EP2460168B1 - Arrangement comprising a stepping switch and a control transformer - Google Patents

Arrangement comprising a stepping switch and a control transformer Download PDF

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Publication number
EP2460168B1
EP2460168B1 EP10720133.7A EP10720133A EP2460168B1 EP 2460168 B1 EP2460168 B1 EP 2460168B1 EP 10720133 A EP10720133 A EP 10720133A EP 2460168 B1 EP2460168 B1 EP 2460168B1
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EP
European Patent Office
Prior art keywords
transformer
tap changer
contact system
mechanical contact
arrangement
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
EP10720133.7A
Other languages
German (de)
French (fr)
Other versions
EP2460168A1 (en
Inventor
Oliver Brueckl
Dieter Dohnal
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.)
Filing date
Publication date
Application filed by Maschinenfabrik Reinhausen GmbH, Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical Maschinenfabrik Reinhausen GmbH
Publication of EP2460168A1 publication Critical patent/EP2460168A1/en
Application granted granted Critical
Publication of EP2460168B1 publication Critical patent/EP2460168B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • 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
    • 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
    • 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
    • H01H9/0044—Casings; Mountings; Disposition in transformer housing

Definitions

  • the invention relates to an arrangement with a tap changer and a control transformer, in particular an electronic tap changer, in particular on a distribution transformer.
  • Tap changers are used for uninterrupted switching between winding taps of a control transformer. They have been state of the art for many years and known in numerous embodiments with mechanical contacts or vacuum interrupters or semiconductor switches as switching elements for load switching.
  • the tap-changer When so-called. "Compartment-type" (switch-on switch), the tap-changer is arranged on the side of the transformer tank and communicates with the control winding via feed-throughs.
  • the laterally mounted tap changer has a separate oil volume.
  • a tap changer with at least one switching resistor and semiconductor switching elements known wherein only the tap selector is housed in the oil-filled transformer tank, while the actual load switch with thyristors as semiconductor switching elements in a laterally mounted separate housing is in the air.
  • the switching resistance in turn is arranged in a further lateral separate housing part in air.
  • a disadvantage of the known arrangements with a tap changer and a control transformer, wherein the tap changer is arranged in the transformer or on the side of the transformer, is a required correspondingly wider or longer transformer design.
  • a correspondingly wider or longer transformer design which includes the space for the tap changer, would lead to correspondingly larger compact stations.
  • this is undesirable because larger compact stations are correspondingly expensive and above all claim more space.
  • the object of the invention is therefore to provide an arrangement with a tap changer and a control transformer, which does not specify the predetermined by the transformer base increased and overall an efficient, space-saving and cost-effective integration of the tap changer with a control transformer allowed.
  • the invention is based on the general idea to provide the tap changer above the iron yoke of the control transformer and thus a total of above or on the control transformer. This is particularly advantageous in compact stations, which usually provide up enough space. Especially with such compact stations the smallest possible space is desired to keep the necessary land acquisition for setting up as low as possible. In contrast, the height of the compact stations installed on the corresponding area does not affect these costs.
  • the mechanical contact system of the tap changer is below the transformer cover and thus within the transformer, the actual diverter switch, however, above the transformer cover and thus outside of the transformer.
  • the complete tap d is located. H. Both the mechanical contact system and the diverter switch, below the transformer cover and thus within the transformer.
  • the diverter switch as a power electronic diverter switch with electronic switching means such as thyristors or IGBTs.
  • a separate lid is provided, so that the power electronic diverter switch is easily accessible separately from above.
  • FIG. 1 is a schematic representation of a boiler 1 of a control transformer shown in the interior of which windings 2 and at least one iron yoke 3 are located. Above the boiler 1 is completed by a transformer cover 4. Usually, the complete boiler 1 is filled with oil. Above the transformer cover 4, the MS bushing 5 and the NS bushing 6 are still indicated. The connection to the primary or secondary side of the winding 2 inside the transformer and the electrical connections from the control winding to the tap changer are not shown. Above the iron yoke 3, a tap changer is arranged, which has an electronic diverter switch 7 and below a mechanical contact system 8, the selector. Diverter switch 7 and contact system 8 are hermetically separated by a horizontal lead-through plate 9.
  • the electronic diverter switch 7 is located above the transformer cover 4, while the mechanical contact system 8 is located within the transformer, ie below the transformer cover 4.
  • FIG. 2 shows a further embodiment of the invention, in which, deviating from the solution described so far, both electronic diverter switch 7 and mechanical contact system 8 are arranged below the transformer cover 4 and thus in the boiler 1.
  • the required base area for the arrangement is determined solely by the dimensioning of the winding 2 and the resulting size of the boiler 1.
  • the tap changer requires according to the invention no additional footprint.
  • this advantage of the minimized footprint is particularly significant for distribution transformers in corresponding compact stations.
  • the invention operates in an advantageous manner with an electronic diverter switch, which has power electronic switching elements.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Regulation Of General Use Transformers (AREA)

Description

Die Erfindung betrifft eine Anordnung mit einem Stufenschalter und einem Regeltransformator, insbesondere einem elektronischen Stufenschalter, insbesondere an einem Verteiltransformator.The invention relates to an arrangement with a tap changer and a control transformer, in particular an electronic tap changer, in particular on a distribution transformer.

Stufenschalter dienen zur unterbrechungslosen Umschaltung zwischen Wicklungsanzapfungen eines Regeltransformators. Sie sind seit vielen Jahren Stand der Technik und in zahlreichen Ausführungsformen mit mechanischen Kontakten oder Vakuumschaltröhren oder auch Halbleiterschaltern als Schaltelementen zur Lastumschaltung bekannt.Tap changers are used for uninterrupted switching between winding taps of a control transformer. They have been state of the art for many years and known in numerous embodiments with mechanical contacts or vacuum interrupters or semiconductor switches as switching elements for load switching.

Aus der Veröffentlichung "Krämer: On-Load Tap-Changers for Power Transformers", MR-Publication, 2000, Seite 6 sind die unterschiedlichen bekannten Anordnungen eines Stufenschalters am bzw. im Transformator bekannt. Beim sogen. "In-tank-type" (Einbauschalter) befindet sich der Stufenschalter vollständig eingesenkt in den Transformatorkessel seitlich neben den Wicklungen des Transformators und ist von dessen Ölvolumen umgeben. Abhängig von der Bauform besitzen der Lastumschalter oder auch der komplette eingelassene Stufenschalter ein separates Ölvolumen.From the publication "Kramer: On-Load Tap Changers for Power Transformers", MR Publication, 2000, page 6, the different known arrangements of a tap changer on or in the transformer are known. When so-called. "In-tank-type" (built-in switch), the tap-changer is completely sunk into the transformer tank at the side of the windings of the transformer and surrounded by its oil volume. Depending on the design, the diverter switch or the complete recessed tap changer have a separate oil volume.

Beim sogen. "Compartment-type" (Anbauschalter) ist der Stufenschalter seitlich am Transformatorkessel angeordnet und steht über Durchführungen mit der Regelwicklung in Verbindung. Üblicherweise weist der seitlich angebaute Stufenschalter ein separates Ölvolumen auf. Aus der DE 101 02 310 C1 ist ein Stufenschalter mit mindestens einem Überschaltwiderstand und Halbleiter-Schaltelementen bekannt, wobei nur der Stufenwähler im ölgefüllten Transformatorkessel untergebracht ist, während der eigentliche Lastumschalter mit Thyristoren als Halbleiterschalt-Elementen in einem seitlich angebauten separaten Gehäuse in Luft sich befindet. Der Überschaltwiderstand wiederum ist in einem weiteren seitlichen separaten Gehäuseteil in Luft angeordnet.When so-called. "Compartment-type" (switch-on switch), the tap-changer is arranged on the side of the transformer tank and communicates with the control winding via feed-throughs. Usually, the laterally mounted tap changer has a separate oil volume. From the DE 101 02 310 C1 is a tap changer with at least one switching resistor and semiconductor switching elements known, wherein only the tap selector is housed in the oil-filled transformer tank, while the actual load switch with thyristors as semiconductor switching elements in a laterally mounted separate housing is in the air. The switching resistance in turn is arranged in a further lateral separate housing part in air.

Aus der DE 912 366 C ist eine Anordnung mit einem Stufenschalter und einem Regeltransformator gemäß dem Oberbegriff von Anspruch 1 bekannt.From the DE 912 366 C an arrangement with a tap changer and a control transformer according to the preamble of claim 1 is known.

Nachteilig bei den bekannten Anordnungen mit einem Stufenschalter und einem Regeltransformator, wobei der Stufenschalter im Transformator oder seitlich am Transformator angeordnet ist, ist eine erforderliche entsprechend breitere oder längere Transformatorbauweise. Speziell bei Verteiltransformatoren bzw. Ortsnetztransformatoren würde eine solche entsprechend breitere oder längere Transformatorenbauweise, die den Platz für den Stufenschalter mit umfasst, zu entsprechend größeren Kompaktstationen führen. Dies ist jedoch unerwünscht, da größere Kompaktstationen entsprechend teuer sind und vor allem auch mehr Aufstellplatz beanspruchen.A disadvantage of the known arrangements with a tap changer and a control transformer, wherein the tap changer is arranged in the transformer or on the side of the transformer, is a required correspondingly wider or longer transformer design. Especially in distribution transformers or local power transformers such a correspondingly wider or longer transformer design, which includes the space for the tap changer, would lead to correspondingly larger compact stations. However, this is undesirable because larger compact stations are correspondingly expensive and above all claim more space.

Aufgabe der Erfindung ist es daher, eine Anordnung mit einem Stufenschalter und einem Regeltransformator vorzusehen, die die durch den Transformator vorgegebene Grundfläche nicht vergrößert und insgesamt eine effiziente, raumsparende und kostengünstige Integration des Stufenschalters mit einem Regeltransformator gestattet.The object of the invention is therefore to provide an arrangement with a tap changer and a control transformer, which does not specify the predetermined by the transformer base increased and overall an efficient, space-saving and cost-effective integration of the tap changer with a control transformer allowed.

Diese Aufgabe wird durch eine Anordnung mit den Merkmalen des ersten Patentanspruches gelöst. Die Unteransprüche betreffen vorteilhafte Weiterbildungen der Erfindung.This object is achieved by an arrangement having the features of the first claim. The subclaims relate to advantageous developments of the invention.

Der Erfindung liegt die allgemeine Idee zugrunde, den Stufenschalter oberhalb des Eisenjochs des Regeltransformators und damit insgesamt oberhalb am oder im Regeltransformator vorzusehen. Dies ist besonders vorteilhaft bei Kompaktstationen, die in der Regel nach oben genügend Platz bieten. Besonders bei solchen Kompaktstationen ist ein möglichst geringer Aufstellplatz gewünscht, um den notwendigen Grunderwerb für das Aufstellen so gering als möglich zu halten. Die Höhe der auf der entsprechenden Fläche installierten Kompaktstationen hingegen beeinflusst diese Kosten nicht.The invention is based on the general idea to provide the tap changer above the iron yoke of the control transformer and thus a total of above or on the control transformer. This is particularly advantageous in compact stations, which usually provide up enough space. Especially with such compact stations the smallest possible space is desired to keep the necessary land acquisition for setting up as low as possible. In contrast, the height of the compact stations installed on the corresponding area does not affect these costs.

Nach einer ersten Ausführungsform der Erfindung befindet sich das mechanische Kontaktsystem des Stufenschalters unterhalb des Transformatordeckels und damit innerhalb des Transformators, der eigentliche Lastumschalter hingegen oberhalb des Transformatordeckels und damit außerhalb des Transformators.According to a first embodiment of the invention, the mechanical contact system of the tap changer is below the transformer cover and thus within the transformer, the actual diverter switch, however, above the transformer cover and thus outside of the transformer.

Gemäß einer weiteren Ausführungsform der Erfindung befindet sich der komplette Stufenschalter d. h. sowohl das mechanische Kontaktsystem als auch der Lastumschalter, unterhalb des Transformatordeckels und damit innerhalb des Transformators.According to a further embodiment of the invention, the complete tap d is located. H. Both the mechanical contact system and the diverter switch, below the transformer cover and thus within the transformer.

Besonders vorteilhaft ist es, das mechanische Kontaktsystem und den Lastumschalter durch eine isolierende Durchführungsplatte voneinander zu trennen.It is particularly advantageous to separate the mechanical contact system and the diverter switch from one another by means of an insulating lead-through plate.

Weiterhin vorteilhaft ist es, im Rahmen der Erfindung den Lastumschalter als leistungselektronischen Lastumschalter mit elektronischen Schaltmitteln wie Thyristoren oder IGBT's vorzusehen.In the context of the invention it is also advantageous to provide the diverter switch as a power electronic diverter switch with electronic switching means such as thyristors or IGBTs.

Bei einer Ausführungsform mit einem solchen leistungselektronischen Lastumschalter und einer Trennung vom mechanischen Kontaktsystem durch die erwähnte isolierende Durchführungsplatte können damit die elektronischen Bauelemente in Luft, das mechanische Kontaktsystem hingegen in Öl betrieben werden - ihren bevorzugten Umgebungsmedien.In one embodiment with such a power electronic diverter switch and a separation from the mechanical contact system by the mentioned insulating bushing plate so that the electronic components in air, the mechanical contact system, however, are operated in oil - their preferred environment media.

Auf besonders vorteilhafte Weise ist ein separater Deckel vorgesehen, so dass der leistungselektronische Lastumschalter ohne weiteres separat von oben zugänglich ist.In a particularly advantageous manner, a separate lid is provided, so that the power electronic diverter switch is easily accessible separately from above.

Die Erfindung soll nachfolgend an Hand von Ausführungsbeispielen näher erläutert werden.The invention will be explained in more detail with reference to exemplary embodiments.

Es zeigen:

Figur 1
eine erste Ausführungsform einer erfindungsgemäßen Anordnung
Figur 2
eine zweite Ausführungsform einer erfindungsgemäßen Anordnung.
Show it:
FIG. 1
a first embodiment of an arrangement according to the invention
FIG. 2
A second embodiment of an arrangement according to the invention.

In Figur 1 ist in schematischer Darstellung ein Kessel 1 eines Regeltransformators gezeigt, in dessen Innerem sich Wicklungen 2 und mindestens ein Eisenjoch 3 befinden. Oben ist der Kessel 1 durch einen Transformatordeckel 4 abgeschlossen. Üblicherweise ist der komplette Kessel 1 ölgefüllt. Oberhalb des Transformatordeckels 4 sind noch die MS-Durchführung 5 und die NS-Durchführung 6 angedeutet. Die Verbindung zu der Primär- bzw. Sekundärseite der Wicklung 2 im Inneren des Transformators und die elektrischen Verbindungen von der Regelwicklung zum Stufenschalter sind nicht gezeigt. Oberhalb des Eisenjoches 3 ist ein Stufenschalter angeordnet, der einen elektronischen Lastumschalter 7 und darunter ein mechanisches Kontaktsystem 8, den Wähler, aufweist. Lastumschalter 7 und Kontaktsystem 8 sind durch eine horizontale Durchführungsplatte 9 hermetisch voneinander getrennt. Die elektrischen Verbindungen von den beiden Teilen des Stufenschalters durch die Durchführungsplatte 9 hindurch sind wiederum nicht dargestellt. Das Gehäuse des Stufenschalters besitzt oben einen separat zu öffnenden Deckel 10. Es ist zu sehen, dass bei dieser Ausführungsform sich der elektronische Lastumschalter 7 oberhalb des Transformatordeckels 4 befindet, während das mechanische Kontaktsystem 8 sich innerhalb des Transformators, d. h. unterhalb des Transformatordeckels 4 befindet.In FIG. 1 is a schematic representation of a boiler 1 of a control transformer shown in the interior of which windings 2 and at least one iron yoke 3 are located. Above the boiler 1 is completed by a transformer cover 4. Usually, the complete boiler 1 is filled with oil. Above the transformer cover 4, the MS bushing 5 and the NS bushing 6 are still indicated. The connection to the primary or secondary side of the winding 2 inside the transformer and the electrical connections from the control winding to the tap changer are not shown. Above the iron yoke 3, a tap changer is arranged, which has an electronic diverter switch 7 and below a mechanical contact system 8, the selector. Diverter switch 7 and contact system 8 are hermetically separated by a horizontal lead-through plate 9. The electrical connections from the two parts of the tap changer through the lead-through plate 9 are again not shown. It can be seen that in this embodiment, the electronic diverter switch 7 is located above the transformer cover 4, while the mechanical contact system 8 is located within the transformer, ie below the transformer cover 4.

Figur 2 zeigt eine weitere Ausführungsform der Erfindung, bei der, abweichend von der bisher beschriebenen Lösung, sowohl elektronischer Lastumschalter 7 als auch mechanisches Kontaktsystem 8 unterhalb des Transformatordeckels 4 und damit im Kessel 1 angeordnet sind. FIG. 2 shows a further embodiment of the invention, in which, deviating from the solution described so far, both electronic diverter switch 7 and mechanical contact system 8 are arranged below the transformer cover 4 and thus in the boiler 1.

Bei beiden Ausführungsformen ist durch die Anordnung des Stufenschalters oberhalb des Eisenjochs 3 sichergestellt, dass die benötigte Grundfläche für die Anordnung ausschließlich durch die Dimensionierung der Wicklung 2 und sich daraus ergebende Größe des Kessels 1 festgelegt ist. Der Stufenschalter hingegen benötigt erfindungsgemäß keine zusätzliche Aufstellfläche.In both embodiments, it is ensured by the arrangement of the tap changer above the iron yoke 3, that the required base area for the arrangement is determined solely by the dimensioning of the winding 2 and the resulting size of the boiler 1. The tap changer, however, requires according to the invention no additional footprint.

Wie bereits erläutert, ist dieser Vorteil der minimierten Aufstellfläche besonders für Verteiltransformatoren in entsprechenden Kompaktstationen bedeutsam. Die Erfindung arbeitet auf vorteilhafte Weise mit einem elektronischen Lastumschalter, der leistungselektronische Schaltelemente aufweist.As already explained, this advantage of the minimized footprint is particularly significant for distribution transformers in corresponding compact stations. The invention operates in an advantageous manner with an electronic diverter switch, which has power electronic switching elements.

Claims (1)

  1. Arrangement of a tap changer at a regulating transformer, wherein the tap changer comprises a mechanical contact system (8) for selection of a tap of a regulating winding of the regulating transformer as well as a load changeover switch (7) for the actual on-load switching over, wherein the regulating transformer comprises an oil-filled vessel (1) in which at least one yoke (3) and windings 2) are disposed, wherein the vessel (1) is closed at the top by a transformer cover (4) and wherein the mechanical contact system (8) of the tap changer is arranged within the vessel (1) below the transformer cover (4) and above the yoke (3), characterised in that the load changeover switch (7) is arranged outside the vessel (1) above the transformer cover (4) in air, that the load changeover switch (7) and mechanical contact system (8) of the tap changer are separated from one another by a horizontal insulating lead-through plate (9), that the load changeover switch (7) comprises electronic power switching means, particularly thyristors or IGBTs, for uninterrupted on-load switching over and that the regulating transformer is a local mains transformer or a consumer-proximal distributing transformer.
EP10720133.7A 2009-07-30 2010-05-08 Arrangement comprising a stepping switch and a control transformer Not-in-force EP2460168B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009035699A DE102009035699A1 (en) 2009-07-30 2009-07-30 Arrangement of a tap changer on a control transformer
PCT/EP2010/002820 WO2011012181A1 (en) 2009-07-30 2010-05-08 Arrangement of a stepping switch on a control transformer

Publications (2)

Publication Number Publication Date
EP2460168A1 EP2460168A1 (en) 2012-06-06
EP2460168B1 true EP2460168B1 (en) 2014-09-10

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EP10720133.7A Not-in-force EP2460168B1 (en) 2009-07-30 2010-05-08 Arrangement comprising a stepping switch and a control transformer

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US (1) US8648587B2 (en)
EP (1) EP2460168B1 (en)
JP (1) JP2013500594A (en)
KR (1) KR20120050435A (en)
CN (1) CN102473540B (en)
DE (1) DE102009035699A1 (en)
HK (1) HK1168194A1 (en)
WO (1) WO2011012181A1 (en)

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DE102008027274B3 (en) * 2008-06-06 2009-08-27 Maschinenfabrik Reinhausen Gmbh Power transformer with tap changer

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KR20120050435A (en) 2012-05-18
EP2460168A1 (en) 2012-06-06
JP2013500594A (en) 2013-01-07
DE102009035699A1 (en) 2011-02-10
HK1168194A1 (en) 2012-12-21
CN102473540A (en) 2012-05-23
WO2011012181A1 (en) 2011-02-03
CN102473540B (en) 2015-02-04
US8648587B2 (en) 2014-02-11
US20120112730A1 (en) 2012-05-10

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