JPH01292716A - Control signal detecting device of power breaker - Google Patents

Control signal detecting device of power breaker

Info

Publication number
JPH01292716A
JPH01292716A JP63120492A JP12049288A JPH01292716A JP H01292716 A JPH01292716 A JP H01292716A JP 63120492 A JP63120492 A JP 63120492A JP 12049288 A JP12049288 A JP 12049288A JP H01292716 A JPH01292716 A JP H01292716A
Authority
JP
Japan
Prior art keywords
circuit
current
tripping
control
current transformer
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.)
Granted
Application number
JP63120492A
Other languages
Japanese (ja)
Other versions
JP2592909B2 (en
Inventor
Takaaki Sakakibara
榊原 高明
Isao Kamata
功 鎌田
Junichi Nagata
純一 永田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Engineering Corp
Toshiba Corp
Original Assignee
Toshiba Engineering Corp
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Engineering Corp, Toshiba Corp filed Critical Toshiba Engineering Corp
Priority to JP63120492A priority Critical patent/JP2592909B2/en
Publication of JPH01292716A publication Critical patent/JPH01292716A/en
Application granted granted Critical
Publication of JP2592909B2 publication Critical patent/JP2592909B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To prevent an error operation of ripple generated in a control unit by providing a penetration type current transformer to detect the control current for tripping at the tripping coil side from the connection of a trip circuit and a sealing-in circuit. CONSTITUTION:A penetrating type current transformer 5b to be a control current detecting device is provided at a tripping coil 46 side from the connection 21 of a trip circuit 9 and a sealing-in circuit 20. Therefore, at the former phase the breaking instruction of a breaker is input to an input terminal 9, the current I0 flowing from the sealing-in circuit 20 flows in to the next phase regardless of the penetration type current transformer 5b. As a result, the penetration type current transformer 5b does not detect the current I0 of the sealing-in circuit 20, but detects only the regular tripping instruation current I. The control signal can be detected with no error measurement, consequently.

Description

【発明の詳細な説明】 [発明の目的] (産業上の利用分野) 本発明は遮断器の動作時間計測装置に用いられる電力用
遮断器の制御信号検出装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a control signal detection device for a power circuit breaker used in a circuit breaker operating time measuring device.

(従来の技術) 変電所には、ガス絶縁開閉機器等、高電圧主回路の大切
動作を行う電力用遮断器が設置されており、近年、これ
らの電力用遮断器の信頼性向上、保守の低減および事故
の未然防止等の目的から、これら遮断器の動作を自動的
に監視する装置に対する要求が高まっている。
(Conventional technology) Substations are equipped with power circuit breakers that perform important operations in high-voltage main circuits such as gas-insulated switchgear.In recent years, efforts have been made to improve the reliability and maintenance of these power circuit breakers. There is an increasing demand for a device that automatically monitors the operation of these circuit breakers for the purpose of reducing the number of accidents and preventing accidents.

このような電力用遮断器の動作を自動的に監視する装置
の一つとして、遮断器の動作時間を測定する開閉時間セ
ンサがある。この操作は、電力用遮断器の投入、引外し
制御回路に取付けた電流検出手段によって投入又は引外
し指令の電流を検出し、開閉機器に取付けた位置検出手
段にて開閉動作を検出し、これらの検出手段の出力信号
を計測手段に入力することで、投入又は引外し指令が入
ってから開閉動作するまでの動作時間を計測するもので
ある。
As one of the devices that automatically monitors the operation of such a power circuit breaker, there is a switching time sensor that measures the operation time of the circuit breaker. This operation is performed by detecting the current of the closing or tripping command by the current detecting means attached to the closing and tripping control circuit of the power circuit breaker, and by detecting the opening/closing operation by the position detecting means attached to the switching equipment. By inputting the output signal of the detection means to the measurement means, the operating time from the input of the closing or tripping command to the opening/closing operation is measured.

このような遮断器の動作指令を検出する方式として、以
下のような方式が特願昭62−062501@に提案さ
れている。すなわち、第2図は遮断器の制御信号検出回
路を示したものであり、投入回路は投入指令入力端子1
と、切換スイッチ2、インピーダンス3及びこのインピ
ーダンス3と並列に設けられた投入コイル4aとから構
成されており、投入コイル4aに流れる電流は、投入側
のd油彩変流器(制御電流検出手段)5aにて検出され
るようになっている。
As a method for detecting such a circuit breaker operating command, the following method has been proposed in Japanese Patent Application No. 62-062501@. That is, FIG. 2 shows the circuit breaker control signal detection circuit, and the closing circuit is connected to closing command input terminal 1.
It is composed of a changeover switch 2, an impedance 3, and a closing coil 4a provided in parallel with the impedance 3, and the current flowing through the closing coil 4a is determined by a current transformer (control current detection means) on the closing side. 5a.

この貫通形変流器5aの中には制御線6aが1回以上貫
通している。投入側の貫通形変流器5aの出力信号は、
インピーダンス7aを介してパルス整形回路(信号波形
整形手段)8aに入力される。ここでパルス整形回路8
aは、入力された信号の電流工の立上がりを捕え、それ
に合致したタイミングで方形波を出力する受信器であり
、例えば、シュミットトリガ回路や単安定マルチバイブ
レータ回路等の組合せで構成されている。
A control line 6a passes through the through-type current transformer 5a at least once. The output signal of the feed-through current transformer 5a on the input side is:
The signal is inputted to a pulse shaping circuit (signal waveform shaping means) 8a via an impedance 7a. Here, pulse shaping circuit 8
A is a receiver that captures the rising edge of the input signal and outputs a square wave at a timing that matches the rising edge of the current, and is composed of a combination of, for example, a Schmitt trigger circuit or a monostable multivibrator circuit.

一方、引外し回路は、引外し指令入力端子9と、インピ
ーダンス10及びこのインピーダンス10と直列に設け
られた引外しコイル4bとから構成されており、引外し
コイル4bに流れる電流は、引外し側の貫通形変流器(
制御電流検出手段>5bにて検出されるようになってい
る。この貫通形変流器5bの中には制御線6bが1回以
上貫通している。引外し側の貫通形変流器5bの出力信
号は、インピーダンス7bを介してパルス整形回路(信
号波形整形手段)8bに入力され、投入側と同様に、電
流■の立上がりに合致したタイミングで方形波が出力さ
れるようになっている。
On the other hand, the tripping circuit is composed of a tripping command input terminal 9, an impedance 10, and a tripping coil 4b provided in series with the impedance 10, and the current flowing through the tripping coil 4b is on the tripping side. Through-type current transformer (
The control current is detected by the control current detection means>5b. A control line 6b passes through the through-type current transformer 5b at least once. The output signal of the feedthrough current transformer 5b on the tripping side is input to a pulse shaping circuit (signal waveform shaping means) 8b via an impedance 7b, and similarly to the input side, it is converted into a square shape at a timing that coincides with the rise of the current ■. Waves are now output.

このように構成された電力用遮断器の制御信号検出装置
においては、遮断操作の場合、遮断指令により制御回路
に例えば第3図のへ曲線で示すような電流工が流れると
、この電流は遮断側の貫通形変流器5bにて検出される
。この結果、遮断側の貫通形変流器5bの出力信号はパ
ルス整形回路8bに入力され、同回路8bより第3図中
B曲線の様なパルスが出力される。制御電流の立上がり
から検出器出力パルスが出るまでの時間遅れtlは通常
’1ms以内になるように設定されている。
In the control signal detection device for a power circuit breaker configured as described above, in the case of a disconnection operation, when a current flows through the control circuit in response to a disconnection command, this current is interrupted. It is detected by the through-type current transformer 5b on the side. As a result, the output signal of the cut-off side feedthrough current transformer 5b is input to the pulse shaping circuit 8b, and the pulse shaping circuit 8b outputs a pulse as shown by curve B in FIG. The time delay tl from the rise of the control current to the output of the detector output pulse is normally set to within 1 ms.

一方、遮断器動作位置検出センサにおいては、投入、引
外し状態の各位置を検出し、第3図中C2D曲線の様な
方形波が出力される。このにうに、上記検出器出力パル
スを基準に、各位置検出センサ出力パルスまでの第4図
に示す時間T1 を計測することにより、機器の動作を
監視することができる。
On the other hand, the circuit breaker operating position detection sensor detects each position of the closed and tripped states, and outputs a square wave like the C2D curve in FIG. 3. In this way, the operation of the device can be monitored by measuring the time T1 shown in FIG. 4 until each position detection sensor output pulse, based on the detector output pulse.

(発明が解決しようとする課題) このような方式には以下の様な欠点がある。すなわら、
機器動作時には、制御回路に本来の指令信号を電流が流
れる以前に制御回路に含まれる他のリレー動作の影響又
は制御回路内の回り込み等により、第4図に示すような
制罪電流Aにリップルが発生する場合がある。
(Problems to be Solved by the Invention) Such a system has the following drawbacks. In other words,
When the device is operating, before the original command signal flows through the control circuit, ripples may occur in the control current A as shown in Figure 4 due to the influence of other relay operations included in the control circuit or wrap-around within the control circuit. may occur.

通常のリレー動作の影響等により発生するリップルは、
レベル的に小さく、パルス整形回路8bの入力部での感
度調整により、制御信号検出装置の特性に余り影響を与
えずにそれら影響を除外することが可能である。しかし
、遮断器例外し回路において、引外し側の貫通形変流器
5bが引外し回路9とシールイン回路20とを合流した
後に設置プているため、シールイン回路20からの回り
込みについては、保護リレートリップの目的で、正規遮
断信号電流■が流れる前にシールインかろ20からリレ
ーの励磁電流が数十mA流れる場合がある。このため他
のリップルに比べ非常に大きなリップルIOが正規の制
御電流信号の立上がる前に、検出用貫通形変流器(制御
電流検出手段)5bの設けられている制御線に流れるこ
とになる。
Ripples that occur due to the effects of normal relay operation, etc.
These effects are small in terms of level, and by adjusting the sensitivity at the input section of the pulse shaping circuit 8b, it is possible to eliminate these effects without significantly affecting the characteristics of the control signal detection device. However, in the breaker exception circuit, the feed-through current transformer 5b on the tripping side is installed after the tripping circuit 9 and the seal-in circuit 20 merge, so as for the leakage from the seal-in circuit 20, For the purpose of a protective relay trip, several tens of mA of relay excitation current may flow from the seal-in filter 20 before the normal cutoff signal current (2) flows. Therefore, a ripple IO, which is much larger than other ripples, flows into the control line where the detection feedthrough current transformer (control current detection means) 5b is installed before the normal control current signal rises. .

制御電流検出回路は、上記のようなりツプル■oの立上
がりを捕えてパルスを出力する。このため、機器の動作
時間Toが等価的に延びたことになり、動作時間以上等
の誤警報が発生する問題があった。
The control current detection circuit captures the rising edge of the tuple (I) as described above and outputs a pulse. For this reason, the operating time To of the device is equivalently extended, and there is a problem that false alarms, such as when the operating time is exceeded, occur.

本発明の目的は、制御電流に発生するリップルに誤動作
することなく、正確な動作時間を]測することができる
電力用遮断器の制御信号検出装置を提供することにある
An object of the present invention is to provide a control signal detection device for a power circuit breaker that can accurately measure operating time without malfunctioning due to ripples generated in the control current.

[発明の構成] (課題を解決するための手段) 本発明による電力用遮断器の制御!!信号検出装置は、
制御電流検出手段を通常用いる引外し回路とシールイン
回路との接続点よりも引外しコイル側に設けことを特徴
とするものである。
[Structure of the Invention] (Means for Solving the Problems) Control of a power circuit breaker according to the present invention! ! The signal detection device is
The present invention is characterized in that the control current detection means is provided closer to the tripping coil than the normally used connection point between the tripping circuit and the seal-in circuit.

(作 用) 本発明においては、制御電流に発生するシールイン回路
からの大きなリップルを除外でき、遮断器の正確な動作
時間を計測できる。
(Function) In the present invention, large ripples generated in the control current from the seal-in circuit can be excluded, and the operating time of the circuit breaker can be accurately measured.

(実施例) 以下本発明を第1図に示す実施例を参照して説明する。(Example) The present invention will be explained below with reference to the embodiment shown in FIG.

第1図において、第2図と同一符号は同一部分を示すも
のであるからその説明を省略する。
In FIG. 1, the same reference numerals as in FIG. 2 indicate the same parts, so the explanation thereof will be omitted.

第1図において、本発明による電力用遮断器の制御信号
検出装置は、制御電流検出手段の貫油彩変流器5bを引
外し回路9とシールイン回路20との接続点21よりも
引外しコイル46側に設けたことを特徴とするものであ
る。
In FIG. 1, the control signal detection device for a power circuit breaker according to the present invention detects a trip coil current transformer 5b as a control current detection means from a connection point 21 between a trip circuit 9 and a seal-in circuit 20. It is characterized by being provided on the 46 side.

第1図において、遮断器の遮断指令が入力端子9に入る
前段階で、シールイン回路20から流れる電流■oは、
引外し側の貫油彩変流器5bと関係なく次段に流れ込む
。したがって貫油彩変流器5bはシールイン回路20の
電流IOを検出することなく、正規の引外し指令電流■
のみを検出することになる。貫油彩変流器5bを引外し
コイル側に設けても問題なく、動作時間を十分な精度で
検出できる。
In FIG. 1, before the circuit breaker interrupting command enters the input terminal 9, the current ■o flowing from the seal-in circuit 20 is:
It flows into the next stage regardless of the oil-through current transformer 5b on the tripping side. Therefore, the oil-through current transformer 5b does not detect the current IO of the seal-in circuit 20, and the normal trip command current
will be detected only. There is no problem even if the oil-through current transformer 5b is provided on the tripping coil side, and the operating time can be detected with sufficient accuracy.

[発明の効果] 以上説明したように、本発明によれば、制御電流検出手
段の貫油彩変流器の設置場所を変更するという間中な構
成により、誤計測のない正確な電力用遮断器の制御信号
検出装置を構成することができる。
[Effects of the Invention] As explained above, according to the present invention, an accurate power circuit breaker without erroneous measurements can be achieved by changing the installation location of the oil-through current transformer of the control current detection means. A control signal detection device can be configured.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明による電力用遮断器の制御信号検出装置
の一実施例を示す回路図、第2図は従来の遮断器の制御
信号検出回路を示す回路図、第3図および第4図は制御
電流、制御信号検出器、位置検出センサの出力信号を示
すタイムチP−ト図である。 1・・・投入指令入力端子 2・・・切換スイッチ 3.7a、7b、10・・・インピーダンス4a・・・
投入コイル 4b・・・引外しコイル 5a・・・投入側の貫油彩変流器 5b・・・引外し側の貫油彩変流器 8a・・・投入側のパルス整形回路 8b・・・引外し側のパルス整形回路 9・・・引外し指令入力端子 20・・・シールイン回路 21・・・接続点 ■・・・引外し指令電流 IQ・・・シールイン回路から流れる電流(リップル) (8733)代理人 弁理士 猪 股 祥 晃(ばか 
1名) b 第1図
FIG. 1 is a circuit diagram showing an embodiment of a control signal detection device for a power circuit breaker according to the present invention, FIG. 2 is a circuit diagram showing a conventional control signal detection circuit for a circuit breaker, and FIGS. 3 and 4 1 is a time chart diagram showing output signals of a control current, a control signal detector, and a position detection sensor; FIG. 1... Closing command input terminal 2... Changeover switch 3.7a, 7b, 10... Impedance 4a...
Closing coil 4b...Tripping coil 5a...Through oil current transformer 5b on the closing side...Through oil current transformer 8a on the tripping side...Pulse shaping circuit 8b on the closing side...Tripping Side pulse shaping circuit 9...Tripping command input terminal 20...Seal-in circuit 21...Connection point ■...Tripping command current IQ...Current flowing from the seal-in circuit (ripple) (8733 ) Agent Patent Attorney Yoshiaki Inomata (Baka
1 person) b Figure 1

Claims (1)

【特許請求の範囲】[Claims]  投入回路、引外回路およびシールイン回路を備えた電
力用遮断器の投入、引外制御回路において、引外用制御
電流を検出する貫通形変流器を前記引外回路とシールイ
ン回路との接続点より引外コイル側に設けたことを特徴
とする電力用遮断器の制御信号検出装置。
In the closing and tripping control circuit of a power circuit breaker equipped with a closing circuit, a tripping circuit, and a seal-in circuit, a feed-through current transformer for detecting the tripping control current is connected to the tripping circuit and the seal-in circuit. A control signal detection device for a power circuit breaker, characterized in that it is provided on the tripping coil side from the point.
JP63120492A 1988-05-19 1988-05-19 Control signal detection device for power circuit breakers Expired - Lifetime JP2592909B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63120492A JP2592909B2 (en) 1988-05-19 1988-05-19 Control signal detection device for power circuit breakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63120492A JP2592909B2 (en) 1988-05-19 1988-05-19 Control signal detection device for power circuit breakers

Publications (2)

Publication Number Publication Date
JPH01292716A true JPH01292716A (en) 1989-11-27
JP2592909B2 JP2592909B2 (en) 1997-03-19

Family

ID=14787532

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63120492A Expired - Lifetime JP2592909B2 (en) 1988-05-19 1988-05-19 Control signal detection device for power circuit breakers

Country Status (1)

Country Link
JP (1) JP2592909B2 (en)

Also Published As

Publication number Publication date
JP2592909B2 (en) 1997-03-19

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