DE19946641A1 - Improving electrical and aging characteristics of oil-filled high voltage equipment comprises adding hygroscopic insulant liquid to mineral oil - Google Patents

Improving electrical and aging characteristics of oil-filled high voltage equipment comprises adding hygroscopic insulant liquid to mineral oil

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Publication number
DE19946641A1
DE19946641A1 DE1999146641 DE19946641A DE19946641A1 DE 19946641 A1 DE19946641 A1 DE 19946641A1 DE 1999146641 DE1999146641 DE 1999146641 DE 19946641 A DE19946641 A DE 19946641A DE 19946641 A1 DE19946641 A1 DE 19946641A1
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DE
Germany
Prior art keywords
mineral oil
properties
liquid
hygroscopic
oil
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Withdrawn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
DE1999146641
Other languages
German (de)
Inventor
Hossein Borsi
Ernst Gockenbach
Isouf Fofana
Juergen Bastian
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.)
Individual
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Individual
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 Individual filed Critical Individual
Priority to DE1999146641 priority Critical patent/DE19946641A1/en
Publication of DE19946641A1 publication Critical patent/DE19946641A1/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/20—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Organic Insulating Materials (AREA)

Abstract

A hygroscopic insulant liquid is added to the mineral oil. Preferred Features: A hygroscopic additive replaces some oil in existing equipment. In new high voltage equipment, the solid insulation is first impregnated with an hygroscopic insulant, filling afterwards with mineral oil, improving drying and reducing delamination and gas inclusions.

Description

Stand der TechnikState of the art

Leistungstransformatoren und die Mehrzahl von Verteilungstransformatoren werden mit Transformatorenöl auf Mineralölbasis gefüllt, welches als Isolier- und Wärmeübertragungsmedium dient.Power transformers and the majority of distribution transformers are filled with mineral oil-based transformer oil, which acts as an insulating and heat transfer medium is used.

Problemproblem

Die elektrischen und Alterungseigenschaften von Mineralöl sind sehr stark von der relativen Feuchte abhängig. Hohe relative Feuchte bewirkt einen hohen Wassergehalt im Isolierpapier, wodurch ebenfalls eine beschleunigte Alterung des Isolierpapiers erfolgt.The electrical and aging properties of mineral oil are very strong depending on the relative humidity. High relative humidity causes a high Water content in the insulating paper, which also accelerates aging of the insulating paper.

Dem im Anspruch 1 angegebenen Verfahren liegt das Problem zugrunde, die elektrischen Eigenschaften der Isolierung von Hochspannungsgeräten feuchte-, temperatur- und alterungsunabhängiger zu machen.The method specified in claim 1 is based on the problem that electrical properties of the insulation of high-voltage equipment moisture, to make it more temperature and age independent.

Verbesserungen gegenüber dem Stand der TechnikImprovements over the prior art

Die mit der Erfindung erzielten Verbesserungen gegenüber dem Stand der Technik bestehen insbesondere darin, daß durch die gezielte Beimischung einer bestimmten Menge einer hygroskopischen Isolierflüssigkeit die elektrischen und Alterungseigenschaften der Isolierung von im Betrieb befindlichen Hochspannungsgeräten verbessert werden. Weiterhin können die Eigenschaften der Isolierung an die jeweiligen Betriebsanforderungen angepaßt werden.The improvements achieved with the invention over the prior art Technology consists in particular in that through the targeted admixture of a certain amount of a hygroscopic insulating liquid the electrical and aging properties of insulation in service High voltage devices can be improved. Furthermore, the properties the insulation can be adapted to the respective operating requirements.

Bei den neuen Hochspannungsgeräten kann durch die Imprägnierung mit einer trockenen hygroskopischen Isolierflüssigkeit und Weiterbefüllung mit Mineralöl der festen Isolierung aus Zellulose Feuchte entzogen und damit die Isoliereigenschaften verbessert werden und außerdem die Gefahr der Entstehung von Delaminationen und Gaseinschlüssen reduziert werden.The new high-voltage devices can be impregnated with a dry hygroscopic insulating liquid and further filling with Mineral oil extracted from the solid insulation from cellulose moisture and thus the insulation properties are improved and also the risk of The formation of delaminations and gas inclusions can be reduced.

Claims (5)

1. Verfahren zur Verbesserung der elektrischen und Alterungseigenschaften von mineralölgefüllten Hochspannungsgeräten dadurch gekennzeichnet, daß zu dem Mineralöl eine bestimmte Menge einer hygroskopischen Isolierflüssigkeit, insbesondere Pentaerythrit-Tetraester hinzugegegeben wird.1. A method for improving the electrical and aging properties of mineral oil-filled high-voltage devices, characterized in that a certain amount of a hygroscopic insulating liquid, in particular pentaerythritol tetraester, is added to the mineral oil. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß durch die Menge der beigemischten Isolierflüssigkeit die Eigenschaften der entstandenen Mischisolierflüssigkeit variiert und an die jeweiligen Betriebsanforderungen angepaßt werden.2. The method according to claim 1, characterized in that by the Amount of insulation liquid added has the properties of resulting mixed insulation liquid varies and to the respective Operating requirements are adjusted. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß durch die Beimischung der hygroskopischen Flüssigkeit zum Mineralöl die Eigenschaften der Gesamtisolation bezüglich Alterung, Einsatz unter extremen Temperaturen, Imprägniereigenschaften, Trocknungseigenschaften, elektrische Eigenschaften und Wärmeübertragungseigenschaften verbessert werden können.3. The method according to claim 1, characterized in that by the Mixing the hygroscopic liquid with the mineral oil Properties of total insulation with regard to aging, use under extreme temperatures, impregnation properties, Drying properties, electrical properties and Heat transfer properties can be improved. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß bei bereits im Betrieb befindlichen Hochspannungsgeräten ein bestimmter Teil der Isolierflüssigkeit durch eine hygroskopische Isolierflüssigkeit ersetzt wird.4. The method according to claim 1, characterized in that when already in Operating high voltage equipment a certain part of the Insulating liquid replaced by a hygroscopic insulating liquid becomes. 5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß bei neuen Hochspannungsgeräten die Festisolation zunächst mit einer hygroskopischen Isolierflüssigkeit imprägniert und anschließend mit Mineralöl weitergefüllt wird, wodurch die Trocknung verbessert und die Gefahr der Delamination sowie von Gaseinschlüssen verringert wird.5. The method according to claim 1, characterized in that in new High-voltage devices with a fixed insulation impregnated hygroscopic insulating liquid and then with Mineral oil is refilled, which improves drying and the Risk of delamination and gas inclusions is reduced.
DE1999146641 1999-09-14 1999-09-14 Improving electrical and aging characteristics of oil-filled high voltage equipment comprises adding hygroscopic insulant liquid to mineral oil Withdrawn DE19946641A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1999146641 DE19946641A1 (en) 1999-09-14 1999-09-14 Improving electrical and aging characteristics of oil-filled high voltage equipment comprises adding hygroscopic insulant liquid to mineral oil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1999146641 DE19946641A1 (en) 1999-09-14 1999-09-14 Improving electrical and aging characteristics of oil-filled high voltage equipment comprises adding hygroscopic insulant liquid to mineral oil

Publications (1)

Publication Number Publication Date
DE19946641A1 true DE19946641A1 (en) 2000-04-20

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Family Applications (1)

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DE1999146641 Withdrawn DE19946641A1 (en) 1999-09-14 1999-09-14 Improving electrical and aging characteristics of oil-filled high voltage equipment comprises adding hygroscopic insulant liquid to mineral oil

Country Status (1)

Country Link
DE (1) DE19946641A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7833440B2 (en) 2004-05-28 2010-11-16 Areva T&D Sa High performance dielectric oil and the use thereof in high voltage electrical equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7833440B2 (en) 2004-05-28 2010-11-16 Areva T&D Sa High performance dielectric oil and the use thereof in high voltage electrical equipment

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OAV Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1
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8181 Inventor (new situation)

Free format text: BORSI, HOSSEIN, 30167 HANNOVER, DE GOCKENBACH, ERNST, 31303 BURGDORF, DE FOFANA, ISOUF, DR., 30165 HANNOVER, DE BASTIAN, JUERGEN, OPHAIN, BE

8110 Request for examination paragraph 44
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