EP0088934A1 - Disc coil winding with interleaved singular or double coils - Google Patents

Disc coil winding with interleaved singular or double coils Download PDF

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Publication number
EP0088934A1
EP0088934A1 EP83101958A EP83101958A EP0088934A1 EP 0088934 A1 EP0088934 A1 EP 0088934A1 EP 83101958 A EP83101958 A EP 83101958A EP 83101958 A EP83101958 A EP 83101958A EP 0088934 A1 EP0088934 A1 EP 0088934A1
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EP
European Patent Office
Prior art keywords
winding
additional insulation
insulation
coils
turns
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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.)
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EP83101958A
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German (de)
French (fr)
Inventor
Gottfried Broszat
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Transformatoren Union AG
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Transformatoren Union AG
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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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • 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 inter-wound coils with reinforced, insulated outer surface in the entrance area, in which at least two turns on the inner and outer edge are additionally insulated from one another in such a way that one edge is angularly encompassed by this additional insulation and that the winding capacity between turns with normal insulation is higher than between turns with additional insulation.
  • the field strength in the most highly stressed oil gussets between edge and neighboring turns is shifted away from the conductor by means of cladding with solid insulation, and thereby reaches the order of magnitude of the field strength at the reinforced insulated edges on the outer surface.
  • the form rings used here for example with a U or L-shaped cross section, represent a relatively high outlay which is justified only for very high stresses. This also applies if the shaped rings are made by additional covering of the winding conductors with insulating paper and surround the edge conductors on all sides.
  • the load on the edge insulation on the outer surface of the winding can be lower than the load from the voltage between adjacent turns, even in high-voltage windings without reinforced insulated outer surfaces.
  • the additional insulation a great security against longitudinal arcing as well as against the security achieved by the normal insulation of the conductor against breakdowns between adjacent turns.
  • the construction of the additional insulation from shaped rings is relatively more complex than in the case of windings with reinforced, insulated jacket surfaces.
  • the invention is therefore based on the object of specifying an arrangement and design of disc coils for high-voltage windings from disc coils in transformers with and without reinforced insulation of the winding outer surfaces, in which the security of the insulation against longitudinal flashovers across several disc coils is approximately equal to the safety of the winding and the coil insulation against breakthroughs, without requiring any significant additional effort.
  • this object is achieved for a disk coil winding according to the type mentioned at the outset in that the additional insulation is reduced to a spacer which is approximately rectangular in cross section, which lies radially between the turns to be additionally insulated and whose width in the axial direction is equal to the corresponding width of that covered with normal insulation Winding conductor is.
  • the sum of the radial dimensions of the additional insulations per disk coil is equal to the radial thickness of the normally insulated winding conductor or an integral multiple thereof.
  • the metal spacing of the radially adjacent turns produced by the additional insulation in the disk coils remote from the high-voltage input of the winding decreases in accordance with the decreasing impact loads.
  • the additional insulation consists of insulating strips or cooling channel strips or a combination of these forms, a graduated insulation being produced on which the field strengths in the oil at the coil edges and between the turns are approximately the same in the event of surge voltage stresses.
  • the design of the winding according to the invention is very advantageous because, by simplification, it ensures economical design and use of the additional insulation required in special cases.
  • interwoven disc coils are wound from two simultaneously and spatially parallel winding conductors, the windings 1 through n of which the load current flows through in the order of the digits entered.
  • Additional insulations 71 to 73 serve to avoid the critical of these pre-discharges and to improve the dielectric strength of the high-voltage winding constructed from disc coils, the radial strength of which decreases with increasing reference symbols. By arranging these additional insulations, the safety of the insulations between adjacent turns, between adjacent disc coils, and the voltage Strength harmonized and optimized between disc coils that are further apart.
  • FIG. 7 shows a further exemplary embodiment with disk-shaped additional insulations 74, in which the corners facing the outer surfaces of the disk coils are also insulated by angles 75 and in which the disk-shaped additional insulations 74 simultaneously have the function of shims.
  • the additional insulations 71 to 74 arranged radially between adjacent turns reduce in particular the field strength of the electric field in oil gussets formed by adjacent winding conductor edges and thereby ensure that oil is in these Use possible pre-discharges only at significantly higher voltage loads and, due to the unchanged normal insulation of the winding conductors, nevertheless enable the same to be cooled practically unchanged.
  • the number of turns is increased in disk coils, which require fewer additional insulations 71 to 73 due to their distance from the high-voltage input and whose radial dimensions are smaller than in disk coils with very strong additional insulation 71 to 73.
  • the effect of the invention is based on the knowledge that corresponding points, where there are prerequisites for longitudinal rollover, are not shown on any of the coils wound into one another, in particular in the exemplary embodiments according to FIGS. 1 to 5 Job.
  • the winding cross section shown in FIG. 6 is a circumferential location of the arrangement according to FIG. 5, not shown, but is otherwise identical to the winding cross section shown in FIG. 5.

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

Abstract

In derartigen Wicklungen treten innerhalb einzelner Scheibenspulen, insbesondere in von deren Randwindungen eingeschlossenen Ölzwickeln hohe elektrische Feldstärken auf. Zur Minderung dieser hohen elektrischen Feldstärken ist vorgeschlagen worden, im Wicklungseingangsbereich mindestens je zwei Windungen in jeder Scheibenspule am Innen- und Außenrand gegeneinander zusätzlich so zu isolieren, daß eine Wickelleiterkante durch diese Zusatzisolierung winkelförmig umfaßt ist und daß die Windungskapazität zwischen Windungen mit Normalisolierung höher ist als zwischen Windungen mit Zusatzisolierung. Erfindungsgemäß wird vorgeschlagen, die Zusatzisolierung (71-73) auf einen im Querschnitt etwa rechteckigen Streifen zu reduzieren, der radial zwischen den zusätzlich zu isolierenden Windungen liegt und dessen Breite in Achsrichtung gleich der entsprechenden Breite des mit Normalisolierung belegten Wickelleiters ist. Die erfindungsgemäße Gestaltung der Zusatzisolierung gewährleistet eine wirtschaftliche und einfache Fertigung von hochspannungsbelasteten Scheibenspulenwicklungen auch im Nennspannungsbereich um 400 kV, und bewirkt eine weitere Erhöhung der Betriebssicherheit in diesen Scheibenspulenwicklungen.In such windings, high electric field strengths occur within individual disk coils, especially in oil gussets enclosed by their edge windings. To reduce these high electric field strengths, it has been proposed to additionally isolate at least two turns in each winding coil in the winding input area on the inside and outside edge in such a way that a winding conductor edge is angularly covered by this additional insulation and that the winding capacity between turns with normal insulation is higher than between turns with additional insulation. According to the invention, it is proposed to reduce the additional insulation (71-73) to a strip which is approximately rectangular in cross section and which lies radially between the turns to be additionally insulated and whose width in the axial direction is equal to the corresponding width of the winding conductor covered with normal insulation. The design of the additional insulation according to the invention ensures economical and simple production of high-voltage-loaded disk coil windings even in the nominal voltage range around 400 kV, and brings about a further increase in operational reliability in these disk coil windings.

Description

Die Erfindung betrifft ineinandergewickelte Spulen mit verstärkt isolierter Mantelfläche im Eingangsbereich, bei denen zusätzlich mindestens je zwei Windungen am Innen- und Außenrand gegeneinander zusätzlich so isoliert sind, daß eine Kante durch diese Zusatzisolierung winkelförmig umfaßt ist und daß die Windungskapazität zwischen Windungen mit Normalisolierung höher ist als zwischen Windungen mit Zusatzisolierung.The invention relates to inter-wound coils with reinforced, insulated outer surface in the entrance area, in which at least two turns on the inner and outer edge are additionally insulated from one another in such a way that one edge is angularly encompassed by this additional insulation and that the winding capacity between turns with normal insulation is higher than between turns with additional insulation.

Durch diese Anordnung ist die Feldstärke in den am höchsten beanspruchten Ölzwickeln zwischen Rand- und Nachbarwindungen durch Verkleidung mit fester Isolierung vom Leiter weg verschoben und erreicht dabei die Größenordnung der Feldstärke an den verstärkt isolierten Kanten an der Mantelfläche. Die hierbei eingesetzten Formringe, beispielsweise mit U- oder L-förmigem Querschnitt, stellen einen verhältnismäßig hohen Aufwand dar, der nur für sehr hohe Spannungen gerechtfertigt ist. Dies gilt auch dann, wenn die Formringe durch zusätzliche Ummantelung der Wickelleiter mit Isolierpapier hergestellt sind und die Randleiter allseitig umgeben.As a result of this arrangement, the field strength in the most highly stressed oil gussets between edge and neighboring turns is shifted away from the conductor by means of cladding with solid insulation, and thereby reaches the order of magnitude of the field strength at the reinforced insulated edges on the outer surface. The form rings used here, for example with a U or L-shaped cross section, represent a relatively high outlay which is justified only for very high stresses. This also applies if the shaped rings are made by additional covering of the winding conductors with insulating paper and surround the edge conductors on all sides.

.Bei nicht so extrem hohen Spannungen kann schon in Hochspannungswicklungen ohne verstärkt isolierte Mantelflächen die Belastung der Kantenisolierung an der Mantelfläche der Wicklung niedriger sein als die Belastung durch die Spannung zwischen benachbarten Windungen. Auch hierbei ist durch die Zusatzisolierung eine große Sicherheit_gegen Längsüberschläge wie gegen die im wesentlichen durch die Normalisolierung der Leiter erreichte Sicherheit gegen Durchschläge zwischen benachbarten Windungen einstellbar. Der Aufbau der Zusatzisolierung aus Formringen ist hierbei jedoch im Verhältnis noch aufwendiger als bei Wicklungen mit verstärkt isolierten Mantelflächen.If the voltages are not extremely high, the load on the edge insulation on the outer surface of the winding can be lower than the load from the voltage between adjacent turns, even in high-voltage windings without reinforced insulated outer surfaces. Here too is the additional insulation a great security against longitudinal arcing as well as against the security achieved by the normal insulation of the conductor against breakdowns between adjacent turns. However, the construction of the additional insulation from shaped rings is relatively more complex than in the case of windings with reinforced, insulated jacket surfaces.

Der Erfindung liegt daher die Aufgabe zugrunde, für Hochspannungswicklungen aus Scheibenspulen in Transformatoren mit und ohne verstärkte Isolierung der Wicklungsmantelflächen eine Anordnung und Gestaltung von Scheibenspulen anzugeben, in denen die Sicherheit der Isolierung gegen Längsüberschläge über mehrere Scheibenspulen etwa gleich der Sicherheit der Windungs- und der Spulenisolierung gegen Durchschläge ist, ohne dabei einen nennenswerten Mehraufwand zu erfordern.The invention is therefore based on the object of specifying an arrangement and design of disc coils for high-voltage windings from disc coils in transformers with and without reinforced insulation of the winding outer surfaces, in which the security of the insulation against longitudinal flashovers across several disc coils is approximately equal to the safety of the winding and the coil insulation against breakthroughs, without requiring any significant additional effort.

Erfindungsgemäß wird diese Aufgabe für eine Scheibenspulenwicklung gemäß der eingangs genannten Art dadurch gelöst, daß die Zusatzisolierung auf ein im Querschnitt etwa rechteckiges Abstandsstück reduziert ist, das radial zwischen den zusätzlich zu isolierenden Windungen liegt und dessen Breite in Achsrichtung gleich der entsprechenden Breite des mit Normalisolierung belegten Wickelleiters ist.According to the invention, this object is achieved for a disk coil winding according to the type mentioned at the outset in that the additional insulation is reduced to a spacer which is approximately rectangular in cross section, which lies radially between the turns to be additionally insulated and whose width in the axial direction is equal to the corresponding width of that covered with normal insulation Winding conductor is.

Nach zweckmäßigen Ausgestaltungen der Erfindung ist die Summe der radialen Abmessungen der Zusatzisolierungen je Scheibenspule gleich der radialen Stärke des normal isolierten Wickelleiters oder einem ganzzahligen Vielfachen hiervon. Dabei nimmt zur Gewährleistung der Wirtschaftlichkeit der durch die Zusatzisolierung erzeugte Metallabstand der radial benachbarten Windungen in den vom Hochspannungseingang der Wicklung entfernten Scheibenspulen entsprechend der abnehmenden Stoßbeanspruchungen ab.According to expedient refinements of the invention, the sum of the radial dimensions of the additional insulations per disk coil is equal to the radial thickness of the normally insulated winding conductor or an integral multiple thereof. In order to ensure the economy, the metal spacing of the radially adjacent turns produced by the additional insulation in the disk coils remote from the high-voltage input of the winding decreases in accordance with the decreasing impact loads.

Nach vorteilhaften Ausgestaltungen der Erfindung besteht die Zusatzisolierung aus Isolierstreifen oder aus Kühlkanalleisten oder aus einer Kombination dieser Formen, wobei eine abgestufte Isolierung entsteht, an der bei Stoßspannungsbeanspruchungen die Feldstärken im Öl an den Spulenrändern und zwischen den Windungen annähernd gleich sind.According to advantageous embodiments of the invention, the additional insulation consists of insulating strips or cooling channel strips or a combination of these forms, a graduated insulation being produced on which the field strengths in the oil at the coil edges and between the turns are approximately the same in the event of surge voltage stresses.

Die erfindungsgemäße Ausbildung der Wicklung ist sehr vorteilhaft, weil sie durch Vereinfachung eine wirtschaftliche Gestaltung und Anwendung der in Sonderfällen erforderlichen Zusatzisolierung gewährleistet.The design of the winding according to the invention is very advantageous because, by simplification, it ensures economical design and use of the additional insulation required in special cases.

Sieben Ausführungsbeispiele der Erfindung werden anhand prinzipieller Darstellungen in einer Zeichnung näher erläutert. Dabei sind von Scheibenspulenwicklungen jeweils dem Hochspannungswicklungseingang benachbarte Scheibenspulen dargestellt. Es zeigen:

  • Fig. 1 eine Zusatzisolierung gleicher Gesamtstärke in jeder von drei Scheibenspulen;
  • Fig. 2 eine Zusatzisolierung mit abnehmender Stärke, jedoch gleicher Anzahl von zusätzlich isolierten Windungen in jeder von zwei Scheibenspulen;
  • Fig. 3 eine Zusatzisolierung an allen Windungen in zwei Scheibenspulen;
  • Fig. 4 eine nach Stärke und Stückzahl abgestufte Zusatzisolierung in drei Scheibenspulen, die zusätzlich auch in axialer Richtung Zusatzisolierungen aufweisen und
  • Fig. 5, 6 und 7 eine Zusatzisolierung gleicher Stärke für gleiche Anzahlen von Windungen in je zwei Scheibenspulen.
Seven exemplary embodiments of the invention are explained in more detail on the basis of basic representations in a drawing. Disc coils of the disc coil windings are shown adjacent to the high-voltage winding input. Show it:
  • Fig. 1 additional insulation of the same overall thickness in each of three disc coils;
  • 2 shows additional insulation with decreasing thickness, but the same number of additionally insulated turns in each of two disk coils;
  • 3 shows additional insulation on all turns in two disk coils;
  • Fig. 4 an additional insulation graded according to strength and quantity in three disc coils, which also have additional insulation in the axial direction and
  • 5, 6 and 7 an additional insulation of the same thickness for the same number of turns in two disc coils.

Einander entsprechende Teile sind in allen Figuren mit den gleichen Bezugszeichen versehen.Corresponding parts are provided with the same reference symbols in all figures.

Übliche, sogenannte ineinandergewickelte Scheibenspulen sind aus zwei gleichzeitig und räumlich parallel zugeführten Wickelleitern gewickelt, deren Windungen 1 bis n in der Reihenfolge der eingetragenen Ziffern vom Laststrom durchflossen werden.Usual, so-called interwoven disc coils are wound from two simultaneously and spatially parallel winding conductors, the windings 1 through n of which the load current flows through in the order of the digits entered.

Zwischen einander benachbarten Windungen liegt jeweils ein Vielfaches der Windungsspannung. Zur Bestimmung dieser Spannung ist jeweils die Differenz der Ziffern in den betrachteten Windungen mit der einfachen Windungsspannung zu multiplizieren, woraus man die bei linearer Verteilung, etwa bei Wechselspannung, auftretende Spannungsdifferenz zwischen Nachbarleitern erhält. Die Spannungsdifferenz bei Stoßspannung beträgt ein Mehrfaches dieses linearen Anteils. Bei der Differenzbildung ist lediglich zu berücksichtigen, daß an den eingezeichneten Verbindungen, welche die Leiter mit um eins unterschiedlichen Ziffern verbinden, diese Differenz Null ist. Daher ist bei der Differenzbildung zwischen Nachbarleitern die Anzahl der dazwischenliegenden Verbindungen abzuziehen. Für den so errechneten linearen Anteil der Spannungsdifferenz ist die auf die Wickelleiter aufgebrachte durchgehende Isolierung 70 so ausgelegt, daß sie nicht durchschlagen werden kann. Ausschließlich unter diesem Gesichtspunkt dimensionierte Isolierungen 70 schließen Vorentladungen in den einzelnen Ölzwickeln zwischen den Isolierungen benachbarter Windungen nicht aus.There is a multiple of the winding voltage between adjacent turns. To determine this voltage, the difference between the numbers in the windings under consideration must be multiplied by the simple winding voltage, from which the voltage difference between neighboring conductors that occurs in the case of a linear distribution, for example with AC voltage, is obtained. The voltage difference at surge voltage is a multiple of this linear component. When making the difference, all that needs to be taken into account is that this difference is zero on the connections shown, which connect the conductors with digits that differ by one. For this reason, the number of connections in between must be subtracted when forming the difference between neighboring conductors. For the linear component of the voltage difference calculated in this way, the continuous insulation 70 applied to the winding conductors is designed such that it cannot be penetrated. Insulations 70 dimensioned exclusively from this point of view do not exclude pre-discharges in the individual oil gussets between the insulations of adjacent turns.

Zur Vermeidung der kritischen dieser Vorentladungen und zur Verbesserung der Spannungsfestigkeit der aus Scheibenspulen aufgebauten Hochspannungswicklung dienen Zusatzisolierungen 71 bis 73, deren radiale Stärke mit steigenden Bezugszeichen abnimmt. Durch die Anordnung dieser Zusatzisolierungen werden die Sicherheit der Isolierungen zwischen einander benachbarten Windungen, zwischen einander benachbarten Scheibenspulen, sowie die Spannungsfestigkeit zwischen weiter auseinanderliegenden Scheibenspulen harmonisiert und optimiert.Additional insulations 71 to 73 serve to avoid the critical of these pre-discharges and to improve the dielectric strength of the high-voltage winding constructed from disc coils, the radial strength of which decreases with increasing reference symbols. By arranging these additional insulations, the safety of the insulations between adjacent turns, between adjacent disc coils, and the voltage Strength harmonized and optimized between disc coils that are further apart.

- Kritische Vorentladungen, die radial bis zur Mantelfläche vorlaufen können und dann weiter axial längs der Mantelfläche und somit Längsüberschläge einleiten können, sind nur zwischen Rand- und Nachbarleitern möglich. Bei den Ausführungsbeispielen gemäß der Figuren 2, 5, 6 und 7 sind daher nur dort Zusatzisolierungen 71 bis 73 vorgesehen. Damit aber nicht die zwischen den übrigen Leitern auftretenden nicht kritischen Vorentladungen wegen hoher axialer Feldkomponenten den Kühlkanal überbrücken und dadurch kritisch werden, muß die Kanalisolation entsprechend reichlich dimensioniert werden. Dies erfolgt beispielsweise durch Vergrößerung der radialen Kühlkanäle oder durch eine Anordnung gemäß Figur 4, in der axial zwischen einander benachbarten Scheibenspulen scheibenförmige Zusatzisolierungen 74 vorgesehen sind, die eine weitere Harmonisierung und Optimierung der vorgenannten Spannungsbelastungen ermöglichen.- Critical pre-discharges, which can run radially up to the lateral surface and then continue axially along the lateral surface and thus longitudinal arcing, are only possible between edge and neighboring conductors. In the exemplary embodiments according to FIGS. 2, 5, 6 and 7, additional insulation 71 to 73 are therefore only provided there. So that the non-critical pre-discharges occurring between the other conductors do not bridge the cooling channel due to high axial field components and thereby become critical, the channel insulation must be dimensioned accordingly. This takes place, for example, by enlarging the radial cooling channels or by an arrangement according to FIG. 4, in which disk-shaped additional insulations 74 are provided axially between adjacent disk coils, which enable further harmonization and optimization of the aforementioned voltage loads.

In Fig. 7 ist ein weiteres Ausführungsbeispiel mit scheibenförmigen Zusatzisolierungen 74 dargestellt, bei dem außerdem die den Mantelflächen der Scheibenspulen zugekehrten Ecken durch Winkel 75 verstärkt isoliert sind und in denen die Scheibenförmigen Zusatzisolierungen 74 gleichzeitig die Funktion von Ausgleichsscheiben haben.7 shows a further exemplary embodiment with disk-shaped additional insulations 74, in which the corners facing the outer surfaces of the disk coils are also insulated by angles 75 and in which the disk-shaped additional insulations 74 simultaneously have the function of shims.

Die radial zwischen einander benachbarten Windungen angeordneten Zusatzisolierungen 71 bis 74 verringern insbesondere die Feldstärke des elektrischen Feldes in von einander benachbarten Wickelleiterkanten gebildeten Ölzwickeln und gewährleisten dadurch, daß in diesen Ölzwickeln mögliche Vorentladungen erst bei wesentlich höheren Spannungsbelastungen einsetzen und ermöglichen infolge der unveränderten Normalisolierung der Wickelleiter trotzdem eine praktisch unverändert gleich gute Kühlung derselben.The additional insulations 71 to 74 arranged radially between adjacent turns reduce in particular the field strength of the electric field in oil gussets formed by adjacent winding conductor edges and thereby ensure that oil is in these Use possible pre-discharges only at significantly higher voltage loads and, due to the unchanged normal insulation of the winding conductors, nevertheless enable the same to be cooled practically unchanged.

Vorteilhafterweise ist in Scheibenspulen,die infolge ihres Abstands vom Hochspannungseingang weniger Zusatzisolierungen 71 bis 73 erfordern und deren radiale Abmessungen dadurch kleiner sind als bei Scheibenspulen mit sehr starken Zusatzisolierungen 71 bis 73, die Anzahl der Windungen erhöht.Advantageously, the number of turns is increased in disk coils, which require fewer additional insulations 71 to 73 due to their distance from the high-voltage input and whose radial dimensions are smaller than in disk coils with very strong additional insulation 71 to 73.

Die üblicherweise gleichzeitig gewickelten zwei . Wickelleiter in den Scheibenspulen geben dann nicht an allen Umfangsstellen eine geradzahlige Windungszahl wenn die Verbindungen von Scheibenspule zu Scheibenspule am Umfang entsprechend versetzt sind. Deshalb sind einmal die Windungszahlen in den einzelnen Scheibenspulen nicht alle geradzahlig. Zum anderen ist in den AusfUhrungsbeispielen gemäß Figur 1 bis 5 ohne Beachtung der räumlichen Lage der von Scheibenspule zu Scheibenspule führenden Verbindungsleiter nicht klar die Voraussetzung erkennbar, an welchen Stellen kritische Vorentladungen zum Ausbreiten längs der Wicklungsmantelfläche und zum Längsüberschlag zu erwarten sind. Diese Voraussetzungen sind aber in der Darstellung gemäß Figur 6 längs einer punktierten Linie erfüllt, längs der dann auch ein Längsüberschlag einsetzen wird.The two usually wound at the same time. Winding conductors in the disc coils then do not give an even number of turns at all circumferential points if the connections from disc coil to disc coil are correspondingly offset on the circumference. Therefore, the number of turns in the individual disc coils is not all even. On the other hand, in the exemplary embodiments according to FIGS. 1 to 5, without taking into account the spatial position of the connecting conductors leading from disk coil to disk coil, the prerequisite cannot be clearly recognized at which points critical pre-discharges are to be expected for spreading along the winding surface area and for longitudinal rollover. In the illustration according to FIG. 6, however, these requirements are met along a dotted line, along which a longitudinal rollover will also start.

Die Wirkung der Erfindung beruht auf der Erkenntnis, daß entsprechende Stellen,bei denen Längsüberschlagsvoraussetzungen vorliegen, bei allen ineinandergewickelten Spulen, insbesondere in Ausführungsbeispielen gemäß den Figuren 1 bis 5, an irgend einer nicht gezeichneten Stelle vorkommen. So ist z.B. der in Figur 6 dargestellte Wicklungsquerschnitt eine nicht gezeichnete Umfangsstelle der Anordnung gemäß der Figur 5, sonst aber identisch mit dem in Figur 5 dargestellten Wicklungsquerschnitt.The effect of the invention is based on the knowledge that corresponding points, where there are prerequisites for longitudinal rollover, are not shown on any of the coils wound into one another, in particular in the exemplary embodiments according to FIGS. 1 to 5 Job. For example, the winding cross section shown in FIG. 6 is a circumferential location of the arrangement according to FIG. 5, not shown, but is otherwise identical to the winding cross section shown in FIG. 5.

Claims (5)

1. Scheibenspulenwicklung aus ineinandergewickelten Einzel-oder Doppelspulen, in denen die Isolierung mindestens in den am Wicklungseingang liegenden Spulen ausgehend von der inneren und der äußeren Mantelfläche zwischen mindestens je zwei Windungen durch Zusatzisolierungen verstärkt ist, die mindestens eine Kante dieser Windungen schützen, so daß die Windungskapazität zwischen von Zusatzisolierungen freien Windungen höher ist als die Windungskapazität zwischen den mit Zusatzisolierung ausgerüsteten Windungen, - dadurch gekennzeichnet , daß die Zusatzisolierung (71 bis 73) auf ein im Querschnitt etwa rechteckiges Abstandsstück reduziert ist, das radial zwischen den zusätzlich zu isolierenden Windungen (1 bis n) liegt und dessen Breite in Achsrichtung gleich der entsprechenden Breite des mit Normalisolierung belegten Wickelleiters ist.1. Disc coil winding from interwoven single or double coils, in which the insulation is reinforced at least in the coils lying at the winding input, starting from the inner and the outer surface between at least two turns each by additional insulation, which protect at least one edge of these turns, so that the Winding capacity between windings free of additional insulation is higher than the winding capacity between the windings equipped with additional insulation, - characterized in that the additional insulation (71 to 73) is reduced to a spacer which is approximately rectangular in cross section and which is radial between the windings (1 to n) and whose width in the axial direction is equal to the corresponding width of the winding conductor covered with normal insulation. 2. Scheibenspulenwicklung nach Anspruch 1, dadurch gekennzeichnet , daß die Summe der radialen Abmessungen der Zusatzisolierungen (71 bis 73) je Scheibenspule gleich der radialen Stärke des normal isolierten Wickelleiters oder einem ganzzahligen Vielfachen hiervon ist.2. disc coil winding according to claim 1, characterized in that the sum of the radial dimensions of the additional insulation (71 to 73) per disc coil is equal to the radial thickness of the normally insulated winding conductor or an integer multiple thereof. 3. Scheibenspulenwicklung nach Anspruch 1 und 2, dadurch gekennzeichnet , daß der durch die Zusatzisolierung (71 bis 73) erzeugte Metallabstand zwischen radial benachbarten Windungen mit zunehmendem Abstand der zugehörigen Scheibenspulen vom Hochspannungseingang der Wicklung abnimmt.3. disc coil winding according to claim 1 and 2, characterized in that the metal spacing generated by the additional insulation (71 to 73) between radially adjacent windings decreases with increasing distance of the associated disc coils from the high-voltage input of the winding. 4. Scheibenspulenwicklung nach Anspruch 1 bis 3, dadurch gekennzeichnet , daß die Zusatzisolierung (71 bis 73) aus massiven Isolierstreifen oder Kühlkanalleisten oder einer Kombination dieser beiden Formen bestehen.4. disc coil winding according to claim 1 to 3, characterized in that the additional insulation (71 to 73) consist of solid insulating strips or cooling channel strips or a combination of these two forms. 5. Scheibenspulenwicklung nach Anspruch 1 bis 4, dadurch gekennzeichnet , daß scheibenförmige Zusatzisolierungen (74) oder Ausgleichsscheiben aus Isolierstoff in axialer Richtung zwischen benachbarten Scheibenspulen so angeordnet sind, daß ein radialer ölkanal zwischen zwei benachbarten Scheibenspulen mit unterschiedlicher radialer Ausdehnung die gleiche axiale Höhe hat wie zwischen Scheibenspulen mit einander gleicher radialer Ausdehnung (Fig. 4 und 7).5. disk coil winding according to claim 1 to 4, characterized in that disk-shaped additional insulation (74) or shims made of insulating material are arranged in the axial direction between adjacent disk coils so that a radial oil channel between two adjacent disk coils with different radial expansion has the same axial height as between disc coils with the same radial extent (FIGS. 4 and 7).
EP83101958A 1982-03-15 1983-02-28 Disc coil winding with interleaved singular or double coils Ceased EP0088934A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823209350 DE3209350A1 (en) 1982-03-15 1982-03-15 DISC COIL WINDING FROM INTERLOCKED SINGLE OR DOUBLE COILS
DE3209350 1982-03-15

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EP0088934A1 true EP0088934A1 (en) 1983-09-21

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EP83101958A Ceased EP0088934A1 (en) 1982-03-15 1983-02-28 Disc coil winding with interleaved singular or double coils

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US (1) US4486730A (en)
EP (1) EP0088934A1 (en)
JP (1) JPS58166709A (en)
KR (1) KR840002574A (en)
DE (1) DE3209350A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7719397B2 (en) * 2006-07-27 2010-05-18 Abb Technology Ag Disc wound transformer with improved cooling and impulse voltage distribution

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NL103934C (en) * 1900-01-01
DE1038644B (en) * 1955-11-22 1958-09-11 Bbc Brown Boveri & Cie Arrangement to prevent gliding spark discharges along the high-voltage winding of a transformer with concentric windings, which is made up of disc coils
US2862195A (en) * 1954-07-22 1958-11-25 Siemens Ag Cylindrical windings composed of pancake coils for transformers, reactors and similar apparatus
DE1168557B (en) * 1961-01-16 1964-04-23 Licentia Gmbh Windings for transformers or choke coils made up of disc-shaped coils, especially double coils
US3246270A (en) * 1962-09-10 1966-04-12 Westinghouse Electric Corp Graded insulation for interleaved windings
DE1244945B (en) * 1963-10-18 1967-07-20 Licentia Gmbh Winding for transformers and choke coils made up of disc coils with the same number of turns continuously connected to form double coils, between which there are radial oil ducts
FR1523215A (en) * 1967-01-31 1968-05-03 Skoda Np Winding for a non-rotating electromagnetic machine, in particular a high-voltage transformer, as well as a machine provided with said winding
DE1413549A1 (en) * 1963-09-10 1969-01-09 Licentia Gmbh High-voltage layer winding with internal input for transformers and reactors
US3621428A (en) * 1970-09-24 1971-11-16 Westinghouse Electric Corp Electrical windings and method of constructing same
US3715696A (en) * 1972-05-22 1973-02-06 Gen Electric Disc winding with integral load current carrying rib shielding

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DE1069279B (en) * 1959-11-19
US2905911A (en) * 1954-06-08 1959-09-22 Hitachi Ltd Static shielding of transformer windings
GB1001512A (en) * 1960-11-24 1965-08-18 English Electric Co Ltd Improvements in or relating to electric transformers
US3560902A (en) * 1967-06-14 1971-02-02 Hitachi Ltd Method of providing static shielding of transformer windings

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Publication number Priority date Publication date Assignee Title
NL103934C (en) * 1900-01-01
US2862195A (en) * 1954-07-22 1958-11-25 Siemens Ag Cylindrical windings composed of pancake coils for transformers, reactors and similar apparatus
DE1038644B (en) * 1955-11-22 1958-09-11 Bbc Brown Boveri & Cie Arrangement to prevent gliding spark discharges along the high-voltage winding of a transformer with concentric windings, which is made up of disc coils
DE1168557B (en) * 1961-01-16 1964-04-23 Licentia Gmbh Windings for transformers or choke coils made up of disc-shaped coils, especially double coils
US3246270A (en) * 1962-09-10 1966-04-12 Westinghouse Electric Corp Graded insulation for interleaved windings
DE1413549A1 (en) * 1963-09-10 1969-01-09 Licentia Gmbh High-voltage layer winding with internal input for transformers and reactors
DE1244945B (en) * 1963-10-18 1967-07-20 Licentia Gmbh Winding for transformers and choke coils made up of disc coils with the same number of turns continuously connected to form double coils, between which there are radial oil ducts
FR1523215A (en) * 1967-01-31 1968-05-03 Skoda Np Winding for a non-rotating electromagnetic machine, in particular a high-voltage transformer, as well as a machine provided with said winding
US3621428A (en) * 1970-09-24 1971-11-16 Westinghouse Electric Corp Electrical windings and method of constructing same
US3715696A (en) * 1972-05-22 1973-02-06 Gen Electric Disc winding with integral load current carrying rib shielding

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US4486730A (en) 1984-12-04
KR840002574A (en) 1984-07-02
DE3209350A1 (en) 1983-09-15
JPS58166709A (en) 1983-10-01

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