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EP0163907A1 - Enroulement haute tension à répartition de tension réglée pour transformateurs - Google Patents

Enroulement haute tension à répartition de tension réglée pour transformateurs Download PDF

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Publication number
EP0163907A1
EP0163907A1 EP85104984A EP85104984A EP0163907A1 EP 0163907 A1 EP0163907 A1 EP 0163907A1 EP 85104984 A EP85104984 A EP 85104984A EP 85104984 A EP85104984 A EP 85104984A EP 0163907 A1 EP0163907 A1 EP 0163907A1
Authority
EP
European Patent Office
Prior art keywords
winding
voltage
parallel
dependent resistor
windings
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
EP85104984A
Other languages
German (de)
English (en)
Other versions
EP0163907B1 (fr
Inventor
Günther Bonni
Donald Dr. Dipl.-Ing. Brandes
Gerhard Dipl.-Ing. Döll
Wolfgang Dr. Dipl.-Ing. Knorr
Walter Dr. Dipl.-Ing. Müller
Alfred Dipl.-Ing. Süppel (FH)
Helmut Dipl.-Ing. Feyertag
Erwin Dipl.-Ing. Hager (Fh)
Leo Janner
Wilfried Dipl.-Ing. Peschke
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 AT85104984T priority Critical patent/ATE35478T1/de
Publication of EP0163907A1 publication Critical patent/EP0163907A1/fr
Application granted granted Critical
Publication of EP0163907B1 publication Critical patent/EP0163907B1/fr
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
    • 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

Definitions

  • the invention relates to a high-voltage winding for transformers with a large rated power and with a large number of groups of windings in disc coils and / or winding layers and with distribution of the voltages caused by voltage pulses to the individual groups of windings controlled with the aid of voltage-dependent resistors.
  • a capacitor bank has become known from DE-OS 23 28 375, the individual capacitors of which winding sections assigned to them are connected in parallel.
  • the capacitor banks are arranged spatially next to the transformer windings and are therefore not linked to the flux passing through the high-voltage windings.
  • the capacitor batteries therefore ensure a good distribution of impacts on the transformer winding emitting surge voltages, but on the other hand cause only minimal or no damping of vibrations in the windings which are excited by switching voltage.
  • Transformer windings provided with control conductors behave similarly in accordance with DE-AS 10 69 279, DE-OS 24 18 230 and DE-OS 23 23 304. These known winding arrangements show from disc coils with wrapped control conductors, or from winding layers with 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.
  • the European application 84 115 084.0 has recently proposed to improve the effectiveness of these control conductors capacitively coupled to the winding by wiring with resistors, for example voltage-dependent resistors.
  • the control conductors and the resistors form capacitive RC elements coupled to the winding. Although these RC elements have a very good damping effect, overall they require a not inconsiderable effort and increase the dimensions of the winding.
  • the invention is therefore based on the object of specifying a circuit for windings of transformers and choke coils for voltage control and damping of voltage pulses which, with the same effectiveness as known solutions, is simpler and more economical than these.
  • a voltage-dependent resistor is connected directly electrically in parallel and, in addition to a voltage limitation in the group of windings lying in parallel, a damping of the vibrations excited by voltage pulses in forces the groups that are electrically in line with it.
  • a voltage-dependent resistor is connected in parallel in a main winding made up of disc coils to a first, possibly one in the middle of the winding and a last group of coils, or that in a main winding designed as a layer winding, the input layers each have a voltage-dependent one Resistor is connected in parallel.
  • a voltage-dependent resistor is also connected in parallel in a winding arrangement with a coarse step winding, in that, in an embodiment with two interwoven winding conductor strands in a coarse step winding designed as a layer winding, only one of the two interwoven winding conductor strands has a voltage-dependent resistor directly electrically is connected in parallel or in that in a configuration with a two-layer coarse step winding, only one winding layer of the coarse step winding, a voltage-dependent resistor is connected directly electrically in parallel.
  • a voltage-dependent resistor is connected in parallel in a winding arrangement with a fine-stage winding of at least one stage, preferably the stage immediately following the coarse-stage winding or the main winding.
  • a voltage-dependent resistor is also directly electrically connected in parallel to only one winding layer of the fine-stage winding.
  • the wiring of windings according to the invention is advantageous because the design of the winding is of secondary importance, since both drop windings and nested or non-nested disc coil windings are improved in their voltage behavior by the wiring according to the invention with a voltage-dependent resistor.
  • the particular advantage of the circuitry according to the invention in all these cases is a reduction in the complexity, in particular for the internal insulation of the winding, in the possibility of using simpler circuit types up to comparatively higher nominal voltages and in their frequency-independent effectiveness.
  • a winding arrangement with an high-voltage winding 12 made of disc coils 19 is provided.
  • the disc coils 19 are connected in pairs to form double coils.
  • the main winding is connected to a high-voltage input 20 on the network side.
  • the other end of the high-voltage winding 12 is electrically connected in series via a diversion 21 to a single-layer coarse-stage winding 13, to which a likewise single-layer fine-stage winding 14 is connected in a further series connection via a diversion 22.
  • the fine-stage winding 14 for example, four spatially parallel winding conductors are wound into one another, which are connected in series with one another via diversions 23 and are connected to selector contacts 1 to 5.
  • a selector 15 usually connects the required one of the selector contacts 1 to 5 to the star point of the network or to earth potential.
  • the interconnected winding parts are wired with voltage-dependent resistors 16, so that the stresses on the winding parts by surge voltages, switching voltages and resonance-frequency overvoltages in the respectively wired winding part are limited and also the vibration amplitudes in the adjacent, non-wired winding parts due to the damping effect of the resistors 16 are reduced.
  • This damping effect results from the fact that the winding parts connected to the voltage-dependent resistors 16 are inductively coupled to the non-connected winding parts.
  • the coarse-stage winding lying in series with the main winding and the fine-stage winding are likewise connected to voltage-dependent resistors 16.
  • the parallel connection in the fine step winding 14 is limited to the fact that the voltage-dependent resistor 16 is only connected in parallel to the step winding following the coarse step winding 13.
  • an operating alternating voltage is also present at the voltage-dependent resistors 16 in the normal, undisturbed operating state.
  • the resistance value of the voltage-dependent resistors 16 is so large that on the one hand the current flowing parallel to the winding parts is negligibly small and on the other hand the losses in the resistors 16 are so low that the thermal stability over the life of the transformer ensures with great certainty is.
  • an undervoltage winding 17, a high-voltage winding 12, a coarse-stage winding 13 and a fine-stage winding 14 with taps 1 to 11 are arranged around an iron core (not shown) concentrically with one another and in the same phase.
  • the coarse step winding 13 and the fine step winding 14 are electrically connected in series with the high voltage winding 12 and the fine step winding 14 is in turn connected to the star point or to ground potential via a step switch 15.
  • the coarse step winding 13 is designed as a single-layer winding with two interwoven winding conductor strands.
  • a voltage-dependent resistor 16 is connected in parallel to a winding conductor strand. This voltage-dependent resistor 16 limits the voltage occurring in the coarse step winding 13, in particular voltages induced in the coarse step winding 13 by high-frequency voltage pulses. In addition, the voltage-dependent resistor 16 dampens voltage oscillations excited by voltage pulses in electrically coupled windings.
  • the coarse step winding 13 is designed as a two-layer winding and the voltage-dependent resistor 16 is connected in parallel with one winding layer.
  • the fine stage winding 14 is divided into winding sections, each of which consists of two interwoven winding conductor strands.
  • a voltage-dependent resistor 16 is connected in parallel to one winding conductor strand in each winding section.
  • the arrangement according to FIG. 5 is constructed in exactly the same way as the arrangement according to FIG. 4, but here a voltage-dependent resistor 16 is connected in parallel to every second winding section wound from two winding conductor strands.
  • the function of the voltage-dependent resistors 16 in the arrangements according to FIGS. 2, 3, 4 and 5 corresponds to that in the arrangement according to FIG. 1.
  • the voltage rise in the connected winding part is limited and voltage oscillations in the electrically and magnetically coupled ones Damped winding parts.
  • the undervoltage winding 17 is constructed from two winding parts which are electrically connected in series. One of these winding parts is arranged spatially between the high-voltage winding 12 and the fine-stage winding 14. A coarse step winding 13 is not provided in this embodiment.
  • a voltage-dependent resistor 16 is connected in parallel to the winding part of the undervoltage winding 17 which is spatially located between the high-voltage winding 12 and the fine-stage winding 14. This in turn limits the voltage in the connected winding part and dampens voltage vibrations in all electrically coupled windings and winding parts. This limiting and damping effect of the voltage-dependent resistor 16 is due to the close inductive and capacitive coupling with the High-voltage winding 12 and the fine stage winding 14 also transferred to this.
  • the switching of the winding is of secondary importance for the effect of the wiring. With different winding designs, there are only gradual differences. Both a drop winding and a nested disc coil winding can be improved in their voltage behavior by wiring. The same applies to the known layer winding circuits.
  • the advantage in any case lies in a reduction of the effort for the internal insulation of the winding in a possibly selectable, simpler type of circuit even with higher nominal voltages and in the frequency independence.
  • inventive circuitry of groups of windings which are subject to high electrical stress, which represent winding parts, is therefore not only advantageous in the exemplary embodiments mentioned, but is also expedient if, within a winding arrangement, parts of the winding are stressed by electrical voltage significantly more than other parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP85104984A 1984-05-04 1985-04-24 Enroulement haute tension à répartition de tension réglée pour transformateurs Expired EP0163907B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85104984T ATE35478T1 (de) 1984-05-04 1985-04-24 Hochspannungswicklung mit gesteuerter spannungsverteilung fuer transformatoren.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE3416558 1984-05-04
DE3416558 1984-05-04
DE3429065 1984-08-07
DE3429065 1984-08-07
DE3429770 1984-08-13
DE3429770 1984-08-13

Publications (2)

Publication Number Publication Date
EP0163907A1 true EP0163907A1 (fr) 1985-12-11
EP0163907B1 EP0163907B1 (fr) 1988-06-29

Family

ID=27191941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85104984A Expired EP0163907B1 (fr) 1984-05-04 1985-04-24 Enroulement haute tension à répartition de tension réglée pour transformateurs

Country Status (3)

Country Link
EP (1) EP0163907B1 (fr)
BR (1) BR8502112A (fr)
DE (1) DE3563575D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3908841A1 (de) * 1989-03-17 1990-09-20 Siemens Ag Anordnung zur daempfung hochfrequenter schwingungen einer elektrischen spannung
DE19824606A1 (de) * 1998-06-02 1999-12-16 Siemens Ag Vorrichtung zur Begrenzung von Überspannungen für Transformatoren
CN110783081A (zh) * 2019-11-14 2020-02-11 中车大连机车车辆有限公司 一种机车、牵引变压器及其过电压保护方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE93081T1 (de) * 1989-02-20 1993-08-15 Siemens Ag Hochspannungsdurchfuehrung fuer oelgekuehlte elektrische geraete.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1638596A1 (de) * 1967-08-18 1971-08-26 Siemens Ag Hochspannungsroehrenwicklung fuer Transformatoren und Drosseln aus ineinandergewickelten Scheibenpulsen
DE2421728A1 (de) * 1974-05-04 1975-11-13 Transformatoren Union Ag Transformator mit einer ueberspannungsschutzeinrichtung
FR2386175A1 (fr) * 1977-04-01 1978-10-27 Alsthom Cgee Dispositif de protection des installations contre les surtensions, notamment dues a la foudre
DE2720348A1 (de) * 1977-05-06 1978-11-16 Reinhausen Maschf Scheubeck Stufentransformator mit stufenschaltvorrichtung und mit spannungsabhaengigen widerstaenden
EP0078985A1 (fr) * 1981-11-09 1983-05-18 General Electric Company Répartition de la tension à travers l'enroulement et protection des enroulements de transformateurs de puissance contre des tensions transitoires

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1638596A1 (de) * 1967-08-18 1971-08-26 Siemens Ag Hochspannungsroehrenwicklung fuer Transformatoren und Drosseln aus ineinandergewickelten Scheibenpulsen
DE2421728A1 (de) * 1974-05-04 1975-11-13 Transformatoren Union Ag Transformator mit einer ueberspannungsschutzeinrichtung
FR2386175A1 (fr) * 1977-04-01 1978-10-27 Alsthom Cgee Dispositif de protection des installations contre les surtensions, notamment dues a la foudre
DE2720348A1 (de) * 1977-05-06 1978-11-16 Reinhausen Maschf Scheubeck Stufentransformator mit stufenschaltvorrichtung und mit spannungsabhaengigen widerstaenden
EP0078985A1 (fr) * 1981-11-09 1983-05-18 General Electric Company Répartition de la tension à travers l'enroulement et protection des enroulements de transformateurs de puissance contre des tensions transitoires

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 5, Nr. 7 (E-41)(679), 17. Januar 1981; & JP-A-55 138 214 (TOKYO SHIBAURA DENKI K.K.) 28.10.1980 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3908841A1 (de) * 1989-03-17 1990-09-20 Siemens Ag Anordnung zur daempfung hochfrequenter schwingungen einer elektrischen spannung
DE19824606A1 (de) * 1998-06-02 1999-12-16 Siemens Ag Vorrichtung zur Begrenzung von Überspannungen für Transformatoren
DE19824606C2 (de) * 1998-06-02 2001-02-08 Siemens Ag Vorrichtung zur Begrenzung von Überspannungen für Transformatoren
CN110783081A (zh) * 2019-11-14 2020-02-11 中车大连机车车辆有限公司 一种机车、牵引变压器及其过电压保护方法

Also Published As

Publication number Publication date
DE3563575D1 (en) 1988-08-04
EP0163907B1 (fr) 1988-06-29
BR8502112A (pt) 1985-12-31

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