EP0014418B2 - Wicklung für einen luftgekühlten Trockentransformator - Google Patents

Wicklung für einen luftgekühlten Trockentransformator Download PDF

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Publication number
EP0014418B2
EP0014418B2 EP80100436A EP80100436A EP0014418B2 EP 0014418 B2 EP0014418 B2 EP 0014418B2 EP 80100436 A EP80100436 A EP 80100436A EP 80100436 A EP80100436 A EP 80100436A EP 0014418 B2 EP0014418 B2 EP 0014418B2
Authority
EP
European Patent Office
Prior art keywords
winding
sections
layer
axial length
layers
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.)
Expired
Application number
EP80100436A
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German (de)
English (en)
French (fr)
Other versions
EP0014418A1 (de
EP0014418B1 (de
Inventor
Gerrit Bijlsma
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.)
Holec Systemen en Componenten BV
Original Assignee
Smit Transformatoren BV
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6062448&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0014418(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Smit Transformatoren BV filed Critical Smit Transformatoren BV
Priority to AT80100436T priority Critical patent/ATE442T1/de
Publication of EP0014418A1 publication Critical patent/EP0014418A1/de
Application granted granted Critical
Publication of EP0014418B1 publication Critical patent/EP0014418B1/de
Publication of EP0014418B2 publication Critical patent/EP0014418B2/de
Expired legal-status Critical Current

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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
    • 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

Definitions

  • the figure also shows that the voltage difference between the winding layers on the side facing away from the electrical connection can assume considerable values.
  • the transformer manufacturer is aware that due to the electrical stress, a sufficient safety distance must be maintained between the windings to be insulated from one another in adjacent winding layers. It can also be observed that the originally high insulation values decrease with advancing age of the transformer, which can be caused in part by contamination, material fatigue or change or crack formation. In particular, the formation of leakage current paths can be observed.
  • the transformer designer When designing the construction, the transformer designer will keep in mind that very high-quality, high-purity insulating material that is used for the spacer elements is generally very aging-resistant. However, this material is often very expensive and is preferably replaced by less material, which, however, has less high dielectric strength and aging resistance. On the other hand, the air that is present in the cooling channels must also be taken into account as an insulating material.
  • the present application has the task of obtaining aging-resistant insulation, particularly in the area of high voltage differences, preferably within high-voltage windings.
  • aging-resistant insulation particularly in the area of high voltage differences, preferably within high-voltage windings.
  • dust deposits and similar sources of contamination under the influence of moisture lead to leakage current paths.
  • the amount of material for the spacers should be kept as low as possible. It should still be possible to maintain the clear width of the cooling channels within the winding and not to complicate the construction of the coils.
  • This object is achieved in a winding for an air-cooled dry transformer or a choke coil of the type mentioned in that two axially successive spacer elements are arranged in the area of the electrical connections between the winding layers of the winding sections, distributed over the circumference in the cooling channels in the axial direction, the The length of the spacer elements is approximately 0.1 to 0.3, preferably somewhat longer than 0.25, the axis length, and that a peripheral air duct open to the outside is inserted on the half axis length between the winding sections.
  • the individual current conductors preferably consist of a monofilament wire; however, it is also possible to wind several wires together at the same time if higher performance is desired.
  • FIG. 1 shows, there are smaller voltage differences at the most electrically stressed points, in particular when layers lying one above the other are considered. These voltage differences can be sufficient through air insulation be separated. Spacers are then still required to determine the positions in order to increase the mechanical strength; However, these spacers do not need to be arranged over the entire length of the partial winding, since these are due to the usual consolidation of the winding layers, for. B. with cast resin, have a higher rigidity. In addition, there is advantageously a peripheral air duct which ensures reliable electrical isolation of the winding layers lying next to one another and at the same time increases the cooling capacity.
  • a layer winding is known from DE-AS 1 242 748, in which support strips are used which are shortened in relation to the layer length. However, these support strips are used in connection with windings which give channels for a forced flow in which the winding layers do not correspond to those in the configuration of the application.
  • the following winding layers 2, 3, ... are characterized by the fact that they consist of two sections 10, 11 of substantially the same length, divided on half the length of the axis, which alternate in the axis end or middle area with the one above and below Winding layer are electrically connected via connecting wires 12, 13. This results in an upper and a lower, essentially mirror-symmetrical partial winding (see reference numbers 10 ', 11').
  • Each of the partial windings has an external connection 14 and 15, respectively.
  • the two partial windings 10 ', 11' are only electrically connected to one another via the innermost layer of turns.
  • spacer elements 6, 7, which thus mechanically span cooling channels 18 between the winding layers and must also withstand the dielectric load.
  • the winding arrangement consists of an inner jacket 21 with the first winding layer 1 lying thereon, which consists of wires lying next to one another, preferably of insulated copper or aluminum wire.
  • a glass fiber jacket 23 is applied to the first winding days using the wet winding method. These are glass fibers impregnated with epoxy resin, which after curing result in a mechanically very strong cylinder.
  • spacer elements 6 are distributed over the circumference and a further cladding layer 25 made of impregnated, non-conductive glass fibers is applied. The spacer elements 6 are defined.
  • a cooling channel 18 between the winding layers is also created.
  • the next winding layer 27 is then wound up. This is followed by another intermediate layer made of non-conductive, hardening material.
  • the further stratification then follows this scheme.
  • the end forms a jacket 32 made of glass fiber reinforced plastic.
  • the inner layer 1 consists of wire wound close to one another, the layer extending continuously over the entire length of the axis.
  • spacer elements 6 are introduced, the length of which is preferably somewhat more than a quarter of the axial length of the winding arrangement.
  • the subsequent winding layer 2 consists of two sections 10, 11 of substantially the same length, divided on half the length of the axis, which in the end region with the one below Genden winding layer 1 are electrically connected to each other via the connecting wires 12, 13.
  • the sections 10 and 11 are then wound up to about the middle, where they approach each other mirror-symmetrically, but leave an air gap 20 approximately in the central region of the winding layer arrangement. There they are electrically connected to the winding layer above them via the wires 29, 30. Then the two sections belonging to the third winding layer are wound. These end in the lower section of the winding in an external connection 14.
  • a plurality of taps are provided, so that in addition to the outermost connection 15 there are further tapping points 15 'which, as is known per se from transformer technology, enable tapping to compensate for voltage.
  • the air gap 20 is guided to the outside; the outer jacket is therefore not closed. This arrangement further improves insulation and cooling and prevents leakage current paths.
  • the spacing elements 6 and 7 do not occupy the entire axis length, but only about a quarter of the axis length on each side.
  • the length of the spacer elements is determined by the mechanical forces on the winding layers; it is in the range 1/5 ... 3/5 of half the section length.
  • the air gap ensures that the winding layers lying one above the other are cleanly electrically separated from one another, that is to say they have no leakage current paths. Furthermore, the air gap 20 in the middle enables the electrical isolation between the two winding sections 10 ', 11'.
  • the clear width of the cooling channels can be optimally designed and thereby improve the cooling performance without having to accept significant disadvantages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP80100436A 1979-02-08 1980-01-29 Wicklung für einen luftgekühlten Trockentransformator Expired EP0014418B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80100436T ATE442T1 (de) 1979-02-08 1980-01-29 Wicklung fuer einen luftgekuehlten trockentransformator.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2904746A DE2904746C3 (de) 1979-02-08 1979-02-08 Wicklung für einen luftgekühlten Trockentransformator
DE2904746 1979-02-08

Publications (3)

Publication Number Publication Date
EP0014418A1 EP0014418A1 (de) 1980-08-20
EP0014418B1 EP0014418B1 (de) 1981-11-25
EP0014418B2 true EP0014418B2 (de) 1985-11-21

Family

ID=6062448

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80100436A Expired EP0014418B2 (de) 1979-02-08 1980-01-29 Wicklung für einen luftgekühlten Trockentransformator

Country Status (4)

Country Link
EP (1) EP0014418B2 (en, 2012)
JP (2) JPS55110011A (en, 2012)
AT (1) ATE442T1 (en, 2012)
DE (1) DE2904746C3 (en, 2012)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4438653C1 (de) * 1994-10-28 1996-06-20 Siemens Ag Gießharztransformator
DE10213117B4 (de) * 2002-03-23 2004-03-11 Amborn, Peter, Dr.-Ing. Wellenkupplung mit hohem Wirkungsgrad
CN114823097A (zh) * 2022-05-12 2022-07-29 重庆科新电气有限公司 一种大气隙3层式10kV线圈

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB641056A (en) * 1948-08-11 1950-08-02 English Electric Co Ltd Improvements in and relating to inductive windings
DE1039637B (de) * 1956-11-28 1958-09-25 Bbc Brown Boveri & Cie Lagenwicklung fuer mit Kuehlmittel-oeffnungen in den Wicklungslagen versehene Hochspannungsspulen
US3083331A (en) * 1959-12-16 1963-03-26 Ferranti Ltd Series parallel transformer winding arrangement
US2987684A (en) * 1960-04-18 1961-06-06 Gen Electric Electrical apparatus
DE1270167B (de) * 1962-11-27 1968-06-12 Licentia Gmbh In Giessharz eingebettete Wicklung fuer Leistungstransformatoren in Trockenbauweise
DE1242748B (de) * 1963-11-11 1967-06-22 Licentia Gmbh Hochspannungslagenwicklung fuer Transformatoren, Drosselspulen u. dgl. Induktionsgeraete
DE1513916B2 (de) * 1965-03-01 1970-04-16 Licentia Patent-Verwaltungs-GmbH, 6OOO Frankfurt; Wicklungsaufbau mit mehreren axial übereinanderliegenden Teilwicklungen für Transformatoren und Drosselspulen
DE2207205C3 (de) * 1972-02-16 1979-02-22 Transformatoren Union Ag, 7000 Stuttgart Luftgekühlter Transformator mit einem oder mehreren axialen Kühlkanälen
DE2246235B2 (de) * 1972-09-21 1978-08-24 Transformatoren Union Ag, 7000 Stuttgart Trockentransformator

Also Published As

Publication number Publication date
DE2904746A1 (de) 1980-08-28
JPH0132339Y2 (en, 2012) 1989-10-03
JPS63174420U (en, 2012) 1988-11-11
DE2904746B2 (de) 1981-07-09
ATE442T1 (de) 1981-12-15
EP0014418A1 (de) 1980-08-20
DE2904746C3 (de) 1985-01-24
EP0014418B1 (de) 1981-11-25
JPS55110011A (en) 1980-08-25

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