EP2638553B1 - Tap changer - Google Patents

Tap changer Download PDF

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Publication number
EP2638553B1
EP2638553B1 EP11776703.8A EP11776703A EP2638553B1 EP 2638553 B1 EP2638553 B1 EP 2638553B1 EP 11776703 A EP11776703 A EP 11776703A EP 2638553 B1 EP2638553 B1 EP 2638553B1
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EP
European Patent Office
Prior art keywords
load
tap
msv2
msv1
winding
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.)
Not-in-force
Application number
EP11776703.8A
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German (de)
French (fr)
Other versions
EP2638553A1 (en
Inventor
Christian Hammer
Silke Wrede
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.)
Maschinenfabrik Reinhausen GmbH
Scheubeck GmbH and Co
Original Assignee
Maschinenfabrik Reinhausen GmbH
Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
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.)
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Application filed by Maschinenfabrik Reinhausen GmbH, Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical Maschinenfabrik Reinhausen GmbH
Publication of EP2638553A1 publication Critical patent/EP2638553A1/en
Application granted granted Critical
Publication of EP2638553B1 publication Critical patent/EP2638553B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H01H9/0038—Tap change devices making use of vacuum switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current

Definitions

  • the invention relates to a tap changer for uninterrupted switching between winding taps of a tapped transformer according to the preamble of the first claim.
  • a tap changer which has a total of four vacuum interrupters per phase.
  • a vacuum interrupter as the main contact and in each case a further vacuum interrupter, are provided in series connection with a transfer resistor, as a resistance contact.
  • the main contact of the disconnecting side is first opened, then closes the resistor contact the receiving side, so that between the two stages n and n + 1 through the switching resistors limited compensating current flows.
  • the previously closed resistance contact has opened the disconnecting side, then closes the main contact of the receiving side, so that the entire load current from the new winding tapping n + 1 leads to the load dissipation; the switching is completed.
  • the vacuum interrupter of the switched load branch carries the continuous current in steady state operation.
  • the object of the invention is therefore to provide a tap changer of the type mentioned above, which allows the management of high continuous currents without additional mechanical permanent contacts.
  • This object is achieved by a tap changer having the features of the first claim.
  • the subclaims relate to advantageous developments of the invention.
  • the general inventive idea is to divide the continuous current to all acting as the main contact switching elements of both load branches and next to the at least one switching element in the current leading load branch also - at least one switching element in the non-load current - already existing, but in the prior art functionless Load branch in the continuous current to include.
  • the object of the invention is achieved without more switching elements or larger sized switching elements would be required.
  • a first load branch is provided in which a vacuum interrupter MSV1 acting as a main contact and, in parallel thereto, a crossover resistor R1 and a vacuum interrupter TTV1 acting as a resistance contact are located.
  • the second load branch has, quite analogously, a vacuum interrupter MSV2 and, in parallel with this, another reversing resistor R2 and a vacuum interrupter TTV2.
  • a first mechanical change-over contact MTF1 is provided in the first load branch, through which the side of the vacuum interrupter not connected to the load discharge line L
  • a second mechanical changeover contact MTF2 is furthermore provided in the second load branch, by means of which the side of the vacuum interrupter MSV2 not connected to the load lead L can also be selectively connected to the previous tap n of the tap winding or to the new winding tap n + 1.
  • mechanical contacts constructed identically and / or combined into a single module.
  • the invention is not limited to the use of vacuum interrupters as switching elements.
  • tap changer with mechanical contacts or semiconductor switches as switching elements are possible; the advantages of the invention apply to such tap changers as well.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Description

Die Erfindung betrifft einen Stufenschalter zur unterbrechungslosen Umschaltung zwischen Wicklungsanzapfungen eines Stufentransformators gemäß dem Oberbegriff des ersten Patentanspruches.The invention relates to a tap changer for uninterrupted switching between winding taps of a tapped transformer according to the preamble of the first claim.

Aus der DE 20 21 575 ist ein Stufenschalter bekannt, der insgesamt vier Vakuumschaltröhren pro Phase aufweist. In jedem der beiden Lastzweige sind jeweils eine Vakuumschaltröhre als Hauptkontakt und jeweils eine weitere Vakuumschaltröhre, in Reihenschaltung mit einem Überschaltwiderstand, als Widerstandskontakt vorgesehen. Bei einer unterbrechungslosen Lastumschaltung von der bisherigen Wicklungsanzapfung n auf eine neue, vorgewählte Wicklungsanzapfung n+1 wird zunächst der Hauptkontakt der abschaltenden Seite geöffnet, darauf schließt der Widerstandskontakt der übernehmenden Seite, so dass zwischen den beiden Stufen n und n+1 ein durch die Überschaltwiderstände begrenzter Ausgleichsstrom fließt. Nachdem der bisher geschlossene Widerstandskontakt der abschaltenden Seite geöffnet hat, schließt dann der Hauptkontakt der übernehmenden Seite, so dass der gesamte Laststrom von der neuen Wicklungsanzapfung n+1 zur Lastableitung führt; die Umschaltung ist beendet.From the DE 20 21 575 is known a tap changer, which has a total of four vacuum interrupters per phase. In each of the two load branches in each case a vacuum interrupter as the main contact and in each case a further vacuum interrupter, are provided in series connection with a transfer resistor, as a resistance contact. In an uninterrupted load switching from the previous winding tap n to a new, preselected winding tap n + 1, the main contact of the disconnecting side is first opened, then closes the resistor contact the receiving side, so that between the two stages n and n + 1 through the switching resistors limited compensating current flows. After the previously closed resistance contact has opened the disconnecting side, then closes the main contact of the receiving side, so that the entire load current from the new winding tapping n + 1 leads to the load dissipation; the switching is completed.

Bei diesem bekannten Stufenschalter führt die Vakuumschaltröhre des eingeschalteten Lastzweiges den Dauerstrom im stationären Betrieb.In this known tap changer, the vacuum interrupter of the switched load branch carries the continuous current in steady state operation.

Derartige Stufenschalter mit zwei Lastzweigen mit jeweils zwei Vakuumschaltröhren haben sich in der Praxis bewährt. Dennoch gibt es Anwendungsfälle, bei denen ein derart hoher Dauerstrom auftreten kann, dass die Führung durch eine Vakuumschaltröhre im stationären Betrieb problematisch ist.Such tap changer with two load branches, each with two vacuum interrupters have been proven in practice. Nevertheless, there are applications in which such a high continuous current can occur that the leadership is problematic by a vacuum interrupter in steady-state operation.

Es sind auch ähnliche Schaltungen mit ebenfalls vier Vakuumschaltröhren pro Phase bekannt, bei denen jedoch in jedem Lastkreis zwei Vakuumschaltröhren in Reihe geschaltet sind und zu einer dieser Vakuumschaltröhren ein Überschaltwiderstand parallel geschaltet ist. Hierbei führen die beiden in Reihe geschalteten Vakuumschaltröhren den Dauerstrom, was ebenfalls bei sehr hohen Dauerströmen Probleme bereiten kann.There are also similar circuits with four vacuum interrupters per phase are known in which, however, in each load circuit two vacuum interrupters are connected in series and connected to one of these vacuum interrupters, a reverse resistor in parallel. Here, the two series-connected vacuum interrupters lead the continuous current, which can also cause problems at very high continuous currents.

Prinzipiell ist es in solchen Fällen für die verschiedensten Schaltungen bereits bekannt, parallel zu beiden Lastzweigen mechanische Dauerkontakte vorzusehen, die nach der Lastumschaltung die Führung des Dauerstroms im stationären Betrieb übernehmen und die Vakuumschaltröhren damit entlasten. Der Dauerkontakt der bisher stromführenden Seite öffnet dabei vor Beginn der eigentlichen Lastumschaltung; der Dauerkontakt der den Strom übernehmenden Seite schließt nach Abschluss der eigentlichen Lastumschaltung.In principle, it is already known in such cases for a variety of circuits to provide parallel to two load branches mechanical permanent contacts, take over the load switching the leadership of the continuous current in steady operation and relieve the vacuum interrupters so. The permanent contact of the current-carrying side opens before the start of the actual load switching; the permanent contact of the current-receiving side closes after completion of the actual load switching.

Solche mechanischen Dauerkontakte erhöhen allerdings den Platzbedarf des Stufenschalters, die Komplexität der Konstruktion und verlängern zudem die Schaltsequenz, d. h. die Zahl der nacheinander zu betätigenden Kontakte bei einer Lastumschaltung.
Dieses Problem ist nicht auf Stufenschalter mit Vakuumschaltröhren als Schaltelementen begrenzt. Gleichermaßen ergibt sich dieser Nachteil auch bei Stufenschaltern mit mechanischen Kontakten als Schaltelementen oder mit Halbleiter-Schaltern.However, such mechanical permanent contacts increase the footprint of the tap changer, the complexity of the design and also extend the switching sequence, ie the number of contacts to be actuated successively in a load switching.
This problem is not limited to tap changers with vacuum interrupters as switching elements. Similarly, this disadvantage also results in tap changers with mechanical contacts as switching elements or with semiconductor switches.

Ferner offenbart das Dokument DE 23 48 091 B1 einen Stufenschalter gemäß dem Oberbegriff des Anspruchs 1.Further, the document discloses DE 23 48 091 B1 a tap changer according to the preamble of claim 1.

Aufgabe der Erfindung ist es demnach, einen Stufenschalter der eingangs genannten Art anzugeben, der die Führung hoher Dauerströme auch ohne zusätzliche mechanische Dauerkontakte gestattet. Diese Aufgabe wird durch einen Stufenschalter mit den Merkmalen des ersten Patentanspruches gelöst. Die Unteransprüche betreffen vorteilhafte Weiterbildungen der Erfindung. Die allgemeine erfinderische Idee besteht darin, den Dauerstrom auf alle als Hauptkontakt wirkende Schaltelemente beider Lastzweige aufzuteilen und neben dem mindestens einem Schaltelement im den Strom führenden Lastzweig auch das - ohnehin vorhandene, aber beim Stand der Technik funktionslose - mindestens eine Schaltelement im nicht den Laststrom führenden Lastzweig in die Dauerstromführung mit einzubeziehen. Damit wird die Aufgabe der Erfindung gelöst, ohne dass mehr Schaltelemente oder größer dimensionierte Schaltelemente erforderlich wären.The object of the invention is therefore to provide a tap changer of the type mentioned above, which allows the management of high continuous currents without additional mechanical permanent contacts. This object is achieved by a tap changer having the features of the first claim. The subclaims relate to advantageous developments of the invention. The general inventive idea is to divide the continuous current to all acting as the main contact switching elements of both load branches and next to the at least one switching element in the current leading load branch also - at least one switching element in the non-load current - already existing, but in the prior art functionless Load branch in the continuous current to include. Thus, the object of the invention is achieved without more switching elements or larger sized switching elements would be required.

Die Erfindung soll nachfolgend beispielhaft an Hand von Zeichnungen noch näher erläutert werden. Es zeigen:

Figur 1
einen erfindungsgemäßen Stufenschalter, hier mit Vakuumschaltröhren als Schaltelementen, im stationären Zustand mit Beschaltung einer Wicklungsanzapfung n der Stufenwicklung des Stufentransformators
Figur 1a... Figur 8
verschiedene Schritte während einer Lastumschaltung auf die neue Wicklungsanzapfung n+1.
The invention will be explained in more detail by way of example with reference to drawings. Show it:
FIG. 1
a tap changer according to the invention, here with vacuum interrupters as switching elements, in the stationary state with wiring of a winding tap n of the tap winding of the tapped transformer
FIG. 1 a ... FIG. 8
different steps during a load switching to the new winding tap n + 1.

Beim erfindungsgemäßen Stufenschalter ist ein erster Lastzweig vorgesehen, in dem sich eine als Hauptkontakt wirkende Vakuumschaltröhre MSV1 sowie parallel dazu ein Überschaltwiderstand R1 sowie eine als Widerstandskontakt wirkende Vakuumschaltröhre TTV1 befinden. Der zweite Lastzweig besitzt ganz analog eine Vakuumschaltröhre MSV2 sowie parallel dazu einen weiteren Überschaltwiderstand R2 und eine Vakuumschaltröhre TTV2. Bis hierhin entspricht die Schaltung dem Stand der Technik.
Erfindungsgemäß ist im ersten Lastzweig ein erster mechanischer Umschaltkontakt MTF1 vorgesehen, durch den die nicht mit der Lastableitung L verbundene Seite der VakuumschaltröhreIn the tap changer according to the invention, a first load branch is provided in which a vacuum interrupter MSV1 acting as a main contact and, in parallel thereto, a crossover resistor R1 and a vacuum interrupter TTV1 acting as a resistance contact are located. The second load branch has, quite analogously, a vacuum interrupter MSV2 and, in parallel with this, another reversing resistor R2 and a vacuum interrupter TTV2. Up to this point, the circuit corresponds to the prior art.
According to the invention, a first mechanical change-over contact MTF1 is provided in the first load branch, through which the side of the vacuum interrupter not connected to the load discharge line L

MSV1 wahlweise mit der bisherigen Anzapfung n der Stufenwicklung oder auch der neuen Wicklungsanzapfung n+1 verbindbar ist.
Erfindungsgemäß ist weiterhin im zweiten Lastzweig ein zweiter mechanischer Umschaltkontakt MTF2 vorgesehen, durch den die nicht mit der Lastableitung L verbundene Seite der Vakuumschaltröhre MSV2 ebenfalls wahlweise mit der bisherigen Anzapfung n der Stufenwicklung oder auch der neuen Wicklungsanzapfung n+1 verbindbar ist.MSV1 is selectively connectable to the previous tap n the tap winding or the new winding tap n + 1.
According to the invention, a second mechanical changeover contact MTF2 is furthermore provided in the second load branch, by means of which the side of the vacuum interrupter MSV2 not connected to the load lead L can also be selectively connected to the previous tap n of the tap winding or to the new winding tap n + 1.

Im in Figur 1 dargestellten Fall würde nach dem Stand der Technik der Laststrom von der Wicklungsanzapfung n über die Vakuumschaltröhre MSV1 zur Lastableitung führen. Die Vakuumschaltröhre MSV1 würde allein den Dauerstrom führen. Durch die Schaltung der erfindungsgemäß in die beiden Lastzweige eingefügten mechanischen Umschaltkontakte MTF1 und MTF2 hingegen wird der Laststrom IL, d.h. der Dauerstrom im stationären Betrieb, auf die Vakuumschaltröhren MSV1 und MSV2 aufgeteilt; jede dieser beiden Vakuumschaltröhren muss also nur noch den halben Laststrom ½ IL als Dauerstrom führen. Die Vorteile liegen auf der Hand: Schonender Betrieb für die Vakuumschaltröhren, weniger Platzbedarf, Entfall mechanischer Dauerkontakte.Im in FIG. 1 In the case illustrated, according to the prior art, the load current from the winding tappet n would lead to the discharge of the load via the vacuum interrupter MSV1. The vacuum interrupter MSV1 alone would carry the continuous current. On the other hand, by switching the mechanical changeover contacts MTF1 and MTF2 inserted into the two load branches according to the invention, the load current IL, ie the steady current in steady state operation, is distributed to the vacuum interrupters MSV1 and MSV2; each of these two vacuum interrupters must therefore only carry half the load current ½ IL as a continuous current. The advantages are obvious: Gentle operation for the vacuum interrupters, less space requirement, elimination of mechanical permanent contacts.

Nachfolgend soll an Hand der weiteren Figuren eine vollständige Umschaltsequenz des erfindungsgemäßen Stufenschalters von der Wicklungsanzapfung n auf die Wicklungsanzapfung n+1 gezeigt werden. Ust bezeichnet dabei die Stufenspannung zwischen den beiden Wicklungsanzapfungen. Die den Laststrom jeweils führenden Pfade sind dick dargestellt.

  • Figur 1a: Die Anzapfung n ist noch stationär geschaltet, wie bereits an Hand von Figur 1a erläutert.
  • Die Vakuumschaltröhren TTV2 und MSV2 öffnen; die Umschaltung beginnt mit diesem Schritt.
  • Figur 2: Die Vakuumschaltröhren TTV2 und MSV2 sind geöffnet, jetzt schaltet der mechanische Kontakt MTF2. Der Laststrom IL fließt jetzt ausschließlich über den linken Lastzweig.
  • Figur 3: Die Vakuumschaltröhre MSV1 hat geöffnet, der Laststrom kommutiert auf den Widerstandszweig, bestehend aus der Reihenschaltung der Vakuumröhre TTV1 und dem Widerstand R1.
  • Figur 4: Die Vakuumschaltröhre TTV2 im rechten Widerstandszweig ist jetzt geschlossen; es fließt ein Kreisstrom Ic.
  • Figur 5: Die Vakuumschaltröhre TTV1 ist jetzt geöffnet, der rechte Widerstandszweig, bestehend aus der Reihenschaltung der Vakuumschaltröhre TTV2 und dem Widerstand R2, übernimmt den Laststrom vollständig.
  • Figur 6: Die Vakuumschaltröhre MSV2 schließt und übernimmt die Stromführung, gleichzeitig wird der mechanische Umschaltkontakt MTF1 betätigt.
  • Figur 7: Die Vakuumschaltröhren und MSV1 und TTV1 des linken Lastzweiges schließen.
  • Figur 8: Der neue stationäre Endzustand ist erreicht; die Umschaltung ist beendet. Der Laststrom IL von der Wicklungsanzapfung n+1 verteilt sich über die beiden Vakuumschaltröhren MSV1 und MSV2, die jeweils den halben Laststrom ½ IL führen, hin zur Lastableitung L.
A complete switching sequence of the tap changer according to the invention from the winding tap n to the winding tap n + 1 will be shown below with reference to the further figures. U st denotes the step voltage between the two winding taps. The paths leading the load current are shown thick.
  • FIG. 1a : The tapping n is still stationary, as already on hand of FIG. 1a explained.
  • Open the vacuum interrupters TTV2 and MSV2; switching starts with this step.
  • FIG. 2 : The vacuum interrupters TTV2 and MSV2 are open, now the mechanical contact MTF2 switches. The load current IL now flows exclusively via the left load branch.
  • FIG. 3 : The vacuum interrupter MSV1 has opened, the load current commutes to the resistance branch, consisting of the series connection of the vacuum tube TTV1 and the resistor R1.
  • FIG. 4 : The vacuum interrupter TTV2 in the right resistance branch is now closed; a circulating current Ic flows.
  • FIG. 5 : The vacuum interrupter TTV1 is now open, the right resistance branch, consisting of the series connection of the vacuum interrupter TTV2 and the resistor R2, completely takes over the load current.
  • FIG. 6 : The vacuum interrupter MSV2 closes and takes over the power supply, at the same time the mechanical changeover contact MTF1 is actuated.
  • FIG. 7 Close the vacuum interrupters and MSV1 and TTV1 of the left load branch.
  • FIG. 8 : The new stationary final state is reached; the switching is completed. The load current IL from the winding tapping n + 1 is distributed via the two vacuum interrupters MSV1 and MSV2, each of which carries half the load current ½ IL, to the load derivation L.

Besonders vorteilhaft sind die mechanischen Kontakte (MTF1, MTF2) identisch aufgebaut und/oder zu einer einzigen Baugruppe zusammengefasst.Particularly advantageous are the mechanical contacts (MTF1, MTF2) constructed identically and / or combined into a single module.

Die Erfindung ist nicht auf die Benutzung von Vakuumschaltröhren als Schaltelemente beschränkt.
Im Rahmen der Erfindung sind auch Stufenschalter mit mechanischen Kontakten oder Halbleiterschaltern als Schaltelementen möglich; die Vorteile der Erfindung gelten für derartige Stufenschalter ebenso.The invention is not limited to the use of vacuum interrupters as switching elements.
In the context of the invention, tap changer with mechanical contacts or semiconductor switches as switching elements are possible; the advantages of the invention apply to such tap changers as well.

Claims (6)

  1. Tap changer for uninterrupted changeover between two winding taps (n, n+1) of a tapped transformer,
    wherein two load branches are provided in such a form that one load branch is electrically connected with the first winding tap (n) and the other load branch with the second winding tap (n+1),
    wherein the first load branch has at least one first switching element (MSV1) acting as a main contact and parallel thereto a series connection of a switch-over resistance (R1) as well as a second switching element (TTV1) acting as a resistance contact,
    wherein the second load branch has at least one third switching element (MSV2) acting as a main contact and parallel thereto a series connection of a further switch-over resistance (R2) as well as a fourth switching element (TTV2) acting as a resistance contact and wherein the first and second load branches are connected each at one side by a common load diverter (L),
    characterised in that
    additionally provided in the first load branch is a first mechanical switch-over contact (MTF1) by which the side, which is not connected with the load diverter (L), of the parallel connection of the first load branch (MSV1, R1, TTV1) is selectably connectible with the first winding tap (n) or the second winding tap (n+1) and
    additionally provided in the second load branch is a second mechanical switch-over contact (MTF2) by which the side, which is not connected with the load diverter (L), of the parallel connection of the second load branch (MSV2, R2, TTV2) is similarly selectably connectible with the first winding tap (n) or the second winding tap (n+1).
  2. Tap changer according to claim 1, characterised in that the mechanical contacts (MTF1, MTF2) are of identical construction.
  3. Tap changer according to claim 1 or 2, characterised in that the mechanical contacts (MTF1, MTF2) are combined to form a subassembly.
  4. Tap changer according to claim 1, 2 or 3, characterised in that vacuum switching tubes are used as the switching elements (MSV1, MSV2).
  5. Tap changer according to claim 1, 2 or 3, characterised in that mechanical contacts are used as the switching elements (MSV1, MSV2).
  6. Tap changer according to claim 1, 2 or 3, characterised in that electrical semiconductor switches, particularly thyristors or IGBTs, are used as the switching elements (MSV1, MSV2).
EP11776703.8A 2010-11-09 2011-10-22 Tap changer Not-in-force EP2638553B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010050882A DE102010050882A1 (en) 2010-11-09 2010-11-09 step switch
PCT/EP2011/005337 WO2012062408A1 (en) 2010-11-09 2011-10-22 On-load tap changer

Publications (2)

Publication Number Publication Date
EP2638553A1 EP2638553A1 (en) 2013-09-18
EP2638553B1 true EP2638553B1 (en) 2015-09-30

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Application Number Title Priority Date Filing Date
EP11776703.8A Not-in-force EP2638553B1 (en) 2010-11-09 2011-10-22 Tap changer

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EP (1) EP2638553B1 (en)
CN (1) CN103189948B (en)
DE (1) DE102010050882A1 (en)
HK (1) HK1186290A1 (en)
WO (1) WO2012062408A1 (en)

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Publication number Priority date Publication date Assignee Title
FR3004284B1 (en) 2013-04-08 2015-04-03 Schneider Electric Ind Sas TRANSFORMER WITH MEANS FOR ADJUSTING THE LOAD TRANSFORMATION RATIO
DE102015106178A1 (en) * 2015-04-22 2016-10-27 Maschinenfabrik Reinhausen Gmbh OLTC
WO2022001362A1 (en) * 2020-06-29 2022-01-06 南方电网科学研究院有限责任公司 Passive triggered-power electronic tap-changer device and contact device
CN111899999B (en) * 2020-06-29 2021-09-03 南方电网科学研究院有限责任公司 Power electronic tap changer and distribution transformer
CN112670066B (en) * 2020-11-18 2023-03-21 中国电力科学研究院有限公司 Transition circuit device and method for alternately bearing symmetrical vacuum bubbles
CN116721848B (en) * 2023-06-05 2024-04-02 中国南方电网有限责任公司超高压输电公司广州局 On-load tap changer and control method thereof

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US3467800A (en) * 1967-03-21 1969-09-16 Gen Electric Reversible cam actuating mechanism for electric switches
DE2125763A1 (en) * 1971-05-25 1972-12-07 Transformatoren Union Ag
DE2228445A1 (en) * 1972-06-10 1973-12-20 Transformatoren Union Ag DRIVE FOR LOAD SWITCH
DE2348091C2 (en) * 1973-09-25 1975-08-28 Maschinenfabrik Reinhausen Gebrueder Scheubeck Kg, 8400 Regensburg Three-phase cylindrical diverter switch for step switches of step transformers
EP0009287A1 (en) * 1978-09-18 1980-04-02 ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE CHARLEROI (ACEC) Société Anonyme Electrical apparatus comprising a series of voltage taps and a tap selector and/or a circuit breaker
JPS5792813A (en) * 1980-12-01 1982-06-09 Toshiba Corp On-load tap changer
US4384247A (en) * 1981-05-08 1983-05-17 Trw Inc. Under-load switching device particularly adapted for voltage regulation and balance
JP2008505479A (en) * 2004-06-30 2008-02-21 アーベーベー・リサーチ・リミテッド Switching switch, method for operating such switch and use of such switch
DE102004046926B3 (en) * 2004-09-28 2006-01-19 Maschinenfabrik Reinhausen Gmbh Device for regulating the electrical voltage

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WO2012062408A1 (en) 2012-05-18
HK1186290A1 (en) 2014-03-07
CN103189948A (en) 2013-07-03
DE102010050882A1 (en) 2012-05-10
CN103189948B (en) 2016-10-12
EP2638553A1 (en) 2013-09-18

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