CA2470630A1 - Determining an operational limit of a power transmission line - Google Patents

Determining an operational limit of a power transmission line Download PDF

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Publication number
CA2470630A1
CA2470630A1 CA002470630A CA2470630A CA2470630A1 CA 2470630 A1 CA2470630 A1 CA 2470630A1 CA 002470630 A CA002470630 A CA 002470630A CA 2470630 A CA2470630 A CA 2470630A CA 2470630 A1 CA2470630 A1 CA 2470630A1
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CA
Canada
Prior art keywords
line
determining
computing
temperature
average
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Granted
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CA002470630A
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French (fr)
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CA2470630C (en
Inventor
Marek Zima
Christian Rehtanz
Mats Larsson
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ABB Schweiz AG
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Publication of CA2470630A1 publication Critical patent/CA2470630A1/en
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Publication of CA2470630C publication Critical patent/CA2470630C/en
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Classifications

    • 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
    • H02H7/22—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 for distribution gear, e.g. bus-bar systems; for switching devices
    • H02H7/226—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 for distribution gear, e.g. bus-bar systems; for switching devices for wires or cables, e.g. heating wires
    • 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
    • H02H3/40—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 responsive to ratio of voltage and current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H6/00—Emergency protective circuit arrangements responsive to undesired changes from normal non-electric working conditions using simulators of the apparatus being protected, e.g. using thermal images
    • H02H6/005—Emergency protective circuit arrangements responsive to undesired changes from normal non-electric working conditions using simulators of the apparatus being protected, e.g. using thermal images using digital thermal images

Landscapes

  • Supply And Distribution Of Alternating Current (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Hybrid Cells (AREA)
  • Air Bags (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Transmitters (AREA)

Abstract

In a method, computer program and system for determining an operational limi t of a power transmission line, time-stamped current phasor information and voltage phasor information for a first end and a second end of the line are determined, an ohmic resistance of the line is computed from the phasor information, and an average line temperature is computed from the ohmic resistance. This allows to determine the average line temperature without dedicated temperature sensors. The average line temperature represents the actual average temperature and is largely independent of assumptions regardi ng line parameters.

Claims (7)

1. A method for determining an operational limit of a power transmission line, comprising the steps of , ~ determining time-stamped current phasor information and voltage phasor information for a first end and a second end of the line, ~ computing an ohmic resistance R of the line from the phasor information, ~ computing an average line temperature T1 from the ohmic resistance R.
2. The method according to claim 1, comprising the step of controlling a power flow through the line such that the average line temperature T1 does not exceed a given maximum average line temperature Tmax.
3. The method according to claim 1, comprising the steps of computing actual electrical parameters (R, XL, Xc) of the line and computing, from the actual electrical line parameters, a maximum load Smax that is deliverable by the line.
4. The method according to claim 3, comprising the step of controlling a power flow through the line such that an actual power s delivered by the line does not exceed the maximum load Smax.
5. The method according to claim 4, wherein the step of controlling power the flow through the line ensures that the average line temperature T1 does not exceed a given maximum average line temperature T max.
6. A computer program for determining an operational limit of a power transmission line loadable into an internal memory of a digital computer, comprising computer program code means to make, when said program is loaded in the computer, the computer execute the method according to one of the preceding claims.
7. A system determining an operational limit of a power transmission line, characterized in that the system comprises a data processing device and means for .cndot. determining time-stamped current phasor information and voltage phasor for a first end and a second end of the line, .cndot. computing an ohmic resistance R of the line from the phasor information, .cndot. computing an average line temperature T1 from the ohmic resistance R.
CA2470630A 2001-12-21 2002-12-11 Determining an operational limit of a power transmission line Expired - Fee Related CA2470630C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP01811254.0 2001-12-21
EP01811254A EP1324454B1 (en) 2001-12-21 2001-12-21 Determining an operational limit of a power transmission line
PCT/CH2002/000682 WO2003055028A1 (en) 2001-12-21 2002-12-11 Determining an operational limit of a power transmission line

Publications (2)

Publication Number Publication Date
CA2470630A1 true CA2470630A1 (en) 2003-07-03
CA2470630C CA2470630C (en) 2012-03-13

Family

ID=8184332

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2470630A Expired - Fee Related CA2470630C (en) 2001-12-21 2002-12-11 Determining an operational limit of a power transmission line

Country Status (8)

Country Link
US (2) US7107162B2 (en)
EP (1) EP1324454B1 (en)
AT (1) ATE326073T1 (en)
AU (1) AU2002366845A1 (en)
BR (1) BR0215234A (en)
CA (1) CA2470630C (en)
DE (1) DE60119555T2 (en)
WO (1) WO2003055028A1 (en)

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Also Published As

Publication number Publication date
EP1324454A1 (en) 2003-07-02
EP1324454B1 (en) 2006-05-10
DE60119555D1 (en) 2006-06-14
AU2002366845A1 (en) 2003-07-09
WO2003055028A1 (en) 2003-07-03
BR0215234A (en) 2004-11-16
US20070038396A1 (en) 2007-02-15
DE60119555T2 (en) 2007-03-08
ATE326073T1 (en) 2006-06-15
US7107162B2 (en) 2006-09-12
US20050222808A1 (en) 2005-10-06
CA2470630C (en) 2012-03-13

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