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EP2863402A1 - Enroulement de bande pour transformateurs haute tension - Google Patents

Enroulement de bande pour transformateurs haute tension Download PDF

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Publication number
EP2863402A1
EP2863402A1 EP20130004988 EP13004988A EP2863402A1 EP 2863402 A1 EP2863402 A1 EP 2863402A1 EP 20130004988 EP20130004988 EP 20130004988 EP 13004988 A EP13004988 A EP 13004988A EP 2863402 A1 EP2863402 A1 EP 2863402A1
Authority
EP
European Patent Office
Prior art keywords
conductor
individual conductors
tape winding
axial
strip conductor
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.)
Withdrawn
Application number
EP20130004988
Other languages
German (de)
English (en)
Inventor
Irma Buschmann
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
Application filed by ABB Technology AG filed Critical ABB Technology AG
Priority to EP20130004988 priority Critical patent/EP2863402A1/fr
Priority to CN201420600765.4U priority patent/CN204407149U/zh
Publication of EP2863402A1 publication Critical patent/EP2863402A1/fr
Withdrawn legal-status Critical Current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
    • H01F27/2804—Printed 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
    • H01F27/2804—Printed windings
    • H01F2027/2809—Printed windings on stacked layers

Definitions

  • the invention relates to a tape winding for high-voltage transformers, comprising a strip conductor with a rectangular cross-section, which is arranged in a plurality of winding layers spirally about a winding axis.
  • the invention also relates to a corresponding high-voltage transformer.
  • high-voltage transformers in the voltage range of, for example, 1 kV to 60 kV on the low side often include so-called hoop windings.
  • Tape windings have a strip conductor with a rectangular cross-section, which is arranged spirally similar to a winding axis, wherein a winding layer is formed only by a single turn of the strip conductor.
  • both a low voltage to be induced in such a case, for example on the low voltage side 3 kV, as well as a high cross section of the strip conductor corresponds to a correspondingly high undervoltage side current, for example 500A.
  • Band conductors are made of a metal such as copper or aluminum, for example, and are surrounded by a layer of insulating material to avoid a short circuit between adjacent turns.
  • a disadvantage here proves that in particular by the proximity effect - that is, a current displacement - causes a current density over the relatively large cross section of the strip conductor results, which is higher in its edge regions than in the central region.
  • the causing magnetic field is the stray field of the transformer. This is associated with increased additional losses and hot spots in the edge regions of a respective tape winding.
  • a tape winding of the type mentioned is characterized in that the band conductor in turn is formed from at least two band-like individual conductors arranged side by side in a layer also rectangular in cross-section and that the individual conductors along the extension of the strip conductor in at least one exchange area are cyclically interchanged with each other whereby thereby a respective axial offset of the respective individual conductors is effected.
  • the basic idea of the invention consists of constructing the strip conductor from a plurality of mutually insulated individual conductors, which are cyclically reversed in their position within the cross section of the strip conductor formed by them.
  • the additional losses are advantageously reduced by the fact that the position of the conductor is changed in causing magnetic field.
  • a pure axial segmentation of mutually insulated individual conductors - that is, without cyclic exchange - brings no outstanding effect, since here the induced eddy currents can still form, for example via the Austechnischsschienen circular currents between the individual conductors.
  • By axial transposition - ie a cyclic exchange of individual conductors - the eddy current losses are effectively reduced.
  • each individual conductor ideally assumes any axial position over its entire length, so that in an advantageous manner asymmetries, which are based on different axial positions, are at least substantially compensated.
  • a holding together of neighboring individual leaders the strip conductor can be effected, for example, by an enveloping insulation, for example a resin-based insulation and / or a wound insulation.
  • the tape winding is in this case axially in two or preferably three or more parallel individual conductors, which are preferably coated on both sides insulating performed.
  • the individual conductors are exchanged cyclically at regular or irregular intervals, so that the individual conductors occupy the next position in the axial direction after an exchange.
  • the outermost (last) single conductor in exchange direction is led to the outermost (first) position.
  • the number of longitudinal sections of the strip conductor formed by the exchange regions corresponds approximately to the same length of the longitudinal sections to the number of individual conductors or to an integral multiple thereof. This advantageously ensures that each individual conductor is arranged on the middle with an equally long longitudinal section at each of the respective possible axial positions, so that any position-related asymmetries of an respectively induced voltage are at least almost equalized.
  • the individual conductors are folded in a respective exchange region.
  • a folding for example by 45 °, is a suitable method for band-like conductors to direct the actually straight course of the band-shaped individual conductor in a different direction and thus to effect an axial offset.
  • a respective thickening of the strip conductor by the factor in the exchange or folding region is negligible in so far as, for example, only three individual conductors ultimately only two exchange areas are necessary to achieve symmetry of each induced in the individual conductors voltage. For a total number of turns of 20, for example, this is of little consequence.
  • a further advantageous embodiment variant of the tape winding according to the invention is following exactly a single conductor in a respective exchange region by a quadruple folding from an axial outer position to the opposite offset axial outer position, the remaining individual conductors are each offset by a double folding by one axial position.
  • the individual conductors are first folded at a 45 ° angle to the left or right. Then the single conductors are folded back at a further 45 ° angle at the next axial position in the winding direction.
  • the outermost (last) single conductor in the exchange direction however, folded at 180 ° angle under the individual conductors. Then another folding takes place by 180 ° in the opposite direction. Finally, a folding takes place in the winding direction at a 45 ° angle to the first axial position in the exchange direction.
  • the axial offset of a respective individual conductor corresponds exactly to the width of a single conductor or an integral multiple thereof. This ensures that the axial positions, which a single conductor can assume within the cross section of the strip conductor formed by a plurality of individual conductors, are always the same. Thus, an over the entire length of the strip conductor constant shape is ensured in an advantageous manner, with the exception of the respective exchange areas, which are characterized by a slight thickening by about a factor of three.
  • the individual conductors are at least predominantly surrounded by a layer of insulating material. It is on the one hand to provide an electrical insulation of the individual conductors of a strip conductor with each other, as well as for an isolation of adjacent layers of the strip conductor. This is achieved in an advantageous manner that no short circuit of different voltage potentials of adjacent winding layers takes place.
  • the object according to the invention is also achieved by a high-voltage transformer comprising at least one transformer core and a strip winding according to the invention.
  • the associated advantages correspond to the advantages of the tape winding according to the invention already explained above.
  • the high voltage transformer is designed three-phase and thus suitable for a typical power distribution network.
  • Fig. 1 shows a first exemplary band conductor 10 in a plan view.
  • the strip conductor 10 is formed by three mutually insulated individual conductors 12, 14, 16, which are cyclically exchanged in an exchange region 18.
  • a respective individual conductor 12, 14, 16 changes from one of the possible axial positions 20, 22, 24 to one of the other possible positions 20, 22, 24.
  • the band-like shape of the strip conductor is not adversely affected thereby, only in the exchange region 18 occurs slight thickening on.
  • Fig. 2 shows a comparable second exemplary band conductor 30 in a plan view.
  • the strip conductor 30 is formed by two insulated individual conductors 32, 34, which are exchanged cyclically in a exchange region 36.
  • the single conductor 32 changes from an axial position 38 into an axial position 40 or the individual conductor 34 from the axial position 40 into the axial position 38.
  • Fig. 3 shows a cross section through an exemplary coil with coil winding in a sectional view 40.
  • a bobbin 42 around a winding axis 44 around a winding winding 44 with a belt winding with seven winding layers 52, 54, 56, 58, 60, 62, 64 of a strip conductor is arranged.
  • the strip conductor itself has in each case three individual conductors, which are each arranged either in a first 46, second 48 or third 50 axial position or axial position range within the cross section of the strip conductor.
  • a respective cyclic exchange of the position of the individual conductors is indicated by the arrows indicated by the reference numeral 66.
  • each individual conductor occupies each axial position with a respective equal section length, so that any asymmetries of the voltages induced in the individual individual conductors that are caused by the different axial positions advantageously at least approximately compensate each other.
  • FIG. 4 3 shows a third exemplary ribbon conductor 70 having three single conductors and two exemplary exchange regions 72, 74. On both sides of the exchange regions 72, 74, longitudinal sections 76, 78, 80 of the individual conductors are formed, in which the individual conductors run in a respectively exchanged axial position.
  • the Figures 5 and 6 are exemplary steps in the folding of a strip conductor with three individual conductors.
  • steps A and B is shown how the three conductors of a strip conductor are folded at a 45 ° angle by 90 ° upwards.
  • steps C and D the originally axially lower two individual conductors are folded back in a further 45 ° folding back into an axial position offset by a width of a single conductor upwards.
  • step E is shown how the originally axially upper single conductor is folded by 180 ° and is guided vertically below the other individual conductors down, where it is then guided by a further 180 ° folding back up, as shown in step F.
  • step G By a further 45 ° folding takes place in a step G, the assumption of the individual conductor initially located in the uppermost axial position of the strip conductor in the now axially lowest position of the strip conductor, as shown in step H.
  • step H a cyclic phase change of the individual conductors is realized by folding.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP20130004988 2013-10-18 2013-10-18 Enroulement de bande pour transformateurs haute tension Withdrawn EP2863402A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20130004988 EP2863402A1 (fr) 2013-10-18 2013-10-18 Enroulement de bande pour transformateurs haute tension
CN201420600765.4U CN204407149U (zh) 2013-10-18 2014-10-17 用于高压变压器的带状绕组及其相关高压变压器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20130004988 EP2863402A1 (fr) 2013-10-18 2013-10-18 Enroulement de bande pour transformateurs haute tension

Publications (1)

Publication Number Publication Date
EP2863402A1 true EP2863402A1 (fr) 2015-04-22

Family

ID=49447329

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20130004988 Withdrawn EP2863402A1 (fr) 2013-10-18 2013-10-18 Enroulement de bande pour transformateurs haute tension

Country Status (2)

Country Link
EP (1) EP2863402A1 (fr)
CN (1) CN204407149U (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017211549A1 (fr) 2016-06-08 2017-12-14 Wobben Properties Gmbh Enroulement d'un générateur d'une éolienne et procédé de raccordement de conducteurs plats
CN113255172A (zh) * 2021-07-12 2021-08-13 国网江西省电力有限公司电力科学研究院 一种反复短时短路工况下的绕组实时温升计算方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE334623C (de) * 1921-03-17 Walter Sauer Dipl Ing Wicklung fuer elektrische Geraete
US2249509A (en) * 1939-08-31 1941-07-15 Gen Electric Rectangular cable and method of making the same
GB617660A (en) * 1945-10-12 1949-02-09 British Thomson Houston Co Ltd Improvements in and relating to electric coil windings, particularly for high-voltage current transformers
DE2943124A1 (de) * 1979-10-25 1981-05-07 Teldix Gmbh, 6900 Heidelberg Elektrische wicklung fuer einen transformator, eine drosselspule o.dgl.
EP1085537A2 (fr) * 1999-09-14 2001-03-21 Mannesmann VDO Aktiengesellschaft Transformateur planaire, procédé de fabrication de son enroulement et appareil électrique compacte comportant un tel transformateur planaire
DE10040415C1 (de) * 2000-08-18 2002-01-10 Robert Seuffer Gmbh & Co Kg Induktives Bauelement
WO2009109689A1 (fr) * 2008-03-04 2009-09-11 Abb Technology Ag Enroulement en disque

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE334623C (de) * 1921-03-17 Walter Sauer Dipl Ing Wicklung fuer elektrische Geraete
US2249509A (en) * 1939-08-31 1941-07-15 Gen Electric Rectangular cable and method of making the same
GB617660A (en) * 1945-10-12 1949-02-09 British Thomson Houston Co Ltd Improvements in and relating to electric coil windings, particularly for high-voltage current transformers
DE2943124A1 (de) * 1979-10-25 1981-05-07 Teldix Gmbh, 6900 Heidelberg Elektrische wicklung fuer einen transformator, eine drosselspule o.dgl.
EP1085537A2 (fr) * 1999-09-14 2001-03-21 Mannesmann VDO Aktiengesellschaft Transformateur planaire, procédé de fabrication de son enroulement et appareil électrique compacte comportant un tel transformateur planaire
DE10040415C1 (de) * 2000-08-18 2002-01-10 Robert Seuffer Gmbh & Co Kg Induktives Bauelement
WO2009109689A1 (fr) * 2008-03-04 2009-09-11 Abb Technology Ag Enroulement en disque

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017211549A1 (fr) 2016-06-08 2017-12-14 Wobben Properties Gmbh Enroulement d'un générateur d'une éolienne et procédé de raccordement de conducteurs plats
DE102016110533A1 (de) * 2016-06-08 2017-12-14 Wobben Properties Gmbh Wicklung eines Generators einer Windenergieanlage sowie Verfahren zum Verbinden von Flachbandleitern
CN113255172A (zh) * 2021-07-12 2021-08-13 国网江西省电力有限公司电力科学研究院 一种反复短时短路工况下的绕组实时温升计算方法
CN113255172B (zh) * 2021-07-12 2021-11-19 国网江西省电力有限公司电力科学研究院 一种反复短时短路工况下的绕组实时温升计算方法

Also Published As

Publication number Publication date
CN204407149U (zh) 2015-06-17

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