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EP2790195A1 - Trockentransformator - Google Patents

Trockentransformator Download PDF

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Publication number
EP2790195A1
EP2790195A1 EP13163557.5A EP13163557A EP2790195A1 EP 2790195 A1 EP2790195 A1 EP 2790195A1 EP 13163557 A EP13163557 A EP 13163557A EP 2790195 A1 EP2790195 A1 EP 2790195A1
Authority
EP
European Patent Office
Prior art keywords
transformer
coil
transformer core
elements
resin casted
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Withdrawn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
EP13163557.5A
Other languages
English (en)
French (fr)
Inventor
Frank Cornelius
Grzegorz Kmita
Michal Kozupa
Robert Platek
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 EP13163557.5A priority Critical patent/EP2790195A1/de
Publication of EP2790195A1 publication Critical patent/EP2790195A1/de
Withdrawn legal-status Critical Current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
    • H01F27/002—Arrangements provided on the transformer facilitating its transport
    • 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
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • 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
    • 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
    • H01F27/33—Arrangements for noise damping
    • 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 is related to a dry transformer, comprising at least one hollow-cylindrical resin casted coil and a transformer core extending at least in part there through, wherein support elements are foreseen to carry the weight of the resin casted transformer coil to the transformer core respectively to mounting elements connected therewith
  • transformers are used in electrical distribution networks to adapt the voltage level inbetween network parts of different rated voltages, for example 30kV or 60kV on the high voltage side and 6kV or 10kV on the low voltage side.
  • Those transformers have typically a rated power in the range of 0,5MVA to 10MVA and are of the type of a dry transformer.
  • the windings of such dry transformers are typically resin casted so that each coil is comparable to a solid hollow cylinder wherein vibration inbetween adjacent loops of the winding are excluded.
  • Transformers are operated with an alternating current voltage of a certain frequency, for example 50Hz or 60Hz, thus during operation a transformer noise of mainly twice the frequency is arising as known by the man skilled in the art.
  • Main source of noise is the transformer core itself.
  • Comparable to a transformer also reactors produce noise during operation.
  • a reactor comprises as well a reactor core as a reactor coil.
  • the wording "transformer" as understood within the frame of the invention covers as well a transformer as
  • a dry transformer of the aforementioned kind This is characterized in that the support elements comprise damping material at least in a section so that transmission of vibrations of the transformer core to the resin casted coil is damped.
  • the basic idea of the invention is based on the fact, that mainly the transformer core itself and not the transformer coils are the source of vibration.
  • a damping is easily realized.
  • Suitable damping material is for example a rubber material.
  • the weight of the transformer coils is not carried directly by the transformer core itself, it is also possible that the weight of the transformer coils is carried - also in part - by some mounting elements, for example a lower press bar of the transformer. Inbetween the mounting elements and the transformer coils the support elements with damping material are foreseen. In the end a mechanical decoupling from the vibrating transformer core to the transformer coils has to be gained.
  • Base condition for the invention is the use of a resin casted coil.
  • the transformer coil has to have a solid, stable form of preferably a hollow cylinder which is not a swinging system itself.
  • the resin of the transformer coil might be enforced with fiber for example and is fixing each winding loop of the transformer coil to each other. So it is ensured that - if the coil is mechanically damped on its lower side - in principal the whole coil is damped.
  • At least one resin casted coil is arranged in upright position wherein the support elements are foreseen at the lower side of the resin casted coil.
  • the upright position of a transformer coil is the most typical working position.
  • fixing elements are foreseen, which are fixing the resin casted coil relative to the transformer core by applying a pressure force and which comprise damping material at least in a section.
  • the fixing elements are foreseen at the upper side of the resin casted coil.
  • a kind of clamping effect is realized for fixing the coil in a desired position.
  • fixing elements are foreseen in radial direction inbetween the inner of the hollow-cylindrical resin casted coil and the part of the transformer core extending there through, typically a respective limb.
  • tilt the transformer for example for purpose of transportation.
  • those radial fixing elements would have the function of support elements carrying the weight of the transformer coil to the transformer core.
  • the transformer core and/or its mounting elements are arranged on damping elements wearing the whole weight of the transformer.
  • the vibrating transformer core is arranged completely damped.
  • the production of noise is reduced by mechanical decoupling the transformer core from the transformer coils and on the other side the transformer core is also decoupled from the ground area where it is arranged, so that the ground area does not vibrate and emits noise therewith.
  • the transformer core and/or its mounting elements are arranged on wheels with damping characteristic wearing the whole weight of the transformer. Wheels are used to make the transformer moveable from one location to another. Making the wheels of rubber material brings additional damping into the vibrating system and reduces noise emission in an advantageous way.
  • FIG. 1 shows an exemplary dry transformer 10 with support elements 18, 26 comprising damping material such as a rubber material.
  • the dry transformer comprises a transformer core 16 with three limbs and two yokes.
  • a hollow-cylindrical resin casted coil 12, 14 is arranged, which comprises in this example as well a primary as a secondary winding.
  • the resin casted coils 12, 14 are in the upright position as indicated with the dotted line 32.
  • respective pressbars 20, 22 are foreseen to give the transformer core 16 an improved stability. Due to the stiff connection the pressbars 20, 22 are subject to the same vibrations than the transformer core 16 itself.
  • the resin casted coils 12, 14 are supported by the support elements 18, 26, which carry the whole weight of the resin casted coils 12, 14 and which comprise a damping material like rubber to mechanically decouple transformer core 16 and resin casted coils 12, 14.
  • the support elements with reference number 18 carry the respective share of the weight of the transformer coils 12, 14 to the transformer core 16, whereas the support elements with reference number 26 are slightly prolonged and carry the respective share of weight to the respective lower pressbar 20.
  • fixing elements 24 are foreseen, which comprise damping material and which apply a pressure force on the resin casted coils 12, 14, which are fixed therewith.
  • the whole transformer is arranged on damping elements 28 respectively damping mats, which are foreseen inbetween lower pressbar 20 and floor 30 in this case.
  • damping elements 28 respectively damping mats, which are foreseen inbetween lower pressbar 20 and floor 30 in this case.
  • Figure 2 shows a sectional view of transformer core extending through resin casted coil in a sketch 40.
  • a primary 42 and secondary 44 winding section of an exemplary resin casted coil is arranged around a limb 46 of a transformer core.
  • a cooling channel with not shown spacer elements is foreseen.
  • Fixing elements 48 with damping material such as rubber are foreseen for the radial fixation of the coil. It is as well possible to handle primary 42 and secondary 44 winding as individual coils with separate support elements as to handle them together as one resin casted part.
  • FIG 3 shows an exemplary dry transformer in a sketch 50.
  • the transformer is similar to the transformer shown in figure 1 , but in this the transformer is arranged on rubber wheels 54, which are wearing the whole weight of the transformer. Additionally optional damping elements 52 are foreseen for each wheel, which also are wearing the whole weight of the transformer. Thus vibrations of the transformer are damped in an advantageous way and noise emission is reduced therewith.
  • exemplary dry transformer with support elements comprising damping material 12 first hollow-cylindrical resin casted coil 14 second hollow-cylindrical resin casted coil 16 transformer core 18 support element comprising damping material at lower side of coil 20 first mounting element (lower pressbar) 22 second mounting element (upper pressbar) 24 fixing element comprising damping material at lower upper side of coil 26 further support element comprising damping material at lower side of coil 28 damping element 30 floor 32 orientation of resin casted coils 40 sectional view of transformer core extending through resin casted coil 42 first winding of resin casted coil 44 second winding of resin casted coil 46 limb of transformer core 48 fixing element between resin casted coil and limb of transformer core 50 dry transformer on wheels 52 damping element 54 rubber wheels

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
EP13163557.5A 2013-04-12 2013-04-12 Trockentransformator Withdrawn EP2790195A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13163557.5A EP2790195A1 (de) 2013-04-12 2013-04-12 Trockentransformator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13163557.5A EP2790195A1 (de) 2013-04-12 2013-04-12 Trockentransformator

Publications (1)

Publication Number Publication Date
EP2790195A1 true EP2790195A1 (de) 2014-10-15

Family

ID=48050612

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13163557.5A Withdrawn EP2790195A1 (de) 2013-04-12 2013-04-12 Trockentransformator

Country Status (1)

Country Link
EP (1) EP2790195A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3091543A1 (de) * 2015-05-05 2016-11-09 ABB Technology AG Transformator für einen modularen, elektronischen stromwandler
CN110911098A (zh) * 2019-10-16 2020-03-24 浙江季布电力工程有限公司 一种电力工程变压器的安装装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1426217A (en) * 1972-09-21 1976-02-25 Transformatoren Union Ag Transformer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1426217A (en) * 1972-09-21 1976-02-25 Transformatoren Union Ag Transformer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3091543A1 (de) * 2015-05-05 2016-11-09 ABB Technology AG Transformator für einen modularen, elektronischen stromwandler
CN110911098A (zh) * 2019-10-16 2020-03-24 浙江季布电力工程有限公司 一种电力工程变压器的安装装置
CN110911098B (zh) * 2019-10-16 2020-08-07 浙江季布电力工程有限公司 一种电力工程变压器的安装装置

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RIN1 Information on inventor provided before grant (corrected)

Inventor name: WEBER, BENJAMIN

Inventor name: KMITA, GRZEGORZ

Inventor name: CORNELIUS, FRANK

Inventor name: PLATEK, ROBERT

Inventor name: KOZUPA, MICHAL

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