WO2015136813A1 - 超電導ケーブルの中間接続部材及び超電導ケーブルの中間接続構造 - Google Patents

超電導ケーブルの中間接続部材及び超電導ケーブルの中間接続構造 Download PDF

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Publication number
WO2015136813A1
WO2015136813A1 PCT/JP2014/083548 JP2014083548W WO2015136813A1 WO 2015136813 A1 WO2015136813 A1 WO 2015136813A1 JP 2014083548 W JP2014083548 W JP 2014083548W WO 2015136813 A1 WO2015136813 A1 WO 2015136813A1
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WO
WIPO (PCT)
Prior art keywords
superconducting
wire
intermediate connection
cable
arrangement
Prior art date
Application number
PCT/JP2014/083548
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English (en)
French (fr)
Japanese (ja)
Inventor
祐一 芦辺
Original Assignee
住友電気工業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 住友電気工業株式会社 filed Critical 住友電気工業株式会社
Priority to DE112014006460.2T priority Critical patent/DE112014006460T5/de
Priority to KR1020167025239A priority patent/KR101823814B1/ko
Publication of WO2015136813A1 publication Critical patent/WO2015136813A1/ja

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/68—Connections to or between superconductive connectors
    • 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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/34—Cable fittings for cryogenic cables
    • 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

Definitions

  • the present invention relates to an intermediate connection member and an intermediate connection structure for connecting superconducting cables provided with a cable core having a former and a superconducting conductor layer formed of a superconducting wire around the former.
  • the superconducting cable intermediate connection member and the superconducting conductor that can electrically connect the superconducting conductor layers in the respective cable cores of the two superconducting cables to be connected to each other with a low resistance and can fix the connecting portion of both superconducting cables to the connection box.
  • the present invention relates to an intermediate connection structure of cables.
  • Superconducting cables are expected to be put to practical use as energy-saving technologies because they can transmit large-capacity power with low loss compared to existing normal conducting cables (eg, OF cables and CV cables). Recently, a demonstration test has been underway in which a superconducting cable is laid to construct a transmission line and the power is actually transmitted.
  • existing normal conducting cables eg, OF cables and CV cables.
  • a superconducting cable contains a cable core having a superconducting conductor layer formed of a superconducting wire on the outer periphery of a former in a heat insulating tube, and a refrigerant (eg, liquid nitrogen) is circulated in the heat insulating tube, thereby superconducting conductor layer (superconducting layer).
  • a refrigerant eg, liquid nitrogen
  • a structure having a structure in which the wire) is cooled to a superconducting state is typical.
  • connection sleeve is a rod-shaped member made of a normal conductive material such as copper or aluminum, and includes connection portions into which superconducting conductors are inserted at both ends. Then, the superconducting conductors are connected to each other by inserting and crimping the superconducting conductors of the respective cable cores into the respective connecting portions of the connecting sleeve.
  • a solid insulating member made of an insulating resin such as an epoxy resin is disposed on the outer periphery of the connection sleeve, a protrusion is provided on the solid insulating member, and the protrusion is fixed to the connection box via a metal flange by a fixing bracket.
  • the superconducting conductor layers are electrically connected to each other via a connecting sleeve made of a normal conducting material, and the connecting sleeve itself has a higher resistance than the superconducting conductor layer. Therefore, the connection resistance between the superconducting conductor layers is high, and the loss at the connection portion is large.
  • the superconducting conductor layer can be electrically connected with low resistance between the superconducting conductor layers in the cable cores of both superconducting cables to be connected, and the superconducting conductor can be fixed to the connection box.
  • An intermediate connection member of a superconducting cable is an intermediate connection of superconducting cables that includes a former and a cable core having a superconducting conductor layer formed of a superconducting wire around the former.
  • a superconducting wire for connection that electrically connects the superconducting conductor layers, a wire arrangement portion that is provided outside the central portion and in which an arrangement hole for arranging the superconducting wire for connection is formed, and the outside of the wire arrangement portion
  • An intermediate insulating member of a superconducting cable having an outer insulating portion formed of an insulating resin, and having an attachment portion fixed to the intermediate connecting box on the outer insulating portion. That.
  • An intermediate connection structure for a superconducting cable is an intermediate connection between superconducting cables that includes a former and a cable core having a superconducting conductor layer formed of a superconducting wire around the former.
  • An intermediate connection member for connecting the formers exposed from the ends of the cable cores and the superconducting conductor layers between the ends of the cable cores of the two superconducting cables that are connected to each other,
  • An end of each cable core and an intermediate connection box for storing the intermediate connection member, wherein the intermediate connection member is the intermediate connection member according to one aspect of the present invention, and the intermediate connection member is the intermediate connection
  • This is an intermediate connection structure of a superconducting cable fixed to a box.
  • the superconducting cable intermediate connection member and the superconducting cable intermediate connection structure can electrically connect the superconducting conductor layers in each cable core of both superconducting cables to each other with low resistance and connect the connecting portions of both superconducting cables. Can be fixed to the box.
  • FIG. 3 is a schematic end view for explaining an intermediate connection member shown in FIG. 2. It is explanatory drawing of the formation method of the arrangement
  • An intermediate connection member of a superconducting cable includes: (1) a superconducting cable that connects a superconducting cable including a cable core having a former and a superconducting conductor layer formed of a superconducting wire around the former.
  • An intermediate connection member having a fixing portion for fixing an end portion of the former at both ends, connected to a central portion connecting the formers and an end portion of the superconducting wire forming the superconducting conductor layer.
  • a superconducting wire for connection that electrically connects the superconducting conductor layers; a wire arrangement portion that is provided outside the central portion and in which an arrangement hole for arranging the superconducting wire for connection is formed; and the wire arrangement Intermediate connection of a superconducting cable having an outer insulating portion formed of an insulating resin and having an attachment portion fixed to the intermediate connection box on the outer insulating portion A wood.
  • the intermediate connection member of the superconducting cable since the superconducting conductor layers are electrically connected to each other by the connecting superconducting wire arranged in the arrangement hole of the wire arrangement portion, the connection resistance between the superconducting conductor layers can be greatly reduced. . Therefore, the superconducting conductor layers in the respective cable cores of the two superconducting cables to be connected can be electrically connected with low resistance, and the loss at the connecting portion can be reduced. Further, the intermediate connection member can be fixed to the intermediate connection box by the mounting portion provided in the outer insulating portion, and both superconducting cables (cable cores) can be fixed to the intermediate connection box.
  • the position shift of the superconducting cable (cable core) due to thermal contraction can be suppressed in the connection portion. Furthermore, by providing the center part which has a fixing
  • An example of the insulating resin that forms the outer insulating portion is an epoxy resin.
  • the cable core further includes an outer superconducting conductor layer that is concentrically disposed outside the superconducting conductor layer with an insulating layer interposed therebetween, and is formed of a superconducting wire, and forms the outer superconducting conductor layer.
  • An outer connection superconducting wire that is connected to an end portion of the superconducting wire and electrically connects the outer superconducting conductor layers, and an intermediate formed of an insulating resin between the wire arrangement portion and the outer insulating portion It is preferable to include an insulating portion and an outer wire arrangement portion in which an arrangement hole for arranging the outer connection superconducting wire is formed outside the intermediate insulating portion.
  • an outer superconducting conductor layer may be arranged concentrically through an insulating layer outside the superconducting conductor layer.
  • the outer superconducting conductor layer is used as a conductor through which a return current flows.
  • the outer superconducting conductor layer is used as a superconducting conductor layer. May be used for conductors that carry currents of opposite polarity.
  • the outer superconducting conductor layer may be used as an electromagnetic shield layer.
  • the connection resistance between the outer superconducting conductor layers can be greatly reduced, and the outer superconducting conductor layers are electrically connected with low resistance.
  • the intermediate insulating portion can be formed of the same insulating resin (for example, epoxy resin) as the outer insulating portion.
  • the total number of superconducting wires for connection is preferably larger than the total number of superconducting wires forming the superconducting conductor layer.
  • the transmission current is determined by the size of the conductor cross-sectional area, that is, the number of superconducting wires.
  • the total number of superconducting wires for connection is larger than the total number of superconducting wires forming the superconducting conductor layer, the connection resistance between the superconducting conductor layers can be more easily reduced, and the transmission capacity of the connection portion can be reduced. Enough can be secured.
  • the total number of superconducting wires for outer connection may be larger than the total number of superconducting wires forming the outer superconducting conductor layer.
  • a plurality of the superconducting wires for connection are arranged in one arrangement hole, and these superconducting wires for connection are integrated.
  • a plurality of connecting superconducting wires are integrated, a plurality of connecting superconducting wires can be simultaneously arranged in one arrangement hole, and the connecting superconducting wires are easily arranged in the wire arrangement portion.
  • the superconducting wires for outside connection may be arranged in one arrangement hole in a state where a plurality of the superconducting wires are integrated.
  • the insulating resin forming the outer insulating portion is a fiber reinforced resin.
  • the intermediate connection member is provided with the mounting portion in the outer insulating portion and fixed to the intermediate connection box, the mechanical strength that can withstand the superconducting cable (cable core) is required even if it is thermally contracted.
  • the mechanical strength of an outer side insulation part can be raised more because the outer side insulation part is formed with fiber reinforced resin (FRP).
  • the intermediate insulating portion may be formed of a fiber reinforced resin.
  • An intermediate connection structure of superconducting cables is (6) a superconducting cable that connects a superconducting cable having a cable core having a former and a superconducting conductor layer formed of a superconducting wire around the former.
  • the intermediate connection member is a superconducting cable intermediate connection structure in which the intermediate connection member is fixed to the intermediate connection box.
  • the superconducting conductor layers exposed from the ends of the cable cores of both superconducting cables are electrically connected by the connecting superconducting wire of the intermediate connecting member. Connection resistance between layers can be greatly reduced. Therefore, the superconducting conductor layers in the respective cable cores of the two superconducting cables to be connected can be electrically connected with low resistance, and the loss at the connecting portion can be reduced. Further, the formers are mechanically connected (coupled) by the central portion of the intermediate connecting member, so that both superconducting cables (cable cores) can be firmly coupled.
  • the intermediate connection member is fixed to the intermediate connection box by the mounting portion provided on the outer insulating portion of the intermediate connection member, and both superconducting cables (cable cores) are fixed to the intermediate connection box. In the box, the displacement of the superconducting cable (cable core) due to heat shrinkage can be suppressed.
  • the superconducting cable 100 is a single-core cable that includes a cable core 110 and a heat insulating tube 120 that stores the cable core 110, and one cable 110 is stored in the heat insulating tube 120.
  • a former 111 In the cable core 110, a former 111, a superconducting conductor layer 112, an insulating layer 113, an outer superconducting conductor layer 114, an outer insulating layer 115, a ground layer 116, and a protective layer 117 are arranged concentrically from the center.
  • the former 111 is made of a metal or alloy such as copper, aluminum, and stainless steel.
  • a stranded wire obtained by twisting a plurality of metal wires can be used.
  • the former 111 is formed of a stranded wire obtained by twisting a plurality of copper wires.
  • an insulation coating such as enamel on the former (copper wire).
  • a plurality of metal wires with insulation coating typically It is preferable to use a twisted wire in which a copper wire is twisted for the former. Even in the case of a DC superconducting cable, a copper wire having an insulating coating may be used.
  • the superconducting conductor layer 112 is formed by spirally winding a plurality of superconducting wires around the outer periphery of the former 111, and can be formed into a multilayer structure in which superconducting wires are laminated by winding the superconducting wires in multiple layers.
  • a superconducting wire such as a Bi-based silver sheathed wire or a RE123-based thin film wire can be used.
  • the superconducting conductor layer 112 has a four-layer structure, and a positive (+) current flows through the superconducting conductor layer 112.
  • the insulating layer 113 is interposed between the superconducting conductor layer 112 and the outer superconducting conductor layer 114 disposed outside thereof, and ensures electrical insulation between the superconducting conductor layer 112 and the outer superconducting conductor layer 114.
  • the insulating layer 113 is formed by spirally winding insulating paper around the outer periphery of the superconducting conductor layer 112.
  • kraft paper or semi-synthetic paper such as PPLP (registered trademark) may be used.
  • the outer superconducting conductor layer 114 is formed by spirally winding a plurality of superconducting wires on the outer side of the superconducting conductor layer 112, specifically on the outer periphery of the insulating layer 113. Similarly to the superconducting conductor layer 112, the outer superconducting conductor layer 114 can also have a multilayer structure in which superconducting wires are laminated by winding the superconducting wire in multiple layers. In this example, the outer superconducting conductor layer 114 has a two-layer structure, and a negative ( ⁇ ) current flows through the outer superconducting conductor layer 114.
  • the outer insulating layer 115 is interposed between the outer superconducting conductor layer 114 and the grounding layer 116 disposed outside the outer superconducting conductor layer 114, and ensures electrical insulation between the outer superconducting conductor layer 114 and the grounding layer 116.
  • the outer insulating layer 115 is formed by spirally winding insulating paper around the outer periphery of the outer superconducting conductor layer 114.
  • the ground layer 116 functions as a neutral wire and is grounded.
  • the ground layer 116 is formed by winding a ground conductor around the outer periphery of the outer insulating layer 115.
  • the ground layer 116 may be formed, for example, by spirally winding a wire or tape made of a normal conductive material such as copper or aluminum, or by winding a braided wire made of a normal conductive material. it can.
  • the ground layer 116 is formed of copper tape.
  • the ground layer 116 also functions as an electric field shielding layer.
  • the protective layer 117 is disposed on the outermost periphery of the cable core 110, and mechanically and electrically protects the cable core 110 (a member (such as the ground layer 116) positioned inside the protective layer 117).
  • the protective layer 117 is formed by spirally winding an insulating paper around the outer periphery of the ground layer 116.
  • the heat insulation pipe 120 has a double pipe structure having an inner pipe 121 and an outer pipe 122, and a space between the inner pipe 121 and the outer pipe 122 is evacuated, and super insulation (trade name) or the like is placed in the space.
  • the heat insulating material 123 is arranged.
  • the inner pipe 121 and the outer pipe 122 are stainless steel corrugated pipes, and an anticorrosion layer 124 is provided on the outer periphery of the heat insulating pipe 120 (outer pipe 122), such as vinyl or polyethylene.
  • FIG. 3 is a view of the intermediate connecting member 1 as viewed from the end surface, and is not a cross-sectional view, but is partially hatched to make the drawing easy to see (the same applies to FIGS. 4 and 5).
  • the intermediate connecting member 1 connects the formers 111, the superconducting conductor layers 112, and the outer superconducting conductor layers 114 exposed from the ends of the cable cores 110 of the two superconducting cables 100 to be connected. It is a member to do. As shown in FIGS.
  • the intermediate connection member 1 includes a center portion 10, a wire rod arrangement portion 20, an intermediate insulation portion 30, an outer wire rod arrangement portion 40, and an outer insulation portion 50, and a wire rod arrangement is provided.
  • the superconducting wire 20s for connection and the superconducting wire 40s for outer connection are arranged in the part 20 and the outer wire arrangement part 40, respectively.
  • the central portion 10 is a round bar-like member that connects the formers 111 (see FIG. 6), and has a fixing portion 11 that fixes the end portions of the former 111 at both ends.
  • the central portion 10 is preferably formed of a metal having high mechanical strength because the formers 111 are mechanically connected (linked) to each other.
  • metals or alloys such as copper, aluminum, stainless steel, are mentioned, for example.
  • the center portion 10 is more preferably formed of stainless steel having excellent mechanical strength.
  • the center part 10 is formed of stainless steel.
  • the fitting portion 11o is formed in the fixing portion 11.
  • the center portion 10 and the former 111 are connected to each other by, for example, inserting the end portion of the former 111 into the fitting hole 11o and compressing from the outside. Since the portion of the fixing portion 11 where the fitting hole 11o is formed is thick, it is easy to compress and join.
  • the wire arrangement part 20 is a cylindrical part provided on the outer periphery of the central part 10 and having an arrangement hole 20h in which the connecting superconducting wire 20s is arranged.
  • the arrangement hole 20h penetrates from one end to the other end of the wire arrangement portion 20 in the longitudinal direction.
  • a plurality of superconducting wires for connection 20s are arranged in the arrangement hole 20h.
  • the superconducting wire for connection 20s is inserted into the arrangement hole 20h of the wire arrangement part 20 from one side to the other to electrically connect the superconducting conductor layers 112 to each other (see FIG. 6).
  • the connecting superconducting wire 20s is sufficiently longer than the length of the arrangement hole 20h, and both ends of the connecting superconducting wire 20s protrude from the arrangement hole 20h. It is preferable that the wire arrangement
  • positioning part 20 are integrally formed, and the wire arrangement
  • the connecting superconducting wire 20s uses the same superconducting wire as the superconducting wire forming the superconducting conductor layer 112, and the total number of connecting superconducting wires 20s is the total number of superconducting wires forming the superconducting conductor layer 112. More than. That is, the total conductor cross-sectional area of the connecting superconducting wire 20 s arranged in the wire arrangement part 20 is larger than the conductor cross-sectional area of the superconducting conductor layer 112.
  • the central portion 10 and the wire arrangement portion 20 are integrally formed, but the central portion 10 and the wire arrangement portion 20 may be separate members.
  • positioning part 20 are another members, it is good to couple
  • positioning part 20 can also be formed with metals or alloys, such as copper and aluminum, forming with stainless steel is preferable. By forming the wire arrangement part 20 from stainless steel having a relatively large electric resistance, a part of the current flowing through the connecting superconducting wire 20s is less likely to flow through the wire arrangement part 20, so that the connection resistance can be more easily reduced. Heat generation of the wire arrangement part 20 can also be suppressed. Further, a superconducting wire different from the superconducting wire forming the superconducting conductor layer 112 may be used for the connecting superconducting wire 20s.
  • the wire rod placement portion 20 is divided into two cylindrical members in the radial direction at the place where the placement hole 20h is formed, and these are integrated to produce the wire rod placement portion 20.
  • the wire arrangement portion 20 includes an inner cylinder portion 21 (upper left in FIG. 4) including the center portion 10, and an outer cylinder portion having the same inner diameter as the outer diameter of the inner cylinder portion 21. 22 (upper right of FIG. 4).
  • channel 21g is formed in the outer peripheral surface of the inner cylinder part 21 from one end of a longitudinal direction to the other end, the inner cylinder part 21 is inserted in the outer cylinder part 22, and the inner cylinder part 21 and an outer cylinder part 22 is welded and integrated at the end portion, thereby producing the wire arrangement portion 20 (bottom of FIG. 4).
  • channel 21g formed in the outer peripheral surface of the inner cylinder part 21 becomes the arrangement
  • the arrangement hole 20h can be formed with high accuracy by simple groove processing.
  • the arrangement groove 21g is formed on the outer peripheral surface of the inner cylinder portion 21
  • the arrangement groove may be formed on the inner peripheral surface of the outer cylinder portion 22, and the inner cylinder portion 21 may be formed.
  • Arrangement grooves may be formed on the outer circumferential surface of the outer cylindrical portion 22 and the inner circumferential surface of the outer cylindrical portion 22.
  • the inner cylinder part 21 and the outer cylinder part 22 may be integrated so that the arrangement grooves of the inner cylinder part 21 and the outer cylinder part 22 overlap in the radial direction.
  • connection superconducting wires 20s are arranged in each arrangement hole 20h.
  • the connecting superconducting wire 20 s is inserted in the arrangement hole 20 h in the circumferential direction, and fixed to the end of the wire arrangement portion 20 with solder.
  • the stacked connection superconducting wires 20s are integrated with solder, and the integrated connection superconducting wires 20s are arranged in each manner. It may be inserted side by side in the circumferential direction of the hole 20h.
  • the intermediate insulating portion 30 is a cylindrical member that is provided on the outer periphery of the wire arrangement portion 20 and is formed of an insulating resin.
  • the intermediate insulating portion 30 is interposed between the wire arrangement portion 20 and the outer wire arrangement portion 40 arranged outside thereof, and ensures electrical insulation between the connecting superconducting wire 20s and the outer connecting superconducting wire 40s.
  • the insulating resin forming the intermediate insulating portion 30 include an epoxy resin, and may be a fiber reinforced resin (FRP) obtained by reinforcing the resin with fibers.
  • FRP fiber reinforced resin
  • the intermediate insulating portion 30 is formed of a molded product of FRP in which an epoxy resin is reinforced with glass fiber.
  • the intermediate insulating part 30 is coupled to the outer peripheral surface of the wire arrangement part 20.
  • the wire arrangement part 20 and the intermediate connection part 30 may be mechanically connected with a screw in order to bond them with an adhesive, or to bond the wire arrangement part 20 and the intermediate insulating part 30 more firmly.
  • the outer wire arrangement part 40 is a cylindrical member provided on the outer periphery of the intermediate insulating part 30 and having an arrangement hole 40h in which the outer connection superconducting wire 40s is arranged.
  • the arrangement hole 40h penetrates from one end to the other end of the outer wire arrangement portion 40 in the longitudinal direction.
  • a plurality of outer connection superconducting wires 40s are arranged in the arrangement hole 40h.
  • the superconducting wire 40s for outer connection is inserted into the arrangement hole 40h of the outer wire arrangement part 40 from one side to the other, and electrically connects the outer superconducting conductor layers 114 to each other (see FIG. 6).
  • the outer connection superconducting wire 40s is sufficiently longer than the length of the arrangement hole 40h, and both ends of the outer connection superconducting wire 40s protrude from the arrangement hole 40h.
  • the outer wire arrangement part 40 is preferably formed of a metal having a high thermal conductivity so that the outer connection superconducting wire 40s can be easily cooled.
  • the outer wire arrangement part 40 is formed of stainless steel.
  • the same superconducting wire as the superconducting wire forming the outer superconducting conductor layer 114 is used for the outer connecting superconducting wire 40s, and the total number of the outer connecting superconducting wires 40s forms the outer superconducting conductor layer 114. More than the total number of wires. That is, the total conductor sectional area of the outer connecting superconducting wire 40 s arranged in the outer wire arrangement part 40 is larger than the conductor sectional area of the outer superconducting conductor layer 114.
  • the outer wire arrangement part 40 can be formed of a metal or alloy such as copper or aluminum, but is preferably formed of stainless steel.
  • the wire arrangement part 20 is formed from stainless steel having a relatively large electric resistance, a part of the current flowing through the superconducting wire 40s for outer connection hardly flows into the outer wire arrangement part 40, so that the connection resistance is further reduced. It is easy to suppress the heat generation of the outer wire arrangement part 40.
  • a superconducting wire different from the superconducting wire forming the outer superconducting conductor layer 114 may be used for the outer connection superconducting wire 40s.
  • the outer wire arrangement part 40 is also produced by dividing it into two cylindrical members in the radial direction at the location where the arrangement hole 40h is formed, and integrating them. Specifically, as shown in FIG. 5, the outer wire arrangement portion 40 is divided into an inner cylinder portion 41 (upper left in FIG. 5) and an outer cylinder portion 42 (FIG. 5) having the same inner diameter as the outer diameter of the inner cylinder portion 41. And the disposing groove 41g is formed on the outer peripheral surface of the inner cylinder portion 41 from one end to the other end in the longitudinal direction.
  • the outer wire rod arrangement portion 40 (lower part in FIG. 5) is formed. Make it. Thereby, the arrangement
  • this outer wire rod arrangement portion 40 it is not necessary to form a long through hole with a drill, and therefore the arrangement hole 40h can be formed with high accuracy by simple groove processing.
  • each arrangement hole 40h is formed at intervals in the circumferential direction of the outer wire arrangement portion 40, and a plurality of outer connection superconducting wires 40s are arranged in each arrangement hole 40h.
  • the superconducting wire 40s for outer connection is inserted in the arrangement hole 40h in the circumferential direction and then fixed to the end of the outer wire arrangement part 40 with solder.
  • the stacked outer connection superconducting wires 40s are integrated with solder, and the outer connection superconducting wires 40s are integrated. May be inserted side by side in the circumferential direction of each arrangement hole 40h.
  • the outer wire rod arrangement part 40 is coupled to the outer peripheral surface of the intermediate insulating part 30.
  • the intermediate insulating portion 30 and the outer wire arrangement portion 40 are bonded with an adhesive, and further, the intermediate insulating portion 30 and the outer wire arrangement portion 40 are more firmly bonded to each other. Good.
  • the outer insulating portion 50 is a cylindrical member that is provided on the outer periphery of the outer wire arrangement portion 40 and is formed of an insulating resin.
  • the outer insulating portion 50 is disposed on the outermost periphery of the intermediate connecting member 1 and is electrically connected between a member (eg, the connecting ground wire 52 (see FIG. 2), etc.) positioned on the outer periphery and the outer connecting superconducting wire 40s.
  • a member eg, the connecting ground wire 52 (see FIG. 2), etc.
  • the insulating resin forming the outer insulating portion 50 include an epoxy resin, and may be a fiber reinforced resin (FRP) in which the resin is reinforced with fibers.
  • FRP fiber reinforced resin
  • the outer insulating portion 50 is formed of a molded product of FRP in which an epoxy resin is reinforced with glass fiber.
  • the outer insulating portion 50 is coupled to the outer peripheral surface of the outer wire arrangement portion 40.
  • the outer wire arrangement part 40 and the outer insulating part 50 are bonded with an adhesive, and further, the outer wire arrangement part 40 and the outer insulating part 50 are more firmly bonded to each other. Good.
  • the outer insulating portion 50 is integrally formed with a flange-like mounting portion 51 protruding in the radial direction.
  • the intermediate connection member 1 is fixed to the intermediate connection box 7 by fixing the mounting portion 51 to the support portion 70a (see FIG. 6) of the intermediate connection box 7 with a bolt or the like. Specifically, the intermediate connection member 1 is fixed to the intermediate connection box 7 by sandwiching the attachment portion 51 between the support portion 70a and the presser plate 70b and tightening the support portion 70a and the presser plate 70b with bolts. .
  • the support portion 70a is provided in the intermediate connection box 7 so as to stand up from the inner peripheral surface of the intermediate connection box 7, and is formed of, for example, stainless steel.
  • a plurality of the support portions 70a are provided on the inner peripheral surface of the intermediate connection box 7 with an interval in the circumferential direction.
  • the pressing plate 70b is a ring-shaped member that sandwiches the attachment portion 51 with the support portion 70a, for example, and is formed of stainless steel.
  • the intermediate connection box 7 is a box that covers the connection location of both superconducting cables 100 including the intermediate connection member 1 and is fixed to the ground.
  • connection ground wire 52 is wound around the outer periphery of the outer insulating portion 50, and a ground layer 116 is electrically connected to the connection ground wire 52 (see FIG. 6).
  • the connection ground wire 52 is formed of a braided wire made of a normal conductive material such as copper or aluminum. Both ends of the connection ground line 52 are electrically connected to the ground layers 116 of the cable cores 110 of the two superconducting cables 100 to be connected, and the connection ground line 52 electrically connects the ground layers 116 to each other. Then, an electric field shielding layer is formed.
  • the intermediate connection structure includes an end portion of each cable core 110 of both superconducting cables 100 to be connected, the intermediate connection member 1 described above, and an intermediate connection box 7 that houses the end portion of each cable core 110 and the intermediate connection member 1. Is provided.
  • the intermediate connection structure shown in FIG. 6 is constructed as follows.
  • the cable core 110 is pulled out from each heat insulation pipe 120 of the two superconducting cables 1 to be connected.
  • end processing is performed, and the protective layer 117, the outer insulating layer 115, and the insulating layer 113 are peeled off, and the former 111, the superconducting conductor layer 112, the outer superconducting conductor layer 114, and the ground layer 116 are removed.
  • the ground layer 116 unwinds the ground conductor (copper tape) at the exposed end portion and draws it out in a state where the ground conductor is separated from the end portion.
  • the superconducting conductor layer 112 and the outer superconducting conductor layer 114 are also unwound by unwinding the superconducting wire at the exposed end, and pulled out in a state where the superconducting wire is separated from the end.
  • the intermediate connection member 1 is installed in advance at a position to be a connection location of both superconducting cables 100.
  • the intermediate connection member 1 is fixed to a ring-shaped peripheral ring portion 73 that is a part of the intermediate connection box 7 in advance, and the peripheral connection portion 1 is suspended by, for example, suspending the peripheral connection portion 1.
  • a support portion 70a is integrally formed on the peripheral ring portion 73 so as to protrude from the inner peripheral surface.
  • the attachment part 51 provided in the outer side insulation part 50 of the intermediate connection member 1 is pinched
  • the former 111 By inserting the end portion of the former 111 exposed from each cable core 110 into the fitting hole 11o of the central portion 10 of the intermediate connecting member 1 and compressing the former 111 from the outside of the fixed portion 11, the former 111 is compression bonded. 111 are connected.
  • the end of the superconducting wire forming the superconducting conductor layer 112 exposed from each cable core 110 and the end of the connecting superconducting wire 20s arranged in the wire arranging part 20 of the intermediate connecting member 1 are overlapped.
  • the superconducting conductor layers 112 are electrically connected to each other by soldering.
  • an insulating paper is wound around the exposed superconducting conductor layer 112 (superconducting wire) and the connecting superconducting wire 20s to reinforce the insulating portion. 61 is formed.
  • the superconducting wire ends forming the outer superconducting conductor layers 114 exposed from the cable cores 110 and the outer connecting superconducting members disposed at the outer wire arranging portion 40 of the intermediate connecting member 1 are used.
  • the outer superconducting conductor layers 114 are electrically connected to each other by overlapping and soldering the end portions of the wire 40s.
  • an insulating paper is wound around the exposed outer superconducting conductor layer 114 (superconducting wire) and outer connection superconducting wire 40s to form the reinforcing insulating portion 62.
  • the intermediate connection box 7 is assembled so that the end of each cable core 110 and the intermediate connection member 1 are accommodated.
  • the intermediate connection box 7 includes a cylindrical peripheral wall portion 71 and a pair of end wall portions 72 that close both ends of the peripheral wall portion 71.
  • Each end wall 72 is connected to the end of each heat insulating tube 120 of both superconducting cables 100 and is provided with an introduction hole into which the end of each cable core 110 is introduced.
  • the peripheral wall portion 71 is formed by the annular peripheral ring portion 73 described above and a pair of cylindrical half crack pieces that can be divided in the longitudinal direction.
  • a half crack piece is moved to the connection location (intermediate connection member 1) side of both superconducting cables 100, and both half crack pieces are welded and integrated with the peripheral ring part 73. And after forming both the half crack piece and the surrounding ring part 73 and forming the surrounding wall part 71, each end wall part 72 is joined to the both ends of the surrounding wall part 71 by welding, and the intermediate
  • the intermediate junction box 7 is made into a double structure, and a heat insulating material is disposed between the layers of the double structure, or a vacuum heat insulating layer is formed by evacuating each layer of the double structure, Intrusion can be effectively reduced.
  • the peripheral wall portion 71 (including the peripheral ring portion 73) and the end wall portion 72 of the intermediate connection box 7 can be formed of, for example, stainless steel.
  • the support portion 70a is integrally formed with the peripheral ring portion 73.
  • the support portion 70a may be provided by joining the inner peripheral surface of the peripheral ring portion 73 by welding or the like. .
  • the present invention can be applied to the DC superconducting cable of the single pole transmission system, and can also be applied to the AC superconducting cable. It is.
  • a single-core cable in which one cable core is housed in a heat insulation pipe has been described as an example.
  • the present invention is a multi-core cable in which a plurality of cable cores are housed in a heat insulation pipe. Is also applicable.
  • the present invention can also be applied to a three-core collective superconducting cable in which three cable cores are twisted and stored together in a heat insulating tube.
  • the intermediate connection member of the superconducting cable and the intermediate connection structure of the superconducting cable of the present invention are suitable for the intermediate connection member and the intermediate connection structure for connecting the superconducting cables when connecting a plurality of superconducting cables to construct a power transmission line. Can be used.

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Gas Or Oil Filled Cable Accessories (AREA)
PCT/JP2014/083548 2014-03-13 2014-12-18 超電導ケーブルの中間接続部材及び超電導ケーブルの中間接続構造 WO2015136813A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE112014006460.2T DE112014006460T5 (de) 2014-03-13 2014-12-18 Klemmteil für supraleitendes Kabel und Klemmstruktur für supraleitendes Kabel
KR1020167025239A KR101823814B1 (ko) 2014-03-13 2014-12-18 초전도 케이블의 중간 접속 부재 및 초전도 케이블의 중간 접속 구조

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JP2014-050894 2014-03-13
JP2014050894A JP5807849B2 (ja) 2014-03-13 2014-03-13 超電導ケーブルの中間接続部材及び超電導ケーブルの中間接続構造

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CN107895928A (zh) * 2017-11-21 2018-04-10 安徽伊法拉电气有限公司 一种具有散热功能的冷缩中间接头

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CN110265802B (zh) * 2019-06-19 2020-07-14 东部超导科技（苏州）有限公司 一种基于ybco超导材料的超导电缆端部连接结构
KR20210087227A (ko) 2020-01-02 2021-07-12 한국전력공사 초전도 선재의 접속장치 및 이를 이용한 초전도 선재의 접속방법

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JP2009240100A (ja) * 2008-03-27 2009-10-15 Furukawa Electric Co Ltd:The 超電導ケーブルの接続構造体及び接続方法
JP2010020970A (ja) * 2008-07-09 2010-01-28 Sumitomo Electric Ind Ltd 超電導ケーブルコアの接続構造
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CN107895928A (zh) * 2017-11-21 2018-04-10 安徽伊法拉电气有限公司 一种具有散热功能的冷缩中间接头
CN107895928B (zh) * 2017-11-21 2020-06-05 戴文忠 一种具有散热功能的冷缩中间接头

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JP2015177605A (ja) 2015-10-05
JP5807849B2 (ja) 2015-11-10
KR20160122793A (ko) 2016-10-24
KR101823814B1 (ko) 2018-01-30
DE112014006460T5 (de) 2016-12-15

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