical power to the at least one power consuming device comprises:

communicating, by the particular control device, at least one power control command to at least one controllable device that controls a flow of electrical power to the at least one power consuming device, the at least one power control command instructing the at least one controllable device to enable a flow of electrical power to the at least one power consuming device.

20. A method for a control device to restart electrical service at a service point in a utility service area after a power stoppage, the control device being installed at the service point and controlling a supply of electrical power to at least one power consuming device located at the service point, the method comprising:

generating a random number within a predetermined set of numbers;

receiving a control message from a central controller located remotely from the service point, the control message including a number within the predetermined set of numbers;

comparing the number in the control message to the random number; and

supplying electrical power to the at least one power consuming device when the random number matches the number in the control message.

21. The method of claim 20, further comprising:

generating a new random number in the event that the number in the control message does not match the random number;

receiving a new control message from the central controller, the new control message including another number within the predetermined set of numbers;

comparing the number in the new control message to the new random number; and

supplying electrical power to the at least one power consuming device when the new random number matches the number in the new control message.

22. The method of claim 20, further comprising:

receiving a new control message from the central controller, the new control message including another number within the predetermined set of numbers;

comparing the number in the new control message to the random number in the event that the random number was greater than a number in a prior control message; and

supplying electrical power to the at least one power consuming device when the random number matches the number in the new control message.

23. The method of claim 20, wherein supplying electrical power to the at least one power consuming device comprises:

communicating at least one power control command to at least one controllable device that controls a flow of electrical power to the at least one power consuming device, the at least one power control command instructing the at least one controllable device to enable a flow of electrical power to the at least one power consuming device.

24. A method for a central controller to restart electrical service at a plurality of service points in a utility service area after a power stoppage, the central controller being located remotely from the plurality of service points, each service point of the plurality of service points including a control device, each control device controlling a supply of electrical power to at least one power consuming device located at a corresponding service point, the method comprising:

determining priorities of service for the plurality of service points based on respective customer profiles associated with the plurality of service points;

determining a prioritized order for restarting electrical service to the plurality of service points based on the priorities of service; and

transmitting a restart command to at least one control device in the event that a priority of service for at least one service point at which the at least one control device is installed matches a priority of service for which electrical service is being restarted according to the prioritized order.

25. The method of claim 24, wherein the at least one service point is a group of service points, the method further comprising:

generating a random number for each service point in the group of service points; and

transmitting the restart command to a particular service point of the group of service points based on the random number for the particular service point.

26. The method of claim 24, wherein the at least one service point is a group of service points, the method further comprising:

generating a random number for each service point in the group of service points;

transmitting a first restart command to a first service point of the group of service points based on the random number for the first service point; and

transmitting a second restart command to a second service point of the group of service points based on the random number for the second service point, wherein the second restart command is separated in time from the first restart command by a predetermined delay sufficient to allow the first service point to startup and reach steady state operation.

27. A method for a central controller to restart electrical service at a plurality of service points in a utility service area after a power stoppage, the central controller being located remotely from the plurality of service points, each service point of the plurality of service points including a control device, each control device controlling a supply of electrical power to at least one power consuming device located at a corresponding service point, the method comprising:

logically dividing the plurality of service points into a plurality of groups based on service point characteristics, wherein service points within a particular group share at least one common service point characteristic;

determining a prioritized order for restarting electrical service to the plurality of service points based on service point characteristics;

selecting a group of service points from the plurality of groups based on the prioritized order and at least one common service point characteristic for the group; and

transmitting a restart command to a group of control devices installed at the selected group of service points.

28. The method of claim 27, wherein service point characteristics include at least one of geographic location and power consumption.

29. A central controller for use in an active load management system that includes a plurality of client devices installed at a plurality of service points located in a service area of a utility, the plurality of service points being located remotely from the central controller, the central controller comprising:

a database operable to associate a plurality of numbers with the plurality of service points;

an event manager operably coupled to the database and operable to;

determine whether electrical service can be restored to the plurality of service points after a power stoppage has occurred;

generate a random number responsive to a determination that electrical service can be restored;

compare the random number to each of the plurality of numbers; and

generate a restart message when the random number matches a number of the plurality of numbers; and

a client device manager operably coupled to the event manager and operable to transmit the restart message to at least one client device installed at one or more service points of the plurality of service points, the one or more service points being associated with the number that matched the random number.

30. A control device for use in an active load management system that includes a central controller located remotely from the control device, the control device being installed at a service point located in a service area of a utility and providing power control commands to one or more controllable devices which control a flow of electric power to one or more power consuming devices located at the service point, the control device comprising:

a communications interface operable to receive control messages from the central controller;

a processor operably coupled to the communications interface, the processor operable to;

determine a time at which a control message is received, wherein the control message includes an estimated length of time for power to be restored to the utility service area;

determine a restart completion time as the time at which the control message was received plus the estimated length of time for power to be restored to the utility service area;

generate a random number as a unit of time;

determine a random start time as the time at which the control message was received plus the random number;

compare the random start time to a current time of day; and

generate a power control command to initiate a restart of electrical service to the one or more power consuming devices when the random start time is no later than the current time of day; and

at least one controllable device interface operably coupled to the processor, the at least one controllable device interface facilitating communication of the power control command to the one or more controllable devices so as to effectuate the restart of electrical service to the one or more power consuming devices.

31. An active load management system operable to controllably restart electrical service to a plurality of service points in a service area of an electrical utility after a power stoppage, the active load management system comprising:

a central controller that includes;

a database operable to associate a plurality of numbers with the plurality of service points;

an event manager operably coupled to the database and operable to;

determine whether electrical power can be restored to the plurality of service points after a power stoppage has occurred;

generate a random number responsive to a determination that electrical power can be restored;

compare the random number to each of the plurality of numbers; and

generate a restart control message when the random number matches a number of the plurality of numbers; and

a client device manager operably coupled to the event manager and operable to transmit the restart control message to at least one client device installed at one or more service points of the plurality of service points, the one or more service points being associated with the number that matched the random number; and

a plurality of client devices located remotely from the central controller and installed at the plurality of service points, each client device including;

a communications interface operable to receive control messages from the central controller;

a processor operably coupled to the communications interface, the processor operable to generate a power control command responsive to receipt of a restart control message to initiate a restart of electrical service to a service point at which the client device is installed; and

at least one controllable device interface operably coupled to the processor, the at least one controllable device interface facilitating communication of the power control command to one or more controllable devices at the service point so as to effectuate the restart of electrical service at the service point.