EP4312236A1 - Boîtier de transformateur, transformateur doté d'un tel boîtier de transformateur et agencements de ce boîtier de transformateur - Google Patents

Boîtier de transformateur, transformateur doté d'un tel boîtier de transformateur et agencements de ce boîtier de transformateur Download PDF

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Publication number
EP4312236A1
EP4312236A1 EP23184464.8A EP23184464A EP4312236A1 EP 4312236 A1 EP4312236 A1 EP 4312236A1 EP 23184464 A EP23184464 A EP 23184464A EP 4312236 A1 EP4312236 A1 EP 4312236A1
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EP
European Patent Office
Prior art keywords
transformer
housing
phase change
metal foam
transformer housing
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.)
Pending
Application number
EP23184464.8A
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German (de)
English (en)
Inventor
Matthias Löbermann
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.)
Tennet Tso GmbH
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Tennet Tso GmbH
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 Tennet Tso GmbH filed Critical Tennet Tso GmbH
Publication of EP4312236A1 publication Critical patent/EP4312236A1/fr
Pending legal-status Critical Current

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    • 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
    • H01F27/025—Constructional details relating to cooling
    • 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
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/18—Liquid cooling by evaporating liquids
    • 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

Definitions

  • the invention relates to a transformer housing with a metal foam implemented within the transformer housing, a transformer with such a transformer housing and arrangements of the aforementioned products.
  • the conductor coils of the power transformer are usually wound on a U-shaped iron core profile and the magnetic circuit to be formed is then closed with an iron yoke arranged on the U-shaped iron core profile. Due to the design, magnetic stray losses occur during operation of the power transformer. These magnetic scattering losses and the low utilization of the iron core of such a power transformer in relation to the conductor length result in a larger thermal loss on the iron core, which, in combination with further thermal losses, leads to heating of the power transformer.
  • the power transformers are usually filled with oil and have an oil cooling circuit that is actively operated with oil pumping equipment. This is by far the most maintenance-intensive part of a power transformer.
  • the number of windings per iron core section is usually chosen to be high in order to achieve the highest possible utilization of the magnetic field. This creates very compact winding structures, which, due to their compactness, lead to a concentration of thermal power loss at these points. These relatively hot spots lead to that the transformer oil of the power transformer and/or the conductor insulation, here the insulating varnish and/or the insulation paper of the conductor, degrades relatively more quickly depending on the mode of operation.
  • the ability to absorb water in the transformer oil also increases, with the water being absorbed in particular by the conductor's insulation paper.
  • the water absorbed reduces the insulation ability and promotes electrical discharges, which can result in defects in the power transformer. An improved dissipation of heat from the power transformer is therefore advantageous.
  • a power transformer with a low operating noise level is therefore extremely advantageous because it can be placed closer to residential buildings.
  • a low operating noise level is also advantageous in the offshore area, particularly in the arrangement of power transformers underwater, as this can ensure a low impact on the underwater fauna.
  • a low operating noise level can therefore simplify or shorten the location selection and the associated approval procedures.
  • the invention is based on the object of designing a transformer housing of the type mentioned in such a way that it has improved heat dissipation, a reduced operating noise level and increased tightness. Furthermore, the object is to provide a transformer with such a housing and arrangements thereof with improved heat dissipation, a reduced operating noise level and increased tightness.
  • a transformer housing is provided with a metal foam implemented within the transformer housing.
  • the transformer housing is double-walled - at least in sections - and thus has - at least in sections and / or at least - a double wall with an inner chamber.
  • the chamber is occupied - at least in sections - by the metal foam.
  • a transformer active part or simply active part regularly comprises a composite of core, windings, pressed parts, in particular press frames and/or press rods and derivation.
  • the metal foam has an acoustically dampening effect, particularly due to the large number of transitions between acoustically dense and thin medium and the associated reflection and interference, so that the operating noise level of a transformer having the transformer housing is reduced.
  • the tightness of the transformer housing can also be increased with the design according to the invention.
  • the transformer housing at least partially encloses a housing interior of the transformer housing, in which at least one transformer active part can be arranged.
  • the interior of the housing is preferably filled with a dielectric insulating medium.
  • the interior of the housing is particularly preferably filled with a transformer oil. This forms the dielectric insulating medium.
  • the respective double wall also has an inner housing wall adjacent to and/or facing the housing interior and an inner housing wall facing the housing interior spaced outer housing wall adjacent to and/or facing the environment or an ambient medium.
  • the insulating medium and/or the transformer oil now enters the chamber filled with the metal foam, for example due to a crack forming in the inner wall of the housing, the insulating medium and/or the transformer oil largely gets caught in the metal foam, with the result that it is less likely to penetrate to the outer wall of the housing and, for example, . B. in turn can emerge from the transformer housing or a transformer having the transformer housing due to cracks that have arisen and / or are present in the outer wall of the housing.
  • the metal foam allows deformation of the double wall and in particular the outer housing wall and/or can serve as a crumple zone in the event of a shock from an object and/or an impact of an object on the double wall and in particular the outer housing wall.
  • the energy of the shock and/or impact is reduced, whereby particularly extensive damage resulting from the formation of cracks or openings in the double wall and in particular in the outer housing wall can be avoided.
  • This also allows the tightness of the transformer housing to be increased.
  • the transformer housing can basically have any shape. What is conceivable here is, for example, a substantially rectangular and/or cuboid design of the transformer housing. A cylindrical design is also conceivable.
  • the transformer housing can also be annular and/or hollow cylindrical, such an annular and/or hollow cylindrical transformer housing having a radially inner and a radially outer double wall. These double walls and in particular a respective outer housing wall then border on the environment and/or an ambient medium.
  • the metal foam lies directly on the double wall, here in particular on an inner housing wall forming the double wall and an outer housing wall, at least in one, in particular first - thermal - operating point and/or, in particular first - thermal - operating region of the transformer housing .
  • the metal foam is in a further, in particular second - thermal - operating point and/or - thermal - operating range, in which lower temperatures are present than in the in particular first - thermal - operating point and / or in particular first - thermal - operating range, is not or only partially in contact with the double wall.
  • the metal foam would only come into contact with the double wall during the transition from the second to the first - thermal - operating point and / or - thermal - operating range, ie in particular when there is heating and an associated expansion of the transformer housing, and then in particular in the first - thermal - operating point and / or in particular first - thermal - operating range rest on the double wall.
  • the metal foam is always, i.e. H. in each - thermal - operating point and/or - thermal - operating range on a respective double wall, i.e. H. on the inner wall of the housing and the outer wall of the housing.
  • a further advantageous embodiment of the invention is that the metal foam is an open-pored metal foam.
  • the design as an open-pore metal foam offers the advantage that additional materials can be introduced or stored in the pores of the metal foam. These materials could serve to further increase the thermal conductivity of the metal foam and thus the heat dissipation from the transformer housing and/or a transformer having the transformer housing. It would also be conceivable that the material serves to increase the tightness and/or the acoustic damping and thus to reduce the operating noise level of the transformer housing and/or a transformer having the transformer housing.
  • An embodiment of the invention also proves to be promising if the metal foam is made of aluminum.
  • Aluminum has an extremely advantageous high thermal conductivity or a high thermal conductivity coefficient.
  • metal foam made of aluminum i.e. an aluminum foam
  • better heat transport can be achieved from the interior of the housing to the environment and/or an ambient medium than would be possible, for example, with a solid wall made of steel.
  • the metal foam is in the form of at least one mat, in particular one mat or several mats, is introduced into the chamber.
  • This offers the advantage that the transformer housing with different thicknesses or chamber thicknesses can be filled with metal foam without having to provide a metal foam with an individual, corresponding thickness for each thickness of a chamber.
  • the mats on the other hand, can be easily adapted to the thickness of the chamber in several rows and/or when cut to size. This advantageously reduces the manufacturing costs for the transformer housing.
  • a further development can also be viewed as promising if a phase change material is embedded and/or deposited in the cavities or spaces of the metal foam, in particular the open-pored metal foam, and/or on its surface.
  • phase change material By storing and/or depositing the phase change material in the metal foam, it is extremely advantageous to further increase the heat transfer or heat dissipation, in particular from the inside of the housing, the tightness of the transformer housing and the acoustic damping of the transformer housing and thus the operating noise level of the transformer housing and/or or a transformer having the transformer housing.
  • the phase change material forms a latent heat storage and/or a latent cold storage.
  • the phase change material preferably forms a latent cold storage.
  • a transformer here in particular a power transformer
  • a heating cycle and a cooling cycle alternately due to changing loads, with a - thermal - operating point and / or - thermal - at a respective end and / or beginning of such a cycle.
  • Operating range of the transformer housing and / or a transformer having the transformer housing is present, in which a temperature and / or a temperature range prevails.
  • the phase change material is chosen in such a way that it is present in a different phase at the end and/or beginning of a respective cycle and thus in different - thermal - operating points and / or - thermal - operating areas and consequently in the cycles or a transition between the - thermal - operating points and / or - thermal - operating areas a phase transition or phase change takes place.
  • the temperature of the phase change material - as is known - remains constant, with the recorded and / or Heat released, i.e. thermal energy, during the phase change, in particular significantly exceeds the heat absorbed and/or released between the - thermal - operating points and / or - thermal - operating areas and the phase change.
  • the phase change can be used to very advantageously dissipate heat from the interior of the transformer housing, preferably from the transformer oil of a transformer having the transformer housing.
  • the thermal activation of the cold storage is homogenized in the spatial structure, corresponding to the metal foam. This means a z.
  • Heating of the phase change material, in particular within a heating cycle, takes place largely homogeneously over the thickness of the chamber due to the storage and / or attachment to the metal foam.
  • a progressive phase change, in particular starting on the inner wall of the housing, would be avoided in this way, which advantageously represents a short response time to a heating cycle and thus a load change of a transformer having the transformer housing.
  • a section of the metal foam with the phase change material directly adjacent to the outer wall of the housing can have a temperature and/or a temperature range due to the existing heat dissipation , in which the phase change material does not undergo a phase change and is therefore, in particular, always in its first phase.
  • phase change material which is in a first phase, initially heats up while absorbing heat from the interior of the housing until this has reached the phase transition point.
  • phase transition point When the phase transition point is reached, this now changes from the first phase into a second phase with further absorption of heat from the interior of the housing, with the temperature of the phase change material - as is known - remaining constant during the phase transition. After the phase change has taken place, the temperature of the phase change material would increase again.
  • the load change occurs accordingly from a low load, in which a temperature of the phase change material is below the phase transition point, to a higher and/or high load, due to which a temperature of at least parts of the phase change material is reached corresponding to and/or above the phase transition point.
  • phase transition or a phase change between liquid and gaseous could be carried out by the phase change material and/or could be carried out by the phase material.
  • a further particularly advantageous embodiment of the invention is preferably that a phase change between solid and liquid can be carried out by the phase change material, in particular in at least one - thermal - operating point and / or operating range of the transformer housing or a transformer having the transformer housing and/or is carried out by the phase material.
  • the design of a phase change between solid and liquid offers the advantage of increased tightness of the transformer housing or a transformer having the transformer housing.
  • the phase change material can thus penetrate into existing or created cavities, in particular cracks, in the double wall, here in the inner wall of the housing and/or in the outer wall of the housing, and close these, in particular after a new phase change into the solid phase.
  • phase change material is, for example, pasty and/or waxy.
  • the phase change material can also increase the tightness on its own, for example due to its material properties. It is therefore conceivable that the phase change material is hydrophobic and thus also minimizes penetration of an ambient medium such as water into the transformer housing or a transformer having the transformer housing.
  • the metal foam with the embedded and/or attached phase change material is - essentially - incompressible. This can be critical in the operation of a transformer having the transformer housing, since there is a temperature gradient from the inside of the housing to the environment and/or an ambient medium and thus also between the inner wall of the housing and the outer wall of the housing. This temperature gradient causes a different thermal expansion of the double wall, here consequently the inner wall of the housing and the outer wall of the housing, which in turn causes pressure on the metal foam with the phase change material. If the metal foam cannot escape with the phase change material, this would, in the worst case scenario, result in damage and/or even destruction of the transformer housing due to its incompressibility.
  • At least one area without metal foam and/or phase change material i.e. in particular at least one at least partially gas-filled or air-filled area, is formed in the metal foam embedded and/or attached with phase change material. Due to the lack of filling of the areas with metal foam and/or phase change material, the metal foam present in the remaining areas with the phase change material can expand into the compressible areas without metal foam and/or phase change material, so that any resulting pressure on the double wall can be avoided or is avoided.
  • At least one area without phase change material also includes an insert made of a closed-cell metal foam, in particular a closed-cell aluminum foam.
  • a closed-cell metal foam in particular a closed-cell aluminum foam.
  • a further promising embodiment of the invention is that the transformer housing has a gas-filled or air-filled compensation space, in particular a head space, towards and/or into which the metal foam and/or the phase change material can be stretched or expanded. This also makes it possible, taken alone or in combination with at least one area without a metal foam and/or a phase change material, to avoid pressure arising on the double wall due to uneven thermal expansion of the double wall.
  • the phase change material is also paraffin.
  • the paraffin is ideally suited as a phase change material, as the phase change of the paraffin can be implemented in a range from 25 °C to 60 °C with the associated formation of a self-regulating (latent) heat and/or cold storage.
  • the phase transition point of the paraffin can thus be adapted to the - thermal - operating points and / or operating ranges of the transformer housing and / or a transformer having the transformer housing, so that at least part of the paraffin, but preferably largely or completely, in a particularly first - thermal - operating point and/or a particularly first - thermal - operating range of the transformer housing or a transformer having the transformer housing is present in the liquid phase above the phase transition point.
  • the temperature and/or the temperature range of the paraffin in the liquid phase can be between 20°C and 70°C, preferably 25°C and 65°C, particularly preferably 35°C and 65°C.
  • the temperature and/or the temperature range of the paraffin in the solid phase can be between 0 °C and 25 °C, preferably 2 °C and 20 °C, particularly preferably 2 °C and 15 °C.
  • the invention can also include a transformer with an aforementioned transformer housing, in particular a transformer housing according to claims 1 to 12.
  • a transformer can have an overpressure within the transformer housing, for example in the head space and/or the chamber between the double wall, in order to minimize the probability of a leakage of dielectric insulating medium, in particular transformer oil, or even to avoid such a leakage.
  • An active oil circuit or forced convective cooling of transformer active parts can be dispensed with due to the inventive design of the transformer housing and/or the transformer.
  • a transformer in particular a power transformer, is therefore provided, wherein the transformer has a transformer housing according to the invention and the transformer is also designed to be stackable.
  • the stackability of the transformer can z. B. be given by running the high-voltage connections from the side of the transformer housing.
  • corresponding spacers and/or anchors can be provided on the transformer housing, via which at least two transformers can be connected to one another.
  • an excess pressure can also be present within the transformer housing, for example in the head space and/or the chamber between the double wall, in order to reduce the likelihood of dielectric leakage Insulating medium, especially transformer oil, to minimize or even avoid such a leak.
  • An active oil circuit or forced convective cooling of transformer active parts can in turn be dispensed with due to the inventive design of the transformer housing and/or the transformer.
  • heat dissipation from the transformer in particular can be further improved, since when a stack of transformers is implemented, increased convection and / or, with appropriate arrangement, a chimney effect to increase the heat dissipation from the double wall of a transformer housing and in particular the Housing outer wall is present and / or can be used.
  • an arrangement of at least two aforementioned transformers according to the invention is provided, these being stacked one above the other to form a transformer stack or several such transformer stacks.
  • stacking transformers leads to an increase in heat dissipation from the stacked transformers due to increased convection.
  • a chimney effect can also be created and thus the heat dissipation can be increased even further.
  • the increased mass of such a transformer stack also allows the operating noise level of the transformer stack to be minimized.
  • the design of a transformer stack is also advantageous in terms of minimizing the space or area required for an installation area. This applies both on land and in the offshore area, either on an offshore platform or underwater.
  • the transformer also has at least one transformer active part inside the transformer housing, which z. B. can have a U-core profile or an E-core profile with windings applied to the U-core or E-core. It is also conceivable to design it as a toroidal core transformer or a quasi toroidal core transformer. This would be the quasi toroidal transformer respectively Polygonal transformer made up of individual, in particular linear or arcuate iron core segments with windings at least partially applied to the iron core segments. The iron core segments can be connected to one another via iron core segment locks to form a closed magnetic circuit.
  • an arrangement and/or use of a transformer housing according to the invention, a transformer according to the invention or an arrangement of transformers according to the invention to form a transformer stack is provided, wherein the transformer housing, the transformer or the arrangement to form a transformer stack is arranged and/or used underwater becomes.
  • the transformer housing or the transformer having the transformer housing and / or a transformer stack made of these is extremely advantageous for underwater arrangement. In this way, any negative impact on the underwater flora and fauna can be advantageously minimized.
  • the existing ambient medium of water then also causes a further improvement in heat dissipation from the inside of the housing and thus improved cooling of transformer active parts.
  • the Figure 1 shows an embodiment of a stackable transformer 12, here a power transformer, in a schematically very simplified cross section.
  • the transformer 12 has the transformer housing 6, the transformer housing 6 with the double wall 2 consequently being double-walled and thereby having the inner chamber 6c.
  • the chamber 6c is occupied by the open-pored metal foam 1, which, as shown, lies against the double wall 2 at every operating point of the transformer 12.
  • the metal foam 1 In order to ensure the best possible heat conduction through the metal foam 1, it is made of aluminum.
  • the double wall 2 each has the housing inner wall 15 and the housing outer wall 16 spaced apart from the housing inner wall 15, between which the chamber 6c is correspondingly formed.
  • the phase change material 5 is also embedded and deposited in the spaces 4 of the open-pored metal foam 1 as well as on its surface, with a phase change between solid and liquid being able to be carried out by the phase change material 5 in a - thermal - operating point of the transformer 12.
  • the phase change material 5 is a paraffin 11.
  • the transformer active part 18 shown is arranged, which is surrounded by the dielectric insulating medium 7, here the transformer oil 19, which, in addition to the insulating function, also functions as a cooling medium for the transformer active part 18.
  • Such a transformer 12 is subject to changing loads, e.g. B. changing network loads, usually alternating between a heating cycle and a cooling cycle.
  • changing loads e.g. B. changing network loads
  • the load on the transformer 12 increases and the transformer active part 18 begins to heat up, which is caused by the transformer active part 18 generated heat is absorbed via the transformer oil 19, in particular convectively, and transferred to the housing inner wall 15, which in turn leads to heating of the housing inner wall 15.
  • phase change material 5 is heated until it has reached its phase transition point, in this case its melting point.
  • phase change material 5 now passes from its first, here solid phase into its second, here liquid phase, with further absorption of heat from the housing interior 17 or from the housing inner wall 15, the temperature of the phase change material 5 during the phase transition - as is well known - remains constant.
  • the heat absorbed by the phase change material 5 to complete the phase change or phase transition significantly exceeds the heat absorbed up to the phase transition point by the phase change material 5 and/or the metal foam 1. In this way and in combination with the transfer of heat through the metal foam 1 to the housing outer wall 16, a disproportionately improved heat dissipation from the housing interior 17 and in particular the transformer oil 19 can be ensured.
  • the tightness of the transformer 12 and in particular the transformer housing 6 is also improved by the design of the metal foam 1 and the phase change material 5 incorporated and/or deposited therein, here the paraffin 11.
  • the transformer 12 is subject to heating and cooling cycles, as a result of which the inner housing wall 15 in particular also heats up and cools down alternately.
  • the housing wall 15 also alternately expands and contracts again, which can cause cracks, in particular microcracks, in the material of the housing wall 15.
  • These cracks are now penetrated and/or filled by the phase change material 5 during the transition of the phase change material 5 into its liquid phase and thus in particular also during cooling and the associated transition of the phase change material 5 sealed into the solid phase. This significantly minimizes or even prevents the insulating medium 7, here the transformer oil 19, from escaping from the housing interior 17.
  • the section of the phase change material 5, here the paraffin 11, which is closely adjacent to the housing outer wall 16 is water in a body of water such as a lake or preferably a sea, in which the transformer 12, for example, due to the low regular temperature of the ambient medium 8 .
  • B. would preferably be arranged underwater in an offshore area, in particular always in the solid phase.
  • Damage such as openings and/or cracks in the outer housing wall 15 are thus closed by the pasty or waxy phase change material 5, here in the form of paraffin 11.
  • the paraffin 11 is hydrophobic, which further reduces the probability of penetration of the surrounding medium 8, here water.
  • the housing inner wall 15 is also subject to a higher expansion than the housing outer wall 16 compared to the housing outer wall 16 due to the comparatively greater heating within a heating cycle of the transformer 6, the volume of the chamber 6c is reduced during such a heating cycle.
  • the transformer housing 6 has the compensation spaces 14, towards which and/or into which the Metal foam 1 and/or the phase change material 5 is stretchable.
  • FIG. 3 It can also be seen that in the open-pore metal foam 1 provided with phase change material 5, several areas 9 are formed without phase change material 5.
  • these areas 9 without phase change material 5 include inserts 10 made of a closed-cell metal foam 1, which has gas-filled and in particular air-filled pores. This makes it possible to do this even without executing the in Figure 1 shown compensation spaces 14 an extension of the also in Figure 1 housing inner wall 15 set out can be ensured without damage to the transformer housing 6 occurring due to incompressibility of the filling medium 6d made of metal foam 1, phase change material 5 and inserts 10. Due to the compressibility of the gas enclosed in the pores of the closed-cell metal foam 1, in particular air, the inserts 10 enable the filling medium 6d to be compressed.
  • a transformer stack 13 now emerges, which is an arrangement of several stacked one on top of the other and from the Figure 1 known transformers 12 includes.
  • improved heat dissipation from the housing interior 17 of the transformers 12 can be achieved through the resulting natural convection of the surrounding medium 8 along the transformer stack 13.
  • the convection is in the Figure 4 indicated by arrows.
  • the transformer stack 13 is arranged underwater, so that the ambient medium 8 in this embodiment of the arrangement of the transformer stack 13 is water, in particular seawater. Due to the arrangement of the transformers 12 as a transformer stack 13, there is also a very small space or area requirement for the large number of transformers 12. This is particularly the case when arranged in a sea, e.g. B.
  • the transformer stack 13 is connected to the base plate 21 via the stand structure 20, which is essentially permeable to the surrounding medium 8. This also enables heat to be dissipated on the bottom side of the lowest transformer 12, which is arranged adjacent to the base plate 21.
  • the transformer stack 13 has the compensation container 22 at its uppermost position, i.e. the position furthest away from the base plate 21 for the dielectric insulating medium 7, here the transformer oil 19.
  • the transformer housing is in the Figure 5 shown in horizontal section and designed as annular or hollow cylindrical.
  • the transformer housing thus has a - radially - inner and a - radially - outer double wall.
  • the inner chamber 6c is formed, which is filled with the filling medium 6d made of the thermally conductive open-pored metal foam and the intermediate space filling paraffin.
  • the dielectric insulating medium 7 is carried out inside the housing between the double walls.
  • metal sheets that are flush with the surface of the chambers 6c or the double walls can be designed inside the housing.
  • the transformer housing is also surrounded by the ambient medium 8. This applies both outside and in the annular space.
  • the annular space is the radially inner and/or central space of the transformer housing.
  • a respective housing wall comprises a double wall with the filling medium 6d of the inner chamber 6c.
  • the Figure 6 again shows a transformer stack consisting of several transformers with the dielectric insulating medium 7 inside the housing in the form of the stacked rings 6.1.
  • the transformers are therefore designed as ring transformers with, in particular, ring-shaped transformer active parts.
  • the transformers have corresponding ring-shaped or hollow cylindrical transformer housings.
  • the transformer stack is also connected to the base plate via a support structure.
  • the framework is permeable to the surrounding medium 8. Natural draft cooling - here a convective heat transfer into the surrounding medium - can already occur Figure 5 executed annular space.
  • the oil expansion tank 6.11 is also arranged in the top position of the transformer stack.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
EP23184464.8A 2022-07-13 2023-07-10 Boîtier de transformateur, transformateur doté d'un tel boîtier de transformateur et agencements de ce boîtier de transformateur Pending EP4312236A1 (fr)

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GB489590A (en) * 1936-11-05 1938-07-29 Siemens Ag Improvements in electric inductors adapted to operate at high frequencies
US20170271068A1 (en) * 2016-03-21 2017-09-21 Hubbell Incorporated Noise reducing and cooling enclosure
EP2856477B1 (fr) * 2012-06-05 2017-10-18 Siemens Aktiengesellschaft Cuve pour transformateurs ou bobines d'arrêt remplis de liquide
CN207165354U (zh) 2017-08-31 2018-03-30 江苏中天伯乐达变压器有限公司 泡沫铝吸音干式变压器外壳
CN110534293A (zh) * 2019-09-20 2019-12-03 徐州科奥电气有限公司 一种容错水下变压器
CN215731269U (zh) * 2021-04-30 2022-02-01 中国电力科学研究院有限公司 一种低噪声电力变压器油箱
DE112009005222B4 (de) 2009-09-11 2022-12-29 Hitachi Energy Switzerland Ag Transformator mit einem Wärmerohr und Verfahren zur Herstellung eines Transformators

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB489590A (en) * 1936-11-05 1938-07-29 Siemens Ag Improvements in electric inductors adapted to operate at high frequencies
DE112009005222B4 (de) 2009-09-11 2022-12-29 Hitachi Energy Switzerland Ag Transformator mit einem Wärmerohr und Verfahren zur Herstellung eines Transformators
EP2856477B1 (fr) * 2012-06-05 2017-10-18 Siemens Aktiengesellschaft Cuve pour transformateurs ou bobines d'arrêt remplis de liquide
US20170271068A1 (en) * 2016-03-21 2017-09-21 Hubbell Incorporated Noise reducing and cooling enclosure
CN207165354U (zh) 2017-08-31 2018-03-30 江苏中天伯乐达变压器有限公司 泡沫铝吸音干式变压器外壳
CN110534293A (zh) * 2019-09-20 2019-12-03 徐州科奥电气有限公司 一种容错水下变压器
CN215731269U (zh) * 2021-04-30 2022-02-01 中国电力科学研究院有限公司 一种低噪声电力变压器油箱

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