EP3576108B1 - Kapazitiv abgestufte hochspannungsdurchführung - Google Patents
Kapazitiv abgestufte hochspannungsdurchführung Download PDFInfo
- Publication number
- EP3576108B1 EP3576108B1 EP18175557.0A EP18175557A EP3576108B1 EP 3576108 B1 EP3576108 B1 EP 3576108B1 EP 18175557 A EP18175557 A EP 18175557A EP 3576108 B1 EP3576108 B1 EP 3576108B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bushing
- electrical conductor
- capacitive
- capacitive graded
- conductive layers
- 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
Links
- 239000007788 liquid Substances 0.000 claims description 23
- 150000002148 esters Chemical class 0.000 claims description 19
- 239000004020 conductor Substances 0.000 claims description 18
- 239000012774 insulation material Substances 0.000 claims description 11
- 239000012212 insulator Substances 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 5
- 239000011888 foil Substances 0.000 claims description 4
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- 239000002480 mineral oil Substances 0.000 description 3
- 235000010446 mineral oil Nutrition 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 239000003989 dielectric material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000010420 art technique Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/26—Lead-in insulators; Lead-through insulators
- H01B17/28—Capacitor type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/20—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/34—Insulators containing liquid, e.g. oil
Definitions
- the present invention relates generally to high voltage bushings and more particularly to insulation techniques for high voltage bushing for use in high environmental requirements.
- An objective of the present invention is to propose a new concept of a bushing adapted to high environmental requirements, in particular to prevent oil pollution, and that enables additionally an easy and cost efficient manufacturing.
- the present invention proposes notably a capacitive graded bushing for high electric voltage comprising an ester as impregnation agent within its capacitive graded core as disclosed by the object of the independent claim.
- the present invention concerns therefore a capacitive graded bushing for high electric voltage as defined in appended claim 1.
- FIG. 1 A preferred embodiment of a capacitive graded bushing according to the invention is presented in Figure 1 , which shows a part of a high electric voltage capacitive graded bushing 1 for a transformer or a high voltage device.
- the bushing 1 comprises an insulator 11 having a chamber 111 for receiving an electrical conductor 13 and insulating matter 12 that surrounds the electrical conductor 13.
- the electrical conductor 13 can be a solid or rope conductor. According to a first preferred embodiment, the electrical conductor 13 might be placed within a tube 15. According to other embodiments, the electrical conductor might be a conductive tube.
- the electrical conductor 13 comprises a first extremity 131 located at the top of the bushing 1 and configured for being electrically connected to a first device and a second extremity (not shown) configured for being connected to another device, for instance a transformer.
- the electrical conductor 13 typically extends from the top of the bushing 1 to its bottom through the insulator chamber 111, clamping means and gaskets ensuring the different parts of the bushing 1 being hermetically held together.
- the bushing 1 further comprises concentric conductive layers 121 (e.g. aluminum foils) which are isolated against another and serve as a built-in capacitor for equalizing and controlling the electrical stress on the insulation and maximizing the electrical field uniformity.
- the insulating matter 12 suitable for high voltage fills then the space between successive concentric conductive layers 121.
- the concentric conductive layers 121 arranged concentrically around the electrical conductor 13 and spaced apart by said insulating matter 12 form the capacitive graded core 16 of the bushing 1.
- the capacitive graded core 16 is typically placed within the chamber 111 and preferentially surrounded by insulating matter, e.g. insulating liquid 2.
- the insulating liquid is an ester liquid that preferentially fills a space between the capacitive graded core 16 and a wall of the insulator chamber 111.
- the present invention proposes to use a dielectric insulation material impregnated with an ester liquid as insulating material placed between the successive conductive layers 121.
- the insulator 11 might be surmounted by an expansion chamber 14 communicating with the chamber 111 of the insulator 11 in order to have the ester liquid 2 filling the chamber 111 and extending upwardly into the liquid expansion chamber 14.
- the ester liquid may partly fill the expansion chamber 14.
- the chamber 111 is further configured for having the ester liquid 2 extending upwardly into the liquid expansion chamber 14 in case of a volume change of the ester liquid 2 due to temperature variations.
- the dielectric insulation material forms a layer between each successive conductive layers 121, wherein the layers formed by the dielectric insulation material and the successive conductive layers 121 are each wound around the electrical conductor 13.
- said layers formed by the dielectric insulation material and the successive conductive layers can be directly or indirectly wound around the electrical conductor 13.
- the electrical conductor could be a conductive tube serving as winding support for the previously mentioned layers.
- the electrical conductor could be placed within a tube 15 serving as winding support for said previously mentioned layers.
- the dielectric insulation material is a plastic mixed dielectric impregnated with the ester liquid, which comprises for instance a plastic foil and a non-woven fabric.
- the plastic foil and the non-woven fabric have a sandwich structure between two successive conductive layers 121.
- the dielectric insulation material is a paper impregnated with the ester liquid.
- the present invention proposes therefore to satisfy the high environmental requirements for a bushing by using as insulating matter a special combination of a dielectric and an ester liquid as impregnation agent within the capacitive graded core of the bushing.
- the ester liquid according to the invention can be synthetic and/or natural ester liquid.
- the present invention results in a capacitive graded high voltage bushing type EIS (ester impregnated synthetic)
- Other non claimed capacitive graded high voltage bushing are of type EIP (ester impregnated paper). According to the latter, common paper used in OIP technology is used instead of the plastic mixed dielectric.
- the present invention has many different advantages over existing solutions, which makes the bushing according to the invention a very attractive product.
- an advantage of the EIP bushing is that for a manufacturer of established OIP bushing only small adaptions in the production process are required. Furthermore, the EIP and EIS bushings provide more security by using ester liquid which is less inflammable compared to the common used mineral oil.
- the combination between plastic mixed dielectric or paper dielectric with a special impregnation agent that is natural or synthetic ester provides new application ranges for economic liquid insulated high voltage bushings. Additionally, the bushings according to the invention provide the following advantages compared to prior art bushings:
- the proposed EIS or EIP technologies are an economical alternative compared to the more expensive solid material technology. Further for EIP technology the same production equipment almost free of adaptation can be used (for instance the winding machine for producing the capacitive graded core of the bushing).
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulators (AREA)
- Insulating Bodies (AREA)
Claims (5)
- Kapazitiv gesteuerte Durchführung (1) für hohe elektrische Spannung, umfassend:- einen Isolator (11), der eine Isolatorkammer (111) zum Aufnehmen einer elektrischen Leiters (13) und einer Isoliermaterie (12) umfasst;- wobei der elektrische Leiter (13) innerhalb der Durchführung (1) angeordnet ist und sich durch die Isolatorkammer (111) erstreckt;- die Isoliermaterie (12) den elektrischen Leiter (13) umgibt und mehrere konzentrische leitende Schichten (121) umfasst, die den elektrischen Leiter (13) umgeben, um eine einheitliche Kernisolation zu bilden, die im Folgenden als kapazitiv gesteuerter Kern (16) bezeichnet wird;dadurch gekennzeichnet, dass ein mit einer Esterflüssigkeit imprägniertes dielektrisches Isoliermaterial zwischen zwei aufeinanderfolgenden leitenden Schichten (121) platziert ist, wobei das dielektrische Isoliermaterial ein gemischtes Kunststoffdielektrikum ist.
- Kapazitiv gesteuerte Durchführung (1) nach Anspruch 1, wobei das dielektrische Isoliermaterial ein Schicht zwischen zwei aufeinanderfolgenden leitenden Schichten (121) bildet.
- Kapazitiv gesteuerte Durchführung (1) nach Anspruch 1 oder 2, wobei die durch das dielektrische Isoliermaterial gebildete Schicht und die aufeinanderfolgenden leitenden Schichten (121) jeweils um den elektrischen Leiter (13) gewickelt sind.
- Kapazitiv gesteuerte Durchführung (1) nach Anspruch 1, wobei das gemischte Kunststoffdielektrikum eine Kunststofffolie und einen Vliesstoff umfasst.
- Kapazitiv gesteuerte Durchführung (1) nach einem der Ansprüche 1 bis 4, wobei die Esterflüssigkeit einen Raum zwischen dem kapazitiv gesteuerten Kern (16) und einer Wand der Isolatorkammer (111) füllt.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18175557.0A EP3576108B1 (de) | 2018-06-01 | 2018-06-01 | Kapazitiv abgestufte hochspannungsdurchführung |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18175557.0A EP3576108B1 (de) | 2018-06-01 | 2018-06-01 | Kapazitiv abgestufte hochspannungsdurchführung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3576108A1 EP3576108A1 (de) | 2019-12-04 |
EP3576108B1 true EP3576108B1 (de) | 2023-05-10 |
Family
ID=62495708
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18175557.0A Active EP3576108B1 (de) | 2018-06-01 | 2018-06-01 | Kapazitiv abgestufte hochspannungsdurchführung |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP3576108B1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4080526A1 (de) | 2021-04-21 | 2022-10-26 | Hitachi Energy Switzerland AG | Buchse mit einem kondensatorkörper und elektrische anlage mit buchse |
WO2023011912A1 (en) | 2021-08-05 | 2023-02-09 | Hitachi Energy Switzerland Ag | Bushing comprising low-viscosity insulating fluid and electrical facility with bushing |
EP4131292A1 (de) | 2021-08-05 | 2023-02-08 | Hitachi Energy Switzerland AG | Buchse mit niederviskoser isolierflüssigkeit und elektrische anlage mit der buchse |
CN114005628B (zh) * | 2021-09-29 | 2022-09-16 | 云南电网有限责任公司电力科学研究院 | 一种梯度绝缘部件的制备方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1622173A1 (de) * | 2004-07-28 | 2006-02-01 | Abb Research Ltd. | Hochspannungsdurchführung |
RU2613686C2 (ru) * | 2012-12-13 | 2017-03-21 | Абб Текнолоджи Лтд | Высоковольтное устройство и способ изготовления высоковольтного устройства |
PL412175A1 (pl) * | 2015-04-29 | 2016-11-07 | Politechnika Poznańska | Zastosowanie w wysokonapięciowym izolatorze przepustowym typu OIP estru syntetycznego oraz wysokonapięciowy izolator przepustowy typu OIP |
EP3096334B1 (de) * | 2015-05-22 | 2020-12-30 | ABB Power Grids Switzerland AG | Elektrische durchführung |
-
2018
- 2018-06-01 EP EP18175557.0A patent/EP3576108B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
EP3576108A1 (de) | 2019-12-04 |
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