JPH01268425A - Current limiter - Google Patents
Current limiterInfo
- Publication number
- JPH01268425A JPH01268425A JP63097851A JP9785188A JPH01268425A JP H01268425 A JPH01268425 A JP H01268425A JP 63097851 A JP63097851 A JP 63097851A JP 9785188 A JP9785188 A JP 9785188A JP H01268425 A JPH01268425 A JP H01268425A
- Authority
- JP
- Japan
- Prior art keywords
- superconducting
- elements
- current
- super
- conducting
- 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
- 230000005284 excitation Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/023—Current limitation using superconducting elements
-
- 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】
〔産業上の利用分野〕
この発明は、送・配電系統に使用される限流装置に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a current limiting device used in power transmission and distribution systems.
従来の限流装置としては、例えばナトリウム金属を用い
た永久ヒユーズ、あるいは鉄系線材等が用いられていた
が、これらは短時間の繰返し限流動作は熱的な問題のた
めに不可能であった。Conventional current-limiting devices have used, for example, permanent fuses made of sodium metal or iron-based wires, but these devices cannot perform short-term, repeated current-limiting operations due to thermal problems. Ta.
従来の限流装置は、上記のように熱的な問題のために短
時間の繰返し限流動作が不可能でありシステム運用上制
約が多いという問題があった。この発明は上記のような
問題点を解消するために成されたもので、短時間の繰返
し限流動作が可能な限流装置を得ることを目的とする。Conventional current limiting devices have a problem in that they are unable to perform repeated current limiting operations for a short period of time due to thermal problems as described above, and there are many restrictions on system operation. The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a current limiting device that can perform repeated current limiting operations for a short period of time.
この発明に係わる限流装置は、限流素子に複数個の超電
導素子を用い、各超電導素子の近傍に超電導制御コイル
配置するともに、主回路近傍に配置した電流センサから
の信号にもとづいて超電導制御コイルに制御信号を出力
する制御部を設けた。The current limiting device according to the present invention uses a plurality of superconducting elements as the current limiting element, has a superconducting control coil placed near each superconducting element, and performs superconducting control based on a signal from a current sensor placed near the main circuit. A control section was provided to output a control signal to the coil.
この発明における限流装置は、主回路近傍に配置した電
流センサからの信号にもとづいて制御部が各超電導制御
コイルに励磁、あるいは非励磁の制御信号を出力する。In the current limiting device according to the present invention, the control section outputs a control signal for energizing or de-energizing each superconducting control coil based on a signal from a current sensor placed near the main circuit.
これにより複数個の各超電導素子は順次交替しながら限
流動作を行う。As a result, each of the plurality of superconducting elements sequentially alternates and performs current limiting operation.
以下、この発明の一実施例を図について説明する。第１
図において、（１１は主回路でＡ端は電源側に、Ｂ端は
負荷側にそれぞれ接続されている。An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, (11 is the main circuit, the A terminal is connected to the power supply side, and the B terminal is connected to the load side.
（１ａ）は前記主回路ｆｉ＋から分岐した分岐主回路、
（２ａ） 、 （２ｂ） 、 （２ｃ）は前記主回路（
１）あるいは分岐主回路（１ａ）に直列に、かつ互いに
並列に接続された超電導素子、（３ａ）、 （３ｂ）
、 （３ｃ）は前記超電導素子（２ａ）。(1a) is a branch main circuit branched from the main circuit fi+;
(2a), (2b), and (2c) are the main circuits (
1) Or superconducting elements connected in series to the branch main circuit (1a) and in parallel with each other, (3a), (3b)
, (3c) is the superconducting element (2a).
（２ｂ） 、 （２ｃ） の近傍に設けられ外部からの
指令によって磁界を発生し前記超電導素子（２ａ） 、
（２ｂ） 、 （２ｃ）の状態（超電導あるいは常電
導）を制御する超電導制御コイル、（４）は前記主回路
（１）の近傍に設けられた変流器すなわち電流センサ、
（５）は前記変流器（４）からの電流検出信号を受けて
前記超電導制御コイル（３ａ） 、 （３ｂ） 、 （
３ｃ）に状Ｌｉ（超電導あるいは常電導）制御信号を出
力する制御部である。(2b), (2c) is provided near the superconducting element (2a), which generates a magnetic field in response to an external command.
(2b), a superconducting control coil that controls the state (superconducting or normal conducting) of (2c), (4) a current transformer or current sensor provided near the main circuit (1);
(5) receives the current detection signal from the current transformer (4) and connects the superconducting control coils (3a), (3b), (
3c) is a control unit that outputs a Li (superconducting or normal conducting) control signal.
次に動作について説明する超電導制御コイル（３ａ）
、 （３ｂ） 、 （３ｃ）は制御部（５）からの状態
（超電導あるいは常電導）制御信号を受けて励磁あるい
は非励磁の状態にある。この超電導制御コイル（３ａ）
。Next, the operation of the superconducting control coil (3a) will be explained.
, (3b), and (3c) are in an energized or de-energized state in response to a state (superconducting or normal conducting) control signal from the control unit (5). This superconducting control coil (3a)
.
（３ｂ） 、 （３ｃ）が励磁状態にあれば超電導素子
（２ａ） 。If (3b) and (3c) are in an excited state, it is a superconducting element (2a).
（２ｂ） 、 （２ｃ）は超電導制御コイル（３ａ）
、 （３ｂ） 、 （３ｃ）から超電導臨界磁界以上の
磁界を受けて常電導状態にある。また超電導制御コイル
（３ａ）、 （３ｂ） 、 （３ｃ）が非励磁状態にあ
れば、超電導素子（２ａ）、 （２ｂ） 、 （２ｃ）
は超電導状態すなわち抵抗ゼロの状態にある。通常の運
転状態においては、第１図に示す超電導素子（２ａ）の
１個は超電導状態に、他の２個（２ｂ）。(2b) and (2c) are superconducting control coils (3a)
, (3b) and (3c) are in a normal conductive state as a result of receiving a magnetic field greater than the superconducting critical magnetic field. Moreover, if the superconducting control coils (3a), (3b), (3c) are in a de-energized state, the superconducting elements (2a), (2b), (2c)
is in a superconducting state, that is, in a state of zero resistance. Under normal operating conditions, one of the superconducting elements (2a) shown in FIG. 1 is in a superconducting state, and the other two (2b) are in a superconducting state.
（２ｃ）は常電導状態にセントされ、主回路（１）を流
れる電流は超電導状態の素子（２ａ）のみを流れる。こ
の様な状態において、負荷Ｂ側で短絡等の事故が生じて
主回路＋１１に定格以上の大電流が流れた場合、早急に
限流動作して図示しない遮断器で事故部分の回路を開放
する必要がある。制御部（５）は変流器（４）を介して
常時主回路（１１を流れる電流を監視しており、上記の
ような異常事態が生じたときはただちにつうでんをして
いる超電導素子（２ａ）の近傍にある超電導制御コイル
（３ａ）を励磁して、通電をしている超電導素子（２ａ
）の超電導状態を破壊して限流動作をさせる。この限流
動作の過程で、超電導状態の破壊により生じる抵抗によ
るジュール熱によって限流動作をしている超電導素子（
２ａ）の温度が超電導臨界温度以上となるため、この素
子（２ａ）は数秒ないし数分の冷却時間が必要となる。(2c) is placed in a normal conducting state, and the current flowing through the main circuit (1) flows only through the element (2a) in a superconducting state. In such a situation, if an accident such as a short circuit occurs on the load B side and a large current exceeding the rating flows in the main circuit +11, the current limiter operates immediately and opens the faulty part of the circuit with a circuit breaker (not shown). There is a need. The control unit (5) constantly monitors the current flowing through the main circuit (11) via the current transformer (4), and when an abnormal situation such as the one described above occurs, the superconducting element is immediately turned off. The superconducting control coil (3a) near (2a) is excited and the superconducting element (2a) is energized.
) to destroy the superconducting state and perform current-limiting operation. In the process of this current-limiting operation, the superconducting element (
Since the temperature of element (2a) exceeds the superconducting critical temperature, this element (2a) requires a cooling time of several seconds to several minutes.
このため、制御部（５）は図示しない遮断器による事故
点切り離し後、超電導制御コイル（３ａ）の励磁を続け
たまま超電導制御コイル（３ｂ）の励磁を止め超電導素
子（２ｂ）を超電導状態として通電を継続させる。Therefore, after disconnecting the fault point using a circuit breaker (not shown), the control unit (5) stops the excitation of the superconducting control coil (3b) while continuing to excite the superconducting control coil (3a), and sets the superconducting element (2b) to a superconducting state. Continue energizing.
この様な状態において、負荷Ｂ側で事故が生じた時は、
上記と同じ要領で超電導素子（２ｂ）を常電導状態とし
、超電導素子（２ｃ）を超電導状態として運転を継続さ
せる。この後、超電導素子（２ｃ）を限流動作させたと
きは超電導素子（２ａ）に切り替えて運転を継続させる
。Under these conditions, if an accident occurs on the load B side,
In the same manner as above, the superconducting element (2b) is brought into a normal conductive state, and the superconducting element (2c) is brought into a superconducting state and the operation is continued. After this, when the superconducting element (2c) is brought into current limiting operation, it is switched to the superconducting element (2a) and the operation is continued.
なお、上記実施例では、超電導素子を３個並列接続し、
これを順次切り替えて使用する例を示したが、超電導素
子は３個に限定されるものではなく、２個でもあるいは
４個以上の任意の数であっても上記実施例と同等の効果
を奏する。In addition, in the above example, three superconducting elements are connected in parallel,
Although an example is shown in which these are sequentially switched and used, the number of superconducting elements is not limited to three, and even if two or any number of four or more superconducting elements are used, the same effect as in the above embodiment can be achieved. .
以上のように、この発明によれば、超電導限流素子を複
数個並列に接続し、これを順次切り替えて使用するよう
にしたので短時間の繰返し限流動作が可能な限流装置が
得られる効果がある。As described above, according to the present invention, a plurality of superconducting current-limiting elements are connected in parallel and used by sequentially switching them, thereby providing a current-limiting device capable of repeated short-time current-limiting operations. effective.
第１図はこの発明の一実施例による限流装置を示す単線
回路図である。
図中、（１１は主回路、（２ａ） （２ｂ） （２ｃ）
は超電導素子、（３ａ） （３ｂ） （３ｃ）は超電導
制御コイル、（４）は変流器すなわち電流センサ、（５
）は制御部である。
なお、図中、同一符号は同一、又は相当部分を示す。FIG. 1 is a single-line circuit diagram showing a current limiting device according to an embodiment of the present invention. In the figure, (11 is the main circuit, (2a) (2b) (2c)
is a superconducting element, (3a) (3b) (3c) is a superconducting control coil, (4) is a current transformer or current sensor, (5
) is the control section. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
電導素子と、この複数の超電導素子の近傍にそれぞれ配
置して設けられた超電導制御コイルと、前記主回路の近
傍に設けられて主回路電流を検出する電流センサと、こ
の電流センサからの信号にもとずいて前記超電導制御コ
イルに制御信号を出力する制御部とを少なくとも備えた
限流装置。A plurality of superconducting elements connected in series and in parallel to a main circuit, a superconducting control coil arranged near each of the plurality of superconducting elements, and a main circuit arranged near the main circuit. A current limiting device comprising at least a current sensor that detects a current, and a control section that outputs a control signal to the superconducting control coil based on a signal from the current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63097851A JPH01268425A (en) | 1988-04-19 | 1988-04-19 | Current limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63097851A JPH01268425A (en) | 1988-04-19 | 1988-04-19 | Current limiter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01268425A true JPH01268425A (en) | 1989-10-26 |
Family
ID=14203242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63097851A Pending JPH01268425A (en) | 1988-04-19 | 1988-04-19 | Current limiter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01268425A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0926797A2 (en) * | 1997-12-19 | 1999-06-30 | Abb Research Ltd. | Devices for limiting overcurrents |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6439221A (en) * | 1987-07-31 | 1989-02-09 | Toshiba Corp | Current-limiting breaker |
-
1988
- 1988-04-19 JP JP63097851A patent/JPH01268425A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6439221A (en) * | 1987-07-31 | 1989-02-09 | Toshiba Corp | Current-limiting breaker |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0926797A2 (en) * | 1997-12-19 | 1999-06-30 | Abb Research Ltd. | Devices for limiting overcurrents |
| EP0926797A3 (en) * | 1997-12-19 | 2000-07-26 | Abb Research Ltd. | Devices for limiting overcurrents |
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