JPH07201608A - On-load tap changer - Google Patents
On-load tap changerInfo
- Publication number
- JPH07201608A JPH07201608A JP107094A JP107094A JPH07201608A JP H07201608 A JPH07201608 A JP H07201608A JP 107094 A JP107094 A JP 107094A JP 107094 A JP107094 A JP 107094A JP H07201608 A JPH07201608 A JP H07201608A
- Authority
- JP
- Japan
- Prior art keywords
- tap
- count
- switching
- load
- alarm
- 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
Landscapes
- Emergency Alarm Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は負荷時タップ切換装置に
係り、特にタップ選択器の切換回数カウント装置を備え
た負荷時タップ切換装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load tap changer, and more particularly to a load tap changer equipped with a tap selector changeover count device.
【０００２】[0002]
【従来の技術】一般に負荷時タップ切換装置は、切換開
閉器等からなる負荷時タップ切換器と、電動操作機構お
よびそれらを機械的に接合して動力を伝える伝動装置か
ら構成され、負荷時タップ切換変圧器が接続された送配
電系の負荷が変動した場合、変動に対応した電圧変化が
一定値を超えると切換信号発生部からの切換信号により
電動操作機構を操作させて負荷時タップ切換器を駆動す
ることにより負荷時タップ切換変圧器に設けられている
タップを切換え、送配電系の電圧を一定に保っている。
この送配電系に主要幹線であることが多く、万一負荷時
タップ切換装置が故障した場合には広範囲に渡って停電
し、悪影響を及ぼす恐れがある。負荷時タップ切換装置
の故障は大別して、負荷時タップ切換器本体の異常およ
び電動操作機構、制御盤内の異常が有り、前者の場合に
は重大事故に繋がることがあり、その具体的な例として
複数個あるタップ選択器の特定の固定接点ばかりで切換
が行われたような場合にはその特定の接点ばかりが摩耗
してしまい、接触力が低下し究極的には放電を起こすこ
とがある。2. Description of the Related Art Generally, a load tap changer comprises a load tap changer, such as a switching switch, an electric operating mechanism, and a transmission device for mechanically joining them to transmit power. When the load of the power transmission and distribution system to which the switching transformer is connected fluctuates, if the voltage change corresponding to the fluctuation exceeds a certain value, the electric switching mechanism is operated by the switching signal from the switching signal generator to tap the load tap changer. When the load is switched, the taps provided on the tap switching transformer are switched to keep the voltage of the power transmission and distribution system constant.
This power transmission / distribution system is often the main trunk line, and in the unlikely event that the tap switching device under load fails, there is a risk of power failure over a wide area and adverse effects. Failures of the load tap changer are roughly classified into abnormalities in the load tap changer body and an abnormality in the electric operation mechanism and control panel.In the former case, it may lead to a serious accident. As a result, when switching is performed only with a specific fixed contact of a plurality of tap selectors, only the specific contact is worn, the contact force is reduced, and eventually discharge may occur. .
【０００３】従来、負荷時タップ切換器の切換回数は電
動操作機構に設けられた回数計で全タップの累計回数の
みをカウントしていた。このことは切換毎に動作する大
部分の部品の電気的あるいは機械的寿命を判定するため
には有効であるが、ランダムにしか動作しないタップ選
択器の接点のような場合は全タップでの平均値を計算す
ることはできるけれども、個々の固定接点に於ける真の
切換回数を見極めることはできない。Conventionally, the number of times of switching of the tap changer during load has been counted only by the total number of taps by a frequency counter provided in the electric operating mechanism. This is effective for determining the electrical or mechanical life of most of the parts that operate at each switching, but in the case of a tap selector contact that operates only randomly, the average of all taps is used. Although it is possible to calculate the value, it is not possible to determine the true number of switchings at each fixed contact.
【０００４】[0004]
【発明が解決しようとする課題】図２に負荷時タップ切
換装置の構成例解図を示す。図において、タップ選択器
10は変圧器の電圧調整範囲に対応して複数個の固定接点
（図示しないが例えば10，12，14，16あるいは18接点
等）を有しており、必要電圧に応じて、可動接点（図示
しない）により適宜タップを選択できるようになってい
る。またタップ選択器10は電流を遮断しないために、接
触子の寿命は機械的な切換回数で制限されることにな
る。国内の規格では接点の機械的寿命は切換回数80万回
となっており、10接点の負荷時タップ切換装置を例にと
ると１接点当り８万回となる。通常、タップ選択器の寿
命性能は複数個の全固定接点が均等に使用された条件で
検証されるが、フィ―ルドでの条件は必ずしもこの通り
ではなく、特定の少数の固定接点たけが集中的に使用さ
れる場合がある。このような場合には、累計の切換回数
が少なくともタップ選択器10の特定の固定接点では寿命
に達することが考えられる。現状の負荷時タップ切換装
置では電動操作機構７に総切換回数を表示する回数計が
設けられているだけであるため、タップ選択器10の個々
の固定接点の切換回数は運転パタ―ンから推定する他に
確認の方法がない。この為に知らない内にタップ選択器
の特定の固定接点が寿命に達して、突然通電不能による
事故が発生する事もあり得る。FIG. 2 shows a schematic diagram of a configuration example of a load tap switching device. In the figure, tap selector
Reference numeral 10 has a plurality of fixed contacts (not shown, for example, 10, 12, 14, 16 or 18 contacts) corresponding to the voltage adjustment range of the transformer. No) allows you to select the taps as appropriate. Further, since the tap selector 10 does not cut off the current, the life of the contact is limited by the number of mechanical changes. According to domestic standards, the mechanical life of contacts is 800,000 times, and if a 10-contact tap changer under load is taken as an example, it will be 80,000 times per contact. Normally, the life performance of a tap selector is verified under the condition that all fixed contacts are used uniformly, but the condition in the field is not always this, and only a few fixed contacts are concentrated. It may be used for some purposes. In such a case, it is conceivable that the cumulative number of switching operations will reach the end of its service life at least at the particular fixed contact of the tap selector 10. In the current load tap changer, only the electric operation mechanism 7 is provided with a counter for displaying the total number of changes. Therefore, the number of times each fixed contact of the tap selector 10 is changed is estimated from the operation pattern. There is no other way to confirm. For this reason, it is possible that a certain fixed contact of the tap selector reaches the end of its life without knowing it, and suddenly an accident occurs due to being unable to energize.
【０００５】本発明は上記の点を考慮してなされたもの
で、負荷時タップ選択器の切換回数を各タップ毎にカウ
ントできるとともに異常発生の早期検出を可能とした負
荷時タップ切換装置を提供する事を目的とする。The present invention has been made in consideration of the above points, and provides a load tap switching device capable of counting the number of times the load tap selector is switched for each tap and enabling early detection of an abnormality. The purpose is to do.
【０００６】[0006]
【課題を解決するための手段】本発明は、外部指令信号
により駆動される電動操作機構の駆動により複数のタッ
プを有するタップ選択器を切換える負荷時タップ切換装
置において、前記電動操作機構の駆動に伴い発生する信
号と、前記駆動に伴い駆動されるタップ位置検出用のタ
ップ指示装置からの信号とにより各タップの切換回数を
カウントする記憶部と、これらカウント結果が予め設定
された設定値を越えた場合警報を発生させる判定部とを
備えることを特徴とする。SUMMARY OF THE INVENTION The present invention relates to a load tap switching device for switching a tap selector having a plurality of taps by driving an electric operating mechanism driven by an external command signal. A storage unit that counts the number of times each tap is switched by a signal generated together with the signal and a signal from a tap instruction device for tap position detection that is driven with the driving, and these count results exceed a preset set value. And a determination unit for issuing an alarm in the event of a failure.
【０００７】[0007]
【作用】タップ選択器の個々のタップの切換回数を監視
することができ、特定の少数の接点だけが集中的に使用
される様な特異な運転を続けた場合に予想される異状発
生に対しても早期に対応可能となり、事故の未然防止を
図る事が可能となる。[Function] It is possible to monitor the number of times each tap of the tap selector is switched, and to prevent abnormalities that may occur when a specific operation is continued such that only a specific small number of contacts are intensively used. However, it will be possible to respond early and prevent accidents before they happen.
【０００８】[0008]
【実施例】本発明の一実施例を図１乃至図２を参照して
説明する。本実施例による負荷時タップ切換装置は図２
に示すように、変圧器のタンク内に設けられた負荷電流
の遮断を目的とする切換開閉器９とその下部に位置する
タップ選択器10と、変圧器のタンク側壁に設けられた電
動操作機構７、並びにその駆動力をタップ選択器に伝え
る伝動軸８から構成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The tap switching device under load according to this embodiment is shown in FIG.
As shown in FIG. 1, a switching switch 9 for shutting off a load current provided in the tank of the transformer, a tap selector 10 located below the switching switch 9, and an electric operation mechanism provided on the sidewall of the transformer tank. 7, and a transmission shaft 8 that transmits the driving force to the tap selector.
【０００９】図１のブロック図に示すごとく、外部の制
御盤に設けられた切換指令装置２により電動操作機構７
内の昇圧降圧操作用の電磁開閉器１が励磁される事によ
り発生する信号と、それに伴い機構が動作すると共に駆
動されるタップ位置検出用のタップ指示装置11とからの
信号より、各タップ毎あるいは各固定接点毎の切換回数
をカウントして記録する記憶部３、並びにそれらの結果
を表示する表示部４、および規定回数に到達した場合に
はそれを判定し、その内容を表示すると共に警報を出す
判定部５から構成され、これらの記憶部３、表示部４、
判定部５が一体の監視装置６として電動操作機構７内に
設置されている。As shown in the block diagram of FIG. 1, an electric operating mechanism 7 is operated by a switching command device 2 provided on an external control panel.
For each tap, from the signal generated by exciting the electromagnetic switch 1 for step-up / step-down operation in the above, and the signal from the tap indicating device 11 for tap position detection, which is driven together with the operation of the mechanism. Alternatively, a storage unit 3 that counts and records the number of switching times for each fixed contact, a display unit 4 that displays the results thereof, and when the specified number of times has been reached, the determination is made, the content is displayed, and an alarm is issued. And a storage unit 3, a display unit 4,
The determination unit 5 is installed in the electric operation mechanism 7 as an integrated monitoring device 6.
【００１０】そして、電動操作機構のタップ指示装置11
と昇圧降圧操作用の電磁開閉器１からの信号によりタッ
プ選択器10個々の固定接点に於ける真の切換回数を監視
し、各タップ毎の切換回数を記憶部３に記憶し、それら
の結果を表示部４で表示する事により常に状況を確認で
きると共に、判定部５より規定の回数に達した場合に警
報を出す様に作用する。Then, the tap indicating device 11 of the electric operation mechanism
And the signal from the electromagnetic switch 1 for step-up / step-down operation, the true switching frequency of each fixed contact of the tap selector 10 is monitored, and the switching frequency of each tap is stored in the storage unit 3. Is displayed on the display unit 4, the status can be always checked, and the determination unit 5 operates so as to issue an alarm when the specified number of times is reached.
【００１１】上記の実施例では規定の回数に達した場合
に警報を出す様に構成された場合について説明したが、
昇降圧方向や切換範囲、周期のパタ―ンを記憶し演算す
ることにより、事前に規定の回数に達する時期を予測
し、警告を出すこともできる。上記の実施例では監視装
置６を電動操作機構７の内部に収納した場合について説
明したが、遠方に設置された制御盤の中に同装置６を設
けることもできる。In the above embodiment, the case has been described where an alarm is issued when the specified number of times is reached.
By storing and calculating the patterns of the step-up / down direction, the switching range, and the cycle, it is possible to predict in advance when the specified number of times will be reached and issue a warning. In the above embodiment, the case where the monitoring device 6 is housed inside the electric operation mechanism 7 has been described, but the device 6 may be provided in a control panel installed at a distance.
【００１２】[0012]
【発明の効果】以上説明したように、本発明によれば通
常状態では点検が出来なく、しかも現状では累計度数管
理しかされていないタップ選択器の個々の固定的接点毎
の切換回数を監視することができ、特定の少数の接点だ
けが集中的に使用される様な特異な運転を続けた場合に
予想される異状発生に対しても早期に適切な管理が可能
となり、事故の未然防止を図る事が可能となる。As described above, according to the present invention, the number of times of switching for each fixed contact of the tap selector, which cannot be inspected in the normal state and is currently managed only by the cumulative frequency, is monitored. It is possible to prevent the occurrence of accidents in an early stage, by enabling appropriate management even in the event of abnormalities that may occur when a specific operation is continued such that only a few specific contacts are used intensively. It is possible to plan.
【図１】本発明の一実施例の負荷時タップ切換装置の要
部ブロック構成例解図。FIG. 1 is a block diagram showing an example of a block configuration of essential parts of a load tap switching device according to an embodiment of the present invention.
【図２】負荷時タップ切換装置の全体構成図。FIG. 2 is an overall configuration diagram of a load tap switching device.
１…電磁開閉器 ２…切換指令装置 ３…記憶部 ４…表示部 ５…判定部 ６…監視装置 ７…電動操作機構 ８…伝動軸 ９…切換開閉器 10…タップ選択器 11…タップ指示装置 1 ... Electromagnetic switch 2 ... Switching command device 3 ... Storage part 4 ... Display part 5 ... Judgment part 6 ... Monitoring device 7 ... Electric operation mechanism 8 ... Transmission shaft 9 ... Switching switch 10 ... Tap selector 11 ... Tap instruction device
Claims (2)
機構の駆動により複数のタップを有するタップ選択器を
切換える負荷時タップ切換装置において、前記電動操作
機構の駆動に伴い発生する信号と、前記駆動に伴い駆動
されるタップ位置検出用のタップ指示装置からの信号と
により各タップの切換回数をカウントする記憶部と、こ
れらカウント結果が予め設定された設定値を越えた場合
警報を発生させる判定部とを備えることを特徴とする負
荷時タップ切換装置。1. A load tap switching device for switching a tap selector having a plurality of taps by driving an electric operating mechanism driven by an external command signal, and a signal generated when the electric operating mechanism is driven and the drive. A storage unit that counts the number of times each tap is switched by a signal from a tap instruction device for tap position detection that is driven in accordance with the above, and a determination unit that issues an alarm when these count results exceed a preset set value. A tap switching device under load, comprising:
前記カウント結果が前記設定値を越える時期を予想し警
報発生可能である請求項１記載の負荷時タップ切換装
置。2. The load tap switching device according to claim 1, wherein the determination unit is capable of generating an alarm by predicting a time when the count result exceeds the set value by the pattern of the signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP107094A JPH07201608A (en) | 1994-01-11 | 1994-01-11 | On-load tap changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP107094A JPH07201608A (en) | 1994-01-11 | 1994-01-11 | On-load tap changer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07201608A true JPH07201608A (en) | 1995-08-04 |
Family
ID=11491270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP107094A Pending JPH07201608A (en) | 1994-01-11 | 1994-01-11 | On-load tap changer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07201608A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007093025A1 (en) * | 2006-02-17 | 2007-08-23 | Eduardo Pedrosa Santos | System for voltage regulation, control, protection and monitoring of state of changers under power transformer load, voltage regulators, capacitor banks and similar |
| CN104272414A (en) * | 2012-04-27 | 2015-01-07 | 赖茵豪森机械制造公司 | Method for monitoring an on-load tap changer |
-
1994
- 1994-01-11 JP JP107094A patent/JPH07201608A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007093025A1 (en) * | 2006-02-17 | 2007-08-23 | Eduardo Pedrosa Santos | System for voltage regulation, control, protection and monitoring of state of changers under power transformer load, voltage regulators, capacitor banks and similar |
| CN104272414A (en) * | 2012-04-27 | 2015-01-07 | 赖茵豪森机械制造公司 | Method for monitoring an on-load tap changer |
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