EP2735005B1 - Structure de cadre de serrage pour transformateur - Google Patents

Structure de cadre de serrage pour transformateur Download PDF

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Publication number
EP2735005B1
EP2735005B1 EP12756002.7A EP12756002A EP2735005B1 EP 2735005 B1 EP2735005 B1 EP 2735005B1 EP 12756002 A EP12756002 A EP 12756002A EP 2735005 B1 EP2735005 B1 EP 2735005B1
Authority
EP
European Patent Office
Prior art keywords
transformer
press frame
press
tensioning
frame structure
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
EP12756002.7A
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German (de)
English (en)
Other versions
EP2735005A1 (fr
Inventor
Stephan Voss
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
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Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2735005A1 publication Critical patent/EP2735005A1/fr
Application granted granted Critical
Publication of EP2735005B1 publication Critical patent/EP2735005B1/fr
Priority to HRP20160789TT priority Critical patent/HRP20160789T1/hr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together

Definitions

  • the invention relates to a press frame structure for a transformer, in particular for a power transformer.
  • Electromagnetic alternating fields induce eddy currents in press frames and tension plates or tie rods of (power) transformers. This leads to a significant increase in additional losses and possibly thermal problems.
  • press frames made of non-magnetic steel.
  • Out DE 23 39 972 is a support and pressing device for magnetic cores and windings of transformers and inductors known.
  • Out JP 61099314 A a stationary induction apparatus is known.
  • the object of the invention is to reduce the unwanted eddy currents in a transformer and at the same time to provide new possibilities for the construction of power transformers, in particular press frame structures for power transformers.
  • This press frame structure provides additional degrees of freedom in the design of the transformer and allows a redistribution of forces from the edge of the core in an area outside the Windings. As a result, the magnetically active portion of the required Werpressplatten can be reduced at or near the core, which significantly reduces the resulting eddy currents losses and torque on the Ceipressplatten.
  • a press frame structure is proposed, e.g. not over the entire length of a transformer core rests.
  • the press frame structure nevertheless serves for the horizontal support of the transformer core, which is e.g. is constructed of core lamination packages.
  • the transformer core which is e.g. is constructed of core lamination packages.
  • the space around the transformer can be used, e.g. using struts to allow the cohesion required by the press frame structure.
  • the press frame structure comprises braces, so that the press frame structure (in particular the struts) magnetic field lines as small as possible cross-sectional areas in which eddy currents could be induced.
  • the shape of the press frame structure can be optimized so that a reduction of the additional losses is achieved.
  • starting points for an axial force transmission can be determined according to a mechanically favorable distribution, which results in that the torques on the press frame structure are reduced.
  • the height of the press frame structure can thus be reduced compared to the height of a known press frame, which has a favorable effect on the space required for the transformer.
  • struts are designed obliquely so that the magnetic flux is reduced by the strut, in particular minimal.
  • the geometry of the press frame structure can be optimized based on the respective dimensions of the individual scenario so that the eddy current losses are minimized or at least significantly reduced.
  • the struts are made of sheet metal.
  • the struts can also be made of plastic or carbon. Combinations of different materials are possible.
  • This (shortest) connection between the upper and the lower pressing frame also characterizes the axial direction described here.
  • tension elements connect the upper press frame of the transformer with the lower press frame of the transformer.
  • the tension elements are at least partially made of an electrically insulating material.
  • the Switzerlandpressplatten are at least partially made of an electrically insulating material.
  • One embodiment is that the Switzerlandpressplatten are at least partially disposed in a stray channel of the transformer.
  • the Switzerlandpressplatten are at least partially disposed in a space between windings of adjacent legs and in an area between the legs and a boiler wall of the transformer.
  • a next embodiment is that the Switzerlandpressplatten are at least partially disposed in the core of the transformer.
  • Fig.1 schematically shows a core 101 of a known transformer with a plurality of legs and a lower yoke in a mounting state (without already attached upper yoke).
  • the legs are provided with a bandage, the windings are not present in this state of assembly.
  • the transformer has upper and lower press frames 102 and a plurality of tensile press plates 103 connecting the upper and lower press frames 102.
  • the core 101 is preferably constructed of several layers of core sheet.
  • Fig.2 schematically shows a view of a known transformer from above, wherein the transformer, the core 101, the pressing frame 102 and the Glasruckplatten 103 similar Fig.1 having. Furthermore, in Fig.2 symbolically shown windings 201 of the transformer.
  • the in Fig.2 illustrated transformer comprises in contrast to the in Fig.1 shown transformer three legs and in the representation of Fig.2 are already schematically applied windings on the legs.
  • the in Fig.2 shown press frame 102 may be performed substantially continuously in the upper and lower regions of the transformer (see. Fig.1 ); Fig.2 here selects a symbolic cross-sectional representation to illustrate that in addition to the pressing frame 102 at certain intervals and approximately in each center of the winding 201 is a respective Zugressplatte 103 is arranged, which connects the pressing frame 102 at the upper and lower end of the transformer.
  • the press frame 102 provides the magnetic flux with a high cross-section, resulting in high losses.
  • Figure 3 shows one of Fig.1 and Fig.2 different, inventive press frame structure in a plan view with a plurality of tension members 302 and struts 301, which are arranged outside of, in particular next to or laterally offset to windings 201. Further shows Figure 3 a plurality of draft plates 304.
  • the tension members 302 and the draft plates 304 are respectively fixed in the upper portion of the transformer and in the lower portion of the transformer, so that the core is effectively axially fixed and the core sheets are held together.
  • the tension members 302 are at least partially connected to the Buchpressplatten 304.
  • the press frame structure provides the magnetic flux according to the embodiment according to Fig.2 significantly reduced cross-section, which causes a reduction in the losses due to eddy currents.
  • the press frame structure permits a redistribution of the axial forces from the edge of the core into an area outside the windings 201.
  • the tension elements 302 are also preferably connected to the upper and the lower press frame (not in FIG Figure 3 shown) fixed.
  • the tension members 302 as well as the Wernerplatten 304 extend axially along the transformer and in particular at the top and bottom of the transformer (eg on the press frame) fixed.
  • the tension members 302 may be suspended below and bolted to the top of the transformer.
  • the required axial force holding the windings 201 of the transformer together is determined according to FIG Figure 3 on the Glaspressplatten 304, the tension members 302 and the struts 301 distributed.
  • such a construction is dimensioned such that the core and the windings 201 (at least) held together with the same forces as in a conventional press frame structure.
  • the proposed approach ensures the required mechanical stability and on the other hand reduces the proportion of Wernerplatten 304 in the core cross-section. This results in less losses in the Werpressplatten 304. Furthermore, the volume of the core can be reduced, which has a beneficial effect on the cost of the transformer. Also, thus the torque is reduced to the Werpressplatten 304.
  • these Buchpressplatten 304 may have a lower mechanical strength, since they can also be used in places of the transformer, which are unfavorable for electrically conductive Wegpressplatten 304 and thus more space for Wegpressplatten 304 is available.
  • the axial forces pre-pressing force, short-circuit forces
  • the tension members 302 e.g. in the form of Switzerlandpressplatten, are made of electrically insulating material axially in the windings or wrapped, located in a stray channel and / or located in a space between windings of adjacent legs and in an area between the legs and a boiler wall of the transformer.
  • the transformer is located inside a boiler, which is filled eg with a liquid.
  • the (main) leakage channel corresponds to a gap between two windings, e.g. a primary and a secondary winding or an upper and an undervoltage.
  • a transformer has more than two windings, there can be multiple stray channels.
  • modified strips in layer windings, stray channel, winding gaps can be designed as insulating tension elements.
  • tension elements may be arranged in the core volume of the transformer core itself.
  • the upper and lower press frames can each be made largely conventionally. However, the losses in the pressing frame can be almost completely avoided: The favorable distribution of the axial pressure over a plurality of insulating tension elements can be achieved at the same time a volume optimization of the upper and lower pressing frame.
  • tension elements made of electrically insulating material thus enables a reduction of the power loss in the press frame and allows to maintain the mechanical stability of the press frame at the same time.
  • the tension elements of electrically insulating material in the example of Fig.2 be arranged or incorporated almost anywhere in an area 401.
  • the use of the insulating material for the tension elements results in additional degrees of freedom in the design of the transformer;
  • the Switzerlandpressplatten 103 can be completely replaced by Switzerlandpressplatten of electrically insulating material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Coils Or Transformers For Communication (AREA)

Claims (12)

  1. Structure de cadre de serrage pour un transformateur
    - comprenant plusieurs éléments (302 ) de traction,
    - comprenant un cadre de serrage inférieur et un cadre de serrage supérieur, ainsi que plusieurs plaques ( 304 ) de serrage de traction, qui relient le cadre de serrage supérieur et le cadre de serrage inférieur,
    - dans laquelle les éléments ( 302 ) de traction et les plaques ( 304 ) de serrage de traction peuvent être immobilisés en haut et en bas sur le transformateur,
    - comprenant plusieurs entretoises ( 301 ) qui peuvent être réalisées au moins en partie en s'éloignant de manière inclinée d'un noyau du transformateur,
    - dans laquelle les plusieurs plaques ( 304 ) de serrage de traction peuvent être mises sur ou au voisinage du noyau du transformateur,
    - dans laquelle les éléments ( 302 ) de traction peuvent être mis à l'extérieur d'enroulements ( 201 ) du transformateur,
    - dans laquelle, à l'aide des entretoises ( 301 ), les éléments ( 302 ) de traction sont reliés au moins en partie aux plaques ( 304 ) de serrage de traction,
    - dans laquelle les éléments ( 302 ) de traction et les plaques ( 304 ) de serrage de traction peuvent être disposés axialement le long du transformateur et peuvent être immobilisés sur celui-ci.
  2. Structure de cadre de serrage suivant la revendication 1, dans laquelle les entretoises sont inclinées de manière à ce que le flux magnétique d'un transformateur soit réduit par l'entretoise ( 301 ).
  3. Structure de cadre de serrage suivant l'une des revendications précédentes, dans laquelle les entretoises ( 301 ) sont en tôle.
  4. Structure de cadre de serrage suivant l'une des revendications précédentes, dans laquelle les plaques ( 304 ) de serrage de traction relient le cadre de serrage supérieur au cadre de serrage inférieur.
  5. Structure de cadre de serrage suivant la revendication 4, dans laquelle les éléments ( 302 ) de traction relient le cadre de serrage supérieur au cadre de serrage inférieur.
  6. Structure de cadre de serrage suivant l'une des revendications précédentes, dans laquelle les éléments ( 302 ) de traction sont au moins en partie en un matériau isolant du point de vue électrique.
  7. Structure de cadre de serrage suivant l'une des revendications précédentes, dans laquelle les éléments ( 302 ) de traction et les plaques ( 304 ) de serrage de traction peuvent être immobilisées respectivement dans la partie supérieure et dans la partie inférieure du transformateur, notamment sur la structure de cadre de serrage.
  8. Structure de cadre de serrage suivant l'une des revendications précédentes, dans laquelle les plaques ( 304 ) de serrage de traction sont au moins en partie en un matériau isolant du point de vue électrique.
  9. Structure de cadre de serrage suivant la revendication 8, dans laquelle les plaques ( 304 ) de serrage de traction peuvent être mises au moins en partie dans des enroulements.
  10. Structure de cadre de serrage suivant l'une des revendications 8 ou 9, dans laquelle les plaques ( 304 ) de serrage de traction peuvent être mises au moins en partie dans un canal de dispersion du transformateur.
  11. Structure de cadre de serrage suivant l'une des revendications 8 à 10, dans laquelle les plaques ( 304 ) de serrage de traction peuvent être mises au moins en partie dans un espace entre des enroulements ( 201 ) de branches voisines et dans une partie entre les branches et une paroi de cuve du transformateur.
  12. Structure de cadre de serrage suivant l'une des revendications 8 à 11, dans laquelle les plaques ( 304 ) de serrage de traction peuvent être disposées au moins en partie dans le noyau du transformateur.
EP12756002.7A 2011-09-27 2012-09-04 Structure de cadre de serrage pour transformateur Active EP2735005B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
HRP20160789TT HRP20160789T1 (hr) 2011-09-27 2016-07-05 Tlačna okvirna konstrukcija za transformator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011083521A DE102011083521A1 (de) 2011-09-27 2011-09-27 Pressrahmenstruktur für Transformator
PCT/EP2012/067204 WO2013045228A1 (fr) 2011-09-27 2012-09-04 Structure de cadre de serrage pour transformateur

Publications (2)

Publication Number Publication Date
EP2735005A1 EP2735005A1 (fr) 2014-05-28
EP2735005B1 true EP2735005B1 (fr) 2016-04-06

Family

ID=46800202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12756002.7A Active EP2735005B1 (fr) 2011-09-27 2012-09-04 Structure de cadre de serrage pour transformateur

Country Status (7)

Country Link
EP (1) EP2735005B1 (fr)
KR (1) KR101517741B1 (fr)
CN (1) CN103827995B (fr)
DE (1) DE102011083521A1 (fr)
HR (1) HRP20160789T1 (fr)
PL (1) PL2735005T3 (fr)
WO (1) WO2013045228A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104465068A (zh) * 2014-12-09 2015-03-25 吴江变压器有限公司 一种变压器线圈防反弹压紧工装
PT3503134T (pt) 2017-12-20 2020-05-06 Ehmann Bertram Dispositivo de suporte para suporte do núcleo empilhado de um transformador magneticamente macio e transformador
CN116348975A (zh) * 2020-10-26 2023-06-27 西门子能源国际公司 用于减小变压器的窗口中的循环电流的补偿结构和包括补偿结构的变压器

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2431950A (en) * 1944-01-26 1947-12-02 Jefferson Electric Co Core construction for electromagnetic apparatus
DE1233484B (de) * 1960-04-22 1967-02-02 Elin Union Ag Vorrichtung zur Jochpressung fuer Transformatoren mit geschichtetem Eisenkern
DE1162946B (de) * 1960-11-29 1964-02-13 Licentia Gmbh Haltevorrichtung fuer geblechte Kerne von Grosstransformatoren od. dgl.
DE1218606B (de) * 1961-08-25 1966-06-08 Cie Generale D Electricite Soc Transformator oder Drosselspule grosser Leistung
CH417760A (de) * 1964-12-10 1966-07-31 Oerlikon Maschf Wicklung, insbesondere für Grosstransformatoren
CH560453A5 (fr) * 1973-06-25 1975-03-27 Bbc Brown Boveri & Cie
JPS6199314A (ja) * 1984-10-22 1986-05-17 Toshiba Corp 静止誘導電器
DD257896A1 (de) * 1987-02-25 1988-06-29 Transform Roentgen Matern Veb Vorrichtung zum axialen verspannen von spulenbloecken
DE8810040U1 (fr) * 1987-09-15 1989-01-12 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
WO2000002211A1 (fr) * 1998-07-02 2000-01-13 Siemens Aktiengesellschaft Composant a induction presentant un noyau
KR200352342Y1 (ko) 2004-03-16 2004-06-04 박동석 변압기용 코일 프레임
CN201289779Y (zh) * 2008-08-27 2009-08-12 保定天威集团有限公司 一种大型电力变压器铁芯拉板
CN201397727Y (zh) * 2009-05-21 2010-02-03 张鑫 变压器铁芯的夹紧结构
KR200451057Y1 (ko) 2010-06-14 2010-11-22 주식회사 케이피 일렉트릭 변압기용 코어 고정장치

Also Published As

Publication number Publication date
WO2013045228A1 (fr) 2013-04-04
EP2735005A1 (fr) 2014-05-28
KR101517741B1 (ko) 2015-05-04
HRP20160789T1 (hr) 2016-08-12
CN103827995B (zh) 2016-08-24
KR20140050746A (ko) 2014-04-29
PL2735005T3 (pl) 2016-10-31
CN103827995A (zh) 2014-05-28
DE102011083521A1 (de) 2013-03-28

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