EP2661760A1 - Anneau de protection pour une bobine de transformateur de transmission de courant continu haute tension ou une bobine de réactance de transmission de courant continu haute tension - Google Patents

Anneau de protection pour une bobine de transformateur de transmission de courant continu haute tension ou une bobine de réactance de transmission de courant continu haute tension

Info

Publication number
EP2661760A1
EP2661760A1 EP11807943.3A EP11807943A EP2661760A1 EP 2661760 A1 EP2661760 A1 EP 2661760A1 EP 11807943 A EP11807943 A EP 11807943A EP 2661760 A1 EP2661760 A1 EP 2661760A1
Authority
EP
European Patent Office
Prior art keywords
layer
ring
specific resistance
composite
hvdc
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.)
Granted
Application number
EP11807943.3A
Other languages
German (de)
English (en)
Other versions
EP2661760B1 (fr
Inventor
Beriz BAKIJA
Dieter Breitfelder
Thomas Hammer
Jens Hoppe
Karsten LOPPACH
Johann Schlager
Frank Heinrichsdorff
Ursus KRÜGER
Volkmar LÜTHEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2661760A1 publication Critical patent/EP2661760A1/fr
Application granted granted Critical
Publication of EP2661760B1 publication Critical patent/EP2661760B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H01F27/28—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
    • H01F27/34—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
    • 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

Definitions

  • the invention relates to a shield ring for a HVDC transformer coil or a HVDC choke coil.
  • This has an annular core with an electrically conductive surface, which normally by an electrically conductive layer on an insulating material such.
  • B. block chip is provided and is electrically isolated at one point of the circumference of the core. The remainder of the core is formed in this case from the block chip material.
  • the shield ring has a layer of a cellulosic material, which in particular consists of paper and which completely encloses the core.
  • the layer is normally made by a paper winding .
  • the paper winding as such produces substantially uniform layer thicknesses, said corners must are made with a larger radius and additional layer thickness forth such ⁇ in that in this area deposits are wrapped, for example, paper with. This results in a certain production effort, since the inserts are difficult to handle before wrapping with paper.
  • an impregnable solid material made of cellulose fibers in an aqueous oxidant tion medium such as. B. a weakly acidic solution of iron (III) chloride solution, cerium (IV) sulfate, potassium hexacyanoferrate (III) or molybdatophosphoric acid can be immersed. Subsequently, the wet cellulosic material is treated with either liquid or vapor pyrrole compounds at room temperature until the pyrrole is polymerized depending on the concentration of the oxidizing agent. The thus impregnated cellulosic material is dried at Hauttem ⁇ temperature 24 hours.
  • the oxidizing agent ensures ei ⁇ netrust for the polymerization of pyrrole compounds, and also for increasing the electrical conductivity.
  • the specific resistance p of such impregnated cellulosic materials can thus be influenced by the concentration of pyrroles and the type of oxidizing agent.
  • nanocomposites can also be used as 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 Parti ⁇ kel are nanoparticles, so have a mean diameter of at most 100 nm.
  • AI semiconducting materials can be used for such nanoparticles, the band gap in a range of 0 eV and 5 eV is located.
  • the game ⁇ can be made of ZnO in, can be set the electrical resistance of the nanocomposite. Mens is exceeded a certain proportion of the volume in the admixture of nanoparticles, which, depending on the size of the nanoparticles is 10 to 20 vol%, the specific opponent ⁇ decreases noticeably was the nanocomposite, wherein in this way the electrical conductivity of the nanocomposite and can be adapted to the required conditions.
  • I can set a resistivity of the order of 10 12 Gm. Is achieved so that a voltage drop across the nanocomposite, which has a uniform distribution of potential re ⁇ result, and thus the resultant electric field graded 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 named ⁇ as the ⁇ lektrizticianskonstante to be being used below the Beg ⁇ riff "permittivity.”
  • ⁇ mitt society man denotes by the permittivity ⁇ ⁇ ⁇ / ⁇ designated ratio of the permittivity ⁇ of a Stof- fes is the electric field constant ⁇ 0, indicating the Permittivi ⁇ ty of vacuum. the higher the relative permittivity is, the larger the field weakening effect of the substance used in relation to the vacuum. below Only the permittivity figures of the substances used are treated.
  • WO 2006/122736 A1 also describes a system of cellulose fibers and nanotubes, preferably carbon nanotubes (hereinafter CNT), in which specific resistances of the equivalent of 6 to 75 ⁇ m can be set.
  • CNT carbon nanotubes
  • These nanocomposites are to be used, for example, as electrical resistance heating, the conductivity being designed with regard to an ability of the material to convert electrical energy into heat. For this, a sufficient Bede ⁇ ckungsgrad the cellulose fibers with CNT is required.
  • WO 2006/131011 A1 describes a bush, 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. For this reason, the specific electrical resistance of the nanocomposite remains essentially unaffected.
  • a Na is nokomposit angles with semiconductive or non-conductive nanoparticle which are distributed in a cellulose material such as for example, press ⁇ span, known to the gradierendes as field Mate ⁇ rial in Transformers can be used.
  • At least part of the nanoparticles distributed in the cellulosic material have an enclosure of an electrically conductive polymer.
  • cellulosic material for example, a paste pier, cardboard or pressboard.
  • the cellulose material has a structure composed of cellulose fibers which make up the cellulosic material forming the dressing in ih ⁇ rer entirety.
  • a semi-conductive or non-conductive nanoparticles may, for example, Si, SiC, ZnO, BN, GaN, A1N, or C, to the special ⁇ also boron nitride nanotubes (hereinafter referred to as BNNT) may be used.
  • BNNT boron nitride nanotubes
  • electrically conductive polymers ⁇ mentioned in the DE 10 2007 018 540 AI polymers can be used.
  • 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 known 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.
  • a positively charged ionomer 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 allows beneficial ⁇ way a particularly simple production of the Cellulosemateri- as.
  • the ionomers can be easily dissolved in water and thus fed to the process of making the cellulosic material, which is also water-based.
  • Vernet ⁇ wetting the ionomers following the preparation of the Cellu ⁇ loose material the resistivity of the cellulose 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 resistivity.
  • the ge ⁇ called ionomers can also be used to encase semiconducting already mentioned or non-conductive nanoparticles.
  • the nanocomposite can also be impregnated with semiconducting nanoparticles which consist at least partially of BNNT and are distributed in the cellulose or a polymer.
  • semiconducting nanoparticles which consist at least partially of BNNT and are 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 so 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 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-type conductor (ie, reaching electronic states that emit electrons by thermal excitation across the conduction band edge).
  • a dopant for a p-type doping is for example Be in 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 to be built in.
  • application with the file number DE 10 2009 033 268.5 of the nanocomposite of cellulose material may also be impregnated with semiconducting ⁇ Tenden nanoparticles, whereby to increase the effective conductivity of at least part of the distributed in the insulating nanoparticles a doping of these nanoparticles is provided with dopants.
  • BNNT semi-conductive nanoparticles
  • BNNT has the advantage that low degrees of filling of at most 5 vol%, preferably even at most 2% by volume in the insulating material suffi ⁇ chen to cause percolation of the nanoparticles and thus the electrical conductivity of the nanocomposite to it ⁇ heights.
  • the object of the invention is to provide a shield ring of the aforementioned kind in such a way on, that its manufacture is simplified and / or the security against ⁇ via electrical breakdowns at the layer Cellulosic material is improved.
  • This object is achieved according to the invention in that the layer is embodied as a composite, consisting of a treated cellulose material, in which particles having a lower specific resistance in comparison with the specific resistance p p of the untreated cellulose material are present. ner concentration above the Perkolationsschwelle are distributed.
  • the treated cellulosic material in the treated cellulosic material a coherent network of a conductive polymer with egg nem in comparison to the resistivity p p of the untreated cellulose material lower resistivity pervades the composite.
  • the treated cellulosic material can be obtained in the manner already described above and either produced as a shaped body in which the annular core of the shield ring is inserted.
  • One is at particular possibility is to produce papers as treated Cel ⁇ lulosematerial and then to wrap this with the core in a conventional manner, with the layer resulting from the winding out of the cellulosic material.
  • 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 needed here as HVDC components.
  • cable routing for the electrical connection of various HVDC components it is necessary.
  • Other 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 in example in transformer and reactors 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 inventive design of the treated cellulose material has the advantage that the specific resistance of the thus formed composite p C P om ver ⁇ is Ringert compared to specifi ⁇ rule resistance p p of the untreated cellulose material. In this way it can be achieved that the specific resistance of the composite p CO mp approaches that of the oil Po or, as will be explained in more detail below, even exceeds it. This ensures that in the case of application of a DC voltage at the mitgetrucken by the shielding insulating for the HVDC coil (ie HVDC transformer coil or HVDC choke coil) a voltage ⁇ waste is better distributed to the components of the cellulosic material and the transformer oil.
  • HVDC coil ie HVDC transformer coil or HVDC choke coil
  • the spe ⁇ -specific resistance of the composite C om P p is at least at the upper surface of the shield ring ⁇ at most 5 times 10 13 Qm.
  • 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 good advantage if the specific resistance p C om P of the composite is at most 5 times 10 13 Qm.
  • a specific resistance p CO mp of the composite which is 1 to 20 times the specific resistance p Q of the transformer oil.
  • the resistivity p of the composite CO mp speaks size Trim ⁇ moderately ent ⁇ the specific resistance of the transformer oil.
  • order of magnitude it is meant that the speci ⁇ fic resistance p C om P of the composite differs at most by a magnitude ⁇ order of that of the transformer oil (ie at most by a factor of 10).
  • the specific resistances p 0 , p P and p C om P in the context of this invention are to be measured in each case at room temperatures and a prevailing reference field strength of 1 kV / mm. Under these conditions, the resistivity Po is between 10 12 and 10 13 square meters. It should be noted, however, that the specific resistance p 0 of transformer oil is rather reduced in the case of a heavier load according to the invention 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 p 0 in the transformer oil of 10 12 Qm.
  • the resistivity of adjacent layer layers forming the layer can be graded, with the layer layer or the layer layers having the lowest specific resistance being adjacent to the core .
  • the layers can be formed, for example, by windings with differently impregnated papers. It is then on the core first, the coating layer having the lowest spe ⁇ -specific resistance p P, and thereafter at least one layer ⁇ location P positioned ⁇ introduced C om with a higher resistivity p C om, wherein advantageously the last layer, the surface of which the Forming annular ring, at least on the order of magnitude can correspond to the spe ⁇ cific resistance of transformer oil.
  • the shield ring having regions of different resistivity p C om equip P, be ⁇ is the fact that this is made up of several concentrically into each other dersell individual rings, said inner ring having a single cellulose material having a lower resistivity is provided as the outer single ⁇ ring or several subsequent individual rings.
  • only two individual rings are used particularly advantageously.
  • the individual rings ⁇ form according to the invention together the shield ring, even if they are not structurally related.
  • a shield ring in the sense of the invention is thus to be understood as the entire assembly, which is provided in the region of the front ends of the coil and has a typical Schirmring- structure.
  • the inner ring with a lower resistivity than the outer ring.
  • the already described electrical stress on the rounded, the front end of the coil facing away corners of the cross section of the shield ring is on the inside of the coil namely higher than on the outside. This can be taken into account when designing the cellulose material used on the shield ring.
  • an impregnation of the cellulosic material with a lower concentration is advantageously adjustable for the outer single ring, whereby in particular material costs can be saved.
  • a particular embodiment of the invention provides that the layer of the cellulose material around the entire perpendicular ⁇ right to the ring profile lying cross-section is made substantially the same thickness.
  • This embodiment is, as mode already described, thereby allows the invention according to the spe ⁇ -specific resistance of the cellulosic material is adapted to the Erforder ⁇ nep a Feldgradtechnik such that the electrical stress is spread over the different areas of the screen ring and the surrounding transformer oil.
  • the cellulosic material should also be understood to mean a layer of the shielding ring that is created solely by wrapping a paper strip around the core.
  • Another embodiment of the invention is obtained when the layer of the cellulose material to the whole perpendicular to the ring course ⁇ righthand cross section rests directly on the core. This means that it dispenses with additional deposits, which would indicate an additional production cost ⁇ .
  • the manufacturing cost can be reduced by saving additional deposits. As a result, not only the production cost is reduced, but it is also a higher process reliability achieved because it dispenses with a deposit that could slip during the winding at ⁇ example.
  • the height h of the screen ⁇ rings in comparison to the required level is reduced when using the untreated cellulose material in question instead of the composite.
  • the thickness s of the layer compared to the required thickness when using the relevant untreated cellulose material in place of the composite verrin ⁇ siege.
  • the shield ring has a rectangular cross section with rounded corners perpendicular to the ring path. points, wherein the radius r of these rounded corners is reduced compared to the required radius when using the respective untreated cellulose material in place of the composite.
  • This structural design features can be modified advantageously owing to the already mentioned konstrukti ⁇ ven design margin, wherein in this case the geometrical boundary conditions of the use case may be considered.
  • the geometrical boundary conditions of the use case may be considered.
  • the structural maximum dimensions of HVDC components are predetermined, for example, to allow transport by rail. Umbrella rings with reduced geometric dimensions can make a contribution to reducing installation space here.
  • the installation space that is to say the height h of the shield ring or the thickness s of the layer, it must be taken into account, however, that overall the security against electrical breakdowns still corresponds at least to the predetermined values.
  • FIG. 1 shows a section through an exemplary embodiment of the shielding ring according to the invention, only its surface and the transformer oil adjoining thereto and further solid matter barriers of pressboard being illustrated;
  • FIG. 2 shows an embodiment of the invention
  • FIG. 3 shows an embodiment of the invention
  • An electrical insulating section 18 according to FIG. 1 consists generally of several layers of cellulose material 19, between which oil layers 20 can lie.
  • the insulating starts at the metallic surface 11 of a component to be insulated 12, which may be gebil ⁇ det, for example, by a metal layer 13 on the core of a shield ring is not shown in detail.
  • the cellulose material 19 is impregnated with oil, which is not shown in detail in Figure 1. This is in Figure 1 within the cellulosic material a Imsiegnie ⁇ tion 11 can be seen.
  • the Isolie ⁇ tion shown in Figure 1 surrounds there, for example, in a transformer used windings that need to be electrically insulated to the outside and each other.
  • the electrical insulation of a transformer must prevent electrical breakthroughs in Be ⁇ drive case when applying an AC voltage.
  • the isolation behavior of the insulation depends on the permittivity of the components of the insulation.
  • the permittivity ⁇ 0 is approximately 2, for the cellulosic material ⁇ ⁇ at 4.
  • the load on the individual insulation components results in the voltage U 0 applied to the oil being approximately twice as high , such as the voltage U p applied to the cellulose material.
  • Simultaneously HVDC components is also the fürschlagfes ⁇ ACTION isolation at DC voltages are significant.
  • 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 P o of oil is between 10 13 and 10 12 Gm. Taking into account that according to the invention, a larger part of the clamping voltage ⁇ trash to relieve the cellulosic material in the oil, he should follow ⁇ and that the resistivity of the oil itself When a voltage is applied, it is more likely, as shown in FIG. 1, to assume a specific resistance p 0 of 10 12 Qm. In contrast, p p of the cellulosic material is three orders of magnitude higher and is 10 15 square meters.
  • 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 Qcm), that the specific resistance of Cellulo - Sematerials p p is reduced.
  • This is also allei ⁇ nige using PEDOT: PSS possible or sole use of BNNT.
  • the inventive com- posit set a specific conductivity p C om P, which is approximated to the resistivity p 0 and this roughly corresponds in the ideal case ⁇ .
  • FIG. 2 shows the section of an HVDC transformer, which is shown in a housing which is also referred to as a boiler 21. accommodated. Also indicated are a high-voltage coil and an undervoltage coil whose windings 22, 23 can be seen in FIG. 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 electrical 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 from pressboard, and angle rings 27 likewise made from 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 be modified with of the inventive reduction of the resistivity of cellulose sematerials around which electric field forming influences ⁇ to be 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.
  • the shield ring 24 consists of an inner single ring 35 and an outer single ring 36.
  • the shield ring 24 has a height h and a thickness s of the layer 30, as shown is.
  • Figure 3 is also indicated by dashed contour lines, such as the geometry of a not equipped with impregnated cellulosic material ⁇ th shield ring might look high in comparison.
  • the layer of the inner single ring 35 consists of several layer layers 37, 38.
  • the layer layer 37 forming the surface of the shield ring 24 and the layer 30 of the outer individual ring 36 have a specific resistance which corresponds to that of the surrounding transformer oil in the order of magnitude.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Paper (AREA)
  • Insulating Of Coils (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

L'invention concerne un anneau de protection (24) pour une bobine de transformateur de transmission de courant continu haute tension ou une bobine de réactance de transmission de courant continu haute tension. L'anneau présente un noyau annulaire (28) ayant une surface conductrice (29) et entouré d'une couche (30) en matériau cellulosique. Selon l'invention, la couche (30) est conçue comme composite dont la résistance spécifique est réduite par rapport à celle de matériau cellulosique non traité. Ceci présente l'avantage qu'en cas d'application d'un champ de tension électrique continue à l'anneau de protection, une chute de tension est mieux distribuée sur la couche (30) de l'anneau de protection. Ceci permet de réduire des pics de contrainte de telle manière que l'anneau de protection (24) peut de manière avantageuse être utilisé avec une hauteur (h) réduite et/ou des rayons (r) réduits des coins de la section transversale de l'anneau de protection et/ou une épaisseur réduite de la couche (30). De manière avantageuse, la marge constructive peut être augmentée lors de la conception de l'anneau de protection et les besoins en matériaux peuvent être réduits.
EP11807943.3A 2011-01-07 2011-12-27 Anneau de protection pour une bobine de transformateur de transmission de courant continu haute tension ou une bobine de réactance de transmission de courant continu haute tension Not-in-force EP2661760B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011008462A DE102011008462A1 (de) 2011-01-07 2011-01-07 Schirmring für eine HGÜ-Transformatorspule oder eine HGÜ-Drosselspule
PCT/EP2011/074082 WO2012093052A1 (fr) 2011-01-07 2011-12-27 Anneau de protection pour une bobine de transformateur de transmission de courant continu haute tension ou une bobine de réactance de transmission de courant continu haute tension

Publications (2)

Publication Number Publication Date
EP2661760A1 true EP2661760A1 (fr) 2013-11-13
EP2661760B1 EP2661760B1 (fr) 2018-07-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11807943.3A Not-in-force EP2661760B1 (fr) 2011-01-07 2011-12-27 Anneau de protection pour une bobine de transformateur de transmission de courant continu haute tension ou une bobine de réactance de transmission de courant continu haute tension

Country Status (5)

Country Link
EP (1) EP2661760B1 (fr)
CN (1) CN103415901B (fr)
BR (1) BR112013017401B1 (fr)
DE (1) DE102011008462A1 (fr)
WO (1) WO2012093052A1 (fr)

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DE102013205585A1 (de) * 2013-03-28 2014-10-16 Siemens Aktiengesellschaft Cellulosematerial mit Imprägnierung und Verwendung dieses Cellulosematerials
DE102016205195A1 (de) * 2016-02-02 2017-08-17 Siemens Aktiengesellschaft Schirmring für eine Transformatorspule
AT518664B1 (de) * 2016-04-22 2017-12-15 Trench Austria Gmbh HGÜ-Luftdrosselspule und Verfahren zur Herstellung
DE102017207009A1 (de) 2017-04-26 2018-10-31 Siemens Aktiengesellschaft Schirmring 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
DE102017208950A1 (de) 2017-05-29 2018-11-29 Siemens Aktiengesellschaft Schirmring und/oder Steigungsausgleich für eine Transformatorspule
DE102017212026A1 (de) 2017-05-29 2018-11-29 Siemens Aktiengesellschaft Schirmring und/oder Steigungsausgleich für eine Transformatorspule
CN110737998B (zh) * 2019-09-25 2022-07-26 中国电力科学研究院有限公司 一种基于有限元和深度信念网络的均压环优化设计方法
CN112528534B (zh) * 2020-11-19 2024-05-28 南方电网科学研究院有限责任公司 直流分压器的表面最大电场强度的获取方法、系统及装置
EP4160631A1 (fr) * 2021-04-26 2023-04-05 Delta Electronics, Inc. Structure d'enroulement plane pour transformateur de puissance

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WO2012093052A1 (fr) 2012-07-12
CN103415901B (zh) 2017-05-17
BR112013017401A2 (pt) 2016-10-04
BR112013017401B1 (pt) 2020-09-29
CN103415901A (zh) 2013-11-27
EP2661760B1 (fr) 2018-07-11
DE102011008462A1 (de) 2012-07-12

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