EP4297051A1 - Isolateur de traversée - Google Patents

Isolateur de traversée Download PDF

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Publication number
EP4297051A1
EP4297051A1 EP23178447.1A EP23178447A EP4297051A1 EP 4297051 A1 EP4297051 A1 EP 4297051A1 EP 23178447 A EP23178447 A EP 23178447A EP 4297051 A1 EP4297051 A1 EP 4297051A1
Authority
EP
European Patent Office
Prior art keywords
base body
insulator
field control
control material
bushing insulator
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.)
Pending
Application number
EP23178447.1A
Other languages
German (de)
English (en)
Inventor
Katrin Benkert
Radu-Marian Cernat
Thomas Heinz
Karsten JUHRE
Peter Milewski
Paul Gregor Nikolic
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 Energy Global GmbH and Co KG
Original Assignee
Siemens Energy Global GmbH and Co KG
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 Siemens Energy Global GmbH and Co KG filed Critical Siemens Energy Global GmbH and Co KG
Publication of EP4297051A1 publication Critical patent/EP4297051A1/fr
Pending 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

Definitions

  • the invention relates to a feedthrough insulator.
  • Bushing insulators are used, for example, as so-called bulkhead insulators in connections of housing parts of electrical energy transmission devices. Furthermore, bushing insulators are used, for example, for bushings of electrical energy transmission devices, through which, for example, electrical conductors are led out of housings of the electrical energy transmission devices.
  • sulfur hexafluoride is often used as an insulating gas, particularly due to the high dielectric strength of sulfur hexafluoride.
  • sulfur hexafluoride (SF 6 ) is a powerful greenhouse gas. That is why sulfur hexafluoride is increasingly being replaced by more environmentally friendly insulating gases, for example artificial air, also known as clean air.
  • Artificial air refers to a mixture of oxygen and nitrogen that is produced artificially. This can be a completely synthetically produced mixture of oxygen and nitrogen or treated, in particular purified and/or dehumidified, air. Artificial air is a particularly environmentally friendly alternative to sulfur hexafluoride.
  • fluorinated gas mixtures are used in order to achieve a similar dielectric strength as when using SF 6 .
  • the long-term stability of the gas mixtures and effects caused by material interactions within the switching devices and switchgear are not sufficiently assured at this point in time. Due to their harmfulness to the climate and persistence in the environment, the use of fluorine-containing alternatives carries the risk of future use restrictions and bans, for example as part of the revision of the European F-Gas Regulation 2021/2022.
  • the invention is based on the object of specifying an improved bushing insulator for gas-insulated electrical energy transmission devices.
  • a feedthrough insulator has a base body with at least one opening which is suitable for feeding through at least one electrical conductor.
  • the feedthrough insulator is made of an electrically insulating main material and at least one field control material different from the main material.
  • the field control material is designed and/or arranged in such a way that it influences an electric field penetrating and surrounding the feedthrough insulator.
  • the invention therefore supplements a bushing insulator, for example a bushing or a bulkhead insulator, in gas-insulated switchgear by field control mechanisms in various embodiments to increase the dielectric strength in clean air.
  • the base body is made from the main material with an admixture of an electrically conductive varistor material as field control material.
  • the varistor material has zinc oxide.
  • the base body has at least one electrode layer made of an electrically conductive field control material embedded in the main material.
  • the base body is made from the main material with an admixture of dielectric field control material that increases its permittivity.
  • the dielectric field control material includes barium titanate and/or aluminum oxide.
  • the concentration of the dielectric field control material in the base body can vary spatially.
  • the main material is a casting resin or a silicone, or a casting resin or a silicone with an admixture of at least one filler, for example with an admixture of aluminum nitride and/or boron nitride as a filler.
  • At least one electrode runs around the base body.
  • the base body is connected in a gas-tight manner to each electrical conductor which is guided through an opening in the base body.
  • FIG 1 shows a first exemplary embodiment of a feedthrough insulator 1 in a schematic sectional view.
  • the bushing insulator 1 is designed as a bulkhead insulator in the connection of two housing parts 2, 3 of a housing 4 of an electrical energy transmission device.
  • the housing parts 2, 3 can both be designed to be electrically conductive, in particular metallic, or electrically insulating.
  • a housing part 2, 3 is designed to be electrically conductive, in particular metallic, and the other housing part 2, 3 is designed to be electrically insulating.
  • the feedthrough insulator 1 has a base body 5 with at least one opening 6. An inner conductor 7 of the electrical energy transmission device is guided through each opening 6.
  • the base body 5 encloses each inner conductor 7 guided through it in a gas-tight manner.
  • the base body 5 is made of an electrically insulating main material 8.
  • the main material 8 is, for example, a casting resin or an insulation material with admixtures to adjust the thermal conductivity and thermal expansion of the material, for example aluminum nitride (AlN) or boron nitride (BN).
  • An outer surface of the base body 5 is at least partially coated with a coating 11 made of a semiconducting field control material 10.
  • the coating 11 serves to control the field of an electric field penetrating and surrounding the feedthrough insulator 1.
  • the coating 11 is advantageous when contaminated by switching dust or decomposition products.
  • FIG 2 shows a second exemplary embodiment of a feedthrough insulator 1.
  • This exemplary embodiment differs from that in Figure 1 shown embodiment only in that the base body 5 of the feedthrough insulator 1 has no coating 11, but is made from the main material 8 with an admixture of an electrically conductive varistor material as field control material 10.
  • the varistor material is, for example, zinc oxide (ZnO).
  • FIG 3 shows a third exemplary embodiment of a feedthrough insulator 1. This exemplary embodiment differs from that in Figure 1 shown embodiment only in that the base body 5 of the feedthrough insulator 1 does not have a coating 11, but in the main material 8 embedded electrode layers 12 made of an electrically conductive field control material 10.
  • FIG 4 shows a fourth exemplary embodiment of a bushing insulator 1.
  • This exemplary embodiment differs from that in Figure 1 shown embodiment only in that the base body 5 of the bushing insulator 1 has no coating 11, but electrodes 13 are inserted at free or controlled intermediate potentials in the bulkhead insulator or the bushing or in the vicinity of conductive parts of the gas-insulated switchgear.
  • FIG 5 shows a fifth exemplary embodiment of a feedthrough insulator 1.
  • This exemplary embodiment differs from that in Figure 1 shown embodiment only in that the base body 5 of the feedthrough insulator 1 has no coating 11, but the base body 5 is made from the main material 8 with an admixture of a dielectric field control material 10 that increases its permittivity.
  • a dielectric field control material 10 that increases its permittivity.
  • epoxy resin is used as the main material 8 with barium titanate as the dielectric filler 10. This increases the dielectric constant of the material and thus reduces the field load.
  • it is also possible to specifically introduce a gradient of barium titanate admixture for example by additionally admixing additives, for example aluminum oxide, or by adjusting the concentration of the barium titanate).
  • FIG 6 shows a sixth exemplary embodiment of a feedthrough insulator 1.
  • This exemplary embodiment differs from that in Figure 1 shown embodiment only in that the feedthrough insulator 1 instead of the coating 11 has a casing 14 which has a section of an inner conductor 7 in the area of a connection point 15 and an area of the surface of the base body 5 adjacent to this section of the inner conductor 7.
  • the casing 14 is, for example, a silicone shell, in particular a silicone matrix, which can contain admixtures of fillers, for example AlN (aluminum nitrite) or BN (boron nitrite), in order to improve the thermal conductivity of the silicone.
  • fillers for example AlN (aluminum nitrite) or BN (boron nitrite
  • ⁇ r for example barium titanate

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  • Insulators (AREA)
EP23178447.1A 2022-06-21 2023-06-09 Isolateur de traversée Pending EP4297051A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022206149.7A DE102022206149A1 (de) 2022-06-21 2022-06-21 Durchführungsisolator

Publications (1)

Publication Number Publication Date
EP4297051A1 true EP4297051A1 (fr) 2023-12-27

Family

ID=86760518

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23178447.1A Pending EP4297051A1 (fr) 2022-06-21 2023-06-09 Isolateur de traversée

Country Status (2)

Country Link
EP (1) EP4297051A1 (fr)
DE (1) DE102022206149A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2157388A1 (de) * 1971-11-19 1973-05-24 Kabel & Lackdrahtfab Gmbh Isolierstuetzer fuer rohrgaskabel
DE4007337A1 (de) * 1990-03-08 1991-09-12 Asea Brown Boveri Elektrischer isolator
EP0810705A2 (fr) * 1996-05-30 1997-12-03 Abb Research Ltd. Isolateur
US20050199418A1 (en) * 2004-03-15 2005-09-15 Abb Research Ltd. High voltage bushing with field control material
US20220172865A1 (en) * 2019-03-29 2022-06-02 Tai Han Electric Wire Co., Ltd. Dry-type plug-in bushing, manufacturing method of the same, and high-voltage installation comprising same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1615040U (de) 1950-09-02 1950-10-26 Emil Wilkes Entlueftungs- und kuehlschrankplatte.
DE102008009333A1 (de) 2008-02-14 2009-08-20 Lapp Insulator Gmbh & Co. Kg Feldgesteuerter Verbundisolator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2157388A1 (de) * 1971-11-19 1973-05-24 Kabel & Lackdrahtfab Gmbh Isolierstuetzer fuer rohrgaskabel
DE4007337A1 (de) * 1990-03-08 1991-09-12 Asea Brown Boveri Elektrischer isolator
EP0810705A2 (fr) * 1996-05-30 1997-12-03 Abb Research Ltd. Isolateur
US20050199418A1 (en) * 2004-03-15 2005-09-15 Abb Research Ltd. High voltage bushing with field control material
US20220172865A1 (en) * 2019-03-29 2022-06-02 Tai Han Electric Wire Co., Ltd. Dry-type plug-in bushing, manufacturing method of the same, and high-voltage installation comprising same

Also Published As

Publication number Publication date
DE102022206149A1 (de) 2023-12-21

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