EP2047485B1 - Apparatus for electrical screening of a high-voltage bushing - Google Patents

Apparatus for electrical screening of a high-voltage bushing Download PDF

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Publication number
EP2047485B1
EP2047485B1 EP07787927.8A EP07787927A EP2047485B1 EP 2047485 B1 EP2047485 B1 EP 2047485B1 EP 07787927 A EP07787927 A EP 07787927A EP 2047485 B1 EP2047485 B1 EP 2047485B1
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EP
European Patent Office
Prior art keywords
screening apparatus
bushing
electrical
output
shield
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EP07787927.8A
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German (de)
French (fr)
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EP2047485A1 (en
Inventor
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
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
    • 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

Definitions

  • the invention relates to an electrical shielding device for a nearly rectangular bushing output of a high voltage line in an outer wall of a high voltage electrical device having an electrically conductive Ableungsinneres and an arcuate circular segment with two legs, which can be arranged around the nearly rectangular feedthrough output such that a leg almost parallel to the implementation and the other leg are aligned almost parallel to the outer wall.
  • Such a shielding is from the US 6,218,627 B1 already known.
  • the shielding device disclosed therein has two legs, which span a right angle with each other and are connected to one another via an arcuate circular segment.
  • the shielding element serves to reduce the electric field strength at the feedthrough output of a high-voltage device.
  • shielding wire is arranged around the feed-through output within the electrical high-voltage device.
  • This shielding wire is conventionally provided with an electrically conductive shielding interior which is electrically insulated on the surface, in particular by paper insulation.
  • shielding rings of a different shape are also known in the prior art, which have a rectangular electrically conductive shielding interior.
  • a high voltage feedthrough comprising a high voltage conductor in an insulator provided with insulating screens, having at one end a flange through which the high voltage conductor passes, wherein an insulation medium is provided between the flange and the high voltage conductor.
  • a shielding electrode is disposed around the insulator extending from the flange in the axial direction over part of the length of the insulator, the number of insulator screens per unit length being different in the individual sections.
  • the shield interior comprises an outer insulating layer enclosing the shielding interior and an at least barrier barrier system is provided for additional electrical insulation.
  • the shield has an arcuate circular segment designed to be mounted on a nearly rectangular design of the bushing. This ensures that the field pattern of the electric field is changed in the vicinity of the almost rectangular bushing output.
  • the field pattern of the electric field in the vicinity of corners and edges is highly complex and insufficiently secured by electrical shielding heretofore.
  • electrical shielding heretofore.
  • the inventive design of the electrical shield as arcuate circular segment with two elongated legs affects the course of the electric field in the vicinity of the bushing output in the way that the housing of the electrical high voltage device is completely shielded in the region of the feedthrough output.
  • the shield is shielded by an additional barrier system.
  • barrier systems already used in the cable bushings are also combined as a shielding barrier system with the shield according to the invention around the output of the implementation.
  • an effective electrical shielding of the corners and edges of the feed-through output to the outer wall of the electrical high-voltage device is ensured due to the possible high transmission voltages.
  • the electrical shield is positioned around the nearly rectangular feed-through output so that the radius of the arcuate circular segment extends through the corner of the nearly rectangular feedthrough output.
  • the shield is positioned symmetrically to the two edges of the almost rectangular bushing output.
  • the shape of the shield corresponds to an idealized field profile of the electric field in the vicinity of the feedthrough output.
  • the radius of the arcuate circular segment of the shield is smaller than four times the length of the legs. As a result, an all-round shielding of the corresponding corners and edges of the bushing output is guaranteed. Also, the radius is preferably a length of 10 mm to 500 mm, preferably 100 mm.
  • the barrier system with the barrier system of the implementation and / or the barrier system of the electrical high voltage device is mechanically connected.
  • the shield is formed around the lead-through output as a circumferential one-piece element. As a result, a cost-effective production of the shield and a dimensionally stable effect of the shield given.
  • individual shield segments are arranged in a circle around the lead-through output. The same applies to a corresponding barrier system, for additional shielding.
  • the shield is connected to the electrical ground.
  • the shield is at least partially made of conductive material, which is partially interrupted by non-conductive material.
  • the shield consists of a carrier material which is at least partially encased with a conductive layer, in particular coated or encased.
  • the figure Fig. 1 shows a schematic sectional view of the basic structure of the shield 10 according to the invention.
  • the dashed line represents the axis of rotation of the shield 10.
  • the shield inner 11 is, at least to the interior of the electrical high voltage device, insulated with an additional insulating layer 12. Traditionally, this is a paper insulation.
  • the shield 10 is an isolation medium, in particular an oil, within the electrical high voltage device available.
  • the shield 10, which is arranged at approximately a right angle around a feedthrough output (not shown), has two limbs 23, which are part of the arcuate circular segment.
  • the leg length is defined with respect to the transition of the arcuate circular segment to the respective straight legs 23.
  • the radius 22 defines the shape of the arcuate circular segment of the shield 10 and passes through the unillustrated corner of the line feedthrough output 21 (not shown).
  • the figure Fig. 2 shows a shield 10 with an additional barrier system 14 to a feedthrough output 21 for a high voltage electrical line.
  • the dashed line represents the axis of rotation of the shield 10, the circular passage 15 and the circular outlet 16.
  • a discharge 16 is arranged with a paper insulation 17, which is an electrical connection of the high voltage device with an external high voltage network, in particular a HVDC Network, allows.
  • the shield 10 is arranged such that a symmetrical about the vertex of the almost rectangular bushing outlet 21 coverage of both angles of the passage 15 and the boiler wall 20 is ensured.
  • the additional barrier system 14 around the shield 10, in conjunction with the circulating oil within the high voltage electrical appliance and feedthrough 15, provides optimum electrical shielding of the corners of the feedthrough output 21.
  • the barrier system 14 can shield the shield 10 within the feedthrough 15 and be connected to the electrical high voltage device, so that a continuous barrier system 14 is given from the lead-out 21 to the implementation 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Cable Accessories (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Description

Die Erfindung betrifft eine Elektrischen Abschirmungsvorrichtung für einen nahezu rechtwinkligen Durchführungsausgang einer Durchführung einer Hochspannungsleitung in eine Außenwand eines elektrischen Hochspannungsgerätes, die ein elektrisch leitendes Abschirmungsinneres und ein bogenförmiges Kreissegment mit zwei Schenkeln aufweist, welches um den nahezu rechtwinkligen Durchführungsausgang derart anordenbar ist, dass ein Schenkel nahezu parallel zur Durchführung und der andere Schenkel nahezu parallel zur Außenwand ausgerichtet sind.The invention relates to an electrical shielding device for a nearly rectangular bushing output of a high voltage line in an outer wall of a high voltage electrical device having an electrically conductive Abschirmungsinneres and an arcuate circular segment with two legs, which can be arranged around the nearly rectangular feedthrough output such that a leg almost parallel to the implementation and the other leg are aligned almost parallel to the outer wall.

Eine solche Abschirmvorrichtung ist aus der US 6,218,627 B1 bereits bekannt. Die dort offenbarte Abschirmvorrichtung weist zwei Schenkel auf, die miteinander einen rechten Winkel aufspannen und über ein bogenförmiges Kreissegment miteinander verbunden sind. Dabei dient das Abschirmungselement zur Herabsetzung der elektrischen Feldstärke am Durchführungsausgang eines Hochspannungsgerätes.Such a shielding is from the US 6,218,627 B1 already known. The shielding device disclosed therein has two legs, which span a right angle with each other and are connected to one another via an arcuate circular segment. The shielding element serves to reduce the electric field strength at the feedthrough output of a high-voltage device.

Bei elektrischen Hochspannungsgeräten, wie zum Beispiel Leistungstransformatoren, muss für den elektrischen Anschluss an ein Hochspannungsnetzwerk gewährleistet sein, dass im Bereich des elektrischen Anschlusses und des Überganges der elektrischen Leitung in das Hochspannungsgerät eine ausreichende elektrische Abschirmung gegeben ist. Insbesondere für Hochspannungsgleichstrom (HGÜ)- Vorrichtungen ist es zwingend notwendig, dass die Durchführung und die der Durchführung zugewandten Wand des elektrischen Hochspannungsgerätes ausreichend elektrisch geschirmt sind. Elektrisch ausreichend abgeschirmt bedeutet eine Reduzierung der auftretenden elektrischen Feldstärke auf der Oberfläche der Abschirmung und im angrenzenden Raum.In the case of electrical high-voltage equipment, such as power transformers, it must be ensured for the electrical connection to a high-voltage network that there is sufficient electrical shielding in the area of the electrical connection and the transition of the electrical line into the high-voltage device. In particular, for high-voltage direct current (HVDC) devices, it is imperative that the implementation and the wall facing the implementation of the electrical high-voltage device are sufficiently shielded electrically. Electrically adequately shielded means a reduction of the occurring electric field strength on the surface of the shield and in the adjacent room.

Aus dem Grunde der hochspannungstechnischen Abschirmung werden die Kantenübergänge und Ecken zwischen der Durchführung der Hochspannungsleitung und der senkrecht dazu befindlichen Kesselwand gemäß dem Stand der Technik derart geschirmt, dass ein so genannter Schirmungsdraht um den Durchführungsausgang innerhalb des elektrischen Hochspannungsgerätes angeordnet ist. Dieser Schirmungsdraht ist herkömmlicherweise mit einem elektrisch leitenden Abschirmungsinneren versehen, das auf der Oberfläche elektrisch isoliert ist, insbesondere durch eine Papierisolation. Hiervon abgewandelt sind auch im Stand der Technik anders ausgeformte Schirmungsringe bekannt, die ein rechteckiges elektrisch leitendes Abschirmungsinnere aufweisen.For the reason of high-voltage shielding, the edge transitions and corners between the passage of the high-voltage line and the boiler wall perpendicular thereto are shielded in accordance with the prior art such that a so-called shielding wire is arranged around the feed-through output within the electrical high-voltage device. This shielding wire is conventionally provided with an electrically conductive shielding interior which is electrically insulated on the surface, in particular by paper insulation. Modified differently, shielding rings of a different shape are also known in the prior art, which have a rectangular electrically conductive shielding interior.

So beschreibt die US 4,296,274 eine Hochspannungsdurchführung, die eine wetterfeste Schirmung aufweist. Durch eine zusätzliche Verdickung des entsprechenden Übergangsbereichs der Durchführung wird eine vorteilhafte Führung des elektrischen Feldes gemäß der dortigen Erfindung erreicht.That's how it describes US 4,296,274 a high voltage feedthrough having a weatherproof shield. By an additional thickening of the corresponding transition region of the implementation, an advantageous guidance of the electric field according to the local invention is achieved.

Ebenfalls beschreibt die WO 00/19453 eine Hochspannungsdurchführung mit einem Hochspannungsleiter in einem mit Isolationsschirmen versehenen Isolator, der an einem Ende einen Flansch aufweist, durch den der Hochspannungsleiter hindurchgeführt wird, wobei zwischen Flansch und Hochspannungsleiter ein Isolationsmedium vorgesehen ist. Zusätzlich ist um den Isolator eine Schirmungselektrode angeordnet, die sich vom Flansch in axialer Richtung über einen Teil der Länge des Isolators erstreckt, wobei die Anzahl der Isolationsschirme pro Längeneinheit in den einzelnen Abschnitten unterschiedlich ist.Also describes the WO 00/19453 a high voltage feedthrough comprising a high voltage conductor in an insulator provided with insulating screens, having at one end a flange through which the high voltage conductor passes, wherein an insulation medium is provided between the flange and the high voltage conductor. In addition, a shielding electrode is disposed around the insulator extending from the flange in the axial direction over part of the length of the insulator, the number of insulator screens per unit length being different in the individual sections.

Nachteilig an allen im Stand der Technik bekannten Abschirmungslösungen für Hochspannungsdurchführungen ist, dass die bisherigen Lösungen entweder konstruktiv aufwändig oder keine vollständige Abschirmung des nahezu rechtwinkligen Durchführungsausganges gewährleisten. Insbesondere die elektrische Abschirmung der nahezu rechtwinkligen Ecken und Kanten des Durchführungsausganges relativ zur Kesselwandung wird durch die im Stand der Technik bereitgestellten Lösungen nicht vollständig gewährleistet.A disadvantage of all known in the art shielding solutions for high-voltage bushings is that the previous solutions either structurally complex or not ensure complete shielding of the almost rectangular bushing output. In particular, the electric Shielding of the near-right angles and edges of the bushing outlet relative to the vessel wall is not completely guaranteed by the solutions provided in the prior art.

Aufgabe der vorliegenden Erfindung ist es daher, eine elektrische Abschirmung bereitzustellen, die eine vollständige Abschirmung der Ecken und Kanten eines Durchführungsausgangs in ein elektrisches Hochspannungsgerät gewährleistet.It is therefore an object of the present invention to provide an electrical shield which ensures complete shielding of the corners and edges of a feedthrough output into an electrical high voltage device.

Gelöst wird diese Aufgabe dadurch, dass das Abschirmungsinnere eine äußere, das Abschirmungsinnere umschließende Isolationsschicht umfasst und ein zumindest aus einer Barriere bestehendes Barrierensystem zur zusätzlichen elektrischen Isolierung vorgesehen ist.This object is achieved in that the shield interior comprises an outer insulating layer enclosing the shielding interior and an at least barrier barrier system is provided for additional electrical insulation.

Erfindungsgemäß weist die Abschirmung ein bogenförmiges Kreissegment auf, das zur Montage an einer nahezu rechteckigen Ausführung der Durchführung konzipiert vorgesehen ist. Hierdurch ist gewährleistet, dass der Feldverlauf des elektrischen Feldes in der Nähe des nahezu rechtwinkligen Durchführungsausganges verändert wird. Herkömmlicherweise ist der Feldverlauf des elektrischen Feldes in der Nähe von Ecken und Kanten hochgradig komplex und nur unzureichend durch eine elektrische Abschirmung bisher sichergestellt. Mittels der erfindungsgemäßen Vorrichtung ist es jedoch möglich, den Verlauf des elektrischen Feldes in der Nähe der Ecken und Kanten so zu beeinflussen, dass eine nahezu vollständige Abschirmung der Ecken und Kanten in der Nähe des Durchführungsausganges gewährleistet ist. Die erfindungsgemäße Ausgestaltung der elektrischen Abschirmung als bogenförmiges Kreissegment mit zwei länglichen Schenkeln beeinflusst den Verlauf des elektrischen Feldes in der Umgebung des Durchführungsausgangs in der Art, dass das Gehäuse des elektrischen Hochspannungsgerätes vollständig im Bereich des Durchführungsausganges elektrisch geschirmt ist.According to the invention, the shield has an arcuate circular segment designed to be mounted on a nearly rectangular design of the bushing. This ensures that the field pattern of the electric field is changed in the vicinity of the almost rectangular bushing output. Conventionally, the field pattern of the electric field in the vicinity of corners and edges is highly complex and insufficiently secured by electrical shielding heretofore. By means of the device according to the invention, however, it is possible to influence the course of the electric field in the vicinity of the corners and edges so that an almost complete shielding of the corners and edges is ensured in the vicinity of the bushing output. The inventive design of the electrical shield as arcuate circular segment with two elongated legs affects the course of the electric field in the vicinity of the bushing output in the way that the housing of the electrical high voltage device is completely shielded in the region of the feedthrough output.

Im Rahmen der Erfindung ist ferner vorgesehen, dass die Abschirmung durch ein zusätzliches Barrierensystem geschirmt ist. Diese bei den Leitungsdurchführungen bereits verwendeten Barrierensysteme werden ebenfalls als schirmendes Barrierensystem mit der erfindungsgemäßen Abschirmung um den Ausgang der Durchführung kombiniert. Insbesondere für HGÜ-Anwendungen ist aufgrund der möglichen hohen Übertragungsspannungen eine effektive elektrische Abschirmung der Ecken und Kanten des Durchführungsausganges zur Außenwand des elektrischen Hochspannungsgerätes gewährleistet.In the context of the invention it is further provided that the shield is shielded by an additional barrier system. These barrier systems already used in the cable bushings are also combined as a shielding barrier system with the shield according to the invention around the output of the implementation. In particular for HVDC applications, an effective electrical shielding of the corners and edges of the feed-through output to the outer wall of the electrical high-voltage device is ensured due to the possible high transmission voltages.

In einer vorteilhaften Ausgestaltung der erfindungsgemäßen Vorrichtung ist die elektrische Abschirmung um den nahezu rechtwinkligen Durchführungsausgang so positioniert, dass der Radius des bogenförmigen Kreissegmentes durch die Ecke des nahezu rechtwinkligen Durchführungsausganges verläuft. Hierdurch ist die Abschirmung symmetrisch zu den beiden Kanten des nahezu rechtwinkligen Durchführungsausganges positioniert. Weiterhin ist in einer vorteilhaften Ausgestaltung der erfindungsgemäßen Vorrichtung vorgesehen, dass die Form der Abschirmung einem idealisierten Feldverlauf des elektrischen Feldes in der Umgebung des Durchführungsausganges entspricht.In an advantageous embodiment of the device according to the invention, the electrical shield is positioned around the nearly rectangular feed-through output so that the radius of the arcuate circular segment extends through the corner of the nearly rectangular feedthrough output. As a result, the shield is positioned symmetrically to the two edges of the almost rectangular bushing output. Furthermore, it is provided in an advantageous embodiment of the device according to the invention that the shape of the shield corresponds to an idealized field profile of the electric field in the vicinity of the feedthrough output.

Vorteilhafterweise ist vorgesehen, dass der Radius des bogenförmigen Kreissegmentes der Abschirmung kleiner als die vierfache Länge der Schenkel ist. Hierdurch ist eine allseitige Abschirmung der entsprechenden Ecken und Kanten des Durchführungsausganges gewährleistet. Ebenfalls beträgt der Radius vorzugsweise eine Länge von 10 mm bis 500 mm, vorzugsweise 100 mm. Vorteilhafterweise ist das Barrierensystem mit dem Barrierensystem der Durchführung und/oder dem Barrierensystem des elektrischen Hochspannungsgerätes mechanisch verbunden.Advantageously, it is provided that the radius of the arcuate circular segment of the shield is smaller than four times the length of the legs. As a result, an all-round shielding of the corresponding corners and edges of the bushing output is guaranteed. Also, the radius is preferably a length of 10 mm to 500 mm, preferably 100 mm. Advantageously, the barrier system with the barrier system of the implementation and / or the barrier system of the electrical high voltage device is mechanically connected.

Es wird als Vorteil angesehen, dass die Abschirmung um den Durchführungsausgang als umlaufendes einstückiges Element ausgeformt ist. Hierdurch sind eine kostengünstige Herstellung der Abschirmung sowie eine formstabile Wirkung der Abschirmung gegeben. Alternativ ist vorgesehen, dass einzelne Abschirmungssegmente kreisförmig um den Durchführungsausgang angeordnet sind. Gleiches gilt für ein entsprechendes Barrierensystem, zur zusätzlichen Abschirmung. Vorteilhafterweise ist die Abschirmung mit der elektrischen Masse verbunden.It is considered an advantage that the shield is formed around the lead-through output as a circumferential one-piece element. As a result, a cost-effective production of the shield and a dimensionally stable effect of the shield given. Alternatively, it is provided that individual shield segments are arranged in a circle around the lead-through output. The same applies to a corresponding barrier system, for additional shielding. Advantageously, the shield is connected to the electrical ground.

Ferner besteht die Möglichkeit, diese elektrische Abschirmung zugleich als magnetische Abschirmung zu nutzen, wenn man die Abschirmung aus leitendem Material herstellt. Dann würden lokale Erwärmungen, bedingt durch Wirbelströme, die zu beträchtlichen Erwärmungen und gegebenenfalls Beschädigungen des elektrischen Hochspannungsgerätes führen können, vermieden. Vorteilhafterweise besteht die Abschirmung zumindest teilweise aus leitendem Material besteht, welches zum Teil durch nicht leitendes Material unterbrochen ist.It is also possible to use this electrical shield at the same time as a magnetic shield when making the shield of conductive material. Then local heating, caused by eddy currents, which can lead to considerable warming and possibly damage the high voltage electrical equipment, avoided. Advantageously, the shield is at least partially made of conductive material, which is partially interrupted by non-conductive material.

Weiterhin besteht in einer vorteilhaften Ausgestaltung der Vorrichtung die Abschirmung aus einem Trägermaterial, welches mit einer leitenden Schicht zumindest teilweise ummantelt, insbesondere beschichtet oder ummantelt, ist.Furthermore, in an advantageous embodiment of the device, the shield consists of a carrier material which is at least partially encased with a conductive layer, in particular coated or encased.

Weitere vorteilhafte Ausgestaltungen der Erfindung finden sich in den Unteransprüchen. Die Erfindung wird anhand der Ausführungsbeispiele in den Zeichnungen näher erläutert. Es zeigen:

Fig. 1
schematische Schnittzeichnung der Abschirmung;
Fig. 2
schematische Schnittzeichnung der Abschirmung um eine Leitungsdurchführung mit zusätzlichen Barrierensystemen.
Further advantageous embodiments of the invention can be found in the subclaims. The invention will be explained in more detail with reference to the embodiments in the drawings. Show it:
Fig. 1
schematic sectional drawing of the shield;
Fig. 2
schematic sectional drawing of the shield around a cable bushing with additional barrier systems.

Die Figur Fig. 1 zeigt eine schematische Schnittzeichnung des prinzipiellen Aufbaus der erfindungsgemäßen Abschirmung 10. Die gestrichelte Linie stellt die Rotationsachse der Abschirmung 10 dar. Das Abschirmungsinnere 11 ist, zumindest zum Inneren des elektrischen Hochspannungsgerätes, mit einer zusätzlichen Isolationsschicht 12 isoliert. Herkömmlicherweise handelt es sich hierbei um eine Papierisolation. In der Umgebung der Abschirmung 10 ist ein Isolationsmedium, insbesondere ein Öl, innerhalb des elektrischen Hochspannungsgerätes vorhanden. Die nahezu rechtwinklig um einen Durchführungsausgang (nicht dargestellt) angeordnete Abschirmung 10 weist zwei Schenkel 23 auf, die Teil des bogenförmigen Kreissegmentes sind. Die Schenkellänge ist bezüglich des Übergangs des bogenförmigen Kreissegmentes zu den jeweils geraden Schenkeln 23 definiert. Der Radius 22 definiert die Form des bogenförmigen Kreissegmentes der Abschirmung 10 und verläuft durch die nicht dargestellte Ecke der Leitungsdurchführungsausgangs 21 (nicht dargestellt).The figure Fig. 1 shows a schematic sectional view of the basic structure of the shield 10 according to the invention. The dashed line represents the axis of rotation of the shield 10. The shield inner 11 is, at least to the interior of the electrical high voltage device, insulated with an additional insulating layer 12. Traditionally, this is a paper insulation. In the neighborhood the shield 10 is an isolation medium, in particular an oil, within the electrical high voltage device available. The shield 10, which is arranged at approximately a right angle around a feedthrough output (not shown), has two limbs 23, which are part of the arcuate circular segment. The leg length is defined with respect to the transition of the arcuate circular segment to the respective straight legs 23. The radius 22 defines the shape of the arcuate circular segment of the shield 10 and passes through the unillustrated corner of the line feedthrough output 21 (not shown).

Die Figur Fig. 2 zeigt eine Abschirmung 10 mit einem zusätzlichen Barrierensystem 14 um einen Durchführungsausgang 21 für eine elektrische Hochspannungsleitung. Die gestrichelte Linie stellt die Rotationsachse der Abschirmung 10, der kreisförmigen Durchführung 15 bzw. der kreisförmigen Ausleitung 16 dar. Innerhalb der Durchführung 15 ist eine Ausleitung 16 mit einer Papierisolation 17 angeordnet, die eine elektrische Verbindung des Hochspannungsgerätes mit einem äußeren Hochspannungsnetz, insbesondere einem HGÜ-Netz, ermöglicht. Zu dem nahezu rechtwinkligen Durchführungsausgang 21 ist die Abschirmung 10 derart angeordnet, dass eine um den Eckpunkt des nahezu rechtwinkligen Durchführungsausganges 21 symmetrische Abdeckung beider Winkel der Durchführung 15 beziehungsweise der Kesselwand 20 gewährleistet ist. Das zusätzliche Barrierensystem 14 um die Abschirmung 10 garantiert in Verbindung mit dem zirkulierenden Öl innerhalb des elektrischen Hochspannungsgerätes und der Durchführung 15 eine optimale elektrische Abschirmung der Ecken des Durchführungsausgangs 21. Vorteilhafterweise kann das Barrierensystem 14 der Abschirmung 10 mit dem Barrierensystem 14 innerhalb der Durchführung 15 und/oder des elektrischen Hochspannungsgerätes verbunden werden, so dass ein durchgängiges Barrierensystem 14 vom Durchführungsausgang 21 bis in die Durchführung 15 gegeben ist.The figure Fig. 2 shows a shield 10 with an additional barrier system 14 to a feedthrough output 21 for a high voltage electrical line. The dashed line represents the axis of rotation of the shield 10, the circular passage 15 and the circular outlet 16. Within the passage 15 a discharge 16 is arranged with a paper insulation 17, which is an electrical connection of the high voltage device with an external high voltage network, in particular a HVDC Network, allows. To the almost rectangular bushing outlet 21, the shield 10 is arranged such that a symmetrical about the vertex of the almost rectangular bushing outlet 21 coverage of both angles of the passage 15 and the boiler wall 20 is ensured. The additional barrier system 14 around the shield 10, in conjunction with the circulating oil within the high voltage electrical appliance and feedthrough 15, provides optimum electrical shielding of the corners of the feedthrough output 21. Advantageously, the barrier system 14 can shield the shield 10 within the feedthrough 15 and be connected to the electrical high voltage device, so that a continuous barrier system 14 is given from the lead-out 21 to the implementation 15.

Claims (12)

  1. Electrical screening apparatus (10) for an almost right-angled bushing output (21) of a bushing (15) of a high-voltage line into an outer wall (20) of an electrical high-voltage device, which apparatus has an electrically conductive screen interior (11) and a curved circular segment having two limbs (23), which segment can be arranged around the almost right-angled bushing output (21) such that one limb (23) is aligned almost parallel to the bushing (15) and the other limb (23) is aligned almost parallel to the outer wall (20), characterized in that the screen interior comprises an outer insulating layer (12) which surrounds the screen interior (11) and a barrier system (14) consisting at least of a barrier is provided for additional electrical insulation.
  2. Screening apparatus according to Claim 1, characterized in that the screen interior (11) has a tubular cross section.
  3. Screening apparatus according to one of Claims 1 or 2, characterized in that the position thereof relative to the almost right-angled bushing output (21) can be chosen so that the radius (22) of the curved circular segment runs through the almost right angle of the bushing output (21).
  4. Screening apparatus according to one of Claims 1 to 3, characterized in that the form thereof corresponds to an idealized characteristic of the electrical field of the area around the almost right-angled bushing output (21).
  5. Screening apparatus according to one of Claims 1 to 4, characterized in that the radius (22) of the curved circular segment is less than four times the length of the limbs (23).
  6. Screening apparatus according to one of Claims 1 to 5, characterized in that the radius (22) of the curved circular segment is between 10 mm and 500 mm, preferably 100 mm.
  7. Screening apparatus according to Claim 1, characterized in that the barrier system (14) can be connected to a barrier system (18) of the high-voltage device, which barrier system is arranged within the bushing (15) and/or within the outer wall (20).
  8. Screening apparatus according to one of Claims 1 to 7, characterized by a fixing device by means of which it can be connected to the outer wall (20) and/or the bushing (15).
  9. Screening apparatus according to one of Claims 1 to 8, characterized in that said apparatus consists of segments which can be arranged at defined intervals around the bushing output (21).
  10. Screening apparatus according to one of Claims 1 to 9, characterized in that the screen interior (11) is connected to the electrical ground and therefore grounded.
  11. Screening apparatus according to one of Claims 1 to 10, characterized in that said apparatus consists at least partially of conductive material which can be partially interspersed with non-conductive material.
  12. Screening apparatus according to one of Claims 1 to 11, characterized in that said apparatus consists of a non-conductive carrier material which is at least partially sheathed with a conductive layer.
EP07787927.8A 2006-08-03 2007-07-26 Apparatus for electrical screening of a high-voltage bushing Not-in-force EP2047485B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006038221A DE102006038221B4 (en) 2006-08-03 2006-08-03 Device for electrical shielding of a high voltage feedthrough
PCT/EP2007/057701 WO2008015150A1 (en) 2006-08-03 2007-07-26 Apparatus for electrical screening of a high-voltage bushing

Publications (2)

Publication Number Publication Date
EP2047485A1 EP2047485A1 (en) 2009-04-15
EP2047485B1 true EP2047485B1 (en) 2016-08-31

Family

ID=38656696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07787927.8A Not-in-force EP2047485B1 (en) 2006-08-03 2007-07-26 Apparatus for electrical screening of a high-voltage bushing

Country Status (6)

Country Link
US (1) US8124878B2 (en)
EP (1) EP2047485B1 (en)
CN (1) CN101501789B (en)
BR (1) BRPI0714621B1 (en)
DE (1) DE102006038221B4 (en)
WO (1) WO2008015150A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR112013000495B1 (en) 2010-07-08 2022-01-11 Abb Schweiz Ag HIGH VOLTAGE SHIELDING DEVICE AND HIGH VOLTAGE INSULATION SYSTEM
EP2846336B1 (en) 2013-09-10 2016-05-04 Siemens Aktiengesellschaft Connection of at least four electrical conductors
DE102015224568A1 (en) * 2015-12-08 2017-06-08 Siemens Aktiengesellschaft Device for the electrical connection of at least four electrical conductors
CN105977887B (en) * 2016-06-01 2018-10-23 中国西电电气股份有限公司 A kind of inflatable ultrahigh voltage direct current wall bushing
EP3794913B1 (en) * 2018-05-17 2024-05-01 Hitachi Energy Ltd Shielding of high voltage equipment

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US6218627B1 (en) * 1998-02-04 2001-04-17 Hitachi, Ltd. Bushing

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US3173115A (en) 1962-10-26 1965-03-09 Westinghouse Electric Corp High voltage potential transformer
CH413030A (en) * 1963-01-15 1966-05-15 Inst Prueffeld Elekt High-voltage bushing in electrical equipment, especially in a low-liquid transformer
CH413020A (en) * 1963-12-23 1966-05-15 Gretag Ag Method and device for the production of electronic components
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JPS5354798A (en) * 1976-10-29 1978-05-18 Toshiba Corp Bushing
US4296274A (en) * 1980-07-11 1981-10-20 The United States Of America As Represented By The United States Department Of Energy High voltage bushing having weathershed and surrounding stress relief collar
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Also Published As

Publication number Publication date
EP2047485A1 (en) 2009-04-15
US20100065304A1 (en) 2010-03-18
DE102006038221A1 (en) 2008-02-07
WO2008015150A1 (en) 2008-02-07
CN101501789A (en) 2009-08-05
DE102006038221B4 (en) 2009-03-26
US8124878B2 (en) 2012-02-28
CN101501789B (en) 2012-01-04
BRPI0714621B1 (en) 2018-05-22
BRPI0714621A2 (en) 2013-04-30

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