EP2869313A1 - 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
EP2869313A1
EP2869313A1 EP20130005136 EP13005136A EP2869313A1 EP 2869313 A1 EP2869313 A1 EP 2869313A1 EP 20130005136 EP20130005136 EP 20130005136 EP 13005136 A EP13005136 A EP 13005136A EP 2869313 A1 EP2869313 A1 EP 2869313A1
Authority
EP
European Patent Office
Prior art keywords
dry
coil
transformer
type transformer
radially
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.)
Granted
Application number
EP20130005136
Other languages
German (de)
English (en)
Other versions
EP2869313B1 (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 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 EP13005136.0A priority Critical patent/EP2869313B1/fr
Priority to ES13005136.0T priority patent/ES2639111T3/es
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.
  • a dry-type transformer coil of the aforementioned type is characterized in that on the radially outer surface of the coil an at least partially encircling barrier structure extending at least over its axial length with at least one layer of strips of an insulating material and at least one is provided radially from this supported barrier wall, wherein the radially outermost barrier wall has an electrical screen.
  • 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 the protective wall carried therefrom is similar to the construction of a cooling channel typically arranged between radially adjacent winding segments of a dry transformer coil 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. As a result, the integrity of the electrical screen is not compromised.
  • the object according to the invention is also achieved by a dry-type transformer comprising a transformer core with at least two core limbs, wherein a dry-type transformer coil according to the invention is arranged around at least one of the at least two core limbs and wherein their respective electrical shield is connected to ground potential.
  • a dry-type transformer coil according to the invention is arranged around at least one of the at least two core limbs and wherein their respective electrical shield is connected to ground potential.
  • 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)
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
EP13005136.0A EP2869313B1 (fr) 2013-10-29 2013-10-29 Bobine de transformateur à sec et transformateur à sec
ES13005136.0T ES2639111T3 (es) 2013-10-29 2013-10-29 Bobina de transformador seco y transformador seco
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 true EP2869313A1 (fr) 2015-05-06
EP2869313B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109215950A (zh) * 2018-11-06 2019-01-15 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
EP3660874A1 (fr) * 2018-11-29 2020-06-03 ABB Schweiz AG Transformateur à sec

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11417456B2 (en) 2017-01-25 2022-08-16 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
US11250990B2 (en) 2017-01-25 2022-02-15 Delta Electronics (Shanghai) Co., Ltd High-voltage transformer and electronic power apparatus
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

Citations (5)

* 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
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
WO2006103193A2 (fr) * 2005-04-01 2006-10-05 Siemens Aktiengesellschaft Transformateur pourvu d'un blindage electrique
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
WO2009126977A1 (fr) * 2008-04-18 2009-10-22 Trench Austria Gmbh Blindage électrostatique pour composant pour transmission d'électricité en courant continu haute tension

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE61693T1 (de) * 1985-04-19 1991-03-15 Siemens Ag Kontaktierung metallbeschichteter kunststoffteile eines wickelkoerpers.
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
PL2428967T3 (pl) * 2010-09-08 2013-10-31 Abb Schweiz Ag Uzwojenie transformatora

Patent Citations (5)

* 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
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
WO2006103193A2 (fr) * 2005-04-01 2006-10-05 Siemens Aktiengesellschaft Transformateur pourvu d'un blindage electrique
WO2009126977A1 (fr) * 2008-04-18 2009-10-22 Trench Austria Gmbh Blindage électrostatique pour composant pour transmission d'électricité en courant continu haute tension

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109215950A (zh) * 2018-11-06 2019-01-15 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
EP3660874A1 (fr) * 2018-11-29 2020-06-03 ABB Schweiz AG Transformateur à sec
WO2020108867A1 (fr) * 2018-11-29 2020-06-04 Abb Schweiz Ag Transformateur sec

Also Published As

Publication number Publication date
EP2869313B1 (fr) 2017-05-31
WO2015062838A1 (fr) 2015-05-07
ES2639111T3 (es) 2017-10-25

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