JPS58136299A - Demagnetizing device for superconductive generator - Google Patents
Demagnetizing device for superconductive generatorInfo
- Publication number
- JPS58136299A JPS58136299A JP1641082A JP1641082A JPS58136299A JP S58136299 A JPS58136299 A JP S58136299A JP 1641082 A JP1641082 A JP 1641082A JP 1641082 A JP1641082 A JP 1641082A JP S58136299 A JPS58136299 A JP S58136299A
- Authority
- JP
- Japan
- Prior art keywords
- generator
- voltage
- breaker
- magnetic flux
- thyristor rectifier
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
- H02P9/12—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for demagnetising; for reducing effects of remanence; for preventing pole reversal
- H02P9/123—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for demagnetising; for reducing effects of remanence; for preventing pole reversal for demagnetising; for reducing effects of remanence
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
Description
【発明の詳細な説明】
発明の技術分野
本発明は発電機の励磁制御に係り特に界磁巻線に超電導
線を用いた超電導発電機の急速減磁装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to excitation control of a generator, and more particularly to a rapid demagnetization device for a superconducting generator using a superconducting wire in a field winding.
発明の技術的背景
界磁巻線を超電導状態に構成した超電導発電機は一般の
発電機Ｃ：比べ軽重量、小形化、低損失、系統安定闇の
向上に寄与する等利点が多いため超電導発電機の開発が
海外および国内において鋭意進められている。この超電
導発電機の特徴として界磁巻線の抵抗値がリアクタンス
値に比べ非常に小さい（略零）ため界磁巻線の時定数が
非常に大きい事が上げられる。Technical Background of the Invention A superconducting generator with a field winding in a superconducting state has many advantages compared to a general generator C: lighter weight, smaller size, lower loss, and contributes to improved system stability. The development of this machine is being actively pursued both overseas and in Japan. A feature of this superconducting generator is that the time constant of the field winding is very large because the resistance value of the field winding is very small (substantially zero) compared to the reactance value.
第１図に超電導発電機における従来の励磁制御の一例を
示す。同図において通常運転時の励磁電源は、発電機１
の電機子回路の励磁電源変圧器３の低圧側のサイリスタ
整流器４により交流から直流に賓換することによってえ
られる。−１発電機電圧を一定に保つため発電機電機子
回路電圧が計器用変圧器５経由自動電圧調整器６に与え
られ、自動電圧調整器６よりゲート点弧角制御装置１５
を通してサイリスタ整流器４のゲート回路にゲート制御
信号が与えられサイリスタ整流器４の直流出力電圧を調
整することにより励磁制御が行われる。発電機電機子巻
線及び端子部から発電機しゃ断器７までの間で短絡事故
等が起きた場合には図示しない保護継電器等によりこの
事故を検出し発電機しゃ断器７、界磁しゃ断器８を開に
し、さらに界磁しゃ断器８の常閉接点９を閉じることに
より放電抵抗器１０が投入され界磁巻線２の減磁作用が
行われ事故電流の供給を低減して事故拡大をＭぐのが一
般的である。FIG. 1 shows an example of conventional excitation control in a superconducting generator. In the figure, the excitation power source during normal operation is generator 1.
This is obtained by converting AC to DC using the thyristor rectifier 4 on the low voltage side of the excitation power supply transformer 3 of the armature circuit. -1 In order to keep the generator voltage constant, the generator armature circuit voltage is given to the automatic voltage regulator 6 via the instrument transformer 5, and the gate firing angle control device 15 is supplied from the automatic voltage regulator 6 to the automatic voltage regulator 6.
A gate control signal is applied to the gate circuit of the thyristor rectifier 4 through the thyristor rectifier 4, and excitation control is performed by adjusting the DC output voltage of the thyristor rectifier 4. If a short-circuit accident occurs between the generator armature windings and terminals to the generator breaker 7, this accident is detected by a protective relay (not shown), and the generator breaker 7 and field breaker 8 By closing the normally closed contact 9 of the field breaker 8, the discharge resistor 10 is turned on and the field winding 2 is demagnetized, reducing the supply of fault current and preventing the accident from spreading. This is common.
背景技術の問題点
ところで超電導発電機１においては上記の如く界磁巻線
２の時定数が非常に大きいため事故電流が長く継続する
欠点がある。Problems with the Background Art As mentioned above, the time constant of the field winding 2 is very large in the superconducting generator 1, so there is a drawback that the fault current continues for a long time.
発明の目的
本発明はこの欠点を解消させるために、発電機界磁巻線
の残留磁束を急速に減衰させ得る超電導発電機の減磁装
置を提供することを目的とするものである。OBJECTS OF THE INVENTION In order to overcome this drawback, it is an object of the present invention to provide a demagnetizing device for a superconducting generator that can rapidly attenuate the residual magnetic flux of the generator field winding.
発明の概要
本発明は、超電導発電機の電機子回路の事故時に、発電
機の励磁装置の一部を共用し、他の交流電圧をサイリス
タ整流器で変換１整し、常時励磁電圧の数倍で且つ正負
逆極性の直流電圧とし、これを発電機の界磁巻線に加え
て残留磁束を急減させるものである。Summary of the Invention The present invention provides, in the event of an accident in the armature circuit of a superconducting generator, a part of the generator's excitation device is shared, other alternating current voltage is converted and adjusted with a thyristor rectifier, and the constant excitation voltage is several times the excitation voltage. In addition, a direct current voltage of opposite polarity is applied to the field winding of the generator to rapidly reduce the residual magnetic flux.
発明の実施例
以下本発明の一実施例について＠２図を引用して説明す
る。第２図において起動変圧器１４、減磁電源変圧器１
２、減磁しゃ断器１３、サイリスタ整流器１１１界磁し
ゃ断器８、界磁しゃ断器８の常閉接点９、放電抵抗器１
０および自動電圧調整器６、およびゲート点弧角制御装
置１５は発電１ｆｉｌの電機子回路から発電機しゃ断器
７の間で短絡事故等が発生した場合、発電機からの事故
電流供給を早期に減衰せしめるための減磁装置を構成す
るものである。Embodiment of the Invention An embodiment of the present invention will be described below with reference to Figure @2. In Fig. 2, a starting transformer 14, a demagnetizing power supply transformer 1
2. Demagnetizing breaker 13, thyristor rectifier 111 field breaker 8, normally closed contact 9 of field breaker 8, discharge resistor 1
0, an automatic voltage regulator 6, and a gate firing angle control device 15, if a short circuit accident occurs between the armature circuit of the power generation 1fil and the generator breaker 7, the fault current supply from the generator is quickly stopped. This constitutes a demagnetizing device for attenuation.
通常運転時において発電機ｌの励磁制御は従来と同様に
行われるが、減磁装置は界磁しゃ断器８が閉のため、そ
の常閉接点９は開、減磁しゃ断器１３は開となっている
。During normal operation, the excitation control of the generator 1 is performed in the same way as before, but since the field breaker 8 of the demagnetizing device is closed, its normally closed contact 9 is open, and the demagnetizing breaker 13 is open. ing.
一方前述の事故時に備え、通常運転中にサイリスタ整流
器４の出力電圧に対して数倍でかつ正負逆極性の電圧を
出□力するように、サイリスタ整流器１１の出力電圧を
自動電圧調整器６およびゲート点弧角制御装置ｔ５によ
って調整しておく。On the other hand, in preparation for the above-mentioned accident, the output voltage of the thyristor rectifier 11 is adjusted by the automatic voltage regulator 6 and It is adjusted by the gate firing angle control device t5.
前述の事故が発生した時は図示しない保護継電器等によ
り事故検出を行い、ここに述べてない閉塞継電器等を動
作させ、引外し信号を送ることにより、発電機しゃ断器
７、界磁しゃ断器８を開路、従ってその常閉接点９を閉
路させるが、同時に紘磁しゃ断器１３を投入させ、ｌｌ
ｉ＆磁用のサイリスタ整流器１１の出力電圧が、放電抵
抗器１０経由発蟻槽界磁巻線２に印加される。When the above-mentioned accident occurs, the accident is detected by a protective relay (not shown), etc., and a blocking relay (not described here) is activated to send a tripping signal to the generator breaker 7 and field breaker 8. Opens the circuit, thus closing its normally closed contact 9, but at the same time closes the magnetic circuit breaker 13,
The output voltage of the thyristor rectifier 11 for i&magnetism is applied to the ant tank field winding 2 via the discharge resistor 10.
゛ こうして、あらかじめ事故発生前にサイリスタ
整塘、器４の出力電圧の数倍でかつ正負逆極性に調整さ
れたサイリスタ整流器１１の出力電圧が発電機界磁巻線
２に急速に印加されるため、発電機界磁巻線２の残留磁
束を打消す方向に磁束が発生し、放電抵抗器１０と相俟
って残留磁束は急速に減衰するため、発電機１より供給
される半故纜流も急速に減衰することとなる。゛ In this way, the output voltage of the thyristor rectifier 11, which was adjusted in advance to be several times the output voltage of the thyristor rectifier 4 and have opposite polarity, is rapidly applied to the generator field winding 2 before the accident occurs. , a magnetic flux is generated in the direction that cancels the residual magnetic flux of the generator field winding 2, and the residual magnetic flux rapidly attenuates in combination with the discharge resistor 10, so that the semi-faulty current supplied from the generator 1 will also decrease rapidly.
長時間、減磁用のサイリスタ整流器１１の出力電圧を発
電機界磁巻線２に加えないよう、減磁用しゃ断５１３は
ここに述べてないタイマー等により復帰開路させる。In order to prevent the output voltage of the thyristor rectifier 11 for demagnetization from being applied to the generator field winding 2 for a long time, the demagnetization cutoff 513 is reset and opened by a timer or the like not described here.
次に本発明の他の実施例について第３図ケ引用して説明
する。第３図において、起動変圧器１４、減磁電源変圧
器１２、しゃ断器１３、サイリスタ整流器１１．界磁し
ゃ断器８、放電抵抗器１０および自動電圧調整器６、お
よびゲート点弧角制御装置１５は発電機ｌの電機子回路
から発電機しゃ断器７の間で短絡事故等が発生した場合
、発電機１からの事故電流供給を早期に減衰せしめるた
めの減磁装置を構成するものである。Next, another embodiment of the present invention will be described with reference to FIG. In FIG. 3, a starting transformer 14, a demagnetizing power supply transformer 12, a breaker 13, a thyristor rectifier 11. The field breaker 8, the discharge resistor 10, the automatic voltage regulator 6, and the gate firing angle control device 15 are configured so that when a short circuit occurs between the armature circuit of the generator 1 and the generator breaker 7, This constitutes a demagnetizing device for quickly attenuating the fault current supply from the generator 1.
通常運転時において、しゃ断器１３の常開接点は閉、常
閉接点は開であり、発電機ｌの励磁制御は従来と同様に
行われる。During normal operation, the normally open contact of the breaker 13 is closed, the normally closed contact is open, and the excitation control of the generator 1 is performed in the same manner as in the conventional case.
一方前述の事故時に備え、通常運転中にサイリスタ整流
器４の出力電圧に対して、数倍でかつ正負逆極性の電圧
を出力するようにサイリスタ整流器１１の出力電圧を自
動電圧調整器６およびゲート点弧角制御装置１５によっ
て調整しておく。On the other hand, in preparation for the above-mentioned accident, the output voltage of the thyristor rectifier 11 is adjusted by the automatic voltage regulator 6 and the gate point so as to output a voltage several times the output voltage of the thyristor rectifier 4 and of opposite polarity during normal operation. Adjustment is made using the arc angle control device 15.
前述の事故が発生した時は、図示しない保護継電器等に
より事故検出を行い、ここに述べてない閉塞継電器等を
動作させ、引外し信号を送ることにより、発電機しゃ断
器７を開略し、しゃ断器１３の常閉接点を開路、常閉接
点を閉路して減磁用のサイリスタ整流器１１の出力電圧
が放電抵抗器１０を経由し発電機界磁巻線２に印加され
る。When the above-mentioned accident occurs, the accident is detected by a protective relay (not shown), etc., and the generator breaker 7 is opened and cut off by operating a blocking relay (not mentioned here) and sending a tripping signal. The output voltage of the thyristor rectifier 11 for demagnetization is applied to the generator field winding 2 via the discharge resistor 10 by opening the normally closed contact of the device 13 and closing the normally closed contact.
こうして、あらかじめ事故発生萌にサイリスタ整流器４
の出力電圧の数倍でかつ正負逆極性に調整されたサイリ
スタ整流器１１の出力電圧が発電機界磁巻線２に急速シ
ー印加されるため、発電機界磁巻線２の残留磁束を打消
す方向に磁束が発生し、放電抵抗器１０と相俟って、残
留磁束は急速に減衰するため、発電機１より供給される
事故電流も急速に減衰することとなる。In this way, when an accident occurs, the thyristor rectifier 4
The output voltage of the thyristor rectifier 11, which is several times the output voltage of Magnetic flux is generated in the direction, and together with the discharge resistor 10, the residual magnetic flux rapidly attenuates, so that the fault current supplied from the generator 1 also rapidly attenuates.
長時間減磁用のサイリスタ整流器１１の出力電圧を発電
機界磁巻線２に加えないよう界磁しゃ断器８およびしゃ
断器１３の常閉接点はここに述べてないタイマー等によ
り復帰開路させる。In order to prevent the output voltage of the thyristor rectifier 11 for long-term demagnetization from being applied to the generator field winding 2, the normally closed contacts of the field breaker 8 and breaker 13 are reset to open circuits by a timer or the like not mentioned here.
更に他の実施例として、起動変圧器から減磁用の電源を
とらずども他に［軸性のある電源があればこれを利用し
て差し支えない。尚本発明は常電導の同期発′罐機で、
如偏なる励磁方式を備えたも発明の効果
以上詳記したように本発明によれば超ｗｌ導発電機にお
いて発電機電機子巻線から発電機しゃ断器間の短絡事故
等が発生した場合、発電機界磁巻線の残留磁束を確実に
急速減衰せしめ、従って事故電流を効果的に抑えること
により、事故点の損傷拡大を防止することができる。As another embodiment, instead of removing the power for demagnetization from the starting transformer, if there is a power supply with axial characteristics, it may be used. The present invention is a normal conduction synchronous generator,
Effects of the Invention Even with Different Excitation Methods As detailed above, according to the present invention, when a short circuit accident occurs between the generator armature winding and the generator breaker in the ultra-WL conductive generator, By ensuring rapid attenuation of the residual magnetic flux in the generator field winding, and thus effectively suppressing the fault current, it is possible to prevent damage from spreading at the fault point.
第１図は従来の励磁装置の構成図、＠２図は本発明の一
実施例を示す構成図、第３図は本発明の他の実施例を示
す構成図である。
１・・・超電導開部発電機 ２・・・界磁巻線３・・・
励磁電源変圧器 ４・・・サイリスタ整流器６・・・
自動電圧謔整器 ８・・・界磁しゃ断器１０・・・放
電抵抗器 １１・・・サイリスタ整流器１２・・
・減磁ｗＬ源変圧器 １３・・・しゃ断器１５・・・
ゲート点弧角制御装置
（７３１７）代理人 弁理士 則 近 會 佑（ほか１
名）
第１図
（：′Ｓ２図
第３図FIG. 1 is a block diagram of a conventional excitation device, FIG. 2 is a block diagram showing one embodiment of the present invention, and FIG. 3 is a block diagram showing another embodiment of the present invention. 1... Superconducting open section generator 2... Field winding 3...
Excitation power supply transformer 4... Thyristor rectifier 6...
Automatic voltage regulator 8... Field breaker 10... Discharge resistor 11... Thyristor rectifier 12...
・Demagnetizing wL source transformer 13... Breaker 15...
Gate firing angle control device (7317) Agent: Patent attorney Nori Chikakai Yu (and 1 others)
Figure 1 (:'S2 Figure 3)
Claims (1)
励磁装置の一部を共用し、別に確保された交流電圧をサ
イリスタ整流器で変換調整し、常時励磁電圧の数倍でか
つ正負逆極性の直流電圧とし、これを発電機の界磁巻線
に加えて残留磁束を急減せしめることを特徴とする超電
導発電機の減磁装置。When an accident occurs in the armature circuit of a superconducting generator, a part of the generator excitation system is shared, and the separately secured AC voltage is converted and adjusted using a thyristor rectifier, and the voltage is always several times the excitation voltage and has opposite polarity. A demagnetizing device for a superconducting generator, characterized in that the DC voltage is applied to the field winding of the generator to rapidly reduce the residual magnetic flux.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1641082A JPS58136299A (en) | 1982-02-05 | 1982-02-05 | Demagnetizing device for superconductive generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1641082A JPS58136299A (en) | 1982-02-05 | 1982-02-05 | Demagnetizing device for superconductive generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58136299A true JPS58136299A (en) | 1983-08-13 |
Family
ID=11915464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1641082A Pending JPS58136299A (en) | 1982-02-05 | 1982-02-05 | Demagnetizing device for superconductive generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58136299A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010130776A (en) * | 2008-11-27 | 2010-06-10 | Mitsubishi Electric Corp | Initial exciting device of power generator |
| JP2015535679A (en) * | 2012-11-30 | 2015-12-14 | シーメンス アクティエンゲゼルシャフト | Apparatus and method for extending fault removal time |
-
1982
- 1982-02-05 JP JP1641082A patent/JPS58136299A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010130776A (en) * | 2008-11-27 | 2010-06-10 | Mitsubishi Electric Corp | Initial exciting device of power generator |
| JP2015535679A (en) * | 2012-11-30 | 2015-12-14 | シーメンス アクティエンゲゼルシャフト | Apparatus and method for extending fault removal time |
| US9564750B2 (en) | 2012-11-30 | 2017-02-07 | Siemens Aktiengesellschaft | Device and method for increasing fault clearing time |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1126847A (en) | Ground fault protection system for industrial power circuits | |
| US3558982A (en) | Current limiting protective means | |
| JPS58136299A (en) | Demagnetizing device for superconductive generator | |
| JP3022232B2 (en) | Phase adjusting transformer and method of protecting the transformer | |
| US3676737A (en) | Ground-fault detector using square hysteresis loop reactor core | |
| JPS6051329B2 (en) | Electric leakage or disconnection | |
| US1760542A (en) | Electroresponsive device | |
| GB2251741A (en) | Rapid response ground fault circuit interrupter | |
| US3794889A (en) | Open air gap operation with static overload device | |
| US3324384A (en) | Generator with field resistance switching | |
| US1919980A (en) | Control of electric circuits | |
| US3935515A (en) | Current auxiliary relay for circuit breaker | |
| SU128931A1 (en) | Device for overcurrent protection of three-phase electric motors | |
| JPH0113301B2 (en) | ||
| SU1162006A1 (en) | Device for overload protection of electric motor | |
| JP2901308B2 (en) | Automatic switch circuit | |
| JPS63294298A (en) | Excitation control device | |
| JPS59132799A (en) | Exciter for superconductive generator | |
| US2256251A (en) | Device responsive to sudden changes in electric circuits | |
| JPH06168820A (en) | Power supply for nuclear fusion device | |
| SU613436A1 (en) | Electric locomotive current protection device | |
| SU37763A1 (en) | Device to protect electrical installations from overcurrents | |
| SU738034A1 (en) | Device for remote protection of generator | |
| JPS6070918A (en) | Overcurrent relay | |
| SU1089694A1 (en) | Device for protecting three-phase motor against two-phase operation |