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EP2511919A1 - Chauffage de transformateur sec - Google Patents

Chauffage de transformateur sec Download PDF

Info

Publication number
EP2511919A1
EP2511919A1 EP11003004A EP11003004A EP2511919A1 EP 2511919 A1 EP2511919 A1 EP 2511919A1 EP 11003004 A EP11003004 A EP 11003004A EP 11003004 A EP11003004 A EP 11003004A EP 2511919 A1 EP2511919 A1 EP 2511919A1
Authority
EP
European Patent Office
Prior art keywords
transformer
dry
winding
insulating layer
heater according
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Withdrawn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
EP11003004A
Other languages
German (de)
English (en)
Inventor
Benjamin Weber
Bhavesh Patel
Burak Esenlik
Frank Cornelius
Jens Dr. Tepper
Marcos Dr. Bockholt
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 EP11003004A priority Critical patent/EP2511919A1/fr
Priority to PCT/EP2012/001088 priority patent/WO2012139688A1/fr
Priority to CN201280017870.9A priority patent/CN103460310B/zh
Publication of EP2511919A1 publication Critical patent/EP2511919A1/fr
Priority to US14/052,285 priority patent/US9171662B2/en
Withdrawn legal-status Critical Current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
    • H01F27/008—Details of transformers or inductances, in general with temperature compensation
    • 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
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means

Definitions

  • the invention relates to a dry-transformer heater, comprising a closed housing, at least one transformer winding arranged therein with at least one winding conductor each and an insulating layer surrounding each of these.
  • dry-type transformers For certain applications, it is necessary to encapsulate dry-type transformers, that is to say to arrange them within a closed housing. This may be the case, for example, with dry-type transformers operating within a very cold working environment or on a ship or an oil rig and against the effects of saline seawater.
  • an encapsulation may occasionally be required alone because of their mechanical protection.
  • an encapsulated transformer is subject to frequent use downtime due to use, it may lead to the formation of condensation inside the transformer housing, since the transformer then cools due to the lack of heating the winding losses.
  • a housing in the context of this invention may mean both that the transformer winding is fixedly arranged in this housing and is movable therewith. But it is also meant that a transformer winding or even the entire transformer is arranged in a closed space, which actually does not belong directly to the transformer. This can be, for example, a locked room in the hull of a ship or even a room within a building.
  • the means for the direct primary input of the heat output into the insulating layer can be regulated independently of the electrical operation of the transformer winding. This allows for both the operation of the dry-type transformer heating as pure standstill heating, as well as supplementary heating during transformer operation.
  • the transformer windings are lossy, so that when operating the transformer in the transformer windings generates a heating power. Depending on the outside temperature and resulting power loss this may already be sufficient to prevent condensation, but if necessary, an additional heating power of the dry-transformer heating may be necessary.
  • the means for the direct primary input of the heat output can be specifically controlled in such a way that a sufficiently high temperature above the dew point is ensured.
  • the dry-type transformer heating therefore at least one temperature sensor is provided and means to regulate the registered heat output such that the temperature of the insulating layer is above the respective dew point.
  • a control and / or regulating device is to be provided, which predetermines the registered heating power as a function of the measured temperature in accordance with a specific control characteristic.
  • Preferred arrangement points for one or more temperature sensors are the inner wall region of the housing above the transformer core or the transformer windings, because condensation occurring there would disadvantageously drip onto the high-voltage windings and in extreme cases could lead to a short circuit or other fault, for example.
  • At least one coil heating wire is arranged on the surface of the insulating layer as a means for the direct primary input of the heat output.
  • a SpulenMapdraht is an electrical conductor, which heats up due to its internal resistance during flow of an electric current accordingly.
  • a daily application to the insulating layer of a transformer winding is not critical, if necessary, this can also be a suitable temperature-resistant and thermally conductive adhesive can be used. Due to the insulating layer, which surrounds the transformer winding, no isolation problems with the winding conductor of the transformer winding are to be expected. In this way, a targeted heat input is made possible on the surface of the high-voltage winding that is particularly critical with respect to condensation.
  • the SpulenMapdraht is flat, in particular with predominantly parallel track distances, arranged on the surface, so that it can be heated according to homogeneous.
  • At least one coil heating wire is arranged within the insulation layer. This must then be inserted in the production of the insulation directly into this, which is technically but unproblematic production, because appropriate winding machines for the production of the transformer winding anyway available stand.
  • An insulating layer usually consists of a multi-layer wound resin-impregnated fiber roving, wherein the SpulenMapdrumblete are then bring relatively close to the surface. In this way, the heating wires are on the one hand protected by the insulating layer, on the other hand, a more homogeneous distribution of a demand-generated heating power is guaranteed.
  • the advantages of a coil heating wire arranged in this way correspond to the advantages of a heating wire arranged on the coil surface.
  • a combination of both arrangement variants is possible or else the arrangement of several SpulenMapdrahtten to the same high-voltage winding.
  • At least one coil heating wire is laid at least in sections in meandering fashion. This allows a particularly homogeneous heating of the corresponding portion of the surface of the high-voltage winding or of its surrounding insulating layer.
  • the spacing between adjacent Spulenurbandrahtabitese is compressed in certain areas of the insulating layer, which applies to both Spulenurbandrumblete within the insulating layer and outside of the insulating layer.
  • a surface area with denser coil heating wires is provided in surface areas in which a higher entry of heat output makes sense, for example at the terminals of the high-voltage winding. In less critical areas, it is sufficient to lay the coil heating wires less tightly.
  • At least one coil heating wire is electrically connected to a winding conductor of the transformer winding.
  • the arrangement of the SpulenMapdrumblete within the insulation layer is preferable here.
  • the SpulenMapdraht is set to a defined potential and further reduces the risk of insulation breakdowns to the winding conductor. It should be noted, however, that a voltage source which is provided for a current flow through the SpulenMapdraht must also be set to the conductor potential. This is not always advantageous.
  • At least one Spulenurbandraht an electrically short-circuited loop is formed, which is arranged such that when operating the transformer winding, a voltage in the loop is induced.
  • This has accordingly at least in sections a Wickelsinn, which corresponds to that of the winding conductor of the transformer winding.
  • the electrically short-circuited loop is variable in its electrical resistance by a series-connected electrical component.
  • a component may for example be a switch, by means of which the winding can be activated as needed. But it can also be a variable resistor or a power electronic circuit, which fulfills this purpose. The latter is characterized in particular by a good controllability.
  • an electrical voltage source is provided for generating a current flow through at least one heating wire.
  • this can either be a constant voltage source or else a controllable voltage source.
  • At least one UV emitter directed onto the insulation layer is provided. This is arranged for example on an inner side wall of the housing.
  • the UV rays generate a heat input when they hit the insulation layer directly.
  • at least one such UV radiator is necessary, that is to say in total of at least six.
  • each transformer winding or the surrounding insulating layer is provided with respective means for recording a heat output.
  • Fig. 1 shows a lateral section 10 through a first encapsulated dry-type transformer according to the prior art.
  • a dry-type transformer is arranged, of which the transformer core is designated by the reference numeral 16 and a transformer winding arranged above a leg of the transformer core 16 is designated by the reference numeral 14.
  • two heating elements 18, 20 are arranged, which in two respective radiating areas indicated by the reference numerals 22 and 24 irradiate the lateral areas of the housing 12, but not the dry-type transformer located therein.
  • condensation is indeed avoided, but especially in the middle upper region of the transformer housing, just above the dry transformer is not made for a sufficient entry of heat output, so that there is a condensation, as indicated by the reference numeral 26. This can disadvantageously drip on the underlying transformer and so for example lead to short circuits or malfunction of the dry-type transformer.
  • Fig. 2 shows a lateral section 30 through a second encapsulated dry-type transformer according to the invention.
  • a dry-type transformer with a transformer core 36 and a transformer winding 34 is shown, behind which two further invisible transformer windings are arranged.
  • two areas 38 and 42 are indicated, in each of which a SpulenMapdraht is arranged meandering.
  • a narrow meandering shape 40 is selected, while in the second region 42 a further meandering shape 44 is selected. The entry of heat output per surface unit is thus correspondingly higher in the first region 38.
  • the heated transformer coil 34 outputs, primarily by rising of heated at the outer surface of the insulating layer of air, a portion of the registered thermal power to the located above the transformer roof part of the transformer housing 32, which is then also heated, as indicated by the radiating region with the reference numeral 48 , Therefore, especially at the particularly critical housing area above the transformer such a high temperature is reached that its temperature is above the respective dew point temperature.
  • the formation of condensation is indicated at the respective ceiling areas by the reference numeral 46. However, this is harmless because it drips into areas of the housing 32 where no transformer winding is arranged.
  • Fig. 3 shows a section 50 through a third encapsulated dry-type transformer in a plan view.
  • a closed housing 58 three hollow cylindrical transformer windings 52, 54, 56 are arranged side by side, wherein a corresponding transformer core is not shown for illustrative reasons.
  • the transformer windings 52, 54, 56 are surrounded radially on the outside by a respective insulation layer 60.
  • a plurality of Spulenchaindrumblete are indicated by the reference numeral 66, which are arranged in this example along the axial extent of the respective transformer windings.
  • an arrangement transverse to this is conceivable, especially if a short-circuited induction loop is to be formed. With this it becomes possible, at Operation of the transformer without an additional voltage source to provide an entry of heat output in the insulating layer 60.
  • the transformer winding with the reference numeral 56 is hinted at the side of an infrared heater 62, as indicated by the reference numeral 64. Also in this way a direct primary energy input into the insulating layer 60 is possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Resistance Heating (AREA)
  • General Induction Heating (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Insulating Of Coils (AREA)
EP11003004A 2011-04-11 2011-04-11 Chauffage de transformateur sec Withdrawn EP2511919A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP11003004A EP2511919A1 (fr) 2011-04-11 2011-04-11 Chauffage de transformateur sec
PCT/EP2012/001088 WO2012139688A1 (fr) 2011-04-11 2012-03-10 Chauffage à transformateur sec
CN201280017870.9A CN103460310B (zh) 2011-04-11 2012-03-10 干式变压器加热装置和干式变压器
US14/052,285 US9171662B2 (en) 2011-04-11 2013-10-11 Dry transformer heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11003004A EP2511919A1 (fr) 2011-04-11 2011-04-11 Chauffage de transformateur sec

Publications (1)

Publication Number Publication Date
EP2511919A1 true EP2511919A1 (fr) 2012-10-17

Family

ID=44817001

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11003004A Withdrawn EP2511919A1 (fr) 2011-04-11 2011-04-11 Chauffage de transformateur sec

Country Status (4)

Country Link
US (1) US9171662B2 (fr)
EP (1) EP2511919A1 (fr)
CN (1) CN103460310B (fr)
WO (1) WO2012139688A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3343575A1 (fr) * 2016-12-28 2018-07-04 ABB Schweiz AG Compensateur de pression d'une installation sous-marine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105576354A (zh) * 2015-12-21 2016-05-11 天津中兴智联科技有限公司 用于rfid系统的近场天线

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800612A (en) * 1954-05-05 1957-07-23 Taylor Winfield Corp Control system for the protection of welding transformers
JP2011041437A (ja) * 2009-08-18 2011-02-24 Toshiba Corp 結露状態検出システム

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB371419A (en) * 1930-07-03 1932-04-14 Alfred Schwitzer Improvements in and relating to electrodes for thermionic tubes
US3147744A (en) * 1959-07-27 1964-09-08 Gen Motors Corp Thermal power plant
US3142029A (en) * 1960-08-22 1964-07-21 Gen Electric Shielding of foil wound electrical apparatus
US3264589A (en) * 1963-09-03 1966-08-02 Gen Electric Transformer pockets for vaporized cooling
US7223941B2 (en) * 2003-02-08 2007-05-29 Walker Ip And Business Enterprises, Llc Reduced-volume commercial space heating system and method for manufacturing same
EP2104116B1 (fr) * 2008-03-12 2017-05-10 ALSTOM Transport Technologies Système de refroidissement d'huile, notamment pour transformateurs d'alimentation de moteurs électriques de traction, transformateur avec ce système et procédé pour déterminer le débit de fluide de refroidissement dans un système de refroidissement
US20100038358A1 (en) * 2008-03-20 2010-02-18 Dingle Brad M Inductive soldering device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800612A (en) * 1954-05-05 1957-07-23 Taylor Winfield Corp Control system for the protection of welding transformers
JP2011041437A (ja) * 2009-08-18 2011-02-24 Toshiba Corp 結露状態検出システム

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3343575A1 (fr) * 2016-12-28 2018-07-04 ABB Schweiz AG Compensateur de pression d'une installation sous-marine
WO2018122152A1 (fr) * 2016-12-28 2018-07-05 Abb Schweiz Ag Compensateur de pression d'une installation sous-marine
US11212931B2 (en) 2016-12-28 2021-12-28 Abb Schweiz Ag Subsea installation

Also Published As

Publication number Publication date
CN103460310B (zh) 2016-04-20
WO2012139688A1 (fr) 2012-10-18
US9171662B2 (en) 2015-10-27
CN103460310A (zh) 2013-12-18
US20140035709A1 (en) 2014-02-06

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