FR2224909A1 - Super or hyper conductive element protection - detects phase angle variations between current and voltage - Google Patents

Super or hyper conductive element protection - detects phase angle variations between current and voltage

Info

Publication number
FR2224909A1
FR2224909A1 FR7311978A FR7311978A FR2224909A1 FR 2224909 A1 FR2224909 A1 FR 2224909A1 FR 7311978 A FR7311978 A FR 7311978A FR 7311978 A FR7311978 A FR 7311978A FR 2224909 A1 FR2224909 A1 FR 2224909A1
Authority
FR
France
Prior art keywords
voltage
current
hyper
super
phase angle
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
FR7311978A
Other languages
French (fr)
Other versions
FR2224909B3 (en
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.)
Compagnie Electro Mecanique SA
Original Assignee
Compagnie Electro Mecanique SA
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 Compagnie Electro Mecanique SA filed Critical Compagnie Electro Mecanique SA
Priority to FR7311978A priority Critical patent/FR2224909A1/en
Publication of FR2224909A1 publication Critical patent/FR2224909A1/en
Application granted granted Critical
Publication of FR2224909B3 publication Critical patent/FR2224909B3/fr
Granted legal-status Critical Current

Links

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
    • H02H7/001—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 superconducting apparatus, e.g. coils, lines, machines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

A change of the element (1) resistance is detected by the change of phase which an a.c. current produces. A voltage, proportional to the voltage drop in the element, is one input (E1) of the detector. The second input (E2) is proportional to the voltage developed across an inductively coupled coil (1a) but phase shifted by 180 deg. The second input can also be provided by the voltage drop of a series resistor with the element. The detector itself is a saturated differential amplifier (10) producing two equal pulse trains when in equilibrium. The output operates the current trip (5).
FR7311978A 1973-04-03 1973-04-03 Super or hyper conductive element protection - detects phase angle variations between current and voltage Granted FR2224909A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7311978A FR2224909A1 (en) 1973-04-03 1973-04-03 Super or hyper conductive element protection - detects phase angle variations between current and voltage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7311978A FR2224909A1 (en) 1973-04-03 1973-04-03 Super or hyper conductive element protection - detects phase angle variations between current and voltage

Publications (2)

Publication Number Publication Date
FR2224909A1 true FR2224909A1 (en) 1974-10-31
FR2224909B3 FR2224909B3 (en) 1976-03-26

Family

ID=9117341

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7311978A Granted FR2224909A1 (en) 1973-04-03 1973-04-03 Super or hyper conductive element protection - detects phase angle variations between current and voltage

Country Status (1)

Country Link
FR (1) FR2224909A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0205924A2 (en) * 1985-05-20 1986-12-30 Kabushiki Kaisha Toshiba Monitoring system for detecting quench of superconductive coils
EP0285513A1 (en) * 1987-03-30 1988-10-05 Gec Alsthom Sa Devices for the detection of the transition into the normal state of a supraconducting winding, in particular of an electric generator, and for protecting such a winding
FR2930349A1 (en) * 2008-04-16 2009-10-23 Areva T & D Sa METHOD AND SYSTEM FOR DETECTING RESIDUAL SECONDARY CURRENT IN A CURRENT TRANSFORMER IN A HIGH VOLTAGE ELECTRICAL NETWORK, AND METHOD AND SYSTEM FOR DETECTING ARC FORMATION IN A CIRCUIT BREAKER

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0205924A2 (en) * 1985-05-20 1986-12-30 Kabushiki Kaisha Toshiba Monitoring system for detecting quench of superconductive coils
EP0205924A3 (en) * 1985-05-20 1988-04-06 Kabushiki Kaisha Toshiba Monitoring system for detecting quench of superconductive coils
EP0285513A1 (en) * 1987-03-30 1988-10-05 Gec Alsthom Sa Devices for the detection of the transition into the normal state of a supraconducting winding, in particular of an electric generator, and for protecting such a winding
FR2613493A1 (en) * 1987-03-30 1988-10-07 Alsthom DEVICES FOR DETECTING TRANSITIONS TO THE NORMAL STATE IN A SUPERCONDUCTING WINDOW, IN PARTICULAR AN ELECTRIC GENERATOR, AND FOR PROTECTING SUCH WINDING
US4855859A (en) * 1987-03-30 1989-08-08 Societe Anonyme Dite Alsthom Detection device for detecting transitions to the normal state in a superconducting winding, in particular for generating electricity, and a protection device for protecting such a winding
FR2930349A1 (en) * 2008-04-16 2009-10-23 Areva T & D Sa METHOD AND SYSTEM FOR DETECTING RESIDUAL SECONDARY CURRENT IN A CURRENT TRANSFORMER IN A HIGH VOLTAGE ELECTRICAL NETWORK, AND METHOD AND SYSTEM FOR DETECTING ARC FORMATION IN A CIRCUIT BREAKER
WO2009144083A1 (en) * 2008-04-16 2009-12-03 Areva T&D Sas Method and system for detecting residual secondary current in current transformer in high tension electrical network, and for detecting arc formation in circuit breaker

Also Published As

Publication number Publication date
FR2224909B3 (en) 1976-03-26

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Legal Events

Date Code Title Description
ST Notification of lapse