EP4525009A1 - Dispositif haute tension - Google Patents

Dispositif haute tension Download PDF

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Publication number
EP4525009A1
EP4525009A1 EP23197606.9A EP23197606A EP4525009A1 EP 4525009 A1 EP4525009 A1 EP 4525009A1 EP 23197606 A EP23197606 A EP 23197606A EP 4525009 A1 EP4525009 A1 EP 4525009A1
Authority
EP
European Patent Office
Prior art keywords
micro
voltage device
architectured
architectured material
winding
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.)
Withdrawn
Application number
EP23197606.9A
Other languages
German (de)
English (en)
Inventor
Nima Sadr-Momtazi
Anders Daneryd
Kiran Chandra SAHU
Aliae WELANDER
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.)
Hitachi Energy Ltd
Original Assignee
Hitachi Energy Ltd
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 Hitachi Energy Ltd filed Critical Hitachi Energy Ltd
Priority to EP23197606.9A priority Critical patent/EP4525009A1/fr
Priority to KR1020267007973A priority patent/KR20260049315A/ko
Priority to PCT/EP2024/060923 priority patent/WO2025056196A1/fr
Priority to CN202480058714.XA priority patent/CN121866636A/zh
Publication of EP4525009A1 publication Critical patent/EP4525009A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/06—Insulation of windings
    • 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
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • 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
    • H01F27/33—Arrangements for noise damping

Definitions

  • the present disclosure relates to a high-voltage device, particularly to a high-voltage power device.
  • One object to be achieved is to provide a high-voltage device with improved properties, e.g. a reduced noise radiation.
  • the high-voltage device comprises at least one winding and at least one structure adjacent to the at least one winding.
  • the structure comprises a micro-architectured material.
  • micro-architectured materials are materials which can be tailored to desired properties, like the capability of absorbing vibro-acoustic energy. Also the thermal and electric insulation properties can be tailored. The usage of micro-architectured materials in high-voltage devices provides many possibilities for improving the properties of the high-voltage device.
  • a high voltage device is a device in which, during operation, voltage difference of more than 1000 V or more than 1500 V between electrical components of the device appear. For example, during operation, electrical currents of more than 100 A or more than 1000 A flow in the high-voltage device.
  • the high voltage device comprises one or more windings. All features disclosed herein for one winding are also disclosed for the other winding(s).
  • the winding may be wound around a core of metal, e.g. steel.
  • the high-voltage device may be transformer, particularly a power transformer, or a reactor.
  • the at least two windings may be galvanically insulated from each other.
  • the high-voltage device may comprise a primary winding, a secondary winding and a tertiary winding.
  • the at least two windings are, for example, wound around a common core.
  • the windings may be arranged adjacent to each other, i.e. wound around parallel axes which are spaced from each other. Alternatively, the windings may be wound concentrically around the same axis.
  • the structure which is adjacent to the at least one winding comprises or consists of micro-architectured material.
  • the structure may be arranged between two windings or may be arranged inside of the at least one winding.
  • the high-voltage device may comprise two or more structures comprising a micro-architectured material adjacent to the at least one winding. All features disclosed for one structure are also disclosed for all other structures of the high-voltage device.
  • the at least one structure may be electrically insulated from the at least one winding.
  • the structure is spaced from the at least one winding.
  • Micro-architectured materials are also known as metamaterials or MAM. They are a class of porous multiscale materials formed by the periodic or semi-periodic assembly of one or more unit-cells or representative volume elements (RVE) in the design space.
  • the unit cell or RVE may have dimensions in the micrometer to millimeter range.
  • Micro-architectured materials can be designed isotropically or anisotropically. For example, micro-architectured materials provide the possibility to tailor the Poisson's ratio and/or the Young's modulus through the design of the micro-architectured material.
  • the micro-architectured material is designed for damping noise generated in the high-voltage device during operation. This can be achieved by tailoring the Young's modulus and/or the Poisson's ratio of the micro-architectured material.
  • the micro-architectured material may be designed to mitigate the effect of radial and/or axial winding forces and/or may be fine-tuned for force overtones and/or the eigenfrequencies of the high-voltage device.
  • the micro-architectured material has a Young's modulus between 3 MPa inclusive and 200 GPa inclusive.
  • this Young's modulus is the average Young's modulus averaged over all directions or is the minimum Young's modulus or the maximum Young's modulus.
  • the micro-architectured material has a negative Poisson's ratio or a Poisson's ratio of zero. These materials have unique properties and functionalities that are interesting for a wide range of potential applications.
  • the micro-architectured material may have one single value of the Poisson's ratio or it may vary depending on the direction of compression and or depending on the location of the material in the structure.
  • the micro-architectured material may be shape-shifting or shape-morphing.
  • the hexagonal (with positive or negative angle) and chiral unit cells are some examples of the unit cell geometries which can be used for the design of micro-architectured materials with tunable material properties, like the Poisson's ratio.
  • tunable material properties like the Poisson's ratio.
  • the micro-architectured material is formed by an additive manufacturing process, for example by 3D-printing.
  • the skilled person is able to detect whether a structure was formed by additive manufacturing.
  • the micro-architectured material is formed in one piece or integrally, i.e. without internal interfaces.
  • the micro-architectured material has an anisotropic structure.
  • the micro-architectured material may have a different structure in radial direction than in circumferential and/or axial direction.
  • Anisotropic structures can provide particular beneficial effects in view of noise damping.
  • the micro-architectured material has a porous structure.
  • the porosity is between 10% and 90% inclusive.
  • porosity is defined as the cavity volume (volume of the pores) over the total volume.
  • the structure is at least partially arranged in oil.
  • the micro-architectured material is arranged in the oil.
  • the oil is used for cooling and/or electrical insulation in the high-voltage device.
  • the structure is embedded in the oil, i.e. is in contact with the oil.
  • the pores of the micro-architectured material are formed such that the micro-architectured material is permeable for the oil.
  • the micro-architectured material is impregnated with the oil.
  • the micro-architectured material is at least partially formed of cellulose. Additionally or alternatively, the micro-architectured material may be at least partially formed of polymer and/or metal.
  • the structure is a barrier between two windings of the high-voltage device. Additionally or alternatively, the structure is a barrier between the at least one winding and a housing of the high-voltage device.
  • the housing of the high-voltage device surrounds the winding(s), for example.
  • the housing may be a tank or tank wall, respectively.
  • the barrier may be formed as a plate or as a cylinder shell.
  • the structure is a spacer or a spacer-block for one of the winding.
  • Spacers are used to support and separate individual turns of a winding from each other in axial direction and/or to support the turns in radial direction.
  • Spacer-blocks are in particular there to maintain certain distance between winding ends and the core.
  • the structure is an electrical insulation of a winding.
  • the structure is a cover around the turns of a winding.
  • the structure is spaced from the windings.
  • the structure or at least the micro-architectured material thereof is not in contact with any of the windings.
  • the gap between the structure and the windings may at least be partially filled with oil.
  • the micro-architectured material has a TPMS structure.
  • TPMS triply periodic minimal surfaces. This is a non-intersecting 3D surface characterized by a zero value of mean curvature at each point.
  • the micro-architectured material has an octet structure.
  • a unit cell or the RVE of the micro-architectured material has an octet structure.
  • the micro-architectured material or the unit cell / RVE has a tetrakaidekahedron or Gurtner-Durand structure or an irregular tetrahedron structure or a cube structure or a diamond structure or a Kelvin structure or a rhombicuboctahedron structure or a double-pyramid dodecahedron structure.
  • Figure 1 shows a first exemplary embodiment of a high-voltage device 100, namely a power transformer 100.
  • the high-voltage device 100 comprises a housing 6 or tank 6, respectively, in which three windings 1, 2, 3 are arranged.
  • the windings 1, 2, 3 are wound around a common core 5.
  • the tank 6 is filled with oil.
  • a barrier 40 of a micro-architectured material 4 is arranged between the tank 6, i.e. the tank wall, and the windings 1, 2, 3.
  • the barrier 40 of the micro-architectured material 4 is arranged in the oil and impregnated with the oil.
  • the micro-architectured material 4 comprises pores to enable oil to penetrate the micro-architectured material 4.
  • the micro-architectured material is produced by an additive manufacturing process, like 3D-printing. It may comprise or consist of polymer and/or cellulose and/or metal.
  • the micro-architectured material 4 is designed such that the barrier 40 damps the noise generated in the high-voltage device 100 during operation, i.e. absorbs vibrations.
  • the barrier 40 forms a housing surrounding the windings 1, 2, 3.
  • the barrier 40 is spaced from each of the windings 1, 2, 3 such that it does not adjoin any of the metallic parts of the windings 1, 2, 3.
  • the barrier 40 is galvanically isolated from the windings 1, 2, 3. This allows to form the micro-architectured material at least partially from metal.
  • Figure 2 shows a detailed view of a winding 1, 2, 3 as used, for example, in the transformer 100 of figure 1 .
  • the winding 1, 2, 3 comprises a plurality of turns 10 wound around the core and radially spaced from the core by spacer-blocks 11, 41.
  • Some spacer-blocks 41 are formed of the micro-architectured material 4.
  • the micro-architectured material 4 may be impregnated with the oil of the high-voltage device and/or may serve as a noise damping element of the high-voltage device 100.
  • Figure 3 shows a further exemplary embodiment of a high-voltage device 100 with all the windings 1, 2 arranged concentrically.
  • Cylindrically shaped barriers 40 of the micro-architectured material 4 are arranged in radial direction between the two windings 1, 2 and between the inner winding 1 and the core 5.
  • Another cylindrically shaped barrier 40 is formed around the outer winding 2.
  • the barriers 40 may be arranged in the oil and are spaced from the windings 1, 2.
  • the micro-architectured material 4 of the barriers 40 may be designed for damping noise generated in the high-voltage device 100.
  • the exemplary embodiment of a high-voltage device of figure 4 is based on the one of figure 1 . Additionally, plate-shaped barriers 40 of micro-architectured material 4 are arranged between each two adjacent windings 1, 2, 3. These plate-shape barriers 40 are again arranged in the oil of the high-voltage device 100 and are designed for noise damping.
  • Figure 5 shows a first exemplary embodiment of a micro-architectured material 4 with a macroscopic piece of the micro-architectured material on the left side and a detailed view of a lattice representative volume element (RVE) or unit cell of the micro-architectured material on the right side.
  • RVE lattice representative volume element
  • the RVE has a cubic octet structure.
  • the individual struts of the shown RVE may be cylindrical with radius and length between 10 um and 1000 ⁇ m, for example.
  • the RVE has a tetrakaidekahedron or Gurtner-Durand (isotropic) structure.
  • the RVE has an irregular tetrahedron (trigonal symmetry) structure.
  • the RVE has a cube (cubic symmetry) structure.
  • the RVE has a diamond (cubic symmetry) structure.
  • the RVE has a Kelvin (cubic symmetry) structure.
  • the RVE has a rhombicuboctahedron (tetragonal symmetry) structure.
  • the RVE has a double-pyramid dodecahedron (transverse isotropy) structure.
  • the micro-architectured material has a negative Poisson's ratio.
  • the micro-architectured material has a Poisson's ratio of zero.
  • the micro-architectured material has a positive Poisson's ratio.
  • Figures 16 and 17 show exemplary embodiments of micro-architectured materials 4 with a TPMS structure, i.e. a Gyroid structure ( figure 16 ) and a Schwarz P structure ( figure 17 ). These structures are extracted from the paper " On hybrid cellular materials based on triply periodic minimal surfaces with extreme mechanical properties", Chen et al, Materials and Design, 2019, DOI: 10.1016/j.matdes.2019.108109 .
  • Each of the materials of figures 5 to 17 can be used as a micro-architectured material for the high-voltage devices of figures 1 to 4 .
  • Figure 18 shows a further exemplary embodiment of the high-voltage device 100.
  • the high voltage device could be a power transformer or a power reactor.
  • the turns 10 of the winding 1 are axially spaced from each other with the help of spacers 42.
  • the spacers 42 are formed of a micro-architectured material 4, e.g. of one according to figures 5 to 17 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Transformer Cooling (AREA)
EP23197606.9A 2023-09-15 2023-09-15 Dispositif haute tension Withdrawn EP4525009A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP23197606.9A EP4525009A1 (fr) 2023-09-15 2023-09-15 Dispositif haute tension
KR1020267007973A KR20260049315A (ko) 2023-09-15 2024-04-22 고전압 디바이스
PCT/EP2024/060923 WO2025056196A1 (fr) 2023-09-15 2024-04-22 Dispositif haute tension
CN202480058714.XA CN121866636A (zh) 2023-09-15 2024-04-22 高压装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23197606.9A EP4525009A1 (fr) 2023-09-15 2023-09-15 Dispositif haute tension

Publications (1)

Publication Number Publication Date
EP4525009A1 true EP4525009A1 (fr) 2025-03-19

Family

ID=88092887

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23197606.9A Withdrawn EP4525009A1 (fr) 2023-09-15 2023-09-15 Dispositif haute tension

Country Status (4)

Country Link
EP (1) EP4525009A1 (fr)
KR (1) KR20260049315A (fr)
CN (1) CN121866636A (fr)
WO (1) WO2025056196A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016006239A (ja) * 2014-06-20 2016-01-14 株式会社日立製作所 電気絶縁紙およびそれを用いた静止誘導電器
CN113066463A (zh) * 2021-03-23 2021-07-02 国网河北省电力有限公司沧州供电分公司 变压器油箱声振控制用吸隔声结构、变压器油箱及变压器
EP3904818A1 (fr) * 2020-04-30 2021-11-03 ABB Power Grids Switzerland AG Agencement électrique, panneau et échangeur de chaleur
US11719492B2 (en) * 2020-04-30 2023-08-08 Hitachi Energy Switzerland Ag Heat exchanger and electric arrangement comprising heat exchanger

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016006239A (ja) * 2014-06-20 2016-01-14 株式会社日立製作所 電気絶縁紙およびそれを用いた静止誘導電器
EP3904818A1 (fr) * 2020-04-30 2021-11-03 ABB Power Grids Switzerland AG Agencement électrique, panneau et échangeur de chaleur
US11719492B2 (en) * 2020-04-30 2023-08-08 Hitachi Energy Switzerland Ag Heat exchanger and electric arrangement comprising heat exchanger
CN113066463A (zh) * 2021-03-23 2021-07-02 国网河北省电力有限公司沧州供电分公司 变压器油箱声振控制用吸隔声结构、变压器油箱及变压器

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CHAO TANG ET AL: "A review on the research progress and future development of nano-modified cellulose insulation paper", IET NANODIELECTRICS, JOHN WILEY & SONS, INC, HOBOKEN, USA, vol. 5, no. 2, 21 December 2021 (2021-12-21), pages 63 - 84, XP006115626, ISSN: 2514-3255, DOI: 10.1049/NDE2.12032 *
CHEN ET AL.: "On hybrid cellular materials based on triply periodic minimal surfaces with extreme mechanical properties", MATERIALS AND DESIGN, 2019
SIDDIQUE ZAID B ET AL: "Effect of Graphene Oxide Dispersed Natural Ester Based Insulating Oil on Transformer Solid Insulation", IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 29, no. 2, 8 March 2022 (2022-03-08), pages 378 - 385, XP011907145, ISSN: 1070-9878, [retrieved on 20220308], DOI: 10.1109/TDEI.2022.3157926 *

Also Published As

Publication number Publication date
CN121866636A (zh) 2026-04-14
KR20260049315A (ko) 2026-04-13
WO2025056196A1 (fr) 2025-03-20

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