EP1905052B1 - Vase d'expansion concu pour un commutateur a gradins - Google Patents

Vase d'expansion concu pour un commutateur a gradins Download PDF

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Publication number
EP1905052B1
EP1905052B1 EP06777798.7A EP06777798A EP1905052B1 EP 1905052 B1 EP1905052 B1 EP 1905052B1 EP 06777798 A EP06777798 A EP 06777798A EP 1905052 B1 EP1905052 B1 EP 1905052B1
Authority
EP
European Patent Office
Prior art keywords
tap changer
changer according
folding bellows
abovementioned
expansion vessel
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.)
Not-in-force
Application number
EP06777798.7A
Other languages
German (de)
English (en)
Other versions
EP1905052A1 (fr
Inventor
Jörg FINDEISEN
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
Original Assignee
Siemens 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
Priority claimed from DE200510033925 external-priority patent/DE102005033925A1/de
Application filed by Siemens AG filed Critical Siemens AG
Priority to PL06777798T priority Critical patent/PL1905052T3/pl
Publication of EP1905052A1 publication Critical patent/EP1905052A1/fr
Application granted granted Critical
Publication of EP1905052B1 publication Critical patent/EP1905052B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H01H9/0044—Casings; Mountings; Disposition in transformer housing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • H01F2027/404—Protective devices specially adapted for fluid filled transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H01F29/025—Constructional details of transformers or reactors with tapping on coil or windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/55—Oil reservoirs or tanks; Lowering means therefor
    • H01H33/555—Protective arrangements responsive to abnormal fluid pressure, liquid level or liquid displacement, e.g. Buchholz relays

Definitions

  • the invention relates to a filled with an insulating liquid tap changer and means for receiving the thermally induced volume fluctuations of this insulating liquid.
  • the invention enables a hermetic closure of the switch vessel and thus a significant reduction in the aging of the switch oil.
  • the use of the arrangement according to the invention also makes it possible to dispense with dehumidifier, external expansion vessel and associated piping. Furthermore, the invention solves the problem of gas accumulation in the pipeline to the expansion vessel of hermetically sealed switches.
  • Tap changers of the type mentioned above are mainly used in power transformers for regulating the voltage under load. In operation, it comes through heating of the switching resistors, heat dissipation by the surrounding the switch and its vessel insulating and cooling medium of the transformer and other influences to significant temperature fluctuations. These cause significant changes in the volume of the insulating liquid of the tap changer. Furthermore, switching arcs and / or heating of the switching resistors cause the thermal decomposition of insulating liquid and resulting gas evolution. These gases rise due to their lower density and must be removed by appropriate measures.
  • the state of the art is the use of expansion vessels mounted above the transformer, which are connected to the switch via an inclined pipeline. Through this pipeline, both the flow of the insulating liquid at thermally induced volume changes, as well as the removal of the gases.
  • WO98 / 54498 is a cover for pressure relief valves known and in DE 10312177 the integration of a cover into a pressure relief valve is described. Both solutions are associated with considerable handling problems and require a large amount of space.
  • the invention described below enables a compensation of the change in the volume of the insulating liquid during operation of the switch, while avoiding the above-mentioned disadvantages.
  • the present invention uses a bellows / compensator to absorb the thermally induced volume fluctuations of the insulating liquid of the switch.
  • Such arrangements are already off GB425169 and JP03192707 known.
  • This balancing device forms a compact assembly without additional piping and is mounted directly on the switch.
  • the shape of the expansion vessel is largely adapted to the contour of the tap changer head, so that the space requirement is kept small.
  • the expansion tank thus forms a unit with the switch and remains attached during transport. The cumbersome installation of expansion vessel and pipes in the installation of the transformer omitted.
  • this pot is formed so that a cavity is created, which can be used to accommodate or accommodate the necessary protection and monitoring technology.
  • this pot is designed such that it serves as a cover and protective cover for the protection, monitoring and control devices.
  • the design of the pot is provided as a cover and splash guard for a pressure relief valve. The pot takes over the collection and the discharge of the hot oil surge in case of failure.
  • the compensation body becomes part of the switch. Additional external assemblies are eliminated and simplify the entire transformer. Problems with gas accumulation in pipelines and obstruction of the oil flow with temperature changes of the insulating liquid are excluded by the elimination of the problems associated with these assemblies. Due to the inventive design of the volume compensation device can be a complete completion of the insulating liquid of the switch from the atmosphere / ambient air reach. The absorption of moisture and oxygen by the insulating liquid is prevented. An influence of the electr. Damping strength of the insulating liquid by moisture is avoided and the aging of the insulating significantly reduced. The outer expansion tank, the dehumidifier and the associated piping can be omitted. Regular checking of the condition The drying agent in the dehumidifier can be saved and it comes to cost savings by eliminating the costly regular replacement of the drying agent. Pollution and disposal problems caused by spent desiccants are avoided.
  • the switch is equipped with a gas release valve (V3).
  • V3 gas release valve
  • This may conveniently be carried out or controlled so that it responds to a small gas pressure, but not in case of insulating liquid.
  • This is advantageously realized by the control of the gas outlet valve by means of a float (SW).
  • SW float
  • D1 large-area pressure relief valve
  • D1 the bellows enclosing the pressure relief valve.
  • this design also allows leakage monitoring.
  • a guide tube By using a guide tube, the bellows of the compensator can be protected against lateral deflection (kinking). This guide tube can also be used to accommodate the occurring during transport of the transformer lateral acceleration forces.
  • the Druckwellenleit adopted for the pressure relief valve is used as a guide tube for the bellows.
  • the Druckwellenleit adopted is designed such that a secure transmission of the pressure waves is ensured both with stretched compensator and with a compressed compensator.
  • Moving basic element of the compensator is the metal bellows, which has an axial mobility due to its annular circumferential waves, which in use used in the expansion vessel according to the invention to compensate for the thermally induced volume changes of the insulating liquid of the tap changer.
  • This bellows draws its flexibility from the flexibility of the radial standing flanks. It is preferable for the described application, the lyre-shaped shaft due to the great flexibility with sufficient compressive strength.
  • the compensating body is provided with a spring element in order to achieve a predetermined pressure play.
  • spring elements can also be formed by the body of the compensator itself.
  • the compensating device is equipped with a volume limitation in one or both directions.
  • a volume limitation in one or both directions.
  • This limitation is also possible by a stroke limitation of the compensation elements and a multi-part compensating device with chambers of different spring constant.
  • FIG. 1 shows a switch (S) with a switch head (SK), which is arranged on the cover of a transformer.
  • the space inside the switch (S) is filled with insulating liquid. Since the housing of the switch (S) hermetically seals this, it comes when heating the insulating liquid of the switch to an increase in the internal pressure in the switch. This pressure increase causes an expansion of the compensator (K). Gases forming by thermal decomposition of oil rise upward and are guided through the cylindrical pipe sections (R1) to a monitoring device (D1). One of the two pipe segments (R1) is arranged on the movable end plate of the compensator. These pieces of pipe are designed so that they ensure a safe derivation of pressure waves to the pressure relief valve (D1) at each position of the compensator.
  • the height is dimensioned such that the compensator exploits its full flexibility and a safe flow of oil between the switch and expansion tank is ensured.
  • the cross-section of the pressure wave channel formed by the pipe section (R1) to the pressure relief valve (D1) is so large that pressure waves are passed unhindered to the pressure relief valve.
  • the oil channel in the expansion vessel is formed in the embodiment by the gap between the two pipe or guide pieces (R1) is designed so that it allows for the slowly running thermally induced volume fluctuations sufficient oil flow, for the explosive volume increases in case of damage but one such damping has that the pressure wave is not transmitted to the bellows but within the pipe socket (R1) to the pressure relief valve (D1) is performed.
  • FIG. 2 shows a tap-changer (S) with expansion vessel, a usual for tap changer protective relay (D2) via the pipe (R2) with the interior of the switch (S) is connected.
  • FIG. 3 shows an inventive embodiment of the switch expansion vessel in which a bellows (K) is installed as a negative compensator in the cylindrical expansion vessel.
  • the axial movement of the bellows leads to the adaptation of the volume.
  • the movable inner cover plate of the expansion vessel and the bellows (K) form a cavity which is used to accommodate the monitoring devices of the switch.
  • the movement of the cover plate (P2) is used on a display device (AV) for indicating the oil volume or the corresponding temperature of the insulating liquid of the tap changer.
  • FIG. 4 shows an inventive embodiment of the switch expansion vessel in which a bellows (K) as a positive compensator the volume fluctuations of the insulating liquid of the tap changer compensates.
  • a bellows (K) as a positive compensator the volume fluctuations of the insulating liquid of the tap changer compensates.
  • a fixed pot-shaped inner cylinder which encloses the monitoring devices of the tap changer.
  • This cup-shaped inner cylinder is advantageously largely adapted to the shape of the bellows (K) in the compressed state.
  • this inner cylinder serves at the same time as oil collection hood and splash guard for a pressure relief valve (D1) enclosed by this cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)

Claims (16)

  1. Commutateur (S) à gradins empli d'un liquide isolant et pourvu d'un boîtier fermé de manière étanche, comprenant un vase d'expansion pour absorber les variations de volume dues à la température du liquide isolant, dans lequel pour absorber les fluctuations de volume du liquide isolant on utilise le déplacement d'un soufflet (K) à plis et le vase d'expansion est monté directement sur la tête du commutateur à gradins,
    caractérisé en ce que
    le soufflet (K) à plis entoure une soupape (D1) de décompression.
  2. Commutateur à gradins suivant la revendication 1,
    caractérisé en ce que
    par un soufflet à plis formant un cylindre intérieur en forme de pot dans la paroi extérieure ou en mettant un soufflet à plis intérieur négatif dans un cylindre extérieur en forme de pot, on égalise le volume d'huile du vase de dilatation à la différence de volume utile du soufflet à plis.
  3. Commutateur à gradins suivant la revendication 2,
    caractérisé en ce que
    le cylindre intérieur ou le soufflet à plis intérieur du vase de dilatation forme un espace vide dans lequel sont logés, en économisant de l'espace, les appareils de contrôle et les appareillages nécessaires au commutateur à gradins.
  4. Commutateur à gradins suivant la revendication 2 ou 3,
    caractérisé en ce que le cylindre intérieur entoure la soupape de décompression.
  5. Commutateur à gradins suivant l'une des revendications précédentes,
    caractérisé en ce que
    le soufflet à plis est pourvu d'un élément à ressort pour produire un jeu de pression défini à l'avance.
  6. Commutateur à gradins suivant l'une des revendications précédentes,
    caractérisé en ce que
    la partie fixe et la partie mobile du vase de dilatation sont pourvues chacune d'un manchon de guidage et en ce que ces manchons de guidage se chevauchent.
  7. Commutateur à gradins suivant l'une des revendications précédentes, caractérisé en ce qu'il est utilisé un soufflet à plis à plusieurs couches.
  8. Commutateur à gradin suivant la revendication 7,
    caractérisé en ce que
    pour le soufflet à plis au moins à deux couches, un contrôle de fuite est raccordé à l'espace vide entre les couches.
  9. Commutateur à gradins suivant l'une des revendications précédentes,
    caractérisé en ce que
    le commutateur à gradins est équipé de dispositifs de détection du niveau de liquide isolant et/ou de détection de la pression.
  10. Commutateur à gradins suivant la revendication 9,
    caractérisé en ce que
    la déformation du soufflet à plis provoquée par la variation de volume est utilisée pour l'évacuation et/ou l'indication du volume d'huile du commutateur.
  11. Commutateur à gradins suivant l'une des revendications précédentes,
    caractérisé en ce que
    le commutateur à gradins est équipé de dispositifs (V3) de recueil et d'évacuation de gaz qui se forme.
  12. Commutateur à gradins suivant la revendication 11,
    caractérisé en ce que
    les dispositifs sont commandés en fonction du niveau d'huile dans le vase de dilatation.
  13. Commutateur à gradins suivant l'une des revendications précédentes,
    caractérisé en ce que
    le déploiement maximum du soufflet à plis est limité au moyen d'arrêts appropriés.
  14. Commutateur à gradins suivant l'une des revendications précédentes,
    caractérisé en ce que
    la force de rappel du soufflet à plis est produite par le poids d'un corps de lestage.
  15. Commutateur à gradins suivant la revendication 12,
    caractérisé en ce que
    les appareils de contrôle et les appareillages nécessaires au commutateur à gradins forment le corps de lestage pour la force de rappel du soufflet à plis.
  16. Commutateur à gradins suivant l'une des revendications précédentes,
    caractérisé en ce que
    le soufflet à plis est recouvert d'une hotte de protection.
EP06777798.7A 2005-07-15 2006-07-14 Vase d'expansion concu pour un commutateur a gradins Not-in-force EP1905052B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06777798T PL1905052T3 (pl) 2005-07-15 2006-07-14 Naczynie rozszerzalnościowe do przełącznika stopniowego

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE200510033925 DE102005033925A1 (de) 2005-07-15 2005-07-15 Ausdehnungsgefäß für Stufenschalter
DE102005034851 2005-07-17
PCT/EP2006/064292 WO2007009960A1 (fr) 2005-07-15 2006-07-14 Vase d'expansion conçu pour un commutateur a gradins

Publications (2)

Publication Number Publication Date
EP1905052A1 EP1905052A1 (fr) 2008-04-02
EP1905052B1 true EP1905052B1 (fr) 2017-03-01

Family

ID=37114482

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06777798.7A Not-in-force EP1905052B1 (fr) 2005-07-15 2006-07-14 Vase d'expansion concu pour un commutateur a gradins

Country Status (6)

Country Link
US (1) US20080196920A1 (fr)
EP (1) EP1905052B1 (fr)
ES (1) ES2626259T3 (fr)
PL (1) PL1905052T3 (fr)
PT (1) PT1905052T (fr)
WO (1) WO2007009960A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013100266A1 (de) 2013-01-11 2014-07-17 Maschinenfabrik Reinhausen Gmbh Laststufenschalter
DE102013100264A1 (de) 2013-01-11 2014-07-17 Maschinenfabrik Reinhausen Gmbh Laststufenschalter mit einer Verbindung zum Ölvolumen eines Transformators
DE102013100263A1 (de) 2013-01-11 2014-07-31 Maschinenfabrik Reinhausen Gmbh Laststufenschalter mit einer Verbindung zum Ölvolumen eines Transformators
EP2955729A1 (fr) * 2014-06-13 2015-12-16 Siemens Aktiengesellschaft Dispositif d'appui d'une pièce active d'un convertisseur de courant
EP3057112B1 (fr) * 2015-02-16 2020-05-20 ABB Power Grids Switzerland AG Transformateur à huile
EP3121825B1 (fr) * 2015-07-22 2020-09-16 Siemens Aktiengesellschaft Dispositif de rêception destinê à recevoir un liquide isolant
CN108630398A (zh) * 2017-03-15 2018-10-09 沈阳海为电力装备股份有限公司 一种波纹补偿散热器
CN108630397A (zh) * 2017-03-15 2018-10-09 沈阳海为电力装备股份有限公司 一种带分流阀的变压器地下储油冷却补偿装置
CN110440083B (zh) * 2019-09-16 2024-05-24 上海克硫环保科技股份有限公司 一种膨胀节结构及换热装置
EP4095874B1 (fr) 2021-05-24 2024-07-31 Hitachi Energy Ltd Ensemble de changeur de prises et ensemble de cuve de transformateur

Citations (1)

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Publication number Priority date Publication date Assignee Title
WO2004083700A1 (fr) * 2003-03-19 2004-09-30 Maschinenfabrik Reinhausen Gmbh Soupape de decharge

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GB425169A (en) * 1933-09-08 1935-03-08 John Lindley Thompson Improvements in or relating to expansion chambers for hermetically sealed tanks or casings, applicable to the cooling tanks of electrical apparatus
DE748174C (de) * 1940-03-01 1944-10-27 Gehaeuse fuer Transformatoren, Kondensatoren oder aehnlcihe elektrische Geraete
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Also Published As

Publication number Publication date
PL1905052T3 (pl) 2017-08-31
WO2007009960A1 (fr) 2007-01-25
PT1905052T (pt) 2017-05-03
ES2626259T3 (es) 2017-07-24
EP1905052A1 (fr) 2008-04-02
US20080196920A1 (en) 2008-08-21

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