EP1577904A1 - Traversée haute tension avec élément pour les contrôle du champ électrique - Google Patents

Traversée haute tension avec élément pour les contrôle du champ électrique Download PDF

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Publication number
EP1577904A1
EP1577904A1 EP04405151A EP04405151A EP1577904A1 EP 1577904 A1 EP1577904 A1 EP 1577904A1 EP 04405151 A EP04405151 A EP 04405151A EP 04405151 A EP04405151 A EP 04405151A EP 1577904 A1 EP1577904 A1 EP 1577904A1
Authority
EP
European Patent Office
Prior art keywords
field control
control element
field
mounting flange
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.)
Granted
Application number
EP04405151A
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German (de)
English (en)
Other versions
EP1577904B1 (fr
Inventor
Lise Donzel
Felix Greuter
Hansjoerg Gramespacher
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 Research Ltd Switzerland
Original Assignee
ABB Research Ltd Switzerland
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 Research Ltd Switzerland filed Critical ABB Research Ltd Switzerland
Priority to EP04405151A priority Critical patent/EP1577904B1/fr
Priority to AT04405151T priority patent/ATE546818T1/de
Priority to US11/079,858 priority patent/US7262367B2/en
Publication of EP1577904A1 publication Critical patent/EP1577904A1/fr
Application granted granted Critical
Publication of EP1577904B1 publication Critical patent/EP1577904B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges

Definitions

  • the invention relates to the field of high or Medium voltage technology, in particular electrical Insulation and connection technology for grounded high-voltage apparatus. It starts from a dielectric Passage and a high voltage electrical apparatus according to the preamble of the independent claims.
  • the invention relates to a prior art, such as it is known from WO 02/065486 A1.
  • the field-controlling coating consists from varistor powder, z. B. from doped zinc oxide (ZnO), which is embedded in a polymer matrix.
  • the FGM coating serves to even out the field distribution on the insulator surface and is distributed so that part of the material with both the ground electrode as well as with the high voltage electrode in electrical Contact stands. In this case, the FGM coating can Cover insulator length only partially and in the field loaded Electrode regions to be concentrated.
  • the FGM coating can be applied to the insulator surface can be incorporated there into a shield be or can by a weatherproof, electrically insulating Protective layer to be shielded to the outside.
  • a Equalization of the capacitive field load can characterized by alternating horizontal stripes or bands FGM coating and insulator material can be realized.
  • the FGM coating in shape a glaze or a paint applied or in a porridge or mixed in clay, on the porcelain insulator applied and there to a glaze or a ceramic layer be burned.
  • the matrix for the FGM coating a polymer, an adhesive, a Casting compound or a mastic or gel.
  • EP 1 042 756 describes a glass fiber reinforced insulator tube disclosed on the inner surface and optionally also outer surface is impregnated with a resin, which is a particulate filler with varistor properties, in particular zinc oxide.
  • the GRP pipe can be made by winding a fiberglass net be, at least on the outer layers with the varistor-filled resin is impregnated.
  • FIG. 3.151 a feedthrough with a ground-side shielding electrode arranged inside the insulator tube is indicated.
  • the shielding electrode By the shielding electrode, a field control is achieved in the region of the ground-side mounting flange such that the heavily field-loaded zone is field-relieved at the transition from flange to insulator.
  • Such internal shielding electrodes are in pressure gas-insulated bushings, z. B.
  • the insulator comprises an insulator body Porcelain or composite material and a shield made of Porcelain or silicone.
  • the shield has a variable Insulator screen density on.
  • Isolatorend Scheme is turn the known shield electrode between insulator body and conductor available. It is now proposed in the heavily field-loaded Area where the shield electrode ends, an increased number of insulating screens. Due to the increased insulator screen density will provide improved field relief in the End region of the shield electrode achieved.
  • Object of the present invention is to provide an improved dielectric implementation and an electrical High voltage apparatus and an electrical switchgear with indicate such an implementation. This task will according to the invention by the features of the independent claims solved.
  • the invention consists in a dielectric implementation, in particular a high-voltage bushing for a high voltage electrical apparatus, comprising a Insulator part with a first mounting flange and a second mounting flange for mounting the bushing, wherein within the implementation in a field loading zone in the Area of the first mounting flange one for a desired Voltage level required shielding omitted is and instead for the purpose of field control in the field loading zone a nonlinear electrical and / or dielectric field control element on the insulator part is present in the region of the first mounting flange.
  • a nonlinear electrical and / or dielectric field control element on the insulator part is present in the region of the first mounting flange.
  • the field control material in terms of its nonlinear electrical and / or dielectric properties, its geometric Shape and its arrangement on the insulator part for the dielectric relief of the field loading zone without Shielding electrode for all operating conditions, in particular for surge voltages, designed.
  • the field control can thus also the most critical field loading conditions without Master shielding electrode or shielding electrodes.
  • design criteria for electrical design of the field control material indicated by a advantageous field control can be realized.
  • Claim 6 indicates how with the field control on Simple way DC feedthroughs are built can.
  • the embodiment according to claim 7 has the advantage that in particular the highest field loads in the range the Erdflansches with the field control material manageable are.
  • the embodiments according to claim 8 and 9 have the Advantage that both flange regions through the field control materials independently from rollovers or Partial discharges are protected.
  • Claim 10a gives various radial positions to the arrangement of the field control material on the insulator part.
  • claim 10b has the advantage that a conventional GRP pipe (fiberglass reinforced plastic) or a conventional one Porcelain insulator by a self-supporting FGM pipe (Field control material tube) is replaceable.
  • Claim 11 gives advantageous material components for the Field control.
  • Claims 12 and 13 relate to a high voltage electrical apparatus and comprising an electrical switchgear an inventive implementation with the above Benefits.
  • Fig. 1a shows a conventional gas-insulated dielectric feedthrough 1, in particular a high voltage feedthrough 1 for a high voltage electrical apparatus.
  • the bushing 1 comprises an insulator part 2; 2a, 2b with a first ground-side mounting flange 4 for mounting the bushing 1 on a grounded housing 5 of an electrical apparatus (not shown) and a second voltage-side mounting flange 8 for mounting the bushing 1 to a high voltage part (not shown).
  • the insulator part 2; 2a, 2b has a gas space 20 for an insulating gas 20 in the interior.
  • the gas space 20 contains a dielectrically insulating gas 20, e.g. As air, compressed air, nitrogen, SF 6 or similar gas.
  • the gas-insulated bushing 1 is thus hollow, typically hollow cylindrical, with an axis 3a, for receiving an electrical part 3 or at least one electrical conductor 3 in the gas space 20.
  • the bushing 1 is usually used to connect the encapsulated electrical apparatus to ground potential 5 at High or medium voltage network.
  • an internal shielding electrode 6, 6a is necessarily present in order to achieve field relief in the field-loaded zone 7, 7a at the lower ground flange 4 and to reduce or avoid partial discharges and flashovers.
  • the shielding electrode 6, 6a is typically in electrical contact 46 with the ground flange 4. It protrudes into the gas space 20 and tapers generally conically upwards.
  • Fig. 1b shows an example of a solid-insulated Procedure 1 according to the prior art.
  • the insulator part 2, 2b as inside full-volume filled resin body 2 executed with an optional shield 2b.
  • the insulator part 2, 2b thus has an insulation space in the interior for a solid insulating material 20.
  • 3b and 3c designate the power connections.
  • the insulator part 2, 2b surrounds the current conductor 3.
  • the field control is again a shielding electrode 6, 6a in the field loading zone 7, 7a on the earth flange 4 and is with this electrically connected via a contact 46.
  • Figs. 2a-2d and Fig. 3a-3b show embodiments for a gas-insulated or solid-insulated or otherwise isolated dielectric bushing 1 ', in accordance with the invention at least one shielding electrode 6; 6a, 6b without sacrificing dielectric strength or reliability was omitted.
  • the shielding electrode 6; 6a, 6b is namely for the purpose of field control in the Field loading zone 7; 7a, 7b a non-linear electrical and / or dielectric field control element 9; 9a, 9b; 9i, 9o; 9s on the insulator part 2; 2a, 2b; 2c in the area of the first Mounting flange 4 available.
  • the field control element 9; 9a 9b; 9i, 9o; 9s is used instead of the earlier in the insulator part 2; 2a, 2b; 2c arranged shielding electrode 6; 6a, 6b for the dielectric relief of the field loading zone 7; 7a, 7b.
  • the field control element 9 to the dielectric Relief of the field loading zone 7 designed so that the flange region 7 is stress relieved.
  • the field control element 9 in an intermediate layer 22nd between the GRP pipe (fiberglass-reinforced plastic and especially epoxy tube) 2a and the silicone shield 2b arranged in the form of a cylinder jacket-shaped coating 9.
  • the field control element 9 by any known manufacturing or processing process, z. B. casting, spraying, winding, extrusion o. ⁇ ., be applied to the outside of the GRP pipe 2a.
  • the field control element 9; 9a, 9b; 9i, 9o; 9s on: nonlinear electrical varistor characteristics and in particular a critical field strength, the varistor switching behavior the field control element 9; 9a, 9b; 9i, 9o; 9s characterized; and / or a high dielectric constant ⁇ , in particular ⁇ > 30, preferably ⁇ > 40 and especially preferably ⁇ > 50.
  • the field control element 9 is in electrical Contact with the first mounting flange 4 and extends over a predeterminable length l along a longitudinal extent x of the insulator part 2; 2a, 2b. It has one predefinable thickness d or thickness distribution d (l) as a function of length l. Preferably, its length l is greater than or equal to a ratio of a maximum to be tested Surge voltage, in particular a lightning impulse, too the critical electric field strength. This design consideration applies with advantage for all embodiments, where the shielding electrode 6a in the Erdflansch Scheme 7a through the Field control element 9; 9a; 9i, 9o is replaced.
  • the field control material 9, 9i is arranged on an inner side 21 of the GFRP pipe 2a and can additionally help to reduce surface charges there as well.
  • the length l 1 is chosen here by way of example so that the field control layer 9, 9i is not in electrical contact with the counter flange 8.
  • FIG. 2 c in addition to the field control element 9; 9a another field control element 9; 9b, which likewise has suitable nonlinear electrical and / or dielectric properties, in particular those as previously described for the field control element 9; 9a, and in addition in a field loading zone 7, 7b in the region of the second mounting flange 8 over a predetermined length l; l 2 and thickness d or d (l 2 ) on the insulator part 2; 2a, 2b is present.
  • the further field control element 9 is used; 9b as a replacement for a shielding electrode 6b in the region of the second, here the upper, mounting flange 8.
  • the field control element 9; 9a including the further field control element 9; 9b is selected in the intermediate layer 22.
  • the further field control element 9; 9b in electrical contact with the second mounting flange 8 and / or is the further field control element 9; 9b by a field control material-free zone extending along the longitudinal extent of the insulator part 2; 2a, 2b extends from the field control element 9; 9a separated in the region of the first mounting flange 4.
  • a first field control element 9; 9o in the intermediate layer 22 between the GRP pipe 2a and shield 2b and a second field control element 9, 9i on the inner side 21 of the GRP pipe 2a in the Erdflansch Scheme 7a be present.
  • the first integrated and the second internal field control element 9o, 9i can be made of the same or other field control material and in particular varistor material.
  • the associated thicknesses d o , d i and lengths l o , l i can be designed individually. By way of example, d i > d o and l i ⁇ l o are selected.
  • Fig. 3a and Fig. 3b show an insulator part 2, 2c of a Porcelain hollow insulator 2c, on the inside 21 equipped with the field control layer 9, 9i. optional can additionally on the outside 23 a field control material coating 9o, z. B. in disjoint horizontal Strip 9o, preferably between insulator screens 2c and in particular in the lower Erdflansch Scheme 7a, available be.
  • the field control material 9; 9a, 9b; 9i, 9o in a coating or even massive Shape to be present on an inner 21 and / or integrated in an intermediate layer 22 between Components 2a, 2b of the insulator part 2; 2a, 2b and / or on an outer side 23 of the insulator part 2; 2a, 2b; 2c is arranged.
  • the field control material 9 takes over; 9s one mechanically supporting function.
  • Such a field control material insulator tube 2; 2b including 9s is especially easy to set up and special thin in diameter.
  • a preferred choice of material for the field control materials 9; 9a, 9b; 9i, 9o; 9s comprises a matrix filled with microvaristor particles and / or high dielectric constant particles.
  • Suitable microvaristor particles are, for example, doped ZnO particles, TiO 2 particles or SnO 2 particles. High dielectric constant have z.
  • ZnO Mikrovaristorpumblen these are typically sintered in a temperature range of 800 ° C to 1200 ° C. After rupture and optionally sieving of the sintered product, the microvaristor particles have a typical particle size of less than 125 .mu.m.
  • the matrix is chosen application-specific and can, for. Example, an epoxy, silicone, EPDM, thermoplastic, thermoplastic elastomer or glass.
  • the filling of the matrix with microvaristor particles may be, for example, between 20% by volume and 60% by volume.
  • FIG. 5 shows calculations of the E field distribution E (x) normalized to a maximum E field E 0 as a function of the longitudinal coordinate x of the insulator part 2 and the time represented by successive snapshots a, b, c for a conventional implementation 1 with shielding electrode 6 according to FIG. 1 and D, E, F, G for an inventive implementation 1 '.
  • the calculations were made for a SF 6 170 kV bushing with GRP pipe 2a and silicone shield 2b according to conventional structure 1 or inventive construction 1 '.
  • Fig. 6 shows an insufficient design, wherein the field control element 9; 9a, 9b; 9i, 9o; 9s has too high electrical conductivity or the length l; l 1 , l 2 is too short.
  • the E-field propagates along the field control layer 9; 9a, 9b; 9i, 9o; 9s, but is not degraded, so that at the end of the field control layer 9; 9a, 9b; 9i, 9o; 9s nevertheless again a field exaggeration occurs, which can lead to partial discharges, flashovers or breakdowns.
  • too low electrical conductivity of the field control material 9; 9a, 9b; 9i, 9o; 9s the E-field can not be effectively controlled or controlled.
  • the simple but effective rule can be stated that the field control element length l; l 1 , l 2 is greater than or equal to choose a ratio of a surge voltage to the critical electric field strength, the varistor switching behavior of the field control element 9; 9a, 9b; 9i, 9o; 9s characterized.
  • inventive dielectric implementation 1 uses as implementation 1 ' in a high voltage electrical apparatus, in particular a disconnector, outdoor circuit-breaker, vacuum switch, Dead Tank Breaker, Current Transformer, Voltage Transformer, Transformer, Power capacitor or cable termination or in an electrical switchgear for high or low Medium voltage.
  • the invention is also a high-voltage electrical apparatus, in particular a disconnector, Outdoor Circuit Breaker, Dead Tank Breaker, Current Transformer, Voltage transformer, transformer, power capacitor or cable termination, wherein a dielectric Implementation 1 'as described above is present.
  • an electrical switchgear in particular a High or medium voltage switchgear comprising a claimed such high voltage electrical apparatus.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)
  • Thermistors And Varistors (AREA)
EP04405151A 2004-03-15 2004-03-15 Traversée haute tension avec élément pour les contrôle du champ électrique Expired - Lifetime EP1577904B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP04405151A EP1577904B1 (fr) 2004-03-15 2004-03-15 Traversée haute tension avec élément pour les contrôle du champ électrique
AT04405151T ATE546818T1 (de) 2004-03-15 2004-03-15 Hochspannungsdurchführung mit feldsteuermaterial
US11/079,858 US7262367B2 (en) 2004-03-15 2005-03-15 High voltage bushing with field control material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04405151A EP1577904B1 (fr) 2004-03-15 2004-03-15 Traversée haute tension avec élément pour les contrôle du champ électrique

Publications (2)

Publication Number Publication Date
EP1577904A1 true EP1577904A1 (fr) 2005-09-21
EP1577904B1 EP1577904B1 (fr) 2012-02-22

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US (1) US7262367B2 (fr)
EP (1) EP1577904B1 (fr)
AT (1) ATE546818T1 (fr)

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WO2009003816A1 (fr) * 2007-07-05 2009-01-08 Abb Technology Ltd Raccord de câble à haute tension
WO2009010493A1 (fr) * 2007-07-17 2009-01-22 Siemens Aktiengesellschaft Dispositif transformateur d'un appareillage sous enveloppe métallique à isolation gazeuse et appareillage sous enveloppe métallique à isolation gazeuse
WO2009100904A1 (fr) * 2008-02-14 2009-08-20 Lapp Insulator Gmbh & Co. Kg Isolateur composite à commande de champ
EP2057644A4 (fr) * 2006-08-31 2012-03-14 Abb Technology Ltd Douille haute tension
WO2012065889A1 (fr) * 2010-11-16 2012-05-24 Siemens Aktiengesellschaft Ensemble isolateur présentant des microvaristances, et procédé de production d'un ensemble isolateur présentant des microvaristances
EP3591672A1 (fr) * 2018-07-02 2020-01-08 ABB Schweiz AG Isolant a gradient de résistivité

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EP2154700A1 (fr) * 2008-08-14 2010-02-17 ABB Technology AG Isolant haute tension doté d'un élément de commande de champ
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CN105207130B (zh) 2009-09-14 2018-11-23 阿雷沃国际公司 地下模块化高压直流电力传输系统
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CA2799601C (fr) 2010-05-21 2016-07-05 Abb Research Ltd Appareil de terminaison de cable pour courant continu a haute tension
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DE102013204706A1 (de) * 2013-03-18 2014-09-18 Siemens Aktiengesellschaft Widerstandsbelag für ein Gleichstromisoliersystem
DE102014004284B4 (de) * 2014-03-26 2019-11-14 Lapp Insulators Gmbh Hochspannungsdurchführung
CN103971861A (zh) * 2014-05-21 2014-08-06 北京铁道工程机电技术研究所有限公司 一种具有防界面击穿的动车车顶复合绝缘子
KR101983487B1 (ko) * 2015-03-30 2019-05-28 미츠비시 히타치 쓰루 가부시키가이샤 드릴
EP3096334B1 (fr) * 2015-05-22 2020-12-30 ABB Power Grids Switzerland AG Traversée électrique
CN106199117B (zh) * 2016-07-15 2018-11-23 中国南方电网有限责任公司超高压输电公司检修试验中心 一种直流分压器辅助伞裙设计方法
DE102017212977A1 (de) * 2017-07-27 2019-01-31 Siemens Aktiengesellschaft Steckbare Hochspannungsdurchführung und elektrisches Gerät mit der steckbaren Hochspannungsdurchführung
CN107800109A (zh) * 2017-10-31 2018-03-13 清华大学 采用非线性电导材料预制橡胶压控管的电缆端头
EP3667684B1 (fr) * 2018-12-12 2024-08-21 Hitachi Energy Ltd Traversée électrique
CN113450948A (zh) * 2021-07-19 2021-09-28 上海甲希科技有限公司 一种绝缘管型母线及绝缘管型母线的绝缘制造方法和设备
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"Technical Guide", 30 March 1996, article "SFs-air bushings, type GGA"
L. B. WAGENAAR: "Electrical Bushings", pages: 3 - 171,3-18
L. L. GRIGSBY: "The Electric Power Engineering Handbook", 2001, CRC PRESS UND IEEE PRESS

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2057644A4 (fr) * 2006-08-31 2012-03-14 Abb Technology Ltd Douille haute tension
US8389876B2 (en) 2006-08-31 2013-03-05 Abb Technology Ltd. High voltage bushing
WO2009003816A1 (fr) * 2007-07-05 2009-01-08 Abb Technology Ltd Raccord de câble à haute tension
WO2009010493A1 (fr) * 2007-07-17 2009-01-22 Siemens Aktiengesellschaft Dispositif transformateur d'un appareillage sous enveloppe métallique à isolation gazeuse et appareillage sous enveloppe métallique à isolation gazeuse
WO2009100904A1 (fr) * 2008-02-14 2009-08-20 Lapp Insulator Gmbh & Co. Kg Isolateur composite à commande de champ
DE202009018686U1 (de) 2008-02-14 2012-11-06 Lapp Insulators Gmbh Feldgesteuerter Verbundisolator
US8637769B2 (en) 2008-02-14 2014-01-28 Lapp Insulators Gmbh Field-controlled composite insulator and method for producing the composite insulator
WO2012065889A1 (fr) * 2010-11-16 2012-05-24 Siemens Aktiengesellschaft Ensemble isolateur présentant des microvaristances, et procédé de production d'un ensemble isolateur présentant des microvaristances
EP3591672A1 (fr) * 2018-07-02 2020-01-08 ABB Schweiz AG Isolant a gradient de résistivité
WO2020007871A1 (fr) * 2018-07-02 2020-01-09 Abb Schweiz Ag Isolateur à gradient de résistivité
US11798711B2 (en) 2018-07-02 2023-10-24 Hitachi Energy Switzerland Ag Insulator with resistivity gradient

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EP1577904B1 (fr) 2012-02-22
US20050199418A1 (en) 2005-09-15
ATE546818T1 (de) 2012-03-15
US7262367B2 (en) 2007-08-28

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