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EP0163907B1 - High-tension transformer winding with regulated voltage distribution - Google Patents

High-tension transformer winding with regulated voltage distribution Download PDF

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Publication number
EP0163907B1
EP0163907B1 EP85104984A EP85104984A EP0163907B1 EP 0163907 B1 EP0163907 B1 EP 0163907B1 EP 85104984 A EP85104984 A EP 85104984A EP 85104984 A EP85104984 A EP 85104984A EP 0163907 B1 EP0163907 B1 EP 0163907B1
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EP
European Patent Office
Prior art keywords
winding
voltage
dependent resistor
parallel connection
direct electrical
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
EP85104984A
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German (de)
French (fr)
Other versions
EP0163907A1 (en
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
Siemens AG
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Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT85104984T priority Critical patent/ATE35478T1/en
Publication of EP0163907A1 publication Critical patent/EP0163907A1/en
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Publication of EP0163907B1 publication Critical patent/EP0163907B1/en
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
    • 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 is therefore based on the object of specifying a circuit for high-voltage windings of transformers and inductors for voltage control and damping of voltage pulses, which is compared to that described in p.g. Solution specified in EP-A-0 078 985 enables a further simplification and a further improvement of the economy for the entire winding structure.
  • the circuit according to the invention is very advantageous, since the wiring of only one or less stressed groups of windings further reduces the effort required to secure a winding arrangement against overloads by voltage pulses, and in particular the space requirement is also reduced.
  • 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, in particular by high-frequency voltage pulses.
  • the voltage-dependent resistor 16 dampens voltage pulses Voltage vibrations 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 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 with the winding part of the undervoltage winding 17, which is located spatially 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 also transmitted to the high-voltage winding 12 and the fine-stage winding 14 by the close inductive and capacitive coupling.
  • inventive circuitry of groups of windings which are subject to high electrical stress, which represent winding parts, is 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 due to uneven voltage distribution.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)

Description

Die Erfindung betrifft eine Hochspannungswicklung für Transformatoren mit großer Nennleistung und mit einer Vielzahl von Gruppen von Windungen in Scheibenspulen und/oder Wicklungslagen und mit unter Mitwirkung von spannungsabhängigen Widerständen gesteuerter Verteilung der von Spannungsimpulsen verursachten Spannungen auf die einzelnen Gruppen von Windungen und geht vom Stand der Technik nach der EP-A-0 078 985 aus.The invention relates to a high-voltage winding for transformers with a large nominal 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, and proceeds from the prior art according to EP-A-0 078 985.

Beim Auftreffen von Spannungsimpulsen, beispielsweise von Blitz- oder Schaltspannungsimpulsen auf Wicklungen von Transformatoren, treten in deren Wicklungen Spannungsschwingungen auf. Entspricht die Frequenz der auftreffenden Impulse der Eigenfrequenz einer der Wicklungen, so sind in Folge Resonanzanregung der Wicklungen die entstehenden Amplituden und Gradienten der resonanzfrequenten Spannungsverteilung um so höher je geringer die wirksame Wicklungsdämpfung ist. Die bei Resonanzanregung auftretenden hohen Amplituden und großen Gradienten sind unerwünscht. Diese hohen Amplituden und großen Gradienten werden durch die Maßnahmen gemäß der oben genannten EP-A-0 078 985 zwar wirksam verringert, jedoch ist hierbei immernoch ein verhältnismäßig großer Aufwand erforderlich.When voltage pulses, for example lightning or switching voltage pulses, strike the windings of transformers, voltage oscillations occur in their windings. If the frequency of the impinging pulses corresponds to the natural frequency of one of the windings, as a result of resonance excitation of the windings, the resulting amplitudes and gradients of the resonance-frequency voltage distribution are higher, the lower the effective winding damping. The high amplitudes and large gradients that occur with resonance excitation are undesirable. Although these high amplitudes and large gradients are effectively reduced by the measures according to the above-mentioned EP-A-0 078 985, a relatively large amount of effort is still required.

Der Erfindung liegt daher die Aufgabe zugrunde, für Hochspannungswicklungen von Transformatoren und Drosselspulen zur Spannungssteuerung und Dämpfung von Spannungsimpulsen eine Beschaltung anzugeben, die gegenüber der in der p.g. EP-A-0 078 985 angegebenen Lösung eine weitere Vereinfachung sowie eine weitere Verbesserung der Wirtschaftlichkeit für den gesamten Wicklungsaufbau ermöglicht.The invention is therefore based on the object of specifying a circuit for high-voltage windings of transformers and inductors for voltage control and damping of voltage pulses, which is compared to that described in p.g. Solution specified in EP-A-0 078 985 enables a further simplification and a further improvement of the economy for the entire winding structure.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß lediglich der beim Auftreffen von Spannungsimpulsen auf die Wicklung am stärksten belasteten Gruppe von Windungen ein spannungsabhängiger Widerstand direkt elektrisch parallel geschaltet ist.This object is achieved according to the invention in that only the group of windings which is most heavily loaded when voltage pulses impinge on the winding has a voltage-dependent resistor connected directly electrically in parallel.

Gemäß vorteilhaften Ausgestaltungen der Erfindung ist bei einer Wicklungsanordnung mit zwei ineinanderge Wickelten Wickelleitersträngen in einer als Lagenwicklung ausgeführten Grobstufenwicklung lediglich einem der beiden ineinandergewickelten Wickelleitersträngen ein spannungsabhängiger Widerstand direkt elektrisch parallel geschaltet oder ist in einer Anordnung mit einer zweilagigen Grobstufenwicklung lediglich einer Wicklungslage der Grobstufenwicklung ein spannungsabhängiger Widerstand direkt elektrisch parallel geschaltet. Bei zweilagigen Feinstufenwicklungen ist ebenfalls nur einer Wicklungslage der Feinstufenwicklung ein spannungsabhängiger Widerstand direkt elektrisch parallel geschaltet. Gemäß einer anderen, ebenfalls sehr vorteilhaften Weiterbildung der Erfindung, ist bei Ausführung einer Wicklungsanordnung mit einer ineinandergewickelten Feinstufenwicklung und Aufteilung derselben in Wicklungsabschnitte mit je einer oder mehreren Feinstufen lediglich jedem zweiten Wicklungsabschnitt oder jedem zweiten Gang jedes Wicklungsabschnittes ein spannungsabhängiger Widerstand direkt elektrisch parallel geschaltet.According to advantageous embodiments of the invention, in a winding arrangement with two interwoven winding conductor strands in a coarse step winding designed as a layer winding, only one of the two interwoven winding conductor strings has a voltage-dependent resistor connected directly in parallel or is in an arrangement with a two-layer coarse step winding only one winding position of the coarse step winding a voltage-dependent resistor directly electrically connected in parallel. In the case of two-layer fine-stage windings, a voltage-dependent resistor is also directly electrically connected in parallel to only one winding layer of the fine-stage winding. According to another, also very advantageous development of the invention, when executing a winding arrangement with an interwoven fine-stage winding and dividing it into winding sections with one or more fine stages each, only every second winding section or every second gear of each winding section is electrically electrically connected in parallel.

Eine weitere erfindungsgemäße Lösungsmöglichkeit besteht bei doppelkonzentrischen Anordnungen der Unterspannungs- Mittelspannungs- und Oberspannungswicklung darin, daß lediglich einem Teil der Wicklung ein spannungsabhängiger Widerstand direkt elektrisch parallel geschaltet ist.Another possible solution according to the invention in double-concentric arrangements of the undervoltage, medium-voltage and high-voltage winding is that only part of the winding has a voltage-dependent resistor connected directly electrically in parallel.

Die erfindungsgemäße Schaltung ist sehr vorteilhaft, denn durch die Beschaltung lediglich einer bzw. weniger beanspruchter Gruppen von Windungen ist der zur Sicherung einer Wicklungsanordnung gegen Überlastungen durch Spannungsimpulse erforderliche Aufwand weiter reduziert, wobei insbesondere auch der Raumbedarf verringert ist.The circuit according to the invention is very advantageous, since the wiring of only one or less stressed groups of windings further reduces the effort required to secure a winding arrangement against overloads by voltage pulses, and in particular the space requirement is also reduced.

Einige Ausführungsbeispiele der Erfindung werden anhand einer Zeichnung näher erläutert. Es zeigen:

  • Fig. 1 und 2 Schaltungsanordnungen mit einer beschalteten Grobstufenwicklung,
  • Fig. 3 und 4 Schaltungsanordnungen mit einer beschalteten Feinstufenwicklung und
  • Fig. 5 eine doppelkonzentrische Anordnung von Unterspannungs- und Oberspannungswicklung mit beschalteter Unterspannungswicklung.
Some embodiments of the invention are explained in more detail with reference to a drawing. Show it:
  • 1 and 2 circuit arrangements with a connected coarse step winding,
  • 3 and 4 circuit arrangements with a wired fine stage winding and
  • Fig. 5 shows a double-concentric arrangement of undervoltage and high-voltage winding with connected undervoltage winding.

Einander entsprechende Schaltelemente sind in allen Figuren mit gleichen Bezugszeichen versehen.Corresponding switching elements are provided with the same reference symbols in all figures.

Um einen nicht dargestellten Eisenkern sind konzentrisch zueinander, derselben Phase zugeordnet, eine Unterspannungswicklung 17, eine Oberspannungswicklung 12, eine Grobstufenwicklung 13 sowie eine Feinstufenwicklung 14 mit Anzapfungen 1 bis 11 angeordnet. Die Grobstufenwicklung 13 und die Feinstufenwicklung 14 sind mit der Oberspannungswicklung 12 elektrisch in Reihe geschaltet und die Feinstufenwicklung 14 liegt über einen Stufenschalter 15 an dem Sternpunkt bzw. an Erdpotential.An undervoltage winding 17, an high-voltage winding 12, a coarse-stage winding 13 and a fine-stage winding 14 with taps 1 to 11 are arranged concentrically to one another, the same phase, around an iron core (not shown). 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 connected to the star point or to ground potential via a step switch 15.

Bei der Anordnung gemäß Fig. 1 ist die Grobstufenwicklung 13 als einlagige Wicklung mit zwei ineinandergewickelten Wickelleitersträngen ausgebildet. Einem Wickelleiterstrang ist ein spannungsabhängiger Widerstand 16 parallel geschaltet. Dieser spannungsabhängige Widerstand 16 begrenzt die in der Grobstufenwicklung 13 auftretende Spannung, insbesondere durch hochfrequente Spannungsimpulse, in die Grobstufenwicklung 13 induzierte Spannungen. Zusätzlich dämpft der spannungsabhängige Widerstand 16 durch Spannungsimpulse angeregte Spannungsschwingungen in elektrisch gekoppelten Wicklungen.In the arrangement according to FIG. 1, 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, in particular by high-frequency voltage pulses. In addition, the voltage-dependent resistor 16 dampens voltage pulses Voltage vibrations in electrically coupled windings.

Bei der Anordnung gemäß Fig. 2 ist die Grobstufenwicklung 13 als zweilagige Wicklung ausgeführt und der spannungsabhängige Widerstand 16 ist einer Wicklungslage parallel geschaltet.In the arrangement according to FIG. 2, 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.

Bei der Anordnung gemäß Fig. 3 ist die Feinstufenwicklung 14 in Wicklungsabschnitte unterteilt, deren jeder aus zwei ineinandergewickelten Wickelleitersträngen besteht. Jeweils einem Wickelleiterstrang in jedem Wicklungsabschnitt ist ein spannungsabhängiger Widerstand 16 parallel geschaltet.3, 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.

Die Anordnung gemäß Fig. 4 ist wickeltechnisch genauso aufgebaut wie die Anordnung gemäß Fig. 3, jedoch ist hier jedem zweiten der aus je zwei Wickelleitersträngen gewickelten Wicklungsabschnitte ein spannungsabhängiger Widerstand 16 parallel geschaltet,In terms of winding technology, the arrangement according to FIG. 4 is constructed in exactly the same way as the arrangement according to FIG. 3, but here a voltage-dependent resistor 16 is connected in parallel to every second winding section wound from two winding conductor strands,

Die Funktion der spannungsabhängigen Widerstände 16 entsprechen in den Anordnungen gemäß der Figuren 2, 3 und 4 der in der Anordnung gemäß Fig. 1. In jedem Fall wird also der Spannungsanstieg in dem beschalteten Wicklungsteil begrenzt und werden Spannungsschwingungen in den elektrisch gekoppelten Wicklungsteilen gedämpft.The function of the voltage-dependent resistors 16 in the arrangements according to FIGS. 2, 3 and 4 corresponds to that in the arrangement according to FIG. 1. In any case, the voltage rise in the connected winding part is limited and voltage oscillations in the electrically coupled winding parts are damped.

Bei der Anordnung gemäß Fig. 5 ist die Unterspannungswicklung 17 aus zwei elektrisch in Reihe liegenden Wicklungsteilen aufgebaut. Eines dieser Wicklungsteile ist räumlich zwischen der Oberspannungswicklung 12 und der Feinstufenwicklung 14 angeordnet. Eine Grobstufenwicklung 13 ist in diesem Ausführungsbeispiel nicht vorgesehen. Dem räumlich zwischen der Oberspannungswicklung 12 und der Feinstufenwicklung 14 liegenden Wicklungsteil der Unterspannungswicklung 17 ist ein spannungsabhängiger Widerstand 16 parallel geschaltet. Dieser begrenzt wiederum die Spannung in dem beschalteten Wicklungsteil und dämpft Spannungsschwingungen in allen elektrisch gekoppelten Wicklungen und Wicklungsteilen. Diese begrenzende und dämpfende Wirkung des spannungsabhängigen Widerstandes 16 wird durch die enge induktive und kapazitive Kopplung mit der Oberspannungswicklung 12 und der Feinstufenwicklung 14 auch auf diese übertragen.In the arrangement according to FIG. 5, 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 with the winding part of the undervoltage winding 17, which is located spatially 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 also transmitted to the high-voltage winding 12 and the fine-stage winding 14 by the close inductive and capacitive coupling.

Die erfindungsgemäße Beschaltung von elektrisch hochbelasteten Gruppen von Windungen, die Wicklungsteile darstellen, ist nicht nur bei den genannten Ausführungsbeispielen vorteilhaft, sondern immer dann zweckmäßig, wenn innerhalb einer Wicklungsanordnung durch ungleiche Spannnungsverteilung Teile der Wicklung durch elektrische Spannung deutlich höher beansprucht sind als andere Teile.The inventive circuitry of groups of windings which are subject to high electrical stress, which represent winding parts, is 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 due to uneven voltage distribution.

Claims (6)

1. High voltage winding for transformers with a high nominal capacity and having a plurality of groups of turns in disc coils and/or winding layers and with distribution of the voltages caused by voltage pulses to the groups of turns under the control of voltage-dependent resistors, with a voltage-dependent resistor in direct electrical parallel connection with one or several groups of turns, characterised in that a voltage-dependent resistor is in direct electrical parallel connection only with the group of turns with the greatest load when voltage pulses hit the winding.
2. High voltage winding according to claim 1, characterised in that a voltage-dependent resistor is in direct electrical parallel connection only with one of two interwound winding conductor lines of a coarse step winding constructed as a multi-layer winding (Fig. 1).
3. High voltage winding according to claim 1, characterised in that in embodiments with a two- layer coarse step winding a voltage-dependent resistor is in direct electrical parallel connection with only one winding layer of the coarse step winding (Fig. 2).
4. High voltage winding according to claim 1, characterised in that in embodiments with a two- layer fine step winding a voltage-dependent resistor is in direct electrical parallel connection with only one winding layer of the fine step winding.
5. High voltage winding according to claim 1, characterised in that in embodiments with an interwound fine step winding and division of the same into winding sections each with one or several fine steps, a voltage-dependent resistor is in direct electrical parallel connection only with every second winding section or with every second convolution of each winding section (Fig. 3 and 4).
6. High voltage winding according to claim 1, characterised in that in a double concentric arrangement of the high voltage winding and the low voltage winding a voltage-dependent resistor is in direct electrical parallel connection with only one part of the winding (Fig. 5).
EP85104984A 1984-05-04 1985-04-24 High-tension transformer winding with regulated voltage distribution Expired EP0163907B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85104984T ATE35478T1 (en) 1984-05-04 1985-04-24 HIGH VOLTAGE WINDING WITH CONTROLLED VOLTAGE DISTRIBUTION FOR TRANSFORMERS.

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 EP0163907A1 (en) 1985-12-11
EP0163907B1 true EP0163907B1 (en) 1988-06-29

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ID=27191941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85104984A Expired EP0163907B1 (en) 1984-05-04 1985-04-24 High-tension transformer winding with regulated voltage distribution

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EP (1) EP0163907B1 (en)
BR (1) BR8502112A (en)
DE (1) DE3563575D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0383988A1 (en) * 1989-02-20 1990-08-29 Siemens Aktiengesellschaft High-voltage lead-through for oil-cooled electric devices

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3908841A1 (en) * 1989-03-17 1990-09-20 Siemens Ag ARRANGEMENT FOR DAMPING HIGH FREQUENCY VIBRATIONS OF AN ELECTRICAL VOLTAGE
DE19824606C2 (en) * 1998-06-02 2001-02-08 Siemens Ag Device for limiting overvoltages for transformers
CN110783081A (en) * 2019-11-14 2020-02-11 中车大连机车车辆有限公司 Locomotive, traction transformer and overvoltage protection method thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1638596A1 (en) * 1967-08-18 1971-08-26 Siemens Ag High-voltage tube winding for transformers and chokes from interwoven disc pulses
DE2421728A1 (en) * 1974-05-04 1975-11-13 Transformatoren Union Ag Transformer over-voltage protection - for winding sections involves voltage-dependent resistors and oil spark gaps
FR2386175A1 (en) * 1977-04-01 1978-10-27 Alsthom Cgee Line overvoltage protection for electrical device - has symmetrical variable resistors coupled to isolating transformer secondary
DE2720348A1 (en) * 1977-05-06 1978-11-16 Reinhausen Maschf Scheubeck STEPPING TRANSFORMER WITH STEPPING DEVICE AND WITH VOLTAGE-DEPENDENT RESISTORS
ES516519A1 (en) * 1981-11-09 1983-08-01 Gen Electric Internal voltage grading and transient voltage protection for power transformer windings.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0383988A1 (en) * 1989-02-20 1990-08-29 Siemens Aktiengesellschaft High-voltage lead-through for oil-cooled electric devices

Also Published As

Publication number Publication date
DE3563575D1 (en) 1988-08-04
EP0163907A1 (en) 1985-12-11
BR8502112A (en) 1985-12-31

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