WO2012028222A1 - Cooled transformer having at least one strip winding - Google Patents

Cooled transformer having at least one strip winding Download PDF

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Publication number
WO2012028222A1
WO2012028222A1 PCT/EP2011/003569 EP2011003569W WO2012028222A1 WO 2012028222 A1 WO2012028222 A1 WO 2012028222A1 EP 2011003569 W EP2011003569 W EP 2011003569W WO 2012028222 A1 WO2012028222 A1 WO 2012028222A1
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WO
WIPO (PCT)
Prior art keywords
winding
modules
cooling channel
transformer
tape
Prior art date
Application number
PCT/EP2011/003569
Other languages
German (de)
French (fr)
Inventor
Benjamin Weber Weber
Bhavesh Patel
Burak Esenlik
Frank Cornelius
Marcos Bockholt
Jens Tepper
Original Assignee
Abb Technology Ag
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 Abb Technology Ag filed Critical Abb Technology Ag
Priority to BR112013005110A priority Critical patent/BR112013005110A2/en
Priority to CA2809897A priority patent/CA2809897A1/en
Priority to CN2011800423481A priority patent/CN103168331A/en
Publication of WO2012028222A1 publication Critical patent/WO2012028222A1/en
Priority to US13/780,519 priority patent/US20130176092A1/en

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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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2847—Sheets; Strips
    • 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
    • H01F27/08—Cooling; Ventilating
    • H01F27/085—Cooling by ambient air
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2847—Sheets; Strips
    • H01F27/2852—Construction of conductive connections, of leads
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2876—Cooling

Definitions

  • the invention relates to a belt winding for a transformer comprising a plurality of winding modules each having a wound around a winding tape conductor, wherein at least two radially adjacent winding modules, a winding segment is formed, wherein between at least two radially adjacent winding modules at least one extending in the axial direction of the cooling channel is provided wherein at least two axially adjacent winding segments are provided, and wherein the winding modules are electrically connected in series by connecting conductors.
  • coil windings are often used as windings for dry type transformers, for example in the power range from a few 100kW to 10MW and above, on the low side.
  • Tape windings offer the advantage of being able to conduct correspondingly high currents at a secondary voltage rather low of a few kV, whereby, for example, the effect of current displacement due to the flat conductor structure is advantageously reduced here.
  • the conductor current is correspondingly lower, so that here turns out to be useful a winding of a round or rectangular conductor.
  • Low and high voltage winding are usually made on the same bobbin, for reasons of isolation, the low-voltage winding is arranged radially inward and the high-voltage winding radially outward.
  • Winding conductors for strip winding usually have a rectangular cross-section, wherein the winding itself is similar to a roll.
  • CONFIRMATION COPY it may be useful to arrange one core leg of a transformer two or more such windings axially one above the other.
  • a tape winding in the radial direction is divided into a plurality of hollow cylindrical sections or modules, wherein between two radially adjacent modules, a mostly also hollow cylindrical cooling channel is formed, which in turn is formed depending on the embodiment of a plurality of tube-like smaller channels.
  • tape windings it is not uncommon for tape windings to be formed in both the axial and radial directions from adjacent winding modules which are to be connected in series to achieve the desired electrical functionality. It is important to pay attention to the correct winding sense of the winding modules, so that a voltage induced in the individual modules not mutually - not partially - compensated.
  • a tape winding of the aforementioned type This is characterized in that at least one connecting conductor is guided at least in sections along the axial extent of the cooling channel through this.
  • the basic idea of the invention is to use the space available in the interior of the cooling channel for the arrangement of connecting conductors of the band winding. Connecting conductors are usually rod-shaped, so that the cooling effect is - if anything - only slightly affected.
  • the connecting conductors can be introduced in an advantageous manner in the manufacture of the cooling channels of the winding in this.
  • a coil production would then typically comprise first the winding of the radially innermost modules, followed by the introduction of the cooling channel, wherein if necessary at least one of the winding ends of the radially innermost winding modules through at least a portion of the cooling channel by means of the connecting conductors to one of the end faces of the winding to be produced to be led. After introducing the cooling channel, the radially next following winding modules are then to be wound, wherein likewise, if necessary, a conductor end can be guided by means of a provided in the cooling channel connecting conductor to one of the two end sides.
  • an elongated discharge rail is provided as a connecting conductor routed through the cooling channel.
  • Aus effetsschienen have at least at one of their ends good connection options to other Aus effetsschienen, as frontally required for the connection of the individual winding modules.
  • Aus effetsschienen to commercially available components, which require no additional design effort and which of its diameter, for example, a few centimeters, are well accommodated in a cooling channel.
  • at least two connecting conductors are electrically connected to one end face or end face of the band winding. Subsequent connection of the winding segments after completion of the winding of all required winding segments including a possible high-voltage winding for reasons of accessibility on one of the end sides of the winding is particularly advantageous.
  • a strip winding according to the invention also apply correspondingly to a transformer, comprising a transformer core, at least one tape winding according to one of claims 1 - 3 as a low-voltage winding and at least one further galvanically isolated winding as a high-voltage winding.
  • a transformer comprising a transformer core, at least one tape winding according to one of claims 1 - 3 as a low-voltage winding and at least one further galvanically isolated winding as a high-voltage winding.
  • this allows both a reduced design of the entire transformer as well as a simplified assembly.
  • such a transformer is preferably constructed in three phases, thus has a total of three upper voltage and three lower voltage windings, which are galvanically separated from each other.
  • FIG. 2 is a plan view of a second exemplary tape winding
  • FIG. 5 shows a section through a fifth exemplary tape winding
  • FIG. 6 shows a side view of a three-phase transformer with a tape winding
  • the band- Winding has two winding segments, wherein the first winding segment of two radially adjacent winding modules 12 and the second winding segment of two radially along the axis indicated by the reference numeral 20 axis adjacent winding segments 14 is formed.
  • the winding segments 12, 14 are each indicated in its cross section as a rectangle, wherein the winding segment 14 shown in the left bottom left is still shown in several winding layers 18 of a strip conductor.
  • Each winding layer is surrounded by an insulating layer so as to be able to isolate a voltage difference at least to the adjacent winding layer.
  • each winding segment 12, 14 has an approximately hollow cylindrical configuration.
  • a cooling channel extending over the entire axial length of the winding, which, for example, can be made predominantly of an insulating plastic material and which is indicated by the reference arrow 22.
  • a cooling channel may for example be made of shell segments, which result in a composite form two nested hollow cylinder, wherein the actual cooling channel is formed by the enclosed by the hollow cylinders interior.
  • the hollow cylinders are to be spaced from each other with suitable preferably oriented in the axial direction elements, for example by webs.
  • Two of the electrical connections of the winding modules 14 of the second winding segment are guided via connecting conductor 26 to save space in the interior of the cooling channel 22 to the upper end side of the tape winding.
  • connection points 24 are at connection points 24, for example by means of a screw connection, electrically connected to terminals of the winding modules 12 of the first winding segment.
  • the respective other electrical connections of the two winding modules 14 are connected to each other at the opposite end side with a connecting conductor 28, so that all four winding modules are electrically connected in series.
  • Radially outside a high-voltage winding 30 is indicated, which is arranged by a stray channel 32 spaced around the radially outer winding modules. If required, the stray channel 32 is likewise suitable for conducting connecting conductor 26, at least in sections, to one of the two end faces of the winding.
  • Fig. 2 shows a plan view 40 on second exemplary tape winding.
  • the hollow cylindrical shape of arranged around a rotation axis 42 winding modules 44, 48 clearly, between which a likewise hollow cylindrical cooling channel 48 is indicated.
  • the reference numerals 50, 52 indicate two rod-like connecting conductors with a square cross-section. With these an electrical connection of - in this Fig. Not recognizable - axially adjacent winding modules allows.
  • Fig. 3 shows a section 60 through a third exemplary tape winding. This is very similar in structure to the winding shown in Fig. 1, but a total of eight winding modules 64 are provided in two winding segments, wherein a total of three cooling channels 62 are formed. However, a guide of connecting conductors is necessary in this example only in the radially inner and in the radially outer cooling channel. A high-voltage winding is not shown, but to be considered as radially outside available.
  • FIG. 4 shows a section 70 through a fourth exemplary band winding, in which a total of six winding modules are provided in three winding segments.
  • the electrical connection of the axially middle winding segment takes place at connection points, which are partially not on one of the end faces. This requires additional attention in the sequence of the winding process of the respective winding modules, which is thereby somewhat more complex.
  • FIG. 5 shows a further variant according to the invention in the form of a section 80 through a fifth exemplary band winding, this time with six winding modules, two winding segments and two cooling channels.
  • Fig. 6 shows a side view 90 on three-phase transformer with tape winding.
  • There are a total of three common bobbins 96, 98, 100 are provided, which in each case radially inwardly lying underneath a band-side tape winding and radially outboard have a top-side round or rectangular material winding, which does not emerge from this illustration.
  • Each of the three bobbins is disposed along a respective winding axis 92 about a respective leg of a three-phase transformer core 94.
  • the inventive arrangement of connecting conductors in cooling channels - both in the figure not indicated - decreases the size of the transformer or is at the same size increased power rating possible.
  • first low-voltage winding with first high-voltage winding second low-voltage winding with second high-voltage winding third low-voltage winding with third high-voltage winding

Abstract

The invention relates to a strip winding (10, 40, 60, 70, 80) for a transformer (90), comprising a plurality of winding modules (12, 14, 44, 46, 64) each having a strip conductor (18) wound around a winding axis (16, 42, 66, 92). A winding segment is formed by at least two radially adjacent winding modules (12, 14, 44, 46, 64), wherein at least one cooling channel (22, 48, 62) extending in the axial (16, 42, 66, 92) direction is provided between at least two radially adjacent (20) winding modules (12, 14, 44, 46, 64). At least two axially (16, 42, 66, 92) adjacent winding segments are provided, and the winding modules (12, 14, 44, 46, 64) are connected electrically in series by connecting conductors (26, 50, 52). At least one connecting conductor (26, 50, 52) is led at least in sections through the cooling channel along the axial (16, 42, 66, 92) extension of said cooling channel (22, 48, 62).

Description

GEKÜHLTER TRANSFORMATOR MIT MINDESTENS EINEM BANDWICKLUNG  COOLED TRANSFORMER WITH AT LEAST ONE BELT WINDING
Beschreibung description
Die Erfindung betrifft eine Bandwicklung für einen Transformator, umfassend mehrere Wicklungsmodule mit jeweils einem um eine Wickelachse gewickelten Bandleiter, wobei durch wenigstens zwei radial benachbarte Wicklungsmodule ein Wicklungssegment gebildet ist, wobei zwischen wenigstens zwei radial benachbarten Wicklungsmodulen wenigstens ein in axialer Richtung verlaufender Kühlkanal vorgesehen ist, wobei wenigstens zwei axial benachbarte Wicklungssegmente vorgesehen sind und wobei die Wicklungsmodule durch Verbindungsleiter elektrisch in Reihe geschaltet sind. The invention relates to a belt winding for a transformer comprising a plurality of winding modules each having a wound around a winding tape conductor, wherein at least two radially adjacent winding modules, a winding segment is formed, wherein between at least two radially adjacent winding modules at least one extending in the axial direction of the cooling channel is provided wherein at least two axially adjacent winding segments are provided, and wherein the winding modules are electrically connected in series by connecting conductors.
Es ist allgemein bekannt, dass als Wicklungen für Trockentransformatoren, beispielsweise im Leistungsbereich von einigen 100kW bis hin zu 10MW und darüber, unterspannungsseitig häufig Bandwicklungen verwendet werden. Bandwicklungen bieten den Vorteil, bei einer sekundärseitigen eher geringen Spannung von einigen kV entsprechend hohe Ströme zu leiten, wobei hier beispielsweise der Effekt der Stromverdrängung durch den flachen Leiteraufbau in vorteilhafter Weise reduziert ist. Oberspannungsseitig, bei einer Primärspannung von beispielsweise einigen 10kV, ist der Leiterstrom entsprechend geringer, so dass sich hier eine Wicklung aus einem runden oder rechteckigen Leiter als sinnvoll erweist. Unter- und Oberspannungswicklung werden zumeist auf demselben Spulenkörper gefertigt, wobei aus Isolationsgründen die Unterspannungswicklung radial innen und die Oberspannungswicklung radial außen angeordnet ist. It is well known that coil windings are often used as windings for dry type transformers, for example in the power range from a few 100kW to 10MW and above, on the low side. Tape windings offer the advantage of being able to conduct correspondingly high currents at a secondary voltage rather low of a few kV, whereby, for example, the effect of current displacement due to the flat conductor structure is advantageously reduced here. On the high voltage side, at a primary voltage of for example a few 10 kV, the conductor current is correspondingly lower, so that here turns out to be useful a winding of a round or rectangular conductor. Low and high voltage winding are usually made on the same bobbin, for reasons of isolation, the low-voltage winding is arranged radially inward and the high-voltage winding radially outward.
Wicklungsleiter für Bandwicklung weisen zumeist einen rechteckförmigen Querschnitt auf, wobei die Wicklung an sich rollenähnlich aufgebaut ist. Eine Wicklungslage weist demgemäß genau einen außen isolierten rechteckförmigen Wicklungsleiter auf, der spiralförmig um eine Wickelachse gewickelt ist. Je nach Transformatorausführung Winding conductors for strip winding usually have a rectangular cross-section, wherein the winding itself is similar to a roll. A winding layer accordingly has exactly one externally insulated rectangular winding conductor, which is spirally wound around a winding axis. Depending on the transformer version
BESTÄTIGUNGSKOPIE kann es jedoch sinnvoll sein, auf einen Kernschenkel eines Transformators zwei oder mehr derartiger Wicklungen axial übereinander anzuordnen. CONFIRMATION COPY However, it may be useful to arrange one core leg of a transformer two or more such windings axially one above the other.
Darüber hinaus ist zu Kühlzwecken zumeist wenigstens ein längs der axialen Erstreckung der Wicklung geführter Kühlkanal notwendig, um die Verlustwärme vorzugsweise mittels natürlicher Luftkühlung aus dem Wicklungsinneren herauszuführen. Um eine optimale Kühlwirkung zu erreichen, ist eine Bandwicklung in radialer Richtung in mehrere hohlzylindrische Abschnitte oder Module aufgeteilt, wobei zwischen zwei radial aneinandergrenzenden Modulen ein zumeist ebenfalls hohlzylindrischer Kühlkanal ausgebildet ist, der seinerseits je nach Ausführungsform auch aus mehreren rohrähnlichen kleineren Kanälen gebildet ist. In addition, for cooling purposes usually at least one along the axial extent of the winding guided cooling channel necessary to bring out the heat loss preferably by means of natural air cooling from the winding interior. In order to achieve an optimal cooling effect, a tape winding in the radial direction is divided into a plurality of hollow cylindrical sections or modules, wherein between two radially adjacent modules, a mostly also hollow cylindrical cooling channel is formed, which in turn is formed depending on the embodiment of a plurality of tube-like smaller channels.
Daher ist es nicht unüblich, dass Bandwicklungen sowohl in axialer als auch in radialer Richtung aus aneinandergrenzenden Wicklungsmodulen gebildet sind, welche zur Erreichung der gewünschten elektrischen Funktionalität in Reihe zu schalten sind. Hierbei ist auf den korrekten Wickelsinn der Wicklungsmodule zu achten, so dass sich eine in den einzelnen Modulen induzierte Spannung nicht gegenseitig - auch nicht teilweise - kompensiert. Therefore, it is not uncommon for tape windings to be formed in both the axial and radial directions from adjacent winding modules which are to be connected in series to achieve the desired electrical functionality. It is important to pay attention to the correct winding sense of the winding modules, so that a voltage induced in the individual modules not mutually - not partially - compensated.
Nachteilig ist jedoch, dass bei der Fertigung derartiger Bandleiterwicklungen eine elektrische Reihenschaltung der einzelnen Module zumeist erst nach Wickeln des äußersten Wicklungsmoduls erfolgen kann, was insbesondere bei einer radial üblicherweise vorzusehenen Oberspannungswicklung zu einer umständlichen und Platz verschwendenden Leiterführung um die radial außen liegende Oberspannungswicklung führt. The disadvantage, however, is that in the production of such strip conductor windings, an electrical series connection of the individual modules usually can be done only after winding the outermost winding module, which leads to a cumbersome and space wasting conductor guide to the radially outer high-voltage winding in particular at a radially usually provided high-voltage winding.
Ausgehend von diesem Stand der Technik ist es Aufgabe der Erfindung, eine platzsparende und vereinfachte Möglichkeit einer elektrischen Reihenschaltung der einzelnen Wicklungsmodule einer Bandwicklung anzugeben. Based on this prior art, it is an object of the invention to provide a space-saving and simplified possibility of electrical series connection of the individual winding modules of a tape winding.
Diese Aufgabe wird gelöst durch eine Bandwicklung der eingangs genannten Art. Diese ist dadurch gekennzeichnet, dass wenigstens ein Verbindungsleiter zumindest abschnittsweise längs der axialen Erstreckung des Kühlkanals durch diesen geführt ist. Die Grundidee der Erfindung besteht darin, den im Inneren des Kühlkanals vorhandenen Platz für die Anordnung von Verbindungsleitern der Bandwicklung zu verwenden. Verbindungsleiter sind zumeist stangenförmig ausgeprägt, so dass die Kühlwirkung dadurch - wenn überhaupt - nur unwesentlich beeinträchtigt wird. Die Verbindungsleiter können in vorteilhafter Weise bei der Fertigung der Kühlkanäle der Wicklung in diese eingebracht werden. Eine Spulenfertigung würde dann typischerweise erst die Wicklung der radial innersten Module umfassen, woran sich dann das Einbringen des Kühlkanals anschließt, wobei bedarfsweise wenigstens eines der Wicklungsenden der radial innersten Wicklungsmodule durch zumindest einen Abschnitt des Kühlkanals mittels der Verbindungsleiter an eine der Stirnseiten der zu fertigenden Wicklung geführt wird. Nach Einbringen des Kühlkanals sind dann die radial nächstfolgenden Wicklungsmodule zu wickeln, wobei ebenfalls bedarfsweise ein Leiterende mittels eines durch einen im Kühlkanal vorgesehenen Verbindungsleiter an eine der beiden Stirnseiten geführt werden kann. This object is achieved by a tape winding of the aforementioned type. This is characterized in that at least one connecting conductor is guided at least in sections along the axial extent of the cooling channel through this. The basic idea of the invention is to use the space available in the interior of the cooling channel for the arrangement of connecting conductors of the band winding. Connecting conductors are usually rod-shaped, so that the cooling effect is - if anything - only slightly affected. The connecting conductors can be introduced in an advantageous manner in the manufacture of the cooling channels of the winding in this. A coil production would then typically comprise first the winding of the radially innermost modules, followed by the introduction of the cooling channel, wherein if necessary at least one of the winding ends of the radially innermost winding modules through at least a portion of the cooling channel by means of the connecting conductors to one of the end faces of the winding to be produced to be led. After introducing the cooling channel, the radially next following winding modules are then to be wound, wherein likewise, if necessary, a conductor end can be guided by means of a provided in the cooling channel connecting conductor to one of the two end sides.
So ist es in vorteilhafter Weise ermöglicht - auch nach abschließendem Wickeln einer radial außen liegenden Oberspannungswicklung - die an den Stirnseiten herausgeführten Verbindungsleiter platzsparend miteinander zu verbinden. Je nach Anzahl der axial und radial aneinandergrenzenden Wicklungsmodule ergibt sich eine Vielzahl von möglichen Verbindungsvarianten. Wie eingangs erwähnt ist in jedem Fall auf den Wickelsinn der jeweiligen Wicklungsmodule zu achten, wodurch eine zusätzliche Randbedingung für die Anordnung der Verbindungsleiter entsteht. Thus, it is possible in an advantageous manner - even after the final winding of a radially outer high-voltage winding - to lead out the lead-out on the front ends connecting conductor space-saving to each other. Depending on the number of axially and radially adjacent winding modules results in a variety of possible connection variants. As mentioned above, the winding direction of the respective winding modules must be taken into account in each case, which creates an additional boundary condition for the arrangement of the connecting conductors.
In einer bevorzugten Ausgestaltung der erfindungsgemäßen Bandwicklung ist als durch den Kühlkanal geführter Verbindungsleiter eine verlängerte Ausleitungsschiene vorgesehen. Ausleitungsschienen weisen zumindest an einem von ihren Enden gute Verbindungsmöglichkeiten zu weiteren Ausleitungsschienen vor, wie stirnseitig zur Verbindung der einzelnen Wicklungsmodule gefordert. Zudem handelt es sich bei Ausleitungsschienen um handelsübliche Bauteile, welche keinen zusätzlichen Konstruktionsaufwand erfordern und welche von ihrem Durchmesser, beispielsweise einigen Zentimetern, gut in einem Kühlkanal unterzubringen sind. Entsprechend einer weiteren Erfindungsvariante sind wenigstens zwei Verbindungsleiter an einer Stirnfläche bzw. Stirnseite der Bandwicklung elektrisch verbunden. Ein nachträgliches Verbinden der Wicklungssegmente ist nach Abschluss des Wickelns aller benötigten Wicklungssegmente inklusive einer eventuellen Oberspannungswicklung aus Zugänglichkeitsgründen an einer der Stirnseiten der Wicklung besonders vorteilhaft. In a preferred embodiment of the tape winding according to the invention, an elongated discharge rail is provided as a connecting conductor routed through the cooling channel. Ausleitungsschienen have at least at one of their ends good connection options to other Ausleitungsschienen, as frontally required for the connection of the individual winding modules. In addition, it is Ausleitungsschienen to commercially available components, which require no additional design effort and which of its diameter, for example, a few centimeters, are well accommodated in a cooling channel. According to a further variant of the invention, at least two connecting conductors are electrically connected to one end face or end face of the band winding. Subsequent connection of the winding segments after completion of the winding of all required winding segments including a possible high-voltage winding for reasons of accessibility on one of the end sides of the winding is particularly advantageous.
Die mit einer erfindungsgemäßen Bandwicklung erzielten Vorteile gelten entsprechend auch für einen Transformator, umfassend einen Transformatorkern, wenigstens eine Bandwicklung nach einem der Ansprüche 1 - 3 als Unterspannungswicklung und wenigstens eine weitere galvanisch getrennte Wicklung als Oberspannungswicklung. In vorteilhafter Weise wird hierdurch nämlich sowohl eine verkleinerte Bauweise des gesamten Transformators als auch ein vereinfachter Zusammenbau ermöglicht. Um in Energieverteilungsnetzen eingesetzt werden zu können ist ein derartiger Transformator vorzugsweise dreiphasig aufgebaut, weist also insgesamt drei Oberspannungs- und drei Unterspannungswicklungen auf, welche galvanisch voneinander getrennt sind. The advantages achieved with a strip winding according to the invention also apply correspondingly to a transformer, comprising a transformer core, at least one tape winding according to one of claims 1 - 3 as a low-voltage winding and at least one further galvanically isolated winding as a high-voltage winding. Advantageously, this allows both a reduced design of the entire transformer as well as a simplified assembly. In order to be able to be used in power distribution networks such a transformer is preferably constructed in three phases, thus has a total of three upper voltage and three lower voltage windings, which are galvanically separated from each other.
Weitere vorteilhafte Ausgestaltungsmöglichkeiten sind den weiteren abhängigen Ansprüchen zu entnehmen. Further advantageous embodiment possibilities can be found in the further dependent claims.
Anhand der in den Zeichnungen dargestellten Ausführungsbeispiele sollen die Erfindung, weitere Ausführungsformen und weitere Vorteile näher beschrieben werden. Reference to the embodiments illustrated in the drawings, the invention, further embodiments and other advantages will be described in detail.
Es zeigen: Show it:
Fig. 1 einen Schnitt durch eine erste exemplarische Bandwicklung,  1 shows a section through a first exemplary tape winding,
Fig. 2 eine Draufsicht auf zweite exemplarische Bandwicklung, FIG. 2 is a plan view of a second exemplary tape winding; FIG.
Fig. 3 einen Schnitt durch eine dritte exemplarische Bandwicklung, 3 shows a section through a third exemplary tape winding,
Fig. 4 einen Schnitt durch eine vierte exemplarische Bandwicklung, 4 shows a section through a fourth exemplary tape winding,
Fig. 5 einen Schnitt durch eine fünfte exemplarische Bandwicklung sowie Fig. 6 eine Seitenansicht auf dreiphasigen Transformator mit Bandwicklung 5 shows a section through a fifth exemplary tape winding, and FIG. 6 shows a side view of a three-phase transformer with a tape winding
Fig. 1 zeigt einen Schnitt 10 durch eine erste exemplarische Bandwicklung, welche sich annähernd rotationssymmetrisch um eine Wickelachse 16 erstreckt. Die Band- Wicklung weist zwei Wicklungssegmente auf, wobei das erste Wicklungssegment von zwei radial benachbarten Wicklungsmodulen 12 und das zweite Wicklungssegment von zwei radial längs der mit der Bezugsziffer 20 angedeuteten Achse benachbarten Wicklungssegmenten 14 gebildet ist. Die Wicklungssegmente 12, 14 sind in ihrem Querschnitt jeweils als Rechteck angedeutet, wobei das in der Fig. links unten dargestellte Wicklungssegment 14 noch in mehreren Wickellagen 18 eines Bandleiters dargestellt ist. Jede Wickellage ist von einer Isolationsschicht umgeben, um so eine Spannungsdifferenz zumindest zur benachbarten Wickellage isolieren zu können. Je nach Ausführungsform der Wicklung ist die Isolation auch auf Nennspannung auszulegen. Ein derartiger Bandleiter hat je nach Ausführung eine Breite von mehreren Zentimetern bis beispielsweise knapp zwei Metern, wobei die Anzahl der Wickellagen die hier dargestellten vier Lagen deutlich übersteigt, beispielsweise mehrere 10 Lagen. Aufgrund der Anordnung um die gemeinsame 16 hat jedes Wicklungssegment 12, 14 eine etwa hohlzylindrische Ausgestaltung. 1 shows a section 10 through a first exemplary band winding, which extends approximately rotationally symmetrically about a winding axis 16. The band- Winding has two winding segments, wherein the first winding segment of two radially adjacent winding modules 12 and the second winding segment of two radially along the axis indicated by the reference numeral 20 axis adjacent winding segments 14 is formed. The winding segments 12, 14 are each indicated in its cross section as a rectangle, wherein the winding segment 14 shown in the left bottom left is still shown in several winding layers 18 of a strip conductor. Each winding layer is surrounded by an insulating layer so as to be able to isolate a voltage difference at least to the adjacent winding layer. Depending on the embodiment of the winding, the insulation is also designed to nominal voltage. Depending on the design, such a strip conductor has a width of several centimeters to, for example, just under two meters, wherein the number of winding layers clearly exceeds the four layers shown here, for example several 10 layers. Due to the arrangement around the common 16 each winding segment 12, 14 has an approximately hollow cylindrical configuration.
Zwischen den radial aneinandergrenzenden Wicklungsmodulen ist ein sich über die gesamte axiale Länge der Wicklung erstreckender Kühlkanal angeordnet, welcher beispielsweise überwiegend aus einem isolierendem Kunststoffmaterial hergestellt sein kann und welcher mit dem Bezugspfeil 22 angedeutet ist. Ein derartiger Kühlkanal kann beispielsweise aus Schalensegmenten gefertigt sein, welche in zusammengesetzter Form zwei ineinander verschachtelte Hohlzylinder ergeben, wobei der eigentliche Kühlkanal durch den von den Hohlzylindern umschlossenen Innenraum gebildet ist. Aus statischen Gründen sind die Hohlzylinder gegeneinander mit geeigneten vorzugsweise in axialer Richtung ausgerichteten Elementen zu beabstanden, beispielsweise durch Stege. Zwei der elektrischen Anschlüsse der Wicklungsmodule 14 des zweiten Wicklungssegments sind über Verbindungsleiter 26 platzsparend im Inneren des Kühlkanals 22 an die obere Stirnseite der Bandwicklung geführt. Dort sind sie an Verbindungsstellen 24, beispielsweise mittels einer Schraubenverbindung, elektrisch mit Anschlüssen der Wicklungsmodule 12 des ersten Wicklungssegments verbunden. Die jeweiligen anderen elektrischen Anschlüsse der beiden Wicklungsmodule 14 sind an der gegenüberliegenden Stirnseite mit einem Verbindungsleiter 28 miteinander verbunden, so dass alle vier Wicklungsmodule elektrisch in Reihe geschaltet sind. Radial außen ist eine Hochspannungswicklung 30 angedeutet, welche durch einen Streukanal 32 beabstandet um die radial äußeren Wicklungsmodule angeordnet ist. Der Streukanal 32 ist bedarfsweise ebenfalls geeignet, in diesem zumindest abschnittsweise Verbindungsleiter 26 an eine der beiden Stirnseiten der Wicklung zu führen. Arranged between the radially adjacent winding modules is a cooling channel extending over the entire axial length of the winding, which, for example, can be made predominantly of an insulating plastic material and which is indicated by the reference arrow 22. Such a cooling channel may for example be made of shell segments, which result in a composite form two nested hollow cylinder, wherein the actual cooling channel is formed by the enclosed by the hollow cylinders interior. For static reasons, the hollow cylinders are to be spaced from each other with suitable preferably oriented in the axial direction elements, for example by webs. Two of the electrical connections of the winding modules 14 of the second winding segment are guided via connecting conductor 26 to save space in the interior of the cooling channel 22 to the upper end side of the tape winding. There they are at connection points 24, for example by means of a screw connection, electrically connected to terminals of the winding modules 12 of the first winding segment. The respective other electrical connections of the two winding modules 14 are connected to each other at the opposite end side with a connecting conductor 28, so that all four winding modules are electrically connected in series. Radially outside a high-voltage winding 30 is indicated, which is arranged by a stray channel 32 spaced around the radially outer winding modules. If required, the stray channel 32 is likewise suitable for conducting connecting conductor 26, at least in sections, to one of the two end faces of the winding.
Fig. 2 zeigt eine Draufsicht 40 auf zweite exemplarische Bandwicklung. In dieser Ansicht wird noch einmal die hohlzylindrische Ausprägung von um eine Rotationsachse 42 angeordneten Wicklungsmodulen 44, 48 deutlich, zwischen denen ein ebenfalls hohlzylindrischer Kühlkanal 48 angedeutet ist. Innerhalb dieses Kühlkanals sind mit den Bezugsziffern 50, 52 zwei stangenähnliche Verbindungsleiter mit einem quadratischen Querschnitt angedeutet. Mit diesen ist eine elektrische Verbindung von - in dieser Fig. nicht erkennbaren - axial aneinandergrenzenden Wicklungsmodulen ermöglicht. Fig. 2 shows a plan view 40 on second exemplary tape winding. In this view, once again the hollow cylindrical shape of arranged around a rotation axis 42 winding modules 44, 48 clearly, between which a likewise hollow cylindrical cooling channel 48 is indicated. Within this cooling channel, the reference numerals 50, 52 indicate two rod-like connecting conductors with a square cross-section. With these an electrical connection of - in this Fig. Not recognizable - axially adjacent winding modules allows.
Fig. 3 zeigt einen Schnitt 60 durch eine dritte exemplarische Bandwicklung. Diese ist vom Aufbau her der in Fig. 1 gezeigten Wicklung sehr ähnlich, jedoch sind insgesamt acht Wicklungsmodule 64 in zwei Wicklungssegmenten vorgesehen, wobei insgesamt drei Kühlkanäle 62 gebildet sind. Eine Führung von Verbindungsleitern ist in diesem Beispiel jedoch nur im radial inneren und im radial äußeren Kühlkanal notwendig. Eine Oberspannungswicklung ist nicht gezeigt, jedoch als radial außen vorhanden anzusehen. Fig. 3 shows a section 60 through a third exemplary tape winding. This is very similar in structure to the winding shown in Fig. 1, but a total of eight winding modules 64 are provided in two winding segments, wherein a total of three cooling channels 62 are formed. However, a guide of connecting conductors is necessary in this example only in the radially inner and in the radially outer cooling channel. A high-voltage winding is not shown, but to be considered as radially outside available.
Fig. 4 zeigt einen Schnitt 70 durch eine vierte exemplarische Bandwicklung, bei welcher insgesamt sechs Wicklungsmodule in drei Wicklungssegmenten vorgesehen sind. Die elektrische Verbindung des axial mittleren Wicklungssegmentes erfolgt an Verbindungsstellen, welche teilweise nicht an einer der Stirnflächen liegen. Dies erfordert eine zusätzliche Beachtung bei der Abfolge des Wickelvorgangs der jeweiligen Wickelmodule, welcher hierdurch etwas aufwändiger wird. 4 shows a section 70 through a fourth exemplary band winding, in which a total of six winding modules are provided in three winding segments. The electrical connection of the axially middle winding segment takes place at connection points, which are partially not on one of the end faces. This requires additional attention in the sequence of the winding process of the respective winding modules, which is thereby somewhat more complex.
Fig. 5 zeigt eine weitere erfindungsgemäße Variante in Form eines Schnittes 80 durch eine fünfte exemplarische Bandwicklung, diesmal mit sechs Wicklungsmodulen, zwei Wicklungssegmenten und zwei Kühlkanälen. Bei der Verschaltung der jeweiligen Wicklungsmodule ist gut zu sehen, dass deren jeweiliger Wickelsinn zu be- achten ist, so dass sich die in die Wicklungsmodule induzierten Spannungen nicht gegenseitig aufheben. 5 shows a further variant according to the invention in the form of a section 80 through a fifth exemplary band winding, this time with six winding modules, two winding segments and two cooling channels. When connecting the respective winding modules, it is easy to see that their respective winding sense can be so that the voltages induced in the winding modules do not cancel each other out.
Fig. 6 zeigt eine Seitenansicht 90 auf dreiphasigen Transformator mit Bandwicklung. Es sind insgesamt drei gemeinsame Spulenkörper 96, 98, 100 vorgesehen, welche jeweils radial innen liegend eine unterspannungsseitige Bandwicklung und radial außen liegend eine oberspannungsseitige Rund- oder Rechteckmaterialwicklung aufweisen, was aus dieser Darstellung jedoch nicht hervorgeht. Jeder der drei Spulenkörper ist längs einer jeweiligen Wickelachse 92 um einen jeweiligen Schenkel eines dreiphasigen Transformatorkerns 94 angeordnet. Durch die erfindungsgemäße Anordnung von Verbindungsleitern in Kühlkanälen - beides in der Fig. nicht angedeutet - sinkt die Baugröße des Transformators bzw. ist bei gleicher Baugröße eine erhöhte Nennleistung ermöglicht. Fig. 6 shows a side view 90 on three-phase transformer with tape winding. There are a total of three common bobbins 96, 98, 100 are provided, which in each case radially inwardly lying underneath a band-side tape winding and radially outboard have a top-side round or rectangular material winding, which does not emerge from this illustration. Each of the three bobbins is disposed along a respective winding axis 92 about a respective leg of a three-phase transformer core 94. The inventive arrangement of connecting conductors in cooling channels - both in the figure not indicated - decreases the size of the transformer or is at the same size increased power rating possible.
Bezugszeichenliste Schnitt durch eine erste exemplarische Bandwicklung Cross-section through a first exemplary tape winding
Wicklungsmodule eines ersten Wicklungssegmentes Winding modules of a first winding segment
Wicklungsmodule eines zweiten Wicklungssegmentes Winding modules of a second winding segment
Wickelachse winding axis
Wickellagen eines Bandleiters Winding layers of a strip conductor
radiale Erstreckung der Bandwicklung radial extent of the tape winding
Kühlkanal cooling channel
Verbindungsstelle an erster Stirnseite Joint at the first end
Verbindungsleiter connecting conductors
Verbindungsleiter an zweiter Stirnseite Connecting conductor on second end face
Oberspannungswicklung High-voltage winding
Streukanal scatter channel
Draufsicht auf zweite exemplarische Bandwicklung Top view on second exemplary tape winding
Wickelachse winding axis
erstes Wicklungsmodul first winding module
zweites Wicklungsmodul second winding module
Kühlkanal cooling channel
erster im Kühlkanal geführter Verbindungsleiter first in the cooling channel led connection conductor
zweiter im Kühlkanal geführter Verbindungsleiter second in the cooling channel led connection conductor
Schnitt durch eine dritte exemplarische Bandwicklung Cut through a third exemplary tape winding
Kühlkanäle cooling channels
Wicklungsmodule winding modules
Wickelachse winding axis
Schnitt durch eine vierte exemplarische Bandwicklung Section through a fourth exemplary tape winding
Schnitt durch eine fünfte exemplarische Bandwicklung Section through a fifth exemplary tape winding
Seitenansicht auf dreiphasigen Transformator mit Bandwicklung Wickelachsen Side view on three-phase transformer with band winding winding axes
Transformatorkern transformer core
erste Unterspannungswicklung mit erster Oberspannungswicklung zweite Unterspannungswicklung mit zweiter Oberspannungswicklung dritte Unterspannungswicklung mit dritter Oberspannungswicklung first low-voltage winding with first high-voltage winding second low-voltage winding with second high-voltage winding third low-voltage winding with third high-voltage winding

Claims

Patentansprüche claims
1. Bandwicklung (10, 40, 60, 70, 80) für einen Transformator (90), umfassend mehrere Wicklungsmodule (12, 14, 44, 46, 64) mit jeweils einem um eine Wickelachse (16, 42, 66, 92) gewickelten Bandleiter (18), wobei durch wenigstens zwei radial benachbarte Wicklungsmodule (12, 14, 44, 46, 64) ein Wicklungssegment gebildet ist, wobei zwischen wenigstens zwei radial benachbarten (20) Wicklungsmodulen (12, 14, 44, 46, 64) wenigstens ein in axialer (16, 42, 66, 92) Richtung verlaufender Kühlkanal (22, 48, 62) vorgesehen ist, wobei wenigstens zwei axial (16, 42, 66, 92) benachbarte Wicklungssegmente vorgesehen sind, wobei die Wicklungsmodule (12, 14, 44, 46, 64) durch Verbindungsleiter (26, 50, 52) elektrisch in Reihe geschaltet sind, dadurch gekennzeichnet. A tape winding (10, 40, 60, 70, 80) for a transformer (90), comprising a plurality of winding modules (12, 14, 44, 46, 64), each with a winding axis about (16, 42, 66, 92) wound strip conductor (18), wherein a winding segment is formed by at least two radially adjacent winding modules (12, 14, 44, 46, 64), wherein between at least two radially adjacent (20) winding modules (12, 14, 44, 46, 64) at least one cooling channel (22, 48, 62) running in the axial (16, 42, 66, 92) direction is provided, at least two winding segments being provided axially (16, 42, 66, 92), the winding modules (12, 14, 44, 46, 64) are electrically connected in series by connecting conductors (26, 50, 52), characterized.
dass wenigstens ein Verbindungsleiter (26, 50, 52) zumindest abschnittsweise längs der axialen (16, 42, 66, 92) Erstreckung des Kühlkanals (22, 48, 62) durch diesen geführt ist. in that at least one connecting conductor (26, 50, 52) is guided at least in sections along the axial (16, 42, 66, 92) extent of the cooling channel (22, 48, 62) through the latter.
2. Bandwicklung nach Anspruch 1 , dadurch gekennzeichnet, dass als durch den Kühlkanal (22, 48, 62) geführter Verbindungsleiter (26, 50, 52) eine Ausleitungsschiene vorgesehen ist. 2. tape winding according to claim 1, characterized in that as by the cooling channel (22, 48, 62) guided connecting conductor (26, 50, 52) a discharge rail is provided.
3. Bandwicklung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass wenigstens zwei Verbindungsleiter (26, 50, 52) an einer Stirnfläche der Bandwicklung elektrisch verbunden (24, 28) sind. 3. tape winding according to one of claims 1 or 2, characterized in that at least two connecting conductors (26, 50, 52) on an end face of the tape winding electrically connected (24, 28).
4. Transformator (90) umfassend einen Transformatorkern (94), wenigstens eine Bandwicklung nach einem der Ansprüche 1 - 3 als Unterspannungswicklung und wenigstens eine weitere galvanisch getrennte Wicklung als Oberspannungswicklung. 4. Transformer (90) comprising a transformer core (94), at least one tape winding according to one of claims 1 - 3 as a low-voltage winding and at least one further galvanically isolated winding as a high-voltage winding.
5. Transformator nach Anspruch 4, dadurch gekennzeichnet, dass dieser dreiphasig ausgeführt ist. 5. Transformer according to claim 4, characterized in that it is designed in three phases.
PCT/EP2011/003569 2010-09-01 2011-07-18 Cooled transformer having at least one strip winding WO2012028222A1 (en)

Priority Applications (4)

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BR112013005110A BR112013005110A2 (en) 2010-09-01 2011-07-18 cooled transformer with at least one strap winding
CA2809897A CA2809897A1 (en) 2010-09-01 2011-07-18 Cooled transformer having at least one strip winding
CN2011800423481A CN103168331A (en) 2010-09-01 2011-07-18 Cooled transformer having at least one strip winding
US13/780,519 US20130176092A1 (en) 2010-09-01 2013-02-28 Cooled transformer having at least one strip winding

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EP1009063.8 2010-09-01
EP10009063A EP2426680A1 (en) 2010-09-01 2010-09-01 Cooled transformer having at least one ribbon coil

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CN108878116B (en) * 2018-06-29 2020-08-18 常德国力变压器有限公司 Wire outgoing method and wire connecting method for railway transformer winding

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GB854564A (en) * 1958-01-15 1960-11-23 Gen Electric Improvements in coil structure for electrical apparatus
DE7126814U (en) * 1971-07-13 1972-03-16 Transformatoren Union Ag WINDING FOR TRANSFORMERS, REACTOR COILS AND THE LIKE.

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DE102017223316A1 (en) * 2017-12-20 2019-06-27 Siemens Aktiengesellschaft coil assembly
US11626242B2 (en) 2017-12-20 2023-04-11 Siemens Energy Global GmbH & Co. KG Winding assembly

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