EP3057112B1 - Öltransformator - Google Patents

Öltransformator Download PDF

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Publication number
EP3057112B1
EP3057112B1 EP15155155.3A EP15155155A EP3057112B1 EP 3057112 B1 EP3057112 B1 EP 3057112B1 EP 15155155 A EP15155155 A EP 15155155A EP 3057112 B1 EP3057112 B1 EP 3057112B1
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EP
European Patent Office
Prior art keywords
oil
supporting structure
mechanical supporting
vessel
oil transformer
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.)
Active
Application number
EP15155155.3A
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English (en)
French (fr)
Other versions
EP3057112A1 (de
Inventor
Thomas Schmidt
Ulrich DÜLLBERG
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.)
Hitachi Energy Ltd
Original Assignee
ABB Power Grids Switzerland 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 Power Grids Switzerland AG filed Critical ABB Power Grids Switzerland AG
Priority to EP15155155.3A priority Critical patent/EP3057112B1/de
Publication of EP3057112A1 publication Critical patent/EP3057112A1/de
Application granted granted Critical
Publication of EP3057112B1 publication Critical patent/EP3057112B1/de
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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
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
    • 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

Definitions

  • the invention is related to an oil transformer according to the preamble of claim 1.
  • a transformer of this kind is known from EP 2 169 690 A1 .
  • GB 945,688 A shows an expansion vessel placed in a metal casing.
  • US 2014/240 901 A1 shows a CSC container comprising a transformer and heat exchangers above the transformer but within this container.
  • 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.
  • 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.
  • 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.
  • 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.
  • a rated power of several 100MVA a weight of several 100t
  • a height of for example 6m and above a height of for example 6m and above
  • a length of 12m and above a challenging task.
  • 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.
  • the attached components are normally individually designed with respect to individual requirements for the respective oil transformer.
  • 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.
  • 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.
  • 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.
  • CSC Container Safety Convention wherein the standards related thereto are described for example in ISO 668.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the at least one cooling means are a heat exchanger, in particular an oil air heat exchanger or an oil water heat exchanger.
  • 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.
  • pumps or other components which are required to operate the heat exchanger are integrated in the respective module.
  • 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.
  • 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.
  • 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.
  • 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.
  • a suitable height for an expansion vessel is above the top of the oil filled vessel.
  • 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.
  • 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.
  • At least two respective mechanical supporting structures are stacked each on each other.
  • the mechanical supporting structure with the expansion vessel is stacked over a respective mechanical supporting structure with cooling means.
  • 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.
  • 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.
  • 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.
  • FIG. 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.
  • 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.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformer Cooling (AREA)

Claims (10)

  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.
EP15155155.3A 2015-02-16 2015-02-16 Öltransformator Active EP3057112B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15155155.3A EP3057112B1 (de) 2015-02-16 2015-02-16 Öltransformator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15155155.3A EP3057112B1 (de) 2015-02-16 2015-02-16 Öltransformator

Publications (2)

Publication Number Publication Date
EP3057112A1 EP3057112A1 (de) 2016-08-17
EP3057112B1 true EP3057112B1 (de) 2020-05-20

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EP15155155.3A Active EP3057112B1 (de) 2015-02-16 2015-02-16 Öltransformator

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK3711074T3 (da) * 2018-01-15 2022-06-07 Siemens Energy Global Gmbh & Co Kg Effekttransformatorenhed, der kan transporteres
CA3131486A1 (en) 2019-03-22 2020-10-01 Efacec Energia - Maquinas E Equipamentos Electricos S.A. Modular system applied to transformers
EP3940727B1 (de) 2020-07-13 2024-09-04 Hitachi Energy Ltd Anordnung für statische elektrische induktion

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB383541A (en) * 1931-04-15 1932-11-17 Gen Electric Improvements in and relating to expansion chambers for fluid filled apparatus
GB845102A (en) * 1955-04-19 1960-08-17 Geoffrey Wells Leaper Improvements in or relating to pressure equalisation devices for closed vessels
FR76234E (fr) * 1959-08-07 1961-09-29 Electricite De France Perfectionnement aux transformateurs électriques dans l'huile
DE1465149B2 (de) * 1964-03-18 1970-11-26 Allmänna Svenska Elektriska AB, Västeras (Schweden) Expansionsgefäß für ölkabel
DE19614775C2 (de) * 1996-04-03 1999-05-20 Aeg Schorch Transformatoren Gm Ausdehnungsgefäß für die Kühl- und Isolierflüssigkeit eines Transformators oder einer Drosselspule
PL1905052T3 (pl) * 2005-07-15 2017-08-31 Siemens Aktiengesellschaft Naczynie rozszerzalnościowe do przełącznika stopniowego
US20090242552A1 (en) * 2008-04-01 2009-10-01 Myers Gerald D Iso container having a load transfer plate
EP2133889A1 (de) * 2008-06-12 2009-12-16 ABB Technology AG Drossel und Prüfanordnung mit Drossel
EP2169690B1 (de) * 2008-09-24 2012-08-29 ABB Technology AG Druckkompensator
EP2590185B1 (de) * 2011-11-02 2014-04-02 ABB Technology AG Hochspannungstransformatormodul

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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