EP2351056B1 - Barrier arrangement for a cable duct - Google Patents

Barrier arrangement for a cable duct Download PDF

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Publication number
EP2351056B1
EP2351056B1 EP08875066.6A EP08875066A EP2351056B1 EP 2351056 B1 EP2351056 B1 EP 2351056B1 EP 08875066 A EP08875066 A EP 08875066A EP 2351056 B1 EP2351056 B1 EP 2351056B1
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EP
European Patent Office
Prior art keywords
barrier
transformer
induction coil
coil according
cable bushing
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EP08875066.6A
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German (de)
French (fr)
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EP2351056A1 (en
Inventor
Ronny Fritsche
Peter Heinzig
Jens Hoppe
Dietmar Jahnel
Johann Schlager
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Siemens AG
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Siemens 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • 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
    • H01F27/36—Electric or magnetic shields or screens

Definitions

  • the invention relates to a transformer or a choke coil with a line leadthrough arranged thereon as a lead-out and a barrier arrangement for the line leadthrough with adjacent barriers which are arranged at predeterminable distances from one another.
  • Such a transformer is from the DE 1 282 170 A already known.
  • the transformer described there has a tank filled with a transformer oil, in which an upper and lower voltage are arranged concentrically to each other.
  • the high-voltage winding is connected to a conductor pin of a bushing via a diversion.
  • the rejection consists of two parts, so that the bushing can also be mounted on the transformer on site and the bushing and transformer can be transported independently.
  • the removable intermediate piece of the reject line is equipped with shielding electrodes at both ends in order to avoid high electrical field strengths in these areas.
  • isolating barriers made of pressboard are provided, which define oil channels or oil paths between them, the isolating barriers being formed in the shape of a cylinder jacket.
  • a transformer which has a lead-out with which the winding can be connected to a high-voltage bushing.
  • the diversion has a cable entry and an electrode bent over at its free end, which is provided with paper insulation on the outside.
  • plug-in groups of barriers which can be pushed into one another and which define oil passages between them which have different spacings are disclosed. Almost all barriers have a cylindrical jacket shape and extend parallel to one another. Only in the upper end of the curved tube electrode are two barrier elements in this area complimenting the shape of the electrode end.
  • a transformer with a diversion and a barrier system is also disclosed.
  • Electrical systems especially transformers and choke coils, must have a high dielectric strength when used in high-voltage networks.
  • adequate electrical insulation with high dielectric strength in the so-called rejection is essential as a direct link between the electrical system and the high-voltage network.
  • HVDC high-voltage direct current
  • Barrier systems are conventionally used for this purpose, which are arranged around the line in the area of the outlet of the electrical system, a cooling medium, in particular a transformer oil, circulating within the barrier system for electrical insulation and cooling.
  • the cable duct as part of the electrical system is opposite a correspondingly arranged shielding electrode, which is integrated in the barrier system, is electrically shielded from one another.
  • the DE 10 2005 021 255 B4 a barrier system for a cable bushing of an electrical system in which the individual barriers can be plugged into one another in the form of plug-in elements.
  • This connection system is preferably located in a grounded dome, which is attached to the cover or to a side wall of the electrical system, in particular the transformer or reactor. Furthermore, the shielding electrode has paper insulation which ensures appropriate electrical shielding.
  • An exact position of the barriers must be ensured within the barrier system, with 15 to 25 barriers in some cases forming a corresponding barrier system.
  • the length of the barriers can be up to 3,000mm with a diameter of up to 1,500mm.
  • the thickness of the barriers is between 3mm and 5mm.
  • the oil field strengths are increasing with little changed arrangements of the cable bushings and the barrier system.
  • the oil gaps especially between the cable duct and the barriers and the shield electrode, must be reduced further and further.
  • the object of the present invention is therefore to provide a transformer or a choke coil of the type mentioned at the outset, which has an increased dielectric strength between the line bushing and the barrier arrangement.
  • a barrier arrangement according to the features of patent claim 1. According to the invention, provision is made between the barrier arrangement and the line leadthrough at least one barrier element is arranged to form an additional radial oil path.
  • an additional radial oil path is understood to mean a radial circulation system formed by at least one almost rotationally symmetrical barrier element, the oil being able to circulate in the radial and axial direction as a cooling and insulation medium within the additional radial oil path.
  • barriers are one-piece segments which can also be connected to one another and, if appropriate, can also be pushed into one another, and thus are a barrier system, such as in FIG DE 10 2005 021 255 B4 revealed, form.
  • the subdivision of radial oil paths between the line bushing and the electrode or the barrier arrangement - with an equally reliable design - increases the permissible field strengths of the circulating oil.
  • the line bushing can form a wall of the additional radial oil path. This enables use in particular for high operating voltages of more than 500 kV without having to completely redesign the previously known construction of the current diversions.
  • barrier elements form additional radial oil paths.
  • An increase in the permissible field strengths within the circulating oil between the electrode and the line lead-through can thus be ensured, in particular in the area of the corresponding and offset electrode for line lead-through.
  • the additional oil routes have a smaller distance than the oil routes of the barriers.
  • the barrier element advantageously comprises pressboard.
  • a plurality of barrier elements are advantageously arranged at almost constant intervals for the passage of the lines and / or relative to one another.
  • the distances between the additional radial oil paths can vary, in particular a smaller distance in the lower area of the barrier elements is advantageous compared to the distance in the upper area, since this allows the permissible field strengths to be increased in the lower area.
  • the line bushing is shaped as a funnel or cone, which can additionally be formed at the lower end by a cylindrical end.
  • the shape of the barrier elements can be adapted to the respective electrical or structural conditions as a whole or with regard to individual barrier elements.
  • an axial extension of the barrier elements beyond the upper part of the electrode is advantageous with a direct voltage applied to the electrode.
  • the barrier element can advantageously be fastened to the outer barrier arrangement or to the line bushing and is radially spaced from the electrode with a spacer.
  • the cable bushing is used in particular as a diversion on a transformer and / or on a choke coil.
  • the barrier arrangement is advantageously designed as a test barrier arrangement. These test barrier arrangements differ only in the lower region of the electrode arrangement from the arrangement used in a transformer or in a choke coil and can be used for high-voltage tests on cable bushings.
  • the Fig. 1 shows a section of a rejection 1, the representation of Fig. 1 a sectional drawing through a rotationally symmetrical diversion 1 and with respect to the axial axis of rotation 6 only the right part as a portion of the diversion 1 in the Fig. 1 is shown.
  • the barrier arrangement 2 is arranged relative to the line bushing 3 of the transformer (not shown).
  • the rotationally symmetrical barrier arrangement 2 comprises the Fig. 1 three barriers 7a, 7b, 7c, which are arranged relative to the line bushing 3.
  • a paper-insulated electrode 5 is part of the electrical shielding of the lead-out 1. Between the barrier arrangement 2 and the cable bushing 3 is in the example shown Fig.
  • the 1 integrates a barrier element 4a, which forms an additional radial oil path 8a, which is smaller than the conventional oil path, within the discharge line 1, so that the permissible field strengths within the circulating oil can be increased.
  • the additional radial oil path 8a is formed by the barrier element 4a and the line bushing 3.
  • FIG Fig. 2 A partial section of a discharge line 1 (not shown) as a sectional drawing with two rotationally symmetrical barrier elements 4a, 4b to form two additional radial oil paths 8a, 8b between the line leadthrough 3 and the electrode 5 is shown in FIG Fig. 2 shown.
  • the representation of the Fig. 2 is a sectional drawing through a rotationally symmetrical diversion 1 with respect to the axial axis of rotation 6 and shows only a portion of the diversion 1.
  • the first additional radial oil path 8a is formed by the arrangement of the first barrier element 4a relative to the line bushing 3.
  • the second additional radial oil path 8b is created by the almost constant distance A between the first and second barrier elements 4a, 4b.
  • Fig. 3 is a partial section of a diversion 1 (not shown) as a sectional drawing with three rotationally symmetrical barrier elements 4a, 4b, 4c to form additional radial oil paths 8a, 8b, 8c between the line bushing 3 and the electrode 5.
  • the additional radial oil paths 8a, 8b, 8c have due to the different shapes of the barrier elements 4a, 4b, 4c and their relative arrangement to one another have different shapes and diameters.
  • the third additional radial oil path 8c has a smaller diameter in the lower part than in the upper part of the barrier elements 4a, 4b, 4c.
  • the barrier elements 4a, 4b, 4c have an angled shape, which is configured in the upper region parallel to the shape of the line bushing 3.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Gas-Insulated Switchgears (AREA)

Description

Die Erfindung betrifft einen Transformator oder eine Drosselspule mit einer daran als Ausleitung angeordneten Leitungsdurchführung und einer Barrierenanordnung für die Leitungsdurchführung mit nebeneinander angeordneten Barrieren, die in vorgebbaren Abständen zueinander angeordnet sind.The invention relates to a transformer or a choke coil with a line leadthrough arranged thereon as a lead-out and a barrier arrangement for the line leadthrough with adjacent barriers which are arranged at predeterminable distances from one another.

Ein solcher Transformator ist aus der DE 1 282 170 A bereits bekannt. Der dort beschriebene Transformator verfügt über einen mit einem Transformatoröl befüllten Tank, in dem eine Ober- und eine Unterspannung konzentrisch zueinander angeordnet sind. Die Oberspannungswicklung ist über eine Ausleitung mit einem Leiterbolzen einer Durchführung verbunden. Die Ausleitung besteht aus zwei Teilen, so dass die Durchführung vor Ort auch an den Transformator montiert werden kann und Durchführung und Transformator unabhängig voneinander transportiert werden können. Nach der Montage der Durchführung ist das abnehmbare Zwischenstück der Ausleitung an beiden Enden mit Abschirmelektroden ausgestattet, um hohe elektrische Feldstärken in diesen Bereichen zu vermeiden. Darüber hinaus sind Isolierbarrieren aus Pressspan vorgesehen, die Ölkanäle oder Ölstrecken zwischen sich definieren, wobei die Isolierbarrieren zylindermantelförmig ausgebildet sind.Such a transformer is from the DE 1 282 170 A already known. The transformer described there has a tank filled with a transformer oil, in which an upper and lower voltage are arranged concentrically to each other. The high-voltage winding is connected to a conductor pin of a bushing via a diversion. The rejection consists of two parts, so that the bushing can also be mounted on the transformer on site and the bushing and transformer can be transported independently. After assembly of the bushing, the removable intermediate piece of the reject line is equipped with shielding electrodes at both ends in order to avoid high electrical field strengths in these areas. In addition, isolating barriers made of pressboard are provided, which define oil channels or oil paths between them, the isolating barriers being formed in the shape of a cylinder jacket.

Aus der DE 10 2005 021 255 B4 ist ebenfalls ein Transformator bekannt, der über eine Ausleitung verfügt, mit welcher die Wicklung mit einer Hochspannungsdurchführung verbunden werden kann. Die Ausleitung verfügt über eine Leitungsdurchführung sowie eine an ihrem freien Ende umgebogene Elektrode, die außen mit einer Papierisolation versehen ist. Darüber hinaus sind ineinander verschiebbare Steckgruppen von Barrieren offenbart, die zwischen sich Ölkanäle definieren, die unterschiedliche Abstände aufweisen. Nahezu alle Barrieren weisen eine zylindermantelförmige Gestalt auf und erstrecken sich parallel zueinander. Lediglich im oberen Ende der gebogenen Rohrelektrode sind zwei Barrierenelemente in diesem Bereich formkomplimentär zum Elektrodenende ausgebildet.From the DE 10 2005 021 255 B4 a transformer is also known which has a lead-out with which the winding can be connected to a high-voltage bushing. The diversion has a cable entry and an electrode bent over at its free end, which is provided with paper insulation on the outside. Furthermore, plug-in groups of barriers which can be pushed into one another and which define oil passages between them which have different spacings are disclosed. Almost all barriers have a cylindrical jacket shape and extend parallel to one another. Only in the upper end of the curved tube electrode are two barrier elements in this area complimenting the shape of the electrode end.

Aus der EP 0285895 A1 ist ebenfalls ein Transformator mit einer Ausleitung und einem Barrieresystem offenbart. Elektrische Anlagen, insbesondere Transformatoren und Drosselspulen, müssen beim Einsatz in Hochspannungsnetzen eine hohe elektrische Spannungsfestigkeit aufweisen. Insbesondere im Bereich der Kontaktierung der elektrischen Anlage mit einem äußeren Hochspannungsnetz ist eine ausreichende elektrische Isolierung mit hoher Spannungsfestigkeit in der so genannten Ausleitung als unmittelbares Verbindungsglied zwischen der elektrischen Anlage und dem Hochspannungsnetz unumgänglich. Insbesondere für Hochspannungsgleichstrom(HGÜ)-Anwendungen sind aufwändige elektrische Isolationssysteme notwendig. Herkömmlicherweise werden hierzu Barrierensysteme verwendet, die um die Leitung im Bereich der Ausleitung der elektrischen Anlage angeordnet sind, wobei innerhalb des Barrierensystems ein Kühlmedium, insbesondere ein Transformatoröl, zur elektrischen Isolation und zur Kühlung zirkuliert.From the EP 0285895 A1 a transformer with a diversion and a barrier system is also disclosed. Electrical systems, especially transformers and choke coils, must have a high dielectric strength when used in high-voltage networks. In particular in the area of contacting the electrical system with an external high-voltage network, adequate electrical insulation with high dielectric strength in the so-called rejection is essential as a direct link between the electrical system and the high-voltage network. For high-voltage direct current (HVDC) applications in particular, complex electrical insulation systems are necessary. Barrier systems are conventionally used for this purpose, which are arranged around the line in the area of the outlet of the electrical system, a cooling medium, in particular a transformer oil, circulating within the barrier system for electrical insulation and cooling.

Aufgrund der hohen Spannungen ist eine elektrische Abschirmung zwischen der elektrischen Leitung des Hochspannungsnetzes und den Komponenten der elektrischen Anlage nur mittels eines mehrteiligen Barrierensystems möglich. Des Weiteren ist die Leitungsdurchführung als Teil der elektrischen Anlage gegenüber einer entsprechend korrespondierend angeordneten Schirmungselektrode, die in das Barrierensystem integriert ist, elektrisch gegeneinander abgeschirmt. So beschreibt beispielsweise die DE 10 2005 021 255 B4 ein Barrierensystem für eine Leitungsdurchführung einer elektrischen Anlage, bei der die einzelnen Barrieren in Form von Steckelementen ineinander steckbar sind.Because of the high voltages, electrical shielding between the electrical line of the high-voltage network and the components of the electrical system is only possible by means of a multi-part barrier system. Furthermore, the cable duct as part of the electrical system is opposite a correspondingly arranged shielding electrode, which is integrated in the barrier system, is electrically shielded from one another. For example, the DE 10 2005 021 255 B4 a barrier system for a cable bushing of an electrical system in which the individual barriers can be plugged into one another in the form of plug-in elements.

Dieses Verbindungssystem befindet sich vorzugsweise in einem geerdeten Dom, der am Deckel oder an einer Seitenwand der elektrischen Anlage, insbesondere des Transformator- oder Drosselkessels, angebracht ist. Des Weiteren weist die Schirmungselektrode eine Papierisolation auf, die eine entsprechende elektrische Abschirmung gewährleistet. Innerhalb des Barrierensystems muss eine exakte Lage der Barrieren gewährleistet werden, wobei zum Teil 15 bis 25 Barrieren ein entsprechendes Barrierensystem bilden. Die Länge der Barrieren kann dabei bis zu 3.000mm bei einem Durchmesser von bis zu 1.500mm betragen. Die Dicke der Barrieren liegt zwischen 3mm und 5mm.This connection system is preferably located in a grounded dome, which is attached to the cover or to a side wall of the electrical system, in particular the transformer or reactor. Furthermore, the shielding electrode has paper insulation which ensures appropriate electrical shielding. An exact position of the barriers must be ensured within the barrier system, with 15 to 25 barriers in some cases forming a corresponding barrier system. The length of the barriers can be up to 3,000mm with a diameter of up to 1,500mm. The thickness of the barriers is between 3mm and 5mm.

Insbesondere aufgrund der steigenden Anforderungen hinsichtlich der Spannungsebenen von derzeit bis zu 800kV und den daraus resultierenden hohen Prüfspannungen werden bei wenig veränderten Anordnungen der Leitungsdurchführungen und des Barrierensystems die Ölfeldstärken, insbesondere an der Oberfläche der Leitungsdurchführungen, immer größer. Zur Erfüllung der elektrischen Auslegungsbedingungen sind daher die Ölspalte, insbesondere zwischen der Leitungsdurchführung und den Barrieren sowie der Schirmelektrode, immer weiter zu reduzieren.In particular due to the increasing requirements with regard to the voltage levels of currently up to 800 kV and the resulting high test voltages, the oil field strengths, especially on the surface of the cable bushings, are increasing with little changed arrangements of the cable bushings and the barrier system. To meet the electrical design requirements, the oil gaps, especially between the cable duct and the barriers and the shield electrode, must be reduced further and further.

Aufgabe der vorliegenden Erfindung ist es daher, einen Transformator oder eine Drosselspule der eingangs genannten Art bereitzustellen, der bzw. die eine erhöhte Spannungsfestigkeit zwischen der Leitungsdurchführung und der Barrierenanordnung aufweist.The object of the present invention is therefore to provide a transformer or a choke coil of the type mentioned at the outset, which has an increased dielectric strength between the line bushing and the barrier arrangement.

Gelöst wird die Aufgabe durch eine Barrierenanordnung gemäß den Merkmalen des Patentanspruchs 1. Erfindungsgemäß ist vorgesehen, zwischen der Barrierenanordnung und der Leitungsdurchführung mindestens ein Barrierenelement zur Ausbildung einer zusätzlichen radialen Ölstrecke angeordnet ist.The object is achieved by a barrier arrangement according to the features of patent claim 1. According to the invention, provision is made between the barrier arrangement and the line leadthrough at least one barrier element is arranged to form an additional radial oil path.

Im Sinne der vorliegenden Erfindung wird unter einer zusätzlichen radialen Ölstrecke eine durch mindestens ein nahezu rotationssymmetrisches Barrierenelement gebildetes radiales Zirkulationssystem verstanden, wobei innerhalb der zusätzlichen radialen Ölstrecke das Öl als Kühl- und Isolationsmedium in radialer und axialer Richtung zirkulieren kann.In the sense of the present invention, an additional radial oil path is understood to mean a radial circulation system formed by at least one almost rotationally symmetrical barrier element, the oil being able to circulate in the radial and axial direction as a cooling and insulation medium within the additional radial oil path.

Im Sinne der vorliegenden Erfindung sind Barrieren einstückige Segmente, die auch miteinander verbindbar und gegebenenfalls auch ineinander schiebbar sind und damit ein Barrierensystem, wie beispielsweise in der DE 10 2005 021 255 B4 offenbart, bilden.For the purposes of the present invention, barriers are one-piece segments which can also be connected to one another and, if appropriate, can also be pushed into one another, and thus are a barrier system, such as in FIG DE 10 2005 021 255 B4 revealed, form.

Durch die Unterteilung von radialen Ölstrecken zwischen der Leitungsdurchführung und der Elektrode beziehungsweise der Barrierenanordnung werden - bei gleichermaßen zuverlässigem Design - die zulässigen Feldstärken des zirkulierenden Öles erhöht. Die Leitungsdurchführung kann dabei eine Wand der zusätzlichen radialen Ölstrecke ausbilden. Hierdurch ist ein Einsatz insbesondere für hohe Betriebsspannungen von mehr als 500kV möglich, ohne die bisher bekannte Bauweise der derzeitigen Ausleitungen vollständig neu konzipieren zu müssen.The subdivision of radial oil paths between the line bushing and the electrode or the barrier arrangement - with an equally reliable design - increases the permissible field strengths of the circulating oil. The line bushing can form a wall of the additional radial oil path. This enables use in particular for high operating voltages of more than 500 kV without having to completely redesign the previously known construction of the current diversions.

In einer vorteilhaften Ausgestaltung ist vorgesehen, dass weitere Barrierenelemente zusätzliche radiale Ölstrecken ausbilden. Insbesondere im Bereich der korrespondierend und versetzt angeordnete Elektrode zur Leitungsdurchführung kann somit eine Erhöhung der zulässigen Feldstärken innerhalb des zirkulierenden Öls zwischen der Elektrode und der Leitungsdurchführung gewährleistet werden. In einer vorteilhaften Ausgestaltung der Barrierenanordnung ist vorgesehen, dass die zusätzlichen Ölstrecken einen gegenüber den Ölstrecken der Barrieren verkleinerten Abstand aufweisen. Vorteilhafterweise umfasst das Barrierenelement Pressspan. Des Weiteren sind vorteilhafterweise mehrere Barrierenelemente in nahezu gleich bleibenden Abständen zur Leitungsdurchführung und/oder relativ zueinander angeordnet. Alternativ können die Abstände der zusätzlichen radialen Ölstrecken variieren, insbesondere ist ein kleinerer Abstand im unteren Bereich der Barrierenelemente im Vergleich zum Abstand im oberen Bereich von Vorteil, da hierdurch im unteren Bereich die zulässigen Feldstärken verstärkt werden können. In einer vorteilhaften Ausgestaltung der Barrierenanordnung ist die Leitungsdurchführung als Trichter oder Kegel geformt, die zusätzlich am unteren Ende durch einen zylinderförmigen Abschluss ausgebildet werden kann. Die Form der Barrierenelemente kann dabei insgesamt oder bezüglich einzelner Barrierenelemente den jeweiligen elektrischen oder baulichen Gegebenheiten angepasst werden. Insbesondere ist eine axiale Verlängerung der Barrierenelemente über den oberen Teil der Elektrode hinaus bei einer an der Elektrode anliegenden Gleichspannung vorteilhaft.In an advantageous embodiment it is provided that further barrier elements form additional radial oil paths. An increase in the permissible field strengths within the circulating oil between the electrode and the line lead-through can thus be ensured, in particular in the area of the corresponding and offset electrode for line lead-through. In an advantageous embodiment of the barrier arrangement it is provided that the additional oil routes have a smaller distance than the oil routes of the barriers. The barrier element advantageously comprises pressboard. Furthermore, a plurality of barrier elements are advantageously arranged at almost constant intervals for the passage of the lines and / or relative to one another. Alternatively, the distances between the additional radial oil paths can vary, in particular a smaller distance in the lower area of the barrier elements is advantageous compared to the distance in the upper area, since this allows the permissible field strengths to be increased in the lower area. In an advantageous embodiment of the barrier arrangement, the line bushing is shaped as a funnel or cone, which can additionally be formed at the lower end by a cylindrical end. The shape of the barrier elements can be adapted to the respective electrical or structural conditions as a whole or with regard to individual barrier elements. In particular, an axial extension of the barrier elements beyond the upper part of the electrode is advantageous with a direct voltage applied to the electrode.

Mittels Verbindungselementen ist das Barrierenelement vorteilhafterweise an der außen liegenden Barrierenanordnung oder an der Leitungsdurchführung befestigbar und zur Elektrode radial mit Abstandshalter distanziert. Die Leitungsdurchführung dient insbesondere als Ausleitung an einem Transformator und/oder an einer Drosselspule. Des Weiteren ist vorteilhafterweise die Barrierenanordnung als Prüfbarrierenanordnung ausgestaltet. Diese Prüfbarrierenanordnungen unterscheiden sich nur im unteren Bereich der Elektrodenanordnung von der in einem Transformator oder in einer Drosselspule eingesetzten Anordnung und sind für die Hochspannungsprüfungen von Leitungsdurchführungen einsetzbar.By means of connecting elements, the barrier element can advantageously be fastened to the outer barrier arrangement or to the line bushing and is radially spaced from the electrode with a spacer. The cable bushing is used in particular as a diversion on a transformer and / or on a choke coil. Furthermore, the barrier arrangement is advantageously designed as a test barrier arrangement. These test barrier arrangements differ only in the lower region of the electrode arrangement from the arrangement used in a transformer or in a choke coil and can be used for high-voltage tests on cable bushings.

Weitere vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen. Der Gegenstand der Erfindung wird mittels der nachfolgenden Figuren erläutert. Es zeigt

Fig. 1
einen Teilausschnitt einer Ausleitung als Schnittzeichnung mit einem Barrierenelement zur Ausbildung einer zusätzlichen radialen Ölstrecke zwischen dem Barrierenelement und der Leitungsdurchführung;
Fig. 2
einen Teilausschnitt einer Ausleitung als Schnittzeichnung mit zwei Barrierenelementen zur Ausbildung von zusätzlichen radialen Ölstrecken zwischen der Leitungsdurchführung und der Elektrode;
Fig. 3
einen Teilausschnitt einer Ausleitung als Schnittzeichnung mit drei Barrierenelementen zur Ausbildung von zusätzlichen radialen Ölstrecken zwischen der Leitungsdurchführung und der Elektrode.
Further advantageous embodiments result from the subclaims. The subject matter of the invention is explained by means of the following figures. It shows
Fig. 1
a partial section of a rejection as a sectional drawing with a barrier element to form an additional radial oil path between the barrier element and the line bushing;
Fig. 2
a partial section of a rejection as a sectional drawing with two barrier elements to form additional radial oil paths between the line bushing and the electrode;
Fig. 3
a partial section of a rejection as a sectional drawing with three barrier elements to form additional radial oil paths between the line bushing and the electrode.

Die Fig. 1 zeigt einen Ausschnitt einer Ausleitung 1, wobei die Darstellung der Fig. 1 eine Schnittzeichnung durch eine rotationssymmetrisch aufgebaute Ausleitung 1 und bezüglich der axialen Rotationsachse 6 nur der rechte Teil als ein Teilbereich der Ausleitung 1 in der Fig. 1 dargestellt ist. Relativ zur Leitungsdurchführung 3 des Transformators (nicht dargestellt) ist die Barrierenanordnung 2 angeordnet. Die rotationssymmetrische Barrierenanordnung 2 umfasst im gezeigten Beispiel der Fig. 1 drei Barrieren 7a, 7b, 7c, die relativ zur Leitungsdurchführung 3 angeordnet sind. Des Weiteren ist eine papierisolierte Elektrode 5 Teil der elektrischen Abschirmung der Ausleitung 1. Zwischen der Barrierenanordnung 2 und der Leitungsdurchführung 3 ist im gezeigten Beispiel der Fig. 1 ein Barrierenelement 4a integriert, das eine gegenüber der herkömmlichen Ölstrecke verkleinerte zusätzliche radiale Ölstrecke 8a innerhalb der Ausleitung 1 bildet, so dass die zulässigen Feldstärken innerhalb des zirkulierenden Öls erhöht werden können. Die zusätzliche radiale Ölstrecke 8a wird durch das Barrierenelement 4a und die Leitungsdurchführung 3 gebildet.The Fig. 1 shows a section of a rejection 1, the representation of Fig. 1 a sectional drawing through a rotationally symmetrical diversion 1 and with respect to the axial axis of rotation 6 only the right part as a portion of the diversion 1 in the Fig. 1 is shown. The barrier arrangement 2 is arranged relative to the line bushing 3 of the transformer (not shown). In the example shown, the rotationally symmetrical barrier arrangement 2 comprises the Fig. 1 three barriers 7a, 7b, 7c, which are arranged relative to the line bushing 3. Furthermore, a paper-insulated electrode 5 is part of the electrical shielding of the lead-out 1. Between the barrier arrangement 2 and the cable bushing 3 is in the example shown Fig. 1 integrates a barrier element 4a, which forms an additional radial oil path 8a, which is smaller than the conventional oil path, within the discharge line 1, so that the permissible field strengths within the circulating oil can be increased. The additional radial oil path 8a is formed by the barrier element 4a and the line bushing 3.

Einen Teilausschnitt einer Ausleitung 1 (nicht dargestellt) als Schnittzeichnung mit zwei rotationssymmetrischen Barrierenelementen 4a,4b zur Ausbildung von zwei zusätzlichen radialen Ölstrecken 8a,8b zwischen der Leitungsdurchführung 3 und der Elektrode 5 ist in der Fig. 2 dargestellt. Die Darstellung der Fig. 2 ist eine Schnittzeichnung durch eine rotationssymmetrisch aufgebaute Ausleitung 1 bezüglich der axialen Rotationsachse 6 und zeigt nur einen Teilbereich der Ausleitung 1. Die erste zusätzliche radiale Ölstrecke 8a wird durch die Anordnung des ersten Barrierenelements 4a relativ zur Leitungsdurchführung 3 ausgebildet. Die zweite zusätzliche radiale Ölstrecke 8b entsteht durch den nahezu gleichbleibenden Abstand A zwischen dem ersten und dem zweiten Barrierenelement 4a,4b. Diese Barrierenanordnung 2 ermöglicht durch die Ausbildung der zusätzlichen radialen Ölstrecken 8a,8b den Betrieb bei höheren elektrischen Feldstärken. Im gezeigten Beispiel der Fig. 2 besitzen die Barrierenelemente 4a,4b eine gerade Form und ragen nicht über die Elektrode 5 hinaus.A partial section of a discharge line 1 (not shown) as a sectional drawing with two rotationally symmetrical barrier elements 4a, 4b to form two additional radial oil paths 8a, 8b between the line leadthrough 3 and the electrode 5 is shown in FIG Fig. 2 shown. The representation of the Fig. 2 is a sectional drawing through a rotationally symmetrical diversion 1 with respect to the axial axis of rotation 6 and shows only a portion of the diversion 1. The first additional radial oil path 8a is formed by the arrangement of the first barrier element 4a relative to the line bushing 3. The second additional radial oil path 8b is created by the almost constant distance A between the first and second barrier elements 4a, 4b. By forming the additional radial oil paths 8a, 8b, this barrier arrangement 2 enables operation at higher electric field strengths. In the example shown the Fig. 2 the barrier elements 4a, 4b have a straight shape and do not protrude beyond the electrode 5.

In der Fig. 3 ist ein Teilausschnitt einer Ausleitung 1 (nicht dargestellt) als Schnittzeichnung mit drei rotationssymmetrischen Barrierenelementen 4a,4b,4c zur Ausbildung von zusätzlichen radialen Ölstrecken 8a,8b,8c zwischen der Leitungsdurchführung 3 und der Elektrode 5 dargestellt. Die zusätzlichen radialen Ölstrecken 8a,8b,8c weisen aufgrund der unterschiedlichen Formen der Barrierenelemente 4a,4b,4c und deren relative Anordnung zueinander unterschiedliche Formen und Durchmesser auf. Insbesondere weist im gezeigten Beispiel der Fig. 3 die dritte zusätzliche radiale Ölstrecke 8c im unteren Teil einen kleineren Durchmesser als im oberen Teil der Barrierenelemente 4a,4b,4c auf. Im gezeigten Beispiel der Fig. 3 weisen die Barrierenelemente 4a,4b,4c eine gewinkelte Form auf, die im oberen Bereich parallel zur Form der Leitungsdurchführung 3 ausgestaltet ist.In the Fig. 3 is a partial section of a diversion 1 (not shown) as a sectional drawing with three rotationally symmetrical barrier elements 4a, 4b, 4c to form additional radial oil paths 8a, 8b, 8c between the line bushing 3 and the electrode 5. The additional radial oil paths 8a, 8b, 8c have due to the different shapes of the barrier elements 4a, 4b, 4c and their relative arrangement to one another have different shapes and diameters. In particular, in the example shown, the Fig. 3 the third additional radial oil path 8c has a smaller diameter in the lower part than in the upper part of the barrier elements 4a, 4b, 4c. In the example shown the Fig. 3 the barrier elements 4a, 4b, 4c have an angled shape, which is configured in the upper region parallel to the shape of the line bushing 3.

Hierdurch ergibt sich der Vorteil, dass durch die Unterteilung von zusätzlichen radialen Ölstrecken zwischen der Leitungsdurchführung und der Elektrode und/oder der Barrierenanordnung die zulässigen Feldstärken erhöht werden. Dadurch ist es möglich, ähnliche oder sogar baugleiche Leitungsdurchführungen und Barrierenanordnungen für unterschiedliche Betriebsspannungen, beispielsweise für 500kV und für 800kV, zu verwenden. Im Falle einer nahezu baugleichen Leitungsdurchführung und Barrierenanordnung muss in Abhängigkeit der gewünschten Betriebsspannung lediglich das Barrierenelement bezüglich des gleich bleibenden Abstandes zur Leitungsdurchführung angepasst beziehungsweise durch weitere Barrierenelemente erweitert werden.This has the advantage that the permissible field strengths are increased by dividing additional radial oil paths between the line bushing and the electrode and / or the barrier arrangement. This makes it possible to use similar or even identical cable bushings and barrier arrangements for different operating voltages, for example for 500kV and for 800kV. In the case of an almost identical cable duct and barrier arrangement, depending on the desired operating voltage, only the barrier element needs to be adapted with respect to the constant distance to the cable duct or expanded by additional barrier elements.

Claims (12)

  1. Transformer or induction coil having a cable bushing (3) arranged thereon as an output line (1) and having a barrier arrangement (2) for the cable bushing (3) having barriers (7a, 7b, 7c) which are arranged alongside one another and are arranged at predeterminable distances from one another,
    characterized in that
    a barrier element (4a, 4b, 4c) is arranged between the barrier arrangement (2) and the cable bushing (3), said barrier element forming for configuration purposes an additional oil path (8a, 8b, 8c) between itself and the cable bushing, wherein the barrier element (4a, 4b, 4c) extends at least in sections parallel to the cable bushing (3).
  2. Transformer or induction coil according to Claim 1,
    characterized in that
    the additional oil path (8a, 8b, 8c) is shortened relative to the oil paths between the barriers (7a, 7b, 7c).
  3. Transformer or induction coil according to one of Claims 1 and 2,
    characterized in that
    further barrier elements (4b, 4c) are arranged relative to the first barrier element (4a), and each form further additional radial oil paths (8a, 8b, 8c) between themselves and the first or a different barrier element (4b, 4c).
  4. Transformer or induction coil according to Claim 3,
    characterized in that
    the barrier elements (4a, 4b, 4c) form additional oil paths (8a, 8b, 8c) which extend axially into an electrode (5) and therefore at least partially ensure an axial overlap of the additional radial oil paths (8a, 8b, 8c) between the barrier arrangement (2) and the electrode (5), as well as the cable bushing (3).
  5. Transformer or induction coil according to one of Claims 3 and 4,
    characterized in that
    the barrier elements (4a, 4b, 4c) are in the form of a segment and can be fixed to the cable bushing (3) and/or to the barriers (7a, 7b, 7c).
  6. Transformer or induction coil according to one of Claims 1 to 5,
    characterized in that
    the barrier element (4a, 4b, 4c) is composed of chipboard.
  7. Transformer or induction coil according to one of Claims 1
    to 6,
    characterized in that
    the barrier elements (4a, 4b, 4c) are arranged relative to one another such that the additional radial oil paths (8a, 8b, 8c) are separated by a shorter distance in the lower area of the barrier elements (4a, 4b, 4c) than in the upper area of the barrier elements (4a, 4b, 4c).
  8. Transformer or induction coil according to one of Claims 1 to 6,
    characterized in that
    the barrier elements (4a, 4b, 4c) are arranged relative to one another such that the additional radial oils paths (8a, 8b, 8c) are separated by virtually the same distance (A).
  9. Transformer or induction coil according to one of Claims 1 to 8,
    characterized in that
    the cable bushing (3) is in the form of a funnel or cone with a
    cylindrical attachment.
  10. Transformer or induction coil according to one of Claims 1 to 9,
    characterized in that
    the barrier element (4a, 4b, 4c) is attached by means of connecting elements to the outer barrier arrangement (2) or to the cable bushing (3).
  11. Barrier arrangement (2) according to one of Claims 1 to 10,
    characterized in that
    the barrier arrangement (2) is a test barrier arrangement for continuity testing.
  12. Transformer or induction coil according to one of Claims 1 to 11,
    characterized in that
    the cable bushing (3) is arranged on a cable box and/or connecting channel which is filled with insulating liquid.
EP08875066.6A 2008-11-28 2008-11-28 Barrier arrangement for a cable duct Active EP2351056B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/010285 WO2010060450A1 (en) 2008-11-28 2008-11-28 Barrier arrangement for a cable duct

Publications (2)

Publication Number Publication Date
EP2351056A1 EP2351056A1 (en) 2011-08-03
EP2351056B1 true EP2351056B1 (en) 2019-12-25

Family

ID=40791403

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08875066.6A Active EP2351056B1 (en) 2008-11-28 2008-11-28 Barrier arrangement for a cable duct

Country Status (4)

Country Link
EP (1) EP2351056B1 (en)
CN (1) CN102227785B (en)
BR (1) BRPI0823215A2 (en)
WO (1) WO2010060450A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2620958B1 (en) * 2012-01-26 2014-11-26 Siemens Aktiengesellschaft Shielding device for an electrically conductive connection element
EP2942795B1 (en) * 2014-05-07 2017-03-01 ABB Schweiz AG High voltage electromagnetic induction device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1282170B (en) * 1964-08-25 1968-11-07 Licentia Gmbh Removable bushing for high voltage transformers
DE3868959D1 (en) * 1987-04-09 1992-04-16 Siemens Ag HIGH VOLTAGE INSULATION ARRANGEMENT FOR TRANSFORMERS AND THROTTLE COILS, IN PARTICULAR FOR HIGH VOLTAGE DC CURRENT TRANSMISSION (HGUE).
DE102005021255B4 (en) * 2005-05-02 2007-08-16 Siemens Ag Barrier system for the line feedthrough of an electrical system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2010060450A1 (en) 2010-06-03
CN102227785A (en) 2011-10-26
CN102227785B (en) 2013-06-19
BRPI0823215A2 (en) 2015-06-30
EP2351056A1 (en) 2011-08-03

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