Apparatus and system for protection, control, and management of electricity distribution systems over a network

• US 20030212512A1
• Filed: 10/15/2002
• Published: 11/13/2003
• Est. Priority Date: 02/12/1997
• Status: Abandoned Application

• Current Assignee: Power Measurement Ltd. (Schneider Electric SE)
• Original Assignee: Power Measurement Ltd. (Schneider Electric SE)
• Inventors: Hart, Ronald G.
• Application Number:
  US10/271,368
• Publication Number:
  US 20030212512A1
• Time in Patent Office: Days
• US Class Current: 702/57
• CPC Class Codes: G01D 4/004 Remote reading of utility meters to a fixed location
• CPC Class Codes: G01R 19/2513 Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging
• CPC Class Codes: G01R 22/10 using digital techniques
• CPC Class Codes: H02H 1/0061 concerning transmission of signals transmission of measured quantities or switching orders; sectionalised protection involving signal transmission between at least two stations H02H7/261; comparison of the voltage or current values at two spaced portions of a single system H02H3/28; transferring the output of a sensing member to another variable G01D5/00; electrical measuring arrangements using modulation of electromagnetic waves, e.g. light beams G01R15/24, G01R15/26
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks
• 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: Y02E 40/70 Smart grids as climate change mitigation technology in the energy generation sector
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02P 80/10 Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
• CPC Class Codes: Y04S 10/00 Systems supporting electrical power generation, transmission or distribution
• CPC Class Codes: Y04S 10/22 Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
• CPC Class Codes: Y04S 20/30 Smart metering, e.g. specially adapted for remote reading

Abstract

A phasor monitoring system and apparatus for use with a distribution system for electricity wherein periodic three phase electricity is distributed in a plurality of circuits. The phasor monitoring apparatus comprises a phasor transducer that has an input that receives analog signals representative of parameters of electricity in a circuit of the distribution system, an analog to digital converter that receives the analog signals and outputs a digital data signal representative of the analog signals, a processor coupled to the analog to digital converter to receive the digital data signal output from the analog to digital converter, programming on the processor that computes phasor data representative of the electricity in the circuit based on the digital data received from the analog to digital converter and provides a digital output representative of the phasor data, and a network-compatible port coupled to the processor to transmit the phasor data onto a data network coupled thereto. The phasor monitoring system comprises a data network interconnecting a plurality of phasor transducers each associated with one of the circuits of an electricity distribution system. A phasor array processor is connected to the data network and receives phasor data from a plurality of the phasor transducers connected to the network. The phasor array processor computes combined phasor data for the plurality based upon the phasor data received from the plurality of phasor transducers.

Claims

1. A system for measuring the delivery of electrical energy from an energy supplier to a consumer through an electric circuit, said system comprising:

a digital network;

at least first and second devices coupled with said digital network, said first and second devices each comprising;

at least one sensor coupled with said electric circuit and operative to sense at least one power parameter in said electric circuit and generate at least one analog signal indicative thereof;

at least one analog to digital converter coupled with said at least one sensor and operative to convert said at least one analog signal to at least one digital signal representative thereof;

a first processor coupled with said at least one analog to digital converter and operative to generate at least one computed value from said at least one digital signal; and

a plurality of communication ports, each of said communication ports operative to receive input and transmit said input to said first processor, said communication ports being coupled with said digital network, wherein said device is operative to engage in a plurality of substantially simultaneous communications from said communication ports;

whereby said first device communicates with at least said second device over said digital network.

2. The system of claim 1, wherein at least one of said first and second devices further comprises a local synchronization circuit coupled with said processor which outputs a timing clock signal to said processor.

3. The system of claim 1, said first device further comprising a communications module, said communications module operative to allow a device coupled to the digital network to communicate with said processor of said first device.

4. The system of claim 1, whereby said first device communicates with at least said second device over said digital network substantially in real time.

5. The system of claim 1, wherein said plurality of communication ports comprises at least one Ethernet port.

6. The system of claim 1, wherein said plurality of communication ports comprises at least two RS232 ports.

7. The system of claim 1, wherein said plurality of communication ports comprises at least two RS485 ports.

8. The system of claim 1, wherein said plurality of communication ports comprises at least one Ethernet port and at least one of a RS232 port and a RS485 port.

9. The system of claim 1, wherein each of said plurality of communications ports comprises at least one communications parameter, said at least one communications parameter of a first of said plurality of communications ports is configurable independent of a configuration of said at least one communications parameter of a second of said plurality of communications ports.

10. The system of claim 9, wherein said at least communications parameter comprises a baud-rate.

11. The system of claim 9, wherein said at least one communications parameter comprises a communications protocol.

12. The system of claim 9, wherein said at least one communications parameter comprises a physical communication mode, said physical communication mode further comprising at least one of RS232 and RS485.

13. The system of claim 9, wherein said at least one communications parameter comprises a RTS level.

14. The system of claim 9, wherein said at least one communications parameter comprises a CTS level.

15. The system of claim 9, wherein said at least one communications parameter comprises a RTS delay.

16. The system of claim 9, wherein said at least one communications parameter comprises a transmission delay.

17. The system of claim 9, wherein said at least one communications parameter comprises a unit identifier.

18. The system of claim 1, wherein at least one of said plurality of communications ports is coupled with a second processor, said second processor further coupled with said first processor.

19. The system of claim 18, wherein said second processor comprises a communications processor.

20. The system of claim 1, wherein the said first processor comprises a communications processor.

21. A method for measuring the delivery of electrical energy from an energy supplier to a consumer through an electric circuit using a digital network, said method comprising:

(a) sensing, by at least first and second devices coupled with said electric circuit, at least one power parameter in said electric circuit and generating at least one analog signal indicative thereof;

(b) converting said at least one analog signal to at least one digital signal representative thereof;

(c) generating at least one computed value from said at least one digital signal; and

(d) receiving input from said digital network and processing said input;

(e) engaging in a plurality of substantially simultaneous communications over said digital network, wherein at least one of said substantially simultaneous communications comprises at least one communication between said first and second devices.

22. The method of claim 21 further comprising:

(f) Receiving a time synchronization request by at least one of said first device and said second device.

23. The method of claim 21 further comprising:

(f) Transmitting a time synchronization request by at least one of said first device and said second device.

24. A system for measuring the delivery of electrical energy from an energy supplier to a consumer through an electric circuit, said system comprising:

a digital network;

at least first and second devices coupled with said digital network, said first and second devices each comprising;

sensing means for sensing at least one power parameter in said electric circuit and generating at least one analog signal indicative thereof;

converting means for converting said at least one analog signal to at least one digital signal representative thereof;

processing means for generating at least one computed value from said at least one digital signal; and

communicating means for receiving input from said digital network and transmitting said input to said processing means, wherein said device is operative to engage in a plurality of substantially simultaneous communications using said communicating means;

whereby said first device communicates with at least said second device over said digital network.