JPS5947529B2 - Bus bar automatic switching system - Google Patents

Bus bar automatic switching system

Info

Publication number
JPS5947529B2
JPS5947529B2 JP12971877A JP12971877A JPS5947529B2 JP S5947529 B2 JPS5947529 B2 JP S5947529B2 JP 12971877 A JP12971877 A JP 12971877A JP 12971877 A JP12971877 A JP 12971877A JP S5947529 B2 JPS5947529 B2 JP S5947529B2
Authority
JP
Japan
Prior art keywords
bus
synchronous
voltage
automatic switching
automatic
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
Application number
JP12971877A
Other languages
Japanese (ja)
Other versions
JPS5463344A (en
Inventor
勇司 鈴木
泉 山下
俊臣 下中
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 Corp
Original Assignee
Tokyo Shibaura Electric Co Ltd
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 Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Priority to JP12971877A priority Critical patent/JPS5947529B2/en
Publication of JPS5463344A publication Critical patent/JPS5463344A/en
Publication of JPS5947529B2 publication Critical patent/JPS5947529B2/en
Expired legal-status Critical Current

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Description

【発明の詳細な説明】 本発明は異なつた二つの電源に結ばれる変圧器電動機な
どを負荷にもつ母線における母線自動切替方式に関する
ものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic bus switching system for a bus whose load is a transformer motor or the like connected to two different power sources.

従来の母線切善方式を第1図、第2図により説明する。The conventional bus line cutting method will be explained with reference to FIGS. 1 and 2.

第1図は運用系統図であり、しや断器3、4は常時「閉
」、しや断器5は常時「開」とし、電源1と電源2の2
系統の電源より受電して負荷9、9’に電力を供給して
いるものとする。尚6、Tは夫々母線である。今、電源
1の電源喪失時に自動的にしや断器3を「開」、しや断
器5を「閉」として電源を確保するシステムにおいて、
負荷9に接続された電動機の残留電圧による母線6の電
圧と、健全な電源側の母線1の電圧の大きさと位相とを
、それぞれの母線に接続された計器用変圧器8、8’に
より検出し、同期継電器10に入力し、比較して自動切
替を行なうかどうかの判定を行なつている。この判定の
具体的な方法としては、第2図のように同期継電器10
の検出範囲11を設定し、この継電器10に入力された
健全な側の母線電圧12と電動機の残留電圧による電源
喪失側の母線6の電圧13とが、ある一定時間(同期時
間)だけこの同期検出範囲11にあれば、同期継電器1
0により自動切替の指令を出すようになつている。又、
逆に電源2の電源喪失時には、自動的にしや断器4を「
開」、しや断器5を「閉」として、同様に電源を確保す
る。しかし残留電圧の大きさと位相によつては、自動切
替を行なうと、切替えられた母線側の負荷に大きな電磁
力が加わり損傷にいたることがあるため、負荷側の投入
可能範囲14を求め、同期継電器10による指令が出さ
れてからしや断器5が投入するまでの時間をも考慮して
、同期検出範囲11を定めている。
Figure 1 is an operational system diagram, in which the breakers 3 and 4 are always closed, the breakout switch 5 is always open, and the power supplies 1 and 2 are
It is assumed that power is received from the grid power source and is supplied to the loads 9 and 9'. Note that 6.T is a bus line, respectively. Now, in a system that secures power by automatically opening the breaker 3 and closing the breaker 5 when the power source 1 loses power,
The magnitude and phase of the voltage on the bus 6 due to the residual voltage of the motor connected to the load 9 and the voltage on the bus 1 on the healthy power supply side are detected by the voltage transformers 8 and 8' connected to the respective buses. The signal is then input to the synchronous relay 10 and compared to determine whether automatic switching should be performed. As a specific method for this determination, as shown in FIG.
The detection range 11 is set so that the bus voltage 12 on the healthy side input to the relay 10 and the voltage 13 on the bus 6 on the power loss side due to the residual voltage of the motor are synchronized for a certain period of time (synchronization time). If it is within detection range 11, synchronous relay 1
0 issues an automatic switching command. or,
Conversely, when the power supply 2 loses power, it automatically switches off the breaker 4.
Similarly, the power supply is secured by setting the power supply to "open" and the breaker 5 to "closed". However, depending on the magnitude and phase of the residual voltage, if automatic switching is performed, a large electromagnetic force may be applied to the switched load on the bus side, resulting in damage. The synchronization detection range 11 is determined by taking into account the time from when a command is issued by the relay 10 to when the mustard cutter 5 is turned on.

このような従来方式に於ては、同期検出範囲11が限定
され、同期検出から母線切替にいたるまでの時間が短い
という欠点があり、従つて自動切替を可能とするチヤン
スが非常に少ないことになる。
This conventional method has the disadvantage that the synchronization detection range 11 is limited and the time from synchronization detection to bus switching is short, and therefore there is very little chance of automatic switching. Become.

従つて本発明は、複数の同期継電器を用い、同期検出範
囲も複数として検出範囲を広げ、自動切換可能なチヤン
スを多くした母線自動切換方式を得ることを目的とする
ものである。
Therefore, an object of the present invention is to obtain an automatic bus switching system that uses a plurality of synchronous relays and has a plurality of synchronous detection ranges to widen the detection range and increase the chances of automatic switching.

以下図面を参照して本発明を説明する。The present invention will be explained below with reference to the drawings.

第3図は2個の同期継電器を用い、同期検出範囲を2個
設定した場合の図である。即ち電源喪失側の母線電圧1
3が投入可能範囲14外であつても、新に設けた同期継
電器により電圧の大きさと位相を同期検出範囲15で検
出し、同期継電器による自動切替の指令が出されてから
しや断器5が投入されるまでの時間を考慮し、母線の切
替は投入可能範囲14内で実施するようにする。同期検
出範囲15で検出する方法としては、同期継電器は同期
検出範囲11を検出するのと同じものをもう1個用い、
入力する電圧を第4図に示すように同期継電器10とも
う1個の同期継電器17に入力させる電圧の位相を逆に
して180器ずれるようにするだけでよい。他の例とし
て、同期継電器を3個用いて同期検出範囲を更に広げた
方式をのべる。
FIG. 3 is a diagram when two synchronous relays are used and two synchronous detection ranges are set. In other words, the bus voltage 1 on the power loss side
3 is outside the closing possible range 14, the newly installed synchronous relay detects the magnitude and phase of the voltage within the synchronous detection range 15, and the synchronous relay issues an automatic switching command and the mustard breaker 5 is activated. Taking into account the time it takes for the bus to be turned on, the busbar switching is performed within the possible turn-on range 14. The method for detecting in the synchronous detection range 15 is to use another synchronous relay that is the same as that used in the synchronous detection range 11,
As shown in FIG. 4, it is only necessary to reverse the phases of the input voltages to the synchronous relay 10 and the other synchronous relay 17 so that they are shifted by 180 degrees. As another example, we will discuss a method in which three synchronous relays are used to further expand the synchronous detection range.

すなわち第5図に示すように3個の同期継電器により同
期検出範囲11,18,19を設定する。この場合は、
第6図に示すように、同期継電器10,20,21は全
く同じものを用い、入力する電圧を同期継電器10に対
しそれぞれ120すずれたもの、2401ずれたものと
ずらしていけばよい。自動切替の指令としては第7図に
示すように、同期検出範囲11における同期継電器10
の動作による接点22が0Nした場合と、同期検出範囲
18における同期継電器20の動作による接点23の0
Nの条件に同期検出範囲19における同期継電器21の
動作による接点24の0Nの条件が組み合わさつた場合
に発せられる。尚Xl,X2は補助継電器である。この
場合、同期継電器が3個になつたから自動切替の可能の
チヤンスが3倍になるというのではなく、切替えられる
側の母線がどちらの母線であつても安全に自動切替を行
なえるという目的のために同期継電器を使用できるもの
である。以上説明のごとく、同期継電器を複数個用いる
ことによりいずれも同期継電器を1個用いる時に比較し
て自動切替を可能とするチヤンスは大幅に増加され、こ
れにより、プラントの信頼性が大幅に向上する利点が得
られる。
That is, as shown in FIG. 5, synchronous detection ranges 11, 18, and 19 are set by three synchronous relays. in this case,
As shown in FIG. 6, the same synchronous relays 10, 20, and 21 may be used, and the input voltages may be shifted by 120 degrees and 2401 points, respectively, with respect to the synchronous relay 10. As shown in FIG. 7, the command for automatic switching is as follows:
When the contact 22 becomes 0N due to the operation of
It is generated when the condition of N is combined with the condition of ON of the contact 24 due to the operation of the synchronous relay 21 in the synchronous detection range 19. Note that Xl and X2 are auxiliary relays. In this case, it is not that the chance of automatic switching is tripled because there are now three synchronous relays, but that automatic switching can be performed safely regardless of which bus bar is being switched. A synchronous relay can be used for this purpose. As explained above, by using multiple synchronous relays, the chances of automatic switching are greatly increased compared to when using one synchronous relay, and this greatly improves the reliability of the plant. Benefits can be obtained.

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

第1図は母線の自動切替を行なう運用系統図、第2図は
従来の同期継電器1個により同期検出を説明するための
図、第3図、第5図は本発明による複数個の同期継電器
を用いて、同期検出を説明するための図、第4図、第6
図は本発明の複数個の同期継電器を用いる時の同期継電
器への入力電圧の接続を示す図、第7図は本発明の一実
施例である同期継電器を3個用いて同期を検出し、母線
自動切替の指令を出すシーケンスを示す図である。 1,2・・・・・・電源、3,4,5・・・・・・しや
断器、6,7・・・・・・母線、8,8′・・・・・・
計器用変圧器、9,9′・・・・・・負荷、10,17
,20,21・・・・・・同期継電器、11,15,1
8,19・・・・・・同期検出範囲、12・・・・・・
健全側の母線電圧、13・・・・・・電源喪失側の残留
電圧による母線電圧、14・・・・・伯動切替が可能で
あるしや断器5の投入範囲。
Figure 1 is an operational system diagram for automatic bus switching, Figure 2 is a diagram for explaining synchronization detection using one conventional synchronous relay, and Figures 3 and 5 are diagrams showing multiple synchronous relays according to the present invention. Figures 4 and 6 for explaining synchronization detection using
The figure shows the connection of input voltage to a synchronous relay when using a plurality of synchronous relays of the present invention, and Fig. 7 shows synchronization detected using three synchronous relays according to an embodiment of the present invention, It is a figure which shows the sequence which issues the command of bus bar automatic switching. 1, 2...Power supply, 3, 4, 5...Shipping switch, 6,7...Bus bar, 8,8'...
Potential transformer, 9, 9'...Load, 10, 17
,20,21...Synchronous relay, 11,15,1
8, 19...Synchronization detection range, 12...
Bus voltage on healthy side, 13... Bus voltage due to residual voltage on power loss side, 14... Closing range of circuit breaker 5 that is capable of passive switching.

Claims (1)

【特許請求の範囲】[Claims] 1 互に異なる系統電源に接続され、夫々別個の負荷に
給電する二つの系統母線と、これら二つの系統母線を連
絡する母線連絡しや断器と、前記系統母線に接続されて
系統の受電電圧を計測する計器用変成器とからなる母線
自動切替方式に於て、前記計器用変成器に接続され、こ
の計器用変成器の2次側電圧の電気角位相を360/n
度(nは2以上の整数)ずつ変位させる変位回路と、こ
の変位回路を介して前記計器用変成器に接続されたn個
の同期継電器と、これらの同期継電器から出力される自
動切替指令を前記変位の程度によつて時間調整する投入
時間調整回路とを具備してなる母線自動切替方式。
1. Two system buses that are connected to different system power sources and supply power to separate loads, a bus interconnector or disconnector that connects these two system buses, and a bus interconnector or disconnector that connects to the system bus and controls the power receiving voltage of the system. In the automatic bus switching system, which is connected to the instrument transformer, the electrical angle phase of the secondary voltage of the instrument transformer is changed to 360/n.
A displacement circuit that displaces the voltage by degrees (n is an integer of 2 or more), n synchronous relays connected to the instrument transformer via this displacement circuit, and automatic switching commands output from these synchronous relays. An automatic bus switching system comprising a closing time adjustment circuit that adjusts the time according to the degree of the displacement.
JP12971877A 1977-10-31 1977-10-31 Bus bar automatic switching system Expired JPS5947529B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12971877A JPS5947529B2 (en) 1977-10-31 1977-10-31 Bus bar automatic switching system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12971877A JPS5947529B2 (en) 1977-10-31 1977-10-31 Bus bar automatic switching system

Publications (2)

Publication Number Publication Date
JPS5463344A JPS5463344A (en) 1979-05-22
JPS5947529B2 true JPS5947529B2 (en) 1984-11-20

Family

ID=15016481

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12971877A Expired JPS5947529B2 (en) 1977-10-31 1977-10-31 Bus bar automatic switching system

Country Status (1)

Country Link
JP (1) JPS5947529B2 (en)

Also Published As

Publication number Publication date
JPS5463344A (en) 1979-05-22

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