JPH09260130A - Protection of superconductive current-carrying wire and device thereof - Google Patents
Protection of superconductive current-carrying wire and device thereofInfo
- Publication number
- JPH09260130A JPH09260130A JP7201196A JP7201196A JPH09260130A JP H09260130 A JPH09260130 A JP H09260130A JP 7201196 A JP7201196 A JP 7201196A JP 7201196 A JP7201196 A JP 7201196A JP H09260130 A JPH09260130 A JP H09260130A
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- Japan
- Prior art keywords
- coil
- superconducting coil
- current
- superconducting
- power supply
- 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.)
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- Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、超電導コイル通電
線の保護方法及びその装置に係り、特に、超電導磁気浮
上式鉄道の超電導磁石に用いる超電導コイル通電線の保
護方法及びその装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for protecting a superconducting coil current wire, and more particularly to a method and an apparatus for protecting a superconducting coil current wire used in a superconducting magnet of a superconducting magnetic levitation railway. .
【０００２】[0002]
【従来の技術】まず、従来の超電導磁気浮上式鉄道にお
ける励消磁時の超電導磁石のクエンチに対する超電導コ
イル通電線の保護方式について説明する。図２はかかる
従来の超電導磁気浮上式鉄道における超電導磁石の励消
磁システムの構成図である。2. Description of the Related Art First, a conventional method of protecting a superconducting coil current line from quenching of a superconducting magnet during demagnetization in a superconducting magnetic levitation railway will be described. FIG. 2 is a block diagram of an excitation / demagnetization system of a superconducting magnet in such a conventional superconducting magnetic levitation railway.
【０００３】従来の超電導磁気浮上式鉄道の超電導磁石
の励消磁においては、図２に示すように、超電導コイル
Ｃ１〜Ｃ４のクエンチ時に発生する異常電圧を検出する
ための異常電圧検出用配線５を、地上に設置される励磁
電源・制御装置１まで引き込み、その発生電圧からクエ
ンチを判断して励消磁時に給電している励磁電源・制御
装置１からの電源電流を強制遮断し、超電導コイル通電
線７を保護する方式であった。なお、２はクエンチ検出
器、３はＰＣＳヒータ電源、４は超伝導磁石、６は超電
導コイルＣ１〜Ｃ４に並列に接続される永久電流スイッ
チＰＣＳの開閉を制御する永久電流スイッチの制御線で
ある。In the conventional excitation / demagnetization of a superconducting magnet of a superconducting magnetic levitation type railway, as shown in FIG. 2, an abnormal voltage detecting wiring 5 for detecting an abnormal voltage generated at the time of quenching of the superconducting coils C1 to C4 is provided. , Pull up to the excitation power supply / control device 1 installed on the ground, judge the quench from the generated voltage, and forcibly cut off the power supply current from the excitation power supply / control device 1 that is supplying power at the time of demagnetization. It was a method of protecting 7. In addition, 2 is a quench detector, 3 is a PCS heater power source, 4 is a superconducting magnet, 6 is a control line of a permanent current switch for controlling the opening and closing of the permanent current switch PCS connected in parallel to the superconducting coils C1 to C4. .
【０００４】このような超電導コイル通電線の保護方式
では、超電導コイルＣ１〜Ｃ４のクエンチ時に発生する
異常電圧を検出する異常電圧検出用配線５を、全ての超
電導コイルＣ１〜Ｃ４から地上に設置される励磁電源・
制御装置１に接続する必要がある。また、かかる従来の
保護方式では、超電導磁気浮上式鉄道車両のような移動
するものについては、励消磁時には地上からの配線を接
続し、移動する場合には、取り外す必要がある。In such a superconducting coil energizing wire protection system, an abnormal voltage detecting wiring 5 for detecting an abnormal voltage generated during quenching of the superconducting coils C1 to C4 is installed on the ground from all the superconducting coils C1 to C4. Excitation power supply
It is necessary to connect to the control device 1. In addition, in such a conventional protection system, for a moving object such as a superconducting magnetic levitation type railway vehicle, it is necessary to connect wiring from the ground during demagnetization and remove it when moving.
【０００５】[0005]
【発明が解決しようとする課題】今後の超電導磁気浮上
式鉄道においては、上記したような励消磁時のクエンチ
検出としての配線は本数が多くなること等から、地上側
の装置に引き込むことを廃止し、車内に搭載している超
電導磁石制御装置に超電導コイルの異常電圧検出用配線
を引き込むようにしている。In the future superconducting magnetic levitation railway, since the number of wiring lines for quench detection at the time of excitation and demagnetization as described above is large, it is not necessary to pull it into a device on the ground side. However, the wiring for detecting abnormal voltage of the superconducting coil is drawn into the superconducting magnet control device installed in the vehicle.
【０００６】その場合、超電導磁石を励消磁する時の通
電時に超電導コイルにクエンチが発生すると、車内に搭
載している超電導磁石制御装置ではクエンチを検出する
ことができるが、電源電流を供給している励磁電源装置
側には、超電導コイルの異常が認識されず、通電を継続
してしまう。その結果、超電導コイル通電線を溶断する
恐れがある。In this case, if a quench occurs in the superconducting coil when the superconducting magnet is energized and deenergized, the superconducting magnet controller installed in the vehicle can detect the quench, but the power supply current is supplied. On the side of the exciting power supply, the abnormality of the superconducting coil is not recognized and the power supply continues. As a result, the superconducting coil energizing wire may be blown.
【０００７】以下、溶断するまでの経緯について説明す
る。超電導磁気浮上式鉄道の超電導コイルの一例として
は、図３に示すような結線図となっている。図３に示す
超電導コイル通電線ＰＬ１，ＰＬ２は、外部からの熱侵
入を極力少なくするため細い線が使われ、大電流にも耐
えられるように超電導線が使われる。Hereinafter, the process until the melting and cutting will be described. An example of the superconducting coil of the superconducting magnetic levitation railway has a wiring diagram as shown in FIG. As the superconducting coil conducting wires PL1 and PL2 shown in FIG. 3, thin wires are used to minimize heat intrusion from the outside, and superconducting wires are used so as to withstand a large current.
【０００８】前記のような通電線をもつ超電導磁石を励
消磁する時、超電導コイルが永久電流モードになってい
る状態で、かつ通電している時にコイルクエンチが発生
した場合に、以下のメカニズムにより超電導コイル通電
線を溶断する。前記結線図において、図４及び図５に示
すような励消磁パターンで通電する際、超電導コイルが
永久電流モード時にコイルクエンチが起こると、超電導
コイルが常電導化し、抵抗発生と共に発熱する。この
時、ＰＬ１から通電されている電流は永久電流スイッチ
ＰＣＳが閉じている状態であるため、永久電流スイッチ
ＰＣＳを経由してＰＬ２へ流れ続ける。When the superconducting magnet having the above-mentioned current-carrying wire is excited and demagnetized, when the superconducting coil is in the permanent current mode and a coil quench occurs while the power is being supplied, the following mechanism is used. The superconducting coil energizing wire is blown. In the connection diagram, when the superconducting coil is quenched in the permanent current mode when energized in the excitation / demagnetization pattern as shown in FIGS. 4 and 5, the superconducting coil becomes normal conducting and generates heat as well as resistance. At this time, the current supplied from PL1 continues to flow to PL2 via the permanent current switch PCS because the permanent current switch PCS is closed.
【０００９】その際、図３のＳ−Ｓ′及びＥ−Ｅ′間は
超電導コイルにモールドされている状態のため、超電導
コイルがクエンチして生じた発熱によりＳ−Ｓ′及びＥ
−Ｅ′間の超電導線も常電導化し抵抗が発生し、その状
態で電源電流が流れ続けると溶断することになる。ま
た、通電線が超電導コイルにモールドされていなくても
コイルクエンチにより発生した熱により通電線周囲の温
度が上昇し、上記と同様に通電線に抵抗が発生し電源電
流が流れ続けることにより溶断することとなる。At this time, since S-S 'and E-E' in FIG. 3 are in a state of being molded in the superconducting coil, S-S 'and E are generated by heat generated by quenching of the superconducting coil.
The superconducting wire between −E ′ also becomes normal conducting and resistance is generated, and if the power supply current continues to flow in that state, it will melt. Even if the current-carrying wire is not molded in the superconducting coil, the temperature around the current-carrying wire rises due to the heat generated by the coil quenching, and the resistance is generated in the current-carrying wire in the same manner as above, causing the power supply current to continue to melt and melt down. It will be.
【００１０】すなわち、図４において、点線より左側は
永久電流スイッチＰＣＳが開いた状態、点線より右側は
超電導コイルが永久電流モードであることを示してい
る。また、Ｔ01の区間が特に電源電流が大きい時にコイ
ルクエンチが発生すると、通電線は溶断する。更に、図
５において、点線より左側は超電導コイルが永久電流モ
ードであり、点線より右側は永久電流スイッチＰＣＳが
開いた状態であることを示している。また、Ｔ02の区間
において特に電源電流が大きい時にコイルクエンチが発
生すると、通電線は溶断する。That is, in FIG. 4, the left side of the dotted line shows the state in which the permanent current switch PCS is open, and the right side of the dotted line shows that the superconducting coil is in the persistent current mode. Further, when the coil quench occurs when the power supply current is particularly large in the section of T 01 , the current-carrying wire is melted. Further, in FIG. 5, the left side of the dotted line indicates that the superconducting coil is in the permanent current mode, and the right side of the dotted line indicates that the permanent current switch PCS is in the open state. In addition, if a coil quench occurs when the power supply current is particularly large in the section of T 02 , the current-carrying wire is blown.
【００１１】本発明は、上記問題点を除去し、超電導コ
イルを励消磁するため外部から超電導コイルに電流を通
電している時にコイルクエンチが発生した場合には、そ
のコイルクエンチを検出し、地上に設置されている励磁
電源装置でもって電源電流を遮断し、超電導コイル通電
線の焼損を防止し得る超電導コイル通電線の保護方法及
びその装置を提供することを目的とする。The present invention eliminates the above-mentioned problems and, in order to demagnetize the superconducting coil, when a coil quench occurs while a current is being supplied to the superconducting coil from the outside, the coil quench is detected, and the ground quench is detected. It is an object of the present invention to provide a method of protecting a superconducting coil energizing wire and a device thereof, which can prevent the burning of the superconducting coil energizing wire by shutting off the power supply current with the exciting power supply device installed in.
【００１２】[0012]
【課題を解決するための手段】本発明は、上記目的を達
成するために、 （１）地上に配置される励磁電源と、車両に搭載される
超電導磁石制御装置とを備え、超電導コイルを励消磁す
るため外部から超電導コイルに電流を通電している時に
コイルクエンチが発生した場合における超電導コイル通
電線の保護方法において、前記超電導コイルに設けられ
る異常電圧検出タップにおける異常電圧に基づいてコイ
ルクエンチを検出すると、前記超電導コイルと並列に接
続される永久電流スイッチＰＣＳを開にし、超電導コイ
ル通電線を介して過電圧検出を行い、この過電圧が所定
電圧を超えると、遮断器を動作させて電源電流を遮断す
るようにしたものである。In order to achieve the above object, the present invention comprises (1) an excitation power source arranged on the ground and a superconducting magnet control device mounted on a vehicle, which excites a superconducting coil. In a method of protecting a superconducting coil current line when a coil quench occurs when a current is being supplied to the superconducting coil from the outside for degaussing, a coil quench is performed based on an abnormal voltage in an abnormal voltage detection tap provided in the superconducting coil. When it is detected, the permanent current switch PCS connected in parallel with the superconducting coil is opened, and the overvoltage is detected through the superconducting coil energizing wire. When the overvoltage exceeds a predetermined voltage, the breaker is operated to change the power supply current. It is designed to be cut off.
【００１３】（２）地上に配置される励磁電源と、車両
に搭載される超電導磁石制御装置とを備え、超電導コイ
ルを励消磁するため外部から超電導コイルに電流を通電
している時にコイルクエンチが発生した場合における超
電導コイル通電線の保護装置において、前記超電導コイ
ルに設けられる異常電圧検出タップと、この異常電圧検
出タップにおける異常電圧に基づいて、超電導コイルと
並列に接続される永久電流スイッチＰＣＳを開にする制
御手段と、超電導コイル通電線を介して過電圧を検出す
る過電圧検出手段と、この過電圧検出手段の出力電圧と
所定電圧とを比較する比較手段と、この比較手段により
前記出力電圧が所定電圧を超えると、電源電流を遮断す
る遮断器とを設けるようにしたものである。(2) An exciting power source arranged on the ground and a superconducting magnet control device mounted on a vehicle are provided, and in order to demagnetize the superconducting coil, a coil quench is generated when a current is externally applied to the superconducting coil. In the protection device for the superconducting coil energizing wire when it occurs, an abnormal voltage detection tap provided on the superconducting coil, and a permanent current switch PCS connected in parallel with the superconducting coil based on the abnormal voltage at the abnormal voltage detection tap. Opening control means, overvoltage detection means for detecting an overvoltage via the superconducting coil energization wire, comparison means for comparing the output voltage of the overvoltage detection means with a predetermined voltage, and the comparison means for setting the output voltage to a predetermined value. A circuit breaker for shutting off the power supply current when the voltage exceeds the voltage is provided.
【００１４】上記のように構成したので、超電導磁石の
超電導コイルを励消磁するため外部から超電導コイルに
電流を通電している時にコイルクエンチが発生した場合
には、そのコイルクエンチを検出し、地上に設置されて
いる励磁電源装置でもって電源電流を遮断し、超電導コ
イル通電線の焼損を的確に防止することができる。With the above-described structure, when a coil quench occurs while a current is being supplied to the superconducting coil from the outside in order to demagnetize the superconducting coil of the superconducting magnet, the coil quench is detected and grounded. The power supply current can be interrupted by the excitation power supply device installed in the superconducting coil, and burnout of the superconducting coil energizing wire can be accurately prevented.
【００１５】[0015]
【発明の実施の形態】以下、本発明の実施の形態につい
て超電導磁気浮上式鉄道の超電導磁石の場合を例に挙げ
て説明する。図１は本発明の実施例を示す超電導コイル
通電線の保護方式の構成図である。ここでは、説明を簡
単にするために、永久電流スイッチＰＣＳに接続される
ダイオード及び保護抵抗（図６参照）は省略している。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below by taking a case of a superconducting magnet of a superconducting magnetic levitation railway as an example. FIG. 1 is a configuration diagram of a protection system for a superconducting coil current-carrying wire showing an embodiment of the present invention. Here, for simplification of description, the diode and the protection resistor (see FIG. 6) connected to the persistent current switch PCS are omitted.
【００１６】この図において、２１は車両内に搭載され
る超電導磁石制御装置、２２は車両の両側に搭載される
一対の超電導磁石であり、超電導コイルＣ１〜Ｃ４、そ
れぞれの超電導コイルＣ１〜Ｃ４と対応して並列に接続
される永久電流スイッチＰＣＳを有している。その超電
導コイルＣ１〜Ｃ４のそれぞれには異常電圧検出タップ
Ｔが設けられ、超電導コイルＣ１〜Ｃ４にクエンチが発
生した場合に、そのクエンチに起因する異常電圧を検出
して、異常電圧検出用配線２３を介して超電導磁石制御
装置２１により、クエンチした超電導コイルＣ１〜Ｃ４
の特定とその超電導コイルＣ１〜Ｃ４のクエンチを検出
することができる。In the figure, reference numeral 21 is a superconducting magnet control device mounted in the vehicle, 22 is a pair of superconducting magnets mounted on both sides of the vehicle, and is composed of superconducting coils C1 to C4 and respective superconducting coils C1 to C4. It has a corresponding persistent current switch PCS connected in parallel. An abnormal voltage detection tap T is provided on each of the superconducting coils C1 to C4. When a quench occurs in the superconducting coils C1 to C4, the abnormal voltage due to the quench is detected to detect the abnormal voltage detection wiring 23. Through the superconducting magnet control device 21 via the superconducting coils C1 to C4
And the quench of the superconducting coils C1 to C4 can be detected.
【００１７】また、永久電流スイッチＰＣＳは、ヒータ
ーＨと開閉部を備えており、永久電流スイッチ制御線２
４を介して、超電導磁石制御装置２１により、そのヒー
ターＨをオンオフすることにより、永久電流スイッチＰ
ＣＳの開閉部を制御することができる。一方、地上に配
置される励磁電源装置１１は、超電導コイル通電線２５
を介して超電導コイルＣ１〜Ｃ４に通電する。その励磁
電源装置１１には後述する過電圧検出装置１５と、この
過電圧検出装置１５の検出電圧と所定電圧（基準電圧）
とを比較する比較部１４と、遮断器１３と、励磁電源１
２とを備えている。The permanent current switch PCS includes a heater H and an opening / closing section, and the permanent current switch control line 2
The heater H is turned on and off by the superconducting magnet control device 21 via the switch 4, and the permanent current switch P
The opening / closing part of the CS can be controlled. On the other hand, the excitation power supply device 11 arranged on the ground has the superconducting coil conducting wire 25.
The superconducting coils C1 to C4 are energized via. The excitation power supply device 11 includes an overvoltage detection device 15, which will be described later, a detection voltage of the overvoltage detection device 15 and a predetermined voltage (reference voltage).
Comparing section 14 for comparing with, circuit breaker 13, excitation power supply 1
2 is provided.
【００１８】そこで、超電導コイルＣ１〜Ｃ４が永久電
流モードであり、かつ電源電流が通電されている時にコ
イルクエンチが発生した場合、車両に搭載している超電
導磁石制御装置２１によって、クエンチした超電導コイ
ルＣ１〜Ｃ４とそれがクエンチしたことを検知する。同
時に、超電導磁石制御装置２１からそのクエンチした超
電導コイルの永久電流スイッチＰＣＳのヒータＨを通電
加熱する。Therefore, when the superconducting coils C1 to C4 are in the permanent current mode and a coil quench occurs while the power supply current is being supplied, the superconducting magnet controller 21 mounted on the vehicle quenches the superconducting coils. Detect C1-C4 and its quench. At the same time, the superconducting magnet controller 21 energizes and heats the heater H of the permanent current switch PCS of the quenched superconducting coil.
【００１９】すると、永久電流スイッチＰＣＳに抵抗が
発生する。その永久電流スイッチＰＣＳの抵抗とコイル
クエンチにより発生した抵抗との並列回路による抵抗と
電源電流とで発生する電圧が、励磁電源装置１１の過電
圧検出装置１５を動作させ、比較部１４によりその検出
された過電圧と、予め記憶されている所定電圧とを比較
して、過電圧が所定電圧を超えると、遮断器１３を動作
させて、通電している電源電流を遮断する。Then, resistance is generated in the permanent current switch PCS. The voltage generated by the resistance of the parallel circuit of the resistance of the permanent current switch PCS and the resistance generated by the coil quench and the power supply current operates the overvoltage detection device 15 of the excitation power supply device 11, and is detected by the comparison unit 14. The overvoltage is compared with a predetermined voltage stored in advance, and when the overvoltage exceeds the predetermined voltage, the circuit breaker 13 is operated to cut off the energized power supply current.
【００２０】以下、本発明の具体例について説明する。
図１に示す過電圧検出装置１５と比較部１４は、励磁電
源装置３０（図６参照）に接続される超電導コイル通電
線２５間に、電源電流出力電圧メータと出力過電圧動作
リレーが組み込まれたメーターリレー３１によって構成
されている。また、遮断器３２は直流遮断器（ＤＣＣ
Ｂ）が用いられる。なお、３３は励磁電源である。Specific examples of the present invention will be described below.
The overvoltage detection device 15 and the comparison unit 14 shown in FIG. 1 are a meter in which a power supply current output voltage meter and an output overvoltage operation relay are incorporated between the superconducting coil conducting wires 25 connected to the excitation power supply device 30 (see FIG. 6). It is composed of a relay 31. The circuit breaker 32 is a DC circuit breaker (DCC
B) is used. Incidentally, 33 is an exciting power source.
【００２１】この出力過電圧動作リレーの設定値は、現
在±３００Ｖに設定されている。従って、負荷である超
電導磁石２２と接続して通電中に出力電圧が±３００Ｖ
を超えると、出力過電圧動作リレーが働き（接点が開
く）、中継のリレーが消磁され、リレーの操作用の接点
が閉じ、直流遮断器（ＤＣＣＢ）を遮断し、通電を断ち
切る。The set value of this output overvoltage operation relay is currently set to ± 300V. Therefore, the output voltage is ± 300 V when connected to the superconducting magnet 22 which is a load and energized.
When the voltage exceeds, the output overvoltage operation relay operates (contact opens), the relay relay is demagnetized, the relay operation contact closes, the DC circuit breaker (DCCB) is cut off, and the energization is cut off.
【００２２】図６は本発明の具体例を示す超電導磁石の
電気回路図である。この図において、Ｌ１〜Ｌ８は超電
導コイルであり、例えば、２．７Ｈ、Ｐ１〜Ｐ８は永久
電流スイッチＰＣＳ、Ｒ１〜Ｒ８は保護抵抗（０．１
Ω）、Ｄ１〜Ｄ８はダイオードである。図７は超電導磁
石の正常時の励磁時の出力電圧を示す図である。FIG. 6 is an electric circuit diagram of a superconducting magnet showing a specific example of the present invention. In this figure, L1 to L8 are superconducting coils, for example, 2.7H, P1 to P8 are permanent current switches PCS, and R1 to R8 are protective resistors (0.1).
Ω) and D1 to D8 are diodes. FIG. 7 is a diagram showing an output voltage when the superconducting magnet is normally excited.
【００２３】図７に示すように、電源電流が０の時点ｔ
11から約５００Ａに達する時点ｔ12までの出力電圧は約
１１０Ｖである。つまり、図６に示す超電導磁石では、
励磁時は電源電流は殆ど超電導コイル側へ流れることに
なり、出力電圧Ｖは、 Ｖ＝Ｌ1 （ｄｉ／ｄｔ）＋Ｌ2 （ｄｉ／ｄｔ）＋ …＋Ｌ8 （ｄｉ／ｄｔ） ＝８Ｌ（ｄｉ／ｄｔ） ＝８×２．７（Ｈ）×５（Ａ／ｓｅｃ） ＝１０８（Ｖ）である。As shown in FIG. 7, time t when the power supply current is 0
The output voltage is about 110V from 11 to time t 12 when it reaches about 500A. That is, in the superconducting magnet shown in FIG.
During excitation, most of the power supply current flows to the superconducting coil side, and the output voltage V is V = L 1 (di / dt) + L 2 (di / dt) + ... + L 8 (di / dt) = 8L (di /Dt)=8×2.7(H)×5(A/sec)=108(V).
【００２４】図８は超電導磁石の正常時の消磁時の出力
電圧を示す図である。この図に示すように、電源電流が
０の時点ｔ21から約５００Ａに達する時点ｔ 23までの出
力電圧は永久電流スイッチＰＣＳが閉じているので０で
あり、この時点ｔ23で永久電流スイッチＰＣＳが開か
れ、徐々に電源電流が減らされていき、時点ｔ24で電源
電流は０となる。その場合、時点ｔ23から徐々に−方向
に出力電圧Ｖ（逆起電力による電圧）が生じて、その電
圧は−Ｖ約１００Ｖとなる。なお、消磁時には永久電流
スイッチＰＣＳに並列に接続される保護抵抗Ｒ１〜Ｒ８
へも電流が流れることになる。FIG. 8 shows the output when the superconducting magnet is demagnetized under normal conditions.
It is a figure which shows a voltage. As shown in this figure,
Time t 0twenty oneFrom time t to about 500A twenty threeUp to
The output voltage is 0 because the permanent current switch PCS is closed.
Yes, at this time ttwenty threePermanent current switch PCS opens with
The power supply current is gradually reduced at time ttwenty fourPower on
The current becomes zero. In that case, time ttwenty threeGradually from-direction
Output voltage V (voltage due to back electromotive force) is generated at
The pressure becomes -V about 100V. When degaussing, the permanent current
Protection resistors R1 to R8 connected in parallel to the switch PCS
Current will also flow to.
【００２５】次に、本発明の異常時の出力電圧について
説明する。 （１）励消磁時、永久電流スイッチＰＣＳが開いている
時にコイルクエンチが発生した場合は、コイルクエンチ
で発生した抵抗（数Ω）×電源電流による発生電圧が、
励磁電源の基準電圧（過電圧検知設定値）（±３００
Ｖ）以上となる。 （２）励消磁時、永久電流スイッチＰＣＳが閉じている
時にコイルクエンチが発生した場合は、本発明により、
クエンチ検知とともに永久電流スイッチＰＣＳを開く
と、コイルクエンチで発生した抵抗（数Ω）×電源電流
による発生電圧が励磁電源の基準電圧（過電圧検知設定
値）（±３００Ｖ）以上となる。Next, the output voltage at the time of abnormality of the present invention will be described. (1) During excitation / demagnetization, if a coil quench occurs when the permanent current switch PCS is open, the resistance (several Ω) generated by the coil quench × the voltage generated by the power supply current is
Excitation power supply reference voltage (overvoltage detection set value) (± 300
V) or more. (2) When a coil quench occurs when the permanent current switch PCS is closed during excitation / demagnetization, according to the present invention,
When the permanent current switch PCS is opened simultaneously with the detection of the quench, the voltage generated by the resistance (several Ω) generated by the coil quench × the power supply current becomes equal to or higher than the reference voltage (overvoltage detection set value) (± 300 V) of the excitation power supply.
【００２６】なお、本発明は上記実施例に限定されるも
のではなく、本発明の趣旨に基づいて種々の変形が可能
であり、これらを本発明の範囲から排除するものではな
い。It should be noted that the present invention is not limited to the above embodiment, and various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.
【００２７】[0027]
【発明の効果】以上、詳細に説明したように、本発明に
よれば、超電導磁石の超電導コイルを励消磁するため外
部から超電導コイルに電流を通電している時にコイルク
エンチが発生した場合には、そのコイルクエンチを検出
し、地上に設置されている励磁電源装置でもって電源電
流を遮断し、超電導コイル通電線の焼損を的確に防止す
ることができる。As described above in detail, according to the present invention, when a coil quench occurs while a current is externally applied to the superconducting coil in order to demagnetize the superconducting coil of the superconducting magnet, The coil quench is detected, and the power supply current is cut off by the excitation power supply device installed on the ground, so that the burnout of the superconducting coil energizing wire can be accurately prevented.
【図１】本発明の実施例を示す超電導コイル通電線の保
護方式の構成図である。FIG. 1 is a configuration diagram of a superconducting coil current-carrying wire protection system according to an embodiment of the present invention.
【図２】従来の超電導磁気浮上式鉄道における超電導磁
石の励消磁システムの構成図である。FIG. 2 is a configuration diagram of an excitation / demagnetization system of a superconducting magnet in a conventional superconducting magnetic levitation railway.
【図３】超電導コイル通電線の溶断の説明図である。FIG. 3 is an explanatory view of melting of a superconducting coil current-carrying wire.
【図４】超電導コイル通電状態と溶断の説明図（その
１）である。FIG. 4 is an explanatory view (No. 1) of energization state of the superconducting coil and fusing.
【図５】超電導コイル通電状態と溶断の説明図（その
２）である。FIG. 5 is an explanatory view (No. 2) of energization state of the superconducting coil and fusing.
【図６】本発明の具体例を示す超電導磁石の電気回路図
である。FIG. 6 is an electric circuit diagram of a superconducting magnet showing a specific example of the present invention.
【図７】超電導磁石の正常時の励磁時の出力電圧を示す
図である。FIG. 7 is a diagram showing an output voltage when a superconducting magnet is normally excited.
【図８】超電導磁石の正常時の消磁時の出力電圧を示す
図である。FIG. 8 is a diagram showing an output voltage when the superconducting magnet is normally demagnetized.
１１，３０ 励磁電源装置 １２，３３ 励磁電源 １３，３２ 遮断器 １４ 比較部 １５ 過電圧検出装置 ２１ 超電導磁石制御装置（車両内に搭載） ２２ 超電導磁石 ２３ 異常電圧検出用配線 ２４ 永久電流スイッチ制御線 ２５ 超電導コイル通電線 ３１ メーターリレー Ｃ１〜Ｃ４ 超電導コイル ＰＣＳ 永久電流スイッチ（Ｐ１〜Ｐ８） Ｔ 異常電圧検出タップ Ｈ ヒーター Ｒ１〜Ｒ８ 保護抵抗 Ｄ１〜Ｄ８ ダイオード 11,30 Excitation power supply device 12,33 Excitation power supply 13,32 Circuit breaker 14 Comparison unit 15 Overvoltage detection device 21 Superconducting magnet control device (mounted in vehicle) 22 Superconducting magnet 23 Abnormal voltage detection wiring 24 Permanent current switch control line 25 Superconducting coil energizing wire 31 Meter relay C1 to C4 Superconducting coil PCS Persistent current switch (P1 to P8) T Abnormal voltage detection tap H Heater R1 to R8 Protection resistance D1 to D8 Diode
Claims (2)
載される超電導磁石制御装置とを備え、超電導コイルを
励消磁するため外部から超電導コイルに電流を通電して
いる時にコイルクエンチが発生した場合における超電導
コイル通電線の保護方法において、 前記超電導コイルに設けられる異常電圧検出タップにお
ける異常電圧に基づいてコイルクエンチを検出すると、
前記超電導コイルと並列に接続される永久電流スイッチ
を開にし、超電導コイル通電線を介して過電圧検出を行
い、該過電圧が所定電圧を超えると、遮断器を動作させ
て電源電流を遮断することを特徴とする超電導コイル通
電線の保護方法。1. A coil quench is generated when an electric current is supplied to the superconducting coil from the outside in order to demagnetize the superconducting coil, which comprises an exciting power source arranged on the ground and a superconducting magnet control device mounted on the vehicle. In the method of protecting the superconducting coil conducting wire in the case of, when detecting the coil quench based on the abnormal voltage in the abnormal voltage detection taps provided in the superconducting coil,
The permanent current switch connected in parallel with the superconducting coil is opened, overvoltage detection is performed through the superconducting coil energizing wire, and when the overvoltage exceeds a predetermined voltage, the circuit breaker is operated to interrupt the power supply current. A method of protecting the superconducting coil current conductor.
載される超電導磁石制御装置とを備え、超電導コイルを
励消磁するため外部から超電導コイルに電流を通電して
いる時にコイルクエンチが発生した場合における超電導
コイル通電線の保護装置において、（ａ）前記超電導コ
イルに設けられる異常電圧検出タップと、（ｂ）該異常
電圧検出タップにおける異常電圧に基づいて超電導コイ
ルと並列に接続される永久電流スイッチを開にする制御
手段と、（ｃ）超電導コイル通電線を介して過電圧を検
出する過電圧検出手段と、（ｄ）該過電圧検出手段の出
力電圧と所定電圧とを比較する比較手段と、（ｅ）該比
較手段により、前記出力電圧が所定電圧を超えると、電
源電流を遮断する遮断器とを具備する超電導コイル通電
線の保護装置。2. A coil quench is generated when an electric current is supplied to the superconducting coil from the outside in order to demagnetize the superconducting coil, which comprises an exciting power source arranged on the ground and a superconducting magnet control device mounted on the vehicle. In the protection device for the superconducting coil energization wire in such a case, (a) an abnormal voltage detection tap provided on the superconducting coil, and (b) a permanent connection connected in parallel with the superconducting coil based on the abnormal voltage at the abnormal voltage detection tap. Control means for opening the current switch, (c) overvoltage detection means for detecting an overvoltage via the superconducting coil energizing wire, (d) comparison means for comparing the output voltage of the overvoltage detection means with a predetermined voltage, (E) A protection device for a superconducting coil energizing wire, comprising a circuit breaker for interrupting a power supply current when the output voltage exceeds a predetermined voltage by the comparing means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7201196A JP3419986B2 (en) | 1996-03-27 | 1996-03-27 | Superconducting coil energizing wire protection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7201196A JP3419986B2 (en) | 1996-03-27 | 1996-03-27 | Superconducting coil energizing wire protection method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09260130A true JPH09260130A (en) | 1997-10-03 |
| JP3419986B2 JP3419986B2 (en) | 2003-06-23 |
Family
ID=13477054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7201196A Expired - Fee Related JP3419986B2 (en) | 1996-03-27 | 1996-03-27 | Superconducting coil energizing wire protection method and device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3419986B2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11204325A (en) * | 1997-10-24 | 1999-07-30 | Sumitomo Electric Ind Ltd | Method for controlling operation of superconducting coil |
| US6359365B1 (en) * | 2000-08-04 | 2002-03-19 | American Superconductor Corporation | Superconducting synchronous machine field winding protection |
| JP2002217021A (en) * | 2001-01-15 | 2002-08-02 | Central Japan Railway Co | Superconducting magnet protective unit |
| US7504826B2 (en) | 2006-07-31 | 2009-03-17 | Mitsubishi Electric Corporation | Superconducting magnet and MRI apparatus using the same |
| JP2009124158A (en) * | 1997-10-24 | 2009-06-04 | Sumitomo Electric Ind Ltd | Method for controlling operation of superconducting coil |
| GB2456308A (en) * | 2008-01-09 | 2009-07-15 | Gen Electric | Actively controlling Quench Protection of a Superconducting Magnet |
| US7615998B2 (en) | 2007-01-09 | 2009-11-10 | General Electric Company | Method and apparatus for actively controlling quench protection of a superconducting magnet |
| JP2009267189A (en) * | 2008-04-28 | 2009-11-12 | Japan Superconductor Technology Inc | Superconducting magnet, and magnet device provided with the same |
| JP2010147395A (en) * | 2008-12-22 | 2010-07-01 | Railway Technical Res Inst | Superconductive magnet device |
| JP2010161398A (en) * | 2010-03-03 | 2010-07-22 | Railway Technical Res Inst | Superconducting magnet protective unit |
| US7898778B2 (en) | 2005-04-19 | 2011-03-01 | Kabushiki Kaisha Toshiba | Superconducting coil quench detection method and device, and superconducting power storage unit |
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1996
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009124158A (en) * | 1997-10-24 | 2009-06-04 | Sumitomo Electric Ind Ltd | Method for controlling operation of superconducting coil |
| JP4720902B2 (en) * | 1997-10-24 | 2011-07-13 | 住友電気工業株式会社 | Superconducting coil operation control method |
| JP2011091422A (en) * | 1997-10-24 | 2011-05-06 | Sumitomo Electric Ind Ltd | Operation control method for superconducting coil |
| JPH11204325A (en) * | 1997-10-24 | 1999-07-30 | Sumitomo Electric Ind Ltd | Method for controlling operation of superconducting coil |
| US6359365B1 (en) * | 2000-08-04 | 2002-03-19 | American Superconductor Corporation | Superconducting synchronous machine field winding protection |
| JP2002217021A (en) * | 2001-01-15 | 2002-08-02 | Central Japan Railway Co | Superconducting magnet protective unit |
| JP4580561B2 (en) * | 2001-01-15 | 2010-11-17 | 財団法人鉄道総合技術研究所 | Superconducting magnet protector |
| US7898778B2 (en) | 2005-04-19 | 2011-03-01 | Kabushiki Kaisha Toshiba | Superconducting coil quench detection method and device, and superconducting power storage unit |
| US7504826B2 (en) | 2006-07-31 | 2009-03-17 | Mitsubishi Electric Corporation | Superconducting magnet and MRI apparatus using the same |
| US7876100B2 (en) | 2007-01-09 | 2011-01-25 | General Electric Company | Method and apparatus for actively controlling quench protection of a superconducting magnet |
| US7615998B2 (en) | 2007-01-09 | 2009-11-10 | General Electric Company | Method and apparatus for actively controlling quench protection of a superconducting magnet |
| GB2456308B (en) * | 2008-01-09 | 2011-01-26 | Gen Electric | Method and apparatus for actively controlling quench protection of a superconducting magnet |
| GB2456308A (en) * | 2008-01-09 | 2009-07-15 | Gen Electric | Actively controlling Quench Protection of a Superconducting Magnet |
| JP2009267189A (en) * | 2008-04-28 | 2009-11-12 | Japan Superconductor Technology Inc | Superconducting magnet, and magnet device provided with the same |
| JP2010147395A (en) * | 2008-12-22 | 2010-07-01 | Railway Technical Res Inst | Superconductive magnet device |
| JP2010161398A (en) * | 2010-03-03 | 2010-07-22 | Railway Technical Res Inst | Superconducting magnet protective unit |
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