WO2018109843A1 - Gas-insulated static induction electrical apparatus - Google Patents

Gas-insulated static induction electrical apparatus Download PDF

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Publication number
WO2018109843A1
WO2018109843A1 PCT/JP2016/087097 JP2016087097W WO2018109843A1 WO 2018109843 A1 WO2018109843 A1 WO 2018109843A1 JP 2016087097 W JP2016087097 W JP 2016087097W WO 2018109843 A1 WO2018109843 A1 WO 2018109843A1
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Prior art keywords
insulating layer
gas
static induction
insulating
conductor
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PCT/JP2016/087097
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French (fr)
Japanese (ja)
Inventor
野口　直樹
松下　正樹
義基 中澤
啓 高野
健史 千切
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株式会社 東芝
東芝エネルギーシステムズ株式会社
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Priority to PCT/JP2016/087097 priority Critical patent/WO2018109843A1/en
Publication of WO2018109843A1 publication Critical patent/WO2018109843A1/en

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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
    • H01B17/56—Insulating bodies
    • H01B17/60—Composite insulating bodies
    • 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
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof

Definitions

  • Embodiments of the present invention relate to a gas-insulated static induction device used as a gas-insulated transformer or a gas-insulated reactor.
  • gas-insulated static induction devices such as small and highly safe gas-insulated transformers and gas-insulated reactors.
  • the gas-insulated static induction appliance is provided with a container for storing a winding.
  • the container is filled with, for example, SF 6 gas having a high pressure resistance as an insulating gas.
  • a lead wire is connected to the winding, and the lead wire is drawn from the winding.
  • the surface of the lead wire serves as an insulation weak point due to the generation of an electric field, and is a location where discharge due to dielectric breakdown is likely to occur.
  • the insulating film for example, a PET (Polyethylene terephthalate: PET) film having high insulating performance and relatively inexpensive is mainly used. Since the PET film is a plastic film, it has a high relative dielectric constant.
  • SF 6 gas is a global warming gas
  • the alternative gas include naturally derived gas, and examples thereof include air, nitrogen, oxygen, carbon dioxide, or a gas mainly composed of two or more of these. Since these naturally derived gases have a lower pressure resistance than SF 6 gas, when the insulation performance of the lead wire is ensured by covering the lead wire with the insulation film, the electric field at the outermost peripheral surface of the insulation film is sufficiently lowered. Therefore, it is necessary to wrap the insulating film to be covered around the lead wire several times and to secure a sufficient distance from the surface of the lead wire to the outermost peripheral surface of the insulating film. When the insulating film is wound around the lead wire several times, the insulating layer made of the insulating film becomes thick. As a result, the lead wire becomes large, leading to an increase in the size of the gas-insulated static induction device.
  • a method has been proposed in which a film in which unevenness is provided on one surface of an insulating film by embossing is wound around the surface of a lead wire and covered. According to this method, SF 6 gas enters the voids of the uneven portions, and the thickness band including the voids of the insulating film increases the dielectric breakdown strength of the entire insulating film.
  • a proposal has been proposed in which polyethylene naphthalate is wrapped around a polyphenylene sulfide film (PPS) in addition to a PET film to improve the heat resistance performance of the insulating film.
  • PPS polyphenylene sulfide film
  • a gas-insulated static induction appliance has also been proposed in which a thermoplastic elastomer film having a high elongation rate is coated on the outside of an embossed PET film to improve the adhesion of the PET film.
  • the above prior art aims to improve the dielectric breakdown strength of the entire insulating film by allowing SF 6 gas having a high dielectric breakdown strength to enter the void layer in the insulating film.
  • naturally derived gas since naturally derived gas has a lower pressure resistance than SF 6 gas, it is not expected to increase the dielectric breakdown strength even if the naturally derived gas enters the void layer in the embossed insulating film. That is, the technique of winding the lead wire with the embossed insulating film and covering it is effective only when the container is filled with SF 6 gas having a high dielectric breakdown strength. It was thought that another approach was necessary when filling the jar.
  • the naturally-occurring gas has a lower withstand voltage than the SF 6 gas, so the insulating layer made of the insulating film
  • the thickness is further increased, which leads to an increase in the size of the gas-insulated static induction appliance.
  • the problem to be solved by the present invention is to provide a gas-insulated static induction device that can be miniaturized even when a gas derived from nature is filled in a container.
  • the present inventors have wound an insulating layer having a low relative dielectric constant to lower the electric field value on the outermost peripheral surface of the insulating layer and an insulating layer having a high relative dielectric constant that inhibits electron acceleration.
  • the electric field value of the outermost peripheral surface of the insulating layer is effectively reduced, and the acceleration of electrons that are the starting point of dielectric breakdown occurring in the layer having a low relative dielectric constant is inhibited. It has been found that the insulation performance can be improved even when there is no high breakdown strength layer such as SF 6 gas in the insulation layer covering the conductor.
  • the gas-insulated static induction electrical appliance includes a conductor housed in a container filled with a naturally derived gas, a first insulating layer that covers the conductor, the conductor, and the first conductor.
  • a second insulating layer having a relative dielectric constant lower than that of the insulating layer, wherein the first insulating layer and the second insulating layer are alternately stacked and disposed toward the outside in the radial direction of the conductor. And extending continuously around the entire circumference of the conductor.
  • FIG. 1 is a cross-sectional view showing a schematic configuration of a lead wire 100 drawn from a winding of a gas-insulated static induction device according to the first embodiment.
  • the gas insulated static induction machine has a container 6.
  • An insulating gas 5 is sealed in the container 6.
  • the container 6 is filled with a natural gas 5 as an insulating gas.
  • the naturally derived gas 5 is mainly composed of air, nitrogen, oxygen, carbon dioxide, or two or more thereof, and has a lower pressure resistance than SF 6 gas.
  • a winding (not shown) is provided in the container 6, and a lead wire 100 is drawn out from the winding.
  • the lead wire 100 is installed in the container 6 together with the winding.
  • the lead wire 100 drawn out from the winding includes a lead conductor 1 and an insulating layer 200.
  • the lead conductor 1 is a core made of a conductor.
  • the insulating layer 200 includes a first insulating layer 2 that covers the lead conductor 1, and a second insulating layer 3 that covers the lead conductor 1 and has a relative dielectric constant lower than that of the first insulating layer 2. Yes.
  • the first insulating layer 2 and the second insulating layer 3 are alternately stacked and disposed toward the outside in the radial direction of the lead conductor 1, and continuously extend and surround the entire circumference of the lead conductor 1. ing.
  • the insulating layer 200 is composed of a plurality of layers of a first insulating layer 2 disposed outside the lead conductor 1 and a second insulating layer 3 disposed outside the lead conductor 1.
  • the first insulating layer 2 and the second insulating layer 3 are made of insulating films made of different materials.
  • the insulating films made of different materials are wound around the lead conductor 1.
  • the first insulating layer 2 and the second insulating layer 3 are alternately wound around the lead conductor 1 a plurality of times. That is, the first insulating layer 2 and the second insulating layer 3 are wound so as to surround the periphery of the lead conductor 1, and the first insulating layer 2 and the second insulating layer 3 are wrapped around the lead conductor 1. They are stacked alternately.
  • the first insulating layer 2 and the second insulating layer 3 are alternately stacked, and the lead conductor 1 is covered to form an insulating layer composed of a plurality of layers.
  • the first insulating layer 2 and the second insulating layer 3 are stacked until the electric field on the surface of the outermost layer of the insulating layers is sufficiently smaller than the dielectric breakdown voltage of the insulating gas 5.
  • a first insulating layer 2 is laminated on the innermost shell adjacent to the lead conductor 1, and a second insulating layer 3 is laminated outside the first insulating layer 2.
  • the first insulating layers 2 and the second insulating layers 3 are alternately stacked up to the outermost peripheral surface.
  • the second insulating layer 3 is laminated on the innermost shell adjacent to the lead conductor 1, and the first insulating layer 2 is laminated on the outer side of the second insulating layer 3.
  • the second insulating layer 3 and the first insulating layer 2 may be alternately stacked up to the surface.
  • the first insulating layer 2 is stacked, the first insulating layer 2 is stacked outside the first insulating layer 2, and the first insulating layer 2 is further outside the first insulating layer 2.
  • the first insulating layer 2 may be further laminated on the outside thereof.
  • the second insulating layer 3 is laminated, the second insulating layer 3 is laminated outside the second insulating layer 3, and the first insulating layer 3 is further outside the second insulating layer 3.
  • the second insulating layer 3 may be further laminated on the outside thereof.
  • the first insulating layer 2 and the second insulating layer 3 are formed by stacking the first insulating layer 2 and the second insulating layer 3 in the insulating layer. It is only necessary that the insulating layers 2 and the second insulating layers 3 are alternately stacked.
  • the second insulating layer 3 is made of a material having a relative dielectric constant lower than that of the first insulating layer 2.
  • the first insulating layer 2 is made of PET (Polyethylene terephthalate: PET) film, PEN (Polyethylene terephthalate: PEN) film, PPS (Polyethylene sulfide film: PPS) film, silicon tape, rayon tape, or the like.
  • the second insulating layer 3 is made of insulating paper or crepe paper.
  • the first insulating layer 2 having a high relative dielectric constant hinders the acceleration of electrons that are the origin of dielectric breakdown.
  • the second insulating layer 3 having a low relative dielectric constant lowers the equipotential line so as to make the charge on the surface of the insulating layer sparse, in other words, lowers the potential at the same distance from the lead conductor 1. That is, while the potential of the surface of the first insulating layer 2 is lowered in the second insulating layer 3, the adjacent first insulating layer 2 is accelerated before electrons are accelerated to breakdown in the second insulating layer 3. This hinders the acceleration of electrons.
  • first insulating layer 2 and the second insulating layer 3 are alternately stacked until the electric field on the outermost peripheral surface of the insulating layer is sufficiently smaller than the dielectric breakdown voltage of the insulating gas 5, acceleration of electrons is inhibited. And the potential reduction can be appropriately separated, and the entire insulating layer is thinned, and electric field concentration can be prevented.
  • the electric field on the outer peripheral surface of the first insulating layer 2 can be lowered, so that only the first insulating layer 2 is repeatedly wound.
  • the insulating layer can be configured with a smaller number of layers and the thickness of the entire insulating layer can be reduced.
  • the gas-insulated static induction apparatus includes a lead conductor 1 housed in a container 6 filled with a natural gas 5, a first insulating layer 2 covering the lead conductor 1, and a lead conductor 1. And a second insulating layer 3 having a relative dielectric constant lower than that of the first insulating layer 2.
  • the first insulating layer 2 and the second insulating layer 3 are alternately stacked and disposed toward the outside in the radial direction of the lead conductor 1, and continuously extend and surround the entire circumference of the lead conductor 1. ing.
  • the insulating layer is configured with a smaller number of layers than the conventional one, and the entire insulating layer is thin. Therefore, it is possible to reduce the size of the gas-insulated static induction device.
  • the gas-insulated static induction electric appliance can be manufactured with fewer man-hours than before due to the reduction in the number of layers, the manufacturing cost of the gas-insulated static induction electric appliance can be reduced.
  • the first insulating layer 2 and the second insulating layer 3 change the thickness ratio of the first insulating layer 2 and the second insulating layer 3, for example, the thickness of the second insulating layer 3 is changed to
  • the thickness of the first insulating layer 2 may be at least equal to or greater than the thickness.
  • the second insulating layer 3 having a low relative dielectric constant is lighter in weight than the first insulating layer 2 having a high relative dielectric constant, and is often inexpensive and easy to process. For this reason, by increasing the thickness of the second insulating layer 3, the number of processing steps can be reduced and the weight of the entire insulating layer can be reduced.
  • the thickness of the second insulating layer 3 is too thick, the energy of electrons accelerated in the second insulating layer 3 increases, and the acceleration of electrons in the first insulating layer 2 can be stopped. There may be cases where this is not possible.
  • the lead wire 100 causes dielectric breakdown and discharges. Therefore, in order to avoid the discharge of the lead wire 100, the thickness of the second insulating layer 3 having a low relative dielectric constant is, for example, not more than 10 times the thickness of the first insulating layer 2, and the second It is desirable to prevent discharge of the lead wire 100 by setting the thickness of the insulating layer 3 to 10 mm or less.
  • a gas-insulated static induction electric machine having a smaller number of processing than the prior art can be manufactured. Can do.
  • the lead wire 100 drawn from the winding has been described as an example.
  • the lead wire 100 is an example of a conductor that requires a coating with an insulating film, and is not limited thereto. is not.
  • it can be used for a conductor with concentrated electric field, such as a bushing shield or an electrostatic ring. More specifically, it can be used for a conductor having a radius of curvature, a conductor having a curved electric force line, that is, an electrode other than a flat plate.
  • FIG. 2 is a cross-sectional view showing a schematic configuration of the lead wire 100 drawn from the winding of the gas-insulated static induction electric device according to the second embodiment.
  • 2A shows a cross-sectional view of the lead wire 100
  • FIG. 2B shows embossing
  • FIG. 2C shows an enlarged explanatory view of the region P in FIG. 2A. .
  • the first insulating layer 2 and the second insulating layer 3 are formed by a single insulating film IF.
  • the insulating film IF is made of PET film, PEN film, PPS film, silicon tape, rayon tape, or the like.
  • the insulating film IF has an uneven surface on one side S by embossing.
  • the unevenness is formed by partially crushing the insulating film IF on one surface S of the insulating film IF to a depth that does not reach the opposite surface R from the one surface S, and is formed by embossing from the non-embossed opposite surface R.
  • the thickness band up to the bottom surface B of the recessed portion is the first insulating layer 2.
  • the thickness band from the embossed one side S to the bottom surface B of the recess formed by embossing is the second insulating layer 3.
  • the second insulating layer 3 includes a cavity layer of a recess.
  • the second insulating layer 3 is formed by the natural gas 5 filled in the container 6 in which the winding is accommodated entering the gap of the recess.
  • the relative dielectric constant ⁇ 2 of the second insulating layer 3 is set lower than the relative dielectric constant ⁇ 1 of the first insulating layer 2.
  • ⁇ g ⁇ 2 ⁇ 1 (2)
  • the gas-insulated static induction apparatus includes an insulating film IF wound around the lead conductor 1.
  • Insulating film IF is formed with a recess having a depth that does not reach from one surface S to opposite surface R on one surface S.
  • the first insulating layer 2 is formed of a thickness band from the opposite surface R to the bottom surface B of the recess.
  • the second insulating layer 3 is a thickness band from one side S to the bottom surface B of the recess.
  • the second insulating layer 3 includes a concave space.
  • the gas 5 derived from nature can enter the void layer of the recess formed in the insulating film IF by embossing, and the second insulating layer 3 can be formed in the radial direction of the lead conductor 1. Therefore, the 1st insulating layer 2 and the 2nd insulating layer 3 can be formed with one insulating film IF.
  • the first insulating layer 2 and the second insulating layer 3 are alternately arranged. Compared to the case of stacking, the number of stacking can be reduced, and the gas-insulated static induction device can be manufactured with fewer man-hours than before, so that the manufacturing cost of the gas-insulated static induction device can be reduced.
  • embossing means what the unevenness
  • the surface of the insulating film IF may be physically uneven.
  • the surface of the insulating film IF may be processed by a laser to provide unevenness, or the surface may be provided with a mold or etching treatment of the insulating film IF. Good.
  • FIG. 3 is a cross-sectional view showing a schematic configuration of a plurality of layers formed by embossing laminated on a lead wire in a gas-insulated static induction device according to a third embodiment.
  • the outermost layer of the insulating layer composed of a plurality of layers is configured to be the first insulating layer 2.
  • the insulating layer other than the outermost layer is embossed to form a plurality of layers of the first insulating layer 2 and the second insulating layer 3.
  • the insulating layer is composed of a plurality of layers of the first insulating layer 2 and the second insulating layer 3 by wrapping the lead conductor 1 with the embossed surfaces S facing each other.
  • the outermost layer is the first insulating layer 2 having a high relative dielectric constant. Note that, as shown in FIG. 2B, a plurality of the first insulating layer 2 and the second insulating layer 3 can be obtained by winding all the embossed surfaces S toward the lead conductor 1 side.
  • the outermost layer may be the first insulating layer 2 having a high relative dielectric constant.
  • the surface R of the outermost layer of the plurality of insulating layers is smooth.
  • the surface R of the outermost layer is in contact with the insulating gas 5 on the surface that has not been embossed.
  • the surface R of the outermost layer can also be a factor that determines the insulating performance by the roughness of the surface in contact with the insulating gas 5. Therefore, the insulating performance can be further improved by the smoothness of the outermost surface R of the insulating layer.
  • the outermost layer of the insulating layers may be the first insulating layer 2 having a high relative dielectric constant.
  • the material of the first insulating layer 2 it is preferable to use a nonflammable or flame retardant material.
  • the insulating gas for example, when the naturally derived gas 5 mainly composed of air, nitrogen, oxygen, carbon dioxide, or two or more of these is used, the gas containing oxygen has an auxiliary property.
  • the lead conductor 1 is discharged by using a nonflammable or flame retardant material that does not allow oxygen to permeate from the surface R of the lead wire 100 to the outermost layer, for example, the relative permittivity of Since the high first insulating layer 2 can block oxygen, a fire can be prevented even when the lead conductor 1 is discharged.
  • a PET film or a PEN film as the material of the outermost layer.

Abstract

Provided is a gas-insulated static induction electrical apparatus with which the size can be reduced even when a container is filled with a naturally derived gas. This invention is provided with: a lead conductor 1 housed in a container 6 filled with a naturally derived gas; first insulating layers 2 coating the lead conductor 1; and second insulating layers 3 coating the lead conductor 1, the second insulating layers 3 having a relative permittivity lower than that of the first insulating layers 2. The first insulating layers 2 and the second insulating layers 3 are alternately stacked towards the outer side in the radial direction of the lead conductor 1, and surround the lead conductor 1 so as to extend continuously around the entire periphery of the lead conductor 1.

Description

ガス絶縁静止誘導電器Gas insulated static induction machine
　本発明の実施形態は、ガス絶縁変圧器又はガス絶縁リアクトルなどとして使用されるガス絶縁静止誘導電器に関する。 Embodiments of the present invention relate to a gas-insulated static induction device used as a gas-insulated transformer or a gas-insulated reactor.
　現在、都市部の地下変電所や屋外の変電所には、小型で安全性の高いガス絶縁変圧器やガス絶縁リアクトルなどのガス絶縁静止誘導電器が設置されている。このガス絶縁静止誘導電器には、巻線を収納する容器が設けられている。容器には、巻線の放電を防止するために、例えば、絶縁ガスとして耐圧の高いＳＦ６ガスが封入されている。巻線には、リード線が接続されており、そのリード線は、巻線から引き出されている。リード線の表面は、電界が発生するために絶縁弱点部となっており、絶縁破壊による放電しやすい箇所となっている。そこで、リード線の絶縁性能を向上させるためにプラスチック製の絶縁フィルムをリード線に巻回し、リード線を被覆した絶縁層とすることが一般的である。絶縁フィルムには、例えば、高い絶縁性能を持ち、かつ比較的安価なＰＥＴ（Polyethylene terephthalate ：ＰＥＴ）フィルムが主に用いられる。ＰＥＴフィルムはプラスチックフィルムであるため、比誘電率が高い。 At present, underground substations and outdoor substations in urban areas are equipped with gas-insulated static induction devices such as small and highly safe gas-insulated transformers and gas-insulated reactors. The gas-insulated static induction appliance is provided with a container for storing a winding. In order to prevent the winding from being discharged, the container is filled with, for example, SF 6 gas having a high pressure resistance as an insulating gas. A lead wire is connected to the winding, and the lead wire is drawn from the winding. The surface of the lead wire serves as an insulation weak point due to the generation of an electric field, and is a location where discharge due to dielectric breakdown is likely to occur. Therefore, in order to improve the insulating performance of the lead wire, it is common to wind an insulating film made of plastic around the lead wire to form an insulating layer covering the lead wire. As the insulating film, for example, a PET (Polyethylene terephthalate: PET) film having high insulating performance and relatively inexpensive is mainly used. Since the PET film is a plastic film, it has a high relative dielectric constant.
　近年、ＳＦ６ガスは地球温暖化ガスであるため、その使用量の削減或いは代替ガスが求められている。代替ガスとしては、自然由来のガスが挙げられ、例えば、空気、窒素、酸素、二酸化炭素又はこれらの２種以上を主成分とするガスが挙げられる。これら自然由来のガスはＳＦ６ガスと比べて耐圧が低いため、絶縁フィルムをリード線に被覆することによってリード線の絶縁性能を確保する場合は、絶縁フィルムの最外周面における電界を十分に下げるべく、リード線の周りに被覆される絶縁フィルムを幾重にも巻き付け、リード線の表面から絶縁フィルムの最外周面の表面までの距離を十分に確保する必要がある。絶縁フィルムをリード線に幾重にも巻き付けると、絶縁フィルムにより成る絶縁層は、厚くなってしまう。その結果、リード線が大型化し、ガス絶縁静止誘導電器の大型化を招来する。 In recent years, since SF 6 gas is a global warming gas, reduction of its use amount or alternative gas has been demanded. Examples of the alternative gas include naturally derived gas, and examples thereof include air, nitrogen, oxygen, carbon dioxide, or a gas mainly composed of two or more of these. Since these naturally derived gases have a lower pressure resistance than SF 6 gas, when the insulation performance of the lead wire is ensured by covering the lead wire with the insulation film, the electric field at the outermost peripheral surface of the insulation film is sufficiently lowered. Therefore, it is necessary to wrap the insulating film to be covered around the lead wire several times and to secure a sufficient distance from the surface of the lead wire to the outermost peripheral surface of the insulating film. When the insulating film is wound around the lead wire several times, the insulating layer made of the insulating film becomes thick. As a result, the lead wire becomes large, leading to an increase in the size of the gas-insulated static induction device.
　ここで、エンボス加工により凹凸を絶縁フィルムの片面に施したフィルムをリード線の表面に巻回し被覆する方法が提案されている。この方法によれば、凹凸部分の空隙にＳＦ６ガスが入り込み、絶縁フィルムの空隙を含む厚み帯が絶縁フィルム全体の絶縁破壊強度を高めるものである。尚、エンボス加工を施す絶縁フィルムとしては、ＰＥＴフィルムの他、ポリフェニレンサルファイドフィルム（Polyethylene sulfide film：ＰＰＳ）の外側にポリエチレンナフタレートを巻き付けて、絶縁フィルムの耐熱性能を向上させる案が提示されている。また、エンボス加工が施されたＰＥＴフィルムの外側に、伸び率の高い熱可塑性エラストマーフィルムを被覆し、ＰＥＴフィルムの密着性を向上させるガス絶縁静止誘導電器も提案されている。 Here, a method has been proposed in which a film in which unevenness is provided on one surface of an insulating film by embossing is wound around the surface of a lead wire and covered. According to this method, SF 6 gas enters the voids of the uneven portions, and the thickness band including the voids of the insulating film increases the dielectric breakdown strength of the entire insulating film. In addition, as an insulating film to be embossed, a proposal has been proposed in which polyethylene naphthalate is wrapped around a polyphenylene sulfide film (PPS) in addition to a PET film to improve the heat resistance performance of the insulating film. . In addition, a gas-insulated static induction appliance has also been proposed in which a thermoplastic elastomer film having a high elongation rate is coated on the outside of an embossed PET film to improve the adhesion of the PET film.
特開平２－１６７０５号公報Japanese Patent Laid-Open No. 2-16705 特開平９－３５９４６号公報Japanese Patent Laid-Open No. 9-35946 特開平１１－１７６６５７号公報Japanese Patent Laid-Open No. 11-176657
　上記の従来技術は、絶縁破壊強度の高いＳＦ６ガスを絶縁フィルム内の空隙の層に入り込ませることで、絶縁フィルム全体としての絶縁破壊強度を向上させることを目的としている。一方、自然由来のガスはＳＦ６ガスと比べて耐圧が低いため、エンボス加工を施した絶縁フィルム内の空隙の層に自然由来のガスを入り込ませても絶縁破壊強度を高めることは期待できない。即ち、エンボス加工を施した絶縁フィルムでリード線を巻回して被覆する技術は、絶縁破壊強度の高いＳＦ６ガスを容器に充填する場合に限り有効であり、耐圧の低い自然由来のガスを容器に充填する場合には、別の方策が必要であると考えられていた。 The above prior art aims to improve the dielectric breakdown strength of the entire insulating film by allowing SF 6 gas having a high dielectric breakdown strength to enter the void layer in the insulating film. On the other hand, since naturally derived gas has a lower pressure resistance than SF 6 gas, it is not expected to increase the dielectric breakdown strength even if the naturally derived gas enters the void layer in the embossed insulating film. That is, the technique of winding the lead wire with the embossed insulating film and covering it is effective only when the container is filled with SF 6 gas having a high dielectric breakdown strength. It was thought that another approach was necessary when filling the jar.
　一方、リード線の絶縁性能の確保するために絶縁フィルムをリード線に幾重にも巻き付ける技術の場合は、自然由来のガスは、ＳＦ６ガスと比べて耐圧が低いため、絶縁フィルムにより成る絶縁層が、より一層厚くなってしまい、ガス絶縁静止誘導電器の大型化を招来する。 On the other hand, in the case of a technique in which an insulating film is wound around the lead wire in order to ensure the insulation performance of the lead wire, the naturally-occurring gas has a lower withstand voltage than the SF 6 gas, so the insulating layer made of the insulating film However, the thickness is further increased, which leads to an increase in the size of the gas-insulated static induction appliance.
　本発明が解決しようとする課題は、自然由来のガスを容器に充填しても、小型化を図ることのできるガス絶縁静止誘導電器を提供することにある。 The problem to be solved by the present invention is to provide a gas-insulated static induction device that can be miniaturized even when a gas derived from nature is filled in a container.
　本発明者らは、鋭意研究の結果、絶縁層の最外周面の電界値を下げるための比誘電率の低い絶縁層と、電子の加速を阻害する比誘電率の高い絶縁層とを巻回し、積層しながら導体に交互に被覆することにより、絶縁層の最外周面の電界値を効率的に低下させつつ、比誘電率の低い層で生じる絶縁破壊の発端となる電子の加速を阻害し、導体を被覆する絶縁層内にＳＦ６ガスのような絶縁破壊強度の高い層が存在しなくても絶縁性能を向上させることができることを見出した。即ち、ＳＦ６ガスよりも耐圧の低い自然由来のガスの存在下であっても、比誘電率の高い絶縁フィルムのみで絶縁層を構成する場合と比べ、絶縁層全体の厚みを薄厚化できることを見出した。 As a result of diligent research, the present inventors have wound an insulating layer having a low relative dielectric constant to lower the electric field value on the outermost peripheral surface of the insulating layer and an insulating layer having a high relative dielectric constant that inhibits electron acceleration. By covering the conductors alternately while laminating, the electric field value of the outermost peripheral surface of the insulating layer is effectively reduced, and the acceleration of electrons that are the starting point of dielectric breakdown occurring in the layer having a low relative dielectric constant is inhibited. It has been found that the insulation performance can be improved even when there is no high breakdown strength layer such as SF 6 gas in the insulation layer covering the conductor. That is, even in the presence of a naturally derived gas having a lower withstand voltage than SF 6 gas, it is possible to reduce the thickness of the entire insulating layer as compared with the case where the insulating layer is configured only by an insulating film having a high relative dielectric constant. I found it.
　本実施形態に係るガス絶縁静止誘導電器は、自然由来のガスが充填された容器に収容された導体と、前記導体を被覆する第１の絶縁層と、前記導体を被覆し、前記第１の絶縁層よりも比誘電率の低い第２の絶縁層と、を備え、前記第１の絶縁層と前記第２の絶縁層は、前記導体の半径方向外側に向かって交互に積層されて設置されるとともに、前記導体の全周囲に亘って連続的に延びて囲っていること、を特徴とする。 The gas-insulated static induction electrical appliance according to the present embodiment includes a conductor housed in a container filled with a naturally derived gas, a first insulating layer that covers the conductor, the conductor, and the first conductor. A second insulating layer having a relative dielectric constant lower than that of the insulating layer, wherein the first insulating layer and the second insulating layer are alternately stacked and disposed toward the outside in the radial direction of the conductor. And extending continuously around the entire circumference of the conductor.
第１の実施形態に係るガス絶縁静止誘導電器の巻線から引き出されたリード線の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the lead wire withdraw | derived from the coil | winding of the gas insulated static induction electric machine which concerns on 1st Embodiment. 第２の実施形態に係るガス絶縁静止誘導電器の巻線から引き出されたリード線の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the lead wire withdraw | derived from the coil | winding of the gas insulated static induction electric machine which concerns on 2nd Embodiment. 第３の実施形態に係るガス絶縁静止誘導電器におけるリード線に積層されたエンボス加工により成る複数層の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the several layer which consists of embossing laminated | stacked on the lead wire in the gas insulated static induction electric machine which concerns on 3rd Embodiment.
　［第１の実施形態］
　（１－１．構成）
　第１の実施形態に係るガス絶縁静止誘導電器について、図面を参照しつつ詳細に説明する。図１は、第１の実施形態に係るガス絶縁静止誘導電器の巻線から引き出されたリード線１００の概略構成を示す断面図である。 [First Embodiment]
(1-1. Configuration)
The gas-insulated static induction device according to the first embodiment will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a schematic configuration of a lead wire 100 drawn from a winding of a gas-insulated static induction device according to the first embodiment.
　ガス絶縁静止誘導電器は、容器６を有する。この容器６には、絶縁ガス５が封入されている。容器６には、絶縁ガスとして自然由来のガス５が封入されている。自然由来のガス５は、空気、窒素、酸素、二酸化炭素又はこれら２種以上を主成分とし、ＳＦ６ガスよりも耐圧が低い。容器６内には、図示しない巻線が設けられ、この巻線からリード線１００が引き出され、リード線１００は、巻線とともに容器６内に設置されている。 The gas insulated static induction machine has a container 6. An insulating gas 5 is sealed in the container 6. The container 6 is filled with a natural gas 5 as an insulating gas. The naturally derived gas 5 is mainly composed of air, nitrogen, oxygen, carbon dioxide, or two or more thereof, and has a lower pressure resistance than SF 6 gas. A winding (not shown) is provided in the container 6, and a lead wire 100 is drawn out from the winding. The lead wire 100 is installed in the container 6 together with the winding.
　図１に示すように、巻線から引き出されたリード線１００は、リード導体１と、絶縁層２００と、を備えている。リード導体１は、導体から成る芯である。絶縁層２００は、リード導体１を被覆する第１の絶縁層２と、リード導体１を被覆し、第１の絶縁層２よりも比誘電率の低い第２の絶縁層３と、を備えている。第１の絶縁層２と第２の絶縁層３は、リード導体１の半径方向外側に向かって交互に積層されて設置されるとともに、リード導体１の全周囲に亘って連続的に延びて囲っている。絶縁層２００は、リード導体１の外側に設置される第１の絶縁層２と、リード導体１の外側に設置される第２の絶縁層３との複数層から成る。 As shown in FIG. 1, the lead wire 100 drawn out from the winding includes a lead conductor 1 and an insulating layer 200. The lead conductor 1 is a core made of a conductor. The insulating layer 200 includes a first insulating layer 2 that covers the lead conductor 1, and a second insulating layer 3 that covers the lead conductor 1 and has a relative dielectric constant lower than that of the first insulating layer 2. Yes. The first insulating layer 2 and the second insulating layer 3 are alternately stacked and disposed toward the outside in the radial direction of the lead conductor 1, and continuously extend and surround the entire circumference of the lead conductor 1. ing. The insulating layer 200 is composed of a plurality of layers of a first insulating layer 2 disposed outside the lead conductor 1 and a second insulating layer 3 disposed outside the lead conductor 1.
　第１の絶縁層２と第２の絶縁層３は、それぞれ材質の異なる絶縁フィルムにより成る。この材質の異なる絶縁フィルムは、リード導体１にそれぞれ巻回される。第１の絶縁層２と第２の絶縁層３は、リード導体１に交互に複数回巻回されている。即ち、第１の絶縁層２と第２の絶縁層３は、リード導体１の周囲を取り囲むように巻き付けられ、リード導体１には、第１の絶縁層２と第２の絶縁層３とが交互に積層されている。第１の絶縁層２と第２の絶縁層３とが交互に積層され、リード導体１を被覆することにより、複数層からなる絶縁層を構成する。第１の絶縁層２と第２の絶縁層３は、絶縁層のうちの最外層の表面の電界が絶縁ガス５の絶縁破壊電圧と比較して十分小さくなるまで積層される。 The first insulating layer 2 and the second insulating layer 3 are made of insulating films made of different materials. The insulating films made of different materials are wound around the lead conductor 1. The first insulating layer 2 and the second insulating layer 3 are alternately wound around the lead conductor 1 a plurality of times. That is, the first insulating layer 2 and the second insulating layer 3 are wound so as to surround the periphery of the lead conductor 1, and the first insulating layer 2 and the second insulating layer 3 are wrapped around the lead conductor 1. They are stacked alternately. The first insulating layer 2 and the second insulating layer 3 are alternately stacked, and the lead conductor 1 is covered to form an insulating layer composed of a plurality of layers. The first insulating layer 2 and the second insulating layer 3 are stacked until the electric field on the surface of the outermost layer of the insulating layers is sufficiently smaller than the dielectric breakdown voltage of the insulating gas 5.
　例えば、図１に示すように、リード導体１に隣接して最内殻には第１の絶縁層２が積層され、その第１の絶縁層２の外側には第２の絶縁層３が積層され、最外周面まで第１の絶縁層２と第２の絶縁層３とが交互に積層されている。なお、これは例示であり、これに限定されるものではない。これに代えて、リード導体１に隣接して最内殻には第２の絶縁層３が積層され、この第２の絶縁層３の外側には第１の絶縁層２が積層され、最外周面まで第２の絶縁層３と第１の絶縁層２とが交互に積層されていてもよい。 For example, as shown in FIG. 1, a first insulating layer 2 is laminated on the innermost shell adjacent to the lead conductor 1, and a second insulating layer 3 is laminated outside the first insulating layer 2. The first insulating layers 2 and the second insulating layers 3 are alternately stacked up to the outermost peripheral surface. This is merely an example, and the present invention is not limited to this. Instead, the second insulating layer 3 is laminated on the innermost shell adjacent to the lead conductor 1, and the first insulating layer 2 is laminated on the outer side of the second insulating layer 3. The second insulating layer 3 and the first insulating layer 2 may be alternately stacked up to the surface.
　また、積層順に関しては、第１の絶縁層２が積層され、その第１の絶縁層２の外側にも第１の絶縁層２が積層され、さらにその第１の絶縁層２の外側に第２の絶縁層３が積層された後、さらにその外側に第１の絶縁層２が積層されていてもよい。また同様に、第２の絶縁層３が積層され、その第２の絶縁層３の外側にも第２の絶縁層３が積層され、さらにその第２の絶縁層３の外側に第１の絶縁層２が積層された後、さらにその外側に第２の絶縁層３が積層されていてもよい。このように、第１の絶縁層２と第２の絶縁層３は、絶縁層において、第１の絶縁層２と第２の絶縁層３とが積層されることにより、結果として、第１の絶縁層２と第２の絶縁層３とが交互に積層されていればよい。 In addition, regarding the stacking order, the first insulating layer 2 is stacked, the first insulating layer 2 is stacked outside the first insulating layer 2, and the first insulating layer 2 is further outside the first insulating layer 2. After the two insulating layers 3 are laminated, the first insulating layer 2 may be further laminated on the outside thereof. Similarly, the second insulating layer 3 is laminated, the second insulating layer 3 is laminated outside the second insulating layer 3, and the first insulating layer 3 is further outside the second insulating layer 3. After the layer 2 is laminated, the second insulating layer 3 may be further laminated on the outside thereof. As described above, the first insulating layer 2 and the second insulating layer 3 are formed by stacking the first insulating layer 2 and the second insulating layer 3 in the insulating layer. It is only necessary that the insulating layers 2 and the second insulating layers 3 are alternately stacked.
　第２の絶縁層３は、第１の絶縁層２よりも比誘電率が低い材質により成る。第１の絶縁層２の比誘電率ε１と第２の絶縁層３の比誘電率ε２との関係は、絶縁ガス５の比誘電率をεｇとすると、次式（１）を満たす関係とする。
　　εｇ≦ε２＜ε１　　　　　　　　　　　・・・（１） The second insulating layer 3 is made of a material having a relative dielectric constant lower than that of the first insulating layer 2. The relationship between the relative dielectric constant epsilon 2 of the first dielectric constant epsilon 1 of the insulating layer 2 and the second insulating layer 3, when the relative dielectric constant of the insulating gas 5 and epsilon g, satisfies the following formula (1) It is related.
ε g ≦ ε 2 <ε 1 (1)
　例えば、第１の絶縁層２は、ＰＥＴ（Polyethylene terephthalate ：ＰＥＴ）フィルム、ＰＥＮ（Polyethylene terephthalate ：ＰＥＮ）フィルム、ＰＰＳ（Polyethylene sulfide film：ＰＰＳ）フィルム、シリコンテープ又はレーヨンテープなどにより成る。一方、第２の絶縁層３は、絶縁紙又はクレープ紙などにより成る。 For example, the first insulating layer 2 is made of PET (Polyethylene terephthalate: PET) film, PEN (Polyethylene terephthalate: PEN) film, PPS (Polyethylene sulfide film: PPS) film, silicon tape, rayon tape, or the like. On the other hand, the second insulating layer 3 is made of insulating paper or crepe paper.
　（１－２．作用）
　第１の実施形態のガス絶縁静止誘導電器の作用について、説明する。まず、比誘電率の高い第１の絶縁層２は、絶縁破壊の発端となる電子の加速を阻害する。一方、比誘電率の低い第２の絶縁層３は、絶縁層表面の電荷を疎にするように等電位線を引き下げ、換言すると、リード導体１からの同一の距離における電位を下げる。即ち、第２の絶縁層３において第１の絶縁層２の表面の電位を下げつつ、この第２の絶縁層３で電子が絶縁破壊に至るまで加速する前に隣の第１の絶縁層２で電子の加速を阻害する。第１の絶縁層２と第２の絶縁層３は、絶縁層の最外周面の電界が絶縁ガス５の絶縁破壊電圧と比較して十分小さくなるまで交互に積層されるので、電子の加速阻害と電位の引き下げを適度に区切ることができ、絶縁層全体が薄くなり、電界集中を防止することができる。 (1-2. Action)
The operation of the gas-insulated static induction apparatus of the first embodiment will be described. First, the first insulating layer 2 having a high relative dielectric constant hinders the acceleration of electrons that are the origin of dielectric breakdown. On the other hand, the second insulating layer 3 having a low relative dielectric constant lowers the equipotential line so as to make the charge on the surface of the insulating layer sparse, in other words, lowers the potential at the same distance from the lead conductor 1. That is, while the potential of the surface of the first insulating layer 2 is lowered in the second insulating layer 3, the adjacent first insulating layer 2 is accelerated before electrons are accelerated to breakdown in the second insulating layer 3. This hinders the acceleration of electrons. Since the first insulating layer 2 and the second insulating layer 3 are alternately stacked until the electric field on the outermost peripheral surface of the insulating layer is sufficiently smaller than the dielectric breakdown voltage of the insulating gas 5, acceleration of electrons is inhibited. And the potential reduction can be appropriately separated, and the entire insulating layer is thinned, and electric field concentration can be prevented.
　また、第１の絶縁層２に第２の絶縁層３を積層することにより、第１の絶縁層２の外周面の電界を下げることができるので、第１の絶縁層２のみを繰り返し巻く場合よりも、少ない積層数で絶縁層を構成するとともに、絶縁層全体の厚みを薄厚化することができる。 Also, by laminating the second insulating layer 3 on the first insulating layer 2, the electric field on the outer peripheral surface of the first insulating layer 2 can be lowered, so that only the first insulating layer 2 is repeatedly wound. In addition, the insulating layer can be configured with a smaller number of layers and the thickness of the entire insulating layer can be reduced.
　（１－３．効果）
　第１の実施形態のガス絶縁静止誘導電器は、自然由来のガス５が充填された容器６に収容されたリード導体１と、リード導体１を被覆する第１の絶縁層２と、リード導体１を被覆し、第１の絶縁層２よりも比誘電率の低い第２の絶縁層３と、を備えている。第１の絶縁層２と第２の絶縁層３は、リード導体１の半径方向外側に向かって交互に積層されて設置されるとともに、リード導体１の全周囲に亘って連続的に延びて囲っている。 (1-3. Effects)
The gas-insulated static induction apparatus according to the first embodiment includes a lead conductor 1 housed in a container 6 filled with a natural gas 5, a first insulating layer 2 covering the lead conductor 1, and a lead conductor 1. And a second insulating layer 3 having a relative dielectric constant lower than that of the first insulating layer 2. The first insulating layer 2 and the second insulating layer 3 are alternately stacked and disposed toward the outside in the radial direction of the lead conductor 1, and continuously extend and surround the entire circumference of the lead conductor 1. ing.
　これにより、ＳＦ６ガスよりも耐圧の低い自然由来のガス５をガス絶縁静止誘導電器の容器６に充填させても、従来よりも少ない積層数で絶縁層を構成するとともに、絶縁層全体の薄厚化を図ることができ、ガス絶縁静止誘導電器の小型化を図ることができる。また、積層数の減少によりガス絶縁静止誘導電器を従来よりも少ない工数で製造できるので、ガス絶縁静止誘導電器の製造コストも削減できる。 As a result, even when the naturally-derived gas 5 having a lower withstand pressure than the SF 6 gas is filled in the container 6 of the gas-insulated static induction device, the insulating layer is configured with a smaller number of layers than the conventional one, and the entire insulating layer is thin. Therefore, it is possible to reduce the size of the gas-insulated static induction device. In addition, since the gas-insulated static induction electric appliance can be manufactured with fewer man-hours than before due to the reduction in the number of layers, the manufacturing cost of the gas-insulated static induction electric appliance can be reduced.
　（第１の実施形態の変形例）
　第１の絶縁層２と第２の絶縁層３は、第１の絶縁層２と第２の絶縁層３の厚さの比率を変更し、例えば、第２の絶縁層３の厚さを、第１の絶縁層２の厚さの少なくとも等倍以上とするようにしてもよい。 (Modification of the first embodiment)
The first insulating layer 2 and the second insulating layer 3 change the thickness ratio of the first insulating layer 2 and the second insulating layer 3, for example, the thickness of the second insulating layer 3 is changed to The thickness of the first insulating layer 2 may be at least equal to or greater than the thickness.
　比誘電率の低い第２の絶縁層３は、比誘電率の高い第１の絶縁層２よりも重量が軽く、安価で加工が容易な場合が多い。このため、第２の絶縁層３の厚さを厚くすることにより、加工工数を減らすとともに絶縁層全体の重量を軽くすることができる。 The second insulating layer 3 having a low relative dielectric constant is lighter in weight than the first insulating layer 2 having a high relative dielectric constant, and is often inexpensive and easy to process. For this reason, by increasing the thickness of the second insulating layer 3, the number of processing steps can be reduced and the weight of the entire insulating layer can be reduced.
　一方、第２の絶縁層３の厚さをあまりに厚くしすぎると、第２の絶縁層３内で加速した電子のエネルギーが大きくなり、第１の絶縁層２内で電子の加速を止めることができない場合も生じ得る。第１の絶縁層２内で電子を止めることができない場合は、リード線１００は、絶縁破壊を起こし、放電することになる。そこで、リード線１００の放電を回避するため、比誘電率の低い第２の絶縁層３の厚さは、例えば、第１の絶縁層２の厚さの１０倍以下とし、また、第２の絶縁層３の厚さを１０ｍｍ以下とすることにより、リード線１００の放電を防ぐことが望ましい。このように、第２の絶縁層３の厚さを第１の絶縁層２の厚さの等倍以上に厚くすることにより、従来よりも、加工数の少ないガス絶縁静止誘導電器を製造することができる。 On the other hand, if the thickness of the second insulating layer 3 is too thick, the energy of electrons accelerated in the second insulating layer 3 increases, and the acceleration of electrons in the first insulating layer 2 can be stopped. There may be cases where this is not possible. When electrons cannot be stopped in the first insulating layer 2, the lead wire 100 causes dielectric breakdown and discharges. Therefore, in order to avoid the discharge of the lead wire 100, the thickness of the second insulating layer 3 having a low relative dielectric constant is, for example, not more than 10 times the thickness of the first insulating layer 2, and the second It is desirable to prevent discharge of the lead wire 100 by setting the thickness of the insulating layer 3 to 10 mm or less. As described above, by making the thickness of the second insulating layer 3 equal to or greater than the thickness of the first insulating layer 2, a gas-insulated static induction electric machine having a smaller number of processing than the prior art can be manufactured. Can do.
　尚、第１の実施形態では、巻線から引き出したリード線１００を例に説明したが、リード線１００は、絶縁フィルムによる被膜を必要とする導体としての一例であり、これに限定されるものではない。例えば、ブッシングシールドや静電リングなど電界が集中する導体に対しても用いることができる。より具体的には、曲率半径を有する形状の導体や、電気力線の曲がる形状の導体、即ち、平板以外の電極に用いることができる。 In the first embodiment, the lead wire 100 drawn from the winding has been described as an example. However, the lead wire 100 is an example of a conductor that requires a coating with an insulating film, and is not limited thereto. is not. For example, it can be used for a conductor with concentrated electric field, such as a bushing shield or an electrostatic ring. More specifically, it can be used for a conductor having a radius of curvature, a conductor having a curved electric force line, that is, an electrode other than a flat plate.
　［第２の実施形態］
　（２－１．構成）
　次に、第２の実施形態に係るガス絶縁静止誘導電器について、図面を参照しつつ詳細に説明する。第１の実施形態と同一構成については、同一符号を付して詳細な説明を省略する。図２は、第２の実施形態に係るガス絶縁静止誘導電器の巻線から引き出されたリード線１００の概略構成を示す断面図である。図２（ａ）ではリード線１００の断面図を示し、図２（ｂ）ではエンボス加工を示し、図２（ｃ）では、図２（ａ）の領域Ｐを拡大した説明図を示している。 [Second Embodiment]
(2-1. Configuration)
Next, a gas insulated static induction apparatus according to a second embodiment will be described in detail with reference to the drawings. About the same structure as 1st Embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted. FIG. 2 is a cross-sectional view showing a schematic configuration of the lead wire 100 drawn from the winding of the gas-insulated static induction electric device according to the second embodiment. 2A shows a cross-sectional view of the lead wire 100, FIG. 2B shows embossing, and FIG. 2C shows an enlarged explanatory view of the region P in FIG. 2A. .
　図２に示すように、巻線から引き出されたリード線１００では、第１の絶縁層２と第２の絶縁層３とが１枚の絶縁フィルムＩＦにより形成されている。絶縁フィルムＩＦは、ＰＥＴフィルム、ＰＥＮフィルム、ＰＰＳフィルム、シリコンテープ又はレーヨンテープなどにより成る。 As shown in FIG. 2, in the lead wire 100 drawn from the winding, the first insulating layer 2 and the second insulating layer 3 are formed by a single insulating film IF. The insulating film IF is made of PET film, PEN film, PPS film, silicon tape, rayon tape, or the like.
　絶縁フィルムＩＦには、エンボス加工により凹凸が片面Ｓに施されている。凹凸は、絶縁フィルムＩＦの片面Ｓに、その片面Ｓから反対面Ｒに至らない程度の深さまで絶縁フィルムＩＦを部分的に押し潰して成り、エンボス加工されていない反対面Ｒからエンボス加工により形成された凹部の底面Ｂまでの厚み帯が、第１の絶縁層２である。一方、エンボス加工された片面Ｓからエンボス加工により形成された凹部の底面Ｂまでの厚み帯が、第２の絶縁層３である。第２の絶縁層３は、凹部の空隙の層を含んでいる。 The insulating film IF has an uneven surface on one side S by embossing. The unevenness is formed by partially crushing the insulating film IF on one surface S of the insulating film IF to a depth that does not reach the opposite surface R from the one surface S, and is formed by embossing from the non-embossed opposite surface R. The thickness band up to the bottom surface B of the recessed portion is the first insulating layer 2. On the other hand, the thickness band from the embossed one side S to the bottom surface B of the recess formed by embossing is the second insulating layer 3. The second insulating layer 3 includes a cavity layer of a recess.
　凹部の空隙に、巻線が収容された容器６に充填された自然由来のガス５が入り込むことにより、第２の絶縁層３は成る。第１の絶縁層２の比誘電率ε１と第２の絶縁層３の比誘電率ε２との関係は、絶縁ガス５の比誘電率をεｇとすると、次式（２）を満たす関係とし、第２の絶縁層３の比誘電率ε２は、第１の絶縁層２の比誘電率ε１よりも低くする。
　　εｇ＝ε２＜ε１　　　　　　　　　　　・・・（２） The second insulating layer 3 is formed by the natural gas 5 filled in the container 6 in which the winding is accommodated entering the gap of the recess. The relationship between the relative dielectric constant epsilon 2 of the first dielectric constant epsilon 1 of the insulating layer 2 and the second insulating layer 3, when the relative dielectric constant of the insulating gas 5 and epsilon g, satisfies the following formula (2) In relation, the relative dielectric constant ε 2 of the second insulating layer 3 is set lower than the relative dielectric constant ε 1 of the first insulating layer 2.
ε g = ε 2 <ε 1 (2)
　（２－２．作用）
　第２の実施形態のガス絶縁静止誘導電器の作用について、説明する。第２の実施形態では、エンボス加工による凹部が絶縁フィルムＩＦに形成されて、自然由来のガス５が入り込んだ空隙の層を含む第２の絶縁層３となって電位を下げつつ、この第２の絶縁層３で電子が絶縁破壊に至るまで加速する前に隣の絶縁フィルムの残部である第１の絶縁層２が、電子の加速を阻害する。エンボス加工によって形成される第１の絶縁層２と第２の絶縁層３とが交互に積層されることにより、この電位の低下と電子の加速阻害が交互に繰り返される。 (2-2. Action)
The operation of the gas-insulated static induction apparatus according to the second embodiment will be described. In the second embodiment, a concave portion formed by embossing is formed in the insulating film IF, and the second insulating layer 3 including a void layer into which a naturally derived gas 5 has entered becomes a second insulating layer 3 while lowering the potential. Before the electrons are accelerated until dielectric breakdown occurs in the insulating layer 3, the first insulating layer 2 which is the remaining part of the adjacent insulating film inhibits the acceleration of the electrons. By alternately laminating the first insulating layer 2 and the second insulating layer 3 formed by embossing, this potential decrease and electron acceleration inhibition are repeated alternately.
　（２－３．効果）
　第２の実施形態のガス絶縁静止誘導電器は、リード導体１に巻回される絶縁フィルムＩＦを備える。絶縁フィルムＩＦは、片面Ｓに、その片面Ｓから反対面Ｒまでは至らない程度の深さの凹部が形成される。第１の絶縁層２は、反対面Ｒから凹部の底面Ｂまでの厚み帯により成る。第２の絶縁層３は、片面Ｓから凹部の底面Ｂまでの厚み帯である。第２の絶縁層３は、凹部の空隙を含んでいる。 (2-3. Effect)
The gas-insulated static induction apparatus according to the second embodiment includes an insulating film IF wound around the lead conductor 1. Insulating film IF is formed with a recess having a depth that does not reach from one surface S to opposite surface R on one surface S. The first insulating layer 2 is formed of a thickness band from the opposite surface R to the bottom surface B of the recess. The second insulating layer 3 is a thickness band from one side S to the bottom surface B of the recess. The second insulating layer 3 includes a concave space.
　これにより、エンボス加工により絶縁フィルムＩＦに形成された凹部の空隙の層に自然由来のガス５を入り込ませて、リード導体１の半径方向に第２の絶縁層３の層を形成することができるので、１枚の絶縁フィルムＩＦで、第１の絶縁層２と第２の絶縁層３とを形成することできる。エンボス加工を施した絶縁フィルムＩＦを積層する場合は、単一の絶縁フィルムＩＦを積層することによって実現することができるため、第１の絶縁層２と第２の絶縁層３とをそれぞれ交互に積層する場合と比べ、積層回数を減少させることができ、ガス絶縁静止誘導電器を従来よりも少ない工数で製造できるので、ガス絶縁静止誘導電器の製造コストを削減できる。 As a result, the gas 5 derived from nature can enter the void layer of the recess formed in the insulating film IF by embossing, and the second insulating layer 3 can be formed in the radial direction of the lead conductor 1. Therefore, the 1st insulating layer 2 and the 2nd insulating layer 3 can be formed with one insulating film IF. When laminating the insulating film IF subjected to embossing can be realized by laminating a single insulating film IF, the first insulating layer 2 and the second insulating layer 3 are alternately arranged. Compared to the case of stacking, the number of stacking can be reduced, and the gas-insulated static induction device can be manufactured with fewer man-hours than before, so that the manufacturing cost of the gas-insulated static induction device can be reduced.
　なお、エンボス加工は、上述したように、絶縁フィルムＩＦを部分的に押し潰す押圧処理によって絶縁フィルムＩＦの表面に凹凸が施されたものをいい、第２の実施形態では、エンボス加工の他に絶縁フィルムＩＦの表面に物理的に凹凸が施されたものであってもよい。例えば、物理的に凹凸を施す方法として、レーザによって絶縁フィルムＩＦの表面を加工して凹凸を施してもよく、または、絶縁フィルムＩＦの金型やエッチング処理により表面に凹凸を施すようにしてもよい。 In addition, as mentioned above, embossing means what the unevenness | corrugation was given to the surface of insulating film IF by the press process which partially crushes insulating film IF. In 2nd Embodiment, in addition to embossing The surface of the insulating film IF may be physically uneven. For example, as a method of physically providing unevenness, the surface of the insulating film IF may be processed by a laser to provide unevenness, or the surface may be provided with a mold or etching treatment of the insulating film IF. Good.
　［第３の実施形態］
　（３－１．構成）
　図３は、第３の実施形態に係るガス絶縁静止誘導電器におけるリード線に積層されたエンボス加工により成る複数層の概略構成を示す断面図である。図３に示すように、複数層からなる絶縁層の最外層は、第１の絶縁層２となるように構成されている。絶縁層のうちの最外層以外は、エンボス加工が施されて成り、第１の絶縁層２と第２の絶縁層３の複数層を構成する。例えば、絶縁層は、エンボス加工が施された面Ｓを相互に向かい合わせた状態でリード導体１に巻きつけることにより、第１の絶縁層２と第２の絶縁層３との複数層を構成し、最外層は、比誘電率の高い第１の絶縁層２となっている。なお、図２（ｂ）に示したように、エンボス加工が施された面Ｓを全てリード導体１側に向けて巻きつけることにより、第１の絶縁層２と第２の絶縁層３の複数層を構成し、最外層は、比誘電率の高い第１の絶縁層２としてもよい。 [Third Embodiment]
(3-1. Configuration)
FIG. 3 is a cross-sectional view showing a schematic configuration of a plurality of layers formed by embossing laminated on a lead wire in a gas-insulated static induction device according to a third embodiment. As shown in FIG. 3, the outermost layer of the insulating layer composed of a plurality of layers is configured to be the first insulating layer 2. The insulating layer other than the outermost layer is embossed to form a plurality of layers of the first insulating layer 2 and the second insulating layer 3. For example, the insulating layer is composed of a plurality of layers of the first insulating layer 2 and the second insulating layer 3 by wrapping the lead conductor 1 with the embossed surfaces S facing each other. The outermost layer is the first insulating layer 2 having a high relative dielectric constant. Note that, as shown in FIG. 2B, a plurality of the first insulating layer 2 and the second insulating layer 3 can be obtained by winding all the embossed surfaces S toward the lead conductor 1 side. The outermost layer may be the first insulating layer 2 having a high relative dielectric constant.
　（３－２．効果）
　第３の実施形態のガス絶縁静止誘導電器は、第１の実施形態又は第２の実施形態の構成において、複数層からなる絶縁層のうち最外層の表面Ｒは平滑になっている。この最外層の表面Ｒは、エンボス加工が施されていない面が絶縁ガス５と接するようになっている。この最外層の表面Ｒは、絶縁ガス５と接している面の表面の粗さも絶縁性能を決める要素となり得る。そのため、絶縁層のうち最外層の表面Ｒは平滑であることにより、より一層絶縁性能を向上させることができる。 (3-2. Effect)
In the gas-insulated static induction device of the third embodiment, in the configuration of the first embodiment or the second embodiment, the surface R of the outermost layer of the plurality of insulating layers is smooth. The surface R of the outermost layer is in contact with the insulating gas 5 on the surface that has not been embossed. The surface R of the outermost layer can also be a factor that determines the insulating performance by the roughness of the surface in contact with the insulating gas 5. Therefore, the insulating performance can be further improved by the smoothness of the outermost surface R of the insulating layer.
　また、絶縁層のうちの最外層は、比誘電率の高い第１の絶縁層２とするようにしてもよい。この最外層は、比誘電率の高い第１の絶縁層２とすることにより、最外層の表面Ｒで電子の加速を阻止することができる。 Further, the outermost layer of the insulating layers may be the first insulating layer 2 having a high relative dielectric constant. By making the outermost layer the first insulating layer 2 having a high relative dielectric constant, it is possible to prevent acceleration of electrons on the surface R of the outermost layer.
　［第３の実施形態の変形例］
　第１の実施形態、第２の実施形態及び第３の実施形態において、複数層のうち最外層に比誘電率の高い第１の絶縁層２を用いた場合、第１の絶縁層２の材質として、不燃性又は難燃性の材質を用いることが好ましい。絶縁ガスとして、例えば、空気、窒素、酸素、二酸化炭素又はこれら２種以上を主成分とする自然由来のガス５を用いた場合、酸素を含むガスには助燃性がある。このため、最外層には、例えば、リード線１００の表面Ｒから、内部に酸素を透過させない不燃性又は難燃性の材質を用いることにより、リード導体１が放電した場合でも、比誘電率の高い第１の絶縁層２が酸素を遮断することができるので、リード導体１が放電した場合でも火災を防止することができる。特に、最外層の材質として、ＰＥＴフィルムやＰＥＮフィルムを用いることが望ましい。 [Modification of Third Embodiment]
In the first embodiment, the second embodiment, and the third embodiment, when the first insulating layer 2 having a high relative dielectric constant is used as the outermost layer among the plurality of layers, the material of the first insulating layer 2 It is preferable to use a nonflammable or flame retardant material. As the insulating gas, for example, when the naturally derived gas 5 mainly composed of air, nitrogen, oxygen, carbon dioxide, or two or more of these is used, the gas containing oxygen has an auxiliary property. For this reason, even when the lead conductor 1 is discharged by using a nonflammable or flame retardant material that does not allow oxygen to permeate from the surface R of the lead wire 100 to the outermost layer, for example, the relative permittivity of Since the high first insulating layer 2 can block oxygen, a fire can be prevented even when the lead conductor 1 is discharged. In particular, it is desirable to use a PET film or a PEN film as the material of the outermost layer.
　［他の実施形態］
　以上、本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で種々の省略、置き換え、変更を行なうことができる。これらの実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。 [Other Embodiments]
Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.
１…リード導体
２…第１の絶縁層
３…第２の絶縁層
５…自然由来のガス
６…容器 DESCRIPTION OF SYMBOLS 1 ... Lead conductor 2 ... 1st insulating layer 3 ... 2nd insulating layer 5 ... Natural origin gas 6 ... Container

Claims (10)

  1. 　自然由来のガスが充填された容器に収容された導体と、
    　前記導体を被覆する第１の絶縁層と、
    　前記導体を被覆し、前記第１の絶縁層よりも比誘電率の低い第２の絶縁層と、
    　を備え、
    　前記第１の絶縁層と前記第２の絶縁層は、
    　前記導体の半径方向外側に向かって交互に積層されて設置されるとともに、前記導体の全周囲に亘って連続的に延びて囲っていること、
    　を特徴とするガス絶縁静止誘導電器。     A conductor housed in a container filled with natural gas,
    A first insulating layer covering the conductor;
    A second insulating layer covering the conductor and having a relative dielectric constant lower than that of the first insulating layer;
    With
    The first insulating layer and the second insulating layer are:
    The layers are alternately stacked toward the outside in the radial direction of the conductor, and continuously extend and surround the entire circumference of the conductor.
    A gas-insulated static induction appliance characterized by
  2. 　前記自然由来のガスは、
    　空気、窒素、酸素、二酸化炭素又はこれらの２種以上を主成分とするガスであること、
    　を特徴とする請求項１に記載のガス絶縁静止誘導電器。     The natural gas is
    Air, nitrogen, oxygen, carbon dioxide or a gas mainly composed of two or more of these,
    The gas-insulated static induction device according to claim 1.
  3. 　前記第１の絶縁層と前記第２の絶縁層は、それぞれ絶縁フィルムにより成り、
    　前記第２の絶縁層の絶縁フィルムの材質は、
    　前記第１の絶縁層の比誘電率よりも比誘電率が低い材質であることを、
    　特徴とする請求項１または２に記載のガス絶縁静止誘導電器。     The first insulating layer and the second insulating layer are each made of an insulating film,
    The material of the insulating film of the second insulating layer is
    A material having a relative dielectric constant lower than that of the first insulating layer;
    The gas-insulated static induction device according to claim 1 or 2, characterized by the above.
  4. 　前記第２の絶縁層の厚さは、
    　前記第１の絶縁層の厚さの少なくとも等倍以上とすること、
    　を特徴とする請求項１乃至３のいずれか１項に記載のガス絶縁静止誘導電器。     The thickness of the second insulating layer is
    The thickness of the first insulating layer is at least equal to or greater than the thickness;
    The gas-insulated static induction device according to any one of claims 1 to 3.
  5. 　前記第２の絶縁層の厚さは、
    　前記第１の絶縁層の厚さの１０倍以下であって、１０ｍｍ以下であること、
    　を特徴とする請求項４に記載のガス絶縁静止誘導電器。     The thickness of the second insulating layer is
    Not more than 10 times the thickness of the first insulating layer and not more than 10 mm;
    The gas-insulated static induction machine according to claim 4, wherein
  6. 　前記導体に巻回される絶縁フィルムを備え、
    　前記絶縁フィルムは、
    　片面に、その片面から反対面までは至らない程度の深さの凹部が形成されて成り、
    　前記第１の絶縁層は、
    　前記反対面から前記凹部の底面までの前記絶縁フィルムの厚み帯であり、
    　前記第２の絶縁層は、
    　前記片面から前記凹部の底面までの空隙を含む前記絶縁フィルムの厚み帯であること、
    　を特徴とする請求項１乃至５のいずれか１項に記載のガス絶縁静止誘導電器。     Comprising an insulating film wound around the conductor;
    The insulating film is
    On one side, a recess with a depth that does not reach from the one side to the opposite side is formed,
    The first insulating layer includes
    The thickness band of the insulating film from the opposite surface to the bottom surface of the recess,
    The second insulating layer is
    It is a thickness band of the insulating film including a gap from the one side to the bottom surface of the recess,
    The gas-insulated static induction device according to any one of claims 1 to 5, wherein
  7. 　前記第１の絶縁層と前記第２の絶縁層とが交互に積層されて成る複数層のうち最外層の表面は、平滑であること、
    　を特徴とする請求項１乃至６のいずれか１項に記載のガス絶縁静止誘導電器。     The outermost surface of the plurality of layers formed by alternately laminating the first insulating layer and the second insulating layer is smooth;
    The gas-insulated static induction device according to any one of claims 1 to 6.
  8. 　前記最外層は、前記第１の絶縁層であること、
    　を特徴とする請求項７に記載のガス絶縁静止誘導電器。     The outermost layer is the first insulating layer;
    The gas-insulated static induction device according to claim 7.
  9. 　前記第１の絶縁層は、
    　表面から内部に酸素を透過させない不燃性または難燃性の材質であること、
    　を特徴とする請求項８に記載のガス絶縁静止誘導電器。     The first insulating layer includes
    It is a nonflammable or flame retardant material that does not allow oxygen to penetrate from the surface to the inside.
    The gas-insulated static induction device according to claim 8.
  10. 　ガス絶縁変圧器又はガス絶縁リアクトルであること、
    　を特徴とする請求項１乃至９のいずれか１項に記載のガス絶縁静止誘導電器。     Be a gas insulated transformer or a gas insulated reactor,
    The gas-insulated static induction device according to any one of claims 1 to 9, wherein:
PCT/JP2016/087097 2016-12-13 2016-12-13 Gas-insulated static induction electrical apparatus WO2018109843A1 (en)

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Application Number Priority Date Filing Date Title
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5434095A (en) * 1977-08-22 1979-03-13 Toshiba Corp Multiple layer insulated lead for high tension device
JP2003501780A (en) * 1999-06-02 2003-01-14 タイコ・エレクトロニクス・コーポレイション Insulated electrical conductor
JP2003142318A (en) * 2001-11-01 2003-05-16 Hitachi Ltd Gas-insulated transformer
WO2013094488A1 (en) * 2011-12-20 2013-06-27 三菱電機株式会社 Lead wire for static induction device, insulating structure for lead wire, transformer having same, and method for insulating lead wire
JP2015018912A (en) * 2013-07-10 2015-01-29 株式会社東芝 Gas insulation transformer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5434095A (en) * 1977-08-22 1979-03-13 Toshiba Corp Multiple layer insulated lead for high tension device
JP2003501780A (en) * 1999-06-02 2003-01-14 タイコ・エレクトロニクス・コーポレイション Insulated electrical conductor
JP2003142318A (en) * 2001-11-01 2003-05-16 Hitachi Ltd Gas-insulated transformer
WO2013094488A1 (en) * 2011-12-20 2013-06-27 三菱電機株式会社 Lead wire for static induction device, insulating structure for lead wire, transformer having same, and method for insulating lead wire
JP2015018912A (en) * 2013-07-10 2015-01-29 株式会社東芝 Gas insulation transformer

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