Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
  • H01H33/02—Details
  • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
  • H01H33/22—Selection of fluids for arc-extinguishing
• • 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
  • H01B3/56—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances gases
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
  • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
  • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
  • H02B13/035—Gas-insulated switchgear
  • H02B13/0354—Gas-insulated switchgear comprising a vacuum switch
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
  • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
  • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
  • H02B13/035—Gas-insulated switchgear
  • H02B13/055—Features relating to the gas
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
  • H01H33/02—Details
  • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
  • H01H33/56—Gas reservoirs
  • H01H2033/566—Avoiding the use of SF6

Definitions

• the invention relates to an insulation medium for an electric power transmission device, such as for a high-voltage switch or a fluid-insulated pipe conductor, wherein the insulation medium at room temperature and atmospheric pressure is a fluid.
• the invention further relates to an electric power transmission device having such Isolati onsmedium.
• Electric power transmission devices such as high-voltage circuit breaker or circuit breaker, are widely known in the art. They serve to separate high currents.
• contact elements are usually provided, which can be brought into contact to allow an electrical connection, and which can be separated in order to be able to separate an electrical connection or an electric current.
• the contact elements in an isolation medium.
• This may for example be configured in gaseous form and an insulation space ausyogl len, in which the contact elements are arranged.
• DE 44 305 79 B4 relates to a high-voltage switch with a main switching contact and an auxiliary switching device bridging the main switching contact shortly before reaching its on state with the interposition of a switch-on during switch-on and their contact separation occurs when switching off before the contact separation of the main switch contact the Movement of the auxiliary switching device is slowed down at least during the turn-off by a fluid which is moved in a direction connected to a first contact piece of the auxiliary switching device first piston / cylinder assembly.
• the insulating medium described in this document sulfur hexafluoride.
• the solution of the problem is inventively by an iso lationsmedium for an electric power transmission device with the features of claim 1.
• the solution of the task he follows according to the invention further by using a Iso lationsmediums as arc extinguishing medium in a high-voltage switch or as an insulating atmosphere in a pipe conductor according to claim 6.
• the object is also achieved by an electric power transmission device having the features of claim 7.
• Preferred embodiments of the invention are described in the subclaims, in the description or the figures, wherein further in the subclaims or in the description or in The features described or shown in the figures may represent an object of the invention individually or in any combination whatsoever if the contrary does not clearly result from the context.
• the insulation medium is a fluid at room temperature and atmospheric pressure, and wherein the isolation medium has at least the following constituents:
• An exemplary mixing ratio for a mixture of synthetic air and fluorine compound or fluorine compounds is 95 vol.% Synthetic air and 5 vol .-% of organic fluorine compound, in particular Fluorni trilene.
• a prescribed isolation medium allows a safe reduction or extinction of an arc in a high voltage switch and allows a long-term stable operation of the high voltage switch and is also suitable as insu-saving atmosphere in a fluid-insulated pipe conductor FITS advantageous.
• the insulation medium described here is used in particular for use in an electric power transmission device.
• a high-voltage switch or a fluid-insulated pipe conductor can be used.
• Under a high voltage switch can in the sense of vorlie ing invention in particular a switching device understood who the having an electrical conductor, which can be opened or closed by appropriate contact elements who can and thus allow or interrupt a current flow.
• the high-voltage switch may be suitable for carrying high currents or the application of a high voltage, arcs may occur in a separation.
• Exemplary currents that can be separated by a circuit breaker of a high voltage switch may be in a range of up to 80,000A. Furthermore, you can the switching device voltages in a range of up to
• a conductor under a fluid-insulated pipe conductor in particular a conductor can be understood in the usual operating voltages of about 500 kV with nominal currents per conductor can be up to about 5 kA.
• the conductor may be present in an outer tube, wherein in the outer tube and the conductor surrounding an insulating atmosphere is present and wherein the mechanical support of the conductor support insulators may be present.
• the insulation medium should thus serve to erase NEN occurring in the high-voltage switch arc, which may occur especially in the separation of contact elements, to delete or to ensure sufficient insulation in the pipe.
• this at room temperature and atmospheric pressure such as in a range of atmospheric pressure to 10 bar (absolute) is a fluid, for example, is gaseous.
• room temperature is also understood to mean a temperature of 22 ° C.
• atmospheric pressure is understood to mean a pressure of 1 bar and basically stated pressures are to be understood as absolute values.
• the insulating medium is also a gaseous medium under operating conditions, for example at an elevated pressure and / or elevated or reduced temperature, as described below.
• the Isolationsmedi is introduced into an insulation space of the high voltage switch is and remains there.
• the insulating medium can completely surround contact elements, between which an arc can occur during disconnection, or also an NEN ladder in a pipe.
• the emergence of an arc counteracted or a deletion of the arc can be effectively supported be relationship as effective insulation of the conductor be acts.
• the amount of insulation medium in the insulation space can be easily adjusted and thus the insulating capacity can be tailored to the desired application area.
• synthetic air at a level of from> 50% by volume to about 98% by volume, from about> 85% by volume to about 98% by volume; and an organic fluorine compound in a content of> 2 vol.% to ⁇ 50 vol.%, for example from> 2 vol.% to ⁇ 15 vol.%.
• the isolation medium may consist of the abovementioned constituents in the abovementioned proportions, in which case any impurities or impurities in the substances must be taken into account.
• this embodiment of the insulating medium it may be possible that an effective extinguishing an arc is made possible and also a long-term stable operation even with multiple switching operations of the high voltage switch is enabled, or that an effective ve insulation of a conductor in an outer wall of a pipe conductor is made possible.
• soot can affect the insulation capacity.
• This advantageous effect can be explained by the presence of oxygen, which "catches" the precipitation of soot, for example by the formation of CO or CO 2.
• the latter can be further increased by the fact that the insulating medium itself is not zer sets in an arc, but remains stable. Also, the occurrence of sooty compounds can be reduced. Furthermore, the insulating force of the insulating medium can be maintained, which can further improve the long-term stable operation.
• isolation media comprising synthetic air and one or more fluoroorganic components in the amounts described above may allow for improved long-term sealing of switching devices or even in pipelines. This may in particular be due to the fact that based on common polymers, which are usually used as sealing materials, the Iso lationsmedium has a relatively low permeation rate. In particular, oxygen and nitrogen have a low permeation rate due to common polymers.
• suitable sealing materials include EPDM (ethylene-propylene-diene rubber), NBR (nitrile-butadiene rubber), CR (chloroprene rubber), IIR (isobutene-isoprene rubber), SBR (styrene-butadiene rubber) ) or FKM (fluoropolymer rubber).
• EPDM ethylene-propylene-diene rubber
• NBR nitrile-butadiene rubber
• CR chloroprene rubber
• IIR isobutene-isoprene rubber
• SBR styrene
• the dielectric Fes activity of the insulating medium is improved.
• the effectiveness of the extinction of an arc relationship, the effectiveness of an insulation can be particularly high, especially compared to pure synthetic air.
• synthetic air may also be particularly preferred since it is simple and inexpensive to manufacture bar, such as in the surrounding the high voltage switch air is freed using suitable filters, water separators and the like of the unwanted components. This can be of great advantage, for example, in the construction, commissioning and maintenance of the electric power transmission device.
• synthetic air can easily be produced by mixing nitrogen and oxygen in suitable purity and mixing ratio.
• the advantages described above can be particularly effective with respect to the solutions of the prior art.
• the synthetic air which can also be referred to as "clean air”
• cleaning air has the following constituents:
• the synthetic air consists of the above-described constituents, that is to say comprises no further constituents.
• the synthetic air may consist of 79.5% by volume of oxygen and 20.5% by volume of nitrogen, impurities of preferably ⁇ 1% by volume, for example ⁇ 5 ppm by volume, being possible.
• the at least one organofluorine compound may be selected from the group consisting of fluoronitriles, such as perfluoronitriles, fluorinated ethers, such as hydrofluoromonoethers, fluoroolefins, such as hydrofluoroolefins, and fluoroketones, such as perfluoroketones.
• fluoronitriles such as perfluoronitriles
• fluorinated ethers such as hydrofluoromonoethers
• fluoroolefins such as hydrofluoroolefins
• fluoroketones such as perfluoroketones.
• Preferred fluoroorganic compounds may comprise hydrofluoro monoethers having at least three carbon atoms, fluoroketones having a number from four to twelve carbon atoms, for example five or six carbon atoms.
• the fluoro-organic compound may be a perfluoroalkyl nitrile such as a compound selected from perfluoroacetonitrile, perfluoropropionitrile (C 2 F 5 CN), perfluorobutyronitrile (C 3 F 7 CN), perfluoroisobutyronitrile
• the isolation medium is substantially free of at least one of water, carbon dioxide and sulfur hexafluoride.
• the isolation medium may be substantially free of water, carbon dioxide and sulfur hexafluoride.
• essentially free is intended to mean, in particular, that the abovementioned substances in the insulation medium in a fraction of ⁇ 1% by volume, for example of ⁇ 10 ppm by volume, of approximately ⁇ 5 ppm by volume.
• the long-term stability of a switching unit be particularly high and can also be an effective electrical isolation allows.
• the isolation medium consists of synthetic air and at least one fluoro-organic compound.
• synthetic air ie oxygen and nitrogen, and at least one organofluorine compound.
• organofluorine compound essentially no further substances are present in the isolation medium.
• further substances should only be present in a proportion of ⁇ 1% by volume, for example of ⁇ 10 ppm by volume, for example from ⁇
• the insulating medium has further constituents, such as nitrogen oxides or carbon dioxide.
• the present invention further relates to the use of an insulating medium, as described in detail above, as an arc extinguishing medium in a high voltage. circuit breaker or as an electrically insulating atmosphere in a fluid-insulated pipe conductor.
• an effective extinction of an arc can be combined with a long-term stable operation of the high-voltage switch. Furthermore, a particularly good insulation quality of the insulating atmosphere can be made possible.
• the present invention further relates to a fluid-insulated electric power transmission device having a id-sealed insulating space, wherein in the Isolati onsraum or in a connectable with the insulation Re reservoir an insulation medium is arranged, characterized in that the insulation medium is configured, as described above in detail is described.
• Under an electric power transmission device can basically be understood to mean any device in which energy, in particular in the form of electricity, can be transmitted.
• the electrical power transmission device may have at least one of a high-voltage switch and a fluid-insulated pipe conductor.
• a high-voltage switch or a river idisolierter pipe conductors are designed in particular, as described above in detail. Accordingly, it may be advantageous that in a pipe conductor high insulation quality of a arranged in an outer wall and surrounded by an insulating atmosphere conductor allows.
• the space surrounding the conductor and surrounded by an outer wall space of the pipe is the iso lationsraum in which in a pipe conductor preferably permanently the insulation medium is included.
• the high-voltage switch comprises an insulation space, also referred to as a fluid receiving space.
• a first switching unit is arranged, which may be formed in particular special than earthing switch or as a disconnector or as a grounding switch and disconnector. When a separation of contact elements of the first switching unit, an arc may arise, thus the first
• Switching unit is caused and should also be deleted te.
• an insulation medium is provided in the insulation space itself, ie preferably permanently and independently of switching operations taking place, or else in a reservoir which can be connected to the insulation space, for instance when the switching operation is imminent.
• the insulation medium can by its properties, the arc fundamentally, but particularly advantageous terdesign in a tuned scarf terdesign, such as arrangement of the switching unit, VELOCITY of the movable contacts, etc., delete, and thus ensure a si-safe operation of the high voltage switch.
• a high-voltage switch that in the isolation space Lich additional to the first switching unit, a second switching unit and optionally a third switching unit are arranged, wherein the first switching unit and the third switching unit each have at least one of a circuit breaker and a grounding switch , and wherein the second switching unit comprises a circuit breaker, in particular a vacuum scarf ter.
• a He circuit breaker, a circuit breaker and a circuit breaker, in particular a vacuum switch provided, wherein the He circuit breaker and the circuit breaker can be separated from each other or can be formed as a unitary switching unit.
• the circuit breaker in particular a vacuum switch, is thereby triggered independently of disconnectors and earthing switches, such as when faults occur, such as short circuits in the power grid and high short-circuit currents must be interrupted.
• Isolation and earthing switch represent in particular safety-relevant switching devices and are relatively rare ner triggered, such as when maintenance is to be performed or a change between busbars takes place.
• a circuit of a disconnector and earthing switch is usually preceded by a circuit of the circuit breaker.
• a circuit breaker and a grounding switch which are preferably both surrounded by the insulation medium.
• a vacuum switch hen vorgese, wherein the contact elements of the vacuum switch are not in contact with the insulating medium, but in a Vakuu matmosphere.
• the isolation space for example, by fluid-tight, gas-permeable, or fluid-permeable, gas-permeable, from separations, is separated into a plurality of areas, the individual areas of the insulation space all or only partially, but in particular the surrounding area of the first switching unit of the insulation space and optionally the third switching unit surrounding area of the insulation space, is filled with the insulating medium.
• the circuit breaker may in particular be a vacuum circuit breaker and serve to interrupt high currents, in particular short-circuit currents, whereas the
• Isolation switch and the earthing switch for interrupting small currents can serve the Isolati onsmedium as an arc extinguishing medium for disconnector and earthing switch serves.
• the circuit breaker such as the vacuum switch, can disconnect currents in a range of 25,000 A to 80,000 A, or can be applied to this voltage in a range of 72,500 V to 800,000 V.
• a circuit breaker may further separate currents in a range of 0.1 A to 8000 A, or voltages of a range of 10 V to 1000 V may be applied thereto.
• a grounding switch can continue to separate currents in a range of 0.4 A to 500 A or at this voltages may be in a range of 500V to 70,000V.
• the long-term stability can be further improved by using the insulating medium described above, especially in earthing switches or circuit breakers who the, since the formation of soot-containing decomposition products can be prevented in about grounding switches or circuit breakers.
• the use of the above-described insulating medium in combination with a vacuum switch as the preferred circuit breaker can be an optimal solution for switching devices with a long service life, which is especially true for high voltage applications.
• a pressure in a range of 10 10 bar to 10 6 bar is present.
• the insulation medium may be present in the insulation space at a pressure in a range from greater than or equal to 4 bar (absolute) to less than or equal to 10 bar (absolute).
• Fig. 1 shows schematically an embodiment of a high voltage switch as an electric power transmission device according to the present invention.
• FIG. 1 shows a schematic example of an embodiment of an electric power transmission device in the form of a high-voltage switch 10 according to the invention.
• the high voltage switch 10 comprises a gas-tight To closed isolation space 12, in which an isolation medium 13 is seconded, as described in detail below.
• first switching units 16 are arranged in the isolation space 12.
• second Anord tion 18 of the first switching units 16 is arranged in the isolation space 12.
• the first switching unit 16 is designed as a combined earthing scarf ter and disconnector.
• the first assembly 14 and the second assembly 18 each carry switch units 16 with earthing and disconnecting switches.
• a second Wegein unit 20 is arranged.
• the second switching unit 20 comprises a circuit breaker and is preferably designed as a vacuum switch.
• the vacuum switch has a switch room with a separable contact, wherein in the switch room an exemplary pressure of less than or equal to 10 6 bar exists.
• the insulation space 12 is separated into a plurality of regions 15 by gas-tight or gas-permeable separations 11, with all regions 15 of the insulation space 12 being filled with the insulation medium 13 in this embodiment.
• the first switching unit 16 is merely a circuit breaker He and accordingly a third switching unit would be provided, which includes the circuit breaker.
• the third switching unit could then be part of the first arrangement 14 and the second arrangement 18, or further arrangements, not shown.
• control cabinet 22 by means of which the Hochspanungsschalter 10 can be controlled and sitting on egg ner console 24.
• FIG. 1 also shows a feeder module 32 with further disconnectors and earthing switches and a cable end closure 34.
• the isolation space 12 or the isolation medium 13 arranged therein is present with an overpressure, wherein the overpressure may be present, for example, in a range from greater than or equal to 4 bar to less than or equal to 10 bar.
• the entire insulation space 12 is gas-tight even with a corresponding pressure.
• isolation medium 13 is configured by having the following components:
• an organic fluorine compound in a content of> 2 vol .-% to ⁇ 50 vol .-%, wherein the fluorine compound example, fluoronitriles, such as perfluoronitriles, fluoro ethers, such as hydrofluoro-monoether, fluoroolefins, such as hydro- fluoroolefins, and fluoroketones, such as perfluoroketones.
• fluoronitriles such as perfluoronitriles
• fluoro ethers such as hydrofluoro-monoether
• fluoroolefins such as hydro- fluoroolefins
• fluoroketones such as perfluoroketones.
• the insulating medium 13 may be made of synthetic air and the at least one fluoroorganic compound may be so that the insulating medium 13 is substantially free of at least one of water, carbon dioxide and sulfur xafluoride.
• the synthetic air has the following constituents:

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• 2017
  • 2017-11-17 DE DE102017220570.9A patent/DE102017220570A1/de active Pending
• 2018
  • 2018-10-31 KR KR1020207017068A patent/KR102458208B1/ko active IP Right Grant
  • 2018-10-31 EP EP18800544.1A patent/EP3685416A1/de not_active Withdrawn
  • 2018-10-31 WO PCT/EP2018/079778 patent/WO2019096581A1/de unknown
  • 2018-10-31 US US16/764,931 patent/US11094484B2/en active Active
  • 2018-10-31 CN CN201880074241.7A patent/CN111357073B/zh active Active

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