CN110911046A - Current-limiting type high-temperature superconducting cable - Google Patents
Current-limiting type high-temperature superconducting cable Download PDFInfo
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- CN110911046A CN110911046A CN201911269386.5A CN201911269386A CN110911046A CN 110911046 A CN110911046 A CN 110911046A CN 201911269386 A CN201911269386 A CN 201911269386A CN 110911046 A CN110911046 A CN 110911046A
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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
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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
- H01B12/16—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by cooling
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- 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
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Abstract
The embodiment of the application discloses a current-limiting type high-temperature superconducting cable, which comprises: the framework, the conductor layer, the insulating layer, the shielding layer and the protective layer are arranged from inside to outside in sequence; the conductor layer comprises a plurality of layers of first high-temperature superconducting tapes; spirally winding and connecting a plurality of layers of first high-temperature superconducting tapes along the length direction; the spiral winding angles of the first high-temperature superconducting tapes on each layer are different; the critical current of each layer of the first high-temperature superconducting tape is different; the first high temperature superconducting tapes of each layer are insulated. The invention effectively increases the current-limiting impedance change rate and the current-limiting impedance of the superconducting cable, so that the superconducting cable has the characteristic of limiting fault current on the basis of being capable of transmitting large current, and is a high-quality current-limiting type high-temperature superconducting cable.
Description
Technical Field
The application relates to the technical field of superconducting cables, in particular to a current-limiting type high-temperature superconducting cable.
Background
The continuous improvement of the requirements of people on the quality of life leads to the fact that the power load in urban areas is heavier and heavier, the power electronic load is larger and larger, and the access of a large amount of new energy sources requires a power system to have larger transmission capacity and improve the power supply reliability. The high-temperature superconducting cable utilizes the unique excellent characteristics of the superconductor, has the advantages of small transmission impedance, large transmission capacity, low energy consumption, compact structure, small size, small reactive requirement of a line and the like compared with the traditional cable, and can have larger transmission capacity, smaller line loss and electromagnetic heat loss and less installation space under lower voltage level. In the future, high temperature superconducting cables are one of the promising development directions.
With the continuous development of high-temperature superconducting power technology, more and more novel high-temperature superconducting power equipment is developed, and part of the high-temperature superconducting power equipment is hung on a net for demonstration operation. At present, the research of the high-temperature superconducting cable pays attention to not only single-machine equipment such as a cable body and matched refrigeration equipment, but also the application of the cable in a system, so that the advantages of the high-temperature superconductor need to be fully explored, the high-temperature superconducting cable not only can transmit large current, but also has the characteristic of limiting fault current, and simultaneously has the functions of two superconducting power equipment such as the superconducting cable and a superconducting current limiter. However, the current limiting type high-temperature superconducting cable is technically not mature enough, the problems of low current limiting impedance change rate and low current limiting impedance are faced, most of research on the current limiting cable is only limited to simple laboratory experimental research and simulation research, further research is needed in actual engineering application, research and development of the current limiting superconducting cable are yet to be broken through, and therefore the invention provides the current limiting type high-temperature superconducting cable.
Disclosure of Invention
The embodiment of the application provides a current-limiting type high-temperature superconducting cable, so that the current-limiting impedance change rate and the current-limiting impedance of the superconducting cable are effectively increased, and the superconducting cable further has the characteristic of limiting fault current on the basis of being capable of transmitting large current.
In view of the above, the present application provides a current limiting type high temperature superconducting cable, comprising: the framework, the conductor layer, the insulating layer, the shielding layer and the protective layer are arranged from inside to outside in sequence;
the conductor layer comprises a plurality of layers of first high temperature superconducting tapes;
the first high-temperature superconducting tapes are spirally wound along the length direction in multiple layers;
the spiral winding angles of each layer of the first high-temperature superconducting tape are different;
the critical current of each layer of the first high-temperature superconducting tape is different;
and the first high-temperature superconducting tapes are insulated from each other.
Optionally, the plurality of layers of the first high temperature superconducting tapes are spirally wound on the framework at a preset winding angle.
Optionally, the shielding layer comprises a plurality of layers of second high temperature superconducting tapes;
and the second high-temperature superconducting tapes are insulated from each other.
Optionally, the plurality of layers of second high temperature superconducting tapes are spirally wound outside the insulating layer at a preset winding angle.
Optionally, the spiral winding angles of each layer of the second high temperature superconducting tape are equal.
Optionally, an inner surface of the insulating layer is provided with a first semiconducting layer.
Optionally, the outer surface of the insulating layer is provided with a second semiconducting layer.
Optionally, the skeleton is made of copper strands.
Optionally, the protective layer comprises a thermal insulation layer and a protective sleeve;
the protective sleeve is located outside the heat insulating layer.
Optionally, the thermal insulation layer is a double-layer metal bellows.
According to the technical scheme, the embodiment of the application has the following advantages: the superconducting cable comprises a framework, a conductor layer, an insulating layer, a shielding layer and a protective layer, wherein the framework, the conductor layer, the insulating layer, the shielding layer and the protective layer are sequentially arranged from inside to outside, the conductor layer comprises multiple layers of first high-temperature superconducting strips, the multiple layers of first high-temperature superconducting strips are spirally wound along the length direction, the spiral winding direction angles of the first high-temperature superconducting strips are unequal, the critical currents of the first high-temperature superconducting strips are unequal, the first high-temperature superconducting strips are insulated from one another, the superconducting strips with different critical currents are wound by the multiple layers of first high-temperature superconducting strips, the winding direction angles are changed along the length direction, the quenching speed of the superconducting cable is accelerated, the current-limiting impedance change rate and the current-limiting impedance of the superconducting cable are increased, and the superconducting cable further has the characteristic of limiting fault current on the basis of being.
Drawings
Fig. 1 is a schematic structural view of a current-limiting type high-temperature superconducting cable in an embodiment of the present application;
wherein the reference numerals are:
1-framework, 2-conductor layer, 3-insulating layer, 4-shielding layer and 5-protective layer.
Detailed Description
In order to make the technical solutions of the present application better understood, 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 should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; 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.
The present application provides an embodiment of a current-limiting type high-temperature superconducting cable, and particularly refers to fig. 1.
The current limiting type high temperature superconducting cable in the present embodiment includes: the framework 1, the conductor layer 2, the insulating layer 3, the shielding layer 4 and the protective layer 5 are sequentially arranged from inside to outside, the conductor layer 2 comprises multiple layers of first high-temperature superconducting strips, the multiple layers of first high-temperature superconducting strips are spirally wound along the length direction, the spiral winding angles of the first high-temperature superconducting strips on each layer are unequal, the critical current of the first high-temperature superconducting strips on each layer is unequal, and the first high-temperature superconducting strips on each layer are insulated.
It should be noted that: the superconducting cable is characterized in that a framework 1, a conductor layer 2, an insulating layer 3, a shielding layer 4 and a protective layer 5 are sequentially arranged from inside to outside, the conductor layer 2 comprises a plurality of layers of first high-temperature superconducting strips, the plurality of layers of first high-temperature superconducting strips are spirally wound in the length direction, the spiral winding angles of the first high-temperature superconducting strips are different, the critical currents of the first high-temperature superconducting strips are different, the first high-temperature superconducting strips are insulated, the layers of the first high-temperature superconducting strips adopt superconducting strips with different critical currents, and the winding angles are changed in the length direction, so that the quenching speed of the superconducting cable is increased, the impedance change rate and the current-limiting impedance of the current-limiting cable are increased, and the superconducting cable further has the characteristic of limiting fault current on the basis of being capable of transmitting large current.
The above is a first embodiment of the current-limiting type high-temperature superconducting cable provided in the embodiments of the present application, and the following is a second embodiment of the current-limiting type high-temperature superconducting cable provided in the embodiments of the present application, specifically referring to fig. 1.
The current limiting type high temperature superconducting cable in the present embodiment includes: the structure comprises a framework 1, a conductor layer 2, an insulating layer 3, a shielding layer 4 and a protective layer 5 which are arranged from inside to outside in sequence; the conductor layer 2 comprises a plurality of layers of first high temperature superconducting tapes; spirally winding and connecting a plurality of layers of first high-temperature superconducting tapes along the length direction; the spiral winding angles of the first high-temperature superconducting tapes on each layer are different; the critical current of each layer of the first high-temperature superconducting tape is different; the first high-temperature superconducting tapes on each layer are insulated, and particularly, the insulating coating treatment is carried out between the first high-temperature superconducting tapes.
It should be noted that: the conductor layer 2 is formed by spirally winding a plurality of layers of first high-temperature superconducting tapes with different critical currents, so that the quench speed of the superconducting tape layer with small critical current is accelerated, and the rising rate of the current-limiting impedance is increased.
The multilayer first high temperature superconducting tape is spirally wound on the framework 1 at a preset winding angle. Specifically, the first high temperature superconducting tape of the conductor layer 2 may be wound at different winding angles at different positions extending in the length direction of the superconducting cable, so that the current limiting impedance of the superconducting cable may be adjusted and matched.
The shielding layer 4 comprises a plurality of layers of second high-temperature superconducting tapes, and each layer of the second high-temperature superconducting tapes is insulated, and specifically, the layers of the second high-temperature superconducting tapes are subjected to insulation coating treatment; a plurality of layers of second high-temperature superconducting tapes are spirally wound and connected on the outer side of the insulating layer 3 at preset winding angles; the spiral winding angles of the second high-temperature superconducting tapes of each layer are equal. The mutual inductance generated in this way can play a role in limiting current in the process of high-current impact.
The internal surface of insulating layer 3 is provided with first semiconducting layer, can even 2 surface electric fields in the conductive layer, avoids causing conductive layer 2 and insulating layer 3 to take place partial discharge because of the conductive layer 2 surface is not smooth.
The outer surface of the insulating layer 3 is provided with a second semi-conducting layer which is in good contact with the outer surface of the insulating layer 3 and has the same potential as the shielding layer 4, so that partial discharge between the second semi-conducting layer and the shielding layer 4 due to defects such as cracks on the insulating surface of the cable can be avoided.
The former 1 is made of copper stranded wire as a support for the superconducting cable.
The protective layer 5 includes a heat insulating layer and a protective jacket, which is located outside the heat insulating layer. The heat insulating layer may be a double-layer metal bellows. The superconducting cable conductor is thermally insulated from the external environment, and the superconducting cable conductor is ensured to operate in a low-temperature environment.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A current limiting type high temperature superconducting cable, comprising: the framework, the conductor layer, the insulating layer, the shielding layer and the protective layer are arranged from inside to outside in sequence;
the conductor layer comprises a plurality of layers of first high temperature superconducting tapes;
the first high-temperature superconducting tapes are spirally wound along the length direction in multiple layers;
the spiral winding angles of each layer of the first high-temperature superconducting tape are different;
the critical current of each layer of the first high-temperature superconducting tape is different;
and the first high-temperature superconducting tapes are insulated from each other.
2. A current limiting type hts cable according to claim 1 wherein the multilayer first hts tape is spirally wound on the former at a preset winding angle.
3. A current limiting type hts cable according to claim 1, characterized in that the shielding layer comprises multiple layers of second hts tape;
and the second high-temperature superconducting tapes are insulated from each other.
4. A current limiting type hts cable according to claim 3 wherein the multi-layered second hts tape is spirally wound around the outside of the insulation layer at a preset winding angle.
5. A current limiting type hts cable according to claim 3 wherein the helix angle of each layer of the second hts tape is equal.
6. A current limiting type hts cable according to claim 1, characterized in that the inner surface of the insulating layer is provided with a first semiconducting layer.
7. A current limiting type hts cable according to claim 1, characterized in that the outer surface of the insulating layer is provided with a second semiconducting layer.
8. A current limiting type hts cable according to claim 1 wherein the former is made of copper stranded wire.
9. A current limiting type hts cable according to claim 1, characterized in that the protective layer comprises a thermal insulation layer and a protective sheath;
the protective sleeve is located outside the heat insulating layer.
10. A current limiting type hts cable according to claim 9, characterized in that the thermal insulation layer is a double-layer metal bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911269386.5A CN110911046A (en) | 2019-12-11 | 2019-12-11 | Current-limiting type high-temperature superconducting cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911269386.5A CN110911046A (en) | 2019-12-11 | 2019-12-11 | Current-limiting type high-temperature superconducting cable |
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| CN201911269386.5A Pending CN110911046A (en) | 2019-12-11 | 2019-12-11 | Current-limiting type high-temperature superconducting cable |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111986868A (en) * | 2020-08-17 | 2020-11-24 | 中国科学院合肥物质科学研究院 | Wound magnet based on high-temperature superconducting cable and winding method |
| CN113948251A (en) * | 2021-10-19 | 2022-01-18 | 广东电网有限责任公司 | Insulation structure of superconducting cable |
| CN114628076A (en) * | 2022-03-24 | 2022-06-14 | 中国电力科学研究院有限公司 | Bi-section type three-phase coaxial superconducting cable and design method thereof |
-
2019
- 2019-12-11 CN CN201911269386.5A patent/CN110911046A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111986868A (en) * | 2020-08-17 | 2020-11-24 | 中国科学院合肥物质科学研究院 | Wound magnet based on high-temperature superconducting cable and winding method |
| CN111986868B (en) * | 2020-08-17 | 2022-02-11 | 中国科学院合肥物质科学研究院 | Wound magnet based on high-temperature superconducting cable and winding method |
| CN113948251A (en) * | 2021-10-19 | 2022-01-18 | 广东电网有限责任公司 | Insulation structure of superconducting cable |
| CN113948251B (en) * | 2021-10-19 | 2023-10-10 | 广东电网有限责任公司 | Insulating structure of superconducting cable |
| CN114628076A (en) * | 2022-03-24 | 2022-06-14 | 中国电力科学研究院有限公司 | Bi-section type three-phase coaxial superconducting cable and design method thereof |
| CN114628076B (en) * | 2022-03-24 | 2023-10-03 | 中国电力科学研究院有限公司 | Two-section three-phase coaxial superconducting cable and design method thereof |
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