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GB1297628A - - Google Patents

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Publication number
GB1297628A
GB1297628A GB1297628DA GB1297628A GB 1297628 A GB1297628 A GB 1297628A GB 1297628D A GB1297628D A GB 1297628DA GB 1297628 A GB1297628 A GB 1297628A
Authority
GB
United Kingdom
Prior art keywords
signals
rate
change
output
differentiating circuit
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.)
Expired
Application number
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1297628A publication Critical patent/GB1297628A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H02H3/44—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 the rate of change of electrical quantities
    • H02H3/445—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 the rate of change of electrical quantities of DC quantities
    • 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
    • H02H7/268—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 for DC systems

Landscapes

  • Dc Digital Transmission (AREA)

Abstract

1297628 Protective arrangements; HVDC transmission systems ENGLISH ELECTRIC CO Ltd 19 May 1970 [20 May 1969] 25706/69 Headings H2F and H2K A fault detecting arrangement for a D.C. transmission line comprises means for producing respective output signals when the rate of change of the line current and the rate of change of the line voltage exceed predetermined levels, and a detector responsive to coincidence between the signals to provide an output for effecting an alarm or control function. As shown, current transformer 6 is connected to differentiating circuit 8 and a level detector 9. A voltage signal, e.g. from a resistive or capacitative voltage divider (not shown), is applied to a differentiating circuit 4 and level detector 5. An AND gate 10 provides an output when logic signals from the detectors are coincident. The polarities of the rate of change signals are determined by the function of the adjacent converter station 1, 2.
GB1297628D 1969-05-20 1969-05-20 Expired GB1297628A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2570669 1969-05-20

Publications (1)

Publication Number Publication Date
GB1297628A true GB1297628A (en) 1972-11-29

Family

ID=10231979

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1297628D Expired GB1297628A (en) 1969-05-20 1969-05-20

Country Status (1)

Country Link
GB (1) GB1297628A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011141052A1 (en) * 2010-05-11 2011-11-17 Abb Technology Ag A plant for transmitting high voltage dc electric power including overvoltage protection
WO2011157305A1 (en) * 2010-06-14 2011-12-22 Abb Research Ltd Fault protection of hvdc transmission lines
WO2013127438A1 (en) 2012-02-28 2013-09-06 Abb Technology Ltd A method and an apparatus for detecting a fault in an hvdc power transmission system
CN112345882A (en) * 2020-10-14 2021-02-09 云南电网有限责任公司文山供电局 Rapid fault detection method based on fuzzy inference system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011141052A1 (en) * 2010-05-11 2011-11-17 Abb Technology Ag A plant for transmitting high voltage dc electric power including overvoltage protection
WO2011157305A1 (en) * 2010-06-14 2011-12-22 Abb Research Ltd Fault protection of hvdc transmission lines
CN103004048A (en) * 2010-06-14 2013-03-27 Abb研究有限公司 Fault Protection for HVDC Transmission Lines
US8749933B2 (en) 2010-06-14 2014-06-10 Abb Research Ltd Fault protection of HVDC transmission lines
CN103004048B (en) * 2010-06-14 2015-04-15 Abb研究有限公司 Fault protection of HVDC transmission lines
WO2013127438A1 (en) 2012-02-28 2013-09-06 Abb Technology Ltd A method and an apparatus for detecting a fault in an hvdc power transmission system
CN112345882A (en) * 2020-10-14 2021-02-09 云南电网有限责任公司文山供电局 Rapid fault detection method based on fuzzy inference system
CN112345882B (en) * 2020-10-14 2022-10-11 云南电网有限责任公司文山供电局 Rapid fault detection method based on fuzzy inference system

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee