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EP 3 057 112 B1 |
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EUROPEAN PATENT SPECIFICATION |
(45) |
Mention of the grant of the patent: |
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20.05.2020 Bulletin 2020/21 |
(22) |
Date of filing: 16.02.2015 |
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(51) |
International Patent Classification (IPC):
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(54) |
Oil transformer
Öltransformator
Transformateur à huile
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Designated Contracting States: |
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AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL
NO PL PT RO RS SE SI SK SM TR |
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Date of publication of application: |
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17.08.2016 Bulletin 2016/33 |
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Proprietor: ABB Power Grids Switzerland AG |
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5400 Baden (CH) |
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Inventors: |
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- Schmidt, Thomas
53579 Erpel (DE)
- Düllberg, Ulrich
69493 Hirschberg (DE)
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(74) |
Representative: Wesch, Arno et al |
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Reble & Klose
Rechts- und Patentanwälte
Konrad-Zuse-Ring 32 68163 Mannheim 68163 Mannheim (DE) |
(56) |
References cited: :
EP-A1- 2 133 889 DE-A1- 19 614 775 GB-A- 845 102 NL-A- 6 503 402 US-A1- 2009 242 552
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EP-A1- 2 169 690 GB-A- 383 541 GB-A- 945 688 US-A1- 2008 196 920 US-A1- 2014 240 901
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- BERNT BJERKREIM ET AL: "Ormen Lange Subsea Compression Pilot", OFFSHORE TECHNOLOGY
CONFERENCEM,, no. OTC 18969, 30 April 2007 (2007-04-30), pages 1-11, XP007921105,
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Note: Within nine months from the publication of the mention of the grant of the European
patent, any person may give notice to the European Patent Office of opposition to
the European patent
granted. Notice of opposition shall be filed in a written reasoned statement. It shall
not be deemed to
have been filed until the opposition fee has been paid. (Art. 99(1) European Patent
Convention).
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[0001] The invention is related to an oil transformer according to the preamble of claim
1.
[0003] It is known, that transformers, reactors and other electrical devices used in HV
transmission networks of for example 380kV are typically arranged within an oil filled
vessel. The oil is on one hand insulation medium and on the other hand cooling medium.
An expansion vessel is fluidic connected with the oil filled vessel in order to handle
the thermal expansion of the oil which arises during operation of the respective HV
component, for example an oil transformer. In the frame of this invention the wording
"transformer" has also to be seen as synonym for a reactor and the wording "oil" covers
also comparable insulation fluids such as Ester. Typically cooling means are foreseen
for cooling the oil transformer, mainly heat exchangers, in particular an oil air
heat exchanger or an oil water heat exchanger, or radiators which might be arranged
as a radiator battery.
[0004] An HV oil transformer might have a rated power of several 100MVA, a weight of several
100t, a height of for example 6m and above and a length of 12m and above. Thus the
transportation of such an oil transformer from the factory to site is a challenging
task. In order to facilitate transportation, the attached components such as cooling
means and expansion vessel are transported separately and assembled together with
the main part of the oil transformer on site.
[0005] Disadvantageously within the state of the art is that the attached components are
normally individually designed with respect to individual requirements for the respective
oil transformer. Thus the attached components typically differ in size and shape so
that as well their transport as their assembly on site is rather individual and time
consuming therewith. Also seismic requirements, for example with respect to groundwork
and a stable arrangement, have to be fulfilled when assembling the components to be
attached on site.
[0006] The objective of the invention is to provide an oil transformer with attached components,
which are easier to transport and to easier assemble on site.
[0007] The problem is solved by an oil transformer according to independent claim 1. CSC
means Container Safety Convention wherein the standards related thereto are described
for example in ISO 668.
[0008] Basic idea of the invention is to modularize the components to be attached to an
oil transformer, for example an expansion vessel or the like. All modules have in
common, that they are designed in that way, that they can be transported exactly like
a CSC container. A module comprises a mechanical supporting structure with outer dimensions
like a CSC container and a component of an oil transformer fixedly integrated therein.
[0009] CSC containers are a widely known and standardized transportation medium. A CSC container
complies with standardized dimensions, for example a standardized length of 6,058m
or 12,192m, wherein the height amounts 2,591 m and the width 2,438m. A transport by
ships, trucks or train to any location in the world is possible without any problem.
Thus the transportation of the components to be attached to an oil transformer is
facilitated therewith compared to the transportation in bulky cases as it is common
now.
[0010] According to the invention a respective component to be attached to an oil transformer
is fixedly integrated in the mechanical supporting structure, which is not only of
advantage for an easier transportation, moreover an easier installation on site is
enabled therewith. The mechanical supporting structure enables an easy placing on
site on the four lower corner points. Any complex groundwork is as less required as
a direct assembly with the vessel of the oil transformer. It is also possible to stack
the mechanical supporting structures of several modules easily each on each other.
Only respective fluidic connections in between the oil filled transformer vessel and
the respective mechanical supporting structure have to be mounted on site.
[0011] Typically the mechanical supporting structure is designed in that way, that it has
a comparable life cycle than the oil transformer itself, so that the components fixedly
integrated in the mechanical supporting structure can permanently remain therein.
[0012] According to the present invention, the mechanical supporting structure of the expansion
vessel comprises coupling means at its outer surface which are foreseen as a part
of the fluidic connection in between the expansion vessel and the oil filled vessel,
The first part of the fluidic connection in between the expansion vessel and the coupling
means is integrated in the mechanical supporting structure. So the second part from
the coupling means to the oil filled vessel can easily be carried out comparable to
a plug and play connection.
[0013] Another embodiment of the invention is defined in dependent claim
2.
[0014] Integrating also the cooling means into a mechanical supporting structure of same
dimensions increases the flexibility of the modular system. If required two or more
modules with mechanical supporting structure and fixedly integrated cooling means
can be attached to one oil transformer. Due to the identic dimensions the respective
mechanical supporting structures respectively modules can be placed side by side or
stacked each on each other.
[0015] According to a further embodiment of the invention the at least one cooling means
are a heat exchanger, in particular an oil air heat exchanger or an oil water heat
exchanger. In this case a fluidic connection in between the heat exchanger and the
oil filled vessel is required. A heat exchanger has not necessarily to be placed side
by side to the oil filled vessel, but in order to keep the respective fluidic connection
as short as possible it would be at least of advantage to place it in close proximity.
Optionally pumps or other components which are required to operate the heat exchanger
are integrated in the respective module.
[0016] According to a further embodiment of the invention the mechanical supporting structure
comprises coupling means at its outer face which are foreseen as a part of a fluidic
connection in between the heat exchanger and the oil filled vessel. The first part
of the fluidic connection in between the cooling means and the coupling means is integrated
in the mechanical supporting structure. So the second part from the coupling means
to the oil filled vessel can easily be carried out comparable to a plug and play connection.
[0017] According to another embodiment of the invention the at least one cooling means are
one or more radiators. Radiators should be placed at least in close proximity to the
oil filled vessel in order to increase the cooling effect of the air flow caused by
the radiators. Radiators can be arranged as well with horizontal as with vertical
alignment.
[0018] According to another variant of the invention the radiators are divided into two
groups, which are foreseen to be operated independently each from each other. This
enables an easy adaptation of the cooling power to the actual need for cooling.
[0019] According to the present invention, the mechanical supporting structure comprises
at least one hollow bar, which is as well load bearing as foreseen as a part of the
fluidic connection in between the expansion vessel and the oil filled vessel. Thus
it is possible to reduce the effort for the fluidic connection by integrating the
functionality of a pipe into the load bearing hollow bar of the mechanical support
structure.
[0020] Another embodiment of the invention is defined in dependent claim 7.
[0021] This increases once again the flexibility of the modular system. Even an empty mechanical
supporting structure could be used to lift one or more modules stacked thereon in
a suitable height.
[0022] A suitable height for an expansion vessel is above the top of the oil filled vessel.
Considering that the height of a transformer might amount 5m and above the mechanical
support structure with the expansion vessel could be placed on a stack with two other
mechanical supporting structures so that it is in a suitable height. Preferably the
supporting structures below could have cooling means integrated therein, but in case
that there is only need for one mechanical supporting structure with cooling means
the other mechanical supporting structure could be even empty with the only purpose
to lift the stack up.
[0023] Thus according to another embodiment of the invention at least two respective mechanical
supporting structures are stacked each on each other. According to a further embodiment
of the invention the mechanical supporting structure with the expansion vessel is
stacked over a respective mechanical supporting structure with cooling means.
[0024] According to another embodiment of the invention at least one supporting structure
is arranged side by side to the oil filled vessel, This reduces the length of the
fluidic connections to the oil filled vessel and in case of the use of radiators as
cooling means the cooling efficiency is increased therewith.
[0025] Further advantageous embodiments of the invention are mentioned in the dependent
claims.
[0026] The invention will now be further explained by means of an exemplary embodiment and
with reference to the accompanying drawings, in which:
- Figure 1
- shows an exemplary mechanical support structure,
- Figure 2
- shows a stack of two mechanical support structures and
- Figure 3
- shows an exemplary oil transformer.
[0027] Figure 1 shows an exemplary mechanical support structure 10, which is carried out
as a truss structure, for example by use of beams respectively hollow beams. The mechanical
support structure has the outer shape of a cuboid which is defined by four upper 12
and four lower 14 corner points. The mechanical support structure comprises a base
frame 16 which is designed in that way that an integrated component such as an oil
filled expansion vessel can be worn. Traverses 18 increase the mechanical stability.
[0028] Figure 2 shows a stack of two mechanical support structures in a sketch 20. A first
22 and a second 24 truss like mechanical support structure are stacked each on each
other. The support structures 22, 24 comprise each four upper 26 and four lower 28
corner points.
[0029] Figure 3 shows an exemplary oil transformer 30. A transformer with a transformer
core 32 and transformer coils 34 is arranged in a vessel 36 which is filled with oil
38. An HV bushing 40 is foreseen at the top of the vessel 36. A stack of mechanical
support structures 46, 48, 50 is foreseen left of the vessel 36. An expansion vessel
42, which is partly filled with oil 44, is integrated in the first mechanical support
structure 46. A fluidic connection in between the expansion vessel 42 and the vessel
36 is realized by a first part 52 leading from the expansion vessel 42 to coupling
means 54 and by a second part 56 leading from the coupling means 54 to the vessel
36.
[0030] The second mechanical support structure 48 has cooling means 58 integrated therein,
in this case a heat exchanger. The heat exchanger comprises several disk like cooling
modules which are arranged side by side along the axial length of the mechanical support
structure 48. Each cooling module is supplied by a main feed line 64 with oil to be
cooled and which is returned after cooling over a main return line 66. Each cooling
module has an own feed 60 and return 62 line which are connected to the respective
main line 64 respectively 66.
[0031] The third mechanical support structure 50 comprises a fan 68 and control equipment
70, in particular a computer for logging and analyzing measured data of the oil transformer
30. Additionally the stack of the first 46 and second 48 mechanical support structures
is lifted up therewith, so that the expansion vessel 42 of the first mechanical support
structure is above the top of the vessel 36 therewith. The whole arrangement is placed
on a ground floor 72.
List of reference signs
[0032]
- 10
- exemplary mechanical support structure
- 12
- upper corner points
- 14
- lower corner points
- 16
- base frame
- 18
- traverse
- 20
- stack of two mechanical support structures
- 22
- upper mechanical support structure
- 24
- lower mechanical support structure
- 26
- upper corner points of upper mechanical support structure
- 28
- lower corner points of lower mechanical support structure
- 30
- exemplary oil transformer
- 32
- transformer core
- 34
- transformer coil
- 36
- vessel
- 38
- oil
- 40
- HV-bushing
- 42
- expansion vessel
- 44
- oil
- 46
- first mechanical support structure
- 48
- second mechanical support structure
- 50
- third mechanical support structure
- 52
- first part of fluidic connection
- 54
- coupling means
- 56
- second part of fluidic connection
- 58
- cooling means
- 60
- feed line of cooling module
- 62
- return line of cooling module
- 64
- main feed line
- 66
- main return line
- 68
- fan
- 70
- control equipment
- 72
- ground floor
1. Oil transformer (30), comprising
• a high voltage transformer (32 + 34) arranged in an oil filled vessel (36),
• an expansion vessel (42),
• a fluidic connection (52 + 54 + 56) in between the expansion vessel (42) and the
oil filled vessel (36),
• at least one cooling means (58),
wherein the oil transformer (30) further comprises:
• a first module comprising the expansion vessel (42) and a mechanical supporting
structure (10, 22, 24, 46) which comprises at least one hollow bar, the expansion
vessel (42) being fixedly integrated in the mechanical supporting structure (10, 22,
24, 46) comprising said hollow bar, which has four upper (12, 26) and four lower (14,
28) corner points arranged in the form of a square, wherein the corner points (12,
14, 26, 28) each are in the form of load transfer points,
characterized in that,
• the corner points (12, 14, 26, 28) are arranged according to the dimensions of a
CSC, i.e. Container Safety Convention, container, so that the first module can be
transported exactly like a CSC container,
• wherein the mechanical supporting structure has outer dimensions like said CSC container,
• wherein said hollow bar is a load bearing hollow bar, which is as well load bearing
as foreseen as a part of the fluidic connection (52 + 54 + 56) in between the expansion
vessel (42) and the oil filled vessel (36),
• wherein the functionality of a pipe is integrated into said hollow bar, and
• wherein the mechanical supporting structure (10, 22, 24, 46) comprises coupling
means (54) at its outer surface which are foreseen as a part of the fluidic connection
(52 + 54 + 56) in between the expansion vessel (42) and the oil filled vessel (36).
2. Oil transformer according to claim 1, wherein the oil transformer (30) further comprises
a second module comprising the at least one cooling means (58) and a second mechanical
supporting structure, the at least one cooling means (58) being fixedly integrated
in the second mechanical supporting structure (10, 22, 24, 48) which has four upper
(12, 26) and four lower (14, 28) corner points arranged in the form of a square, wherein
the corner points (12, 14, 26, 28) each are in the form of load transfer points and
are arranged according to the dimensions of a CSC container, so that the second module
can be transported exactly like a CSC container.
3. Oil transformer according to claim 2, wherein the at least one cooling means (58)
is a heat exchanger, in particular an oil air heat exchanger or an oil water heat
exchanger.
4. Oil transformer according to claim 3, wherein the mechanical supporting structure
(10, 22, 24, 48) comprises coupling means at its outer face which are foreseen as
a part of a fluidic connection in between the heat exchanger (58) and the oil filled
vessel (36).
5. Oil transformer according to claim 2, wherein the at least one cooling means (58)
is one or more radiators.
6. Oil transformer according to claim 5, wherein the radiators are divided into two groups,
which are foreseen to be operated independently each from each other.
7. Oil transformer according to any of the previous claims, wherein the oil transformer
(30) further comprises a third module comprising control equipment and a third mechanical
supporting structure, the control equipment being fixedly integrated in the third
mechanical supporting structure (10, 22, 24, 50) which has four upper (12, 26) and
four lower (14, 28) corner points arranged in the form of a square, wherein the corner
points (12, 14, 26, 28) each are in the form of load transfer points and are arranged
according to the dimensions of a CSC container, so that the third module can be transported
exactly like a CSC container.
8. Oil transformer according to any of previous claims 2-6, wherein at least two respective
mechanical supporting structures (10, 22, 24, 46, 48, 50) are stacked each on each
other.
9. Oil transformer according to claim 8, wherein a respective mechanical supporting structure
(10, 22, 24, 46) with the expansion vessel (42) is stacked over the second mechanical
supporting structure (10, 22, 24, 46, 48,) with the at least one cooling means (58).
10. Oil transformer according to any of the previous claims, wherein at least one supporting
structure (10, 22, 24, 46, 48, 50) is arranged side by side to the oil filled vessel
(36).
1. Öltransformator (30), der Folgendes umfasst:
• einen Hochspannungstransformator (32 + 34), der in einem ölgefüllten Behälter (36)
angeordnet ist,
• einen Ausdehnungsbehälter (42),
• eine strömungstechnische Verbindung (52 + 54 + 56) zwischen dem Ausdehnungsbehälter
(42) und dem ölgefüllten Behälter (36) und
• mindestens ein Kühlmittel (58), wobei
der Öltransformator (30) ferner Folgendes umfasst:
• ein erstes Modul, das den Ausdehnungsbehälter (42) und eine mechanische Tragstruktur
(10, 22, 24, 46) umfasst, die mindestens eine Hohlstange umfasst, wobei der Ausdehnungsbehälter
(42) in die mechanische Tragstruktur (10, 22, 24, 46), die die Hohlstange umfasst,
fest integriert ist, und die vier obere (12, 26) und vier untere (14, 28) Eckpunkte,
die in Form eines Quadrats angeordnet sind, besitzt, wobei die Eckpunkte (12, 14,
26, 28) jeweils die Form von Lastübertragungspunkten aufweisen, dadurch gekennzeichnet, dass
• die Eckpunkte (12, 14, 26, 28) gemäß den Abmessungen eines CSC-Containers, d. h.
eines Containers gemäß dem Containersicherheitsübereinkommen, derart angeordnet sind,
dass das erste Modul genau wie ein CSC-Container transportiert werden kann, wobei
• die mechanische Tragstruktur Außenabmessungen wie der CSC-Container besitzt,
• die Hohlstange eine tragende Hohlstange ist, die sowohl tragend als auch als Teil
der strömungstechnischen Verbindung (52 + 54 + 56) zwischen dem Ausdehnungsbehälter
(42) und dem ölgefüllten Behälter (36) vorgesehen ist,
• die Funktionalität eines Rohrs in die Hohlstange integriert ist und
• die mechanische Tragstruktur (10, 22, 24, 46) an ihrer Außenseite Kopplungsmittel
(54) umfasst, die als ein Teil der strömungstechnischen Verbindung (52 + 54 + 56)
zwischen dem Ausdehnungsbehälter (42) und dem ölgefüllten Behälter (36) vorgesehen
sind.
2. Öltransformator nach Anspruch 1, wobei der Öltransformator (30) ferner ein zweites
Modul umfasst, das das mindestens eine Kühlmittel (58) und eine zweite mechanische
Tragstruktur umfasst, das mindestens eine Kühlmittel (58) in die zweite mechanische
Tragstruktur (10, 22, 24, 48), die vier obere (12, 26) und vier untere (14, 28) Eckpunkte
besitzt, die in Form eines Quadrats angeordnet sind, fest integriert ist, wobei die
Eckpunkte (12, 14, 26, 28) jeweils die Form von Lastübertragungspunkten aufweisen
und gemäß den Abmessungen eines CSC-Containers angeordnet sind, derart, dass das zweite
Modul genau wie ein CSC-Container transportiert werden kann.
3. Öltransformator nach Anspruch 2, wobei das mindestens eine Kühlmittel (58) ein Wärmetauscher,
insbesondere ein Öl/Luft-Wärmetauscher oder ein Öl/Wasser-Wärmetauscher ist.
4. Öltransformator nach Anspruch 3, wobei die mechanische Tragstruktur (10, 22, 24, 48)
Kopplungsmittel an ihrer Außenseite umfasst, die als ein Teil einer strömungstechnischen
Verbindung zwischen dem Wärmetauscher (58) und dem ölgefüllten Behälter (36) vorgesehen
sind.
5. Öltransformator nach Anspruch 2, wobei das mindestens eine Kühlmittel (58) ein oder
mehrere Kühler sind.
6. Öltransformator nach Anspruch 5, wobei die Kühler in zwei Gruppen unterteilt sind,
die dazu vorgesehen sind, unabhängig voneinander betrieben zu werden.
7. Öltransformator nach einem der vorhergehenden Ansprüche, wobei der Öltransformator
(30) ferner ein drittes Modul umfasst, das ein Steuergerät und eine dritte mechanische
Tragstruktur umfasst, wobei das Steuergerät in die dritte mechanische Tragstruktur
(10, 22, 24, 50), die vier obere (12, 26) und vier untere (14, 28) Eckpunkte besitzt,
die in Form eines Quadrats angeordnet sind, fest integriert ist, wobei die Eckpunkte
(12, 14, 26, 28) jeweils die Form von Lastübertragungspunkten aufweisen und gemäß
den Abmessungen eines CSC-Containers derart angeordnet sind, dass das dritte Modul
genau wie ein CSC-Container transportiert werden kann.
8. Öltransformator nach einem der vorhergehenden Ansprüche 2-6, wobei mindestens zwei
mechanische Tragstrukturen (10, 22, 24, 46, 48, 50) aufeinandergestapelt sind.
9. Öltransformator nach Anspruch 8, wobei eine entsprechende mechanische Tragstruktur
(10, 22, 24, 46) mit dem Ausdehnungsbehälter (42) über die zweite mechanische Tragstruktur
(10, 22, 24, 46, 48) mit dem mindestens einen Kühlmittel (58) gestapelt ist.
10. Öltransformator nach einem der vorhergehenden Ansprüche, wobei mindestens eine Tragstruktur
(10, 22, 24, 46, 48, 50) neben dem ölgefüllten Behälter (36) angeordnet ist.
1. Transformateur à huile (30), comprenant:
• un transformateur à haute tension (32 + 34) disposé dans un récipient rempli d'huile
(36),
• un vase d'expansion (42),
• une liaison fluidique (52 + 54 + 56) entre le vase d'expansion (42) et le récipient
rempli d'huile (36),
• au moins un moyen de refroidissement (58),
ce transformateur à huile (30) comprenant en outre :
• un premier module comprenant le vase d'expansion (42) et une structure de support
mécanique (10, 22, 24, 46) qui comprend au moins une barre creuse, le vase d'expansion
(42) étant intégré de manière fixe dans cette structure de support mécanique (10,
22, 24, 46) comprenant ladite barre creuse, qui a quatre points de coin supérieurs
(12, 16) et quatre points de coin inférieurs (14, 28) disposés sous la forme d'un
carré, ces points de coin (12, 14, 26, 28) étant chacun sous la forme de points de
transfert de charge,
caractérisé en ce que
• les points de coin (12, 14, 26, 28) sont disposés en fonction des dimensions d'un
conteneur CSC, c'est-à-dire Convention sur la sécurité des conteneurs, de manière
à ce que le premier module puisse être transporté exactement comme un conteneur CSC,
• la structure de support mécanique ayant des dimensions extérieures comme ledit conteneur
CSC,
• ladite barre creuse étant une barre creuse porteuse de charge, qui est aussi porteuse
de charge comme prévu comme faisant partie de la liaison fluidique (52 + 54 + 56)
entre le vase d'expansion (42) et le récipient rempli d'huile (36),
• la fonctionnalité d'un tuyau étant intégrée dans ladite barre creuse, et
• la structure de support mécanique (10, 22, 24, 46) comprenant des moyens de liaison
(54) au niveau de sa surface extérieure qui sont prévus comme faisant partie de la
liaison fluidique (52 + 54 + 56) entre le vase d'expansion (42) et le récipient rempli
d'huile (36).
2. Transformateur à huile selon la revendication 1, ce transformateur à huile (30) comprenant
en outre un deuxième module comprenant l'au moins un moyen de refroidissement (58)
et une deuxième structure de support mécanique, l'au moins un moyen de refroidissement
(58) étant intégré de manière fixe dans la deuxième structure de support mécanique
(10, 22, 24, 48) qui a quatre points de coin supérieurs (12, 26) et quatre points
de coin inférieurs (14, 28) disposés sous la forme d'un carré, ces points de coin
(12, 14, 26, 28) étant chacun sous la forme de points de transfert de charge et étant
disposés en fonction des dimensions d'un conteneur CSC, de manière à ce que le deuxième
module puisse être transporté exactement comme un conteneur CSC.
3. Transformateur à huile selon la revendication 2, dans lequel l'au moins un moyen de
refroidissement (58) est un échangeur de chaleur, en particulier un échangeur du chaleur
huile-air ou un échangeur de chaleur huile-eau.
4. Transformateur à huile selon la revendication 3, dans lequel la structure de support
mécanique (10, 22, 24, 48) comprend des moyens de liaison au niveau de sa surface
extérieure qui sont prévus comme faisant partie d'une liaison fluidique entre l'échangeur
de chaleur (58) et le récipient rempli d'huile (36).
5. Transformateur à huile selon la revendication 2, dans lequel l'au moins un moyen de
refroidissement (58) consiste en un ou plusieurs radiateurs.
6. Transformateur à huile selon la revendication 5, dans lequel les radiateurs sont divisés
en deux groupes, qui sont prévus pour être utilisés indépendamment l'un de l'autre.
7. Transformateur à huile selon l'une quelconque des revendications précédentes, ce transformateur
à huile (30) comprenant en outre un troisième module comprenant un matériel de commande
et une troisième structure de support mécanique, ce matériel de commande étant intégré
de manière fixe dans la troisième structure de support mécanique (10, 22, 24, 50)
qui a quatre points de coin supérieurs (12, 26) et quatre points de coin inférieurs
(14, 28) disposés sous la forme d'un carré, ces points de coin (12, 14, 26, 28) étant
chacun sous la forme de points de transfert de charge et étant disposés en fonction
des dimensions du conteneur CSC, de manière à ce que le troisième module puisse être
transporté exactement comme un conteneur CSC.
8. Transformateur à huile selon l'une quelconque des revendications précédentes 2 à 6,
dans lequel au moins deux structures de support mécanique (10, 22, 24, 46, 48, 50)
sont empilées chacune l'une sur l'autre.
9. Transformateur à huile selon la revendication 8, dans lequel une structure de support
mécanique respective (10, 22, 24, 46) avec le vase d'expansion (42) est empilée au-dessus
de la deuxième structure de support mécanique (10, 22, 24, 46, 48) avec l'au moins
un moyen de refroidissement (58).
10. Transformateur à huile selon l'une quelconque des revendications précédentes, dans
lequel au moins une structure de support mécanique (10, 22, 24, 46, 48, 50) est disposée
côte à côte avec le récipient rempli d'huile (36).
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only.
It does not form part of the European patent document. Even though great care has
been taken in compiling the references, errors or omissions cannot be excluded and
the EPO disclaims all liability in this regard.
Patent documents cited in the description
Non-patent literature cited in the description
- BERNT BJERKREIM et al.Ormen Lange Subsea Compression PilotOFFSHORE TECHNOLOGY CONFERENCEM, 2007, 1-11 [0002]