EP1133775A1 - Traversee haute tension - Google Patents

Traversee haute tension

Info

Publication number
EP1133775A1
EP1133775A1 EP99969826A EP99969826A EP1133775A1 EP 1133775 A1 EP1133775 A1 EP 1133775A1 EP 99969826 A EP99969826 A EP 99969826A EP 99969826 A EP99969826 A EP 99969826A EP 1133775 A1 EP1133775 A1 EP 1133775A1
Authority
EP
European Patent Office
Prior art keywords
insulator
voltage
section
shields
flange
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Withdrawn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
EP99969826A
Other languages
German (de)
English (en)
Inventor
Helmut Frielingsdorf
Gunnar Tolksdorf
Martin Eiselt
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.)
HOCHSPANNUNGSGERAETE PORZ GmbH
Siemens AG
Original Assignee
HOCHSPANNUNGSGERAETE PORZ GmbH
Siemens AG
Hochspannungsgerate Porz GmbH
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 HOCHSPANNUNGSGERAETE PORZ GmbH, Siemens AG, Hochspannungsgerate Porz GmbH filed Critical HOCHSPANNUNGSGERAETE PORZ GmbH
Publication of EP1133775A1 publication Critical patent/EP1133775A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • H01B17/28—Capacitor type

Definitions

  • the invention relates to a high-voltage bushing with a high-voltage conductor in an insulator provided with insulator shields, which has a flange at one end through which the high-voltage conductor is passed, an insulation medium being provided between the flange and the high-voltage conductor.
  • Such a high-voltage bushing is known from US Pat. No. 2,099,666.
  • This high-voltage bushing has two tubular, porcelain insulators, which are on different end faces of an annular
  • a high-voltage conductor is guided axially through the insulators and the flange.
  • Each of the insulators has insulator screens arranged regularly over its respective length. However, the number of insulator screens per unit length is different for the two insulators.
  • An insulation medium is provided in the interior of the insulator, and there are also tubular insulation barriers (not shown in more detail), each of which coaxially surrounds the high-voltage conductor.
  • the invention has for its object to provide a high-voltage bushing of the type mentioned, which is characterized by a relatively high dielectric strength.
  • the object is achieved in a high-voltage implementation of the type mentioned in that a shield electrode is arranged between the high-voltage conductor and the insulator, which extends from the flange in the axial direction over part of the length of the insulator, and that the insulator in one first section, which is adjacent to the free end of the shield electrode, has a higher number of insulator shields per unit length than in a second section adjoining the first section. If necessary, more than two sections are also conceivable, two of which can have the same insulator shield density.
  • the shield electrode in the region of the flange makes the electrical field strength distribution in the axial direction more uniform, so that there the likelihood of an electrical flashover is reduced.
  • the increased electrical longitudinal stress of the insulator in the region of the free end of the shield electrode facing away from the flange is taken into account in that the higher number of insulator shields per unit length results in a higher dielectric strength in the longitudinal direction.
  • the number of insulator screens per unit length in the first area is preferably approximately twice as high as in the second area. In this way, there is a regular arrangement of the insulator shields within the sections, each of which has defined electrical properties.
  • the insulator shields preferably alternately have a first or a second diameter in the first region, the first diameter being larger than the second diameter.
  • intermediate shields with a smaller diameter are arranged between insulator shields of the same diameter.
  • the insulator screens with the larger shield most diameter - thus protect - the insulator screens with the smaller second diameter largely against dirt and rain, so that a reduction in electrical strength due to dirt and / or moisture on the surface of the insulator screens is avoided.
  • the distance between the insulator shields with the larger diameter corresponds approximately to the distance between the insulator shields in the second section.
  • SF6 is an insulating gas that is particularly effective in the high-voltage range, which further reduces the likelihood of a flashover.
  • Outdoor bushing in high voltage technology Applications of the invention are also in medium-voltage systems or in high-voltage transformers, e.g. as transformer implementation possible.
  • the insulator shields are preferably made of a silicone material.
  • the silicone material has the advantage over a porcelain design that the insulator shields can be manufactured individually or for partial areas. The insulator can therefore be manufactured in pieces.
  • the insulator preferably has an insulator body on which the insulator shields are arranged and which is made of porcelain or a composite material, in particular a glass fiber-reinforced cast resin.
  • the length of the insulator body can be dimensioned according to the specification, and the required number and type of insulator shields can be arranged on the insulator body depending on the requirement.
  • the production of the implementation itself is simplified. An embodiment of the invention, further advantages and details are explained below with reference to the drawing.
  • the single figure shows a high-voltage bushing 1 in longitudinal section, which has a high-voltage conductor 5 which is guided through an insulator 3 provided with insulator shields 19.
  • the high-voltage conductor 7 has the connection ends 9a and 9b at the end.
  • an electrical component for. B. a high-voltage switchgear or a transformer
  • a flange 5 is provided.
  • the insulator 3 is closed gas-tight with a cover 11.
  • the high-voltage bushing 1 has a shield electrode 15 which extends from the flange 5 in the axial direction over part of the length of the insulator 3.
  • the shield electrode 15 is electrically connected to the flange 5 and serves to roughly control the electrical field to control the possibly very high field strengths between the flange 5 or the insulator 3 and the high-voltage conductor 7.
  • the shielding electrode 15 is the electrical field present during operation in particular in the area of the flange 5. So there is the probability of an electrical one
  • the insulator 3 in section A which is adjacent to the free end 17 of the shield electrode 15 and in which the increased longitudinal stress occurs, has a higher number of insulator shields 19 with respect to the same length than in the adjacent section B.
  • the Section A has a higher insulator shield density than Section B.
  • the number of insulator screens 19 in the first section A is about twice as high as the number in the second section B.
  • the insulator screens 19 are arranged in the first section A at a distance from one another that is approximately half as large as that of the insulator screens 19 in the second Section B.
  • an insulator shield 21 is inserted between each two adjacent insulator shields 19, the dimensions of which correspond approximately to those of the second section B, so that they are arranged alternately.
  • the insulator shields 21 have a diameter that is smaller than the diameter of the insulator shields 19.
  • the insulator screens 19 shield - ie protect - the insulator screens 21 largely against dirt and moisture. A reduction in the insulation strength due to contamination or moisture on the outside of the insulator 3 is thus avoided.
  • the insulator 3 is preferably designed as a composite insulator.
  • the insulator shields 19, 21 are designed as silicone shields (ie made of a silicone material), which are arranged on an insulator body 23.
  • the insulator body 23 is made of a composite material, in particular a glass fiber reinforced cast resin.
  • bushing 1 according to the figure shows an area A, which is enclosed by areas B and C, which have the same insulator shield densities.
  • the areas are each adapted to the respective electrical requirements with regard to the field strength load and provided with appropriate shielding equipment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)

Abstract

L'invention concerne une traversée haute tension (1) comportant un conducteur haute tension (7) placé dans un isolateur (3) pourvu d'écrans isolants (19) et comportant une collerette (5) à une extrémité. Entre le conducteur haute tension (7) et l'isolateur (3) se trouve une électrode de blindage (15) qui s'étend dans le sens axial, à partir de la collerette (5), sur une partie de la longueur de l'isolateur (3). Cet isolateur (3) présente, dans une première section (A), adjacente à l'extrémité libre (17) de l'électrode de blindage (S), un nombre plus élevé d'écrans isolants (19) par unité de longueur qu'une seconde section (B) contiguë à la première section (A).
EP99969826A 1998-09-28 1999-09-23 Traversee haute tension Withdrawn EP1133775A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1998144409 DE19844409C2 (de) 1998-09-28 1998-09-28 Hochspannungs-Durchführung
DE19844409 1998-09-28
PCT/EP1999/007098 WO2000019453A1 (fr) 1998-09-28 1999-09-23 Traversee haute tension

Publications (1)

Publication Number Publication Date
EP1133775A1 true EP1133775A1 (fr) 2001-09-19

Family

ID=7882499

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99969826A Withdrawn EP1133775A1 (fr) 1998-09-28 1999-09-23 Traversee haute tension

Country Status (3)

Country Link
EP (1) EP1133775A1 (fr)
DE (1) DE19844409C2 (fr)
WO (1) WO2000019453A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE546818T1 (de) 2004-03-15 2012-03-15 Abb Research Ltd Hochspannungsdurchführung mit feldsteuermaterial
DE102006038221B4 (de) 2006-08-03 2009-03-26 Siemens Ag Vorrichtung zur elektrischen Abschirmung einer Hochspannungsdurchführung
CN102956333A (zh) * 2012-12-06 2013-03-06 山东彼岸电力科技有限公司 一种出线复合套管

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2099666A (en) * 1937-06-30 1937-11-16 Gen Electric High voltage liquid-filled bushing
CH318998A (de) * 1953-02-18 1957-01-31 Rhein Westfael Isolatoren Isolator für Hoch- und Niederspannung
PL122159B1 (en) * 1979-09-15 1982-06-30 Inst Elektrotechniki High tension overhead-line instulator of plastic materialx and method of manufacturing the samerytykh ustanovok i sposob izgotovlenija plastmassovogo izoljatora vysokogo naprjazhenija dlja otkrytykh ustanovok
US4296274A (en) * 1980-07-11 1981-10-20 The United States Of America As Represented By The United States Department Of Energy High voltage bushing having weathershed and surrounding stress relief collar
US5466891A (en) * 1994-04-08 1995-11-14 Abb Power T&D Company Inc. Conical composite SF6 high voltage bushing with floating shield
DE4426927A1 (de) * 1994-07-29 1996-02-01 Hoechst Ceram Tec Ag Elektrischer Isolator aus Silikongummi für Hochspannungsanwendungen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0019453A1 *

Also Published As

Publication number Publication date
WO2000019453A1 (fr) 2000-04-06
DE19844409C2 (de) 2000-12-21
DE19844409A1 (de) 2000-04-13

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Legal Events

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Owner name: HOCHSPANNUNGSGERAETE PORZ GMBH

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