EP2485223A2 - Traversée haute tension avec gradient de température minimisé - Google Patents
Traversée haute tension avec gradient de température minimisé Download PDFInfo
- Publication number
- EP2485223A2 EP2485223A2 EP20120153418 EP12153418A EP2485223A2 EP 2485223 A2 EP2485223 A2 EP 2485223A2 EP 20120153418 EP20120153418 EP 20120153418 EP 12153418 A EP12153418 A EP 12153418A EP 2485223 A2 EP2485223 A2 EP 2485223A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- conductor
- voltage bushing
- insulating body
- bushing
- 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.)
- Withdrawn
Links
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
- H01B17/54—Insulators or insulating bodies characterised by their form having heating or cooling devices
-
- 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
Definitions
- the invention relates to a high-voltage bushing with an electrically insulating insulating body which extends in a longitudinal direction, extending through the insulating body through high-voltage conductor and attached to the insulating mounting flange for mounting the high-voltage feedthrough.
- Such a high-voltage bushing is from the DE 32 26 057 A1 already known.
- the high-voltage feedthrough shown there has a high-voltage conductor which extends in the longitudinal direction through an electrically insulating winding body.
- a mounting flange which surrounds the insulating body in a clamping fit.
- To control high electric field strengths of the insulating body is formed as a winding body and has potential control inserts, which are electrically conductive, the potential control inserts are spaced apart by resin impregnated insulation layers.
- Such a high-voltage bushing is also referred to as a so-called resin impregnated high-voltage bushing (RIP). Essentially, it serves to conduct a high electrical potential through a wall that is at ground potential.
- RIP resin impregnated high-voltage bushing
- the known from the prior art high-voltage bushings has the disadvantage that they can only be dimensioned so that they can be used in DC voltage levels up to 550 kV. This is due to the one to be controlled mass of the insulating body, which can grow to several tons.
- the high voltage conductor is in the implementation by the insulator not only electrically, but also thermally insulated.
- the heat losses throughout the system which are mainly generated by the flow of current, must be dissipated as well as possible to the outside atmosphere in order to avoid or at least reduce thermal induced voltages and thus lifetime reductions.
- the object of the invention is therefore to provide a high-voltage bushing of the type mentioned, which has a reduced temperature gradient in the longitudinal direction during normal operation, so that thermal stresses are avoided as possible.
- the invention solves this problem in that the high-voltage conductor is at least partially tubular and defines a gas-tight conductor cavity, which is filled with a vaporizable coolant.
- the thermal conductivity of the high-voltage conductor is increased by this an internal heat transfer according to a so-called "heat pipe” is impressed.
- the use of external cooling devices, for example by an external "heat pipe”, has become superfluous according to the invention.
- the heat transfer takes place as in a so-called “heat pipe” by evaporation and condensation.
- the high-voltage conductor itself forms a cavity which fills with a vaporizable liquid is.
- heat is removed from the high-voltage conductor at this point.
- the liquid is transferred to its vapor phase.
- the gaseous substance is distributed throughout the conductor cavity. At a colder point in the conductor cavity, condensation of the gas occurs, with heat being delivered to the high voltage conductor. Subsequently, the liquid can flow back inside the conductor cavity.
- the high-voltage conductor is removed in this way at its hot spots heat, which is released again at colder places. Therefore, the thermal gradient is reduced.
- the inventive implementation has a lower weight and is inexpensive in any case.
- the insulating body on the high-voltage conductor wound electrically conductive deposits which are spaced apart by impregnated in resin insulating layers.
- the insulating body is designed as a winding body
- the inner deposits such as aluminum foil or other conductors has, which provide a controlled Ab Kunststoffung the high electric fields in the insulator.
- Resin-impregnated paper is referred to as "Resin Impragnated Paper”. Feedthroughs with such winding bodies are therefore referred to in the art as RIP feedthroughs.
- High-voltage bushings whose insulator consists essentially of resin, however, are well insulated not only electrically but also thermally well, so that the invention brings advantages in particular for such insulators. After soaking the paper with resin, this is cured naturally.
- the choice of the cooling liquid and the cooling fluid is essentially arbitrary. According to a preferred embodiment, however, the cooling liquid is water. Water is available at very low cost. Experiments with water as a coolant have been successful.
- the water was deionized prior to filling in the conductor cavity.
- the conductor cavity is free of residual gases.
- the removal of the residual gases, such as oxygen, nitrogen or the like, has proved to be advantageous for the internal heat transfer. In this way, an even lower temperature gradient in the longitudinal direction of the high-voltage conductor is thus made possible.
- the high-voltage conductor is a copper tube.
- the copper tube is hermetically sealed by gas-tight sealing of the two tube ends.
- a cap was attached by welding, gluing or the like on the pipe ends. Such a procedure is particularly cost-effective and leads to a particularly light high-voltage bushing.
- the conductor cavity extends here over the entire high-voltage conductor.
- the partial pressure of the cooling liquid in the conductor cavity is set so that during normal operation, the smallest possible temperature gradient prevails in the longitudinal direction.
- a small amount, for example of deionized water, of the order of less than one hundred milliliters was sufficient to provide a sufficient reduction in the temperature gradient.
- FIG. 1 shows an embodiment of the high voltage bushing 1 according to the invention in a cross-sectioned half-view in a schematic representation.
- the high-voltage bushing 1 is shown only halfway.
- the high-voltage bushing 1 is formed symmetrically, so that the lower half, not shown, is designed almost identical to the upper half shown.
- the high-voltage bushing 1 has an insulating body 2 and a high-voltage conductor 3, which extends in a longitudinal direction through the insulating body 2.
- the insulating body 2 is in the embodiment shown, a winding body having over the high-voltage conductor 3 wound conductive deposits, which are separated by paper layers.
- the paper layers were soaked in resin, so that a so-called resin impregnated winding body is provided as an insulating body 2. After soaking the paper layers in the liquid resin, this is of course cured so that a solid insulating body is formed.
- the high-voltage conductor 3 is formed over its entire length as a high-voltage line pipe, which consists of copper in the embodiment shown.
- the high-voltage line pipe 3 has opposite free ends, which are sealed gas-tight by sealing caps 4 and 5.
- the caps 4 and 5 were gas-tight by suitable joining methods placed on the ends of the high voltage conductor tube 3. Previously, residual gases were removed by applying a vacuum from the interior of the high-voltage conductor tube 3. Furthermore, deionized water was added as a cooling liquid into the interior of the high voltage conductor tube 3, which is figuratively not shown.
- the caps 4 and 5 are also conductive and made of copper, for example, they are mechanical and electrically connected to not shown in the figure, terminals of the high-voltage bushing 1.
- the insulating part 2 at least partially extends in a cap housing 6, which also shields the high-voltage conductor 3 and the insulating unit 2 to the outside.
- a mounting flange 7 which is fixed in a clamping fit on the insulating part 2.
Landscapes
- Insulators (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011003592A DE102011003592A1 (de) | 2011-02-03 | 2011-02-03 | Hochspannungsdurchführung mit minimierten Temperaturgradienten |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2485223A2 true EP2485223A2 (fr) | 2012-08-08 |
EP2485223A3 EP2485223A3 (fr) | 2015-05-13 |
Family
ID=45655347
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20120153418 Withdrawn EP2485223A3 (fr) | 2011-02-03 | 2012-02-01 | Traversée haute tension avec gradient de température minimisé |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2485223A3 (fr) |
DE (1) | DE102011003592A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016201907A1 (de) | 2016-02-09 | 2017-08-10 | Siemens Aktiengesellschaft | Hochspannungsvorrichtung |
EP3435493B1 (fr) | 2017-07-27 | 2020-03-25 | Siemens Aktiengesellschaft | Traversée de haute tension enfichable et installation haute tension comprenant un traversée de haute tension enfichable |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4005297A (en) * | 1972-10-18 | 1977-01-25 | Westinghouse Electric Corporation | Vacuum-type circuit interrupters having heat-dissipating devices associated with the contact structures thereof |
DE2741313A1 (de) * | 1977-09-14 | 1979-03-15 | Felten & Guilleaume Carlswerk | Hochspannungs-kondensatordurchfuehrung mit einem gekuehlten innenleiter |
DE2757571A1 (de) * | 1977-12-23 | 1979-07-05 | Felten & Guilleaume Carlswerk | Hochbelastbare stromleiteranordnung, insbesondere fuer hochspannungsdurchfuehrungen |
DE3226057A1 (de) | 1982-07-12 | 1984-01-12 | Siemens AG, 1000 Berlin und 8000 München | Hochspannungsdurchfuehrung mit einem gewickelten isolationskoerper |
DE10109722A1 (de) * | 2001-02-28 | 2002-09-05 | Moeller Gmbh | Kühlanordnung in elektrischen Geräten oder Schaltanlagen mit Wärmeleitrohren |
SE526713C2 (sv) * | 2003-07-11 | 2005-10-25 | Abb Research Ltd | Genomföring samt förfarande för tillverkning av genomföringen |
EP2264719B1 (fr) * | 2009-06-18 | 2014-04-02 | ABB Technology Ltd | Dispositif à haute tension |
-
2011
- 2011-02-03 DE DE102011003592A patent/DE102011003592A1/de not_active Withdrawn
-
2012
- 2012-02-01 EP EP20120153418 patent/EP2485223A3/fr not_active Withdrawn
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
EP2485223A3 (fr) | 2015-05-13 |
DE102011003592A1 (de) | 2012-08-09 |
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RIC1 | Information provided on ipc code assigned before grant |
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