System for utility demand monitoring and control

• US 5,805,458 A
• Filed: 03/11/1996
• Issued: 09/08/1998
• Est. Priority Date: 08/11/1993
• Status: Expired due to Term

• Current Assignee: Future Technology Incorporated (Advanced Power Electronics Corp.)
• Original Assignee: First Pacific Networks, Inc.
• Inventors: McNamara, Robert P., Amar, Amar Chand
• Primary Examiner(s): Voeltz, Emanuel T.
• Assistant Examiner(s): KEMPER, MELANIE A
• Application Number:
  US08/613,871
• Time in Patent Office: 911 Days
• Field of Search: 364/483, 364/481, 364/492, 364/493, 364/514 C, 340/870.02, 340/870.03, 340/870.07, 340/870.08, 340/870.12, 340/870.13, 340/310.01, 340/310.06, 340/310.08, 370/14, 370/85.6, 370/82, 370/95.1, 370/29, 370/60, 379/106, 379/107, 379/91, 455/4.1, 307/31, 307/38, 307/39
• US Class Current: 702/60
• CPC Class Codes: G08C 15/02 simultaneously, i.e. using frequency division
• CPC Class Codes: H02J 13/00004 characterised by the power network being locally controlled
• CPC Class Codes: H02J 13/00017 using optical fiber
• CPC Class Codes: H02J 13/00034 the elements or equipment being or involving an electric power substation
• CPC Class Codes: H02J 2310/12 The local stationary network supplying a household or a building
• CPC Class Codes: H04L 12/2803 Home automation networks
• CPC Class Codes: H04L 12/2827 Reporting to a device within the home network; wherein the reception of the information reported automatically triggers the execution of a home appliance functionality
• CPC Class Codes: H04L 12/2838 Distribution of signals within a home automation network, e.g. involving splitting/multiplexing signals to/from different paths adaptations of television systems for transmission by electric cable for domestic distribution H04N7/106; hybrid transport H04L12/6418; home network arrangements specially adapted for distribution of digital video signals H04N7/24
• CPC Class Codes: H04L 12/413 with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]
• CPC Class Codes: H04L 2012/285 Generic home appliances, e.g. refrigerators
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y04S 20/20 End-user application control systems

Abstract

A system for electric power demand monitoring and control includes one or more data distribution networks interconnecting intelligent utility units located at customer homes with a host computer located in the utility company offices. Each intelligent utility unit is associated with a customer home for connecting and disconnecting a power service meter, monitoring customer demand, and controlling power to selected units. A network within the home interconnects each intelligent utility unit with power consuming units for providing data on power usage and power control. A data distribution network interconnects the plurality of intelligent utility units to the host computer as a head end unit, the data distribution network providing downstream communication channels from the host computer to the plurality of intelligent utility units and upstream communication channels from the plurality of intelligent utility units to the host computer. The communication channels are organized as frequency division multiplex channels in a frequency spectrum. A plurality of distribution networks can be provided for a larger utility environment with each distribution network associated with a power substation and customers served by the power substation.

Claims

1. A system for utility demand monitoring and control comprising:

a host computer having access to power utility customers for receiving customer utility usage data;

a plurality of network interface means, each network interface means associated with a customer'"'"'s site for relaying customer utility demand as measured by a service meter;

a site network connecting each network interface means with a plurality of utility data collection units within said site for providing data on utility usage to the network interface means associated with the site; and

a distribution network, coupled to said host computer, interconnecting said plurality of network interface means for transmitting utility usage data from said plurality of network interface means to said host computer, said distribution network being implemented within one or more time slots of a time-division multiplexed data stream carried by a high-speed digital bus, said one or more time slots;

carrying data in packet form, all network interface means of said distribution network sharing said one or more slots.

2. The system of claim 1 wherein said single high speed digital bus include voice and data channels, and video channels.

3. The system of claim 1 wherein said high-speed digital bus comprises a combination of a fiber link, a coaxial link, and a wireless link.

4. The system of claim 1 further comprising a digital backbone network for coupling said distribution network and said host computer, said digital backbone network including a Frame Relay T1 interface between said distribution network and said digital backbone network and a Frame Relay router to interface between the digital backbone network and said host computer.

5. The system of claim 1 further comprising a digital backbone network for coupling said distribution network and said host computer, said digital backbone network including an ATM interface between said distribution network and an ATM interface router to interface between the digital backbone network and said host computer.

6. The system of claim 5 and further including a plurality of distribution networks each connecting to a plurality of customer sites, said digital backbone network including a multiplexer for interfacing with said plurality of distribution networks.

7. The system of claim 6 and further including a plurality of distribution networks each running from a power substation to a plurality of customer sites, said digital backbone network including a multiplexer for interfacing with said plurality of distribution networks.

8. The system of claim 1 wherein one of said plurality of data collection units monitors power usage for electrical power consumers within the site.

9. The system of claim 1 wherein said high-speed digital bus comprises a fiber optic link.

11. The system of claim 1 wherein said high-speed digital bus comprises a wireless link.

12. The system of claim 1 wherein said high-speed digital bus employs Carrier Sense Multiple Access/Carrier Detect collision handling protocol.

13. The system of claim 1 wherein one or more, time slots of said time-division multiplexed data stream carry voice data.

14. The system of claim 1 wherein one or more time slots of said time-division multiplexed data stream carry video data.

10. The system of claim l wherein said high-speed digital bus comprises a coaxial link.

15. A distribution network for communicating between a host computer and a plurality of customer sites in an electric power utility demand monitoring and control system, said distribution network comprising:

a plurality of network interface means, each associated with a customer site for relaying customer power demand; and

a digital high-speed bus interconnecting said plurality of network interface means, said digital high-speed bus providing downstream communication channels from said host computer to said plurality of network interface means and upstream communication channels from said plurality of network interface means to said host computer, wherein said downstream communication channels and said upstream communication channels are frequency multiplexed on said digital high-speed bus, and wherein said upstream communication channels and said downstream communication channels are subdivided into time division multiplexed subchannels, one or more of said subchannels carrying data in packet form within one or more time division slots shared by all of said network interface means.

16. The distribution network of claim 15 wherein said high-speed digital bus comprises a coaxial cable.

17. The distribution network of claim 15 wherein said high-speed digital bus comprises a fiber cable.

18. The distribution network of claim 15 wherein said high-speed digital bus comprises a wireless link.

19. The distribution network of claim 15 wherein said high-speed digital bus comprises a twisted pair.

20. The distribution network of claim 15 wherein said upstream and downstream communications channels employ packet Carrier Sense Multiple Access/Carrier Detect collision handling protocol.

21. The distribution network of claim 15 wherein one or more of said time-division multiplexed subchannels carry voice data.

22. The distribution network of claim 15 wherein one or more of said time-division multiplexed subchannels carry video data.