CA2326434A1 - Distributed logic in multiple protective relays - Google Patents

Distributed logic in multiple protective relays Download PDF

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Publication number
CA2326434A1
CA2326434A1 CA002326434A CA2326434A CA2326434A1 CA 2326434 A1 CA2326434 A1 CA 2326434A1 CA 002326434 A CA002326434 A CA 002326434A CA 2326434 A CA2326434 A CA 2326434A CA 2326434 A1 CA2326434 A1 CA 2326434A1
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CA
Canada
Prior art keywords
peer
relay
logic
protective
communications network
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002326434A
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French (fr)
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CA2326434C (en
Inventor
Colin Bruce Campbell
Roger Moore
Andrew W. Baigent
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General Electric Co
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Individual
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Publication date
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Publication of CA2326434A1 publication Critical patent/CA2326434A1/en
Application granted granted Critical
Publication of CA2326434C publication Critical patent/CA2326434C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/006—Calibration or setting of parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Small-Scale Networks (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Radio Relay Systems (AREA)
  • Computer And Data Communications (AREA)

Abstract

A protective relay, system, and relay operation method which allows logic functions to be distributed amongst multiple protective relays associated with a power distribution system. The protective relays include communications ports for exchanging messages over a peer-to-peer communications network, and include programmable logic. Each protective relay receives logic operands contained in the messages from remote protective relays, executes logic equations using the received operands, provides protective control if needed, and outputs operands to other protective relays.

Claims (18)

1. A power control and monitoring system, comprising:
an electrical power distribution network;
a plurality of digital protective relays, each digital protective relay associated with one or more points on the electrical power distribution network, and each digital protective relay including a communications port for connection to a peer-to-peer communications network, wherein each digital protective relay includes user-programmable logic, and wherein logic inputs and outputs are communicated between the plurality of digital protective relays over the peer-to-peer communications network.
2. The system of claim 1, wherein the peer-to-peer communications network is an ethernet network, and wherein logic input data and logic output data are communicated between the plurality of digital protective relays according to the Electric Power Research Institute UCA 2.0 format.
3. The system of claim 1, wherein the user-programmable logic circuitry uses postfix notation.
4. The system of claim 1, wherein each digital protective relay is programmed to receive messages on the peer-to-peer communications network from certain ones of the plurality of digital protective relays.
5. The system of claim 4, wherein the digital relay is programmed by providing unique identifiers associated with the certain ones of the plurality of digital protective relays to each protective relay.
6. The system of claim 2, wherein logic data is communicated in the form of messages, each message including a unique identifier identifying the protective relay originating the message, and one or more remote inputs for use in the user-programmable logic circuitry.
7. The system of claim 6, wherein the remote inputs are operands for the logic equations.
8. A digital protective relay, comprising:
connection elements for connection to an electrical distribution system;
at least one communication port for connection to a peer-to-peer communication network;
an input for receiving logic instructions from a user; and programmable logic for executing user-supplied logic instructions, wherein network messages containing logic inputs and outputs are communicated between a plurality of digital protective relays over the peer-to-peer communications network.
9. The relay of claim 8, wherein the peer-to-peer communications network is an ethernet network, and wherein the logic inputs and outputs are communicated according to the Electric Power Research Institute (EPRI) UCA 2.0 format.
10. The relay of claim 8, wherein the programmable logic is programmable using postfix notation.
11. The relay of claim 8, wherein the relay is programmed to receive messages on the peer-to-peer communications network from certain ones of the plurality of digital protective relays.
12. The relay of claim 11, wherein the relay is programmed by providing unique identifiers associated with the certain ones of the plurality of digital protective relays to each protective relay.
13. The system of claim 9, wherein logic data is communicated in the form of messages, each message including a unique identifier identifying the protective relay originating the message, and one or more remote inputs or outputs for use in the user-programmable logic circuitry.
14. The system of claim 13, wherein the remote inputs or outputs are operands for the logic equations.
15. A method for providing protective control of a power distribution system in a protective relay, the method comprising:
capturing at least one input message from a peer-to-peer communications network, each input message identifying a remote protective relay;
extracting operands from the at least one message;
executing user-programmable logic equations using the extracted operands to determine whether the protective relay is to perform a protective relay function; and outputting at least one output message to the peer-to-peer communications network, each output message identifying the protective relay and including one or more operands.
16. The method of claim 15, further comprising the step of monitoring the peer-to-peer communications network for messages from particular ones of a plurality of remote protective relays, prior to the step of capturing.
17. The method of claim 15, wherein the peer-to-peer communications network is an ethernet network.
18. The method of claim 15, wherein each message is in the Electric Power Research Institute UCA 2.0 format.
CA2326434A 1999-02-12 2000-02-11 Distributed logic in multiple protective relays Expired - Fee Related CA2326434C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/249,551 US6469629B1 (en) 1999-02-12 1999-02-12 Distributed logic in multiple protective relays
US09/249,551 1999-02-12
PCT/US2000/003402 WO2000048281A2 (en) 1999-02-12 2000-02-11 Distributed logic in multiple protective relays

Publications (2)

Publication Number Publication Date
CA2326434A1 true CA2326434A1 (en) 2000-08-17
CA2326434C CA2326434C (en) 2012-01-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2326434A Expired - Fee Related CA2326434C (en) 1999-02-12 2000-02-11 Distributed logic in multiple protective relays

Country Status (12)

Country Link
US (1) US6469629B1 (en)
EP (1) EP1078430A2 (en)
JP (1) JP4345078B2 (en)
KR (1) KR100688754B1 (en)
CN (1) CN1311601C (en)
AU (1) AU760320B2 (en)
BR (1) BR0004793A (en)
CA (1) CA2326434C (en)
MX (1) MXPA00009929A (en)
PL (1) PL200548B1 (en)
WO (1) WO2000048281A2 (en)
ZA (1) ZA200005158B (en)

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CN102355054A (en) * 2011-08-26 2012-02-15 任建福 Local self-healing protection method of distribution network automation
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Also Published As

Publication number Publication date
MXPA00009929A (en) 2003-07-14
EP1078430A2 (en) 2001-02-28
AU3857100A (en) 2000-08-29
PL200548B1 (en) 2009-01-30
ZA200005158B (en) 2002-01-02
BR0004793A (en) 2001-10-30
CA2326434C (en) 2012-01-24
CN1311601C (en) 2007-04-18
US6469629B1 (en) 2002-10-22
KR20010071140A (en) 2001-07-28
CN1300456A (en) 2001-06-20
WO2000048281A2 (en) 2000-08-17
AU760320B2 (en) 2003-05-15
JP4345078B2 (en) 2009-10-14
WO2000048281A3 (en) 2000-12-14
KR100688754B1 (en) 2007-02-28
WO2000048281A9 (en) 2001-09-13
PL344572A1 (en) 2001-11-05
JP2002537745A (en) 2002-11-05

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Effective date: 20180212