JP2739022B2 - High-voltage three-phase distribution line phase switching device - Google Patents
High-voltage three-phase distribution line phase switching deviceInfo
- Publication number
- JP2739022B2 JP2739022B2 JP5067860A JP6786093A JP2739022B2 JP 2739022 B2 JP2739022 B2 JP 2739022B2 JP 5067860 A JP5067860 A JP 5067860A JP 6786093 A JP6786093 A JP 6786093A JP 2739022 B2 JP2739022 B2 JP 2739022B2
- Authority
- JP
- Japan
- Prior art keywords
- contact switch
- phase
- switch
- voltage
- parallel
- 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 - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Landscapes
- Electronic Switches (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、三相負荷電流の不平衡
が大きい高圧三相配電線において、単相負荷が接続され
ている相を残りの相に切り替えるために使用される高圧
三相配電線の相切替装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-voltage three-phase distribution line used for switching a phase connected to a single-phase load to a remaining phase in a high-voltage three-phase distribution line having a large three-phase load current imbalance. ).
【０００２】[0002]
【従来の技術】高圧三相配電線に対する単相負荷の接続
は、三相中の任意の二相に対して行われることとなる
が、実際の系統においては単相負荷が特定の二相に集中
して接続されることが多い。このような場合には三相負
荷電流の不平衡状態を招き、電力設備の利用効率が悪く
なったり、三相誘導モータ等の負荷にも悪影響を及ぼし
たりする。2. Description of the Related Art A single-phase load is connected to a high-voltage three-phase distribution line for any two of the three phases, but in an actual system, the single-phase load is concentrated on a specific two-phase. Often connected. In such a case, an unbalanced state of the three-phase load current is caused, and the utilization efficiency of the power equipment deteriorates, and the load of the three-phase induction motor or the like is adversely affected.
【０００３】そこでこのような場合には、単相負荷が接
続されている相を残りの相に切り替えることが好まし
い。ところがこのためには長時間の停電工事を必要とす
るので、通常は相の切替えを行うことなく運用されてい
ることが多かった。Therefore, in such a case, it is preferable to switch the phase to which the single-phase load is connected to the remaining phases. However, this requires a long-term power outage work, so that it is often operated without switching the phases.
【０００４】上記の問題を解決するために、本発明者等
は実質的に無停電で相の切替えを行うことができる装置
を開発し、既に特願平4-228772号等として出願した。こ
の先願の相切替装置は、図２に示すように高圧三相配電
線の切断される相ｂの切断点Ｘと並列に第１の有接点開
閉器１を取り付けるとともに、この相ｂの切断点Ｘより
も負荷側の点と接続される相ｃとの間に、前記第１の有
接点開閉器１の開路に引続き高速で閉動作を行う無接点
開閉器２を取付け、さらにこの無接点開閉器２と並列に
この無接点開閉器２の閉動作に引続き閉動作を行う第２
の有接点開閉器３を取り付けたものである。In order to solve the above problem, the present inventors have developed a device capable of performing phase switching substantially without power interruption, and have already filed an application as Japanese Patent Application No. 4-228772. In the phase switching device of the prior application, as shown in FIG. 2, a first contact switch 1 is mounted in parallel with a cutting point X of a phase b of a high-voltage three-phase distribution line, and a cutting point X of the phase b is cut. A non-contact switch 2 that closes at a high speed following the opening of the first contact switch 1 is attached between a point on the load side and the connected phase c. 2 that performs a closing operation following the closing operation of the contactless switch 2 in parallel with
The contact switch 3 is mounted.
【０００５】この相切替装置は、第１の有接点開閉器１
を閉として切断点Ｘを切断したうえ、第１の有接点開閉
器１の開路に引き続いて無接点開閉器２を高速で閉じて
瞬時に相の切替えを行い、更に第２の有接点開閉器３を
閉じたうえでこの第２の有接点開閉器３と並列に結線を
行うという手順で工事を行うものである。This phase switching device comprises a first contact switch 1
Is closed to cut the cutting point X, and after the opening of the first contact switch 1, the non-contact switch 2 is closed at a high speed for instantaneous phase switching, and further the second contact switch is opened. The construction is performed in such a manner that the connection is performed in parallel with the second contact switch 3 after closing the switch 3.
【０００６】ところが実際には、無接点開閉器２に使用
される半導体スイッチング素子のターンオンやターンオ
フの際の過電圧や急峻な電圧変化を低減し、さらに電源
や負荷側からの過渡電圧から無接点開閉器２に使用され
る半導体スイッチング素子を保護したりスイッチング損
失を低減させるために、無接点開閉器２には半導体スイ
ッチング素子と並列にスナバ回路４が設けられる。この
ため、第１の有接点開閉器１が開路した後に無接点開閉
器２が閉じるまでの間はこのスナバ回路４を通じて漏れ
電流が発生する。However, in practice, it is possible to reduce an overvoltage or a steep voltage change at the time of turning on or off a semiconductor switching element used for the non-contact switch 2, and to further reduce a non-contact switching based on a transient voltage from a power supply or a load side. The contactless switch 2 is provided with a snubber circuit 4 in parallel with the semiconductor switching element in order to protect the semiconductor switching element used in the switch 2 and reduce the switching loss. Therefore, a leakage current is generated through the snubber circuit 4 until the contactless switch 2 closes after the first contact switch 1 opens.
【０００７】通常の切替え動作ではこの時間はごく短い
ためにほとんど問題は生じない。しかし、もし無接点開
閉器２が何らかの原因で閉動作を行わず、しかも第２の
有接点開閉器３を投入することもできないような故障が
発生すると、スナバ回路４を通じて電流が流れ続け危険
であるため、故障の修理を行うこともできない事態とな
る。In a normal switching operation, since this time is very short, there is almost no problem. However, if a failure occurs such that the non-contact switch 2 does not perform the closing operation for some reason and the second contact switch 3 cannot be turned on, current continues to flow through the snubber circuit 4 and is dangerous. Therefore, it is impossible to repair the failure.
【０００８】[0008]
【発明が解決しようとする課題】本発明は上記した先願
の相切替装置の問題点を解決し、無接点開閉器が何らか
の原因で閉動作を行わず、しかも第２の有接点開閉器を
投入することもできないような故障が発生したときに
も、故障の修理等を安全に行えるようにした高圧三相配
電線の相切替装置を提供するためになされたものであ
る。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the phase switching device of the prior application, in which the non-contact switch does not perform the closing operation for some reason, and furthermore, the second contact switch is used. The present invention has been made to provide a phase switching device for a high-voltage three-phase distribution line that can safely perform a repair or the like even when a failure that cannot be inserted occurs.
【０００９】[0009]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明は、高圧三相配電線の切断される相
の切断点と並列に第１の有接点開閉器を取り付けるとと
もに、切断される相の切断点よりも負荷側の点と接続さ
れる相との間に、前記第１の有接点開閉器の開路に引続
き高速で閉動作を行う無接点開閉器を取付け、さらにこ
の無接点開閉器と並列にこの無接点開閉器の閉動作に引
続き閉動作を行う第２の有接点開閉器を取り付けた相切
替装置において、前記無接点開閉器の半導体スイッチン
グ素子と並列にスナバ回路を設けるとともに、この第２
の有接点開閉器に並列かつ無接点開閉器と直列に、第３
の有接点開閉器を取り付けたことを特徴とするものであ
る。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a first contact switch in parallel with a cutting point of a phase to be cut of a high-voltage three-phase distribution line. A non-contact switch that performs a high-speed closing operation following the opening of the first contact switch is attached between a phase connected to a point on the load side of the cut point of the phase to be connected, and In a phase switching device having a second contact switch which performs a closing operation following the closing operation of the contactless switch in parallel with the contact switch, a semiconductor switch of the contactless switch is provided.
A snubber circuit is provided in parallel with the
In parallel with the contact switch of the above and in series with the contactless switch, the third
Is mounted.
【００１０】[0010]
【作用】本発明においては、無接点開閉器と直列に第３
の有接点開閉器を取り付けたので、無接点開閉器が何ら
かの原因で閉動作を行わず、しかも第２の有接点開閉器
を投入することもできないような故障が発生したときに
は、この第３の有接点開閉器を開路することにより、無
接点開閉器の半導体スイッチング素子と並列なスナバ回
路を通じて流れる漏れ電流を遮断することができる。こ
のため、修理等が安全に行えることとなる。According to the present invention, the third switch is connected in series with the contactless switch.
When a failure occurs such that the non-contact switch does not close for any reason and the second contact switch cannot be turned on, the third contact switch is attached. by open the reed switch, no
Leakage current flowing through a snubber circuit in parallel with the semiconductor switching element of the contact switch can be cut off. Therefore, repair and the like can be performed safely.
【００１１】[0011]
【実施例】以下に本発明を図１に示す実施例により更に
詳細に説明する。図１は高圧三相配電線のａ−ｂ間に接
続されている単相負荷Ｌをａ−ｃに切り替える例を示す
もので、ｂを切断される相、ｃを接続される相、Ｘを切
断点とする。切断される相ｂの切断点Ｘと並列な位置に
第１の有接点開閉器１が取り付けられている。また切断
される相ｂの切断点Ｘよりも負荷側の点と接続される相
ｃとの間には、無接点開閉器２と第２の有接点開閉器３
とが並列に取り付けられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the embodiment shown in FIG. FIG. 1 shows an example in which a single-phase load L connected between a and b of a high-voltage three-phase distribution line is switched to ac, wherein b is disconnected, c is connected, and X is disconnected. Point. The first contact switch 1 is mounted at a position parallel to the cutting point X of the phase b to be cut. The contactless switch 2 and the second contact switch 3 are connected between a phase c connected to a point on the load side of the cut point X of the phase b to be cut.
And are mounted in parallel.
【００１２】無接点開閉器２は従来と同様に第１の有接
点開閉器１の開路に引続き高速で閉動作を行うものであ
り、実施例では逆並列に接続されたサイリスタ素子2aと
その駆動回路2bとからなる。また前記したようにこのサ
イリスタ素子2aには、過電圧や急峻な電圧変化を低減す
るためのスナバ回路４が並列に接続されている。一方、
第２の有接点開閉器３は無接点開閉器２の閉動作に引続
き閉動作を行うものである。The contactless switch 2 performs a closing operation at a high speed following the opening of the first contact switch 1 as in the prior art. In the embodiment, the thyristor element 2a connected in antiparallel and its drive And a circuit 2b. Further, as described above, the thyristor element 2a reduces overvoltage and steep voltage change.
Because of the snubber circuit 4 is connected in parallel. on the other hand,
The second contact switch 3 performs a closing operation following the closing operation of the contactless switch 2.
【００１３】更に本発明では、第２の有接点開閉器に並
列であってかつ無接点開閉器２と直列に、第３の有接点
開閉器５が取り付けてある。この有接点開閉器５はスナ
バ回路４を通じて流れる数Ａ程度の漏れ電流を遮断する
ためのものであるため、遮断容量は小さなものでよい
が、例えば7.2kV の線間電圧に耐えることができる耐電
圧特性を持つ必要がある。この第３の有接点開閉器５は
常時閉じておくものとする。Further, in the present invention, a third contact switch 5 is mounted in parallel with the second contact switch and in series with the non-contact switch 2. Since this contact switch 5 is for interrupting a leakage current of about several A flowing through the snubber circuit 4, the interrupting capacity may be small, but for example, it can withstand a line voltage of 7.2 kV. Must have voltage characteristics. It is assumed that the third contact switch 5 is always closed.
【００１４】この実施例の装置による相切替えの手順は
従来のものと同様であり、まず第１の有接点開閉器１を
閉として切断される相ｂの切断点Ｘを切断したうえ、第
１の有接点開閉器１の開路に引き続いて無接点開閉器２
を高速で閉じる。これにより瞬時に相の切替えが行われ
ることとなる。そしてこの状態から更に第２の有接点開
閉器３を閉じたうえで、この第２の有接点開閉器３と並
列に破線のように結線を行えばよい。The procedure of the phase switching by the apparatus of this embodiment is the same as that of the conventional one. First, the first contact switch 1 is closed to cut the cutting point X of the phase b to be cut, and then the first contact switch 1 is closed. Contact switch 2 followed by contactless switch 2
Close at high speed. As a result, the phase is switched instantaneously. Then, after the second contact switch 3 is further closed from this state, connection may be made in parallel with the second contact switch 3 as indicated by a broken line.
【００１５】しかしなんらかの原因により、無接点開閉
器２のサイリスタが点弧せず、しかも第２の有接点開閉
器３を投入することもできないような事故が発生したと
きには、スナバ回路４を通じて漏れ電流が流れ続けるこ
ととなり、そのままでは危険であるために修理等を行え
ない。しかし本発明では無接点開閉器２と直列な第３の
有接点開閉器５を開路することにより、容易に漏れ電流
を遮断することができるから、感電のおそれなく無接点
開閉器２等の修理が可能となる。However, if for some reason an accident occurs in which the thyristor of the contactless switch 2 does not fire and the second contact switch 3 cannot be turned on, the leakage current through the snubber circuit 4 Will continue to flow, and as it is dangerous, repairs and the like cannot be performed. However, in the present invention, since the leakage current can be easily cut off by opening the third contact switch 5 in series with the contactless switch 2, repair of the contactless switch 2 and the like without fear of electric shock. Becomes possible.
【００１６】[0016]
【発明の効果】以上に説明したように、本発明の高圧三
相配電線の相切替装置は第２の有接点開閉器に並列かつ
無接点開閉器と直列に第３の有接点開閉器を取り付けた
ので、無接点開閉器が何らかの原因で閉動作を行わず、
しかも第２の有接点開閉器を投入することもできないよ
うな故障が発生したときには、この第３の有接点開閉器
を開路することにより、スナバ回路を通じて流れる漏れ
電流を遮断することができ、修理等を安全に行える利点
がある。As described above, in the phase switching device for a high-voltage three-phase distribution line according to the present invention, the third contact switch is mounted in parallel with the second contact switch and in series with the non-contact switch. Therefore, the contactless switch does not close for any reason,
In addition, when a failure occurs in which the second contact switch cannot be turned on, the leakage current flowing through the snubber circuit can be cut off by opening the third contact switch, and the repair can be performed. There is an advantage that can be performed safely.
【図１】本発明の実施例の高圧三相配電線の相切替装置
を示す回路図である。FIG. 1 is a circuit diagram illustrating a phase switching device of a high-voltage three-phase distribution line according to an embodiment of the present invention.
【図２】先願の高圧三相配電線の相切替装置を示す回路
図である。FIG. 2 is a circuit diagram showing a phase switching device for a high-voltage three-phase distribution line of the prior application.
１ 第１の有接点開閉器 ２ 無接点開閉器 ３ 第２の有接点開閉器 ４ スナバ回路 ５ 第３の有接点開閉器 ｂ 切断される相 ｃ 接続される相 Ｘ 切断点 DESCRIPTION OF SYMBOLS 1 First contact switch 2 Non-contact switch 3 Second contact switch 4 Snubber circuit 5 Third contact switch b Phase to be disconnected c Connected phase X Disconnection point
Claims (1)
と並列に第１の有接点開閉器を取り付けるとともに、切
断される相の切断点よりも負荷側の点と接続される相と
の間に、前記第１の有接点開閉器の開路に引続き高速で
閉動作を行う無接点開閉器を取付け、さらにこの無接点
開閉器と並列にこの無接点開閉器の閉動作に引続き閉動
作を行う第２の有接点開閉器を取り付けた相切替装置に
おいて、前記無接点開閉器の半導体スイッチング素子と
並列にスナバ回路を設けるとともに、この第２の有接点
開閉器に並列かつ無接点開閉器と直列に、第３の有接点
開閉器を取り付けたことを特徴とする高圧三相配電線の
相切替装置。A first contact switch is mounted in parallel with a cutting point of a phase to be cut of a high-voltage three-phase distribution line, and a phase connected to a point on the load side of the cutting point of the phase to be cut. And a non-contact switch that performs a high-speed closing operation following the opening of the first contact switch, and further closes the closing operation of the non-contact switch in parallel with the non-contact switch. In the phase switching device equipped with a second contact switch for performing the above , the semiconductor switching element of the contactless switch and
A phase switching device for a high-voltage three-phase distribution line , wherein a snubber circuit is provided in parallel, and a third contact switch is attached to the second contact switch in parallel and in series with the non-contact switch. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5067860A JP2739022B2 (en) | 1993-03-26 | 1993-03-26 | High-voltage three-phase distribution line phase switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5067860A JP2739022B2 (en) | 1993-03-26 | 1993-03-26 | High-voltage three-phase distribution line phase switching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06284580A JPH06284580A (en) | 1994-10-07 |
| JP2739022B2 true JP2739022B2 (en) | 1998-04-08 |
Family
ID=13357117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5067860A Expired - Lifetime JP2739022B2 (en) | 1993-03-26 | 1993-03-26 | High-voltage three-phase distribution line phase switching device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2739022B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03218229A (en) * | 1990-01-24 | 1991-09-25 | Nishimu Denshi Kogyo Kk | Incoming line switch for underground power distribution line and switching method for uninterruptible power supply |
| TW399743U (en) * | 1999-09-15 | 2000-07-21 | Ind Tech Res Inst | Wafer back protection device |
-
1993
- 1993-03-26 JP JP5067860A patent/JP2739022B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06284580A (en) | 1994-10-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2166225C (en) | Circuit breaker and circuit breaking apparatus | |
| US6075684A (en) | Method and arrangement for direct current circuit interruption | |
| US5770897A (en) | Hybrid solid state switch | |
| JPH11234894A (en) | Circuit breaker employing semiconductor device | |
| AU2018238950B2 (en) | Power distribution system | |
| US5706158A (en) | Method for short-circuit current limiting on an electrical power transmission line and configuration for short-circuit limiting | |
| JP3160414B2 (en) | Conversion device | |
| CN109417348B (en) | Protection of semiconductors in power converters | |
| CN115280448A (en) | Fault current limiter circuit breaker | |
| US6960844B1 (en) | Electric switching device | |
| JP2739022B2 (en) | High-voltage three-phase distribution line phase switching device | |
| EP0542507A2 (en) | Power conversion system | |
| WO1999009631A1 (en) | System interconnecting device and decentralized power supply equipped with the same and having instantaneous voltage drop preventing function | |
| US5115389A (en) | Dc power supply circuit arrangement | |
| JP2731689B2 (en) | High-voltage three-phase distribution line phase switching device | |
| KR101999334B1 (en) | N-phase AC Solid-State Circuit Breaker and Circuit thereof | |
| EP4369548A1 (en) | High speed protection for phase balancer with zig-zag transformer | |
| KR102236955B1 (en) | Vcs soft starter for current switch type | |
| JP2773763B2 (en) | High-voltage three-phase distribution line phase switching device | |
| CN116417294A (en) | Contactor and control method thereof | |
| KR100317017B1 (en) | Automatic transfer switch using a closed-transition neutral contact unit | |
| JP2001333537A (en) | Power supply facility | |
| JP2002093291A (en) | Semiconductor switch and its control method | |
| JPH06165389A (en) | Three phase changeover device for three phase distribution cable | |
| US20050258024A1 (en) | Switchgear assembly for distribution of electrical power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19980106 |