EP1103988B1 - Traversée - isolateur, calibrée à semi-capacité, remplie de gaz isolant, comme le SF6 - Google Patents

Traversée - isolateur, calibrée à semi-capacité, remplie de gaz isolant, comme le SF6 Download PDF

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Publication number
EP1103988B1
EP1103988B1 EP00107732A EP00107732A EP1103988B1 EP 1103988 B1 EP1103988 B1 EP 1103988B1 EP 00107732 A EP00107732 A EP 00107732A EP 00107732 A EP00107732 A EP 00107732A EP 1103988 B1 EP1103988 B1 EP 1103988B1
Authority
EP
European Patent Office
Prior art keywords
capacitance
insulating
semi
graded bushing
electrode
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.)
Expired - Lifetime
Application number
EP00107732A
Other languages
German (de)
English (en)
Other versions
EP1103988A3 (fr
EP1103988A2 (fr
Inventor
Giorgio Villa
Giancarlo Villa
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.)
Passoni e Villa SpA
Original Assignee
Passoni e Villa Fabbrica Isolatori e Condensatori SpA
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 Passoni e Villa Fabbrica Isolatori e Condensatori SpA filed Critical Passoni e Villa Fabbrica Isolatori e Condensatori SpA
Publication of EP1103988A2 publication Critical patent/EP1103988A2/fr
Publication of EP1103988A3 publication Critical patent/EP1103988A3/fr
Application granted granted Critical
Publication of EP1103988B1 publication Critical patent/EP1103988B1/fr
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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 present invention concerns a semi-capacitance graded bushing insulator of the type with insulating filling of a gas, such as for example sulphur hexafluoride (SF 6 ).
  • a gas such as for example sulphur hexafluoride (SF 6 ).
  • the present invention aims to provide a semi-capacitance graded bushing insulator which permits the exposure in air of a high-tension conductor capable of carrying current in the connection between an aerial line and an electrical apparatus such as for example a switch, a gas insulated system (GIS), a gas insulated line (GIL) and similar, containing gas under pressure.
  • an electrical apparatus such as for example a switch, a gas insulated system (GIS), a gas insulated line (GIL) and similar, containing gas under pressure.
  • GIS gas insulated system
  • GIL gas insulated line
  • US 3,467,938 discloses condenser bushings of the type provided by winding layers of electrical insulation, and a method for attaching electrical conductors to the conducting condenser elements and leading the conductors to the outside of the insulation without subsequently cutting the insulation.
  • a condenser bushing comprising layers of insulation material is wound around a central conductor.
  • Conductive condenser elements or foils are placed between layers of the insulation at properly determined radially spaced intervals throughout the buildup of layers of electrical insulating material.
  • a conductor is attached to the conductor foils or condenser elements when they are placed in position between the layers of electrical insulation.
  • the conductor is wound between the layers of insulation and played along with the insulation at a slight displacement of each turn of the conductor and fed out beyond the last turn of the electrical insulation where the conductor may be connected to an appropriate terminal. While this prior art system solves the problem of bringing connection to the outside of the insulation where it may be connected to a proper terminal, in this system the coil is wounded on a lathe, a fact that may create possible defects, such as undesired ovalization defects in the roundness of the lathe made coil.
  • the main object of the present invention is that of reducing to the maximum extent the cost of the apparatus for voltages equal to or greater than 220 kV.
  • the insulating space between the central conductor and the flange is divided into two parts.
  • the first part is formed by the insulating gas and the second part, nearer the flange, is formed by an insulating capacitance body of reduced dimensions having (i) an insulation of plastics material, usually polypropylene, impregnated with SF 6 , or (ii) an insulation of resin-impregnated paper.
  • the dimensions of the insulation while being limited by the width of the insulating sheet, permit good distribution of the electrical field around the flange and along a good part of the external insulator. Distribution of the electric field relative to the upper part is ensured by the prolongation of the tube on which the insulating capacitance body is wound and which operates as a distribution electrode. That distribution electrode and the upper electrode, at the potential of the head 3 and the upper plate 2, permit good longitudinal distribution also in the upper zone of the porcelain and in the contiguous region of the head of the graded bushing.
  • the electric field including the radial field, is distributed uniformly by taking account of the capacitance of the two insulating means calculated with the respective dielectric constants.
  • the gradients are contained in the limits permitted by the two types of dielectric.
  • the other great advantage is that the gas which surrounds the conductor also acts as a carrier for transfer of the heat produced by the current flowing in the conductor.
  • the bushing is formed by a conductor 1 fixed to a plate 2, in the upper part, and in the lower part it is fixed by way of a movable contact 4 to the fixed electrode 5 of the gas insulated bus-duct 6.
  • the bushing also includes an insulating capacitance body 7 formed by a winding of insulating material, in general plastics film or resin-impregnated paper, into which conductive or semi-conductive foils 8 are inserted as armatures, wound on a tube 9 which is prolonged with respect to the insulating body in such a way as to operate as an electrode which is suitably screened with end rings 10.
  • the insulating capacitance body 7 is supported within a flange 11 which is fixed with respect to the external porcelain 12 by way of a cemented collar 13, and is fixed to an insulating tube 14 of glass fibre-reinforced resin disposed in the interior of the porcelain 12 to forestall the thermal shock caused by a possible internal short-circuit.
  • the assembly is filled with insulating gas under pressure, generally SF 6 .
  • the capacitance comprising the conductor 1 and the electrode 6 as plates or foils, and the gas as dielectric, is disposed in cascade relationship with the capacitance of the insulating capacitance body and thus stabilises distribution of the voltage which is suitably calculated taking into account the respective dielectric constants.
  • an electrode 15 is connected to the plate 2 and thus to the full voltage.
  • a capacitance tap 18 which, besides checking the capacitance and the tg ⁇ of the bushing, can with suitable capacitive matching be used as a tap for measuring the voltage and/or for actuation of members for protecting the high-tension line.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)
  • Insulating Bodies (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Claims (6)

  1. Traversée électrique isolée échelonnée semi-capacitive comprenant :
    un conducteur (1) fixé à la partie supérieure à une plaque (2) de la tête (3) et, à la partie inférieure, par l'intermédiaire d'un contact mobile (4) à l'électrode fixe (5) du canal de barre (6) isolé au gaz ;
    un logement (12) externe en porcelaine ;
    un corps isolant (7) capacitif formé d'un enroulement de matériau isolant, en général un film en matière plastique ou du papier imprégné de résine, dans lequel sont insérées des feuilles conductrices ou semi-conductrices jouant le rôle d'armatures (8) ;
    caractérisé par un tube (9) qui est prolongé par rapport au corps isolant (7) capacitif de façon à fonctionner comme une électrode blindée de façon avantageuse par des anneaux (10) d'extrémité, le corps isolant (7) capacitif étant supporté par un flasque (11) qui est fixé par rapport à la porcelaine externe (12) au moyen d'un collier cimenté (13) ; et
    un tube (14) en résine renforcé en fibres de verre disposé à l'intérieur de la porcelaine (12), caractérisé en ce que l'ensemble est rempli de gaz isolant sous pression, généralement du SF6, et en ce que la capacité ayant le conducteur (1) et l'électrode (9) comme des feuilles de plaque et le gaz comme diélectrique est disposée en cascade avec la capacité du corps isolant (7) capacitif et stabilise ainsi la distribution de la tension qui est calculée de façon appropriée en prenant en compte également les constantes diélectriques respectives.
  2. Traversée électrique isolée échelonnée semi-capacitive selon la revendication 1, caractérisée en ce qu'une électrode (15) pour la distribution du champ électrique dans la zone située autour de l'électrode terminale (16) est connectée à la plaque (2) et ainsi à la pleine tension.
  3. Traversée électrique isolée échelonnée semi-capacitive selon la revendication 2, caractérisée en ce qu'il est prévu à l'intérieur du tube au moins une électrode (17) intermédiaire supplémentaire qui est utilisée en particulier pour de très hautes tensions, c'est-à-dire des tensions supérieures à 550 kV.
  4. Traversée électrique isolée échelonnée semi-capacitive selon l'une quelconque des revendications 1 à 3, caractérisée en ce qu'il est prévu une prise capacitive (18) qui, en plus de contrôler la capacité et la tgδ de la traversée électrique échelonnée, peut avec une correspondance capacitive appropriée être utilisée comme une prise pour mesurer la tension et/ou pour actionner des organes de protection pour la ligne à haute tension.
  5. Traversée électrique isolée échelonnée semi-capacitive selon l'une quelconque des revendications 1 à 4, caractérisée en ce que le corps isolant (7) capacitif est enroulé sur le tube (9) et fixé au tube (14) en résine renforcée en fibres de verre, l'armature (8) extérieure étant connectée de façon optionnelle au flasque (11).
  6. Traversée électrique isolée échelonnée semi-capacitive selon l'une quelconque des revendications précédentes, caractérisée en ce que, au lieu de la porcelaine externe (12), est utilisé un conteneur isolant cylindrique qui peut ou non être équipé d'ailettes en un matériau polymère tel que du silicone, de l'EPDM ou autres.
EP00107732A 1999-11-26 2000-04-11 Traversée - isolateur, calibrée à semi-capacité, remplie de gaz isolant, comme le SF6 Expired - Lifetime EP1103988B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999MI002481A IT1313854B1 (it) 1999-11-26 1999-11-26 Isolatore passante a semi-condensatore del tipo a riempimento di gasisolante, quale sf6.
ITMI992481 1999-11-26

Publications (3)

Publication Number Publication Date
EP1103988A2 EP1103988A2 (fr) 2001-05-30
EP1103988A3 EP1103988A3 (fr) 2002-01-02
EP1103988B1 true EP1103988B1 (fr) 2005-11-30

Family

ID=11384037

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00107732A Expired - Lifetime EP1103988B1 (fr) 1999-11-26 2000-04-11 Traversée - isolateur, calibrée à semi-capacité, remplie de gaz isolant, comme le SF6

Country Status (3)

Country Link
EP (1) EP1103988B1 (fr)
DE (1) DE60024399T2 (fr)
IT (1) IT1313854B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101506911B (zh) * 2006-08-31 2011-04-06 Abb技术有限公司 高压套管

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL206279B1 (pl) * 2004-06-29 2010-07-30 Abb Spółka Z Ograniczoną Odpowiedzialnościąabb Spółka Z Ograniczoną Odpowiedzialnością Pojemnościowy korpus izolacyjny wysokonapięciowego przepustu
EP1624311A1 (fr) * 2004-08-06 2006-02-08 Passoni & Villa Fabbrica Isolatori e Condensatori S.p.A. Transformateur de mesures combiné en courant et tension pour condensateur de traverse
CN100505120C (zh) * 2004-11-01 2009-06-24 王如璋 具有光信号输出的干式互感器
CN101572140B (zh) * 2009-05-27 2011-08-17 江苏省电力公司无锡供电公司 地线接地型绝缘子结构
RU2638298C1 (ru) * 2014-02-05 2017-12-13 Абб Текнолоджи Лтд. Сердечник конденсатора
CN109559861A (zh) * 2018-11-23 2019-04-02 国网江苏省电力有限公司经济技术研究院 一种干式高压电容芯子
CN112038015B (zh) * 2020-09-01 2022-06-03 沈阳工业大学 一种电容式高温固体电储热装置穿墙套管的设计方法
EP3989242A1 (fr) * 2020-10-23 2022-04-27 Hitachi Energy Switzerland AG Bride de douille électrique et douille électrique
CN112530645B (zh) * 2020-12-19 2022-02-18 醴陵华鑫电瓷科技股份有限公司 一种空心复合绝缘子

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647938A (en) * 1971-03-24 1972-03-07 Westinghouse Electric Corp Condenser bushing with flexible conductor connections attached to the condenser elements
JPH0727739B2 (ja) * 1990-11-30 1995-03-29 日本碍子株式会社 ガス封入絶縁機器用の防爆碍管及びその製造法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101506911B (zh) * 2006-08-31 2011-04-06 Abb技术有限公司 高压套管

Also Published As

Publication number Publication date
IT1313854B1 (it) 2002-09-24
DE60024399T2 (de) 2006-08-17
EP1103988A3 (fr) 2002-01-02
ITMI992481A1 (it) 2001-05-26
EP1103988A2 (fr) 2001-05-30
DE60024399D1 (de) 2006-01-05
ITMI992481A0 (it) 1999-11-26

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