WO2011134050A1 - Appareil et procédé de déshydratation d'huile isolante de transformateur par circulation continue de fluide - Google Patents

Appareil et procédé de déshydratation d'huile isolante de transformateur par circulation continue de fluide Download PDF

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Publication number
WO2011134050A1
WO2011134050A1 PCT/CA2011/000467 CA2011000467W WO2011134050A1 WO 2011134050 A1 WO2011134050 A1 WO 2011134050A1 CA 2011000467 W CA2011000467 W CA 2011000467W WO 2011134050 A1 WO2011134050 A1 WO 2011134050A1
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WO
WIPO (PCT)
Prior art keywords
oil
transformer
fluid
water
expansion chamber
Prior art date
Application number
PCT/CA2011/000467
Other languages
English (en)
Inventor
Ioan A. Sabau
Issouf Fofana
Original Assignee
Insoil Canada Ltd.
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 Insoil Canada Ltd. filed Critical Insoil Canada Ltd.
Publication of WO2011134050A1 publication Critical patent/WO2011134050A1/fr

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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 the field of power transformers.
  • the Invention in one embodiment, is a method and apparatus to reduce decay of mineral insulating oil used in power transformers by removing water from in solution in the oil and absorbed by the paper insulation of windings.
  • the Invention has particular application, but is not thereby limited, in the field of power transformers, where it is useful to use a self-sufficient and environmentally friendly method or apparatus to prolong the service reliability and life expectancy of medium, high and extra high voltage power transformers by removing water from the oil and paper insulation.
  • insulating liquid commonly an oil or hydrocarbon is used in power transformers.
  • United States Patent No. 5,942, 121 which claims a method for filtering and removing products of aging in oil using a mechanical filter, an adsorbent and degassing process, and United States Patent No. 4,806,276, an additive for transformer
  • WSLegal ⁇ 064562 ⁇ 00007 ⁇ 5994900v] oils comprised of a non-ionic fluorosurfactant and a halogenated hydrocarbon.
  • United States Patent No. 6, 193,786 claims a method and device for portable degasification, reducing the concentration of combustible gases in insulating oils, by forming a combustible gas-inert mixture and venting the mixture.
  • a method and apparatus which by continuously flowing a fluid, preferably gaseous nitrogen, across the surface of insulating oil in an electrical transformer both segregates the oil from atmospheric oxygen and picks up and removes water (among other things) from the oil. This reduces dangerous and harmful water buildup in the transformer on a continuous basis.
  • a fluid preferably gaseous nitrogen
  • a conventional freely breathing transformer system was modified to replace the continuously varying air layer in the expansion chamber and the associated dehydrator/filter which scrubs water from air coming into the chamber when the oil's volume declines (prior art) (due to reduced temperature or load variation, for instance); with a gaseous nitrogen source (in the case of the experiment, a bottle of compressed dry nitrogen equipped with a pressure regulator to flow nitrogen into the expansion chamber with an added (regulated) vent to permit the nitrogen introduced to the expansion chamber to exit, thus providing a continuous flow of nitrogen into the chamber in the space above the oil, in order to effectively isolate the insulating oil from atmosphere.
  • a gaseous nitrogen source in the case of the experiment, a bottle of compressed dry nitrogen equipped with a pressure regulator to flow nitrogen into the expansion chamber with an added (regulated) vent to permit the nitrogen introduced to the expansion chamber to exit, thus providing a continuous flow of nitrogen into the chamber in the space above the oil, in order to effectively isolate the insulating oil from atmosphere.
  • Water inside a highly electrified transformer system can cause unexpected short circuits (water being electrically conductive) causing operational failure and equipment damage; in addition to being conductive, water is also corrosive, causing increases in the rate of deterioration of paper and oil insulation and metallic parts, among other things, in the transformer, and increasing needs for maintenance, reducing insulating oil useful life, and reducing transformer service reliability.
  • Figure One (1) schematically illustrates an embodiment of the Invention comprised of transformer 1 , gas compressor 2, nitrogen membrane generator 3, nitrogen 4, oil expansion chamber 5, oil 6, trace gases 7, trace gas analyzer 8, gas relay 9, transformer tank 10, oil pump 1 1 , reactivable adsorption tower 12 and Fuller's Earth 13.
  • FIG. 1 schematically illustrates an embodiment of the Invention as an apparatus comprised of a transformer 1, with gas compressor 2, nitrogen membrane generator 3, nitrogen 4, oil 6, trace gases 7, trace gas analyzer 8, transformer tank 10, oil pump 1 1, reactivable adsorption tower 12 and Fuller's Earth 13.
  • a known embodiment of the Invention is a method comprised of a transformer, gas compressor, nitrogen membrane generator, oil, gases, oil expansion chamber, trace gas analyzer, gas relay, transformer tank, oil pump, reactivable adsorption tower and Fuller's Earth, without expansive chamber or gas relay.
  • a nitrogen source provides a nitrogen blanket 4 above the surface of the oil 6.
  • the dynamic nitrogen blanket 4 prevents atmospheric oxygen from contact with the oil 6 and the absorption of water by the nitrogen in the expansion chamber and removal of the
  • a flow of roughly 99.8% purity nitrogen 4 is supplied by a gas compressor 2 and a membrane nitrogen generator 3, and it is continuously injected at one end of the expansion chamber 5 into its gas space and vented at the other end into the atmosphere.
  • the content of gases dissolved in oil of a power transformer is proportional with the partial pressure of gases above its surface. Therefore, when gases are generated inside a transformer tank 10 due to the decomposition of oil under the impact of an incipient electrical failure (hot spot or partial discharge), the arising gases that dissolve in the oil will partially diffuse into the dynamic nitrogen blanket 4. As a result, while the dynamic nitrogen blanket 4 transforms an existing free breathing transformer into an effectively closed or at least oil isolated one, arresting the access of atmospheric oxygen to the surface of the oil without modifying the original design, it also removes water form the insulating oil, which in turn removes water absorbed in the paper insulations in the main immersion tank.
  • the method utilized in the Invention provides a system whereby the initial purity of the oil is maintained for the entire lifetime of the transformer and the liquid insulation provides a method of removal of water that may damage the solid insulation. This lessens the decay of mineral insulating oil while in
  • the role of an expansion chamber is to minimize the surface of oil in contact with the gas space connected to the outside atmosphere by a back and forth circulation pipe, and to introduce the gas relay 9 between the tank and the conservator to isolate dissolved gases in the one chamber from the other.
  • the application of the new transformer apparatus consisting of a one way dynamic nitrogen blanket system free of both oxygen and moisture renders the expansion chamber redundant although the system can be retro-fitted to older two-chamber design if desirable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Degasification And Air Bubble Elimination (AREA)

Abstract

La présente invention concerne l'amélioration de la qualité des huiles minérales isolantes dans les transformateurs, en fournissant une couche isolante d'azote en circulation sur la surface de l'huile afin d'empêcher l'air ambiant de se combiner avec l'huile ou d'y être absorbé, et en retirant l'eau présente dans l'huile. L'invention s'applique au domaine des transformateurs, où des équipements autonomes et écologiques, ainsi que des procédés associés, s'avèrent utiles pour prolonger la durée de vie et la fiabilité entre chaque intervention de maintenance ou chaque contrôle d'une alimentation extra-haute, haute, et moyenne tension. Un procédé et un appareil permettent, par circulation continue d'un fluide, de préférence de l'azote gazeux, sur l'ensemble de la surface de l'huile isolante dans un transformateur électrique, à la fois de séparer l'huile de l'oxygène atmosphérique et de récupérer et de retirer l'eau (entre autres choses) présente dans l'huile. Ceci diminue de manière continue l'accumulation dangereuse et nuisible d'eau dans le transformateur.
PCT/CA2011/000467 2010-04-26 2011-04-26 Appareil et procédé de déshydratation d'huile isolante de transformateur par circulation continue de fluide WO2011134050A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA 2701454 CA2701454A1 (fr) 2010-04-26 2010-04-26 Appareil et procede pour deshydrater l'huile isolante d'un transformateur par circulation continue d'un fluide
CA2,701,454 2010-04-26

Publications (1)

Publication Number Publication Date
WO2011134050A1 true WO2011134050A1 (fr) 2011-11-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2011/000467 WO2011134050A1 (fr) 2010-04-26 2011-04-26 Appareil et procédé de déshydratation d'huile isolante de transformateur par circulation continue de fluide

Country Status (2)

Country Link
CA (1) CA2701454A1 (fr)
WO (1) WO2011134050A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103500628A (zh) * 2013-06-21 2014-01-08 曾庆赣 油浸式变压器的散热方法及其散热器
CN106057419A (zh) * 2016-06-15 2016-10-26 镇江市中能机械设备有限公司 一种变压器油箱
CN109478458A (zh) * 2016-07-21 2019-03-15 通用电器技术有限公司 高压组件和操作该高压组件的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2143580A1 (fr) * 1994-02-28 1995-08-29 Ioan Sabau Methode et appareil pour eliminer substantiellement l'oxydation dans les huiles isolantes de transformateurs
US20050095177A1 (en) * 2003-10-31 2005-05-05 Golner Thomas M. Gas remover apparatus and method
US7205874B2 (en) * 2001-12-05 2007-04-17 Insoil Canada Ltd. Method and apparatus for decreasing gassing and decay of insulating oil in transformers

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2143580A1 (fr) * 1994-02-28 1995-08-29 Ioan Sabau Methode et appareil pour eliminer substantiellement l'oxydation dans les huiles isolantes de transformateurs
US7205874B2 (en) * 2001-12-05 2007-04-17 Insoil Canada Ltd. Method and apparatus for decreasing gassing and decay of insulating oil in transformers
US20050095177A1 (en) * 2003-10-31 2005-05-05 Golner Thomas M. Gas remover apparatus and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103500628A (zh) * 2013-06-21 2014-01-08 曾庆赣 油浸式变压器的散热方法及其散热器
CN106057419A (zh) * 2016-06-15 2016-10-26 镇江市中能机械设备有限公司 一种变压器油箱
CN109478458A (zh) * 2016-07-21 2019-03-15 通用电器技术有限公司 高压组件和操作该高压组件的方法

Also Published As

Publication number Publication date
CA2701454A1 (fr) 2011-10-26

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