EP0109024A1 - Ligne pour courant fort triphasé - Google Patents

Ligne pour courant fort triphasé Download PDF

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Publication number
EP0109024A1
EP0109024A1 EP83111096A EP83111096A EP0109024A1 EP 0109024 A1 EP0109024 A1 EP 0109024A1 EP 83111096 A EP83111096 A EP 83111096A EP 83111096 A EP83111096 A EP 83111096A EP 0109024 A1 EP0109024 A1 EP 0109024A1
Authority
EP
European Patent Office
Prior art keywords
conductors
current line
winding
line according
transformer
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
EP83111096A
Other languages
German (de)
English (en)
Other versions
EP0109024B1 (fr
Inventor
Peter Henrici
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
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 filed Critical Transformatoren Union AG
Priority to AT83111096T priority Critical patent/ATE26038T1/de
Publication of EP0109024A1 publication Critical patent/EP0109024A1/fr
Application granted granted Critical
Publication of EP0109024B1 publication Critical patent/EP0109024B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/001—Power supply cables for the electrodes of electric-welding apparatus or electric-arc furnaces
    • 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 high-current line for three-phase current for the transmission of large electrical powers with very large currents with small voltage differences from a transformer to a neighboring bulk consumer, for example a steel melting furnace or an electrolytic bath, via conductors which are very wide in cross section in relation to their thickness.
  • the lines for such applications are, as can be seen, for example, from the connections of an oven transformer on page 2 of the transformer letter 29 published by the Transformatoren Union AG from April 1978, usually designed so that the individual conductors roughly the longitudinal edges of a three-sided column form.
  • a rotating stray field is formed outside of the conductors represented by plates or tubes.
  • Metallic or electrically conductive sheaths enclosing the entire line are therefore to be avoided because each such sheath is to be regarded as an externally attached short-circuit rotor which constantly absorbs the starting current.
  • the transformers provided for supplying steel melting furnaces and the like are equipped with oil cooling.
  • the active part of these transformers is therefore installed in a boiler filled with oil, through the side wall of which the winding leads must be led.
  • the conductors In the area of these bushings, too, the conductors have a very large width in relation to their thickness. Since the broadsides of the Due to the parallel winding axes themselves are also parallel to each other and at the same time the centroids of the conductor cross-sectional areas form the corners of an approximately equilateral triangle, the face ends of the conductors are practically opposite one another in the area of the leadthrough.
  • the invention is based on the object of creating a high-current line for transmitting very powerful currents from a large transformer to an adjacent large electrical consumer and thereby loading all cross-sectional parts of the conductors used with approximately the same current by keeping the line inductance small.
  • the object of the invention is achieved in that all individual conductors of a line from the winding in the transformer to the consumer in the area of the winding rejection as well as in the area of the passage through the boiler wall and as in an adjoining conductor section are each with their broad sides and face each other completely cover each other and that the width of these conductors is approximately equal to the winding height in the transformer.
  • the line-feeding undervoltage windings are in three corner switched by connecting the winding rejection of an undervoltage winding on one end leg closer to the middle leg to the rejection of the winding on the middle leg facing it and by leading the rejection of the windings on the end legs facing the ends out through the boiler wall and are only galvanically connected to one another shortly before or directly via the load path of the consumer and thereby form the third triangle point in the delta connection.
  • the ratio of the width of the conductors to their thickness is expediently between 50 and 150, preferably 100, and the distance between the conductors is greater than their thickness.
  • a high-current line designed according to the invention is very advantageous because there is practically no magnetic voltage generated by it outside of the space enclosed by its conductors.
  • the magnetic voltage in the three spaces between the conductors is symmetrical. Since the flow between flat conductors, which face each other with the large cross-sectional width, is guided very well due to the eddy currents which form easily, there is practically no scatter outside the conductors.
  • the inductive voltage drop in the cable routing according to the invention is also extremely small because the width of the conductors is much larger than their thickness and at the same time the distance of the conductors from one another is greater than the thickness of the conductors, but in absolute terms is very small. This results in a further advantage of the high-current line according to the invention in that the line requires less driving voltage, so that a lower nominal power for the transformer than with conventional arrangements is sufficient for a given consumer power.
  • the two external conductors are connected at the top and bottom with a crescent-shaped sealing strip to form a tube comprising the other two conductors and through which a coolant flows.
  • each of the conductors is composed of a plurality of electrically and spatially parallel, coolant-flowed tubes, and the voltage between two spatially adjacent conductors can be set individually.
  • the high-current line ends in a transfer piece in which the four conductors terminate in one in cross section three V-shaped conductors are led to a three-star star-composed conductor section, the outlets of the windings on the end legs facing the ends of the transformer being connected to the same V-shaped conductor.
  • Each of these V-shaped - 'conductors expediently ends in a triangular plate which is connected to a connection pole of the consumer via a flexible conductor bundle or via a series connection of a tube and a flexible conductor bundle.
  • An iron core carries with its middle leg 1 and end legs 2 and 3 radially inner high-voltage windings 4 and undervoltage windings 5, 6 and 7 arranged radially above it.
  • the undervoltage windings 5, 6 and 7 each consist of one turn and are bent from a sheet metal plate, the width of which is equal to that Winding length between a lower yoke 8 and an upper yoke, not shown.
  • the yokes 8 connect the ends of the end legs 2 and 3 to one another and to the ends of the middle leg 1.
  • the iron core is placed together with the high-voltage windings 4 and the low-voltage windings 5, 6 and 7 in a boiler with 01 side walls 9 filled with 01.
  • Winding rejections 10, 11, 12, 13, 14 and 15 are bent from extensions of the winding conductor of the respective undervoltage winding 5, 6 and 7 and are therefore as wide as the winding 5, 6 and 7 is long in the direction of its winding axis.
  • the winding rejections 10 to 15 are led out of the boiler through a multiple bushing 16 through the boiler side wall 9.
  • the winding leads 11 and 12 or 13 and 14 are each connected to one another and continued via a common thicker conductor 17 or 18.
  • the conductors 17 and 18 and the extensions of the winding leads 10 and 15 run spatially parallel and cover one another over their full width. To fix this position, the conductors 17 and 18 and the winding leads 10 and 15 are pressed onto spacer blocks 20 made of insulating material by means not shown.
  • the extensions of the winding leads 10 and 15 are supplemented outside of the boiler by crescent-shaped sealing strips 21 to form a tube 19 which carries the tension of the third corner point of the delta connection.
  • the tube 19 also serves to guide a cooling liquid and, by building up a line cooling system, enables a further increase in the operational reliability of the high-current line. With an appropriate arrangement of the terminals on the consumer to be supplied, the pipe 19 together with the conductors 17 and 18 is brought up to this directly.
  • the connecting devices of the consumer often form an approximately equilateral triangle with the focal points of their connecting terminals, so that it is necessary to transfer the line according to the invention into a triangulated line.
  • a transfer piece according to FIGS. 3, 4 and 5 is used.
  • the conductors 17 and 18 and the tube 19 are connected to conductors 22, 23 and 24 with a V-shaped cross section by the flat conductors 17 and 18 and the pipe 19, which has been broken up again into two flat bands, are each rotated half by 120 °.
  • the three conductors 22, 23 and 24 which are V-shaped in cross section are combined to form a three-pointed star.
  • a pulsating flow prevails between the opposite legs of the conductors 22, 23 and 24, while a rotating stray field is generated outside and around the conductor star.
  • the conductors 22, 23 and 24 combined to form the star of the conductor, however, enable problem-free connection via flexible intermediate conductors to consumers provided for this purpose. It is useful to connect the free ends of the conductors 22, 23 and 24 to flexible intermediate conductors across the longitudinal axis of the high-current line on the cross-sectionally V-shaped conductors 22, 23 and 24 attached plates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Induction Heating (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Thermistors And Varistors (AREA)
  • Waveguide Switches, Polarizers, And Phase Shifters (AREA)
  • Housings And Mounting Of Transformers (AREA)
EP83111096A 1982-11-16 1983-11-07 Ligne pour courant fort triphasé Expired EP0109024B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83111096T ATE26038T1 (de) 1982-11-16 1983-11-07 Hochstromleitung fuer drehstrom.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823242438 DE3242438A1 (de) 1982-11-16 1982-11-16 Hochstromleitung fuer drehstrom
DE3242438 1982-11-16

Publications (2)

Publication Number Publication Date
EP0109024A1 true EP0109024A1 (fr) 1984-05-23
EP0109024B1 EP0109024B1 (fr) 1987-03-18

Family

ID=6178301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83111096A Expired EP0109024B1 (fr) 1982-11-16 1983-11-07 Ligne pour courant fort triphasé

Country Status (4)

Country Link
EP (1) EP0109024B1 (fr)
JP (1) JPS59103317A (fr)
AT (1) ATE26038T1 (fr)
DE (2) DE3242438A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0278098A3 (en) * 1987-02-09 1988-10-12 Elpatronic Ag Resistance seam-welding machine
CN108922746A (zh) * 2018-06-26 2018-11-30 河南森源电气股份有限公司 三相变压器

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3411141C2 (de) * 1984-03-26 1986-07-31 Transformatoren Union Ag, 7000 Stuttgart Transformator mit Hochstromdurchführung
DE3629310A1 (de) * 1986-08-28 1988-03-10 Transformatoren Union Ag Hochstromleiter fuer sondertransformatoren
DE9105967U1 (de) * 1991-05-14 1992-09-17 Siemens AG, 8000 München Transformatorspule mit Anschlußschienen
DE19947917A1 (de) * 1999-10-06 2001-04-12 Abb Research Ltd Transformator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT148848B (de) * 1935-02-05 1937-03-10 Ludwig Gavanda Dr Ing Ein- oder Mehrphasenhochstromleitung.
US3125622A (en) * 1960-07-25 1964-03-17 Conductors for arc furnaces
DE2501510B2 (de) * 1975-01-16 1978-06-22 Transformatoren Union Ag, 7000 Stuttgart Wicklung für Transformatoren und Drosseln
US4174509A (en) * 1977-12-29 1979-11-13 General Electric Company Furnace transformer having a low-voltage internally-connected delta winding

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT148848B (de) * 1935-02-05 1937-03-10 Ludwig Gavanda Dr Ing Ein- oder Mehrphasenhochstromleitung.
US3125622A (en) * 1960-07-25 1964-03-17 Conductors for arc furnaces
DE2501510B2 (de) * 1975-01-16 1978-06-22 Transformatoren Union Ag, 7000 Stuttgart Wicklung für Transformatoren und Drosseln
US4174509A (en) * 1977-12-29 1979-11-13 General Electric Company Furnace transformer having a low-voltage internally-connected delta winding

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0278098A3 (en) * 1987-02-09 1988-10-12 Elpatronic Ag Resistance seam-welding machine
CN108922746A (zh) * 2018-06-26 2018-11-30 河南森源电气股份有限公司 三相变压器
CN108922746B (zh) * 2018-06-26 2023-12-22 河南森源电气股份有限公司 三相变压器

Also Published As

Publication number Publication date
DE3370400D1 (en) 1987-04-23
JPS59103317A (ja) 1984-06-14
ATE26038T1 (de) 1987-04-15
DE3242438A1 (de) 1984-05-17
EP0109024B1 (fr) 1987-03-18

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