JP4592223B2 - Drive control device for tap changer during load - Google Patents
Drive control device for tap changer during load Download PDFInfo
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- JP4592223B2 JP4592223B2 JP2001204237A JP2001204237A JP4592223B2 JP 4592223 B2 JP4592223 B2 JP 4592223B2 JP 2001204237 A JP2001204237 A JP 2001204237A JP 2001204237 A JP2001204237 A JP 2001204237A JP 4592223 B2 JP4592223 B2 JP 4592223B2
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Description
【０００１】
【発明の属する技術分野】
この発明は、電力用変圧器等に設けられる負荷時タップ切換器の切換速度を制御する駆動制御装置に関するものである。
【０００２】
【従来の技術】
図５に示すように、変圧器タンクTRTに取り付けられた負荷時タップ切換器LTCは、タップ切換器TS、転換器RS、切換開閉器DS、伝達機構DTとを有し、変圧器が励磁されている状態又は負荷がかかった状態で、変圧器タンクTRTの側壁に設置された電動駆動装置MDによって連結軸SA及び歯車機構GBを通じて伝達機構DTの駆動軸（以下LTC駆動軸という）SBに駆動力を与えられ、所定の順序でタップ選択器TS、転換器RS、切換開閉器DSを動作させ、変圧器の巻線のタップを切換える装置であるが、タップ切換器LTCの切換動作は、電動駆動装置MD内の電動機Ｍの回転速度、すなわち磁極数と、供給電源の周波数によって一定速度に決定されていた。なお、図５において，CVはコンサベータ、PRは保護リレーを示す。
【０００３】
図３及び図４に、従来の負荷時タップ切換器の駆動制御装置と、それによるタップ切換器の切換速度、すなわち電動駆動装置MD内の電動機Ｍの速度制御例を示す。
図３において、Ｗは変圧器の巻線、T1,T2,T3,T4,R1及びR2はこのタップ巻線に設けられたタップ、LTCは負荷時タップ切換器でタップ選択機能を司るタップ選択器TSと、タップ点数増加機能を司る転換器RSと、電流開閉転流機能を司る切換開閉器DSから構成されている。
タップ選択器TSは、前記タップT1,T2,T3,T4にそれぞれ接続された固定接点FC1,FC2,FC3,FC4と可動接点TS1,TS2から成る。
転換器RSは前記タップR1,R2にそれぞれ接続された固定接点RC1,RC2と可動接点RS1から成る。
またＭは電動駆動装置内に設けられ、伝達機構を介して負荷時タップ切換器LTCを駆動する電動機で、Ａは電動機Ｍの電源を制御する電磁接触器である。
Ｂは電動機への供給電源解放後、電動機の惰性回転にブレーキ作用を与えるための電磁接触器である。
【０００４】
図４に、これら負荷時タップ切換器LTC及び電動機Ｍの動作及び切換速度のシーケンスを示すが、図ではタップ選択器TSがタップT3からタップT1へ、転換器RSがタップR2からR1へ切換える場合を例示している。
横軸は時間を、横帯は各接点の閉成区間を、また縦軸は切換速度と駆動軸応力の大きさを示す。
下表に示す順序で動作して、１タップ切換を完了する。
【０００５】
【表１】
【発明が解決しようとする課題】
以上のような、従来の駆動制御装置によるタップ切換器LTCの駆動においては、次の(1)式に示すように電動機Ｍの同期回転速度Nに決定付けられた速度で切換動作するため、次のような問題があった。
N=120 f/p [rpm] -------(1)
但し、N=同期回転速度, p=磁極数, f=電源周波数(Hz)
1) 電動機Ｍの低速度起動回転から一気に同期回転速度(高速度)へ変化する時、電動駆動装置とタップ切換器との間を連結している伝達機構駆動軸の連結用ピン、ピン穴の箇所に、駆動軸系統のガタ(伝達機構の歯車のバックラッシュや締結ピンとピン穴間の隙間によるガタ)に影響されて発生する衝撃力が作用し、繰り返し切換動作でピン穴が摩耗拡大すると共に、連結用ピンの疲労強度も低下し、変圧器の運転中に疲労折損する恐れがあった。
このために、定期的な周期でこれらの部品を新品へ更新しなければならず、品質的な問題のみならず、経済的にも無駄があった。
２) タップ切換器LTCのタップ選択器TS及び転換器RSの接点切換動作は、電動機Ｍの同期回転速度に応じた速度で行われるため、特にこれら接点の可動接点が固定接点へ投入される時、接点同志がぶつかって係合するために駆動軸に極めて大きい衝撃力が作用する。(衝撃力はぶつかる時の速度に大きく影響される。)
このために、繰り返し切換動作による疲労強度低下も考慮し、この衝撃力に充分耐え得る強度を持った高価な材料を適用しなければならなかった。(衝撃力は、接点の静的投入力に比べ３倍程度と大きい。)
また、接点同志が衝突するために、タップ切換器LTCの規定寿命耐用動作回数に到達する前に接点が異常摩耗する不具合もあった。
3) 電動機Ｍ停止時、電動機Ｍ及びタップ切換器LTCの負荷による慣性で、電動機出力軸がスリップし、タップ切換器LTCが途中で停止することを防止するために、電動駆動装置の出力軸部に機械的にブレーキをかけるブレーキ機構と、電動機巻線を電源開放直後に短絡して発電制動によるブレーキをかける電気的制動の両方を採用しているが、停止位置にばらつきを生じ、常に安定した位置へ停止できない難点があった。
【０００７】
この発明は上記のような課題を解決するためにためされたもので、次のことを目的とする。
１）負荷時タップ切換器の動作において、その駆動系に大きな衝撃力が発生しないようにして、伝達機構おける疲労折損や異常摩耗などを少なくし、製品信頼性を向上させる。
２）タップ切換器のタップ選択器及び転換器駆動軸材料等に発生する応力を低減させ、安価な材料の適用を図ると共に、接点の異常摩耗防止も図る。
３）電動機停止時の停止位置を常に安定した位置で行い、タップ切換器の途中停止の不具合をなくする。
【０００８】
【課題を解決するための手段】
上記課題の解決のために、この発明による負荷時タップ切換器の駆動制御装置はタップ選択器及び転換器を有する負荷時タップ切換器を駆動する電動機と、この電動機の電源周波数を制御するインバータと、上記負荷時タップ切換器の動作位置を検出する位置検出器と、この位置検出器の出力に基づいて論理演算を行い、上記負荷時タップ切換器がその動作進度に応じて予め設定された切換速度になるように上記インバータの出力電源周波数を制御する論理演算装置とを備え、上記論理演算装置は、上記電動機の起動及び停止時、または上記タップ選択器及び転換器接点の投入・開放時において、上記負荷時タップ切換器の切換速度が他の状態における切換速度より低速度で、かつ上記負荷時タップ切換器の駆動系に大きな衝撃力を発生しない低速度になるように上記インバータの出力電源周波数を制御するものである。
【００１０】
また、この発明に用いる位置検出器は、ロータリーエンコーダ、タイマー、シーケンサー、機械的カムスイッチのいづれかで構成されている。
【００１１】
さらに、この発明に用いる論理演算装置は、シーケンサプログラムまたはリレーシーケンス制御を行う。
【００１２】
【発明の実施の形態】
以下、この発明の実施の形態を図に基づいて説明する。
実施の形態１．
図１に、この発明によるタップ切換器切換切換速度制御の第１の実施形態を示す。図において、Ｗは変圧器の巻線、R1,R2,T1,T2,T3及びT4は、このタップ巻線に設けられたタップ、LTCは負荷時タップ切換器でタップ選択機能を司るタップ選択器TSとタップ点数増加機能を司る転換器RS、そして電流開閉機能を司る切換開閉器DSとからなる。
タップ選択器TSは前記タップT3,T4にそれぞれ接続された固定接点FC3,FC4と可動接点TS1,TS2とからなる。
転換器RSは前記タップR1,R2にそれぞれ接続された固定接点RC1,RC2と可動接点RS1とからなる。
Ｍは負荷時タップ切換器LTCを駆動する電動機で、Ｃは電動機Ｍの電源を制御するインバータを、DTはタップ切換動作位置を検出するための位置検出装置を、LGはタップ切換器の動作進度に応じてインバータの出力電源周波数を所定の値に制御するための論理演算装置を示す。
【００１３】
次に、タップ切換器LTCの動作進度に応じた切換速度と、この時LTC駆動軸に発生する応力の関係について図２により説明する。この例は、タップをT3からT1へ切換える場合である。
【００１４】
【表２】
上記のように、タップ切換器の動作進度の負荷トルクの大きさに応じて、タップ切換器の切換速度を変化させる。
負荷トルクが印加されない区間、すなわち高速度切換で切換えても衝撃力の作用しない区間は、従来と同様の切換速度で切換え、例えば、電動機の起動運転及び停止時、またはタップ切換器のタップ選択器及び転換器の接点開放,投入時は、それより低速度になるように制御する。
【００１６】
このようにすることにより次のような効果が得られる。
１） 電動駆動装置からタップ切換器間を連結している伝達機構駆動軸の連結用ピン、ピン穴の箇所に発生する疲労折損、異常摩耗をなくし、連結部品一式を定期的に取り替える必要がなく、経済的効果が得られるばかりでなく、変圧器の運転信頼性の向上も図られる。(変圧器停電の必要がなくなる。)
２）タップ切換器の可動接点と固定接点の投入係合時の衝突動作をなくし、タップ選択器及び転換器駆動軸材料に発生する応力を低減させ、安価な材料の適用を図ると共に、接点の異常摩耗防止も図り、製品信頼性を向上させる。
３）電動駆動装置内の機械的ブレーキ機構及び電気的制動装置が不要となり、製品の原価低減が図られ、かつ常に安定した停止位置での停止ができ、タップ切換器のスリップオーバによる途中停止の不適合発生もなくなり、製品品質が向上する。
【００１７】
実施の形態２．
実施形態２では、上記実施形態１におけるタップ切換器LTCの動作位置検出器DTを、電動駆動装置内に取り付け可能なロータリエンコーダ又はタイマー又は既に取り付けられている機械的カムスイッチ又はリレーで構成し、タップ切換器LTCの動作位置を検出できるように、すなわちタップ切換器LTCが動作し始めてからタップ選択器TS及び転換器RSの接点の開放・投入及び切換完了の全ての動作位置が、これらの位置検出器を使用することで判るようにする。
【００１８】
この形態では、タップ切換器LTCの動作進度を、タップ切換器LTCを駆動する電動駆動装置内の動作進度から直接に知り得ることができ、タップ切換器の動作音を検出する音響位置検出方法等に比べ、はるかにタップ切換器の動作位置検出の確実性を期することができる。
【００１９】
実施の形態３．
実施形態３では、更に、タップ切換器LTCの動作位置検出装置DTからの信号入力で、シケンサによるプログラム制御又はリレーシケンス制御で論理演算することにより、タップ切換器LTCの動作開始及び停止時点、 タップ選択器TS及び転換器RSの接点の動作時点を的確に掴み、それらの動作タイミング#時は電動機Ｍの電源周波数をインバータで低周波数として電動機Ｍの回転速度を低速度とし、それ以外の区間は商用周波数による同期回転速度とし、タップ切換器LTCの切換速度をその動作進度に応じて制御するようにする。
【００２０】
この形態では、論理演算をシーケンサプログラム又はリレーシーケンサ制御で行うので、電動機の論理演算による速度制御のみでなく、他の制御の機能例えば、２台以上の変圧器の並列運転制御、タップ位置の遠方駆動制御装置への表示等に幅広く、その制御機能を活用できる。
【００２１】
【発明の効果】
以上のように、この発明による負荷時タップ切換器の駆動制御装置は、タップ選択器及び転換器を有する負荷時タップ切換器を駆動する電動機と、この電動機の電源周波数を制御するインバータと、上記負荷時タップ切換器の動作位置を検出する位置検出器と、この位置検出器の出力に基づいて論理演算を行い、上記負荷時タップ切換器がその動作進度に応じて予め設定された切換速度になるように上記インバータの出力電源周波数を制御する論理演算装置とを備え、上記電動機の起動及び停止時、または上記タップ選択器及び転換器接点の投入・開放時において、上記負荷時タップ切換器の切換速度が他の状態における切換速度より低速度になるように上記インバータの出力電源周波数を制御することにより、タップ切換器の可動接点と固定接点の投入係合時の衝突動作を緩和し、タップ選択器及び転換器駆動軸材料等に発生する応力を低減させ、安価な材料の適用を図ることができると共に、接点の異常摩耗防止も図り、製品信頼性を向上させることができ、また、電動機停止時の停止位置を常に安定した位置で行い、タップ切換器の途中停止の不具合をなくすることもできる。
【図面の簡単な説明】
【図１】この発明の実施の形態１による負荷時タップ切換器の駆動制御装置を示す構成図。
【図２】この発明の実施の形態１による負荷時タップ切換器の切換速度制御の動作シ−ケンスを示す図。
【図３】従来の負荷時タップ切換器の駆動制御装置を示す構成図。
【図４】従来の負荷時タップ切換器の切換速度制御の動作シ−ケンスを示す図。
【図５】従来の負荷時タップ切換器の構成を示す斜視図。
【符号の説明】
Ｗ 変圧器の巻線
R1,R2,T1,T2,T3.T4 タップ
LTC 負荷時タップ切換器
TS タップ選択器
RS 転換器
DS 切換開閉器
FC3,FC4 固定接点
TS1,TS2 可動接点
RC1,RC2 固定接点
RS1 可動接点
Ｍ 電動機
Ｃ インバータ
DT 位置検出装置
LG 論理演算装置[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drive control device for controlling the switching speed of a load tap changer provided in a power transformer or the like.
[0002]
[Prior art]
As shown in FIG. 5, the on-load tap changer LTC attached to the transformer tank TRT includes a tap changer TS, a changer RS, a change-over switch DS, and a transmission mechanism DT, and the transformer is excited. Driven to the drive shaft (hereinafter referred to as the LTC drive shaft) SB of the transmission mechanism DT through the connecting shaft SA and the gear mechanism GB by the electric drive device MD installed on the side wall of the transformer tank TRT in a state of being loaded or loaded Is a device that operates the tap selector TS, converter RS, and switching switch DS in a predetermined order, and switches the taps of the windings of the transformer. The rotational speed of the electric motor M in the driving device MD, that is, the number of magnetic poles, and the frequency of the power supply were determined to be constant. In FIG. 5, CV indicates a conservator and PR indicates a protection relay.
[0003]
3 and 4 show a conventional drive control device for a load tap changer and a switching speed of the tap changer, that is, a speed control example of the electric motor M in the electric drive MD.
In FIG. 3, W is a winding of a transformer, T1, T2, T3, T4, R1 and R2 are taps provided in this tap winding, LTC is a tap selector that performs a tap selection function at a load tap changer. It is composed of TS, a converter RS that controls the tap number increasing function, and a switching switch DS that controls the current switching commutation function.
The tap selector TS includes fixed contacts FC1, FC2, FC3, FC4 and movable contacts TS1, TS2 connected to the taps T1, T2, T3, T4, respectively.
The converter RS includes fixed contacts RC1, RC2 and a movable contact RS1 connected to the taps R1, R2, respectively.
M is an electric motor that is provided in the electric drive device and drives the on-load tap changer LTC via a transmission mechanism, and A is an electromagnetic contactor that controls the power source of the electric motor M.
B is an electromagnetic contactor for applying a braking action to inertial rotation of the electric motor after the supply power to the electric motor is released.
[0004]
FIG. 4 shows the sequence of the operation and switching speed of the on-load tap changer LTC and the motor M. In the figure, the tap selector TS switches from tap T3 to tap T1, and the converter RS switches from tap R2 to R1. Is illustrated.
The horizontal axis indicates time, the horizontal band indicates the closed section of each contact, and the vertical axis indicates the switching speed and the magnitude of the drive shaft stress.
Operate in the order shown in the table below to complete the 1-tap switching.
[0005]
[Table 1]
[Problems to be solved by the invention]
In the drive of the tap changer LTC by the conventional drive control device as described above, the switching operation is performed at the speed determined as the synchronous rotational speed N of the electric motor M as shown in the following equation (1). There was a problem like this.
N = 120 f / p [rpm] ------- (1)
Where N = synchronous rotation speed, p = number of magnetic poles, f = power frequency (Hz)
1) When the motor M changes from the low-speed start rotation to the synchronous rotation speed (high speed) at once, the connection pin and pin hole of the transmission mechanism drive shaft connecting the electric drive device and the tap changer are connected. The impact force generated by the backlash of the drive shaft system (backlash of the gear of the transmission mechanism and backlash due to the gap between the fastening pin and the pin hole) acts on the location, and the pin hole wears and expands by repeated switching operation Further, the fatigue strength of the connecting pin also decreased, and there was a risk of fatigue breakage during operation of the transformer.
For this reason, these parts have to be updated to new ones at regular intervals, which is wasteful not only in terms of quality but also economically.
2) Since the contact switching operation of the tap selector TS and the converter RS of the tap changer LTC is performed at a speed corresponding to the synchronous rotational speed of the motor M, particularly when the movable contact of these contacts is inserted into the fixed contact. Since the contacts collide and engage with each other, a very large impact force acts on the drive shaft. (Impact force is greatly influenced by the speed at the time of collision.)
For this reason, in consideration of a decrease in fatigue strength due to repeated switching operations, an expensive material having a strength sufficient to withstand this impact force must be applied. (The impact force is as large as about three times that of the static throwing force of the contact.)
Further, since the contacts collide with each other, there is a problem that the contact wears abnormally before reaching the specified service life of the tap changer LTC.
3) When the motor M is stopped, the output shaft part of the electric drive unit prevents the motor output shaft from slipping due to the inertia of the load of the motor M and the tap switch LTC, and the tap switch LTC from stopping halfway. Both the brake mechanism that mechanically brakes the motor and the electric brake that applies the brake by power generation braking by short-circuiting the motor winding immediately after the power supply is released are used, but the stop position varies and is always stable. There was a difficulty that could not stop to the position.
[0007]
The present invention has been made in order to solve the above-described problems, and has the following objects.
1) In the operation of the on-load tap changer, a large impact force is not generated in the drive system to reduce fatigue breakage or abnormal wear in the transmission mechanism, thereby improving product reliability.
2) Reduce stress generated in the tap selector of the tap changer and the drive shaft material, etc., and apply inexpensive materials and prevent abnormal wear of the contacts.
3) The stopping position when the motor is stopped is always kept at a stable position, and the trouble of stopping the tap switch halfway is eliminated.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, a drive control device for a load tap changer according to the present invention includes a motor that drives a load tap changer having a tap selector and a converter, and an inverter that controls a power supply frequency of the motor. A position detector for detecting the operating position of the on-load tap changer and a logical operation based on the output of the position detector, and the on-load tap changer is set in advance according to the progress of the operation. A logic operation device that controls the output power supply frequency of the inverter so as to achieve speed, the logic operation device at the time of starting and stopping of the motor, or at the time of turning on and opening the tap selector and converter contact The switching speed of the on-load tap changer is lower than the switching speed in other states, and a large impact force is not generated in the driving system of the on-load tap changer. So that the low speed and controls the output power frequency of the inverter.
[0010]
The position detector used in the present invention is constituted by any of a rotary encoder, a timer, a sequencer, and a mechanical cam switch.
[0011]
Furthermore, the logical operation device used in the present invention performs a sequencer program or relay sequence control.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a first embodiment of tap switch switching speed control according to the present invention. In the figure, W is a winding of a transformer, R1, R2, T1, T2, T3 and T4 are taps provided on the tap winding, and LTC is a tap selector that performs a tap selection function at a load tap changer. It consists of TS, the converter RS that controls the tap increase function, and the switching switch DS that controls the current switching function.
The tap selector TS includes fixed contacts FC3 and FC4 and movable contacts TS1 and TS2 connected to the taps T3 and T4, respectively.
The converter RS includes fixed contacts RC1 and RC2 and a movable contact RS1 connected to the taps R1 and R2, respectively.
M is an electric motor that drives the on-load tap changer LTC, C is an inverter that controls the power source of the electric motor M, DT is a position detection device for detecting the tap change operation position, and LG is an operation progress of the tap changer. 2 shows a logical operation device for controlling the output power supply frequency of the inverter to a predetermined value in accordance with FIG.
[0013]
Next, the relationship between the switching speed according to the operation progress of the tap changer LTC and the stress generated on the LTC drive shaft at this time will be described with reference to FIG. In this example, the tap is switched from T3 to T1.
[0014]
[Table 2]
As described above, the switching speed of the tap changer is changed according to the magnitude of the load torque of the operation progress of the tap changer.
Sections where load torque is not applied, that is, sections where impact force does not act even when switching at high speed switching, are switched at the same switching speed as before, for example, when starting and stopping the motor, or a tap selector of a tap switch And when the contact of the converter is opened and turned on, the speed is controlled to be lower.
[0016]
By doing so, the following effects can be obtained.
1) Fatigue breakage and abnormal wear occurring at the pin and pin hole of the transmission mechanism drive shaft connecting the electric drive unit to the tap changer are eliminated, and there is no need to replace the set of connected parts regularly. This not only provides an economic effect, but also improves the operational reliability of the transformer. (No need for transformer power outage)
2) Eliminates the collision operation when the movable contact and fixed contact of the tap changer are engaged, reduces the stress generated in the tap selector and the converter drive shaft material, and applies an inexpensive material. Prevents abnormal wear and improves product reliability.
3) The mechanical brake mechanism and the electric braking device in the electric drive unit are not required, the cost of the product is reduced, and the stop can always be performed at a stable stop position. Non-conformity will not occur and product quality will be improved.
[0017]
In the second embodiment, the operation position detector DT of the tap changer LTC in the first embodiment is configured by a rotary encoder or timer that can be mounted in the electric drive device or a mechanical cam switch or relay that is already mounted, In order to detect the operation position of the tap changer LTC, that is, all the operation positions of opening / closing of the contact of the tap selector TS and the converter RS and the completion of the change after the tap changer LTC starts to operate are these positions. Make it clear by using a detector.
[0018]
In this embodiment, the operation progress of the tap switch LTC can be directly known from the operation progress in the electric drive device that drives the tap switch LTC, and the acoustic position detection method for detecting the operation sound of the tap switch, etc. Compared to the above, the reliability of the detection of the operation position of the tap changer can be expected.
[0019]
Embodiment 3 FIG.
In the third embodiment, further, logical operation is performed by program control or relay sequence control by a sequencer with a signal input from the operation position detection device DT of the tap changer LTC, so that the tap changer LTC starts and stops operation, tap selection. Accurately grasp the operation time of the contact points of the converter TS and the converter RS, and at those operation timings #, the power source frequency of the motor M is set to a low frequency with an inverter, and the rotational speed of the motor M is set to a low speed, and the other sections are commercial The switching speed of the tap changer LTC is controlled in accordance with the operation progress, with the synchronous rotation speed depending on the frequency.
[0020]
In this mode, the logic operation is performed by a sequencer program or relay sequencer control. Therefore, not only the speed control by the logic operation of the motor, but also other control functions such as parallel operation control of two or more transformers, distant tap positions Widely used for display on drive control devices, and its control functions can be used.
[0021]
【The invention's effect】
As described above, the drive control device for a load tap changer according to the present invention includes a motor that drives a load tap changer having a tap selector and a converter, an inverter that controls the power supply frequency of the motor, and the above A position detector that detects the operating position of the on-load tap changer and a logical operation based on the output of the position detector, and the on-load tap changer has a switching speed set in advance according to the operation progress. And a logic operation device for controlling the output power frequency of the inverter, and when the motor is started and stopped, or when the tap selector and the converter contact are turned on / off, the load tap changer By controlling the output power frequency of the inverter so that the switching speed is lower than the switching speed in other states, the tap contactor and the movable contact can be fixed. Reduces the stress generated in the tap selector and converter drive shaft material, etc., by reducing the collision operation when the contacts are engaged, making it possible to apply inexpensive materials and prevent abnormal wear on the contacts. The product reliability can be improved, and the stop position when the motor is stopped is always performed at a stable position, so that the trouble of stopping the tap changer can be eliminated.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a drive control device for a load tap changer according to
FIG. 2 is a diagram showing an operation sequence of switching speed control of the on-load tap changer according to the first embodiment of the present invention.
FIG. 3 is a configuration diagram illustrating a drive control device for a conventional on-load tap changer.
FIG. 4 is a diagram showing an operation sequence for switching speed control of a conventional on-load tap changer.
FIG. 5 is a perspective view showing a configuration of a conventional on-load tap changer.
[Explanation of symbols]
W Transformer winding
R1, R2, T1, T2, T3.T4 tap
LTC load tap changer
TS tap selector
RS converter
DS selector switch
FC3, FC4 fixed contact
TS1, TS2 Movable contact
RC1, RC2 fixed contact
RS1 Movable contact M Motor C Inverter
DT position detector
LG logic unit
Claims (3)
上記論理演算装置は、上記電動機の起動及び停止時、または上記タップ選択器及び転換器接点の投入・開放時において、上記負荷時タップ切換器の切換速度が他の状態における切換速度より低速度で、かつ上記負荷時タップ切換器の駆動系に大きな衝撃力を発生しない低速度になるように上記インバータの出力電源周波数を制御することを特徴とする負荷時タップ切換器の駆動制御装置。An electric motor for driving an on-load tap changer having a tap selector and a converter, an inverter for controlling a power frequency of the electric motor, a position detector for detecting an operating position of the on-load tap changer, and the position detection A logic operation unit that performs a logical operation based on the output of the device, and controls the output power frequency of the inverter so that the on-load tap changer has a switching speed set in advance according to its operation progress ,
The logical arithmetic unit is configured such that when the motor is started and stopped, or when the tap selector and the converter contact are turned on / off, the switching speed of the on-load tap changer is lower than the switching speed in other states. And the drive control apparatus of the on-load tap changer characterized by controlling the output power supply frequency of the said inverter so that it may become the low speed which does not generate | occur | produce a big impact force in the drive system of the said on-load tap changer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001204237A JP4592223B2 (en) | 2001-07-05 | 2001-07-05 | Drive control device for tap changer during load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001204237A JP4592223B2 (en) | 2001-07-05 | 2001-07-05 | Drive control device for tap changer during load |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003015747A JP2003015747A (en) | 2003-01-17 |
| JP4592223B2 true JP4592223B2 (en) | 2010-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2001204237A Expired - Fee Related JP4592223B2 (en) | 2001-07-05 | 2001-07-05 | Drive control device for tap changer during load |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101507099B (en) | 2006-08-25 | 2012-07-04 | Abb研究有限公司 | A drive system for a tap changer |
| CN103578042B (en) * | 2013-10-14 | 2016-08-10 | 国家电网公司 | A kind of Hieratical assessment method for degree of reliability of power transformer |
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