JPH01286735A - Current limiting device - Google Patents
Current limiting deviceInfo
- Publication number
- JPH01286735A JPH01286735A JP63115916A JP11591688A JPH01286735A JP H01286735 A JPH01286735 A JP H01286735A JP 63115916 A JP63115916 A JP 63115916A JP 11591688 A JP11591688 A JP 11591688A JP H01286735 A JPH01286735 A JP H01286735A
- Authority
- JP
- Japan
- Prior art keywords
- current
- line
- shunt
- wire
- shunt circuit
- 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
- 230000000670 limiting effect Effects 0.000 title claims abstract description 48
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 239000000919 ceramic Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 22
- 238000010791 quenching Methods 0.000 abstract description 13
- 230000000171 quenching effect Effects 0.000 abstract 2
- 239000002887 superconductor Substances 0.000 description 18
- 230000007704 transition Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 229910052788 barium Inorganic materials 0.000 description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000005347 demagnetization Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 229910052746 lanthanum Inorganic materials 0.000 description 3
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052574 oxide ceramic Inorganic materials 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野〕
本発明は、電力系統の線路に設備して線路に定格を越え
る過大電流が流れた場合にその過大電流の流れを遮断し
、過大電流の消滅後に線路の通電を再開する限流装置に
関する。[Detailed Description of the Invention] (Field of Industrial Application) The present invention is installed on the lines of a power system to interrupt the flow of excessive current when an excessive current exceeding the rating flows through the line. The present invention relates to a current limiting device that restarts energization of a line after extinction.
一般に電力系統は、電力の発生から消費までを一括した
系統で、すなわち発電所において発電し、これを送電線
によって送電し、さらに配電線を利用して方々の工場や
家庭に配電し、負荷機器に至るまでを一括した系統をい
う、送電線によって輸送された電力は送電電圧のままで
、いきなり需要家に供給することはできないから、それ
までには幾日か需要負荷に都合のよい電圧に逓降しなけ
ればならない。In general, an electric power system is a system that integrates everything from generation to consumption of electric power, that is, it generates electricity at a power plant, transmits it through transmission lines, and then distributes it to factories and homes using distribution lines, and then distributes it to the load equipment. Electric power transported by transmission lines cannot be suddenly supplied to consumers at the same transmission voltage, so it takes several days before the voltage changes to a level that is convenient for the demand load. have to descend.
網状に接続された電力系統においては、もし線路のどこ
かに事故が発生すると、その影響はたちまち全地域に波
及する。従って、たとえ事故が発生しても、その影響を
局部的に抑制して他への波及を未然に防ぐことが保守保
安上、また電力を不断に供給する上からも、極めて大切
である。In a grid-connected power system, if an accident occurs somewhere along the lines, the effects will immediately spread to the entire region. Therefore, even if an accident occurs, it is extremely important to suppress its effects locally and prevent it from spreading to other areas, from the standpoint of maintenance and safety, as well as from the standpoint of ensuring a constant supply of power.
送電線路に発生する事故の種類は千種万様であるが、雷
撃に伴う異常電圧の発生と線路の短絡及び地絡によって
流れる過大電流である。これがために異常電圧に対して
は送電線に架空地線や埋設地線を設置して線路を保護し
、また発電所や変電所では線路の引込口または引出口の
付近に各種の避雷器を取付け、異常電圧波が襲来する七
−時的に接地してこれを大地に導き、電気施設の絶縁破
壊を防止することに努めている。また電線路が断線や接
触によって短絡または地絡すると、故障位置に強大な電
流が流れて回路中の電気機器を焼損するので、このよう
な不時の事態に備えるための措置として線路の一定区間
毎に限流線を設ける場合がある。これは、大電流が線路
に流れると同時に限流線の限流作用によって故障区間を
切り離して電流を遮断し、事故の影響が波及するのを未
然に防ぐためである。There are many types of accidents that occur on power transmission lines, but they include abnormal voltage generation due to lightning strikes, and excessive current flowing due to line short circuits and ground faults. For this reason, to protect against abnormal voltages, overhead ground wires or buried ground wires are installed on power transmission lines to protect the lines, and various types of lightning arresters are installed near the entrances or exits of the lines at power plants and substations. When abnormal voltage waves attack, we conduct grounding to guide them to the earth in an effort to prevent dielectric breakdown in electrical facilities. In addition, if a power line is short-circuited or grounded due to disconnection or contact, a strong current will flow to the fault location and burn out the electrical equipment in the circuit, so as a measure to prepare for such an unexpected situation, certain sections of the line A current limiting line may be provided for each area. This is to prevent the effects of an accident from spreading by cutting off the faulty section and cutting off the current by the current-limiting action of the current-limiting wire at the same time that a large current flows through the line.
そのような限流線としては、通常は限流作用を有する導
体の周囲に絶縁被覆を被せて電線として構成したもの、
金属系超電導材料からなる超電導線、或いは本発明者が
提案するセラミックス系超電導材料からなる超電導線が
ある。Such current-limiting wires are usually constructed as electric wires by covering a conductor with a current-limiting function with an insulating coating,
There are superconducting wires made of metal-based superconducting materials and superconducting wires made of ceramic-based superconducting materials proposed by the present inventors.
このうち常電導体である電線は別として、金属系または
セラミックス系超電導材料からなる超電導線は、平常時
はその超電導状態により電気抵抗が全くなく電流を損失
なく流すが、事故時の大電流により短時間に超電導体か
ら非超電導体に移行して限流作用を行うことが特徴であ
る。すなわち、線路の許容電流に応じて予め設定した超
電導線の臨界電流（たとえば配電系統の線路の本線の場
合は電圧６００ Ｖで許容電流２万Ａだから臨界電流は
２万Ａ）以上に事故電流が達すると、超電導線はその超
電導相が破壊して超電導体から非超電導体に短時間に移
行して大電流を遮断する。Of these, apart from electric wires that are normal conductors, superconducting wires made of metal or ceramic superconducting materials have no electrical resistance at all due to their superconducting state and allow current to flow without loss during normal times, but due to large currents in the event of an accident, It is characterized by a transition from a superconductor to a non-superconductor in a short period of time to perform a current limiting action. In other words, if the fault current exceeds the critical current of the superconducting line, which is preset according to the line's allowable current (for example, in the case of the main line of a distribution system line, the voltage is 600 V and the allowable current is 20,000 A, so the critical current is 20,000 A). When this happens, the superconducting phase of the superconducting wire breaks down, transitioning from a superconductor to a non-superconductor in a short period of time, cutting off the large current.
セラミックス系超電導材料からなる限流線は、セラミッ
クス材料の本来の特性である高電気抵抗体すなわち非超
電導体と超電導体の両方の特性を活用するもので、金属
系超電導材料からなる限流線よりも優秀な限流作用を有
している。Current-limiting wires made of ceramic-based superconducting materials utilize the inherent characteristics of ceramic materials as high electrical resistors, that is, as both non-superconductors and superconductors. It also has an excellent current limiting effect.
ところで、一般にセラミックス系超電導材料からなる超
電導線は臨界電流よりも大きい過大電流によって超電導
状態が破壊し、短時間に超電導体全体が常電導体になる
クエンチ現象を呈する。しかしながら、超電導線がクエ
ンチ状態に移行する時に超電導体は一般に高抵抗を示し
、この高抵抗によりジュール熱を発生し、ついには超電
導線が焼き切れて再使用不能になる恐れがある。By the way, in general, a superconducting wire made of a ceramic superconducting material exhibits a quench phenomenon in which the superconducting state is destroyed by an excessive current larger than the critical current, and the entire superconductor becomes a normal conductor in a short time. However, when the superconducting wire transitions to the quench state, the superconductor generally exhibits high resistance, and this high resistance generates Joule heat, which may eventually burn out the superconducting wire and make it unusable.
そのため、セラミックス系超電導材料からなる超電導線
を限流線として使用した場合には、過大電流によって超
電導線がクエンチ状態になっても焼き切れないような処
置を施しておくことが望ましい。Therefore, when a superconducting wire made of a ceramic superconducting material is used as a current limiting wire, it is desirable to take measures to prevent the wire from burning out even if the superconducting wire becomes quenched due to excessive current.
また、産業の発展と共に需要負荷が増大すれば、電源の
開発、施設の増強によって電力系統は次第に規模を拡大
し、かつ複雑化する。電気事業者が良質の電気を豊富、
低廉に供給できるためには、この電力系統全体が常に合
理的かつ経済的に運用されなければならず、負荷に供給
される電気の総合コストを最小にすることが肝要である
。Furthermore, as the demand load increases with the development of industry, the power system will gradually expand in scale and become more complex due to the development of power sources and the reinforcement of facilities. Electricity companies provide an abundance of high-quality electricity,
In order to be able to supply electricity at a low cost, the entire power system must always be operated rationally and economically, and it is essential to minimize the total cost of electricity supplied to the loads.
この立場から、超電導線を限流線として使用した限流装
置の場合もそのコストをできるだけ低減することが望ま
れる。特に限流装置に遮断器を併用している場合は遮断
器が装置の大型化かつコスト高の一つの要因になってお
り、限流装置の小型化、設置スペースを少なくすること
、また低コスト化を図ることが要望される。From this standpoint, it is desirable to reduce the cost as much as possible in the case of current limiting devices that use superconducting wires as current limiting wires. Especially when a circuit breaker is used in conjunction with a current limiting device, the circuit breaker is one of the factors that increases the size and cost of the device. It is requested that efforts be made to
従って本発明の目的は、以上の点を鑑みてセラミックス
系超電導材料からなる超電導線を限流線として使用し、
大電流によって限流線がクエンチ状態に移行しても焼き
切れる危険がなく、しかも小型化かつ低コスト化を実現
した限流装置を提供することにある。Therefore, in view of the above points, an object of the present invention is to use a superconducting wire made of ceramic superconducting material as a current limiting wire,
To provide a current limiting device which does not have the risk of being burnt out even if the current limiting line shifts to a quench state due to a large current, and which is miniaturized and reduced in cost.
上記目的を達成するために、本発明の限流装置は、セラ
ミックス系超電導材料からなる超電導線を限流線として
使用し、大電流によって超電導線が超電導体からクエン
チ状態に移行した時に電流を迂回させるバイパスである
分流回路を有し、分波回路によって電流を負荷機器に損
傷を与えない程度にまで抑制する。In order to achieve the above object, the current limiting device of the present invention uses a superconducting wire made of ceramic superconducting material as a current limiting wire, and bypasses the current when the superconducting wire transitions from a superconductor to a quench state due to a large current. It has a shunt circuit that acts as a bypass to prevent the current from damaging the load equipment.
すなわち限流装置は、セラミックス系超電導材料からな
る超電導線を備え、超電導線に並列に分流回路を設け、
分流回路が抵抗と、該抵抗の下流側に設けた分流回路に
流れる電流を遮断する分流回路遮断器と、分流回路に流
れる電流を検出する分流電流検出機構とを有し、超電導
線の下流側に線路を流れる電流を検出する線路電流検出
機構及び線路を流れる電流を遮断する線路遮断器を取付
け、分流電流検出機構によって検出された分流電流が所
定値を越えれば分流回路遮断器を作動させて分流電流を
遮断し、線路電流検出機構によって検出された線路電流
の通電・遮断の繰り返し回数が指定回数に達すれば線路
遮断器を作動させて線路電流を遮断するようにした制御
器を備えることを特徴とする。In other words, the current limiting device includes a superconducting wire made of ceramic superconducting material, a shunt circuit is provided in parallel to the superconducting wire,
The shunt circuit includes a resistor, a shunt circuit breaker that cuts off the current flowing in the shunt circuit provided downstream of the resistor, and a shunt current detection mechanism that detects the current flowing in the shunt circuit, and A line current detection mechanism that detects the current flowing through the line and a line breaker that interrupts the current flowing through the line are installed on the line, and if the shunt current detected by the shunt current detection mechanism exceeds a predetermined value, the shunt circuit breaker is activated. A controller is provided that interrupts the shunt current and operates a line breaker to interrupt the line current when the number of repeated energization and interruptions of the line current detected by the line current detection mechanism reaches a specified number of times. Features.
限流装置は、平常時には超電導線が超電導状態であって
電送損失がなく、事故による大電流が流れると過大電流
によってその超電導相が破壊されるため超電導線がクエ
ンチ状態に短時間に移行する。超電導線のクエンチ状態
への移行と同時に、分流回路に電流が流れ、該分流回路
に設けた抵抗によって過大電流を絞る。In a current limiting device, the superconducting wire is in a superconducting state under normal conditions and there is no transmission loss, but when a large current flows due to an accident, the superconducting phase is destroyed by the excessive current, and the superconducting wire quickly shifts to the quench state. Simultaneously with the transition of the superconducting wire to the quench state, current flows through the shunt circuit, and the excessive current is throttled by a resistor provided in the shunt circuit.
本発明の限流装置に限流線として用いる超電導線のセラ
ミックス系超電導材料には特に制限はなく、たとえば希
土類元素を含む酸化物のセラミックス材料としてはバリ
ウム・イツトリウム・銅・酸素、バリウム・ランタン・
銅・酸素、ストロンチウム・ランタン・銅・酸素、バリ
ウム・スカンジウム・銅・酸素、カルシウム・ランタン
・銅・酸素を組成とするセラミックスなどで、希土類元
素を含まない酸化物のセラミックス材料ではビスマス・
ストロンチウム・カルシウム・銅・酸素を組成とするセ
ラミックスが例示される。There are no particular restrictions on the ceramic superconducting material of the superconducting wire used as the current limiting wire in the current limiting device of the present invention. For example, oxide ceramic materials containing rare earth elements include barium, yttrium, copper, oxygen, barium, lanthanum,
Ceramics whose compositions include copper/oxygen, strontium/lanthanum/copper/oxygen, barium/scandium/copper/oxygen, calcium/lanthanum/copper/oxygen, and oxide ceramic materials that do not contain rare earth elements include bismuth,
Ceramics whose composition is strontium, calcium, copper, and oxygen are exemplified.
なお超電導線の製法は、上記セラミックス系超電導材料
を使用し、線引などの常套手段で行えばよいが、超電導
線の超電導相が破壊して超電導線が超電導体からクエン
チ状態に移行する時の臨界電流を適宜設定する必要があ
る。たとえば電力系統のうちで特に需要家に直結して電
力を供給する部分である配電系統の本線では、本線の定
格電流６００Ａで遮断電流２万Ａである。換言すると本
線には２万Ａの時に臨界電流となって超電導体からクエ
ンチ状態に移行して限流作用が現出するような断面積の
超電導線を使用する。The superconducting wire can be manufactured using the above-mentioned ceramic superconducting material and using conventional methods such as wire drawing, but when the superconducting phase of the superconducting wire is destroyed and the superconducting wire transitions from a superconductor to a quenched state, It is necessary to set the critical current appropriately. For example, in the main line of a power distribution system, which is a part of the power system that is directly connected to supply electricity to consumers, the rated current of the main line is 600 A and the breaking current is 20,000 A. In other words, a superconducting wire with a cross-sectional area such that at 20,000 A, a critical current is generated, the superconductor shifts to a quench state, and a current-limiting action appears.
以下、本発明の限流装置を実施例に基づいて説明する。 EMBODIMENT OF THE INVENTION Hereinafter, the current limiting device of this invention is demonstrated based on an Example.
第１図は一例の限流装置ｆＤＶを電力系統の線路３０に
設備したものである。限流装置ＤＶは、セラミックス系
超電導材料からなる超電導線すなわち限流線Ｇと、限流
線Ｇに並列に設けた分流回路を構成する分流抵抗器Ｒ１
分流抵抗器Ｒの下流側に取付けた分流回路に流れる電流
を遮断する分流回路遮断器１、及び分流回路に流れる電
流を検出する分流電流検出機構２と、ｐＩ流線Ｇの下流
側に取付けた線路３０を流れる電流を検出する線路電流
検出機構３及び線路３０を流れる電流を遮断する線路遮
断器４とを備える。さらに限流装置ＤＶは、分流電流検
出機構２によって検出された分流電流が所定値（負荷機
器に損傷を与えない程度の電流値）を越えれば分流回路
遮断器１を作動させて分流電流を遮断すると共に、線路
電流検出機構３によって検出された線路電流の通電・遮
断の繰り返し回数が指定回数に達すれば線路遮断器４を
作動させて線路電流を遮断するようにした制御器５を備
える０図からも明らかな如く、制御器５による遮断器１
の作動はコイル６の励磁・消磁によって、また遮断器４
の作動はコイル７の励磁・消磁によって行われる０分流
電流検出機構２、線路電流検出機構３及びコイル６．７
は、検出機構２．３の検出信号が制御器５に送られ、コ
イル６．７を励磁・消磁させるための制御信号が制御器
５からコイル６．７にそれぞれ伝達されるように各々制
御器５に連絡している。FIG. 1 shows an example of a current limiting device fDV installed on a line 30 of a power system. The current limiting device DV includes a superconducting wire made of ceramic superconducting material, that is, a current limiting line G, and a shunt resistor R1 that constitutes a shunt circuit provided in parallel with the current limiting line G.
A shunt circuit breaker 1 that cuts off the current flowing in the shunt circuit installed downstream of the shunt resistor R, a shunt current detection mechanism 2 that detects the current flowing in the shunt circuit, and a shunt current detection mechanism 2 installed downstream of the pI flow line G. It includes a line current detection mechanism 3 that detects the current flowing through the line 30 and a line breaker 4 that interrupts the current flowing through the line 30. Furthermore, the current limiter DV operates the shunt circuit breaker 1 to interrupt the shunt current if the shunt current detected by the shunt current detection mechanism 2 exceeds a predetermined value (a current value that does not damage the load equipment). In addition, a controller 5 is provided which operates a line breaker 4 to interrupt the line current when the number of repetitions of energization and interruption of the line current detected by the line current detection mechanism 3 reaches a specified number of times. As is clear from the above, the circuit breaker 1 by the controller 5
is activated by the excitation and demagnetization of the coil 6, and by the activation and demagnetization of the circuit breaker 4.
The operation is performed by excitation and demagnetization of the coil 7.The zero branch current detection mechanism 2, the line current detection mechanism 3, and the coil 6.7
The controllers are configured such that the detection signal of the detection mechanism 2.3 is sent to the controller 5, and the control signal for exciting and demagnetizing the coil 6.7 is transmitted from the controller 5 to the coil 6.7. I am contacting 5.
限流線Ｇは、セラミックス系超電導材料のもつ臨界温度
により異なるが超電導状態を維持するために、冷却媒体
（たとえば液体窒素）を入れである冷却槽ｌＯ内に収容
されて常時冷却されている。Although the current limiting line G varies depending on the critical temperature of the ceramic superconducting material, in order to maintain a superconducting state, the current limiting line G is housed in a cooling tank IO containing a cooling medium (for example, liquid nitrogen) and is constantly cooled.
ここにおいて、限流線Ｇは通常は冷却槽１０内の冷却媒
体中に入れであるので限流線Ｇを水から防護するための
防水層を限流線Ｇに特に設ける必要はないが、冷却媒体
によって冷却しない常温中で使用する場合などは防水層
を設けておくことが望ましい。Here, since the current-limiting line G is usually placed in a cooling medium in the cooling tank 10, there is no need to provide a waterproof layer on the current-limiting line G to protect the current-limiting line G from water. It is desirable to provide a waterproof layer when using at room temperature without cooling with a medium.
かかる限流装置ＤＶは、前述した如く、線路が断線や接
触などによって短絡または地絡すると、故障位置に強大
な電流が流れて回路中の電気機器を焼損するなどの大き
な被害を及ぼすので、大電流を限流作用によって自動的
かつ速やかに遮断して故障区間を健全な回路から切り離
すためのものである。従って、限流装置ＤＶは線路３０
の一定区間毎に設備して使用する。As mentioned above, such a current limiting device DV should be used in a serious manner because if the line is short-circuited or grounded due to disconnection or contact, a strong current will flow to the fault location and cause major damage such as burning out electrical equipment in the circuit. This is to automatically and quickly cut off the current by current limiting and to isolate the faulty section from the healthy circuit. Therefore, the current limiter DV is connected to the line 30
It is installed and used for each fixed section of the road.
このような限流装置ＤＶでは、平常時には限流線Ｇは超
電導体であり、電気抵抗が０であるためジュール熱の発
生がなく、従って電送損失が全くない、またこの時、電
流■はバイパスである分流回路には該分流回路が抵抗器
Ｒを有しているため流れることはない。In such a current limiting device DV, under normal conditions, the current limiting line G is a superconductor and the electrical resistance is 0, so no Joule heat is generated, so there is no transmission loss. Since the shunt circuit has a resistor R, no current flows through the shunt circuit.
ここで何らかの原因により線路に短絡や地絡などの異常
が発生して大電流が線路３０を通じて限流線Ｇに流れる
と、短時間に限流線Ｇが超電導体からクエンチ状態に移
行し、限流線Ｇを電流が流れなくなると同時に電流は分
流回路に流れる。この際、分流回路が抵抗器Ｒを有する
ため抵抗器Ｒによって負荷機器が焼損するなどの不具合
が生じない程度にまで電流が十分に絞られ、過大電流が
一度に流れるようなことはない、同時に、分流電流検出
機構２により分流電流を検出し、検出電流が分流回路遮
断器１の遮断を要する所定値を越えたら、制御器５によ
ってコイル６を励磁させて遮断器１を作動させ、分流回
路を開状態にして分流電流を遮断する。電流が絞られる
間に発生事故が除去され且つ限流線Ｇが超電導体に復帰
すれば、限流線Ｇからの通常の通電に戻る。If an abnormality such as a short circuit or ground fault occurs in the line for some reason and a large current flows through the line 30 to the current limiting line G, the current limiting line G shifts from a superconductor to a quench state in a short time, and At the same time as the current stops flowing through the streamline G, the current flows into the shunt circuit. At this time, since the shunt circuit has a resistor R, the current is sufficiently restricted by the resistor R to the extent that problems such as burnout of the load equipment do not occur, and an excessive current does not flow all at once. , a shunt current is detected by the shunt current detection mechanism 2, and when the detected current exceeds a predetermined value that requires the shunt circuit breaker 1 to be shut off, the controller 5 excites the coil 6 to operate the circuit breaker 1, and the shunt circuit breaker 1 is activated. Open the circuit to cut off the shunt current. If the fault that has occurred is removed while the current is being throttled and the current limiting line G returns to the superconductor state, normal current flow from the current limiting line G returns.
通電中断時に事故が取り除かれない場合に、限流線Ｇが
超電導体に復帰すると限流１ｓＧは過大電流によって再
びクエンチ状態になり、事故が１！続している限り限流
線Ｇが超電導体とクエンチ状態への移行を繰り返すこと
になる。この繰り返し回数、すなわち線路３０の通電・
遮断回数を線路ｔｉ流検出機構３によって検出し、検出
回数が予め設定した指定回数（たとえば２回程度）に達
したら、制御器５によってコイル６を励磁させて遮断器
ｌを作動させ、遮断器１を開状態にして分流電流を遮断
すると共に、限流線Ｇがクエンチ状態でコイル７を励磁
させて遮断器４を作動させ、遮断器４を開状態にして線
路電流を遮断する。事故の復旧作業中に限流線Ｇが超電
導体に移行しているので事故復旧が完了すれば、制御器
５によって遮断器１．４を閉状態にして線路３０の通電
を再開すればよい。If the fault is not removed when the current is interrupted, and the current-limiting wire G returns to the superconductor, the current-limiting current 1sG becomes quenched again due to the excessive current, and the fault is 1! As long as it continues, the current limiting line G will repeat the transition to the superconductor and the quench state. The number of times this is repeated, that is, the energization of the line 30
The number of interruptions is detected by the line ti current detection mechanism 3, and when the number of detections reaches a preset specified number (for example, about two times), the controller 5 excites the coil 6 to operate the circuit breaker l, and the circuit breaker is activated. 1 to an open state to interrupt the shunt current, and at the same time, the current limiting line G is in a quenched state to excite the coil 7 to operate the circuit breaker 4, and to open the circuit breaker 4 to interrupt the line current. Since the current limiting line G is transferred to the superconductor during the accident recovery work, once the accident recovery is completed, the circuit breaker 1.4 is closed by the controller 5 and the line 30 is energized again.
本発明は上記実施例に限定されるものではなく、本発明
の目的を逸脱しない限り他の態様を採用してもよいこと
はいうまでもない。It goes without saying that the present invention is not limited to the above embodiments, and other embodiments may be adopted as long as they do not depart from the purpose of the present invention.
本発明の限流装置は、以上説明したように構成されてい
るので、以下に記載されるような効果を奏する。Since the current limiting device of the present invention is configured as described above, it produces the effects described below.
セラミックス系超電導材料からなる超電導線を限流線と
して使用し、かつ限流線が過大電流によって超電導体か
らクエンチ状態に移行した時に電流を迂回させると共に
絞るためのバイパスである分流回路を設けたから、クエ
ンチ状態への移行時に限流線の高抵抗特性によって限流
線が焼き切れるようなことがない。A superconducting wire made of ceramic superconducting material is used as the current limiting wire, and a shunt circuit is provided as a bypass to divert and throttle the current when the current limiting wire transitions from the superconductor to the quench state due to excessive current. During transition to the quench state, the current limiting line will not burn out due to its high resistance characteristics.
また、分流回路で電流を絞った状態で分流回路を遮断す
るため、分流回路遮断器の遮断容量を小さくでき、遮断
器の小型化かつ低コスト化が図れ、延いては限流装置自
体も小型かつ低コストにすることができる。In addition, since the shunt circuit is cut off while the current is limited in the shunt circuit, the breaking capacity of the shunt circuit breaker can be reduced, making the circuit breaker smaller and lower in cost, and by extension, the current limiting device itself is also smaller. Moreover, the cost can be reduced.
さらに、全体の構造が簡素化されているため、電線路に
簡単に取付けることができるなど取り扱い易く、電力系
統を合理的かつ経済的に運用することを可能とするもの
である。Furthermore, since the overall structure is simplified, it is easy to handle and can be easily attached to electric lines, making it possible to operate the power system rationally and economically.
第１図は本発明の限流装置の電力系統の線路に対する設
備例を示す略回路図である。
ＤＶ ｊ限流装置
Ｇ ：限流線（超電導線）
Ｒ：分流抵抗器
１ ：分流回路遮断器
２ ：分流電流検出機構
３ ：線路電流検出機構
４ ：線路遮断器
５ ：制御器
６Ｓ７ ：コイル
１０：冷却槽
３０：線路
特許出願人 三菱電線工業株式会社FIG. 1 is a schematic circuit diagram showing an example of the installation of the current limiting device of the present invention on lines of a power system. DV j Current-limiting device G: Current-limiting wire (superconducting wire) R: Shunt resistor 1: Shunt circuit breaker 2: Shunt current detection mechanism 3: Line current detection mechanism 4: Line breaker 5: Controller 6S7: Coil 10 :Cooling tank 30:Line patent applicant Mitsubishi Cable Industries, Ltd.
Claims (1)
クス系超電導材料からなる超電導線を備え、超電導線に
並列に分流回路を設け、分流回路が抵抗と、該抵抗の下
流側に設けた分流回路に流れる電流を遮断する分流回路
遮断器と、分流回路に流れる電流を検出する分流電流検
出機構とを有し、超電導線の下流側に線路を流れる電流
を検出する線路電流検出機構及び線路を流れる電流を遮
断する線路遮断器を取付け、分流電流検出機構によって
検出された分流電流が所定値を越えれば分流回路遮断器
を作動させて分流電流を遮断し、線路電流検出機構によ
って検出された線路電流の通電・遮断の繰り返し回数が
指定回数に達すれば線路遮断器を作動させて線路電流を
遮断するようにした制御器を備えることを特徴とする限
流装置。A current limiting device installed on power system lines, which includes a superconducting wire made of ceramic superconducting material, a shunt circuit provided in parallel with the superconducting wire, and the shunt circuit connected to a resistor and a shunt provided downstream of the resistor. It has a shunt circuit breaker that cuts off the current flowing in the circuit, and a shunt current detection mechanism that detects the current flowing in the shunt circuit, and a line current detection mechanism that detects the current flowing through the line on the downstream side of the superconducting wire, and a line. A line breaker is installed to cut off the flowing current, and if the shunt current detected by the shunt current detection mechanism exceeds a predetermined value, the shunt circuit breaker is activated to cut off the shunt current, and the shunt current detected by the line current detection mechanism is installed. A current limiting device characterized by comprising a controller that operates a line breaker to interrupt line current when the number of repetitions of energization and interruption of current reaches a specified number of times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63115916A JPH01286735A (en) | 1988-05-11 | 1988-05-11 | Current limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63115916A JPH01286735A (en) | 1988-05-11 | 1988-05-11 | Current limiting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01286735A true JPH01286735A (en) | 1989-11-17 |
Family
ID=14674389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63115916A Pending JPH01286735A (en) | 1988-05-11 | 1988-05-11 | Current limiting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01286735A (en) |
-
1988
- 1988-05-11 JP JP63115916A patent/JPH01286735A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3873887A (en) | Alternating-current power delivery system | |
| US4119866A (en) | High voltage electrical network with DC ice-melting device and current return through ground | |
| CA2178356C (en) | A high voltage electric power line current limiter | |
| KR101875563B1 (en) | Quench detection system for a superconductor fault current limiter | |
| JP2007157700A (en) | Power circuit protection device using superconductor | |
| WO2021022949A1 (en) | Looped network controller and control method | |
| DE10040231A1 (en) | Short circuit protection system for ships | |
| US4763220A (en) | Static switch circuit or device for the protected supply of a load, and its line | |
| CN105206449B (en) | Make the apparatus and method and current limliting arrangement of the current interruption of transmission line of electricity or distribution line | |
| JPH01286735A (en) | Current limiting device | |
| JPH01286733A (en) | Current limiting unit | |
| JPH01286732A (en) | Current limiting unit | |
| JPH01286734A (en) | Current limiting device | |
| JPH01202110A (en) | Ice and snow removing method for transmission line and its device | |
| JPH01286737A (en) | Current limiting device | |
| JPH01303020A (en) | Current limiter | |
| JPH01204327A (en) | Circuit breaker | |
| JPH01149330A (en) | Switch with built-in lightening protector | |
| JPH0265619A (en) | Automatic multi-circuit switch | |
| RU2777031C1 (en) | Method for protecting a current-limiting device based on high-temperature superconductors in a high-voltage network line without a shutter element and a complex of relay protections for implementing the method | |
| JPH01286736A (en) | Connecting unit | |
| SU748672A1 (en) | Device for disconnection of electric equipment at short-circuiting in ac network | |
| JPH0733555Y2 (en) | Ceramics current-limiting line | |
| JPH01206839A (en) | Current limiter and current limiter for branch line | |
| JPH01206831A (en) | Superconducting phase breaking device for superconducting wire |