EP3109867B1 - Isolateur haute tension - Google Patents

Isolateur haute tension Download PDF

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Publication number
EP3109867B1
EP3109867B1 EP16171528.9A EP16171528A EP3109867B1 EP 3109867 B1 EP3109867 B1 EP 3109867B1 EP 16171528 A EP16171528 A EP 16171528A EP 3109867 B1 EP3109867 B1 EP 3109867B1
Authority
EP
European Patent Office
Prior art keywords
voltage
voltage insulator
damping
insulator
tube
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.)
Active
Application number
EP16171528.9A
Other languages
German (de)
English (en)
Other versions
EP3109867A1 (fr
Inventor
Paul Juntermanns
Achim Langens
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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Filing date
Publication date
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Publication of EP3109867A1 publication Critical patent/EP3109867A1/fr
Application granted granted Critical
Publication of EP3109867B1 publication Critical patent/EP3109867B1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/189—Radial force absorbing layers providing a cushioning effect
    • 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
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/12—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances ceramics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0208—Cables with several layers of insulating material
    • H01B7/0225—Three or more layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements

Definitions

  • the invention relates to a high-voltage insulator with a surrounding a high-voltage conductor insulator.
  • High voltage insulators of this type are known from the prior art. They generally have the task of isolating a high-voltage potential high-voltage line, which usually comprises the current-carrying high-voltage conductor, from a wall essentially at ground potential, through which the high-voltage line is to be carried out.
  • a high voltage line which leads out of a transformer housing, wherein the transformer housing with an insulating liquid, such as oil, is filled.
  • high-voltage insulators can also be used, for example, as high-voltage bushings in systems of high-voltage direct-current transmission technology (HVDC).
  • High-voltage insulators must have excellent insulation, because they usually have to isolate voltages of several hundred kilovolts.
  • the insulating body usually surrounds an axial portion of the high voltage conductor and thus prevents electrical flashovers between the high voltage conductor and the wall.
  • electrical equipment and in particular high voltage insulators used therein, may be subject to mechanical force.
  • the mechanical force may be external environmental influences as well as, for example, collisions in vehicle-sharing accidents or firearms. Such force effects can damage the high-voltage insulator or the insulating body be so that its electrical insulation is impaired. As a result, it can sometimes come to a failure of the entire electrical system in which the high-voltage insulator is used.
  • transformer systems comprising oil-insulated transformers.
  • the insulating ability of the high-voltage insulator which forms a transformer bushing in this context, can be affected in such a way that can cause by electrical flashovers an ignition of the insulating oil to a fire of the entire transformer system.
  • the object of the invention is to propose a high-voltage insulator which is as insensitive to mechanical force.
  • the object is achieved in a high-voltage insulator according to the art in that the high-voltage insulator has an insulating body at least partially embracing damping chamber which is filled with an electrically insulating damping means for damping external mechanical force on the insulator.
  • the high voltage insulator according to the invention provides additional protection against mechanical force. If, for example, a punctual mechanical force is exerted on the high-voltage insulator, then this force can be damped by means of the damping means and distributed over a larger effective area. In this way, a possible deformation of the insulating can be avoided or at least reduced. A reduction in the insulating capability of the high voltage insulator due to its deformation can be minimized accordingly.
  • the projectile may be in the Cushioning chamber are collected before it reaches the insulator.
  • the energy of the projectile in this case at least partially absorbs the damping means.
  • damage to the high-voltage insulator may occur, penetration of the projectile into the insulator can be prevented.
  • the risk of ignition of the insulating oil directly through the projectile or indirectly by an electrical flashover can be reduced.
  • the high-voltage insulator comprises a first, inner tube and a second tube, spaced from the first tube, which are each arranged concentrically to the high-voltage conductor and at least partially delimit the damping chamber.
  • the damping chamber in this case has a substantially cylindrical shape, wherein the limited by the two concentric tubes cylinder surrounds the insulating body.
  • An external punctiform force on the high-voltage insulator may deform the outer of the two tubes and absorb part of the energy of the force. The remaining force can be absorbed at least partially, preferably completely, by the damping means.
  • the initially punctual force is advantageously distributed within the damping chamber, so that it does not affect the inner of the two pipes punctiform, but flat. The risk of severe deformation or even penetration of the inner tube can be minimized in this way.
  • the shielded from the damping chamber insulator remains largely undamaged and retains its insulating largely.
  • the first and second tubes may each extend axially along the entire high-voltage insulator, thereby providing the high-voltage insulator with full protection. Radially outside the high-voltage insulator further insulation elements may be appropriate, such as silicone or ceramic shields. These may for example be attached to the outer of the two tubes.
  • the high-voltage insulator may further comprise fastening elements which are set up for fastening the high-voltage insulator to components of a high-voltage installation, for example a transformer or switchgear housing.
  • the first and / or the second tube made of a plastic fiber composite material, a metal matrix composite material, a ceramic fiber composite material or a hard metal.
  • plastic fiber composite material a metal matrix composite material
  • ceramic fiber composite material a hard metal.
  • materials and their preparation are known per se to those skilled in the art. They are particularly resistant to mechanical force effects.
  • the damping means has an electrical conductivity of less than 0.001 S / m (Siemens per meter), particularly preferably 0.0001 S / m.
  • some plastics, such as soft PVC, but also beds or foams are suitable.
  • the damping means is a damping fluid.
  • the damping agent has particularly favorable damping properties.
  • the damping fluid is relatively tough. Such toughness can be achieved, for example, with silicone oils.
  • the damping fluid at room temperature has a viscosity of more than 10 3 Pa * s, more preferably more than 10 4 Pa * s, on.
  • damping fluid is a flame retardant fluid.
  • a liquid is said to be flame retardant if its focal point is above 300 degrees Celsius.
  • Suitable flame retardant damping fluids are, for example, high molecular weight hydrocarbons, natural or synthetic esters or even the silicone oils already mentioned. The use of flame-retardant damping fluids minimizes the risk of fire in the electrical system in which the high-voltage insulator is used.
  • the damping agent may also be present as a solid.
  • the damping means is a dry foam.
  • the dry foam has the advantage that even in case of damage to the damping chamber can not escape to the outside and the high-voltage insulator is not affected even after a successful external force in general in its function.
  • the dry foam is a polyurethane foam (PUR foam).
  • the dry foam may be foamed with an insulating gas such as SF6. This increases the insulating ability of the damping means and thus the entire high-voltage insulator.
  • the insulating body comprises a winding body of concentrically arranged around the high voltage conductor electrically conductive deposits, which are separated by insulating layers, wherein the damping chamber is arranged radially on the outside of the winding body.
  • the electrical inserts are used for electric field control and are also referred to as tax deposits.
  • the field control improves the insulating properties of the high-voltage insulator by evenly distributing the voltage drops between the high-voltage conductor and the wall.
  • the winding body has a resin impregnation.
  • the insulating body is impregnated with a resin, for example an epoxy resin.
  • the insulating layers of the insulating body may, for example, paper, such as crepe paper, or nonwoven contain, wherein the insulating layers are wound in the manufacturing process of the high voltage bushing on a winding carrier, such as the high voltage conductor.
  • the insulating body with the wound insulating and control inserts is then soaked in a resin or resin mixture, so that after curing of the resin composition, a compact block is formed which contains no trapped cavities. In this way, particularly good insulating properties of the high voltage insulator can be achieved.
  • Another object of the invention is to propose a transformer bushing for the electrically insulating lead out of a high voltage conductor from a transformer housing, which is as insensitive to a mechanical force as possible.
  • the transformer bushing comprises a high-voltage insulator according to the invention.
  • the advantages of the transformer bushing according to the invention result from the advantages previously obtained in connection with the high-voltage insulator according to the invention in a corresponding manner.
  • FIG. 1 a side cross-section through a high-voltage insulator 1.
  • the high-voltage insulator 1 has an insulating body 2 which is arranged around a high-voltage conductor 3 around and surrounds it on an axial longitudinal section.
  • the high voltage insulator 1 on a cylinder symmetry.
  • the axis of symmetry of the cylindrically symmetrical high-voltage insulator 1 is represented by a broken line 9.
  • the insulating body 2 comprises concentrically arranged around the high-voltage conductor 3 control inserts 21 made of aluminum foil, which are separated from each other by insulating layers 22 of resin-impregnated paper.
  • the high-voltage insulator 1 comprises a first tube 4 and a second tube 5 arranged at a distance from the first tube 4.
  • the first tube 4 and the second tube 5 are each arranged concentrically around the high-voltage conductor 3. Axially between the first tube 4 and the second tube 5, a cavity is formed, which forms the damping chamber 6.
  • the damping chamber 6 is filled with a damping agent.
  • the damping means is a rigid foam made of polyurethane foam.
  • the high-voltage insulator 1 further comprises fastening means 8, which are set up for fastening the high-voltage insulator 1 to a wall. Since the fastening means 8 are connected to a ground-connected wall, the fastening means 8 are at a ground potential.
  • the high voltage conductor 3 is opposite to high voltage potential, in the example shown at 420 kV.
  • the projectile penetrates the second tube 5 and thus penetrates into the damping chamber 6.
  • the energy of the projectile is absorbed in the damping chamber 6 by the damping means.
  • a remaining force of the projectile is distributed in the damping chamber or the damping means such that a pressure generated thereby is distributed over an enlarged area of the first tube 4.
  • a strong deformation or even an opening of the first tube 4 can be prevented in this way.
  • the insulating ability of the insulating body 2 thus remains even in the case of an external punctiform force.
  • FIG. 2 shows an embodiment of a transformer bushing 10.
  • the transformer bushing 10 is configured to lead out a high-voltage high-voltage conductor 11 from a transformer housing 12 of a power transformer 13.
  • transformer feedthrough 10 provides an electrical transition from the transformer 13 to an unillustrated outdoor high voltage terminal ready.
  • the transformer bushing 10 extends from its high-voltage side or transformer side - in Fig. 2 bottom - end by a support flange, not shown, for attachment to the transformer housing 12 for outdoor high-voltage connection.
  • the transformer housing 12 is filled with an insulating oil 14.
  • the transformer bushing 10 has an insulating body 15 concentrically around the high voltage conductor 11 is arranged. Outside of the insulating body 15, a cylindrical damping chamber 16 is mounted.
  • the damping chamber 16 extends in a longitudinal direction of the transformer bushing 10 from the wall of the transformer 13 to an in FIG. 2 By means of the damping chamber 16 and the damping means disposed therein, damage to the insulating body of the transformer bushing 10 can be prevented such that the risk of ignition of the insulating oil 14 is minimized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Insulators (AREA)

Claims (11)

  1. Isolateur (1) de haute tension, comprenant un corps (2) isolant entourant un conducteur (3) de haute tension, caractérisé en ce que l'isolateur (1) de haute tension a une chambre (6) d'amortissement, qui entoure, au moins en partie, le corps (2) isolant et qui est emplie d'un agent d'amortissement isolant électriquement pour l'amortissement d'effet de force mécanique extérieur sur le corps (2) isolant.
  2. Isolateur (1) de haute tension suivant la revendication 1, dans lequel l'isolateur (3) de haute tension comprend un premier tube (4) et un deuxième tube (5) à distance du premier tube, qui sont disposés concentriquement au conducteur (3) de haute tension et qui délimitent, au moins en partie, la chambre (6) d'amortissement.
  3. Isolateur (1) de haute tension suivant la revendication 2, dans lequel le premier et/ou le deuxième tubes (4, 5) sont en un matériau composite matière plastique à fibres, un composé métallique à matrice métallique, un composé composite céramique à fibres ou en un métal dur.
  4. Isolateur (1) de haute tension suivant l'une des revendications précédentes, dans lequel l'agent d'amortissement a une conductivité électrique de moins de 0,001 S/m.
  5. Isolateur (1) de haute tension suivant l'une des revendications précédentes, dans lequel l'agent d'amortissement est un liquide d'amortissement.
  6. Isolateur (1) de haute tension suivant l'une des revendications précédentes, dans lequel le liquide d'amortissement est un liquide difficilement inflammable.
  7. Isolateur (1) de haute tension suivant l'une des revendications 1 à 4, dans lequel l'agent d'amortissement est une mousse sèche.
  8. Isolateur (1) de haute tension suivant la revendication 7, dans lequel la mousse sèche est une mousse de PUR.
  9. Isolateur (1) de haute tension suivant l'une des revendications précédentes, dans lequel le corps (2) isolant comprend un corps d'enroulement composé d'inserts (21) conducteurs de l'électricité disposés concentriquement autour du conducteur (3) de haute tension et séparés les uns des autres par des couches (22) isolantes, la chambre (6) d'amortissement étant disposée à l'extérieur radialement sur le corps d'enroulement.
  10. Isolateur (1) de haute tension suivant la revendication 9, dans lequel le corps d'enroulement a une imprégnation de résine.
  11. Traversée (10) de transformateur pour faire sortir, d'un manière isolée électriquement, un conducteur (11) de haute tension d'un bac (12) de transformateur, caractérisée en ce que la traversée (10) de transformateur comprend un isolateur (1) de haute tension suivant l'une des revendications 1 à 10.
EP16171528.9A 2015-06-26 2016-05-26 Isolateur haute tension Active EP3109867B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015211939.4A DE102015211939A1 (de) 2015-06-26 2015-06-26 Hochspannungsisolator

Publications (2)

Publication Number Publication Date
EP3109867A1 EP3109867A1 (fr) 2016-12-28
EP3109867B1 true EP3109867B1 (fr) 2017-08-30

Family

ID=56096495

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16171528.9A Active EP3109867B1 (fr) 2015-06-26 2016-05-26 Isolateur haute tension

Country Status (4)

Country Link
US (1) US9837184B2 (fr)
EP (1) EP3109867B1 (fr)
CA (1) CA2933882C (fr)
DE (1) DE102015211939A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017212977A1 (de) * 2017-07-27 2019-01-31 Siemens Aktiengesellschaft Steckbare Hochspannungsdurchführung und elektrisches Gerät mit der steckbaren Hochspannungsdurchführung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2911402A1 (de) * 1979-03-23 1980-10-02 Felten & Guilleaume Carlswerk Kondensatordurchfuehrung fuer hochspannungsanlagen
DE19644483C1 (de) * 1996-10-25 1997-11-20 Siemens Ag Isolator für hohe Spannung
DE102004019586A1 (de) * 2004-04-16 2005-11-03 Siemens Ag Elektrischer Isolator, insbesondere für Mittel- und Hochspannungen
DE102010005086B4 (de) * 2010-01-15 2018-05-24 Siemens Aktiengesellschaft Hochspannungsdurchführung
EP2730001B1 (fr) * 2011-05-20 2015-11-18 ABB Technology AG Dispositif de terminaison de cable, procede de prefabrication d'une terminaison de cable et procede de finition d'une terminaison de cable

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CA2933882C (fr) 2019-02-26
CA2933882A1 (fr) 2016-12-26
EP3109867A1 (fr) 2016-12-28
US20160379736A1 (en) 2016-12-29
US9837184B2 (en) 2017-12-05
DE102015211939A1 (de) 2016-12-29

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