EP2856477B1 - Cuve pour transformateurs ou bobines d'arrêt remplis de liquide - Google Patents

Cuve pour transformateurs ou bobines d'arrêt remplis de liquide Download PDF

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Publication number
EP2856477B1
EP2856477B1 EP12725774.9A EP12725774A EP2856477B1 EP 2856477 B1 EP2856477 B1 EP 2856477B1 EP 12725774 A EP12725774 A EP 12725774A EP 2856477 B1 EP2856477 B1 EP 2856477B1
Authority
EP
European Patent Office
Prior art keywords
boiler
casing
tank
plastic
shell
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
EP12725774.9A
Other languages
German (de)
English (en)
Other versions
EP2856477A1 (fr
Inventor
Friedrich AMETZBERGER
Anton HOLZER
Helmut Pregartner
Horst RECHBERGER
Harald SCHOBER
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 EP2856477A1 publication Critical patent/EP2856477A1/fr
Application granted granted Critical
Publication of EP2856477B1 publication Critical patent/EP2856477B1/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
    • H01F27/08—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
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid 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
    • H01F27/02—Casings
    • H01F27/025—Constructional details relating to 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
    • H01F27/33—Arrangements for noise damping

Definitions

  • the present invention relates to a boiler for a liquid-cooled transformer or choke, as used in power supply networks.
  • Electrical transformers or chokes as used in power grids, usually consist of a magnetic core with electrical windings, which are enclosed in a boiler, which is filled with oil for the purpose of cooling.
  • the disadvantage here is that when operating the transformer or throttle, the magnetic core by magnetostriction and also acting on the individual conductors of the wind forces the surrounding oil to vibrate. These vibrations propagate in the cooling medium and stimulate the boiler wall to an unwanted sound radiation.
  • the document EP 0 073 401 A1 describes a boiler for large power transformers.
  • the KESSEL has an outer and inner boiler wall made of metal.
  • a compressible intermediate layer is arranged over a large area for the purpose of reducing the sound radiation, which is supported on the boiler walls.
  • an airborne sounding elastic transformer wall is proposed, which is formed by the fact that outside of the metallic wall, a polyurethane foam is sprayed or mounted in the form of plates.
  • Granular materials for example steel particles or quartz sand, are added to the polyurethane foam to adjust the damping.
  • the disadvantage here is that the sprayed plastic is exposed to the environment unprotected.
  • sandwich plate systems are known with which the rigidity and strength of a metallic structure can be increased by spraying an uncured plastic material between two metal layers, which is suitable after curing. Shear forces between the metal layers transferred to.
  • a structural laminate also referred to as a sandwich plate system (SPS) is, for example, in WO 2003/101728 . WO 01/32414 . WO 99/058 333 described.
  • Advantageous embodiments of the invention are defined in the respective dependent claims.
  • a steel-plastic-steel sandwich construction known per se is used for the production of a double-walled boiler.
  • the arranged between the two boiler walls plastic is dimensioned in its properties so that on the one hand the line of structure-borne noise is inhibited from the interior of the boiler in the outer space. If, during operation, the active part, that is, the soft magnetic core and the electrical windings thereon, stimulate the insulating liquid to vibrate, these vibrations reach only weakened to the outer vessel wall. The noise emission of a transformer or a choke is thereby reduced.
  • connection between plastic and metallic shell wall is designed so that shear forces can be transmitted between the inner and outer shell wall.
  • the sandwich construction also assumes a supporting function. The consequence of this is that stiffeners are made smaller and take up less space. Despite the sound insulation, there is no increase in the external dimensions. Since the otherwise usually required inner stiffeners can be made smaller, also increases the usable clear boiler width. For internals is therefore more space available. Another advantage is that the boiler can be made lighter overall.
  • a suitable plastic in a liquid (not yet cured) state by injection openings, which are provided on the inner and / or outer shell boiler sprayed.
  • corresponding outlet openings are provided.
  • the thus introduced between the walls of the double-walled boiler plastic acts in a cured state in an analogous manner as a box-carrier or an I-beam. It adheres to the inner surfaces of the walls so strongly that shearing forces can be transmitted and thus contributes to the mechanical stability of the boiler as a whole.
  • the inner shell of the shell has a thickness which is smaller than the thickness of the outer shell of the shell.
  • the body sound conduction can be very well inhibited if the distance between the inner surfaces of the inner and outer shell of the boiler is in a range of about 5 mm to 50 mm.
  • Particularly preferred in a power transformer or a power choke is a thickness of the plastic or polymer material of about 30 mm.
  • the waste heat generated during operation is dissipated to a large extent by the insulating liquid (eg transformer insulating liquid) in the outer space, the insulating property of the plastic between the transformations of the boiler is disadvantageous.
  • the plastic or polymer material of the sandwich construction thermally conductive additives or similar acting filler are mixed. This may also be advantageous if embedded in the plastic between a layer Cooling line is housed, which is integrated into the cooling system of the transformer or the throttle.
  • the boiler is characterized in that the inner shell of the shell is formed of substantially flush abutting metal plates, the metal plates being welded by welding to strips or other spacers, which in turn are welded to the inner surface of the outer shell of the shell.
  • This embodiment is particularly preferred in the manufacture of power transformers. For smaller power it can also be advantageous if the inner boiler is made in one piece and is introduced as a kind of insert in the pot-shaped outer boiler.
  • FIG. 1 shows a boiler 1 whose shell is constructed in the manner of a double-wall boiler.
  • the two double walls 2, 5 are formed by an outer shell shell 2 and an inner shell shell 5, which are arranged at a distance 4 from each other. Between these two jackets 2, 5 is a circumferential gap 6, which is filled according to the invention with a plastic or polymer material 7.
  • the outer shell shell 2 continues downwards tapering to a bottom part 3.
  • the bottom part 3 rests on elastic supports 19 on a foundation.
  • the electrical connections 23 (bushings) are arranged. Before the transformer / throttle is put into operation, a negative pressure is generated in the interior 9 in the usual way.
  • To increase the mechanical stability of the boiler under vacuum ensure there are different stiffeners inside and outside of the boiler, of which in the FIG.
  • stiffeners 16 For clarity, only externally arranged stiffeners 16 are shown.
  • the stiffeners 16 run around the top and bottom of the boiler shell.
  • the interior 9 of the boiler 1 is filled with an insulating liquid (transformer oil) 24.
  • the insulating liquid 24 surrounds an arranged in the interior 9 active part 10.
  • This active part is in a transformer and a choke of a soft magnetic core around which an electric winding is wound.
  • the active part 10 is in the drawing of FIG. 1 for the sake of clarity not shown in detail.
  • the magnetic core When operating a transformer or a throttle, the magnetic core is known to be excited by magnetostriction to vibrate. These vibrations propagate on the insulating liquid 24.
  • the conductors of the electrical winding are excited in the case of operation to vibrations, which also affect the surrounding insulating liquid.
  • the insulating liquid 24 sound waves are formed, which also impinge on the inner jacket 5.
  • a plastic with a property is now provided in the intermediate space 6, which acts on the propagation of structure-borne noise to the outer shell 2 inhibiting. As a result, the vibration excitation of the outer shell 2 is lower and the noise emission is reduced.
  • FIG. 2 shows the inner boiler shell 5 in a perspective view.
  • the inner jacket 5 is formed in each case by opposing longitudinal and end sides. Each of these sides is composed of individual metal plates 18, which at joints show each other butt. They are flush with each other and each form a flat side surface or end face. As explained in more detail below, in the production of the boiler according to the invention, these metal plates 18 on strips 17 (see FIG. 4 ) welded to an inner surface 14 of the outer shell 2 of the boiler. On an end face an access hatch 26 can be seen in a assembled state of the boiler with a hatch cover 20 is closed ( FIG. 5 ). The delimitation of the interspace of FIG. 6 between the inner and outer boiler shells 2, 5 takes place by means of a terminating strip 20.
  • FIG. 3 shows the detail "X" of the FIG. 1 in an enlarged sectional view.
  • the outer shell wall 2 has a shell thickness 12 which is greater than the shell thickness 11 of the inner vessel wall 5.
  • the adhesion of the plastic 7 to the inner surfaces 13 and 14 and its physical property is such that a shearing force between the two walls. 5 and 2 can be transmitted.
  • the metal-plastic composite contributes to mechanical stability and it is possible that the stiffener 16, which prevents implosion of the boiler upon application of the vacuum, can be made smaller, and consequently takes up less space.
  • FIG. 4 shows a section through the horizontal circumferential stiffening 16. You can see the attached to the strips 17 by means of a welded joint 25 metal plates 18. The strips 17 are in turn welded to the outer shell shell 2 as already said. The stiffener 16 is in turn stiffened with ribs 28.
  • FIG. 5 shows a vertical section through a boiler end wall, viewed from the outside.
  • the already mentioned area around an access hatch 27 can be seen, wherein the cavity formed by the double-wall structure 2, 5 is closed at the edge by a circumferential end strip 20.
  • Also visible are externally arranged ribs 28 and stiffeners 16.
  • FIG. 6 shows a vertical section through the boiler end wall, viewed from the inside. You can see the arranged on the outside of the boiler shell lower stiffening rib 16, and with a view of the metal plate 18th a arranged in the interior 9 stiffening ribs 28.
  • the double-wall structure is made on the front wall to the bottom part 3 calls.
  • the metal plate 18 ends where the taper begins in cross section to the bottom part 3.
  • FIG. 7 shows a section through the boiler wall in the region of a pipe feedthrough 21, which is provided for the discharge of the insulating liquid.
  • the intermediate space formed by the double-wall structure 2.5 is again closed by a closing strip 20.
  • FIG. 8 shows a section of the boiler wall in the area of the connection of the cooling system.
  • the connecting pipe 22 serves for connection to a heat exchanger, not shown. For marginal completion of the gap takes over here not a conclusion bar, but the connection pipe 22 itself.
  • FIG. 9 shows in an enlarged view a preferred embodiment of the double-wall boiler.
  • a filler 15 is added, which has a comparatively better thermal conductivity.
  • an embodiment is shown which additionally or alternatively provides a cooling line 30 which is flowed through by the insulating liquid (eg transformer oil).
  • the cooling line 30 abuts against the inner wall 13 of the inner boiler shell 5 and is secured by means not shown clips.
  • reference numeral 29 is exemplified one of several injection port or air outlet openings 29 in the inner vessel 5, which are closed again after the introduction of the plastic 7 (eg welding).
  • the outer vessel 2 is manufactured in a conventional manner. This usually happens through a welding construction.
  • the strips 17 are arranged in a width of the metal plates 18 corresponding distance on the inner surface 14 with a fillet weld to the outer shell shell 2 welded.
  • the metal plates 18 are successively placed on the strips 17 and also welded by means of a fillet weld. This creates an inner boiler shell 5 with congruent flat front and side surfaces.
  • the plastic is then injected through injection openings 29, followed by curing and by adhesion a firm connection with the inner surfaces 13, 14. Finally, the injection openings and air outlet openings 29 are closed, for example, welded. The required for the penetration of the plastic number and arrangement of the injection openings / outlet openings 29 is dependent on the size of the metal plates 18 and the distance 4.
  • the above embodiment shows an inner boiler shell without bottom part.
  • the inner jacket has a bottom part and also the intermediate space is filled with plastic.
  • the two coats are similar to a pot and a matching planter.
  • the plastic formed in the gap does not have to be made of a fabric but can of course be made out be composed of different plastic layers and also plastic structural elements. It is also conceivable that the lid is designed as a double-wall structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Insulating Of Coils (AREA)
  • Transformer Cooling (AREA)
  • Building Environments (AREA)
  • Frying-Pans Or Fryers (AREA)

Claims (7)

  1. Cuve pour un transformateur ou une bobine à refroidissement liquide, comprenant :
    a) une enveloppe extérieure de cuve (2) avec une partie fond (3) ;
    b) une enveloppe intérieure de cuve (5) entourée par une enveloppe extérieure de cuve (2) avec un espacement (4), les enveloppes extérieure et intérieure de cuve (2, 5) étant réalisées en métal ;
    c) un matériau plastique ou polymère (7), qui est mis en place dans un espace libre (6), délimité par la surface intérieure (14) de l'enveloppe extérieure de cuve (2) et par la surface intérieure (13) de l'enveloppe intérieure de cuve (5) et qui remplit au moins partiellement ledit espace libre (6), la matière plastique ou polymère (7) étant, après un durcissement, liée de manière fixe par adhérence aux surfaces intérieures (13, 14), caractérisée en ce que l'enveloppe intérieure de cuve (5) ou l'enveloppe extérieure de cuve (2) présente des ouvertures obturables (29) destinées à une injection du matériau plastique ou polymère (7).
  2. Cuve selon la revendication 1, caractérisée en ce que l'épaisseur d'enveloppe (11) de l'enveloppe intérieure de cuve (5) est inférieure à l'épaisseur d'enveloppe (12) de l'enveloppe extérieure de cuve (7).
  3. Cuve selon la revendication 2, caractérisée en ce que l'épaisseur d'enveloppe (11) de l'enveloppe intérieure de cuve (5) représente environ la moitié de l'épaisseur d'enveloppe (12) de l'enveloppe extérieure de cuve (2).
  4. Cuve selon l'une quelconque des revendications 1 à 3, caractérisée en ce que l'espacement (4) entre les surfaces intérieures (13, 14) est choisi dans une plage comprise entre 5 et 50 mm.
  5. Cuve selon l'une quelconque des revendications 1 à 3, caractérisée en ce qu'une conduite (30) qui guide un milieu réfrigérant est agencée dans l'espace libre (6).
  6. Cuve selon la revendication 5, caractérisée en ce qu'une matière de remplissage (15) qui présente une résistance thermique inférieure à celle du matériau plastique ou polymère (7) est contenue dans le matériau plastique ou polymère (7).
  7. Cuve selon l'une quelconque des revendications 1 à 6, caractérisée en ce que l'enveloppe intérieure de cuve (5) est formée de plaques de métal (18) affrontées de manière essentiellement jointive, lesdites plaques de métal (18) étant soudées par soudure au niveau de baguettes (17) qui sont pour leur part soudées au niveau de la surface intérieure (14) de l'enveloppe extérieure de cuve (2).
EP12725774.9A 2012-06-05 2012-06-05 Cuve pour transformateurs ou bobines d'arrêt remplis de liquide Active EP2856477B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/060603 WO2013182227A1 (fr) 2012-06-05 2012-06-05 Cuve pour transformateurs ou bobines d'arrêt remplis de liquide

Publications (2)

Publication Number Publication Date
EP2856477A1 EP2856477A1 (fr) 2015-04-08
EP2856477B1 true EP2856477B1 (fr) 2017-10-18

Family

ID=46208550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12725774.9A Active EP2856477B1 (fr) 2012-06-05 2012-06-05 Cuve pour transformateurs ou bobines d'arrêt remplis de liquide

Country Status (7)

Country Link
EP (1) EP2856477B1 (fr)
KR (1) KR101944967B1 (fr)
CN (1) CN104335301B (fr)
BR (1) BR112014030107B8 (fr)
IN (1) IN2014DN09796A (fr)
MX (1) MX336178B (fr)
WO (1) WO2013182227A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10840677B2 (en) 2014-09-17 2020-11-17 Siemens Aktiengesellschaft Bullet-resistant electrical installation
EP3979275A1 (fr) * 2020-10-05 2022-04-06 Siemens Energy Global GmbH & Co. KG Système d'amortissement de son et de vibration pour cuves de transformateurs et cuves de réacteurs
EP4312236A1 (fr) * 2022-07-13 2024-01-31 TenneT TSO GmbH Boîtier de transformateur, transformateur doté d'un tel boîtier de transformateur et agencements de ce boîtier de transformateur

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL3062320T3 (pl) * 2015-02-27 2018-03-30 Siemens Aktiengesellschaft Układ do redukcji emisji dźwięku przez chłodzone cieczą transformatory lub dławiki
KR101768304B1 (ko) 2015-04-03 2017-08-14 주식회사 에이엠씨에너지 레이디얼 모드 컨투어형 압전 변압장치
EP3089179B1 (fr) * 2015-04-29 2020-10-21 General Electric Technology GmbH Boîtier d'équipement électrique comprenant une paroi double usage pour la réduction de bruit
DE102016207425A1 (de) * 2016-04-29 2017-11-02 Siemens Aktiengesellschaft Anordnung von einphasigen Transformatoren
DE102016207390A1 (de) * 2016-04-29 2017-11-02 Siemens Aktiengesellschaft Transformator mit eingehängtem Kühlmodul
EP3537462B1 (fr) 2018-03-07 2021-01-06 ABB Power Grids Switzerland AG Réservoir de transformateurs de coque remplie de liquide ou réacteurs de coque
EP3764377A1 (fr) * 2019-07-09 2021-01-13 ABB Schweiz AG Cuve du transformateur ou reacteur a enveloppe remplie de liquide

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US20110168722A1 (en) * 2010-01-13 2011-07-14 BDT Consultants Inc. Full containment tank

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10840677B2 (en) 2014-09-17 2020-11-17 Siemens Aktiengesellschaft Bullet-resistant electrical installation
EP3321944B1 (fr) 2014-09-17 2022-04-06 Siemens Energy Global GmbH & Co. KG Installation électrique résistante au bombardement
EP3979275A1 (fr) * 2020-10-05 2022-04-06 Siemens Energy Global GmbH & Co. KG Système d'amortissement de son et de vibration pour cuves de transformateurs et cuves de réacteurs
EP4312236A1 (fr) * 2022-07-13 2024-01-31 TenneT TSO GmbH Boîtier de transformateur, transformateur doté d'un tel boîtier de transformateur et agencements de ce boîtier de transformateur

Also Published As

Publication number Publication date
BR112014030107B8 (pt) 2023-04-25
BR112014030107B1 (pt) 2020-09-08
MX2014014846A (es) 2015-03-05
EP2856477A1 (fr) 2015-04-08
CN104335301B (zh) 2017-10-31
KR101944967B1 (ko) 2019-02-01
IN2014DN09796A (fr) 2015-07-31
WO2013182227A1 (fr) 2013-12-12
KR20150023639A (ko) 2015-03-05
BR112014030107A2 (pt) 2017-06-27
MX336178B (es) 2016-01-06
CN104335301A (zh) 2015-02-04

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