EP0723278A1 - Hochspannungsstromzuführung zwischen einer supraleitenden Anordnung bei kritischer Tieftemperatur und einem Hochspannungskabelanschlussende auf Umgebungstemperatur - Google Patents

Hochspannungsstromzuführung zwischen einer supraleitenden Anordnung bei kritischer Tieftemperatur und einem Hochspannungskabelanschlussende auf Umgebungstemperatur

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Publication number
EP0723278A1
EP0723278A1 EP96400092A EP96400092A EP0723278A1 EP 0723278 A1 EP0723278 A1 EP 0723278A1 EP 96400092 A EP96400092 A EP 96400092A EP 96400092 A EP96400092 A EP 96400092A EP 0723278 A1 EP0723278 A1 EP 0723278A1
Authority
EP
European Patent Office
Prior art keywords
critical temperature
metal
superconductive
temperature
supply
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.)
Withdrawn
Application number
EP96400092A
Other languages
English (en)
French (fr)
Inventor
Christian Cottevieille
Peter Friedrich Herrmann
Albert Leriche
Michel Quemener
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.)
Alstom SA
Original Assignee
GEC Alsthom Electromecanique 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 GEC Alsthom Electromecanique SA filed Critical GEC Alsthom Electromecanique SA
Publication of EP0723278A1 publication Critical patent/EP0723278A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
    • H01F6/065—Feed-through bushings, terminals and joints

Definitions

  • the invention relates to a high voltage current supply between a superconducting application at low critical temperature and a connection end at room temperature of a high voltage power cable.
  • the invention relates to a high-voltage current supply between a superconductive application and a connection end at ambient temperature of a power cable, the said supply comprising at least one superconducting element at high critical temperature, first means of electrical connection between a first end of the high critical temperature superconducting element and the connection end at room temperature, and second electrical connection means between a second end of the high critical temperature superconducting element and the superconductive application .
  • French patent application No. 9301213 discloses a supply of this type.
  • a device comprising a conductor connecting the connection end at room temperature to the critical high temperature superconducting element, which is then connected to the application.
  • the application at critical low temperature is bathed in liquid helium.
  • the conductor is cooled from room temperature to the critical high temperature by being immersed in a container containing liquid nitrogen.
  • the critical high temperature superconducting element is contained in a sealed enclosure at least part of which is in contact with the liquid helium of the application bath.
  • the tank filled with liquid helium and in which the application at low critical temperature is bathed also contains the containers filled with nitrogen. liquid and the sealed enclosures surrounding the superconducting elements at high critical temperature.
  • DE-A-4223145 relates to a current supply between a superconducting application at low critical temperature (4.7 K) and a connection end at room temperature (300 K) of a high voltage power cable.
  • the supply comprising at least one superconducting element at high critical temperature (77 K), electrical conductor means between a first end of the superconductive element at high critical temperature and the connection end at room temperature, and connection means electric between a second end of the superconducting element at high critical temperature and the superconductive application at low critical temperature.
  • the conductive means form a metal cavity comprising first and second ends connected respectively with the first end of the superconducting element at high critical temperature and with the connection end at room temperature.
  • the cavity houses a reservoir filled with liquid nitrogen, part of the conductive means, constituting the metallic cavity, comprising the first end of the metallic cavity, being substantially in contact with the reservoir.
  • the supply extends vertically to the superconductive application at low critical temperature being below the supply, and the helium vapors rise and participate in the cooling of the supply.
  • the exchange coefficients between helium vapors and the high critical temperature superconducting element must be sufficient for the latter to be at a temperature close to that of liquid nitrogen when they reach the first end of the element. high critical temperature superconductor. If the helium vapor temperature is less than 63 K, so there is a risk of nitrogen freezing.
  • a first object of the present invention is to provide a current supply for cooling the conductors exclusively by thermal conduction.
  • Another object of the present invention is to provide a layout current and a simplified structure even at very high voltage and in alternating mode.
  • the invention relates to a current supply between a superconductive application at low critical temperature and a connection end at room temperature of a high voltage power cable, said supply comprising at least one superconductive element at high critical temperature.
  • electrically conductive means between a first end of the superconductive element at high critical temperature and the connection end to ambient temperature, and means of electrical connection between a second end of the high critical temperature superconducting element and the superconductive application.
  • the conductive means form a metallic surface comprising first and second ends connected respectively with the first end of the superconducting element at high critical temperature and with the connection end at room temperature, the first end of said surface being in contact a tank filled with a cryogenic fluid with a temperature equal to or less than 77 K.
  • the reservoir is structurally sealed and thermally isolated from the application at low critical temperature.
  • the superconductive installation is placed in a sealed metal tank filled with liquid helium. Said second end of said high critical temperature superconducting element being in contact with at least part of the tank.
  • the sealed liquid helium tank containing the superconductive application, the superconductive element at high critical temperature, the cryogenic fluid reservoir, and the metal surface are arranged in a grounded enclosure, and in which there is a high vacuum, the second end of the metal surface passing in a sealed and electrically isolated manner through said grounded metal enclosure, and being connected to the connection end at ambient temperature outside said enclosure grounded metal.
  • Radiation shields surround the sealed liquid helium vessel containing the superconductive application, the high critical temperature superconductive element, and the metal surface, inside the grounded metal enclosure .
  • electrically insulating heat shields are arranged around the metal surface, and near the second end of the metal surface inside the grounded metal enclosure.
  • the tank filled with cryogenic fluid and the metal tank filled with liquid helium are connected to supply tanks for cryogenic fluid and liquid helium respectively by supply links, said connections electrically insulating supply tank filled with cryogenic fluid and the metal tank filled with liquid helium from their associated supply tank.
  • a first advantage of the present invention is to have eliminated direct contact of the conductors with the cryogenic fluid intended to cool them.
  • a second advantage is to provide a current supply of a simplified arrangement which does not generate unacceptable bulk even at very high voltage.
  • Figure 1 is a schematic representation of an embodiment of a feed according to the invention.
  • Figure 2 is a schematic sectional representation along line II-II of the representation of Figure 1.
  • the purpose of the current supply is to bring high or very high voltage current between a superconductive application 2 at low critical temperature (4.2 K) and a connection end 3 of a cable. high voltage energy at room temperature (300 K).
  • the supply comprises at least one superconducting element 4 at high critical temperature (77 K), electrical conductor means 5 between a first end 6 of the superconducting element 4 at high critical temperature and the connection end 3 at ambient temperature, and electrical connection means 7 between a second end 8 of the superconductive element 4 at high critical temperature and the superconductive application 2.
  • high critical temperature 77 K
  • electrical conductor means 5 between a first end 6 of the superconducting element 4 at high critical temperature and the connection end 3 at ambient temperature
  • electrical connection means 7 between a second end 8 of the superconductive element 4 at high critical temperature and the superconductive application 2.
  • the conductive means 5 form a metal surface 9 comprising a first 10 and a second 11 ends connected respectively with the first end 6 of the superconducting element 4 at high critical temperature and with the connection end 3 at temperature ambient.
  • the first end 10 of said surface being in contact with a reservoir 12 filled with a cryogenic fluid of temperature equal to or less than 77 K.
  • the first end 6 of the superconducting element 4 at high critical temperature is in contact with at least part of the reservoir 12.
  • the first end 6 of the superconducting element 4 at high critical temperature and the part of the conductive means 5 constituting the metal surface 9 comprising the first end 10 of the metal surface 9 are cooled by thermal conduction at the temperature of the cryogenic liquid. contained in the reservoir 12, that is to say 77 K.
  • the reservoir 12 is made of a material which is a good thermal conductor such as, for example without limitation, copper.
  • the metal surface 9 is a hollow cylinder formed by a plurality of conductors 25, each forming a generator of said cylinder.
  • the conductors are optimized to limit losses in alternating current regime.
  • the plurality of conductors 25 advantageously have a rectangular cross section and / or consist of several transposed elementary conductors.
  • the superconducting element 4 at high critical temperature is a superconductive tube 4 at high critical temperature.
  • the superconductive installation 2 is placed in a metal tank 13 filled with liquid helium (4.2 K), sealed and thermally insulated from the reservoir 12.
  • the second end 8 of the superconductive element 4 at high temperature critical is in contact, via connection means 7, with liquid helium.
  • the second end 8 of the superconducting element 4 at high critical temperature is cooled by thermal conduction to the temperature of the liquid helium contained in the metal tank 13, that is to say 4.2 K.
  • the sealed metal tank 13 filled with liquid helium and comprising the superconductive application 2, the superconductive element 4 at high critical temperature, and the metal surface 9 are arranged in an enclosure 14 placed at the mass, and in which there is a high vacuum (of the order of 10-6 Torr).
  • This high vacuum plays both the role of thermal insulator and electrical insulator between the enclosure 14 to earth and the supply and application which are at high voltage.
  • This metal enclosure 14 is advantageously made of stainless steel, for example 304L.
  • the second end 11 of the metal surface 9 passes through a sealed and electrically isolated enclosure the metal enclosure 14 grounded, and is connected to the connection end 3 at ambient temperature outside said metallic enclosure 14 the mass.
  • Insulation and sealing with the metal enclosure 14 can be carried out, without limitation, by an insulating piece 20 of glass or ceramic mounted on an insulator 21 of charged epoxy resin or of tempered glass.
  • radiation shields 30 connected to ground surround the sealed metal tank 13 filled with liquid helium and comprising the superconductive application 2, the superconductive element 4 at high critical temperature, and the metal surface 9.
  • heat shields 31 are arranged around the metal surface 9, and near the second end 11 of the metal surface 9.
  • the tank 12 filled with liquid nitrogen and the metal tank 13 filled with liquid helium are connected to supply tanks 17, 18 respectively in liquid nitrogen and in liquid helium by supply links 15, 16.
  • Supply links 15, 16 electrically isolate the tank 12 filled with liquid nitrogen and the metal tank 13 filled with liquid helium from their associated supply tank 17, 18.
  • These insulating supply links can be, without limitation, made of glass-metal or ceramic-metal type material.
  • the present invention makes it possible to have compact high voltage current leads with minimal losses for high currents under high voltage.
  • the superconducting element 4 at high critical temperature can be a superconductive electrical connection of the type described in French patent application 9409708.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Containers, Films, And Cooling For Superconductive Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP96400092A 1995-01-17 1996-01-15 Hochspannungsstromzuführung zwischen einer supraleitenden Anordnung bei kritischer Tieftemperatur und einem Hochspannungskabelanschlussende auf Umgebungstemperatur Withdrawn EP0723278A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9500467 1995-01-17
FR9500467A FR2729501A1 (fr) 1995-01-17 1995-01-17 Amenee de courant haute tension entre une installation supraconductrice btc et une extremite de connexion a temperature ambiante d'un cable haute tension

Publications (1)

Publication Number Publication Date
EP0723278A1 true EP0723278A1 (de) 1996-07-24

Family

ID=9475193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96400092A Withdrawn EP0723278A1 (de) 1995-01-17 1996-01-15 Hochspannungsstromzuführung zwischen einer supraleitenden Anordnung bei kritischer Tieftemperatur und einem Hochspannungskabelanschlussende auf Umgebungstemperatur

Country Status (8)

Country Link
EP (1) EP0723278A1 (de)
CA (1) CA2167364A1 (de)
CZ (1) CZ14396A3 (de)
FI (1) FI960175A (de)
FR (1) FR2729501A1 (de)
HU (1) HUP9600087A2 (de)
NO (1) NO960165L (de)
PL (1) PL312349A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007013350A1 (de) * 2007-03-16 2008-09-18 Bruker Biospin Ag Stromzuführung mit Hochtemperatursupraleitern für supraleitende Magnete in einem Kryostaten

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1541809A (fr) * 1967-09-01 1968-10-11 Comp Generale Electricite Traversées électriques à forte intensité et haute tension pour cryomachines électriques
DE1540246A1 (de) * 1964-12-11 1970-01-02 Philips Nv Stromzufuehrungsvorrichtung,insbesondere fuer eine bei tiefer Temperatur arbeitende Anlage
DE4223145A1 (de) * 1992-07-14 1994-01-20 Siemens Ag Stromzuführungsvorrichtung für eine auf Tieftemperatur zu haltende, insbesondere supraleitende Einrichtung
EP0580498A1 (de) * 1992-07-22 1994-01-26 Gec Alsthom Electromecanique Sa Metallische Stromzuleitung für Kryogenes System
EP0610131A1 (de) * 1993-02-04 1994-08-10 Gec Alsthom Electromecanique Sa Verbindungsdurchführung für supraleitende Spule
EP0657958A1 (de) * 1993-12-03 1995-06-14 Gec Alsthom Electromecanique Sa Stromzuführmodul für die Versorgung eines superkonductiven elektrischen Verbrauchers bei kritischen Tieftemperaturen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1540246A1 (de) * 1964-12-11 1970-01-02 Philips Nv Stromzufuehrungsvorrichtung,insbesondere fuer eine bei tiefer Temperatur arbeitende Anlage
FR1541809A (fr) * 1967-09-01 1968-10-11 Comp Generale Electricite Traversées électriques à forte intensité et haute tension pour cryomachines électriques
DE4223145A1 (de) * 1992-07-14 1994-01-20 Siemens Ag Stromzuführungsvorrichtung für eine auf Tieftemperatur zu haltende, insbesondere supraleitende Einrichtung
EP0580498A1 (de) * 1992-07-22 1994-01-26 Gec Alsthom Electromecanique Sa Metallische Stromzuleitung für Kryogenes System
EP0610131A1 (de) * 1993-02-04 1994-08-10 Gec Alsthom Electromecanique Sa Verbindungsdurchführung für supraleitende Spule
EP0657958A1 (de) * 1993-12-03 1995-06-14 Gec Alsthom Electromecanique Sa Stromzuführmodul für die Versorgung eines superkonductiven elektrischen Verbrauchers bei kritischen Tieftemperaturen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007013350A1 (de) * 2007-03-16 2008-09-18 Bruker Biospin Ag Stromzuführung mit Hochtemperatursupraleitern für supraleitende Magnete in einem Kryostaten
DE102007013350B4 (de) * 2007-03-16 2013-01-31 Bruker Biospin Ag Stromzuführung mit Hochtemperatursupraleitern für supraleitende Magnete in einem Kryostaten

Also Published As

Publication number Publication date
NO960165D0 (no) 1996-01-15
FR2729501A1 (fr) 1996-07-19
FR2729501B1 (de) 1997-02-21
NO960165L (no) 1996-07-18
CZ14396A3 (en) 1996-08-14
FI960175A0 (fi) 1996-01-15
PL312349A1 (en) 1996-07-22
CA2167364A1 (fr) 1996-07-18
FI960175A (fi) 1996-07-18
HUP9600087A2 (en) 1997-07-28
HU9600087D0 (en) 1996-03-28

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