ES419728A1 - Process and apparatus for impedance protection of an electrical transmission line - Google Patents

Process and apparatus for impedance protection of an electrical transmission line

Info

Publication number
ES419728A1
ES419728A1 ES419728A ES419728A ES419728A1 ES 419728 A1 ES419728 A1 ES 419728A1 ES 419728 A ES419728 A ES 419728A ES 419728 A ES419728 A ES 419728A ES 419728 A1 ES419728 A1 ES 419728A1
Authority
ES
Spain
Prior art keywords
quadrilateral
transmission line
impedance
electrical transmission
procedure
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
ES419728A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CONTROLE ET D EQUIPEMENT SOC I
Original Assignee
CONTROLE ET D EQUIPEMENT SOC I
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 by CONTROLE ET D EQUIPEMENT SOC I filed Critical CONTROLE ET D EQUIPEMENT SOC I
Publication of ES419728A1 publication Critical patent/ES419728A1/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • 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
    • H02H3/38—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 both voltage and current; responsive to phase angle between voltage and current
    • H02H3/382—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 both voltage and current; responsive to phase angle between voltage and current involving phase comparison between current and voltage or between values derived from current and voltage

Abstract

Procedure and device for measuring minimum angle impedance and minimum reactance for distance protection for an electric power transmission line, whose procedure is developed according to a quadrilateral impedance characteristic, consisting of elaborating for each side of the quadrilateral, two vector quantities, one of which is obtained with the help of an operational amplifier, and in comparing the phases of these two quantities in a phase comparator that provides two states according to the position of the point, based on an intensity and an input voltage representative of the impedance relative to the side of the quadrilateral. (Machine-translation by Google Translate, not legally binding)
ES419728A 1972-10-17 1973-10-17 Process and apparatus for impedance protection of an electrical transmission line Expired ES419728A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7236705A FR2203080B1 (en) 1972-10-17 1972-10-17

Publications (1)

Publication Number Publication Date
ES419728A1 true ES419728A1 (en) 1976-03-01

Family

ID=9105755

Family Applications (1)

Application Number Title Priority Date Filing Date
ES419728A Expired ES419728A1 (en) 1972-10-17 1973-10-17 Process and apparatus for impedance protection of an electrical transmission line

Country Status (6)

Country Link
CH (1) CH575673A5 (en)
DE (1) DE2351872C3 (en)
ES (1) ES419728A1 (en)
FR (1) FR2203080B1 (en)
GB (1) GB1444774A (en)
SE (1) SE406998B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH600644A5 (en) * 1975-06-19 1978-06-30 Bbc Brown Boveri & Cie
CH613570A5 (en) * 1976-03-25 1979-09-28 Bbc Brown Boveri & Cie
CH618294A5 (en) * 1977-09-06 1980-07-15 Bbc Brown Boveri & Cie
SE418035B (en) * 1979-08-30 1981-04-27 Asea Ab IMPEDANCING DEVICE IN IMPEDANCE PROTECTION
AT386702B (en) * 1985-03-07 1988-10-10 Elin Union Ag Electronic overcurrent relay with phase-angle-dependent sensitivity switching
US4667186A (en) * 1985-03-13 1987-05-19 Raychem Corporation Phase difference fault detector

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1096279A (en) * 1964-04-28 1967-12-20 English Electric Co Ltd Protective relays
DE1302257C2 (en) * 1964-06-19 1973-01-25 Hartmann & Braun Ag MEASUREMENT CIRCUIT FOR ELECTRONIC RELAYS
FR1566498A (en) * 1968-03-11 1969-05-09

Also Published As

Publication number Publication date
CH575673A5 (en) 1976-05-14
DE2351872C3 (en) 1981-02-12
DE2351872B2 (en) 1980-06-04
DE2351872A1 (en) 1974-04-18
FR2203080A1 (en) 1974-05-10
FR2203080B1 (en) 1977-08-26
GB1444774A (en) 1976-08-04
SE406998B (en) 1979-03-05

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