EP0285895B1 - Dispositif d'isolation haute tension pour self et transformateurs, en particulier destiné à la transmission de courant continu à haute tension - Google Patents

Dispositif d'isolation haute tension pour self et transformateurs, en particulier destiné à la transmission de courant continu à haute tension Download PDF

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Publication number
EP0285895B1
EP0285895B1 EP88104507A EP88104507A EP0285895B1 EP 0285895 B1 EP0285895 B1 EP 0285895B1 EP 88104507 A EP88104507 A EP 88104507A EP 88104507 A EP88104507 A EP 88104507A EP 0285895 B1 EP0285895 B1 EP 0285895B1
Authority
EP
European Patent Office
Prior art keywords
voltage
pressboard
solid
barriers
matter
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
EP88104507A
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German (de)
English (en)
Other versions
EP0285895A1 (fr
Inventor
Dieter Dipl.-Ing. Breitfelder
Walter Dr. Müller
Werner Dr. Stein
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
Priority to AT88104507T priority Critical patent/ATE73572T1/de
Publication of EP0285895A1 publication Critical patent/EP0285895A1/fr
Application granted granted Critical
Publication of EP0285895B1 publication Critical patent/EP0285895B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • 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
    • H01F27/02—Casings
    • H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements

Definitions

  • the invention relates to a high-voltage insulation arrangement for transformers and choke coils, in particular for high-voltage direct current transmission (HVDC) with simultaneous loading by direct and alternating voltage and by surge voltages, with insulating sections consisting of successive sections alternating between solid insulating material and transformer oil.
  • HVDC high-voltage direct current transmission
  • the insulations are designed with regard to the loads caused by the AC voltage, and it has proven to be very advantageous that the dielectric constants of solid insulating materials to oil behave approximately as 2: 1.
  • the oil used for cooling in these devices contributes significantly to the electrical insulation of the live parts.
  • the invention is therefore based on the object of creating a high-voltage insulation arrangement for transformers and choke coils for high-voltage direct current transmission which can withstand simultaneous stresses from alternating, direct and surge voltage and which can nevertheless be implemented with only a small amount of manufacturing and other outlay.
  • Advantageous embodiments of the invention consist in that some or all of the solid barriers are made of electrically conductive paper, that all solid barriers are of the same thickness and that the distances between the solid barriers from one another increase with the distance from the highest direct voltage potential.
  • the solid barriers are designed as concentric cylinder jackets and, in the case of a transformer, comprise the connection point of the inner connection of a bushing with the high-voltage discharge of a winding, or the insulating material barriers are designed as angle rings and comprise the high-voltage end of a transformer winding.
  • the high-voltage insulation arrangement according to the invention is very advantageous because it can be carried out with a minimum of specifically practically uniformly stressed solid barriers, because the dielectric constant of the press chip remains unchanged even with increased conductivity, so that due to the increased conductivity of the solid barriers, the direct voltage field does not, however, do so due to the dielectric constant certain alternating field is changed. Accordingly, there is an advantageous application for the insulation arrangement according to the invention wherever inhomogeneous DC voltage fields occur. This is, for example, for the edge insulation of the valve windings of HVDC transformers as well as for their rejection until implementation and the case with DC cables.
  • a conductor pin 1 carries a paper roll 2 and is part of a high-voltage bushing, not shown, with a porcelain body for connecting electrical devices, for example transformers, choke coils or rectifiers, to a high-voltage direct current transmission line.
  • electrical devices for example transformers, choke coils or rectifiers
  • the potential carried by the conductor pin 1 is capacitively reduced at least in the region of a flange for fastening the bushing on a device cover to zero or neutral point potential.
  • the paper roll 2 is mechanically held together by a porcelain cap 4 concentrically enveloping it and is relieved of stress.
  • the porcelain cap 4 extends to a flange carrying the bushing and separates the oil-filled space of the connected electrical device from an oil chamber 3 of the bushing.
  • the conductor pin 1 carries at its lower end a clamping plate 5 to which a contact piece 7 carried by the upper end of a flexible conductor cable 6 can be screwed.
  • the lower end of the conductor cable 6 is firmly connected by a further contact piece 8 to a clamping plate 9 on the free end of a winding lead 10.
  • the conductor cable 6 with its contact pieces 7 and 8, clamping pieces 5 and 9 as well as the free ends of the conductor bolt 1 and the winding rejection 10 are in the operating position in a goblet-shaped shield body 11, the inner surfaces of which electrically conductive layer, for example made of copper, and the outward-facing side consists of a plurality of paper layers or pressboard.
  • the parts carrying high voltage potential, in particular the conductor cable 6, are galvanically connected to the electrically conductive layer on the inside of the shield body 11.
  • the porcelain cap 4 and the screen body 11 are concentrically surrounded by an inner solid barrier 12 and from the inside to the outside by cylindrical jacket-shaped solid barriers 13, 14, 15, 16 and 17.
  • An oil channel 18 is located between radially successive solid barriers 12 to 17.
  • the clear width of oil channels 18 increases with the distance from solid barrier 12.
  • Solid barrier 12 is retracted radially at the top of screen body 11 and carries a collar 19 there which includes the lower end of the solid barrier 13 outside.
  • the solid barriers 12 to 17 and the oil channels 18 are surrounded on the outside by a dome wall 20 concentric to them. The only partially shown dome carries the above-mentioned high voltage bushing on its upper flange.
  • the solid barriers 11, 12 to 17 consist of pressboard in the illustrated embodiment. 11, 12 and 13 pressboard with increased conductivity compared to normal pressboard is used to produce the solid barriers.
  • the pressboard used in both solid barriers 11 and 12 has a specific electrical resistance that only corresponds to 2 to 10 times the value of the specific resistance of the transformer oil.
  • the solid barrier 17 is made of normal pressboard, the specific resistance of which corresponds approximately to 100 times the specific resistance of the transformer oil.
  • the specific resistances of the pressboard types from which the solid barriers 13, 14, 15 and 16 are made are graded so that in any case for the specific resistances of neighboring solid barriers give the same ratio.
  • the dielectric constant of all types of pressboard used is the same.
  • the alternating voltage field is also constructed analogously to that of conventional solid barriers.
  • the direct voltage field is approximately analogous to the alternating voltage field.
  • there is an increased field strength of the DC voltage field on the high voltage side due to the lowering of the specific resistance of the press chip down to the order of magnitude of the specific resistance of the transformer oil and on the other hand the zero potential side of the isolating path due to the normal press chip in the solid fuel barrier 17 which is significantly higher impedance than the transformer oil avoided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Of Coils (AREA)
  • Coils Of Transformers For General Uses (AREA)

Claims (7)

  1. Dispositif d'isolation haute tension pour des transformateurs et des bobines d'arrêt, notamment pour le transport d'un courant continu à haute tension (HGÜ), moyennant l'application simultanée d'une contrainte due à une tension continue et à une tension alternative ainsi qu'à des impulsions de tension, des sections d'isolation étant constituées de sections partielles successives formées alternativement par des matériaux isolants solides et par l'huile du transformateur,
    caractérisé par le fait
    - que des barrières (12 à 17) formées de matériaux solides et servant à adapter le champ de tension continu au champ de tension alternative sont constituées par du presspahn possédant une conductivité électrique accrue de façon échelonnée par rapport au presspahn usuel,
    - que la résistance spécifique du presspahn présentant la conductivité électrique maximale est supérieure, seulement environ entre le double et le décuple, à celle de l'huile du transformateur, la constante diélectrique du presspahn étant, indépendamment de la valeur de sa résistance spécifique, égale approximativement au double de celle de l'huile du transformateur, et
    - que le presspahn possédant la conductivité électrique maximale est disposé respectivement à l'extrémité de la section isolante, au niveau de laquelle les surfaces équipotentielles possèdent des rayons de courbure plus petits qu'à l'autre extrémité.
  2. Dispositif d'isolation haute tension suivant la revendication 1, caractérisé par le fait qu'une partie de la totalité des barrières (12 à 17) formées de matériaux solides est formée par un papier électriquement conducteur.
  3. Dispositif d'isolation à haute tension suivant la revendication 1 ou 2, caractérisé par le fait que les barrières (12 à 17) constituées par les matériaux solides possèdent toutes la même épaisseur.
  4. Dispositif isolant haute tension suivant l'une des revendications 1 à 3, caractérisé par le fait que les distances réciproques entre les barrières (12 à 17) formées de matériaux solides augmentent avec la distance par rapport au potentiel maximum de tension continue.
  5. Dispositif d'isolation à haute tension suivant l'une des revendications 1 à 4, caractérisé par le fait que les barrières (17) formées de matériaux solides, qui sont les plus éloignées du potentiel maximum de tension continue, sont constituées par un matériau possédant une résistance électrique spécifique approximativement 100 fois supérieure à celle de l'huile du transformateur.
  6. Dispositif d'isolation à haute tension suivant l'une des revendications 1 à 5, caractérisé par le fait que les barrières (13 à 17) formées de matériaux solides sont réalisées sous la forme d'enveloppes cylindriques concentriques, et, dans le cas d'un transformateur, enserrent la zone de jonction entre le raccord intérieur d'une traversée (1) et le conducteur de sortie à haute tension (10) d'un enroulement.
  7. Dispositif d'isolation à haute tension suivant l'une des revendications 1 à 6, caractérisé par le fait que les barrières formées de matériaux solides sont réalisées sous la forme d'anneaux en forme de L en coupe transversale et enserrent l'extrémité, située du côté haute tension, d'un enroulement du transformateur.
EP88104507A 1987-04-09 1988-03-21 Dispositif d'isolation haute tension pour self et transformateurs, en particulier destiné à la transmission de courant continu à haute tension Expired - Lifetime EP0285895B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88104507T ATE73572T1 (de) 1987-04-09 1988-03-21 Hochspannungsisolationsanordnung fuer transformatoren und drosselspulen, insbesondere zur hochspannungs-gleichstrom-uebertragung (hgue).

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3712034 1987-04-09
DE3712034 1987-04-09

Publications (2)

Publication Number Publication Date
EP0285895A1 EP0285895A1 (fr) 1988-10-12
EP0285895B1 true EP0285895B1 (fr) 1992-03-11

Family

ID=6325247

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88104507A Expired - Lifetime EP0285895B1 (fr) 1987-04-09 1988-03-21 Dispositif d'isolation haute tension pour self et transformateurs, en particulier destiné à la transmission de courant continu à haute tension

Country Status (3)

Country Link
EP (1) EP0285895B1 (fr)
AT (1) ATE73572T1 (fr)
DE (1) DE3868959D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011008462A1 (de) * 2011-01-07 2012-07-12 Siemens Aktiengesellschaft Schirmring für eine HGÜ-Transformatorspule oder eine HGÜ-Drosselspule
DE102011008454A1 (de) * 2011-01-07 2012-07-26 Siemens Aktiengesellschaft Isolationsanordnung für eine HGÜ-Komponente mit wandartigen Feststoffbarrieren
CN104067359A (zh) * 2012-01-26 2014-09-24 西门子公司 用于导电连接元件的屏蔽装置
CN105097228A (zh) * 2014-05-07 2015-11-25 Abb技术有限公司 高压电磁感应装置

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2771505B2 (ja) * 1996-03-14 1998-07-02 株式会社日立製作所 直流ブッシング
DE102006008922B4 (de) * 2006-02-21 2009-01-02 Siemens Ag Elektrische Abschirmanordnung
US7994427B2 (en) * 2006-03-24 2011-08-09 Abb Technology Ltd. High voltage insulation system and a method of manufacturing same
CN101373655B (zh) * 2007-08-20 2013-12-04 特变电工股份有限公司 一种铁心电抗器
WO2010060450A1 (fr) * 2008-11-28 2010-06-03 Siemens Aktiengesellschaft Dispositif de barrières pour passage pour câbles
BR112012023429B1 (pt) 2010-03-16 2019-07-09 Siemens Aktiengesellschaft Disposição de conexão de múltiplos contatos para conexão elétrica de um componente elétrico com uma conexão elétrica e sistema de linhas de orientação com uma disposição de conexão de múltiplos contatos
DE102011008456A1 (de) * 2011-01-07 2012-07-12 Siemens Aktiengesellschaft Leitungsführung für HGÜ-Transformatorspulen oder HGÜ-Drosselspulen
DE102011008461A1 (de) * 2011-01-07 2012-07-12 Siemens Aktiengesellschaft Trennstelle einer Leitungsdurchführung für eine HGÜ-Komponente
DE102011008459A1 (de) 2011-01-07 2012-07-12 Siemens Aktiengesellschaft Leitungsdurchführung für die Kesselwand einer HGÜ-Komponente
EP3934036A1 (fr) * 2020-06-30 2022-01-05 Siemens Aktiengesellschaft Traversée haute tension et dispositif électrique haute tension pourvu d'une traversée haute tension

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1049971B (fr) * 1959-02-05
DE592264C (de) * 1925-06-09 1934-02-03 Felten & Guilleaume Carlswerk Hartpapierdurchfuehrung, in der die Stellen hoeherer elektrischer Beanspruchung aus Isolierstoff von hoeherer Dielektrizitaetskonstante als der uebrige Isolierstoff bestehen
DE891713C (de) * 1941-09-12 1953-10-01 Siemens Ag Hochspannungstransformator mit sterngeschalteter Hochspannungslagenwicklung
GB659222A (en) * 1949-05-17 1951-10-17 British Thomson Houston Co Ltd Improvements in high voltage electrical insulating bushings
DE1268720B (de) * 1964-09-21 1968-05-22 Licentia Gmbh Schirmringanordnung fuer Wicklungen von oelgefuellten Transformatoren, Messwandlern und Drosselspulen
DE1293328B (de) * 1966-10-03 1969-04-24 Licentia Gmbh Mit Schilden versehene Lagenwicklung
DE1816492A1 (de) * 1968-12-23 1970-08-06 Licentia Gmbh Wicklung fuer Transformatoren,Drosselspulen u.dgl.Geraete mit hohem Gleichspannungspotential

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011008462A1 (de) * 2011-01-07 2012-07-12 Siemens Aktiengesellschaft Schirmring für eine HGÜ-Transformatorspule oder eine HGÜ-Drosselspule
DE102011008454A1 (de) * 2011-01-07 2012-07-26 Siemens Aktiengesellschaft Isolationsanordnung für eine HGÜ-Komponente mit wandartigen Feststoffbarrieren
CN103415901A (zh) * 2011-01-07 2013-11-27 西门子公司 用于高压直流输电变压器线圈或扼流线圈的屏蔽环
CN103415901B (zh) * 2011-01-07 2017-05-17 西门子公司 用于高压直流输电变压器线圈或扼流线圈的屏蔽环
CN104067359A (zh) * 2012-01-26 2014-09-24 西门子公司 用于导电连接元件的屏蔽装置
CN104067359B (zh) * 2012-01-26 2016-11-16 西门子公司 用于导电连接元件的屏蔽装置
CN105097228A (zh) * 2014-05-07 2015-11-25 Abb技术有限公司 高压电磁感应装置
CN105097228B (zh) * 2014-05-07 2017-04-12 Abb 技术有限公司 高压电磁感应装置

Also Published As

Publication number Publication date
ATE73572T1 (de) 1992-03-15
DE3868959D1 (de) 1992-04-16
EP0285895A1 (fr) 1988-10-12

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