EP2661761B1 - Guide de conduites pour des transformateurs de transmission de courant continu haute tension et des bobines de réactance de transmission de courant continu haute tension - Google Patents

Guide de conduites pour des transformateurs de transmission de courant continu haute tension et des bobines de réactance de transmission de courant continu haute tension Download PDF

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Publication number
EP2661761B1
EP2661761B1 EP11810844.8A EP11810844A EP2661761B1 EP 2661761 B1 EP2661761 B1 EP 2661761B1 EP 11810844 A EP11810844 A EP 11810844A EP 2661761 B1 EP2661761 B1 EP 2661761B1
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EP
European Patent Office
Prior art keywords
hvdc
layer
electrode tube
specific resistivity
wiring arrangement
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.)
Not-in-force
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EP11810844.8A
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German (de)
English (en)
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EP2661761A1 (fr
Inventor
Beriz BAKIJA
Dieter Breitfelder
Thomas Hammer
Jens Hoppe
Karsten LOPPACH
Johann Schlager
Volkmar LÜTHEN
Frank Heinrichsdorff
Ursus KRÜGER
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Siemens AG
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Siemens AG
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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
    • H01F27/28—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
    • 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
    • H01B17/34—Insulators containing liquid, e.g. oil

Definitions

  • the invention relates to a wiring for the electrical connections (by electrical lines) of a HVDC transformer coil or a HVDC choke coil.
  • This has an electrode tube with a conductive surface and with an installation space for the line.
  • the installation space is the interior formed by the pipe.
  • the tube may preferably have a round cross section, but may also have other cross sections.
  • the wiring has a layer of a cellulosic material such. As paper or pressboard, which may be applied as a winding and enclosing the electrode tube full circumference.
  • the electrode tube itself is preferably made of copper.
  • a wiring of the type specified is, for example, the DE 10 2006 013 927 A1 and the abstract JP 59036909 refer to.
  • These cable guides are used to safely store and electrically isolate the electrical connection cables for HVDC transformer coils or HVDC choke coils and shield the resulting electric field in a suitable manner.
  • such cable guides not only consist of the coated electrode tube, but are surrounded by one or more solid barriers, preferably of pressboard. These form gaps between each other, which are filled by transformer oil. In this way, an insulating distance, over which the voltage drops.
  • the oxidizing agent ensures on the one hand for the polymerization of the pyrrole compounds, in addition to an increase in electrical conductivity.
  • the resistivity p of such impregnated cellulosic materials can thus be influenced by the concentration of pyrroles and the nature of the oxidizing agent.
  • nanocomposites can also be used as a field grading material when it comes to reducing peaks in the formation of electric fields, for example on the insulation of electrical conductors.
  • a material consisting of a polymer can be used for this purpose.
  • a filler is distributed whose particles are nanoparticles, so have an average diameter of at most 100 nm.
  • inter alia semiconducting materials can be used whose band gap lies in a range of 0 eV and 5 eV.
  • the electrical resistance of the nanocomposite can be adjusted.
  • a certain proportion of the volume Depending on the size of the nanoparticles, which is between 10 and 20% by volume, the specific resistance of the nanocomposite is noticeably reduced, whereby the electrical conductivity of the nanocomposite can be adjusted and adapted to the required conditions.
  • I can set a resistivity of the order of 10 12 ⁇ m. This results in a voltage drop across the nanocomposite, which results in a more uniform distribution of the potential and thus also grades the resulting electric field in a suitable manner. As a result, the resulting field peaks can be reduced, which advantageously increases the dielectric strength.
  • the field weakening effect of the nanocomposite here depends on the permittivity of the nanocomposite, the permittivity ⁇ being a measure of the permeability of a material for electric fields.
  • the permittivity is also referred to as the dielectric constant, the term "permittivity" being used below.
  • the higher the relative permittivity the greater the field weakening effect of the substance used in relation to the vacuum. In the following, only the permittivity figures of the substances used are dealt with.
  • the WO 2006/122736 A1 also describes a system of cellulosic fibers and nanotubes, preferably carbon nanotubes (hereinafter CNT), in which specific resistances of about 6 to 75 ⁇ m can be set.
  • CNT carbon nanotubes
  • These nanocomposites are to be used, for example, as electrical resistance heating, wherein the conductivity is designed with regard to an ability of the material of the conversion of electrical energy into heat. For this purpose, a sufficient degree of coverage of cellulose fibers with CNT is required.
  • the WO 2006/131011 A1 describes a socket, which may consist inter alia of an impregnated paper wrap.
  • BN is also mentioned among other materials. This can also be used in doped form.
  • the particles should be used with a concentration in the cellulose material below the percolation threshold, so that there is no electrical contact between the particles with each other. For this reason, the specific electrical resistance of the nanocomposite remains essentially unaffected.
  • a nanocomposite comprising semiconducting or nonconducting nanoparticles dispersed in a cellulosic material such as pressboard is known, which can be used as a field grading material in transformers. At least part of the nanoparticles distributed in the cellulosic material have an enclosure of an electrically conductive polymer.
  • a cellulosic material for example, a paper, paperboard or pressboard can be used.
  • the cellulosic material has a construction of cellulosic fibers which in their entirety make up the bandage forming the cellulosic material.
  • Si, SiC, ZnO, BN, GaN, AlN or C, especially boron nitride nanotubes (hereinafter referred to as BNNT) can be used.
  • electrically conductive polymers in the DE 10 2007 018 540 A1 mentioned polymers find use.
  • electrically conductive polymers include polypyrroles, polyaniline, polythiophenes, polyparaphenylenes, polyparaphenylenevinylenes and derivatives of these polymers mentioned.
  • a specific example of such polymers is PEDOT, which is also sold under the trade name Baytron by Bayer AG.
  • PEDOT is also referred to by its systematic name as poly (3,4-ethylene dioxythiophene).
  • the impregnation consists of a polymer which is crosslinked from a negative ionomer, in particular PSS, and a positively charged ionomer.
  • positively charged ionomers preferably PEDOT or PANI can be used.
  • PEDOT refers to the already mentioned poly (3,4-ethylene-dioxydthiophene).
  • PANI is polyaniline and PSS is polystyrene sulfonate.
  • the use of negatively charged and positively charged ionomers advantageously makes it particularly easy to produce the cellulosic material.
  • the ionomers can be easily dissolved in water and thus fed to the process of making the cellulosic material, which is also water-based. By crosslinking the ionomers following preparation of the cellulosic material, the resistivity of the cellulosic material can be lowered.
  • the ionomers polymerize and form in the cellulosic material an electrically conductive network, which is responsible for the reduction of the specific resistance.
  • the ionomers mentioned can also be used to coat the abovementioned semiconducting or non-conducting nanoparticles.
  • the nanocomposite can also be impregnated with semiconducting nanoparticles which are at least partially made of BNNT and distributed in the cellulose or a polymer.
  • semiconducting nanoparticles which are at least partially made of BNNT and distributed in the cellulose or a polymer.
  • a doping of this BNNT with suitable dopants or a coating with metals or doped semiconductors is provided on the BNNT.
  • the concentration of the BNNT can be chosen such that the nanocomposite has a specific conductivity p of the order of 10 12 ⁇ m. According to this variant, no conductive polymers are used as sheath of the BNNT.
  • Doping can be achieved by modifying the BNNT by adding suitable dopants such that the dopant atoms form electronic states that will make the BNNT a p-conductor (ie, electronic states that capture electrons from the valence band edge ) or to an n-conductor (ie, reaching electronic states that emit electrons by thermal excitation across the conduction band edge).
  • a dopant for a p-doping for example Be comes into question, as a dopant for n-doping Si comes into question.
  • Such doping of the BNNT can be done in situ, during the growth of the BNNT z. B. from the gas or liquid phase, the dopant atoms are incorporated.
  • the doping in one further step after growth of the BNNT, the dopants typically being taken up by the BNNT under the influence of a heat treatment.
  • the resistivity can be lowered to values typical for doped semiconductors between 0.1 and 1000 ⁇ cm.
  • the nanocomposite made of cellulosic material can also be impregnated with semiconducting nanoparticles, wherein doping of these nanoparticles with dopants is also provided to increase the effective conductivity of at least part of the nanoparticles distributed in the insulating material.
  • the use of semiconducting nanoparticles, in particular BNNT has the advantage that low filler contents of at most 5% by volume, preferably even at most 2% by volume, in the insulating material are sufficient to cause percolation of the nanoparticles and thus to increase the electrical conductivity of the nanocomposite.
  • the pressboard barriers of HVDC systems can be provided with a stepped increased electrical conductivity.
  • the specific resistance of the press chip with the highest electrical conductivity should be arranged at the end of the insulating section, at which the field lines have the smaller radius of curvature.
  • the inner end of high-voltage bushings in the housing of HVDC systems can be isolated.
  • the object of the invention is a wiring for electrical connections of a HVDC transformer coil or to specify a HVDC choke, which open a comparatively large structural scope for the design and as a result, in particular, can be performed as space-saving.
  • the layer is designed around the electrode tube as a composite, consisting of a treated cellulosic material.
  • the cellulosic material is treated according to the invention by distributing in this particle a lower specific resistance in a concentration above the percolation threshold compared to the specific resistance ⁇ p of the treated cellulosic material.
  • a coherent network of a conductive polymer with a lower resistivity than the specific resistance ⁇ p of the untreated cellulose material pervades the composite.
  • the addition of particles or the provision of a network of a conductive polymer in a cellulose material in the manner indicated has the effect of reducing the specific resistance of the composite thus produced in comparison to untreated cellulose material.
  • the specific resistance of the composite is matched to that of transformer oil, so that a load on the insulating section can be reduced evenly when subjected to a DC voltage across the individual elements of the insulating section.
  • the voltage drop across the cellulosic material is lower, so that the transformer oil is loaded to a greater extent.
  • a reserve is used according to the invention, which is available anyway. This is advantageous, the constructive scope for the design of cellulose barriers in particular the layer on the electrode tube, but also advantageous for the design of the electrode tube surrounding solid particles.
  • HVDC components in general are understood to mean those components which are used for the transmission of high-voltage direct currents and contain current-carrying elements (HVDC stands for high-voltage direct current transmission).
  • HVDC stands for high-voltage direct current transmission
  • transformers or chokes are required as HVDC components.
  • cable routing for the electrical connection of various HVDC components are required.
  • Further HVDC components are disconnection points in such cable guides or bushings through housing components in which other HVDC components are housed.
  • leading to high-voltage direct currents occur, for example, in transformer and choke coils and alternating currents.
  • the HVDC components in the context of this invention should be suitable for transmitting high-voltage direct currents of at least 100 KV, preferably for the transmission of high-voltage direct currents of more than 500 KV.
  • the described, for the invention essential effect of a relief of the cellulosic material by the voltage drop takes place to a greater extent on the transformer oil, can be used advantageously good if the specific resistance ⁇ comp of the composite is not more than 5 times 10 13 ⁇ m.
  • a specific resistance ⁇ comp of the composite which is 1 to 20 times the specific resistance ⁇ o of the transformer oil. It can be provided particularly advantageously that the specific resistance ⁇ comp of the composite corresponds, on the order of magnitude, to the specific resistance of transformer oil.
  • order of magnitude it is meant that the specific resistance ⁇ comp of the composite differs by at most an order of magnitude from that of the transformer oil (ie at most by a factor of 10).
  • the specific resistances ⁇ o , ⁇ p and ⁇ comp in the context of this invention should each be measured at room temperatures and a prevailing reference field strength of 1 kV / mm. Under these conditions, the resistivity ⁇ o is between 10 12 and 10 13 ⁇ m. It should be noted, however, that the specific resistance ⁇ o of transformer oil is rather reduced in the case of an inventive heavier load due to the voltage drop across the transformer oil. In the embodiments described in more detail below, it is therefore assumed that a specific resistance ⁇ o in the transformer oil of 10 12 ⁇ m.
  • the electrode tube is designed such that it adjoins with its one end directly to the HVDC transformer coil or HVDC choke coil after assembly.
  • a tolerance compensation is realized in that a distance between the end of the electrode tube and the HVDC transformer coil or HVDC choke coil remains, which can vary in width within certain limits.
  • This advantageously results in a comparatively simple structural design for the cable routing. It is advantageous if this is created as a prefabricated component. This is advantageous for a winding arrangement which is mounted as a leg set. (A thigh set consists of one or more coils which is assembled with almost all screen and spacers - preferably from press chip as a unit).
  • a wiring system as Component consists of a pipe system which is prefabricated as a unit with a layer of cellulosic material and possibly one or more solid barriers, which are preferably also made of a cellulosic material.
  • This wiring system as a component can be advantageously carried out space-saving, if this is provided with electrode tubes having the layer according to the invention and the solid barriers according to the invention.
  • the wiring in particulate construction meaning is to grow the wiring part by part of the winding or the thigh set.
  • This embodiment is advantageous to use in a winding assembly (in this case, the winding coils and the screening and distancing elements are attached individually to the leg core).
  • the particulate design is also applicable to above-mentioned thigh assembly.
  • the electrode tube may be dimensioned in length such that it can be arranged with its ends between two adjacent HVDC transformer coils or HVDC choke coils.
  • This has the advantage that a tolerance compensation arises both for one coil and for the other coil, which is formed by the respective gap between the ends of the electrode tube and the adjacent coil.
  • the arrangement of the electrode tube between the coils is advantageously simplified according to the invention, since this can be carried out in a space-saving manner by using the cellulose material according to the invention and therefore fits into the gap remaining between the coils.
  • the electrode tube is curved, wherein the curvature in the installed state should lie in a plane perpendicular to the axis of symmetry of the HVDC transformer coil or HVDC choke coil.
  • an installation position is formed by a structural design of the interfaces of the wiring to the coils so that the wiring can be approximated from the side of the two coils.
  • the installation space for the wiring from the space between the two coils is displaced outwards, so that a larger installation space is available.
  • a particulate design also called component design
  • the specific resistance of adjacent layer layers forming the layer is graduated, the layer layer or the layer layers having the lowest specific resistance being adjacent to the electrode tube.
  • the layer is thus made up of several layer layers which differ in their electrical properties. It is hereby possible to change the resistivity in the layer stepwise, it being advantageous if the specific resistance in the layer to the electrode tube decreases. As a result, the effect of a field grading in the area near the passage element can be used more.
  • the resistivity of the layer is lowered only to the surface of the layer which forms an interface to the surrounding transformer oil in a range greater than or equal to the resistivity of the transformer oil, while the resistivity is further lowered in the interior of the layer toward the electrode tube.
  • load peaks in the wrapping material can be reduced near the electrode tube.
  • the layer consists of a paper winding with several winding layers, wherein the paper winding is wound around the electrode tube.
  • This is wrapped around the electrode tube by rotating it around its central axis.
  • a winding layer is dependent on the paper thickness, while the already mentioned layer layer is dependent on which region should be equipped with which specific resistance.
  • layers of different resistivity can be made by using different papers.
  • a winding layer is generally much thinner (because of the paper thickness) as a layer layer. A layer layer is thus produced by winding a plurality of winding layers.
  • the thickness s of the layer is reduced in comparison with the required thickness when using the relevant untreated cellulose material instead of the composite. This is an advantageous possibility of how the structural freedom of design, which results from the reduction of the specific resistance of the envelope, can be exploited. Due to a smaller thickness of the envelope, the space required for the line feedthrough is advantageously reduced. Due to the reduced specific resistance, the dielectric strength of the layer remains the same.
  • the solid barriers to the electrode tube to form gaps (ie gaps) are provided for transformer oil between the solid barriers with each other and to the layer of the electrode tube. This results in an alternating sequence of transformer oil and cellulosic material. This sequence gives the Isolierumble. It is particularly advantageous if the solids barriers also consist of the treated cellulosic material, ie. H. are reduced in their specific resistance. As a result, the design freedom of design can advantageously be extended even further, for example by providing solid barriers having a reduced wall thickness.
  • a wall thickness of 1 mm should not be undercut, since this is a constructive design limit. Namely, the solid barriers must have sufficient mechanical stability.
  • wall thicknesses of 1 to 3 mm can be provided.
  • the solid barriers are provided with graded electrical resistance, as has already been described for the layer.
  • the specific resistance increases with increasing distance of the solids barrier to the passage element.
  • the graduated adjustment of different resistances of solid barriers and layer layers in the layer has the advantage that the specific resistance can be adapted to the respective locally present field strength of the electric field surrounding the transmission.
  • An electrical insulating section 18 according to FIG. 1 generally consists of several layers of cellulosic material 19, between which oil layers 20 are located. Also, the cellulosic material 19 is impregnated with oil, which in FIG. 1 not shown in detail. This is in FIG. 1 within the cellulosic material to recognize an impregnation 11.
  • the according to FIG. 1 shown insulation surrounds, for example, an electrode tube 21 a wiring in a transformer.
  • the electrical insulation of a transformer must prevent electrical breakdowns in the event of an AC voltage being applied.
  • the isolation behavior of the insulation depends on the permittivity of the components of the insulation.
  • the permittivity ⁇ o is approximately 2, for the cellulosic material ⁇ p at 4.
  • the load on the individual insulation components results in the voltage U o applied to the oil being approximately twice as high , such as the voltage U p applied to the cellulose material.
  • the impregnation 11 does not influence the stress distribution in the insulation according to the invention since the permittivity ⁇ BNNT is also approximately 4, and therefore the permittivity ⁇ comp of the impregnated cellulosic material is also approximately 4 lies.
  • the voltage U o applied to the oil is approximately twice as great as the voltage U comp applied to the nanocomposite (cellulosic material).
  • the breakdown strength of the insulation in the case of HVDC components when DC voltages are present is also important.
  • the distribution of the applied voltage to the individual insulation components is then no longer dependent on the permittivity, but on the resistivity of the individual components.
  • the specific resistance ⁇ o of oil is between 10 13 and 10 12 ⁇ m.
  • a larger part of the voltage drop to relieve the cellulosic material in the oil and that the specific resistance of the oil decreases when a voltage is applied is rather, as in Fig. 1 shown starting from a specific resistance ⁇ o of 10 12 Qm.
  • ⁇ p of cellulose material is three orders of magnitude higher and is 10 15 ⁇ m.
  • the inventively introduced into the cellulosic material 19 impregnation 11 may, for. B. from BNNT and is adjusted by a suitable coating of BNNT from PEDOT: PSS and possibly by an additional doping of the BNNT with dopants with their resistivity (between 0.1 and 1000 ⁇ cm), that the specific resistance of the cellulose material ⁇ p is lowered.
  • PEDOT: PSS or the sole use of BNNT.
  • the voltage U o applied to the oil is of the order of magnitude in the region of the voltage U comp applied to the composite, so that a balanced voltage profile is established in the insulation.
  • the dielectric strength of the insulation is advantageous improved because the load on the cellulosic material noticeably reduced.
  • FIG. 2 two adjacent HVDC transformer coils 22 can be seen. These are provided at their front ends 23 with shield rings 24, followed by Isolierumblen 25, which are formed by a plurality of solids barriers 26 in the form of pressboard moldings. These also form fireplaces 27, which serve as an interface for the wiring 28 a line 29 between the HVDC transformer coils 22.
  • the line 29 is laid in an installation space which is formed by the electrode tube 21.
  • This is preferably made of copper and has a layer 30, which is formed by two layer layers 31.
  • the layer layer forming the surface of the electrode tube 21 comes into contact with the transformer oil, not shown, and has an impregnation (treatment) which lowers the resistivity of the cellulosic material used in the order of magnitude in the range of resistivity of transformer oil.
  • the layer layer 31, which adjoins the metallic electrode tube 21, is advantageously further lowered in its specific resistance so that it falls below the specific resistance of transformer oil.
  • Distances a of the ends of the electrode tube 21 to the coils 22 and the shield rings 24 allow a tolerance compensation during installation of the electrode tube 21 as a wiring 28. This can be sized generous by the treatment of the invention insulation.
  • the chimneys of both coils formed by the solid barriers 26 are connected to each other by further solids barriers 32, so that also between the two coils 22 a closed Isolierrange to the wiring 28 results.
  • the solids barriers are also provided with the cellulosic material according to the invention, so that the specific resistances of the solid-state barriers are at least approximately equal to the specific resistance of the transformer oil in comparison to the use of untreated cellulose material.
  • the overlapping areas b between the chimneys 27 and the solid barriers 32 can be made in a reduced length, whereby a space-saving structural design is possible. In particular, in smaller overlapping areas b the assembly is facilitated in confined spaces.
  • an attachment 35 is only indicated. This is supported in a manner not shown in the housing of the HVDC component and ensures a clear positioning of the individual components to each other. This is of importance, inter alia, in order for the solids barriers 32 to be inserted into the gaps of the solids barriers 26 so that the overlaps b result.
  • FIGS. 3 to 5 Various mounting arrangements for the wiring are shown schematically.
  • the coils 23 are shown greatly simplified as circles.
  • FIG. 3 the wiring in component construction is shown as a variant of a leg assembly as is common in the prior art.
  • the wiring in component construction 34 is a pipe system, which at its branched ends the electrode tubes 21 to approximate the coil 23 is available.
  • the component-type wiring 34 also has a solid barrier 33 to form an insulating gap. Therefore, solid barriers 32 are also required, which establish a connection between the chimneys 27 and the solids barrier 33 of the conduit 34.
  • the structure can essentially according to FIG. 2 be executed.
  • FIGS. 4 and 5 show arrangements for the routing, according to FIG. 2 are constructed.
  • a line 21 according to FIG. 2 may be formed by a straight-line connection in the space between the HVDC transformer coils 23.
  • the wiring 21 according to FIG. 5 curved to execute. This makes it possible to guide the line in a region which has a greater spacing between the HVDC transformer coils 23.
  • the solid barriers, which must also be curved can in this case for example be formed as shaped bodies, which are equipped as half-shells with a parting plane in the plane of the drawing.
  • the plane of the drawing represents the plane in which the curved center line 36 of the cable guide lies.

Claims (8)

  1. Guidage de lignes (23) électriques de liaison de deux bobines (22) de transformateur de courant continu à haute tension ou de bobines de self de courant continu à haute tension qui sont voisines, comportant
    • un tube (21) formant électrode, ayant une surface conductrice et un espace de montage de la ligne (29),
    • une couche (30) en matière (19) cellulosique, notamment en papier, qui entoure, sur tout le pourtour, le tube (21) formant électrode,
    caractérisé
    en ce que la couche (30) est réalisée sous la forme d'un produit composite constitué d'une matière cellulosique traitée,
    • dans laquelle des particules, ayant une résistivité plus petite que la résistivité ρp de la matière cellulosique non traitée, sont réparties en une concentration supérieure au seuil de percolation et/ou
    • dans laquelle un réseau d'un seul tenant d'un polymère conducteur, ayant une résistivité plus petite que la résistivité ρp de la matière cellulosique non traitée, traverse le composite,
    le guidage de lignes étant conçu pour un montage d'enroulement et le tube (21) formant électrode étant dimensionné en longueur de manière à s'adapter dans l'espace intermédiaire subsistant entre les bobines voisines et pouvant être monté en ayant ses extrémités entre deux bobines de transformateur de courant continu de haute tension ou bobines de self à courant continu à haute tension voisines, en laissant subsister une fente comme compensation des tolérances entres les extrémités du tube (21) formant électrode et celles de la bobine de transformateur de courant continu à haute tension de la bobine de self à courant continu à haute tension voisine.
  2. Guidage de lignes suivant la revendication 1,
    caractérisé
    en ce que la résistivité ρcomp spécifique du composite est, au moins à la surface de la couche (30), d'au plus 5 fois 1013 Ωm.
  3. Guidage de lignes suivant la revendication 2,
    caractérisé
    en ce que la résistivité ρcomp du composite représente, au moins à la surface de la couche (30), de une à vingt fois la résistivité ρo de l'huile du transformateur.
  4. Guidage de lignes suivant la revendication 2,
    caractérisé
    en ce que résistivité ρcomp du composite correspond, au moins à la surface de la couche (30) de la gaine, en ordre de grandeur à la résistivité de l'huile du transformateur.
  5. Guidage de lignes suivant l'une des revendications précédentes, caractérisé
    en ce que le tube formant électrode est réalisé incurvé, la courbure devant à l'état monté se trouver dans un plan perpendiculaire à l'axe de symétrie de la bobine (22) de transformateur de courant continu à haute tension ou de la bobine de self à courant continu à haute tension.
  6. Guidage de lignes suivant l'une des revendications précédentes, caractérisé
    en ce que la résistivité de strates (31) voisines formant la couche (30) est étagée, la strate de la couche ou les strates de la couche ayant la résistivité la plus petite étant voisines du tube (21) formant électrode.
  7. Guidage de lignes suivant l'une des revendications précédentes, caractérisé
    en ce que la couche (30) est en un enroulement de papier ayant plusieurs stades d'enroulement, l'enroulement de papier étant enroulé autour du tube (21) formant électrode.
  8. Guidage de lignes suivant l'une des revendications précédentes, caractérisé
    en ce qu'il est prévu, autour du tube (21) formant électrode, des barrières de matière solide avec formation de fentes pour de l'huile de transformateur entre les barrières de matière solide entre elles et pour le gainage, qui sont, au moins en partie, également en la matière (19) cellulosique traitée.
EP11810844.8A 2011-01-07 2011-12-27 Guide de conduites pour des transformateurs de transmission de courant continu haute tension et des bobines de réactance de transmission de courant continu haute tension Not-in-force EP2661761B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011008456A DE102011008456A1 (de) 2011-01-07 2011-01-07 Leitungsführung für HGÜ-Transformatorspulen oder HGÜ-Drosselspulen
PCT/EP2011/074092 WO2012093055A1 (fr) 2011-01-07 2011-12-27 Guide de conduites pour des transformateurs de transmission de courant continu haute tension et des bobines de réactance de transmission de courant continu haute tension

Publications (2)

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EP2922070A1 (fr) * 2014-03-19 2015-09-23 ABB Technology Ltd Système d'isolation électrique et dispositif à induction électromagnétique haute tension comprenant celui-ci
EP3076409B1 (fr) * 2015-03-30 2017-12-13 Siemens Aktiengesellschaft Connexion électrique d'enroulements écartés les uns des autres
DE102015224568A1 (de) 2015-12-08 2017-06-08 Siemens Aktiengesellschaft Vorrichtung zur elektrischen Verbindung von wenigstens vier elektrischen Leitern
DE102017208950A1 (de) * 2017-05-29 2018-11-29 Siemens Aktiengesellschaft Schirmring und/oder Steigungsausgleich für eine Transformatorspule
CN112837916B (zh) * 2021-01-27 2022-02-01 江阴市星火电子科技有限公司 一种带屏蔽的开合式零序电流互感器

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Publication number Publication date
EP2661761A1 (fr) 2013-11-13
BR112013017494A2 (pt) 2016-09-27
CN103403818B (zh) 2017-01-18
CN103403818A (zh) 2013-11-20
DE102011008456A1 (de) 2012-07-12
BR112013017494B1 (pt) 2020-03-31
WO2012093055A1 (fr) 2012-07-12

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