EP2869313B1 - Bobine de transformateur à sec et transformateur à sec - Google Patents

Bobine de transformateur à sec et transformateur à sec Download PDF

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Publication number
EP2869313B1
EP2869313B1 EP13005136.0A EP13005136A EP2869313B1 EP 2869313 B1 EP2869313 B1 EP 2869313B1 EP 13005136 A EP13005136 A EP 13005136A EP 2869313 B1 EP2869313 B1 EP 2869313B1
Authority
EP
European Patent Office
Prior art keywords
dry
type transformer
coil
radially
transformer
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
EP13005136.0A
Other languages
German (de)
English (en)
Other versions
EP2869313A1 (fr
Inventor
Martin Carlen
Benjamin Weber
Jens Tepper
Frank Cornelius
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 Schweiz AG
Original Assignee
ABB Schweiz 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 Schweiz AG filed Critical ABB Schweiz AG
Priority to ES13005136.0T priority Critical patent/ES2639111T3/es
Priority to EP13005136.0A priority patent/EP2869313B1/fr
Priority to PCT/EP2014/071714 priority patent/WO2015062838A1/fr
Publication of EP2869313A1 publication Critical patent/EP2869313A1/fr
Application granted granted Critical
Publication of EP2869313B1 publication Critical patent/EP2869313B1/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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/38—Auxiliary core members; Auxiliary coils or windings
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/12—Two-phase, three-phase or polyphase transformers

Definitions

  • the invention relates to a dry-type transformer coil comprising a hollow-cylindrical coil with at least one radially inner and one radially outer winding.
  • the invention also relates to a dry type transformer comprising a transformer core having at least two core legs.
  • dry-type transformers for example in the rated voltage range of 6 kV, 10 kV, 20 kV, 30 kV, do without a special insulation medium such as oil.
  • a special insulation medium such as oil.
  • their construction can be simplified on the one hand in an advantageous manner.
  • the use of air as an insulating medium due to their limited isolation ability increased insulation distances to live components.
  • appropriate coolant for removing the heat loss occurring during operation of the dry transformer are provided, for example, axially extending cooling channels, which are usually arranged between radially adjacent winding segments.
  • the patent document WO 2009/126977 discloses an electrostatic shield for an HVDC air choke, characterized by a jacket provided at at least one end with a substantially circumferential electrode collector electrode for connection to one of the terminals of the HVDC air choke, the jacket being electrostatically formed from a foil dissipative material is made.
  • a dry-type transformer according to claim 1.
  • the basic idea of the invention is to realize the contact protection of a dry-type transformer coil in that its outer surface is provided with a barrier structure at least on the manually achievable surface areas, which is designed such that the stress load occurring during operation is maintained.
  • a barrier structure at least on the manually achievable surface areas, which is designed such that the stress load occurring during operation is maintained.
  • the structure of the barrier structure of insulating strips and protective wall carried therefrom is the structure of a typically between radially adjacent winding segments of a dry-type transformer coil arranged cooling channel similar and thus particularly easy to integrate into the radial outer surface of the dry-transformer coil.
  • strip material for example, glass fiber reinforced strips of a composite material are suitable, which are ideally arranged along the axial extent of the coil on the radially outer surface.
  • the thereby radially supported barrier wall can, for example, shell-like segments a cylinder made of an insulating material, this simplifies the production in a special way.
  • it is also optionally provided according to the invention at least partially produce the radially supported barrier wall of a wound strip material such as a resin impregnated fiber roving or to fix the optionally present shell-like segments radially outward therewith.
  • Such resin-impregnated fiber rovings which are also known under the name "prepreg” in a dry intermediate state of the resin, are heated to a polymerization temperature after the actual winding process and form a mechanically very strong structure during the cooling process.
  • prepreg axially extending channel-like cavities are formed by the barrier structure, which can be used in an advantageous manner as cooling channels.
  • the electric screen is designed as a metallic shield or as a metallization.
  • a metallic shield for example, the radial outer surface or inner surface of the barrier structure is provided with a conductive sheet or a conductive foil, but it is also possible in principle to wrap such a metallic shield directly into the radially supported barrier wall, for example when using fiber rovings. This advantageously increases the mechanical stability of the dry-type transformer coil according to the invention.
  • a metal layer is applied to the actually electrically insulating radially supported barrier wall, for example by vapor deposition or else the application of a metallically conductive lacquer material.
  • the barrier structure encloses the coil in its entirety.
  • the touching of the entire radial outer surface of the dry transformer coil allows safe. This is especially true of Advantage, if there is no built-around the coil structure of a transformer, which is a contact protection for a portion of the coil surface.
  • the terminals of the radially outer winding are guided on the face side out of the coil.
  • the integrity of the electrical screen is not endangered.
  • the dry-type transformer can be made smaller due to the barrier structure according to the invention than without barrier structure according to the invention, because then significantly fewer areas with critical potential differences are present within the housing.
  • the wall of a housing without additional isolation distance can be built up directly to the radial outer surface of a respective dry-type transformer coil.
  • the dry-type transformer has mechanical components which are earthed and which also constitute a mechanical contact protection for the surface regions of a respective dry-type transformer coil
  • a corresponding barrier structure can in principle also be dispensed with in these surface regions.
  • the electrical screens are designed and electrically connected to one another in such a way that the at least two adjacent dry-type transformer coils are enveloped by the connected screen. As a result, all manually reachable areas of the coil surfaces can be touched without risk.
  • Fig. 1 shows an exemplary inventive dry-type transformer coil 10 in a plan view.
  • the dry-transformer coil 10 comprises a hollow-cylindrical radially inner winding 12 and an adjoining radially outer winding 14, which are nested one inside the other.
  • a barrier structure is arranged completely around the radially outer surface of the coil formed by the windings 12, 14.
  • the barrier structure has a plurality of star-like around the central axis of the coil and along its axial extent extending strips 16, through which a ring-like arranged around this barrier wall 18 is radially supported.
  • the axial length of the barrier wall 18 slightly exceeds the axial length the coil, in order to increase the frontal protection against contact.
  • an electrical shield 20 is metallized, which is connected to ground potential 24.
  • the hollow cylindrical dry-type transformer coil is arranged around a core leg 26 of a transformer core.
  • Fig. 2 shows a first exemplary dry-type transformer 30 in a sectional view.
  • a dry-type transformer coil 32, 34, 36 To three parallel arranged in a common plane core leg of a three-limbed transformer core each have a dry-type transformer coil 32, 34, 36 is arranged.
  • Each dry-transformer coil 32, 34, 36 has a barrier structure with an electric screen, which is not completely formed around the respective dry-transformer coil, but is interrupted in partial regions of mutually facing coil surfaces of adjacent dry-type transformer coils.
  • the electrical shields respectively integrated in the barrier structures are mechanically and electrically connected together to form a grounded shield 44, which surrounds the three dry transformer coils 32, 34, 36 and ensures safe contact with the accessible surface areas of the dry transformer coils 32, 34, 36 is.
  • Fig. 3 shows a second exemplary dry-type transformer 50 in a sectional view. This corresponds essentially to that in the FIG. 2 Dry transformer 30 shown around three parallel in a common plane core leg of a three-leg transformer core, a respective dry-type transformer coil 52, 54, 56 is arranged.
  • Each dry-transformer coil 52, 54, 56 has a separately grounded 64 electric screen 58, 60, 62, which is not fully pronounced around the respective dry-transformer coil, but is interrupted in some areas. Since the electrical screens are not mechanically connected to each other, theoretically contacting of mutually facing coil surfaces of adjacent dry-transformer coils 52, 54, 56 is possible, but unintentional contact is precluded due to the difficult accessibility of the respective surface areas.

Landscapes

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

Claims (5)

  1. Transformateur à sec, comprenant un noyau de transformateur avec au moins deux branches de noyau, selon lequel une bobine de transformateur à sec (10, 32, 34, 36, 52, 54, 56) respective, comprenant une bobine en forme de cylindre creux avec au moins un bobinage étant positionné de manière radiale à l'intérieur (12) et un bobinage étant positionné de manière radiale à l'extérieur (14), est disposée autour d'au moins deux branches de noyau (26), selon lequel, au niveau de la surface radialement extérieure de la bobine de transformateur à sec (10, 32, 34, 36, 52, 54, 56), est prévue une structure formant barrière, laquelle est circonférentielle, tout au moins en partie, et s'étend au moins sur sa longueur axiale, avec au moins une couche de lattes (16) constituées d'un matériau isolant et avec au moins une paroi de barrière (18) soutenue par celles-ci de manière radiale, selon lequel la paroi de la barrière (18) qui se trouve radialement la plus à l'extérieur présente un blindage (20, 42, 58, 60, 62) électrique qui est raccordé à un potentiel de terre (24, 44, 64), caractérisé en ce que
    les blindages (20, 42, 58, 60, 62) électriques d'au moins deux bobines de transformateur à sec (10, 32, 34, 36, 52, 54, 56) adjacentes ne sont pas réalisés dans leur intégralité sur toute leur extension axiale, au niveau de surfaces de bobine (38, 40) se faisant mutuellement face ; et
    caractérisé en ce que
    les blindages (20, 42, 58, 60, 62) électriques sont conçus et raccordés électriquement entre eux, de telle sorte que les au moins deux bobines de transformateur à sec (10, 32, 34, 36, 52, 54, 56) adjacentes sont enfermées à la manière d'une gaine par le blindage (42) raccordé, de telle sorte qu'une protection contre les contacts des surfaces extérieures radiales des bobines de transformateur à sec (10, 32, 34, 36, 52, 54, 56) est réalisée.
  2. Transformateur à sec selon la revendication 1, caractérisé en ce que le blindage (20, 42, 58, 60, 62) électrique est exécuté sous la forme d'un blindage métallique ou sous la forme d'une métallisation.
  3. Transformateur à sec selon l'une des revendications 1 ou 2, caractérisé en ce que tout au moins des parties de la structure formant barrière font saillie par les extrémités axiales de la bobine ayant la forme d'un cylindre creux.
  4. Transformateur à sec selon l'une des revendications précédentes, caractérisé en ce que la structure formant barrière enferme la bobine dans son intégralité.
  5. Transformateur à sec selon l'une des revendications précédentes, caractérisé en ce que les bornes du bobinage (14) radialement extérieur sont guidées hors de la bobine par le côté frontal.
EP13005136.0A 2013-10-29 2013-10-29 Bobine de transformateur à sec et transformateur à sec Active EP2869313B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES13005136.0T ES2639111T3 (es) 2013-10-29 2013-10-29 Bobina de transformador seco y transformador seco
EP13005136.0A EP2869313B1 (fr) 2013-10-29 2013-10-29 Bobine de transformateur à sec et transformateur à sec
PCT/EP2014/071714 WO2015062838A1 (fr) 2013-10-29 2014-10-10 Bobine de transformateur de type sec et transformateur de type sec

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13005136.0A EP2869313B1 (fr) 2013-10-29 2013-10-29 Bobine de transformateur à sec et transformateur à sec

Publications (2)

Publication Number Publication Date
EP2869313A1 EP2869313A1 (fr) 2015-05-06
EP2869313B1 true EP2869313B1 (fr) 2017-05-31

Family

ID=49515155

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13005136.0A Active EP2869313B1 (fr) 2013-10-29 2013-10-29 Bobine de transformateur à sec et transformateur à sec

Country Status (3)

Country Link
EP (1) EP2869313B1 (fr)
ES (1) ES2639111T3 (fr)
WO (1) WO2015062838A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11250990B2 (en) 2017-01-25 2022-02-15 Delta Electronics (Shanghai) Co., Ltd High-voltage transformer and electronic power apparatus
CN206460860U (zh) * 2017-01-25 2017-09-01 台达电子企业管理（上海）有限公司 高压变压器及电子电力装置
US11515080B2 (en) 2017-01-25 2022-11-29 Delta Electronics (Shanghai) Co., Ltd Transformer, coil unit and electronic power apparatus
US11417456B2 (en) 2017-01-25 2022-08-16 Delta Electronics (Shanghai) Co., Ltd High-voltage transformer and electronic power apparatus
CN109215950B (zh) * 2018-11-06 2021-03-12 江西北斗变电科技有限公司 一种提高变压器抗短路能力的支撑结构及实现方法
EP3660874B1 (fr) * 2018-11-29 2022-04-13 Hitachi Energy Switzerland AG Transformateur à sec
CN113808846A (zh) * 2021-11-02 2021-12-17 山东电工电气集团智能电气有限公司 干式变压器线圈绕制方法、干式变压器线圈及干式变压器

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3142029A (en) * 1960-08-22 1964-07-21 Gen Electric Shielding of foil wound electrical apparatus
ATE61693T1 (de) * 1985-04-19 1991-03-15 Siemens Ag Kontaktierung metallbeschichteter kunststoffteile eines wickelkoerpers.
CN2463937Y (zh) * 2001-02-13 2001-12-05 云南变压器电气股份有限公司 半封闭型干式变压器
CN100411074C (zh) * 2004-08-07 2008-08-13 常州华迪特种变压器有限公司 三相干式变压器
DE102005015785A1 (de) * 2005-04-01 2006-11-16 Siemens Ag Transformator mit elektrischer Abschirmung
US20080061915A1 (en) * 2006-09-11 2008-03-13 Rodney Godbey Dry-type transformer with shielded core/coil assembly and method of manufacturing the same
DE102008011802A1 (de) * 2008-02-27 2009-09-03 Siemens Aktiengesellschaft Drosselanordnung mit einer eine erste und eine zweite Teilwicklung aufweisende Spule
AT507164B1 (de) * 2008-04-18 2010-03-15 Trench Austria Gmbh Elektrostatische abschirmung für einen hgü-bauteil
ES2406408T3 (es) * 2010-09-08 2013-06-06 Abb Technology Ag Arrollamiento de transformador

Also Published As

Publication number Publication date
ES2639111T3 (es) 2017-10-25
EP2869313A1 (fr) 2015-05-06
WO2015062838A1 (fr) 2015-05-07

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