JPH0254009B2 - - Google Patents

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は自動点検回路を備えた保護継断装置に
関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a protective connecting and disconnecting device equipped with an automatic inspection circuit.

〔発明の従来技術〕[Prior art to the invention]

一般に最近の保護継電装置は保護継電装置自身
の信頼性向上および保守の省力化を目的として自
動監視装置を備えているものが殆んどである。こ
の自動監視装置は常時監視回路と自動点検回路に
より構成されているのが通常である。常時監視回
路は平常時に装置又は継電器の誤動作側の不良を
検出し、また自動点検回路は点検時に点検対象へ
動作摸擬入力を与えて点検対象の動作復帰が正し
く行なわれることを確認するもので、この自動点
検回路は最近増々その対象範囲を拡大し、充実し
つつあるのが現状である。 In general, most recent protective relay devices are equipped with an automatic monitoring device for the purpose of improving the reliability of the protective relay device itself and saving labor for maintenance. This automatic monitoring device usually consists of a constant monitoring circuit and an automatic inspection circuit. The constant monitoring circuit detects malfunctioning equipment or relays during normal operation, and the automatic inspection circuit provides a simulated operation input to the inspection target during inspection to confirm that the inspection target returns to normal operation. The current situation is that the scope of this automatic inspection circuit has recently been expanded and improved.

ところで、従来の点検回路を備えた保護継電装
置としては、例えば第１図ａ〜ｃに示すように構
成されている。第１図ａは点検回路を含む主回路
構成を示すもので、第１の継電器１の一方の入力
端は図示しない補助継電器の常開接点８ａ１を介
して、また第２の継電器２の一方の入力端は図示
しない補助継電器の常開接点９ａ２を介してそれ
ぞれ点検回路７の一端に接続され、さらにこれら
第１および第２の継電器１，２の他方の入力端は
図示しない解除用補助継電器の常閉接点１５ｂを
共通に介して点検電源７の他端に接続されてい
る。また第１の継電器１の動作判定部の出力端は
ドライバ３および補助継電器５を直列に介して制
御電源母線Ｐに接続され、第２の継電器２の動作
判定部の出力端はドライバ４および補助継電器６
を直列に介して制御電源母線Ｐに接続されてい
る。さらに第１の継電器１の動作判定部の出力端
は第１の継電器１が非点検中の論理値“１”なる
条件信号が一方の入力端に加えられるアンド回路
３１の他方の入力端に接続され、第２の継電器２
の動作判定部の出力端は第２の継電器２が非点検
中のとき論理値“１”なる条件信号が一方の入力
端に加えられるアンド回路３２の他方の入力端に
接続されている。そしてこれらアンド回路３１，
３２の出力はオア回路３３に加えられ、その出力
が論理値“１”のとき、点検中止信号として送出
されるようになつている。 By the way, a conventional protective relay device equipped with an inspection circuit is constructed as shown in FIGS. 1a to 1c, for example. FIG. 1a shows the main circuit configuration including the inspection circuit, in which one input terminal of the first relay 1 is connected to one input terminal of the second relay 2 via a normally open contact 8a1 of an auxiliary relay (not shown). The input ends are each connected to one end of the inspection circuit 7 via normally open contacts 9a2 of an auxiliary relay (not shown), and the other input ends of the first and second relays 1 and 2 are connected to an auxiliary release relay (not shown). They are connected to the other end of the inspection power supply 7 via a normally closed contact 15b. The output end of the operation determination section of the first relay 1 is connected to the control power supply bus P via the driver 3 and the auxiliary relay 5 in series, and the output end of the operation determination section of the second relay 2 is connected to the driver 4 and the auxiliary relay 5 in series. Relay 6
It is connected to the control power supply bus P through series. Further, the output terminal of the operation determination section of the first relay 1 is connected to the other input terminal of an AND circuit 31, which receives a condition signal having a logical value of "1" when the first relay 1 is not being inspected. and the second relay 2
The output terminal of the operation determination section is connected to the other input terminal of an AND circuit 32 to which a condition signal having a logical value of "1" is applied to one input terminal when the second relay 2 is not being inspected. And these AND circuits 31,
The output of 32 is applied to an OR circuit 33, and when the output has a logical value of "1", it is sent as an inspection stop signal.

第１図ｂはしや断器の引き外し回路の構成を示
すもので、しや断器１２の引き外しコイル１０の
一端は試験用端子１１、補助継電器５，６の第１
の常閉接点５ａ１，６ａ１および点検中にトリツ
プロツクするための図示しない補助継電器の常閉
接点１６ｂを直列に介して制御電源母線Ｐに接続
され、また引き外しコイル１０の他端はしや断器
１２の補助常開接点１０ａを介して制御電源母線
Ｎに接続されている。 Figure 1b shows the configuration of the tripping circuit of the breakout switch 12, where one end of the tripping coil 10 of the breakout switch 12 is connected to the test terminal 11, and the first terminal of the auxiliary relays 5 and 6.
The other end of the tripping coil 10 is connected to the control power bus P through the normally closed contacts 5a1 and 6a1 of the auxiliary relay (not shown) and the normally closed contact 16b of an auxiliary relay (not shown) for trip-locking during inspection. It is connected to the control power supply bus N via twelve auxiliary normally open contacts 10a.

第１図ｃは点検結果を確認するための回路で、
点検結果回路１５の第１の入力端に補助継電器５
の第２の常開接点５ａ２が接続され、また点検結
果確認回路１５の第２の入力端には補助継電器６
の第２の常開接点６ａ２が接続され、これらの常
開接点５ａ２，６ａ２が閉じると第１の継電器
１、第２の継電器２が正常であることを確認でき
るようになつている。 Figure 1c shows the circuit for checking the inspection results.
An auxiliary relay 5 is connected to the first input terminal of the inspection result circuit 15.
The second normally open contact 5a2 of the inspection result confirmation circuit 15 is connected to the second input terminal of the inspection result confirmation circuit 15, and the auxiliary relay 6
The second normally open contact 6a2 is connected, and when these normally open contacts 5a2, 6a2 are closed, it can be confirmed that the first relay 1 and the second relay 2 are normal.

次に第１図ａ〜ｃに示す従来装置の動作につい
て述べる。今、電力系統に事故が発生すると、図
示はしていないがそのときの系統の電気量が第１
の継電器１および第２の継電器２に入力され、こ
れら両継電器１，２が動作する。これら両継電器
１，２が動作すると、その動作判定部の出力がド
ライバ３，４を介して補助継電器５，６に加わ
り、該補助継電器５，６を動作させる。しや断器
引外し回路では補助継電器５，６の第１の常開接
点５ａ１，６ａ１が閉路すると、点検中トリツプ
ロツク用補助継電器の常閉接点１６ｂは閉路した
ままなので、しや断器１２が投入された状態にお
いて、その補助常開接点１０ａを閉路しているた
め、制御電源母線Ｐ，Ｎ間が閉成され、引外しコ
イル１０へ、引外し電流が流れ、しや断器の引外
しが行なわれる。 Next, the operation of the conventional device shown in FIGS. 1a to 1c will be described. Now, if an accident occurs in the power system, the amount of electricity in the system at that time will be the first, although it is not shown in the diagram.
The signal is input to relay 1 and second relay 2, and both relays 1 and 2 operate. When both relays 1 and 2 operate, the output of the operation determining section is applied to the auxiliary relays 5 and 6 via the drivers 3 and 4, causing the auxiliary relays 5 and 6 to operate. When the first normally open contacts 5a1 and 6a1 of the auxiliary relays 5 and 6 are closed in the edge breaker tripping circuit, the normally closed contact 16b of the auxiliary relay for trip lock during inspection remains closed, so the edge breaker 12 is closed. In the closed state, the auxiliary normally open contact 10a is closed, so the connection between the control power supply buses P and N is closed, a tripping current flows to the tripping coil 10, and the breaker is tripped. will be carried out.

次に保護継電装置の自動点検について述べる
に、この時は引外し回路の点検中トリツプロツク
用補助継電器の常閉接点１６ｂを開路しておき、
この状態で補助継電器の常開接点８ａ１を閉路し
て点検電源７より第１の継電器１に点検入力を与
えて補助継電器５を動作させる。このとき引外し
回路において補助継電器５の第１の常開接点５ａ
１が閉路するが前述したように常閉接点１６ｂの
開路でトリツプロツクされており、また補助継電
器６の第１の常開接点６ａ１が閉路していないこ
とからしや断器を引外すことはない。一方、点検
結果確認回路１５に接続されている補助継電器５
の第２の常開接点５ａ２も閉路し、この接点５ａ
２の閉路により第１の継電器５の動作を確認した
後、点検電源回路に設けられている図示しない補
助継電器の常閉接点１５ｂを開路して点検入力を
切り、補助継電器５が正常に復帰したことをその
第２の常開接点５ａ２が開路することで判定し
て、第２の継電器１の点検を実施する。次に第２
の継電器２に対する点検についても、図示しない
補助継電器の常開接点９ａ１を閉路、開路によ
り、補助継電器６の第２の常開接点６ａ２が閉
路、開路することを確認することで同様に点検を
実施し、点検の終了後は、しや断器引き外し回路
に設けられている図示しないトリツプロツク用補
助継電器の常閉接点１６ｂを閉路し、トリツプロ
ツクを解除する。 Next, we will discuss the automatic inspection of the protective relay device. At this time, during the inspection of the trip circuit, the normally closed contact 16b of the trip lock auxiliary relay is opened.
In this state, the normally open contact 8a1 of the auxiliary relay is closed, and a check input is applied to the first relay 1 from the check power supply 7, so that the auxiliary relay 5 is operated. At this time, the first normally open contact 5a of the auxiliary relay 5 in the tripping circuit
1 is closed, but as mentioned above, it is trip-locked by the opening of the normally closed contact 16b, and since the first normally open contact 6a1 of the auxiliary relay 6 is not closed, the breaker will not be tripped. . On the other hand, the auxiliary relay 5 connected to the inspection result confirmation circuit 15
The second normally open contact 5a2 is also closed, and this contact 5a
After confirming the operation of the first relay 5 by closing step 2, the normally closed contact 15b of the auxiliary relay (not shown) provided in the inspection power supply circuit was opened to cut off the inspection input, and the auxiliary relay 5 returned to normal. This is determined by the fact that the second normally open contact 5a2 is open, and the second relay 1 is inspected. Then the second
Regarding the inspection of the relay 2, the same inspection is carried out by confirming that the second normally open contact 6a2 of the auxiliary relay 6 is closed and opened by closing and opening the normally open contact 9a1 of the auxiliary relay (not shown). However, after the inspection is completed, the normally closed contact 16b of the auxiliary trip lock relay (not shown) provided in the circuit breaker tripping circuit is closed to release the trip lock.

次に自動点検中に系統事故が発生した場合であ
るが、この場合には点検中でない継電器が事故を
検出できることから第１の継電器１の点検中は第
２の継電器２が非点検中であることから、この第
２の継電器２の動作判定出力のアンド条件が成立
し、アンド回路３２、オア回路３３を経て点検中
止の信号を発生する。また、第２の継電器２の点
検中についても同様でアンド回路３１、オア回路
３３を経て点検中止の信号を発生する。この点検
中止の信号で図示しない補助継電器の常開接点８
ａ１又は９ａ１を開路して点検入力を直ちに断つ
と同時にトリツプロツク用補助継電器の常閉接点
１６ｂによるトリツプロツクを解除して装置を平
常の状態に戻してしや断器の引外しに備える。 Next, there is a case where a system fault occurs during automatic inspection, but in this case, the relay that is not being inspected can detect the fault, so while the first relay 1 is being inspected, the second relay 2 is not being inspected. Therefore, the AND condition of the operation determination output of the second relay 2 is satisfied, and a signal to cancel the inspection is generated via the AND circuit 32 and the OR circuit 33. Similarly, during the inspection of the second relay 2, a signal to cancel the inspection is generated via the AND circuit 31 and the OR circuit 33. Normally open contact 8 of the auxiliary relay (not shown)
A1 or 9a1 is opened to immediately cut off the inspection input, and at the same time, the trip lock by the normally closed contact 16b of the trip lock auxiliary relay is released to return the device to its normal state and prepare for the tripping of the shingle breaker.

〔背景技術の問題点〕[Problems with background technology]

ところで、かかる構成の保護継電装置におい
て、しや断器の引外しを行なう場合は、補助継電
器５，６の第１の常開接点５ａ１，６ａ１が確実
に閉路する必要があり、また、平常時には、これ
ら第１の常開接点５ａ１，６ａ１が確実に開路し
ていることも重要である。しかるに、しや断器引
き外し回路に流れる引外し電流は数アンペアから
10数アンペアあるため、補助継電器５，６の第１
の常開接点５ａ１，６ａ１の開、閉時にチヤタリ
グ等により発生するアークで、接点が損傷し、接
触不良あるいは接点溶着の原因となる。また、自
動点検時においては、引外し回路に用いている第
１の常開接点とは異なる第２の常開接点５ａ２，
６ａ２の開路、閉路自体を確認しているため引外
し回路に用いている第１の常開接点そのものの不
良を検出することはできない。そこで自動点検時
に第１および第２の継電器１，２を同時に動作さ
せる点検入力を与えて補助継電器５，６を動作さ
せ、その第１の常開接点５ａ１，６ａ１の開路、
閉路を確認すればよいが、このような点検中に系
統事故が発生してもアンド回路３１，３２のアン
ド条件が不成立のためその事故を検出することが
できなくなり、点検を直ちに中止してしや断器の
引外しに備えることが不可能となる。 By the way, in the protective relay device having such a configuration, when tripping the breaker, the first normally open contacts 5a1 and 6a1 of the auxiliary relays 5 and 6 must be reliably closed. Sometimes, it is also important that these first normally open contacts 5a1, 6a1 are reliably opened. However, the tripping current flowing through the circuit breaker tripping circuit ranges from several amperes to
Since there are about 10 amperes, the first of auxiliary relays 5 and 6
When the normally open contacts 5a1 and 6a1 are opened and closed, arcs generated by chatter etc. can damage the contacts, causing poor contact or welding of the contacts. In addition, during automatic inspection, a second normally open contact 5a2, which is different from the first normally open contact used in the tripping circuit,
Since the opening and closing of 6a2 itself is confirmed, it is not possible to detect a defect in the first normally open contact itself used in the tripping circuit. Therefore, during automatic inspection, an inspection input is given to operate the first and second relays 1 and 2 simultaneously, the auxiliary relays 5 and 6 are operated, and the first normally open contacts 5a1 and 6a1 are opened.
It is sufficient to confirm that the circuit is closed, but even if a system fault occurs during such an inspection, the fault cannot be detected because the AND conditions of AND circuits 31 and 32 are not satisfied, and the inspection must be stopped immediately. It becomes impossible to prepare for disconnection or tripping of the disconnector.

〔発明の目的〕[Purpose of the invention]

本発明は上記のような欠点を除去するためにな
されたもので、その目的はしや断器引き外し回路
に用いている接点に至るまでの点検が可能にな
り、また引き外し条件が成立するか否かの判定が
でき、さらに点検中の系統事故も直ちに検出して
点検を中止することができる信頼性の高い点検回
路を備えた保護継電装置を提供することを目的と
する。 The present invention was made to eliminate the above-mentioned drawbacks, and its purpose is to make it possible to inspect the contacts used in the disconnector tripping circuit, and to ensure that the tripping conditions are met. It is an object of the present invention to provide a protective relay device equipped with a highly reliable inspection circuit that can determine whether or not a system failure occurs during an inspection, and can also immediately detect a system failure during an inspection and stop the inspection.

〔発明の概要〕[Summary of the invention]

本発明はかかる目的を達成するため、電力系統
の事故を検出すると動作する第１の継電器および
第２の継電器の動作出力によりしや断器に引き外
し指令を与えて電力系統を保護する保護継電装置
において、第１の継電器、第２の継電器の動作出
力により動作する補助継電器の接点をしや断器の
引き外し条件としてこれらの接点を点検する場
合、系統事故を検出する第１および第２の継電器
の動作判定部以降の出力用補助継電器の少なくと
も一つを動作指令により動作させてしや断器引き
外し条件回路を含む自動点検を実施できる構成と
して点検中の系統事故を第１又は第２の継電器の
動作判定部の出力により検出して点検中止を直ち
に行なえるようにしたものである。 In order to achieve such an object, the present invention provides a protective relay that protects the power system by giving a tripping command to the circuit breaker using the operating outputs of a first relay and a second relay that operate when a fault in the power system is detected. In electrical equipment, when inspecting the contacts of the auxiliary relay operated by the operating output of the first relay and the second relay, or as a condition for tripping the disconnector, the first and second relays that detect a system fault are inspected. At least one of the output auxiliary relays after the operation determination section of the second relay is activated by the operation command, and the system fault under inspection is configured to be able to perform automatic inspection including the circuit breaker tripping condition circuit. This is detected by the output of the operation determining section of the second relay, and the inspection can be immediately canceled.

〔発明の実施例〕[Embodiments of the invention]

以下本発明の一実施例を図面を参照して説明す
る。第２図ａ〜ｃは本発明装置の構成例を示すも
ので、第１図ａ〜ｃと同一部分には同一符号を付
けてその説明を省略し、ここでは異なる部分につ
いて述べる。本実施例では点検回路を含む主回路
構成として、第２図ａに示すように第１の継電器
１の動作出力により動作する補助継電器５に対し
て自動点検の条件で動作指令を与える動作指令回
路DSCを設け、その出力を第１の継電器１の出
力とともにオア回路３４を介してドライバ３に入
力できるようにするものである。また、しや断器
引き外し回路の構成としては第２図ｂに示すよう
にトリツプロツク用補助継電器の常閉接点１６ｂ
と並列に限流抵抗１８、補助継電器１７および点
検電源回路に設けられた常開接点９ａ１と連動す
る図示しない補助継電器の常開接点９ａ２の直列
回路を接続する構成とするものである。さらに点
検結果を確認するための回路構成としては第２図
ｃに示すように補助継電器６の第２の常開接点６
ａ２に代えて補助継電器１７の常開接点１７ａの
閉路条件で第２の継電器２の正常動作を確認する
構成とするものである。 An embodiment of the present invention will be described below with reference to the drawings. FIGS. 2a to 2c show an example of the configuration of the apparatus of the present invention, and the same parts as in FIGS. 1a to 1c are given the same reference numerals, and the explanation thereof will be omitted, and only the different parts will be described here. In this embodiment, as a main circuit configuration including an inspection circuit, as shown in FIG. A DSC is provided, and its output can be input to the driver 3 via an OR circuit 34 together with the output of the first relay 1. In addition, as shown in Fig. 2b, the structure of the circuit breaker tripping circuit is as shown in Fig. 2b.
A series circuit of a current limiting resistor 18, an auxiliary relay 17, and a normally open contact 9a2 of an auxiliary relay (not shown) that operates in conjunction with a normally open contact 9a1 provided in the inspection power supply circuit is connected in parallel with the auxiliary relay 17. Furthermore, as a circuit configuration for confirming the inspection results, as shown in FIG. 2c, the second normally open contact 6 of the auxiliary relay 6
In place of a2, the normal operation of the second relay 2 is confirmed under the closed condition of the normally open contact 17a of the auxiliary relay 17.

次に第２図に示す実施例装置の動作を説明す
る。第２図ａ〜ｃにおいて、系統事故時のしや断
器引き外し時の動作は第１図ａ〜ｃの場合と同様
となるため、省略する。また第１の継電器１の点
検時の動作についても同様のため省略し、ここで
は第２の継電器２の点検時の動作について述べ
る。 Next, the operation of the embodiment shown in FIG. 2 will be explained. In FIGS. 2a to 2c, the operation when the breaker is tripped in the event of a system fault is the same as that in FIGS. 1a to 1c, and will therefore be omitted. Furthermore, since the operation at the time of inspection of the first relay 1 is the same, a description thereof will be omitted, and the operation at the time of inspection of the second relay 2 will be described here.

今、第２の継電器２に対して点検を実施するに
は、まず図示しない補助継電器を動作させてその
常開接点９ａ１を閉路し、第２の継電器２に点検
入力を与えて補助継電器６を動作させる。このと
き、引き外し回路においては上記常開接点９ａ１
と連動して常開接点９ａ２が同時に閉路する。こ
こで、動作指令回路DSCよりオア回路３４、ド
ライバ３を介して補助継電器５に動作指令を与え
てこの補助継電器５を動作させる。したがつて、
しや断器引き外し回路においてはこれら補助継電
器５，６の常開接点５ａ１，６ａ１が閉路した時
点で限流抵抗１８で制限された微小電流が補助継
電器１７のコイル、常開接点９ａ２，５ａ１，６
ａ１、試験用端子１１、引き外しコイル１０およ
びその補助常開接点１０ａを経由して流れ、補助
継電器１７を動作させる。しかし、このときの微
小電流は引き外しコイル１０の感動電流以下のた
め、しや断器も引き外すことはない。 Now, in order to inspect the second relay 2, first operate the auxiliary relay (not shown) to close its normally open contact 9a1, and then apply the inspection input to the second relay 2 to turn on the auxiliary relay 6. make it work. At this time, in the tripping circuit, the normally open contact 9a1
In conjunction with this, the normally open contact 9a2 closes at the same time. Here, an operation command is given to the auxiliary relay 5 from the operation command circuit DSC via the OR circuit 34 and the driver 3 to operate the auxiliary relay 5. Therefore,
In the circuit breaker tripping circuit, when the normally open contacts 5a1, 6a1 of these auxiliary relays 5, 6 are closed, the minute current limited by the current limiting resistor 18 flows through the coil of the auxiliary relay 17 and the normally open contacts 9a2, 5a1. ,6
a1, the test terminal 11, the tripping coil 10, and its auxiliary normally open contact 10a to operate the auxiliary relay 17. However, since the minute current at this time is less than the current of the tripping coil 10, the breaker will not be tripped either.

上記補助継電器１７が動作すると、その常開接
点１７ａが閉路するので、点検結果確認回路１５
は第２の継電器５としや断器引き外し回路におけ
る補助継電器５，６の常開接点５ａ１，６ａ１の
動作確認ができる。そのことを確認した後、解除
用補助継電器の常閉接点１５ｂを開路して点検電
源回路を断にして第２の継電器２、補助継電器６
を復帰させる。これによりしや断器引き外し回路
においては補助継電器６の常開接点６ａ１が開路
することにより、補助継電器１７が復帰し、その
こと点検結果確認回路１５によりその常開接点１
７ａが開路したことを条件に常開接点６ａ１が溶
着していないことも併せて確認できる。続いて、
解除用補助継電器を復帰させてその常閉接点１５
ｂを閉路すると、再び点検入力が第２の継電器２
に与えられ、その動作出力により補助継電器６が
動作してその常開接点６ａ１を閉路し、再度補助
継電器１７を動作させる。ここで、動作指令回路
DSCの動作指令を除外すると、補助継電器５が
復帰し、その常開接点５ａ１の開路により補助継
電器１７が復帰したことを確認して解除用補助継
電器を動作させてその常開接点１５ｂを開路し点
検を終了する。 When the auxiliary relay 17 operates, its normally open contact 17a closes, so the inspection result confirmation circuit 15
It is possible to check the operation of the normally open contacts 5a1 and 6a1 of the auxiliary relays 5 and 6 in the second relay 5 and the breaker tripping circuit. After confirming this, the normally closed contact 15b of the auxiliary relay for release is opened to disconnect the inspection power supply circuit, and the second relay 2 and the auxiliary relay 6
to be reinstated. As a result, the normally open contact 6a1 of the auxiliary relay 6 is opened in the breaker tripping circuit, and the auxiliary relay 17 is restored, and the inspection result confirmation circuit 15 confirms that the normally open contact 1
It can also be confirmed that the normally open contact 6a1 is not welded under the condition that 7a is opened. continue,
Reset the auxiliary release relay and close its normally closed contact 15.
When b is closed, the inspection input is again applied to the second relay 2.
The operation output operates the auxiliary relay 6 to close its normally open contact 6a1, and the auxiliary relay 17 is operated again. Here, the operation command circuit
When the DSC operation command is removed, the auxiliary relay 5 is restored, and after confirming that the auxiliary relay 17 has been restored by opening its normally open contact 5a1, the auxiliary release relay is operated to open its normally open contact 15b. Finish inspection.

これらの点検中に系統事故が発生しても第１の
継電器１の点検中には第２の継電器の動作判定出
力により、また第２の継電器２の点検中には第１
の継電器１の動作判定出力によりアンド回路３１
又は３２のアンド条件が成立するので、その出力
を点検中止信号としてオア回路３３を介して送出
すれば、直ちに点検を中止することが可能であ
る。 Even if a system fault occurs during these inspections, the operation judgment output of the second relay will be used while the first relay 1 is being inspected, and the first relay will be
The AND circuit 31 is activated by the operation judgment output of the relay 1.
Or, since the AND condition of 32 is satisfied, if the output is sent through the OR circuit 33 as an inspection stop signal, it is possible to immediately stop the inspection.

次に本発明の他の実施例を第３図ａ〜ｃにより
説明するに、第１図ａ〜ｃおよび第２図ａ〜ｃと
同一部分には同一符号を付けてその説明を省略
し、ここでは異なる部分について述べる。本実施
例では点検回路を含む主回路構成として第３図ａ
に示すように、第１の継電器１の動作出力により
動作する補助継電器５、第２の継電器２の動作出
力により動作する補助継電器６に対して自動点検
の条件で動作指令を与える動作指令回路DSC１，
DSC２をそれぞれ設け、動作指令回路DSC１の
出力を第１の継電器１の出力とともにオア回路３
４を介してドライバ３に、また動作指令回路
DSC１の出力を第２の継電器２の出力とともに
オア回路３５を介してドライバ４にそれぞれ入力
できるようにするものである。またしや断器引き
外し回路の構成としては第３図ｂに示すように、
トリツプロツク用補助継電器の常閉接点１６ｂと
並列に限流抵抗１８、補助継電器１７およびしや
断器引き外し条件の点検時に動作する図示しない
補助継電器の常開接点１９ａの直列回路を接続す
る構成とするものである。さらに点検結果を確認
するための回路構成としては第３図ｃに示すよう
に第１図ｃの接点入力構成に加えて補助継電器１
７の常開接点１７ａの閉路条件で補助継電器５，
６の第１の常開接点５ａ１，６ａ１の開、閉状態
を確認できる構成とするものである。 Next, another embodiment of the present invention will be described with reference to FIGS. 3a to 3c, in which the same parts as in FIGS. Here we will discuss the different parts. In this embodiment, the main circuit configuration including the inspection circuit is shown in Figure 3a.
As shown in FIG. 1, an operation command circuit DSC1 provides an operation command under automatic inspection conditions to the auxiliary relay 5 operated by the operation output of the first relay 1 and the auxiliary relay 6 operated by the operation output of the second relay 2. ，
A DSC2 is provided, and the output of the operation command circuit DSC1 is connected to the OR circuit 3 together with the output of the first relay 1.
4 to the driver 3, and the operation command circuit
The output of the DSC 1 and the output of the second relay 2 can be respectively input to the driver 4 via the OR circuit 35. The configuration of the circuit breaker tripping circuit is as shown in Figure 3b.
A configuration in which a series circuit of a current limiting resistor 18, an auxiliary relay 17, and a normally open contact 19a of an auxiliary relay (not shown) that operates when checking the conditions for tripping the circuit breaker is connected in parallel with the normally closed contact 16b of the auxiliary relay for the trip lock. It is something to do. Furthermore, as a circuit configuration for confirming the inspection results, as shown in Figure 3c, in addition to the contact input configuration of Figure 1c, an auxiliary relay 1
When the normally open contact 17a of No. 7 is closed, the auxiliary relay 5,
The structure is such that it is possible to confirm whether the open or closed states of the six normally open contacts 5a1 and 6a1 are open or closed.

次に第３図に示す実施例装置の動作について説
明する。第３図ａ〜ｃにおいて、系統事故時のし
や断器引き外し時の動作および第１の継電器１、
第２の継電器２の自動点検についても第１図ａ〜
ｃの場合と同様であるため省略し、ここではしや
断器引き外し回路に用いられている補助継電器
５，６の第１の常開接点５ａ１，６ａ１の点検に
おいて特徴があるためその場合の動作を説明す
る。 Next, the operation of the embodiment shown in FIG. 3 will be explained. In FIGS. 3a to 3c, the operation of the breaker tripping in the event of a system fault and the operation of the first relay 1,
Automatic inspection of the second relay 2 is also shown in Figure 1 a~
Since it is the same as case c, it will be omitted, and here we will explain the characteristics in the inspection of the first normally open contacts 5a1, 6a1 of the auxiliary relays 5, 6 used in the circuit breaker tripping circuit. Explain the operation.

今、しや断器引き外し回路において、補助継電
器５，６の第１の常開接点５ａ１，６ａ１がしや
断器引き外しの条件が成立するか否かを点検する
には、まず図示しない補助継電器の常開接点１９
ａ閉路し、次いで動作指令回路DSC１，DSC２
から動作指令を補助継電器５，６にそれぞれ与え
る。この時しや断器引き外し回路はトリツプロツ
ク用補助継電器の常閉接点１６ｂが開路している
ことは言うまでもない。 Now, in the circuit breaker tripping circuit, in order to check whether the first normally open contacts 5a1, 6a1 of the auxiliary relays 5, 6 meet the conditions for tripping the circuit breaker, first, it is not shown in the figure. Normally open contact 19 of the auxiliary relay
a Closed, then operation command circuits DSC1, DSC2
gives operation commands to auxiliary relays 5 and 6, respectively. Needless to say, at this time, the normally closed contact 16b of the trip lock auxiliary relay is open in the disconnection trip circuit.

上記補助継電器５，６が動作指令により動作す
ると、その第１の常開接点５ａ１，６ａ１が閉路
するため、補助継電器１７のコイルに限流抵抗１
８により制限された微小電流が流れ、その電流に
より補助継電器１７が動作する。この補助継電器
１７が動作するとその常開接点１７ａが閉路する
ため、点検結果確認回路１５では補助継電器５，
６の第１の常開接点５ａ１，６ａ１が共に閉路し
ていることが確認できる。第１の常開接点５ａ
１，６ａ１の閉路確認後、動作指令回路DSC１
の動作指令の送出を停止して補助継電器５を復帰
させると、その第１の常開接点５ａ１の開路によ
り補助継電器１７が復帰し、その常開接点１７ａ
が開路することで、補助継電器５の復帰を確認す
る。続いて、動作指令回路DSC１より再び動作
指令を補助継電器５に与えるとともに動作指令回
路DSC２からの動作指令の送出を停止して補助
継電器６を復帰する。この場合にも同様に、補助
継電器１７の復帰によりその常開接点１７ａが開
路するので、そのことを点検結果確認回路１５で
確認し点検を終了する。以上の動作復帰の確認か
ら、補助継電器５，６の常開設点５ａ１，６ａ１
が接触不良も溶着もないことが確認できる。また
この点検中に系統事故が発生した場合には第１お
よび第２の継電器１，２に点検入力が印加されて
いないため、点検中の事故で、事故点が保護区間
外であれば、第１の継電器１又は第２の継電器２
のいずれか一方が動作し、また保護区間内であれ
ば、双方の継電器が動作判定出力を送出する。し
たがつて、これらの出力と第１の継電器１が非点
検中、第２の継電器２が非点検中であることの条
件信号とのアンド条件がアンド回路３１又はアン
ド回路３２あるいは双方で成立することになり、
その出力をオア回路３３を経て点検中止の信号と
して送出することにより直ちに点検を中止するこ
とができ、しや断器の引外しに備えることが可能
である。 When the auxiliary relays 5 and 6 operate according to the operation command, their first normally open contacts 5a1 and 6a1 are closed, so the coil of the auxiliary relay 17 is connected to the current limiting resistor 1.
A minute current limited by 8 flows, and the auxiliary relay 17 is operated by the current. When this auxiliary relay 17 operates, its normally open contact 17a closes, so in the inspection result confirmation circuit 15, the auxiliary relay 5,
It can be confirmed that the first normally open contacts 5a1 and 6a1 of No. 6 are both closed. First normally open contact 5a
After confirming the closure of 1 and 6a1, operation command circuit DSC1
When the transmission of the operation command is stopped and the auxiliary relay 5 is restored, the auxiliary relay 17 is restored by opening its first normally open contact 5a1, and its normally open contact 17a
The return of the auxiliary relay 5 is confirmed by opening the circuit. Subsequently, the operation command circuit DSC1 gives the operation command to the auxiliary relay 5 again, and the transmission of the operation command from the operation command circuit DSC2 is stopped to restore the auxiliary relay 6. In this case as well, when the auxiliary relay 17 returns, its normally open contact 17a opens, so this is confirmed by the inspection result confirmation circuit 15 and the inspection is completed. From the above confirmation of the return to operation, the permanently open points 5a1 and 6a1 of the auxiliary relays 5 and 6
It can be confirmed that there is no poor contact or welding. In addition, if a system fault occurs during this inspection, the inspection input is not applied to the first and second relays 1 and 2, so if there is an accident during the inspection and the fault point is outside the protected area, the 1 relay 1 or second relay 2
If either one of the relays operates and is within the protection interval, both relays send out operation determination outputs. Therefore, an AND condition between these outputs and the condition signal indicating that the first relay 1 is not being inspected and the second relay 2 is not being inspected is satisfied in the AND circuit 31 or the AND circuit 32 or both. As a result,
By sending the output through the OR circuit 33 as a signal to stop the inspection, the inspection can be stopped immediately and preparations can be made for the tripping of the breaker.

〔発明の効果〕〔Effect of the invention〕

以上説明した様に、本発明によれば第１の継電
器、第２の継電器の動作出力により動作する補助
継電器の接点をしや断器の引き外し条件としてこ
れらの接点を点検する場合においても系統の事故
を検出する継電器の動作判定部以降の出力用補助
継電器を動作させて自動点検を実施できるように
したので点検中の系統事故を継電器の動作判定部
の出力により検出して直ちに点検を中止すること
ができる信頼性の高い保護継電装置が提供でき
る。 As explained above, according to the present invention, even when the contacts of the auxiliary relay operated by the operating output of the first relay and the second relay are inspected as a condition for tripping the disconnector, the system Automatic inspection can be performed by activating the output auxiliary relay after the relay operation judgment section that detects faults in the relay, so a system fault during inspection can be detected by the output of the relay operation judgment section and the inspection can be stopped immediately. It is possible to provide a highly reliable protective relay device that can perform

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

第１図ａ〜ｃは従来の保護継電装置の構成を示
すもので、ａは点検回路を含む主回路のブロツク
図、ｂはしや断器引き外し回路の結線図、ｃは点
検結果確認回路図、第２図ａ〜ｃおよび第３図ａ
〜ｃは本発明による保護継電装置のそれぞれ異な
る実施例の構成を示すもので、ａは点検回路を含
む主回路のブロツク図、ｂはしや断器引き外し回
路の結線図、ｃは点検結果確認回路図である。 １，２……第１、第２の継電器、５，６……補
助継電器、７……点検電源、８ａ１，９ａ１，９
ａ２……点検時に動作させる補助継電器の常開接
点、１０……引き外しコイル、１０ａ……補助常
開接点、１２……しや断器、１５……点検結果確
認回路、１７……点検結果確認用補助継電器、１
８……限流抵抗、３１，３２……アンド回路、３
３，３４，３５……オア回路、DSC，DSC１，
DSC２……動作指令回路。 Figures 1a to 1c show the configuration of a conventional protective relay device, where a is a block diagram of the main circuit including the inspection circuit, b is a wiring diagram of the bridge and disconnection tripping circuit, and c is a confirmation of inspection results. Circuit diagrams, Figures 2a-c and 3a
-c show the configurations of different embodiments of the protective relay device according to the present invention, a is a block diagram of the main circuit including the inspection circuit, b is a connection diagram of the bridge and disconnection trip circuit, and c is the inspection diagram. It is a result confirmation circuit diagram. 1, 2...First and second relays, 5, 6...Auxiliary relay, 7...Inspection power supply, 8a1, 9a1, 9
a2... Normally open contact of the auxiliary relay operated during inspection, 10... Trip coil, 10a... Auxiliary normally open contact, 12... Inspection result confirmation circuit, 17... Inspection result Auxiliary relay for confirmation, 1
8... Current limiting resistor, 31, 32... AND circuit, 3
3, 34, 35...OR circuit, DSC, DSC1,
DSC2...Operation command circuit.

Claims (1)

【特許請求の範囲】 １ 電力系統の事故を検出すると動作する第１の
継電器および第２の継電器と、これら第１の継電
器および第２の継電器に対応してそれぞれ設けら
れ且つその対応する継電器の動作出力を受けると
動作する第１および第２の補助継電器とを設けて
これら第１および第２の補助継電器の動作時その
出力接点によりしや断器の引き外し条件回路を形
成してしや断器に引き外し指令を与えるようにし
た保護継電装置において、前記第１の継電器およ
び第２の継電器に点検入力を各別に与える点検電
源回路と、前記第１の補助継電器に動作指令を与
える動作指令回路と、前記第１の継電器又は第２
の継電器の一方が点検されているとき他方が非点
検中であることを条件にその非点検中の継電器が
動作すると点検中止指令を出力する点検中止回路
と、前記しや断器の引き外し条件回路に設けられ
前記動作指令回路からの動作指令により前記第１
の補助継電器が動作し且つ前記第２の継電器に前
記点検電源回路から点検入力が与えられると前記
第１および第２の補助継電器の出力接点を通して
流れる電流をしや断器引き外しに必要な電流以下
に制限する電流制限回路と、この電流制限回路に
設けられ且つこの回路を通して流れる電流に応動
するしや断器引き外し条件回路確認用の補助継電
器と、この補助継電器の出力接点および前記第１
の補助継電器の出力接点の開、閉状態により前記
第１および第２の継電器並びにしや断器引き外し
条件回路の点検結果を確認する回路とを備えたこ
とを特徴とする保護継電装置。 ２ 電力系統の事故を検出すると動作する第１の
継電器および第２の継電器と、これら第１の継電
器および第２の継電器に対応してそれぞれ設けら
れ且つその対応する継電器の動作出力を受けると
動作する第１および第２の補助継電器とを設けて
これら第１および第２の補助継電器の動作時その
出力接点によりしや断器の引き外し条件回路を形
成してしや断器に引き外し指令を与えるようにし
た保護継電装置において、前記第１の継電器およ
び第２の継電器に点検入力を各別に与える点検電
源回路と、前記第１の補助継電器および第２の補
助継電器に動作指令を格別に与える動作指令回路
と、前記第１の継電器又は第２の継電器の一方が
点検されているとき他方が非点検中であることを
条件にその非点検中の継電器が動作すると点検中
止指令を出力する点検中止回路と、前記しや断器
の引き外し条件回路に設けられ前記動作指令回路
からの動作指令により前記第１および第２の補助
継電器が動作し且つしや断器引き外し条件回路の
点検指令が与えられると前記第１および第２の補
助継電器の出力接点を通して流して流れる電流を
しや断器引き外しに必要な電流以下に制限する電
流制限回路と、この電流制限回路に設けられ且つ
この回路を通して流れる電流に応動するしや断器
引き外し条件回路確認用の補助継電器と、この補
助継電器の出力接点並びに前記第１および第２の
補助継電器の出力接点の開、閉状態により前記第
１および第２の継電器、しや断器引き外し条件回
路の点検結果を確認する回路とを備えたことを特
徴とする保護継電装置。[Scope of Claims] 1. A first relay and a second relay that operate when an accident in the power system is detected, and a relay that is provided correspondingly to the first relay and the second relay and that corresponds to the first relay and the second relay. First and second auxiliary relays are provided which operate when receiving an operation output, and when the first and second auxiliary relays are operated, their output contacts form a circuit for tripping the circuit breaker. In a protective relay device configured to give a tripping command to a disconnector, an inspection power supply circuit that separately gives a check input to the first relay and the second relay, and gives an operation command to the first auxiliary relay. an operation command circuit; and the first relay or the second relay.
an inspection cancellation circuit that outputs an inspection cancellation command when one of the relays is operated and the other relay is not inspected; and a condition for tripping the breaker. The first control circuit is provided in a circuit, and the first
When the auxiliary relay operates and the second relay is given a check input from the check power supply circuit, the current flowing through the output contacts of the first and second auxiliary relays is changed to the current required to trip the breaker. a current limiting circuit that limits the following; an auxiliary relay provided in this current limiting circuit that responds to the current flowing through this circuit; and an auxiliary relay for confirming the circuit breaker tripping condition;
A protective relay device comprising: a circuit for checking the inspection results of the first and second relays and the circuit breaker tripping condition circuit according to the open/closed state of the output contact of the auxiliary relay. 2. A first relay and a second relay that operate when an accident in the power system is detected, and a first relay and a second relay that are provided corresponding to the first relay and the second relay and that operate when receiving the operating output of the corresponding relay. A first and second auxiliary relay are provided, and when the first and second auxiliary relays are operated, a circuit for tripping the insulated breaker is formed by the output contacts of the first and second auxiliary relays, and a trip command is issued to the insulated breaker. In the protective relay device, the protective relay device includes an inspection power supply circuit that separately provides inspection inputs to the first relay and the second relay, and a separate operation command to the first auxiliary relay and the second auxiliary relay. an operation command circuit that is given to the circuit, and outputs an inspection stop command when one of the first relay or the second relay is being inspected and the other is not being inspected and the relay that is not being inspected operates. and a circuit breaker tripping condition circuit for operating the first and second auxiliary relays in response to an operation command from the operation command circuit. A current limiting circuit that flows through the output contacts of the first and second auxiliary relays when an inspection command is given to limit the flowing current to a current required for tripping the circuit breaker or less, and a current limiting circuit provided in the current limiting circuit. In addition, an auxiliary relay for checking the circuit breaker tripping condition responds to the current flowing through this circuit, and the output contact of this auxiliary relay and the open/closed state of the output contacts of the first and second auxiliary relays A protective relay device comprising first and second relays and a circuit for checking the inspection result of a circuit breaker tripping condition circuit.