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WO2009138099A1 - Connexion de modules d'enroulements de transformateur - Google Patents

Connexion de modules d'enroulements de transformateur Download PDF

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Publication number
WO2009138099A1
WO2009138099A1 PCT/EP2008/003824 EP2008003824W WO2009138099A1 WO 2009138099 A1 WO2009138099 A1 WO 2009138099A1 EP 2008003824 W EP2008003824 W EP 2008003824W WO 2009138099 A1 WO2009138099 A1 WO 2009138099A1
Authority
WO
WIPO (PCT)
Prior art keywords
transformer winding
coupling arrangement
arrangement according
transformer
winding modules
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.)
Ceased
Application number
PCT/EP2008/003824
Other languages
German (de)
English (en)
Inventor
Charles W. Johnson
Jan Leander
Karel Bilek
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 PCT/EP2008/003824 priority Critical patent/WO2009138099A1/fr
Priority to DE112008003836T priority patent/DE112008003836A5/de
Priority to PCT/EP2008/010246 priority patent/WO2009138116A1/fr
Publication of WO2009138099A1 publication Critical patent/WO2009138099A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H01F30/16—Toroidal transformers
    • 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
    • H01F27/02—Casings
    • H01F27/022—Encapsulation
    • 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
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures

Definitions

  • the invention relates to a coupling arrangement of a plurality of transformer winding modules, wherein a transformer winding module each comprises at least a first and a second galvanically separated part winding, which are arranged about a common winding axis.
  • a 3-phase power transformer usually has at least one primary and one secondary winding for each phase, so that a total of at least 6 individual windings result.
  • 3-phase power transformers are known in which all windings are arranged around a common transformer core having a plurality of legs, wherein one leg is then wrapped, for example, each of a primary and a secondary winding of a phase.
  • 3-phase power transformers which are formed by suitable electrical shading of three 1-phase transformers in which the primary and secondary windings of each phase are each penetrated by a separate annular transformer core.
  • a disadvantage of this arrangement is in particular that only the second winding is segmented, while the first, core near winding is continuously guided spirally around the transformer core.
  • the coupling arrangement according to the invention is characterized in that the respective first partial windings of the transformer winding modules in electrical series connection and the respective second partial windings are connected in electrical parallel connection with each other. Due to the electrical series connection of the respective first partial windings, the voltage load of the respective first partial winding advantageously decreases with the number of interconnected transformer winding modules.
  • the series connection of the respective first partial windings leads to a reduced electrical insulation effort and is preferably suitable for high voltage levels.
  • the parallel connection of the respective second partial windings is preferably suitable for high currents with a reduced electro-mechanical connection complexity.
  • the upper-voltage side for example 3OkV - 11OkV
  • the parallel connection of the respective second partial windings takes into account the requirements of the higher currents on the low-voltage side (for example 6kV-3OkV) with little electrical-mechanical connection expense.
  • the electrical connection of the transformer winding modules takes place at least in sections using electrical conductors encased with at least one electrical insulation layer.
  • the thickness of the insulating layer is dimensioned such that the voltage stresses occurring during operation can be held by the insulating layer. The risk of a voltage flashover within the coupling arrangement is thereby significantly reduced.
  • an electrical conductor sheathed by at least one electrical insulation layer also has a grounded conductive shield enclosing the same, which radially outwardly adjoins the at least one electrical insulation layer.
  • the transformer winding modules are provided for an operating voltage of at least 6 kV.
  • the voltage of at least 6kV refers to at least one of the two partial windings. From this voltage range, the isolation advantages of the coupling arrangement according to the invention come especially to bear.
  • the partial windings in the respective transformer winding modules are cast together, for example with an insulating material based on epoxy resin.
  • the mechanical stability of a transformer winding module is thereby increased while increasing the insulation strength.
  • this also allows a more compact construction of the arrangement, because the distances between individual components can be further reduced.
  • the transformer winding modules are arranged along a circular path about a common center axis.
  • identical transformer winding modules are preferably space-saving and can be connected to one another with short lengths of the connecting conductors.
  • the transformer winding modules are penetrated by a common closed annular or polygonal transformer core, so that during operation of the coupling arrangement occurring magnetic flux is passed through the transformer core.
  • the penetration of the transformer core is effected by a cylinder-like clearance around an imaginary winding axis of the respective part windings, around which they are wound.
  • the transformer core Preferably, here is the polygonal configuration of the transformer core, that is, it has in the areas which pass through the respective transformer winding modules, straight legs, the legs are connected at buckling or bending points angularly interconnected or merge into each other.
  • a barrier with electrical insulation material is at least partially disposed between adjacent transformer winding modules arranged along a circular path, wherein such a barrier is preferably designed in the form of a plate which has an approximately identical insulation resistance between its two sides.
  • the barrier contains a glass fiber composite material. This combines good electrical insulation properties with high mechanical stability.
  • the barriers in a particularly space-saving manner, starting from the Mit- telachse arranged in the radial direction between adjacent transformer winding modules.
  • the number of transformer winding modules is 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12.
  • the specified number range covers approximately a typical gear ratio of a power transformer. So it is for example particularly favorable to select a number of transformer modules of 11 in a power transformer with a rated voltage of the lower side 10kV and upper side 11OkV. In this way, it is possible that the conductor cross-section of the primary and secondary windings is approximately the same due to the electrical interconnection of the transformer winding modules according to the invention, which leads to manufacturing advantages.
  • transformer winding modules For reasons of construction, a similar number of transformer winding modules can also be selected, which results in a more favorable angle for the production between the arranged around the central axis transformer winding modules result, for example, in this case 8, 9 or 12.
  • FIG. 1 shows an exemplary transformer winding module
  • Fig. 2 shows an exemplary coupling arrangement
  • FIG. 3 shows an exemplary arrangement of transformer winding modules, barriers and an octagonal transformer core
  • FIG. 1 shows a transformer winding module 10 having a first partial winding 12 arranged radially about a winding axis 22 and a second partial winding 18 arranged radially inward of the first partial winding 12.
  • the first partial winding 12, wel che is provided according to the invention for the electrical series connection with further first part windings, is provided at its two conductor ends with two electrical connection options 16, preferably suitable for the connection of shielded cables.
  • the first partial winding 12 is arranged radially inward and the second partial winding 14 is arranged radially outwardly about the winding axis 22.
  • the second partial winding 14 is also provided at its two conductor ends, each with two corresponding electrical connection options 16.
  • the transformer winding module 10 is potted by means of a potting material 20, so that the first partial winding 12 and the second partial winding 14 each form a rigid unit, which is particularly easy to handle.
  • the casting material 20 to be used is a suitable, electrically insulating material, for example based on epoxy resin. Such encapsulation with a suitable insulation material also allows an even more compact arrangement of the transformer winding modules, because insulation distances are thereby further reduced.
  • FIG. 2 shows an exemplary coupling arrangement 30 with a total of nine electrically connected transformer winding modules 31, 32, 33, 34, 35, 36, 37, 38, 39, which are arranged along a circular path about a central axis 56.
  • the respective first partial windings are connected to one another in series by means of electrical conductors, of which the first conductor, to which the first partial winding of the first transformer winding module 31 is connected to the first partial winding of the second transformer winding module 32, is provided with the reference symbol 42 in the FIGURE , Accordingly, the eighth conductor, with which the first partial winding of the eighth transformer winding module 38 is connected to the first partial winding of the ninth transformer winding module 39, is provided with the reference numeral 42.
  • electrical conductors are particularly suitable shielded cable with a corresponding insulating layer between the actual conductor and the preferably grounded shield, which sheathed the conductor.
  • the connection of a cable with the corresponding connection options to the transformer winding modules 31 - 39 is preferably clamped, screwed and / or pluggable.
  • the respective other terminals of the respective first partial windings of the first 31 and the ninth transformer winding module 39 are - preferably also by means of a shielded cable connection - each led to a hunt group 46, by means of which the series connection of all first partial windings can be connected for example to an electrical power supply network.
  • the respective second partial windings of the transformer winding modules 31-39 are connected in parallel by means of eighteen electrical conductors, with the two conductors, which connect the second partial windings of the first 31 and second 32 transformer winding modules, being identified by reference numerals 50 and 52 by way of example.
  • These conductors are preferably each designed as a cable with grounded shield.
  • the parallel connection of the nine transformer winding modules 31 - 39 can be connected to an electrical power supply network.
  • Another electrical connection of such a 1-phase coupling arrangement with two other similar coupling arrangements to a 3-phase coupling arrangement with the functionality of a 3-phase power transformer is well within the scope of this invention.
  • Fig. 60 again shows a coupling arrangement of eight transformer winding modules 71-78, which are arranged in a star shape along a circular path around a central axis.
  • the electrical connection of the transformer winding modules 71-78 corresponding to that shown in FIG. 2 is not shown here.
  • the geometric configuration of the cross section of the radially outer partial winding of the respective transformer winding modules is triangular, so that the inner region of the arrangement around the central axis is better utilized than in a corresponding rectangular cross-section of the respective radially outer partial windings.
  • the first and second sub-windings of the respective transformer winding modules 71-78 are arranged radially about a respective winding axis, of which the winding axis of the eleventh transformer winding module 71 is denoted by 81 and the winding axis of the eighteenth transformer winding module 78 by 88 in the figure.
  • barriers 61-68 which are also positioned in a star shape about the central axis of the coupling arrangement between adjacent transformer winding modules 71-78.
  • These barriers 61-68 are preferably predominantly made of a plate-shaped insulating material which, for example, also comprises a glass fiber composite and an epoxy resin compound.
  • FIG. 10 Also shown in FIG. 10 is an octagonal transformer core 80 around which the transformer winding modules 71-78 are disposed.
  • This transformer core 80 has eight straight legs, each of which passes through a transformer winding module 71 - 78 along their respective winding axis. The geometric transition between the respective legs is arcuate.
  • a transformer core 80 executed in sections in straight legs has the advantage that a respective transformer winding module 71-80 can be arranged nearer to the core and no increase in spacing between the winding and core caused by bending radii is produced.
  • Exemplary transformer winding module First partial winding Second partial winding Terminals of the first partial winding Terminals of the second partial winding Potting material Winding axis
  • Exemplary coupling arrangement First transformer winding module Second transformer winding module Third transformer winding module Fourth transformer winding module
  • Fifth transformer winding module Sixth transformer winding module Seventh transformer winding module
  • Ninth transformer winding module Connecting the first winding of the first transformer winding module First electrical conductor connecting first partial windings Eighth electrical conductor for connecting first partial windings Hunt group of all first partial windings Connection of the second partial winding of the third transformer winding module First electrical conductor for connecting second partial windings Second electrical conductor for connecting second partial windings Sa Central connection of all second partial windings Central axis
  • Fourth barrier Fifth barrier
  • Eleventh transformer winding module Twelfth transformer winding module

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

Abstract

L'invention concerne un dispositif de connexion (30) de plusieurs modules d'enroulements de transformateur (12, 31 - 39, 71 - 78) qui comportent chacun au moins un premier (12) et un deuxième (14) enroulement partiel séparés l'un de l'autre par galvanisation. Ces enroulements partiels (12, 14) sont disposés autour d'un axe d'enroulement (22, 81, 89) imaginaire commun. Les premiers enroulements partiels (12) des modules d'enroulements de transformateur (12, 31 - 39, 71 - 78) sont électriquement connectés en série et les deuxièmes enroulements partiels (18 ) sont électriquement connectés en parallèle.
PCT/EP2008/003824 2008-05-13 2008-05-13 Connexion de modules d'enroulements de transformateur Ceased WO2009138099A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/EP2008/003824 WO2009138099A1 (fr) 2008-05-13 2008-05-13 Connexion de modules d'enroulements de transformateur
DE112008003836T DE112008003836A5 (de) 2008-05-13 2008-05-13 Koppelung von Transformatorwicklungsmodulen
PCT/EP2008/010246 WO2009138116A1 (fr) 2008-05-13 2008-12-04 Noyau de transformateur polygonal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/003824 WO2009138099A1 (fr) 2008-05-13 2008-05-13 Connexion de modules d'enroulements de transformateur

Publications (1)

Publication Number Publication Date
WO2009138099A1 true WO2009138099A1 (fr) 2009-11-19

Family

ID=40417304

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/003824 Ceased WO2009138099A1 (fr) 2008-05-13 2008-05-13 Connexion de modules d'enroulements de transformateur

Country Status (2)

Country Link
DE (1) DE112008003836A5 (fr)
WO (1) WO2009138099A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2405451A1 (fr) * 2010-07-10 2012-01-11 ABB Technology AG Transformateur mono- ou multiphasé doté d'au moins deux bobines
EP2808879A1 (fr) * 2013-05-29 2014-12-03 ABB Technology AG Agencement d'enroulements d'un transformateur d'isolation haute tension
CN102971810B (zh) * 2010-07-10 2016-11-30 Abb技术有限公司 具有至少两个线圈的单相或多相干式变压器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451023A (en) * 1965-12-21 1969-06-17 English Electric Co Ltd Toroidal winding structures
DE2936897A1 (de) * 1979-09-12 1981-03-19 Transformatoren Union Ag, 7000 Stuttgart Drehstrombank aus drei einphasentransformatoren mit je zwei bewickelten kernschenkeln
US4779812A (en) * 1982-01-06 1988-10-25 Kuhlman Corporation Toroidal electrical transformer and method of producing same
EP0557549B1 (fr) * 1992-02-26 1995-08-30 HANSER, Volker Transformateur à noyau annulaire
DE10353529A1 (de) * 2002-11-15 2004-06-03 Delta Electronics, Inc. Transformator mit Spulenmodulen und Verfahren zur Herstellung eines solchen Transformators
GB2409115B (en) * 2003-12-09 2006-11-01 Nujira Ltd Transformer based voltage supply

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451023A (en) * 1965-12-21 1969-06-17 English Electric Co Ltd Toroidal winding structures
DE2936897A1 (de) * 1979-09-12 1981-03-19 Transformatoren Union Ag, 7000 Stuttgart Drehstrombank aus drei einphasentransformatoren mit je zwei bewickelten kernschenkeln
US4779812A (en) * 1982-01-06 1988-10-25 Kuhlman Corporation Toroidal electrical transformer and method of producing same
EP0557549B1 (fr) * 1992-02-26 1995-08-30 HANSER, Volker Transformateur à noyau annulaire
DE10353529A1 (de) * 2002-11-15 2004-06-03 Delta Electronics, Inc. Transformator mit Spulenmodulen und Verfahren zur Herstellung eines solchen Transformators
GB2409115B (en) * 2003-12-09 2006-11-01 Nujira Ltd Transformer based voltage supply

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2405451A1 (fr) * 2010-07-10 2012-01-11 ABB Technology AG Transformateur mono- ou multiphasé doté d'au moins deux bobines
WO2012007101A1 (fr) * 2010-07-10 2012-01-19 Abb Technology Ag Transformateur sec monophasé ou polyphasé doté d'au moins deux bobines
CN102971810A (zh) * 2010-07-10 2013-03-13 Abb技术有限公司 具有至少两个线圈的单相或多相干式变压器
US9214265B2 (en) 2010-07-10 2015-12-15 Abb Technology Ag Single- or multi-phase dry-type transformer having at least two coils
CN102971810B (zh) * 2010-07-10 2016-11-30 Abb技术有限公司 具有至少两个线圈的单相或多相干式变压器
EP2808879A1 (fr) * 2013-05-29 2014-12-03 ABB Technology AG Agencement d'enroulements d'un transformateur d'isolation haute tension
WO2014191068A1 (fr) * 2013-05-29 2014-12-04 Abb Technology Ag Agencement d'enroulements de transformateur à isolation haute tension

Also Published As

Publication number Publication date
DE112008003836A5 (de) 2011-02-24

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