WO2010142517A1

WO2010142517A1 - Current conductor arrangement

Info

Publication number: WO2010142517A1
Application number: PCT/EP2010/056803
Authority: WO
Inventors: Norbert Lüthy; Manfred Meinherz
Original assignee: Siemens Aktiengesellschaft
Priority date: 2009-06-12
Filing date: 2010-05-18
Publication date: 2010-12-16
Also published as: DE102009025565A1

Abstract

The invention relates to a current conductor arrangement comprising a conductor track (3) having a hollow cylindrical basic shape. By means of a conductor jacket, the conductor track (3) encloses a channel (6) which extends between a first and a second end (4, 5). The channel (6) can be accessed through the conductor jacket of the conductor track (3) via branch channels (8a, 8b, 8c, 9a, 9b, 9c) penetrating the conductor jacket. The branch channels (8a, 8b, 8c, 9a, 9b, 9c) are introduced into diametrically opposed sides of the conductor jacket and run in the direction of an extension axis (2) located between the first and second end (4, 5).

Description

description

The current conductor arrangement

The invention relates to a conductor arrangement with a extending between a first end and a second end, a channel enclosing a conductor shell, a hollow cylindrical basic shape having conductor, which has a plurality of conductor shell passing through passages through which the channel is accessible on the shell side and the channel and the branch channels are penetrated by an electrically insulating fluid.

Such a current conductor arrangement is known for example from the published patent application DE 23 63 819 A1. There, a tubular gas cable is described, which has an inner conductor having in the longitudinal direction at intervals arranged resilient intermediate pieces. The intermediate pieces are formed as helical elements.

By a spiraling a simplified deformation of the inner conductor is made possible. Due to the spiraling, the conductor cable is additionally subjected to an inductive resistance coating.

The inductive resistance pad adversely increases the impedance of the inner conductor.

It is therefore an object of the invention to provide a suitable Stromlei- teranordnung, which compared to the known construction has a reduced inductive resistance coating. According to the invention the object is achieved in a conductor arrangement with the features mentioned in the fact that a first branch channel and a second branch channel are arranged in diametrically opposite sides of the conductor shell in the direction of extending between the first and second end extension axis.

By introducing puncture channels into the conductor shell, on the one hand, the deformability of the conductor in this section is simplified. On the other hand, the surface of the circuit is additionally increased. With an increased surface area, heat of power generated within the circuit trace can be dissipated in an improved manner. As a result of the arrangement of branch channels in diametrically opposite sides, segment-shaped conductor remainders of the conductor run which lie between the branch channels and delimit them in the circumferential direction and which have a sufficient cross-sectional area in order to conduct electrical currents remain. The branch channels allow a relative movement of the adjacent segment-shaped conductor remainders to each other, so that a simplified deformability of the conductor is given. An occurring in a coiling of the conductor increase in impedance through an additionally introduced inductive resistance coating is prevented. Furthermore, there is the possibility, for example, by arranging two branch channels on diametrically opposite sides arranged therebetween conductor remainders in the form of a half-shell in the manner of a channel, so that only a limited impairment of the current carrying capacity of the overall arrangement is given by the branch channels.

Preferably, the extension axis between the two ends should have a linear course. Accordingly, the branch channels are provided with a linear course. It can but also be provided that between the two ends of the extension axis has any course, such as a curved course. Also in this case it is advantageous to let the branch channels follow this arcuate course. The extension axis and the branch channels are aligned parallel to each other regardless of their course.

A flow through the branch channels into the channel of the conductor inlet takes place from radial directions. In a rotationally symmetrical design of the hollow cylindrical basic shape of the conductor track corresponds to the extension axis of the Rotati ^¬ onsachse.

The extension axis and the branch channels span a surface, which should preferably lie in one plane. However, the surface can also be wound in itself in the manner of a band, which is bounded by the mutually parallel branch channels and defined in its course by the parallel extension axis.

The first branch channel and the second branch channel can also be configured such that several first or more second stitch channels continue to lie one behind the other in the direction of the extension axis, whereby webs remain between each individual first and respectively individual second branch channels Channels remaining conductor residues of the conductor to fix each other. The webs may for example be self-contained and the extension axis formed circumferentially.

Furthermore, it can be advantageously provided that the branch channels are slit-shaped linearly stretched arranged in the conductor shell. A slot-shaped configuration of the branch channels, which are inserted linearly, is particularly advantageous in the case of a linearly extending channel which is delimited, for example, by a hollow-cylindrical cross-section. In this case, along the extension axis through the branch channels Berei ^¬ che, which allow passage of electrically insulating fluid in the radial direction and a relative movement of the conductor residues located between the slots made possible. Thus, the conductor is deformable in itself, without losing its current conductor function. Thereby affect the ratio of the width of the line channels enced to the interim ^¬ rule underlying the branch ducts segment shaped conductor remains of the conductor shell deformability. A deformation should be made only to an extent that allow the puncture channels a fluid passage and a direct abutment located between the puncture channels segmental conductor remnants of the conductor shell is prevented.

Furthermore, it can be advantageously provided that the first and the second branch channel are aligned with each other in the conductor shell.

An aligned alignment of first and second branch channel makes it possible to end the ends of the branch channels each at diametrically opposite points along the extension axis, so that the ends of the first or second branch channel are bounded by each self-contained circumferential conductor jacket sections. These conductor jacket sections should preferably be formed as a hollow cylinder with a circular ring cross section. This makes it possible to arrange stabilizing webs within the conductor, which cause self-supporting properties of the conductor. A The flow direction of the branch channels is advantageously carried out both on the first and on the second branch channel parallel to the direction of escape of the two branch channels. In an aligned arrangement of a first and a second branch channel, the branch channels are aligned in the direction of escape congruent one behind the other to each other. It may be advantageous in this case that a plurality of first or a plurality of second puncture channels, each one behind the other in the direction of extension, are introduced into the conductor run, wherein the first branch channels or the second branch channels are spaced from each other and a spacing is provided by a circumferential conductor coat section of the conductor run ,

Furthermore, it can be advantageously provided that the conductor train is arranged in an electrically insulated manner within an encapsulating housing which encapsulates an electrically insulating fluid which circulates around the conductor run.

Encapsulation housings can be found, for example, in electrical energy transmission devices. For example, busbars are enclosed with encapsulating housings or switching devices are enclosed with encapsulating housings so that a conductor run is protected against direct external contact. The encapsulating housings are designed in such a way that they respectively surround a conductor line in a fluid-tight manner, so that the interior of the encapsulating housing can be filled with an electrically insulating fluid and can be kept limited within the encapsulating housing. A suitable electrically insulating fluid is, for example, an insulating gas or an insulating fluid such as an insulating oil. Particularly suitable as insulating gas are sulfur hexafluoride or nitrogen or corresponding insulating gas mixtures. Advantageously, the electrically insulating fluid in the interior of the encapsulating housing should be pressurized so that its electrically insulating properties are additionally positively influenced.

A further advantageous embodiment may provide that is reduced in cross-section at least one of the ends of the conductor shell with respect to a lying between the ends portion of the conductor shell.

Advantageously, the branch channels should be arranged in a central portion of the conductor, ie, a central portion of the channel is bounded by end portions of the conductor. The end-side sections of the conductor track are in each case at the first and at the second end and preferably have a relation to the wall thickness of dazwi- see lying portion of the conductor line reduced wall thickness. For example, it can be provided that a reduction of the wall thickness of the conductor run is provided at the first and / or at the second end such that, viewed from the respective end towards the other end, on the conductor jacket, preferably in the interior of the channel. a circumferential projecting shoulder is formed, which can serve as a stop. Thus, for example, it is possible to use in the section with reduced wall thickness a dome contact piece, which serves to connect a plurality of conductor tracks to an enlarged overall length having conductor. This dome contact pieces, for example, screwed ^¬, pressed, welded or inserted by means of a ande ^¬ ren suitable joining method, so that is possible through the dome contact pieces electrically viable and conductivity capable junction between abutting ends of conductor tracks. In the following an embodiment of the invention is shown in a schematic drawing and described in more detail below.

It shows the

1 shows a section in the longitudinal direction and a section in the transverse direction through a conductor arrangement, the

Figure 2 is a perspective view of a conductor in a first variant and a plan view of the conductor in the first variant and the

Figure 3 is a perspective view of a conductor in a second variant.

FIG. 1 shows a cross section through a conductor arrangement, wherein the conductor arrangement has a tubular encapsulation housing 1. The encapsulating housing 1 is made of a fluid-tight material. For example, the encapsulating housing 1 made of a metal, in particular a non-ferrous metal z. B. produced in a casting process. The encapsulating housing 1 has a tubular structure which extends coaxially about an extension axis 2. The encapsulating housing 1 is arranged coaxially to a Lei ^¬ terzug 3. The conductor 3 is aligned coaxially to the Erstre ^¬ ckungsachse 2. The conductor 3 has a hollow cylindrical basic shape, wherein the hollow cylindrical basic shape has annular cross-sections. The interior of the encapsulating housing 1 is filled with an electrically insulating fluid, preferably an insulating gas such as sulfur hexafluoride. The electrically insulating fluid is arranged inside the encapsulating housing 1 and closed in nem compared to the environment increased pressure applied. The conductor 3 is held by means of electrically insulating elements, which are not shown in the figure 1, spaced from the encapsulating 1.

The conductor 3 has a first end 4 and a second end 5. Between the two ends 4, 5 extends the extension axis 2. In the present example, the extension axis 2 is linearly stretched. However, it is also possible borrowed that the extension axis 2 maps any trajectory, the track 3 of this trajectory should be formed coaxially following this trajectory. Accordingly, in this case, the encapsulating housing 1 should be formed following a corresponding extending extension axis 2, so that further a coaxial arrangement of encapsulating 1 and 3 conductor is given.

The conductor 3 has a circular cylindrical jacket-shaped outer surface on the conductor shell. In the interior of the conductor, bounded by the conductor shell, a channel 6 is formed. The channel 6 has various cross-sections, these cross-sections should preferably be formed rotationally symmetrical to the extension axis 2. In the present case, the cross sections are selected such that each hollow cylindrical sections bound the channel, wherein the lying between the two ends 4, 5 central portion of the conductor 3 ei ^¬ nen opposite the first and second end 4, 5 conductor shell section has enlarged cross-section. At the two ends in each case a circumferential shoulder 7a, 7b are arranged, which each represent a stop. As a result, starting from the respective ends 4, 5 in the direction of the central portion of the channel 6, there is a possibility of inserting respective dome contact pieces into the two ends 4, 5 and electrically contacting them and via them Dome contact pieces further preferably structurally identical Leiterzü ^¬ ge 3 to couple together and to contact electrically. The dome contact pieces can be, for example, corresponding tubular threaded rods, which can be screwed, for example, into internal threads on the first or second end 4, 5. These dome contact pieces, for example, but also pressed, soldered, welded or otherwise electrically contacted be connected to the conductor 3.

In the central section of the channel 6 between the first and second ends 4, 5 are each a plurality of first and a plurality of second branch channels 8a, 8b, 8c; 9a, 9b, 9c arranged. The first and second branch channels 8a, 8b, 8c; 9a, 9b, 9c are each formed identically. The branch channels 8a, 8b, 8c; 9a, 9b,

9 c extend along the extension axis 2 and are each diametrically opposite in the conductor shell ^{¬ introduced} . The branch channels 8a, 8b, 8c; 9a, 9b, 9c each have a slot-shaped structure. Between the first branch channels 8a, 8b, 8c and between the second branch channels 9a, 9b, 9c, the conductor 3 is provided with annular encircling webs 10a, 10b. The hollow cylindrical webs 10a, 10b stabilize the conductor 3 in the central portion of the channel. This undesirable relative movements between the branch channels 8a, 8b, 8c; 9a, 9b, 9c limiting conductor residues of the conductor 3 avoided. Despite the stabilizing effect of the self-contained around the extension axis 2 encircling webs 10a, 10b, a relative movement within the conductor 3 is possible to a limited extent.

To avoid protruding edges located in the outer surface of the conductor strip 3 outlet openings of the branch channels 8a, 8b, 8c; 9a, 9b, 9c bephased, so that rounded transitions between the branch channels 8a, 8b, 8c; 9a, 9b, 9c are given in the outer circumferential surface of the conductor 3. The mouth openings of the branch channels 8a, 8b, 8c; 9a, 9b, 9c in the channel 6 are excluded from such a processing, since within this range at a voltage application of the conductor 3, a dielectrically shielded space is formed, which does not cause the emergence of partial discharge on projecting body edges.

Advantageously, the arrangement of first branch channels 8a, 8b, 8c, and second branch channels 9a, 9b, 9c should be provided in such a way that they face each other in an aligned manner, wherein the arrangement of further branch channels should be avoided around the extension axis 2 in the circuit of the conductor track 3. As a result, are half-shell-shaped or channel-like

Conductor remnants of the conductor train formed, which the branch channels 8a, 8b, 8c; 9a, 9b, 9c limit. In particular, with an alignment of the first and second branch channels 8a, 8b, 8c; 9a, 9b, 9c in a final mounting position of the Stromleitananord- tion one above the other, d. H. a vertical passes through the respective diametrically opposed first and second branch channels 8a, 8b, 8c; 9a, 9b, 9c, there is a possibility to allow an additional flow through the conductor strip 3 with the electrically insulating fluid within the encapsulating housing 1. Such a flow can be carried out, for example, by convection. The flow through the branch channels 8a, 8b, 8c; 9a, 9b, 9c takes place substantially transversely to the extension direction. A transverse direction of the flow through the branch channels 8a, 8b, 8c; 9a, 9b, 9c lies in the area defined by the branch channels 8a, 8b, 8c; 9a, 9b, 9c limited and in which the extension axis 2 lies.

FIG. 2 shows a perspective view of the first variant of the conductor track 3 known from FIG. know the alignment of the first branch channels 8a, 8b, 8c and second branch channels 9a, 9b, 9c in alignment with each other, these and the extension axis 2 are aligned parallel and lie in a common flat surface. In this flat surface is preferably in a mounting position one

Vertical. Furthermore, a plan view of a second branch channel 9c is shown in sections, which shows a phasing of a mouth opening in the outer lateral surface of the conductor track 3.

While the conductor 3 shown in Figures 1 and 2 is preferably arranged in a horizontal mounting position with respect to the extension axis 2, Figure 3 shows a second variant of another conductor 3a, which should preferably be used with its extension axis 2 in a vertical mounting position , The further conductor 3a has analogous to the conductor 3 according to Figures 1 and 2, a hollow cylindrical structure, again an annular cross-sectional choice was made. The location and number of branch channels 8d, 8e; However, 9d, 9e in the other conductor 3a is deviating from the conductor 3 known from FIG. In turn, the arrangement of first branch channels 8d, 8e and second branch channels 9d, 9e is provided, which in turn are formed like a slot and extend along the extension axis 2. However, it is now provided that the first and second branch channels 8d, 8e; 9d, 9e reinforced in the vicinity of the respective ends 4, 5 of the further conductor 3a are arranged. Thus, in a vertical arrangement at the first end 4, an inflow of fluid through there lower first and second branch channels 8d, 9d provided and an outflow of the fluid at the second end 5 by local top first and second branch channels 8d, 9d allows. By dispensing with an arrangement of branch channels in the central section of the further conductor track 3a, an improved Chimney effect inside the other conductor 3a given.

By a spaced arrangement of branch channels 8d, 9d in the direction of the ends 4, 5 of the further conductor track 3a is in the central portion, which is located between the ends 4, 5, a circumferential web 17c formed, which compared to that of Figures 1 and 2 known webs 10a, 10b has an enlarged axial length. As a result, a corresponding stronger stabilizing effect can be expected through the web 10c according to FIG. Thus, it is possible to support such shaped conductor tracks 3a at greater distances than one of a plurality of branch channels 8a, 8b, 8c; 9a, 9b, 9c exhibiting conductor 3 (Figures 1 and 2).

Of course, conductor tracks, which are provided over almost the entire length with branch channels, come in a vertical mounting position for use. As a result, a flow can be conveyed in the interior of the conductor in the direction of the extension phase. With regard to the configuration and arrangement of the other conductor cable 3a and the choice of an encapsulating that applies to the conductor 3 according to Figures 1 and 2 described.

The number of branch channels in the circuit of the conductor tracks can vary as needed. Furthermore, the dimensioning of the branch channels is variably executable.

Claims

claims

1. Conductor arrangement with a line (3, 3a) extending between a first end (4) and a second end (5) and enclosing a channel (6) by means of a conductor jacket, which has a hollow-cylindrical basic shape, which comprises a plurality of conductor sheaths 9a, 9b, 9c) through which the channel (6) is accessible on the shell side and the channel (6) and the branch channels (8a, 8b, 8c, 8d; 9a , 9b, 9c) are penetrated by an electrically insulating fluid, wherein a first puncture channel (8a, 8b, 8c) and a second puncture channel (9a, 9b, 9c) in diametrically opposite sides of the conductor sheath in the direction of between the first and second end ( 4, 5) extending Erstreckkachse (2) are arranged.

2. Conductor arrangement according to claim 1, characterized in that the branch channels (8a, 8b, 8c, 8d, 9a, 9b, 9c) are arranged linearly stretched in a slot shape in the conductor shell.

3. Current conductor arrangement according to claim 1 or 2, characterized in that the first and the second branch channel (8a, 8b, 8c, 8d; 9a, 9b, 9c) are aligned with each other in the conductor shell.

4. conductor arrangement according to one of claims 1 to 3, characterized in that the conductor strip (3, 3a) is arranged electrically isolated within a capsule housing (1), which encloses a Lei ^¬ terzug (3, 3a) lapping around electrically insulating fluid.

5. Conductor arrangement according to one of claims 1 to 4, d a d e r c h e c e in n e c e s that at least one of the ends (4, 5) of the conductor shell with respect to a lying between the ends (4, 5) portion of the conductor shell is reduced cross-section.