EP1905053A1 - Appareil electrique ferme de maniere etanche - Google Patents

Appareil electrique ferme de maniere etanche

Info

Publication number
EP1905053A1
EP1905053A1 EP06792507A EP06792507A EP1905053A1 EP 1905053 A1 EP1905053 A1 EP 1905053A1 EP 06792507 A EP06792507 A EP 06792507A EP 06792507 A EP06792507 A EP 06792507A EP 1905053 A1 EP1905053 A1 EP 1905053A1
Authority
EP
European Patent Office
Prior art keywords
transformer
insulating liquid
gas
vessel
pressure
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Withdrawn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
EP06792507A
Other languages
German (de)
English (en)
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
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1905053A1 publication Critical patent/EP1905053A1/fr
Withdrawn legal-status Critical Current

Links

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 ge with an insulating liquid filled ⁇ hermetically sealed electrical apparatus, preferably a transformer and means for receiving the thermally induced fluctuations in volume of the insulating liquid contained in this.
  • the invention provides a hermetic sealing of the transformer and thus a significant reduction in the Old ⁇ tion of the insulating liquid and set cellulosic ⁇ built insulating the apparatus.
  • the use of the arrangement according to the invention also makes it possible to dispense with dehumidifiers and associated pipelines.
  • transformers and other electrical equipment are filled with oil or other insulating fluids for cooling and insulation.
  • oil expansion vessel which is connected via a pipe provided with a slope with the vessel of the transformer.
  • Such expansion vessels are described for example in DE19527763C2. Disadvantage of these expansion vessels is the contact of the oil surface with the outside air, which requires the use of so-called dehumidifiers. In these dehumidifiers, the air is passed over a desiccant and thereby dehumidified.
  • the adsorption capacity the desiccant (hygroscopicity) is hereby takes up ⁇ and the desiccant must be replaced regularly.
  • these dehumidifiers do not offer a reliable seal against the absorption of moisture and oxygen by the insulating liquid, in particular in the event of rapid cooling of the transformer.
  • the deformation of the radiator causes a change of the cross-section for the oil and air circulation.
  • the strain radiators required for this solution cause high costs, can not be hot-dip galvanized and are currently not freely available on the market. These strain radiators can still not be made with stepped links, but this is necessary for larger power transformers whose cooling system should be within the loading gauge for rail transport.
  • expansion vessels which use a membrane in the main chamber for separating the insulating liquid from the ambient air. Such is described in DE3206368. Although these expansion vessels provide Siche ⁇ ren completion of the insulating liquid from the ambient air, but still need a dehumidifier which is associated with the aforementioned drawbacks. Furthermore, the contact with the ambient air leads to aging of the membrane and thus causes technical uncertainties.
  • the invention described hereinafter permits a com- pensation of the change in the oil volume during operation of the Trans ⁇ formators, while avoiding the disadvantages mentioned above.
  • the present invention uses a gas cushion to absorb the thermally induced volume fluctuations of the insulating liquid.
  • An inert gas preferably nitrogen, is used for this gas cushion.
  • This gas cushion is erfindungsge ⁇ Telss separated by a membrane from the insulating liquid.
  • An inventively arranged membrane is not the A ⁇ influences the atmosphere (oxygen, ozone, water vapor) sets out ⁇ and achieves a high durability.
  • the separation between the insulating liquid and the gas cushion serving membrane is not designed according to the invention for the size of the gas cushion, but only for recording the volume fluctuations of the insulating liquid.
  • the gas volume required to limit the maximum pressure lumen is provided in additional containers.
  • Operation is in all operating states with unsaturated oil. A mixture of gases formed by decomposition of oil with the gas of the gas cushion is avoided.
  • the separation of the containers offers the possibility to keep the maximum gas temperature well below the maximum operating temperature of the transformer by advantageous arrangement of the gas compression chambers. This offers the possi ⁇ ability of reducing the required volume or the maximum working pressure.
  • the arrangement of the gas compression chambers is flexible.
  • the form part containing the membrane can be arranged easily accessible in the lower part of the transformer. This allows a reduction in the height of the transformer and the design of transportable fully equipped high-performance transformers.
  • the transformer according to the invention Due to the design of the transformer according to the invention, a complete closure of the insulating liquid from the atmosphere / ambient air can be achieved. The absorption of moisture and oxygen by the insulating liquid is prevented. An influence on the electrical breakdown The strength of the insulating liquid due to moisture is avoided, and the aging of the insulating liquid and the cellulose of the insulating parts significantly reduced.
  • the dehumidifier, as well as the associated piping can be omitted.
  • the regular check of the condition of the desiccant in the dehumidifier can be saved and there are cost savings due to the elimination of the costly regular replacement of the desiccant.
  • Environmental pollution and disposal problems by ver ⁇ needed desiccant are avoided.
  • the described solution ensures further the full radio ⁇ tion capacity of the Buchholz relay.
  • the described in the invention transformer can be easily configured so that all necessary for the function of the hermetic termination assemblies are arranged outside the actual body of the transformer and the same outer An ⁇ conclusions, such as a transformer of conventional design use zen. This provides a simple way of retrofitting existing transformers.
  • the transformer in the design of the transformer according to the invention in the event of defects of the hermetically sealed volume compensation device, the transformer does not fail, but it can continue to operate as a conventional transformer.
  • the additional container for the gas cushion are placed separately from the transformer, thereby adapting the system to existing areas is possible.
  • a location with small temperature fluctuations is used for the preparation of the container for the gas cushion.
  • the gas containers are protected with a sunshade or a sun visor against excessive heating.
  • the gas compression chamber (12) is equipped with an additional pressure relief valve, which responds with a much smaller pressure than the large, relatively inertia processing ⁇ tendency that electrical apparatus be protected before resulting in case of damage by decomposition of insulating liquid pressure waves pressure relief valve ,
  • an additional pressure relief valve which responds with a much smaller pressure than the large, relatively inertia processing ⁇ tendency that electrical apparatus be protected before resulting in case of damage by decomposition of insulating liquid pressure waves pressure relief valve ,
  • He ⁇ follows the overload at maximum ambient temperature, so does not come to the response of the pressure relief valve or hermetic protection with the associated shutdown of the Transforma ⁇ tor, as well as the associated with the response of these monitors oil loss as in other Hermetiktransform- ren, but it is done by the responsive at a lower pressure gas discharge valve only a small Gasver ⁇ loss.
  • the transformer can continue to operate normally. It is only necessary until the opposite extreme case of operation (idling or shutdown with minimal change). arguesstemperatur) zen the lost amount of gas to replac ⁇ . If this is not done, there is only an increased risk to the sealing system, a deformation of the boiler and other components is excluded because these transformers are designed to allow the usual filling processes vacuum-resistant.
  • Fig. 1 shows a transformer (2) with a hermetically sealed housing (4) which is filled with an insulating liquid (5.1). Via a pipe (15) which is equipped with a Buchholz relay (Bl) takes place due to the thermally induced volume fluctuations of the insulating liquid, the flow thereof in an expansion vessel (11). In this a membrane (14) is housed, which the iso ⁇ lier gallkeit (5.2) separated from the gas (6.1).
  • the expansion vessel (11) is equipped via a pipe (16) with further chambers for the gas cushion (12), which are arranged such that a thermal decoupling of the gas cushion (6.2) from the temperature of the insulating liquid in the transformer.
  • both the expansion vessel (11) and the gas-compression chamber (12) thermally decoupled from the transformer are formed by sheet-metal cylinders.
  • the execution of the gas compression container as an external cylinder allows the creation of the required compression volume at a very low cost.
  • FIG 2 shows an embodiment of the invention in which the expansion vessel for the insulating liquid (11) under ⁇ half the upper edge of the housing (4.2) of a transformer is arranged and is connected by means of a connecting line (15) ⁇ the art with the vessel (4) that the full function ⁇ ability of the Buchholz relay is guaranteed.
  • the Buchholz relay B1
  • the inventive arrangement of the gas compression chamber (12) allows through the flow of the insulating liquid through a connecting line corresponding to large cross-section (15), unlike other solutions, the use of the Buchholz relay (Bl) integrated surge protection.
  • the yaw-calibrate at ener ⁇ discharges through gas evolution resulting pressure waves lead to a strong Isolierroughkeitsströ- mung in the direction of the expansion vessel (11) and lead to Actuate the ⁇ a supply arranged in the liquid flow sensor flap of the Buchholz relay (BL).
  • the overall height of the Transfor ⁇ mators can be significantly reduced. Furthermore, the design of transportable in the fully upgraded state transformers high performance is much easier.
  • a sun visor (29) prevents overheating of the gas compression chamber.
  • the gas compression chamber (12) is equipped with an additional pressure valve (D3), which responds at a significantly lower pressure than the large-area, relatively inertia-free working, the electrical apparatus before ent damage in case of damage by decomposition of insulating ent ⁇ standing pressure waves pressure relief valve ( Dl).
  • D3 additional pressure valve
  • the transformer is driven at normal ambient temperature with overload as the temperature for the maximum ambient Tempe ⁇ designed gas compression chamber (12) of the insulating men stoodneh- capable of the additional volume increase.

Abstract

L'invention concerne un appareil électrique fermé de manière étanche et rempli d'un diélectrique liquide, de préférence un transformateur, et des dispositifs pour enregistrer les variations volumiques d'origine thermique du diélectrique liquide contenu dans ledit appareil. Selon l'invention, la compensation des variations volumiques est effectuée à l'aide d'un coussin de gaz qui est découplé thermiquement du diélectrique liquide. Le coussin de gaz est en grande partie logé dans un contenant qui est séparé du vase d'expansion du diélectrique liquide. L'ensemble des composants du dispositif de compensation sont configurés de manière que le fonctionnement des appareils de surveillance usuels, en particulier également la protection anti-onde du relais Buchholz, soit maintenu. Cette invention permet de fermer le transformateur de manière étanche et ainsi de retarder significativement le vieillissement du diélectrique liquide et du matériau isolant à base de cellulose dont est constitué l'appareil. Le dispositif selon l'invention permet en outre de supprimer l'utilisation de déshumidificateurs d'air, et de conduites correspondantes.
EP06792507A 2005-07-17 2006-07-14 Appareil electrique ferme de maniere etanche Withdrawn EP1905053A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005034851 2005-07-17
PCT/EP2006/064293 WO2007009961A1 (fr) 2005-07-17 2006-07-14 Appareil electrique ferme de maniere etanche

Publications (1)

Publication Number Publication Date
EP1905053A1 true EP1905053A1 (fr) 2008-04-02

Family

ID=37114483

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06792507A Withdrawn EP1905053A1 (fr) 2005-07-17 2006-07-14 Appareil electrique ferme de maniere etanche

Country Status (4)

Country Link
US (1) US7902951B2 (fr)
EP (1) EP1905053A1 (fr)
CN (1) CN101223613A (fr)
WO (1) WO2007009961A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110793196A (zh) * 2019-10-30 2020-02-14 广西电网有限责任公司电力科学研究院 电流互感器加热装置

Families Citing this family (15)

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UA99843C2 (ru) * 2008-01-01 2012-10-10 СиТиэР МАНУФАКТУРИНГ ИНДАСТРИС ЛИМИТЕД Система и способ защиты регулятора напряжения под нагрузкой и/или трансформатора от взрыва и огня
JP5329008B1 (ja) * 2012-11-20 2013-10-30 三菱電機株式会社 油入電気機器の診断方法およびメンテナンス方法
DE102013100263A1 (de) 2013-01-11 2014-07-31 Maschinenfabrik Reinhausen Gmbh Laststufenschalter mit einer Verbindung zum Ölvolumen eines Transformators
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
US9453686B2 (en) * 2013-08-20 2016-09-27 Shun-Fu International Electrical Co., Ltd. Self-cooling energy saver
FR3023962B1 (fr) * 2014-07-17 2017-11-24 Soc Nat Des Chemins De Fer Francais Sncf Transformateur electrique immerge sous vide
EP3109871B1 (fr) * 2015-06-25 2020-08-19 ABB Power Grids Switzerland AG Agencement de transformateur pour contrôler la pression dans un transformateur rempli de liquide
EP3121826B1 (fr) * 2015-07-22 2020-08-26 Siemens Aktiengesellschaft Dispositif de rêception destinê à recevoir un liquide isolant
EP3121825B1 (fr) * 2015-07-22 2020-09-16 Siemens Aktiengesellschaft Dispositif de rêception destinê à recevoir un liquide isolant
DE102016220837A1 (de) * 2016-10-24 2018-04-26 Siemens Aktiengesellschaft Transformator mit unten liegendem Ausdehnungsgefäß
DE102017101242A1 (de) * 2017-01-24 2018-07-26 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kühlkreislauf für Batterie mit Buchholzrelais
EP3367399B1 (fr) * 2017-02-28 2020-07-08 General Electric Technology GmbH Ensemble à haute tension
EP3404678B1 (fr) * 2017-05-17 2021-06-30 General Electric Technology GmbH Ensemble à haute tension et procédé de fonctionnement de l'ensemble à haute tension
CN115064352B (zh) * 2022-08-02 2023-07-18 中磁电科有限公司 一种电变压器

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DE1090309B (de) * 1959-07-23 1960-10-06 Transformatorenwerk August Lep Betriebsueberwachung von Transformatoren bei Ausdehnungsgefaessen mit Luftabschluss
US3335380A (en) * 1965-07-16 1967-08-08 Mc Graw Edison Co Ground level transformer with cabinet
JPS61128506A (ja) * 1984-11-28 1986-06-16 Mitsubishi Electric Corp 油入電気機器
DE69021966T2 (de) * 1989-07-10 1996-04-18 Hitachi Ltd In Isolierflüssigkeit getauchte elektrische Maschine.
DE4136639C2 (de) * 1991-11-07 1995-12-14 Borsi Hossein Priv Doz Dr Ing Vorrichtung zur elektrischen Ermittlung nicht gelöster Gase in mit Flüssigkeit gefüllten Hochspannungsanlagen und Geräten als Grundlage zur Fehlererkennung und Überwachung dieser Anlagen und Geräte
ATE171314T1 (de) * 1996-01-05 1998-10-15 Juergen Bastian Überwachung der spaltgasbildung in transformatoren
DE19636456C2 (de) * 1996-09-07 1999-11-11 Jeannette Bastian Vorrichtung zur Fremdgasfernhaltung von Systemen mit temperaturbedingt veränderlichem Volumen, insbesondere elektrischen Transformatoren, verbunden mit einer integrierten Vorrichtung zur isolierflüssigkeitstemperaturabhängigen Druckbeeinflussung
US5976226A (en) * 1997-12-18 1999-11-02 Bastian; Juergen Means to ensure a minimum of gas content in liquids used for heat exchange and insulating purposes with complementary means for liquid expansion into vessels with variable volumes
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110793196A (zh) * 2019-10-30 2020-02-14 广西电网有限责任公司电力科学研究院 电流互感器加热装置

Also Published As

Publication number Publication date
US20080197955A1 (en) 2008-08-21
US7902951B2 (en) 2011-03-08
CN101223613A (zh) 2008-07-16
WO2007009961A1 (fr) 2007-01-25

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