CN116913642A - High-temperature superconducting energy storage magnet based on multilayer spiral superconducting bunched cable - Google Patents
High-temperature superconducting energy storage magnet based on multilayer spiral superconducting bunched cable Download PDFInfo
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- CN116913642A CN116913642A CN202311024172.8A CN202311024172A CN116913642A CN 116913642 A CN116913642 A CN 116913642A CN 202311024172 A CN202311024172 A CN 202311024172A CN 116913642 A CN116913642 A CN 116913642A
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- superconducting
- energy storage
- spiral
- bunched
- temperature superconducting
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- 238000004146 energy storage Methods 0.000 title claims abstract description 62
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052802 copper Inorganic materials 0.000 claims abstract description 13
- 239000010949 copper Substances 0.000 claims abstract description 13
- 238000004804 winding Methods 0.000 claims abstract description 12
- 229920006335 epoxy glue Polymers 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims 1
- 239000003365 glass fiber Substances 0.000 claims 1
- 229920000647 polyepoxide Polymers 0.000 claims 1
- 239000004020 conductor Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920006332 epoxy adhesive Polymers 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000017105 transposition Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910021521 yttrium barium copper oxide Inorganic materials 0.000 description 1
Classifications
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- 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
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- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/04—Cooling
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
The invention discloses a high-temperature superconductive energy storage magnet based on a multilayer spiral superconductive bunched cable, which comprises a central solenoid framework and an energy storage coil, wherein the central solenoid framework is of a hollow cylindrical structure, a spiral track is carved on the outer side surface of the cylindrical structure, the energy storage coil is formed by winding the multilayer spiral bunched cable, and the multilayer spiral bunched cable is arranged in the track; the multi-layer helical bundling cable comprises a central copper tube and a superconducting tape wound on the central copper tube at a given angle of incidence, pitch and tension. The invention can greatly improve the current carrying capacity of the energy storage magnet.
Description
Technical Field
The invention relates to a high-temperature superconducting energy storage magnet based on a multilayer spiral superconducting bunched cable, which is used in the field of superconducting energy storage.
Background
The challenges of energy gap and limiting greenhouse gas emissions in the world today place demands on integrating more renewable energy sources while improving the efficiency and operational capabilities of non-renewable energy sources and energy transfer systems. To achieve these goals, the safety and stability of the power grid is to be improved, while the energy storage system is critical to ensure high reliability, robustness and elasticity of the power system. In the prior energy storage technology, superconducting energy storage (superconducting magnetic energy storage, SMES) is a high-power storage technology with frequent, rapid and efficient charge and discharge, and has the advantages of high charge and discharge efficiency (more than 95%), rapid response (millisecond level), unlimited charge and discharge cycle times and the like.
The second generation high temperature superconductive tape has the advantages of high current carrying capacity and excellent electromagnetic property under external magnetic field, and becomes the main scheme of the current winding superconductive energy storage magnet. However, the maximum energy W that can be stored by superconducting energy storage depends on the inductance L and the current I of the energy storage magnet, as shown in the following equation:
to increase the capacity of superconducting energy storage, it is necessary to further increase the current carrying capacity of the superconducting energy storage magnet and increase the inductance of the magnet. However, the current carrying capability of a single second-generation high-temperature superconducting tape is limited, so that the combination of multiple superconducting tapes is wound into a high-temperature superconducting bunched cable with higher current carrying capability, stronger mechanical property and better electromagnetic property under an external magnetic field, and the use of the high-temperature superconducting bunched cable to wind the energy storage magnet is an important development trend for improving the industrial application feasibility of the high-temperature superconducting energy storage magnet.
Meanwhile, the high-temperature superconducting energy storage magnet has extremely high requirements on a refrigerating system, and the superconducting energy storage magnet is in a high-frequency charge-discharge working condition, so that the superconducting tape generates non-negligible alternating current loss. The existence of alternating current loss can cause equipment to generate heat, aggravate the refrigeration burden of system, and then influence the stability of energy storage magnet. Therefore, a cluster cable with smaller alternating current loss is needed to wind the high-temperature superconductive energy storage magnet.
Through searching, no patent is disclosed on the basis of the high-temperature superconductive energy storage magnet of the multilayer spiral superconductive bundling cable, but the patent relates to the design of optimizing the energy storage magnet from other aspects, such as the energy storage magnet of different types of high-temperature superconductive conductor designs, and the main contents are as follows:
patent: zhang Xindan et al, application publication No. CN 114743752A, application publication No. 2022.07.12, which uses quasi-isotropic conductors (QIS) to wrap around a high temperature superconducting energy storage magnet, have a relatively high engineering current density. However, the energy storage magnet adopts a copper framework, and additional alternating current loss can be generated. Meanwhile, the quasi-isotropic conductor has no additional refrigeration channel and has defects and potential safety hazards in application.
Patent: yu Xin et al, YBCO high temperature superconducting energy storage coil coiling method and device, application publication No. CN 114464445A, application publication No. 2022.05.10, this patent uses superconducting tape coiling "two cake" coils, divide into the magnetic field of energy storage magnet different regions, match the strip of different width for different regions, make full use of superconducting tape's performance, reduced the cost of energy storage magnet to a certain extent. However, the energy storage magnet is still limited by the current carrying capacity of the superconducting tape, and has no advantages in the current carrying capacity and the alternating current loss.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a high-temperature superconductive energy storage magnet based on a multilayer spiral superconductive bunched cable, which can greatly improve the current carrying capacity of the energy storage magnet.
The technical scheme for achieving the purpose is as follows: a high-temperature superconducting energy storage magnet based on a multilayer spiral superconducting bunched cable comprises a central solenoid skeleton and an energy storage coil;
the central solenoid skeleton is of a hollow cylindrical structure, a spiral track is carved on the outer side surface of the cylindrical structure, the energy storage coil is formed by winding a plurality of layers of spiral bunched cables, and the plurality of layers of spiral bunched cables are arranged in the track;
the multi-layer helical bundling cable comprises a central copper tube and a superconducting tape wound on the central copper tube at a given angle of incidence, pitch and tension.
Furthermore, the outer side of the central copper pipe is spirally wound with two high-temperature superconductive strips at a given incident angle, pitch and tension, and one high-temperature superconductive strip is covered on the surface of the other high-temperature superconductive strip.
Further, the winding directions of the two high-temperature superconductive tapes are opposite.
Further, an insulating tape is spirally wound on the outer side of the outermost high-temperature superconducting tape in a half-stacked manner.
Further, after the multi-layer spiral bunched cable is arranged in the track, heat-conducting epoxy glue is smeared on the surface of the multi-layer spiral bunched cable, and the multi-layer spiral bunched cable is fixed on the central solenoid through curing the heat-conducting epoxy glue.
Further, a refrigerating channel is reserved on the inner side of the central copper pipe.
Further, the central solenoid skeleton uses a G10 fiberglass epoxy insulating material.
Further, a plurality of central solenoid skeletons with different inner diameters are mutually sleeved.
Further, the outer diameter of the center solenoid frame sleeved on the inner side is smaller than the inner diameter of the center solenoid frame sleeved on the outer side.
The invention has the following advantages and technical effects:
the multi-layer spiral superconducting bunched cable used for winding the high-temperature superconducting energy storage magnet has extremely high current carrying capacity, and can greatly improve the current carrying capacity of the energy storage magnet.
Secondly, the multilayer spiral type bunched cable enables the superconducting tape to be subjected to a lower vertical magnetic field and a higher parallel magnetic field through the transposition structure, so that the superconducting tape has lower alternating current loss, and the burden of a refrigerating system is greatly reduced.
And thirdly, a refrigerating channel is reserved in the central skeleton circular tube of the multi-layer spiral bunched cable, so that the refrigerating difficulty of the magnet is reduced, and the safety and stability of the operation of the magnet are improved.
Generally, the design of the high-temperature superconductive energy storage magnet based on the multilayer spiral type bunched cable improves the economical efficiency, the safety and the industrial feasibility of the future practical energy storage magnet.
Drawings
FIG. 1 is a schematic diagram of a high temperature superconducting energy storage magnet based on a multilayer helical superconducting bundling cable;
FIG. 2 is a schematic view of a multi-layered helical bundling cable structure;
FIG. 3 is a schematic cross-sectional view of a central solenoid armature;
FIG. 4 is a schematic cross-sectional view of a high temperature superconducting energy storage magnet based on a multilayer helical superconducting bundling cable;
FIG. 5 is a schematic diagram of an energy storage magnet assembly;
fig. 6 is a schematic cross-sectional view of a high capacity combined energy storage magnet.
Detailed Description
In order to better understand the technical solution of the present invention, the following detailed description is given by way of specific examples:
referring to fig. 1, a high-temperature superconducting energy storage magnet based on a multi-layer spiral superconducting cluster cable of the present invention is formed by winding a multi-layer spiral cluster cable 1 on a central solenoid skeleton 2.
The structure of the multi-layered helical bundle cable is shown in fig. 2. 101 is a central copper tube providing support and cooling channels. 102 and 103 are second generation high temperature superconducting tapes helically wound on a center copper tube at a given angle of incidence, pitch and tension. The winding direction of the superconducting tapes of two adjacent layers is generally opposite. Reference numeral 104 denotes an insulating tape spirally wound on the outermost superconducting tape in a half-lap manner.
Referring to fig. 3, the central solenoid skeleton is a hollow cylindrical structure, and a spiral track is engraved on an outer side surface of the cylindrical structure. The inner diameter of the central solenoid skeleton is phi in An outer diameter of phi out 。
Referring to fig. 4, a multi-layer spiral bunched cable 1 is disposed in a track of a central solenoid skeleton 2, and then a heat-conducting epoxy adhesive 3 is sprayed in the track. And (3) waiting for curing the heat-conducting epoxy glue, fixing the multi-layer spiral bundling cable 1 in the U-shaped track of the central solenoid skeleton 2, and finishing winding of the energy storage coil. Preferably, the heat-conducting epoxy adhesive can be Stykast 2850 with low thermal expansion coefficient, good heat conduction performance and high electric insulation strength.
Optionally, after winding the plurality of energy storage coils, as shown in fig. 5, taking two energy storage coils with different diameters as an example, the outer diameter Φ1 is out Is placed in an inner diameter phi 2 in Similarly, a combined energy storage magnet of greater capacity as shown in fig. 6 may be further constructed.
In various high-temperature superconducting bunched cables, the multilayer spiral bunched cable spirally winds the superconducting tapes on the circular tube type central framework at a given incident angle, pitch and tension, so that the combination of a plurality of superconducting tapes is realized, the industrial production is relatively easy in theory, the multilayer spiral bunched cable has high current carrying capacity and low inductance, and isotropy is realized facing an external magnetic field. Meanwhile, compared with a high-temperature superconducting tape with the same critical current, the multi-layer spiral type bunched cable has the advantage of lower alternating current loss because the superconducting tape is subjected to a lower perpendicular magnetic field and a higher parallel magnetic field through a transposition structure. In addition, the central skeleton circular tube of the multi-layer spiral bunched cable reserves a refrigerating channel, so that the refrigerating difficulty of the magnet is reduced, and the safety and stability of the operation of the magnet are improved. Thus, a multi-layered helical bundling cable is suitable for winding superconducting energy storage magnets.
It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration only and not for limitation of the invention, and that variations and modifications of the above described embodiments are intended to fall within the scope of the claims of the invention as long as they fall within the true spirit of the invention.
Claims (9)
1. A high-temperature superconducting energy storage magnet based on a multilayer spiral superconducting bunched cable comprises a central solenoid skeleton and an energy storage coil, and is characterized in that:
the central solenoid skeleton is of a hollow cylindrical structure, a spiral track is carved on the outer side surface of the cylindrical structure, the energy storage coil is formed by winding a plurality of layers of spiral bunched cables, and the plurality of layers of spiral bunched cables are arranged in the track;
the multi-layer helical bundling cable comprises a central copper tube and a superconducting tape wound on the central copper tube at a given angle of incidence, pitch and tension.
2. The high-temperature superconducting energy storage magnet based on the multilayer spiral superconducting bunched cable according to claim 1, wherein two high-temperature superconducting tapes are spirally wound on the outer side of the central copper pipe at a given incidence angle, pitch and tension, and one high-temperature superconducting tape is covered on the surface of the other superconducting tape.
3. The high-temperature superconducting energy storage magnet based on the multilayer spiral superconducting bunched cable according to claim 2, wherein the winding directions of the two high-temperature superconducting tapes are opposite.
4. The high-temperature superconducting energy storage magnet based on the multilayer spiral superconducting bunched cable according to claim 2, wherein an insulating tape is spirally wound on the outer side of the outermost high-temperature superconducting tape in a half-stacked manner.
5. The high-temperature superconducting energy storage magnet based on the multilayer spiral superconducting bunched cable according to claim 1, wherein after the multilayer spiral superconducting bunched cable is arranged in the track, heat-conducting epoxy glue is smeared on the surface of the multilayer spiral superconducting bunched cable, and the multilayer spiral superconducting bunched cable is fixed on the central solenoid through curing the heat-conducting epoxy glue.
6. The high-temperature superconducting energy storage magnet based on the multilayer spiral superconducting bunched cable according to claim 1, wherein a refrigerating channel is reserved on the inner side of the central copper tube.
7. The high-temperature superconducting energy storage magnet based on a multilayer spiral superconducting bundling cable according to claim 1, wherein the central solenoid skeleton is made of G10 glass fiber epoxy resin insulating material.
8. The high-temperature superconducting energy storage magnet based on a multilayer spiral superconducting bunched cable according to claim 1, wherein a plurality of central solenoid skeletons with different inner diameters are mutually sleeved.
9. The high-temperature superconducting energy storage magnet based on the multilayer spiral superconducting bundling cable according to claim 8, wherein the outer diameter of the central solenoid skeleton sleeved on the inner side is smaller than the inner diameter of the central solenoid skeleton sleeved on the outer side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311024172.8A CN116913642A (en) | 2023-08-15 | 2023-08-15 | High-temperature superconducting energy storage magnet based on multilayer spiral superconducting bunched cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311024172.8A CN116913642A (en) | 2023-08-15 | 2023-08-15 | High-temperature superconducting energy storage magnet based on multilayer spiral superconducting bunched cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116913642A true CN116913642A (en) | 2023-10-20 |
Family
ID=88358342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311024172.8A Pending CN116913642A (en) | 2023-08-15 | 2023-08-15 | High-temperature superconducting energy storage magnet based on multilayer spiral superconducting bunched cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116913642A (en) |
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2023
- 2023-08-15 CN CN202311024172.8A patent/CN116913642A/en active Pending
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