ES2524517B2 - Differential earth fault detection method and system in insulated DC cables - Google Patents

Differential earth fault detection method and system in insulated DC cables Download PDF

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Publication number
ES2524517B2
ES2524517B2 ES201431014A ES201431014A ES2524517B2 ES 2524517 B2 ES2524517 B2 ES 2524517B2 ES 201431014 A ES201431014 A ES 201431014A ES 201431014 A ES201431014 A ES 201431014A ES 2524517 B2 ES2524517 B2 ES 2524517B2
Authority
ES
Spain
Prior art keywords
cable
cables
intensities
insulated
ground
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.)
Active
Application number
ES201431014A
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Spanish (es)
Other versions
ES2524517A1 (en
Inventor
Ricardo Granizo Arrabé
Carlos Antonio Platero Gaona
Francisco BLÁNQUEZ DELGADO
Emilio Rebollo López
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.)
Universidad Politecnica de Madrid
Original Assignee
Universidad Politecnica de Madrid
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.)
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Publication date
Application filed by Universidad Politecnica de Madrid filed Critical Universidad Politecnica de Madrid
Priority to ES201431014A priority Critical patent/ES2524517B2/en
Publication of ES2524517A1 publication Critical patent/ES2524517A1/en
Application granted granted Critical
Publication of ES2524517B2 publication Critical patent/ES2524517B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H02H7/26—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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58—Testing of lines, cables or conductors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

La presente invención se refiere a un nuevo método y sistema de detección selectiva de defectos a tierra en cables de corriente continua que tienen sus pantallas conectadas a tierra en sus dos extremos.#Se identifica el cable que tiene un defecto a tierra al medir intensidad de defecto en los extremos de las dos pantallas del cable. Estas dos intensidades tienen polaridades contrarias si el cable no presenta fallo alguno. En cambio, si el cable tiene defecto, las dos intensidades tienen sentidos iguales. También se identifica el cable con defecto a tierra al medir y comparar las intensidades que circulan por los dos extremos de la pantalla del cable protegido.#Esta invención es capaz de discriminar entre las intensidades correspondientes a las maniobras de conexión de los cables protegidos y las correspondientes a los defectos a tierra de los mismos evitando así disparos erróneos o indebidos.The present invention relates to a new method and system for the selective detection of ground faults in DC cables that have their screens connected to the ground at both ends. # The cable that has a ground fault is identified by measuring the intensity of defect at the ends of the two cable screens. These two intensities have opposite polarities if the cable has no fault. On the other hand, if the cable has a defect, the two intensities have equal senses. The ground fault cable is also identified by measuring and comparing the currents that circulate at the two ends of the shield of the protected cable. # This invention is able to discriminate between the intensities corresponding to the connection maneuvers of the protected cables and the corresponding to the earth defects thereof thus avoiding erroneous or improper firing.

Description



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Claims (1)



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ES201431014A 2014-07-07 2014-07-07 Differential earth fault detection method and system in insulated DC cables Active ES2524517B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES201431014A ES2524517B2 (en) 2014-07-07 2014-07-07 Differential earth fault detection method and system in insulated DC cables

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201431014A ES2524517B2 (en) 2014-07-07 2014-07-07 Differential earth fault detection method and system in insulated DC cables

Publications (2)

Publication Number Publication Date
ES2524517A1 ES2524517A1 (en) 2014-12-09
ES2524517B2 true ES2524517B2 (en) 2015-05-12

Family

ID=52003455

Family Applications (1)

Application Number Title Priority Date Filing Date
ES201431014A Active ES2524517B2 (en) 2014-07-07 2014-07-07 Differential earth fault detection method and system in insulated DC cables

Country Status (1)

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ES (1) ES2524517B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020074128A1 (en) * 2018-10-09 2020-04-16 Airbus Operations (S.A.S.) Aircraft comprising an electrical installation using a high-voltage direct-current
CN110176748B (en) * 2019-05-29 2021-09-03 新里程医用加速器(无锡)有限公司 Protection ring control system of medical accelerator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1104245A (en) * 1954-05-25 1955-11-17 Thomson Houston Comp Francaise Improvements to electrical protection devices
JPH0197129A (en) * 1987-10-08 1989-04-14 Toshiba Corp Protection method for power distribution system of isolated neutral type
DE4416966C2 (en) * 1994-05-13 1998-05-14 Pfisterer Elektrotech Karl Circuit arrangement for determining an earth fault in a power transmission cable
FR2783926B1 (en) * 1998-09-28 2001-10-19 Socrat METHOD AND DEVICE FOR LOCATING A CABLE ISOLATION DEFECT

Also Published As

Publication number Publication date
ES2524517A1 (en) 2014-12-09

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