JP2731689B2 - High-voltage three-phase distribution line phase switching device - Google Patents
High-voltage three-phase distribution line phase switching deviceInfo
- Publication number
- JP2731689B2 JP2731689B2 JP5068453A JP6845393A JP2731689B2 JP 2731689 B2 JP2731689 B2 JP 2731689B2 JP 5068453 A JP5068453 A JP 5068453A JP 6845393 A JP6845393 A JP 6845393A JP 2731689 B2 JP2731689 B2 JP 2731689B2
- Authority
- JP
- Japan
- Prior art keywords
- phase
- cut
- current
- voltage
- contact switch
- 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
- Supply And Distribution Of Alternating Current (AREA)
- Electronic Switches (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の悪化
や、三相誘導電動機の動作不具合の原因となる。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, which deteriorates the utilization efficiency of the power equipment and causes a malfunction of the three-phase induction motor.
【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、主に結線トランスの片側のみ電圧タップを上
げたり、別系統から給電することによって対処してい
る。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, and is mainly addressed by raising the voltage tap on only one side of the connection transformer or supplying power from another system.
【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４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. 4, a first contact switch 1 is mounted in parallel with a cutting point X of a phase b where a high-voltage three-phase distribution line is cut, and a cutting point X of the phase b is cut. A non-contact switch 2 that performs a high-speed closing operation following the opening of the first contact switch 1 is attached between a point on the load side and a 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うものである。この場合、第１の
有接点開閉器１を開路してから無接点開閉器２を閉じる
までの時間は停電となるので、この時間はできるだけ短
いことが望まれる。しかし停電時間を短くしようとする
あまり、切断される相ｂの電流が完全に遮断される前に
無接点開閉器２を閉じると相間短絡事故となる。従って
無接点開閉器２を閉じるタイミングを人手によりコント
ロールすることは容易ではなかった。This phase switching device comprises a first contact switch 1
Is closed, the cutting point X is cut, and following the opening of the first contact switch 1, the non-contact switch 2 is closed at a high speed and the phase is switched instantaneously. In this case, the time from the opening of the first contact switch 1 to the closing of the non-contact switch 2 is a power failure, and it is desirable that this time be as short as possible. However, if the non-contact switch 2 is closed before the current of the phase b to be cut off is completely cut off due to too short a power outage time, an inter-phase short-circuit accident will occur. Therefore, it was not easy to manually control the timing of closing the contactless switch 2 manually.
【０００６】[0006]
【発明が解決しようとする課題】本発明は上記した従来
の相切替装置の問題点を解決し、無接点開閉器を閉じる
タイミングを適切にコントロールすることにより、相間
短絡事故を防止しつつ半サイクル以内の短時間の停電で
相切替を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 conventional phase switching device, and appropriately controls the timing of closing a non-contact switch to prevent a short circuit between phases and prevent a half cycle. The present invention has been made in order to provide a phase switching device for a high-voltage three-phase distribution line that can perform phase switching with a short-time power outage within a range.
【０００７】[0007]
【課題を解決するための手段】本発明の高圧三相配電線
の相切替装置は、高圧三相配電線の切断される相の切断
点と並列に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無接
点開閉器を取り付けた相切替装置において、切断される
相の電流が遮断されたときに電流の零点を検出するCT
と、このCTが電流の零点を検出した後、数msの間CTに電
流が流れていないことを確認したうえで上記無接点開閉
器を閉じる制御装置とを設けたことを特徴とするもので
ある。According to the present invention, there is provided a phase switching device for a high-voltage three-phase distribution line, in which a switch is mounted in parallel with a cutting point of a phase to be cut off of the high-voltage three-phase distribution line, and a disconnection point of the phase to be cut. CT that detects the zero point of the current when the current of the phase to be cut off is cut off in a phase switching device with a non-contact switch mounted between a point on the load side and the connected phase
And, after the CT detects a zero point of the current, after confirming that no current flows through the CT for several ms, a control device for closing the non-contact switch is provided. is there.
【０００８】[0008]
【作用】本発明においては、切断される相の電流が遮断
されたときにその零点をCTが検出し、このCTが電流の零
点を検出した後、数msの間CTに電流が流れていないこと
を制御装置が確認したうえで無接点開閉器を閉じる。こ
のために切断される相と接続される相とが短絡するおそ
れはなくなり、しかも半サイクル以内の短時間の停電で
相切替を行うことができる。In the present invention, when the current of the phase to be cut off is cut off, the CT detects the zero point, and after the CT detects the zero point of the current, no current flows through the CT for several ms. After confirming this, the contactless switch is closed. For this reason, there is no possibility that the phase to be disconnected and the phase to be connected are short-circuited, and the phase can be switched by a short-time power failure within half a cycle.
【０００９】[0009]
【実施例】以下に本発明を実施例により更に詳細に説明
する。 〔実施例１〕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に切り替える装置の第１の
実施例を示すもので、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。The present invention will be described in more detail with reference to the following examples. [Embodiment 1] FIG. 1 shows a first embodiment of an apparatus for switching a single-phase load L connected between a and b of a high-voltage three-phase distribution line to ac, wherein a phase in which b is cut is shown. , C are connected phases, and X is a cutting point. The first contact switch 1 is mounted at a position parallel to the cutting point X of the phase b to be cut. A contactless switch 2 and a second contact switch 3 are mounted in parallel between a phase c connected to a point on the load side of the cut point X of the phase b to be cut. .
【００１０】切断される相ｂにはCT４が設けられてお
り、切断される相ｂに流れる電流を検出している。また
制御装置５は、切断される相の電流が遮断されたときに
その零点をCT４が検出した後、数msの間CTに電流が流れ
ていないことを確認したうえで無接点開閉器２を閉じる
機能を備えている。[0010] The phase b to be cut is provided with a CT 4 to detect a current flowing through the phase b to be cut. After detecting the zero point when the current of the phase to be cut off is interrupted by the CT 4, the control device 5 confirms that no current flows through the CT for several ms and then switches the contactless switch 2 on. It has a close function.
【００１１】この実施例の装置による相切替えの手順は
次の通である。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を開く。CT４は切断される相ｂの遮断された電
流の零点を検出し、制御装置５は上記のようにその後数
msの間CTに電流が流れていないことを確認したうえで無
接点開閉器２を閉じる。このときの電流は図２のように
なる。これにより数msの停電で相の切替えが行われるの
で、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。このように本発明の装置によれば半サイクル以内
の短時間の停電で相切替を行うことができるうえ、切断
される相ｂと接続される相ｃとが短絡するおそれをなく
することができる。The procedure of phase switching by the apparatus of this embodiment is as follows. First, the first contact switch 1 is closed, the cutting point X of the phase b to be cut is cut, and the first contact switch 1 is opened. The CT 4 detects the zero point of the interrupted current of the phase b to be cut off, and the control device 5
After confirming that no current is flowing through the CT for ms, the contactless switch 2 is closed. The current at this time is as shown in FIG. As a result, phase switching is performed after a power failure of several milliseconds. Therefore, if the second contact switch 3 is further closed and the connection is made in parallel with the second contact switch 3 as indicated by a broken line. Good. As described above, according to the apparatus of the present invention, phase switching can be performed with a short-time power failure within half a cycle, and the possibility of short-circuit between the disconnected phase b and the connected phase c can be eliminated. .
【００１２】〔実施例２〕図１の実施例では切断される
相ｂの切断点Ｘと並列な位置に第１の有接点開閉器１を
取付け、これにより切断される相ｂの電流を遮断した。
しかし図３に示す第２の実施例のように、第１の有接点
開閉器１と並列に他の無接点開閉器６を取付けることも
できる。この無接点開閉器６は、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を切断したうえで
閉じられる。そして次に有接点開閉器１を開いて切断さ
れる相ｂの電流を全て無接点開閉器６に流した状態とし
たうえ、無接点開閉器６を開いて切断される相ｂの電流
を遮断する。[Embodiment 2] In the embodiment of FIG. 1, a first contact switch 1 is mounted at a position parallel to a cutting point X of a phase b to be cut, thereby cutting off the current of the phase b to be cut. did.
However, as in the second embodiment shown in FIG. 3, another contactless switch 6 can be mounted in parallel with the first contact switch 1. The contactless switch 6 is a first contact switch 1
Is closed after cutting at the cutting point X of the phase b to be cut by closing. Then, the contact switch 1 is opened and the current of the phase b to be cut off is entirely passed through the contactless switch 6, and then the current of the phase b cut by opening the contactless switch 6 is cut off. I do.
【００１３】その後は第１の実施例と同様であり、CT４
が切断される相ｂの遮断された電流の零点を検出し、制
御装置５は上記のようにその後数msの間CTに電流が流れ
ていないことを確認したうえで無接点開閉器２を閉じ
る。この第２の実施例では切断される相ｂの遮断を無接
点開閉器２によって行うので、第１の実施例のように第
１の有接点開閉器１により電流の遮断を行うよりも迅速
な動作が可能であるとともに、アーク電圧発生による電
圧低下を引き起こさない利点がある。Thereafter, the operation is the same as that of the first embodiment.
The controller 5 detects the zero point of the interrupted current of the phase b at which the current is cut off, and closes the non-contact switch 2 after confirming that no current flows through the CT for several ms thereafter as described above. . In the second embodiment, the cut-off of the phase b to be cut off is performed by the non-contact switch 2, so that the current can be cut off more quickly than by the first contact switch 1 as in the first embodiment. There is an advantage that operation is possible and that a voltage drop due to generation of an arc voltage is not caused.
【００１４】[0014]
【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、切断される相と接続される相
とが短絡するおそれを完全に防止しつつ、半サイクル以
内の短時間の停電で相切替を行うことができる利点があ
る。また何らかの原因により切断される相の電流遮断が
完全に行われていない場合には、相切替え動作を中止し
て短絡事故を未然に防止することもできる。As described above, the phase switching device for a high-voltage three-phase distribution line according to the present invention completely prevents the possibility of a short circuit between a phase to be disconnected and a connected phase, and reduces the possibility of short-circuiting within a half cycle. There is an advantage that phase switching can be performed with a short power outage. If the current cutoff of the phase to be disconnected due to some cause is not completely performed, the phase switching operation can be stopped to prevent a short circuit accident.
【図１】本発明の第１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 a first embodiment of the present invention.
【図２】相切替時の電流を示す波形図である。FIG. 2 is a waveform diagram showing a current at the time of phase switching.
【図３】本発明の第２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. 3 is a circuit diagram showing a phase switching device of a high-voltage three-phase distribution line according to a second embodiment of the present invention.
【図４】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. 4 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 ＣＴ ５ 制御装置 ６ 他の無接点開閉器 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 Contactless switch 3 Second contact switch 4 CT 5 Control device 6 Other contact switch b Phase to be disconnected c Connected phase X Disconnection point
Claims (1)
と並列に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無接点
開閉器を取り付けた相切替装置において、切断される相
の電流が遮断されたときに電流の零点を検出するCTと、
このCTが電流の零点を検出した後、数msの間CTに電流が
流れていないことを確認したうえで上記無接点開閉器を
閉じる制御装置とを設けたことを特徴とする高圧三相配
電線の相切替装置。A switch is mounted in parallel with a cut point of a phase to be cut of a high-voltage three-phase distribution line, and a non-contact is provided between a point connected to a load side of the cut point of the cut phase and a connected phase. A CT for detecting a zero point of the current when the current of the phase to be disconnected is interrupted in the phase switching device equipped with a switch;
After detecting the zero point of the current by the CT, after confirming that no current flows through the CT for several ms, a control device for closing the non-contact switch is provided. Phase switching device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5068453A JP2731689B2 (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 |
|---|---|---|---|
| JP5068453A JP2731689B2 (en) | 1993-03-26 | 1993-03-26 | High-voltage three-phase distribution line phase switching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06284581A JPH06284581A (en) | 1994-10-07 |
| JP2731689B2 true JP2731689B2 (en) | 1998-03-25 |
Family
ID=13374138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5068453A Expired - Lifetime JP2731689B2 (en) | 1993-03-26 | 1993-03-26 | High-voltage three-phase distribution line phase switching device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2731689B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2648777B2 (en) * | 1986-04-16 | 1997-09-03 | ニシム電子工業株式会社 | Temporary switching and restoration method of out-of-phase distribution line |
| 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 |
-
1993
- 1993-03-26 JP JP5068453A patent/JP2731689B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06284581A (en) | 1994-10-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tian et al. | 400 V/1000 kVA hybrid automatic transfer switch | |
| WO2019104793A1 (en) | Micro-loss combined mechanical direct current circuit breaker and control method therefor | |
| JP4955363B2 (en) | Inverter device | |
| JP2022025016A (en) | Drawable hybrid switching device | |
| CN106451500B (en) | Interphase load transfer terminal device based on transient waveform fitting | |
| US7227325B1 (en) | Method and arrangement for protecting a frequency converter | |
| JP2731689B2 (en) | High-voltage three-phase distribution line phase switching device | |
| JP4906223B2 (en) | Method and apparatus for controlling an electrical switchgear | |
| JP2773763B2 (en) | High-voltage three-phase distribution line phase switching device | |
| JP2739022B2 (en) | High-voltage three-phase distribution line phase switching device | |
| JP3327836B2 (en) | Phase switching device for distribution lines | |
| CN218788678U (en) | Dual-power switching device | |
| JP2648777B2 (en) | Temporary switching and restoration method of out-of-phase distribution line | |
| KR102287066B1 (en) | Solar inverter system preventing the switching arc whe opening and closing contacts | |
| KR20040076376A (en) | Start control circuit of hybrid motor starter | |
| CN215186685U (en) | Point switch driving circuit for preventing ignition arc of relay node from occurring | |
| CN210941437U (en) | Ground automatic neutral section passing processing device | |
| JPH0799728A (en) | Phase changeover apparatus of three-phase distribution line | |
| CN110535110B (en) | Phase selection switching-on and switching-off control method and device for extra-high voltage alternating current transformer | |
| JPH06165389A (en) | Three phase changeover device for three phase distribution cable | |
| JP3564475B2 (en) | Uninterruptible power system | |
| JP3766788B2 (en) | Uninterruptible power system | |
| JPH0678461A (en) | Switching device of phase of high-tension three-phase distribution line | |
| JPH07222361A (en) | Method and apparatus for switching phase of three-phase distribution line | |
| JPH07282691A (en) | Commutation type dc circuit breaker |
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: 19971205 |