EP2351056B1 - Dispositif de barrières pour passage pour câbles - Google Patents

Dispositif de barrières pour passage pour câbles Download PDF

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Publication number
EP2351056B1
EP2351056B1 EP08875066.6A EP08875066A EP2351056B1 EP 2351056 B1 EP2351056 B1 EP 2351056B1 EP 08875066 A EP08875066 A EP 08875066A EP 2351056 B1 EP2351056 B1 EP 2351056B1
Authority
EP
European Patent Office
Prior art keywords
barrier
transformer
induction coil
coil according
cable bushing
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
EP08875066.6A
Other languages
German (de)
English (en)
Other versions
EP2351056A1 (fr
Inventor
Ronny Fritsche
Peter Heinzig
Jens Hoppe
Dietmar Jahnel
Johann Schlager
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
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2351056A1 publication Critical patent/EP2351056A1/fr
Application granted granted Critical
Publication of EP2351056B1 publication Critical patent/EP2351056B1/fr
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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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
    • 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
    • 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
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens

Definitions

  • the invention relates to a transformer or a choke coil with a line leadthrough arranged thereon as a lead-out and a barrier arrangement for the line leadthrough with adjacent barriers which are arranged at predeterminable distances from one another.
  • Such a transformer is from the DE 1 282 170 A already known.
  • the transformer described there has a tank filled with a transformer oil, in which an upper and lower voltage are arranged concentrically to each other.
  • the high-voltage winding is connected to a conductor pin of a bushing via a diversion.
  • the rejection consists of two parts, so that the bushing can also be mounted on the transformer on site and the bushing and transformer can be transported independently.
  • the removable intermediate piece of the reject line is equipped with shielding electrodes at both ends in order to avoid high electrical field strengths in these areas.
  • isolating barriers made of pressboard are provided, which define oil channels or oil paths between them, the isolating barriers being formed in the shape of a cylinder jacket.
  • a transformer which has a lead-out with which the winding can be connected to a high-voltage bushing.
  • the diversion has a cable entry and an electrode bent over at its free end, which is provided with paper insulation on the outside.
  • plug-in groups of barriers which can be pushed into one another and which define oil passages between them which have different spacings are disclosed. Almost all barriers have a cylindrical jacket shape and extend parallel to one another. Only in the upper end of the curved tube electrode are two barrier elements in this area complimenting the shape of the electrode end.
  • a transformer with a diversion and a barrier system is also disclosed.
  • Electrical systems especially transformers and choke coils, must have a high dielectric strength when used in high-voltage networks.
  • adequate electrical insulation with high dielectric strength in the so-called rejection is essential as a direct link between the electrical system and the high-voltage network.
  • HVDC high-voltage direct current
  • Barrier systems are conventionally used for this purpose, which are arranged around the line in the area of the outlet of the electrical system, a cooling medium, in particular a transformer oil, circulating within the barrier system for electrical insulation and cooling.
  • the cable duct as part of the electrical system is opposite a correspondingly arranged shielding electrode, which is integrated in the barrier system, is electrically shielded from one another.
  • the DE 10 2005 021 255 B4 a barrier system for a cable bushing of an electrical system in which the individual barriers can be plugged into one another in the form of plug-in elements.
  • This connection system is preferably located in a grounded dome, which is attached to the cover or to a side wall of the electrical system, in particular the transformer or reactor. Furthermore, the shielding electrode has paper insulation which ensures appropriate electrical shielding.
  • An exact position of the barriers must be ensured within the barrier system, with 15 to 25 barriers in some cases forming a corresponding barrier system.
  • the length of the barriers can be up to 3,000mm with a diameter of up to 1,500mm.
  • the thickness of the barriers is between 3mm and 5mm.
  • the oil field strengths are increasing with little changed arrangements of the cable bushings and the barrier system.
  • the oil gaps especially between the cable duct and the barriers and the shield electrode, must be reduced further and further.
  • the object of the present invention is therefore to provide a transformer or a choke coil of the type mentioned at the outset, which has an increased dielectric strength between the line bushing and the barrier arrangement.
  • a barrier arrangement according to the features of patent claim 1. According to the invention, provision is made between the barrier arrangement and the line leadthrough at least one barrier element is arranged to form an additional radial oil path.
  • an additional radial oil path is understood to mean a radial circulation system formed by at least one almost rotationally symmetrical barrier element, the oil being able to circulate in the radial and axial direction as a cooling and insulation medium within the additional radial oil path.
  • barriers are one-piece segments which can also be connected to one another and, if appropriate, can also be pushed into one another, and thus are a barrier system, such as in FIG DE 10 2005 021 255 B4 revealed, form.
  • the subdivision of radial oil paths between the line bushing and the electrode or the barrier arrangement - with an equally reliable design - increases the permissible field strengths of the circulating oil.
  • the line bushing can form a wall of the additional radial oil path. This enables use in particular for high operating voltages of more than 500 kV without having to completely redesign the previously known construction of the current diversions.
  • barrier elements form additional radial oil paths.
  • An increase in the permissible field strengths within the circulating oil between the electrode and the line lead-through can thus be ensured, in particular in the area of the corresponding and offset electrode for line lead-through.
  • the additional oil routes have a smaller distance than the oil routes of the barriers.
  • the barrier element advantageously comprises pressboard.
  • a plurality of barrier elements are advantageously arranged at almost constant intervals for the passage of the lines and / or relative to one another.
  • the distances between the additional radial oil paths can vary, in particular a smaller distance in the lower area of the barrier elements is advantageous compared to the distance in the upper area, since this allows the permissible field strengths to be increased in the lower area.
  • the line bushing is shaped as a funnel or cone, which can additionally be formed at the lower end by a cylindrical end.
  • the shape of the barrier elements can be adapted to the respective electrical or structural conditions as a whole or with regard to individual barrier elements.
  • an axial extension of the barrier elements beyond the upper part of the electrode is advantageous with a direct voltage applied to the electrode.
  • the barrier element can advantageously be fastened to the outer barrier arrangement or to the line bushing and is radially spaced from the electrode with a spacer.
  • the cable bushing is used in particular as a diversion on a transformer and / or on a choke coil.
  • the barrier arrangement is advantageously designed as a test barrier arrangement. These test barrier arrangements differ only in the lower region of the electrode arrangement from the arrangement used in a transformer or in a choke coil and can be used for high-voltage tests on cable bushings.
  • the Fig. 1 shows a section of a rejection 1, the representation of Fig. 1 a sectional drawing through a rotationally symmetrical diversion 1 and with respect to the axial axis of rotation 6 only the right part as a portion of the diversion 1 in the Fig. 1 is shown.
  • the barrier arrangement 2 is arranged relative to the line bushing 3 of the transformer (not shown).
  • the rotationally symmetrical barrier arrangement 2 comprises the Fig. 1 three barriers 7a, 7b, 7c, which are arranged relative to the line bushing 3.
  • a paper-insulated electrode 5 is part of the electrical shielding of the lead-out 1. Between the barrier arrangement 2 and the cable bushing 3 is in the example shown Fig.
  • the 1 integrates a barrier element 4a, which forms an additional radial oil path 8a, which is smaller than the conventional oil path, within the discharge line 1, so that the permissible field strengths within the circulating oil can be increased.
  • the additional radial oil path 8a is formed by the barrier element 4a and the line bushing 3.
  • FIG Fig. 2 A partial section of a discharge line 1 (not shown) as a sectional drawing with two rotationally symmetrical barrier elements 4a, 4b to form two additional radial oil paths 8a, 8b between the line leadthrough 3 and the electrode 5 is shown in FIG Fig. 2 shown.
  • the representation of the Fig. 2 is a sectional drawing through a rotationally symmetrical diversion 1 with respect to the axial axis of rotation 6 and shows only a portion of the diversion 1.
  • the first additional radial oil path 8a is formed by the arrangement of the first barrier element 4a relative to the line bushing 3.
  • the second additional radial oil path 8b is created by the almost constant distance A between the first and second barrier elements 4a, 4b.
  • Fig. 3 is a partial section of a diversion 1 (not shown) as a sectional drawing with three rotationally symmetrical barrier elements 4a, 4b, 4c to form additional radial oil paths 8a, 8b, 8c between the line bushing 3 and the electrode 5.
  • the additional radial oil paths 8a, 8b, 8c have due to the different shapes of the barrier elements 4a, 4b, 4c and their relative arrangement to one another have different shapes and diameters.
  • the third additional radial oil path 8c has a smaller diameter in the lower part than in the upper part of the barrier elements 4a, 4b, 4c.
  • the barrier elements 4a, 4b, 4c have an angled shape, which is configured in the upper region parallel to the shape of the line bushing 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Gas-Insulated Switchgears (AREA)

Claims (12)

  1. Transformateur ou bobine de self ayant une traversée (3) de ligne, qui y est montée en ligne (1) sortante, et un agencement de barrières pour la traversée (3) de ligne, ayant des barrières (7a, 7b, 7c), qui sont disposées les unes à côté des autres et qui sont disposées à des distances pouvant être données à l'avance entre elles,
    caractérisé en ce que
    entre l'agencement (2) de barrières et la traversée (3) de ligne est disposé un élément (4a, 4b, 4c) de barrière, qui constitue un parcours (8a, 8b, 8c) d'huile supplémentaire entre lui et la traversée de ligne, l'élément (4a, 4b, 4c) de barrière s'étendant, au moins par endroit, parallèlement à la traversée (3) de ligne.
  2. Transformateur ou bobine de self suivant la revendication 1,
    caractérisé en ce que
    le parcours (8a, 8b, 8c) d'huile supplémentaire est plus petit que le parcours d'huile entre les barrières (7a, 7b, 7c).
  3. Transformateur ou bobine de self suivant l'une des revendications 1 ou 2,
    caractérisé en ce qu'
    il est prévu d'autres éléments (4b, 4c) de barrière par rapport au premier élément (4a) de barrière et ils constituent entre eux et le premier élément ou un autre élément (4b, 4c) de barrière, respectivement, d'autres parcours (8a, 8b, 8c) d'huile radiaux supplémentaires.
  4. Transformateur ou bobine de self suivant la revendication 3,
    caractérisé en ce que
    les éléments (4a, 4b, 4c) de barrière forment des parcours (8a, 8b, 8c) d'huile supplémentaires, qui atteignent axialement une électrode (5) et assurent ainsi, au moins en partie, un chevauchement axial des parcours (8a, 8b, 8c) d'huile radiaux supplémentaires entre l'agencement (2) de barrières et l'électrode (5) ainsi que la traversée (3) de ligne.
  5. Transformateur ou bobine de self suivant l'une des revendications 3 ou 4,
    caractérisé en ce que
    les éléments (4a, 4b, 4c) de barrière sont constitués sous la forme d'un segment et peuvent être immobilisés sur la traversée (3) de ligne et/ou les barrières (7a, 7b, 7c).
  6. Transformateur ou bobine de self suivant l'une des revendications 1 à 5,
    caractérisé en ce que
    l'élément (4a, 4b, 4c) de barrière comprend du carton comprimé.
  7. Transformateur ou bobine de self suivant l'une des revendications 1 à 6,
    caractérisé en ce que les éléments (4a, 4b, 4c) de barrière sont disposés les uns par rapport aux autres, de manière à ce que, dans la partie inférieure des éléments (4a, 4b, 4c) de barrière, les parcours (8a, 8b, 8c) d'huile radiaux supplémentaires aient une distance plus petite que dans la partie supérieure des éléments (4a, 4b, 4c) de barrière.
  8. Transformateur ou bobine de self suivant l'une des revendications 1 à 6,
    caractérisé en ce que
    les éléments (4a, 4b, 4c) de barrière sont disposés les uns par rapport aux autres, de manière à ce que les parcours (8a, 8b, 8c) d'huile radiaux supplémentaires soient à peu près à la même distance.
  9. Transformateur ou bobine de self suivant l'une des revendications 1 à 8,
    caractérisé en ce que
    la traversée (3) de ligne est constituée sous la forme d'un entonnoir ou d'un cône à garniture cylindrique.
  10. Transformateur ou bobine de self suivant l'une des revendications 1 à 9,
    caractérisé en ce que
    l'élément (4a, 4b, 4c) de barrière est fixé à l'agencement (2) de barrières se trouvant à l'extérieur ou à la traversée (3) de ligne au moyen d'éléments de liaison.
  11. Agencement (2) de barrière suivant l'une des revendications 1 à 10,
    caractérisé en ce que
    l'agencement (2) de barrières est un agencement de barrières de contrôle pour contrôler la traversée.
  12. Transformateur ou bobine de self suivant l'une des revendications 1 à 11,
    caractérisé en ce que
    la traversée (3) de ligne est disposée sur un caisson de câbles et/ou un conduit de liaison empli de liquide isolant.
EP08875066.6A 2008-11-28 2008-11-28 Dispositif de barrières pour passage pour câbles Active EP2351056B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/010285 WO2010060450A1 (fr) 2008-11-28 2008-11-28 Dispositif de barrières pour passage pour câbles

Publications (2)

Publication Number Publication Date
EP2351056A1 EP2351056A1 (fr) 2011-08-03
EP2351056B1 true EP2351056B1 (fr) 2019-12-25

Family

ID=40791403

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08875066.6A Active EP2351056B1 (fr) 2008-11-28 2008-11-28 Dispositif de barrières pour passage pour câbles

Country Status (4)

Country Link
EP (1) EP2351056B1 (fr)
CN (1) CN102227785B (fr)
BR (1) BRPI0823215A2 (fr)
WO (1) WO2010060450A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2620958B1 (fr) * 2012-01-26 2014-11-26 Siemens Aktiengesellschaft Dispositif de blindage pour un élément de liaison à conduction électrique
EP2942795B1 (fr) * 2014-05-07 2017-03-01 ABB Schweiz AG Dispositif à induction électromagnétique haute tension

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1282170B (de) * 1964-08-25 1968-11-07 Licentia Gmbh Abnehmbare Durchfuehrung fuer Hoechstspannungs-Transformatoren
EP0285895B1 (fr) * 1987-04-09 1992-03-11 Siemens Aktiengesellschaft Dispositif d'isolation haute tension pour self et transformateurs, en particulier destiné à la transmission de courant continu à haute tension
DE102005021255B4 (de) * 2005-05-02 2007-08-16 Siemens Ag Barrierensystem für die Leitungsdurchführung einer elektrischen Anlage

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
CN102227785A (zh) 2011-10-26
BRPI0823215A2 (pt) 2015-06-30
EP2351056A1 (fr) 2011-08-03
WO2010060450A1 (fr) 2010-06-03
CN102227785B (zh) 2013-06-19

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