CA2779240A1 - Device for feeding a high voltage through a wall at ground potential - Google Patents
Device for feeding a high voltage through a wall at ground potential Download PDFInfo
- Publication number
- CA2779240A1 CA2779240A1 CA2779240A CA2779240A CA2779240A1 CA 2779240 A1 CA2779240 A1 CA 2779240A1 CA 2779240 A CA2779240 A CA 2779240A CA 2779240 A CA2779240 A CA 2779240A CA 2779240 A1 CA2779240 A1 CA 2779240A1
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- voltage
- gas
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- insulating
- insulated
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- 239000004020 conductor Substances 0.000 claims abstract description 47
- 239000012212 insulator Substances 0.000 claims description 19
- 238000004804 winding Methods 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims 2
- 239000011261 inert gas Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 6
- 229910018503 SF6 Inorganic materials 0.000 description 6
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 6
- 229960000909 sulfur hexafluoride Drugs 0.000 description 5
- 238000007789 sealing Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000005684 electric field Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Classifications
-
- 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
- H01F27/02—Casings
- H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
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Abstract
The invention relates to a device (1) for feeding a high voltage through a wall (17) which can be connected to ground potential having a first high-voltage bushing (2) which has a first high-voltage connection (5) and a first high-voltage conductor (8) which is connected to the first high-voltage connection (5) and extends through a first electrical insulating body (6), and a second high-voltage bushing (3) which has a second high-voltage connection (9) and a second high-voltage conductor (12) which is connected to the second high-voltage connection (9) and extends through a second electrical insulating body (16), wherein the first high-voltage conductor (8) and the second high-voltage conductor (12) are electrically connected to one another by means of a gas--insulated link (4) which has a wall-mounting section (18) which is equipped for mounting in the wall. The installation of the device is simplified by the link.
Description
Description Device for feeding a high voltage through a wall at ground potential The invention relates to a device for feeding a high voltage through a wall which can be connected to ground potential.
Such devices are already known from constant practice. For example, in order to feed out a high voltage from one part of a building to another part of the building or from a valve hall of a high-voltage DC transmission system to the outside, an air-insulated high-voltage conductor is carried over into an insulating gas atmosphere by means of a bushing. For this purpose, the bushing has an elongated insulator which is filled with insulating gas and projects through the wall. A high-voltage conductor extends in the insulator. A possible insulating gas is sulfur hexafluoride, for example, which has a high ionization energy, dielectric strength and favorable electronegative properties. Gas-free insulating bodies are also known. For example, a winding which has been produced by winding resin-impregnated or oil-impregnated paper webs onto the high-voltage conductor serves as an insulating body. The winding or winding body effects a controlled dissipation of the high electric field strengths and therefore prevents voltage flashovers between the conductor, which is at a high-voltage potential, and the housing wall, which is at a ground potential.
In currently known high-voltage DC transmission systems, converter valves are usually arranged in a valve hall. A feed-out system, which consists of two SF6 outdoor bushings which are rigidly coupled to one another, is provided in order to feed the high direct voltages out of the valve hall. The two coupled bushings each have an insulating body which extends in the longitudinal direction and at the free end of which the high-voltage connection is provided. A fixing connection, which can be connected to ground potential, is provided at the other end of the bushing. The insulating body consists of a hollow cylindrical insulator which is filled with gaseous sulfur hexafluoride. The two bushings are rigidly connected to one another at the fixing flange. With this concept, the bushings must be arranged so that they extend substantially at right angles to the wall on both sides of the wall of the valve hall.
When the bushings are aligned at an angle to the wall, the insulating body must be made longer to allow for the fact that the distance from the high-voltage connection to the valve hall wall is less than the distance to the fixing flange.
As operating voltages become ever higher, such rigidly coupled feed-out systems become ever larger due to the electrotechnical and mechanical sizing criteria, so that it is almost impossible to control the associated forces.
The object of the invention is therefore to provide a device of the kind mentioned in the introduction which can be arranged flexibly and cost-effectively on the housing wall.
The invention achieves this object by a device for feeding a high voltage through a wall which can be connected to ground potential having a first high-voltage bushing which has a first high-voltage connection and a first high-voltage conductor which is connected to the first high-voltage connection and extends through a first electrical insulating body, and a second high-voltage bushing which has a second high-voltage connection and a second high-voltage conductor which is connected to the second high-voltage connection and extends through a second electrical insulating body, wherein the first high-voltage conductor and the second high-voltage conductor are electrically connected to one another by means of a gas-insulated link which has a wall mounting section which is equipped for mounting in the wall.
According to the invention, the two high-voltage bushings are no longer rigidly coupled to one another. Rather, a gas-insulated link (GIL), which connects the two high-voltage bushings to one another, is provided. The device according to the invention is therefore subdivided into three sub-systems.
The said three sub-systems, namely the first high-voltage bushing, the second high-voltage bushing and the gas-insulated link, can be designed independently of one another. Within the scope of the invention, the high-voltage bushings also no longer need to be fixed at right angles to the wall through which the high voltage is to be fed. Rather, the gas-insulated link with its wall-mounting section is mounted in the wall, wherein the respective bushing can then be mounted at an appropriate distance from the wall and at any angle to the wall. The flexibility during installation and therefore the design of the device according to the invention has therefore been increased.
Advantageously, the gas-insulated link has a tubular sleeve filled with insulating gas and a connecting conductor which is held in the tubular sleeve by means of electrically insulating holding means, wherein the connecting conductor is electrically connected to the first and to the second high-voltage conductor and the tubular sleeve is connected to the first and to the second insulating body in a gas-tight manner. According to this advantageous improvement, the tubular sleeve is at a ground potential. The connecting conductor is galvanically connected to the first and to the second high-voltage conductor and is therefore at a high-voltage potential, for example 1000 kV, in operation. The insulating gas, for example sulfur hexafluoride, provides an adequately high dielectric strength between the tubular sleeve and the connecting conductor. At the same time, the diameter of the tubular sleeve has a magnitude which gives rise to inherent weights of the components concerned which can still be controlled in the course of normal civil engineering.
According to a preferred embodiment of the invention, the gas-insulated link is made up of gas-insulated link modules in a modular manner. The link modules have a tubular sleeve section, for example, which can be filled with gas. A link conductor section is supported in the tubular sleeve section or tubular sleeve fitting by means of insulating holding means.
Furthermore, fixing flanges are arranged at the ends of each tubular sleeve section. The tubular sleeve sections can be connected to one another in a gas-tight manner with the help of the fixing flanges. At the same time, this brings about a contact between the link conductor sections and therefore a galvanic connection between the said conductors. The tubular sleeve sections extend in a longitudinal direction, for example. As an alternative to this, the tubular sleeve sections are formed in the shape of an arc. An angled connection of the gas-insulated link is also possible within the scope of the invention by an appropriate design of the flanges or link modules. At this juncture, however, it is once again pointed out that, according to the invention, the gas-insulated link can have a curved or angled course even without link modules.
Expediently, the first high-voltage bushing has an outdoor connection for connecting an air-insulated high-voltage power line.
In an improvement in this regard, the first insulating body has a hollow cylindrical first insulator which is filled with insulating gas.
According to a further expedient improvement in this regard, a first fixing flange, by means of which the first high-voltage bushing is mechanically fixed in a gas-tight manner to the gas-insulated link, is attached to the insulator, wherein the distance between the first fixing flange and the first outdoor connection is chosen to be sufficiently large as to ensure an adequately high dielectric strength in an air environment.
According to the expedient embodiment of the invention in this regard, the first high-voltage bushing is a so-called air-insulating-gas bushing, wherein the insulating gas is expediently sulfur hexafluoride. Expediently, the air-insulating-gas bushing is connected by means of its hollow cylindrical insulator directly to the face of the tubular sleeve of the gas-insulated link. Gas-tight flange connections are expedient here.
According to a first variant of the invention, the gas chambers of the first high-voltage bushing and of the gas-insulated link are connected directly to one another. As an alternative to this, however, sealing means, which consist of a suitable insulating material and establish a sealing effect between the hollow cylindrical insulator and the first high-voltage conductor, can also be provided. This simplifies the installation of the device according to the invention.
Expediently, the second high-voltage bushing also has a second outdoor connection for connecting a second air-insulated high-voltage power line.
According to an improvement in this regard, the second insulating body also has a hollow cylindrical second insulator which is filled with insulating gas. In other words, according to this embodiment of the invention, two air-insulating-gas bushings, which are connected to one another by means of the gas-insulated link, are provided. At the same time, the tubular sleeve of the gas-insulated link is connected in a gas-tight manner to the hollow cylindrical insulator of the second bushing so that the two gas chambers of the second high-voltage bushing and of the gas-insulated link also communicate with one another. However, in this embodiment too, the gas chambers can be separated from one another by suitable sealing means.
Advantageously, a second fixing flange, by means of which the second high-voltage bushing is mechanically fixed in a gas-tight manner to the gas-insulated link, is attached to the second insulator, wherein the distance between the second fixing flange and the second outdoor connection is chosen to be sufficiently large as to ensure an adequately high dielectric strength in an air environment.
As an alternative to this, the second insulating body is a winding body which has electrically conducting inserts which are wound on the second high-voltage conductor and which are spaced apart from one another by means of impregnated insulating layers, wherein a fixing flange, which is connected to the gas-insulated link in a gas-tight manner, is attached to the winding body. High-voltage bushings with such winding bodies are well known to the person skilled in the art.
Possible insulating layers are paper layers, for example, which are immersed in oil after the winding process. In other words, the second high-voltage bushing is an oil-impregnated high-voltage bushing. As an alternative to this, however, the insulating layers, that is to say paper layers of the winding body for example, can have been immersed in liquid resin, wherein the resin has subsequently been cured. Such bushings have become known as resin-impregnated bushings. The second high-voltage conductor extends through the winding body and, at its one end which projects from the winding body, forms a transformer connection, for example, where it is connected to windings of a transformer. In doing so, the transformer connection is arranged inside the transformer housing in an oil bath of the transformer. At its opposite end to the transformer connection, the second high-voltage conductor is galvanically connected to the link conductor.
Further expedient embodiments and advantages of the invention are the subject matter of the following description of exemplary embodiments of the invention with reference to the figures of the drawing, wherein the same references refer to similarly acting components, and wherein Figure 1 shows a first exemplary embodiment of the device according to the invention, and Figure 2 shows a second exemplary embodiment of the device according to the invention.
Figure 1 shows a first exemplary embodiment of the device 1 according to the invention which has a first high-voltage bushing 2 and a second high-voltage bushing 3 which are connected to one another by means of a gas-insulated link 4.
The first high-voltage bushing 1 has a first outdoor connection for connecting an air-insulated high-voltage power line, which is not shown in the figure. The first outdoor connection 5 is therefore at a high-voltage potential during operation.
The outdoor connection 5 is fixed to an insulating body 6, which is designed in the form of a hollow cylindrical insulator which is filled with an insulating gas such as sulfur hexafluoride. The insulating body 6 is provided with external ribs in order to prevent creepage currents and partial discharges. A first fixing section 7 is arranged at the opposite end of the insulating body 6 from the outdoor connection 5. A first high-voltage conductor 8, which is electrically connected to the first outdoor connection 5, extends within the first insulating body 6.
The second high-voltage bushing 3 has a second outdoor connection 9, a second insulating body 10 and a second fixing flange 11. The second insulating body 10 is also designed in the form of a hollow cylindrical insulator which is filled with insulating gas, wherein a second high-voltage conductor, which is electrically connected to the second outdoor connection 9, extends therethrough. The first high-voltage conductor 8 and the second high-voltage conductor 12 are held in an electrically insulated manner within the insulator of the respective insulating body 6 or 10 respectively by means of insulating or holding means which are not shown in the figure, wherein in each case they extend centrally through the respective hollow cylindrical insulator.
The gas-insulated link 4 has link modules 13 which each have a tubular sleeve fitting 14, a flange connection 15 being formed at both ends of the tubular sleeve fitting 14. The tubular sleeve fittings 14 are connected to one another and to the first fixing flange 7 or to the second fixing flange 11 in a gas-tight manner by means of their flange connections 15. A
link conductor section 16, which is connected either to the first high-voltage conductor 8, the second high-voltage conductor 12 or a link conductor 16 of an adjacent link conductor module 13, extends within each tubular sleeve fitting 14. In this way, the outdoor connections 5 and 9 are electrically connected to one another. The tubular sleeve and flange connections of the link modules 13 are designed so that a curved or angled link 4 is provided. The link conductor sections 16 are also held in an insulated manner in the respective tubular sleeve section by means of insulators, which are not shown in the figure.
The device 1 extends through a wall 17 which is at a ground potential. The link module section 13 which is arranged within the wall 17 is designated here as wall-mounting section 18.
With the help of the link modules 13, the first and the second bushing 2, 3 can be sufficiently spaced from the wall 17 that, in spite of the parallel alignment of the insulating body 6 to the wall, for example, a sufficient distance is provided between the outdoor connection 5 or 9 respectively and the wall 17 that voltage flashovers are prevented. However, the vertical disposition of the high-voltage bushing 2 and the angled disposition of the second high-voltage bushing 3 simplifies installation. This is particularly of advantage with ever increasing voltages. The high-voltage bushings 2 and 3 can be designed individually without having to take into account particular types of installation in a wall, for example particular intended angles. Such an installation option also increases the seismic safety of such devices.
Figure 2 shows a further exemplary embodiment of the device according to the invention. This differs from the exemplary embodiment according to Figure 1 only in that the second high-voltage bushing 3 is not an air-insulating-gas bushing. Rather, the second high-voltage bushing 3 has a winding body 19 as an insulating body which has electrically conducting inserts which are spaced apart from one another by paper layers. The inserts and the paper layers have been wound on the second high-voltage conductor, of which only a transformer connection 20 can be seen extending out of the winding body 19 into an oil bath of a transformer 21 where it is connected to windings of the transformer 21 by connection means, which are not shown. At its end opposite the transformer 21, the second high-voltage conductor is connected to the link conductor 16 of the gas-insulated link 4. Furthermore, the second high-voltage bushing 3 has a fixing flange 22 which is at a ground potential and which, on the one hand, is connected securely to a tubular fitting 23 of the transformer 21 and, on the other, is connected to the fixing flange 15 of the end link module 13 in a gas-tight manner. The second high-voltage bushing 3 is therefore an insulating-gas-oil bushing.
Such devices are already known from constant practice. For example, in order to feed out a high voltage from one part of a building to another part of the building or from a valve hall of a high-voltage DC transmission system to the outside, an air-insulated high-voltage conductor is carried over into an insulating gas atmosphere by means of a bushing. For this purpose, the bushing has an elongated insulator which is filled with insulating gas and projects through the wall. A high-voltage conductor extends in the insulator. A possible insulating gas is sulfur hexafluoride, for example, which has a high ionization energy, dielectric strength and favorable electronegative properties. Gas-free insulating bodies are also known. For example, a winding which has been produced by winding resin-impregnated or oil-impregnated paper webs onto the high-voltage conductor serves as an insulating body. The winding or winding body effects a controlled dissipation of the high electric field strengths and therefore prevents voltage flashovers between the conductor, which is at a high-voltage potential, and the housing wall, which is at a ground potential.
In currently known high-voltage DC transmission systems, converter valves are usually arranged in a valve hall. A feed-out system, which consists of two SF6 outdoor bushings which are rigidly coupled to one another, is provided in order to feed the high direct voltages out of the valve hall. The two coupled bushings each have an insulating body which extends in the longitudinal direction and at the free end of which the high-voltage connection is provided. A fixing connection, which can be connected to ground potential, is provided at the other end of the bushing. The insulating body consists of a hollow cylindrical insulator which is filled with gaseous sulfur hexafluoride. The two bushings are rigidly connected to one another at the fixing flange. With this concept, the bushings must be arranged so that they extend substantially at right angles to the wall on both sides of the wall of the valve hall.
When the bushings are aligned at an angle to the wall, the insulating body must be made longer to allow for the fact that the distance from the high-voltage connection to the valve hall wall is less than the distance to the fixing flange.
As operating voltages become ever higher, such rigidly coupled feed-out systems become ever larger due to the electrotechnical and mechanical sizing criteria, so that it is almost impossible to control the associated forces.
The object of the invention is therefore to provide a device of the kind mentioned in the introduction which can be arranged flexibly and cost-effectively on the housing wall.
The invention achieves this object by a device for feeding a high voltage through a wall which can be connected to ground potential having a first high-voltage bushing which has a first high-voltage connection and a first high-voltage conductor which is connected to the first high-voltage connection and extends through a first electrical insulating body, and a second high-voltage bushing which has a second high-voltage connection and a second high-voltage conductor which is connected to the second high-voltage connection and extends through a second electrical insulating body, wherein the first high-voltage conductor and the second high-voltage conductor are electrically connected to one another by means of a gas-insulated link which has a wall mounting section which is equipped for mounting in the wall.
According to the invention, the two high-voltage bushings are no longer rigidly coupled to one another. Rather, a gas-insulated link (GIL), which connects the two high-voltage bushings to one another, is provided. The device according to the invention is therefore subdivided into three sub-systems.
The said three sub-systems, namely the first high-voltage bushing, the second high-voltage bushing and the gas-insulated link, can be designed independently of one another. Within the scope of the invention, the high-voltage bushings also no longer need to be fixed at right angles to the wall through which the high voltage is to be fed. Rather, the gas-insulated link with its wall-mounting section is mounted in the wall, wherein the respective bushing can then be mounted at an appropriate distance from the wall and at any angle to the wall. The flexibility during installation and therefore the design of the device according to the invention has therefore been increased.
Advantageously, the gas-insulated link has a tubular sleeve filled with insulating gas and a connecting conductor which is held in the tubular sleeve by means of electrically insulating holding means, wherein the connecting conductor is electrically connected to the first and to the second high-voltage conductor and the tubular sleeve is connected to the first and to the second insulating body in a gas-tight manner. According to this advantageous improvement, the tubular sleeve is at a ground potential. The connecting conductor is galvanically connected to the first and to the second high-voltage conductor and is therefore at a high-voltage potential, for example 1000 kV, in operation. The insulating gas, for example sulfur hexafluoride, provides an adequately high dielectric strength between the tubular sleeve and the connecting conductor. At the same time, the diameter of the tubular sleeve has a magnitude which gives rise to inherent weights of the components concerned which can still be controlled in the course of normal civil engineering.
According to a preferred embodiment of the invention, the gas-insulated link is made up of gas-insulated link modules in a modular manner. The link modules have a tubular sleeve section, for example, which can be filled with gas. A link conductor section is supported in the tubular sleeve section or tubular sleeve fitting by means of insulating holding means.
Furthermore, fixing flanges are arranged at the ends of each tubular sleeve section. The tubular sleeve sections can be connected to one another in a gas-tight manner with the help of the fixing flanges. At the same time, this brings about a contact between the link conductor sections and therefore a galvanic connection between the said conductors. The tubular sleeve sections extend in a longitudinal direction, for example. As an alternative to this, the tubular sleeve sections are formed in the shape of an arc. An angled connection of the gas-insulated link is also possible within the scope of the invention by an appropriate design of the flanges or link modules. At this juncture, however, it is once again pointed out that, according to the invention, the gas-insulated link can have a curved or angled course even without link modules.
Expediently, the first high-voltage bushing has an outdoor connection for connecting an air-insulated high-voltage power line.
In an improvement in this regard, the first insulating body has a hollow cylindrical first insulator which is filled with insulating gas.
According to a further expedient improvement in this regard, a first fixing flange, by means of which the first high-voltage bushing is mechanically fixed in a gas-tight manner to the gas-insulated link, is attached to the insulator, wherein the distance between the first fixing flange and the first outdoor connection is chosen to be sufficiently large as to ensure an adequately high dielectric strength in an air environment.
According to the expedient embodiment of the invention in this regard, the first high-voltage bushing is a so-called air-insulating-gas bushing, wherein the insulating gas is expediently sulfur hexafluoride. Expediently, the air-insulating-gas bushing is connected by means of its hollow cylindrical insulator directly to the face of the tubular sleeve of the gas-insulated link. Gas-tight flange connections are expedient here.
According to a first variant of the invention, the gas chambers of the first high-voltage bushing and of the gas-insulated link are connected directly to one another. As an alternative to this, however, sealing means, which consist of a suitable insulating material and establish a sealing effect between the hollow cylindrical insulator and the first high-voltage conductor, can also be provided. This simplifies the installation of the device according to the invention.
Expediently, the second high-voltage bushing also has a second outdoor connection for connecting a second air-insulated high-voltage power line.
According to an improvement in this regard, the second insulating body also has a hollow cylindrical second insulator which is filled with insulating gas. In other words, according to this embodiment of the invention, two air-insulating-gas bushings, which are connected to one another by means of the gas-insulated link, are provided. At the same time, the tubular sleeve of the gas-insulated link is connected in a gas-tight manner to the hollow cylindrical insulator of the second bushing so that the two gas chambers of the second high-voltage bushing and of the gas-insulated link also communicate with one another. However, in this embodiment too, the gas chambers can be separated from one another by suitable sealing means.
Advantageously, a second fixing flange, by means of which the second high-voltage bushing is mechanically fixed in a gas-tight manner to the gas-insulated link, is attached to the second insulator, wherein the distance between the second fixing flange and the second outdoor connection is chosen to be sufficiently large as to ensure an adequately high dielectric strength in an air environment.
As an alternative to this, the second insulating body is a winding body which has electrically conducting inserts which are wound on the second high-voltage conductor and which are spaced apart from one another by means of impregnated insulating layers, wherein a fixing flange, which is connected to the gas-insulated link in a gas-tight manner, is attached to the winding body. High-voltage bushings with such winding bodies are well known to the person skilled in the art.
Possible insulating layers are paper layers, for example, which are immersed in oil after the winding process. In other words, the second high-voltage bushing is an oil-impregnated high-voltage bushing. As an alternative to this, however, the insulating layers, that is to say paper layers of the winding body for example, can have been immersed in liquid resin, wherein the resin has subsequently been cured. Such bushings have become known as resin-impregnated bushings. The second high-voltage conductor extends through the winding body and, at its one end which projects from the winding body, forms a transformer connection, for example, where it is connected to windings of a transformer. In doing so, the transformer connection is arranged inside the transformer housing in an oil bath of the transformer. At its opposite end to the transformer connection, the second high-voltage conductor is galvanically connected to the link conductor.
Further expedient embodiments and advantages of the invention are the subject matter of the following description of exemplary embodiments of the invention with reference to the figures of the drawing, wherein the same references refer to similarly acting components, and wherein Figure 1 shows a first exemplary embodiment of the device according to the invention, and Figure 2 shows a second exemplary embodiment of the device according to the invention.
Figure 1 shows a first exemplary embodiment of the device 1 according to the invention which has a first high-voltage bushing 2 and a second high-voltage bushing 3 which are connected to one another by means of a gas-insulated link 4.
The first high-voltage bushing 1 has a first outdoor connection for connecting an air-insulated high-voltage power line, which is not shown in the figure. The first outdoor connection 5 is therefore at a high-voltage potential during operation.
The outdoor connection 5 is fixed to an insulating body 6, which is designed in the form of a hollow cylindrical insulator which is filled with an insulating gas such as sulfur hexafluoride. The insulating body 6 is provided with external ribs in order to prevent creepage currents and partial discharges. A first fixing section 7 is arranged at the opposite end of the insulating body 6 from the outdoor connection 5. A first high-voltage conductor 8, which is electrically connected to the first outdoor connection 5, extends within the first insulating body 6.
The second high-voltage bushing 3 has a second outdoor connection 9, a second insulating body 10 and a second fixing flange 11. The second insulating body 10 is also designed in the form of a hollow cylindrical insulator which is filled with insulating gas, wherein a second high-voltage conductor, which is electrically connected to the second outdoor connection 9, extends therethrough. The first high-voltage conductor 8 and the second high-voltage conductor 12 are held in an electrically insulated manner within the insulator of the respective insulating body 6 or 10 respectively by means of insulating or holding means which are not shown in the figure, wherein in each case they extend centrally through the respective hollow cylindrical insulator.
The gas-insulated link 4 has link modules 13 which each have a tubular sleeve fitting 14, a flange connection 15 being formed at both ends of the tubular sleeve fitting 14. The tubular sleeve fittings 14 are connected to one another and to the first fixing flange 7 or to the second fixing flange 11 in a gas-tight manner by means of their flange connections 15. A
link conductor section 16, which is connected either to the first high-voltage conductor 8, the second high-voltage conductor 12 or a link conductor 16 of an adjacent link conductor module 13, extends within each tubular sleeve fitting 14. In this way, the outdoor connections 5 and 9 are electrically connected to one another. The tubular sleeve and flange connections of the link modules 13 are designed so that a curved or angled link 4 is provided. The link conductor sections 16 are also held in an insulated manner in the respective tubular sleeve section by means of insulators, which are not shown in the figure.
The device 1 extends through a wall 17 which is at a ground potential. The link module section 13 which is arranged within the wall 17 is designated here as wall-mounting section 18.
With the help of the link modules 13, the first and the second bushing 2, 3 can be sufficiently spaced from the wall 17 that, in spite of the parallel alignment of the insulating body 6 to the wall, for example, a sufficient distance is provided between the outdoor connection 5 or 9 respectively and the wall 17 that voltage flashovers are prevented. However, the vertical disposition of the high-voltage bushing 2 and the angled disposition of the second high-voltage bushing 3 simplifies installation. This is particularly of advantage with ever increasing voltages. The high-voltage bushings 2 and 3 can be designed individually without having to take into account particular types of installation in a wall, for example particular intended angles. Such an installation option also increases the seismic safety of such devices.
Figure 2 shows a further exemplary embodiment of the device according to the invention. This differs from the exemplary embodiment according to Figure 1 only in that the second high-voltage bushing 3 is not an air-insulating-gas bushing. Rather, the second high-voltage bushing 3 has a winding body 19 as an insulating body which has electrically conducting inserts which are spaced apart from one another by paper layers. The inserts and the paper layers have been wound on the second high-voltage conductor, of which only a transformer connection 20 can be seen extending out of the winding body 19 into an oil bath of a transformer 21 where it is connected to windings of the transformer 21 by connection means, which are not shown. At its end opposite the transformer 21, the second high-voltage conductor is connected to the link conductor 16 of the gas-insulated link 4. Furthermore, the second high-voltage bushing 3 has a fixing flange 22 which is at a ground potential and which, on the one hand, is connected securely to a tubular fitting 23 of the transformer 21 and, on the other, is connected to the fixing flange 15 of the end link module 13 in a gas-tight manner. The second high-voltage bushing 3 is therefore an insulating-gas-oil bushing.
Claims (11)
1. A device (1) for feeding a high voltage through a wall (17) which can be connected to ground potential having a first high-voltage bushing (2) which has a first high-voltage connection (5) and a first high-voltage conductor (8) which is connected to the first high-voltage connection (5) and extends through a first electrical insulating body (6), and a second high-voltage bushing (3) which has a second high-voltage connection (9) and a second high-voltage conductor (12) which is connected to the second high-voltage connection (9) and extends through a second electrical insulating body (16), wherein the first high-voltage conductor (8) and the second high-voltage conductor (12) are electrically connected to one another by means of a gas-insulated link (4) which has a wall-mounting section (18) which is equipped for mounting in the wall.
2. The device (1) as claimed in claim 1, characterized in that the gas-insulated link (4) has a tubular sleeve (14) filled with inert gas and a connecting conductor (16) which is supported in the tubular sleeve (14) by means of electrically insulating holding means, wherein the connecting conductor (16) is electrically connected to the first (8) and to the second high-voltage conductor (12) and the tubular sleeve (14) is connected to the first (6) and to the second insulating body (10) in a gas-tight manner.
3. The device (1) as claimed in claim 1 or 2, characterized in that the gas-insulated link (4) is made up of gas-insulated link modules (13) in a modular manner.
4. The device (1) as claimed in one of the preceding claims, characterized in that the first high-voltage bushing (2) has an outdoor connection (5) for connecting an air-insulated high-voltage power line.
5. The device (1) as claimed in claim 4, characterized in that the first insulating body (6) has a hollow cylindrical first insulator which is filled with insulating gas.
6. The device (1) as claimed in claim 5, characterized in that a first fixing flange (7), by means of which the first high-voltage bushing (2) is mechanically fixed in a gas-tight manner to the gas-insulated link (4), is attached to the first insulator (6), wherein the distance between the first fixing flange (7) and the first outdoor connection (5) is chosen to be sufficiently large as to ensure an adequately high dielectric strength in an air environment.
7. The device (1) as claimed in one of the preceding claims, characterized in that the second high-voltage bushing (3) has a second outdoor connection (9) for connecting a second air-insulated high-voltage power line.
8. The device (1) as claimed in claim 7, characterized in that the second insulating body (10) has a hollow cylindrical second insulator which is filled with insulating gas.
9. The device (1) as claimed in claim 8, characterized in that a second fixing flange (11), by means of which the second high-voltage bushing (3) is mechanically fixed in a gas-tight manner to the gas-insulated link (4) , is attached to the second insulator (10), wherein the distance between the second fixing flange (11) and the second outdoor connection (9) is chosen to be sufficiently large as to ensure an adequately high dielectric strength in an air environment.
10. The device (1) as claimed in one of claims 1 to 6, characterized in that the second insulating body is a winding body (19) which has electrically conducting inserts which are wound on the second high-voltage conductor (12) and which are spaced apart from one another by means of impregnated insulating layers, wherein a fixing flange (22), which is connected to the gas-insulated link (4) in a gas-tight manner, is attached to the winding body (19).
11. The device (1) as claimed in claim 10, characterized in that the insulating layers are oil-impregnated insulating layers.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011077190A DE102011077190A1 (en) | 2011-06-08 | 2011-06-08 | Device for passing a high voltage through a wall to earth potential |
| DE102011077190.5 | 2011-06-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2779240A1 true CA2779240A1 (en) | 2012-12-08 |
| CA2779240C CA2779240C (en) | 2020-05-26 |
Family
ID=47220374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2779240A Active CA2779240C (en) | 2011-06-08 | 2012-06-06 | Device for feeding a high voltage through a wall at ground potential |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN102820632B (en) |
| CA (1) | CA2779240C (en) |
| DE (1) | DE102011077190A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187686A (en) * | 2013-04-01 | 2013-07-03 | 山东彼岸电力科技有限公司 | Extra-high-pressure wall bushing |
| CN106025963B (en) * | 2016-05-25 | 2017-07-18 | 国网山东省电力公司莱芜供电公司 | The 10kV switchgear houses service drop combination fastener of antiseep |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT235926B (en) * | 1961-08-08 | 1964-09-25 | Haefely & Cie Ag Emil | High voltage electrical feedthrough |
| DE2708359C3 (en) * | 1977-02-23 | 1980-07-31 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Indoor high-voltage switchgear |
| DE19604342A1 (en) * | 1995-05-20 | 1996-11-21 | Abb Patent Gmbh | High voltage switching device |
| DE29707899U1 (en) * | 1997-05-05 | 1998-09-17 | HSP Hochspannungsgeräte Porz GmbH, 51145 Köln | Wall bushing |
| DE10032656B4 (en) * | 2000-06-28 | 2008-11-27 | Siemens Ag | Outdoor high voltage bushing and high voltage switchgear with such a bushing |
| CN1195304C (en) * | 2002-10-08 | 2005-03-30 | 黄维枢 | Epoxy resin dipping fibre high voltage insulation core body |
| CN101359818B (en) * | 2008-09-28 | 2012-02-08 | 北京网联直流工程技术有限公司 | Method and apparatus for inhibiting non-uniform rain lightning by high-voltage through-wall sleeve |
-
2011
- 2011-06-08 DE DE102011077190A patent/DE102011077190A1/en not_active Withdrawn
-
2012
- 2012-06-06 CA CA2779240A patent/CA2779240C/en active Active
- 2012-06-07 CN CN201210186584.7A patent/CN102820632B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102011077190A1 (en) | 2012-12-13 |
| CN102820632A (en) | 2012-12-12 |
| CA2779240C (en) | 2020-05-26 |
| CN102820632B (en) | 2017-05-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20170425 |