EP0154697B1 - Enroulement à haute tension avec distribution du potentiel contraint pour transformateurs - Google Patents

Enroulement à haute tension avec distribution du potentiel contraint pour transformateurs Download PDF

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Publication number
EP0154697B1
EP0154697B1 EP84115084A EP84115084A EP0154697B1 EP 0154697 B1 EP0154697 B1 EP 0154697B1 EP 84115084 A EP84115084 A EP 84115084A EP 84115084 A EP84115084 A EP 84115084A EP 0154697 B1 EP0154697 B1 EP 0154697B1
Authority
EP
European Patent Office
Prior art keywords
winding
voltage
voltage winding
resistor
capacitor
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
EP84115084A
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German (de)
English (en)
Other versions
EP0154697A1 (fr
Inventor
Walter Dr. Dipl.-Ing. Müller
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 AT84115084T priority Critical patent/ATE27381T1/de
Publication of EP0154697A1 publication Critical patent/EP0154697A1/fr
Application granted granted Critical
Publication of EP0154697B1 publication Critical patent/EP0154697B1/fr
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • 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
    • H01F27/343—Preventing or reducing surge voltages; oscillations
    • H01F27/345—Preventing or reducing surge voltages; oscillations using auxiliary conductors

Definitions

  • the invention relates to a high-voltage winding with controlled voltage distribution for transformers with large nominal powers, special conductors which are currentless in normal operation being wound up to form capacitor coils for voltage control.
  • a capacitor battery has become known from DE-A-23 28 375, the individual capacitors of which winding sections assigned to them are connected in parallel. These capacitor banks are arranged spatially next to the transformer windings and are therefore not linked to the flux passing through the high-voltage windings. These capacitor batteries therefore ensure a good distribution of impulse voltages impinging on the transformer winding, but on the other hand cause only minimal or no damping of vibrations in the windings excited by switching voltages.
  • Transformer windings provided with control conductors behave similarly in accordance with DE-B-10 69 279, DE-A-24 18 230 and DE-A-23 23 304.
  • These known winding arrangements also consist of disc coils with wrapped control conductors or of winding layers wrapped control conductors built windings.
  • the control conductors provided in the known windings are capacitively coupled to the associated winding and are de-energized in normal operation. These control conductors also have only a very slight influence on the damping of vibrations in the windings excited by switching voltages.
  • an adjustable power transformer with a cylinder winding that can be connected to a high-voltage network and consists of a main and step winding, and a series circuit comprising an ohmic resistor and a capacitor for damping winding vibrations when subjected to surge voltage Serving and connected in parallel to a winding part RC element,
  • the step winding connected to a switching device consists of a coarse step winding that can be switched on and off and a fine step winding that is provided with tapping and coaxially arranged, the coarse step winding between the radially outer fine step winding and the radially inner one Main winding arranged and the RC element are connected in parallel to the coarse step winding and the effective resistance of the RC element for an angular frequency corresponding to a natural vibration of the coarse step winding is approximately equal to its reactance is selected.
  • the invention is therefore based on the object of providing an arrangement for high-voltage windings with controlled voltage distribution of the type mentioned at the outset, by means of which a good effective damping of oscillating voltages in the windings is ensured in the region of their natural frequencies.
  • This object is achieved in high-voltage windings with capacitor coils connected in parallel in that the capacitor coils are chained with the same flux as the high-voltage winding to be controlled and in that the two sides of each capacitor formed by the capacitor coils are connected to one another via an ohmic resistor, so that they are connected to one another together represent an RC element inductively coupled to the high-voltage winding.
  • each capacitor coil is designed as a double-disc coil consisting of two or four spatially wound conductors, one side of the capacitor coils is connected to the high-voltage winding via a potential connection, and the ohmic resistors and / or the capacitor coils are in shield rings provided for controlling the end potential field , foil-wrapped, non-conductive material.
  • Another advantageous embodiment consists in that the currentless conductor is also wrapped in the high-voltage winding and connected to it via an ohmic resistor, so that the conductor of the high-voltage coil is itself one side of the capacitor.
  • Expedient embodiments of the invention when used in fine-stage layer windings consist in the fact that the currentless conductor represents an additional gear in a fine-stage layer winding designed as a multi-start spiral, or in a fine-stage layer winding that is interwoven in sections with two stages per section for an odd number of stages one in one section existing idle gear is connected to the ohmic resistor and serves as a currentless conductor.
  • Appropriate configurations of the ohmic resistor used also consist in the fact that it is voltage-dependent or that it consists of the parallel connection of a voltage-dependent resistor with a fixed resistor.
  • Expedient embodiments of the invention when used in normal, not interwoven, coils consist in the fact that the currentless conductor is installed as an additional coil between two coils of the winding or in that the currentless conductor or capacitor coating is designed as a shield ring.
  • the analog solution for normal, not interwoven, layer windings is to design the currentless conductor or capacitor covering as an input sign.
  • the wiring of high-voltage windings according to the invention is very advantageous because it enables frequency-dependent damping of voltage oscillations in the high-voltage winding in a simple manner by suitably setting the ohmic resistance, without causing a significant increase in losses at the operating frequency.
  • a particularly effective damping of the high-voltage winding is forced by arranging the capacitor coils in the region of the antinodes of the magnetic stray field.
  • a winding composed of two parts 12 and 13 lying axially one behind the other is arranged around an iron core leg 11, which is only indicated by a dashed line.
  • the winding is carried out in a known manner as a layer or disc coil winding.
  • a capacitor coil 14 is arranged, each consisting of two currentless conductors 15.
  • the currentless conductors 15, each forming a capacitor coil 14, are wound spirally to form a disk coil, which, due to their spatial arrangement, are chained in front of or between the end faces of the parts 12 and 13 with the same flux as the winding itself.
  • each of the capacitor coils 14 forms an RC element together with the resistor 16 assigned to it.
  • the capacitor coils 14 and the winding of the parts 12 and 13 are inductively coupled to one another as a result of the linkage with the same flux, so that the resulting damping resistance of the RC element is transferred into the winding by means of a transformer. This damping keeps the amplitudes of vibrations excited, for example, by switching voltages, in manageable orders of magnitude without any particular effort.
  • the capacitor coil 14 consists of two disk coils, which have the same dimensions as the disk coils in the adjacent parts 12 and 13 of the connected winding.
  • the capacitor coil 14 is spirally wound from two currentless conductors 15.
  • the two conductors 15 are crossed out in the area of the inner windings of the disc coils.
  • the two sides of the capacitor are connected to one another via a voltage-dependent resistor 17.
  • the capacitor coils 14 and the parts 12 and 13 are in turn inductively coupled to one another, so that a damping resistor is also transmitted into the winding in this arrangement.
  • FIG. 3 largely corresponds to that according to FIG. 2.
  • the capacitor coils 14 are spirally wound from four currentless conductors 15.
  • a parallel circuit comprising a fixed resistor 16 and a voltage-dependent resistor 17 is provided as an ohmic resistor.
  • the embodiment according to FIG. 4 also relates again on a winding of disc coils, the winding being composed of parts 12 and 13.
  • the conductor of the winding carrying the load current which is also wound in the region of the capacitor coils 14, additionally takes on the function of a currentless conductor, so that only a single currentless conductor 15 is required.
  • This currentless conductor 15 is guided over two disc coils and also crossed out in addition to the outcrossing of the conductor carrying the load current.
  • one end of the conductor 15 and the winding of the conductor carrying the load current, the other end of which is adjacent are connected to one another by a fixed resistor 16.
  • the capacitor coils 14 also preferably have the dimensions of the disk coils in the parts 12 and 13 of the winding.
  • FIG. 5 shows a single-layer coarse stage winding with a conductor 18 carrying the load current and a currentless conductor 15 wound in parallel with it spatially.
  • the two conductors 18 and 15 in turn form the two sides of a capacitor.
  • One end of the coarse stage winding is connected to the other end of the currentless conductor 15 opposite its other end via a fixed resistor 16, so that an RC element which is inductively coupled to the coarse stage winding is formed.
  • FIG. 6 shows a fine-stage winding consisting of four conductors 18 with the taps 1 to 5 that are spatially parallel in one position and carry the load current.
  • An electroless conductor 15 is also wound into this winding position in an additional gear. The beginning of one of the conductors 18 carrying the load current is connected to the end of the de-energized conductor 15 via a fixed resistor 16 analogous to the embodiment according to FIG. 5.
  • FIG. 7 shows a single-layer fine-stage winding, interwoven in sections, with taps 1 to 10 and with two stages per section, so that an even number of gears is required. Considering the level selector, however, an odd number of levels is appropriate. As a result, there is an idling gear with the number of turns of one stage in such windings. In the exemplary embodiment shown in FIG. 7, the end of this idling gear is connected to the beginning of the associated step winding via a fixed resistor 16.
  • the idling gear takes over the function of the currentless conductor 15 by forming a coil-shaped capacitor with the turns of the associated step winding, which in turn, with the fixed resistor 16, represents an RC element which is inductively coupled to the fine step winding.
  • FIGS. 9-11 show a high-voltage winding, the capacitor coil 14 and / or the resistors 16, 17 being inserted into shielding vings made of film-wrapped, non-conductive material for controlling the end potential field.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Regulation Of General Use Transformers (AREA)

Claims (10)

1. Enroulement à haute tension avec répartition commandée de la tension, pour des transformateurs possédant des puissances nominales élevées et dans lequel pour réaliser la commande de la tension, des conducteurs particuliers (15), non alimentés en courant lors du fonctionnement normal, sont enroulés de manière à former des bobines de condensateur (14), caractérisé par le fait
- que les bobines de condensateur (14) sont parcourues par le même flux que l'enroulement à haute tension (12 et 13) devant être commandé, et
- que les deux côtés de chaque condensateur formé par les bobines de condensateur (14), sont reliés entre eux par l'intermédiaire d'une résistance ohmique (16, 17) de sorte qu'ils représentent en association avec cette résistance, un circuit RC couplé de façon inductive à l'enroulement à haute tension (12, 13).
2. Enroulement à haute tension suivant la revendication 1, caractérisé par le fait que chaque bobine de condensateur (14) est réalisée sous la forme d'une bobine double formée de deux ou de quatre conducteurs (15) bobinés en parallèle dans l'espace (figure 2 ou 3).
3. Enroulement à haute tension suivant les revendications 1 et 2, caractérisé par le fait qu'une borne de la résistance ohmique (16, 17) est raccordée par l'intermédiaire d'une liaison de potentiel à l'enroulement à haute tension.
4. Enroulement à haute tension suivant les revendications 1 à 3, caractérisé par le fait que les bobines de condensateur (14) et/ou les résistances (16, 17) sont insérées dans des anneaux de protection qui sont prévus pour la commande du champ de potentiel au niveau des faces frontales, et sont constitués en un matériau non conducteur enroulé sous forme de feuille (figures 9-11).
5. Enroulement à haute tension suivant la revendication 1, caractérisé par le fait que le conducteur non alimenté en courant (15) est enroulé conjointement dans l'enroulement à haute tension et est relié à ce dernier par l'intermédiaire de la résistance ohmique (16, 17), de sorte que le conducteur de la bobine à haute tension constitue lui-même une face du condensateur (figures 4, 5, 6 et 7).
6. Enroulement à haute tension suivant les revendications 1 à 5, caractérisé par le fait que le conducteur sans courant (15) représente une spire supplémentaire dans un enroulement à couches à échelonnement fin réalisé sous la forme d'une hélice à plusieurs spires (figure 6).
7. Enroulement à haute tension suivant les revendications 1 et 5, caractérisé par le fait que dans un enroulement formé de couches à échelonnement fin, qui, par intervalles, est formé par l'enroulement imbriqué de deux échelons respectifs dans chaque intervalle, pour un nombre impair d'échelons, une spire fonctionant à vide est présente dans un intervalle et est raccordée à la résistance ohmique (16, 17) et sert de conducteur sans courant (figure 7).
8. Enroulement à haute tension suivant l'une des revendications 1 à 7, caractérisé par le fait que la résistance ohmique (17) est dépendante de la tension.
9. Enroulement à haute tension suivant l'une des revendications 4 à 7, caractérisé par le fait que la résistance ohmique est constituée par le montage en parallèle d'une résistance (17) qui dépend de la tension, et d'une résistance fixe (16).
10. Enroulement à haute tension suivant les revendications 1, 5 et 8, caractérisé par le fait que le conducteur sans courant (15) représente une bobine montée dans un enroulement normal à deux bobines (figure 6).
EP84115084A 1984-03-12 1984-12-10 Enroulement à haute tension avec distribution du potentiel contraint pour transformateurs Expired EP0154697B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84115084T ATE27381T1 (de) 1984-03-12 1984-12-10 Hochspannungswicklung mit gesteuerter spannungsverteilung fuer transformatoren.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3409004 1984-03-12
DE3409004 1984-03-12
DE3411500 1984-03-28
DE19843411500 DE3411500A1 (de) 1984-03-12 1984-03-28 Hochspannungswicklung mit gesteuerter spannungsverteilung fuer transformatoren

Publications (2)

Publication Number Publication Date
EP0154697A1 EP0154697A1 (fr) 1985-09-18
EP0154697B1 true EP0154697B1 (fr) 1987-05-20

Family

ID=25819250

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84115084A Expired EP0154697B1 (fr) 1984-03-12 1984-12-10 Enroulement à haute tension avec distribution du potentiel contraint pour transformateurs

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EP (1) EP0154697B1 (fr)
BR (1) BR8501064A (fr)
DE (2) DE3411500A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069279B (fr) * 1959-11-19
DE975856C (de) * 1945-01-04 1962-10-31 English Electric Co Ltd Wicklungsanordnung mit Scheibenwicklungen, insbesondere fuer Transformatoren
DE1028677B (de) * 1955-09-12 1958-04-24 Licentia Gmbh Geteilter und hohl ausgebildeter Schirmring fuer Transformatoren hoechster Spannung und Leistung
DE1146191B (de) * 1957-08-05 1963-03-28 Magdalena Jansen Geb Haase Lastumschalter mit veraenderlichen ohmschen UEberschaltwiderstaenden
DE2117422A1 (de) * 1971-04-08 1972-10-12 Schorch Gmbh Regeltransformator mit stoßspan nungsgeschutzter Stufenwicklung
DE2323304C3 (de) * 1973-05-09 1978-09-07 Transformatoren Union Ag, 7000 Stuttgart Stufenwicklung für Transformatoren
DE2328375C3 (de) * 1973-06-04 1978-12-14 Transformatoren Union Ag, 7000 Stuttgart Kondensatorbatterie zur Spannungssteuerung an Wicklungen von Transformatoren und Drosseln

Also Published As

Publication number Publication date
BR8501064A (pt) 1985-10-29
DE3463871D1 (en) 1987-06-25
DE3411500A1 (de) 1985-09-12
EP0154697A1 (fr) 1985-09-18

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