EP2661755B1 - Dispositif d'isolation pour un composant de transmission de courant continu haute tension comportant des barrières aux solides de type paroi - Google Patents

Dispositif d'isolation pour un composant de transmission de courant continu haute tension comportant des barrières aux solides de type paroi Download PDF

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Publication number
EP2661755B1
EP2661755B1 EP11810606.1A EP11810606A EP2661755B1 EP 2661755 B1 EP2661755 B1 EP 2661755B1 EP 11810606 A EP11810606 A EP 11810606A EP 2661755 B1 EP2661755 B1 EP 2661755B1
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EP
European Patent Office
Prior art keywords
insulation
specific resistivity
assembly according
composite
barriers
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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EP11810606.1A
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German (de)
English (en)
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EP2661755A1 (fr
Inventor
Beriz BAKIJA
Dieter Breitfelder
Thomas Hammer
Jens Hoppe
Karsten LOPPACH
Johann Schlager
Ursus KRÜGER
Frank Heinrichsdorff
Volkmar LÜTHEN
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Siemens AG
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Siemens AG
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Publication of EP2661755A1 publication Critical patent/EP2661755A1/fr
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Publication of EP2661755B1 publication Critical patent/EP2661755B1/fr
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    • 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
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/185—Substances or derivates of cellulose
    • 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
    • H01F27/322—Insulating of coils, windings, or parts thereof the insulation forming channels for circulation of the fluid
    • 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 comprises an insulation arrangement for an HVDC component according to claim 1, in particular a transformer or a choke, consisting of a series of wall-like solid barriers made of a cellulose material, between which spaces are provided for a transformer oil and form an insulation gap together with the transformer oil.
  • a transformer or a choke consisting of a series of wall-like solid barriers made of a cellulose material, between which spaces are provided for a transformer oil and form an insulation gap together with the transformer oil.
  • the HVDC component is, for example, a bushing for the electrical connections of an HVDC transformer, which must be electrically insulated and shielded.
  • solid barriers made from pressboard are used, whereby the pressboard has an increased conductivity compared to normal pressboard.
  • the solid barriers form a plurality of spaced-apart formwork around the passage, so that there are gaps between them for filling with transformer oil.
  • the thus impregnated cellulosic material is dried at room temperature for 24 hours.
  • 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 a mean 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. If, during the admixture of the nanoparticles, a certain proportion of the volume is exceeded, which is between 10 and 20% by volume, depending on the size of the nanoparticles, the specific resistance of the nanocomposite is noticeably reduced, with the result that the electrical conductivity of the nanocomposite is adjusted and can be 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.
  • the resulting field peaks can be reduced, which advantageously increases the dielectric strength.
  • the field-weakening effect of the nanocomposite 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. 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.
  • BNNT boron nitride nanotubes
  • 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.
  • PEDOT 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 mentioned ionomers can also be used to coat already mentioned 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 BNNT can be chosen the nanocomposite has a specific conductivity p of the order of 10 12 ⁇ m. According to this variant, no conductive polymers are used as a sheathing 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 a further step after the growth of the BNNT, wherein the dopants are typically 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 object of the invention is to provide an insulation arrangement for a HVDC component, which opens up a comparatively large creative scope, in particular allows a space-saving design.
  • the solid barriers are designed as a composite, consisting of the treated cellulose material, and that the wall thickness of the solid particles is reduced compared to the required wall thickness when using the respective untreated cellulose material instead of the composite.
  • the treatment of the cellulosic material is carried out in accordance with the invention in that particles having a lower specific resistance compared to the specific resistance ⁇ p of the untreated cellulose material are distributed in a concentration above the percolation threshold.
  • a coherent network of a conductive polymer with a lower resistivity compared to the specific resistance ⁇ p of the untreated cellulose material pervades the composite. The preparation of such a treated cellulosic material has already been explained above.
  • the basic idea of the invention is that the use of a treated cellulosic material in the manner indicated automatically reduces the specific resistance ⁇ comp .
  • This reduction in resistivity advantageously leads to an alignment with the specific resistance ⁇ o of transformer oil, so that when the insulation arrangement is stressed with a direct current, the voltage across the insulation section advantageously decreases more uniformly. This means that a greater part of the voltage across the transformer oil drops, thus reducing the burden on the solids barriers.
  • This per se known effect can now be used according to the invention for a constructive modification of the geometry of the insulation arrangement. This is specifically achieved by reducing the wall thickness of the solid barriers.
  • the wall thickness of the solid barriers is currently not designed for a given required mechanical stability but because of the electrical load thereof, which is two to three orders of magnitude due to differences in the resistivity of transformer oil and cellulosic materials when using untreated cellulose material.
  • the wall thickness of the solid barriers used in HVDC components is therefore currently 3 to 6 mm.
  • the wall thicknesses can be reduced, advantageously by at least 25%. It should be noted that the gaps between the solid barriers retain their calculated gap width regardless of whether a treated or untreated cellulosic material is used for the solids barriers. From this it can advantageously be deduced that, when using solid barriers with reduced wall thickness, the overall space requirement of the insulation arrangement is reduced. Solid barriers with wall thicknesses of at least 1 and at most 3 mm can be used particularly advantageously. A wall thickness of 1 mm provides a mechanisehe Design limit for the solid barriers so that they still have sufficient stability in later use in the HVDC component.
  • HVDC components are understood to mean those components which are used to transmit high-voltage direct currents and contain current-carrying elements (HVDC means high-voltage DC transmission).
  • HVDC means high-voltage DC 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 sense 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 wall thickness of adjacent solid particles barriers the insulating section is stepped, wherein the solid barrier is provided with the greatest wall thickness in the region of the Isolatierrange, where the equipotential surfaces of the electric field are compared to the other areas of the insulating section closest to each other.
  • the specific resistance is graduated from adjacent solid-state barriers of the insulating path, wherein the solids barrier with the lowest specific resistance is provided in the region of the insulating path where the equipotential surfaces of the electric field compared to the other regions of the insulating field Isolierumble are closest to each other.
  • the area in which the equipotential surfaces are closest to one another is normally at that end of the insulating path which is closer to the HVDC component to be insulated.
  • the insulating section begins with the innermost solid barrier, where also the equipotential surfaces of the electric field are closest to each other.
  • the insulating section is further defined by the sequence of concentric with each other in the case of a transformer coil further solid barriers. However, these are in areas where the distance between the equipotential surfaces is comparatively already larger.
  • the gradation of the wall thickness of the adjacent solid barriers or of the specific resistance of the adjacent solid barriers advantageously takes into account the distribution of the electric field strength, so that the use of material can be optimized in each case to the locally present field strength.
  • the wall thicknesses of the solids barriers can be optimized over the entire insulating distance, which advantageously leads to the greatest possible saving of installation space.
  • the specific resistances set the solids barriers differently, so for example, impregnation material for the solid barriers can be saved, whereby the material costs are reduced.
  • Advantageous uses for the insulation arrangement are, for example, in the embodiment as winding insulation for transformer coils or inductors. These coils are isolated on their lateral surfaces by solid barriers in the form of cylinders, for example from pressboard. In the region of the end faces of the coils angle rings and caps are arranged, which are also designed as a wall-like solids barriers. All of these components benefit from the design according to the invention with reduced in comparison to untreated cellulose material specific resistivity, so that advantageously the wall thickness of all these individual solid barriers can be reduced.
  • the insulation arrangement of a separation point for a routing for a HVDC component, the wiring itself, or a passage with an electrode for connection to a line in the housing of the HVDC component surrounds.
  • wall-like solids barriers are used, which can be advantageously constructed with thinner wall thicknesses. This simplifies the arrangement of cable guides and associated with these separation points and feedthroughs, since the space in the housing components of HVDC components are often cramped.
  • 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 to recognize an impregnation 11 within the cellulosic material.
  • the according to FIG. 1 insulation shown surrounds, for example, in a transformer there coming to use windings, which must be electrically insulated to the outside and each other.
  • 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 like those on the cellulosic material Voltage U p .
  • 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 greater part of the voltage drop to relieve the cellulosic material in the oil is to take place and that the specific resistance of the oil decreases when a voltage is applied, it is rather, as in Fig. 1 shown to start from a resistivity ⁇ o of 10 12 ⁇ m.
  • ⁇ 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 advantageously improved, since the load on the cellulosic material is noticeably reduced.
  • FIG. 2 is the section of a HVDC transformer to see. This is housed in a designated as boiler 21 housing. Also indicated are a high voltage coil and a low voltage coil whose windings 22,23 in FIG. 2 can be seen.
  • a transformer core 14 is shown only schematically for the sake of clarity.
  • an electric field is represented by field lines 33 extending on equipotential surfaces of the electric field.
  • This electric field is influenced by various elements of an insulation arrangement which, as elements, include segmented shielding rings 24, 25, cylindrical solid material barriers 26 made of pressboard, and angle rings 27 also made of pressboard.
  • the shield rings 24, 25 have a core 28 with a metallic surface 29 and a paper winding 30.
  • the interior space 31 is filled with a filling of transformer oil, which therefore also flows into the gaps 32 between the individual elements of the insulation arrangement and fills them.
  • the field lines 33 also penetrate a pressure ring 34 of block chip.
  • the pressure ring 34 can also be modified to influence the electric field which is being formed in this area.
  • the pressure ring 34 together with a not shown winding table, which can also be made of block chip and the windings 22, 23 carries, for a mechanical cohesion of all modules (including the solid barriers).
  • the pressure ring 34 and the winding table, not shown, are to be understood as elements of the isolation route.
  • FIG. 2 The mechanical interaction of the individual components is in FIG. 2 not shown in detail.
  • annular caps can also be used in a manner not shown, which enclose the shield rings 24, 25 on the windings 22, 23 opposite side.
  • the thickness of the cylindrical solids barriers 26 and the angle rings 27 is reduced.
  • space can be saved, since the width of the column 32 remains constant and thus the width of scatter channels 35 can be reduced.
  • the transformer can be designed to save space. This is of particular importance for a currently emerging trend of HVDC components for ever higher Provide voltage ranges in particular of more than 1000 kV, in which the insulation arrangements are becoming more space consuming.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Insulating Of Coils (AREA)
  • Organic Insulating Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Claims (9)

  1. Agencement d'isolation pour un composant de courant continu à haute tension, notamment un transformateur ou une bobine de self, constitué d'une succession de barrières (26, 27) en matière solide de type à paroi, en une matière cellulosique, entre lesquelles sont prévus des espaces (32) intermédiaires pour une huile de transformateur et qui forment, ensemble avec l'huile de transformateur, une section isolante,
    caractérisé
    en ce que les barrières (26, 27) en matière solide sont réalisées sous la forme d'un composite constitué de la matière (19) cellulosique traitée,
    • dans laquelle sont réparties, en une concentration supérieure au seuil de percolation, des particules (11) ayant une résistivité plus petite que la résistivité ρp de la matière (19) cellulosique non traitée et/ou
    • dans laquelle un réseau ininterrompu d'un polymère conducteur, ayant une résistivité plus petite que la résistivité ρp de la matière (19) cellulosique non traitée, traverse le composite
    et en ce que l'épaisseur de paroi des barrières (26, 27) de matière solide est réduite d'au moins 25 % par rapport à l'épaisseur de paroi nécessaire si l'on utilise la matière cellulosique non traitée concernée au lieu du composite.
  2. Agencement d'isolation suivant la revendication 1,
    caractérisé
    en ce que la résistivité ρcomp du composite est au plus de 5 fois 1013 Ωm mètre.
  3. Agencement d'isolation suivant la revendication 2,
    caractérisé
    en ce que la résistivité ρcomp du composite représente de une à vingt fois la résistivité ρo de l'huile de transformateur.
  4. Agencement d'isolation suivant la revendication 2,
    caractérisé
    en ce que la résistivité ρcomp du composite est de l'ordre de grandeur de la résistivité ρo de l'huile de transformateur.
  5. Agencement d'isolation suivant l'une des revendications précédentes,
    caractérisé
    en ce que l'épaisseur de paroi de barrières (26, 27) de matière solide voisines de la section isolante est étagée, la barrière ayant l'épaisseur de paroi la plus grande étant prévue dans la région de la section isolante où les surfaces équipotentielles du champ électrique sont le plus les unes près des autres par rapport aux autres régions de la section isolante.
  6. Agencement d'isolation suivant l'une des revendications précédentes,
    caractérisé
    en ce que la résistivité de barrières (26, 27) de matière solide voisines de la section isolante est étagée, la barrière de matière solide ayant la résistivité la plus petite étant prévue dans la région de la section isolante où les surfaces équipotentielles du champ électrique sont le plus les unes près des autres par rapport aux autres régions de la section isolante.
  7. Agencement d'isolation suivant l'une des revendications précédentes,
    caractérisé
    en ce qu'il est réalisé en tant qu'isolation d'enroulement pour une bobine (22, 23) de transformateur ou pour une bobine de self.
  8. Agencement d'isolation suivant l'une des revendications précédentes,
    caractérisé
    en ce qu'il entoure un point de séparation pour un guidage de ligne du composant de courant continu à haute tension.
  9. Agencement d'isolation suivant l'une des revendications précédentes,
    caractérisé
    en ce qu'il entoure une traversée comprenant une électrode de connexion à une ligne dans le boîtier du composant de courant continu en haute tension.
EP11810606.1A 2011-01-07 2011-12-27 Dispositif d'isolation pour un composant de transmission de courant continu haute tension comportant des barrières aux solides de type paroi Not-in-force EP2661755B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011008454A DE102011008454A1 (de) 2011-01-07 2011-01-07 Isolationsanordnung für eine HGÜ-Komponente mit wandartigen Feststoffbarrieren
PCT/EP2011/074085 WO2012093053A1 (fr) 2011-01-07 2011-12-27 Dispositif d'isolation pour un composant de transmission de courant continu haute tension comportant des barrières aux solides de type paroi

Publications (2)

Publication Number Publication Date
EP2661755A1 EP2661755A1 (fr) 2013-11-13
EP2661755B1 true EP2661755B1 (fr) 2018-01-31

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Country Status (5)

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EP (1) EP2661755B1 (fr)
CN (1) CN103415894B (fr)
BR (1) BR112013017448B1 (fr)
DE (1) DE102011008454A1 (fr)
WO (1) WO2012093053A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102013205585A1 (de) 2013-03-28 2014-10-16 Siemens Aktiengesellschaft Cellulosematerial mit Imprägnierung und Verwendung dieses Cellulosematerials
WO2016049477A1 (fr) * 2014-09-26 2016-03-31 Momentive Performance Materials Inc. Composite stratifié de nitrure de bore dans du papier pour l'isolation d'un transformateur
AT518664B1 (de) 2016-04-22 2017-12-15 Trench Austria Gmbh HGÜ-Luftdrosselspule und Verfahren zur Herstellung
DE102017208950A1 (de) * 2017-05-29 2018-11-29 Siemens Aktiengesellschaft Schirmring und/oder Steigungsausgleich für eine Transformatorspule
EP3410451B1 (fr) * 2017-05-29 2021-11-17 Siemens Energy Global GmbH & Co. KG Anneau de protection pour une bobine de transformateur

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WO2012041714A1 (fr) * 2010-09-29 2012-04-05 Siemens Aktiengesellschaft Matière cellulosique soumise à imprégnation, utilisation de cette matière cellulosique et procédé pour la produire

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DE102011008454A1 (de) 2012-07-26
CN103415894A (zh) 2013-11-27
EP2661755A1 (fr) 2013-11-13
CN103415894B (zh) 2016-11-02
BR112013017448B1 (pt) 2020-06-02
WO2012093053A1 (fr) 2012-07-12

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