EP2866235B1 - Transformateurs haute tension - Google Patents

Transformateurs haute tension Download PDF

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Publication number
EP2866235B1
EP2866235B1 EP13005035.4A EP13005035A EP2866235B1 EP 2866235 B1 EP2866235 B1 EP 2866235B1 EP 13005035 A EP13005035 A EP 13005035A EP 2866235 B1 EP2866235 B1 EP 2866235B1
Authority
EP
European Patent Office
Prior art keywords
barrier
coil
voltage transformer
barrier structure
transformer according
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
EP13005035.4A
Other languages
German (de)
English (en)
Other versions
EP2866235A1 (fr
Inventor
Benjamin Weber
Jens Tepper
Tobias Asshauer
Udo Chudobba
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 PL13005035T priority Critical patent/PL2866235T3/pl
Priority to EP13005035.4A priority patent/EP2866235B1/fr
Priority to CA2866054A priority patent/CA2866054C/fr
Priority to US14/515,102 priority patent/US9478350B2/en
Priority to CN201410564835.XA priority patent/CN104575988B/zh
Publication of EP2866235A1 publication Critical patent/EP2866235A1/fr
Application granted granted Critical
Publication of EP2866235B1 publication Critical patent/EP2866235B1/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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/322—Insulating of coils, windings, or parts thereof the insulation forming channels for circulation of the fluid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/06—Insulation of 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/327—Encapsulating or impregnating
    • H01F2027/328—Dry-type transformer with encapsulated foil winding, e.g. windings coaxially arranged on core legs with spacers for cooling and with three phases

Definitions

  • the invention relates to a high-voltage transformer according to the preamble of patent claim 1.
  • intermediate barriers between adjacent coils are essentially plates made of an insulating material, which are arranged between the coils and which allow by a correspondingly extended discharge path along the surface thereof to arrange the respective coils with a correspondingly smaller distance from each other.
  • the US 4,173,747 A discloses a transformer coil having a fully encircling fully encircling flexible barrier structure with strip-like spacers.
  • the WO 2006/069 590 A1 discloses an electrical induction device for high voltage applications, each having a hollow cylindrical inner and outer winding arranged around a leg and interleaved, in the radial gap of which a complete barrier structure is arranged.
  • the EP 2 472 533 A1 discloses a transformer winding with two radially interleaved hollow cylindrical winding parts, in the radial gap a full-scale barrier structure is provided.
  • the US 3,142,029 A discloses coils surrounded by metallic shields axially spaced by annular spacers.
  • a respective barrier structure typically includes the entire axial length of a coil, but may also be somewhat shortened or lengthened as needed.
  • different opposite surface areas result.
  • two barrier structures are provided, for example for the middle coil, arranged radially on the outside, wherein a barrier structure arranged radially on the outside is required for each of the two outer coils.
  • each barrier In the case of a triangular transformer core, each barrier would have two barrier structures offset by 60 ° from each other, which should be realized by an overarching barrier structure.
  • each of the two coils in the region to the adjacent coil would be provided with a barrier structure.
  • the barrier structures are designed such that the voltage difference occurring between the electrical windings of the adjacent coils during operation is held without an additional barrier wall arranged between the coils.
  • An integrated barrier structure advantageously reduces the field strength loading prevailing between the coils in such a way that no further intermediate barrier is necessary any more.
  • a barrier structure can be thought of as a lens-like attachment to the radially outer surface of a coil.
  • a barrier structure has already been integrated into the coil during the production process, similar to the cooling channels known to those skilled in the art, which, however, are not arranged on the surface of the coil, but between radially adjacent coil segments.
  • the mechanical stability of a respective transformer is advantageously increased because a mechanically labile construction of one or more barrier plates arranged between the coils has been dispensed with.
  • all the connections of the coils can be guided without geometric impairments.
  • the barrier structures comprise axially extending strips which carry a barrier wall arranged radially above them.
  • Such a concept is characterized by a simple manufacturing method and a high mechanical stability.
  • As a sufficiently stable material for the strips for example, offers a glass fiber composite material.
  • the barrier wall is at least partially made of one wrapped band-like material.
  • a belt-like material such as a resin impregnated glass fiber reinforced fiber roving, which is heated after completion of the winding process of a coil and thereafter forms a hardened structure, is known in winding coils of high voltage transformers for isolation and stabilization purposes.
  • it is therefore provided in a variant to fix the radially outer barrier structure with such a material or even to wrap it at least partially.
  • this achieves both high mechanical strength and good insulation capability.
  • the barrier wall at least partially consists of a prefabricated cylindrical element, for example an insulating half-shell.
  • a prefabricated cylindrical element for example an insulating half-shell.
  • Such cylinder or shell elements can be easily integrated during the winding process of a coil and have proven themselves, for example, in the integration of cooling channels.
  • the barrier structure of at least one coil is formed over its entire circumference.
  • a 360 ° circulating barrier structure is characterized in particular by a simpler manufacturing, on the other hand, a slightly increased space is needed. If this installation space is present at a respective transformer, in this way the production of the coils can be simplified in an advantageous manner, and it is also no longer to pay attention to an alignment of the barrier structure relative to the transformer core.
  • the barrier structure of at least one coil is not formed over its entire circumference, wherein the cross section of the barrier structure is stepped-like at its two outer ends.
  • This is a variant which can be realized in a particularly simple manner, for example by means of a plurality of strips with radially attached shell element, wherein the two outer Steps are formed by a respective side wall of the respective outer strips.
  • the barrier structure of at least one coil is not formed over its entire circumference, wherein the cross section of the barrier structure at its two outer ends merges flat into the surface of the coil.
  • this is particularly suitable for at least partially wound barrier walls, wherein a respective insulating strip (18, 20, 22, 52, 72) then runs approximately tangentially between the upper edge of a respective outer strip and the surface of the respective coil.
  • At least one of the barrier structures forms cavities extending over their entire axial length, which cavities act as cooling channels.
  • a barrier structure is very similar to the structure of cooling channels arranged between radially adjacent coil segments, for example in the scattering channel.
  • the chimney effect is advantageously utilized.
  • at least one of the barrier structures projects beyond at least one axial end of the respective coil. This is useful, for example, for controlling the air conditions at the ends of the respective cooling channels in order to increase their cooling effect.

Claims (6)

  1. Transformateur à haute tension (10), comprenant un noyau de transformateur pourvu d'au moins deux branches de noyau (12, 14, 16) parallèles dans la direction axiale, sur chacune desquelles est disposée une bobine cylindrique creuse (18, 20, 22, 52, 72), chacune comportant au moins un enroulement électrique ; au moins dans des zones partielles de surfaces (36, 38) se faisant face de bobines adjacentes (18, 20, 22, 52, 72), les zones de surface respectives des bobines ont une structure de barrière (54, 74) électriquement isolante qui est intégrée radialement à l'extérieur et la structure de barrière (54, 74) d'au moins une bobine (18, 20, 22, 52, 72) n'est pas formée sur toute sa circonférence,
    caractérisé en ce que
    les structures de barrière (54, 74) comprennent des bandes (26, 30, 34), s'étendant axialement qui portent une paroi de barrière (24, 28, 32, 56, 58) disposée radialement au-dessus d'elles, une pluralité de couches, radialement adjacentes, de bandes (26, 30, 34) et de parois de barrière (24, 28, 32, 56, 58) étant prévues au moins par endroits, et la section transversale de la structure de barrière (54, 74) se fondant, à ses deux extrémités extérieures, à plat dans la surface de la bobine (18, 20, 22, 52, 72) ou étant matricée, à ses deux extrémités extérieures, à la manière de gradins, les deux grains extérieurs étant formés par une paroi latérale respective des bandes extérieures respectives.
  2. Transformateur à haute tension selon la revendication 1, caractérisé en ce que la paroi de barrière (24, 28, 32, 56, 58) est enroulée au moins partiellement à partir d'un matériau en bande.
  3. Transformateur à haute tension selon la revendication 1 ou 2, caractérisé en ce que la paroi de barrière (24, 28, 32, 56, 58) comporte au moins partiellement un élément cylindrique préfabriqué.
  4. Transformateur à haute tension selon l'une des revendications précédentes, caractérisé en ce que la structure de barrière (54, 74) d'au moins une bobine (18, 20, 22, 52, 72) est formée sur toute sa circonférence.
  5. Transformateur à haute tension selon l'une des revendications précédentes, caractérisé en ce que l'une au moins des structures de barrière (54, 74) comporte des cavités (60, 62) qui s'étendent sur toute longueur axiale de celle-ci et qui servent de conduits de refroidissement.
  6. Transformateur à haute tension selon l'une des revendications précédentes, caractérisé en ce que l'une au moins des structures de barrière (54, 74) fait saillie au-delà d'au moins une extrémité axiale de la bobine respective (18, 20, 22, 52, 72).
EP13005035.4A 2013-10-22 2013-10-22 Transformateurs haute tension Active EP2866235B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PL13005035T PL2866235T3 (pl) 2013-10-22 2013-10-22 Transformator wysokiego napięcia
EP13005035.4A EP2866235B1 (fr) 2013-10-22 2013-10-22 Transformateurs haute tension
CA2866054A CA2866054C (fr) 2013-10-22 2014-10-03 Transformateur a haute tension
US14/515,102 US9478350B2 (en) 2013-10-22 2014-10-15 High-voltage transformer
CN201410564835.XA CN104575988B (zh) 2013-10-22 2014-10-22 高压变压器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13005035.4A EP2866235B1 (fr) 2013-10-22 2013-10-22 Transformateurs haute tension

Publications (2)

Publication Number Publication Date
EP2866235A1 EP2866235A1 (fr) 2015-04-29
EP2866235B1 true EP2866235B1 (fr) 2019-09-25

Family

ID=49474188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13005035.4A Active EP2866235B1 (fr) 2013-10-22 2013-10-22 Transformateurs haute tension

Country Status (5)

Country Link
US (1) US9478350B2 (fr)
EP (1) EP2866235B1 (fr)
CN (1) CN104575988B (fr)
CA (1) CA2866054C (fr)
PL (1) PL2866235T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT518664B1 (de) 2016-04-22 2017-12-15 Trench Austria Gmbh HGÜ-Luftdrosselspule und Verfahren zur Herstellung

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2388566A (en) * 1942-05-16 1945-11-06 Gen Electric Electric apparatus
US3142029A (en) * 1960-08-22 1964-07-21 Gen Electric Shielding of foil wound electrical apparatus
US3302149A (en) * 1964-09-30 1967-01-31 Westinghouse Electric Corp Electrical insulating structure
US4173747A (en) * 1978-06-08 1979-11-06 Westinghouse Electric Corp. Insulation structures for electrical inductive apparatus
ATE465502T1 (de) * 2004-12-27 2010-05-15 Abb Technology Ag Elektrische induktionseinrichtung für hochspannungsanwendungen
WO2009046733A1 (fr) * 2007-09-28 2009-04-16 Siemens Aktiengesellschaft Corps d'enroulement électrique et transformateur à refroidissement forcé
AT507164B1 (de) * 2008-04-18 2010-03-15 Trench Austria Gmbh Elektrostatische abschirmung für einen hgü-bauteil
EP2472533A1 (fr) * 2011-01-04 2012-07-04 ABB Technology AG Enroulement de transformateur doté d'un canal de refroidissement
BRPI1100186B1 (pt) * 2011-02-02 2020-03-31 Siemens Aktiengesellschaft Transformador de distribuição a seco
CN103093942B (zh) * 2011-11-01 2016-03-09 株式会社日立产机系统 非晶铁芯变压器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2866235A1 (fr) 2015-04-29
PL2866235T3 (pl) 2020-04-30
US9478350B2 (en) 2016-10-25
US20150109089A1 (en) 2015-04-23
CA2866054A1 (fr) 2015-04-22
CN104575988B (zh) 2018-03-30
CA2866054C (fr) 2022-04-26
CN104575988A (zh) 2015-04-29

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