CN114141421A - High current density superconducting cable - Google Patents
High current density superconducting cable Download PDFInfo
- Publication number
- CN114141421A CN114141421A CN202111286612.8A CN202111286612A CN114141421A CN 114141421 A CN114141421 A CN 114141421A CN 202111286612 A CN202111286612 A CN 202111286612A CN 114141421 A CN114141421 A CN 114141421A
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- Prior art keywords
- superconducting
- stacked
- current density
- high current
- tapes
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000010410 layer Substances 0.000 claims abstract description 45
- 238000001816 cooling Methods 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 24
- 239000011241 protective layer Substances 0.000 claims abstract description 15
- 230000001681 protective effect Effects 0.000 claims abstract description 6
- 229910000679 solder Inorganic materials 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 5
- 230000005684 electric field Effects 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 239000004020 conductor Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 239000002887 superconductor Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910021521 yttrium barium copper oxide Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
- H01B7/421—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation
- H01B7/423—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation using a cooling fluid
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
- H01B12/02—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by their form
- H01B12/04—Single wire
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
The invention discloses a high current density superconducting cable, comprising: the stacked superconducting tapes are embedded in the framework and are stacked to form a columnar structure with a rectangular cross section; protective layers disposed on top and bottom of the stacked superconductive tapes; the framework comprises an upper cooling channel and a lower cooling channel which are arranged in a vertically symmetrical mode by using a horizontal central shaft of the stacked superconducting tape, and also comprises a left liquid nitrogen inflow groove and a right liquid nitrogen inflow groove which are arranged in a horizontally symmetrical mode by using a vertical central shaft of the stacked superconducting tape; an insulating layer covering the skeleton; a shielding layer covering the insulating layer; and the protective shell coats the shielding layer. According to the invention, multiple superconducting tapes are stacked and packaged, and a groove-shaped round cable-shaped structure is designed to protect the superconducting tapes; the cooling pipeline tightly attached to the strip is designed, so that when the superconducting tape works in a superconducting state, the stress balance of the superconducting tape structure is ensured, and the rapid heat dissipation with large contact area is realized.
Description
Technical Field
The invention belongs to the technical field of power cables, and particularly relates to a high-current-density super-guide cable.
Background
With the continuous development and breakthrough of superconducting materials, the second generation high temperature superconductors successfully realize the mass production of flat superconducting conductors through a thin film epitaxial growth technology.
The second generation high temperature superconductors have not been used in large scale, and one of the main reasons is that the flat material structure causes great difficulty in practical application. The key point in the development process of the high-temperature superconducting key application field is the design of a conductor structure. Despite the great development and progress of high temperature superconducting material technology, the technology development of conductor forming process of multiple strips is relatively slow. Therefore, the design of the high-temperature superconducting cable conductor structure gradually becomes a main direction of the high-temperature superconducting development application, is the key of the next application of the high-temperature superconducting under the environment of high current and high magnetic field, and has important significance for the development of the future high-temperature superconducting in the important scientific and technical fields.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a high current density superconducting cable, so that the superconducting tape has uniform stress and uniform magnetic field distribution, and can stably transmit a large current.
To solve the above technical problem, the present invention provides a high current density superconducting cable, comprising:
the stacked superconducting tapes are embedded in the framework and are stacked to form a columnar structure with a rectangular cross section;
protective layers disposed on top and bottom of the stacked superconductive tapes;
the framework comprises an upper cooling channel and a lower cooling channel which are arranged in a vertically symmetrical mode by using a horizontal central shaft of the stacked superconducting tape, and also comprises a left liquid nitrogen inflow groove and a right liquid nitrogen inflow groove which are arranged in a horizontally symmetrical mode by using a vertical central shaft of the stacked superconducting tape;
an insulating layer covering the skeleton;
a shielding layer covering the insulating layer;
and the protective shell coats the shielding layer.
Furthermore, the protective layer comprises an upper layer and a lower layer which are respectively and additionally arranged at the top and the bottom of the stacked superconducting tape, and the thickness of each layer is 2-3 times of that of a single-layer superconducting tape.
Further, the upper and lower layers of the protective layer are connected to the stacked superconducting tapes by solder coated on the top and bottom layers of the stacked superconducting tapes, respectively.
Further, the cooling channel is a tubular structure having a semicircular ring or a semicircular rectangular ring in cross section, and has an arch portion and a duct portion, and the arch portion is joined to the protective layer.
Further, the cross section of the liquid nitrogen inflow groove is rectangular or semicircular, and the liquid nitrogen inflow groove is connected with the stacked superconducting tapes through the coated solder tapes.
Further, the cooling channels on the upper side and the lower side of the framework and the liquid nitrogen inflow grooves on the left side and the right side of the framework jointly form an embedding space, and the stacked superconducting tapes are embedded in the embedding space.
Furthermore, the insulating layer is used for fixing the framework and is formed by winding insulating paper with good mechanical property and good insulating property at low temperature.
Furthermore, the shielding layer is grounded at a single end or two ends to form a Faraday cage for shielding the external electric field of the high-current-density superconducting cable.
Further, the upper cooling channel or the lower cooling channel is also provided with a pair of partition plates in the vertical direction, and the partition plates are inserted between the stacked superconducting tapes and the liquid nitrogen inflow grooves on the left side and the right side.
Further, the high current density superconducting cable is a rod-shaped structure having a circular cross section, and the stacked superconducting tapes are located at the center of the circular shape.
The implementation of the invention has the following beneficial effects: stacking and packaging a plurality of superconducting tapes, and designing a groove-shaped round cable-shaped structure to protect the superconducting tapes; the cooling pipeline tightly attached to the strip is designed, so that when the superconducting tape works in a superconducting state, the stress balance of the superconducting tape structure is ensured, and the rapid heat dissipation with large contact area is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic perspective view of a high current density superconducting cable according to an embodiment of the present invention after packaging.
Fig. 2 is a schematic cross-sectional view of a high current density superconducting cable according to an embodiment of the present invention after the encapsulation.
Fig. 3 is a schematic perspective view of a skeleton unit according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the invention may be practiced. The terms of direction and position of the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the present invention.
Referring to fig. 1, an embodiment of the invention provides a high current density superconducting cable, including:
a stacked superconducting tape 1 embedded in the former 5, the stacked superconducting tape 1 being formed by stacking a plurality of layers of superconducting tapes into a columnar structure having a rectangular cross section;
the framework 5 comprises an upper cooling channel 3 and a lower cooling channel 3 which are arranged in a vertically symmetrical manner by using a horizontal central shaft of the stacked superconducting tape 1, and also comprises a left liquid nitrogen inflow groove 4 and a right liquid nitrogen inflow groove 4 which are arranged in a horizontally symmetrical manner by using a vertical central shaft of the stacked superconducting tape 1;
an insulating layer 7 covering the skeleton 5;
a shielding layer 8 covering the insulating layer 7;
and a protective shell 9 covering the shielding layer 8.
Specifically, as shown in fig. 2 and 3, the stacked superconducting tapes 1 are stacked by using YBCO superconducting tapes of stainless steel reinforcing layers, and form a columnar structure with a rectangular cross section, which is a region where current flows. The present embodiment is not limited to the illustrated superconducting tapes, and a superconducting tape having an appropriate width may be selected according to actual needs. The high-temperature superconducting tape is formed by stacking a plurality of layers, so that the current carrying capacity of the conductor can be greatly improved, the superconducting tape is not twisted in the stacking process, and the performance of the superconductor is ensured;
the protective layer 2 comprises an upper layer and a lower layer which are respectively and additionally arranged at the top and the bottom of the stacked superconducting tape 1, and the thickness of each layer is 2-3 times of that of a single-layer superconducting tape. The protective layer 2 can be a copper strip with good heat transfer performance and stable mechanical performance at low temperature, but is not limited to the copper strip. The upper and lower layers of the protective layer 2 are connected to the stacked superconducting tapes 1 by a layer of solder coated on the top and bottom layers of the stacked superconducting tapes 1, respectively.
The cooling channel 3 is a tubular structure, and the cross section of the cooling channel can be a semicircular ring shape, and can also be other shapes, such as a semicircular rectangular ring. The cooling channel 3 has an arch portion joined to the protective layer 2 and a pipe portion, and by appropriately designing the contact area of the arch portion and the protective layer 2, the cooling channel 3 can sufficiently perform heat repeated exchange with the stacked superconducting tapes 1, and the cooling efficiency is improved. Liquid nitrogen flows into the grooves 4 on the left and right sides of the stacked superconducting tape 1 for inputting liquid nitrogen, and the cross section thereof may be rectangular or semicircular as an example. The liquid nitrogen flowing in the groove 4 is also connected to the stacked superconducting tapes 1 by a solder tape applied thereto. Note that the cooling passage 3 and the liquid nitrogen inlet tank 4 are communicated with each other by an external circulation pump (not shown).
It can be seen that the cooling channels 3 on the upper and lower sides and the liquid nitrogen inflow grooves 4 on the left and right sides in the framework 5 together form an embedding space, and the stacked superconducting tapes 1 are embedded in the embedding space, so that the structural stability of the stacked superconducting tapes can be improved, and the superconducting tapes are prevented from being deformed, damaged and quenched due to mechanical external force; meanwhile, the cold circulation contact surface of the superconducting tape is increased. The stacked superconducting tape 1 is embedded so as to have a rod-like structure with a circular cross section as a whole, and the stacked superconducting tape 1 is located at the center of the circular shape.
The insulating layer 7 coated outside the framework 5 is used for fixing the framework, and the insulating layer 7 is formed by winding insulating paper with good mechanical performance and good insulating performance at low temperature.
The shielding layer 8 covers the outer surface of the insulating layer 7, and is grounded at a single end or two ends to form a Faraday cage for shielding an external electric field of the superconducting cable.
The protective casing 9 is coated outside the shielding layer 8 and used for protecting the whole high-current-density superconducting cable structure, and the protective casing 9 can be made of non-metal materials, such as plastic materials and the like.
As a further improvement of this embodiment, the upper cooling channel or the lower cooling channel is further provided with a pair of partition plates 10 in the vertical direction, and the partition plates are inserted between the stacked superconducting tapes 1 and the liquid nitrogen inflow grooves 4 on the left and right sides to balance the stress, so that the stacked superconducting tapes 1 can be more stably embedded into the framework 5, and meanwhile, a space is reserved for the liquid nitrogen inflow grooves 4 to ensure the inflow of liquid nitrogen.
As can be seen from the above description, compared with the prior art, the beneficial effects of the present invention are: stacking and packaging a plurality of superconducting tapes, and designing a groove-shaped round cable-shaped structure to protect the superconducting tapes; the cooling pipeline tightly attached to the strip is designed, so that when the superconducting tape works in a superconducting state, the stress balance of the superconducting tape structure is ensured, and the rapid heat dissipation with large contact area is realized.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (10)
1. A high current density superconducting cable, comprising:
the stacked superconducting tapes are embedded in the framework and are stacked to form a columnar structure with a rectangular cross section;
protective layers disposed on top and bottom of the stacked superconductive tapes;
the framework comprises an upper cooling channel and a lower cooling channel which are arranged in a vertically symmetrical mode by using a horizontal central shaft of the stacked superconducting tape, and also comprises a left liquid nitrogen inflow groove and a right liquid nitrogen inflow groove which are arranged in a horizontally symmetrical mode by using a vertical central shaft of the stacked superconducting tape;
an insulating layer covering the skeleton;
a shielding layer covering the insulating layer;
and the protective shell coats the shielding layer.
2. The high current density superconducting cable of claim 1, wherein the protective layer comprises an upper layer and a lower layer respectively attached to the top and bottom of the stacked superconducting tapes, and each layer has a thickness 2-3 times that of a single layer of superconducting tape.
3. The high current density superconducting cable according to claim 2, wherein the upper and lower layers of the protective layer are connected to the stacked superconducting tapes by solder applied to the top and bottom layers of the superconducting tapes, respectively.
4. The high current density superconducting cable of claim 1, wherein the cooling channel is a tubular structure having a semi-circular ring or a semi-rectangular ring in cross-section, the cooling channel having an arch portion and a conduit portion, the arch portion being joined to the protective layer.
5. The high current density superconducting cable of claim 1, wherein the liquid nitrogen inflow groove is rectangular or semicircular in cross-section, and the liquid nitrogen inflow groove and the stacked superconducting tapes are connected by a coated solder tape.
6. The high current density superconducting cable according to claim 1, wherein the upper and lower cooling channels and the left and right liquid nitrogen inflow grooves in the former together form an embedding space in which the stacked superconducting tapes are embedded.
7. The high current density superconducting cable of claim 1, wherein the insulating layer is used to fix the former, and the insulating layer is wound from an insulating paper having good mechanical properties and good insulating properties at low temperatures.
8. The high current density superconducting cable of claim 1, wherein the shielding layer is grounded at one or both ends to form a "faraday cage" for shielding the high current density superconducting cable from external electric fields.
9. The high current density superconducting cable according to claim 1, wherein the upper cooling channel or the lower cooling channel is further provided with a pair of partitions in a vertical direction interposed between the stacked superconducting tapes and the liquid nitrogen inflow grooves on the left and right sides.
10. The high current density superconducting cable of claim 1, wherein the high current density superconducting cable is a rod-like structure with a circular cross-section, the stacked superconducting tapes being located in the center of the circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111286612.8A CN114141421A (en) | 2021-11-02 | 2021-11-02 | High current density superconducting cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111286612.8A CN114141421A (en) | 2021-11-02 | 2021-11-02 | High current density superconducting cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114141421A true CN114141421A (en) | 2022-03-04 |
Family
ID=80392969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111286612.8A Pending CN114141421A (en) | 2021-11-02 | 2021-11-02 | High current density superconducting cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114141421A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06302233A (en) * | 1993-04-13 | 1994-10-28 | Fujikura Ltd | Oxide superconductive power cable |
| CN101030461A (en) * | 2006-02-28 | 2007-09-05 | 北京英纳超导技术有限公司 | Superconductive assembly and its production |
| CN105706187A (en) * | 2013-09-11 | 2016-06-22 | 株式会社瑞蓝 | Superconductor and method of manufacturing same |
| CN109637739A (en) * | 2018-12-20 | 2019-04-16 | 深圳供电局有限公司 | Quasi-isotropic high-current-carrying superconducting cable electrifying conductor |
-
2021
- 2021-11-02 CN CN202111286612.8A patent/CN114141421A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06302233A (en) * | 1993-04-13 | 1994-10-28 | Fujikura Ltd | Oxide superconductive power cable |
| CN101030461A (en) * | 2006-02-28 | 2007-09-05 | 北京英纳超导技术有限公司 | Superconductive assembly and its production |
| CN105706187A (en) * | 2013-09-11 | 2016-06-22 | 株式会社瑞蓝 | Superconductor and method of manufacturing same |
| CN109637739A (en) * | 2018-12-20 | 2019-04-16 | 深圳供电局有限公司 | Quasi-isotropic high-current-carrying superconducting cable electrifying conductor |
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