EP2428967B1 - Enroulement de transformateur - Google Patents

Enroulement de transformateur Download PDF

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Publication number
EP2428967B1
EP2428967B1 EP10175699.7A EP10175699A EP2428967B1 EP 2428967 B1 EP2428967 B1 EP 2428967B1 EP 10175699 A EP10175699 A EP 10175699A EP 2428967 B1 EP2428967 B1 EP 2428967B1
Authority
EP
European Patent Office
Prior art keywords
winding
transformer
cooling channel
modules
electrical shield
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.)
Active
Application number
EP10175699.7A
Other languages
German (de)
English (en)
Other versions
EP2428967A1 (fr
Inventor
Marcos Bockholt
Frank Cornelius
Burak Esenlik
Bhavesh Patel
Jens Tepper
Benjamin Weber
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.)
ABB Technology AG
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
Priority to EP10175699.7A priority Critical patent/EP2428967B1/fr
Application filed by ABB Technology AG filed Critical ABB Technology AG
Priority to PL10175699T priority patent/PL2428967T3/pl
Priority to ES10175699T priority patent/ES2406408T3/es
Priority to PCT/EP2011/003669 priority patent/WO2012031646A1/fr
Priority to CN201180043376.5A priority patent/CN103125003B/zh
Priority to CA2810416A priority patent/CA2810416C/fr
Priority to BR112013005274-0A priority patent/BR112013005274B1/pt
Publication of EP2428967A1 publication Critical patent/EP2428967A1/fr
Priority to US13/785,306 priority patent/US8952777B2/en
Application granted granted Critical
Publication of EP2428967B1 publication Critical patent/EP2428967B1/fr
Active 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
    • H01F27/08—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
    • H01F27/288—Shielding
    • H01F27/2885—Shielding with shields or electrodes
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/363—Electric or magnetic shields or screens made of electrically conductive material

Definitions

  • the invention relates to a transformer winding, with at least two hollow cylindrical nested around a common winding axis extending electrically connected in series multi-layer winding modules and at least one cooling channel, which is arranged along the same winding axis hollow cylindrical between the winding modules.
  • Such a winding is for example off WO 2006/103193 known.
  • power transformers for example, with a rated power of a few MVA and in a voltage range of, for example, 5kV to 30kV or 110kV, sometimes even up to 170kV, are also designed as dry-type transformers, wherein in the latter voltage range well rated power of 50MVA and are possible about it.
  • a loss of heat arises in its electrical windings, which is dissipated to the environment. Therefore, for cooling purposes of such a dry transformer usually at least one guided along the axial extent of the winding cooling channel is pronounced to lead out the heat loss preferably by means of natural air cooling from the winding interior.
  • the usually radially inwardly located lower voltage winding is divided into a plurality of radially spaced and electrically connected in series hollow cylindrical winding segments, between which a likewise hollow cylindrical cooling channel is arranged.
  • This effect is particularly important in the case of a surge voltage load of the winding, that is to say in the case of an incoming voltage pulse from outside to the terminals of the winding, for example with a rise time in the ⁇ s range. Due to the high-frequency fundamental portion of such a voltage pulse, the voltage along the individual turns of the winding distributed according to their respective capacity. Since the capacity is now distributed unevenly due to the introduction of the cooling channel, there is also a disadvantageous uneven stress on the conductor, which is usually designed over its entire length for the same voltage stress.
  • a transformer winding of the aforementioned type is characterized in that within the at least one cooling channel at least in sections along its radial circumference is provided over approximately the entire axial length extending planar electric screen, through which the electrical capacitance distribution in the electrical series connected transformer winding is uniform.
  • the basic idea of the invention is to provide the hollow-cylindrical interior of the at least one cooling channel, which generally extends over the entire axial length of the transformer winding, with a respective inner, electrically conductive screen, so that, on the one hand, the capacitive properties of others Windings, which would be provided there without the presence of a cooling channel, are approximately at least partially replicated.
  • the respective screen is to be designed in such a way that the cooling function of the cooling channel is not adversely affected, or in the ideal case even improved.
  • This is achieved by a preferably flat, plate-like configuration of the respective screen, which is arranged along the axial extent of the cooling channel.
  • An example of this is a metal sheet which, for example, rolled in a cylindrical shape, is to be provided in the cooling channel.
  • a respective breakthrough to allow there the required spacing of the two radially adjacent winding modules, for example by webs or blocks.
  • a cylindrical shell-like segmentation of a screen is conceivable.
  • the at least one cooling channel has a radially inner and a radially outer wall, through which a channel cavity is enclosed, wherein at least one of the two wall facing the cavity side, an electrical screen is arranged.
  • Such the channel cavity enclosing walls are on the one hand not unusual in the design of a cooling channel, even if no additional electrical screens are provided in this.
  • a cooling channel can be produced by nesting two pieces of pipe from an insulating material with additional radial spacing in an advantageously simple manner.
  • a respective electrical screen must accordingly be provided without problems on at least one of the two sides facing the inner cooling channel.
  • a sheet-like screen and the painting of the respective wall side with a conductive paint material is conceivable.
  • a further arrangement of a screen - for example, in the radial center of the cooling channel - advantageous to achieve a homogeneous distribution of capacity.
  • Such a centrally mounted screen also advantageously increases the interaction surface with the cooling medium flowing through the cooling channel air and the cooling effect is thereby improved.
  • the at least one electrical shield is galvanically connected to a radially adjacent winding layer. This has a positive effect on the potential distribution in the event of an impulse voltage load but also on the voltage stress of the conductors in steady-state operation at mains frequency, depending on the further configuration of the winding.
  • the at least one electrical shield is arranged parallel to the winding axis.
  • the potential distribution along the axial length of the winding in each winding position is constant, therefore, also the orientation of the electric screen oriented parallel to the winding axis and oriented towards an expected potential distribution in the case of a surge stress situation must be selected.
  • This also proves to be the least influencing thedemittehne thanks through the cooling channel arrangement variant.
  • the at least one electric screen is arranged obliquely to the winding axis corresponding to an expected electric potential distribution.
  • a voltage gradient is present along the axial extent of the transformer winding, which is then taken into account by a corresponding oblique arrangement of the screen.
  • this is to be designed such that the air flow through the cooling channel is influenced as little as possible.
  • a plurality of axially adjacent winding modules with a cooling channel and a planar electric screen are provided.
  • axial segmentation is the assembly - in particular of larger windings of, for example 10MVA power and higher, much easier.
  • the cooling channels are usually designed such that they are guided along the common axial extent of all axially adjacent winding modules.
  • two galvanically isolated windings are provided for each different nominal voltages. This is the case, for example, when a low-voltage winding and a high-voltage winding are arranged on the same bobbin.
  • the low-voltage winding for example, for a rated voltage of 10kV, arranged radially inward
  • the high-voltage winding for example, for a rated voltage of 30kV, radially outward.
  • Each of these galvanically isolated windings can be constructed according to the invention of winding modules with interposed cooling channels with respective electrical screen.
  • the advantages of a transformer winding according to the invention are also apparent for a transformer with transformer core and at least one, but preferably three transformer windings. This allows use in a three-phase power supply network.
  • Fig. 1 shows a top view 10 of a first exemplary transformer winding.
  • a hollow-cylindrical first winding module 12 Disposed about a common winding axis 18 is a hollow-cylindrical first winding module 12, which comprises, for example, a plurality of layers of a strip conductor wound on one another.
  • a radially inner wall 26 and a radially outer wall 28 connects, which are radially spaced apart by spacer blocks 30.
  • Between the two insulating walls 26, 28 of the actual cooling channel 16 is formed, which is cooled during operation of the winding, for example, as part of a three-phase transformer by flowing from bottom to top air.
  • two cylindrical electrical screens 20, 22 are indicated, which consist for example predominantly of a suitable conductive sheet material. In order to attach the spacer blocks 30 between the walls 26, 28, an at least partial breakdown of the electrical screens 20, 22 is necessary.
  • a second winding module 14 connects, which likewise has a plurality of layers of an electrical conductor, which, however, are not indicated in the figure.
  • An electrical series connection of the two winding parts is indicated by a series circuit element 24, for example an aluminum profile or a conductor segment guided radially through the cooling channel.
  • the heat emitted by the winding modules during operation heat is transmitted through the walls 26, 28 in the cooling channel 16 and also radiates to the electric screens 20, 22 a.
  • the air flow through the cooling channel 16 is not adversely affected by the arrangement of the electric screens 20, 22, it is even achieved an improved cooling effect. Namely, the thermal radiation also heats the two electric screens 20, 22, which then form an increased exchange surface for the heat exchange with the cooling air.
  • further further cooling channels, which follow radially outside, and further winding modules connected radially on the outside are conceivable.
  • Fig. 2 shows a sectional view 40 through a second exemplary transformer winding.
  • a third winding module 42 Arranged radially inward around a common winding axis 50 are a third winding module 42 and an axially adjacent fourth winding module 44, for example with a plurality of turns of an insulated copper wire.
  • a cooling channel 52 Radially outside, a cooling channel 52 connects, which is guided over the entire axial length of the axially adjacent winding modules 42, 44.
  • an electrical screen 54 is arranged radially inward, over the axial length of both winding modules 42, 44, wherein radially in the cooling channel 52 a two-part screen 56, 58 is arranged.
  • Both shield parts 56, 58 correspond in their axial extent to the axial extent of winding modules 46, 48 which adjoin each other radially on the outside of the cooling channel 52 and are axially adjacent to each other. All four winding modules 42, 44, 46, 48 are electrically connected in series. Depending on the type of series connection or according to the structural boundary conditions, a division of the radially outer screen into a first 56 and a second 58 screen part may be useful. It is usually assumed that all radially inner winding modules 42, 44 are connected in series and then a series connection with the radially outer winding modules 46, 48 takes place.
  • Fig. 3 shows a partial sectional view 60 through a third exemplary transformer winding.
  • a common winding axis 62 Arranged around a common winding axis 62 is a radially inwardly lying hollow-cylindrical seventh winding module 64, which is adjoined radially on the outside by a hollow-cylindrical cooling channel 68 and a hollow-cylindrical eighth winding module 68.
  • the two winding modules 64, 66 are indicated as a strip conductor winding with a single turn of a strip conductor 70 per winding layer and with several winding layers.
  • Indicated inside the cooling channel 68 are two electrical screens 72, 74, which extend parallel to the winding axis 62 and along almost the entire axial length of the winding modules 64, 66.
  • the electrical screens 72, 74 are also to be arranged in parallel, wherein both screens 72, 74 are electrically connected to the respective adjacent position of the strip conductor 70 via connecting elements 76.
  • the radial gap between the two cooling channel 68 radially surrounding band conductor turns is electrically reduced, whereby an increase in the capacity is reached.
  • Fig. 4 shows a partial sectional view 80 through a fourth exemplary transformer winding.
  • two hollow-cylindrical winding modules nested one inside the other are arranged around a common winding axis 82, wherein a winding layer now comprises a plurality of adjacent turns 84 or 88 of a round conductor.
  • a cooling channel 90 Arranged radially between the winding modules is a cooling channel 90 with two electrical shields 92, 94. Due to the multiple turns per winding layer, no potential distribution is to be expected in the case of a surge voltage load which is constant along the axial extent of the winding modules.
  • the electric umbrellas 92, 94 are slightly angled, for example, 1 ° - 10 ° to the winding axis 82, arranged so as to ensure the most homogeneous possible stress distribution.
  • the arrangement of winding modules and cooling channels around a common axis of rotation does not necessarily have to be circular, it is possible with regard to transformer legs, which may only be approximately circular, to adapt the shape of the winding accordingly and, if necessary, to approximate a rectangle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)

Claims (9)

  1. Enroulement de transformateur (10, 40, 60, 80), avec au moins deux modules d'enroulement (12, 14, 42, 44, 46, 48, 64, 66) à plusieurs couches s'emboîtant les uns dans les autres, connectés (24) en série sur le plan électrique et s'étendant autour d'un axe d'enroulement (18, 50, 62, 82) commun, avec au moins un canal de refroidissement (16, 52, 68, 90) disposé le long du même axe d'enroulement (18, 50, 62, 82) en forme de cylindre creux entre les modules d'enroulement (12, 14, 42, 44, 46, 48, 64, 66), caractérisé en ce qu'un écran électrique (20, 22, 54, 56, 58, 72, 74, 92, 94) s'étendant approximativement sur toute la longueur axiale est prévu à l'intérieur de l'au moins un canal de refroidissement (16, 52, 68, 90), au moins par endroits le long de sa périphérie radiale, à travers lequel la capacité électrique est répartie de façon régulière dans l'enroulement de transformateur connecté en série sur le plan électrique.
  2. Enroulement de transformateur selon la revendication 1, caractérisé en ce que le canal de refroidissement (16, 52, 68, 90) comporte une paroi (26) intérieure dans le plan radial et une paroi (28) extérieure dans le plan radial entourant un espace creux de canal et qu'un écran électrique (20, 22, 54, 56, 58, 72, 74, 92, 94) est disposé au niveau d'au moins un des deux côtés de paroi orientés vers l'espace creux.
  3. Enroulement de transformateur selon l'une quelconque des revendications 1 ou 2, caractérisé en ce qu'au moins un écran électrique (20, 22, 54, 56, 58, 72, 74, 92, 94) est relié (76) sur le plan galvanique à une position d'enroulement connexe dans le plan radial.
  4. Enroulement de transformateur selon l'une quelconque des revendications précédentes, caractérisé en ce que l'enroulement de transformateur prend la forme d'un enroulement de conducteur en bande (70) avec un enroulement par position d'enroulement et que l'au moins un écran électrique (20, 22, 54, 56, 58, 72, 74, 92, 94) est disposé parallèlement à l'axe d'enroulement (18, 50, 62, 82).
  5. Enroulement de transformateur selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les modules d'enroulement (12, 14, 42, 44, 46, 48, 64, 66) sont réalisés avec plusieurs enroulements (84, 88), reposant côte à côte dans le plan axial, par position d'enroulement et que l'au moins un écran électrique (92, 94) est disposé de façon inclinée par rapport à l'axe d'enroulement (18, 50, 62, 82) en fonction d'une répartition de potentiel électrique attendue.
  6. Enroulement de transformateur selon l'une quelconque des revendications précédentes, caractérisé en ce que plusieurs modules d'enroulement (12, 14, 42, 44, 46, 48, 64, 66) connexes les uns par rapport aux autres dans le plan radial sont pourvus d'un canal de refroidissement (16, 52, 68, 90) et d'un écran électrique plat (20, 22, 54, 56, 58, 72, 74, 92, 94).
  7. Enroulement de transformateur selon la revendication 6, caractérisé en ce qu'au moins un canal de refroidissement (52) commun s'étend sur la totalité de la longueur axiale des modules d'enroulement connexes dans le plan radial et qu'au moins un écran électrique plat (54) est prévu le long de la totalité de la longueur axiale du canal de refroidissement (52).
  8. Enroulement de transformateur selon l'une quelconque des revendications précédentes, caractérisé en ce que deux enroulements séparés sur le plan galvanique sont prévus pour respectivement deux tensions nominales différentes.
  9. Transformateur, comprenant un coeur de transformateur et au moins un enroulement de transformateur selon la revendication 8.
EP10175699.7A 2010-09-08 2010-09-08 Enroulement de transformateur Active EP2428967B1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
PL10175699T PL2428967T3 (pl) 2010-09-08 2010-09-08 Uzwojenie transformatora
ES10175699T ES2406408T3 (es) 2010-09-08 2010-09-08 Arrollamiento de transformador
EP10175699.7A EP2428967B1 (fr) 2010-09-08 2010-09-08 Enroulement de transformateur
CN201180043376.5A CN103125003B (zh) 2010-09-08 2011-07-22 变压器线圈
PCT/EP2011/003669 WO2012031646A1 (fr) 2010-09-08 2011-07-22 Enroulement de transformateur
CA2810416A CA2810416C (fr) 2010-09-08 2011-07-22 Enroulement de transformateur
BR112013005274-0A BR112013005274B1 (pt) 2010-09-08 2011-07-22 enrolamento de transformador de potência e transformador
US13/785,306 US8952777B2 (en) 2010-09-08 2013-03-05 Transformer winding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10175699.7A EP2428967B1 (fr) 2010-09-08 2010-09-08 Enroulement de transformateur

Publications (2)

Publication Number Publication Date
EP2428967A1 EP2428967A1 (fr) 2012-03-14
EP2428967B1 true EP2428967B1 (fr) 2013-04-17

Family

ID=42989221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10175699.7A Active EP2428967B1 (fr) 2010-09-08 2010-09-08 Enroulement de transformateur

Country Status (8)

Country Link
US (1) US8952777B2 (fr)
EP (1) EP2428967B1 (fr)
CN (1) CN103125003B (fr)
BR (1) BR112013005274B1 (fr)
CA (1) CA2810416C (fr)
ES (1) ES2406408T3 (fr)
PL (1) PL2428967T3 (fr)
WO (1) WO2012031646A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6075784B2 (ja) * 2012-12-28 2017-02-08 株式会社神戸製鋼所 バスバー及びバスバーモジュール、並びにバスバーの製造方法
EP2833378B1 (fr) * 2013-07-31 2016-04-20 ABB Technology AG Transformateur
EP2869313B1 (fr) * 2013-10-29 2017-05-31 ABB Schweiz AG Bobine de transformateur à sec et transformateur à sec
CN104064334A (zh) * 2014-07-09 2014-09-24 伊戈尔电气股份有限公司 一种变压器高低压线圈主油道用接地屏
ES2798303T3 (es) * 2014-10-07 2020-12-10 Abb Power Grids Switzerland Ag Transformador para vehículo
US11143459B1 (en) * 2017-04-04 2021-10-12 Mainstream Engineering Corporation Advanced cooling system using throttled internal cooling passage flow for a window assembly, and methods of fabrication and use thereof
CN211830218U (zh) * 2017-05-02 2020-10-30 西门子股份公司 用于电能传输线处无功功率补偿的布置和电力传输系统
DE102018120181A1 (de) * 2018-08-20 2020-03-05 Ebm-Papst Mulfingen Gmbh & Co. Kg Vorrichtung zur Reduzierung hochfrequenter Störungen eines Transformators
JP2021019206A (ja) * 2019-07-23 2021-02-15 ソーラーエッジ テクノロジーズ リミテッド 変圧器
EP3770929A1 (fr) * 2019-07-26 2021-01-27 ABB Power Grids Switzerland AG Système de refroidissement de transformateur

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Publication number Priority date Publication date Assignee Title
US2553324A (en) * 1949-07-27 1951-05-15 Gen Electric Wide band audio and video transformer
GB829983A (en) * 1957-05-28 1960-03-09 Smit & Willem & Co Nv Improvements in and relating to transformers or choking coils
DE1258966B (de) * 1964-04-27 1968-01-18 May & Christe Ges Mit Beschrae Luftgekuehlter Kunststofftransformator
DE3243595C2 (de) * 1982-11-25 1985-10-17 Smit Transformatoren B.V., Nijmegen Wicklungsanordnung für einen gasgekühlten Transformator
NL8901961A (nl) * 1989-07-28 1991-02-18 Koninkl Philips Electronics Nv Generator voor het opwekken van een elektrische spanning.
CN2617016Y (zh) * 2003-05-16 2004-05-19 司峰电子股份有限公司 变压器
DE102005015785A1 (de) * 2005-04-01 2006-11-16 Siemens Ag Transformator mit elektrischer Abschirmung
US8779882B2 (en) * 2009-09-30 2014-07-15 Astec International Limited Center tapped transformers for isolated power converters

Also Published As

Publication number Publication date
US20130181796A1 (en) 2013-07-18
BR112013005274B1 (pt) 2020-10-27
CN103125003A (zh) 2013-05-29
US8952777B2 (en) 2015-02-10
ES2406408T3 (es) 2013-06-06
WO2012031646A1 (fr) 2012-03-15
CA2810416A1 (fr) 2012-03-15
BR112013005274A2 (pt) 2017-07-04
CN103125003B (zh) 2016-11-16
EP2428967A1 (fr) 2012-03-14
CA2810416C (fr) 2017-10-03
PL2428967T3 (pl) 2013-10-31

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