JPH03219610A - Current-limiting reactor - Google Patents
Current-limiting reactorInfo
- Publication number
- JPH03219610A JPH03219610A JP2013628A JP1362890A JPH03219610A JP H03219610 A JPH03219610 A JP H03219610A JP 2013628 A JP2013628 A JP 2013628A JP 1362890 A JP1362890 A JP 1362890A JP H03219610 A JPH03219610 A JP H03219610A
- Authority
- JP
- Japan
- Prior art keywords
- winding
- current
- superconductor
- cooling container
- cooled
- 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.)
- Pending
Links
- 238000004804 winding Methods 0.000 claims abstract description 32
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 239000002887 superconductor Substances 0.000 claims abstract description 15
- 230000005291 magnetic effect Effects 0.000 abstract description 13
- 230000004907 flux Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- KNYAMFPIBOJKIO-UHFFFAOYSA-N [Nb].[Nb].[Nb].[Sn] Chemical compound [Nb].[Nb].[Nb].[Sn] KNYAMFPIBOJKIO-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052734 helium Inorganic materials 0.000 abstract description 2
- 239000001307 helium Substances 0.000 abstract description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 230000005292 diamagnetic effect Effects 0.000 abstract 1
- 229910000657 niobium-tin Inorganic materials 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 239000002889 diamagnetic material Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
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
Abstract
Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は、限流リアクトルに関する。[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a current limiting reactor.
（従来の技術）
従来の限流リアクトルが接続された主回路単線結線図を
示す第５図において、直列に接続された限流リアクトル
５と電磁接触器４Ｂには、電磁接触器４Ａが並列に接続
されて限流回路を構成し、これらの電源側（図示左側）
は図示しない遮断器を介して三相交流電源に接続され、
負荷側には図示しない電動機の負荷が接続されている。(Prior Art) In FIG. 5, which shows a main circuit single-line diagram to which a conventional current limiting reactor is connected, the current limiting reactor 5 and the electromagnetic contactor 4B are connected in series, and the electromagnetic contactor 4A is connected in parallel. These are connected to form a current-limiting circuit, and these power supply sides (left side in the illustration)
is connected to a three-phase AC power supply via a circuit breaker (not shown),
A load of an electric motor (not shown) is connected to the load side.
このように構成された限流回路において、電磁接触器４
Ａ、 ４Ｂが投入されて図示しない負荷に電力が供給さ
れているときに、もし、負荷側の短絡事故が発生すると
、まず、電磁接触器４Ａが開極され、次いで電磁接触器
４Ｂを開極することで、限流リアクトル５で短絡電流を
抑えて電磁接触器４Ｂによる大電流の遮断を可能にして
いる。In the current limiting circuit configured in this way, the electromagnetic contactor 4
If a short-circuit accident occurs on the load side while A and 4B are turned on and power is being supplied to a load (not shown), first the electromagnetic contactor 4A is opened, and then the electromagnetic contactor 4B is opened. By doing so, the short circuit current is suppressed by the current limiting reactor 5, and the large current can be interrupted by the electromagnetic contactor 4B.
ところで、従来のりアクドルの電流とインダクタンスの
関係は、第６図に示すように、主に限流リアクトルに使
われる空心形のものは点線Ｂに示すように電流値に関係
なく一定であり、又、分路リアクトルや消弧リアクトル
などに使われるギャップ付リアクトルは、同図二点鎖線
りで示すように電流がある地点まで増えると急激に垂下
した後はぼ平行となり、更に、ギャップなしりアクドル
では、同図−点鎖線Ｃで示すように、徐々に垂下してい
て、いづれも電流とともに増えるものはない。By the way, as shown in Figure 6, the relationship between the current and inductance of a conventional glue reactor is constant regardless of the current value in the case of the air-core type, which is mainly used for current limiting reactors, as shown by the dotted line B. , a reactor with a gap used as a shunt reactor or an arc-extinguishing reactor, as shown by the two-dot chain line in the same figure, when the current increases to a certain point, it droops rapidly and then becomes nearly parallel. As shown by the dotted chain line C in the same figure, the currents gradually droop, and none of them increases with the current.
（発明が解決しようとするＩ！題）
ところが、従来の限流リアクトルでは、第５図に示すよ
うに、事故電流に対応するために主回路には１台の電磁
接触器が要るだけでなく、電磁接触器４’Ａ、４Ｂの動
作順序と動作時刻などを制御するために制御回路が複雑
となる。(I! Problem to be solved by the invention) However, in the conventional current limiting reactor, as shown in Fig. 5, only one magnetic contactor is required in the main circuit to cope with fault current. However, the control circuit becomes complicated in order to control the operation order and operation time of the electromagnetic contactors 4'A and 4B.
更に、第６図で示すように、事故電流に対してインダク
タンスが減少又は不変であるが、増える特性のりアクド
ルはないので、電磁接触器４Ｂの遮断容量は大きいもの
が要る。Further, as shown in FIG. 6, the inductance decreases or remains unchanged with respect to the fault current, but since there is no characteristic of increasing the inductance, the electromagnetic contactor 4B needs to have a large breaking capacity.
そこで、本発明の目的は、主回路と制御回路を簡素化す
ることのできる限流リアクトルを得ることである。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to obtain a current-limiting reactor whose main circuit and control circuit can be simplified.
（課題を解決するための手段および作用）本発明は、限
流リアクトルを、冷却容器と、この冷却容器内に設けら
れた筒状の巻線と、この巻線内に貫挿され冷却容器で超
電導状態に冷却される超電導体で構成することで、巻線
に流れる事故電流による巻線の磁束を超電導体に貫通さ
せインダクタンスを増やして、事故電流を抑えた限流リ
アクトルである。(Means and effects for solving the problem) The present invention provides a current limiting reactor that includes a cooling vessel, a cylindrical winding provided in the cooling vessel, and a cooling vessel inserted through the winding. This current-limiting reactor is constructed with a superconductor that is cooled to a superconducting state, allowing the magnetic flux of the winding caused by the fault current flowing through the winding to pass through the superconductor, increasing inductance, and suppressing the fault current.
（実施例）
以下、本発明の限流リアクトルの一実施例を図面を参照
して説明する。(Example) Hereinafter, one example of the current limiting reactor of the present invention will be described with reference to the drawings.
第１図は、本発明の限流リアクトルの縦断面図である。FIG. 1 is a longitudinal sectional view of the current limiting reactor of the present invention.
同図において、上端が蓋３ａで密封され内部が図示しな
い液体ヘリウムの冷却装置で冷却される縦断面Ｕ字状の
冷却容器３の内部には、円筒状に巻かれた巻線２が縦に
収納され、この巻線２の巻き始めと巻き終りは冷却容器
３に設けられた図示しない接続端子に接続され、巻線２
の内部には三ニオブ錫（Ｎｂ、 Ｓｎ ）で製作された
丸棒状の超電導体１が同軸に貫挿されている。In the figure, a cylindrical winding 2 is vertically wound inside a cooling container 3 having a U-shaped longitudinal section and whose upper end is sealed with a lid 3a and whose interior is cooled by a liquid helium cooling device (not shown). The winding 2 is stored, and the winding start and winding end are connected to connection terminals (not shown) provided in the cooling container 3, and the winding 2
A round bar-shaped superconductor 1 made of triniobium tin (Nb, Sn) is coaxially inserted into the inside of the tube.
このように構成された限流リアクトルにおいては、超電
体１は、巻線２が接続された主回路の機器の定格電流の
通電による磁界が臨界磁界となる温度以下に先づ冷却容
器３で冷却される。In the current limiting reactor configured in this way, the superelectric body 1 is first heated in the cooling vessel 3 at a temperature below which the magnetic field due to the rated current of the main circuit equipment to which the winding 2 is connected becomes a critical magnetic field. cooled down.
すると、超電導体１は、マイスナ効果で反磁性体となっ
て内部には磁束が通過しないので、巻線２のインダクタ
ンスは減少する。Then, the superconductor 1 becomes a diamagnetic material due to the Meisner effect, and no magnetic flux passes through the superconductor 1, so the inductance of the winding 2 decreases.
ところが、もし、負荷側の事故で巻線２に流れる電流が
増えると、それまで超電導状態の超電導体１は常電導状
態となって、内部に磁束が通過して巻線２のインダクタ
ンスは急激に増えるので、事故電流を抑えることのでき
る限流リアクトルとなる。第６図の実線は、その特性を
示す。However, if the current flowing through the winding 2 increases due to an accident on the load side, the superconductor 1, which had been in a superconducting state, becomes a normal conductor, and magnetic flux passes through the inside, causing the inductance of the winding 2 to suddenly increase. As the current increases, it becomes a current-limiting reactor that can suppress fault current. The solid line in FIG. 6 shows its characteristics.
又、第２図は、巻線２に定格電流が流れているときの巻
線２の磁束６の分布を示し、上述のように超電導体１の
内部には通過せず、巻線２とに形成された空隙を通過し
ている。Moreover, FIG. 2 shows the distribution of the magnetic flux 6 in the winding 2 when the rated current is flowing through the winding 2, and as mentioned above, it does not pass into the superconductor 1 but is connected to the winding 2. It passes through the gap formed.
一方、第３図は、巻線２に事故電流が流れたときの巻線
２による磁束６の分布を示し、磁束６は超電導体１の内
部も通過してあたかも空心リアクトルの状態である。On the other hand, FIG. 3 shows the distribution of magnetic flux 6 due to the winding 2 when a fault current flows through the winding 2, and the magnetic flux 6 also passes through the inside of the superconductor 1, as if it were an air-core reactor.
又、第４図は、本発明の限流リアクトル７の接続図を示
し、限流リアクトル７の負荷側には１台の電磁接触器４
Ｃが接続されている。Moreover, FIG. 4 shows a connection diagram of the current limiting reactor 7 of the present invention, and one electromagnetic contactor 4 is installed on the load side of the current limiting reactor 7.
C is connected.
同図において、定常時には電磁接触器４ｃは投入されて
いて、負荷電流は少さいインダクタンスの限流リアクト
ル７を介して供給されるが、事故発生時には、限流リア
クトル７のインダクタンスの増大で抑えられた事故電流
は、小容量の電磁接触器４Ｃでも容易に遮断される。こ
の結果、従来と比べて電磁接触器を減らし制御回路を簡
略化することのできる限流リアクトルとなる。In the figure, during normal operation, the electromagnetic contactor 4c is turned on and the load current is supplied through the current limiting reactor 7 with a small inductance, but when an accident occurs, the inductance of the current limiting reactor 7 increases and the load current is suppressed. The fault current can be easily interrupted even by a small-capacity electromagnetic contactor 4C. As a result, a current-limiting reactor can be obtained which can reduce the number of electromagnetic contactors and simplify the control circuit compared to the conventional one.
なお、上記実施例において、冷却容器３による超電導体
１の冷却温度は、巻線２に流れる電流が主回路の定格電
流のときとしたが、定格電流でなくてもよく、超電導材
の種別や適用される回路や負荷に応じて任意に設定すれ
ばよい。In the above embodiment, the temperature at which the superconductor 1 is cooled by the cooling container 3 is set when the current flowing through the winding 2 is the rated current of the main circuit. It may be set arbitrarily depending on the applied circuit and load.
以上、本発明によれば、限流リアクトルを、冷却容器と
、この冷却容器と、この冷却容器内に設けられた筒状の
巻線と、この巻線内に貫挿され冷却容器で超電導状態に
冷却される超電導体で構成することで、事故時に巻線に
流れる電流で巻線２のインダクタンスを増やしたので、
主回路と制御回路を簡素化することのできる限流リアク
トルを得ることができる。As described above, according to the present invention, the current limiting reactor includes a cooling container, a cylindrical winding provided in the cooling container, and a superconducting state in the cooling container inserted into the winding. By constructing it with a superconductor that is cooled by
A current limiting reactor whose main circuit and control circuit can be simplified can be obtained.
第１図は本発明の限流リアクトルの一実施例を示す縦断
面図、第２図と第３図は本発明の限流リアクトルの作用
を示す説明図、第４図は本発明の限流リアクトルの適用
例を示す接続図、第５図は従来の限流リック１−ルの適
用例を示す接続図、第６図は従来の限流リアクトルの作
用を示す図である。FIG. 1 is a vertical cross-sectional view showing one embodiment of the current limiting reactor of the present invention, FIGS. 2 and 3 are explanatory views showing the action of the current limiting reactor of the present invention, and FIG. 4 is a current limiting reactor of the present invention. FIG. 5 is a connection diagram showing an example of application of a reactor, FIG. 5 is a connection diagram showing an example of application of a conventional current-limiting rick, and FIG. 6 is a diagram showing the operation of a conventional current-limiting reactor.
Claims (1)
と、この巻線内に貫挿され前記冷却容器で超電導状態に
冷却される超電導体でなる限流リアクトル。A current limiting reactor comprising a cooling container, a cylindrical winding provided in the cooling container, and a superconductor inserted into the winding and cooled to a superconducting state in the cooling container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013628A JPH03219610A (en) | 1990-01-25 | 1990-01-25 | Current-limiting reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013628A JPH03219610A (en) | 1990-01-25 | 1990-01-25 | Current-limiting reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03219610A true JPH03219610A (en) | 1991-09-27 |
Family
ID=11838504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2013628A Pending JPH03219610A (en) | 1990-01-25 | 1990-01-25 | Current-limiting reactor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03219610A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04307908A (en) * | 1991-04-05 | 1992-10-30 | Takaoka Electric Mfg Co Ltd | Current limiter |
-
1990
- 1990-01-25 JP JP2013628A patent/JPH03219610A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04307908A (en) * | 1991-04-05 | 1992-10-30 | Takaoka Electric Mfg Co Ltd | Current limiter |
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