CN114203356A - Quasi-isotropic superconducting cable based on strip stacking and provided with cryogenic medium channel - Google Patents
Quasi-isotropic superconducting cable based on strip stacking and provided with cryogenic medium channel Download PDFInfo
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- CN114203356A CN114203356A CN202111596878.2A CN202111596878A CN114203356A CN 114203356 A CN114203356 A CN 114203356A CN 202111596878 A CN202111596878 A CN 202111596878A CN 114203356 A CN114203356 A CN 114203356A
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
- H01B12/16—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
- H01B12/02—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by their form
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- 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
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Abstract
The invention discloses a quasi-isotropic superconducting cable based on strip stacking and provided with a cryogenic medium channel. The superconducting cable comprises a superconducting strip, a hollow metal framework, a metal foil and a metal sheath. The superconducting cable adopts a structure that all groups of superconducting strips are arranged outside the hollow metal framework in a centrosymmetric mode, so that the critical current distribution of the superconducting cable is more uniform; under the condition that the size of the superconducting cable is fixed, the structure can increase the distance between each group of superconducting strips and reduce the mutual influence between magnetic fields generated by each group of superconducting strips during through-flow, so that the critical current density of the superconducting cable is increased, and the economy of the superconducting cable is improved; and the hollow metal framework is used as a low-temperature medium channel, so that heat generated when the superconducting strip flows through can be quickly transferred to the low-temperature medium, the superconducting strip is prevented from being burnt out due to excessive heating, and the stability of the superconducting cable in operation is improved.
Description
Technical Field
The invention relates to the application field of superconducting technology, in particular to a quasi-isotropic superconducting cable based on strip stacking and provided with a low-temperature medium channel.
Background
Superconductors have been developed rapidly since this century, and particularly high-temperature superconducting materials have emerged in recent years and are used in various superconducting cables. Currently, the second generation REBa is used2Cu3OzThe (REBCO) high-temperature superconducting tape-based superconducting cable occupies most of the market and is applied in various fields. The superconducting cables can greatly improve the transmission capacity of a power line and provide a solution for a power grid with continuously enlarged scale in China. In the operation process, heat generated in the superconducting cable cannot be quickly conducted to the low-temperature medium, and a local overheating phenomenon is easy to occur so as to damage the superconducting cable. In addition, in other superconducting cable structures, the superconducting tapes are stacked very tightly, so that the self-field during through-flow is large, therefore, the invention provides a novel tape stacking-based matching methodThe quasi-isotropic superconducting cable structure with the low-temperature medium channel increases the distance between the groups of superconducting tapes, reduces the mutual influence between magnetic fields generated by the groups of superconducting tapes during through-flow, improves the critical current density of the superconducting cable, provides a way for heat dissipation by the low-temperature medium channel, and improves the stability during operation.
Disclosure of Invention
The invention aims to provide a quasi-isotropic superconducting cable based on strip stacking and provided with a low-temperature medium channel, which solves the problems that the critical current density of the existing superconducting cable is attenuated too much under the action of a self-field and the superconducting cable can be locally overheated during operation, and can improve the economy and the stability during operation of the superconducting cable.
In order to achieve the above object, the present invention provides the following solutions.
Quasi-isotropic superconducting cable based on tape stacking and equipped with cryogenic medium channels, characterized in that it comprises: superconducting strips, hollow metal frameworks, metal foils and metal sheaths; the superconducting tapes comprise four groups of superconducting tapes with the same quantity, namely a first group of superconducting tapes, a second group of superconducting tapes, a third group of superconducting tapes and a fourth group of superconducting tapes. The first group of superconducting tapes and the third group of superconducting tapes are symmetrical about the center of the hollow metal skeleton; the second group of superconducting tapes and the fourth group of superconducting tapes are symmetrical about the center of the hollow metal skeleton; the first group of superconducting tapes are rotated by 90 degrees around the center of the hollow metal framework in a counterclockwise direction and then are overlapped with the second group of superconducting tapes; the metal foil is coated outside the superconducting tape; the metal sheath is sleeved on the outer side of the metal foil.
Optionally, the cross section of the superconducting tape is rectangular, and the cross section of the metal foil is square.
Optionally, the hollow metal framework is a copper framework, an aluminum framework or an alloy framework.
Optionally, the hollow metal framework is a low-temperature medium channel, and the low-temperature medium that can pass through the hollow metal framework comprises liquid nitrogen, liquid helium, liquid hydrogen, liquid oxygen, liquefied natural gas and the like.
Optionally, the metal foil is an aluminum foil, a copper foil or an alloy foil.
Optionally, the metal sheath is a copper sheath, an aluminum sheath or an alloy sheath.
Optionally, the cross sections of the hollow metal framework and the metal sheath are circular. And a metal filler is filled between the hollow metal framework and the superconducting tape, and a metal filler is filled between the metal sheath and the metal foil.
Optionally, the metal filler is an aluminum filler or a copper filler.
Optionally, the cross sections of the hollow metal framework and the metal sheath are square.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention discloses a quasi-isotropic superconducting cable based on strip stacking and provided with a cryogenic medium channel. The superconducting cable comprises a superconducting strip, a hollow metal framework, a metal foil and a metal sheath. The superconducting cable adopts a structure that all groups of superconducting strips are arranged outside the hollow metal framework in a centrosymmetric mode, so that the critical current distribution of the superconducting cable is more uniform; under the condition that the size of the superconducting cable is fixed, the structure can increase the distance between each group of superconducting strips and reduce the mutual influence between magnetic fields generated by each group of superconducting strips during through-flow, so that the critical current density of the superconducting cable is increased, and the economy of the superconducting cable is improved; and the hollow metal framework is used as a low-temperature medium channel, so that heat generated when the superconducting strip flows through can be quickly transferred to the low-temperature medium, the superconducting strip is prevented from being burnt out due to excessive heating, and the stability of the superconducting cable in operation is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and 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 provided by the present invention without creative efforts.
Fig. 1 is a schematic structural diagram of a quasi-isotropic superconducting cable based on tape stacking and equipped with cryogenic medium channels according to a first embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of a first embodiment of a quasi-isotropic superconducting cable based on tape stacking and equipped with cryogenic medium channels according to the present invention.
Fig. 3 is a schematic structural diagram of a second embodiment of the quasi-isotropic superconducting cable based on tape stacking and equipped with cryogenic medium channels according to the present invention.
Fig. 4 is a schematic cross-sectional view of a second embodiment of a quasi-isotropic superconducting cable based on tape stacking and equipped with cryogenic medium channels according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a quasi-isotropic superconducting cable based on strip stacking and provided with a low-temperature medium channel, which solves the problems that the critical current density of the existing superconducting cable is attenuated too much under the action of a self-field and the superconducting cable can be locally overheated during operation, and can improve the economy and the stability during operation of the superconducting cable.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a schematic structural diagram of a quasi-isotropic superconducting cable based on tape stacking and equipped with cryogenic medium channels according to a first embodiment of the present invention. Fig. 3 is a schematic structural diagram of a second embodiment of the quasi-isotropic superconducting cable based on tape stacking and equipped with cryogenic medium channels according to the present invention. Referring to fig. 1 and 3, the structure of the quasi-isotropic superconducting cable based on tape stacking and equipped with cryogenic medium channels according to the present invention includes: superconducting strips 1, a hollow metal framework 2, metal foils 3 and a metal sheath 4. The superconducting tapes comprise four groups of superconducting tapes with the same number and size, namely a first group of superconducting tapes 101, a second group of superconducting tapes 102, a third group of superconducting tapes 103 and a fourth group of superconducting tapes 104.
Fig. 2 is a schematic cross-sectional view of a first embodiment of a quasi-isotropic superconducting cable based on tape stacking and equipped with cryogenic medium channels according to the present invention; fig. 4 is a schematic cross-sectional view of a second embodiment of a quasi-isotropic superconducting cable based on tape stacking and equipped with cryogenic medium channels according to the present invention. Referring to fig. 2, the cross section of the hollow metal framework 2 is circular, a circular hole is formed in the hollow metal framework, the hollow metal framework is a low-temperature medium channel, and the low-temperature medium which can pass through the hollow metal framework comprises liquid nitrogen, liquid helium, liquid hydrogen, liquid oxygen, liquefied natural gas and the like; a metal filler 5 is filled between the hollow metal framework 2 and each group of superconducting tapes; referring to fig. 4, the cross section of the hollow metal framework 2 is square, a square hole is formed in the hollow metal framework, the hollow metal framework is a low-temperature medium channel, and the low-temperature medium which can pass through the hollow metal framework comprises liquid nitrogen, liquid helium, liquid hydrogen, liquid oxygen, liquefied natural gas and the like.
As shown in fig. 1 and 3, the first group of superconducting tapes 101 and the third group of superconducting tapes 103 are symmetrical with respect to the center O of the hollow metal skeleton 2; the second set of superconducting tapes 102 and the fourth set of superconducting tapes 104 are symmetrical with respect to the center O of the hollow metal skeleton 2. The first group of superconducting tapes 101 rotates around the center O of the hollow metal framework 2 anticlockwise by 90 degrees and then is superposed with the second group of superconducting tapes 102; similarly, the second group of superconducting tapes 102 rotates counterclockwise by 90 degrees around the center O of the hollow metal framework 2 and then coincides with the third group of superconducting tapes 103; the third group of superconducting tapes 103 rotates around the center O of the hollow metal framework 2 counterclockwise by 90 degrees and then is superposed with the fourth group of superconducting tapes 104; the fourth group of superconducting tapes 104 rotates counterclockwise by 90 degrees around the center O of the hollow metal framework 2 and then coincides with the first group of superconducting tapes 101.
As shown in fig. 1, the metal foil 3 is wrapped on the outer side of each group of superconducting tapes, and the metal sheath 4 is sleeved on the outer side of the metal foil 3. The cross section of the metal foil 3 is square, the cross section of the metal sheath 4 is round, and a metal filler 5 is filled between the metal foil 3 and the metal sheath 4; as shown in fig. 3, the metal foil 3 is wrapped on the outer side of each group of superconducting tapes, and the metal sheath 4 is sleeved on the outer side of the metal foil 3. The cross sections of the metal foil 3 and the metal sheath 4 are square.
In practical application, the superconducting tape 1 adopts a second generation coating high-temperature superconducting tape REBa2Cu3Oz(REBCO) where RE represents a rare earth element, including yttrium (Y) and gadolinium (Gd), and the like. The hollow metal framework 2 can adopt a copper framework, an aluminum framework or an alloy framework. The hollow metal framework 2 is a low-temperature medium channel, and the low-temperature medium which can pass through the hollow metal framework comprises liquid nitrogen, liquid helium, liquid hydrogen, liquid oxygen, liquefied natural gas and the like. The metal foil 3 may be an aluminum foil, a copper foil or an alloy foil. The metal sheath 4 can be a copper sheath, an aluminum sheath or an alloy sheath, such as a stainless steel sheath.
The quasi-isotropic superconducting cable structure based on strip stacking and provided with the low-temperature medium channel can improve the critical current density of the superconducting cable under the action of a self-field, provides heat dissipation of the low-temperature medium channel to prevent local overheating, and can improve the economy and the running stability of the superconducting cable.
The quasi-isotropic superconducting cable based on stacking of tapes and equipped with a cryogenic medium channel adopts a superconducting cable structure based on a cryogenic medium channel and stacked superconducting tapes, and the first embodiment and the second embodiment comprise: superconducting strips 1, a hollow metal framework 2, metal foils 3, metal fillers 5 (optional) and a metal sheath 4. The superconducting tapes 1 are divided into four groups and are arranged outside the hollow metal framework 2 in a centrosymmetric mode, and the superconducting cable structure can reduce the mutual influence of self fields among the groups of superconducting tapes, improve the critical current density and enable the current distribution to be more uniform. The low-temperature medium channel is beneficial to heat dissipation of the superconducting tape, and the stability in operation is improved. The invention simultaneously designs two superconducting cables under the structure.
As shown in fig. 1, in a first embodiment of the quasi-isotropic superconducting cable according to the invention based on stacking of tapes and equipped with channels for cryogenic medium, the cross section of the metallic sheath 4 is circular; and a metal filler 5 is filled between the metal sheath 4 and the metal foil 3. In practical applications, the metal filler 5 may be an aluminum filler or a copper filler. As shown in fig. 2, in the second embodiment of the quasi-isotropic superconducting cable based on tape stacking and equipped with a cryogenic medium channel according to the present invention, the cross section of the metal sheath 4 is square, and the metal sheath 4 is directly coated on the outer surface of the metal foil 3 without a metal filler therebetween.
As shown in fig. 1 and 3, in the first and second embodiments of the quasi-isotropic superconducting cable based on tape stacking and equipped with cryogenic medium channels according to the present invention, the hollow metal former 2 is an integrally formed copper former, aluminum former or alloy former, and has a circular or square cross section.
Specifically, as shown in fig. 1, in the first embodiment of the quasi-isotropic superconducting cable based on tape stacking and equipped with a cryogenic medium channel according to the present invention, the quasi-isotropic superconducting cable based on tape stacking and equipped with a cryogenic medium channel is composed of a superconducting tape 1, a hollow metal former 2, a metal foil 3, a metal filler 5 (optional), and a metal sheath 4. The superconducting tapes 1 are equally divided into four groups, i.e., a first group of superconducting tapes 101, a second group of superconducting tapes 102, a third group of superconducting tapes 103, and a fourth group of superconducting tapes 104. The four groups of superconducting tapes are arranged outside the hollow metal framework 2 in a centrosymmetric manner. The outer side of the superconducting strip 1 is coated with a metal foil 3, a metal filler 5 is added on the outer side of the metal foil 3, and then a metal sheath 4 is sleeved on the metal foil, so that the quasi-isotropic superconducting cable which is based on strip stacking and is provided with a low-temperature medium channel is formed.
Specifically, as shown in fig. 3, in the second embodiment of the quasi-isotropic superconducting cable based on tape stacking and equipped with a cryogenic medium channel according to the present invention, the quasi-isotropic superconducting cable based on tape stacking and equipped with a cryogenic medium channel is composed of a superconducting tape 1, a hollow metal former 2, a metal foil 3, and a metal sheath 4. The superconducting tapes 1 are equally divided into four groups, i.e., a first group of superconducting tapes 101, a second group of superconducting tapes 102, a third group of superconducting tapes 103, and a fourth group of superconducting tapes 104. The four groups of superconducting tapes are arranged outside the hollow metal framework 2 in a centrosymmetric manner. The metal foil 3 is coated on the outer side of the superconducting strip 1, and the metal sheath 4 is sleeved on the outer side of the metal foil 3, so that the quasi-isotropic superconducting cable which is stacked based on strips and is provided with a low-temperature medium channel is formed.
The superconducting strip 1 is a second generation coating high temperature superconducting strip REBa2Cu3Oz(REBCO) where RE represents a rare earth element including yttrium (Y) and gadolinium (Gd), etc., and has a rectangular cross section. The hollow metal framework 2 adopts a copper framework, an aluminum framework or an alloy framework with a round or square cross section. The hollow metal framework 2 is a low-temperature medium channel, and the low-temperature medium which can pass through the hollow metal framework comprises liquid nitrogen, liquid helium, liquid hydrogen, liquid oxygen, liquefied natural gas and the like. The metal foil 3 may be an aluminum foil, a copper foil, or an alloy foil. The metal filler 5 is an aluminum filler or a copper filler. The cross section of the metal sheath 4 is round or square, and is one of a copper sheath, an aluminum sheath and an alloy sheath.
As shown in fig. 1 and 2, a structure of a first embodiment of a quasi-isotropic superconducting cable according to the present invention, which is based on stacking tapes and is provided with a cryogenic medium channel, includes: superconducting tapes 1, a hollow metal framework 2, a metal foil 3, a metal filler 5 (optional) and a metal sheath 4. Preferably, in the first embodiment of the present invention, the hollow metal framework 2 is a copper framework, the low-temperature medium passing through the low-temperature medium channel is liquid nitrogen, the metal foil 3 is an aluminum foil, the metal filler 5 is an aluminum filler, and the metal sheath 4 is a copper sheath. The cross sections of the copper framework 2 and the copper sheath 4 are circular; the superconducting tapes 1 are averagely divided into four groups of 10 tapes, the cross section of each superconducting tape is 2mm wide and 0.1mm thick, and each group of superconducting tapes form a rectangle with the cross section being 2mm long and 1mm wide; the copper framework is arranged on the outer side of the copper framework 2 in a centrosymmetric mode, the outer diameter of the copper framework 2 is 1mm, and the inner diameter of the copper framework is 0.8 mm; the aluminum filler 5 is filled in the gaps between the copper framework 2 and each group of superconducting tapes; the first group (upper left position) and the third group (lower right position) of superconducting tapes are horizontally arranged and spliced at the same time, and the second group (lower left position) and the fourth group (upper right position) of superconducting tapes are vertically arranged and spliced at the same time, so that a square with the side length of the cross section of 3mm is finally obtained. The aluminum foil 3 is coated outside the superconducting strip 1, the aluminum filler 5 is added on the outer side of the aluminum foil 3, and then the copper-coated sleeve 4 is sleeved on the aluminum foil 3, so that the quasi-isotropic superconducting cable which is based on strip stacking and is provided with a low-temperature medium channel is formed.
As shown in fig. 3 and 4, the second embodiment of the quasi-isotropic superconducting cable according to the present invention, which is based on stacking tapes and is provided with a cryogenic medium channel, has a structure including: superconducting strips 1, a hollow metal framework 2, a metal foil 3 and a metal sheath 4. Preferably, in the second embodiment of the present invention, the hollow metal framework 2 is a copper framework, the low-temperature medium passing through the low-temperature medium channel is liquid nitrogen, the metal foil 3 is an aluminum foil, and the metal sheath 4 is a copper sheath. The cross sections of the copper framework 2 and the copper sheath 4 are square; the superconducting tapes 1 are averagely divided into four groups of 10 tapes, the cross section of each superconducting tape is 2mm wide and 0.1mm thick, and each group of superconducting tapes form a rectangle with the cross section being 2mm long and 1mm wide; the outer side of the copper framework 2 is arranged in a centrosymmetric mode, the outer side length of the cross section of the copper framework 2 is 1mm, and the inner side length is 0.8 mm; the first group (upper left position) and the third group (lower right position) of superconducting tapes are horizontally arranged and spliced at the same time, and the second group (lower left position) and the fourth group (upper right position) of superconducting tapes are vertically arranged and spliced at the same time, so that a square with the side length of the cross section of 3mm is finally obtained. The aluminum foil 3 is coated outside the superconducting tape 1, and the copper sheath 4 is sleeved outside the aluminum foil 3 to form the quasi-isotropic superconducting cable which is based on tape stacking and is provided with a low-temperature medium channel.
The quasi-isotropic superconducting cable structure based on the strip stacking and provided with the low-temperature medium channel expands the application range of the superconducting cable, and the structure of the quasi-isotropic superconducting cable based on the strip stacking and provided with the low-temperature medium channel has a plurality of advantages.
1. The superconducting cable structure is provided with a low-temperature medium channel, and heat generated by the superconducting strip 1 in the operation process can be timely transmitted to the low-temperature medium through the low-temperature medium channel, so that the stability of the superconducting cable in operation is improved.
2. In the superconducting cable structure, a superconducting tape 1 is arranged outside a hollow metal former 2. Compared with other arrangement modes, the arrangement mode reduces the influence of the magnetic field of the superconducting strip when the superconducting strip is electrified under the condition that the sectional areas of the superconducting strip 1 and the hollow metal framework 2 are not changed, so that larger critical current can be obtained.
3. In the superconducting cable structure, the groups of superconducting strips are arranged in a centrosymmetric mode, so that the current distribution in the superconducting cable is more uniform.
4. The superconducting cable structure comprises the hollow metal framework 2, and when system faults such as superconducting strip breakage and the like occur, the hollow metal framework 2 can play a shunting role, so that the reliability of the superconducting cable in operation is improved.
The quasi-isotropic superconducting cable based on the tape stacking and provided with the low-temperature medium channel solves the problem that the critical current density of the existing superconducting cable is too greatly attenuated under the action of a self-field, and has the advantages that the low-temperature medium channel provides a heat dissipation way for the superconducting tape, and the economy and the running stability of the superconducting cable are improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed herein should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
The principles and embodiments of the present invention have been described herein using specific examples, which are presented solely to aid in the understanding of the apparatus and its core concepts; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. Quasi-isotropic superconducting cable based on tape stacking and equipped with cryogenic medium channels, characterized in that it comprises: superconducting strips, hollow metal frameworks, metal foils and metal sheaths; the superconducting tapes comprise four groups of superconducting tapes with the same quantity, namely a first group of superconducting tapes, a second group of superconducting tapes, a third group of superconducting tapes and a fourth group of superconducting tapes; the first group of superconducting tapes and the third group of superconducting tapes are symmetrical about the center of the hollow metal skeleton; the second group of superconducting tapes and the fourth group of superconducting tapes are symmetrical about the center of the hollow metal skeleton; the first group of superconducting tapes are rotated by 90 degrees around the center of the hollow metal framework in a counterclockwise direction and then are overlapped with the second group of superconducting tapes; the metal foil is coated outside the superconducting tape; the metal sheath is sleeved on the outer side of the metal foil.
2. The tape stack-based quasi-isotropic superconducting cable equipped with cryogenic medium channels of claim 1, wherein the superconducting tapes are rectangular in cross-section and the metal foil is square in cross-section.
3. Quasi-isotropic superconducting cable based on tape stacking and equipped with cryogenic medium channels according to claim 1, characterized in that the hollow metal former is a copper former, an aluminum former or an alloy former.
4. The quasi-isotropic superconducting cable with tape stacks and cryogenic medium channels according to claim 3, wherein the hollow metal former is a cryogenic medium channel, and the passing cryogenic medium comprises liquid nitrogen, liquid helium, liquid hydrogen, liquid oxygen, liquefied natural gas, and the like.
5. The tape stack-based quasi-isotropic superconducting cable equipped with cryogenic medium channels of claim 1, wherein the metal foil is an aluminum foil, a copper foil, or an alloy foil.
6. Quasi-isotropic superconducting cable based on stacks of tapes and equipped with channels for cryogenic media according to claim 1, characterized in that said metallic sheath is a copper sheath, an aluminum sheath or an alloy sheath.
7. Quasi-isotropic superconducting cable based on tape stacking and equipped with cryogenic medium channels according to claim 1, characterized in that the hollow metal former and the metal sheath are circular in cross section; and a metal filler is filled between the hollow metal framework and the superconducting tape, and a metal filler is filled between the metal sheath and the metal foil.
8. Quasi-isotropic superconducting cable based on tape stacking and equipped with cryogenic medium channels according to claim 7, characterized in that the metallic filler is an aluminum filler or a copper filler.
9. Quasi-isotropic superconducting cable based on tape stacking and equipped with cryogenic medium channels according to claim 1, characterized in that the hollow metal former and the metal sheath are square in cross section.
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