CN111508682B - Composite material framework structure for superconducting current limiter - Google Patents

Composite material framework structure for superconducting current limiter Download PDF

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Publication number
CN111508682B
CN111508682B CN202010127223.XA CN202010127223A CN111508682B CN 111508682 B CN111508682 B CN 111508682B CN 202010127223 A CN202010127223 A CN 202010127223A CN 111508682 B CN111508682 B CN 111508682B
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China
Prior art keywords
flange
holes
transition disc
ring
lower flange
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Expired - Fee Related
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CN202010127223.XA
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Chinese (zh)
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CN111508682A (en
Inventor
胡磊
戴少涛
马韬
王邦柱
张腾
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Beijing Jiaotong University
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Beijing Jiaotong University
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Priority to CN202010127223.XA priority Critical patent/CN111508682B/en
Publication of CN111508682A publication Critical patent/CN111508682A/en
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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
    • 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
    • H01F6/065—Feed-through bushings, terminals and joints
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H02H9/023—Current limitation using superconducting elements
    • 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

Abstract

The embodiment of the invention provides a composite material skeleton structure for a superconducting current limiter, which comprises the following components: the device comprises an upper flange, a lower flange, a transition disc, a current lead and a fixing ring; the upper flange, the transition disc and the lower flange are sequentially arranged to form a main body structure of the framework of the current limiter; the transition coiling is provided with a superconducting tape, two sections of the superconducting tape are respectively connected with a current lead, and the current lead is positioned between the upper flange and the lower flange and is fixedly connected with the lower flange; the fixed ring is installed between the upper flange and the lower flange and used for supporting the whole coil. The invention has simple structure, easy production and manufacture, convenient use and good cooling effect. In addition, the invention adopts the current lead structure to ensure the safety and reliability of the welding joint.

Description

Composite material framework structure for superconducting current limiter
Technical Field
The invention relates to the technical field of superconducting electricians, in particular to a composite material framework structure for a superconducting current limiter.
Background
The superconducting current limiter is used as an effective short-circuit current limiting device, and can quickly limit the short-circuit current to an acceptable level when a short-circuit fault occurs, so that the serious damage of the large short-circuit current in a power grid to the safe and stable operation of the power grid and electrical equipment is avoided, the stability of the power grid can be greatly improved, and the reliability and the safety of power supply are improved.
The core part of the superconducting current limiter is a superconducting coil, the manufacturing process of the superconducting current limiter needs to take the whole cooling effect and the safety in operation into consideration, and the part welded by the joint needs to be safe and firm enough.
Disclosure of Invention
Embodiments of the present invention provide a composite backbone structure for a superconducting current limiter to overcome the disadvantages of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme.
A composite backbone structure for a superconducting current limiter, comprising: the device comprises an upper flange, a lower flange, a transition disc, a current lead and a fixing ring;
the upper flange, the transition disc and the lower flange are sequentially arranged to form a main body structure of the framework of the current limiter;
the transition coil is provided with a superconducting tape, two ends of the superconducting tape are respectively connected with a current lead, and the current lead is positioned between the upper flange and the lower flange and is fixedly connected with the lower flange;
the fixed ring is arranged between the upper flange and the lower flange and used for supporting the whole coil.
Preferably, the current lead is divided into a superconducting tape welding straight line section and an external lead connecting straight line section, and an included angle between the superconducting tape welding straight line section and the external lead connecting straight line section is not less than 120 degrees;
the side surface of the external lead connecting straight line section is fixedly connected with the lower flange;
and the top surface of the external lead connecting straight line section is connected with an external current lead.
Preferably, the transition disc is provided with a reversing structure in the middle, and the superconducting tape is wound on the transition disc after reversing is completed through the reversing structure.
Preferably, the transition disc comprises: the reversing mechanism comprises a first transition disc and a second transition disc, wherein the first transition disc and the second transition disc are oppositely arranged and integrally form a circular structure, the reversing structure is positioned between the first transition disc and the second transition disc, and the reversing structure is an S-shaped gap.
Preferably, the upper flange includes: the flange comprises a flange ring, spokes and a flange plate positioned in the middle of the flange ring;
the flange ring and the flange plate are circular, the flange ring and the flange plate are connected through a plurality of spokes, the spokes are distributed along the radial direction of the flange plate, and gaps between adjacent spokes are used as a channel for flowing liquid nitrogen;
the flange plate is provided with two arc-shaped through holes which are symmetrically distributed, and the arc-shaped through holes correspond to the reversing structure of the transition disc in position.
Preferably, the lower flange comprises: the flange comprises a flange ring, spokes and a flange plate positioned in the middle of the flange ring;
the flange ring and the flange plate are circular, the flange ring and the flange plate are connected through a plurality of spokes, the spokes are distributed along the radial direction of the flange plate, and gaps between adjacent spokes are used as a channel for flowing liquid nitrogen;
the flange plate is provided with two arc-shaped through holes which are symmetrically distributed, and the arc-shaped through holes correspond to the reversing structure of the transition disc in position;
the lower flange is provided with two lead connecting holes, and the current lead is fixedly connected with the lower flange through the lead connecting holes.
Preferably, the flange plates of the upper flange and the lower flange and the corresponding positions of the transition disc are provided with a plurality of through holes, and the through holes are used for fixedly connecting the upper flange, the transition disc and the lower flange through connecting bolts.
Preferably, flange connecting holes are distributed on the flange rings of the upper flange and the lower flange along the circumferential direction.
Preferably, the fixing ring is a hollow cylinder, the size of the central through hole of the fixing ring is the same as that of the flange connecting hole, and the height of the fixing ring is consistent with the thickness of the current lead.
Preferably, the upper flange, the lower flange, the transition disc and the fixing ring are made of composite materials, and the fixing current lead is made of red copper.
It can be seen from the technical solutions provided by the embodiments of the present invention that, the embodiments of the present invention provide a composite material skeleton structure for a superconducting current limiter, which is composed of an upper flange, a lower flange, a transition disc, a current lead and a fixing ring, the above components are all made of composite materials except for the current lead made of red copper, and the upper flange, the transition disc and the lower flange form a main structure of the current limiter skeleton. The transition disc adopts the S-shaped gap as a reversing structure, and only one superconducting strip can realize current reversing to realize mutual offset of the whole inductances of the wound coils. In addition, the invention adopts the current lead structure to ensure the safety and reliability of the welding joint.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a composite material skeleton for a superconducting current limiter according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an upper flange according to an embodiment of the present invention;
FIG. 3 is a schematic view of a lower flange structure according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a transition tray structure provided in accordance with an embodiment of the present invention;
FIG. 5a is a top view of a current lead provided by an embodiment of the present invention;
FIG. 5b is a front view of a current lead provided by an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a retaining ring provided in accordance with an embodiment of the present invention;
FIG. 7 is a schematic view of the winding of a superconducting tape according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
For the convenience of understanding the embodiments of the present invention, the following description will be further explained by taking several specific embodiments as examples in conjunction with the drawings, and the embodiments are not to be construed as limiting the embodiments of the present invention.
An embodiment of the present invention provides a composite material skeleton structure for a superconducting current limiter, as shown in fig. 1, including: upper flange 1, lower flange 2, transition plate 3, current lead 4 and retaining ring 5. The upper flange 1, the lower flange 2, the transition disc 3 and the fixing ring 5 are made of composite materials, and the current lead is made of red copper. The upper flange 1, the transition disc 3 and the lower flange 2 are sequentially arranged to form a main body structure of the current limiter framework, and the current lead 4 is located between the upper flange 1 and the lower flange 2 and fixedly connected with the lower flange 2.
The middle of the transition disc 3 is provided with a reversing structure, the superconducting tapes are firstly reversed through the reversing structure in the middle of the transition disc 3, then the superconducting tapes are wound on the transition disc 3 layer by layer, the two ends of the superconducting tapes are respectively welded with the current lead 4 to complete the winding work of the whole superconducting current limiter coil, and the fixing ring 5 is arranged between the upper flange 1 and the lower flange 2 to play a role in supporting the whole coil.
As shown in fig. 2, the upper flange 1 includes: the flange ring 11 and the ring flange 13 are circular, the flange ring 11 is connected with the ring flange 13 through a plurality of spokes 12, the spokes 12 are distributed along the radial direction of the ring flange 13, and gaps between adjacent spokes are used as liquid nitrogen flowing channels. A plurality of flange connecting holes 14 are uniformly distributed in the circumferential direction of the flange ring 11, and bolts are used for connecting the flange connecting holes 14 with the fixed ring 5 and the lower flange 2 through the through holes 14. The flange plate 13 is provided with a plurality of through holes 15 for fixedly connecting the upper flange 1, the transition plate 3 and the lower flange 2 through connecting bolts. Two arc through holes 16 which are symmetrically distributed on the flange plate 13 correspond to the reversing structure of the transition plate 2 and the arc through holes on the lower flange 2. Four through holes 17 with large calibers are evenly distributed on the circumference of the flange plate 13.
As shown in fig. 3, the lower flange 2 includes: the flange ring 21 and the flange plate 23 are circular, the flange ring 21 and the flange plate 23 are connected through a plurality of spokes 22, the spokes 22 are distributed along the radial direction of the flange plate 23, and gaps between adjacent spokes are used as liquid nitrogen flowing channels. A plurality of flange connection holes 24 are uniformly distributed in the circumferential direction of the flange ring 21, and bolts are used to connect the fixed ring 5 and the upper flange 1 through the through holes 24. The flange plate 23 is provided with two arc through holes 26 which are symmetrically distributed and correspond to the reversing structure of the transition plate 3 and the arc through holes 16 on the upper flange. Four through holes 27 with large calibers are evenly distributed on the circumference of the flange plate 23. The lower flange 2 is provided with two lead connecting holes 28, and the current lead 4 is fixedly connected with the lower flange 2 through the lead connecting holes 28.
As shown in fig. 4, the transition tray 3 includes: the first transition disc 31 and the second transition disc 32 are oppositely arranged and integrally in a circular structure, the reversing structure is located between the first transition disc 31 and the second transition disc 32, and the reversing structure is an S-shaped gap 33. Four through holes 34 with large caliber are evenly distributed on the circumference of the transition disc 3, so that bolts can fix the upper and lower flanges 1, 2 and the transition disc 3 together through the through holes 17, 27 and 34 and the fixing ring 5.
As shown in fig. 5, the current lead 4 is divided into a superconducting tape welding straight line segment 41 and an external lead connecting straight line segment 42, and an angle is formed between the two straight line segments, and the angle is not less than 120 degrees. The side surface of the external lead connecting straight line section 42 is provided with two inclined threaded through holes 43, and the current lead 4 is connected to the lower flange 2 by using bolts through the through holes 43 and the through holes 28 of the lower flange 2. The top of the external lead connecting straight line section 42 is provided with two threaded through holes 44 which are connected with external current leads through the through holes 44.
As shown in fig. 6, the fixing ring 5 is a hollow cylinder, a central through hole 51 of which size is the same as that of the flange coupling holes 14 and 24, and a bolt passes through the central through hole 51 to fixedly couple the upper and lower flanges. Wherein the height h of the fixing ring 5 corresponds to the thickness d of the current lead 4.
As shown in fig. 7, one end of the superconducting tape enters from the opening on one side of the S-shaped slit on the circumference of the transition disk, and extends from the opening on the other side of the S-shaped slit, one end of the extended superconducting tape is moved closer to the other end of the transition disk along the circumference of the transition disk, and the overlapped superconducting tapes are wound layer by layer along the circumference of the transition disk.
Those of ordinary skill in the art will understand that: the figures are merely schematic representations of one embodiment, and the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for apparatus or system embodiments, since they are substantially similar to method embodiments, they are described in relative terms, as long as they are described in partial descriptions of method embodiments. The above-described embodiments of the apparatus and system are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
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 are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. A composite backbone structure for a superconducting current limiter, comprising: the device comprises an upper flange, a lower flange, a transition disc, a current lead and a fixing ring;
the upper flange, the transition disc and the lower flange are sequentially arranged to form a main body structure of the framework of the current limiter;
the transition coil is provided with a superconducting tape, two ends of the superconducting tape are respectively connected with a current lead, and the current lead is positioned between the upper flange and the lower flange and is fixedly connected with the lower flange;
the fixing ring is arranged between the upper flange and the lower flange and used for supporting the whole coil;
the current lead is divided into a superconducting tape welding straight line section and an external lead connecting straight line section, and the included angle between the superconducting tape welding straight line section and the external lead connecting straight line section is not less than 120 degrees;
the side surface of the external lead connecting straight line section is fixedly connected with the lower flange;
the top surface of the external lead connecting straight line section is connected with an external current lead;
the side surface of the external lead connecting straight line section is provided with two obliquely arranged threaded through holes, and the current lead is connected to the lower flange by using the threaded through holes and the through hole of the lower flange; the top of the external lead connecting straight line section is provided with two threaded through holes, and the top through hole of the external lead connecting straight line section is connected with an external current lead.
2. The former of claim 1, wherein the transition disc has a reversing structure in the middle thereof, and the superconducting tape is wound around the transition disc after reversing by the reversing structure.
3. The skeletal structure of claim 2, wherein the transition dial comprises: the reversing mechanism comprises a first transition disc and a second transition disc, wherein the first transition disc and the second transition disc are oppositely arranged and integrally form a circular structure, the reversing structure is positioned between the first transition disc and the second transition disc, and the reversing structure is an S-shaped gap.
4. The skeletal structure of claim 3, wherein the upper flange comprises: the flange comprises a flange ring, spokes and a flange plate positioned in the middle of the flange ring;
the flange ring and the flange plate are circular, the flange ring and the flange plate are connected through a plurality of spokes, the spokes are distributed along the radial direction of the flange plate, and gaps between adjacent spokes are used as a channel for flowing liquid nitrogen;
the flange plate is provided with two arc-shaped through holes which are symmetrically distributed, and the arc-shaped through holes correspond to the reversing structure of the transition disc in position.
5. The skeletal structure of claim 4, wherein the lower flange comprises: the flange comprises a flange ring, spokes and a flange plate positioned in the middle of the flange ring;
the flange ring and the flange plate are circular, the flange ring and the flange plate are connected through a plurality of spokes, the spokes are distributed along the radial direction of the flange plate, and gaps between adjacent spokes are used as a channel for flowing liquid nitrogen;
the flange plate is provided with two arc-shaped through holes which are symmetrically distributed, and the arc-shaped through holes correspond to the reversing structure of the transition disc in position;
the lower flange is provided with two lead connecting holes, and the current lead is fixedly connected with the lower flange through the lead connecting holes.
6. The framework structure of claim 5, wherein the flanges of the upper and lower flanges and the corresponding positions of the transition disc are provided with a plurality of through holes, and the through holes are used for fixedly connecting the upper flange, the transition disc and the lower flange through connecting bolts.
7. The framework structure of claim 6, wherein the flange rings of the upper and lower flanges are circumferentially distributed with flange connection holes.
8. The frame structure according to claim 7, wherein the fixing ring is a hollow cylinder, a central through hole of the fixing ring has the same size as the flange connecting hole, and the height of the fixing ring is equal to the thickness of the current lead.
9. The frame structure of claim 1, wherein the upper flange, the lower flange, the transition plate and the retaining ring are machined from a composite material, and the retaining current lead is made of red copper.
CN202010127223.XA 2020-02-28 2020-02-28 Composite material framework structure for superconducting current limiter Expired - Fee Related CN111508682B (en)

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CN113054634B (en) * 2021-04-20 2022-07-29 北京交通大学 Double-cake type inductive superconducting current limiting unit for inductive superconducting direct current limiter
CN114464389B (en) * 2021-12-01 2023-12-22 国网江苏省电力有限公司经济技术研究院 Superconducting current limiting device

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ITTO20070940A1 (en) * 2007-12-27 2009-06-28 Asg Superconductors S P A COIL WITH SUPERCONDUCTIVE COOLING COOLED WITHOUT CRYOGENIC FLUIDS
CN102394269B (en) * 2011-06-24 2013-06-05 中国科学院电工研究所 Framework for superconducting switch and non-inductive winding method
CN102610352B (en) * 2012-03-06 2013-09-18 中国科学院电工研究所 Non-inductive coil for high-temperature superconducting resistance-type current restrictor
CN104218775B (en) * 2014-08-31 2016-11-16 中国科学院电工研究所 A kind of current feed for superconducting motor
CN106298153B (en) * 2016-08-22 2018-07-17 中国科学院电工研究所 A kind of cake-shaped high-temperature superconductive noninductive coil

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Granted publication date: 20210730