EP0383988B1 - Passage à haut voltage pour appareils électriques réfrigérés à l'huile - Google Patents

Passage à haut voltage pour appareils électriques réfrigérés à l'huile Download PDF

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Publication number
EP0383988B1
EP0383988B1 EP89104925A EP89104925A EP0383988B1 EP 0383988 B1 EP0383988 B1 EP 0383988B1 EP 89104925 A EP89104925 A EP 89104925A EP 89104925 A EP89104925 A EP 89104925A EP 0383988 B1 EP0383988 B1 EP 0383988B1
Authority
EP
European Patent Office
Prior art keywords
voltage
voltage bushing
screen
fixed resistor
bushing according
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
EP89104925A
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German (de)
English (en)
Other versions
EP0383988A1 (fr
Inventor
Walter Dr.-Ing. Müller
Wolfgang Dipl.-Ing. Maxwitat
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 AT89104925T priority Critical patent/ATE93081T1/de
Publication of EP0383988A1 publication Critical patent/EP0383988A1/fr
Application granted granted Critical
Publication of EP0383988B1 publication Critical patent/EP0383988B1/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
    • H01F27/02—Casings
    • H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements

Definitions

  • the invention relates to a high-voltage bushing for oil-cooled electrical devices, in particular high-voltage machine and mains transformers, in which components for the electrical and mechanical connection of the end of a feed-through conductor bolt to a high-voltage connecting lead lie in a cup-shaped shield.
  • Such a high-voltage bushing is known from DE-A-25 54 460.
  • This known implementation is connected to the end of the winding rejection to be connected via screw connections and flexible conductor sections. To avoid externally effective inhomogeneities of the electrical field, this screw connection together with the flexible conductor sections is completely immersed in a cup-shaped shield in the operating state.
  • DE-A-28 42 341 also already discloses an attenuator for cables for damping high-frequency vibrations emanating from switchgear assemblies when hitting transformers, for example in which a voltage-dependent resistor, a low-induction fixed resistor and a choke winding are provided in a concentric arrangement from the inside to the outside and electrically connected in parallel to one another.
  • the separate arrangement of such attenuators for cables before the input of high-voltage transformers requires an even larger space than results from the enlargement of transformer dimensions as a result of wiring the windings with ZnO elements.
  • the invention is therefore based on the object of creating a space-saving arrangement for resonance-sensitive high-voltage devices, such as, for example, mains or machine transformers, by which high-frequency vibrations caused by switching operations or the like are damped to such an extent that damage to the connected devices can be ruled out.
  • resonance-sensitive high-voltage devices such as, for example, mains or machine transformers
  • the object of the invention is achieved with a high-voltage bushing of the type mentioned in the introduction that a low-induction fixed resistor forming the end of the connecting conductor is spatially and electrically located between a chalice-shaped shield and a similar chalice-shaped shielding pot and that the load current is electrically parallel and spatially coaxial with the fixed resistor leading ironless choke winding is provided which includes the shielding pot at one end and the shielding at the other end.
  • the choke winding is wound from two radially superposed electrically parallel conductors which are spatially crossed out in the middle of the winding, and the fixed resistor consists of a stack of resistance disks lying against one another in the axial direction.
  • High-voltage bushings designed in accordance with the invention are very advantageous because they provide practically no particular space requirement by adding an attenuator to reliably protect the devices that are connected to them from high-frequency vibrations that resonate.
  • the relatively complex wiring of individual components of the devices to be protected can be dispensed with, as can attenuators to be set up next to these devices in special housings.
  • a high-voltage bushing 2 with a bushing conductor pin 3 is installed in the cover 1 of a transformer tank which is not shown in detail and is completely filled with oil and closed on all sides.
  • the lower end of the high-voltage bushing 2 dips into a goblet-shaped shield 4 together with the lower end of the bushing conductor pin 3.
  • the lower end of the feed-through conductor pin 3 carries flexible connecting leads 5, not shown, of which several are electrically connected in parallel and are evenly distributed over the circumference and connect the lead-through conductor stud 3 galvanically to a connecting plate 6 and to a winding end 7 of a choke winding 8.
  • connection plate 6 Coaxial to the axis of the high-voltage bushing 2, the connection plate 6 continues below the goblet-shaped shield 4 in a low-induction fixed resistor from a stack of resistance disks 9 lying against one another in the axial direction.
  • the resistance disks 9 lie concentrically within the choke winding 8. Both the choke winding 8 and the stack of the resistance disks 9 are supported on a goblet-shaped shielding pot 10, which carries an inclined chimney 11 for receiving a winding rejection 12.
  • the choke winding 8 is wound from two radially one above the other electrically connected parallel conductors, which are preferably represented by copper cables with a circular cross section and paper wrapping as insulation. To ensure a uniform current load on both conductors, they are crossed out in the middle of the choke winding 8 by cross-out conductors 16. The ends of the choke winding 8 are supported on press rings 13.
  • the fixed resistor located within the choke winding consists of a stack of nine resistance disks 9, of which only the middle one is spaced from the adjacent resistance disks by short supports 14.
  • the ends of the middle resistance disk 9 are electrically connected to the cross-out conductors 16 in the middle of the choke winding 8 via the supports 14 via potential bridges 15. Mutual voltage control of the fixed resistor and the choke winding 8 is thereby forced.
  • the high-voltage bushing 2 and the resistor disks 9 connected downstream thereof and the choke winding 8 are loaded with a low-frequency current, for example of 50 or 60 Hz.
  • the choke winding 8 drops significantly less than 0.1 o / oo of the operating voltage, and the resistance disks 9 contribute practically nothing to the current carrying, since their resistance is approximately 10 f times the resistance of the choke winding 8.
  • the voltage supplied via the high-voltage bushing 2 is consequently passed on to the winding lead-out 12 with almost no voltage drop.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Transformer Cooling (AREA)
  • Insulating Of Coils (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Rectifiers (AREA)
  • Organic Insulating Materials (AREA)

Claims (8)

  1. Traversée à haute tension pour des appareils électriques refroidis à l'huile, notamment dans des transformateurs de machines et des transformateurs du secteur, alimentés en haute tension et dans lesquels des composants (3,5) destinés à raccorder électriquement et mécaniquement l'extrémité d'un boulon conducteur de traversée (3) à un conducteur de raccordement (12) appliquant la haute tension, sont situés dans un blindage en forme de pot, caractérisée par le fait
    - qu'une résistance fixe (9), qui forme l'extrémité du conducteur de raccordement (12) et possède une faible inductance, est située spatialement et électriquement entre le blindage (4) en forme de pot et une coupelle de blindage (10) en forme de pot, semblable au blindage précédent, et
    - qu'il est prévu, selon un montage en parallèle du point de vue électrique et coaxial du point de vue spatial par rapport à la résistance fixe (9), un enroulement de self sans fer (8) et qui entoure par l'une de ses extrémités la coupelle de blindage (10) et par son autre extrémité le blindage (4).
  2. Traversée à haute tension suivant la revendication 1, caractérisée par le fait que l'enroulement de self (8) est formé par l'enroulement de deux conducteurs superposés radialement, branchés électriquement en parallèle et qui se croisent dans l'espace au centre de l'enroulement.
  3. Traversée à haute tension suivant la revendication 1 ou 2, caractérisée par le fait qu'une âme conductrice à section transversale circulaire est utilisée comme conducteur.
  4. Traversée à haute tension suivant l'une des revendications 1 à 3, caractérisée par le fait que la résistance fixe est constituée par un empilage de disques résistifs (9) appliqués les uns contre les autres dans la direction axiale.
  5. Traversée à haute tension suivant l'une des revendications 1 à 4, caractérisée par le fait que la traversée à haute tension (2) relie l'appareil électrique refroidi par huile directement à une installation de coupure isolée par du SF₆.
  6. Traversée à haute tension suivant l'une des revendications 1 à 5, caractérisée par le fait que la résistance fixe (9), l'enroulement de self (8) ainsi que le blindage (4) et la coupelle de blindage (10) sont prévus à proximité de la traversée à haute tension (2) sur le côté tourné vers l'installation de coupure.
  7. Traversée à haute tension suivant l'une des revendications 1 à 6, caractérisée par le fait que les résistances, qui sont actives pour une fréquence de service de 50 Hz ou 60 Hz, de l'enroulement de self (8) et de la résistance fixe (9), diffèrent d'un facteur égal à environ 10⁴.
  8. Traversée à haute tension suivant l'une des revendications 1 à 7, caractérisée par le fait que respectivement l'une des bornes du disque résistif médian (9) est raccordée galvaniquement, en plus de sa borne, au disque résistif voisin (9) respectivement par l'un de deux conducteurs croisés (16) de l'enroulement de self (8).
EP89104925A 1989-02-20 1989-03-20 Passage à haut voltage pour appareils électriques réfrigérés à l'huile Expired - Lifetime EP0383988B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89104925T ATE93081T1 (de) 1989-02-20 1989-03-20 Hochspannungsdurchfuehrung fuer oelgekuehlte elektrische geraete.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3905173 1989-02-20
DE3905173 1989-02-20

Publications (2)

Publication Number Publication Date
EP0383988A1 EP0383988A1 (fr) 1990-08-29
EP0383988B1 true EP0383988B1 (fr) 1993-08-11

Family

ID=6374519

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89104925A Expired - Lifetime EP0383988B1 (fr) 1989-02-20 1989-03-20 Passage à haut voltage pour appareils électriques réfrigérés à l'huile

Country Status (4)

Country Link
EP (1) EP0383988B1 (fr)
JP (1) JP2805690B2 (fr)
AT (1) ATE93081T1 (fr)
DE (1) DE58905274D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19824606C2 (de) * 1998-06-02 2001-02-08 Siemens Ag Vorrichtung zur Begrenzung von Überspannungen für Transformatoren
EP2991095A1 (fr) 2014-08-25 2016-03-02 Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. Ensemble de traversée haute tension, appareil de diffraction d'électrons et procédé de manipulation d'électrode dans un environnement sous vide

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101373659B (zh) * 2007-08-20 2012-08-22 特变电工股份有限公司 一种电抗器线圈的出线装置及含有该出线装置的铁心电抗器
EP2442321B1 (fr) * 2010-10-15 2012-12-05 ABB Technology AG Douille de traversée pour lignes de haute tension dans des transformateurs d'huile
EP2924698B1 (fr) * 2014-03-27 2018-11-21 ABB Schweiz AG Passage huile-huile et transformateur à huile
EP3093938B1 (fr) * 2015-05-12 2021-07-14 Siemens Energy Global GmbH & Co. KG Système d'exécution haute tension
CN105845332B (zh) * 2016-04-28 2017-10-27 绵阳启明星电力设备有限公司 油浸式变压器引线固定装置及其引线的固定方法
EP3618086B1 (fr) 2018-08-30 2021-04-28 ABB Power Grids Switzerland AG Écran pour un terminal d'un dispositif électrique à haute tension et son procédé de fonctionnement

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL161291C (nl) * 1975-01-17 1980-01-15 Smit Nijmegen Bv Transformator, voorzien van een vat met een losmaakbaar daaraan bevestigde doorvoerisolator met aansluit- geleider.
DE2842341C2 (de) * 1978-09-28 1983-01-20 Transformatoren Union Ag, 7000 Stuttgart Dämpfungsglied zum Einbau in Hochspannungskabelnetze
DD211665A1 (de) * 1982-11-17 1984-07-18 Transform Roentgen Matern Veb Fluessigkeitsgekuehlte hochstromdurchfuehrungsanordnung
DE3563575D1 (en) * 1984-05-04 1988-08-04 Siemens Ag High-tension transformer winding with regulated voltage distribution
DE3540637A1 (de) * 1985-11-15 1987-05-21 Transformatoren Union Ag Transformator mit sicherungseinrichtung
DE3543584A1 (de) * 1985-12-10 1987-06-11 Volta Werke Electricitaet Transformator mit sicherungseinrichtung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19824606C2 (de) * 1998-06-02 2001-02-08 Siemens Ag Vorrichtung zur Begrenzung von Überspannungen für Transformatoren
EP2991095A1 (fr) 2014-08-25 2016-03-02 Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. Ensemble de traversée haute tension, appareil de diffraction d'électrons et procédé de manipulation d'électrode dans un environnement sous vide

Also Published As

Publication number Publication date
ATE93081T1 (de) 1993-08-15
JP2805690B2 (ja) 1998-09-30
JPH02262312A (ja) 1990-10-25
DE58905274D1 (de) 1993-09-16
EP0383988A1 (fr) 1990-08-29

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