JP2746951B2 - Protective relay - Google Patents
Protective relayInfo
- Publication number
- JP2746951B2 JP2746951B2 JP63276806A JP27680688A JP2746951B2 JP 2746951 B2 JP2746951 B2 JP 2746951B2 JP 63276806 A JP63276806 A JP 63276806A JP 27680688 A JP27680688 A JP 27680688A JP 2746951 B2 JP2746951 B2 JP 2746951B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- accident
- detection element
- output
- command
- 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
- 230000001681 protective effect Effects 0.000 title description 6
- 238000001514 detection method Methods 0.000 claims description 38
- 230000004913 activation Effects 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、電力系統での事故を検出したとき必要に
応じて遮断指令を出力する保護継電装置に関するもので
ある。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective relay device that outputs a shutdown command as necessary when detecting an accident in a power system.
第２図は例えば、雑誌電気協同研究，第37巻，第１号
に示された従来の距離継電装置の至近端短絡事故時の極
性電圧メモリ消滅対策例を示す回路構成図であり、図に
おいて（1a）は過電流要素（51）が動作したことにより
閉成する出力接点、（２）はモー特性距離方向判定要素
（44M）が動作したことにより閉成する出力接点、
（３）はリアクタンス特性距離方向判定要素（44X1が動
作したことにより閉成する出力接点、（４）は自己保持
回路、（５）は遮断指令出力回路である。これら回路
（４），（５）は上記過電流要素（51）、２種類の距離
方向判定要素（44M），（44X1）の各出力をAND構成した
出力接点（1a），（２），（３）が閉成されたことによ
り動作する。（41）はリレー、（T5）はタイマーであ
る。FIG. 2 is a circuit configuration diagram showing an example of a countermeasure against the disappearance of the polarity voltage memory at the time of a short-circuit at the near end of the conventional distance relay device shown in, for example, Magazine Electric Cooperative Research, Vol. 37, No. 1, In the drawing, (1a) is an output contact that is closed by the operation of the overcurrent element (51), (2) is an output contact that is closed by the operation of the Mo characteristic distance direction determination element (44M),
(3) is an output contact, (4) is self-holding circuit (5) is cutoff command output circuit for closing by reactance characteristic distance direction determination element (44X 1 is operated. These circuits (4), ( 5) The output contacts (1a), (2) and (3) in which the outputs of the overcurrent element (51) and the two types of distance direction determination elements (44M) and (44X 1 ) are ANDed are closed. (41) is a relay and (T5) is a timer.
次に動作について説明する。まず、電力系統に事故が
発生すると、過電流要素（51）が動作して、その出力接
点（1a）が閉成する。事故が距離継電装置の保護区間内
部で発生していれば、２種類の距離方向判定要素（44
M），（44X1）が動作し、夫々の出力接点（２），
（３）が閉成する。上記過電流要素（51）、２種類の距
離方向判定要素（44M），（44X1）の各々の出力接点（1
a），（２），（３）が閉成すると、リレー（41）が動
作してモー特性距離方向判定要素（44M）の出力接点
（２）をバイパスさせる自己保持回路（４）が形成され
る。同時にタイマー（T5）が動作して遮断指令出力回路
（５）が動作し、瞬時動作あるいは限時動作を伴つた遮
断指令が出力され、保護区間の遮断が行われる。Next, the operation will be described. First, when an accident occurs in the power system, the overcurrent element (51) operates, and its output contact (1a) is closed. If an accident has occurred inside the protection zone of the distance relay, two types of distance direction determination elements (44
M) and (44X 1 ) operate, and the respective output contacts (2),
(3) is closed. The output contact (1) of each of the overcurrent element (51), the two types of distance direction determination elements (44M), and (44X 1 )
When a), (2), and (3) are closed, a relay (41) operates to form a self-holding circuit (4) that bypasses the output contact (2) of the mo characteristic distance direction determination element (44M). You. At the same time, the timer (T5) operates and the shutoff command output circuit (5) operates, and a shutoff command accompanied by an instantaneous operation or a timed operation is output, and the protection section is shut off.
ところで、モー特性距離方向判定要素（44M）は電力
系統の電圧を極性電圧に使用しているので、電力系統の
電圧が零，あるいは非常に小さくなるような距離継電装
置の保護区間内部の至近端事故に対しては動作出来なく
なるため、極性電圧メモリ回路を有し、極性電圧が零，
あるいは非常に小さくても動作出来るように一般には回
路構成されている。限時動作を伴つた限時遮断の場合に
はタイマー（T5）の限時動作が完了する前に電力系統の
電圧が零あるいは非常に小さくなるような事故が発生し
ていれば、極性電圧メモリ回路が消滅するためモー特性
距離方向判定要素（44M）が復帰し出力接点（２）は開
放されるが、上記自己保持回路（４）により出力接点
（２）がバイパスされているため、限時動作は継続され
遮断指令が出力される。By the way, since the power characteristic voltage is used as the polarity voltage for the power characteristic voltage direction determining element (44M), the distance inside the protection section of the distance relay device where the voltage of the power system becomes zero or extremely small is used. Because it cannot operate in the near-end accident, it has a polarity voltage memory circuit and the polarity voltage is zero,
Or, the circuit is generally configured so that it can operate even if it is very small. In the case of timed shutdown with timed operation, the polarity voltage memory circuit is extinguished if an accident occurs such that the voltage of the power system becomes zero or very small before the timed operation of the timer (T5) is completed. Therefore, the mo characteristic distance direction judging element (44M) returns and the output contact (2) is opened, but the time limit operation is continued because the output contact (2) is bypassed by the self-holding circuit (4). A shutoff command is output.
従来の保護継電装置は以上のように構成されているの
で、計器用変圧器（線路PD）を使用している場合、第１
回目遮断後の再閉路前には過電流要素（51）、距離方向
判定要素（44M），（44X1）、自己保持回路（４）及び
遮断指令出力回路（５）は復帰している。この状態にお
いて、距離継電装置の保護区間内部の至近端に短絡等事
故が残留していればモー特性距離方向判定要素（44M）
の極性電圧メモリ回路はすでに消滅しており、モー特性
距離方向判定要素は動作しないので再遮断が出来なくな
る等の課題があつた。Since the conventional protective relay is configured as described above, if the instrument transformer (line PD) is used, the first
The overcurrent element (51), the distance direction judging elements (44M) and (44X1), the self-holding circuit (4), and the shutoff command output circuit (5) are restored before the reclose after the first shutoff. In this state, if an accident such as a short circuit remains at the nearest end inside the protection section of the distance relay, the Moh characteristic distance direction determination element (44M)
The polarity voltage memory circuit has already disappeared, and the mo-characteristic distance direction judging element does not operate.
この発明は上記のような課題を解決するためになされ
たもので、距離継電装置の保護区間の再閉路後にモー特
性距離方向判定要素が動作不能となる至近端事故に対し
ても遮断指令を出力することが出来る保護継電装置を得
ることを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and a shut-off command is also provided for a near-end accident in which a mo characteristic distance direction determining element becomes inoperable after a reclosing of a protection section of a distance relay device. It is an object of the present invention to obtain a protective relay device capable of outputting a signal.
〔課題を解決するための手段〕 この発明に係る保護継電装置は、電力系統において事
故が発生したことを検出する事故検出要素、遮断指令が
出力されたことを保持する遮断指令保持回路、保護区間
内部の至近端事故を検出する至近端事故検出要素、この
至近端事故検出要素を起動させるための起動信号を出力
する至近端事故検出要素起動回路、保護区間第１回目遮
断後の再閉路装置からの再閉路信号を受信し、かつ保持
すると共に上記至近端事故検出要素起動回路を制御する
再閉路信号受信回路により構成したものである。Means for Solving the Problems A protection relay device according to the present invention includes an accident detection element for detecting that an accident has occurred in a power system, a shutoff command holding circuit for holding that a shutoff command has been output, a protection A near-end accident detection element for detecting a near-end accident inside the section, a near-end accident detection element activation circuit for outputting a start signal for activating the near-end accident detection element, after the first cutoff of the protection section The reclosing signal from the reclosing device is received and held, and the reclosing signal receiving circuit controls the near-end accident detection element activation circuit.
この発明における事故検出要素は過電流要素などによ
つて構成され、電力系統に事故が発生していることを検
出する。遮断指令保持回路（タイマーT1の常開接点）は
距離方向判定要素などによる遮断指令を再閉路時間以上
継続させることにより再閉路前の継電装置の動作状態を
保持する。至近端事故検出要素は不足電圧検出要素など
により構成され、モー特性距離方向判定要素などの電力
系統の電圧を極性電圧に使用しているため、至近端事故
時に不動作となることがあるような要素の不動作範囲を
検出する。至近端事故検出要素起動回路は線路PDを使用
している場合に、第１回目遮断後の再閉路前に至近端事
故検出要素が動作状態を継続しないように再閉路後に至
近端事故検出要素が判定を始めるよう起動信号を与え
る。再閉路信号受信回路は再閉路装置からの再閉路指令
を受信し、かつ再閉路指令が短時間であつても確実な動
作が出来るように限時復帰を持たせ再閉路が実施された
ことを検出する。The fault detecting element according to the present invention is constituted by an overcurrent element and the like, and detects that a fault has occurred in the power system. The shutoff command holding circuit (normally open contact of the timer T1) holds the operation state of the relay device before the reclose by continuing the shutoff command by the distance direction determination element or the like for the reclose time or more. The near-end accident detection element is composed of an undervoltage detection element and the like, and the voltage of the power system such as the Maw characteristic distance direction judgment element is used for the polar voltage, so it may not operate at the near-end accident The inoperative range of such an element is detected. When the near-end accident detection element activation circuit uses the line PD, the near-end accident detection element must be closed before re-closing after the first interruption so that the near-end accident detection element does not continue operating. An activation signal is provided so that the detection element starts determination. The reclosing signal receiving circuit receives the reclosing command from the reclosing device, and detects that reclosing has been performed with a time-return so that reliable operation can be performed even if the reclosing command is short. I do.
以下、この発明の一実施例を図について説明する。図
中、第２図と同一の部分は同一の符号をもつて図示した
第１図において、（1b）は事故検出要素（51B）が動作
したことにより閉成する出力接点でこの例においては、
例えば、出力接点（1a）と同じ過電流要素（51）により
閉成する出力接点、（T1）はタイマー、（６）はそのタ
イマー（T1）の常開接点（T1a）によつて構成されリレ
ー（41）とタイマー（T5）と同じく出力接点（1a），
（２），（３）が閉成されたことにより動作し、再閉路
時間以上継電装置の動作状態を保持する遮断指令保持回
路、（７）はモー特性距離方向判定要素（44M）が不動
作となる保護区間内部の至近端事故を検出する至近端事
故検出要素（27）が動作したことにより閉成する出力接
点で、この例においては不足電圧要素により閉成する出
力接点、（T2）はタイマーで常開接点（T2a）を有す
る。（８）は再閉路装置からの再閉路条件（52c）を受
信し、かつタイマー（T2）により限時復帰を持たせた再
閉路信号受信回路、（T3）はタイマーで常開接点（T3
a）を有する。（９）は上記事故検出要素（51B）の出力
と再閉路信号受信回路（８）の出力とをAND構成した出
力接点（1b），（T2a）が閉成したことにより動作する
至近端事故検出要素起動回路、（T4）はタイマーで常開
接点（T4a）を有する。（10）は上記至近端事故検出要
素（27）の出力と遮断指令保持回路（６）の出力とをAN
D構成した出力接点（７），（T1a）が閉成したことによ
り動作する再遮断指令出力回路である。An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the same parts as in FIG. 2 are denoted by the same reference numerals, and in FIG. 1, (1b) is an output contact that is closed by the operation of the accident detection element (51B).
For example, an output contact which is closed by the same overcurrent element (51) as the output contact (1a), (T1) is a timer, and (6) is a relay constituted by a normally open contact (T1a) of the timer (T1) Output contact (1a), same as (41) and timer (T5),
(2) and (3) are operated by closing, and the shutoff command holding circuit which holds the operation state of the relay for more than the re-closing time; (7) is a failure of the mo characteristic distance direction determination element (44M). An output contact that is closed by the operation of a near-end accident detection element (27) that detects a near-end accident inside the protection section to be activated. In this example, an output contact that is closed by an undervoltage element; T2) is a timer having a normally open contact (T2a). (8) is a reclosing signal receiving circuit which receives the reclosing condition (52c) from the reclosing device and has a time-return operation by a timer (T2), and (T3) is a normally open contact (T3) by a timer.
a). (9) is a near-end accident that is activated when the output contacts (1b) and (T2a) in which the output of the accident detection element (51B) and the output of the reclosing signal receiving circuit (8) are ANDed are closed. The detection element activation circuit (T4) is a timer and has a normally open contact (T4a). (10) uses the output of the near-end accident detection element (27) and the output of the shutoff command holding circuit (6) as AN
This is a re-cutoff command output circuit that operates when the output contacts (7) and (T1a) configured in D are closed.
次に動作について説明する。まず、電力系統に事故が
発生すると、まず、過電流要素（51）が動作して出力接
点（1a），（1b）が閉成する。事故が距離断電装置の保
護区間内部で発生していれば、２種類の距離方向判定要
素（44M），（44X1）が動作し、出力接点（２），
（３）が閉成する。上記過電流要素（51）距離方向判定
要素（44M），（44X1）の各々の出力接点（1a），
（２），（３）が閉成したことによりモー特性距離方向
判定要素（44M）の出力接点（２）をバイパスさせる自
己保持回路（４）が形成されると同時にタイマー（T5）
が動作して遮断指令出力回路（５）が閉成し遮断指令が
出力され、距離断電装置の保護区間の第１回目遮断が行
われる。そして再閉路装置により再閉路が行われるまで
の無電圧時間の間は、線路PDを使用している場合距離断
電装置に電力系統の電圧が印加されないため、モー特性
距離方向判定要素（44M）の極性電圧メモリ回路は消滅
する。また保護区間が遮断されているため過電流要素
（51）、リアクタンス距離方向判定要素（44X1）は復帰
し、至近端事故検出要素（27）は至近端事故検出要素起
動回路（９）がいまだ動作していないため起動信号を受
け取つておらず復帰している。再閉路後、保護区間内部
の至近端に事故が残留していると過電流要素（51）、リ
アクタンス特性距離方向判定要素（44X1）は動作し出力
接点（1a），（1b），（３）は再び閉成するが、モー特
性距離方向判定要素（44M）は至近端事故のため極性電
圧が零か、あるいは非常に小さく、また極性電圧メモリ
回路が消滅しているため不動作となり出力接点（２）は
開放のままである。出力接点（２）が開放しているため
自己保持回路（４），遮断指令出力回路（５）は動作し
ないが遮断指令保持回路（６）は上記第１回目遮断時に
動作しているためその常開接点は閉成されたままであ
る。さらに再閉路装置からの再閉路条件（52c）を受信
したことにより再閉路信号受信回路（８）が動作しその
常開接点（T2a）が閉成する。上記事故検出要素（51
B）、再閉路信号受信回路（８）の各々の出力接点（1
b），（T2a）が閉成したことにより、タイマー（T3）が
動作して至近端事故検出要素起動回路（９）が動作し、
瞬時動作あるいは限時動作を伴つた至近端事故検出要素
起動信号が至近端事故検出要素（27）に与えられる。こ
の時事故が至近端に残留していると、至近端事故検出要
素（27）が動作して出力接点（７）が閉成しタイマー
（T4）が動作し再遮断指令出力回路（10）が動作し遮断
指令が出力され保護区間の再遮断が行われる。Next, the operation will be described. First, when an accident occurs in the power system, first, the overcurrent element (51) operates to close the output contacts (1a) and (1b). If generated in the protection section inside the accident distance deenergized device, two distance direction determination element (44M), (44X 1) is operated, the output contact (2),
(3) is closed. The output contact (1a) of each of the overcurrent element (51) distance direction determination element (44M) and (44X 1 ),
When the (2) and (3) are closed, a self-holding circuit (4) for bypassing the output contact (2) of the mo characteristic distance direction judging element (44M) is formed, and at the same time, the timer (T5).
Operates to close the cutoff command output circuit (5), output a cutoff command, and perform the first cutoff of the protection section of the distance disconnection device. Then, during the non-voltage time until the reclosing is performed by the reclosing device, since the voltage of the power system is not applied to the distance disconnection device when using the line PD, the mo characteristic distance direction determining element (44M) Of the polarity voltage memory circuit disappears. In addition, since the protection section is cut off, the overcurrent element (51) and the reactance distance direction determination element (44X 1 ) are restored, and the near-end accident detection element (27) is a near-end accident detection element activation circuit (9). However, since it has not yet operated, it has not received a start signal and has returned. After reclosing overcurrent elements as accident near end of the inner protective zone is left (51), the reactance characteristic distance direction determination element (44X 1) Operation to output contact (1a), (1b), ( 3) is closed again, but the Mo characteristic distance direction judging element (44M) becomes inoperable because the polar voltage is zero or very small due to the near-end accident and the polar voltage memory circuit has disappeared. The output contact (2) remains open. Since the output contact (2) is open, the self-holding circuit (4) and the cut-off command output circuit (5) do not operate, but the cut-off command holding circuit (6) operates at the time of the first cut-off. The open contacts remain closed. Further, upon receiving the reclosing condition (52c) from the reclosing device, the reclosing signal receiving circuit (8) operates and the normally open contact (T2a) is closed. The above accident detection element (51
B), each output contact (1) of the reclosing signal receiving circuit (8)
b) When (T2a) is closed, the timer (T3) operates and the near-end accident detection element activation circuit (9) operates.
A near-end accident detection element activation signal accompanied by an instantaneous operation or a timed operation is supplied to the near-end accident detection element (27). At this time, if the accident remains at the near end, the near end accident detecting element (27) operates, the output contact (7) closes, the timer (T4) operates, and the re-cutoff command output circuit (10 ) Operates to output a cutoff command, and the protection section is cut off again.
なお、上記実施例では事故検出要素（51B）に出力接
点（1b）を設けたものを示したが、過電流要素（51）の
出力接点（1a）と共用にして設けてもよい。In the above embodiment, the fault detection element (51B) is provided with the output contact (1b), but may be provided in common with the output contact (1a) of the overcurrent element (51).
また、事故検出要素（51B）の出力接点（1b）に過電
流要素（51）を設けたものを示したが、電力系統の電
圧，電流を入力量として用い、モー特性距離方向判定要
素（44M）のように極性電圧メモリのようなメモリ効果
が必要でなく事故を検出出来る要素を設けてもよい。Although the overcurrent element (51) is provided at the output contact (1b) of the accident detection element (51B), the voltage and current of the power system are used as input amounts, and the mo characteristic distance direction determination element (44M As in the case of (3), an element that does not require a memory effect such as a polarity voltage memory and can detect an accident may be provided.
また、遮断指令出力回路（５）と再遮断指令出力回路
（10）を個別に設けたものを示したが、遮断指令出力回
路（５）への動作指令と再遮断指令出力回路（10）への
動作指令との論理和を取つたものを遮断指令出力回路
（５）へ印加し、遮断指令出力回路（５）と再遮断指令
出力回路（10）を１つにして設けてもよい。In addition, although the cutoff command output circuit (5) and the re-cutoff command output circuit (10) are separately provided, the operation command to the cutoff command output circuit (5) and the re-cutoff command output circuit (10) are provided. A logical sum of the operation command and the operation command is applied to the cutoff command output circuit (5), and the cutoff command output circuit (5) and the re-cutoff command output circuit (10) may be provided as one.
また、至近端事故検出要素起動回路（９）への動作指
令を事故検出要素（51B）及び再閉路信号受信回路
（８）の各々の出力接点（1b），（T2a）のAND構成で、
再遮断指令出力回路（10）への動作指令を至近端事故検
出要素（27）及び遮断指令保持回路（６）の各々の出力
接点（７），（T1a）のAND構成で印加したが至近端事故
検出要素起動回路（９）への動作指令を事故検出要素
（51B）の出力接点（1b）で印加し、再遮断指令出力回
路（10）への動作指令を至近端事故検出要素（27）、遮
断指令保持回路（６）、及び再閉路信号受信回路（８）
の各々の出力接点（７），（T1a），（T2a）のAND構成
で印加してもよい。In addition, an operation command to the near-end accident detection element activation circuit (9) is provided by an AND configuration of the output contacts (1b) and (T2a) of the accident detection element (51B) and the reclosing signal receiving circuit (8).
An operation command to the re-cutoff command output circuit (10) is applied in an AND configuration of the output contacts (7) and (T1a) of the near-end accident detection element (27) and the cutoff command holding circuit (6). An operation command to the near-end accident detection element activation circuit (9) is applied at the output contact (1b) of the accident detection element (51B), and an operation command to the re-cutoff command output circuit (10) is applied to the near-end accident detection element. (27), shutoff command holding circuit (6), and reclosing signal receiving circuit (8)
And (T1a) and (T2a) may be applied in an AND configuration.
以上のようにこの発明によれば、保護継電装置を事故
検出要素、至近端事故検出要素、至近端事故検出要素起
動回路、遮断指令保持回路、再閉路信号受信回路の出力
信号により動作するように回路構成したので、動作条件
が保護区間内部の至近端事故の残留に対してのみ成立す
るため不要遮断の必要がなく、かつ高速度に遮断指令が
出力できる効果がある。As described above, according to the present invention, the protective relay is operated by the output signals of the fault detecting element, the near-end fault detecting element, the near-end fault detecting element activation circuit, the cutoff command holding circuit, and the reclosing signal receiving circuit. Since the operating condition is established only for the residual near-end accident inside the protection section, there is no need for unnecessary shutoff, and there is an effect that a shutoff command can be output at a high speed.
第１図はこの発明の一実施例による保護継電装置の回路
構成図、第２図は従来の保護継電装置の回路構成図であ
る。 図において、（51）は過電流要素、（51B）は事故検出
要素、（44M）はモー特性距離方向判定要素、（44X1）
はリアクタンス特性距離方向判定要素、（５）は遮断指
令出力回路、（６）は遮断指令保持回路、（27）は至近
端事故検出要素、（８）は再閉路信号受信回路、（９）
は至近端事故検出要素起動回路、（10）は再遮断指令出
力回路である。 なお、図中同一符号は同一又は相当部分を示す。FIG. 1 is a circuit configuration diagram of a protection relay device according to an embodiment of the present invention, and FIG. 2 is a circuit configuration diagram of a conventional protection relay device. In the figure, (51) is an overcurrent element, (51B) is an accident detection element, (44M) is a mo characteristic distance direction determination element, and (44X 1 )
Is a reactance characteristic distance direction determining element, (5) is a shutoff command output circuit, (6) is a shutoff command holding circuit, (27) is a near-end accident detecting element, (8) is a reclosing signal receiving circuit, (9)
Is a near-end accident detection element activation circuit, and (10) is a re-cutoff command output circuit. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (1)
応じて遮断指令を出力して系統を遮断し電力系統の保護
をする保護継電装置において、上記電力系統に事故が発
生したことを検出する事故検出要素、上記遮断指令を保
持する遮断指令保持回路、上記保護継電装置設置点の至
近端の事故を検出する至近端事故検出要素、この至近端
事故検出要素に起動信号を与える至近端事故検出要素起
動回路、及び系統保護区間の遮断後、再閉路装置からの
再閉路信号を受信して保持すると共に上記至近端事故検
出要素起動回路を制御する再閉路信号受信回路を備え、
上記系統保護区間の再閉路後、事故が保護継電装置設置
点の至近端に残留している場合、上記至近端事故検出要
素起動回路からの起動信号により動作する至近端事故検
出要素を介して該電力系統に遮断指令を出力することを
特徴とする保護継電装置。When an accident is detected in an electric power system, an accident is generated in the electric power system in a protection relay device that outputs an interruption command as necessary to shut off the system and protect the electric power system. An element for detecting an accident, an interruption command holding circuit for retaining the above interruption command, a near-end accident detection element for detecting an accident at the nearest end of the protection relay device installation point, and starting up to this nearest-end accident detection element A near-end accident detection element activation circuit for providing a signal, and a re-closing signal for receiving and holding the re-closure signal from the reclosing device after the system protection section is shut off and controlling the near-end accident detection element activation circuit Equipped with a receiving circuit,
After the re-closing of the system protection section, if an accident remains at the nearest end of the protection relay installation point, the near-end accident detection element that is activated by a start signal from the near-end accident detection element starting circuit. A protection relay device for outputting a shut-off command to the power system via the power relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63276806A JP2746951B2 (en) | 1988-10-31 | 1988-10-31 | Protective relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63276806A JP2746951B2 (en) | 1988-10-31 | 1988-10-31 | Protective relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02123913A JPH02123913A (en) | 1990-05-11 |
| JP2746951B2 true JP2746951B2 (en) | 1998-05-06 |
Family
ID=17574645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63276806A Expired - Fee Related JP2746951B2 (en) | 1988-10-31 | 1988-10-31 | Protective relay |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2746951B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0636648B2 (en) * | 1987-02-27 | 1994-05-11 | 三菱電機株式会社 | Protective relay |
-
1988
- 1988-10-31 JP JP63276806A patent/JP2746951B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02123913A (en) | 1990-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2746951B2 (en) | Protective relay | |
| JP2798885B2 (en) | Power fluctuation detection device for power system | |
| JPH0636648B2 (en) | Protective relay | |
| JP3335788B2 (en) | Power system protection controller | |
| JP3096082B2 (en) | Reclosing circuit of PCM current differential relay | |
| JP3562674B2 (en) | Transformer protection relay | |
| JP2003153430A (en) | Network protector | |
| JPH0112510Y2 (en) | ||
| JP2644987B2 (en) | Direction comparison relay | |
| JP2001037072A (en) | Protection relay device | |
| JPH0424798Y2 (en) | ||
| JPS6237402Y2 (en) | ||
| JPH05289718A (en) | Operation sequence temporary restoration device | |
| JP2001103655A (en) | Transmission line protective relay | |
| JPS6318412B2 (en) | ||
| JPS6336203B2 (en) | ||
| JPH04299016A (en) | Reclosing system | |
| JPS6041533B2 (en) | Protective relay device | |
| JPH03118718A (en) | Differential relay device malfunction prevention method | |
| JPH01274613A (en) | Overcurrent protective circuit | |
| JP2001103666A (en) | Opening phase-controlling device and dispersion-type- controlling device incorporating it | |
| JPS63114525A (en) | Current differential relay | |
| JPH02155134A (en) | Throw-in command circuit for breaker | |
| JPH03245423A (en) | Protective relay | |
| JPH0518237U (en) | Two-line combined transmission line protection relay |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |