EP0166951B1 - Transformator mit einer Hochstromdurchführungsanordnung - Google Patents

Transformator mit einer Hochstromdurchführungsanordnung Download PDF

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Publication number
EP0166951B1
EP0166951B1 EP85106455A EP85106455A EP0166951B1 EP 0166951 B1 EP0166951 B1 EP 0166951B1 EP 85106455 A EP85106455 A EP 85106455A EP 85106455 A EP85106455 A EP 85106455A EP 0166951 B1 EP0166951 B1 EP 0166951B1
Authority
EP
European Patent Office
Prior art keywords
winding
high current
windings
transformer
bushings
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.)
Expired
Application number
EP85106455A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0166951A1 (de
Inventor
Günther Bonni
Donald Dr. Dipl.-Ing. Brandes
Willi Dipl.-Ing. Dimmler
Helmut Dipl.-Ing. Feyertag
Heinrich Groher
Leo Janner
August Kömp
Walter Dr. Dipl.-Ing. Müller
Alfred Dipl.-Ing. Süppel
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.)
Transformatoren Union AG
Original Assignee
Transformatoren Union AG
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 Transformatoren Union AG, Siemens AG filed Critical Transformatoren Union AG
Priority to AT85106455T priority Critical patent/ATE29334T1/de
Publication of EP0166951A1 publication Critical patent/EP0166951A1/de
Application granted granted Critical
Publication of EP0166951B1 publication Critical patent/EP0166951B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/12—Two-phase, three-phase or polyphase transformers
    • 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
    • H01F27/2823—Wires
    • H01F27/2828—Construction of conductive connections, of leads

Definitions

  • the invention relates to a transform gate with a high-current bushing arrangement for three-phase three-phase current and with core legs and windings arranged spatially in a row.
  • furnaces In the chemical and metallurgical industries, electrically heated furnaces are used for a wide variety of purposes and operate at relatively low operating voltages with very high currents. Since the transmission of the high currents required for these furnaces over long distances is technically difficult and, moreover, also uneconomical, transformers are usually set up in the immediate vicinity of the furnaces, in which electrical energy fed in with high voltage is brought to the desired voltage level.
  • CH-A-409 130 discloses a transformer unit with a high-current winding, in which undervoltage windings, each consisting of a single turn, of a main and an auxiliary transformer are connected in series. Together, these two undervoltage windings have the shape of an eight.
  • the invention is therefore based on the object of providing a high-current bushing arrangement for a three-phase transformer in which an approximately uniform distribution of the current over the conductor cross sections is ensured independently of triangulation and which can be connected to non-triangulated supply lines by consumers without special transition sections.
  • This object is achieved in that two high-current feedthroughs are provided for each phase and that all six high-current feedthroughs are evenly distributed over a circle, the two high-current feedthroughs assigned to the middle leg lying opposite one another on the circle and in the circle encompassed by the high-current bushings generate an alternating field instead of a rotating field.
  • the high-current bushings are mounted in a single plate made of electrically conductive material carried by a boiler wall.
  • the high-current bushing arrangement according to the invention is advantageously simple and economical to produce even for very high currents and can also be used in existing systems with non-triangulated conductors.
  • Core legs 8 of a three-leg iron core of a main transformer are concentrically from the inside to the outside of a step winding 4, one high-voltage winding 3 and one low-voltage winding 1 each.
  • a three-leg iron core with core legs 9 is also provided for an additional transformer, each of which carries an overvoltage winding 5 and an undervoltage winding 2 concentrically from the inside to the outside.
  • the main transformer and the additional transformer are placed close to one another in a common boiler 10, usually filled with a cooling and insulating liquid, with a cover 11.
  • the high-voltage winding 3 is connected to a high-voltage supply network via high-voltage bushings (not shown) and induces a voltage in the undervoltage winding 1 coupled to it via the iron core of the main transformer and in Step winding 4.
  • the step winding 4 feeds the high-voltage winding 5 of the additional transformer with a voltage that can be adjusted in terms of size and direction using a step switch 6 and a turner 7.
  • the high-voltage winding 5 in turn induces a voltage in the undervoltage winding 2, which as a result of a series connection of the two undervoltage windings 1 and 2 is vectorially added or subtracted to the voltage induced by the high-voltage winding 3 in the undervoltage winding 1.
  • the undervoltage winding 1 and the undervoltage winding 2 are constructed from an equal number of electrically parallel winding sections made of stranded conductors as winding conductors and each have three turns in the exemplary embodiment shown.
  • Each of the winding conductors forms a single-layer winding section in each of the two undervoltage windings 1 and 2.
  • winding sections of the undervoltage windings 1 and 2 assigned to the same phase are each connected in series, with the connecting conductor 17 constituting winding conductor pieces crossing between the undervoltage windings 1 and 2, so that the undervoltage windings 1 and 2 have opposite winding directions.
  • the shape of an eight with three windings in each of the two winding sections results for their cross section at right angles to the winding axes.
  • the two winding sections each connected in series from the undervoltage windings 1 and 2 are wound in one go to avoid soldering points.
  • a sufficiently long winding piece for the last half turn and a rejection of the winding section to be wound last is fixed on the winding core used first.
  • the winding section to be wound first in the exemplary embodiment shown three windings of a strand for the undervoltage winding 1, is finished wound on this winding core.
  • the winding core is now shifted on the winding bench approximately at right angles to the winding conductor strand running up by the center distance of the undervoltage windings 1 and 2 transversely to the winding axis, and a second winding core is attached to the winding axis of the winding bench on this.
  • the second winding core protrudes from the first in the axial direction, so that the second winding section, in the illustrated embodiment two and a half turns of the undervoltage winding 2, can be wound slightly axially offset without interrupting the winding conductor strand.
  • the winding conductor is cut off and the end is bent and fixed to lead out. Now the winding conductor piece lying in front of the beginning of the first winding section is detached from the winding core used first, placed around the second winding core to form a half turn and likewise fixed at the end of this winding section after the second rejection has been bent.
  • the two winding sections which are wound in this way from a single piece, form a self-supporting component that can be handled as an independent element until later installation in the transformer arrangement.
  • any number of these independent elements can therefore be stacked axially one above the other without difficulty.
  • the number of parallel branches is therefore arbitrary, so that the undervoltage windings 1 and 2 can be adapted to practically any winding current.
  • a first circuit board 12 with high-current bushings 13 and a phase with a second circuit board 12 is connected either to a star point 19 (FIG. 3) or to the first circuit board 12 of the following phase to form an electrical delta circuit (FIG. 2) .
  • two, in total six, high-current bushings 13 are provided per phase, which are supported by a plate 14 distributed uniformly over the circumference of a circle. Due to the opposing arrangement of the two high current bushings 13 assigned to the middle core legs 8 and 9, these are not arranged cyclically, so that an alternating field prevails in the space between the high current bushings 13 instead of a rotating field.
  • the undervoltage windings 1 and 2 are subjected to high thermal stresses, radial cooling channels are provided between the individual windings, but at least between axially adjacent winding sections.
  • the high-voltage windings 3 and 5 are made shorter in the axial direction than the respectively associated undervoltage windings 1 and 2 by axially different distribution of the current to the parallel branches.
  • the winding arrangements of the individual phases each carry a press clamping jacket 20 that completely encompasses them, which is supported by spacer strips 21 on the circumference of one of the undervoltage windings 1 or 2.
  • These press cladding 20 serve to guide the cooling liquid by forcing it to flow through the windings even when driven by a circulating pump.
  • the heat dissipation from the windings is increased, so that, compared to arrangements with a cooling circuit driven purely thermally by convection, higher powers can be implemented with the same winding volume.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Testing Relating To Insulation (AREA)
  • Superheterodyne Receivers (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Transformers For Measuring Instruments (AREA)
EP85106455A 1984-06-07 1985-05-24 Transformator mit einer Hochstromdurchführungsanordnung Expired EP0166951B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85106455T ATE29334T1 (de) 1984-06-07 1985-05-24 Transformator mit einer hochstromdurchfuehrungsanordnung.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3421222 1984-06-07
DE3421222 1984-06-07
DE19843423902 DE3423902A1 (de) 1984-06-07 1984-06-28 Transformator mit einer hochstromdurchfuehrungsanordnung
DE3423902 1984-06-28

Publications (2)

Publication Number Publication Date
EP0166951A1 EP0166951A1 (de) 1986-01-08
EP0166951B1 true EP0166951B1 (de) 1987-09-02

Family

ID=25821932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85106455A Expired EP0166951B1 (de) 1984-06-07 1985-05-24 Transformator mit einer Hochstromdurchführungsanordnung

Country Status (4)

Country Link
EP (1) EP0166951B1 (no)
BR (1) BR8502696A (no)
DE (2) DE3423902A1 (no)
NO (1) NO164868C (no)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000050324A1 (de) 1999-02-23 2000-08-31 Bernd Federhen Vorrichtung und verfahren zum einschleusen von schüttgut in eine pneumatische förderleitung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3629310A1 (de) * 1986-08-28 1988-03-10 Transformatoren Union Ag Hochstromleiter fuer sondertransformatoren

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1393509A (fr) * 1964-02-12 1965-03-26 Materiel Electrique S W Le Traversée isolante sons forte intensité pour appareil électrique
DE1915864C3 (de) * 1969-03-28 1980-08-21 Horst 4050 Moenchengladbach Wionsek Drehstromöltransformator
DE2139663A1 (de) * 1971-08-07 1973-02-15 Schorch Gmbh Anordnung bestehend aus einer wahlweise in sternschaltung und anderer verkettung verkettbaren drehstromtransformatorwicklung mit einer zugehoerigen umschaltvorrichtung
US4375627A (en) * 1981-06-26 1983-03-01 Westinghouse Electric Corp. Transformer tank panel neutral connection with reverse current shielding conductors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000050324A1 (de) 1999-02-23 2000-08-31 Bernd Federhen Vorrichtung und verfahren zum einschleusen von schüttgut in eine pneumatische förderleitung

Also Published As

Publication number Publication date
NO851747L (no) 1985-12-09
NO164868C (no) 1990-11-21
BR8502696A (pt) 1986-02-12
DE3560542D1 (en) 1987-10-08
EP0166951A1 (de) 1986-01-08
NO164868B (no) 1990-08-13
DE3423902A1 (de) 1985-12-12

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