EP4115435A1 - Elektrisches gerät mit beulenkessel - Google Patents
Elektrisches gerät mit beulenkesselInfo
- Publication number
- EP4115435A1 EP4115435A1 EP21721848.6A EP21721848A EP4115435A1 EP 4115435 A1 EP4115435 A1 EP 4115435A1 EP 21721848 A EP21721848 A EP 21721848A EP 4115435 A1 EP4115435 A1 EP 4115435A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- section
- winding
- electrical device
- barrier system
- bulge
- 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.)
- Granted
Links
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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/321—Insulating of coils, windings, or parts thereof using a fluid for insulating purposes only
-
- 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
Definitions
- the invention relates to an electrical device for connection to a high-voltage network with a tank filled with insulating fluid, which has at least one side wall which forms a flat wall section and a bulge section which enlarges the inner volume of the tank and which is arched radially outward and extends between two axial edges, an active part arranged in the tank, which has a core and at least one winding enclosing a section of the core, and at least one winding barrier system enclosing one or more windings, the bulge section being designed to complement a section of the winding barrier system and at a distance from it.
- Transformers for example, have an active part that has a magnetizable core that is formed from sheet iron that lies against one another with their flat sides. The core forms a closed magnetic circuit.
- the core forms three legs, for example, which are connected to one another via a lower and upper yoke.
- Each core leg is surrounded by an inner secondary winding and an outer primary winding.
- the core and the said windings are arranged concentrically to one another.
- the object of the invention is therefore to improve the reduction of the field in the edge area and thus avoid an electrical flashover.
- the invention solves this problem in that an additional barrier is arranged between the winding barrier system and the bulge section, which has a rounded section facing the bulge section and bent radially outward and two flat planar sections, each of which extends from the round section at an axial fold extend towards a free end.
- an additional barrier is arranged between the bulge section of the side wall for dividing the free oil path.
- the additional barrier has a Rundab section that is bent radially outwards, similar to the bulge section.
- two flat plan sections are provided, each extending in a plane, so that a sharp bend, a fold or, in other words, a fold is formed between each plan section and the Rundab section. This fold extends in the axial direction, whereas the round section as the Beulenab section of the side wall is bent radially outward and is thus rounded.
- the two plan sections of the access sentence barriers extend from the round section to their free end.
- an additional barrier designed according to the invention advantageously divides the free oil path, in particular at the kinks in the side wall, in an electrically advantageous manner.
- an electrical device is thus provided whose active part can be designed for higher powers, that is to say higher voltages or higher currents, without having to deviate from the required transport dimensions.
- the electrical device according to the invention is, for example, a transformer or a choke. If the electrical device is a transformer, it has one or more pairs of inductively coupled windings. The two windings of a winding pair are arranged concentrically to one another, for example, with one winding being a low-voltage winding and the other winding being a high-voltage winding. A core leg extends through both windings as a core section.
- the winding barrier system is advantageously formed from a number of barriers which limit oil channels between them, so that there is an improved reduction of the electrical field in the radial direction.
- the barriers are made from pressboard.
- Such barrier systems are, however, known to the person skilled in the art, so that a description of the exact structure of such a barrier system can be dispensed with at this point.
- the barrier system preferably has a circular cylindrical outer contour.
- the additional barrier which is advantageously made from an electrically non-conductive material, for example from pressboard, extends between this barrier system.
- the additional barrier is also made of paper or cardboard.
- the round section is advantageously designed to be complementary in shape to the bulge section. According to this advantageous further development of the invention, the round section has a constant distance from the rounded outwardly curved bulge section.
- Planab sections each extend parallel to the flat wall section of the side wall. If the plan sections are aligned parallel to the plan section of the side wall of the electrical device according to the invention, the electrical field at the edges of the side wall is subdivided even further.
- the additional barrier is held at a distance from the winding barrier system and from the bulge section by means of at least one folding segment arranged at a distance from the winding barrier system and by means of a retaining strap.
- the holding of the additional barrier takes place in the context of the invention by means of a retaining strap and with the help of cap segments.
- the cap segments which are usually installed in the boiler anyway, are used to hold the additional barrier.
- the retaining band which is designed, for example, as a flat band, it stretches around the additional barrier system, so that it is, for example, with its flat side on its outer contour. From there, it is wrapped around the round section of the additional barrier system, with suitable passage openings or slots being provided in the additional barrier.
- the retaining strap consists, for example, of cardboard, paper or some other formable pressboard.
- a stopper is provided, which extends between tween the winding barrier system and the plan section of the additional barrier.
- the adjuster which can also be referred to synonymously as a spacer, is also made of pressboard, cardboard or paper and is used to align the respective plan section of the additional barrier, the free end of which could otherwise freely align.
- the stopper is expediently attached to the winding barrier system via the retaining strap.
- Cords made of cardboard, paper or another non-conductive material are used for fastening to the respective plan section, for example at the free end of each plan section.
- the operator has appropriate feed-through openings.
- each employee is provided with slots through which the retaining strap can be passed.
- the winding barrier system has a circular cylindrical outer contour and the bulge portion be bounded by a portion of a circular hollow cylinder, where the winding barrier system and the bulge portion are arranged concentrically to each other.
- the windings are cylindrically configured and concentric to one another and to the core limb surrounded by them.
- this also applies to the winding barrier system, which then also has an effect on the bulge section due to the shape-complementary design. This is then a segment or section of a circular cylinder.
- the bulge section and the round section each limit a section of a hollow cylinder, the hollow cylinder having different radii and the bulge section and the round section being arranged concentrically to one another.
- the section above for Beulenab and the winding barrier system also applies to the round section and the bulge section.
- Figure 1 is a sectional plan view of an electrical device according to the prior art
- Figure 2 shows an embodiment of the electrical device according to the invention in a cut plan view
- Figure 3 shows the attachment of the additional barrier to the winding barrier system
- Figure 4 illustrate the attachment of the cap segment and the Segmen te of the winding barrier system in a perspective view.
- Figure 1 shows an embodiment of an electrical Ge device 1 according to the prior art in a cut cross-sectional view from above.
- the electrical device 1 shown is designed as a power transformer 1, which has a tank filled with an insulating fluid, from which a side wall 2 can be seen only Lich.
- the side wall 2 has a planar wall section 3 and a bulge section 4 which is radially outwardly arched in the inner volume of the boiler.
- the bulge portion is arranged between two axia len edges 5 and 6 extending in an axial direction.
- the axial direction in FIG. 4 goes into the plane of the drawing or comes out of the plane of the drawing.
- a high-voltage winding 7 and a low-voltage winding 8 are arranged, which concentrically zuei- nander and are arranged to form a core leg, not shown in the figures.
- the bulge section 4 is curved outward to enlarge the internal volume of the tank, so that a required minimum distance is maintained between the high-voltage winding 7 and the side wall 2 and high electrical field strengths with voltage flashovers inside the transformer 1 are avoided.
- high electric field strengths can occur at the edges shown as corners in the sectional view shown, so that the operating voltage of the power transformer cannot be increased further without chips being produced at these corners or bevels flashovers occur that would irreparably damage the electrical device.
- FIG. 2 shows an embodiment of the electrical device 9 according to the invention, which leads out again as a transformer 9.
- the transformer 9, only partially shown in a sectional plan view, has a tank or boiler, of which only one side wall 2 is shown in FIG.
- the bulge section 4 extends between edges 5 and 6 which extend in the axial direction and which are illustrated in FIG. 2 as corners 5 and 6 due to the selected sectional representation.
- the transformer 9 is filled with an insulating fluid, for example a mineral oil or an ester liquid.
- an insulating fluid for example a mineral oil or an ester liquid.
- a magnetizable core is arranged, of which only one core leg 10 can be seen in FIG.
- the core leg 10 is concentrically enclosed by a low-voltage winding 8 and a high-voltage winding 7.
- the two windings 7 and 8 are in turn surrounded by a barrier system 11 which consists of individual barriers 12 that are radially spaced from one another. Between Barriers 12 of the barrier system 11 are oil channels installed, which heighten the electrical strength of the transformer 9.
- an additional barrier 13 can be seen, which has egg NEN the bulge section 4 facing round section 14, of which two plan sections 15 and 16 each extend to a free end.
- the round section 14 is designed complementary in shape to the circular cylindrical outer contour of the winding barrier system 11 and complementary in shape to the bulge section 4 of the side wall 2.
- the plan sections 15 and 16 extend essentially parallel to the planar wall sections 3 of the side wall 2. In other words, the plan sections 15 extend and 16 from the axial folds 17 and 18, which are shown again as corners in FIG. 2 due to the two-dimensional representation.
- the round section 14 merges into one of the plan sections 15 and 16 at said axial folds 17 and 18.
- the additional barrier 13 is formed in one piece.
- the additional barrier consists of pressboard. Notwithstanding this, however, other electrically non-conductive materials can also be used to produce the additional barrier.
- the additional barrier consists of cardboard, paper or even an electrically non-conductive plastic.
- FIG. 3 shows the attachment of the additional barrier 13 in more detail. It can be seen that this is held at a distance from the outer barrier 12 of the winding barrier system 11 with the aid of cap segments 19.
- the cap segments 19, which are also rounded, are L-shaped in a longitudinal sectional view and are clamped to a lower fastening system 20 at their shorter foot end.
- the fastening system 20 is also used to fasten the barriers 12 of the winding barrier system 11 and is here on the bottom of the tank. orderly. Between two juxtaposed Kappseg elements 19 are formed longitudinal slots, through each of which a plan portion 16 of the additional barrier 13 extends.
- a retaining strap 21 is provided, which consists of cardboard and is designed as a flat band.
- the flat side of the retaining strap rests against the outer contour of the winding barrier system 11 and is guided from there through a slot 22 in the round section 14 of the additional barrier 13, so that the retaining strap 21 surrounds the round section from the outside and thus provides additional support for the additional barrier 13 .
- a spacer or adjuster 22 can be seen which has a bent foot section 23 with which it rests against the outer contour of the winding barrier system 11.
- the retaining strap is guided over the foot section, so that the foot section 23 is pressed by the retaining strap 21 against the winding barrier system 11.
- an adjuster slot 24 is formed, through which the retaining strap 21 is guided.
- the actuator 22 is designed to be dimensionally stable, so that it ensures a firm and stable alignment of the plan sections 16 to the planar wall sections.
- FIG. 4 illustrates the fastening of the cap segments 19 to the fastening system 20.
- the L-shaped configuration of the cap segments 19 in longitudinal section can be seen.
- the inner barriers 12 of the winding barrier system 11 can be seen on the basis of a partially transparent representation.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
- Coils Of Transformers For General Uses (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP25214168.4A EP4668298A3 (de) | 2020-04-14 | 2021-04-09 | Elektrisches gerät mit beulenkessel |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020204661.1A DE102020204661A1 (de) | 2020-04-14 | 2020-04-14 | 1Elektrisches Gerät mit Beulenkessel |
| PCT/EP2021/059251 WO2021209325A1 (de) | 2020-04-14 | 2021-04-09 | Elektrisches gerät mit beulenkessel |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP25214168.4A Division EP4668298A3 (de) | 2020-04-14 | 2021-04-09 | Elektrisches gerät mit beulenkessel |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4115435A1 true EP4115435A1 (de) | 2023-01-11 |
| EP4115435B1 EP4115435B1 (de) | 2025-11-12 |
| EP4115435C0 EP4115435C0 (de) | 2025-11-12 |
Family
ID=75690247
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21721848.6A Active EP4115435B1 (de) | 2020-04-14 | 2021-04-09 | Elektrisches gerät mit beulenkessel |
| EP25214168.4A Pending EP4668298A3 (de) | 2020-04-14 | 2021-04-09 | Elektrisches gerät mit beulenkessel |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP25214168.4A Pending EP4668298A3 (de) | 2020-04-14 | 2021-04-09 | Elektrisches gerät mit beulenkessel |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12562299B2 (de) |
| EP (2) | EP4115435B1 (de) |
| CN (1) | CN115380341B (de) |
| DE (1) | DE102020204661A1 (de) |
| PL (1) | PL4115435T3 (de) |
| WO (1) | WO2021209325A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4492412A1 (de) * | 2023-07-13 | 2025-01-15 | Hitachi Energy Ltd | Transformator |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54105731A (en) * | 1978-02-08 | 1979-08-20 | Toshiba Corp | Static induction machinry |
| JPH0935957A (ja) | 1995-07-19 | 1997-02-07 | Hitachi Ltd | 電気機器 |
| JP2001023831A (ja) * | 1999-07-06 | 2001-01-26 | Hitachi Ltd | 静止誘導電器巻線 |
| CN2814637Y (zh) * | 2005-07-19 | 2006-09-06 | 福州天宇电气股份有限公司 | 电力变压器 |
| BR112012033468B1 (pt) | 2010-06-28 | 2024-03-12 | Hitachi Energy Ltd | Conjunto de bobina e blindagem elétrica para um transformador do tipo seco e método para fabricar um conjunto de bobina e blindagem elétrica para um transformador |
| CN202678031U (zh) * | 2012-04-20 | 2013-01-16 | 中国西电电气股份有限公司 | 一种变压器升高座视察窗绝缘屏蔽装置 |
| PL2866235T3 (pl) * | 2013-10-22 | 2020-04-30 | Abb Schweiz Ag | Transformator wysokiego napięcia |
| EP2869313B1 (de) * | 2013-10-29 | 2017-05-31 | ABB Schweiz AG | Trockentransformatorspule und Trockentransformator |
| EP3076409B1 (de) * | 2015-03-30 | 2017-12-13 | Siemens Aktiengesellschaft | Elektrische verbindung voneinander beabstandeter wicklungen |
| EP3133615B1 (de) | 2015-08-20 | 2018-12-26 | Siemens Aktiengesellschaft | Elektrische wicklungsanordnung |
| CN205828113U (zh) * | 2016-07-26 | 2016-12-21 | Abb瑞士股份有限公司 | 变压器 |
| CN106783027B (zh) | 2016-12-27 | 2018-04-10 | 中国科学院合肥物质科学研究院 | 一种隔离变压器 |
| CN208706393U (zh) * | 2018-10-24 | 2019-04-05 | 山东电力设备有限公司 | 一种三相有载变压器油箱 |
| CN116195014A (zh) * | 2020-09-09 | 2023-05-30 | 西门子能源国际公司 | 用于换流变压器的油箱以及包括油箱的换流变压器 |
-
2020
- 2020-04-14 DE DE102020204661.1A patent/DE102020204661A1/de not_active Ceased
-
2021
- 2021-04-09 WO PCT/EP2021/059251 patent/WO2021209325A1/de not_active Ceased
- 2021-04-09 US US17/918,979 patent/US12562299B2/en active Active
- 2021-04-09 CN CN202180028032.0A patent/CN115380341B/zh active Active
- 2021-04-09 EP EP21721848.6A patent/EP4115435B1/de active Active
- 2021-04-09 PL PL21721848.6T patent/PL4115435T3/pl unknown
- 2021-04-09 EP EP25214168.4A patent/EP4668298A3/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP4668298A3 (de) | 2026-03-25 |
| EP4115435B1 (de) | 2025-11-12 |
| PL4115435T3 (pl) | 2026-04-27 |
| CN115380341A (zh) | 2022-11-22 |
| US12562299B2 (en) | 2026-02-24 |
| DE102020204661A1 (de) | 2021-10-14 |
| WO2021209325A1 (de) | 2021-10-21 |
| CN115380341B (zh) | 2025-10-14 |
| EP4668298A2 (de) | 2025-12-24 |
| US20230326649A1 (en) | 2023-10-12 |
| EP4115435C0 (de) | 2025-11-12 |
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