Classifications

• • 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
  • H01F27/288—Shielding
  • H01F27/2885—Shielding with shields or electrodes
• • 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
  • 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
• • 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

Definitions

• the invention relates to an arrangement and a method for potential reduction in high voltage technology, with at least one fitting body, electrically insulating film and electrically conductive areas, the electrically conductive areas being arranged between layers of the electrically insulating film, and at least parts of the electrically insulating film are arranged around the at least one fitting body.
• high-voltage parts of outdoor systems are electrically isolated from earth potential by porcelain and / or composite insulators.
• the potential between high voltage and earth potential is controlled as homogeneously as possible, d. H. a uniform potential distribution along the insulator is generated.
• the control takes place at small voltage levels with a control electrode, with higher voltage levels also requiring a larger insulator diameter and / or larger designs, combined with significantly higher material usage.
• AC applications i. H. AC applications
• DC applications d. H. DC voltage applications, especially in the high voltage range of up to 550 kV and / or up to 1200 kV.
• the resulting resistive potential distribution is decisive.
• a control which takes place via a few electrodes that are mechanically coupled to one another by insulating pieces.
• This electrode arrangement enables coarse control.
• a potential control via a RIP ie Resin-Impregnated-Paper control.
• a large number of aluminum coverings, which are separated from each other by layers of paper, are cylindrically wound onto a winding former and impregnated with casting resin, so that a solid resin cylinder is created.
• the potential distribution in DC applications is determined by the resistive current that occurs in the steady state.
• the potential distribution is determined by the capacitive distribution. With the same arrangement, this can result in different potential distributions and field stresses under AC and DC stresses.
• the object of the present invention is to provide an arrangement and a method for potential cutoff in high-voltage technology which are suitable for AC and DC applications.
• it is the task of specifying an arrangement for potential control which is suitable for AC applications and which is equally suitable for DC applications.
• An arrangement for potential control in high-voltage technology with the features according to claim 1 and / or by a method for potential control in high-voltage technology, in particular using the arrangement described above, according to claim 13.
• Advantageous embodiments of the arrangement according to the invention for potential control in high voltage technology and / or the method for potential control in high voltage technology, in particular using the arrangement described above, are specified in the subclaims.
• Objects of the main claims are mutually combinable and with features of subclaims and features of the subclaims.
• An arrangement according to the invention for potential reduction in high-voltage technology comprises at least one fitting body, electrically insulating film and electrically conductive areas, the electrically conductive areas being arranged between layers of the electrically insulating film. At least parts of the electrically insulating film are arranged around the at least one fitting body.
• the arrangement is designed for direct current applications.
• the electrically conductive areas between layers of the electrically insulating film can be designed as potential control pads.
• At least one fitting body can be designed as a first potential control covering. By using the fitting body as the first potential control covering, a control covering can be saved and the manufacture of the arrangement can be simplified. Egg ne contacting the fitting body is simple, stable and inexpensive z. B. possible via an eyelet.
• the arrangement can be rotationally symmetrical, in particular circularly cylindrical, with the at least one barrel, in particular in the manner of a winding tube, arranged at a first end inside, and with a cylin-shaped jacket tube, in particular a slotted tube, at a second end Arranged outside. Wrapping the electrically insulating film with electrically conductive Areas between layers of the electrically insulating film is easily possible with rotationally symmetrical arrangements without z. B. breaks at edges and / or corners.
• the electrically insulating film can be at least partially wrapped around the at least one fitting body, with electrically conductive regions which are electrically insulated from one another via the film, at least one electrical contact being made to an electrically conductive region via an opening in a particularly outer layer of the film can.
• the at least one electrical contact can be formed by an electrically conductive film strip, in particular an aluminum film strip, which is passed through the opening.
• an electrically conductive film strip in particular an aluminum film strip, which is passed through the opening.
• This enables simple, stable and inexpensive electrical contacting without the risk of contact breaking due to bending.
• the contact is made over the outer edge of a film layer, the contact being kinked at the edge. This can lead to breaks in the contact, in particular due to the small thickness of the foils.
• electrical contacts to an electrically conductive area can be formed via openings in the outer layer of the film, in particular arranged via three openings on a circumferential radius, each offset by 120 degrees. This gives good electrical contact with a favorable field distribution.
• the at least one electrical contact can be clamped between the outermost in the radial direction the electrically conductive area and the outer layer of the Foil with one opening, and / or can be passed through the opening flat, and / or can be clamped between the outer layer of the film and the jacket tube, in particular out through a respective slot in the jacket tube. Clamping is easy to manufacture, inexpensive and produces a good electrical, mechanically stable contact with tight winding of the film.
• the at least one electrical contact can be designed in the form of a flat strip, and / or can be folded out at an angle of essentially 45 degrees along the outer circumference of the cylindrical jacket tube, in particular with a longitudinal direction along a circular circumference of the jacket tube.
• a flat band-shaped electrical contact can be easily clamped between the film, is mechanically stable without breaking easily and results in a large area for good electrical conduction. Folding at an angle of essentially 45 degrees enables external electrical contact to be made simply and inexpensively, a change in direction of the longitudinal direction of the flat-band-shaped contact being produced by the folding.
• the film can have an electrically insulating polymer and / or paper, in particular impregnated with resin. This results in good electrical insulation over the film.
• the fitting body and / or the casing tube can be made of an electrically conductive material, in particular metal, in particular copper, aluminum and / or steel. This allows good electrical contact of the arrangement via the fitting body and / or the casing tube.
• the fitting body can comprise at least one electrical contact connection, in particular in the form of a socket, for connecting an earth potential.
• the electrically conductive areas can be formed between layers of the electrically insulating film from a metallic coating of the film or an inserted metallic film, in particular with a substantially cylindrical jacket shape of each conductive area between adjacent layers of the electrically insulating film, in particular spatially offset against each other along the longitudinal axis of the arrangement.
• a metallic coating of the film or an inserted metallic film are easy to wrap with the film and are inexpensive.
• the arrangement can be used for direct current applications
• DC high voltage spatially have the dimensions which are designed for an AC high voltage of a higher level, in particular with dimensions for exactly one AC high voltage level higher AC high voltage.
• a method according to the invention for the homogeneous control of high-voltage potentials along at least one insulator with a previously described arrangement comprises that resistive compensating currents along the electrically insulating film are reduced and / or avoided by designing for higher voltage levels and / or by an armature body, which acts as a first potential control coating, and / or by electrically contacting the outermost electrically conductive area between layers of electrically insulating film via an electrical contact through an opening in the outer layer of the insulating film.
• FIGS. 1 to 5 an embodiment of the invention is shown schematically in FIGS. 1 to 5 and described in more detail below.
• Figure 1 shows schematically in partial sectional view a RIP, d. H.
• Resign-Impregnated-Paper implementation 1 as an open air system in high-voltage technology with an arrangement 27 according to the invention for potential control viewed from one side, and
• FIG. 2 schematically, in partial sectional view, a high-voltage measuring transducer 11 as an outdoor system with the arrangement 27 according to the invention for potential control viewed from one side, and
• FIG. 3 shows schematically in sectional view the ends of the arrangement 27 according to the invention with a fitting body 28 at one end and a casing tube 32 at the other end of the arrangement 27 from FIG. 1, and
• FIG. 4 shows schematically the end with the valve body 28 of the
• Figure 5 schematically shows a part of the end with the jacket tube
• a RIP, ie a resign-impregnated paper bushing 1 for use in high-voltage technology is shown schematically in a partial sectional view viewed from one side.
• the implementation 1 comprises an arrangement 27 according to the invention for potential cutoff for direct current applications, especially in 550 kV DC bushings.
• the implementation 1 is cylindrical or constructed from two oppositely directed truncated cones, ie rotationally symmetrical metric with a longitudinal axis along a rod-shaped guide pin 5, the guide pin 5 forming the longitudinal axis.
• the arrangement 27 according to the invention for potential cutoff is arranged in a form-fitting manner around the guide pin 5.
• the guide pin 5 is z.
• B. a cylin-shaped metal rod made of copper, aluminum and / or steel.
• the arrangement 27 comprises an insulating body 3 made of z. B. around the guide pin 5 layers of an electrically insulating film which comprises electrically conductive areas 4 between the layers.
• the electrically conductive areas 4 are formed out as potential control pads and z. B. offset from each other, arranged along the longitudinal axis of the arrangement 27 overlapping between the layers of the insulating film.
• the electrically conductive Be rich 4 are z. B. as a metallic coating of the electrically insulating film or in each case as an inserted metallic cal foil between layers of the insulating film.
• the electrically conductive areas 4 z. B. from and / or comprise an electrically conductive material, in particular a metal, for. B. copper, aluminum and / or steel.
• the electrically insulating film consists and / or comprises paper, in particular a paper impregnated with resin. Alternatively or additionally, electrically insulating polymers can be used as the electrically insulating film.
• the implementation 1 can, for. B. for the connection of Transformato ren, which are located in a housing, can be used.
• a flange 6 is arranged around the circumference of the arrangement 27 according to the invention.
• the flange 6 comprises e.g. B. a measuring connection 7 and a drain valve 8, and seals the inner region of the transformer housing, which z. B. is filled with oil, against the outside, e.g. B. from a gas or air area.
• One end of the bushing 1 comprises the gas-side connection 2 outside the transformer housing and the opposite end comprises the transformer-side connection 9.
• an electrode 10 is arranged in a ring around the connection 9.
• a high-voltage transducer 11 as an outdoor system for use in high voltage technology viewed from one side is shown schematically in a partial sectional view.
• the high-voltage measuring transducer 11 comprises a housing 12 with a post insulator 15 and a pressure vessel 16 and the arrangement 27 according to the invention for potential cutoff in direct current applications, which projects from the pressure vessel 16 into the post insulator 15.
• a measuring device 13 of the high-voltage transducer 11 is arranged in the pressure vessel 6.
• the measuring device 13 is designed to measure a DC current in the range from a few hundred to a few thousand amperes and / or to measure a voltage in the range from a few thousand volts, in particular in the range from 145 to 800 kV.
• the measuring device 13 is designed as a current and / or voltage converter, or as a combination converter.
• the measuring device 13 comprises a current conductor which is arranged in the interior of the pressure vessel 16 and is surrounded by an annular coil which rotates around the current conductor.
• the current conductor is electrically connected outside the pressure vessel 16 via electrical connections 22 to an electrical network, an electrical load and / or a power generating device.
• the measuring coil is connected via electrically insulated lines to a terminal box 23 in which measuring devices, sensors and / or data processing, data transmission and / or data recording devices for measurement signals and their evaluation or transmission are arranged or can be connected.
• the pressure vessel 16 of the high-voltage transducer 11 is arranged on the support insulator 15, which is columnar out and upright, on a support 17 is net angeord.
• the carrier 17 comprises e.g. B. intersecting Stahlträ ger and is attached to a foundation, which for the sake of simplicity is not shown in the figures.
• the columnar support insulator 15 is fastened at one end, which is sealed gas-tight.
• the terminal box 23 is attached to the columnar support insulator 15 and devices such.
• B. a filling connection 19, a test connection 20 and / or a density monitor 21 are arranged at the end.
• the support insulator 15 and the pressure vessel 16 are, for. B. filled with SF 6 and / or Clean Air as the insulating gas 14 and sealed gas-tight as a housing 12. Filling can take place via the filler connection 19, and the tightness and the gas pressure inside can be checked via the test connection 20 and the density monitor 21.
• the pressure vessel 16 is pot-shaped Pleasebil det, arranged on the support insulator 15, with a rupture disc as a pressure device 18 at the upper end of the pressure vessel 16. With a strong pressure increase of the insulating gas 14 in the housing 12, for. B.
• the pressure vessel 16 is, for. B. made of steel, cast iron and / or aluminum, with a wall thickness, which an insulating gas pressure of z. B. holds 6 to 15 bar long-term stability.
• the wall thickness is z. B. in the range of millimeters down to centimeters.
• the columnar support insulator 15 is hollow inside, with a wall thickness, which also the insulating gas pressure of z. B. withstands 6 to 15 bar for a long time and supports the weight of the pressure vessel 16 with the attached connection loads.
• the Staueriso lator 15 is such. B. from ceramic, silicone, and / or from a composite material.
• the outer circumference of the post insulator 15 has annular lamellae running around the outer circumference, arranged at regular intervals along the longitudinal axis of the columnar post insulator 15. As a result, the leakage current path along the longitudinal axis of the columnar support insulator 15 is extended and the external insulation effect of the support insulator 15 is improved.
• a discharge pipe 26 is arranged along the longitudinal axis for grounding the measuring device 13 and is rotationally symmetrical around the discharge pipe
• a control electrode 25 is arranged in the upper region of the post insulator 15, in order to improve the field distribution in the region.
• the control electrode 25 and / or the discharge pipe 26 are in particular made of electrically highly conductive metals such as. B. copper and / or steel.
• the arrangement according to the invention is around the discharge pipe 26
• the arrangement 27 for potential reduction, in particular arranged rotationally symmetrically.
• the arrangement 27 according to the invention extends along the longitudinal axis of the discharge pipe 26 and envelops the circumference of the discharge pipe 26.
• the arrangement 27 according to the invention extends from the pressurized gas vessel 16 into the support insulator 15 along the central axis of the support insulator 15 Control from the high-voltage potential of the conductor to earth potential in the area of the terminal box 23.
• FIG. 3 the ends of the arrangement 27 according to the invention of Figures 1 and 2 are shown schematically enlarged in sectional view.
• One end ie the left end in FIG. speaks the area of the end of the feedthrough 1 with the gas-side connection 2 in FIG. 1 and the second end, ie the right end in FIG. 3, corresponds to the area of the transformer-side connection 9 in FIG. 1.
• the one end comprises a fitting body 28, which serves as a winding mandrel or winding tube and as the first potential control coating.
• the first layer of insulating film 29 is wound onto the fitting body 28 in particular in a form-fitting manner.
• the second end in FIG. 3 comprises a jacket tube 32.
• the jacket tube 32 is pushed onto the last, outer layer of the insulating film 29, in particular in a form-fitting manner.
• inventive arrangement 27 is electrically contacted, and the potential is between the two ends of the arrangement 27 via the electrically conductive areas or control pads 4, which staggered between the layers of insulating film 29 or are wound, taxed.
• Figure 4 shows the end of the inventive arrangement 27 with the fitting body 28 enlarged in detail.
• the fitting body 28 includes electrical contact connections 33, in particular in the form of oil seals, for electrical contacting, for. B. with earth potential. Lines for electrical contacting can, for. B. in the oil ge and / or screwed and / or soldered.
• valve body 28 as the first control covering with a first inner electrically conductive region 4 or control covering which is wound between the insulating film 29 is shown by way of example in FIG.
• Further control linings, not shown in FIG. 4, or electrically conductive regions 4 wound between insulating film 29, enable the potential cutoff over the entire length of the inventive arrangement 27.
• Figure 5 is a section of the second end of the inventive arrangement 27, ie in Figure 3, the right end, which z. B. corresponds to the area of the transformer-side connection 9 in Figure 1, shown enlarged.
• the coat- Pipe 32 is arranged on the last, outer layer of the insulating film 29, in particular in a form-fitting manner, in particular pushed onto the position of the film 29.
• a window or an opening 31 is incorporated in the outer layer of the insulating film 29, through which an electrical contact 30 leads to the underlying electrically conductive areas 4 ge.
• the contact 30 is z. B.
• a conductive strip in particular a flat conductor strip made of aluminum, copper and / or steel, which is clamped between the electrically conductive areas 4 and the outer layer of the insulating film 29, is guided through the opening 31 and between the jacket tube 32nd and the outer layer of the insulating film 29 is clamped.
• the electrical contact 30, in particular in the form of the conductor strip or flat conductor strip, is, for. B. through continuous slots in the jacket tube 32 to the outer circumference of the inven tional arrangement 27 and z. B. by clamping, soldering and / or screws z. B. be contacted with electrical leads to the outside, especially with high electrical potential.
• the outer electrically conductive region 4 can be electrically contacted via a slit and a conductor strip 30, which is guided through the respective opening 31 and slit to the outside, ie the region 4, which cuts along the radius perpendicular to the longitudinal axis of the circular cross section the arrangement 27 is furthest outside.
• radially successive regions 4 overlap along the longitudinal axis of the arrangement 27 according to the invention, each separated by a layer of insulating film 29 in particular insulating film 4 with intervening conductive areas 4 pushed jacket tube 32, z. B. at the end in the direction of the fitting body 28 pointing rounded to prevent a tension overhang on edges.
• z. B. more or less than three, offset by 120 degrees slits with arranged in the area in the outer layer of the insulating film 29 respective openings 31, in the inventive arrangement 27 are formed. It can e.g. B. an opening 31 and / or slit may be formed, or z. B. two, along the circumference of the arrangement 27 radially opposite openings 31 and / or slit be easilybil det. It can also include four openings 31 and / or slits, each offset by 90 degrees relative to one another and offset along the circumference of the circle. Instead of slits openings in the jacket tube 32 z. B. be provided in a rectangular or square shape, through which a guide strip 30 is guided.
• Guide strips 30 can be guided along the outer electrically conductive region 4, clamped by the outer layer of insulating film 29, along the longitudinal axis of the arrangement 27 according to the invention, in the region of the opening 30 folded 45 in the direction of the longitudinal axis through the opening to the outside and clamped by the jacket tube 32 and be guided in the direction of the vertical longitudinal axis through a slit in the tube 32 to the outside.
• Lending guide strips 30, such as. As shown in FIG.
• the inventive arrangement 27 avoids resistive DC currents along the electrically insulating film 29.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Insulators (AREA)
• Transformers For Measuring Instruments (AREA)
• Insulating Bodies (AREA)
• Insulation, Fastening Of Motor, Generator Windings (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=67809411

Family Applications (1)

Country Status (8)

Citations (1)

Family Cites Families (21)

• 2018
  • 2018-09-07 DE DE102018215274.8A patent/DE102018215274A1/de active Pending
• 2019
  • 2019-08-08 BR BR112021004217-2A patent/BR112021004217A2/pt active Search and Examination
  • 2019-08-08 CA CA3111846A patent/CA3111846A1/en active Pending
  • 2019-08-08 EP EP19761737.6A patent/EP3830848A1/de active Pending
  • 2019-08-08 US US17/274,231 patent/US12131860B2/en active Active
  • 2019-08-08 CN CN201980067819.0A patent/CN112868077B/zh active Active
  • 2019-08-08 WO PCT/EP2019/071291 patent/WO2020048720A1/de unknown
• 2021
  • 2021-03-05 CL CL2021000545A patent/CL2021000545A1/es unknown

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