EP1301933A1 - Dispositif supraconducteur comportant une unite de limitation de courant inductive realisee a l'aide d'un materiau supraconducteur hote tc - Google Patents

Dispositif supraconducteur comportant une unite de limitation de courant inductive realisee a l'aide d'un materiau supraconducteur hote tc

Info

Publication number
EP1301933A1
EP1301933A1 EP01953888A EP01953888A EP1301933A1 EP 1301933 A1 EP1301933 A1 EP 1301933A1 EP 01953888 A EP01953888 A EP 01953888A EP 01953888 A EP01953888 A EP 01953888A EP 1301933 A1 EP1301933 A1 EP 1301933A1
Authority
EP
European Patent Office
Prior art keywords
current limiter
superconducting
winding
refrigerant
limiter unit
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Withdrawn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
EP01953888A
Other languages
German (de)
English (en)
Inventor
Heinz-Werner NEUMÜLLER
Günter RIES
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1301933A1 publication Critical patent/EP1301933A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F36/00—Transformers with superconductive windings or with windings operating at cryogenic temperature
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S336/00—Inductor devices
    • Y10S336/01—Superconductive

Definitions

  • the invention relates to a superconducting device with at least one inductive current limiter unit, which has at least one conductor track carrying a magnetic switching current in the case of limitation, at least one ring body made of high-T c superconductor material inductively assigned to the conductor track, and a core leg made of soft magnetic material enclosed by the ring body contains.
  • a corresponding superconductivity device can be found in EP 0 353 449 AI.
  • a transformer can be assigned to your at least one current limiter unit, which transformer has a primary and a secondary coil winding and an associated magnetic flux body made of soft magnetic material with several yoke legs.
  • the current rise after a short circuit can be limited to a value of a few multiples of the nominal current in a manner known per se.
  • a limiter unit is ready for operation again a short time after the shutdown process. So it acts like a quick, self-healing backup. It ensures a high level of operational safety because it acts passively, ie it works autonomously without short-circuit detection and without an active triggering by a switching signal.
  • Superconducting current limiter units usually form a switching element to be inserted serially into a circuit.
  • Corresponding current limiter units can be of the so-called resistive or inductive type.
  • Inductive current limiter units are often designed as choke coils (see e.g. DE 38 29 207 AI or EP 0 440 664 Bl).
  • a shielding current is induced by a conductor track of a choke coil winding carrying a nominal current during operation in an associated (secondary) superconducting winding which is short-circuited.
  • This superconducting winding can also be formed by a superconducting core or the part of such a core in the interior of the choke coil.
  • the shielding current induced by a corresponding switching current in the superconducting winding or the core becomes so great that the critical (shielding) current of the superconducting material is exceeded.
  • the load-bearing capacity of this winding or the core collapses due to the superconducting material becoming normally conductive, as a result of which the inductance of the inductor increases abruptly and the AC resistance in the conductor track of the inductor is accordingly increased to a value causing the current limitation.
  • a corresponding inductive current limiter unit emerges from the EP-A document mentioned at the beginning. It contains an induction coil through which the nominal current flows, the one Encloses ring body made of high-T c superconductor material.
  • This ring body has a centrally symmetrical, hollow interior, in which a core leg made of soft magnetic material of high permeability is arranged concentrically. This core leg can also be part of a complete, self-contained magnetic circuit.
  • Known current limiter units of this type with metal oxide high-T c materials (so-called “HTS” materials) whose transition temperature T c is so high that they can be kept in the superconducting operating state with liquid nitrogen (LN 2 ) of at most 77 K, show a rapid increase in the electrical resistance when their critical values are exceeded.
  • the associated heating to the normal conducting state and thus the indirect triggering of the current limitation take place in a sufficiently short time so that the peak value of a short-circuit current to a fraction of the unlimited current.
  • the superconducting parts should be in good heat-conducting contact with a suitable refrigerant, which they can return to the superconducting operating state in a relatively short time after the critical values have been exceeded can.
  • the superconducting device consequently has at least one inductive current limiter unit, which has at least one conductor path carrying a switching current in the event of a limitation, at least one ring body made of high-T c superconductor material inductively assigned to the conductor path and a core leg made of soft magnetic material enclosed by the ring body Contains material. Furthermore, the device has a transformer which contains a primary and a secondary coil winding and an associated magnetic flux body made of soft magnetic material with several yoke legs.
  • the magnetic flux body between the primary coil winding and the secondary coil winding should be provided with at least one further yoke leg, which is provided as the core leg of the current limiter unit, and the at least one conductor track of the current limiter unit should be formed with the at least one conductor of one of the coil windings.
  • annular body is understood to mean any structure made up of at least one element or component or conductor which contains at least high-T c superconductor material and forms a short-circuit ring which forms the associated yoke leg which acts as a magnetic bypass element of the magnetic flux body.
  • the magnetic yoke of the inductive current limiter unit is integrated as a further yoke leg in the magnetic flux body which is to be provided anyway for the transformer coil windings. This reduces the amount of soft magnetic material accordingly.
  • no separate conductor path generating a switching current is required for the current limiter unit, since the
  • Switching current is now generated by the at least one conductor of one of the coil windings itself; ie, the switching trigger send function regarding of the high-T c superconductor material of the ring body is caused solely by the conductor of this coil winding.
  • the conductors of the transformer coil windings can also particularly advantageously contain high-T c superconductor material.
  • the coil windings and the current limiter unit can be arranged in a common cryostat vessel which contains two refrigerant spaces in which the winding or the current limiter unit are accommodated. This has the advantage that the
  • Refrigerant rooms can set different temperature levels.
  • the refrigerant in the refrigerant chamber of the transformer coil windings is at a lower temperature level than the refrigerant in the refrigerant chamber of the limiter unit.
  • the coolant area of these coil windings and the refrigerant space should here are the limiter unit at least approximately at the same pressure (with the inclusion of variations of the pressure in the coolant space of the limiter unit of the pressure in the refrigerant space of the windings by a maximum of ⁇ 10% '). In this way, the heat loss generated in the windings as a result of alternating current losses of the superconductor can be dissipated by convection without undesired gas formation due to appropriate evaporation.
  • the superconducting device can also comprise a current limiter unit which has a plurality of yoke legs of a magnetic flux body enclosed by superconducting ring bodies. This opens up a correspondingly large degree of design freedom with regard to the cross section of the soft magnetic material.
  • FIG. 1 essential parts of a superconducting device with a transformer and a superconducting current limiter unit in a longitudinal section
  • FIG. 2 parts of another superconducting device with a transformer and another current limiting device in a cross section
  • FIG. 3 parts of another superconducting device with a warm transformer and a superconducting current limiter unit in one Longitudinal section
  • 4 and 5 two design options of the superconducting ring body of a current limiter unit suitable for a superconducting device in cross-sectional or oblique view.
  • the magnetic coil windings of the superconducting device according to the invention are the primary and secondary windings of a transformer using preferably superconducting conductors (cf. for example WO 00/16350 A).
  • the conductors of the transformer coil windings which may be subdivided into a plurality of partial windings, need not necessarily have superconducting, in particular high-T c, superconducting material.
  • Normally conductive material is also suitable as conductor material.
  • At least one inductive current limiter unit should be assigned to the circuit of at least one of the transformer coil windings, preferably the primary winding.
  • several current limiter units can also be provided.
  • Current limiter units suitable for the superconducting device according to the invention are based on known embodiments and their mode of operation (cf., for example, DE 39 19 465 AI or EP 0 353 449 AI).
  • oxidic HTS cuprate material such as YBa 2 Cu 3 O x or Bi 2 Sr 2 CaCu 2 O y or (Bi, Pb) 2 Sr 2 Ca 2 Cu 3 O z comes in as the conductor material for the superconducting parts of the current limiter unit and optionally the coil winding Question.
  • (Bi, Pb) 2 Sr 2 CaCu 3 O z material can be selected for the conductor of a possible HTS coil winding. The specific choice of material depends on the manufacturing processes of the individual parts or is selected depending on the respective operating temperature.
  • FIG. 1 shows a first embodiment of a superconducting device according to the invention.
  • This device generally designated 2 contains, for example, a superconducting, in particular an HTS transformer 3 with a primary and a secondary (transformer) coil winding 4 and 5, respectively.
  • These coil windings each enclose a first and second yoke leg 6a and 6b of a three-legged one Magnetic flux body 6 (or magnetic core) made of soft magnetic material, as is known for example from transformer construction.
  • the magnetic flux body between the primary coil winding and the secondary coil winding should be provided with at least one further yoke leg, which acts as a current limiter unit. hearing yoke leg can be seen.
  • the magnetic flux body 6 has a central or central yoke leg 6c between its two outer yoke legs 6a and 6b as the third (further) yoke leg.
  • This yoke leg ⁇ c is enclosed in a known manner by an annular body 7 made of HTS material in the form of a corresponding hollow cylinder. Together with the ring body 7, it forms the essential part of a current limiter unit 8.
  • this current limiter unit does not have its own conductor track, which in the event of limitation is a switching current, in particular a short-circuit current.
  • this conductor track is formed by the primary winding 4 of the transformer 3.
  • This winding constructed with at least one conductor designed for a nominal current, generates an alternating magnetic flux in the magnetic flux body 6 in the magnetic flux body 6 in a closed magnetic flux circuit in which the two yoke legs 6a and 6b assigned to the primary winding 4 and the secondary winding 5 are located.
  • this magnetic flux present during operation between the primary and secondary windings via the yoke legs 6a and 6b is indicated by a dashed, arrowed line 10.
  • a ring current or shielding current is induced in the superconducting ring body 7, which prevents magnetic flux from flowing through the yoke leg 6c enclosed by it.
  • the superconducting device according to the invention is not limited to a soft magnetic flux body or yoke core, which has only a single additional yoke leg as a magnetic bypass element with an HTS ring body.
  • FIG. 2 shows the bypass duck.
  • the superconducting device generally designated 12, accordingly contains a magnetic flux body 16 with two additional yoke legs 16c and 16d serving as magnetic bypass elements, each of which consists of a hollow cylindrical ring body 17a or 17b
  • the primary winding 14 of a transformer is arranged around a central yoke leg 16b.
  • the secondary winding 15 of this transformer then not only encloses the primary winding 14, but also the two yoke legs 16c and 16d arranged laterally therefrom with their HTS ring bodies 17a and 17b.
  • the two outer side parts 16a and 16e of the magnetic flux body 16 can also be seen.
  • the primary and / or secondary winding of a transformer are advantageously made of superconducting conductors, in particular HTS conductors.
  • HTS material is used for the conductors
  • the material of the HTS ring body 7, 17a, 17b need not necessarily be identical to that for the conductors of the at least one winding.
  • All superconducting parts are expediently accommodated in a common cryostat vessel, discrete refrigerant spaces being optionally provided for the at least one ring body and the at least one coil winding.
  • This has the advantage that different temperature levels can be set in the refrigerant rooms, but in particular at the same pressure. It can be expedient if the refrigerant spaces are in a refrigerant connection with one another. This is because it is advantageously possible to exchange the refrigerant between the two refrigerant spaces which may be at di ferent temperature levels.
  • FIG. 3 shows a corresponding exemplary embodiment of a superconducting device 22 with a transformer 23 which contains a primary winding 24 and a secondary winding 25 made of normally conductive, non-cooled conductors.
  • a magnetic flux body 26 used has a central yoke leg 26b and two outer yoke legs 26a and 26e.
  • each of the spaces 28a and 29b between the middle yoke leg 26b and the two outer yoke legs 26a and 26e there is another yoke leg 26c and 26d as a magnetic bypass element.
  • This Elements are each enclosed by a hollow cylindrical HTS ring body 27a or 27b and form current limiter units 28a or 28b.
  • the HTS ring bodies, together with their associated yoke legs 26c and 26d, are each located in their own cryostat 30a or 30b. This makes it necessary for there to be a small gap sl or s2 between the end faces of the yoke bodies 26c and 26d located in the cryostats 30a and 30b and the respectively adjacent, non-cooled parts of the magnetic flux body 26.
  • cryostat walls must therefore consist of a non-magnetic, electrically poorly conductive material such as stainless steel, so that no winding voltages can be induced in them during normal operation.
  • a cross section through the shown structure of the superconducting device 22 according to FIG. 3 has an appearance corresponding to that of FIG. 2.
  • the magnetic flux lines 10 and 11 are also illustrated in FIG.
  • an HTS ring body in the form of a hollow cylinder made of HTS solid material or a carrier tube made of non-magnetic material such as ceramic, glass or metal, which is coated with the HTS material as a thin or thick film.
  • HTS ring body in the form of a short-circuit winding, for example made of (Bi, Pb) 2 Sr 2 Ca 2 Cu 3 O z -HTS-
  • FIG. 4 A corresponding exemplary embodiment is indicated in FIG. 4 in a perspective view.
  • a hollow cylindrical yoke leg 36i serving as a magnetic bypass element made of soft magnetic material is provided with two superconducting windings 37a and 37b of identical winding number wrapped on the inside and outside. These windings form an HTS ring body 27 in that they are connected to one another in such a way that a current flows through them in the opposite direction.
  • the primary winding with a yoke leg of a magnetic flux body is located within the magnetic bypass element or yoke leg 36i, while a secondary winding is arranged around this leg.
  • the main flow of the transformer does not induce current; only a leakage flux is shielded.
  • the superconducting material changes to the normal conducting state, the magnetic flux closing via the yoke leg 36 as a magnetic bypass.
  • the result is a structure of a superconducting device similar to that according to FIGS. 2 and 3.
  • an HTS ring body in the form of a short-circuit winding made of an HTS strip conductor, which forms a film made of HTS material such as YBa 2 on a strip-shaped carrier material such as stainless steel or a Ni alloy (eg made of "Hastelloy”) Cu 3 O x
  • the short-circuit winding can be designed, for example, in accordance with FIG.
  • the HTS ring body which is composed of individual HTS elements.
  • a corresponding exemplary embodiment is shown in cross section in FIG.
  • the HTS ring body, designated 47 encloses a yoke body 46i serving as a magnetic bypass element. It is composed of individual plate elements 47i, which are connected to one another at their edges in an electrically conductive manner via electrical connecting elements 48i to form a short-circuit ring.
  • the plate elements 47i have, for example, a corresponding carrier element 49 made of an insulating material such as a ceramic or glass, on which an HTS layer 50, for example made of YBa 2 Cu 3 O x, which is represented by a reinforced line, is applied.
  • an HTS layer 50 for example made of YBa 2 Cu 3 O x, which is represented by a reinforced line, is applied.
  • four such HTS plate elements 47i are interconnected to form the short-circuit ring; Of course a different number of corresponding elements can also be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Containers, Films, And Cooling For Superconductive Devices (AREA)

Abstract

L'invention concerne un dispositif supraconducteur (22) qui comprend une unité de limitation de courant (28a, 29b) inductive pourvue d'un corps annulaire (27a, 27b) constitué d'un matériau supraconducteur hôte Tc et entourant une branche de culasse (26c, 26d) constituée d'un matériau magnétique doux, ainsi qu'un transformateur (23) pourvu d'un enroulement primaire et d'un enroulement secondaire (24, 25) et d'un corps à flux magnétique (26) qui est constitué d'un matériau magnétique doux et présente plusieurs branches de culasse (26a-26e). Le corps à flux magnétique (26) doit contenir, entre l'enroulement primaire (24) et l'enroulement secondaire (25) du transformateur (23), la branche de culasse (26c, 26d) de l'unité de limitation de courant (28), un courant de commutation étant produit pour l'unité de limitation de courant (28) avec le conducteur d'un enroulement (24).
EP01953888A 2000-07-21 2001-07-09 Dispositif supraconducteur comportant une unite de limitation de courant inductive realisee a l'aide d'un materiau supraconducteur hote tc Withdrawn EP1301933A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10035634 2000-07-21
DE10035634A DE10035634A1 (de) 2000-07-21 2000-07-21 Supraleitungseinrichtung mit induktiver Strombegrenzereinheit unter Verwendung von Hoch-Tc-Supraleitermaterial
PCT/DE2001/002550 WO2002009129A1 (fr) 2000-07-21 2001-07-09 Dispositif supraconducteur comportant une unite de limitation de courant inductive realisee a l'aide d'un materiau supraconducteur hote tc

Publications (1)

Publication Number Publication Date
EP1301933A1 true EP1301933A1 (fr) 2003-04-16

Family

ID=7649793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01953888A Withdrawn EP1301933A1 (fr) 2000-07-21 2001-07-09 Dispositif supraconducteur comportant une unite de limitation de courant inductive realisee a l'aide d'un materiau supraconducteur hote tc

Country Status (5)

Country Link
US (1) US6795282B2 (fr)
EP (1) EP1301933A1 (fr)
JP (1) JP3699448B2 (fr)
DE (1) DE10035634A1 (fr)
WO (1) WO2002009129A1 (fr)

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DK2260557T3 (da) * 2008-04-03 2012-12-17 Zenergy Power Pty Ltd Fejlstrømsbegrænser
PL2302711T3 (pl) * 2008-11-29 2013-05-31 Alstom Technology Ltd Ogranicznik prądu zakłóceniowego z wieloma nadprzewodzącymi elementami, połączonymi w kształt pierścienia
US8169762B2 (en) * 2009-04-20 2012-05-01 Energy Safe Technologies, Inc. Relay with current transformer
EP2495745A1 (fr) * 2011-03-04 2012-09-05 ABB Technology AG Limite de hausse de courant dans les systèmes cc haute tension
DE102011103619B4 (de) * 2011-06-08 2015-05-13 Schneider Electric Sachsenwerk Gmbh Vorrichtung zur Strombegrenzung
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DE102012202513A1 (de) * 2012-02-17 2013-08-22 Schneider Electric Sachsenwerk Gmbh Vorrichtung zur Strombegrenzung
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Also Published As

Publication number Publication date
DE10035634A1 (de) 2002-02-07
US6795282B2 (en) 2004-09-21
US20030191028A1 (en) 2003-10-09
JP3699448B2 (ja) 2005-09-28
JP2004505440A (ja) 2004-02-19
WO2002009129A1 (fr) 2002-01-31

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