EP0032687B1 - Traversée haute-tension comportant des couches de feuilles isolantes imprimées - Google Patents

Traversée haute-tension comportant des couches de feuilles isolantes imprimées Download PDF

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Publication number
EP0032687B1
EP0032687B1 EP81100116A EP81100116A EP0032687B1 EP 0032687 B1 EP0032687 B1 EP 0032687B1 EP 81100116 A EP81100116 A EP 81100116A EP 81100116 A EP81100116 A EP 81100116A EP 0032687 B1 EP0032687 B1 EP 0032687B1
Authority
EP
European Patent Office
Prior art keywords
embossed
high voltage
insulating
wound
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.)
Expired
Application number
EP81100116A
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German (de)
English (en)
Other versions
EP0032687A3 (en
EP0032687A2 (fr
Inventor
Günther Matthäus
Joachim Dr. Ruffer
Andreas Diller
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
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Publication date
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Application filed by Siemens AG filed Critical Siemens AG
Priority to AT81100116T priority Critical patent/ATE3343T1/de
Publication of EP0032687A2 publication Critical patent/EP0032687A2/fr
Publication of EP0032687A3 publication Critical patent/EP0032687A3/de
Application granted granted Critical
Publication of EP0032687B1 publication Critical patent/EP0032687B1/fr
Expired legal-status Critical Current

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    • 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 conductor parts at different electrical potentials and with a wound insulation body arranged between these conductor parts, which contains layers of embossed insulating foils made of a plastic material that shrinks above a predetermined temperature and electrically conductive potential control inserts, and is impregnated with a special insulating medium.
  • a high-voltage bushing is known from the publication “Third International Symposium on High Voltage Engineering”, Milan (Italy), August 28-31, 1979, report 32.09.
  • connection points of electrical devices with high operating voltages of, for example, 100 kV and higher high-voltage parts of these devices must be passed through parts which are at ground potential in such a way that arcing between these parts is avoided with certainty.
  • a corresponding connection point is, for example, the end closure of a high-voltage cable or the connection of a high-voltage transformer.
  • Corresponding insulated bushings may also be required for converters and switchgear.
  • the electrically conductive parts in the high-voltage bushings which are at high voltage potential, are surrounded by special bushing insulators, the geometric dimensions of which are determined, among other things, by the required electrical strength values.
  • the bushing insulator of a cable end closure known from the publication “Third International Symposium on High Voltage Engineering” is wound from flexible polypropylene films.
  • so-called electrically conductive potential control systems are wound concentrically to one another and insulated from one another in this bushing insulator.
  • Gaps and cavities in the known winding should be filled with sulfur hexafluoride (SF e ) as the insulating medium, since it is known that the partial discharge field strength in SF 6 is at least twice as high as in air. The air in the winding must therefore be pumped out and replaced by SF e .
  • the known winding is not constructed from smooth, but from nubbed polypropylene films. Because of the knot, the gaps and cavities present in the winding are practically interconnected and can thus be more easily evacuated and then filled with the insulating medium.
  • embossed foils used for the known winding are only available with a relatively small width of, for example, 1 m, feedthroughs that are longer than this width, such as. B. in 420 kV bushings with a length of about 3 m, several webs of these foils are provided, which must be wound offset from one another.
  • the corresponding winding technology is accordingly complex.
  • the object of the present invention is to improve the wound insulation body of the known high-voltage bushing in such a way that its winding package has sufficient mechanical strength up to the generally occurring maximum operating temperatures of about 120 ° C and in particular cannot loosen and possibly even slip, if that High-voltage bushing is arranged vertically.
  • a certain shrinkage of these foils is anticipated by the thermal pretreatment of the embossed foils before the insulation body is wound.
  • the advantages achieved in this way are, in particular, that the winding produced scarcely shrinks under operating conditions up to the temperature selected for the thermal pretreatment, and a sufficiently high mechanical strength is thus achieved. Since the original embossing of the film is not completely eliminated during the thermal pretreatment, but largely remains, the insulation body wound with these films is relatively easy to evacuate and for an insulating medium, such as, for. B. SFg, sufficiently permeable.
  • FIG. 1 schematically illustrates a high-voltage bushing.
  • 2 schematically shows a part of this high-voltage bushing designed according to the invention.
  • a longitudinal section z. B. from a part of the end closure of a high-voltage cable, as is known from the publication "Third International Symposium on High Voltage Engineering", Milan, Italy, 28th-31st August 1979, report 32.09.
  • the implementation contains a central conductor 2, the z. B. is a steel or aluminum tube and is at high voltage potential, for example 200 kV at 50 Hz.
  • An insulating body 3 is arranged concentrically around the conductor, which has two beveled conical lateral surfaces 4 and 5 and a cylindrical lateral surface 6 in between. This insulation body is wound from insulating films made of a predetermined plastic material.
  • capacitor inserts 7 to 10 are arranged concentrically to one another and isolated from one another, which are indicated in the figure by lines parallel to the axis.
  • These capacitor inserts which serve for potential control, are expediently arranged in such a way that an approximately linear potential gradient can form from inside to outside along the bevelled side surfaces 4 and 5 of the insulating body 3.
  • the approximately linear potential characteristic on the side surfaces 4 and 5 can be achieved in a known manner by a suitable choice of the radial distances between the individual capacitor inserts and by their axial lengths (cf. US-A-3462545).
  • the innermost near the conductor and designated 8 and 9 capacitor deposits are z. B. at high voltage potential, while the outermost capacitor insert 10 is on the outer surface 6 with an electrical connection 11 to ground potential.
  • Suitable media are e.g. B. special oils or in particular gases such as SF 6 or N 2 . According to the exemplary embodiment according to the figure, an SF 6 impregnation of the insulation body is assumed (cf. SIGRE 1972, Paper N ° 15-02).
  • the insulation body can also be covered by a cryogenic medium such as, for. B. be impregnated with helium (see. DE-A-2 327 629).
  • the insulation body 3 is at least partially wound from embossed plastic films.
  • the corresponding design of the insulation body 3 is shown in more detail in FIG. 2, in which a corresponding section of the insulation body, designated 12 in FIG. 1, is shown enlarged. 1 corresponding parts are provided with the same reference numerals.
  • the insulation body 3 of a high-voltage bushing according to the invention contains, among other things, several wound layers of smooth insulation foils, some of which are denoted by 14 in the figure.
  • Polypropylene or polyethylene for example, is suitable as the film material. Since such foils are to be produced with a width corresponding to the length of the bushing insulator, these layers can expediently be wound from a single foil in order to avoid bumps or overlaps within one layer.
  • each two layers of the smooth insulation foils 14 there is a layer of embossed insulation foils, some of which are denoted by 15 in the figure.
  • These foils are provided with a knot, they contain between 300 and 700, preferably about 500 knobs / cm 2 . According to the representation according to the figure, it is assumed that all the knobs of the insulating films 15 in the section 12 shown are detected with the longitudinal section.
  • the insulation films 15 consist of a plastic material such as. B. polypropylene, which shows signs of shrinkage above a predetermined temperature, which is exceeded in the operating case of the insulating body.
  • embossed foils can e.g. B. be prepared by starting from a 40 j.Lm thick polypropylene film, which is provided in a calender at temperatures between about 120 and 150 ° C to 60 to 80 j.Lm total thickness with the knobs.
  • the shrinkage of these knobs which can already be observed at temperatures above 80 ° C., is at least largely anticipated according to the invention by thermal pretreatment at temperatures between 80 and 125 ° C., preferably between 100 and 120 ° C., before winding.
  • the pretreatment temperature is chosen so that it is close to the in Operating case of the high-voltage bushing lies in the insulation body 3 at the maximum temperature.
  • a pretreatment temperature is preferably provided, which corresponds approximately to the maximum temperature occurring in the insulation body 3 during operation of the high-voltage bushing.
  • the shrinkage of the knobs achieved in this way should not exceed half the difference in thickness between the total thickness of the embossed but thermally untreated films and the thickness of a corresponding film without embossing. With these measures it is achieved that the winding hardly shrinks up to this temperature and so a mechanical strength is sufficiently high.
  • the total thickness of the embossed foils after the thermal shrinkage treatment should be at least 20% greater than the thickness of a corresponding foil without embossing, sufficient permeability of the insulating body 3 for the insulating medium, such as, for. B. for the SF e gas guaranteed.
  • the cavities formed by the knobs of the foils 15 and designated 16 in the figure are then filled with the insulating medium.
  • embossed insulation foils 15 are only available with a relatively small width of, for example, 1 m, in the case of insulation bodies which are longer than 1 m, several webs are required which are expediently wound in a mutually offset manner.
  • the embossed foils of a layer can advantageously be wound together. Such a winding can be carried out without any particular technical difficulties.
  • some corresponding joints are indicated and designated 17.
  • a capacitor control insert designated by 10 can also be seen.
  • This capacitor control insert can for example be a thin foil made of a metal, such as. B. aluminum. Films made of a plastic such as polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP) or polycarbonate (PC) are also suitable as potential control deposits.
  • PVC polyvinyl chloride
  • PE polyethylene
  • PP polypropylene
  • PC polycarbonate
  • the high-voltage bushing according to the invention is also suitable for electrical devices in which high-voltage potential is present on the outside and earth potential on the inside.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Bodies (AREA)
  • Insulators (AREA)

Claims (8)

1. Traversée haute tension, comportant des éléments de conducteurs portés à des potentiels électriques différents, ainsi qu'un corps isolant bobiné (3) disposé entre ces éléments de conducteurs et comportant des couches de feuilles isolantes gaufrées (15) d'une matière plastique rétractable au-dessus d'une température prédéterminée ainsi que des intercalaires (7 à 10) électriquement conducteurs et contrôlant le potentiel, et qui est imprégné d'un milieu isolant, caractérisée par des feuilles isolantes gaufrées (15) qui, avant l'opération de formation de la bobine, ont été soumises à un traitement thermique de retrait.
2. Traversée haute tension selon la revendication 1, caractérisée par le fait qu'entre les couches de feuilles isolantes gaufrées (15), on prévoit respectivement une couche de feuilles isolantes lisses (14).
3. Traversée haute tension selon la revendication 1 ou 2, caractérisée par un retrait de chaque feuille isolante (15) égale à au moins la moitié de la différence d'épaisseur entre l'épaisseur totale des feuilles gaufrées et non encore traitées thermiquement et l'épaisseur d'une feuille correspondante sans gaufrage.
4. Traversée haute tension selon l'une des revendications 1 à 3, caractérisée par des feuilles isolantes gaufrées (15) en polypropylène à 300 à 700, de préférence à 500 rugosités/cm2.
5. Traversée haute tension selon l'une des revendications 1 à 4, caractérisée par un traitement thermique de retrait à une température qui est au moins voisine à la température maximale qui apparaît, dans le cas du fonctionnement de la traversée haute tension, dans le corps isolant de cette dernière.
6. Traversée haute tension selon la revendication 5, caractérisée par un traitement thermique de retrait à une température supérieure à 80 °C, de préférence supérieure à 100 °C.
7. Traversée haute tension selon la revendication 5 ou 6, caractérisée par un traitement thermique de retrait à une température située en dessous de 125 °C, de préférence en dessous de 120 °C.
8. Traversée haute tension selon l'une des revendications 1 à 7, caractérisée par des feuilles isolantes gaufrées (15) dont l'épaisseur totale respective, après le traitement thermique de retrait, est au moins de 20 %, supérieure à l'épaisseur d'une feuille correspondante non gaufrée.
EP81100116A 1980-01-18 1981-01-09 Traversée haute-tension comportant des couches de feuilles isolantes imprimées Expired EP0032687B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81100116T ATE3343T1 (de) 1980-01-18 1981-01-09 Hochspannungsdurchfuehrung mit lagen aus gepraegten isolierfolien.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3001779 1980-01-18
DE3001779A DE3001779C2 (de) 1980-01-18 1980-01-18 Hochspannungsdurchführung mit Lagen aus geprägten Isolierfolien

Publications (3)

Publication Number Publication Date
EP0032687A2 EP0032687A2 (fr) 1981-07-29
EP0032687A3 EP0032687A3 (en) 1981-11-18
EP0032687B1 true EP0032687B1 (fr) 1983-05-11

Family

ID=6092421

Family Applications (1)

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EP81100116A Expired EP0032687B1 (fr) 1980-01-18 1981-01-09 Traversée haute-tension comportant des couches de feuilles isolantes imprimées

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US (1) US4362897A (fr)
EP (1) EP0032687B1 (fr)
AT (1) ATE3343T1 (fr)
DE (1) DE3001779C2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6951987B1 (en) 2003-01-31 2005-10-04 United States Of America As Represented By The Secretary Of The Navy High voltage bushing
EP1939897A1 (fr) * 2006-12-28 2008-07-02 ABB Research Ltd. Structure isolante dotée d'écrans formant un champ électrique
CH698971A1 (de) * 2008-06-04 2009-12-15 Trench Switzerland Ag Isoliereinrichtung.
ATE509353T1 (de) 2008-10-27 2011-05-15 Abb Research Ltd Hochspannungsdurchführung
WO2011154029A1 (fr) * 2010-06-07 2011-12-15 Abb Research Ltd Capteur de haute tension doté d'électrodes se chevauchant axialement

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH405450A (de) * 1961-02-17 1966-01-15 Moser Glaser & Co Ag Verfahren zur Herstellung eines kondensator-gesteuerten Giessharz-Isolierkörpers um einen elektrischen Leiter
DE6937778U (de) * 1969-09-26 1972-06-15 Siemens Ag Spulenwicklung.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB991546A (en) * 1960-03-25 1965-05-12 Reyrolle A & Co Ltd Improvements relating to high-voltage insulation and insulating components
US3397098A (en) * 1962-03-15 1968-08-13 Moser Glaser & Co Ag Method of making insulating bodies
US3462545A (en) * 1967-01-13 1969-08-19 Westinghouse Electric Corp Condenser bushing
US3430116A (en) * 1967-12-06 1969-02-25 Hercules Inc Electrical capacitors
US3991451A (en) * 1968-10-04 1976-11-16 Tokyo Denki Kabushiki Kaisha Method of making a fluoride film capacitor
CH533377A (de) * 1971-04-29 1973-01-31 Gen Cable Corp Isolierte Kabelverbindungsanordnung und Verfahren zum Herstellen derselben
DE2327629A1 (de) * 1973-05-30 1974-12-12 Siemens Ag Durchfuehrungsisolator fuer hochspannungseinrichtungen und verfahren zu seiner herstellung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH405450A (de) * 1961-02-17 1966-01-15 Moser Glaser & Co Ag Verfahren zur Herstellung eines kondensator-gesteuerten Giessharz-Isolierkörpers um einen elektrischen Leiter
DE6937778U (de) * 1969-09-26 1972-06-15 Siemens Ag Spulenwicklung.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"3rd. International Symposium on High Voltage Engineering" Bericht 32.09 (Aug. 1979) *

Also Published As

Publication number Publication date
US4362897A (en) 1982-12-07
EP0032687A3 (en) 1981-11-18
DE3001779A1 (de) 1981-07-23
ATE3343T1 (de) 1983-05-15
DE3001779C2 (de) 1987-01-02
EP0032687A2 (fr) 1981-07-29

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