EP0245598A1 - Transformateur refroidi par liquide et comprenant un matelas de gaz absorbant les variations de volume dues aux changements de température - Google Patents

Transformateur refroidi par liquide et comprenant un matelas de gaz absorbant les variations de volume dues aux changements de température Download PDF

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Publication number
EP0245598A1
EP0245598A1 EP87102948A EP87102948A EP0245598A1 EP 0245598 A1 EP0245598 A1 EP 0245598A1 EP 87102948 A EP87102948 A EP 87102948A EP 87102948 A EP87102948 A EP 87102948A EP 0245598 A1 EP0245598 A1 EP 0245598A1
Authority
EP
European Patent Office
Prior art keywords
gas cushion
tube
transformer
boiler
gas
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Withdrawn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
EP87102948A
Other languages
German (de)
English (en)
Inventor
Norbert Platzer
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0245598A1 publication Critical patent/EP0245598A1/fr
Withdrawn legal-status Critical Current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
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling

Definitions

  • the invention relates to a transformer with liquid cooling in a hermetically sealed boiler and with a gas cushion compensating for thermal expansion inside the boiler above the cooling liquid and with at least one gas cushion connected to the first gas cushion via a tube on the outside of a side wall of the boiler (DE-AS 12 72 443).
  • Transformers in particular distribution transformers for connecting the medium-voltage network to the consumer connection cables, are often designed with hermetically sealed boilers to simplify the overall structure. These boilers enclose the active part as well as the coolant through which the heat loss generated is transferred to the outer wall of the boiler. To compensate for volume changes due to thermal expansion of the built-in parts of the transformer and the coolant, a gas cushion is arranged above the latter, which is more or less compressed depending on the operating temperature just reached.
  • Such a transformer with laterally arranged bushings has become known from DE-OS 23 08 955.
  • a disadvantage of this arrangement is the arrangement of the bushings, which is unfavorable for many applications, and the relatively large overall height in relation to the overall width.
  • DE-AS 12 72 443 also discloses a transformer with a protective gas cushion above the liquid level, which in addition to the first protective gas cushion above the liquid level has further protective gas cushions attached to the longitudinal sides of the transformer in the form of breathing bags.
  • This division of the total protective gas volume required enables the transformer cross section to be adapted relatively well to the conditions to be met on a case-by-case basis.
  • a disadvantage of this arrangement is that when these transformers are transported, cooling liquid can get into the additional protective gas cushion even with temporary inclinations and strong accelerations via the connecting lines of the protective gas cushion.
  • the invention is therefore based on the object in a transformer of the type mentioned to make the connections required for pressure equalization between the various gas cushions so that even under extreme transport conditions and not quite vertical operating positions, a transfer of coolant from the boiler into the chambers of others Gas cushioning is reliably prevented.
  • This object is achieved for transformers with a plurality of gas cushions in that the end facing the cooling liquid of each of the pipes connecting the gas cushions to one another is protected against the inflow of cooling liquid by a surge protection by: lies in a secondary chamber of the first gas cushion and that this secondary chamber is formed by a cap on the lid of the boiler and is connected to the gas cushion only by a narrow annular gap formed by the tube and the lid.
  • Advantageous embodiments of the invention consist in that the cap is arranged approximately coaxially to the end of the tube and that the end of the tube protrudes beyond the cover by at least half the height of the cap and that when the further gas cushion is divided into several partial volumes in front of each tube Splash protection is provided.
  • the invention can be applied in a very advantageous manner to mast transformers.
  • Their advantages are in particular that the requirements for the uniformity of the transport movements and the exactness of the installation position are not particularly high and that the use of transformers designed according to the invention is thereby almost unlimited.
  • An active part 1 for a cabin or mast transformer which is shown only in broad outline, stands on a base plate 5 of a boiler, the side walls 3 of which, with cooling pockets, are used for recooling a cooling liquid washing around the active part 1.
  • a 3 On one long side of the boiler is a 3 instead of a side wall All-round closed metallic housing 2 is provided.
  • the metallic housing 2 carries at each of its two ends a mast attachment 4, at the upper ends of which a downwardly open eyelet is arranged for placement on a crossbar.
  • the boiler is closed at the top by a cover 6 which carries high-voltage bushings 9 and undervoltage bushings 10 and a diverter 11.
  • the diverter 11 is actuated from the outside on the de-energized transformer with the boiler closed.
  • the boiler is hermetically sealed to the outside by the base plate 5, the side walls 3, the metallic housing 2 and the cover 6. In order to avoid inadmissibly large pressure fluctuations within the boiler due to thermal expansion of the coolant and the active part 1, the boiler is not completely filled with coolant.
  • a gas cushion 12 is provided between the cover 6 and the surface of the cooling liquid which fluctuates between a maximum permissible boundary layer 7 and a lowest boundary layer 8.
  • This gas cushion 12 is preferably formed by an inert, in particular water vapor and oxygen-free, gas.
  • the lower end of the high-voltage duct 9 passes through this gas cushion 12 and dips into the coolant with its lower end, which has bare metal parts. Likewise, the lower ends of the low-voltage bushings 10 and the diverter 11 are also immersed in the cooling liquid.
  • One of the side walls 3 replacing the metallic housing 2 is designed pressure and vacuum resistant and ent holds another gas cushion 14.
  • the gas cushion 14 and the gas cushion 12 under the cover 6 are under the same pressure.
  • the two gas cushions 12 and 14 are connected to one another by a tube 13.
  • the tube 13 is bent in an L-shape, the short leg lying horizontally, passing through a side wall of the metallic housing 2 and being welded to it in a gastight manner.
  • a longer leg of the L-shaped tube 13 is fastened to the side wall of the boiler by a weld, not shown, and protrudes from below through a hole in the lid 6, an annular gap being formed therewith.
  • the gas cushion 12 is connected to an auxiliary chamber 15, into which the longer leg of the tube 13 opens from below.
  • the secondary chamber 15 is formed by a cap 16, which is attached to the cover 6 in a gas-tight manner approximately coaxially with the longer leg of the tube 13.
  • the tube 13 projects beyond the cover 6 by at least half the height of the cap 16.
  • the metallic housing 2 in the case of transformers for greater outputs is divided into a plurality of adjacent chambers, each of which is in turn connected to the air cushion 12 via a tube 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformer Cooling (AREA)
EP87102948A 1986-03-13 1987-03-02 Transformateur refroidi par liquide et comprenant un matelas de gaz absorbant les variations de volume dues aux changements de température Withdrawn EP0245598A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3608425 1986-03-13
DE3608425 1986-03-13

Publications (1)

Publication Number Publication Date
EP0245598A1 true EP0245598A1 (fr) 1987-11-19

Family

ID=6296277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102948A Withdrawn EP0245598A1 (fr) 1986-03-13 1987-03-02 Transformateur refroidi par liquide et comprenant un matelas de gaz absorbant les variations de volume dues aux changements de température

Country Status (2)

Country Link
EP (1) EP0245598A1 (fr)
PT (1) PT84458B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6709496B2 (en) 2001-11-13 2004-03-23 Messko Albert Hauser Gmbh & Co. Kg Air demoisturizer for oil-insulated transformers, chokes and tap changers
CN109616289A (zh) * 2018-12-26 2019-04-12 北华大学 一种用于变压器的运行状态控制装置
CN109659117A (zh) * 2018-12-21 2019-04-19 江苏源通电气有限公司 一种立体卷铁心油浸式变压器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR550539A (fr) * 1922-04-22 1923-03-12 Const Electr De Boulogne Sur S Perfectionnements aux conservateurs d'huile
US1684059A (en) * 1922-10-04 1928-09-11 Westinghouse Electric & Mfg Co Tank structure
CH274000A (de) * 1949-03-26 1951-03-15 Oerlikon Maschf Luftentfeuchter, insbesondere für Strom- und Spannungswandler.
DE910695C (de) * 1952-03-27 1954-05-06 Koch & Sterzel Ag Mit einer Isolierfluessigkeit gefuellter Transformator mit einem Ausdehnungsgefaess
FR1318827A (fr) * 1962-01-11 1963-02-22 Alsthom Cgee Perfectionnement aux postes de transformation électriques

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR550539A (fr) * 1922-04-22 1923-03-12 Const Electr De Boulogne Sur S Perfectionnements aux conservateurs d'huile
US1684059A (en) * 1922-10-04 1928-09-11 Westinghouse Electric & Mfg Co Tank structure
CH274000A (de) * 1949-03-26 1951-03-15 Oerlikon Maschf Luftentfeuchter, insbesondere für Strom- und Spannungswandler.
DE910695C (de) * 1952-03-27 1954-05-06 Koch & Sterzel Ag Mit einer Isolierfluessigkeit gefuellter Transformator mit einem Ausdehnungsgefaess
FR1318827A (fr) * 1962-01-11 1963-02-22 Alsthom Cgee Perfectionnement aux postes de transformation électriques

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6709496B2 (en) 2001-11-13 2004-03-23 Messko Albert Hauser Gmbh & Co. Kg Air demoisturizer for oil-insulated transformers, chokes and tap changers
CN109659117A (zh) * 2018-12-21 2019-04-19 江苏源通电气有限公司 一种立体卷铁心油浸式变压器
CN109659117B (zh) * 2018-12-21 2021-04-13 江苏源通电气有限公司 一种立体卷铁心油浸式变压器
CN109616289A (zh) * 2018-12-26 2019-04-12 北华大学 一种用于变压器的运行状态控制装置

Also Published As

Publication number Publication date
PT84458A (de) 1987-04-01
PT84458B (pt) 1989-10-04

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Inventor name: PLATZER, NORBERT