EP2431983A1 - Traversée haute tension et procédé de fabrication d'une traversée haute tension - Google Patents

Traversée haute tension et procédé de fabrication d'une traversée haute tension Download PDF

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Publication number
EP2431983A1
EP2431983A1 EP10177799A EP10177799A EP2431983A1 EP 2431983 A1 EP2431983 A1 EP 2431983A1 EP 10177799 A EP10177799 A EP 10177799A EP 10177799 A EP10177799 A EP 10177799A EP 2431983 A1 EP2431983 A1 EP 2431983A1
Authority
EP
European Patent Office
Prior art keywords
winding
insulator
capacitor
conductor
fiber
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Withdrawn
Application number
EP10177799A
Other languages
German (de)
English (en)
Inventor
Jens Rocks
Walter Odermatt
Ansgar Dais
Daniel Egger
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.)
ABB Technology AG
Original Assignee
ABB Technology 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 ABB Technology AG filed Critical ABB Technology AG
Priority to EP10177799A priority Critical patent/EP2431983A1/fr
Publication of EP2431983A1 publication Critical patent/EP2431983A1/fr
Withdrawn legal-status Critical Current

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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
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/32—Single insulators consisting of two or more dissimilar insulating bodies
    • H01B17/325—Single insulators consisting of two or more dissimilar insulating bodies comprising a fibre-reinforced insulating core member

Definitions

  • the present invention relates to a high voltage feedthrough according to the preamble of claim 1.
  • the invention also relates to a method for producing a high voltage feedthrough according to the preamble of claim 8.
  • a high voltage bushing of the aforementioned type connects a conductor arranged in a metal-clad component of a high-voltage installation and insulated with a liquid or gaseous insulating material from the metal enclosure with an external conductor which is generally insulated by the surrounding air but which is also connected to another insulating means such as For example, a solid, oil or SF 6 , may be isolated and may be part of a high voltage cable, a cable end closure, a cable sleeve or a gas-insulated switchgear.
  • a typical embodiment of such a bushing includes a field-controlling capacitor winding which is wound onto a round body designed as a metal solid or hollow cylinder.
  • the capacitor winding comprises an insulating film formed of paper or plastic, into which capacitor pads 41 are inserted at certain intervals during winding. The insertion can be done by inserting metal foils, such as based on aluminum or by printing conductive material on the insulating film.
  • the capacitor pads are then arranged in the form of concentric cylinders.
  • the lengths of the capacitor pads are graded so that the capacitances between two successive pads are substantially equal. Therefore, larger diameter capacitor pads have a shorter length in the axial direction. It is thus achieved with the capacitor winding a finely graded control of an electric field, which in operation of the implementation between a high-voltage potential located at the current conductor and the Metal encapsulation of the component, which is typically designed as a transformer acts.
  • a portion of the capacitor coil is enveloped by a shield made of a porcelain or a polymer, in particular silicone, for protection against external influences, such as weather, pollution and radiation.
  • the mechanical installation of the implementation in the component, for example in a transformer, is carried out by means of a mounting flange which is fixed to an insulator containing the capacitor winding.
  • Bushings of the type mentioned are described for example in EP 1 284 484 B1 .
  • EP 1 771 866 B1 and WO 2009/053147 A1 The bushings described are each intended for installation in a metal housing of a high-voltage electrical apparatus, for example a transformer, and each have a capacitor winding integrated in an insulator. Attached to the insulator is a mounting flange which separates a portion of the capacitor coil located above the mounting flange from a portion of the capacitor coil located below the mounting flange and, after installation of the leadthrough into the apparatus, in an insulator devoid of air, typically oil or SF 6 , is arranged.
  • a region of these bushings exposed to the surrounding air in each case has a shield which acts as weather and radiation protection and which encloses the section of the capacitor winding located above the mounting flange.
  • the shielding can be like in EP 1 284 484 B1 and EP 1 771 689 B1 may be integrated into a porcelain insulator or made of silicone and fastened on a fiber-reinforced plastic pipe. But it can also be like in EP 1 417 689 B1 and WO 2009/053147 A1 described immediately extended to the between the mounting flange and a power connector of the implementation Be applied outside surface of the capacitor winding receiving insulator.
  • the object is to provide a high-voltage bushing of the type mentioned above, which is characterized despite a compact design by a high reliability, and to provide a method by which a high-voltage bushing of the type mentioned can be manufactured in a simple and economical way.
  • a high-voltage bushing which has a guided along an axis conductor in a coaxial arrangement and an insulator attached to the conductor and the current conductor insulator, a capacitor integrated in the capacitor capacitor winding with mutually electrically insulated capacitor pads in the radial direction by a the axis wound insulating foil are spaced from each other, a mounting flange fixed to the insulator and a comprehensive insulator, along the axis of the mounting flange to a terminal of the conductor guided shielding.
  • a gain is integrated with a wound on the capacitor winding filament winding.
  • the fiber and capacitor windings are embedded in an electrically insulating matrix of a cured polymer mass.
  • the shield is applied to the reinforcement.
  • the filament winding and the hardened polymer mass co-embedding the fiber and capacitor windings substantially reinforce the insulator.
  • the reinforcement formed from the fiber winding and the part of the polymer mass which embeds this winding a compact construction and a mechanically stable design of the bushing according to the invention are achieved by simple means.
  • the mechanical stabilization of the capacitor winding significantly reduces its strength reduced by the high brittleness of the cured polymer at low temperatures.
  • penetration of moisture is avoided, since the reinforcement surrounding the capacitor winding acts as a diffusion barrier and, if appropriate, keeps diffusing water away from the capacitor winding acting as a device for controlling the electric field by the shielding. An impairment of the electrical properties of the implementation as a result of penetrating into the capacitor winding water is thus avoided.
  • the implementation of the invention is therefore characterized by a high level of reliability.
  • the reinforcement may be at least partially integrated in at least one of the following sections of the insulator: a section located in an area of the duct exposed to ambient air, a section exposed in a component exposed to insulation Is arranged portion of the implementation, as well as in a guided through the mounting flange section.
  • the fiber wound used in the reinforcement may have at least one guided around the capacitor winding layer of a planar semi-finished fiber product, which advantageously has at least one fabric, a scrim, a mat or a nonwoven.
  • the capacitor winding may have an impregnating aid guided annularly around the axis, which is applied to the fiber winding and which is formed from a sheet-like insulating material which transmits the polymer compound before hardening.
  • This impregnation aid promotes the impregnation of the fiber coil with a later forming the matrix uncured polymer composition in the manufacture of the implementation.
  • the impregnation aid can be formed from additional turns of the insulating film.
  • the method according to the invention is used to produce a high-voltage feedthrough, which has a coaxial arrangement along a guided axis along a conductor and one attached to the conductor and the Conductor comprehensive insulator, a capacitor integrated in the insulator capacitor winding with mutually electrically insulated capacitor pads, which are held in the radial direction by an axis wound around the insulating foil from each other, a mounting flange attached to the insulator and an insulator comprehensive, along the axis of the mounting flange a connection of the conductor guided shielding.
  • the capacitor winding held on the conductor is placed in a mold, dried in the mold and impregnated in the mold with a curable, flowable polymer composition, the polymer composition is cured to form the insulator in the mold, and the mounting flange on a seat attached trained outside surface of the insulator and subsequently applied the shield on the insulator.
  • at least one fiber winding acting as reinforcement is applied to the capacitor winding.
  • bushings can be made with a capacitor winding in a particularly economical manner.
  • this is due to the fact that a winding device required for the production of the capacitor winding is at the same time also used to manufacture the fiber winding.
  • the capacitor winding and the fiber body in the mold are dried together, impregnated together with the flowable polymer composition and integrated by curing the polymer composition together in the forming during curing insulator. It is achieved with a few steps a reinforced by the fiber winding, protected from moisture capacitor winding, from which by subsequent attachment of the mounting flange and the shielding a high-quality implementation can be easily made.
  • an additional external insulator of a shielded porcelain or a shielded, fiber-reinforced plastic tube can therefore be omitted in manufacturing technology advantageous manner. Since the reinforcement containing the fiber winding is integrated into the capacitor winding containing the insulator, it is no longer necessary to fill a cavity otherwise enclosed by the additional external insulator with an insulating means increasing the dielectric strength of the leadthrough. At the same time, this is for a mechanical post-processing Reduced effort required because only the time required for attaching the mounting flange seat must be formed by machining in the capacitor winding receiving insulator.
  • annular impregnation aid guided annularly around the axis can be integrated prior to the application of the fiber coil, which forms an outer surface of the capacitor coil carrying the fiber wound and which contains a sheet-like semi-finished fiber which passes through the polymer mass before curing.
  • Fig.1 shown extending along the axis A contains in coaxial arrangement a guided along the axis A current conductor 10, an attached to the conductor and the conductor comprising insulator 20, a mounting flange 30 attached to the insulator 20, a capacitor 20 integrated in the capacitor winding 40 and a the insulator 20 comprehensive shield 50.
  • the current conductor 10 may, with its lower end, not shown, with a power connection of a conductor arranged in an insulator-filled metal housing conductor of an electrical apparatus, typically a transformer, be electrically connected. Its upper end formed by the power connection 11 can be electrically conductively connected to a generally air-insulated high-voltage conductor.
  • the shield 50 is guided along the axis A from the mounting flange 30 to a power terminal 11 of the conductor 10. It serves as weather and radiation protection and is formed by an elastomeric polymer, in particular based on silicone or EPDM.
  • the capacitor winding 40 has mutually electrically insulated capacitor pads 41, which are held in the radial direction by a wound in the form of a spiral insulating film 42, which is typically made of paper and / or plastic, at a distance from each other.
  • the capacitor winding 40 is used to control an electric field, which forms during operation of the implementation between the then located at high voltage potential conductor 10 and then located at the potential of the metal housing of the transformer mounting flange 30.
  • a reinforcement with an applied to the capacitor winding 40, tubular formed fiber winding 21 is integrated.
  • the reinforcement is at least partially integrated into a portion 22 of the insulator disposed in the part of the duct exposed to ambient air. It can be seen, however, that the reinforcement is also integrated in a section 23 of the bushing guided through the mounting flange 30. Alternatively, the reinforcement can also be integrated in only one of the two sections 22 or 23 or else in a section 24 of the insulator 20 situated below the mounting flange 30, that is to say in a region of the bushing exposed to the insulating means of the transformer.
  • the fiber winding 21 has at least a guided around the capacitor winding 40 layer of a planar fiber semi-finished product, which advantageously contains at least one fabric, a scrim, a mat or a nonwoven.
  • Suitable fibers are inorganic fibers, for example based on glass or basalt, or inorganic fibers, for example based on aramid.
  • the integrated in the capacitor winding 20 gain supports the generally comparatively brittle capacitor winding 40 and carries on its outside the mounting flange 30 as well as between the mounting flange 30 and power connector 11 extending shield 50th
  • impregnation aid 43 is integrated, on which the fiber winding 21 rests.
  • the impregnation aid 43 is also formed from a sheet-like semi-finished fiber which is permeable to a curable polymer composition before curing. It is applied to the insulating film 42, but may also be formed by additional outer turns of the insulating film 42.
  • the fiber winding 21, the impregnation aid 43, the insulating film 42 and the capacitor pads 41 are embedded in a matrix of the aforementioned, but hardened by curing polymer mass 25.
  • the polymer composition comprises a filled or unfilled polymer, typically based on an epoxy resin.
  • the filler used is generally a powder, for example based on SiO 2 or Al 2 O 3 .
  • capacitor winding 40 is completed by applying at least one turn of the permeable for the uncured polymer composition, planar semi-finished fiber product of the impregnation 43 to the outside.
  • the polymer composition 25 may additionally contain a powdered filler, such as based on quartz.
  • a powdered filler such as based on quartz. The addition of this filler is facilitated if the insulating film 42 and optionally also the capacitor pads 41 have openings through which the particles of the filler are passed during impregnation with the uncured polymer composition.
  • the fiber winding 43 carrying capacitor winding 40 is arranged in a mold, not shown, and dried in the mold. After drying, the assembly containing the two dried rolls 40 and 43 is impregnated in the mold with the uncured polymer composition.
  • the in the state of the art about in EP 1 771 866 B1 or in WO 2009/053147 A1 , described insulating film 42 and optionally also the capacitor pads 41 have permeable pores and channels for the polymer composition. Since the semifinished fiber product of the impregnation aid 43 is permeable to the uncured polymer composition, the capacitor winding 40 is thus quickly impregnated with this polymer composition.
  • the impregnating aid 43 rests with a large surface on the fiber winding 21 of the reinforcement and therefore, regardless of the pore structure of the fiber winding 21 very quickly polymer mass in the opposite its axial extent only a small radial thickness fiber winding 21.
  • the impregnation can even with the use of a high viscosity polymer mass are carried out quickly.
  • the polymer composition is cured in the mold to form the matrix and thus also to form the insulator 20 - generally at elevated temperatures.
  • a molded body containing the insulator 20 and the conductor 10 attached to the insulator is taken out of the mold.
  • the mounting flange 30 is typically fixed to the insulator 20 by gluing, cold shrinking or jamming. How out Fig.1 it can be seen, in the seat an annular guided around the axis shoulder 26 may be formed, on which the mounting flange 30 is placed from above and clamped by means of a guided from below against the shoulder 26 pressure ring 31. The required clamping force is guided by axially, off Fig.1 not obvious screws generated, which engage in the mounting ring 30 and press the mounting ring 30 from above and the pressure ring 31 from below against the shoulder 26 when screwing.
  • the mounting flange 30 carries on the seat supported sealing rings 32.
  • the shield 50 - as in WO 2009/053147 A1 described - be made by introducing elastomeric polymer into the mold.
  • the sealing rings prevent after installation of the implementation in the metal housing of the high voltage component, the penetration of air into the interior of the metal housing, respectively. the escape of oil from the housing in the space enclosed by the shield 50 volume.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)
  • Insulating Bodies (AREA)
EP10177799A 2010-09-21 2010-09-21 Traversée haute tension et procédé de fabrication d'une traversée haute tension Withdrawn EP2431983A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10177799A EP2431983A1 (fr) 2010-09-21 2010-09-21 Traversée haute tension et procédé de fabrication d'une traversée haute tension

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10177799A EP2431983A1 (fr) 2010-09-21 2010-09-21 Traversée haute tension et procédé de fabrication d'une traversée haute tension

Publications (1)

Publication Number Publication Date
EP2431983A1 true EP2431983A1 (fr) 2012-03-21

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EP10177799A Withdrawn EP2431983A1 (fr) 2010-09-21 2010-09-21 Traversée haute tension et procédé de fabrication d'une traversée haute tension

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EP (1) EP2431983A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105702452A (zh) * 2016-04-07 2016-06-22 赵雪雅 应用于高压电容器出线套管及其复合芯体
WO2017148159A1 (fr) * 2016-02-29 2017-09-08 北京瑞恒新源投资有限公司 Corps de noyau isolant de grande capacité, appareil électrique haute tension et traversée haute tension multifonction
DE102020200662A1 (de) 2020-01-21 2021-07-22 Siemens Aktiengesellschaft Hochspannungsdurchführung und Verfahren zu deren Herstellung
CN117059352A (zh) * 2023-10-13 2023-11-14 搏世因（北京）高压电气有限公司 一种胶浸纤维电容式干式套管及其制作方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB718555A (en) * 1952-06-13 1954-11-17 Permali Ltd Improvements in bushing insulators made from resin treated paper
CN2583773Y (zh) * 2002-04-19 2003-10-29 方静 干式高压套管
EP1953771A1 (fr) * 2007-01-31 2008-08-06 Abb Research Ltd. Élément d'isolation électrique, traversée comportant un tel dispositif, et procédé de production d'un tel élément
WO2009053147A1 (fr) * 2007-10-26 2009-04-30 Abb Research Ltd Traversée externe haute tension
EP1771866B1 (fr) * 2004-07-28 2009-12-23 Abb Research Ltd. Traversée haute tension

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB718555A (en) * 1952-06-13 1954-11-17 Permali Ltd Improvements in bushing insulators made from resin treated paper
CN2583773Y (zh) * 2002-04-19 2003-10-29 方静 干式高压套管
EP1771866B1 (fr) * 2004-07-28 2009-12-23 Abb Research Ltd. Traversée haute tension
EP1953771A1 (fr) * 2007-01-31 2008-08-06 Abb Research Ltd. Élément d'isolation électrique, traversée comportant un tel dispositif, et procédé de production d'un tel élément
WO2009053147A1 (fr) * 2007-10-26 2009-04-30 Abb Research Ltd Traversée externe haute tension

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017148159A1 (fr) * 2016-02-29 2017-09-08 北京瑞恒新源投资有限公司 Corps de noyau isolant de grande capacité, appareil électrique haute tension et traversée haute tension multifonction
US10732204B2 (en) 2016-02-29 2020-08-04 Beijing Ruiheng Xinyuan Investment Co., Ltd Large-capacitance insulating core, high-voltage electrical appliance and multi-functional high-voltage bushing
CN105702452A (zh) * 2016-04-07 2016-06-22 赵雪雅 应用于高压电容器出线套管及其复合芯体
DE102020200662A1 (de) 2020-01-21 2021-07-22 Siemens Aktiengesellschaft Hochspannungsdurchführung und Verfahren zu deren Herstellung
CN117059352A (zh) * 2023-10-13 2023-11-14 搏世因（北京）高压电气有限公司 一种胶浸纤维电容式干式套管及其制作方法
CN117059352B (zh) * 2023-10-13 2024-01-30 搏世因（北京）高压电气有限公司 一种胶浸纤维电容式干式套管及其制作方法

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