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WO2017134040A1 - Collier de blindage pour bobine de transformateur - Google Patents

Collier de blindage pour bobine de transformateur Download PDF

Info

Publication number
WO2017134040A1
WO2017134040A1 PCT/EP2017/052007 EP2017052007W WO2017134040A1 WO 2017134040 A1 WO2017134040 A1 WO 2017134040A1 EP 2017052007 W EP2017052007 W EP 2017052007W WO 2017134040 A1 WO2017134040 A1 WO 2017134040A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrically conductive
conductive layer
ring according
filler
particles
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.)
Ceased
Application number
PCT/EP2017/052007
Other languages
German (de)
English (en)
Inventor
Dieter Breitfelder
Steffen Lang
Andreas Möhl
Bastian PLOCHMANN
Reinhold Raith
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of WO2017134040A1 publication Critical patent/WO2017134040A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • H01F27/288—Shielding
    • H01F27/2885—Shielding with shields or electrodes
    • 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
    • H01F27/361—Electric or magnetic shields or screens made of combinations of electrically conductive material and ferromagnetic 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
    • H01F27/34—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 as used for windings of transformers of various voltages and different power, for example for HVDC transformer coils or HVDC choke coils to reduce the electrical load on the edges of the ladder.
  • Windings for transformers of both higher voltage and power as well as normal or lower voltage and / or power are typically made from round wire, flat wire and / or twisted wire. Due to the small radii of curvature of the wires is the inhomogeneity of the electrical field ⁇ rule on winding start, winding end and size ⁇ ren distances between two turns - also called simply "holes - very high. To ensure the cooling of the windings, the insulation can not be made arbitrary at these locations; an increase in the distances is out of the question for economic reasons.
  • a common approach is to reduce the inhomogeneity of the electric field. This is usually done by increasing the rounding radius. Where rounding radii can not or only with difficulty be changed, the same effect can be achieved by installing one or more shield rings for controlling the electric field.
  • Shield rings are known, for example, from DE 10 2011 008 462.2.
  • a shield ring an annular core with an electrically conductive surface, which is normally by an electrically conductive layer of a conductive material such as metal and an Iso ⁇ lierstoff such.
  • the cellulose is applied, for example in paper form, by elaborate winding. This produces in the windings to the shield ring around spaces in - for example - wrinkles, in de ⁇ NEN undesirably, for example transformer oil, and / or may be located air.
  • the object of the invention is to form a shield ring of the type specified in the further that the disadvantages of the prior art are overcome, in particular its manufacture is simplified and / or wrapping with a conductive material can be omitted and still safety is improved against electrical breakdowns on the electrically conductive layer.
  • the solution of the problem is disclosed below in the description, the claims and the figure.
  • the present invention is a shield ring for a transformer, an annular core with an electrically conductive layer completely enclosing said core comprising, the electroconducting ⁇ hige layer is designed as a composite comprising at least one insulating polymeric matrix with at least one Fraction of electrically conductive filler particles, wherein the electrically conductive filler particles are contained in an amount above the percolation threshold and contain at least one fraction of filler particles having an average particle size in the range of 500 nm to lOOym, wherein the material of the filler particles is selected from the group of the following compounds : Metal, carbon, metal oxide,
  • mice all of the aforementioned compounds and thereby doped as coated or uncoated particles, partly do ⁇ out or undoped herein and / or in any desired mixtures of the abovementioned compounds.
  • the material of the electrically conductive filler particles metal, metal alloy, carbon, metal oxide and / or mica are generally preferred, wherein These components can be used as spherical, spherical, rod-like fibrous structures and / or other particles and be ⁇ arbitrary mixtures thereof, are present.
  • the materials mentioned above can be set as the filler particles alone or in admixture, as well as coated particles a ⁇ , with particular metals, Metalllegie ⁇ approximations and / or metal oxides are suitable as a coating material. Both the particles and the coating are present, for example, in doped or undoped form.
  • filler particles which can be used depending on the application. Specifically mentioned here are carbon particles, particles of doped Koh ⁇ lenstoff, coated and teildotiertem mica, doped metal oxide, and / or any mixtures of the aforementioned components, furthermore particles of precious, semi-precious or base Metallen- and metal alloys such as copper,
  • Chromium, silver, aluminum, steel, etc., and these particles can also be coated or uncoated again doped, doped or undoped teilwei ⁇ se.
  • the filler made of coated metal, carbon, doped metal can also metal, and in particular be ⁇ coated sondere also be a semi-precious metal or noble metal, said coated, for example, with metal particles and / or metal oxide coated particles, thus for example with silver, chromium , Palladium, silver oxide, chromium oxide and / or aluminum oxide-coated particles, in particular metal particles and particularly preferably particles of a semi-precious metal such as copper, are provided.
  • precious metals in the present case the elements ruthenium, palladium, silver, gold, osmium, iridium, platinum and mercury are referred to, and any alloys, the noble metals among themselves or alloys in which these metals occur, are included under the term.
  • Semi-precious metal is referred to herein in particular copper and Kup ⁇ fer alloys, but also technetium, rhenium, antimony in its metallic modification and / or bismuth and their alloys.
  • Metal oxide particles are provided, in particular from the following Ma ⁇ terialien: metal oxides in binary and tertiary mixing phase, in particular tin oxide, zinc oxide, zinc stannate, Ti ⁇ tanoxid, lead oxide, silicon carbide, and any mixtures of these metal oxides, each coated back or non ⁇ coated and doped partially doped or undoped before ⁇ lying.
  • the coating can account for up to 50% by weight of the weight of the filler particulate, however, typically the proportion of coating to the total weight of the filler particulate is less than 20%, for example 10%.
  • doping substance for example, one or more elements selected from the group comprising: antimony, indium, cadmium.
  • the coating of the particles is also - like the particles themselves - again either doped or undoped before. Any combinations can be used according to the invention.
  • the size of a fraction of filler particles is in the range from 500 nm to Be ⁇ lOOym, in particular from 700nm to 70ym, particularly preferably in the range of lym to 50ym.
  • the filler is present in the composite in a particle mass concentration of, for example, greater than or equal to 25% by weight, preferably greater than or equal to 27% by weight, and in particular preferably greater than or equal to 30% by weight.
  • the material of the electrically conductive layer is above the percussion threshold and the surface resistance of the system hardly changes with increasing particle mass concentration. Characterized the electrically conductive layer is hardly subjected to variations in surface resistance, which is well characterized repro ducible ⁇ .
  • the filler particles are present in at least one fraction as spherical filler particles. In particular, in the embodiment in which the material of the filler particles is based on carbon black, they are at least also spherical.
  • the filler particles are present in at least one fraction as platelet-shaped filler particles.
  • the material of the Grestoffparti ⁇ cle is based on mica, graphite and / or metal oxide, these are at least also platelet-shaped.
  • platelet-shaped filler particles based on coated mica may be present.
  • the coating of the mica particles can in turn also be doped.
  • a filler fraction comprises a filler, for example, particles of a structure of a Materi ⁇ than, a shape, a size, a coating of a material combination is a summary filler fraction, for example, a filler product of a production chain.
  • the polymeric matrix is a chemically crosslinking duromer matrix, such as, for example, a polyurethane, polyester resin, phenolic resin, epoxy resin. xidharz, acrylic resin, acrylate resin, polyester imide and / or silicone resin, as well as any mixtures and copolymers of the aforementioned ⁇ compounds.
  • the polymer matrix is a physically curing thermoplastic matrix.
  • the polymeric matrix over the transformer oil is chemically and / or physically stable, that alternates with the transformer oil not rea ⁇ and / or it does not solve.
  • a protective layer may be located above the electrically conductive layer, so that it is protected against environmental influences, such as, for example, the transformer oil.
  • polymeric conductive substances such as PANI, PEDOT, PEDOT: PSS, etc. can be used.
  • the electrically conductive layer has a square resistance of less than or equal to 10 5 ⁇ , in particular a square resistance of less than or equal to 10 4 ⁇ and particularly preferably a square resistance in the range of 10 "1 ⁇ to 10 4 ⁇ .
  • the electrically conductive layer has a thickness of less than 150ym, in particular of less than lOOym and into ⁇ particular preferably less than 70ym.
  • the thickness of the layer is in the range from 30 ⁇ m to 100 ⁇ m, in particular from 40 ⁇ m to 100 ⁇ m.
  • the electrically conductive layer on the shield ring simply by spraying, dipping, brushing, painting or other coating methods applied.
  • This also shows in particular extreme price differences in the production of the shield rings, because so far, the electrically conductive layer was produced under winding, whereas according to the present invention, these shield rings are produced by an automated immersion.
  • a polymeric matrix is used, which is room-temperature-curing, so that no further aftertreatment of the cured electrically conductive layer in the manufacture of the shield ring is required.
  • FIG. 1 shows a cross-section through an umbrella ring, wherein the left-hand side shows a narrow part 4 and the right-hand side shows a wider part 5 of a basically donut-shaped umbrella ring 1.
  • a shield ring 1 consists of an inner ring 2 and an electrically conductive layer 3.
  • the inner ring 2 forms the core of the shield ring 1 and is example ⁇ formed of block clamping material.
  • comple ⁇ zend epoxy with glass fabric can be in the core phenol hard tissue, - particularly in high temperature applications - and / or wood are proposed.
  • the ring shown in the figure if it were cut and rolled up, would always have the same cross section, So the same height and / or diameter of the core and there ⁇ with the entire shield ring.
  • one or meh ⁇ eral more variant (s) are used of the geometric design of the shield ring, for example as Ste Trentsaus ⁇ same.
  • the height and / or the diameter of the core is varied, otherwise completely the same materials and structure.
  • Particularly preferred is the variant that the cross section or the height of the core increases linearly.
  • This variant saw cut and rolled up, for example, like a wedge cross section, so as a triangle with a totree ⁇ nen tip.
  • a composite used as slope compensation shield ring encloses advantageously only one winding of the transformer, not like the normal and shown in the figure embodiment of the shield ring, which may also enclose several windings ⁇ SEN can.
  • the electrically conductive layer 3 is sprayed on and has not wound up, for example, has a square resistance in the range of 10 "1 ⁇ to 10 4 ⁇ .
  • the electrically conductive layer 3 is produced as follows:
  • a filler consisting of mica and quartz powder, which is coated with metal oxide is dispersed in a Po ⁇ lymer as polyesterimide.
  • the mica is Example ⁇ example with tin oxide Sn0 2 doped with antimony, 15%, coated, and is in flake form before, the quartz powder, the globular present, is the same coating as a whole, the two filler fractions add up to 45 wt .-% PMK (particle mass concentration) in the insulating polymer on.
  • the insulating polymer is preferably curing at room temperature ⁇ Tempe, so that the electrically conductive layer is produced by spraying and / or dipping. In this case, a layer thickness of the electrically conductive layer is realized after curing of 60ym, which has a resistance 0.8-1.3 kOhm.
  • the coating can be applied by spraying.
  • the electrically conductive layer 3 is produced as follows:
  • the filler which is again composed of coated mica and quartz powder, is dispersed in an insulating polymer such as polyester imide (PEI).
  • the mica is Plöt ⁇ chenförmig before, for example, with about 5 to 9 ym average size
  • the silica flour is globular before and will be set in ⁇ finer fraction, for example, average size of 1 to 4 ym.
  • the two Golfstofffraktio ⁇ nell add up to 60 wt .-% PMK (particle mass concentration) in the insulating polymer.
  • a layer thickness of the electrically conductive layer is realized after curing of about lOOym, which has a resistance 1.3 kOhm.
  • the coating can be applied by spraying.
  • copper is used as filler in the insulating polymer, for example platelet-shaped.
  • This filler may comprise, for example, a silver coating or a ⁇ Silberoxidbe harshung.
  • the filler has about 55 wt .-% PMK, layer thickness after curing 60ym, resistance 1 ohm.
  • the polymer used is, for example, PEI, which cures at room temperature, and the coating can in turn be produced by spraying.
  • FIG. 1 also shows a protective layer 6 which protects the electrically conductive layer from environmental influences, in particular also against transformer oil, and is for example made of the same polymer as the matrix of the electrically conductive layer.
  • the invention relates to a shield ring as it is used for windings of transformers, for example for HVDC transformer coils and / or HVDC choke coils for reducing the electrical load on the edges of the ladder.
  • a shield ring comprises an electrically conductive

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Regulation Of General Use Transformers (AREA)

Abstract

L'invention concerne un collier de blindage tel qu'utilisé pour les bobinages de transformateurs, par exemple pour des bobines de transformateur à courant continu à haute tension (CCHT) et/ou des bobines d'inductance CCHT, afin de réduire la charge électrique au niveau des bordures du conducteur. Un tel collier de blindage comprend une couche électriquement conductrice. La présente invention propose comme couche électriquement conductrice une combinaison de matrice polymère et de matériel de remplissage qui permet de régler précisément la résistance de la couche électriquement conductrice d'un collier de blindage et ainsi de réaliser la résistance appropriée de la couche électriquement conductrice en fonction de l'application.
PCT/EP2017/052007 2016-02-02 2017-01-31 Collier de blindage pour bobine de transformateur Ceased WO2017134040A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102016201552.4 2016-02-02
DE102016201552 2016-02-02
DE102016205195.4 2016-03-30
DE102016205195.4A DE102016205195A1 (de) 2016-02-02 2016-03-30 Schirmring für eine Transformatorspule

Publications (1)

Publication Number Publication Date
WO2017134040A1 true WO2017134040A1 (fr) 2017-08-10

Family

ID=59410533

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/052007 Ceased WO2017134040A1 (fr) 2016-02-02 2017-01-31 Collier de blindage pour bobine de transformateur

Country Status (2)

Country Link
DE (1) DE102016205195A1 (fr)
WO (1) WO2017134040A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3462463A1 (fr) * 2017-09-28 2019-04-03 Siemens Aktiengesellschaft Système d'isolation, matériau isolant et matériau isolant destiné à la fabrication du système d'isolation
EP4593045A1 (fr) * 2024-01-26 2025-07-30 Hitachi Energy Ltd Transformateur

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100007452A1 (en) * 2006-08-28 2010-01-14 Abb Technology Ltd. High voltage transformer with a shield ring. a shield ring and a method of manufacture same
DE102011008462A1 (de) * 2011-01-07 2012-07-12 Siemens Aktiengesellschaft Schirmring für eine HGÜ-Transformatorspule oder eine HGÜ-Drosselspule
DE102014211122A1 (de) * 2014-06-11 2015-12-17 Siemens Aktiengesellschaft Elektrisch definiert leitfähiges Multifunktionsband, Verfahren zur Herstellung und Verwendung dazu

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MX2012006488A (es) * 2009-12-14 2012-07-03 3M Innovative Properties Co Material dielectrico con constante dielectrica no lineal.
WO2012000985A1 (fr) * 2010-06-28 2012-01-05 Abb Research Ltd Transformateur avec agencement de couches de commande de champ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100007452A1 (en) * 2006-08-28 2010-01-14 Abb Technology Ltd. High voltage transformer with a shield ring. a shield ring and a method of manufacture same
DE102011008462A1 (de) * 2011-01-07 2012-07-12 Siemens Aktiengesellschaft Schirmring für eine HGÜ-Transformatorspule oder eine HGÜ-Drosselspule
DE102014211122A1 (de) * 2014-06-11 2015-12-17 Siemens Aktiengesellschaft Elektrisch definiert leitfähiges Multifunktionsband, Verfahren zur Herstellung und Verwendung dazu

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3462463A1 (fr) * 2017-09-28 2019-04-03 Siemens Aktiengesellschaft Système d'isolation, matériau isolant et matériau isolant destiné à la fabrication du système d'isolation
WO2019063358A1 (fr) * 2017-09-28 2019-04-04 Siemens Aktiengesellschaft Système d'isolation, matière d'isolation et matériau d'isolation servant à fabriquer le système d'isolation
CN111357060A (zh) * 2017-09-28 2020-06-30 西门子股份公司 绝缘体系、用于制造绝缘体系的绝缘物质和绝缘材料
CN111357060B (zh) * 2017-09-28 2023-03-10 西门子股份公司 绝缘体系、用于制造绝缘体系的绝缘物质和绝缘材料
US11735331B2 (en) 2017-09-28 2023-08-22 Siemens Aktiengesellschaft Insulation system, insulant, and insulation material for producing the insulation system
EP4593045A1 (fr) * 2024-01-26 2025-07-30 Hitachi Energy Ltd Transformateur
WO2025157453A1 (fr) 2024-01-26 2025-07-31 Hitachi Energy Ltd Transformateur

Also Published As

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DE102016205195A1 (de) 2017-08-17

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