JPS6156856B2 - - Google Patents
Info
- Publication number
- JPS6156856B2 JPS6156856B2 JP55137627A JP13762780A JPS6156856B2 JP S6156856 B2 JPS6156856 B2 JP S6156856B2 JP 55137627 A JP55137627 A JP 55137627A JP 13762780 A JP13762780 A JP 13762780A JP S6156856 B2 JPS6156856 B2 JP S6156856B2
- Authority
- JP
- Japan
- Prior art keywords
- superconducting coil
- superconducting
- switch
- coil
- inverter power
- 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
Links
- 238000010791 quenching Methods 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 7
- 230000005284 excitation Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 230000002238 attenuated effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 239000002887 superconductor Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/001—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for superconducting apparatus, e.g. coils, lines, machines
-
- 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
- Protection Of Static Devices (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
Description
【発明の詳細な説明】
本発明は超電導コイルの保護装置に係り、特に
超電導コイルの超電導状態が破れて常電導状態に
転移した場合に超電導コイルを保護する保護装置
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a protection device for a superconducting coil, and more particularly to a protection device for protecting a superconducting coil when the superconducting state of the superconducting coil is broken and transferred to a normal conducting state.
超電導コイルは臨界温度以下の極低温に冷却さ
れて電気抵抗が零となる超電導体の巻回により構
成されるものである。この超電導体は臨界温度以
上の温度になること、あるいは臨界電流以上の電
流が流れること等によつて、超電導状態を保持で
きなくなり常電導状態に転移してしまう。超電導
コイルが常電導状態に転移すると電気抵抗零であ
つたものが超電導コイルに抵抗が発生し、超電導
コイルのエネルギーが急激に発熱によつて外部へ
放出されることになる。このため、超電導コイル
の損焼、溶断などの重大事故が発生する恐れがあ
り、これを防止するために保護装置が設けられて
いる。 A superconducting coil is constructed by winding a superconductor whose electrical resistance becomes zero when cooled to an extremely low temperature below the critical temperature. When this superconductor reaches a temperature higher than its critical temperature or a current higher than its critical current flows, it becomes unable to maintain its superconducting state and transitions to a normal conductive state. When the superconducting coil transitions to a normal conductive state, resistance occurs in the superconducting coil, which had previously had zero electrical resistance, and the energy of the superconducting coil is rapidly released to the outside through heat generation. For this reason, serious accidents such as burnout and melting of the superconducting coils may occur, and protection devices are provided to prevent this.
第１図、及び第２図は従来の超電導コイルの保
護装置を示すもので、第１図は超電導コイル１の
保護手段として、超電導コイル１と並例に外部に
１台の保護抵抗２を設けたものである。超電導コ
イル１はスイツチ３を介して励磁電源４により励
磁されているが、いま、何らかの原因で超電導コ
イル１の超電導状態が破れて常電導状態に転移し
た場合には、超電導コイル１を励磁している励磁
電源４をスイツチ３により切離す。これによつて
超電導コイル１内の磁気エネルギーを超電導コイ
ル１と並列に接続される保護抵抗２に放出させ、
超電導コイル１を保護しようとするものである。
また、第２図に示す従来例は超電導コイル１の保
護手段として、超電導コイル１と並列に外部に設
けた保護抵抗２を複数にし、そして、それぞれの
保護抵抗２は直列にスイツチ５を介して接続され
ている。６は超電導コイル１の常電導状態への転
移を検知するクエンチ検知器、７はクエンチ検知
器６からのクエンチ信号に応じて保護抵抗２を切
り換えるようにスイツチ５を開閉指示する制御器
である。超電導コイル１はスイツチ３を介して励
磁電源４により励磁されているが、いま、何らか
の原因で超電導コイル１の超電導状態が破れて常
電導状態に転移した場合にはスイツチ３を切り離
すが、この際、クエンチ検知器６からのクエンチ
信号に応じて、即ち超電導コイル１の常電導転移
状態に応じて制御器７で所望のスイツチ５を閉
じ、所望の保護抵抗２を接続する。これにより、
超電導コイル１内の磁気エネルギーを複数の保護
抵抗２に放出させ、超電導コイル１を保護しよう
とするものである。 Figures 1 and 2 show conventional superconducting coil protection devices. In Figure 1, a protective resistor 2 is provided outside the superconducting coil 1 as a means of protecting the superconducting coil 1. It is something that The superconducting coil 1 is excited by the excitation power source 4 via the switch 3, but if the superconducting state of the superconducting coil 1 breaks for some reason and transfers to the normal conducting state, the superconducting coil 1 is excited. The excitation power source 4 that is present is disconnected by the switch 3. This causes the magnetic energy in the superconducting coil 1 to be released to the protective resistor 2 connected in parallel with the superconducting coil 1,
This is intended to protect the superconducting coil 1.
Furthermore, in the conventional example shown in FIG. 2, as a means for protecting the superconducting coil 1, a plurality of protective resistors 2 are provided externally in parallel with the superconducting coil 1, and each protective resistor 2 is connected in series through a switch 5. It is connected. 6 is a quench detector that detects transition of the superconducting coil 1 to a normal conductive state; 7 is a controller that instructs the switch 5 to open or close so as to switch the protective resistor 2 in response to a quench signal from the quench detector 6; The superconducting coil 1 is excited by the excitation power source 4 via the switch 3, but if the superconducting state of the superconducting coil 1 breaks for some reason and transfers to the normal conducting state, the switch 3 will be disconnected. In response to the quench signal from the quench detector 6, that is, in response to the normal conduction transition state of the superconducting coil 1, the controller 7 closes a desired switch 5 and connects a desired protective resistor 2. This results in
The purpose is to protect the superconducting coil 1 by discharging the magnetic energy within the superconducting coil 1 to a plurality of protective resistors 2.
しかしながら、上述した従来の超電導コイルの
保護装置には次のような問題があつた。即ち、第
１図のものは、超電導コイルの保護の見地から常
電導部分での発熱による温度上昇をなるべく低減
するために、コイル電流をすみやかに減衰させる
必要があり、このために大きな抵抗値を有する保
護抵抗を必要とするが、抵抗値が大き過ぎるとコ
イル端子間電圧が許容絶縁電圧を越えてしまう。
また、第２図のものは、保護抵抗の切り換え時に
コイル端子間に大きな電圧が発生し、これも許容
絶縁電圧を越えてしまうという欠点があつた。 However, the conventional superconducting coil protection device described above has the following problems. In other words, in the case of the one shown in Figure 1, from the standpoint of protecting the superconducting coil, it is necessary to quickly attenuate the coil current in order to reduce the temperature rise due to heat generation in the normal conducting part as much as possible, and for this purpose a large resistance value is used. However, if the resistance value is too large, the voltage between the coil terminals will exceed the allowable insulation voltage.
Furthermore, the device shown in FIG. 2 has the disadvantage that a large voltage is generated between the coil terminals when the protective resistor is switched, and this also exceeds the allowable insulation voltage.
本発明は上述の点に鑑み成されたもので、その
目的とするところは、コイル電流を減衰させた
り、あるいは、複数の保護手段を切り換える時で
あつても、コイル端子間電圧は許容絶縁電圧以下
に保ちつづけることのできる超電導コイルの保護
装置を提供するにある。 The present invention has been made in view of the above points, and its purpose is to reduce the voltage between the coil terminals to the allowable insulation voltage even when the coil current is attenuated or when multiple protection means are switched. An object of the present invention is to provide a protection device for a superconducting coil that can continue to maintain the following properties.
本発明は超電導コイルに並列、もしくは直列に
接続され、該超電導コイルを保護する少なくとも
１個の保護手段をインバータ電源とすることによ
り所期の目的を達成するようになしたものであ
る。 The present invention achieves its intended purpose by using an inverter power source as at least one protection means connected in parallel or in series to a superconducting coil to protect the superconducting coil.
以下、図面の実施例に基づいて本発明を詳細に
説明する。尚、符号は従来と同一のものは同符号
を使用する。 Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings. Incidentally, the same reference numerals are used for the same parts as in the past.
第３図に本発明の超電導コイルの保護装置の一
実施例を示す。 FIG. 3 shows an embodiment of the superconducting coil protection device of the present invention.
該図に示す本実施例では、超電導コイル１と並
列に複数個のインバータ電源８を設け、それらは
各々スイツチ５を介して接続されている。更に各
スイツチ５は、クエン検知器６での超電導コイル
１の常電導転移検知と同時に、クエンチ信号に応
じて制御器７によりインバータ電源８と超電導コ
イル１との接続を行うようにしている。 In the embodiment shown in the figure, a plurality of inverter power supplies 8 are provided in parallel with the superconducting coil 1, and are connected to each other via a switch 5. Furthermore, each switch 5 connects the inverter power supply 8 and the superconducting coil 1 by the controller 7 in response to the quench signal at the same time as the quench detector 6 detects the transition to normal conductivity of the superconducting coil 1.
次に本実施例構成による動作を説明する。 Next, the operation according to the configuration of this embodiment will be explained.
超電導コイル１はスイツチ３を介して励磁電源
４により励磁されているが、いま、何らかの原因
で超電導コイル１の超電導状態が破れて常電導状
態に転移した場合には、スイツチ３を切り離す
が、この際、クエンチ検知器６からのクエンチ信
号に応じて、即ち超電導コイル１の常電導転移状
態に応じて制御器７で所望のスイツチ５を閉じ、
所望のインバータ電源８を接続する。 The superconducting coil 1 is excited by the excitation power source 4 via the switch 3, but if the superconducting state of the superconducting coil 1 breaks for some reason and transfers to the normal conducting state, the switch 3 is disconnected. At this time, the desired switch 5 is closed by the controller 7 in response to a quench signal from the quench detector 6, that is, in response to the normal conduction transition state of the superconducting coil 1.
Connect the desired inverter power supply 8.
これにより、超電導コイル１が常電導に転移し
ても超電導コイル１内の磁気エネルギーを複数個
のインバータ電源８を介して外部へ転送すること
により超電導コイル１を保護できるもので、超電
導コイル１の保護手段としてインバータ電源８で
あれば、超電導コイル端子より見たインバータ電
源側インピーダンスを充分小さくでき、コイル電
流を急速に減衰させても、また、複数のインバー
タ電源８を切り換えてもコイル端子間電圧は許容
絶縁電圧以下に保ちつづけることができ、しか
も、最大速度でもつて超電導コイル１内の磁気エ
ネルギーを外部に除去できるものである。 As a result, even if the superconducting coil 1 changes to normal conductivity, the superconducting coil 1 can be protected by transferring the magnetic energy within the superconducting coil 1 to the outside via the plurality of inverter power supplies 8. If the inverter power supply 8 is used as a protection measure, the impedance on the inverter power supply side seen from the superconducting coil terminals can be sufficiently reduced, and even if the coil current is rapidly attenuated or multiple inverter power supplies 8 are switched, the voltage between the coil terminals will remain the same. can be maintained below the allowable insulation voltage, and can also remove the magnetic energy within the superconducting coil 1 to the outside even at maximum speed.
尚、上述した実施例は、インバータ電源８を超
電導コイル１と並列接続したものについて説明し
たが、直列に接続したものであつても同様の効果
を得ることができる。 Although the above-described embodiment has been described with respect to the inverter power source 8 connected in parallel with the superconducting coil 1, the same effect can be obtained even if the inverter power source 8 is connected in series.
以上説明した本発明の超電導コイルの保護装置
によれば、超電導コイルに並列、もしくは直列に
接続され、該超電導コイルを保護する少なくとも
１個の保護手段をインバータ電源としたものであ
るから、超電導コイル端子より見たインバータ電
源側インピーダンスを充分小さくできるため、コ
イル電流を急速に減衰させても、また、複数のイ
ンバータ電源を切り換えてもコイル端子間電圧を
許容絶縁電圧以下に保ちつづけることができ、此
種超電導コイルを保護する場合には非常に有効で
ある。 According to the superconducting coil protection device of the present invention described above, since at least one protection means that is connected in parallel or in series with the superconducting coil and protects the superconducting coil is an inverter power source, the superconducting coil Since the impedance on the inverter power supply side seen from the terminals can be made sufficiently small, even if the coil current is rapidly attenuated or multiple inverter power supplies are switched, the voltage between the coil terminals can be maintained below the allowable insulation voltage. It is very effective when protecting this kind of superconducting coil.
第１図、及び第２図は各々従来の超電導コイル
の保護装置を示す回路図、第３図は本発明の超電
導コイルの保護装置の一実施例を示す回路図であ
る。
１……超電導コイル、２……保護抵抗、３，５
……スイツチ、４……励磁電源、６……クエンチ
検知器、７……制御器、８……インバータ電源。
1 and 2 are circuit diagrams showing conventional superconducting coil protection devices, respectively, and FIG. 3 is a circuit diagram showing an embodiment of the superconducting coil protection device of the present invention. 1...Superconducting coil, 2...Protective resistor, 3,5
... Switch, 4 ... Excitation power supply, 6 ... Quench detector, 7 ... Controller, 8 ... Inverter power supply.
Claims (1)
しくは直列に接続され該超電導コイルを保護する
少なくとも１個の保護手段と、前記超電導コイル
の常電導転移を検知するクエンチ検知器と、該ク
エンチ検出器からのクエンチ信号に応じて前記超
電導コイルと保護手段とを閉路させる制御器とを
備えたものにおいて、前記保護手段をインバータ
電源としたことを特徴とする超電導コイルの保護
装置。 ２ 前記超電導コイルとインバータ電源をスイツ
チを介して接続し、該スイツチを前記制御器によ
り閉路することを特徴とする特許請求の範囲第１
項記載の超電導コイルの保護装置。 ３ 前記インバータ電源を複数個設け、それぞれ
が前記超電導コイルとスイツチを介して接続され
ていることを特徴とする特許請求の範囲第１項、
または第２項記載の超電導コイルの保護装置。[Scope of Claims] 1. A superconducting coil, at least one protection means connected in parallel or in series with the superconducting coil to protect the superconducting coil, and a quench detector detecting normal conduction transition of the superconducting coil. A protection device for a superconducting coil, comprising: a controller that closes a circuit between the superconducting coil and the protection means in response to a quench signal from the quench detector, wherein the protection means is an inverter power source. 2. Claim 1, characterized in that the superconducting coil and the inverter power source are connected via a switch, and the switch is closed by the controller.
Protective device for superconducting coils as described in . 3. Claim 1, characterized in that a plurality of said inverter power supplies are provided, each of which is connected to said superconducting coil via a switch.
Or the superconducting coil protection device according to item 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55137627A JPS5762501A (en) | 1980-10-03 | 1980-10-03 | Protective device for superconductive coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55137627A JPS5762501A (en) | 1980-10-03 | 1980-10-03 | Protective device for superconductive coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5762501A JPS5762501A (en) | 1982-04-15 |
| JPS6156856B2 true JPS6156856B2 (en) | 1986-12-04 |
Family
ID=15203074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55137627A Granted JPS5762501A (en) | 1980-10-03 | 1980-10-03 | Protective device for superconductive coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5762501A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100929657B1 (en) | 2007-08-23 | 2009-12-03 | 한국기초과학지원연구원 | Quench detection device and real-time quench monitoring system of superconducting tokamak device |
-
1980
- 1980-10-03 JP JP55137627A patent/JPS5762501A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5762501A (en) | 1982-04-15 |
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