WO2006067915A1 - 超電導機器の電力引き出し構造 - Google Patents
超電導機器の電力引き出し構造 Download PDFInfo
- Publication number
- WO2006067915A1 WO2006067915A1 PCT/JP2005/020292 JP2005020292W WO2006067915A1 WO 2006067915 A1 WO2006067915 A1 WO 2006067915A1 JP 2005020292 W JP2005020292 W JP 2005020292W WO 2006067915 A1 WO2006067915 A1 WO 2006067915A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- temperature side
- superconducting
- side conductor
- tank
- low temperature
- Prior art date
Links
- 239000004020 conductor Substances 0.000 claims abstract description 515
- 238000009413 insulation Methods 0.000 claims abstract description 109
- 239000003507 refrigerant Substances 0.000 claims abstract description 93
- 238000000605 extraction Methods 0.000 claims description 16
- 230000008602 contraction Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 107
- 230000005540 biological transmission Effects 0.000 description 50
- 239000000463 material Substances 0.000 description 26
- 238000010586 diagram Methods 0.000 description 19
- 230000035515 penetration Effects 0.000 description 15
- 230000002093 peripheral effect Effects 0.000 description 12
- 238000007789 sealing Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000011247 coating layer Substances 0.000 description 6
- 239000003822 epoxy resin Substances 0.000 description 6
- 229920000647 polyepoxide Polymers 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 239000004593 Epoxy Substances 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000004071 soot Substances 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 239000012777 electrically insulating material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002887 superconductor Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 244000089486 Phragmites australis subsp australis Species 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 241000722921 Tulipa gesneriana Species 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910000416 bismuth oxide Inorganic materials 0.000 description 1
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
Classifications
-
- 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
- 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
-
- 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
- H02G15/00—Cable fittings
- H02G15/20—Cable fittings for cables filled with or surrounded by gas or oil
- H02G15/24—Cable junctions
-
- 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 a power drawing structure that is arranged between a low temperature side and a normal temperature side in a superconducting device and delivers power, and a superconducting cable line having this power drawing structure.
- the present invention relates to a power drawing structure for superconducting equipment that can easily change the drawn power.
- Various superconducting devices have been studied in which a superconducting portion made of a superconducting material can be cooled with a refrigerant to be in a superconducting state to reduce or substantially eliminate electric resistance.
- Examples of such superconducting equipment include a superconducting cable having a superconducting conductor and a superconducting shield layer, a superconducting current limiter having a superconducting coil, a superconducting transformer, and a superconducting power storage device.
- a lead structure for inputting and outputting electric power between the low temperature side and the normal temperature side is usually formed at the end of the superconducting part such as a superconducting conductor or a superconducting coil.
- the superconducting cable shown in FIG. 7 a lead-out structure as shown in FIGS. 8 (A) and 8 (B) is formed.
- Fig. 7 is a cross-sectional configuration diagram showing the outline of a three-core batch type superconducting cable
- Fig. 8 is a terminal structure of a three-core batch type superconducting cable
- Fig. 8 (A) shows the case of an AC line.
- Figure 8 (B) shows the case of a DC line.
- This superconducting cable 100 has a configuration in which a three-core cable core 102 is housed in a heat insulating tube 101, and each core 102 includes a former 200, a first superconducting layer 201, and an electric insulating layer 202 in order of central force.
- the second superconducting layer 203 and the protective layer 204 are provided.
- the first superconducting layer 201 and the second superconducting layer 203 are made of a superconducting material. For example, when performing three-phase AC power transmission, the first superconducting layer 201 of each core 102 is used as a superconducting conductor, and the second superconducting layer 203 Is used as the superconducting shield layer.
- the first superconducting layer 201 of one core is a positive line
- the first superconducting layer 201 of the other core is a negative line
- the second superconducting layer 203 of these two cores is A neutral wire
- the remaining core is used as a spare wire.
- the first superconducting layer 201 of one core goes out, and the second superconducting layer 203 of this core is returned. The remaining core is used as a spare line.
- a terminal structure that connects the low temperature side and the normal temperature side is formed at the end of the superconducting cable line using such a superconducting cable (see, for example, Patent Document 1).
- this terminal structure is composed of an end portion of a superconducting cable 100 and a termination junction box 300 that accommodates this end portion.
- the terminal refrigerant tanks 301 and 302 in which the end portions of the core 102 are housed, and the terminal vacuum heat insulating tank 303 disposed so as to cover the outer periphery of the terminal refrigerant tanks 301 and 302 are provided.
- the ends of the cores 102 are stripped to expose the first superconducting layer 201 and the second superconducting layer 203, which are introduced into the terminal refrigerant tanks 301 and 302, respectively.
- the first superconducting layer 201 is connected to a pushing 310 containing a lead portion 311 having a copper force.
- a soot pipe 312 is arranged on the room temperature side of the pushing 310.
- the low-temperature side force can also draw power from the normal temperature side or from the normal temperature side to the low temperature side through the pushing 310.
- an epoxy unit 313 is disposed on the outer periphery of a portion disposed in the vicinity between the terminal refrigerant tank 301 and the terminal refrigerant tank 302.
- the second superconducting layer 203 requires a ground voltage. Therefore, as shown in FIG. 8 (A), a three-core second superconducting layer 203 is connected by a short-circuit portion 210, and a ground wire 211 is connected to the short-circuit portion 210 to obtain a ground potential.
- the ground wire 211 passes through the refrigerant tank 302 and the vacuum heat insulating tank 303 and is drawn to the outside at room temperature and grounded.
- a current equal to that of the first superconducting layer 201 always flows in the second superconducting layer 203 as a return conductor.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-238144
- the current transmission and distribution lines are mainly configured for AC use, but the transmission capacity and transmission loss are For example, direct current transmission is much more advantageous. Therefore, it may be desirable to change the AC line to the DC line. At this time, diversion of the cable can be easily performed.
- the AC line and the DC line have different terminal structures due to the different currents flowing in the second superconducting layer. It is difficult to use.
- the grounding wire connected to the second superconducting layer on the AC line may have a relatively small cross-sectional area of the conductor portion since the flowing current is small.
- the lead connected to the second superconducting layer passes the current. Therefore, a conductor with a large cross-sectional area is required. Therefore, even if the ground wire in the AC line is diverted to the lead portion in the DC line, it is almost impossible to pass the necessary current.
- the lead area when there is a request to change from a DC line to an AC line, the lead area must have a large cross-sectional area as described above even if the ground potential can be obtained using the lead part of the DC line. Therefore, there is a problem that the heat penetration through the lead portion becomes larger than necessary.
- the terminal structure is provided at both ends of the line, while the ground line in the AC line may be connected to only one end of both ends, whereas the lead part in the DC line is provided at both ends. . Therefore, when changing an AC line to a DC line, it is necessary to newly provide a lead part on one end side of the line, and when changing a DC line to an AC line, the lead part on one end side of the line is unnecessary. As described above, the heat penetration increases.
- the conductor cross-sectional area of the lead portion incorporated in the pushing is designed so that a desired power can be obtained or a desired current can flow, the required power changes thereafter. However, it cannot be easily changed according to the electric power, and there may be excess or deficiency in response to new requirements. Therefore, it is desirable to develop a structure that can easily change the amount of electric power that can be extracted in response to various demands without causing an excessive increase in heat penetration.
- Such a structure capable of changing the magnitude of the extracted electric power (current) is also desired in superconducting equipment such as a superconducting fault current limiter, a superconducting transformer, and a superconducting power storage device, which is not only a superconducting cable.
- the main object of the present invention is to make it possible to easily change the amount of power drawn from the low temperature side to the normal temperature side or the normal temperature side power low temperature side without excessively increasing heat loss. It is to provide a drawer structure. Another object of the present invention is to provide a superconducting cable line having the power drawing structure.
- the present invention achieves the above object by providing a detachable configuration of the bow I conductor portion disposed between the low temperature side and the normal temperature side. That is, the present invention relates to a power drawing structure for a superconducting device that inputs or outputs power between a low temperature side and a normal temperature side, and a refrigerant tank in which a superconducting portion of the superconducting device is stored, and the refrigerant It is possible to establish electrical continuity between the low temperature side and the normal temperature side by arranging the vacuum heat insulation tank to cover the outer periphery of the tank and one end side at the normal temperature side and the other end side connected to the superconducting part. And a lead conductor portion.
- the lead conductor part has a low temperature side conductor part connected to the superconducting part and a normal temperature side conductor part arranged on the normal temperature side, and the low temperature side conductor part and the normal temperature side conductor part are detachable. Shall. The present invention will be described in detail below.
- the superconducting part may include a first superconducting layer and a second superconducting layer disposed coaxially on the outer periphery of the first superconducting layer.
- the superconducting part may be a superconducting coil formed from a superconducting material or a superconducting current limiting element.
- the superconducting part is housed in a refrigerant tank.
- the refrigerant tank is filled with a refrigerant that cools and holds the superconducting part in the superconducting state.
- the refrigerant include liquid nitrogen, liquid hydrogen, and liquid helium.
- a vacuum heat insulating tank is provided on the outer periphery of the refrigerant tank so as to cover the refrigerant tank. In addition to evacuating the inside to a predetermined degree of vacuum, the vacuum heat insulating tank may be configured to reflect a radiant heat by disposing a heat insulating material such as a super insulation (trade name).
- These refrigerant tanks and vacuum insulation tanks are made of a metal such as stainless steel, which has excellent strength.
- Electric conduction can be established between the low temperature side and the normal temperature side where the current flowing through the superconducting portion housed in the refrigerant tank flows to the normal temperature side, or the current from the normal temperature side flows to the superconductive portion. It has a lead conductor. One end of the lead conductor is disposed on the room temperature side, and the other end is connected to the superconductor.
- the most characteristic feature of the present invention lies in that the lead conductor portion is configured to be a detachable split member force.
- the lead conductor portion is composed of a plurality of divided members including a low temperature side conductor portion electrically connected to the superconducting portion and a normal temperature side conductor portion arranged on the normal temperature side.
- the conductor cross-sectional area of the lead conductor portion can be changed. That is, when the low-temperature side conductor and the normal-temperature side conductor are connected, they can conduct electricity, so that the lead conductor has a predetermined conductor cross-sectional area designed in advance. Since the lead conductor portion is in a non-conducting state when the conductor is separated, the conductor cross-sectional area in a conductive state is zero.
- the conductor cross-sectional area in a conductive state can be changed depending on the number of connections between the low-temperature side conductor portions and the normal-temperature side conductor portions. That is, in the structure of the present invention, the number of connections can be changed according to the required power (current). For example, when the required power is large, the number of connections is increased and the required power is small. The number of connections can be reduced. At this time, the low-temperature side conductor part and the normal-temperature side conductor part of the unnecessary lead conductor part are disconnected so that almost no increase in heat penetration through the disconnected conductor part is eliminated. Can do.
- a plurality of lead conductor portions having the same conductor cross-sectional area may be provided, and the conductor cross-sectional area in a conductive state may be changed in the whole lead conductor portion depending on the number of connections.
- the conductor cross-sectional area in the conductive state in the entire lead conductor part may be changed.
- a lead conductor part having a large conductor cross-sectional area and a lead conductor part having a small conductor cross-sectional area are provided, and the lead conductor part having a large cross-sectional area is provided according to the required power (current).
- an extraction conductor portion having a small cross-sectional area may be connected. Also in this case, by increasing the low temperature side conductor portion and the normal temperature side conductor portion of the unnecessary lead conductor portion, it is possible to prevent an increase in heat penetration through the lead conductor portion in the non-connected state.
- the conductor cross-sectional area can be easily changed according to the demand.
- heat penetration does not occur through the lead conductor portion where the low temperature side conductor portion and the normal temperature side conductor portion are not connected, loss due to heat penetration can be effectively prevented.
- each lead conductor portion should have a conductor cross-sectional area and a length so that the ratio (S / d) between the conductor cross-sectional area S and the length d is constant. It is preferable. Therefore, if the current flowing through the lead conductor is small, the conductor cross-sectional area can be reduced by reducing the conductor cross-sectional area.
- the length should be increased and the length should be increased to achieve thermal insulation.
- the conductor cross-sectional area of the whole lead conductor portion can be increased. Therefore, by combining a plurality of lead conductor portions having a small conductor cross-sectional area and enlarging the conductor cross-sectional area of the whole lead conductor portion, the size of each lead conductor portion can be further reduced. That is, when the ratio S / d is constant, a lead conductor portion having a plurality of conductor cross-sectional areas and a short length can be used instead of a lead conductor portion having a large conductor cross-sectional area and a long length.
- the lead conductor portion is not limited to a conductor having a uniform cross-sectional area in the longitudinal direction, and may have a shape having a different conductor cross-sectional area in the longitudinal direction. It is possible to use a material made of a different material in the longitudinal direction. Examples of the material for forming the lead conductor portion include materials having excellent conductivity, such as copper, copper alloy, aluminum, and aluminum alloy. When the lead conductor portion is formed of different materials in the longitudinal direction, it is preferable to use at least two kinds of metal materials selected from the above metal materials.
- the normal temperature side conductor portion can be a rod-shaped body, and the low temperature side conductor portion can be fitted with a rod-shaped normal temperature side conductor portion. It can be mentioned that it has a cylindrical shape.
- the rod-shaped room-temperature side conductor part may be inserted into the cylindrical low-temperature side conductor part to connect them, but an elastic contactor is provided on at least one of the low-temperature side conductor part and the room-temperature side conductor part. It is good also as a structure which connects both through the said elastic contact, when it prepares and the normal temperature side conductor part is fitted to the low temperature side conductor part.
- Such an elastic contact may be provided on the inner peripheral surface of the low-temperature side conductor portion that is cylindrical, or the room-temperature side that is rod-shaped. You may provide in the outer peripheral surface of a conductor part, and may provide in both. As such a cylindrical member
- a multi-contact (trade name) marketed as a connector for conductor connection or a so-called one-lip contact may be used.
- the tulip contact is a cylindrical member, and the side on which the rod-shaped body is inserted is divided by a plurality of slits in the longitudinal direction, and the bent portions are contracted radially in the vicinity of the open ends of these divided pieces.
- the cylindrical member and the rod-shaped body are in contact with each other by the elasticity of the bent portion.
- the room temperature side conductor may be shaped to have a uniform cross-sectional area in the longitudinal direction as long as the size is adjusted to the desired conductor cross-sectional area!
- the areas may be partially different or may be formed of different materials in the longitudinal direction.
- the low temperature side conductor portion and the normal temperature side conductor portion may be formed of the same kind of conductive material, or may be formed of different kinds of conductive materials.
- the low temperature side conductor part and the normal temperature side conductor part for example, one end of the low temperature side conductor part is arranged in a refrigerant tank, and the other end is arranged in a vacuum heat insulation tank, and one end of the normal temperature side conductor part is vacuum insulated.
- positioned outside which is normal temperature is mentioned.
- the low temperature side conductor portion connected to the superconducting portion is arranged in the refrigerant tank, and the other end is protruded from the vacuum heat insulation tank, and the low temperature side conductor portion is fixed to the refrigerant tank.
- the fixing portion of the low temperature side conductor in the refrigerant tank has a sufficient sealing structure so that the refrigerant does not leak from the refrigerant tank to the vacuum heat insulation tank, and the low temperature side conductor and the refrigerant tank are electrically connected.
- a sealing structure or an insulating structure that is used when the bushing is disposed across the refrigerant tank power vacuum insulation tank in the conventional power drawing structure may be applied.
- the fixed part of the room temperature side conductor in the vacuum insulation tank should have a sufficient sealing structure so that the vacuum state of the vacuum insulation tank is not destroyed, so that the room temperature side conductor and the vacuum insulation tank are electrically insulated.
- a heat insulating structure is preferable. For example, cover the outer periphery of the room temperature side conductor with a material with excellent electrical and thermal insulation properties such as FRP and epoxy resin. Is preferably provided.
- a soot tube filled with an insulating fluid such as an insulating gas may be disposed on the outer periphery of a portion that protrudes from the vacuum heat insulation tank and is disposed on the room temperature side.
- one end of the normal temperature side conductor portion disposed in the vacuum heat insulation bath is vacuum insulated.
- the low temperature side conductor and the room temperature side conductor are located near the place where the room temperature side conductor is fixed in the vacuum insulation tank so that the other end of the low temperature side conductor placed in the tank can be moved close to and away from the other end.
- a stretchable part that can be stretched with the attachment and detachment of the part is prepared.
- the expansion / contraction part uses a bellows tube having excellent flexibility.
- the lead conductor portion By connecting one end of the normal temperature side conductor portion to the other end side of the low temperature side conductor portion with the above configuration, the lead conductor portion becomes conductive, and power is supplied between the low temperature portion and the normal temperature portion. I can do it.
- the lead conductor can be in a non-conductive state between the low temperature part and the normal temperature part. It is possible to prevent the heat penetration to the low temperature side through the normal temperature side force.
- the vacuum heat insulation tank in a vacuum state will not return to room temperature or break the vacuum due to the attachment / detachment of the lead conductor part. There is no need to lower the temperature or perform vacuuming separately.
- the low temperature side conductor part and the normal temperature side conductor part for example, one end of the low temperature side conductor part is arranged in the refrigerant tank, the other end is arranged outside the refrigerant tank, and the normal temperature side conductor part is vacuumed.
- An example is a form in which it is arranged through a through hole provided in the heat insulation tank.
- the normal temperature side conductor portion is always fixed to the vacuum heat insulating tank as described above, and the normal temperature side conductor portion is attached only when it is not necessary to connect or disconnect the low temperature side conductor portion.
- the structure is fixed to a vacuum heat insulating tank or an auxiliary vacuum tank described later.
- the vacuum insulation tank is provided with a through-hole through which the room-temperature side conductor can pass, and when necessary, the room-temperature-side conductor is placed through this hole and connected to the low-temperature side conductor.
- the low temperature side conductor portion is fixed to the refrigerant tank, and one end connected to the superconducting portion is arranged in the refrigerant tank, and the other end is outside the refrigerant tank, specifically In such a case, it is arranged so as to protrude into a vacuum heat insulation tank or an auxiliary heat insulation tank provided separately.
- the room temperature side conductor When the outside of the refrigerant tank is a vacuum heat insulation tank, if necessary, the room temperature side conductor is placed through the through hole and connected to the low temperature side conductor. After connection, the room temperature side conductor is placed in the vacuum heat insulation tank. To fix. Further, when the normal temperature side conductor portion is not connected to the low temperature side conductor portion (unnecessary), the insertion hole is closed with a lid or the like so that the vacuum state of the vacuum heat insulating tank can be maintained.
- the lid should be made of FRP or epoxy resin with low thermal conductivity.
- an auxiliary heat insulating tank is provided separately from the vacuum heat insulating tank.
- the through hole is provided over the surface force refrigerant tank of the vacuum heat insulating tank, and an auxiliary vacuum tank is provided so that the inner peripheral space of the insertion hole can be maintained in a vacuum state.
- this configuration is a configuration in which an auxiliary vacuum chamber is provided as a vacuum space independent of the vacuum heat insulating chamber.
- the insertion holes are prepared, for example, as cylindrical members, provided in the vacuum heat insulation tank and the refrigerant tank with holes suitable for the openings at both ends of the cylindrical member, and the holes of the refrigerant tank and the vacuum heat insulation tank and the cylindrical members. It can be formed by connecting the opening to each other by welding or the like.
- a cylindrical member is formed into a relatively thin cylindrical shape using a material having excellent strength such as metal, and then coated with a material having excellent thermal insulation properties such as FRP and epoxy resin on the outer periphery. It is preferable to provide a layer and arrange this coating layer so as to be on the vacuum heat insulating tank side, since the thermal insulation can be improved.
- the auxiliary vacuum chamber shall have at least the space on the inner periphery side of this through hole, and a part of the auxiliary vacuum chamber which may be changed in length according to the length of the normal temperature side conductor portion, etc. is used as the vacuum heat insulation tank. You may make it project.
- the auxiliary vacuum chamber is provided such that a vacuum layer is present on the outer periphery of most of the room temperature side conductor portion excluding a place to be arranged outside at room temperature.
- the auxiliary vacuum chamber is provided with a second through-hole through which the room-temperature side conductor can be inserted. When necessary, the room-temperature-side conductor is placed through the through-hole and the second through-hole.
- the second through hole is closed with a strong lid such as FRP or epoxy grease so that the vacuum state of the auxiliary heat insulation tank can be maintained. It is good to leave.
- the lid is opened and auxiliary disconnection is performed. Only return the heat bath to room temperature and normal pressure (atmospheric pressure), connect it (or remove it), and vacuum the auxiliary heat insulation bath. Can be attached and detached.
- the fixed portion of the low temperature side conductor portion in the refrigerant tank is sufficient to prevent the refrigerant from leaking from the refrigerant tank to the vacuum heat insulating tank or the auxiliary heat insulating tank.
- a sealing structure or an insulating structure that is used when the bushing is arranged over the vacuum insulation tank from the refrigerant tank to the conventional power bow I cutout structure may be applied.
- the room temperature side conductor is fixed to a room temperature side conductor so that the vacuum state of the vacuum heat insulation tank or auxiliary heat insulation tank after evacuation is not broken V.
- a coating layer on the outer periphery of the room temperature side conductor portion with a material having excellent electrical and thermal insulation properties such as FRP and epoxy resin.
- a pipe or the like filled with an insulating fluid such as an insulating gas is arranged on the outer periphery of the part that protrudes from the vacuum heat insulation tank or the auxiliary heat insulation tank and is arranged on the room temperature side.
- one end of the normal temperature side conductor is passed through the through hole and connected to the low temperature side conductor, so that the normal temperature conductor is always fixed to the vacuum heat insulating tank.
- the lead conductor portion is in a conductive state, and power can be supplied between the low temperature portion and the normal temperature portion. Also, by pulling out the through-hole force of the normal temperature side conductor part and separating it from the low temperature side conductor part, the lead conductor part makes the non-conducting state between the low temperature part and the normal temperature part, and this lead conductor part is Therefore, heat intrusion from the normal temperature side to the low temperature side can be prevented.
- Such a lead conductor portion may be provided in a terminal structure formed at the end portion of a line when a superconducting device is used as a superconducting cable and a cable line is constructed using this superconducting cable.
- the superconducting cable serves as a superconducting part, and includes a first superconducting layer and a second superconducting layer disposed coaxially with the first superconducting layer via an electrical insulating layer provided on the outer periphery of the first superconducting layer. If a layer is provided, the first superconducting layer and the second superconducting layer It is preferable that at least one of the conductive layers includes the lead conductor portion.
- the lead conductor part may be provided only in the first superconducting layer, the lead conductor part may be provided only in the second superconducting layer, or the lead conductor is provided in both the first superconducting layer and the second superconducting layer. May be provided
- the conductor cross-sectional area is changed to an appropriate size by attaching and detaching the lead conductor portion, thereby changing the AC power transmission line to the DC power transmission line.
- the change from the DC power transmission line to the AC power transmission line can be easily performed.
- the low temperature side conductor portion and the normal temperature side conductor portion of the lead conductor portion not used can be separated from each other to prevent heat from entering through the lead conductor portion.
- the conductor cross-sectional area can be reduced by attaching / detaching the lead conductor part when the required power is changed in addition to the change in the power transmission type. By changing to an appropriate size, the required power can be supplied without excess or deficiency. At this time, in the same manner as described above, the unused lead conductor part can be prevented from entering through the lead conductor part by leaving the lead conductor part unconnected.
- the lead conductor portion may be provided at an arbitrary position along the line.
- the conductor cross-sectional area By setting the conductor cross-sectional area to an appropriate size by attaching and detaching the lead conductor part in the middle of the track, it is possible to change the power that can be drawn according to the size of the load and to respond to changes in the power transmission and distribution route.
- the lead conductor portion that is not used in the same manner as described above should be separated to prevent an increase in heat penetration.
- the configuration in which the lead conductor is provided in the middle of the line is preferably applied to a low-voltage transmission line (distribution line) in which an insulating structure can be easily formed in consideration of insulation.
- a more specific configuration of the superconducting cable includes a configuration in which one or more cable cores are housed in a heat insulating tube.
- the heat insulation pipe has a double structure of an inner pipe and an outer pipe, and a configuration in which a vacuum is drawn between the inner pipe and the outer pipe can be mentioned.
- Such a heat insulating tube is preferably made of a corrugated tube made of a metal such as stainless steel having excellent strength and excellent in flexibility.
- Cable core A configuration having a former, a first superconducting layer, an electrical insulating layer, a second superconducting layer, and a protective layer in order from the center can be mentioned.
- a semiconductive layer may be provided on the inner peripheral side of the electric insulating layer (the outer peripheral side of the first superconducting layer) or on the outer peripheral side of the electric insulating layer (the inner peripheral side of the second superconducting layer).
- a single-core cable having one cable core in the heat insulation pipe may be used, or a multi-core cable having a plurality of cables may be used.
- a space surrounded by the outer periphery of the core and the inner periphery of the inner tube in the inner tube in which the cable core is accommodated serves as a refrigerant flow path for cooling the superconducting portion (the first superconducting layer and the second superconducting layer).
- the refrigerant include liquid nitrogen.
- the conductor cross-sectional area can be easily changed by dividing the lead conductor portion between the low temperature side and the normal temperature side and detaching both.
- connecting the low-temperature side and the normal-temperature side of the lead conductor part ensures the desired conductor cross-sectional area and enables power transmission, and disconnecting both prevents heat intrusion via the lead conductor part.
- the structure of the present invention having such a configuration is used for a superconducting cable line, for example, it can be easily changed from an AC line to a DC line, or from a DC line to an AC line.
- the conductor cross-sectional area can be changed by attaching and detaching the lead conductor part, and power can be drawn out as required without excessively increasing heat penetration. it can. Furthermore, by providing the structure of the present invention at an arbitrary location on the superconducting cable line, it is possible to easily cope with changes in the power extraction location due to a route change or the like.
- the structure of the present invention can be applied to other superconducting equipment that transfers power between a low temperature side and a normal temperature side, which is only a superconducting cable, such as a superconducting transformer, a superconducting current limiter, and a superconducting power. It can also be applied to storage devices.
- Fig. 1 is a schematic configuration diagram of a power drawing structure of the present invention, showing an example in which a normal temperature side conductor is fixed to a vacuum heat insulating tank.
- FIG. 2 (A) is a schematic configuration diagram of the lead conductor portion used in the power lead structure of the present invention, and the cross-sectional area of the room temperature side conductor portion is uniform in the longitudinal direction. An example where the cross-sectional area is large and the length is long is shown.
- FIG. 2 (B) is a schematic configuration diagram of the lead conductor part used in the power lead structure of the present invention, and the cross-sectional area of the room temperature side conductor part is uniform in the longitudinal direction, An example where the cross-sectional area is small and the length is short is shown.
- FIG. 2 (C) is a schematic configuration diagram of an extraction conductor portion used in the power extraction structure of the present invention, and shows an example in which the cross-sectional area of the room temperature side conductor portion is different in the longitudinal direction.
- FIG. 3 is a schematic configuration diagram showing an example in which the room temperature side conductor portion is not always fixed to the vacuum heat insulating tank in the power drawing structure of the present invention.
- Fig. 4 (A) is a schematic configuration diagram showing an example of the power drawing structure of the present invention in which the normal temperature side conductor portion is not always fixed to the vacuum heat insulating tank, and the normal temperature side conductor portion is short. Show.
- FIG. 4 (B) is a schematic configuration diagram showing an example of the power drawing structure of the present invention in which the normal temperature side conductor is not always fixed to the vacuum heat insulating tank, and the normal temperature side conductor is long. Indicates.
- FIG. 5 (A) is a schematic configuration diagram of a terminal portion in a superconducting cable line having the power drawing structure of the present invention, and shows an example of an AC power transmission line.
- FIG. 5 (B) shows a superconducting cable line having the power drawing structure of the present invention.
- FIG. 6 is a schematic configuration diagram of a superconducting transformer having the power drawing structure of the present invention.
- FIG. 7 is a cross-sectional configuration diagram showing an outline of a three-core collective superconducting cable.
- FIG. 8 (A) is a schematic configuration diagram showing a terminal structure of a conventional superconducting cable line, and shows an example of a terminal structure included in an AC power transmission line.
- FIG. 8 (B) is a schematic configuration diagram showing a terminal structure of a conventional superconducting cable line, and shows an example of a terminal structure provided in a DC power transmission line.
- FIG. 1 is a schematic configuration diagram of a power drawing structure according to the present invention.
- the electric power drawing structure of the present invention has a refrigerant tank 20 in which the superconducting part 10 included in the superconducting device is stored, a vacuum heat insulating tank 30 arranged so as to cover the outer periphery of the refrigerant tank 20, and one end side arranged on the room temperature side, The other end side is connected to the superconducting portion 10 and includes a lead conductor portion 40 capable of establishing electrical continuity between the low temperature side and the normal temperature side.
- the most characteristic feature of the power lead structure according to the present invention is that the lead conductor portion 40 is divided into the normal temperature side and the low temperature side, and both are detachable.
- the lead conductor part 40 is disposed on the low temperature side and is connected to the superconducting part 10 and the low temperature side conductor part 41 is disposed on the room temperature side, and the room temperature side conductor part 42 is detachable from the low temperature side conductor part 41.
- the superconducting portion 10 included in the superconducting device is formed from a superconducting material such as an oxide-based superconducting material and is stored in the refrigerant tank 20.
- the superconducting unit 10 include a superconducting conductor of a superconducting cable, a superconducting shield layer, a superconducting transformer, a superconducting current limiter, a superconducting coil of a superconducting power storage device, and a superconducting current limiting element.
- a refrigerant for cooling in order to maintain the superconducting portion 10 in a superconducting state is circulated.
- a vacuum insulation tank 30 is arranged to reduce the heat penetration of external force at room temperature.
- the refrigerant tank 20 and the vacuum heat insulating tank 30 are made of stainless steel containers having excellent strength.
- a heat insulating material called super insulation is disposed in the vacuum heat insulating tank 30 and evacuation is performed to a predetermined degree of vacuum.
- a power drawing structure using the drawing conductor portion 40 is formed at a place where power is input or output between the low temperature side and the normal temperature side.
- the lead conductor part 40 used in this example has a configuration in which the low temperature side conductor part 41 is fixed to the refrigerant tank 20, and the normal temperature side conductor part 42 is fixed to the vacuum insulation tank 30, and the vacuum insulation tank 30 is in a vacuum state. In this state, the room temperature side conductor portion 42 can be attached to and detached from the low temperature side conductor portion 41 in a state where the above is maintained. That is, in this configuration, when the lead conductor portion 40 is attached or detached, it is not necessary to return the vacuum heat insulating tank 30 to room temperature and normal pressure (atmospheric pressure).
- the normal temperature side conductor portion 42 is a rod-shaped body having a predetermined cross-sectional area
- the low temperature side conductor portion 41 is a cylindrical body into which the rod-shaped normal temperature side conductor portion 42 can be fitted.
- the cylindrical body has a plurality of elastic contacts (not shown) on the inner peripheral surface.
- the elastic contactor is interposed therebetween.
- the low temperature side conductor part 41 and the normal temperature side conductor part 42 are firmly in contact.
- these contactors come into contact with the outer peripheral surface of the normal temperature side conductor portion 42, the low temperature side conductor portion 41 and the normal temperature side conductor portion 42 become conductive.
- the low temperature side conductor part 41 and the normal temperature side conductor part 42 are made of a conductive material that is in contact with copper. With this configuration, by inserting the room-temperature side conductor part 42 into the low-temperature side conductor part 41, both parts 41 and 42 are electrically connected so that power can be transferred between the low-temperature side and the room-temperature side. Then, by pulling out the normal temperature side conductor portion 42 from the low temperature side conductor portion 41, both the portions 41 and 42 become non-conductive.
- the low-temperature side conductor portion 41 is fixed to the refrigerant tank 20. Specifically, one end is electrically connected to the superconducting portion 10, and this connection side is disposed in the refrigerant tank 20. The other end projects from the vacuum heat insulation tank 30. In the low temperature side conductor 41, the refrigerant flows out of the refrigerant tank 20 to the vacuum heat insulation tank 30 or the refrigerant tank 20 and the low temperature side conductor 41 are electrically connected to the fixed portion of the refrigerant tank 20. In order to prevent this, a low-temperature side seal 21 is provided on the outer periphery with an insulating material connected to FRP.
- the room temperature side conductor portion 42 is fixed to the vacuum heat insulating tank 30. Specifically, one end is vacuum It arrange
- the vacuum insulation tank 30 is fixed at a place where the vacuum insulation tank 30 is fixed in the room temperature side conductor part 42, the vacuum insulation tank 30 is electrically connected to the room temperature side conductor part 42, or the vacuum insulation tank 30 is electrically connected to the outside.
- the room temperature side seal 31 is made of a material with excellent electrical and thermal insulation, such as FRP, on the outer periphery of the outer wall to prevent heat penetration from the outside.
- a lead 43 connected to an external device or the like is attached to the other end side arranged on the room temperature side.
- a soot tube filled with an insulating fluid such as an insulating gas may be disposed.
- the configuration relating to these reeds and soot tubes is the same as in Examples 2 and 3 described later.
- a telescopic portion 32 is provided in the vicinity of the fixed portion of the normal temperature side conductor portion 42.
- the stretchable portion 32 is a stainless corrugated tube excellent in strength and flexibility.
- the lead conductor part 40 becomes conductive and the low temperature side conductor part 41 is connected to the room temperature side.
- the lead conductor portion 40 becomes non-conductive. Therefore, by changing the number of connections between the low temperature side conductor portion 41 and the normal temperature side conductor portion 42, the conductor cross-sectional area of the lead conductor portion 40 can be easily changed. That is, in the structure of the present invention, the low temperature side conductor portion 41 and the normal temperature side conductor portion 42 can be connected so that a conductor cross-sectional area corresponding to the required power (current) can be secured.
- the low temperature side conductor part 41 and the normal temperature side conductor part 42 can be kept from being connected. Therefore, even if the plurality of lead conductor portions 40 are provided, heat intrusion through unnecessary lead conductor portions can be prevented.
- the power extraction structure of the present invention can easily change the conductor cross-sectional area as required, and can prevent excessive heat intrusion.
- the items relating to the lead conductor portion described below are the same as in the second and third embodiments.
- the first embodiment an example in which two lead conductor portions are provided has been described. However, only one lead conductor portion or three or more lead conductor portions may be provided.
- the cross-sectional area is uniform in the longitudinal direction, and the force using two lead conductors having the same cross-sectional area is the same.
- the conductor cross-sectional area in the conductive state can be changed by changing the number of connections.
- a plurality of lead conductor portions having different cross-sectional areas may be provided in combination. For example, if one lead conductor portion 40A has a large cross-sectional area S and a long length d as shown in FIG.
- the other lead conductor 40B has a small cross-sectional area S and a short length d as shown in Fig. 2 (B).
- the conductor cross-sectional area in the conductive state can be changed by selecting the lead conductor portion to be connected. For example, when large electric power (current) is required, the low temperature side conductor 41 of the lead conductor 40A and the room temperature side conductor 42 are connected, and the low temperature side conductor 41 of the lead conductor 40B and the room temperature side conductor 42. 42, and a small electric power (current) is required, the reverse of the above, that is, the low temperature side conductor 41 and the normal temperature side conductor 42 of the lead conductor 40A are separated and the lead conductor 40B The low temperature side conductor 41 and the normal temperature side conductor 42 may be connected.
- the lead conductor portions having the same cross-sectional area are made of a plurality of materials having different conductivities, and by selecting the lead conductor portion to be connected, the required power (current) can be handled. You can rub it.
- the low-temperature side conductor of the lead conductor portion made of a material with low conductivity is connected by connecting the low-temperature side conductor portion of the lead conductor portion made of a material with high conductivity to the normal-temperature side conductor portion. If the low temperature side conductor and the room temperature side conductor are separated from the room temperature side conductor, the low temperature side conductor and the room temperature side conductor of the lead conductor made of a material with high conductivity are reversed.
- the low-temperature side conductor part and the room-temperature side conductor part of the lead conductor part made of a material having low conductivity.
- the lead conductor portion made of materials having a uniform cross-sectional area in the length direction of the lead conductor portion and having different conductivity in the length direction, and selecting the lead conductor portion to be connected, The power input / output may be changed.
- a conductor having a different cross-sectional area in the length direction of the normal temperature side conductor portion 42 such as the lead conductor portion 40C!
- the room temperature side conductor portion 42 of the lead conductor portion 40C has a length d, a cross-sectional area S force, a small portion, and a portion where the cross-sectional area S is large.
- the ratio (S / d) between the cross-sectional area S and the length d is made constant.
- FIG. 3 is a schematic configuration diagram showing an example of the power drawing structure of the present invention having a through hole through which a normal-temperature side conductor portion can be inserted into a vacuum heat insulating tank.
- the power drawing structure of the present invention shown in this example includes a refrigerant tank 20 in which a superconducting part 10 included in a superconducting device is accommodated, a vacuum heat insulating tank 30 disposed so as to cover the outer periphery of the refrigerant tank 20, and one end side at a room temperature side.
- the other end side is connected to the superconducting part 10 and includes a lead conductor part 40 capable of establishing electrical continuity between the low temperature side and the normal temperature side.
- the lead conductor portion 40 includes a low temperature side conductor portion 41 disposed on the low temperature side and connected to the superconducting portion 10, and a normal temperature side conductor portion 42 disposed on the normal temperature side and attachable to and detachable from the low temperature side conductor portion 41.
- the low temperature side conductor portion 41 is fixed to the refrigerant tank 20 and is disposed so as to protrude into the vacuum heat insulating tank 30 having one end inside the refrigerant tank 20 and the other end outside the refrigerant tank 20. Further, a low temperature side seal portion 21 is provided at a location where the refrigerant tank 20 is fixed in the low temperature side conductor portion 41.
- the lead conductor portion 40 used in this example has the same configuration as in Example 1. That is, a rod-shaped body having a predetermined cross-sectional area is used as the room temperature side conductor portion 42, and a cylinder body into which the rod-shaped room temperature side conductor portion 42 can be fitted as a low temperature side conductor portion 41.
- the one having an elastic contact (not shown) was used. Therefore, in the same way as in Example 1, the lead conductor portion 40 is connected to the normal temperature side conductor portion 42 through the elastic contact by inserting the normal temperature side conductor portion 42 into the low temperature side conductor portion 41, and becomes the normal temperature side conductor. By pulling the part 42 out of the low temperature side conductor part 41, the non-conducting state is obtained.
- the vacuum heat insulating tank 30 shown in this example has a through hole 35A that penetrates the front and back of the tank 30 and allows the room temperature side conductor portion 42 to pass therethrough.
- the through hole 35A when the normal temperature side conductor portion 42 is connected to the low temperature side conductor portion 41, the normal temperature side conductor portion 42 is placed through, and after the connection, the normal temperature side conductor portion 42 is fixed.
- a room temperature side sealing portion 31 is provided at a fixed location of the room temperature side conductor portion 42 for the purpose of maintaining the vacuum state of the vacuum heat insulating tank 30.
- the normal temperature side conductor portion 42 and the low temperature side conductor portion 41 are removed and brought into a non-connected state, the normal temperature side conductor portion 42 is not fixed to the vacuum heat insulating tank 30 but is placed outside the tank 30. At this time, The through hole 35A is closed with a lid 36 that maintains the vacuum state of the vacuum heat insulating tank 30.
- the lid 36 is formed of FRP.
- the lead conductor portion 40 becomes conductive by inserting the room temperature side conductor portion 42 into the through hole 35A and connecting it to the low temperature side conductor portion 41.
- the lead conductor portion 40 becomes non-conductive. Therefore, the conductor cross-sectional area of the lead conductor portion 40 can be easily changed by changing the number of connections between the low temperature side conductor portion 41 and the normal temperature side conductor portion 42 as in the first embodiment.
- the low-temperature side conductor 41 and the room-temperature side conductor 42 are connected so that the conductor cross-sectional area corresponding to the required power is obtained, and the low-temperature side conductor 41 and the room-temperature-side conductor of the unnecessary lead conductor are connected.
- the power drawing structure of the present invention can easily change the cross-sectional area of the conductor as required, and can prevent excessive heat penetration.
- one force may be used, or two or more force conductors may be provided.
- the vacuum heat insulation tank When connecting the room temperature side conductor to the low temperature side conductor, open the cover of the insertion hole and return the inside of the vacuum insulation tank to room temperature and normal pressure (atmospheric pressure). Then, after connecting and fixing the room temperature side conductor part to the vacuum heat insulation tank, the vacuum heat insulation tank may be evacuated to a predetermined degree of vacuum. Similarly, when removing the normal temperature side conductor part and the low temperature side conductor part, it is better to return the inside of the vacuum heat insulation tank to normal temperature and normal pressure and perform evacuation again.
- FIG. 4 (A) and 4 (B) are schematic configuration diagrams showing an example in which the power extraction structure of the present invention includes an auxiliary heat insulating tank in which the room temperature side conductor portion is inserted and arranged.
- A) shows an example in which the normal temperature side conductor is short
- FIG. 4B shows an example in which the normal temperature side conductor is long.
- the basic structure of the power drawing structure of the present invention shown in this example is the same as that of Example 2.
- the through hole 35B is provided over the surface force of the vacuum heat insulating tank 30 and the refrigerant tank 20, and the hole 35B The difference is that it has an auxiliary heat insulation tank 37 that keeps the inner space in a vacuum state.
- the through hole 35B was formed as follows. Low temperature side conductor 41, normal temperature side A cylindrical member through which the conductor portion 42 can pass is prepared, and holes corresponding to the openings of the cylindrical member are provided in the vacuum heat insulating tank 30 and the refrigerant tank 20, respectively.
- the tubular member used was a stainless steel pipe with excellent strength.
- a cylindrical member is disposed between the vacuum heat insulating tank 30 and the refrigerant tank 20, and one opening of the cylindrical member is fixed to the hole of the vacuum heat insulating tank 30 by fixing it, for example.
- the through hole 35B was formed by fixing the part to the hole of the refrigerant tank 20 by welding or the like.
- the coating layer 38 was formed of a material.
- the low temperature conductor 41 is fixed to the through hole 35B on the refrigerant tank side. That is, the low temperature side conductor portion 41 is disposed in the inner space (inside the auxiliary heat insulation tank 37) of the through hole 35B having one end at the refrigerant tank 20 and the other end at the outside of the refrigerant tank 20.
- the refrigerant leaks from the refrigerant tank 20 into the inner circumferential space of the through hole 35B (in the auxiliary heat insulation tank 37), or the low temperature side conductor 41, the refrigerant tank 20, and the through hole 35 are electrically connected.
- FRP low-temperature side conductor 41
- an auxiliary heat insulating tank 37 for holding the inner peripheral space of the through hole 35B in a vacuum state is provided.
- the inner peripheral space of the through hole 35B is included as a part of the auxiliary heat insulation tank 37, and the other part of the auxiliary heat insulation tank 37 is protruded from the surface force of the vacuum heat insulation tank 30 as shown in FIG. It is installed.
- the auxiliary heat insulation tank 37 is made of stainless steel like the vacuum heat insulation tank 30, and the portion where the force of the tank 30 is projected is fixed to the vacuum heat insulation tank 30 by welding.
- a second through hole 35C is provided in the protruding portion so that the room temperature side conductor portion 42 can be inserted.
- the auxiliary heat insulation tank 37 exists on the outer periphery of the fixed room temperature side conductor portion 42 except for a part arranged outside at room temperature.
- a room temperature side sealing portion 31 is provided at the fixed portion of the room temperature side conductor portion 42 for the purpose of maintaining the vacuum state of the vacuum heat insulation tank 30 as in the first and second embodiments.
- the normal temperature side conductor portion 42 and the low temperature side conductor portion 41 are not connected, the normal temperature side conductor portion 42 is not fixed to the vacuum heat insulating tank 30 as in the second embodiment, and is placed outside the tank 30. . this At this time, the second through hole 35C is closed with a lid (not shown) formed of Veg FRP or the like that maintains the vacuum state of the vacuum heat insulating tank 30.
- the power extraction structure of the present invention having the above-described configuration is such that the normal-temperature side conductor portion 42 is inserted into the through-hole 35B and the second through-hole 35C and connected to the low-temperature side conductor portion 41, whereby the extraction conductor When the portion 40 becomes conductive and the room temperature side conductor portion 42 is detached from the low temperature side conductor portion 41, the lead conductor portion 40 becomes nonconductive. Therefore, like the first and second embodiments, the power drawing structure of the present invention can easily change the conductor cross-sectional area as required, and can prevent excessive heat penetration.
- auxiliary heat insulation tank in addition to the vacuum heat insulation tank, it is only necessary to redo only the vacuum insulation of the auxiliary heat insulation tank that breaks the vacuum when the lead conductor part is attached or detached.
- the vessel can remain vacuumed.
- the size of the auxiliary heat insulation tank is appropriately changed according to the size and length of the lead conductor part.For example, when the normal temperature side conductor part 42 is short, the length of the auxiliary heat insulation tank 37 (in FIG. As shown in Fig.
- the length that protrudes from the vacuum insulation tank 30 should be shortened. If the conductor part 42 on the normal temperature side is long, the length of the auxiliary insulation tank 37 (in Fig. 4, the vacuum insulation tank 30 force) The projecting length) should be long as shown in Fig. 4 (B).
- FIG. 7 shows the case of a DC transmission line.
- a line using a three-core superconducting cable shown in FIG. 7 was used. That is, the superconducting cable 100 in which the three-core cable core 102 is housed in the heat insulating tube 101 is used.
- Each core 102 has a former 200, a first superconducting layer 201, an electrical insulating layer 202, a second superconducting layer 203, and a protective layer 204 in order of central force.
- the first superconducting layer 201 and the second superconducting layer 203 are And a superconducting material such as bismuth oxide.
- the heat insulating tube 101 has a double structure that also has a force with the outer tube 101a and the inner tube 101b, both of which are made of a stainless corrugated tube. Between the pipes 101a and 101b, there is provided a heat insulating layer that is evacuated to a predetermined degree of vacuum and also has a heat insulating material force such as super insulation (trade name).
- the space 103 in the inner pipe 101b is a refrigerant flow path through which a refrigerant such as liquid nitrogen that cools the first superconducting layer 201 and the second superconducting layer 203 is circulated.
- An anticorrosion layer 104 is provided on the outer periphery of the heat insulating tube 101.
- FIGS. 5 (A) and 5 (B) the force shown only for the two-core cable core 102 is actually three.
- a terminal structure as shown in FIG. 5 (A) and FIG. 5 (B) is formed at the terminal portion of a cable line using such a superconducting cable 100.
- This terminal structure is composed of an end portion of a superconducting cable 100 and a termination connection box 50 that accommodates the end portion of the cable.
- the terminal junction box 50 includes terminal refrigerant tanks 51 and 52 in which the end portions of the respective cores 102 are accommodated, and a terminal vacuum heat insulating tank 53 disposed so as to cover the outer periphery of the terminal refrigerant tanks 51 and 52.
- each core 102 are stripped to expose the first superconducting layer 201 and the second superconducting layer 203, and are introduced into the terminal refrigerant tanks 51 and 52, respectively.
- the first superconducting layer 201 is connected to a pushing 60 containing a lead 61 made of a conductive material such as copper.
- a soot pipe 62 is arranged on the normal temperature side of the pushing 60.
- an epoxy unit 63 is disposed on the outer periphery of a portion disposed in the vicinity between the terminal refrigerant tank 51 and the terminal refrigerant tank 52.
- connection conductor made of a normal conductive material such as copper may be connected to the first superconducting layer 201, and this connection conductor may be introduced into the terminal refrigerant tank 51 and connected to the lead portion 61 of the pushing 60.
- the configuration so far is the same as the conventional one.
- the feature of this example is that the second superconducting layer 203 is provided with the lead conductor portion 40 having the above-described divided structure.
- the lead conductor portion 40 is disposed in the short-circuit portion 70 to which the second superconducting layer 203 of the three-core core is connected.
- FIG. 5 (A) and FIG. 5 (B) one force indicating two lead conductor portions may be used, or three You may have more than one.
- this superconducting cable line is used as a three-phase AC line
- the first superconducting layer 201 of each core 102 is used as a superconducting conductor
- the second superconducting layer 203 is used as a superconducting shield layer.
- the second superconducting layer 203 needs to have a voltage to ground. Therefore, as shown in FIG. 5 (A), the low-temperature side conductor 41 and the normal-temperature side conductor 42 of the lead conductor 40 are connected by an amount necessary for taking the ground voltage, and the unnecessary lead conductor 40 2 is connected.
- the low temperature side conductor part 41 and the normal temperature side conductor part 42 are separated.
- a ground wire 44 is connected to the room temperature side conductor portion 42 of the connected lead conductor portion 40 to be grounded. Further, in AC power transmission, it is preferable that only the terminal structure at one end of the line is grounded, and the lead conductor portion 40 provided in the other terminal structure is separated and kept in a non-conductive state.
- the first superconducting layer 201 of one core is forwarded.
- the second superconducting layer 203 of the core is used as a return path and the remaining two cores are used as spare lines.
- the second superconducting layer 203 used as a return path flows a current having the same magnitude as the first superconducting layer 201 used as an outbound path. That is, the current flowing through the second superconducting layer 203 is larger than in the case of AC power transmission shown in FIG. Therefore, as shown in Fig.
- the low temperature of one of the lead conductor portions 40 should ensure the conductor cross-sectional area necessary for the ground voltage.
- the side conductor portion 41 and the normal temperature side conductor portion 42 may be connected to be in a conductive state, and the other may be disconnected to be in a non-conductive state. In other words, one of the lead conductors that has been made conductive in direct current power transmission is removed to make it non-conductive.
- the drawer structure of the present invention it is possible to easily change from direct current power transmission to alternating current power transmission, or from alternating current power transmission to direct current power transmission. Also, the low temperature side conductor and the room temperature side conductor of the unnecessary lead conductor are separated from each other. It is possible to prevent the heat intrusion through.
- the first superconducting layer 201 of one core is used as a positive line
- the first superconducting layer 201 of the other core is used as a negative line
- the second superconducting layer 203 of these two cores is used as a neutral line
- the rest can be used as spare lines.
- an unbalanced current flows through the second superconducting layer 203. Therefore, it is advisable to attach and detach the lead conductor so that the conductor cross-sectional area required for the unbalance current is obtained.
- the lead conductor portion may be provided only in the first superconducting layer, or the first superconducting layer and the second superconducting layer may be provided.
- a lead conductor portion may be provided on both of the superconducting layers.
- an AC power transmission line can be used to secure the desired conductor cross-sectional area by attaching and detaching the lead conductor according to the increase or decrease in required power. it can.
- the lead conductor portion is provided on both the first and second superconducting layers, for example, a DC transmission line is used, and the lead conductor portion and the second superconductor layer connected to the first superconducting layer according to the increase or decrease in required power.
- a desired conductor cross-sectional area can be secured by attaching and detaching the lead conductor connected to the superconducting layer.
- the terminal structure of the superconducting cable line has been described.
- the lead conductor portion shown in Examples 1 to 3 is used as the first superconducting layer or the second superconducting member at any location in the line. It may be configured to connect to the layer and draw power at any part of the track.
- FIG. 6 is a schematic configuration diagram of a superconducting transformer having the power drawing structure of the present invention.
- the superconducting transformer includes a superconducting part 10 (superconducting coil), a refrigerant tank 20 in which the superconducting part 10 is accommodated, and a vacuum heat insulating tank 30 arranged so as to cover the outer periphery of the refrigerant tank 20, and in the superconducting coil,
- Each portion where power is input and output between the low temperature side and the normal temperature side includes the lead conductor portion 40 shown in the first embodiment.
- the superconductivity can be adjusted by adjusting the connection state of the lead conductor 40.
- the cross-sectional area of the conductor can be changed according to the current supplied to the coil and the current drawn from the superconducting coil.
- the low-temperature side conductor portion and the room temperature-side conductor portion of the unnecessary lead conductor portion are separated from each other, it is possible to prevent heat from entering through the separated lead conductor portion.
- two lead conductors are provided on the side where power is supplied from the normal temperature side to the low temperature side, and on the side where power is supplied from the low temperature side to the normal temperature side. (Examples with lead conductors) have been explained, but there may be only one on each side (two on each side in total), or three or more lead conductors on one side (total of six or more on both sides).
- the power extraction structure of the present invention is preferably formed at a location where power is transferred between the low temperature side and the normal temperature side in the superconducting device.
- Applicable superconducting equipment includes superconducting cables, superconducting power storage devices, superconducting fault current limiters, and superconducting transformers.
- the power drawing structure of the present invention may be formed as a terminal structure in a superconducting cable line for direct current power transmission or alternating current power transmission, or may be provided at an arbitrary position in the middle of the line.
- the superconducting cable line of the present invention having such a power drawing structure can be easily changed from an AC power transmission line to a DC power transmission line and from a DC power transmission line to an AC power transmission line. It is also possible to easily cope with changes in transmission / distribution routes and required power.
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Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05800327A EP1830445A1 (en) | 2004-12-21 | 2005-11-04 | Power lead-out structure of superconducting apparatus |
US11/631,219 US20090197769A1 (en) | 2004-12-21 | 2005-11-04 | Electric power feed structure for superconducting apparatus |
CA002575266A CA2575266A1 (en) | 2004-12-21 | 2005-11-04 | Power lead-out structure of superconducting apparatus |
MX2007000858A MX2007000858A (es) | 2004-12-21 | 2005-11-04 | Estructura de alimentacion de energia electrica para el aparato de superconduccion. |
NO20065813A NO20065813L (no) | 2004-12-21 | 2006-12-15 | Elektrisk kraftmatingstruktur for superledende apparat |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004-369149 | 2004-12-21 | ||
JP2004369149A JP2006180588A (ja) | 2004-12-21 | 2004-12-21 | 超電導機器の電力引き出し構造 |
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WO2006067915A1 true WO2006067915A1 (ja) | 2006-06-29 |
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PCT/JP2005/020292 WO2006067915A1 (ja) | 2004-12-21 | 2005-11-04 | 超電導機器の電力引き出し構造 |
Country Status (11)
Country | Link |
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US (1) | US20090197769A1 (ja) |
EP (1) | EP1830445A1 (ja) |
JP (1) | JP2006180588A (ja) |
KR (1) | KR20070086466A (ja) |
CN (1) | CN101019291A (ja) |
CA (1) | CA2575266A1 (ja) |
MX (1) | MX2007000858A (ja) |
NO (1) | NO20065813L (ja) |
RU (1) | RU2007102065A (ja) |
TW (1) | TW200631037A (ja) |
WO (1) | WO2006067915A1 (ja) |
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US20100148894A1 (en) * | 2008-12-17 | 2010-06-17 | Aisin Seiki Kabushiki Kaisha | Superconducting apparatus |
JP2013150545A (ja) * | 2007-03-21 | 2013-08-01 | Nkt Cables Ultera As | 終端装置 |
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KR100892561B1 (ko) * | 2008-01-25 | 2009-04-09 | 엘에스전선 주식회사 | 한류기 내장형 초전도 케이블용 단말장치 |
FR2929454B1 (fr) * | 2008-03-26 | 2012-05-04 | Nexans | Dispositif de connexion de deux cables supraconducteurs |
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JP5454892B2 (ja) * | 2009-12-04 | 2014-03-26 | 住友電気工業株式会社 | 常電導導体の引出構造 |
KR101598230B1 (ko) * | 2010-01-21 | 2016-02-29 | 엘에스전선 주식회사 | 초전도 케이블 단말장치의 온도구배부 구조체 |
KR20110086241A (ko) * | 2010-01-22 | 2011-07-28 | 엘에스전선 주식회사 | 초전도 케이블용 단말장치의 차폐도체 연결구조체 |
KR20110097023A (ko) * | 2010-02-24 | 2011-08-31 | 엘에스전선 주식회사 | 알루미늄계 단열관을 구비한 초전도 케이블 |
JP5780626B2 (ja) * | 2010-09-07 | 2015-09-16 | 学校法人中部大学 | 超伝導送電システム |
JP5959062B2 (ja) * | 2010-10-14 | 2016-08-02 | 学校法人中部大学 | 電流リード装置 |
US8530390B2 (en) * | 2010-12-07 | 2013-09-10 | Florida State University Research Foundation | Mechanical decoupling in high-temperature superconducting tapes |
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KR101247263B1 (ko) | 2011-11-14 | 2013-03-25 | 삼성전자주식회사 | 탈부착형 전류 도입선 유닛 및 이를 채용한 초전도 자석 장치 |
KR101883506B1 (ko) * | 2012-04-05 | 2018-07-31 | 한국전력공사 | 단열 스페이서가 구비되는 초전도 전력기기 |
CN106159626B (zh) * | 2015-04-07 | 2018-09-28 | 核工业西南物理研究院 | 滑动式电接头结构及其制造装配方法 |
DE102016215598A1 (de) * | 2016-08-19 | 2018-02-22 | Siemens Aktiengesellschaft | Elektroenergieübertragungseinrichtung sowie Lebenszyklusmanagement |
US10453592B1 (en) * | 2018-05-07 | 2019-10-22 | Microsoft Technology Licensing Llc | Reducing losses in superconducting cables |
CN109088426B (zh) * | 2018-05-16 | 2021-09-14 | 武汉大学 | 一种基于无线网络的微网协调控制系统及方法 |
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US5623240A (en) * | 1992-10-20 | 1997-04-22 | Sumitomo Heavy Industries, Ltd. | Compact superconducting magnet system free from liquid helium |
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JP4609121B2 (ja) * | 2004-07-29 | 2011-01-12 | 住友電気工業株式会社 | 超電導ケーブル線路 |
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2004
- 2004-12-21 JP JP2004369149A patent/JP2006180588A/ja active Pending
-
2005
- 2005-11-04 MX MX2007000858A patent/MX2007000858A/es not_active Application Discontinuation
- 2005-11-04 RU RU2007102065/09A patent/RU2007102065A/ru not_active Application Discontinuation
- 2005-11-04 US US11/631,219 patent/US20090197769A1/en not_active Abandoned
- 2005-11-04 WO PCT/JP2005/020292 patent/WO2006067915A1/ja active Application Filing
- 2005-11-04 KR KR1020077013985A patent/KR20070086466A/ko not_active Application Discontinuation
- 2005-11-04 CN CNA2005800261053A patent/CN101019291A/zh active Pending
- 2005-11-04 CA CA002575266A patent/CA2575266A1/en not_active Abandoned
- 2005-11-04 EP EP05800327A patent/EP1830445A1/en not_active Withdrawn
- 2005-12-20 TW TW094145181A patent/TW200631037A/zh unknown
-
2006
- 2006-12-15 NO NO20065813A patent/NO20065813L/no unknown
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JPH02239605A (ja) * | 1989-03-14 | 1990-09-21 | Sumitomo Heavy Ind Ltd | クライオスタット |
JP2004139857A (ja) * | 2002-10-18 | 2004-05-13 | Sumitomo Electric Ind Ltd | コネクタ |
JP2004265715A (ja) * | 2003-02-28 | 2004-09-24 | Sumitomo Electric Ind Ltd | 直流用超電導ケーブルの端末構造 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013150545A (ja) * | 2007-03-21 | 2013-08-01 | Nkt Cables Ultera As | 終端装置 |
US9331468B2 (en) | 2007-03-21 | 2016-05-03 | Nkt Cables Ultera A/S | Termination unit |
US20100148894A1 (en) * | 2008-12-17 | 2010-06-17 | Aisin Seiki Kabushiki Kaisha | Superconducting apparatus |
US8283821B2 (en) * | 2008-12-17 | 2012-10-09 | Aisin Seiki Kabushiki Kaisha | Superconducting apparatus |
Also Published As
Publication number | Publication date |
---|---|
MX2007000858A (es) | 2007-04-18 |
CN101019291A (zh) | 2007-08-15 |
NO20065813L (no) | 2007-07-23 |
RU2007102065A (ru) | 2008-07-27 |
CA2575266A1 (en) | 2006-06-29 |
JP2006180588A (ja) | 2006-07-06 |
TW200631037A (en) | 2006-09-01 |
KR20070086466A (ko) | 2007-08-27 |
US20090197769A1 (en) | 2009-08-06 |
EP1830445A1 (en) | 2007-09-05 |
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