EP3133615B1 - Systeme de bobine electrique - Google Patents

Systeme de bobine electrique Download PDF

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Publication number
EP3133615B1
EP3133615B1 EP15181683.2A EP15181683A EP3133615B1 EP 3133615 B1 EP3133615 B1 EP 3133615B1 EP 15181683 A EP15181683 A EP 15181683A EP 3133615 B1 EP3133615 B1 EP 3133615B1
Authority
EP
European Patent Office
Prior art keywords
winding
boiler
windings
core
electrical 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.)
Active
Application number
EP15181683.2A
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German (de)
English (en)
Other versions
EP3133615A1 (fr
Inventor
Jörg FINDEISEN
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
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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
Priority to EP15181683.2A priority Critical patent/EP3133615B1/fr
Publication of EP3133615A1 publication Critical patent/EP3133615A1/fr
Application granted granted Critical
Publication of EP3133615B1 publication Critical patent/EP3133615B1/fr
Active 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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • 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
    • H01F27/366—Electric or magnetic shields or screens made of 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
    • H01F27/002—Arrangements provided on the transformer facilitating its transport
    • 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
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/04—Cores, Yokes, or armatures made from strips or ribbons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/12—Two-phase, three-phase or polyphase transformers

Definitions

  • the invention relates to an electrical winding arrangement, comprising an active part, which has a core, windings, pressing parts and discharges, and a boiler enclosing the active part, wherein between a first wall portion of the boiler and the active part or a second wall portion of the boiler at least one through the interior the boiler leading, stabilizing element is arranged.
  • Such a winding arrangement is known from DE 387 007 C (D1) already known.
  • an electrical winding assembly is shown having a core with core legs, each core leg being concentrically enclosed by two windings.
  • the core and the windings are arranged in a tank which is filled with an insulating fluid.
  • the tank is closed by a lid.
  • In the upper part of the tank extend between its side wall tie rods for mechanical stabilization of the tank.
  • the FR 1 390 221 A (D2) and the GB 1 035 838 A (D7) also discloses a transformer with a tank and an active part consisting of windings and notches.
  • tie rods are used to generate a winding pressure.
  • this context continue to be the FR 1 353 952 A (D3), the FR 1 340 518 A (D4) and the DE 1 801 968 A1 To call (D5).
  • the composite core, windings, pressed parts (pressing frame, press linkage) and discharge is called active part.
  • Electrical winding arrangements generally have a layer of electrical steel layered core. The layered structure reduces the eddy current losses (iron losses). In addition, such winding arrangements are often performed oil-filled.
  • a steel construction, called boiler or tank, contains the active part. The kettle is closed by a lid. The filling of the boiler with the insulating liquid is usually under vacuum.
  • the boiler and the overall housing of transformers and reactors shall withstand the mechanical stresses resulting from the operational requirements, the test conditions and the evacuation process.
  • the state of the art is boilers in which the required pressure and vacuum resistance over the thickness of the boiler walls, a suitable choice of the Blechfeldebenn and stiffeners on the boiler walls is achieved.
  • the currently used housing therefore require a high material usage, as well as considerable welding effort.
  • the stabilizing element is designed for a compressive load and the Stabilizationseimement comprises a plurality of sections which are arranged linearly and form a Abstützkette, wherein a portion between two windings of the active part or between a winding and a core of the active part is arranged ,
  • the invention is based on the consideration that a mechanical stabilization of the boiler in addition to the strength of the walls could also be achieved by suitable internal supports, struts or tension elements. These can be arranged along the pressure lines or under pressure resulting lines of force and keep the boiler wall on the opposite wall or support it on this wall or on the active part.
  • the stabilizing elements should in this case a particularly high strength, eg. B. by a reinforcement with glass fiber, carbon and / or carbon nanotubes. As a result, the wall of the boiler itself can be made thinner.
  • the stabilizing element is designed for a pressure load.
  • the boiler is stabilized against a vacuum load.
  • the stabilizing element may, for. B. between the first wall portion and a part of the active part and support the wall portion on the winding or the core, or be arranged between two wall sections and support them against each other.
  • the stabilization element comprises a plurality of sections which form a support chain. This means that the sections are arranged linearly and can thus pass on the supporting forces in each case.
  • a section can be arranged between two windings of the active part or between a winding and a core of the active part.
  • a support chain can be guided from the boiler wall to the outside of the main scattering channel winding and from this further via the main scattering channel to the inner winding and the core. This carries both the radial short-circuit forces and the support of the boiler.
  • the electrical winding arrangement comprises at least two interconnected Stabilizing elements. These are particularly advantageous two mutually perpendicular stabilizing elements, which are connected to each other at their point of contact. Thus, the stabilizing elements mutually increase their strength, in particular against buckling.
  • a portion of said support chain, in particular adjacent to a winding have a gap, d. H. the support chain does not extend completely between the components to be supported, but there remains a small gap on the winding, so that the support comes to bear only when the boiler has reached a certain basic deformation.
  • a reduction of the mechanical load of the support arrangement can be achieved.
  • one of the sections of a support element has an insulating element of elastic material on.
  • an insulating element of elastic material can z. B. rubber come into use.
  • Such elastic insulation elements provide a structure-borne sound insulation.
  • One of the sections may advantageously have a releasable wedge-shaped insert. This can be used for customization and adjustment. This is advantageously performed in a groove of the stabilizing element.
  • the stabilizing element may consist of an insulating material and / or be enclosed by an insulating material.
  • the stabilizing elements can thus be mounted between the windings and cable guides of the active part.
  • the material isolates the stabilizing element against the windings and / or the cable guides.
  • the stabilizing element can also be integrated into existing isolable barriers between two windings.
  • the stabilizing element has a circumferential umbrella-shaped insulation. This serves to extend the sliding distances along the stabilizing element from the active part to the boiler wall.
  • the radial supports of the winding parts with each other, as well as the supports of the winding against the leg of the core are dimensioned and designed so that they can absorb the radial forces occurring in the event of a short circuit.
  • the support elements of the inner windings and the support to the core are aligned such that the short circuit forces cause no deformation of the winding.
  • the support elements of the outer winding, and the support elements are also aligned to the boiler so that the forces acting in the case of a vacuum in the boiler forces are positively discharged through the active part.
  • the boiler of the transformer is subjected to a vacuum only during drying and filling processes. As a result, the corresponding loads do not occur during operation of the transformer. Since a simultaneous stress on the support of the vessel by vacuum and a stress of the winding is excluded by short-circuit forces, the design and dimensioning of the individual elements of the entire support chain advantageously only after the higher of the two stresses.
  • At least a part of the stabilizing elements is designed such that they are suitable both for absorbing the pressure forces under vacuum stress and the tensile forces at elevated internal pressure of the boiler.
  • the mechanical support of the vessel takes place in such a way that the mechanical structure of the vessel wall is formed from resulting sheet metal fields whose natural frequency is smaller than twice the mains frequency of the transformer. This can reduce the emission of noise.
  • the advantages achieved by the invention are in particular that by the introduction of tensile and / or supporting elements in the boiler of an electrical winding arrangement such.
  • a choke coil or a power transformer whose mechanical stability is increased and thereby the wall thickness can be selected lower and reinforcements in the boiler wall can be omitted.
  • the tensile and / or supporting elements are designed so that they can compensate for the loads under pressure or vacuum stress or occurring in a short circuit forces.
  • they can be designed so that they take over the support of the active part in the boiler to absorb the stress of the acceleration values during transport of the winding assembly.
  • FIG. 1 shown schematic section are partial two windings 4 shown in each case one leg of the core 2 in the viewing direction along the axis of the windings.
  • the windings 4 and the core 2 are arranged in a boiler 6, which is filled with oil under vacuum.
  • the winding arrangement 1 has a linear stabilizing element 8.6, which extends perpendicularly from a first wall section 10 to an opposite wall section 12 parallel to the first wall section 10.
  • the stabilizing element 8.6 is made in one piece and designed for a high tensile load, d. H. also made of corresponding materials.
  • the stabilizing element 8.6 is secured by means of an external screw 14.
  • the stabilizing element 8.6 is secured by means of an internal clamping element 16.
  • the stabilizing element 8.6 extends between the two windings 4 shown perpendicular to the axis therethrough. It is enclosed in the central region by an insulating material 18.
  • FIG. 1 shows the course of the stabilizing elements 8.6 and the stabilizing element 8.6 in section perpendicular to the axis of the windings.
  • the FIGS. 2 to 4 shows various arrangements and shapes of stabilizing elements 8.6 and insulating material 18 from the direction A in FIG. 1 ,
  • FIG. 2 shows three stabilizing elements 8.6 arranged with a circular cross-section in the axial direction between the windings 4 one above the other. These are embedded in the insulating assembly 18 between two windings 4, wherein the insulating material 18 extends as a barrier over the entire axial height of the winding 4.
  • FIG. 3 shows an embodiment of the stabilizing elements 8.6 of several tension or tension bands.
  • the tension bands are guided in a channel within the insulating material 18 of the insulating arrangement between two windings 4.
  • These straps are formed in individual embodiments of a tensile insulating material.
  • FIG. 4 shows an embodiment in which a total of five stabilizing elements 8.6 with a circular cross-section are embedded one above the other in an insulating material 20 which extends over the entire axial height of the windings 4.
  • further layers of insulating material 18 are provided between the windings 4 spaced parallel thereto.
  • FIG. 5 and 6 illustrated embodiments show on the one hand and stabilizing elements 8.1, which are designed for a pressure load and thus stabilize the boiler 6 against pressure and fix the core 2 against the accelerations during transport in the boiler 6, on the other hand, the detailed structure of the core 2 and the windings. 4
  • FIG. 5 shows the core 2 in its construction of layered electrical sheets 22.
  • the core 2 are concentrically shown two layers of inner windings 4A and outer windings 4B, which are spaced from each other. An adjacent winding 4 is also indicated.
  • the boiler 6 enclosing the windings 4, 4A, 4B has a rectangular cross-section, at the longitudinal end of which the windings 4A, 4B shown in detail are arranged.
  • the stabilizing elements 8.1 emitting from the core 2 in a cross-shaped manner support the boiler 6 at the core 2.
  • the stabilizing elements 8.1 are divided into sections: In the case of the three stabilizing elements 8.1 facing the wall of the boiler 6, a first section supports the outermost winding 4B on the boiler 6. The other, following in a straight line sections support the windings 4A, 4B against each other and finally the innermost winding 4A on the core 2. This results in a continuous Abstützkette of the wall of the boiler 6 to the core 2 and again to the opposite wall.
  • the fourth stabilizing element 8.1 points to the adjacent winding 4 and supports the outer winding 4B against the outer winding 4B of the winding 4 just described.
  • the outermost portions of the stabilizing elements 8.1 each have two umbrella-shaped, circumferential insulation 24, which serve to extend the sliding distances between adjacent outer windings 4B and winding 4B and wall of the boiler 6.
  • the structure for the adjacent winding 4 shown only at the edge is the same.
  • FIG. 6 illustrated embodiment shows in contrast to the in FIG. 5 illustrated embodiment, in addition, between the two illustrated legs of the core 2 similar to in FIG. 1 arranged, designed for a tensile load stabilizing element 8.6. This is connected at the intersection with the designed for a compressive load stabilization element 8.6 between the windings 4. This designed for tensile stabilizing element 8.6 is also designed in the embodiment, in such a way that it simultaneously represents an additional stabilizing element 8.1 for pressure load.
  • FIG. 7 shows a further embodiment in which the forces are absorbed by vacuum stabilization elements 8.1, 8.2, 8.3.
  • the stabilizing elements 8.1, 8.2, 8.3 are linearly linked together and form a support chain.
  • the stabilizing elements 8.1 from the boiler 6 to the outer winding 4B, the winding parts 4A, 4B of the core 2, and the stabilizing elements 8.2 between the winding parts 4A, 4B and the stabilizing elements 8.3 between core 2 and winding part 4B form by their concatenation stabilizing support chain for the boiler 6.
  • the stabilizing elements 8.1, 8.4 are used for fastening insulation barriers 24 between winding 4B and boiler 6.
  • the support elements 8.1, 8.4 of the boiler 6 are equipped with holding devices for fastening electrical lines 26 to the taps of the windings 4.
  • FIG. 8 shows an embodiment in which the horizontally arranged stabilizing element 8.4 is integrated to support the boiler 6 in a device 28 for the axial compression of the winding 4.
  • the axially spaced apart from the winding 4 parts of the stabilizing device of the boiler 6 now form part of the power transmission chain for the axial winding tension 28.
  • this embodiment is executable to the effect that the horizontally arranged in the embodiment stabilization device of the boiler takes over the radial guidance of the winding press 28 and the axial Winding press 28 is the vertical position fixation of the stabilizer 8.4 of the boiler 6.
  • the stabilizing element 8.5 for supporting the vessel wall is designed in such a way that that it simultaneously takes over the pressing of the electrical sheets 22 of the core 2.
  • the walls of the boiler are provided with stiffening elements 13, which are arranged such that they form interfaces with the stabilizing elements 8.1, 8.4 of the boiler 6 and to this a frictional connection between the stabilizing elements 8.1, 8.4 and the wall 10, 12 of the boiler 6 is provided.
  • FIG. 9 to FIG. 13 show various embodiments of stabilizing elements 8.1, 8.6 in various three-phase power transformers.
  • a schematic section perpendicular to the respective axis of the windings 4 is shown.
  • the boiler 6 have different cross sections, such. Rectangular ( FIG. 9 . FIG. 11 (with fold on a corner, FIG. 13 ) or as interlocking circles ( FIG. 10 . FIG. 12 ), which each concentrically surround the windings 4.
  • the embodiments shown there differ in the arrangement of the stabilizing elements 8.1, 8.6. Depending on the design of the power transformer and the mechanical loads arising during operation or during transport, these are designed and arranged for tension or pressure.
  • the stabilizing elements 8.1, 8.6 may be formed according to the embodiments shown before the description of the drawings.

Claims (8)

  1. Agencement (1) de bobine électrique, comprenant une partie active, qui a un noyau (2), des enroulements (4A, 4B), des pièces moulées et dérivations et une cuve (6) entourant la partie active, dans lequel il est disposé
    - entre une première partie (10) de paroi de la cuve (6) et
    - la partie active ou une deuxième partie (12) de paroi de la cuve (6)
    au moins un élément (8) de stabilisation passant à l'intérieur de la cuve,
    caractérisé en ce que
    l'élément (8) de stabilisation est conçu pour une charge de compression et l'élément (8) de stabilisation comprend plusieurs segments, qui sont disposés linéairement et qui forment une chaîne d'appui, un segment étant disposé entre deux enroulements (4A, 4B) de la partie active ou entre un enroulement (4) et un noyau (2) de la partie active.
  2. Agencement (1) de bobine électrique suivant la revendication 1, qui comprend au moins deux éléments (8) de stabilisation reliés entre eux.
  3. Agencement (1) de bobine électrique suivant l'une des revendications précédentes, dans lequel l'un des segments a une fente.
  4. Agencement (1) de bobine électrique suivant l'une des revendications précédentes, dans lequel l'un des segments a un élément isolant en une matière élastique.
  5. Agencement (1) de bobine électrique suivant l'une des revendications précédentes, dans lequel l'un des segments a un insert amovible cunéiforme.
  6. Agencement (1) de bobine électrique suivant l'une des revendications précédentes, dans lequel l'élément de stabilisation est en une matière isolante.
  7. Agencement (1) de bobine électrique suivant l'une des revendications précédentes, dans lequel l'élément (8) de stabilisation est entouré d'une matière (18, 20) isolante.
  8. Agencement (1) de bobine électrique suivant l'une des revendications précédentes, dans lequel l'élément (8) de stabilisation a un isolant (24) en forme d'écran faisant le tour.
EP15181683.2A 2015-08-20 2015-08-20 Systeme de bobine electrique Active EP3133615B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15181683.2A EP3133615B1 (fr) 2015-08-20 2015-08-20 Systeme de bobine electrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15181683.2A EP3133615B1 (fr) 2015-08-20 2015-08-20 Systeme de bobine electrique

Publications (2)

Publication Number Publication Date
EP3133615A1 EP3133615A1 (fr) 2017-02-22
EP3133615B1 true EP3133615B1 (fr) 2018-12-26

Family

ID=53886984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15181683.2A Active EP3133615B1 (fr) 2015-08-20 2015-08-20 Systeme de bobine electrique

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EP (1) EP3133615B1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3654354A1 (fr) * 2018-11-14 2020-05-20 ABB Schweiz AG Supports internes pour transformateurs en forme de coque
DE102020204661A1 (de) 2020-04-14 2021-10-14 Siemens Aktiengesellschaft 1Elektrisches Gerät mit Beulenkessel

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE387007C (de) * 1921-08-12 1923-12-27 Siemens Schuckertwerke G M B H Kessel fuer OEltransformatoren mit Verankerung der Kesselwaende im Innern des Kessels
DE834260C (de) * 1949-01-19 1952-03-17 Siemens & Halske A G Gehaeuse, insbesondere fuer elektrische Geraete
FR1226257A (fr) * 1958-06-11 1960-07-11 English Electric Co Ltd Transformateur électrique de puissance polyphasé
US3164793A (en) * 1959-02-05 1965-01-05 Mc Graw Edison Co Support for electrical transformer
AT237090B (de) * 1962-10-19 1964-11-25 Elin Union Ag Transformator
FR1340518A (fr) * 1962-11-29 1963-10-18 Bruce Peebles & Co Transformateurs et bobines de réactance perfectionnés
FR1353952A (fr) * 1963-04-19 1964-02-28 Ass Elect Ind Agencement de support perfectionné pour bobines de transformateur et procédé d'utilisation
FR1390221A (fr) * 1963-10-19 1965-02-26 Elin Union Ag Transformateur
FR1437071A (fr) * 1965-06-10 1966-04-29 Inst Dispositif de gainage pour des appareils électriques, en particulier des transformateurs du type à faible isolement et à peu de fluide de refroidissement
DE1267337B (de) * 1966-12-02 1968-05-02 Continental Elektronindustrie Fluessigkeitsisolierter Gross- oder Grenzleistungstransformator
DE1801968A1 (de) * 1968-10-09 1970-06-04 Continental Elektro Ind Ag Transformator
WO2001054147A1 (fr) * 2000-01-20 2001-07-26 Tyco Electronics Amp Gmbh Electro-aimant
US7113065B2 (en) * 2003-09-30 2006-09-26 Rockwell Automation Technologies, Inc. Modular inductor for use in power electronic circuits
WO2010078682A1 (fr) * 2008-12-30 2010-07-15 特变电工沈阳变压器集团有限公司 Procédé de protection contre les fuites magnétiques de transformateur à capacité très élevée

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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