EP1133779B1 - Transformateur, notamment transformateur en resine moulee - Google Patents

Transformateur, notamment transformateur en resine moulee Download PDF

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Publication number
EP1133779B1
EP1133779B1 EP99962087A EP99962087A EP1133779B1 EP 1133779 B1 EP1133779 B1 EP 1133779B1 EP 99962087 A EP99962087 A EP 99962087A EP 99962087 A EP99962087 A EP 99962087A EP 1133779 B1 EP1133779 B1 EP 1133779B1
Authority
EP
European Patent Office
Prior art keywords
coil
coils
plastic film
transformer
voltage 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.)
Expired - Lifetime
Application number
EP99962087A
Other languages
German (de)
English (en)
Other versions
EP1133779A1 (fr
Inventor
Rudolf Dedelmahr
Friedrich Alber
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 EP1133779A1 publication Critical patent/EP1133779A1/fr
Application granted granted Critical
Publication of EP1133779B1 publication Critical patent/EP1133779B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/327—Encapsulating or impregnating
    • 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
    • H01F27/323—Insulation between winding turns, between winding layers

Definitions

  • the invention relates to a transformer, in particular Cast resin transformer, with air cooling and with a high-voltage winding from a variety of electric in series switched, spatially superimposed coils with Plastic film as a winding isolation.
  • Air-cooled transformers have been spreading recently used because they are an excellent active and passive Behavior in case of fire. That's especially true on transformers whose windings are cast in resin blocks are included, due to their high filler content practically not flammable.
  • the air cooling has relatively high temperatures both in the individual turns as well as in the winding overall result, because the plastic films and the casting resin have a relatively low thermal conductivity.
  • it is also the heat transfer of casting resin and the coolant Air orders of magnitude lower than that of a coolant.
  • Another disadvantage is given by the fact that even within the winding itself a relatively large Temperature gradient occurs, especially the temperature in the upper range of the winding is significantly higher than in the lower area. As a result, for mutual isolation the turns in the coils of the winding very high quality and accordingly used expensive plastic films become.
  • the invention is therefore based on the object, the effort for winding insulation, especially in the high-voltage winding from air-cooled transformers.
  • This object is achieved in that tuned on the respective thermal load of the uppermost and the lowermost spool in operation, the plastic film within the uppermost coil is thermally stronger than the plastic film in the lowest coil.
  • the thermal strength of the plastic film decreases within the high voltage winding from the lowest to stepped to the top coil too.
  • plastic films of different thermal strength made of different materials and have the same dimensions on.
  • those of the uppermost Coil adjacent coils plastic films with the same thermal strengths like the top coil on and the the lowest coil adjacent coils have plastic films with the same thermal strengths as the lowest Coil on.
  • Preferred dimensions are those in the middle region of the high-voltage winding arranged coils each with a plastic film insulated, whose thermal resistance between those the plastic films in the upper and in the lower part of the High voltage winding lie.
  • At least one of the plastic films used two layers.
  • executed dry-type transformers are very advantageous, because they are closer to actually be considered thermal loads are adaptable, so that an oversizing thermal resistance is avoidable, without special manufacturing facilities, such as new molds are required.
  • a three-legged iron core wears on each of its core thighs 1 a winding set of one low-voltage winding 2 and a high voltage winding 3.
  • the core legs 1 are through a lower yoke 4 and an upper yoke. 5 connected with each other.
  • the core thighs 1 are just like the Joches 4 and 5 made of approx. 0.35 mm thick transformer plate lamellae layered.
  • the core legs 1 are made of bandages. 6 compressed. In this case, the bandages 6 include simultaneously Glasdeckplatten 7 of which one each at the front and rear each of the core legs 1 is applied.
  • the Switzerlanddeckplatten 7 serve the inclusion of thigh-parallel tensile forces and are hung in side member 8, of which two each the upper or the lower yoke 5 and 4 by bolts 11 transversely to the Compress layer planes.
  • the lower side members 8 resting on cross members 9 of a chassis with rollers 10.
  • the cast in casting resin undervoltage windings 2 and High-voltage windings 3 are based on blocks 12 with a elastic support on the side rails 8 from. By the elastic pad are the iron core and the windings decoupled from each other by vibration mechanics.
  • the high voltage windings 3 are electrically connected via couplings 13 in the triangle interconnected and via terminal lugs 14 to a medium voltage network connected.
  • the high-voltage winding 3 is composed of coils 16, the coil-wide metal strip 17 (FIG 2), for example made of aluminum, being wound, being used for electrical Insulation between superposed turns at least a plastic film 18 is located.
  • the plastic film 18 on the one hand, for economic reasons, is as thin as possible, but on the other hand, a secure Windungsisol ist guarantee.
  • the transformer In operation, the transformer is characterized by the occurring in it Losses heated up, which are converted into heat. This heat is dissipated to the outside and in from the air the environment. The heated air rises above and below, cooler air flows, so that a at the transformer from bottom to top moving cooling air flow forms. As a result, the bottom of the high-voltage winding 3 lying coils 16 of cool air and the above in the high-voltage winding 3 lying coils 16 of cooled already heated air, so that the overhead Coils 16 reach a higher end temperature for their thermal resistance must be designed. The thermal strength of the metal strip 17 is doing in nominal operation far from achieved. In contrast, the aforementioned final temperature in the field of thermal resistance of the plastic film 18, to which high demands are made which often only meet special and expensive films.
  • the thermal load of the lowest and determined top coil and for the top and her after below coil 16 a plastic film 18 with a oriented high thermal strength used As tests have shown, the temperature rises in the high-voltage winding 3 starting from the lowest coil 16 linear to the top coil 16 at. So far in all Coils 16 a winding, the same plastic film 18 used was, this was in the majority of the high-voltage winding 3 oversized. According to the invention will now proposed, for the lower coil 16 a plastic film Use 18 with a lower thermal resistance than in the upper coils 16. With regard to the temperature distribution For example, it is sufficient for the coils 16 in the lower half of the high-voltage winding 3, when the thermal Strength for the mean of each for the lowest and temperature determined for the uppermost coil becomes.
  • Plastic films 18 have regardless of their thermal Strength the same dimensions. To avoid Confusions of plastic films 18, these are by a Identification thread or a label is marked. Besides, it is appropriate. Coils 16 with the same plastic films, respectively pour into the same casting resin block. In each case the highest expected for a coil 16 in a Giessharzblock End temperature determined and accordingly a Plastic film 18 with the required thermal resistance used. As a result, especially with large air-cooled Transformers with distribution of high-voltage winding 3 in three or more cast resin blocks considerable economic Benefits achieved.

Landscapes

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

Claims (7)

  1. Transformateur, notamment transformateur à imprégnation par de la résine, comprenant un refroidissement par de l'air et un enroulement (3) primaire constitué d'une pluralité de bobines (16) montées électriquement en série, superposées dans l'espace et ayant une feuille (18) de matière plastique comme isolant de spire,
       caractérisé en ce que, d'une manière adaptée à la charge thermique respective de la bobine (16) la plus haute et de la bobine (16) la plus basse en fonctionnement, la feuille (18) de matière plastique dans la bobine (16) la plus haute est thermiquement plus résistante que la feuille (18) de matière plastique dans la bobine (16) la plus basse.
  2. Transformateur suivant la revendication 1,
       caractérisé en ce que la résistance thermique de la feuille (18) de matière plastique dans l'enroulement (3) primaire augmente par palier de la bobine (16) la plus basse à la bobine (16) la plus haute.
  3. Transformateur suivant la revendication 1 ou 2,
       caractérisé en ce que les feuilles (18) de matière plastique de résistance thermique différente sont en des matériaux différents et ont les mêmes dimensions.
  4. Transformateur suivant la revendication 2 ou 3,
       caractérisé en ce que les bobines (19) voisines de la bobine (19) la plus haute ont des feuilles (18) en matière plastique ayant les mêmes résistances thermiques que celle de la bobine (19) la plus haute et en ce que les bobines (19) voisines de la bobine (19) la plus basse ont des feuilles (18) en matière plastique ayant les mêmes résistances thermiques que celle de la bobine (19) la plus basse.
  5. Transformateur suivant la revendication 4,
       caractérisé en ce que les bobines (16) disposées dans la zone médiane de l'enroulement (3) primaire sont isolées respectivement par une feuille (18) de matière plastique, dont la résistance thermique est comprise entre celles des feuilles (18) de matière plastique de la partie supérieure et de la partie inférieure de l'enroulement primaire.
  6. Transformateur suivant l'une des revendications 4 ou 5,
       caractérisé en ce que les bobines (16) ayant une feuille (18) de matière plastique de même résistance thermique sont incorporées dans un bloc commun de résine d'imprégnation.
  7. Transformateur suivant l'une des revendications 1 à 6,
       caractérisé en ce qu'au moins l'une des feuilles (18) de matière plastique est à deux couches.
EP99962087A 1998-11-25 1999-11-24 Transformateur, notamment transformateur en resine moulee Expired - Lifetime EP1133779B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19854439 1998-11-25
DE19854439A DE19854439C2 (de) 1998-11-25 1998-11-25 Transformator - insbesondere Giessharztransformator
PCT/DE1999/003766 WO2000031761A1 (fr) 1998-11-25 1999-11-24 Transformateur, notamment transformateur en resine moulee

Publications (2)

Publication Number Publication Date
EP1133779A1 EP1133779A1 (fr) 2001-09-19
EP1133779B1 true EP1133779B1 (fr) 2005-03-16

Family

ID=7889022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99962087A Expired - Lifetime EP1133779B1 (fr) 1998-11-25 1999-11-24 Transformateur, notamment transformateur en resine moulee

Country Status (3)

Country Link
EP (1) EP1133779B1 (fr)
DE (2) DE19854439C2 (fr)
WO (1) WO2000031761A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3144944A1 (fr) 2015-09-18 2017-03-22 Siemens Aktiengesellschaft Bobine electrique, transformateur sec dote d'une telle bobine electrique et procede de fabrication d'une bobine electrique
DE102016202385A1 (de) 2016-02-17 2017-08-17 Siemens Aktiengesellschaft Kompakter Trockentransformator mit einer elektrischen Wicklung und Verfahren zur Herstellung einer elektrischen Wicklung
WO2017140482A1 (fr) 2016-02-17 2017-08-24 Siemens Aktiengesellschaft Transformateur sec compact doté d'un enroulement électrique et procédé de réalisation d'un enroulement électrique

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10120236C1 (de) * 2001-04-19 2003-01-30 Siemens Ag Elektrische Wicklungsanordnung
DE10148946C2 (de) * 2001-09-28 2003-09-04 Siemens Ag Elektrische Wicklungsanordnung
DE10157591A1 (de) 2001-11-23 2003-06-05 Abb T & D Tech Ltd Wicklung für einen Transformator oder eine Spule
ITMI20050711A1 (it) * 2005-04-21 2006-10-22 Tmc Italia S P A Trasformatore a secco isolato in resina
DE102005058119B4 (de) * 2005-11-29 2008-01-10 Siemens Ag Fixiervorrichtung für eine elektrische Wicklung
DE102008055882A1 (de) * 2008-11-03 2010-05-06 Siemens Aktiengesellschaft Haltevorrichtung für eine Gießharztransformatoren-Wicklung
CN102903491A (zh) * 2012-10-29 2013-01-30 常熟市森源电气科技有限公司 小容量环氧树脂浇注干式变压器
KR102045895B1 (ko) 2015-06-18 2019-11-18 엘에스산전 주식회사 변압기의 냉각장치

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2554904C3 (de) * 1975-12-06 1981-11-19 Felten & Guilleaume Carlswerk AG, 5000 Köln Wassergekühltes Hochspannungsenergiekabel
JPS5915369B2 (ja) * 1978-12-26 1984-04-09 鐘淵化学工業株式会社 自己支持型コイルの製造方法
DE3212060A1 (de) * 1982-04-01 1983-10-06 Aeg Isolier Kunststoff Flaechenisolierstoff fuer wicklungen aus aluminiumfolien, insbesondere fuer trockentransformatoren der temperaturklassen f und h
DE3229480A1 (de) * 1982-08-06 1984-02-09 Transformatoren Union Ag, 7000 Stuttgart Trockentransformator mit in giessharz eingegossenen wicklungen
JPS59151409A (ja) * 1983-02-18 1984-08-29 Hitachi Ltd モ−ルドコイル
CH664041A5 (de) * 1984-02-08 1988-01-29 Micafil Ag Verfahren zur lagenweisen wicklung von spulen fuer elektrische geraete.
DE3539737A1 (de) * 1985-11-08 1987-05-21 Transformatoren Union Ag Wicklung fuer transformatoren und drosselspulen
EP0265612A1 (fr) * 1986-08-29 1988-05-04 Siemens Aktiengesellschaft Transformateur à refroidissement par air
SE510451C2 (sv) * 1997-02-03 1999-05-25 Asea Brown Boveri Krafttransformator eller reaktor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3144944A1 (fr) 2015-09-18 2017-03-22 Siemens Aktiengesellschaft Bobine electrique, transformateur sec dote d'une telle bobine electrique et procede de fabrication d'une bobine electrique
DE102016202385A1 (de) 2016-02-17 2017-08-17 Siemens Aktiengesellschaft Kompakter Trockentransformator mit einer elektrischen Wicklung und Verfahren zur Herstellung einer elektrischen Wicklung
WO2017140577A1 (fr) 2016-02-17 2017-08-24 Siemens Aktiengesellschaft Transformateur sec compact doté d'un enroulement électrique et procédé de réalisation d'un enroulement électrique
WO2017140482A1 (fr) 2016-02-17 2017-08-24 Siemens Aktiengesellschaft Transformateur sec compact doté d'un enroulement électrique et procédé de réalisation d'un enroulement électrique
DE102016202391A1 (de) 2016-02-17 2017-08-31 Siemens Aktiengesellschaft Kompakter Trockentransformator mit einer elektrischen Wicklung und Verfahren zur Herstellung einer elektrischen Wicklung
US11532429B2 (en) 2016-02-17 2022-12-20 Siemens Energy Global GmbH & Co. KG Dry-type transformer
US11569026B2 (en) 2016-02-17 2023-01-31 Siemens Energy Global GmbH & Co. KG Compact dry-type transformer

Also Published As

Publication number Publication date
DE59911772D1 (de) 2005-04-21
DE19854439A1 (de) 2000-06-15
DE19854439C2 (de) 2000-10-12
WO2000031761A1 (fr) 2000-06-02
EP1133779A1 (fr) 2001-09-19

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