JP3443926B2 - Commutation type DC circuit breaker - Google Patents
Commutation type DC circuit breakerInfo
- Publication number
- JP3443926B2 JP3443926B2 JP06829694A JP6829694A JP3443926B2 JP 3443926 B2 JP3443926 B2 JP 3443926B2 JP 06829694 A JP06829694 A JP 06829694A JP 6829694 A JP6829694 A JP 6829694A JP 3443926 B2 JP3443926 B2 JP 3443926B2
- Authority
- JP
- Japan
- Prior art keywords
- commutation
- circuit
- circuit breaker
- current
- main
- 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 - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は転流回路を改良した転流
型直流遮断器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a commutation type DC circuit breaker having an improved commutation circuit.
【０００２】[0002]
【従来の技術】特開昭63−225447号公報に記載された転
流型直流遮断器は、直流回路に接続されている。直流回
路の例えば負荷側で短絡事故が生じると、事故電流が流
れる。事故電流は直流回路に設けた変流器で検出される
と、制御装置で判断し、駆動装置により、遮断器例えば
真空遮断器の主接点を開極すると共に、主接点に電気的
並列に接続したリアクトル及びコンデンサと転流スイッ
チとより成る転流回路の転流スイッチを閉じて、事故電
流と逆向きのコンデンサの放電々電流つまり転流電流を
主接点に流し、これにより主回路電流に強制点に電流零
点を作り、主接点で電流遮断を行うようにしていた。2. Description of the Related Art The commutation type DC circuit breaker described in JP-A-63-225447 is connected to a DC circuit. When a short circuit accident occurs on the load side of the DC circuit, a fault current flows. When the fault current is detected by the current transformer provided in the DC circuit, it is judged by the control device, and the drive device opens the main contact of the circuit breaker, for example, the vacuum circuit breaker, and connects it in electrical parallel with the main contact. By closing the commutation switch of the commutation circuit consisting of the reactor and the capacitor and the commutation switch, the discharge current of the capacitor in the opposite direction of the fault current, that is, the commutation current, is applied to the main contact, which forces the main circuit current. The current zero point was made at the point and the current was cut off at the main contact.
【０００３】一方、変電所内の直流き電回路の構成機器
の制御及び操作は、中央指令室で行っており、主回路の
状態把握は機器の駆動部に連動した補助開閉器により行
われる。例えば変流器からの事故電流が中央指令室に入
力されると、中央指令室より制御装置に遮断指令が出力
される。中央指令室は主接点の遮断指令を補助開閉器に
より表示されている。On the other hand, the control and operation of the components of the DC feeding circuit in the substation are carried out in the central command room, and the state of the main circuit is grasped by the auxiliary switch interlocked with the drive part of the equipment. For example, when a fault current from the current transformer is input to the central command room, a cutoff command is output from the central command room to the control device. In the central command room, a command to shut off the main contact is displayed by an auxiliary switch.
【０００４】[0004]
【発明が解決しようとする課題】この状態で主接点が何
らかの原因で両主接点が接着したり、或いは両主接点表
面に突起を生じたりする等により、アーク電流が流れ続
けている所謂内部短絡を生じると、転流電流を流して
も、電流零点はできず、遮断器は遮断不能を生じ、中央
指令室の遮断指令表示と現場の遮断器の状態が違うと人
身事故を生じたり、事故が拡大したり等の恐れがある。In this state, a so-called internal short circuit in which the arc current continues to flow due to the main contacts adhering to each other for some reason or the projections on the surfaces of both main contacts are caused. If a commutation current is applied, the current zero point cannot be achieved, and the breaker cannot be broken.If the break command display in the central command room and the breaker status at the site are different, a personal injury or an accident will occur. There is a risk of enlargement.
【０００５】本発明の目的は、遮断不能による人身事故
及び事故の拡大を防止した安全な転流型直流遮断器を提
供することにある。An object of the present invention is to provide a safe commutation type DC circuit breaker which prevents a personal injury or an accident from spreading due to failure of interruption.
【０００６】[0006]
【課題を解決するための手段】本発明の転流型直流遮断
器は、直流主回路に主接点を有する遮断器を接続し、遮
断器に転流スイッチを有する転流回路を並列接続し、直
流主回路の電流検出器で事故電流を検出すると、主接点
を開放すると共に、転流スイッチを閉じて、転流電流を
主接点に流し事故電流を強制的に電流零として遮断し、
主回路に転流電流を流した後、再び転流スイッチを開極
し、直流主回路に事故電流が流れているか否かを電流検
出器で検出することにある。A commutation type DC circuit breaker according to the present invention has a DC main circuit connected to a circuit breaker having a main contact, and a circuit breaker connected in parallel to a commutation circuit having a commutation switch. When a fault current is detected by the current detector of the DC main circuit, the main contact is opened and the commutation switch is closed to detect the commutation current.
It is sent to the main contact and the accident current is forcibly cut off as a zero current.
After the commutation current is passed through the main circuit, the commutation switch is opened again and the current detector detects whether a fault current is flowing through the DC main circuit.
【０００７】[0007]
【作用】即ち、転流遮断中に転流スイッチを瞬時開極
し、電流検出器で事故電流を検出し、遮断器の遮断不能
をすぐに検出できるので、遮断器設置現場と中央指令室
と表示が一致し、人身事故を防止することができるよう
になった。[Function] That is, the commutation switch is momentarily opened during the commutation interruption, and the fault current can be detected by the current detector, and the failure of the circuit breaker can be immediately detected. The display matches, and it is now possible to prevent personal injury.
【０００８】[0008]
【実施例】以下、本発明の実施例を図１に示す転流型直
流遮断器１の回路面により説明する。Embodiments of the present invention will be described below with reference to the circuit side of a commutation type DC circuit breaker 1 shown in FIG.
【０００９】転流型直流遮断器１は真空遮断器の主接点
１Ａと転流回路４とより成る。直流主回路３に主接点１
Ａ及び主接点２Ａが直列接続されている。主接点２Ａは
真空遮断器より成る断路器である。直流遮断機１に並列
に接続された転流回路４は、コンデンサ５，リアクトル
６，転流スイッチ７を直列接続している。非直線抵抗８
は転流回路４及び主接点１Ａに並列に接続されている。The commutation type DC circuit breaker 1 comprises a vacuum circuit breaker main contact 1A and a commutation circuit 4. Main contact 1 for DC main circuit 3
A and the main contact 2A are connected in series. The main contact 2A is a disconnecting switch composed of a vacuum circuit breaker. The commutation circuit 4 connected in parallel to the DC breaker 1 has a capacitor 5, a reactor 6, and a commutation switch 7 connected in series. Non-linear resistance 8
Are connected in parallel to the commutation circuit 4 and the main contact 1A.
【００１０】電流検出器例えば変流器９は主接点側２Ａ
の直流主回路３に接続され、変流器９の出力側は制御装
置１０に接続されており、制御装置１０は電流検出器９
の検出値を判断し、駆動装置１１に指令を出す。駆動装
置１１の指令は各主接点１Ａ，２Ａと転流スイッチ７を
開閉する。The current detector, for example, the current transformer 9 has a main contact side 2A.
Is connected to the DC main circuit 3 of the current transformer 9, and the output side of the current transformer 9 is connected to the control device 10.
Is detected and a command is issued to the drive device 11. The command from the drive unit 11 opens and closes the main contacts 1A and 2A and the commutation switch 7.
【００１１】請求項１の作用効果
例えば直流主回路３の負荷側に短絡事故が起きて、事故
電流Ｉ1 が流れると、変流器９で検出し、制御装置１０
に入力し、制御装置１０より駆動装置１１を介して、主
接点１Ａに開極指令を与えると共に、転流スイッチ７も
閉極し、主接点１Ａに事故電流Ｉ1とは逆向きの転流電
流Ｉ2が流れるが、主接点１Ａが遮断不能の場合には、
電流零点は発生せず、遮断不能となり、事故電流Ｉ1 は
流れ続けている。When the short circuit accident occurs on the load side of the DC main circuit 3 and the accident current I 1 flows, it is detected by the current transformer 9 and the control device 10 is operated.
To the main contact 1A via the drive device 11 from the control device 10, and the commutation switch 7 is also closed, so that the main contact 1A is commutated in the direction opposite to the fault current I 1. A current I 2 flows, but if the main contact 1A cannot be interrupted,
The current zero point does not occur, interruption is impossible, and the fault current I 1 continues to flow.
【００１２】この状態で、転流スイッチ７を瞬時開極す
れば、転流電流Ｉ2 は流れず、主接点１Ａは事故電流Ｉ
1により内部短絡している為に、事故電流Ｉ1が直流主回
路３に流れ、この電流を変流器９で検出するので、遮断
不能であることが、現場と中央指令室とで同時に分か
り、誤動作を防止でき、現場での人身事故を防止できる
ようになった。In this state, if the commutation switch 7 is instantly opened, the commutation current I 2 does not flow, and the main contact 1A has a fault current I 2.
Due to the internal short circuit caused by 1 , the fault current I 1 flows into the DC main circuit 3 and this current is detected by the current transformer 9, so it can be seen at the site and the central command room at the same time that it cannot be interrupted. , It is possible to prevent malfunction and prevent accidents resulting in injury or death in the field.
【００１３】請求項３の作用効果
又、本発明では直流遮断器２を設けて、転流スイッチ７
と逆の動作をさせている。例えば、転流スイッチ７が閉
じると、直流遮断器２は開放して、転流電流Ｉ2 が直流
遮断器側に流れるのを防止できるので、負荷側での事故
を防止できる利点がある。Further, in the present invention, the DC breaker 2 is provided and the commutation switch 7 is provided.
The opposite operation is performed. For example, when the commutation switch 7 is closed, the DC circuit breaker 2 is opened, and the commutation current I 2 can be prevented from flowing to the DC circuit breaker side, which is advantageous in that an accident on the load side can be prevented.
【００１４】請求項２の作用効果
図２は転流型直流遮断器１を直流変電所２０に使用した
場合である。３相の転流型直流遮断器１には断路器２１
を直列接続している。この直列回路に予備用転流型直流
遮断器２２及び予備用断路器２３を並列接続している。Operation and Effect of Claim 2 FIG. 2 shows the case where the commutation type DC circuit breaker 1 is used in the DC substation 20. The three-phase commutation type DC circuit breaker 1 has a disconnector 21
Are connected in series. A spare commutation type DC circuit breaker 22 and a spare disconnecting switch 23 are connected in parallel to this series circuit.
【００１５】このため、遮断不能の場合、制御装置１０
より切替スイッチ及び駆動装置１１により断路器２１を
開放し、予備用断路器２３を閉放する指令を与えて、事
故主接点１Ａを切り離すと共に、予備用転流型直流遮断
器２２及び予備用断路器２３により直流電流を電車に流
して、電車を運転できるので、電車が停止するのを防止
できるようになった。Therefore, when the interruption is impossible, the control device 10
From the changeover switch and drive device 11, a command to open the disconnector 21 and close the spare disconnector 23 is given to disconnect the main accident contact 1A, and the spare commutation type DC circuit breaker 22 and the spare disconnector are connected. Since the electric current can be applied to the electric train by the device 23 to drive the electric train, the electric train can be prevented from stopping.
【００１６】又本発明の転流型直流遮断器１は例えば圧
延機の直流変電設備も使用できることは勿論である。The commutation type DC circuit breaker 1 of the present invention can also be used in a DC substation facility of a rolling mill, for example.
【００１７】[0017]
【発明の効果】以上のように、本発明の転流型遮断器に
よれば、遮断器の遮断不能をすぐに検出できると同時
に、事故電流Ｉ1 を事故遮断器を確実に切り離して、予
備転流型直流遮断器で事故電流Ｉ1 を遮断するようにし
たので、事故の拡大を確実に防止できるようになった。As described above, according to the commutation type circuit breaker of the present invention, the failure of the circuit breaker can be immediately detected, and at the same time, the accident current I 1 can be reliably disconnected from the circuit breaker to make a backup. Since the accident current I 1 is cut off by the commutation type DC circuit breaker, it is possible to reliably prevent the accident from spreading.
【図１】本発明の実施例による転流式直流遮断器を示す
概略構成図である。FIG. 1 is a schematic configuration diagram showing a commutation type DC circuit breaker according to an embodiment of the present invention.
【図２】図１を直流電鉄用変電設備に使用した回路図で
ある。FIG. 2 is a circuit diagram in which FIG. 1 is used in a DC electric railway substation facility.
１Ａ，２Ａ…主接点、３…主回路、４…転流回路、５…
コンデンサ、６…リアクトル、７…転流スイッチ、８…
非直線抵抗、９…変流器、１０…制御装置、１１…駆動
装置。1A, 2A ... Main contact point, 3 ... Main circuit, 4 ... Commutation circuit, 5 ...
Capacitor, 6 ... Reactor, 7 ... Commutation switch, 8 ...
Non-linear resistance, 9 ... Current transformer, 10 ... Control device, 11 ... Driving device.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 細田 稔 茨城県日立市国分町一丁目１番１号 株 式会社 日立製作所 国分工場内 (56)参考文献 特開 平５−89753（ＪＰ，Ａ) 特開 昭61−231835（ＪＰ，Ａ) 特開 平５−234471（ＪＰ，Ａ) 特開 昭57−138730（ＪＰ，Ａ) 実開 昭56−76235（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01H 33/59 H02H 7/26 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Minor Hosoda Inventor Minoru 1-1 1-1 Kokubun-cho, Hitachi-shi, Ibaraki Hitachi, Ltd. Kokubun factory (56) Reference JP-A-5-89753 (JP, A) JP-A 61-231835 (JP, A) JP-A 5-234471 (JP, A) JP-A 57-138730 (JP, A) Actual development JP-A 56-76235 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) H01H 33/59 H02H 7/26
Claims (2)
され、かつ、該遮断器に転流スイッチを有する転流回路
が並列接続され、前記直流主回路に接続されている電流
検出器で事故電流を検出すると、前記主接点を開放する
と共に、転流スイッチを閉じて転流電流を主接点間に流
し事故電流を強制的に電流零として遮断する転流型直流
遮断器と、直列に断路器が接続され、該転流型直流遮断
器と並列に予備転流型直流遮断器を並列接続し、前記断
路器と逆動作をする予備断路器を前記断路器と並列接続
したことを特徴とする転流型直流遮断器。 1. A current detector in which a circuit breaker having a main contact is connected to a DC main circuit, and a commutation circuit having a commutation switch is connected in parallel to the circuit breaker, and which is connected to the DC main circuit. When a fault current is detected at, the main contact is opened, and the commutation switch is closed to let the commutation current flow between the main contacts to forcibly shut off the fault current as a zero current. A disconnector is connected to the auxiliary commutation type DC circuit breaker in parallel with the auxiliary commutation type DC circuit breaker in parallel, and a preliminary disconnecting circuit reverse to the disconnecting circuit is connected in parallel with the disconnecting circuit. Characteristic commutation type DC circuit breaker.
負荷側に転流スイッチと逆動作する開閉器が接続されて
いることを特徴とする請求項１記載の転流型直流遮断
器。 2. A commutation type DC circuit breaker according to claim 1, wherein a switch which operates in reverse with the commutation switch is connected to the load side of the DC main circuit to which the circuit breaker is connected.
vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06829694A JP3443926B2 (en) | 1994-04-06 | 1994-04-06 | Commutation type DC circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06829694A JP3443926B2 (en) | 1994-04-06 | 1994-04-06 | Commutation type DC circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07282691A JPH07282691A (en) | 1995-10-27 |
| JP3443926B2 true JP3443926B2 (en) | 2003-09-08 |
Family
ID=13369686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06829694A Expired - Fee Related JP3443926B2 (en) | 1994-04-06 | 1994-04-06 | Commutation type DC circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3443926B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3674419B2 (en) * | 1999-11-17 | 2005-07-20 | 株式会社日立製作所 | Commutation type DC circuit breaker |
| JP5214066B1 (en) | 2012-05-01 | 2013-06-19 | 三菱電機株式会社 | DC circuit breaker |
| JP6231445B2 (en) * | 2014-07-02 | 2017-11-15 | 株式会社日立産機システム | Commutation type DC circuit breaker and monitoring method thereof |
-
1994
- 1994-04-06 JP JP06829694A patent/JP3443926B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07282691A (en) | 1995-10-27 |
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