JP4947434B2 - Superconducting conductor - Google Patents

Superconducting conductor Download PDF

Info

Publication number
JP4947434B2
JP4947434B2 JP2008020102A JP2008020102A JP4947434B2 JP 4947434 B2 JP4947434 B2 JP 4947434B2 JP 2008020102 A JP2008020102 A JP 2008020102A JP 2008020102 A JP2008020102 A JP 2008020102A JP 4947434 B2 JP4947434 B2 JP 4947434B2
Authority
JP
Japan
Prior art keywords
superconducting
layer
metal
current
wire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2008020102A
Other languages
Japanese (ja)
Other versions
JP2008124042A (en
Inventor
俊和 柴田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP2008020102A priority Critical patent/JP4947434B2/en
Publication of JP2008124042A publication Critical patent/JP2008124042A/en
Application granted granted Critical
Publication of JP4947434B2 publication Critical patent/JP4947434B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • 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

Description

本発明は超電導導体に関するもので、特に短絡時に短絡電流の電路を確保できる超電導導体の構造に関するものである。   The present invention relates to a superconducting conductor, and more particularly to a structure of a superconducting conductor capable of ensuring a short-circuit current path when a short circuit occurs.

従来の超電導ケーブルの構造としては、特開平5-28847号公報記載のものが知られている。これは冷媒流路となる芯材（フォーマ）の外周に超電導線材を螺旋状に複数層巻回したものである。通常、この超電導線材はセラミックス系超電導材料を金属（銀など）で被覆して形成されている。各層における超電導線材の巻回方向は交互に逆になっており、右巻き層と左巻き層の数はほぼ同数にされている。
特開平５−２８８４７号公報 特開平４−２２０１１号公報 特開平１−１０２８１１号公報 特開平７−１２２１３３号公報 特開平６−３２５６３１号公報 As a structure of a conventional superconducting cable, a structure described in Japanese Patent Laid-Open No. 5-28847 is known. This is a superconducting wire spirally wound around the outer periphery of a core material (former) serving as a refrigerant flow path. Normally, this superconducting wire is formed by coating a ceramic superconducting material with a metal (such as silver). The winding direction of the superconducting wire in each layer is alternately reversed, and the number of right-handed layers and left-handed layers is substantially the same.
Japanese Patent Laid-Open No. 5-28847 JP-A-4-22011 Japanese Patent Laid-Open No. 1-102811 JP-A-7-122133 JP-A-6-325631

しかし、上記の超電導ケーブルでは短絡事故が発生した場合に短絡電流の電路が十分確保できないために短絡電流を許容できないという問題がある。超電導導体は臨界電流以下では高い電流密度で通電が可能で、導体断面積は小さくされている。このような超電導導体に短絡事故などで大電流（６６ｋｖ系統で数１０ｋＡ）が流れると臨界電流を超え、導体に抵抗が発生する。このとき、電流は安定化材である銀にも分流するが、導体断面積が小さいため導体抵抗が高く、かつ熱容量が小さいために温度上昇が大きくなる。また、過電流はフォーマにも分流するが、フォーマは導体の内側に位置するためインダクタンスが導体より大きくなり、分流する割合は小さい。   However, the above-described superconducting cable has a problem that when a short-circuit accident occurs, a short-circuit current cannot be allowed because a short-circuit current circuit cannot be sufficiently secured. The superconducting conductor can be energized at a high current density below the critical current, and the conductor cross-sectional area is reduced. When a large current (several tens of kA in the 66 kv system) flows in such a superconducting conductor due to a short circuit accident or the like, the critical current is exceeded and resistance is generated in the conductor. At this time, the current is also shunted to silver which is a stabilizing material, but since the conductor cross-sectional area is small, the conductor resistance is high and the heat capacity is small, so the temperature rise is large. The overcurrent is also diverted to the former, but since the former is located inside the conductor, the inductance is larger than that of the conductor, and the proportion of the diversion is small.

本発明は短絡電流の電路を確保できる超電導導体を提供することを主目的とするもので、その特徴は、超電導層の外周に短絡電流を流すための金属層を具え、これら超電導層と金属層とを交互に積層し、前記超電導層と金属層との間が絶縁されていることにある。   The main object of the present invention is to provide a superconducting conductor capable of securing a short-circuit current path. The feature of the present invention is to provide a metal layer for allowing a short-circuit current to flow around the outer periphery of the superconducting layer. And the superconducting layer and the metal layer are insulated from each other.

ここで、金属層は超電導層の外周に金属パイプをはめ込んだり、金属テープ（線）を巻回して構成することが挙げられる。金属層の材質としては銅やアルミが適切である。金属層を金属パイプとした場合、コルゲートパイプとしてもよい。金属層を金属テープで構成した場合、積層して巻回される各金属テープ層の間を絶縁することが好ましい。この絶縁を行うには、エナメル，マイラー紙，カプトンテープなどの絶縁テープを金属テープの層間に挿入することが挙げられる。   Here, the metal layer may be configured by fitting a metal pipe around the outer periphery of the superconducting layer or winding a metal tape (wire). Suitable materials for the metal layer are copper and aluminum. When the metal layer is a metal pipe, it may be a corrugated pipe. When a metal layer is comprised with a metal tape, it is preferable to insulate between each metal tape layer laminated | stacked and wound. For this insulation, an insulating tape such as enamel, Mylar paper, or Kapton tape is inserted between the layers of the metal tape.

また、超電導層と金属層とは交互に積層することが望ましい。その場合、超電導層は超電導線材を螺旋状に巻回し、金属層は金属テープを螺旋状に巻回して、隣接する超電導層と金属層とを１組としたとき、１組内の超電導層と金属層とは巻回方向が同じで、隣接する組同士は巻回方向を逆にすることが好適である。   Further, it is desirable that the superconducting layer and the metal layer are alternately laminated. In that case, when the superconducting layer is formed by spirally winding a superconducting wire, the metal layer is wound by winding a metal tape, and the adjacent superconducting layer and metal layer are combined into one set, the superconducting layer in one set It is preferable that the winding direction is the same as that of the metal layer, and the adjacent sets are reversed in the winding direction.

以上の構成により、定格運転時は電流の大半を超電導層に流して発熱ロスを極小化し、短絡事故時には電流を超電導層以外（主に金属層）に分流させて発熱を最小限にすることができる。   With the above configuration, most of the current flows through the superconducting layer during rated operation to minimize heat loss, and in the event of a short-circuit accident, current can be shunted to other than the superconducting layer (mainly metal layer) to minimize heat generation. it can.

特に、積層して巻回される金属テープで金属層を構成し、各金属テープ層の間を絶縁すれば、短絡電流のパスを螺旋状として短絡電流用の導体のインダクタンスを大きくすると共に、金属テープ層間の渦電流パスを切断してロスをより小さくすることができる。   In particular, if a metal layer is composed of metal tapes that are stacked and wound, and each metal tape layer is insulated, the short-circuit current path is spiraled to increase the inductance of the short-circuit current conductor, and the metal The loss can be reduced by cutting the eddy current path between the tape layers.

本発明超電導導体によれば、超電導層に金属層を複合することで、定格運転時は電流の大半を超電導層に流し、短絡事故時は短絡電流の大半を金属層に流すことができ、短絡電流を許容することができる。また、超電導層と金属層との間を絶縁することで、層間を流れる渦電流のパスを遮断でき、発熱ロスを低減できる。   According to the superconducting conductor of the present invention, by superimposing a metal layer on the superconducting layer, most of the current can flow through the superconducting layer during rated operation, and most of the short-circuit current can flow through the metal layer during a short circuit accident. Current can be tolerated. Further, by insulating between the superconducting layer and the metal layer, the path of eddy current flowing between the layers can be cut off, and the heat loss can be reduced.

ここで、金属層を金属テープの巻回により構成すると、金属層のインダクタンスを大きくし、定格時の金属層のインピーダンスを超電導層のそれよりも大きくすることができ、定格時の電流の大半を確実に超電導層に流すことができる。   Here, when the metal layer is formed by winding a metal tape, the inductance of the metal layer can be increased, the impedance of the metal layer at the time of rating can be made larger than that of the superconducting layer, and most of the current at the time of rating can be obtained. It can surely flow through the superconducting layer.

また、金属テープの層間に絶縁テープを挿入することで、各金属テープ層間の渦電流のパスを遮断し、発熱を低減することができる。   Further, by inserting an insulating tape between the metal tape layers, an eddy current path between the metal tape layers can be cut off and heat generation can be reduced.

さらに、超電導線材と金属線（テープ）を交互に螺旋状に巻回し、隣接する超電導層と金属層とを１組としたとき、１組内の超電導層と金属層とは巻回方向が同じで、隣接する組同士は巻回方向を逆にすることで、自己の磁場を相殺することができる。   Further, when the superconducting wire and the metal wire (tape) are alternately wound in a spiral shape and the adjacent superconducting layer and the metal layer are made into one set, the superconducting layer and the metal layer in one set have the same winding direction. Thus, adjacent groups can reverse their winding directions to cancel their magnetic fields.

以下、本発明の実施の形態を説明する。   Embodiments of the present invention will be described below.

（実施例１）
図１に本発明超電導導体の概略図を示す。この超電導導体は中心から順にフォーマ１，超電導層２，短絡電流用の金属パイプ３，電気絶縁層４を具えている。 Example 1
FIG. 1 shows a schematic view of the superconducting conductor of the present invention. This superconducting conductor comprises a former 1, a superconducting layer 2, a metal pipe 3 for a short circuit current 3, and an electric insulating layer 4 in this order from the center.

フォーマ１は液体窒素などの冷媒流路となる中空の金属管で、丸パイプ状のものの他、波付け加工されたパイプを用いることもできる。フォーマ１の材質としてはアルミニウム合金などが挙げられる。   The former 1 is a hollow metal pipe serving as a refrigerant flow path for liquid nitrogen or the like, and a round pipe-shaped pipe or a corrugated pipe can be used. Examples of the material of the former 1 include an aluminum alloy.

超電導層２はこのフォーマ１の上に超電導線材を螺旋状に巻回して構成されている。本例では超電導線材を２層積層して巻回し、各層の巻回方向を逆にした。各層の巻回方向を逆にすることで、各層の超電導線材で発生する磁場は方向が逆になって相殺されるため、自己磁場によって超電導特性が低下すること抑制できる。ここで用いる超電導線材は、超電導材料を金属で被覆して線状に形成したもの等が適切である。この超電導材料としてはY-Ba-Cu-O系、Bi-(Pb)-Sr-Ca-Cu-O系、Tl-Ba-Ca-Cu-O系などのセラミックス系材料が挙げられる。超電導材料を金属で被覆するには、金属製パイプ内に超電導材料を充填し、所定の断面積、断面形状に成形した後、所定の熱処理を施すこと等により製作する。超電導線材の被覆金属には、導電性に優れた材料、例えばＡｇ（合金），Ｃｕ（合金）などが好適である。なお、超電導線材の積層数は特に限定されない。   The superconducting layer 2 is constructed by spirally winding a superconducting wire on the former 1. In this example, two layers of superconducting wires were laminated and wound, and the winding direction of each layer was reversed. By reversing the winding direction of each layer, the magnetic field generated in the superconducting wire of each layer is reversed and canceled out, so that the superconducting characteristics can be prevented from being deteriorated by the self-magnetic field. As the superconducting wire used here, a superconducting material coated with metal and formed into a linear shape or the like is appropriate. Examples of the superconducting material include ceramic materials such as Y-Ba-Cu-O, Bi- (Pb) -Sr-Ca-Cu-O, and Tl-Ba-Ca-Cu-O. In order to coat the superconducting material with a metal, the metal pipe is filled with the superconducting material, formed into a predetermined cross-sectional area and cross-sectional shape, and then subjected to a predetermined heat treatment. A material excellent in conductivity, for example, Ag (alloy), Cu (alloy), or the like is suitable for the coating metal of the superconducting wire. The number of superconducting wires stacked is not particularly limited.

この超電導層２の上に配置されている金属パイプ３が短絡電流の流路となる。すなわち、定格運転時は超電導層２に電流の大半が流れ、短絡事故時にはこの金属パイプ３に最も多く電流が流れるようにしている。そして、この金属パイプ３を超電導層２の上に配置する際、金属パイプ３と超電導層２の間を絶縁すればよい。   The metal pipe 3 disposed on the superconducting layer 2 serves as a short-circuit current flow path. That is, most of the current flows through the superconducting layer 2 during rated operation, and most current flows through the metal pipe 3 during a short circuit accident. Then, when the metal pipe 3 is disposed on the superconducting layer 2, the metal pipe 3 and the superconducting layer 2 may be insulated.

一般に、金属に電流を流すと表皮効果が生じ、導体の外側の方が内側と比較して電流密度が大きくなる。これは、円筒形状を考えると外側の方がインダクタンスが小さいためである。フォーマ(1)、超電導層(2)、金属パイプ(3)の各部の抵抗Ｒ，インダクタンスＬ，インピーダンス（√｛（ωＬ）2 ＋Ｒ2 ｝）は次の表１のような関係になる。

Figure 0004947434
In general, when a current is passed through a metal, a skin effect occurs, and the current density on the outer side of the conductor is larger than that on the inner side. This is because the inductance is smaller on the outer side when the cylindrical shape is considered. The resistance R, inductance L, and impedance (√ {(ωL) 2 + R 2 }) of each part of the former (1), the superconducting layer (2), and the metal pipe (3) are as shown in Table 1 below.
Figure 0004947434

インダクタンスは形状で決定されるのに対し、抵抗は超電導層２が超電導状態か常電導状態かによって大きく異なる。電流の各部への分流はインピーダンスにより決定される。従って、上記のような関係になれば、定格運転時は超電導層２に電流の大半が流れ、短絡事故時には金属パイプ３に最も多く電流が流れるようになる。   While the inductance is determined by the shape, the resistance varies greatly depending on whether the superconducting layer 2 is in a superconducting state or a normal conducting state. The shunt current to each part is determined by the impedance. Therefore, if it becomes the above relations, most current will flow into the superconducting layer 2 at the time of rated operation, and most current will flow into the metal pipe 3 at the time of a short circuit accident.

なお、電気絶縁層４はクラフト紙とポリプロピレンなどのポリオレフィン系樹脂を一体化したいわゆるＰＰＬＰ等を巻回したものが利用できる。   The electrical insulating layer 4 can be made by winding a so-called PPLP in which kraft paper and a polyolefin resin such as polypropylene are integrated.

（実施例２)
上記の実施例１でも短絡電流の流路を確保することができるが、「短絡電流／定格電流」の比率が大きな場合、金属パイプ３の断面積を大きくする必要がある。そのとき、抵抗ＲだけでなくインダクタンスＬも小さくなるため、インピーダンス（√｛（ωＬ）2＋Ｒ2｝）が超電導層２より金属パイプ３の方が小さくなることがある。この場合、定格時においても短絡時と同様に電流が金属パイプ３に最も多く流れるため、金属パイプ３のジュール発熱が大きくなり好ましくない。 (Example 2)
Although the short-circuit current channel can also be secured in the first embodiment, when the ratio of “short-circuit current / rated current” is large, the cross-sectional area of the metal pipe 3 needs to be increased. At that time, since not only the resistance R but also the inductance L is reduced, the impedance (√ {(ωL) 2 + R 2 }) may be smaller in the metal pipe 3 than in the superconducting layer 2. In this case, since the most current flows through the metal pipe 3 at the time of rating as in the case of a short circuit, the Joule heat generation of the metal pipe 3 increases, which is not preferable.

そこで、「短絡電流／定格電流」の比率が大きいときは、図２に示すように、前記金属パイプ３を金属テープ５に置き換えて構成する。すなわち、超電導層２の上に金属テープ５を螺旋状に巻回し、短絡電流の流路を直線状から螺旋状とする。これにより、金属テープ層のインダクタンスを大きくし、定格時のインピーダンスを超電導層２より大きくして、定格時の電流の大半を超電導層２に流すことができる。なお、フォーマ１，超電導層２，電気絶縁層４の構成は実施例１と同様なので説明を省略する。   Therefore, when the ratio of “short circuit current / rated current” is large, the metal pipe 3 is replaced with a metal tape 5 as shown in FIG. That is, the metal tape 5 is spirally wound on the superconducting layer 2, and the flow path of the short circuit current is changed from a straight line to a spiral. Thereby, the inductance of the metal tape layer can be increased, the impedance at the time of rating can be made larger than that of the superconducting layer 2, and most of the current at the time of rating can be passed through the superconducting layer 2. Since the configuration of the former 1, the superconducting layer 2, and the electrical insulating layer 4 is the same as that of the first embodiment, description thereof is omitted.

金属テープ層の抵抗は巻回数により調整でき、インダクタンスは巻回方向によって調整ができる。なお、電流が流れることによって発生する磁場により金属テープ層に渦電流が発生する。この渦電流を低減するには、積層して巻回した金属テープの層間にマイラー紙などの絶縁テープを挿入することで層間の渦電流のパス遮断すればよい。   The resistance of the metal tape layer can be adjusted by the number of windings, and the inductance can be adjusted by the winding direction. Note that an eddy current is generated in the metal tape layer by a magnetic field generated by the flow of current. In order to reduce this eddy current, an insulating tape such as Mylar paper may be inserted between the layers of the metal tapes laminated and wound to block the eddy current path between the layers.

（実施例３）
さらに、上記実施例１，２とは別構成の超電導導体の構造を図３に示す。この超電導導体はフォーマ１の外周に超電導線材２と金属線６とを交互に螺旋状に巻回し、その上に電気絶縁層４を形成している。ここで、隣接する超電導線材２と金属線６とを１組としたとき、１組内の超電導線材２と金属線６とは巻回方向が同じで、隣接する組み同士は巻回方向が逆になっている。このような構成により、各組における超電導線材[1]と金属線[6]の抵抗Ｒ、インダクタンスＬ、インピーダンス（√｛（ωＬ）2＋Ｒ2｝）は次の表２のようになるため、定格時には超電導線材２に、事故時には金属線６に電流を流すことができる。

Figure 0004947434
(Example 3)
Further, FIG. 3 shows the structure of a superconducting conductor having a configuration different from those of the first and second embodiments. In this superconducting conductor, a superconducting wire 2 and a metal wire 6 are alternately wound around the outer periphery of the former 1 in a spiral shape, and an electrical insulating layer 4 is formed thereon. Here, when the adjacent superconducting wire 2 and the metal wire 6 are made into one set, the superconducting wire 2 and the metal wire 6 in one set have the same winding direction, and the adjacent sets have opposite winding directions. It has become. With such a configuration, the resistance R, inductance L, and impedance (√ {(ωL) 2 + R 2 }) of the superconducting wire [1] and the metal wire [6] in each set are as shown in Table 2 below. Current can be passed through the superconducting wire 2 at the time of rating, and through the metal wire 6 at the time of an accident.
Figure 0004947434

また、１組内の超電導線材１と金属線６とは巻回方向を同じとし、隣接する組み同士は巻回方向は逆にすることで、超電導導体全体のインダクタンスＬを小さくすると共に、定格時および事故時のいずれも長手方向に発生する磁場を相殺することができる。これにより、超電導線材２の磁場による臨界電流の低下防止に有効である。   In addition, the superconducting wire 1 and the metal wire 6 in one set have the same winding direction, and the adjacent sets have opposite winding directions, thereby reducing the inductance L of the entire superconducting conductor and The magnetic field generated in the longitudinal direction can be canceled both in the event of an accident. This is effective in preventing a decrease in critical current due to the magnetic field of the superconducting wire 2.

さらに、本構成においても超電導線材２と金属線６との層間に絶縁紙を挿入すれば、層間を流れる渦電流のパスを遮断でき、一層発熱ロスを低減できる。   Furthermore, even in this configuration, if insulating paper is inserted between the layers of the superconducting wire 2 and the metal wire 6, the path of eddy current flowing between the layers can be cut off, and heat loss can be further reduced.

なお、本例もフォーマ１，超電導層２，電気絶縁層４の構成は実施例１と同様である。   In this example, the configurations of the former 1, the superconducting layer 2, and the electrical insulating layer 4 are the same as those in the first embodiment.

本発明は超電導ケーブルなどの超電導導体に好適に利用できる。   The present invention can be suitably used for a superconducting conductor such as a superconducting cable.

金属パイプを用いた本発明超電導導体の説明図である。It is explanatory drawing of this invention superconducting conductor using a metal pipe. 金属テープを用いた本発明超電導導体の説明図である。It is explanatory drawing of this invention superconducting conductor using a metal tape. 超電導線材と金属線とを交互に巻回した本発明超電導導体の説明図である。It is explanatory drawing of this invention superconducting conductor which wound the superconducting wire and the metal wire alternately.

符号の説明Explanation of symbols

１ フォーマ
２ 超電導層（線材）
３ 金属パイプ
４ 電気絶縁層
５ 金属テープ
６ 金属線 1 Former 2 Superconducting layer (wire)
3 Metal pipe 4 Electrical insulation layer 5 Metal tape 6 Metal wire

Claims (3)

超電導層の外周に短絡電流を流すための金属層を具え、
これら超電導層と金属層とが交互に積層され、
前記超電導層と金属層との間が絶縁されていることを特徴とする超電導導体。 A metal layer for flowing a short-circuit current around the outer periphery of the superconducting layer,
These superconducting layers and metal layers are laminated alternately,
A superconducting conductor, wherein the superconducting layer and the metal layer are insulated. 前記金属層は、金属テープが積層して巻回され、各金属テープ層の間が絶縁されていることを特徴とする請求項１に記載の超電導導体。   The superconducting conductor according to claim 1, wherein the metal layer is formed by laminating and winding metal tapes, and the metal tape layers are insulated from each other. 超電導層と金属層の各々は螺旋状に巻回して構成され、
隣接する超電導層と金属層とを１組とし、１組内の超電導層と金属層とは巻回方向が同じで、
隣接する組同士は巻回方向が逆であることを特徴とする請求項1または２記載の超電導導体。 Each of the superconducting layer and the metal layer is formed by spirally winding,
Adjacent superconducting layer and metal layer are one set, and the superconducting layer and metal layer in one set have the same winding direction,
The superconducting conductor according to claim 1 or 2, wherein winding directions of adjacent pairs are opposite to each other.
JP2008020102A 2008-01-31 2008-01-31 Superconducting conductor Expired - Fee Related JP4947434B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008020102A JP4947434B2 (en) 2008-01-31 2008-01-31 Superconducting conductor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008020102A JP4947434B2 (en) 2008-01-31 2008-01-31 Superconducting conductor

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP23563998A Division JP4135184B2 (en) 1998-08-21 1998-08-21 Superconducting conductor

Publications (2)

Publication Number Publication Date
JP2008124042A JP2008124042A (en) 2008-05-29
JP4947434B2 true JP4947434B2 (en) 2012-06-06

Family

ID=39508518

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008020102A Expired - Fee Related JP4947434B2 (en) 2008-01-31 2008-01-31 Superconducting conductor

Country Status (1)

Country Link
JP (1) JP4947434B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2487691A4 (en) * 2009-10-07 2014-10-22 Kyushu Inst Technology Superconductor cable and ac power transmission cable
US8938278B2 (en) * 2011-02-18 2015-01-20 The Regents Of The University Of Colorado Superconducting cables and methods of making the same
CN110415886A (en) * 2019-07-09 2019-11-05 上海交通大学 Hyperconductive cable structure and winding method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01102811A (en) * 1987-10-16 1989-04-20 Hitachi Ltd Superconductive electric wire
JPH0422011A (en) * 1990-05-16 1992-01-27 Electric Power Dev Co Ltd Superconductive conductor
JPH06325631A (en) * 1993-05-14 1994-11-25 Hitachi Ltd Superconducting cable and device using same
JPH07122133A (en) * 1993-10-21 1995-05-12 Sumitomo Electric Ind Ltd Oxide superconductor and manufacture thereof

Also Published As

Publication number Publication date
JP2008124042A (en) 2008-05-29

Similar Documents

Publication Publication Date Title
JP4300517B2 (en) Superconducting cable
JP5064716B2 (en) Superconducting cable
US8112135B2 (en) Superconductive electrical cable
US6988915B2 (en) Terminal structure of direct electric current multilayer structure superconducting cable and DC superconducting cable line
JP5416509B2 (en) Intermediate connection structure of superconducting cable
JP4667644B2 (en) Superconducting cable
JP3691692B2 (en) Superconducting cable
JP2006012776A (en) Superconductive cable
JP4947434B2 (en) Superconducting conductor
JP4967750B2 (en) Superconducting cable connection structure and superconducting cable connection method
WO2007122670A1 (en) Superconducting cable
MX2007011073A (en) Superconductive cable and dc power transmission using the superconductive cable.
JP4135184B2 (en) Superconducting conductor
JP5397994B2 (en) Superconducting cable
JP5385746B2 (en) Superconducting cable
JP5604213B2 (en) Superconducting equipment
JP4716164B2 (en) Superconducting cable
WO2007116519A1 (en) Superconducting cable
JP2018186037A (en) Superconductive cable line
JP3568745B2 (en) Oxide superconducting cable
JP2012174669A (en) Normal temperature insulating type superconducting cable
JP5166144B2 (en) Superconducting cable
JP2011086514A (en) Superconductive cable
JPH1166980A (en) Oxide superconducting cable
JP2010262933A (en) Superconducting cable and magnet using the same

Legal Events

Date Code Title Description
A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110223

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20120210

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20120223

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150316

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees