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EP2927923B1 - Interrupteur de charge de transformateur à sec - Google Patents

Interrupteur de charge de transformateur à sec Download PDF

Info

Publication number
EP2927923B1
EP2927923B1 EP14001201.4A EP14001201A EP2927923B1 EP 2927923 B1 EP2927923 B1 EP 2927923B1 EP 14001201 A EP14001201 A EP 14001201A EP 2927923 B1 EP2927923 B1 EP 2927923B1
Authority
EP
European Patent Office
Prior art keywords
load switch
dry transformer
transformer load
radially
dry
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.)
Active
Application number
EP14001201.4A
Other languages
German (de)
English (en)
Other versions
EP2927923A1 (fr
Inventor
Benjamin Weber
Jens Tepper
Martin Carlen
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.)
ABB Schweiz AG
Original Assignee
ABB Schweiz 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 ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to EP14001201.4A priority Critical patent/EP2927923B1/fr
Priority to PCT/EP2015/054335 priority patent/WO2015150005A1/fr
Priority to CN201580017665.6A priority patent/CN106463287B/zh
Publication of EP2927923A1 publication Critical patent/EP2927923A1/fr
Priority to US15/281,113 priority patent/US10134535B2/en
Application granted granted Critical
Publication of EP2927923B1 publication Critical patent/EP2927923B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H01H9/0016—Contact arrangements for tap changers
    • 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
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H01F29/025—Constructional details of transformers or reactors with tapping on coil or windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2201/00—Contacts
    • H01H2201/01—Protective enclosure

Definitions

  • the invention relates to a dry-type transformer circuit breaker, comprising a hollow insulating cylinder extending longitudinally about a virtual central axis with a plurality of arranged along the inner circumference terminal contacts, and a radially aligned inside the insulating hollow cylinder about the central axis radially aligned main contact which selectively by means of a corresponding rotational movement with its radially outer end is connectable to one of the terminal contacts.
  • transformers are used in power distribution networks to couple power supplies of different voltage levels together.
  • higher voltage levels such as 110kV / 380kV oil transformers are usually used, at underlying voltage levels, dry transformers or gas-filled transformers are common, for example, 30kV, 72.5kV and some even 110kV.
  • Oil transformers often have so-called load switch, by means of which can be changed under load current between different taps of the transformer winding, so that the voltage in the network can be controlled by adjusting the transmission ratio of the transformer within certain limits.
  • a load switch typically has a plurality of wires arranged along a track Connection contacts, which are connected to different taps of a transformer winding.
  • a main contact is mechanically movable along the track and can thereby be selectively connected to one of the taps.
  • the taps are arranged along a circular path, so that a contacting of the desired tap takes place by a rotational movement of the main contact.
  • circuit breakers are located in an oil-filled area of the transformer tank, which, however, is separated from the area in which the transformer is located for reasons of contamination. Due to the arrangement of such a circuit breaker in the isolation medium oil, this can be designed significantly smaller than in an arrangement in air.
  • the patent document DE 24 49 004 A1 discloses a selector, as they are used in tap changers for tuning transformers as fine selectors and turners of long lengths and high rated currents, consisting of an insulating column with fixed slip rings and an outer cage of Isolierstoffstäben on which the mating contacts are arranged and a rotatable between them on a circular path slatted frame Isolierstoffstäben carrying movable, spring-mounted running contacts, which connect the slip rings with the mating contacts.
  • the patent document DE 16 38 570 A1 discloses a single- or multi-phase switchable under load switch for a control transformer, which switch with arranged in a cylindrical surface fixed contacts and within this cylindrical surface, cooperating with these contacts, by a provided around the axis of this cylindrical surface rotatable carrier made of insulating material, movable switch contacts.
  • the patent document DE 30 00 733 A1 discloses a tap changer for transformers with selector contacts provided respectively for even and odd winding taps, which are connected via resistors and vacuum switches with electrical conductors to be connected to the respective winding.
  • a dry-type transformer circuit breaker of the type mentioned in the introduction is characterized in that in a hollow-cylindrical space determined by radially inner and outer ends of the main contact is provided around the central axis together with the main contact to this rotatable barrier screen in the form of a hollow cylindrical screen element, which is provided in the region of the main contact with a recess.
  • the basic idea of the invention is to provide a barrier screen rotatable together with the main contact so as to improve the electrical strength.
  • the space between the connection contacts lying radially on the outside of the insulating hollow cylinder and the main contact is the region with the greatest isolation.
  • the arrangement of a fixed barrier screen is not possible because this hollow cylindrical space around the central axis for an all-round movement of the main contact must be available.
  • this hollow-cylindrical space around the central axis can be used both for a movement of the main contact and for the arrangement of a barrier screen.
  • the insulation resistance of a dry-type transformer circuit breaker according to the invention is thereby increased in an advantageous manner.
  • the barrier screen comprises a hollow-cylinder-shaped or hollow-cylinder segment-shaped shielding element.
  • a hollow cylinder-like screen element is particularly suitable to be part of a barrier screen in also hollow cylindrical space around the central axis.
  • the barrier screen comprises at least two hollow cylindrical shielding elements arranged radially one above the other.
  • At least one hollow cylindrical screen element is at least a radially aligned inner plate is provided, which preferably extends along the central axis.
  • the at least one radially aligned inner plate protrudes from the hollow cylindrical space about the axis of rotation, but is made of an elastic material such as silicone rubber.
  • the at least one radially aligned inner plate also projects out of the hollow cylindrical space about the axis of rotation, but means are provided for displacing the inner plate radially inward at least for the duration of a rotational movement of the barrier screen.
  • a radially oriented outer disk is provided on the inner circumference of the hollow insulating cylinder, which protrudes into its inner space.
  • the at least one radially oriented outer plate is made of an elastic material.
  • At least one lamella is also provided on the radially outer surface of the insulating hollow cylinder between protruding connecting contacts, the purpose of which corresponds to that of the aforementioned inwardly projecting outer lamella.
  • corresponding lamellae are provided both on the inside and on the outside of the insulating hollow cylinder.
  • At least one terminal contact projecting radially into the interior of the hollow insulating cylinder is surrounded by a hollow cylindrical barrier.
  • the barrier screen is held by disk elements which are rotatable about the center axis and which are provided at the axial end regions of the hollow insulating cylinder.
  • disk elements which are rotatable about the center axis and which are provided at the axial end regions of the hollow insulating cylinder.
  • direct contact of the barrier screen with the main contact is to be avoided.
  • this can be achieved in particular for the isolation technology relevant area in the hollow cylindrical space around the central axis.
  • this is hermetically encapsulated and filled with an insulating gas.
  • An insulating gas such as SF6 advantageously increases the withstand voltage.
  • the object according to the invention is also achieved by a dry-type transformer comprising a transformer core with at least one winding and a load switch, wherein the load switch is a dry-type transformer circuit breaker according to the invention.
  • Fig. 1 shows an exemplary first dry-transformer load switch 10 in a sectional view.
  • a tube-like insulating hollow cylinder 14 of an insulating material for example of a glass fiber / epoxy resin composite material is arranged.
  • a plurality of terminal contacts 14, 16, 18 are guided in its interior in a common plane perpendicular to the central axis 12, in which they protrude.
  • a hollow-cylindrical rotary body 27 with a main contact 22 radially outgoing from its outer surface is also rotatably arranged around the central axis 12.
  • the radially outer end 26 of the main contact 22 is selectively connectable to one of the connection contacts 14, 16, 18.
  • a hollow cylindrical space 28 is formed around the central axis 12, which sweeps over the main contact in a rotary motion.
  • Fig. 2 shows an exemplary second dry-transformer load switch 30 in a sectional view. This is similar to the previously in the Fig. 1 shown dry-type transformer load switch, however, in this example, a rotatable together with the main contact barrier screen with a hollow cylinder segment-shaped shield member 32 and associated radially aligned inner fins 34, 36 are shown. The electrical insulation capability of the dry-type transformer circuit breaker is thereby advantageously increased.
  • Fig. 3 shows an exemplary third dry-transformer load switch 40 in a sectional view.
  • the rotatable barrier screen two radially adjacent hollow cylinder segment-shaped shielding elements 42, 44, whereby the dielectric strength of the barrier screen is increased in an advantageous manner.
  • Fig. 4 shows an exemplary fourth dry-transformer load switch 50 in a sectional view.
  • radially aligned outer plates 52, 54, 56 are arranged on the inner circumference of the hollow insulating cylinder of the dry-type transformer, which protrude into the interior of the insulating hollow cylinder. Due to a successful rotational movement, which is indicated by the arrow with the reference numeral 58, the third outer fin 56 is just in a collision with the main contact. Since the outer plates are made of elastic silicone rubber in this case, a temporary deformation of the third outer plate 56 occurs due to the collision.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Gas-Insulated Switchgears (AREA)

Claims (12)

  1. Commutateur de charge pour transformateur à air sec (10, 30, 40, 50), comprenant
    * un cylindre creux d'isolation (14) qui s'étend le long d'un axe central virtuel (12) comprenant plusieurs contacts de raccordement (16, 18, 20) disposés le long de son pourtour intérieur, et aussi
    * un corps rotatif (27) cylindrique creux disposé à l'intérieur du cylindre creux d'isolation (14) et pouvant tourner autour de l'axe central (12), pourvu d'un contact principal (22) orienté dans le sens radial et s'écartant radialement de sa surface extérieure, lequel peut être relié électriquement à l'un des contacts de raccordement (16, 18, 20), au choix, par son extrémité extérieure radiale (26) au moyen d'un mouvement de rotation correspondant,
    caractérisé en ce
    que dans un espace cylindrique creux (28) défini par l'extrémité intérieure (24) et extérieure (26) radiale du contact principal (22) autour de l'axe central (12) se trouve un écran formant barrière ((32+34+36), (42+44)) sous la forme d'un élément de blindage cylindrique creux pouvant tourner autour de celui-ci conjointement avec le contact principal (22), lequel est pourvu d'une cavité dans la zone du contact principal.
  2. Commutateur de charge pour transformateur à air sec selon la revendication 1, caractérisé en ce que l'écran formant barrière ((32+34+36), (42+44)) comprend au moins deux éléments de blindage de forme cylindrique creuse disposés l'un au-dessus de l'autre dans le sens radial.
  3. Commutateur de charge pour transformateur à air sec selon la revendication 1 ou 2, caractérisé en ce qu'au moins une lamelle interne (34, 36) orientée dans le sens radial se trouve sur au moins un élément de blindage de forme cylindrique creuse.
  4. Commutateur de charge pour transformateur à air sec selon la revendication 3, caractérisé en ce que l'au moins une lamelle interne (34, 36) orientée dans le sens radial fait saillie hors de l'espace cylindrique creux (28) autour de l'axe de rotation (12) et est constituée d'un matériau élastique.
  5. Commutateur de charge pour transformateur à air sec selon la revendication 3, caractérisé en ce que l'au moins une lamelle interne (34, 36) orientée dans le sens radial fait saillie hors de l'espace cylindrique creux (28) autour de l'axe de rotation (12) et il existe des moyens pour déplacer la lamelle interne (34, 36) dans le sens radial vers l'intérieur au moins pendant la durée d'un mouvement de rotation de l'écran formant barrière.
  6. Commutateur de charge pour transformateur à air sec selon l'une des revendications précédentes, caractérisé en ce qu'il existe au moins une lamelle externe (52, 54, 56) orientée dans le sens radial sur le pourtour intérieur du cylindre creux d'isolation (14), laquelle fait saillie à l'intérieur de son espace intérieur.
  7. Commutateur de charge pour transformateur à air sec selon la revendication 6, caractérisé en ce que l'au moins une lamelle externe (52, 54, 56) orientée dans le sens radial est constituée d'un matériau élastique.
  8. Commutateur de charge pour transformateur à air sec selon l'une des revendications précédentes, caractérisé en ce qu'une lamelle est présente au moins sur la surface extérieure radiale du cylindre creux d'isolation (14) entre des contacts de raccordement (16, 18, 20) faisant saillie.
  9. Commutateur de charge pour transformateur à air sec selon l'une des revendications précédentes, caractérisé en ce qu'au moins un contact de raccordement (16, 18, 20) faisant saillie vers l'intérieur dans le sens radial dans l'espace intérieur du cylindre creux d'isolation (14) est entouré par une barrière cylindrique creuse.
  10. Commutateur de charge pour transformateur à air sec selon l'une des revendications précédentes, caractérisé en ce que l'écran formant barrière ((32+34+36), (42+44)) est maintenu par des éléments en disque pouvant tourner (12) autour de l'axe central, lesquels se trouvent aux extrémités axiales du cylindre creux d'isolation (14).
  11. Commutateur de charge pour transformateur à air sec selon l'une des revendications précédentes, caractérisé en ce que celui-ci est encapsulé hermétiquement et rempli d'un gaz isolant.
  12. Transformateur à air sec, comprenant un noyau de transformateur comportant au moins un enroulement et un commutateur de charge, caractérisé en ce que le commutateur de charge est un commutateur de charge pour transformateur à air sec (10, 30, 40, 50) selon l'une des revendications 1 à 11.
EP14001201.4A 2014-03-31 2014-03-31 Interrupteur de charge de transformateur à sec Active EP2927923B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP14001201.4A EP2927923B1 (fr) 2014-03-31 2014-03-31 Interrupteur de charge de transformateur à sec
PCT/EP2015/054335 WO2015150005A1 (fr) 2014-03-31 2015-03-03 Commutateur en charge de transformateur à sec
CN201580017665.6A CN106463287B (zh) 2014-03-31 2015-03-03 干式变压器负载开关
US15/281,113 US10134535B2 (en) 2014-03-31 2016-09-30 Dry transformer load switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14001201.4A EP2927923B1 (fr) 2014-03-31 2014-03-31 Interrupteur de charge de transformateur à sec

Publications (2)

Publication Number Publication Date
EP2927923A1 EP2927923A1 (fr) 2015-10-07
EP2927923B1 true EP2927923B1 (fr) 2017-01-04

Family

ID=50439113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14001201.4A Active EP2927923B1 (fr) 2014-03-31 2014-03-31 Interrupteur de charge de transformateur à sec

Country Status (4)

Country Link
US (1) US10134535B2 (fr)
EP (1) EP2927923B1 (fr)
CN (1) CN106463287B (fr)
WO (1) WO2015150005A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016203106A1 (de) * 2016-02-26 2017-08-31 Siemens Aktiengesellschaft Anordnung zur elektrostatischen Abschirmung einer elektrischen Anlage
DE102018203425A1 (de) * 2018-03-07 2019-09-12 Siemens Aktiengesellschaft Vorrichtung zum Abschirmen eines Leistungshalbleiters in einem mit einem Isolierfluid befüllten Kessel
EP3996124A1 (fr) * 2020-11-06 2022-05-11 ABB PG Power Grids Ltd Transformateur avec un interrupteur rotatif de coupure en charge

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL258282A (fr) * 1959-01-07
NL126950C (fr) * 1966-04-26
DE2449004A1 (de) * 1974-10-15 1976-04-22 Transformatoren Union Ag Waehler fuer stufenschalter
JPS5595308A (en) * 1979-01-12 1980-07-19 Fuji Electric Co Ltd On-load tap changer
DD208264A1 (de) * 1981-12-22 1984-03-28 Liebknecht Transformat Elektrische abschirmung fuer umsteller in transformatoren und drosselspulen
WO2011144253A2 (fr) * 2010-05-21 2011-11-24 Abb Research Ltd Appareil de terminaison de câble pour courant continu à haute tension
EP2637186B1 (fr) * 2012-03-07 2014-09-17 ABB Technology Ltd Robinet sélecteur et procédé d'assemblage d'un changeur de prises

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US20170018376A1 (en) 2017-01-19
US10134535B2 (en) 2018-11-20
EP2927923A1 (fr) 2015-10-07
CN106463287B (zh) 2018-12-07
WO2015150005A1 (fr) 2015-10-08
CN106463287A (zh) 2017-02-22

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