EP3579253A1 - Système de chaîne pour une ligne aérienne haute ou très haute tension - Google Patents

Système de chaîne pour une ligne aérienne haute ou très haute tension Download PDF

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Publication number
EP3579253A1
EP3579253A1 EP18175766.7A EP18175766A EP3579253A1 EP 3579253 A1 EP3579253 A1 EP 3579253A1 EP 18175766 A EP18175766 A EP 18175766A EP 3579253 A1 EP3579253 A1 EP 3579253A1
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EP
European Patent Office
Prior art keywords
fitting
end fitting
protective
chain arrangement
insulating core
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
EP18175766.7A
Other languages
German (de)
English (en)
Other versions
EP3579253B1 (fr
EP3579253C0 (fr
Inventor
Thomas Lustenberger
Erwin Kurzo
Thomas Carlin
Jonas Trüssel
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.)
BKW Energie AG
Pfisterer Switzerland AG
Original Assignee
BKW Energie AG
Pfisterer Switzerland 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 BKW Energie AG, Pfisterer Switzerland AG filed Critical BKW Energie AG
Priority to EP18175766.7A priority Critical patent/EP3579253B1/fr
Publication of EP3579253A1 publication Critical patent/EP3579253A1/fr
Application granted granted Critical
Publication of EP3579253B1 publication Critical patent/EP3579253B1/fr
Publication of EP3579253C0 publication Critical patent/EP3579253C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
    • H01B17/46—Means for providing an external arc-discharge path
    • 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
    • H01B17/02—Suspension insulators; Strain insulators
    • H01B17/06—Fastening of insulator to support, to conductor, or to adjoining insulator
    • 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 invention relates to a chain arrangement for a high or extra high voltage overhead line, comprising a long-rod insulator with an insulating core made of fiber-reinforced plastic and at least one end fitting and an arrangement for surge dissipation with at least one protective fitting.
  • the at least one protective fitting is attached to the at least one end fitting of the long-rod insulator.
  • long-rod insulators are used in particular to carry the conductors of overhead lines. On the one hand, they create a mechanical connection between the respective transmission tower and the respective conductor cable. On the other hand, they insulate the conductor cord electrically from the overhead power pole.
  • Long rod insulators comprise a generally circular cylindrical insulating core, which is mechanically firmly connected to end fittings at both ends. In general, the insulating core is surrounded by a sheath, which has a shielded outer shape, so that there is a long creepage along the Isolatorenaussenseite.
  • the umbrellas are also usually designed so that the underside of the umbrellas remains as dry as possible when it rains.
  • the long-rod insulators have a certain predetermined length, which consists of the desired electrical properties, eg. B. in terms of the possibility of rollovers results. Relevant here is the distance between the lower edge of the earthed mast-side part above and the live rope-side part below.
  • Long rod insulators are each part of a chain arrangement. This includes, in addition to the insulator, in particular mast-side fastening elements, a carrier device for the conductor cable and optionally a connecting element for a weight unit.
  • the elements of the chain assembly are interconnected by suitable connectors, such as those meeting international standards such as IEC 60471 / 19L.
  • Chains for high-voltage power lines typically with voltages in the range of 50-150 kV
  • extra-high voltage lines typically with voltages in the range 220-400 kV
  • protective fittings form, for example, a defined spark gap for the derivation of overvoltages, as they occur in particular in lightning strikes. This largely avoids that the discharge takes place via the insulator.
  • an arc between the mast and line should be kept away from the insulating core and its possible sheath by a corresponding geometry and materialization of the protective fitting and made to extinguish.
  • Protective fittings often comprise two similar or identically formed parts which are mounted above the actual insulator (i.e., mast side) and below the actual insulator (i.e., rope side).
  • Typical is a fastening by means of separate elements which are fastened above and below the long-rod insulator. These separate elements have a certain axial extent and thus contribute to the overall length of the chain assembly.
  • long rod insulators were made from ceramic materials. For some time win long-rod insulators with a core of fiber reinforced plastic, z. As glass fiber reinforced plastic (GRP), in importance. In contrast to a ceramic core, the insulating core of such insulators is not cemented into the corresponding end fitting, but is typically clamped or pressed. As a result of the greater axial extent of the press or clamping connection, this generally results in the total length of a long-rod insulator having a core of fiber-reinforced plastic being greater than the total length of a ceramic long-rod insulator with corresponding electrical properties.
  • GRP glass fiber reinforced plastic
  • a disadvantage is a greater length also because it goes hand in hand with a larger pivoting range, so with a reduction of the minimum distance of the conductor cable to the master shaft.
  • EP 0 038 475 A2 Kertial Pfisterer Electrotechnical Spezial
  • an end fitting for an insulator with a core of glass fiber reinforced plastic (GRP) This comprises a clamping device with a first clamp and a cone clamp, wherein the clamping sleeve of the cone clamp and the first clamp are supported on each other.
  • the housing of the end fitting, the guy body serves as a support for a shield ring, which is formed by a thickened edge of a funnel.
  • the shield ring integrally connects in the direction of the opposite end fitting to the housing.
  • the DE 30 14 600 A1 (Karl Pfisterer Electrotechnical Spezialumble GmbH & Co. KG) relates to a connection fitting for an insulator rod made of glass fiber reinforced plastic with a matched to the outer diameter of the rod clamping device.
  • the fitting should allow for a certain length a much higher holding force than previously known fittings.
  • an additional clamping device is used, which is tuned to a smaller rod outside diameter than the usual clamping device.
  • the clamping elements are preferably constructed of at least two clamping cones, which via a weakening zone, for. B. an annular groove are interconnected.
  • the insulator rod is reduced in the end portion to the inner diameter of the corresponding clamping cone.
  • a guard ring is formed by the reinforced edge of a bell, wherein the bell is clamped on the cup-like part of the end fitting via a hollow cylindrical, longitudinally slotted hub portion.
  • the object of the invention is therefore to provide a the aforementioned technical field associated with chain arrangement, which has a reduced susceptibility to interference at surges, while meeting the electrical requirements and has a minimum length.
  • the fastening of the at least one protective fitting takes place in an end-side axial region of the at least one end fitting, outside a connection region between insulating core and end fitting.
  • a first axial region discharge region
  • a second axial region core region
  • the fiber-reinforced plastic is in particular glass fiber reinforced plastic (GRP). But there are also insulating cores made of other fiber-reinforced plastics such. As carbon fiber reinforced plastic (CFRP) can be used.
  • GRP glass fiber reinforced plastic
  • CFRP carbon fiber reinforced plastic
  • the long-rod insulator comprises in particular two end fittings, one being arranged at each end of the insulating core.
  • the chain assembly also includes two protective fittings, one attached to each end fitting.
  • the protective fitting is formed in particular of galvanized steel, but it is also possible embodiments of other metallic materials or other material with sufficient conductivity and mechanical stability.
  • the protective fitting can also be composed of parts of different materials.
  • the chain assembly may further include a sheath surrounding the insulating core as described above.
  • the attachment of the protective fitting or the protective fittings directly to the end fitting or the end fittings allows a shortened version of the chain arrangement compared with a chain arrangement in which above and / or below separate elements are arranged on the long bar insulator.
  • the protective fitting comprises a fastening element, which is attachable to the end fitting.
  • a fastening element which is attachable to the end fitting.
  • the geometry of the fastener is specifically adapted to the outer geometry of the respective end fittings, and / or it can be adapted to the outer geometry of the end fittings in a certain range. This has the advantage that available long-rod isolators can be easily equipped with the protective fittings.
  • the attached by means of the fastener protective fittings can be replaced in a simple manner, for. B. after an arc event.
  • the fastener may be integrally formed with the actual protective fitting, but it may also be present as a separate element, which is connected to the actual protective fitting in a suitable manner, for. B. welded and / or screwed.
  • the fastener may be formed one or more parts.
  • the fastener comprises a receptacle in which a portion of the end fitting is suitably receivable.
  • the receptacle is preferably designed such that the recorded area lies completely outside the connection region between insulating core and end fitting. The correct positioning is advantageously ensured by an appropriate choice of geometry and / or markings on the fastener and / or the end fitting.
  • the receptacle may include an end tapering portion which cooperates with a taper of the end fitting. Also possible is a stop which cooperates with the frontal free end of the end fitting.
  • the receptacle is formed by two half-shells.
  • Such a geometry allows a simple and secure attachment to the end fitting.
  • the half-shells allow a large-area attachment at the same time Adaptability to slightly different geometries, eg. B. due to thermal effects or manufacturing tolerances. For this purpose, in particular the mutual distance of the two half-shells is slightly changed. Also, such a design guarantees the coaxial alignment between protective fitting and insulating core, regardless of the position of the insulating core, especially in deflection thereof.
  • a symmetrical arrangement of two half-shells which largely surrounds the end fitting ensures that currents which arise during the dissipation of overvoltages and short circuits are largely derived axially downward from the half shells over outer regions of the housing of the end fitting become. Radial flows through the interior of the end fitting, which could lead to damage to the insulating core are minimized.
  • the at least one end fitting has a first through opening
  • the fastening element comprises a second through opening, so that a bolt-like element can be guided through the first and the second through opening for connecting the fastening element to the end fitting.
  • the bolt-like element are in particular bolts, screws, threaded rods, etc. in question.
  • the bolt-like element has a head, which is supported on a first side on the fastening element and / or the end fitting, and a counterpart, which is supported on a second side on the fastening element and / or the end fitting.
  • the bolt is also used in particular for connecting the end fitting to the following element (eg a holding device for the conductor cable).
  • the bolt is in addition to its mechanical function, the task to create a reliable electrical connection between the protective fitting and the subsequent element. High currents can thus be derived largely independently of the end fitting.
  • the combination of a fastener with two half-shells and the connection with the bolt-like element is outside of a first of the half-shells.
  • the element passes through this first half shell, then the end fitting and finally the second half shell in the corresponding through holes.
  • the bolt-like element On the outside of the second half-shell, the bolt-like element then has a counterpart, which secures the element together with the head against slipping out.
  • the protective fitting can also be attached in other ways, for. B. by being welded to the end fitting or by being integrally formed with the end fitting.
  • the protective fitting is in particular a protective ring.
  • Such protective rings ensure that no corona discharges occur in the interior of the ring, which could damage the long-rod insulator. Analogous to a Faraday cage, they shield the interior defined by the guard ring or guard rings. Peak discharges on elements of the long-rod insulator are thus avoided.
  • the guard ring does not necessarily have to be a closed ring.
  • the ring may be interrupted and have two free ends, in particular for the defined discharge of overvoltages between two correspondingly formed protection rings.
  • an attachment of the guard ring by means of a fastener with two half-shells of the guard ring preferably comprises a ring member which is connected to each of the half-shells via one arm. This results in a mechanically stable attachment and a defined and uniform dissipation of surges from the ring member via the arms and the fastener into the end fitting and the subsequent element.
  • the invention can also be implemented with other protective fittings, z. B. with protective horns or protective bells.
  • the protective fittings can be mounted one or more times on both ends or only on one side - depending on the protective function and needs.
  • a press connection between insulating core and end fitting is formed in the connection area.
  • Such compounds have been found to be well suited for insulating cores made of fiber-reinforced plastic.
  • the invention can also be implemented with long rod insulators, in which the insulating core is connected in a different way with the end fitting, z. B. via an adhesive connection or a screw.
  • the chain assembly comprises two equally formed protective fittings, which are attached to each one of two end fittings.
  • the use of the same protection fittings resulting in reduced storage costs, because not different components must be kept for both sides.
  • FIGS. 1A, 1B show two side views of an installed inventive chain assembly 100.
  • the arrangement shown is designed for an operating voltage of 145 kV.
  • the chain assembly 100 comprises a long-rod insulator 110 with glass fiber insulating core.
  • the insulator will be down, related to the FIG. 3 described in more detail.
  • the chain assembly 100 further includes two guard rings 150, which are mirror-inverted to one another at the top and bottom of the long bar insulator 110. They will be further below, in the context of the FIG. 2 described in more detail.
  • the chain assembly 100 is suspended from an overhead pole (not shown) via a steel hanger 10, which is known per se.
  • a double lug 20 made of steel is attached at the lower end of the chain assembly 100, namely at the lower end fitting 130 of the long bar insulator 110.
  • a suspension clamp 30 is taken from aluminum and steel, which carries the conductor 1 of the overhead line.
  • a protective spiral 35 made of aluminum is arranged in a conventional manner.
  • a fork lug 40 made of steel is attached, which carries a weight unit 50.
  • the minimum breaking load of the entire chain arrangement is 120 kN.
  • the fork connection dimensions comply with the standard IEC 60471 / 19L.
  • the steel parts are each hot-dip galvanized.
  • FIGS. 2A, 2B show two side views of the guard ring of the chain assembly
  • the Figure 2C shows a plan view of the guard ring.
  • the guard ring 150 is made of steel. It comprises the actual ring 152, the fastening element 160 and two arms 154, 156 connecting the ring 152 and the fastening element 160, which are welded at their ends respectively to the ring 152 and to the fastening element 160.
  • the ring 152 is not closed in itself, but it runs in two end horns 152a, 152b, which are bent at an angle of 10 ° to the main ring part and which carry at their end in each case a spherical end part.
  • the two guard rings 150 of the chain assembly 100 are arranged such that the spherical end portions facing away from each other. A defined way of dissipating overvoltages is achieved, which extends from the termination parts of the end horns 152a, 152b on one side of the long bar insulator 110 to the end parts of the end horns 152a, 152b on the other side of the long bar insulator 110.
  • the two protective rings 150 shield the main part of the long-rod insulator 110 electrically. The result is a flash withstand voltage of 660 kV.
  • the fastening element 160 comprises two half-shells 162, 164. They each have a U-shaped cross-section and are arranged in mirror image facing each other, so that they define a receiving space between them.
  • a bolt 170 made of steel passes through mutually aligned through holes of the two half-shells 162, 164.
  • the arms 154, 156 extend from the ring 152 initially perpendicular to the plane defined by the ring body. They follow a straight section of a 90 ° bend and are welded at their opposite end of the ring 152 with one of the half shells 162, 164.
  • FIG. 3 shows a vertical cross section through an end portion of the insulator and the fastening element of the guard ring, along the line AA in the Figure 2C ,
  • the long-rod insulator 110 comprises an insulating core 120 made of high-strength glass fiber reinforced plastic, which is surrounded at its end by the end fitting 130.
  • the insulating core 120 is in its central region, which extends over approximately 90% of the length of the insulator extends, surrounded by a shielded sheath 132 of a silicone material.
  • the screens lead to a creepage distance of 3'870 mm.
  • the rod which forms the ring 152 of the guard ring, is in the illustrated cross section of the side of the end fitting 130, approximately at the level of the outer end of the sheath 132nd
  • the fastening element 160 with the two half shells 162, 164 encloses a fork-like end section of the end fitting 130. It does not extend into the connection area between end fitting and insulating core (see the dashed line). Both the fastening element 160 and a connecting part of the double lug 20 are fastened to the end fitting 130 by means of a bolt 170.
  • the bolt 170 has a bolt head 172 and on the opposite side an attachable locking ring 174 so that it is secured against slipping out of the end fitting 130.
  • the bolt 170 not only serves to mechanically fasten the fastener 160 to the end fitting 130, but also ensures proper axial positioning and rotational position of the shield 150 relative to the long rod insulator 110. It also directs a substantial portion of the leakage from the fastener 160 to the connector of the double strap 20.
  • the fastener 160 is pushed with the two half shells 162, 164 from the outside axially on the end portion of the end fitting 130. Subsequently, the connecting part of the double lug 20 is inserted into the fork-like end portion of the end fitting 130. Finally, the bolt 170 is inserted and secured.
  • intermediate pieces for attachment of protective fittings between the long-rod insulator and the respective fastening part can be saved.
  • a reduced length of 120 mm results for each intermediate piece saved, ie 240 mm for protective fittings arranged on both sides.
  • Typical chain arrangements with long bar insulators with a core made of fiberglass are about 220 mm longer than corresponding arrangements with ceramic insulators. This additional length can thus be compensated for a two-sided attachment according to the inventive solution. It even results in a certain reduction of the total length.
  • the invention is not limited to the illustrated embodiment.
  • other types of protective fittings can also be attached to the end fitting in the manner according to the invention. If necessary, only a protective fitting is available.
  • the geometry of the fastening part may differ from that of the exemplary embodiment.
  • the half-shells can be shaped differently, or instead of half-shells, a one-piece receptacle is used, which optionally comprises resilient sections.
  • the fixation of the fastening part to the end fitting can be done instead of the bolt or in addition to the bolt by another element, for. B. a clamping mechanism.
  • the positioning can be ensured in this case by other means, in particular slings.
  • the illustrated long-rod insulator is to be understood only as an example. With different geometry of the end fitting and / or another extension of the Isolierkerns in the end fitting also results in a different geometry of the fastening part.
  • the invention provides a chain arrangement which has a reduced susceptibility to interference in the event of overvoltages, thereby fulfilling the electrical requirements and having a minimum length.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)
EP18175766.7A 2018-06-04 2018-06-04 Système de chaîne pour une ligne aérienne haute ou très haute tension Active EP3579253B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18175766.7A EP3579253B1 (fr) 2018-06-04 2018-06-04 Système de chaîne pour une ligne aérienne haute ou très haute tension

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18175766.7A EP3579253B1 (fr) 2018-06-04 2018-06-04 Système de chaîne pour une ligne aérienne haute ou très haute tension

Publications (3)

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EP3579253A1 true EP3579253A1 (fr) 2019-12-11
EP3579253B1 EP3579253B1 (fr) 2023-06-14
EP3579253C0 EP3579253C0 (fr) 2023-06-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110133458A (zh) * 2019-05-24 2019-08-16 沈阳工业大学 一种应用于高压试验中的半自动放电的试验装置及方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2164615A1 (de) * 1971-12-24 1973-06-28 Bbc Brown Boveri & Cie Lichtbogen-schutzarmatur fuer isolatorenhaengeketten
DE3014600A1 (de) 1980-04-16 1981-10-22 Karl Pfisterer Elektrotechnische Spezialartikel Gmbh & Co Kg, 7000 Stuttgart Anschlussarmatur fuer einen isolatorstab aus glasfaserverstaerktem kunststoff
EP0038475A2 (fr) 1980-04-16 1981-10-28 Karl Pfisterer Elektrotechnische Spezialartikel GmbH & Co. KG Armature pour la fabrication d'une jonction avec une tige en matière synthétique renforcée par des fibres de verre, qui peut être chargée par une force de traction élevée
JPH09171732A (ja) * 1995-12-20 1997-06-30 Tohoku Electric Power Co Inc 導体耐張碍子装置の鳥害防止用ア−クホ−ン
CN101763922A (zh) * 2009-12-09 2010-06-30 中国电力科学研究院 输电线路复合绝缘子的防雷保护方法和装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2007141A (en) 1930-07-12 1935-07-02 Locke Insulator Corp Grading ring
GB834085A (en) * 1957-09-20 1960-05-04 British Insulated Callenders Improvements in or relating to strain insulators
US3898372A (en) 1974-02-11 1975-08-05 Ohio Brass Co Insulator with resin-bonded fiber rod and elastomeric weathersheds, and method of making same
RO122653B1 (ro) 2006-02-08 2009-10-30 Eximprod Grup S.A. Izolator compozit de susţinere

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2164615A1 (de) * 1971-12-24 1973-06-28 Bbc Brown Boveri & Cie Lichtbogen-schutzarmatur fuer isolatorenhaengeketten
DE3014600A1 (de) 1980-04-16 1981-10-22 Karl Pfisterer Elektrotechnische Spezialartikel Gmbh & Co Kg, 7000 Stuttgart Anschlussarmatur fuer einen isolatorstab aus glasfaserverstaerktem kunststoff
EP0038475A2 (fr) 1980-04-16 1981-10-28 Karl Pfisterer Elektrotechnische Spezialartikel GmbH & Co. KG Armature pour la fabrication d'une jonction avec une tige en matière synthétique renforcée par des fibres de verre, qui peut être chargée par une force de traction élevée
JPH09171732A (ja) * 1995-12-20 1997-06-30 Tohoku Electric Power Co Inc 導体耐張碍子装置の鳥害防止用ア−クホ−ン
CN101763922A (zh) * 2009-12-09 2010-06-30 中国电力科学研究院 输电线路复合绝缘子的防雷保护方法和装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110133458A (zh) * 2019-05-24 2019-08-16 沈阳工业大学 一种应用于高压试验中的半自动放电的试验装置及方法
CN110133458B (zh) * 2019-05-24 2024-02-06 沈阳工业大学 一种应用于高压试验中的半自动放电的试验装置及方法

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EP3579253B1 (fr) 2023-06-14
EP3579253C0 (fr) 2023-06-14

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