EP3076409A1 - Connexion électrique d'enroulements écartés les uns des autres - Google Patents

Connexion électrique d'enroulements écartés les uns des autres Download PDF

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Publication number
EP3076409A1
EP3076409A1 EP15161614.1A EP15161614A EP3076409A1 EP 3076409 A1 EP3076409 A1 EP 3076409A1 EP 15161614 A EP15161614 A EP 15161614A EP 3076409 A1 EP3076409 A1 EP 3076409A1
Authority
EP
European Patent Office
Prior art keywords
winding
electrode
connecting element
conductor
electrical component
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15161614.1A
Other languages
German (de)
English (en)
Other versions
EP3076409B1 (fr
Inventor
Ronny Fritsche
Christian ROST
Jens Hoppe
Carsten Koczula
Wolfgang Kutzleb
Johann KÖHL
Klaus Müller
Johann Schlager
Karsten LOPPACH
Rene Martin Wimmer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP15161614.1A priority Critical patent/EP3076409B1/fr
Publication of EP3076409A1 publication Critical patent/EP3076409A1/fr
Application granted granted Critical
Publication of EP3076409B1 publication Critical patent/EP3076409B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
    • 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
    • H01F27/2823—Wires
    • H01F27/2828—Construction of conductive connections, of leads
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • 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
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/303—Clamping coils, windings or parts thereof together
    • 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
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures

Definitions

  • the invention relates to a connecting element for the electrical connection of spaced-apart windings of an inductive electrical component and an inductive electrical component with spaced-apart windings.
  • the invention relates to the electrical connection of windings of transformers for high-voltage DC transmission, which are designed for high test AC voltages and test DC voltages of several hundred kilovolts.
  • transformers often have a plurality of windings connected in parallel.
  • discharges of windings are led out separately in the axial, radial or obliquely out of the winding.
  • These leaks are often led out, especially for high test voltages, in an electrode with feedthroughs of the transformer and then out of the boiler of the transformer.
  • the connection of the parallel branches preferably also takes place in electrodes.
  • the invention has for its object to provide an improved connection element for the electrical connection of spaced-apart windings of an inductive electrical component and an improved inductive electrical component with spaced-apart windings.
  • Such a connecting element allows by a corresponding design and electrical insulation of the tubular electrode a particularly space-saving connection of windings of an inductive electrical component, in particular a transformer or a choke coil, and thus a compact design of the respective component.
  • the simple design of the connecting element also requires only a small amount of material and is therefore particularly cost-effective.
  • An embodiment of the invention provides that the electrode is composed of at least two interconnected electrode parts.
  • This embodiment of the invention advantageously facilitates the assembly of the connecting element by the electrode can be assembled by connecting the electrode parts to the conductor after connecting the electrical conductors.
  • the electrode has a cross section with a circular or elliptical or rectangular outer contour.
  • Cross-sections with a circular or elliptical contour advantageously avoid edges or tips of the electrode, which can lead to high electric field strengths.
  • Cross sections with a rectangular contour advantageously facilitate the storage and transport of the electrodes or electrode parts.
  • a further embodiment of the invention provides that the electrode has two straight end sections and a bent central section connecting the two end sections, so that longitudinal axes of the two end sections are at an intersection angle which is between 90 degrees and 180 degrees, and is particularly preferably approximately 100 degrees , to cut.
  • This embodiment of the invention advantageously allows a particularly space-saving connection of windings by bent connecting elements.
  • a further embodiment of the invention provides that the electrode has a cross section whose outer diameter is at least 60 mm and at most 300 mm.
  • Electrodes with cross sections of these dimensions have proven to be particularly suitable for connecting windings.
  • An outer diameter of a cross section is understood here to be a maximum extent of the cross section.
  • each end of the electrode is bent into a cavity surrounded by the electrode.
  • This embodiment of the invention advantageously avoids the occurrence of high electric field strengths at the electrode ends caused by peaks or edges of the electrode ends.
  • a further embodiment of the invention provides that the electrode outer surface of the electrode is surrounded by an electrically insulating and applied to the electrode outer surface insulating jacket, in particular of an insulating jacket made of a paper.
  • the insulating jacket is further surrounded by at least one electrically insulating and spaced from the insulation jacket insulation barrier, which is preferably made of pressboard.
  • the connecting element can be given a high electrical insulation capacity and in particular an oil path (in the case of an inductive electrical component with an oil-filled grounded housing) in the region of the connecting element advantageously in a plurality of oil passages are divided, so that the connecting element can be arranged at a relatively small distance from a housing of the inductive electrical component.
  • an oil path in the case of an inductive electrical component with an oil-filled grounded housing
  • An inductive electrical component according to the invention comprises two windings spaced apart from one another, between which two connecting elements according to the invention are arranged.
  • a first winding has a first winding end, which is connected via a conductor of a first connecting element with a first electrical connection, and a second winding end, which is connected via a conductor of the second connecting element with a second electrical connection on.
  • Such an inductive electrical component thus has (at least) two windings, which are connected to one another via two connecting elements according to the invention with the advantages already mentioned above, wherein one of the windings is connected to electrical connections via the conductors of the connecting elements.
  • this allows a compact and cost-effective connection of the windings of the device.
  • the conductor of the first connection element connected to the first winding end of the first winding is preferably connected to the first electrical connection via a first connection conductor which extends through a region of a first winding end of the second winding.
  • the conductor of the second connection element connected to the second winding end of the first winding is preferably connected to the second electrical connection via a second connection conductor which extends through a region of a second winding end of the second winding.
  • inventions of the invention thus provide for guiding at least one connecting conductor for connecting a winding with an electrical connection through a region of another winding. This advantageously additional space required for the connection of a winding with an electrical connection is avoided.
  • the windings are further connected in parallel to each other electrically.
  • the inductive electrical component preferably has a magnetizable component core with a plurality of legs, with exactly one winding running around each leg.
  • the inductive electrical component is also preferably designed as a transformer or a choke coil.
  • FIG. 1 shows an active part 2 of a trained as a transformer inductive electrical component 1 in a section of a perspective view.
  • the active part 2 is arranged in a boiler filled with an oil (not shown).
  • the inductive electrical component 1 comprises two spaced-apart windings 3, 4, between which two connecting elements 6, 7 are arranged.
  • FIG. 2 shows a first embodiment of a arranged between two windings 3, 4 connecting element 6 in a sectional view.
  • the connecting element 6 comprises an electrically conductive tubular electrode 10 with open electrode ends 12, which respectively face a winding 3, 4, and an electrical conductor 14 guided through the electrode 10, which is electrically connectable to a winding 3, 4.
  • the electrode 10 has two straight end portions 16, 17 and a bent central portion 18 connecting the two end portions 16, 17 so that longitudinal axes of the two end portions 16, 17 intersect at an intersecting angle of about 100 degrees.
  • Each end portion 16, 17 is at a right angle from the adjacent winding 3, 4 from.
  • the electrode 10 is composed of at least two electrode parts, which are connected to each other for example by screwing, welding or by plugging.
  • the two end portions 16, 17 and the middle portion 18 are each formed as an electrode part.
  • the entire electrode 10 or its middle section 18 and / or at least one end section 16, 17 may be composed of two respective channel-like electrode parts, which are interconnected in a plane passing through the two electrode ends 12.
  • Each electrode end 12 is inwardly, d. H. bent into a cavity surrounded by the electrode 10 inside.
  • the electrode 10 has a cross section with a circular or elliptical or rectangular outer contour.
  • the outer diameter of the cross section is preferably at least 60 mm and at most 300 mm.
  • the electrode 10 is made of an electrically conductive material such as copper or aluminum, or it consists of an electrically non-conductive body with an electrically conductive or semiconductive coating.
  • the electrode outer surface of the electrode 10 is surrounded by an electrically insulating and applied to the outer electrode surface insulating jacket 20, which consists for example of a paper.
  • the insulating jacket 20 preferably has a thickness between a few millimeters and about 70 mm. Towards the electrode ends 12, the thickness of the insulation jacket 20 may decrease, with the decrease taking place, for example, in a stepped manner. Preferably, the insulation jacket 20 also extends beyond the inwardly bent electrode ends 12 into the cavity surrounded by the electrode 10.
  • the insulation jacket 20 is surrounded by a plurality of electrically insulating insulation barriers 22 spaced apart from one another and from the insulation jacket 20.
  • spacers (not shown), such as pads or ledges, are disposed between the isolation jacket 20 and the innermost isolation barrier 22, as well as between adjacent isolation barriers 22.
  • the isolation barriers 22 are each made of pressboard, for example. The isolation barriers 22 each end in front of the electrode ends 12, so that the electrode ends 12 are not surrounded by the isolation barriers 22.
  • the windings 3, 4 are each surrounded by a plurality of spaced-apart electrically insulating insulating walls 24, which are formed substantially cylindrical and have recesses for the electrode ends 12.
  • the insulation walls 24 are each made of pressboard, for example.
  • each insulation chimney 26 has a hollow-cylindrical section into which at least one barrier end of an insulation barrier 22 protrudes. Further, each insulation chimney 26 on the winding side has a flange-like portion projecting outwardly from its hollow cylindrical portion, which extends around the insulation walls 24 and around edges of the insulation walls 24 forming the recesses for the electrode ends 12 in the insulation walls 24.
  • each insulation chimney 26 is arranged between the hollow-cylindrical sections of each two adjacent insulation chimneys 26.
  • the insulation chimneys 26 are each made of pressboard, for example.
  • isolation barriers 22, insulation walls 24 and insulation chimneys 26 are used to divide oil paths in the region of the electrode 10 and the windings 3, 4.
  • One of the windings 3, 4 is analogous to the FIGS. 3 to 6 connected via the conductor 14 with an electrical connection 38.
  • FIGS. 3 and 4 schematically show a first embodiment of two electrically parallel connected windings 3, 4 of an inductive electrical component 1. It shows FIG. 3 a sectional view from above and FIG. 4 shows a sectional view of the page.
  • each winding 3, 4 each extend around a leg 30 of a component core of the inductive electrical component 1.
  • each winding 3, 4 has a first winding end 34, which is located in the region of a first end of the respective leg 30, and a second winding end 35, which is located in the region of a second end of the respective leg 30.
  • Each conductor of a winding 3, 4 winds around many times and spirally around the respective leg 30 and is in FIG. 3 only hinted.
  • FIG. 3 Analogous to FIG. 1 are between the windings 3, 4, two connecting elements 6, 7 are arranged, of which in FIG. 3 only a first connecting element 6 is visible, which is arranged between the two windings 3, 4 at the height of the first winding ends 34.
  • the second connecting element 6 runs parallel to the first connecting element 7 between the two windings 3, 4 at the height of the second winding ends 35.
  • the connecting elements 6, 7 of this embodiment are analogous to that in FIG FIG. 2 illustrated connecting member 6 is formed with the difference that their electrodes 10 are each designed as a straight pipe instead of a bent extending pipe.
  • the open electrode end 12 of the electrode 10 of the first connecting element 6 faces the first winding end 34 of a first winding 3 and the conductor 14 guided in this electrode 10 is electrically connected to the first winding end 34 of the first winding 3.
  • the open electrode end 12 of the electrode 10 of the second connecting member 7 faces the second winding end 35 of the first winding 3, and the conductor 14 guided in this electrode 10 is electrically connected to the second winding end 35 of the first winding 3.
  • the conductor 14 of the first connection element 6 is connected via a first connection conductor 36, which extends through a region of the first winding end 34 of the second winding 4, to a first electrical connection 38 to which the first winding end 34 of the second winding 4 is also electrically connected is.
  • the conductor 14 of the second connection element 7 is connected via a second connection conductor 37 which extends through a region of the second winding end 35 of the second winding 4 to a second electrical connection 39 to which the second winding end 35 of the second winding 4 is also electrically connected is.
  • the two windings 3, 4 are connected in parallel with each other electrically.
  • Each electrode 10 is preferably placed at the same electrical potential as the conductor 14 carried therein.
  • FIGS. 5 and 6 show schematically analog to Figure 3 in a sectional view from above further embodiments of two electrically parallel connected windings 3, 4 of an inductive electrical component 1, between which two connecting elements 6, 7 are arranged, of which in the FIGS. 5 and 6 only a first connecting element 6 is visible.
  • the in the FIGS. 5 and 6 Arrangements shown differ from those in FIG. 3 shown arrangement only by the shape and position of the connecting elements 6, 7th
  • the connecting elements 6, 7 of in FIG. 5 The arrangement shown are analogous to that in FIG. 2 illustrated connecting element 6 each bent with the same length end portions 16, 17 of the electrodes 10 executed. In contrast to FIG. 2 However, the connecting elements 6, 7 each extend between two directly opposite points of the windings 3, 4 and the end portions 16, 17 are not each at a right angle from the windings 3, 4 from.
  • connecting elements 6, 7 of in FIG. 6 The arrangement shown are also analogous to that in FIG. 2 each connecting element 6 shown bent, however, their electrodes 10 each have different lengths end portions 16, 17.
  • FIG. 7 schematically shows three electrically connected in parallel and successively arranged windings 3, 4, 5 of an inductive electrical component 1 in one FIG. 3 analog sectional view from above.
  • the windings 3, 4, 5 extend in each case around a leg 30 of a component core of the inductive electrical component 1, and each winding 3, 4, 5 has a first winding end 34, which is located in the region of a first end of the respective leg 30. and a (in FIG. 7 not visible) second winding end 35, which is located in the region of a second end of the respective leg 30.
  • Analogous to FIG. 1 are between two adjacent windings 3, 4, 5, two connecting elements 6, 7 are arranged, of which in FIG. 7 only one first connecting element 6 is visible, which is arranged between the respective two windings 3, 4, 5 at the height of the first winding ends 34.
  • the respective second connecting element 7 runs parallel to the first connecting element 6 between the two windings 3, 4, 5 at the level of the second winding ends 35.
  • connecting elements 6, 7 are each analogous to that in FIG FIG. 2 formed connecting element 6 is formed.
  • the first winding end 34 of a first winding 3 is connected via a conductor 14 of a first connecting element 6, which is arranged between the first winding 3 and a second winding 4, and a conductor 14 of a first connecting element 6, between the second winding 4 and the third Winding 5 is arranged, as well as two connection conductors 36 connected to a first electrical connection 38.
  • the first winding end 34 of the second winding 4 is connected to the first electrical connection 38 via a further conductor 14 of the first connecting element 6, which is arranged between the second winding 4 and a third winding 5, and a further connecting conductor 36.
  • the first electrical terminal 38 is further connected to the first winding end 34 of the third winding 5.
  • the second winding end 35 of the first winding 3 via a conductor 14 of a second connecting element 7, which is arranged between the first winding 3 and a second winding 4, and a conductor 14 of a second connecting element 7, which between the second winding 4 and the third winding 5 is connected to a (not shown) second electrical connection 39.
  • the second winding end 35 of the second winding 4 is connected to the second electrical connection 39 via a further conductor 14 of the second connecting element 7, which is arranged between the second winding 4 and a third winding 5.
  • the second electrical terminal 39 is further connected to the second winding end 35 of the third winding 5.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP15161614.1A 2015-03-30 2015-03-30 Connexion électrique d'enroulements écartés les uns des autres Active EP3076409B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15161614.1A EP3076409B1 (fr) 2015-03-30 2015-03-30 Connexion électrique d'enroulements écartés les uns des autres

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15161614.1A EP3076409B1 (fr) 2015-03-30 2015-03-30 Connexion électrique d'enroulements écartés les uns des autres

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EP3076409A1 true EP3076409A1 (fr) 2016-10-05
EP3076409B1 EP3076409B1 (fr) 2017-12-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021209325A1 (fr) * 2020-04-14 2021-10-21 Siemens Aktiengesellschaft Appareil électrique pourvu d'une cuve dotée d'une partie à bombement convexe

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011008456A1 (de) * 2011-01-07 2012-07-12 Siemens Aktiengesellschaft Leitungsführung für HGÜ-Transformatorspulen oder HGÜ-Drosselspulen
EP2819132A1 (fr) * 2013-06-25 2014-12-31 Alstom Technology Ltd Procédé d'assemblage d'un transformateur

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011008456A1 (de) * 2011-01-07 2012-07-12 Siemens Aktiengesellschaft Leitungsführung für HGÜ-Transformatorspulen oder HGÜ-Drosselspulen
EP2819132A1 (fr) * 2013-06-25 2014-12-31 Alstom Technology Ltd Procédé d'assemblage d'un transformateur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021209325A1 (fr) * 2020-04-14 2021-10-21 Siemens Aktiengesellschaft Appareil électrique pourvu d'une cuve dotée d'une partie à bombement convexe

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