JPS63213414A - Bus bar protector - Google Patents
Bus bar protectorInfo
- Publication number
- JPS63213414A JPS63213414A JP4266887A JP4266887A JPS63213414A JP S63213414 A JPS63213414 A JP S63213414A JP 4266887 A JP4266887 A JP 4266887A JP 4266887 A JP4266887 A JP 4266887A JP S63213414 A JPS63213414 A JP S63213414A
- Authority
- JP
- Japan
- Prior art keywords
- bus
- circuit
- busbar
- inspection
- judgment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001012 protector Effects 0.000 title 1
- 238000007689 inspection Methods 0.000 claims description 57
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000007257 malfunction Effects 0.000 description 4
- 230000000452 restraining effect Effects 0.000 description 4
- 230000004913 activation Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000006732 Torreya nucifera Nutrition 0.000 description 1
- 244000111306 Torreya nucifera Species 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Landscapes
- Connection Or Junction Boxes (AREA)
- Details Of Indoor Wiring (AREA)
- Non-Insulated Conductors (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、自動点検回路を含む電流差動母線保護装置の
自動監視の検出機能の向上に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in the detection function of automatic monitoring of a current differential bus protection device including an automatic inspection circuit.
従来の複母線の保護対象とする自動点検回路を含む母線
切換え中、すなわち、小母線同士が回線の断路器によっ
て連絡されている場合、入力回路の情報を一つの判定回
路に導入する必要があるため入力回路の出力を一つの判
定回路の入力に接続するように構成する必要がある。こ
のため、すべての入力回路から、切り離された判定回路
に点検電流の情報を導入する事はできない。During bus bar switching that includes an automatic inspection circuit that is protected by conventional multi-bus bars, that is, when small buses are connected to each other by a circuit disconnector, it is necessary to introduce input circuit information into one judgment circuit. Therefore, it is necessary to configure the output of the input circuit to be connected to the input of one determination circuit. Therefore, it is not possible to introduce information on the inspection current from all input circuits to the disconnected judgment circuit.
以上より、母線切換え中は、点検起動できない様にシー
ケンス回路を構成する必要があった。In view of the above, it was necessary to configure the sequence circuit so that inspection cannot be activated during bus bar switching.
上記、従来の複母線の保護対象とする自動点検回路を含
む母線保護装置の自動点検起動の条件に母線切換え中で
ないと言う条件が必要であった。As mentioned above, the condition for starting automatic inspection of the conventional bus bar protection device including the automatic inspection circuit that protects the multi-bus bar is that the bus bar is not being switched.
すなわち、母線切換え時に、判定回路の誤不動作を監視
する自動点検を行えず、母線保護装置の自動監視の不良
検出能力を低下させていた。That is, when the bus bar is switched, automatic inspection for monitoring malfunction of the determination circuit cannot be performed, which reduces the ability of automatic monitoring of the bus protection device to detect defects.
又、母a間の区分間rjII器に断路器を設けた各種複
母線を保護対象とする自動点検回路を含む母線保護装置
に於いて、母線切換え時の条件は複雑であり、母線構成
に合せて自動点検回路の内外部のシーケンス回路で、そ
の都度1条件を構成し対応する必要があり、自動点検回
路を含む母線保護装置の標準化を行う上での障害となる
問題があった。In addition, in a busbar protection device that includes an automatic inspection circuit that protects various multibusbars with a disconnect switch installed in the RJII switch between the sections between buses A, the conditions for busbar switching are complex, and the conditions must be adjusted according to the busbar configuration. Therefore, it is necessary to configure and respond to one condition each time in the internal and external sequence circuits of the automatic inspection circuit, which poses a problem that becomes an obstacle to the standardization of busbar protection devices including automatic inspection circuits.
本発明は、これらの問題点を解消することを目的とする
ものである。The present invention aims to solve these problems.
又、公知例でも述べられているが、判定回路等の常時不
動作部の誤動作を監視する常時監視に於いて、不良検出
を行った場合、自動点検を行えなくする必要がある。常
時監視不良は装置異常であり、自動点検起動した場合、
最終段の誤出力に到る可能性があるためである。Furthermore, as described in the prior art, when a defect is detected during constant monitoring to monitor malfunctions of non-operating parts such as determination circuits, it is necessary to disable automatic inspection. Constant monitoring failure is a device abnormality, and if automatic inspection is started,
This is because there is a possibility of erroneous output at the final stage.
電流差動方式を適用する多重母線を保護対象とする自動
点検回路を含む母線保護装置に於いて、入力回路と判定
回路の間に、アナログスイッチと加算器を新たに設ける
ことにより、多重母線の母線切換時に於いて、入力回路
をどちらか一つにまとめる必要はなくなる。In a bus protection device that includes an automatic inspection circuit that protects multiple buses applying the current differential method, an analog switch and an adder are newly installed between the input circuit and the judgment circuit. When switching bus lines, there is no need to combine the input circuits into either one.
このため、母線連絡(以下母連)の入力回路は、判定回
路から切り離されることはなく、多重母線の母線切換時
にも、母連に接続される入力回路に点線電流を重畳する
ことにより、自動点検起動が可能となる。Therefore, the input circuit of the bus connection (hereinafter referred to as bus connection) is not disconnected from the judgment circuit, and even when switching the bus of multiple buses, the input circuit connected to the bus connection is automatically superimposed with a dotted current. Inspection startup is now possible.
以上より、母線の接続条件に関係なく、自動点検を起動
することが可能であるため、自動点検回路を含む母線保
護装置の自動監視の不良検出能力を向上することができ
、自動点検回路の内外部のシーケンス回路の煩雑さを解
消でき、自動点検回路を含む母線保護装置の標準化が可
能である。From the above, it is possible to start automatic inspection regardless of the bus connection conditions, so it is possible to improve the failure detection ability of automatic monitoring of bus protection devices including automatic inspection circuits, and The complexity of external sequence circuits can be eliminated, and bus protection devices including automatic inspection circuits can be standardized.
複母線の母線切換え時にも、各入力回路の情報は、母線
の接続条件によって制御されるアナログスイッチと加算
器を通して、各小母線用の判定回路に導入される。すな
わち、各小母線に接続されている入力回路の情報は、ア
ナログスイッチを通して、加算器に導入される。加算器
で本来の保護対象とする小母線に接続された入力回路の
情報と加算され、各小母線用の判定回路に導入される。Even when switching the buses of a multi-bus, the information of each input circuit is introduced into the determination circuit for each small bus through an analog switch and an adder controlled by the bus connection conditions. That is, the information of the input circuit connected to each small bus bar is introduced into the adder through the analog switch. The adder adds this information to the information of the input circuit connected to the small bus that is originally the target of protection, and then inputs the information to the determination circuit for each small bus.
これにより、母線切換え中、すなわち、回線の断路器に
より、二つの小母線が連結された場合、各小母線用の判
定回路は、それぞれ二つの小母線を一つの母線として、
母線内部事故判定を行う。As a result, during bus switching, that is, when two small buses are connected by a line disconnector, the determination circuit for each small bus will treat the two small buses as one bus,
Performs busbar internal accident determination.
母線の接続条件によって母連に接続される入力回路をど
ちらか一方に切換える必要がなく、常に、母連に接続さ
れる入力回路は点検対象の判定回路に接続されているた
め、母線切換え時にも自動点検が可能となる。There is no need to switch the input circuit connected to the bus to either one depending on the bus connection conditions, and the input circuit connected to the bus is always connected to the judgment circuit to be inspected, so even when switching the bus, Automatic inspection becomes possible.
第2図は、従来の電流差動方式を用いた電気所の母線保
護方式を示す。FIG. 2 shows a bus bar protection system for electrical stations using a conventional current differential system.
二つの小母線IA、IBには、電流差動方式の母線保護
リレーの判定回路6A、6Bが設けられている。断路器
11Aが閉路し、断路器11Bが開路し、回線11Cが
小母線IAにのみ、接続されている場合、回線11Cに
流出入する電流に比例した量を変流器12Gより、入力
回路13Gに導入する。入力回路13Gでは、導入した
量のベクトル量、スカラ量を得て、断路器11Bの開閉
条件により制御される回線切換え回路14Gを通して、
判定回路6Aに導入する。又、母連から流出入する電流
の情報を入力回路23Aで、ベクトル量、スカラ量を作
り、判定回路6Aに導入する。The two small buses IA and IB are provided with judgment circuits 6A and 6B of a current differential type bus protection relay. When the disconnector 11A is closed, the disconnector 11B is open, and the line 11C is connected only to the small bus IA, an amount proportional to the current flowing in and out of the line 11C is transferred from the current transformer 12G to the input circuit 13G. to be introduced. The input circuit 13G obtains the introduced vector quantities and scalar quantities, and passes them through the line switching circuit 14G controlled by the opening/closing conditions of the disconnector 11B.
It is introduced into the determination circuit 6A. Further, the input circuit 23A generates a vector quantity and a scalar quantity from information on the current flowing in and out from the mother chain, and introduces the generated vector quantity and scalar quantity into the determination circuit 6A.
判定回路6Aでは、小母線IAに流出入する電流に比例
したベクトル量の総和を動作力、スカラ量の総和を抑制
力として、小母線IAの母線内部事故判定を行う。The determination circuit 6A uses the sum of vector quantities proportional to the current flowing in and out of the sub-bus IA as an operating force, and the sum of scalar quantities as a restraining force to determine an internal fault in the sub-bus IA.
すなわち、判定回路6Aに導入されるベクトル量の総和
を動作力(0)、スカラ量の総和を抑制力(R)として
、(○)と(R)の大小により、母線内部事故か、外部
事故かを判定する。That is, assuming that the sum of the vector quantities introduced into the judgment circuit 6A is the operating force (0) and the sum of the scalar quantities is the restraining force (R), depending on the magnitude of (○) and (R), it is determined whether the fault is internal to the bus bar or external. Determine whether
母線内部事故では、全ての回線、及び、母連から母線に
電流が流入する事より、原理上、(0)= (R)とな
り、(0)と(R)に抑制係数k(通常、k=0.3〜
0.5)を乗算した値の大小関係は、(○)>k・(R
)となり、母線内部事故を検出する。又、一方、母線外
部事故及び、通常時には、母線に流入する電流と流出す
る電流が等しいので、動作力となるベクトル量の総和は
、原理上(0)=0となり、(○)<k・(R)となる
事より、母線外部事故と判定する。In a bus internal fault, current flows into the bus from all circuits and bus links, so in principle, (0) = (R), and (0) and (R) have a suppression coefficient k (usually k =0.3~
The magnitude relationship of the values multiplied by 0.5) is (○)>k・(R
), and an internal busbar accident is detected. On the other hand, in the case of an external fault on the busbar or in normal conditions, the current flowing into the busbar is equal to the current flowing out of the busbar, so the sum of the vector quantities that become the operating force is, in principle, (0)=0, and (○)<k・(R), it is determined that this is an accident outside the bus bar.
母線内部事故が検出された場合は、母線IAに接続され
ている回線、及び、母連のしゃ断器15C,25Cを引
き外すように引き外し回路を構成する。When an internal fault on the bus is detected, a tripping circuit is configured to trip the line connected to the bus IA and the circuit breakers 15C and 25C of the bus.
又、同様にして、小母線IBに流出入する電流に比例し
たベクトル量の総和を動作力、スカラ量の総和を抑制力
として、小母線IBの判定回路6Bに導入する。これと
同様の判定条件により。Similarly, the sum of vector quantities proportional to the current flowing in and out of the small bus IB is used as an operating force, and the sum of scalar quantities is used as a restraining force, which are introduced into the judgment circuit 6B of the small bus IB. Based on similar judgment conditions.
小母線IBに接続される回線及び母連のしゃ断器を引き
外す様に回路を構成する。A circuit is configured to trip the line and bus circuit breaker connected to the small bus IB.
この保護方式の判定回路の誤不動作を監視する自動点検
方式を第3図に示す。自動点検回路では点検指令によっ
て、抑制力を判定回路から切り離し、動作力のみを判定
回路に導入する様に回路を構成し、さらに、点検電流を
断路器の開閉条件を必要としない母連に接続される入力
回路に重畳する様に回路を構成する。これにより、母線
内部事故以外は、小母線に流出入する差電流が0そある
事から1点検電流のベクトル量のみが、動作力として判
定回路に伝達されるため、(○)>k・(R)となり、
判定回路は動作する。以上の原理から。FIG. 3 shows an automatic inspection system for monitoring malfunctions of the judgment circuit of this protection system. In the automatic inspection circuit, the control force is separated from the judgment circuit by the inspection command, and the circuit is configured so that only the operating force is introduced into the judgment circuit, and the inspection current is connected to the bus link that does not require the opening/closing conditions of the disconnector. The circuit is configured so as to be superimposed on the input circuit to be used. As a result, since there is zero difference current flowing in and out of the small bus except for internal bus faults, only the vector amount of the 1-inspection current is transmitted to the judgment circuit as operating force, so (○)>k・( R),
The determination circuit operates. From the above principle.
点検指令により、点検電流を母連に接続される入力回路
に重畳し、その時の判定回路の出力の監視を行う事によ
り、判定回路が正常に動作するかどうかの判定回路の誤
不動作の監視を行うことができる。Based on the inspection command, the inspection current is superimposed on the input circuit connected to the bus link, and the output of the judgment circuit at that time is monitored to check whether the judgment circuit is operating normally or not. It can be performed.
すなわち、判定回路6Aの自動点検を行う場合、点検指
令8Aの動作により1点検電流は、母連に接続される入
力回路23Aに重畳される。入力回路23Aに於いて、
得られたベクトル量は、そのまま判定回路6Aに導入さ
れるが、スカラ量は、点検指令8Aにより、切り離され
るため、判定回路6Aには、導入されない。通常、母線
に流入。That is, when automatically inspecting the determination circuit 6A, the 1-inspection current is superimposed on the input circuit 23A connected to the bus link by the operation of the inspection command 8A. In the input circuit 23A,
The obtained vector quantity is directly introduced into the determination circuit 6A, but the scalar quantity is separated by the inspection command 8A and is therefore not introduced into the determination circuit 6A. Normally flows into the busbar.
流出する差電流は、0である事より、判定回路6Aに導
入される動作力は、点検電流のベクトル量のみであり、
抑制力は、点検指令8Aにより、切り離されるため、O
であることから、判定回路の動作判定式は、(○)<k
・(R)となることより、判定回路6Aは動作する。判
定回路6Aの出カフAの動作を監視することによって1
判定回路6Aの誤不動作の監視が可能である。Since the differential current that flows out is 0, the operating force introduced into the judgment circuit 6A is only the vector amount of the inspection current.
Since the suppressing force is disconnected by inspection command 8A, O
Therefore, the operation determination formula of the determination circuit is (○)<k
- (R), the determination circuit 6A operates. 1 by monitoring the operation of the output cuff A of the determination circuit 6A.
It is possible to monitor malfunctions of the determination circuit 6A.
第3図中には、示さないが、上記と同様にして第2図中
の判定回路6Bの自動点検を行うことができる。Although not shown in FIG. 3, the determination circuit 6B in FIG. 2 can be automatically inspected in the same manner as described above.
第2図の保護方式と第3図の自動点検方式は。The protection system shown in Figure 2 and the automatic inspection system shown in Figure 3.
母線切り換え時、すなわち、第2図に示す回線ICの断
路器11A、IIBが同時に閉路し、小母線IA、IB
が連結され、見かけ上、一つの母線となる母線の接続条
件を考慮していない。At the time of bus switching, that is, the disconnectors 11A and IIB of the line IC shown in FIG. 2 close simultaneously, and the small buses IA and IB
It does not take into account the connection conditions of the busbars, which are connected and appear to be one busbar.
上記の母線の接続条件を考慮した従来の母線保護方式を
第4図に示す。FIG. 4 shows a conventional bus bar protection system that takes into consideration the above bus bar connection conditions.
第4図に示す様に、母連に接続されている入力回路のど
ちらか一方に回線切り換え回路を追加し、断路器11A
、IIBによって、小母線IA。As shown in Fig. 4, a line switching circuit is added to either one of the input circuits connected to the bus, and a disconnector 11A
, IIB by subbus IA.
IBが連結されている場合、すべての入力回路の情報を
一つの判定回路に導入し、二つの異なる小母線を一括し
て保護する様に構成する必要がある。When the IBs are connected, it is necessary to introduce information from all input circuits into one judgment circuit and to protect two different small buses at once.
すなわち、この場合、母連に接続される入力回路23A
と判定回路6A、6Bの間に、回線切換え回路24Aを
新たに設け、断路器11A、IIBが、共に閉路してい
る条件で補助リレー16Gを動作させ、入力回路23A
で得られた情報を判定回路6Bに導入する様に切り換え
る様に構成する。That is, in this case, the input circuit 23A connected to the motherboard
A line switching circuit 24A is newly installed between the input circuit 23A and the judgment circuit 6A, and the auxiliary relay 16G is operated under the condition that the disconnectors 11A and IIB are both closed.
The configuration is such that the information obtained in the above is switched to be introduced into the determination circuit 6B.
これにより、回線の入力回路13G、及び、母連に接続
されている入力回路23Aで得た情報を回線切換え回路
14C,24Aを通して1判定回路6Bに導入し、入力
回路23Bで得た情報を含めて、母線内外事故判定を判
定回路6Bで行い、小母線IA、IBの両方の小母線を
一括して保護を行う様に、引き外し回路を構成する。As a result, the information obtained from the input circuit 13G of the line and the input circuit 23A connected to the motherboard is introduced into the 1 judgment circuit 6B through the line switching circuits 14C and 24A, including the information obtained from the input circuit 23B. The tripping circuit is configured so that the judgment circuit 6B performs a judgment on whether an accident occurs inside or outside the bus, and protects both the small buses IA and IB at once.
小母線LA、IBが、断路器11A、IIBにより連結
されている場合、前記、第3図に示した従来の自動点検
方式では、すべての入力回路が一つの判定回路に接続さ
れているため、切り離された判定回路の自動点検を行う
事は出来ない。When the small buses LA and IB are connected by disconnectors 11A and IIB, in the conventional automatic inspection method shown in FIG. 3, all input circuits are connected to one judgment circuit. Automatic inspection of the disconnected judgment circuit is not possible.
すなわち、小母線IA、IBが、断路器11A。That is, the small buses IA and IB are the disconnector 11A.
11Bにより、連結されている場合、入力回路13C:
、23A、23Bは、すへて判定回路6Bに接続される
ため、第3図中に示す点検指令8Aを動作させ、入力回
路23Aに点検電流を入力しても1判定回路6Aには、
点検電流の情報は導入されないため、判定回路6Aの自
動点検は行えない。When connected by 11B, input circuit 13C:
, 23A, and 23B are all connected to the judgment circuit 6B, so even if the inspection command 8A shown in FIG.
Since information on the inspection current is not introduced, automatic inspection of the determination circuit 6A cannot be performed.
以上より、母線切換え中の条件、すなわち、小母fil
A、IBが、断路器11A、IIBによって、連結され
ている条件では、自動点検を行えなくする様に自動点検
の起動条件に、母線切換え中でない条件を加える必要が
ある。従って、従来方式では、母線切換え中の母線運用
を考慮した場合、自動監視の不良検出能力が低下すると
言う欠点がある。From the above, the conditions during bus bar switching, that is, the small bus fil
Under the condition that A and IB are connected by disconnectors 11A and IIB, it is necessary to add a condition that bus bar switching is not in progress to the automatic inspection activation condition so that automatic inspection cannot be performed. Therefore, the conventional system has a drawback in that the failure detection ability of automatic monitoring is reduced when bus operation during bus bar switching is taken into account.
又、海外の電気所の母線には、小母線間の区分開閉器(
セクション)として、断路器を設ける事が多い。その為
、母線切換え中の条件を構成するには、煩雑なシーケン
ス回路を構成しなければならないと言う欠点がある。In addition, on the busbars of overseas electrical stations, sectional switches (
Section) is often equipped with a disconnect switch. Therefore, there is a drawback that a complicated sequence circuit must be constructed in order to configure the conditions during bus bar switching.
本発明は、これらの欠点を解消することを目的とするも
のである。以下本発明の代表例を第1図を用いて説明す
る。The present invention aims to eliminate these drawbacks. A typical example of the present invention will be described below with reference to FIG.
第1図に示す回路は、入力回路と判定回路6A。The circuit shown in FIG. 1 is an input circuit and a determination circuit 6A.
6Bの間にそれぞれ加算器10A、IOB、図中の位置
にアナログスイッチ10Cを設けたことを特徴とする。6B, an adder 10A and an IOB, and an analog switch 10C are provided at the positions shown in the figure.
本回路の動作を以下に説明する。The operation of this circuit will be explained below.
回線11Cで、断路器11Aが閉じ、11BがfJき、
母線IAにのみ、接続されている場合、アナログスイッ
チ10C内の切換え接点は開放され、判定回路6A、6
Bは独立になっている。この状態では母線IA、あるい
は、IBの事故で該当する判定回路6A、6Bは単独で
、母線内部事故が、母線外部事故かの動作判定を行う。In line 11C, disconnector 11A closes, 11B opens fJ,
When connected only to the bus IA, the switching contact in the analog switch 10C is opened and the judgment circuits 6A, 6
B is independent. In this state, the judgment circuits 6A and 6B corresponding to an accident on the bus IA or IB independently determine whether an internal fault on the bus is an external fault on the bus.
回線11Cで、断路器11Bが閉じ、11Aが開き、小
母線IBにのみ、接続されている場合、アナログスイッ
チ10C内の切換え接点は開放され、判定回路6A、6
Bは独立になっている。この状態では同様に、小母線L
A、IBの判定回路6A、6Bは、母線内、外事数の動
作判定を行う。In the line 11C, when the disconnector 11B is closed and the disconnector 11A is opened, and it is connected only to the small bus IB, the switching contact in the analog switch 10C is opened, and the judgment circuits 6A, 6
B is independent. In this state, the small bus line L
The determination circuits 6A and 6B of A and IB determine the operation within the bus line and the number of external events.
この場合、自動点検方式は従来方式と同様に、点検指令
8Aにより点検電流を母連に接続される入力回路23A
に重畳し1判定回路6Aの出カフAの動作により判定を
行う。又、同様に、点検指令8Bにより点検電流を母連
に接続される入力回路23Bに入力し、判定回路6Bの
出カフBの動作により判定を行う。In this case, the automatic inspection method is similar to the conventional method, in which the inspection current is supplied to the input circuit 23A connected to the motherboard by the inspection command 8A.
The determination is made by the operation of the output cuff A of the 1 determination circuit 6A. Similarly, an inspection current is inputted to the input circuit 23B connected to the bus link according to the inspection command 8B, and a judgment is made by the operation of the output cuff B of the judgment circuit 6B.
回線の切換え中、すなわち、回線11Cの断路器11A
とIIBが同時に閉じている場合、補助リレー16Cが
動作し、アナログスイッチ10c内の切換え接点が閉じ
て、小母線IAの判定回路6Aには、小母線IBの情報
が、IOCを通して導入され、加算器10Aで小母線I
Aの情報と加算さたベクトル量(0)が動作力、又、加
算されたスカラ量(R)が、抑制力として導入される。During line switching, that is, disconnector 11A of line 11C
When IIB and IIB are closed at the same time, the auxiliary relay 16C operates, the switching contact in the analog switch 10c closes, and the information on the small bus IB is introduced through the IOC into the judgment circuit 6A of the small bus IA, and the information is added. Small bus bar I with 10A
The vector quantity (0) added to the information of A is introduced as the operating force, and the added scalar quantity (R) is introduced as the restraining force.
同様に、6Bにも同一のベクトル量(0)、スカラ量(
R)が導入される。Similarly, 6B also has the same vector quantity (0) and scalar quantity (
R) is introduced.
従って、母線IA、IBが、回線の断路器によって、連
結されている場合にも、判定回路6A。Therefore, even when the buses IA and IB are connected by a line disconnector, the determination circuit 6A.
6Bの出力により、母線IA、IBを同時に保護するこ
とができ、システム保護上、なんら問題はない。With the 6B output, buses IA and IB can be protected simultaneously, and there is no problem in terms of system protection.
又、さらには、母線の接続条件11AとIIBが共に閉
じている場合でも、同様に自動点検ができる。Furthermore, automatic inspection can be performed in the same way even when the busbar connection conditions 11A and IIB are both closed.
すなわち、判定回路6Aの自動点検を行う場合。That is, when performing automatic inspection of the determination circuit 6A.
点検指令8Aを動作させ、母連に接続されている入力回
路23Aに点検電流を重畳する。点検電流のベクトル量
の情報は、加算器10Aを通して判定回路6Aに導入さ
れるが、点検電流のスカラ量の情報は1点検指令8Aに
よって、切り離されているため導入されない。従って、
動作判定条件は。The inspection command 8A is operated to superimpose an inspection current on the input circuit 23A connected to the bus link. Information on the vector quantity of the inspection current is introduced into the determination circuit 6A through the adder 10A, but information on the scalar quantity of the inspection current is not introduced because it is separated by the 1-inspection command 8A. Therefore,
What are the conditions for determining operation?
゛(○)>k・(R)となり1判定回路6Aは動作する
。゛(○)>k·(R), and the 1 determination circuit 6A operates.
又1判定回路6Bの自動点検を行う場合も同様であり1
点検指令8Bを動作させ、母連に接続されている入力回
路23Bに点検電流を重畳する事により行う。The same applies when automatically inspecting the 1 judgment circuit 6B.
This is done by activating the inspection command 8B and superimposing an inspection current on the input circuit 23B connected to the bus link.
すなわち、従来方式では、母線の接続条件によって、す
べての入力回路をどちらか一つの判定回路にまとめる必
要があったのに対し、本発明の方式では、母線の接続条
件によって、母連に接続されている入力回路を切り換え
る必要がなく、母線の接続条件に関係なく、特定の入力
回路に点検電流を重畳する事により1判定回路に点検電
流の情報を導入する様に構成しているためである。In other words, in the conventional method, it was necessary to combine all input circuits into one judgment circuit depending on the bus connection conditions, whereas in the method of the present invention, all input circuits were connected to a bus chain depending on the bus connection conditions. This is because there is no need to switch between input circuits, and information on the check current is introduced into the 1 judgment circuit by superimposing the check current on a specific input circuit, regardless of the bus connection conditions. .
本発明によれば、母線切換え中に点検起動を行えなくし
、不良検出能力を低下させると言う欠点を克服でき、母
線保護装置の自動監視の不良検出能力を高めることがで
きる。According to the present invention, it is possible to overcome the disadvantage of not being able to perform inspection activation during busbar switching and reducing the defect detection capability, and to improve the defect detection capability of automatic monitoring of the busbar protection device.
又、自動点検回路に母線の接続条件が必要でないため、
自動点検回路を含めた母線保護装置の標準化ができ、実
用上のメリットが大きい。In addition, since the automatic inspection circuit does not require bus bar connection conditions,
It is possible to standardize bus protection devices including automatic inspection circuits, which has great practical benefits.
第1図は本発明の原理を示す回路図、第2図は従来の母
線保護方式を示す回路図、第3図は従来の自動点検方式
を示す回路図、第4図は母線の接続条件を考慮した従来
の母線保護方式の回路図である。
LA、IB・・・小母線、IIA、IIB・・・断路器
。
11C・・・回線、12C,22A、22B・・・変流
器。
13G、23A、23B・・・入力回路、15C925
C・・・しゃ断器、21C・・・母連。
$21Zl
茅3図Fig. 1 is a circuit diagram showing the principle of the present invention, Fig. 2 is a circuit diagram showing a conventional bus bar protection system, Fig. 3 is a circuit diagram showing a conventional automatic inspection system, and Fig. 4 shows the bus bar connection conditions. FIG. 2 is a circuit diagram of a conventional bus protection method taken into consideration. LA, IB...Small busbar, IIA, IIB...Disconnector. 11C...Line, 12C, 22A, 22B...Current transformer. 13G, 23A, 23B...Input circuit, 15C925
C...breaker, 21C...mother chain. $21Zl Kaya 3
Claims (1)
む母線保護装置に於いて、 母線に接続されている送電線、変圧器及び、母線連絡等
のCT二次電流を導入する入力回路と、前記複母線を区
分開閉器により分ける小母線ごとに配置され、前記各小
母線の内部事故を検出する判定回路の間に、アナログス
イッチと加算器を設け、前記母線の接続条件に関係なく
前記各判定回路にのみ接続されている前記母線連絡に接
続されている前記入力回路に点検電流を重畳することを
特徴とする母線保護装置。[Scope of Claims] 1. In a busbar protection device including an automatic inspection circuit that protects multiple busbars at an electric station, the power transmission lines connected to the busbar, transformers, and CT secondary such as busbar connections, etc. An analog switch and an adder are provided between an input circuit that introduces current and a judgment circuit that is arranged for each sub-bus that separates the multi-bus bar by a sectional switch and that detects an internal fault in each sub-bus. A busbar protection device characterized in that a check current is superimposed on the input circuit connected to the busbar connection that is connected only to each of the determination circuits, regardless of connection conditions of the busbar protection device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4266887A JPS63213414A (en) | 1987-02-27 | 1987-02-27 | Bus bar protector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4266887A JPS63213414A (en) | 1987-02-27 | 1987-02-27 | Bus bar protector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63213414A true JPS63213414A (en) | 1988-09-06 |
Family
ID=12642401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4266887A Pending JPS63213414A (en) | 1987-02-27 | 1987-02-27 | Bus bar protector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63213414A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5344073A (en) * | 1992-04-29 | 1994-09-06 | Nordson Corporation | Nozzle cleaning system including spray gun cover for can coating system |
-
1987
- 1987-02-27 JP JP4266887A patent/JPS63213414A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5344073A (en) * | 1992-04-29 | 1994-09-06 | Nordson Corporation | Nozzle cleaning system including spray gun cover for can coating system |
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