CN113948251A - Insulation structure of superconducting cable - Google Patents
Insulation structure of superconducting cable Download PDFInfo
- Publication number
- CN113948251A CN113948251A CN202111218158.2A CN202111218158A CN113948251A CN 113948251 A CN113948251 A CN 113948251A CN 202111218158 A CN202111218158 A CN 202111218158A CN 113948251 A CN113948251 A CN 113948251A
- Authority
- CN
- China
- Prior art keywords
- layer
- superconducting
- insulation structure
- superconducting cable
- shielding layer
- 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.)
- Granted
Links
Images
Classifications
-
- 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
-
- 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
- H01B12/06—Films or wires on bases or cores
-
- 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
- H01B12/16—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by cooling
-
- 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
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
The invention relates to the technical field of superconducting cables, and provides an insulation structure of a superconducting cable, which comprises a framework, a superconducting layer and an insulation layer, wherein the framework, the superconducting layer and the insulation layer are sequentially arranged from inside to outside; a semiconductor shielding layer is arranged between the superconducting layer and the insulating layer; a first flow channel is arranged in the framework along the axis direction, a second flow channel is formed between the insulating layer and the semiconductor shielding layer, and the first flow channel and the second flow channel are respectively circulation channels of cooling media; the outer surface of the semiconductor shielding layer is provided with a plurality of ceramic particle layers at intervals along the axial direction, and a micro guide channel is formed between two adjacent ceramic particle layers. The insulation structure of the superconducting cable can increase the dielectric constant of the semiconductor shielding layer, prevent the breakdown effect and improve the heat exchange efficiency.
Description
Technical Field
The invention relates to the technical field of superconducting cables, in particular to an insulation structure of a superconducting cable.
Background
Superconducting materials are materials that exhibit zero resistance and repel magnetic lines at a low temperature that varies from material to material, which is called the critical temperature. The superconducting cable is designed and manufactured by utilizing the characteristics that a superconducting material becomes a superconducting state at the critical temperature, the resistance disappears, the loss is extremely low, the current density is high, and the superconducting cable can bear large current. The transmission capacity of the cable far exceeds that of an oil-filled cable and is also larger than that of a low-temperature cable, and the transmission capacity can reach more than 10000MVA, so that the cable is a novel cable which is being researched and developed vigorously. Since the critical temperature of superconductors is generally below 20K, superconducting cables typically operate in 4.2K of liquid helium.
At present, the demand of China for electric power is increasing, and the transmission capacity and the transmission distance of an electric power system need to be increased. Conventional cables are made of copper or aluminum and have a line loss of about 15% during transmission. Line loss in the annual power transmission process in china exceeds billions of kilowatt-hours. Compared with the traditional cable, the high-temperature superconducting cable has the advantages of large capacity, low loss, small volume, light weight, high system reliability, resource saving, environmental friendliness and the like. With the development of superconducting technology, high temperature superconducting cables and high temperature superconducting current limiters are considered as superconducting devices most likely to be commercially applied in power systems in the first place. The development of high-temperature superconducting cables in the world is divided into three important stages of demonstration, sample and industrial application, the high-temperature superconducting cables enter the initial development stage of industrial application at present, the requirements on the length of the high-temperature superconducting cables are continuously increased, the requirements on voltage resistance are continuously improved, and the requirements on current circulation are continuously increased.
With the development of high-temperature superconducting materials and corresponding technologies, the manufacturing of high-temperature superconducting cables has already provided a necessary foundation. Due to the relative improvement of the working temperature area, the transmission cost of the cable made of the high-temperature superconducting material is lower than that of the traditional cable, and the cable has outstanding superiority when being used for direct-current transmission. The many advantages of high temperature superconducting cables dictate that they will be widely used in the near future.
In the design of a great number of superconducting cables in the prior art, an insulating layer wraps the outer side of a superconducting layer, a gap often exists between the insulating layer and the superconducting layer, the gap easily causes a breakdown effect, and the normal operation of the cable is not facilitated.
Disclosure of Invention
The present invention provides an insulation structure of a superconducting cable, which can increase the dielectric constant of a semiconductor shielding layer, prevent a breakdown effect and improve heat exchange efficiency.
In order to solve the technical problem, the invention provides an insulation structure of a superconducting cable, which comprises a framework, a superconducting layer and an insulation layer, wherein the framework, the superconducting layer and the insulation layer are sequentially arranged from inside to outside; a semiconductor shielding layer is arranged between the superconducting layer and the insulating layer; a first flow channel is arranged in the framework along the axis direction, a second flow channel is formed between the insulating layer and the semiconductor shielding layer, and the first flow channel and the second flow channel are respectively circulation channels of cooling media; the outer surface of the semiconductor shielding layer is provided with a plurality of ceramic particle layers at intervals along the axial direction, and a micro guide channel is formed between two adjacent ceramic particle layers.
Preferably, the ceramic particle layers are uniformly arranged in a wave shape or a straight line shape.
Preferably, the ceramic particle layer is composed of a plurality of ceramic particles, and the particle size of the ceramic particles is 10-120 μm.
Preferably, the ceramic particles are made of silicon dioxide, aluminum oxide or silicon carbide.
Preferably, the ceramic particles are embedded at one end into an outer surface of the semiconducting shield layer and at the other end in contact with the cooling medium.
Preferably, the superconducting layer includes a first superconducting tape and a second superconducting tape, and the first superconducting tape and the second superconducting tape are respectively wound around the former in a spiral manner in opposite directions.
Preferably, the skeleton is a flexible bellows structure.
Preferably, the insulating layer is an insulating film.
Preferably, the insulating film is a polyimide film, a polypropylene composite fiber film or a polyester film.
Preferably, the semiconductive shielding layer is made of semiconductive fiber material.
Preferably, the framework is made of stainless steel, copper or aluminum.
Preferably, the cooling medium flows in from the first flow passage and flows out from the second flow passage or flows in from the second flow passage and flows out from the first flow passage.
The invention has the following beneficial effects:
according to the invention, the ceramic particle layer is arranged outside the semiconductor shielding layer, the ceramic particle layer can increase the dielectric constant of the semiconductor shielding layer, specifically, the insulating layer wraps the outer side of the superconducting layer, and the gap between the insulating layer and the superconducting layer easily causes the dielectric constant of the semiconductor shielding layer coated with the ceramic particle layer in the breakdown effect to increase, so that the breakdown effect can be prevented; meanwhile, the ceramic particle layer can increase the contact area with the cooling medium, the temperature of the semiconductor shielding layer is rapidly exchanged with the cooling medium, and the heat exchange effect is improved.
Drawings
Fig. 1 is a schematic structural view of an insulation structure of a superconducting cable provided by an embodiment of the present invention;
FIG. 2 is a layout view of a layer of ceramic particles provided by an embodiment of the present invention;
fig. 3 is another arrangement of layers of ceramic particles provided by an embodiment of the present invention.
Reference numerals:
1. a framework; 2. a superconducting layer; 3. an insulating layer; 4. a semiconductor shielding layer; 5. a layer of ceramic particles.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1, a preferred embodiment of the present invention provides an insulation structure of a superconducting cable, including a former 1, a superconducting layer 2, and an insulation layer 3, which are sequentially arranged from inside to outside; a semiconductor shielding layer 4 is arranged between the superconducting layer 2 and the insulating layer 3; a first flow channel is arranged in the framework 1 along the axis direction, a second flow channel is formed between the insulating layer 3 and the semiconductor shielding layer 4, and the first flow channel and the second flow channel are respectively flow channels of cooling media; the outer surface of the semiconductor shielding layer is provided with a plurality of ceramic particle layers 5 at intervals along the axial direction, and a micro guide channel is formed between two adjacent ceramic particle layers 5.
Referring to fig. 2 and 3, in some preferred embodiments of the present invention, the ceramic particle layers 5 are uniformly arranged in a wave shape or a straight line shape. Specifically, adopt wavy line and linear ceramic grained layer 5, can be more abundant heat transfer when contacting with cooling medium, and keep the uniformity of 4 temperatures in semiconductor shielding layer, avoid the difference in temperature too big, guarantee dielectric constant's uniformity, further improve the anti-breakdown effect.
In some preferred embodiments of the present invention, the ceramic particle layer 5 is composed of a plurality of ceramic particles having a particle size ranging from 10 to 120 μm. Specifically, the ceramic particles can increase the dielectric constant of the shielding layer, the insulating layer 3 is wrapped outside the superconducting layer 2, and the gap between the insulating layer 3 and the superconducting layer 2 easily causes the dielectric constant of the shielding layer coated with the ceramic particles to increase, so that the breakdown effect can be prevented. Too large particle size easily affects mounting dimensions, too small particle size, and insignificant change in dielectric constant.
In some preferred embodiments of the present invention, the ceramic particles are made of silicon dioxide, aluminum oxide or silicon carbide. Specifically, the ceramic particles are made of aluminum oxide, silicon oxide or silicon carbide, and are coated on the semiconductor shielding layer 4 by combining with epoxy resin, wherein the epoxy resin accounts for about 10-20%. In addition, ceramic materials refer to a class of inorganic non-metallic materials made from natural or synthetic compounds through shaping and high temperature sintering. It has the advantages of high melting point, high hardness, high wear resistance, oxidation resistance, etc. and may be used as functional material owing to the special performance of ceramic. The ceramic material particles are preferably silicon dioxide, aluminum oxide or silicon carbide.
In some preferred embodiments of the present invention, one end of the ceramic particles is embedded in the outer surface of the semiconductor shielding layer 4 and the other end is in contact with the cooling medium. Specifically, one end of the ceramic particles is embedded into the semiconductor shielding layer 4, and the other end of the ceramic particles is embedded into the cooling medium, so that the contact area between the ceramic particles and the semiconductor shielding layer 4 is increased, and the heat exchange efficiency is further improved.
In some preferred embodiments of the present invention, the superconducting layer 2 includes a first superconducting tape and a second superconducting tape, which are respectively wound around the former 1 in a spiral manner in opposite directions.
In some preferred embodiments of the present invention, the framework 1 is a flexible bellows structure. Specifically, the expansion and contraction phenomenon due to temperature change can be prevented.
In some preferred embodiments of the present invention, the insulating layer 3 is an insulating film.
In some preferred embodiments of the present invention, the insulating film is a polyimide film, a polypropylene composite fiber film, or a polyester film.
In some preferred embodiments of the present invention, the semiconducting fiber material is used for the semiconducting shielding layer 4.
In some preferred embodiments of the present invention, the frame 1 is made of stainless steel, copper or aluminum.
In some preferred embodiments of the present invention, the cooling medium flows in from the first flow passage and flows out from the second flow passage or flows in from the second flow passage and flows out from the first flow passage.
To sum up, preferred embodiments of the present invention provide an insulation structure of a superconducting cable, which is compared with the prior art:
according to the invention, the ceramic particle layer 5 is arranged outside the semiconductor shielding layer 4, the ceramic particle layer 5 can increase the dielectric constant of the semiconductor shielding layer 4, specifically, the insulating layer 3 is wrapped outside the superconducting layer 2, and the gap between the insulating layer 3 and the superconducting layer 2 can easily cause the dielectric constant of the semiconductor shielding layer 4 coated with the ceramic particle layer 5 to increase, so that the breakdown effect can be prevented; meanwhile, the ceramic particle layer 5 can increase the contact area with a cooling medium, the temperature of the semiconductor shielding layer 4 is rapidly exchanged with the cooling medium, and the heat exchange effect is improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. An insulation structure of a superconducting cable is characterized by comprising a framework, a superconducting layer and an insulation layer which are sequentially arranged from inside to outside;
a semiconductor shielding layer is arranged between the superconducting layer and the insulating layer;
a first flow channel is arranged in the framework along the axis direction, a second flow channel is formed between the insulating layer and the semiconductor shielding layer, and the first flow channel and the second flow channel are respectively circulation channels of cooling media;
the outer surface of the semiconductor shielding layer is provided with a plurality of ceramic particle layers at intervals along the axial direction, and a micro guide channel is formed between two adjacent ceramic particle layers.
2. An insulation structure of a superconducting cable according to claim 1, wherein: the ceramic particle layers are uniformly arranged in a wave shape or a straight line shape.
3. An insulation structure of a superconducting cable according to claim 1, wherein: the ceramic particle layer is composed of a plurality of ceramic particles, and the particle size range of the ceramic particles is 10-120 mu m.
4. A superconducting cable insulation structure of claim 3, wherein: the ceramic particles are made of silicon dioxide, aluminum oxide or silicon carbide.
5. A superconducting cable insulation structure of claim 3, wherein: one end of the ceramic particles is embedded into the outer surface of the semiconductor shielding layer, and the other end of the ceramic particles is in contact with the cooling medium.
6. An insulation structure of a superconducting cable according to claim 1, wherein: the superconducting layer includes a first superconducting tape and a second superconducting tape, which are spirally wound around the former in opposite directions, respectively.
7. An insulation structure of a superconducting cable according to claim 1, wherein: the framework is in a flexible corrugated pipe structure.
8. An insulation structure of a superconducting cable according to claim 1, wherein: the insulating layer is made of an insulating film.
9. An insulation structure of a superconducting cable according to claim 8, wherein: the insulating film is a polyimide film, a polypropylene composite fiber film or a polyester film.
10. An insulation structure of a superconducting cable according to claim 1, wherein: the semiconductor shielding layer is made of a semiconductive fiber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111218158.2A CN113948251B (en) | 2021-10-19 | 2021-10-19 | Insulating structure of superconducting cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111218158.2A CN113948251B (en) | 2021-10-19 | 2021-10-19 | Insulating structure of superconducting cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113948251A true CN113948251A (en) | 2022-01-18 |
| CN113948251B CN113948251B (en) | 2023-10-10 |
Family
ID=79331539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111218158.2A Active CN113948251B (en) | 2021-10-19 | 2021-10-19 | Insulating structure of superconducting cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113948251B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023174259A1 (en) * | 2022-03-14 | 2023-09-21 | 吉林省中赢高科技有限公司 | Connector assembly having solid-state cooling medium, and vehicle |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63259918A (en) * | 1987-04-15 | 1988-10-27 | Fujikura Ltd | Superconductive cable |
| US5336851A (en) * | 1989-12-27 | 1994-08-09 | Sumitomo Electric Industries, Ltd. | Insulated electrical conductor wire having a high operating temperature |
| CN1855317A (en) * | 2005-04-27 | 2006-11-01 | 尼克桑斯公司 | Superconducting cable |
| US20130196857A1 (en) * | 2010-05-10 | 2013-08-01 | International Superconductivity Technology Center | Superconducting cable |
| CN105623156A (en) * | 2015-12-28 | 2016-06-01 | 深圳清华大学研究院 | Polymer-based hybrid membrane and preparation method and application thereof |
| CN109065257A (en) * | 2018-08-27 | 2018-12-21 | 广东电网有限责任公司 | A kind of double-deck electromagnetic shielding high-temperature superconductive cable |
| CN110299228A (en) * | 2019-06-28 | 2019-10-01 | 东部超导科技（苏州）有限公司 | A kind of cold insulation direct-current high-temperature superconducting current limliting cable |
| CN110911046A (en) * | 2019-12-11 | 2020-03-24 | 广东电网有限责任公司 | Current-limiting type high-temperature superconducting cable |
| CN113077935A (en) * | 2021-03-23 | 2021-07-06 | 广东电网有限责任公司电力科学研究院 | Superconducting cable refrigeration medium spiral transmission structure and superconducting cable |
-
2021
- 2021-10-19 CN CN202111218158.2A patent/CN113948251B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63259918A (en) * | 1987-04-15 | 1988-10-27 | Fujikura Ltd | Superconductive cable |
| US5336851A (en) * | 1989-12-27 | 1994-08-09 | Sumitomo Electric Industries, Ltd. | Insulated electrical conductor wire having a high operating temperature |
| CN1855317A (en) * | 2005-04-27 | 2006-11-01 | 尼克桑斯公司 | Superconducting cable |
| US20130196857A1 (en) * | 2010-05-10 | 2013-08-01 | International Superconductivity Technology Center | Superconducting cable |
| CN105623156A (en) * | 2015-12-28 | 2016-06-01 | 深圳清华大学研究院 | Polymer-based hybrid membrane and preparation method and application thereof |
| CN109065257A (en) * | 2018-08-27 | 2018-12-21 | 广东电网有限责任公司 | A kind of double-deck electromagnetic shielding high-temperature superconductive cable |
| CN110299228A (en) * | 2019-06-28 | 2019-10-01 | 东部超导科技（苏州）有限公司 | A kind of cold insulation direct-current high-temperature superconducting current limliting cable |
| CN110911046A (en) * | 2019-12-11 | 2020-03-24 | 广东电网有限责任公司 | Current-limiting type high-temperature superconducting cable |
| CN113077935A (en) * | 2021-03-23 | 2021-07-06 | 广东电网有限责任公司电力科学研究院 | Superconducting cable refrigeration medium spiral transmission structure and superconducting cable |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023174259A1 (en) * | 2022-03-14 | 2023-09-21 | 吉林省中赢高科技有限公司 | Connector assembly having solid-state cooling medium, and vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113948251B (en) | 2023-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5981414B2 (en) | Superconducting cable fixing structure and superconducting cable line fixing structure | |
| US3725565A (en) | Expansion member for superconducting cable | |
| US20140118946A1 (en) | High-power electromagnetic assembly | |
| JP2006032186A (en) | Dc superconductive power transmission cable and power transmission system | |
| US20070029104A1 (en) | Superconductor cable | |
| JP2018530853A (en) | Superconducting wire | |
| WO2010042259A1 (en) | Superconductor cable | |
| JP2017527974A (en) | Superconducting cable | |
| US9570214B2 (en) | Superconducting cable line | |
| CN113948251A (en) | Insulation structure of superconducting cable | |
| CN1230835C (en) | Thermal insulative high-temperature superconductive cable with double-layer cooling channel structure | |
| CN109065257A (en) | A kind of double-deck electromagnetic shielding high-temperature superconductive cable | |
| CN110911046A (en) | Current-limiting type high-temperature superconducting cable | |
| CN218351181U (en) | High-temperature superconductive cable structure | |
| CN113470889A (en) | Stacked superconducting cable | |
| CN113077935B (en) | Superconducting cable refrigeration medium spiral transmission structure and superconducting cable | |
| CN110931162A (en) | Self-shielding cold insulation direct current high-temperature superconducting current-limiting cable | |
| US9640309B2 (en) | Superconducting DC reactor | |
| WO1999028929A1 (en) | A power transformer | |
| CN112151218B (en) | CORC superconducting cable electrifying conductor | |
| CN113363010A (en) | Stepped high-temperature superconducting CICC conductor with high current carrying capacity | |
| WO1999028921A1 (en) | Magnetic energy storage | |
| CN113990579A (en) | Superconducting cable based on low-temperature heat pipe and liquid hydrogen power system | |
| CN112435799A (en) | Three-phase coaxial superconducting cable current-carrying conductor cooling structure and superconducting cable current-carrying conductor | |
| KR102608511B1 (en) | Vacuum Insulation Part Dividing Device And Superconducting Cable Having The Same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |