EP1133779B1 - Transformator - insbesondere giessharztransformator - Google Patents
Transformator - insbesondere giessharztransformator Download PDFInfo
- 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
Links
Images
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)
Description
- FIG 1
- einen Trockentransformator mit in Giessharz eingegossener Wicklung in perspektivischer Darstellung und einem aufgeschnittenen Wicklungssatz und
- FIG 2
- eine Einzelheit bei X in sehr stark vergrößertem Maßstab.
Claims (7)
- Transformator, insbesondere Giessharztransformator, mit Luftkühlung und mit einer Oberspannungswicklung (3) aus einer Vielzahl von elektrisch in Reihe geschalteten, räumlich übereinander liegenden Spulen (16) mit Kunststofffolie (18) als Windungsisolierung,
dadurch gekennzeichnet, daß abgestimmt auf die jeweilige thermische Belastung der obersten und der untersten Spule (16) im Betrieb die Kunststofffolie (18) innerhalb der obersten Spule (16) thermisch fester ist als die Kunststofffolie (18) in der untersten Spule (16). - Tansformator nach Anspruch 1,
dadurch gekennzeichnet, daß die thermische Festigkeit der Kunststofffolie (18) innerhalb der Oberspannungswicklung (3) von der untersten bis zur obersten Spule (16) gestuft zunimmt. - Transformator nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Kunststofffolien (18) unterschiedlicher thermischer Festigkeit aus unterschiedlichen Werkstoffen bestehen und die gleichen Abmessungen aufweisen. - Transformator nach Anspruch 2 oder 3,
dadurch gekennzeichnet, daß die der obersten Spule (19) benachbarten Spulen (19) Kunststofffolien (18) mit denselben thermischen Festigkeiten wie die oberste Spule (19) aufweisen und daß die der untersten Spule (19) benachbarten Spulen (19) Kunststofffolien (18) mit denselben thermischen Festigkeiten wie die unterste Spule (19) aufweisen. - Transformator nach Anspruch 4,
dadurch gekennzeichnet, daß die im mittleren Bereich der Oberspannungswicklung (3) angeordneten Spulen (16) jeweils mit einer Kunststofffolie (18) isoliert sind, deren thermische Festigkeit zwischen denen der Kunststofffolien (18) im oberen und im unteren Teil der Oberspannungswicklung liegen. - Transformator nach einem der Ansprüche 4 oder 5,
dadurch gekennzeichnet, daß Spulen (16) mit Kunststofffolie (18) gleicher thermischer Festsigkeit in einem gemeinsamen Giessharzblock eingeschlossen sind. - Transformator nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß mindestens eine der Kunststofffolien (18) zweischichtig ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19854439A DE19854439C2 (de) | 1998-11-25 | 1998-11-25 | Transformator - insbesondere Giessharztransformator |
DE19854439 | 1998-11-25 | ||
PCT/DE1999/003766 WO2000031761A1 (de) | 1998-11-25 | 1999-11-24 | Transformator - insbesondere giessharztransformator |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1133779A1 EP1133779A1 (de) | 2001-09-19 |
EP1133779B1 true EP1133779B1 (de) | 2005-03-16 |
Family
ID=7889022
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99962087A Expired - Lifetime EP1133779B1 (de) | 1998-11-25 | 1999-11-24 | Transformator - insbesondere giessharztransformator |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1133779B1 (de) |
DE (2) | DE19854439C2 (de) |
WO (1) | WO2000031761A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3144944A1 (de) | 2015-09-18 | 2017-03-22 | Siemens Aktiengesellschaft | Elektrische wicklung, trockentransformator mit einer solchen elektrischen wicklung und verfahren zur herstellung einer elektrischen wicklung |
DE102016202385A1 (de) | 2016-02-17 | 2017-08-17 | Siemens Aktiengesellschaft | Kompakter Trockentransformator mit einer elektrischen Wicklung und Verfahren zur Herstellung einer elektrischen Wicklung |
WO2017140482A1 (de) | 2016-02-17 | 2017-08-24 | Siemens Aktiengesellschaft | Kompakter trockentransformator mit einer elektrischen wicklung und verfahren zur herstellung einer elektrischen wicklung |
Families Citing this family (8)
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)
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 (de) * | 1986-08-29 | 1988-05-04 | Siemens Aktiengesellschaft | Transformator mit Luftkühlung |
SE510451C2 (sv) * | 1997-02-03 | 1999-05-25 | Asea Brown Boveri | Krafttransformator eller reaktor |
-
1998
- 1998-11-25 DE DE19854439A patent/DE19854439C2/de not_active Expired - Fee Related
-
1999
- 1999-11-24 DE DE59911772T patent/DE59911772D1/de not_active Expired - Lifetime
- 1999-11-24 WO PCT/DE1999/003766 patent/WO2000031761A1/de active IP Right Grant
- 1999-11-24 EP EP99962087A patent/EP1133779B1/de not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3144944A1 (de) | 2015-09-18 | 2017-03-22 | Siemens Aktiengesellschaft | Elektrische wicklung, trockentransformator mit einer solchen elektrischen wicklung und verfahren zur herstellung einer elektrischen wicklung |
DE102016202385A1 (de) | 2016-02-17 | 2017-08-17 | Siemens Aktiengesellschaft | Kompakter Trockentransformator mit einer elektrischen Wicklung und Verfahren zur Herstellung einer elektrischen Wicklung |
WO2017140482A1 (de) | 2016-02-17 | 2017-08-24 | Siemens Aktiengesellschaft | Kompakter trockentransformator mit einer elektrischen wicklung und verfahren zur herstellung einer elektrischen wicklung |
WO2017140577A1 (de) | 2016-02-17 | 2017-08-24 | Siemens Aktiengesellschaft | Kompakter trockentransformator mit einer elektrischen wicklung und verfahren zur herstellung einer elektrischen wicklung |
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 |
---|---|
WO2000031761A1 (de) | 2000-06-02 |
DE59911772D1 (de) | 2005-04-21 |
EP1133779A1 (de) | 2001-09-19 |
DE19854439A1 (de) | 2000-06-15 |
DE19854439C2 (de) | 2000-10-12 |
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