EP3371867A1

EP3371867A1 - Pylon system and method for extending the electrical transmission capacity of a pylon system

Info

Publication number: EP3371867A1
Application number: EP16785459.5A
Authority: EP
Inventors: Daniel Bartminn
Original assignee: Innogy SE
Current assignee: Innogy SE
Priority date: 2015-11-03
Filing date: 2016-10-21
Publication date: 2018-09-12
Also published as: US20180323596A1; WO2017076665A1; DE102015221553A1

Abstract

The present invention discloses a pylon system having at least two pylons (1) to each of which at least one insulator (2) is fitted, and having at least one first overhead-line conductor (10), suspended from each of the insulators (2), that is tensioned between the at least two pylons (1), characterized in that the pylon system comprises at least one second overhead-line conductor (20) that is suspended from the respective insulators (2) and is in direct electrical contact with the first overhead-line conductor (10) at least in sections. Further, the present invention discloses a method for extending the electrical transmission capacity of a pylon system that comprises at least two pylons (1) and at least one first overhead-line conductor (10) tensioned between the pylons (1), wherein the first overhead-line conductor (10) is fitted to a respective insulator (2) mounted on the pylon (1), the method comprising a method step for fitting a second overhead-line conductor (20) to the two pylons (1) such that the second overhead-line conductor (20) is in direct electrical contact with the first overhead-line conductor (10) at least in sections.

Description

Overhead transmission system and method for extending the electrical transmission capacity of an overhead transmission system

The present invention relates to an overhead line system and a method for expanding the electrical transmission capacity of a

Pylon system.

Overhead mast systems also include several as power poles

significant overhead poles for suspending electrical overhead lines, which are also referred to as ladder cables. On the power poles insulators are provided, which are arranged between the respective transmission towers and the conductor cables, wherein the conductor cables are suspended from the insulators, so that the transmission towers are electrically separated from the conductor cables. Overhead masts are used to transmit electrical energy over long distances. In particular, in the production of electrical energy via renewable energy sources, such as wind power, the power generation plants are often far away from the energy consumers, such as energy-intensive industrial plants. When expanding and / or expanding the power generation plants more electrical energy must be transported. Consequently, it is desirable to be able to transmit more electrical energy over existing overhead transmission systems. In overhead line mast systems known from the prior art, the conductor cables usually have a circular cross section. Among other things, the conductor cables are also exposed to wind loads that are on the

Transmission towers are transmitted. To increase the electrical

Transmission capacity of the overhead line systems, the cross sections of the conductors must be increased, which leads to corresponding proportionally increased wind loads of the conductors and the transmission towers. Thus, an expansion of the electrical transmission capacity of existing overhead transmission systems is not readily possible. The present invention is based on the object

Overhead mast system to provide an increased electrical

Transmission capacity, and related to its electrical

Transmission capacity is exposed to reduced wind loads. It is another object of the present invention to provide a method for expanding the electrical transmission capacity of an existing overhead transmission system.

The object underlying the present invention is achieved by a

Overhead mast system with the features of claim 1 solved. Advantageous embodiments are in the dependent of claim 1 claims

described. Furthermore, the object underlying the present invention by a method for extending the electrical

Transmission capacity of a transmission line system with the features of claim 10 solved. Advantageous embodiments of the method are described in the claims dependent on claim 10.

More specifically, the object underlying the present invention is achieved by an overhead line system comprising at least two transmission towers, to each of which at least one insulator is mounted, wherein the overhead line system further comprises at least one of the insulators

suspended first conductor cable that between the at least two

Overhead pylons is stretched. The overhead line system further comprises at least one second conductor cable, which is suspended from the respective insulators and at least partially in direct electrical contact with the first conductor cable.

The second conductor cable is designed to transmit the same current phase as the first conductor cable. Of course, the overhead line mast system according to the invention may preferably have a number of first conductor cables and second conductor cables corresponding to the number of current phases.

The overhead line system according to the invention has an increased electrical transmission capacity, since the same through the second conductor cable Electric current phase as the first conductor transmits effectively to the

Available conductor cross section is increased. The wind load on the transmission towers is not proportional but increased proportionately less than the available conductor cross sections of the first conductors and second conductors.

Preferably, the first conductor cable and the second conductor cable are each suspended separately from the respective insulators. This offers the advantage of having one

Replacement of the first and / or the second conductor cable is separately possible without the respective other conductor cable must be replaced. Consequently, the

Maintenance of the overhead line system according to the invention are made easier and more efficient.

Further preferably, the overhead line mast system is designed such that the first conductor cable with the second conductor cable between the respective

Overhead pylons is connected by means of at least one retaining clip.

As a result, the positioning of the second conductor to the first conductor can be fixed in an improved manner, so that the conductors, depending on the wind direction, offer each other a slipstream, whereby the wind load on the respective

Conductor cables and thus reduced to the transmission towers. Furthermore, by providing the retaining clips, the electrical contact between the first conductor cable and the second conductor cable is ensured. Further preferably, the overhead line mast system is designed such that the second conductor cable is arranged along the longitudinal extent thereof, horizontally next to the first conductor cable.

This reduces the wind load on the respective conductor cables and thus on the

Electricity pylons again. Because winds to which the conductors are exposed, usually run horizontally, so depending on the wind direction, the conductors provide each other a slipstream. Through a horizontal

Arrangement of the second conductor cable next to the first conductor cable, the

Air resistance can even be reduced because the cross-sectional shape of the Ladder system consisting of the first conductor and the second conductor similar to an ellipsoid and thus has a lower coefficient of drag than a conduit having a circular cross-section. Further preferably, the overhead line mast system is designed such that the second conductor cable spirally wound around the first conductor cable along the longitudinal extent of the first conductor cable.

The helical wrapping of the first conductor through the second conductor reduces the overall aerodynamic resistance of the conductor system consisting of the first conductor and the second conductor. Further, a tendency for vortex formation by lateral impact of the wind on the conductor system consisting of the first conductor and the second conductor is reduced, thereby further reducing the wind load on the conductor system.

Preferably, the overhead line mast system is designed such that the first conductor cable and / or the second conductor cable each have a circular cross-section. The ratio of cross-sectional area to the outer surface of a circular conductor cable is optimal.

Further preferably, the overhead line mast system is designed such that the second conductor cable has a concave outer contour section, wherein the second conductor cable is arranged with respect to the first conductor cable such that the concave outer contour section convex in cross-section

formed outer contour portion of the first conductor cable is arranged opposite.

In this case, the second conductor cable preferably hugs the first conductor cable. Preferably, the concave outer contour portion of the second conductor cable is formed as a contact portion. In this case, then the convex outer contour portion of the first conductor cable is also formed as a contact portion. The concave contact portion of the second conductor cable is then in direct electrical contact with the convex

Outer contour section of the first conductor cable.

In a corresponding embodiment of the conductor system comprising the first conductor cable and the second conductor cable, the positioning of the second conductor cable relative to the first conductor cable is due to the fitting of the second conductor cable

Conductor improved on the first conductor. In addition, the drag coefficient of the conductor system thus formed is reduced. Further preferably, the overhead line mast system is designed such that a gap between the first conductor cable and the second conductor cable is filled by means of a filling compound.

By providing a filling compound in the intermediate space between the first conductor cable and the second conductor cable, the drag coefficient of the conductor system formed from the first conductor cable and the second conductor cable is further reduced. Furthermore, a vortex formation is counteracted by laterally impinging wind on the conductor system. Both reduce the wind load of the conductor system and thus the wind load of the transmission towers to which the first conductor and the second conductor are attached. Furthermore, the filling compound can be used for fastening the second conductor cable to the first conductor cable. As a material for backfilling, for example, an epoxy resin, a

Silicone elastomer (e.g., silicone and / or fluorosilicone), ethylene-propylene-diene rubber (EPDM), polyurethane, and / or nitrile rubber (NBR, Nitrile Butadiene Rubber) may be used.

Further preferably, the overhead line mast system is designed such that the filling compound is electrically conductive. As a result, the conductor cross section of

Ladder system consisting of the first conductor and the second conductor increased again, so that the ratio of cross-sectional area to

Outside surface of the conductor system is further improved.

As a material for backfilling, for example, an epoxy resin, a

Silicone elastomer (eg silicone and / or fluorosilicone), ethylene-propylene-diene Rubber (EPDM), polyurethane and / or nitrile rubber (NBR, English: Nitrile Butadiene Rubber) are used, wherein the respective backfill material with electrically conductive components, such as metal strands and / or carbon and / or nickel and / or nickel-plated graphite beads and / or

Silver-coated glass beads and / or silver-coated nickel particles and / or silver-coated aluminum particles and / or silver-coated copper particles and / or silver may be provided.

The object underlying the present invention is also achieved by a method for expanding the electrical transmission capacity of a

Solved overhead line system, wherein the overhead line system comprises at least two transmission towers and at least one stretched between the transmission towers first conductor cable, wherein the first conductor cable is attached to a respective one attached to the transmission towers insulator, wherein the

Method comprises a method step for attaching a second conductor to the two overhead lines such that the second conductor is at least partially in direct electrical contact with the first conductor. By the method according to the invention, the electrical

Transmission capacity of the overhead line system can be increased without necessarily increasing the wind load on a conductor system consisting of the first conductor and the second conductor in proportion to the conductor cross-sectional area of the conductor system. To Beseilung the overhead line mast system, for example, a spindle carriage can be used, which is suspended on the first conductor cable and it moves along the first conductor cable, while the second conductor cable attached to the first conductor cable.

Preferably, the method comprises a method step for filling a gap between the first conductor cable and the second conductor cable with a filling compound. The filling of the gap with the filling compound can be done for example by a trailing carriage or a trailing arm of a spindle carriage. Further advantages, details and features of the invention will become apparent from the illustrated embodiments. This show in the

FIG. 1 shows a schematic representation of a device according to the invention

Pylon system;

Figure 2: a schematic sectional view of a conductor system

first embodiment of the invention

Pylon system; and

Fig. 3: a schematic sectional view of a conductor system

second embodiment of the invention

Pylon system.

In the following description, like reference numerals denote like components or like features, so that a description made with respect to a figure with respect to a component also applies to the other figures, so that a repetitive description is avoided.

FIG. 1 schematically shows an inventive device

Overhead mast system shown. The overhead line system comprises at least two transmission towers 1, to each of which a plurality of

Insulators 2 is mounted, from each of which conductor cables 10, 20 are suspended, so that the conductor cables 10, 20 are electrically isolated from the electrical transmission towers 1. At the top of the transmission towers 1, a rather grounding cable 3 is provided that is stretched between the transmission towers 1. The earthing cable 3 serves to absorb voltage spikes, which can occur, for example, via a lightning strike.

Although not apparent from Figure 1, the conductor cables 10, 20 are formed in two pieces. For power transmission, a first conductor 10 and second conductor 20 are used. Here are the first conductor 10 and the second Conductor 20 at least partially in direct electrical contact with each other.

FIG. 2 schematically shows a conductor system consisting of the first conductor cable 10 and the second conductor cable 20 in cross-section. It can be seen that the second conductor 20 is in direct electrical contact with the first conductor 10. Furthermore, it can be seen from FIG. 2 that the second conductor cable 20 is arranged horizontally next to the first conductor cable 10 along the longitudinal extent of the conductor cables 10, 20. Since the second conductor 20 is positioned horizontally next to the first conductor 10, in the event of a lateral impact of wind on the conductor system consisting of the first conductor 10 and the second conductor 20, one of the conductors 10, 20 in the lee of the other conductor 10, 20th are located. This reduces the air resistance coefficient of the conductor system, whereby the conductor system is exposed to lower wind loads, which in turn leads to a lower wind load of the transmission towers 1.

From Figure 2 it can be seen that the first conductor 10 and the second conductor 20 each have a circular cross-section. A gap 40 between the first conductor 10 and the second conductor 20 is filled by means of a filling compound 50. The filling compound 50 may be a

Epoxy resin act. Preferably, the filling compound 50 is an epoxy resin provided with metal strands, so that the filling compound 50 is electrically conductive. Furthermore, as the electrically conductive filling compound 50, a silicone elastomer can be used, which is provided with electrically conductive components in the form of strands and / or particles. The silicone elastomer may be silicone and / or fluorosilicone. Furthermore, the electrically conductive filling compound 50 may be EPDM (ethylene-propylene-diene rubber) and / or polyurethane and / or NBR (nitrile rubber, English: nitrile butadiene rubber). The electrically conductive constituents may be carbon and / or nickel and / or nickel-plated graphite spheres and / or

Silver-coated glass beads and / or silver-coated nickel particles and / or silver-coated aluminum particles and / or silver-coated copper particles and / or silver. As a result, the available line cross-section of the conductor system consisting of the first conductor cable 10, the second conductor 20 and the filling material 50 are increased again.

At the same time, the air resistance coefficient of the conductor system is reduced by filling the gap 40 between the first conductor cable 10 and the second conductor cable 20, since vortex formation is counteracted by laterally impinging wind.

It can also be seen from FIG. 2 that the first conductor cable 10 and the second conductor cable 20 are connected to one another by means of a retaining clip 30. Between two transmission towers, the conductor cables 10, 20 with several

Retaining clip 30 may be connected.

FIG. 3 shows a schematic sectional illustration of a conductor system of a further embodiment of the overhead line system according to the invention. The first conductor cable 10 has a circular cross-section, so that the first conductor cable 10 has a convex outer cross-section formed in section 1 1. The second conductor 20, however, also has a concave cross-section outer contour portion 21. In this case, the concave outer contour portion 21 nestles against the convex

Outside contour portion 1 1 of the first conductor 10 at. From Figure 3 it can be seen that a direct contact between the first conductor 10 and the second conductor 20 is realized by the convex outer contour portion 1 1 of the first conductor and the concave outer contour portion 21 of the second conductor. Thus, the first conductor 10 and the second conductor 20 via the convex outer contour portion 1 1, which may also be referred to as the first contact region 1 1 of the first conductor 10, and the concave outer contour portion 21, also referred to as the second contact region 21 of the second conductor 20 can be electrically connected.

It can also be seen from FIG. 3 that the intermediate space 40 between the first conductor cable 10 and the second conductor cable 20 is filled by a filling compound 50. The filler material 50 is preferably an epoxy resin, a silicone elastomer (e.g., silicone and / or fluorosilicone), EPDM, polyurethane, and / or NBR. Further preferably, the filling compound 50 is electrically conductive

Ingredients, such as metal strands, carbon and / or nickel and / or nickel-plated graphite beads and / or silver-coated glass beads and / or silver-coated nickel particles and / or silver-coated

Provided aluminum particles and / or silver-coated copper particles and / or silver, so that the filling material 50 can also be used for the electrical conduction of electricity, whereby the line cross-section of the conductor system consisting of the first conductor 10, the second conductor 20 and the filling material 50 increases again , Further, by filling the gap 40 between the first conductor 10 and the second conductor 20 of the

Drag coefficient of the ladder system is reduced, which reduces the wind loads on the ladder system and thus on the transmission towers. Furthermore, turbulence is reduced by laterally impinging wind on the ladder system.

Although not apparent from FIG. 3, the second conductor 20 preferably spirally wound around the first conductor 10 along the longitudinal extent of the first conductor 10. By a corresponding arrangement of the second conductor 20 with respect to the first conductor 10, a vortex formation of the conductor system consisting of the first conductor 10 and the second conductor 20 is further reduced. This reduces the wind loads on the

Ladder system and on the overhead line system.

LIST OF REFERENCE NUMBERS

1 transmission tower

2 insulator

3 earthing rope

10 first conductor cable

1 1 convex outer contour section / contact area (of the first conductor cable)

20 second conductor cable

21 concave outer contour section / contact area (of the second conductor cable) 30 retaining clip

40 intermediate space (between first conductor cable and second conductor cable)

50 filling material

Claims

claims

1 . Overhead mast with at least two transmission towers (1) to each of which at least one insulator (2) is mounted, and with at least one of the insulators (2) suspended first conductor (10), which is stretched between the at least two transmission towers (1) , characterized in that the overhead line system comprises at least a second conductor (20) which is suspended from the respective insulators (2) and at least partially in direct electrical contact with the first conductor (10).

2. overhead line system according to claim 1, characterized in that the first conductor cable (10) and the second conductor cable (20) are each suspended separately from the respective insulators (2).

3. overhead line system according to one of the preceding claims, characterized in that the first conductor cable (10) with the second conductor cable (20) between the transmission towers (1) by means of at least one retaining clip (30) are connected.

4. overhead line system according to one of the preceding claims, characterized in that the second conductor cable (20) along its longitudinal extent is arranged horizontally next to the first conductor cable (10).

5. overhead line system according to one of claims 1 to 3, characterized in that the second conductor cable (20), the first conductor cable (10) along the longitudinal extent of the first conductor cable (10) spirally wound around this.

6. overhead line system according to one of the preceding claims, characterized in that the first conductor cable (10) and the second conductor cable (20) each have a circular cross-section.

7. overhead line system according to one of claims 1 to 5, characterized in that the second conductor cable (20) has a concave cross-section Outer contour portion (21), wherein the second conductor cable (20) with respect to the first conductor cable (10) is arranged such that the concave outer contour portion (21) is arranged opposite a cross-sectionally convex outer contour portion (1 1) of the first conductor cable (10) opposite ,

8. overhead line system according to one of the preceding claims, characterized in that a gap (40) between the first conductor cable (10) and the second conductor cable (20) by means of a filling compound (50) is filled.

9. overhead line system according to claim 8, characterized in that the filling compound (50) is electrically conductive.

10. A method for expanding the electrical transmission capacity of an overhead line system comprising at least two transmission towers (1) and at least one tensioned between the transmission towers (1) first conductor cable (10), wherein the first conductor cable (10) on each one of the transmission towers (1 Attached insulator (2) is mounted, wherein the method comprises a step of attaching a second conductor cable (20) to the two

Overhead masts (1) such that the second conductor cable (20) with the first

Conductor rope (10) is at least partially in direct electrical contact.

1 1. A method according to claim 10, characterized in that the method comprises a method step for filling a gap (40) between the first conductor cable (10) and the second conductor cable (20) with a filling compound (50).