INTERNET BASED ENERGY CONTROL SYSTEM

• US 20120078547A1
• Filed: 09/27/2010
• Published: 03/29/2012
• Est. Priority Date: 09/27/2010
• Status: Abandoned Application

• Current Assignee: Lutron Technology Company LLC
• Original Assignee: Lutron Electronics Company Incorporated (Lutron Electronics)
• Inventors: Murdoch, John Bruce
• Application Number:
  US12/891,372
• Publication Number:
  US 20120078547A1
• Time in Patent Office: Days
• US Class Current: 702/62
• CPC Class Codes: G01D 4/004 Remote reading of utility meters to a fixed location
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y04S 20/30 Smart metering, e.g. specially adapted for remote reading

Abstract

A system and method for providing power usage information by an electric power meter. The meter measures and reports power usage of at least one of a plurality of electrical loads connected into an electrical power network, wherein the electric power meter is synchronized to measure power usage at a particular time, and is further configured and operable to communicate over a first data network that is communicatively coupled to a second data network, and further wherein at least one firewall is positioned between the first and second data networks.

Claims

1. A method for providing power usage information by an electric power meter that measures and reports power usage of at least one of a plurality of electrical loads connected into an electrical power network, wherein the electric power meter is synchronized to measure power usage at a particular time, and is further configured and operable to communicate over a first data network that is communicatively coupled to a second data network, and further wherein at least one firewall is positioned between the first and second data networks, the method comprising:

synchronizing a real time clock provided with the electric power meter with a first computing device wherein the first computing device is provided with an accurate timestamp from outside the firewall;

reading, by the electric power meter, an amount of power used by the at least one load at a particular point in time; and

transmitting, by the electric power meter via a first communication session between the electric power meter and the first computing device, usage information that represents the amount of electricity used by the at least one load device at the particular point in time, wherein the particular point in time is accurately represented as a function of the synchronized real time clock.

2. The method of claim 1, wherein the usage information includes an identification of the meter.

3. The method of claim 1, wherein the meter receives power usage information from a current transformer on the electrical power network.

4. The method of claim 1, wherein the usage information is stored in a database.

5. The method of claim 1, further comprising synchronizing the real time clock by:

sending by the electric power meter a message to the first computing device;

recording, by the electric power meter, first time information from the real time clock representing a first time when the message is transmitted to the first computing device;

receiving, from the first computing device, a response to the message, wherein the response includes second time information representing a second time when the response to the message was transmitted from the first computing device to the electric power meter;

recording, by the electric power meter, third time information from the real time clock representing a third time when the response to the message is received by the electric power meter;

subtracting, by the electric power meter, the first time from the third time to determine a first calculated amount of time that represents an amount of time from when the message was sent from the electric power meter to when the response was received by the electric power meter;

dividing, by the electric power meter, the first calculated amount of time in half to determine a second calculated amount of time representing a transit time between the electric power meter and the first computing device;

adding, by the electric power meter, the second calculated amount of time to the first time to calculate a fourth time;

comparing the fourth time to the second time; and

synchronizing the real time clock based on the comparing.

6. The method of claim 5, wherein the synchronizing includes setting the time in the real time clock if the difference between the fourth time and the second time is more than a predetermined amount.

7. The method of claim 6, further comprising:

generating an alert when the electric power meter determines that the real time clock is to be adjusted based on the comparing; and

transmitting the alert from the electric power meter to the first computing device.

8. The method of claim 5, wherein the second time is local to the location of the electric power meter.

9. The method of claim 5, wherein the first computing device is located on the first data network, and further comprising synchronizing a first clock provided with the first computing device with a second clock provided with a second computing device located on the second data network, prior to synchronizing the real time clock provided with the electric power meter.

10. The method of claim 9, further comprising:

blocking a first port on the at least one firewall to prevent the meter from communicating with any computing device through the first port;

opening a second port on the at least one firewall to allow the first computing device to synchronize the clock provided with the first computing device.

11. The method of claim 1, further comprising calculating a time for transmitting the usage information.

12. The method of claim 11, wherein the calculating the time for transmitting the usage information includes:

determining a report time representing a first amount of time;

determining an offset time representing a second amount of time; and

adding the report time and the offset time to determine the time for transmitting the usage information.

13. The method of claim 12, wherein the determining the report time includes examining a respective byte of the electric power meter'"'"'s media access control address.

14. The method of claim 12, wherein the determining the offset time includes examining a respective byte of the electric power meter'"'"'s media access control address.

15. A method for updating software that executes on an electric power meter that measures and reports power usage of at least one of a plurality of electrical loads connected into an electrical power network, wherein the electric power meter is synchronized to measure power usage at a particular time, and is further configured and operable to communicate over a first data network that is communicatively coupled to a second data network, and further wherein at least one firewall is positioned between the first and second data networks, the method comprising:

transmitting by the electric power meter a first request to a first computing device, wherein the request relates to whether a software update is due;

receiving by the electric power meter a first response to the first request from the first computing device, wherein the first response includes at least one detail for updating the software; and

updating the software as a function of the at least one detail.

16. The method of claim 15, wherein the first request includes at least a first version identification that represents a version of the software that is installed on the electric power meter, and further wherein the at least one detail includes a second version identification of the software that represents another version of the software to be updated on the electric power meter, and yet further wherein the at least one detail includes a time for the electric power meter to download and update the software.

17. The method of claim 16, further comprising:

transmitting, by the electric power meter, a second request to the first computing device for at least one data packet substantially at the time included in the at least one detail;

receiving, from the first computing device and in response to the second request, the at least one data packet;

transmitting by the electric power meter a third request for at least one additional data packet;

receiving, from the first computing device and in response to the third request, the at least one additional data packet;

repeating the transmitting the third request and the receiving the at least one additional data packet until the software update is fully received by the electric power meter; and

installing the updated software in accordance with the at least one detail.

18. The method of claim 15, wherein the software is at least one of a bootloader and firmware.

19. A method for configuring an electric power meter that measures and reports power usage of at least one of a plurality of electrical loads connected into an electrical power network, wherein the electric power meter is synchronized to measure power usage at a particular time, and is further configured and operable to communicate over a first data network that is communicatively coupled to a second data network, and further wherein at least one firewall is positioned between the first and second data networks, the method comprising:

providing a graphical user interface via a first computing device over the second data network, wherein the graphical user interface provides controls for a user to configure the electric power meter to measure power usage at the particular time, and further to configure the electric power meter to request a software upgrade at predetermined time intervals.

20. The method of claim 19, wherein the graphical user interface further provides controls for the user to configure the electric power meter for at least one of:

machine access control address;

firmware version;

Dynamic Host Configuration Protocol;

static Internet protocol address;

current transformer ratio;

power reading frequency;

meter reporting frequency;

communicate via proxy server;

addressing information for the first computing device;

Simple Object Access Protocol configurations; and

time values relative to the electric power meter.

21. The method of claim 20, wherein the time values relative to the electric power meter include the time zone where the electric power meter is located, and settings for defining daylight saving time.

22. The method of claim 19, wherein the graphical user interface further includes controls for testing at least communication associated with the configured meter.

23. The method of claim 22, further comprising receiving a report from the first computing device in response to the testing that represents at least one of current usage, power usage, voltage usage, energy usage at one time, month to date energy usage, year to date energy usage, and energy usage of the life of the meter.

24. A system for updating software that executes on an electric power meter that measures and reports power usage of at least one of a plurality of electrical loads connected into an electrical power network, the system comprising:

a first data network;

a first computing device communicatively coupled to the first data network; and

the electric power meter, wherein the electric power meter is programmed and configured to;

transmit a first request over the first data network to the first computing device, wherein the request relates to whether a software update is due;

receive a first response to the first request from the first computing device, wherein the first response includes at least one detail for updating the software; and

update the software as a function of the at least one detail.

25. The system of claim 24, wherein the first request includes at least a first version identification that represents a version of the software that is installed on the electric power meter, and further wherein the at least one detail includes a second version identification of the software that represents another version of the software to be updated on the electric power meter, and yet further wherein the at least one detail includes a time for the electric power meter to download and update the software.

26. The system of claim 25, wherein the electric power meter is further programmed and configured to:

transmit a second request to the first computing device for at least one data packet substantially at the time included in the at least one detail;

receive, from the first computing device and in response to the second request, the at least one data packet;

transmit a third request for at least one additional data packet;

receive, from the first computing device and in response to the third request, the at least one additional data packet;

repeat the transmitting the third request and the receiving the at least one additional data packet until the software update is fully received by the electric power meter; and

install the updated software in accordance with the at least one detail.

27. The system of claim 24, wherein the software is at least one of a bootloader and firmware.

28. The system of claim 24, wherein the electric power meter is further programmed and configured to be synchronized to measure power usage at a particular time.

29. A system for configuring an electric power meter that measures and reports power usage of at least one of a plurality of electrical loads connected into an electrical power network, the system comprising:

a first data network;

the electric power meter, wherein the electric power meter is synchronized to measure power usage at a particular time;

a computing device that is communicatively coupled to the first data network and at least one other data network; and

a graphical user interface provided via the computing device that includes controls for configuring the electric power meter to measure power usage at the particular time, and further to configure the electric power meter to request a software upgrade at least one predetermined time interval.

30. The system of claim 29, wherein the graphical user interface further provides controls for configuring the electric power meter for at least one of:

machine access control address;

firmware version;

Dynamic Host Configuration Protocol;

static Internet protocol address;

current transformer ratio;

power reading frequency;

meter reporting frequency;

communicate via proxy server;

addressing information for the first computing device;

Simple Object Access Protocol configurations; and

time values relative to the electric power meter.

31. The system of claim 30, wherein the time values relative to the electric power meter include the time zone where the electric power meter is located, and settings for defining daylight saving time.

32. The system of claim 29, wherein the graphical user interface further includes controls for testing at least communication associated with the configured meter.

33. The system of claim 32, further comprising a report provided by the computing device in response to the testing, wherein the report represents at least one of current usage, power usage, voltage usage, energy usage at one time, month to date energy usage, year to date energy usage, and energy usage of the life of the meter.