JP3268659B2 - Superconducting busbar - Google Patents
Superconducting busbarInfo
- Publication number
- JP3268659B2 JP3268659B2 JP26421792A JP26421792A JP3268659B2 JP 3268659 B2 JP3268659 B2 JP 3268659B2 JP 26421792 A JP26421792 A JP 26421792A JP 26421792 A JP26421792 A JP 26421792A JP 3268659 B2 JP3268659 B2 JP 3268659B2
- Authority
- JP
- Japan
- Prior art keywords
- bus bar
- superconducting
- tape
- insulating tape
- superconducting bus
- 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
Links
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
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は超電導ブスバーに関する
もので、超電導ブスバーの構造を複雑化することなく、
電気絶縁性能を飛躍的に向上せしめたものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superconducting bus bar, without complicating the structure of the superconducting bus bar.
This is a significant improvement in electrical insulation performance.
【０００２】[0002]
【従来の技術】従来より、超電導ブスバーの電気絶縁方
法としては、液体ヘリウム含浸のクラフト紙、プラスチ
ックテープ、不織布等が使用されている。これらを用い
た超電導ブスバーとしては大別して図２に示すように、
＋極導体（１）と−極導体（２）の間に電気絶縁層
（３）を設け、これを管（４）内の極低温冷媒の流路
（５）内に収め、その外側に断熱層（６）を設けてさら
にこれを高真空を保持するための管（８）内に配置する
方式と、図３に示すように、単極円形導体（１）又は
（２）を管（４）内の極低温冷媒の流路（５）内に収
め、その外側に電気絶縁体（３）と接地電極（７）を設
け、さらにこれを管（４′）内の極低温冷媒の流路
（５′）内に設置し、その外側に断熱層（６）を設けて
これを高真空を保持する管（８）内に配置する方式の２
通りがある。2. Description of the Related Art Conventionally, kraft paper impregnated with liquid helium, plastic tape, nonwoven fabric, and the like have been used as a method for electrically insulating a superconducting bus bar. As a superconducting bus bar using these, as shown in FIG.
An electric insulating layer (3) is provided between the positive electrode conductor (1) and the negative electrode conductor (2), and this is housed in the flow path (5) of the cryogenic refrigerant in the pipe (4), and the outside is thermally insulated. A method in which a layer (6) is provided and further placed in a tube (8) for maintaining a high vacuum, and as shown in FIG. 3, a monopolar circular conductor (1) or (2) is connected to a tube (4). ) Is placed in the flow path (5) of the cryogenic refrigerant, and an electric insulator (3) and a ground electrode (7) are provided outside the flow path. (5 '), a heat insulating layer (6) is provided on the outside thereof, and this is disposed in a tube (8) for maintaining a high vacuum.
There is a street.
【０００３】[0003]
【発明が解決しようとする課題】これらの超電導ブスバ
ーの電気絶縁性能を向上させようとする場合、上記図２
の前者の方式では両導体間の離隔距離（即ち電気絶縁層
の厚さ）を増やすか、あるいは両導体の沿面距離Ｌを増
やさなければならないが、これは構造上困難であるため
電気絶縁性能の向上は難しい。また上記図３の後者の方
式では電気絶縁層の厚さを増やすことによって電気絶縁
性能を向上させることは容易であるが、他方導体を冷却
するための極低温冷媒の流路（５）とは別に電気絶縁層
の絶縁体を含浸するための極低温冷媒流路（５′）が必
要となり、超電導ブスバーの構造自体が複雑になるとい
う問題がある。In order to improve the electrical insulation performance of these superconducting busbars, the above-mentioned FIG.
In the former method, the distance between the two conductors (that is, the thickness of the electrical insulating layer) must be increased or the creepage distance L between the two conductors must be increased. It is difficult to improve. In the latter method of FIG. 3, it is easy to improve the electric insulation performance by increasing the thickness of the electric insulation layer, but on the other hand, what is the flow path (5) of the cryogenic refrigerant for cooling the conductor? Separately, a cryogenic refrigerant flow path (5 ') for impregnating the insulator of the electric insulating layer is required, and there is a problem that the structure of the superconducting bus bar itself becomes complicated.
【０００４】[0004]
【課題を解決するための手段】本発明はこれに鑑み種々
検討の結果、図３に示す単極導体についての超電導ブス
バーの構造を複雑にすることなく、電気絶縁性能を飛躍
的に向上することができる超電導ブスバーを開発したも
のである。According to the present invention, as a result of various studies, it has been found that the electrical insulation performance can be dramatically improved without complicating the structure of the superconducting bus bar for the single-pole conductor shown in FIG. A superconducting busbar was developed.
【０００５】本発明超電導ブスバーは、中空管の内部を
流れる極低温冷媒内に超電導線を設置し、該中空管の外
側に電気絶縁性テープを重ね巻きし、且つその外側に接
地電極を設け、さらに電気絶縁性テープを高真空下に保
持したことを特徴とするもので、電気絶縁性テープに、
二軸延伸ポリプロピレンテープの両側からクラフト紙を
張り合わせた構造を有する半合成紙、不織布又はクラフ
ト紙を用い、また接地電極を、クラフト紙の片面に金属
箔を接着した金属化紙、エンボス加工した導電性テー
プ、細線をよった編組線又はこれらと螺旋巻きした低抵
抗線の複合構造とするとよい。According to the superconducting bus bar of the present invention, a superconducting wire is installed in a cryogenic refrigerant flowing inside a hollow tube, an electrically insulating tape is wrapped around the outside of the hollow tube, and a ground electrode is provided outside the tube. Provided, and further characterized in that the electrically insulating tape was held under a high vacuum.
Use semi-synthetic paper, non-woven fabric or kraft paper having a structure in which kraft paper is laminated from both sides of a biaxially stretched polypropylene tape, and use a grounded electrode, metalized paper with a metal foil adhered to one side of kraft paper, embossed conductive It is preferable to use a composite structure of a conductive tape, a braided wire made of a thin wire, or a low resistance wire spirally wound therewith.
【０００６】[0006]
【作用】即ち本発明超電導ブスバーは、図１に示すよう
に単極円形導体（１）又は（２）を管（４）内の極低温
冷媒の流路（５）内に設け、その外側に電気絶縁体
（３）と接地電極（７）を設け、更にその外側に断熱層
（６）を形成し、これを高真空保持用の管（８）内に配
置し、電気絶縁体（３）である電気絶縁性テープなどを
高真空下に置いたものである。このように本発明によれ
ば、電気絶縁性テープは高真空下に置かれているので、
電気絶縁性テープを極低温冷媒で含浸させる必要はな
く、従って従来のように電気絶縁性テープに極低温冷媒
を供給するための管を設ける必要もなくなり、超電導ブ
スバーの構造が簡素化できる。According to the superconducting bus bar of the present invention, as shown in FIG. 1, a monopolar circular conductor (1) or (2) is provided in a flow path (5) of a cryogenic refrigerant in a pipe (4), and is provided outside the pipe. An electric insulator (3) and a ground electrode (7) are provided, and a heat insulating layer (6) is further formed outside the electric insulator (3). The heat insulating layer (6) is arranged in a high vacuum holding tube (8). Is placed under a high vacuum. Thus, according to the present invention, since the electrically insulating tape is placed under a high vacuum,
It is not necessary to impregnate the electrically insulating tape with the cryogenic refrigerant, so that there is no need to provide a tube for supplying the cryogenic refrigerant to the electrically insulating tape as in the conventional case, and the structure of the superconducting bus bar can be simplified.
【０００７】更に電気絶縁性テープの巻付けの厚さを増
加させれば電気絶縁性能を厚さの増加とともに容易に向
上させることができる。この厚さを１mmから30mm程度ま
でさまざまな厚さに形成することは容易であり、所望の
電気絶縁性能を有する超電導ブスバーが得られる。Further, if the thickness of the electrically insulating tape is increased, the electrical insulation performance can be easily improved as the thickness increases. It is easy to form this thickness in various thicknesses from about 1 mm to about 30 mm, and a superconducting bus bar having desired electrical insulation performance can be obtained.
【０００８】本発明の電気絶縁構造では電気絶縁性能の
より高い電気絶縁性テープの採用のみならず、真空度を
高くする必要がある。真空度は10-5Torr以上とすること
が望ましく、そのような高真空下では電気絶縁性テープ
の重ね巻きによってテープ間に生じる真空ギャップの電
気絶縁性能も十分高く安定する。In the electric insulating structure of the present invention, it is necessary not only to employ an electric insulating tape having higher electric insulating performance but also to increase the degree of vacuum. The degree of vacuum is desirably 10 -5 Torr or more. Under such a high vacuum, the electrical insulation performance of the vacuum gap generated between the tapes by overlapping winding of the electrically insulating tape is sufficiently high and stable.
【０００９】このような高真空は真空ポンプで容易に得
られるが、電気絶縁性テープ間の多数の真空ギャップを
すべて十分に真空びきするためには、電気絶縁層の工夫
が必要である。そのための方策としては電気絶縁性テー
プや接地電極に使用する材料に通気性の良いものを採用
することが考えられる。Although such a high vacuum can be easily obtained by a vacuum pump, it is necessary to devise an electric insulating layer in order to sufficiently vacuum all the many vacuum gaps between the electric insulating tapes. As a measure for that, it is conceivable to adopt a material having good air permeability as the material used for the electrically insulating tape and the ground electrode.
【００１０】ところで電気絶縁性テープにおいて、通気
性の良さと電気絶縁性能の良さは背反する関係にあるの
が一般的であるが、絶縁性能がクラフト紙よりも優れて
いるプラスチックテープを両側から通気性の良好なクラ
フト紙で接合した構造を有する半合成紙は、通気性の良
さと電気絶縁性の良さを合わせ持った電気絶縁性テープ
であり、本発明の超電導ブスバーの電気絶縁性テーブと
しては半合成紙が最適である。そして半合成紙の中では
プラスチック部分に二軸延伸ポリプロピレンを用いたも
のが電気絶縁性能が最も高い。[0010] By the way, in the electric insulating tape, the good air permeability and the good electric insulating performance are generally in a contradictory relationship, but a plastic tape having an insulating performance better than that of kraft paper is ventilated from both sides. Semi-synthetic paper having a structure bonded with kraft paper having good air permeability is an electrically insulating tape having both good air permeability and good electrical insulation, and is used as an electrically insulating tape of the superconducting bus bar of the present invention. Semi-synthetic paper is best. Among the semi-synthetic papers, those using biaxially oriented polypropylene for the plastic portion have the highest electrical insulation performance.
【００１１】[0011]
【実施例】以下本発明を実施例について説明する。図１
に示すように＋極導体（１）又は−極導体（２）を収め
た外径50mmの極低温冷媒管（４）の外周に、厚さ 150μ
m の二軸延伸ポリプロピレンラミネート半合成紙を 1/2
ラップで８層重ね巻きして、厚さ 1.2mmの電気絶縁層
（３）を形成し、その外側に厚さ 150μm の金属化紙を
1/2 ラップで１層巻き付けて接地電極（７）とし、その
外側に断熱層（６）を形成して超電導ブスバーとした。
これを真空保持する管（８）内に収め次の実験を行っ
た。The present invention will be described below with reference to examples. FIG.
As shown in the figure, the outer circumference of the cryogenic refrigerant tube (4) having an outer diameter of 50 mm and containing the positive electrode conductor (1) or the negative electrode conductor (2) has a thickness of 150 μm.
m biaxially oriented polypropylene laminated semi-synthetic paper
Eight layers are wrapped in a wrap to form a 1.2 mm thick electrically insulating layer (3), and a 150 μm thick metallized paper is coated on the outside.
One layer was wound with 1/2 wrap to form a ground electrode (7), and a heat insulating layer (6) was formed on the outside thereof to form a superconducting bus bar.
This was placed in a tube (8) holding a vacuum, and the next experiment was performed.
【００１２】電気絶縁層を10-5Torrの真空下に置き、極
低温冷媒管を高圧電極とし、接地電極を接地して負極性
直流電圧を１kV／分の割合で印加し昇圧したところ、20
kVで絶縁破壊した。破壊は半合成紙の貫通破壊ではな
く、半合成紙間の真空ギャップを伝わって生じた。上記
と同様にして電気絶縁層の厚さを 4.5mmとした構造では
65kVで同様の絶縁破壊を起した。これに対して図２及び
図３に示す従来の超電導ブスバーにおいて、電気絶縁層
の厚さが 1.2mmの場合の絶縁破壊電圧はそれぞれ５kVと
10kVであり、また電気絶縁層の厚さが 4.5mmの場合の絶
縁破壊電圧はそれぞれ５kVと30kVであった。The electric insulating layer was placed under a vacuum of 10 -5 Torr, the cryogenic refrigerant tube was used as a high-voltage electrode, the ground electrode was grounded, and a negative DC voltage was applied at a rate of 1 kV / min.
Dielectric breakdown at kV. The failure was not a penetrating failure of the semi-synthetic paper but occurred through a vacuum gap between the semi-synthetic papers. In the same way as above, the thickness of the electrical insulation layer is 4.5 mm.
Similar breakdown occurred at 65 kV. On the other hand, in the conventional superconducting bus bar shown in FIGS. 2 and 3, when the thickness of the electric insulating layer is 1.2 mm, the breakdown voltage is 5 kV, respectively.
It was 10 kV, and the dielectric breakdown voltage when the thickness of the electric insulating layer was 4.5 mm was 5 kV and 30 kV, respectively.
【００１３】このように本発明ブスバーによれば、超電
導線を内包し、極低温冷媒が内部を流れる中空の管の外
側に電気絶縁性テープを重ね巻きし、更に接地電極を巻
き付け、電気絶縁性テープを高真空下に配置することに
より、従来の超電導ブスバーと比較し、その構造を複雑
にすることなく電気絶縁性能を飛躍的に向上することが
できることが判る。As described above, according to the busbar of the present invention, a superconducting wire is included, an electrically insulating tape is wrapped around the hollow tube through which the cryogenic refrigerant flows, and a ground electrode is further wound around the hollow tube. It can be seen that by arranging the tape under a high vacuum, the electrical insulation performance can be dramatically improved without complicating the structure as compared with the conventional superconducting busbar.
【００１４】[0014]
【発明の効果】以上説明したように本発明によれば、従
来の超電導ブスバーと比較し、その構造を従来よりも簡
素化し、かつ電気絶縁性能を飛躍的に向上することがで
きる等工業上顕著な効果を奏するものである。As described above, according to the present invention, as compared with the conventional superconducting busbar, the structure thereof is simpler than before and the electric insulation performance can be remarkably improved. It has a great effect.
【図１】本発明超電導ブスバーを示す断面図である。FIG. 1 is a sectional view showing a superconducting bus bar of the present invention.
【図２】＋極導体と−極導体の間の電気絶縁層を設ける
方式の従来超電導ブスバーを示す断面図である。FIG. 2 is a cross-sectional view showing a conventional superconducting bus bar of a type in which an electric insulating layer is provided between a positive electrode conductor and a negative electrode conductor.
【図３】単極円形導体の外周に電気絶縁層を設ける方式
の従来超電導ブスバーを示す断面図である。FIG. 3 is a cross-sectional view showing a conventional superconducting busbar of a type in which an electric insulating layer is provided on the outer periphery of a single-pole circular conductor.
１ ＋極導体 ２ −極導体 ３ 電気絶縁体 ４，４′ 極低温冷媒の流路を形成する中空管 ５，５´ 極低温冷媒の流路 ６ 断熱層 ７ 接地電極 ８ 高真空に保持するための管 DESCRIPTION OF SYMBOLS 1 + pole conductor 2-pole conductor 3 Electric insulator 4, 4 'Hollow tube which forms a flow path of cryogenic refrigerant 5, 5' Flow path of cryogenic refrigerant 6 Heat insulation layer 7 Ground electrode 8 Maintain high vacuum Tube for
───────────────────────────────────────────────────── フロントページの続き (72)発明者 長房 利明 愛知県名古屋市東区東新町一番地 中部 電力株式会社内 (72)発明者 三澤 弘和 愛知県名古屋市東区東新町一番地 中部 電力株式会社内 (56)参考文献 特開 昭51−9286（ＪＰ，Ａ) 特開 昭50−92500（ＪＰ，Ａ) 実開 昭48−22777（ＪＰ，Ｕ) 実開 昭49−69082（ＪＰ，Ｕ) 特公 昭51−8185（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) H01B 12/00 - 13/00 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshiaki Nagafusa Higashi-Shin-cho, Higashi-ku, Nagoya-shi, Aichi Chubu Electric Power Co., Inc. (56) References JP-A-51-9286 (JP, A) JP-A-50-92500 (JP, A) JP-A-48-22777 (JP, U) JP-A-49-69082 (JP, U) No. 51-8185 (JP, B1) (58) Fields investigated (Int. Cl. 7 , DB name) H01B 12/00-13/00
Claims (3)
電導線を設置し、該中空管の外側に電気絶縁性テープを
重ね巻きし、且つその外側に接地電極を設け、さらに電
気絶縁性テープを高真空下に保持したことを特徴とする
超電導ブスバー。1. A superconducting wire is installed in a cryogenic refrigerant flowing inside a hollow tube, an electrically insulating tape is wrapped around the outside of the hollow tube, and a ground electrode is provided outside the tube. A superconducting bus bar characterized by holding an insulating tape under a high vacuum.
ピレンテープの両側からクラフト紙を張り合わせた構造
を有する半合成紙、不織布又はクラフト紙を用いる請求
項１記載の超電導ブスバー。2. The superconducting bus bar according to claim 1, wherein a semi-synthetic paper, a nonwoven fabric, or a kraft paper having a structure in which kraft paper is bonded to both sides of a biaxially oriented polypropylene tape is used as the electrically insulating tape.
を接着した金属化紙、エンボス加工した導電性テープ、
細線をよった編組線、又はこれらと螺旋巻きした低抵抗
導線の複合構造からなる請求項１記載の超電導ブスバ
ー。3. A metallized paper having a ground electrode bonded to a metal foil on one side of kraft paper, an embossed conductive tape,
2. The superconducting bus bar according to claim 1, wherein the superconducting bus bar has a composite structure of a braided wire made of a thin wire or a low-resistance conductive wire spirally wound therewith.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26421792A JP3268659B2 (en) | 1992-09-07 | 1992-09-07 | Superconducting busbar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26421792A JP3268659B2 (en) | 1992-09-07 | 1992-09-07 | Superconducting busbar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0689617A JPH0689617A (en) | 1994-03-29 |
| JP3268659B2 true JP3268659B2 (en) | 2002-03-25 |
Family
ID=17400126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26421792A Expired - Fee Related JP3268659B2 (en) | 1992-09-07 | 1992-09-07 | Superconducting busbar |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3268659B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4676095B2 (en) * | 2001-07-12 | 2011-04-27 | 古河電気工業株式会社 | Superconducting cable |
| EP2369600B1 (en) * | 2010-03-04 | 2012-08-29 | Nexans | Direct current supraconductor cable |
| DK2685469T3 (en) * | 2012-07-11 | 2017-08-14 | Nexans | Arrangement with at least one superconducting cable |
-
1992
- 1992-09-07 JP JP26421792A patent/JP3268659B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0689617A (en) | 1994-03-29 |
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