Tower or tower segment, wind turbine and method

Abstract

A tower (6) or tower segment (7,8,9) of a wind turbine (1) includes: a tower wall (47) enclosing an internal space (46) of the tower; a first duct (14) disposed within the internal space (46) and extending in a vertical direction (L) along the tower (6) or tower segment (7,8,9); and a first high-voltage cable (114) extending through the first duct (14). In this way, the high-voltage cable is effectively guided through the tower or tower segment, thereby avoiding the need to clamp the high-voltage cable at close intervals.

Description

Technical Field

[0001] The present invention relates to a tower or tower section for a wind turbine, a wind turbine, and a method for manufacturing the tower or tower section. Background Technology

[0002] Over the years, the annual energy production of wind turbines has been increasing. To efficiently transfer energy from wind turbines to the grid, the use of transmission voltages such as 66 kV has become common practice. This is particularly suitable for offshore wind turbines. This high voltage has a positive impact on cable losses and efficiency. Therefore, step-up transformers are installed in the nacelle of the wind turbine to convert the generated wind power into the required kilovolt level voltage. High-voltage cables are used to electrically connect the transformers to submarine cables, etc.

[0003] Due to the need for higher power output from wind turbines, the number of high-voltage cables within the towers has increased. Handling high-voltage cables within the towers during insulation and replacement is a time-consuming operation. Until now, the common practice has been to use a winch to pull the high-voltage cables up. The cables are then installed on what are called cable ladders, which extend vertically through the tower. The high-voltage cables are attached to the cable ladders using clamps spaced no more than 1.2 meters apart. Therefore, hundreds of high-voltage cable clamps (e.g., 300 to 400 clamps) need to be attached to securely hold a single high-voltage cable, preventing any movement. If three voltage cables need to be installed within a tower, additional cable ladders are typically required. This further increases costs. In the event of a fire, the high-voltage cables are not protected or isolated from each other. For example, if a high-voltage cable is short-circuited, there is a risk of fire spreading to nearby objects. Furthermore, braking systems are used to hold the high-voltage cables in place while they are being clamped by technicians. These braking systems are typically located on the next higher platform. If the braking system fails for any reason, the high-voltage cable may fall uncontrollably, injuring people on the platform below or damaging internal components of the tower. High-voltage cables are heavy, for example, weighing 10 kg per meter. Summary of the Invention

[0004] One object of the present invention is to provide an improved tower or tower section for a wind turbine.

[0005] Therefore, a tower or tower section for a wind turbine includes: a tower wall that encloses the interior space of the tower; a first duct that is disposed within the interior space of the tower and extends vertically along the tower or tower section; and a first high-voltage cable that extends through the first duct.

[0006] By using conduits to guide the high-voltage cables within the tower, the need for cable clamping is eliminated or significantly reduced. This minimizes installation time. Furthermore, installation is safer because, in the event of an accidental cable fall, the impact is confined within the conduit's interior space. Therefore, the risk of injury or damage to personnel or equipment is greatly reduced. Additionally, previously, high-voltage cable clamping was performed during the pre-assembly stage, which, for offshore turbines, occurred at sea. With this design, the conduits are preferably installed at the tower manufacturer on land. This significantly reduces pre-assembly work. Finally, the conduits provide fire protection for the high-voltage cables.

[0007] A tower can consist of one or more tower segments. For example, four or five segments can be used. The tower or tower segments can be made of concrete or steel. In a cross-sectional view, the tower walls can be annular, such as circular. The interior space of the tower is the space located within the ring.

[0008] For example, at least the first conduit is arranged within the internal space of the tower. In an embodiment, a second, third, or more conduits may be arranged within the internal space of the tower, each conduit extending vertically along the erected tower or tower segment, wherein the corresponding first, second, third, and additional high-voltage cables extend within the corresponding conduit.

[0009] The pipe may be made of a metal such as aluminum. For example, the pipe may have a diameter greater than 100 mm, 150 mm, or 200 mm. The pipe may have a wall thickness greater than 2 mm, for example, 3 mm. The pipe may have a length of at least 3 meters, for example, 4 meters. When referred to herein as “pipe,” it may mean first, second, third, or any other pipe, unless otherwise stated.

[0010] Conduits and high-voltage cables are distinct components. They are preferably not rigidly attached to each other. For example, a high-voltage cable consists of one or more conductors, particularly copper conductors. Each conductor may have a cross-sectional area greater than 100, 200, or 300 square millimeters. For instance, three conductors are arranged in each high-voltage cable. One or more conductors are arranged within a cable sheath made of insulating material. Conduits are components separate from the insulating material and from the conductors. Conduits are not attached to the high-voltage cable or any of its components, at least not in a rigid manner.

[0011] According to one embodiment, the tower or tower section further includes: A second pipe arranged parallel to the first pipe within the tower space, and A second high-voltage cable extends through the second conduit.

[0012] The power output of a wind turbine may require more than one high-voltage cable, such as two, three, or more. By arranging the second conduit parallel to the first conduit, the first and second high-voltage cables are ensured to maintain a minimum distance from each other, i.e., separated from each other in cross-sectional view. For example, the centers of the respective high-voltage cables can be arranged to be more than 100 mm or more than 200 mm apart. Therefore, the electromagnetic forces exerted on each other by the first and second high-voltage cables are within acceptable limits. In particular, the first and second high-voltage cables are not in direct contact with each other. Therefore, in the event of a short circuit in one of the first or second high-voltage cables, the short-circuit force is significantly reduced.

[0013] According to one embodiment, an air gap exists between the outer surface of the high-voltage cable and the inner surface of the conduit.

[0014] This advantageously prevents or mitigates the mechanical interaction between the high-voltage cables and the conduit. Furthermore, when more than one conduit is installed, the air gap ensures sufficient distance between the high-voltage cables when viewed in cross-section to reduce the electromagnetic interaction as described above.

[0015] According to yet another embodiment, a spacer is also included along the length of the first and / or second high-voltage cable to maintain an air gap.

[0016] According to yet another embodiment, the spacer centers the first and / or second high-voltage cables on the longitudinal central axis of the first and / or second conduits.

[0017] Therefore, when viewed in cross-section, the space between adjacent high-voltage cables is maintained or maximized.

[0018] According to yet another embodiment, the spacer is made of a flexible material.

[0019] For example, the spacer is made of rubber. In an alternative embodiment, foam material is used.

[0020] According to one embodiment, the spacer includes a plurality of fingers extending inward from the outer periphery, with gaps formed between adjacent fingers.

[0021] The fingers facilitate centering of the first and / or high-voltage cables along the longitudinal central axis of the first and / or second conduits. The gap between the fingers allows hot air to pass upward within the conduits. Hot air may be generated when the high-voltage cables heat up and heat the surrounding air within the corresponding conduits.

[0022] According to yet another embodiment, the first and / or second conduit consists of a plurality of conduit segments connected together by flanges at corresponding flanges.

[0023] For example, the length of the first and / or second pipe is greater than 10 meters, 20 meters, or 30 meters. Each pipe can be divided into multiple pipe segments. The pipe segments are connected together by flanges to form a corresponding pipe. At the corresponding flanges, the corresponding pipe segments can be bolted together.

[0024] According to yet another embodiment, spacers are arranged between corresponding flanges.

[0025] Therefore, the spacer can be easily installed and integrated into each pipe.

[0026] According to one embodiment, the tower or tower section further includes a serrated metal plate that connects the first and / or second conduits to a grounding potential.

[0027] When the tower bends during wind turbine operation, the first and / or second ducts will move up and down. The same effect may also occur due to the thermal expansion and contraction of the first and / or second ducts. Therefore, when connecting the first and / or second ducts to ground potential, a conductive connection is required that allows for the resulting length variations. According to one embodiment, a braided conductor is used for this purpose. However, in this improved embodiment, a serrated metal plate is used instead. The serrated shape adapts to the varying lengths. The inspection intervals on this conductor are longer compared to those on a braided conductor.

[0028] According to yet another embodiment, the tower or tower section includes a ladder, wherein the first and / or second pipes are attached to the ladder in a friction-locking manner, thereby allowing the first and / or second pipes to move longitudinally relative to the ladder.

[0029] As previously mentioned, this length change must be taken into account when the tower bends and / or when the first and / or second pipes thermally expand or contract. The bending of the tower or the thermal expansion of the first and / or second pipes will generate or cause forces that overcome frictional locking. However, the frictional locking mechanism holds the first and / or second pipes in place, thereby compensating for the gravity acting on the first and / or second pipes.

[0030] According to yet another embodiment, in order to attach the first and / or second pipes to the ladder in a friction-locking manner, the first and / or second pipes are clamped between two mutually secured half-shells.

[0031] For example, the half-shells are made of POM (polyoxymethylene) or other plastic materials. Bolts can be used to fasten the shells together. The half-shells can be secured to the ladder using the same or different bolts, or they can be attached to the ladder in other ways.

[0032] According to yet another embodiment, the tower and / or tower section further includes a platform and cable clamps, wherein the first and / or second conduits are arranged below the platform, and the cable clamps suspend the first and / or high-voltage cables from the platform.

[0033] Therefore, the cable clamp bears the weight of the high-voltage cable, at least the weight of the section of the high-voltage cable extending within the corresponding conduit below the cable clamp. By setting up multiple platforms and cable clamps, the total weight of the high-voltage cable is distributed among the multiple cable clamps.

[0034] According to another embodiment, the tower or tower section includes another conduit arranged above and spaced apart from the platform, wherein cable clamps are attached to the portion of the first and / or second high-voltage cable arranged between the first and / or second conduit and the other conduit.

[0035] To support the weight of the high-voltage cable, cable clamps must be attached to it. Therefore, portions of the high-voltage cable must be accessible, i.e., not obstructed by conduits associated with it when viewed in cross-section. For this purpose, for example, a first and / or second conduit terminates below a corresponding platform. Above this platform, a gap exists in the conduit system, in which the cable clamp is arranged and attached to the free portion of the high-voltage cable. Above this gap, for example, another conduit extends collinear with the conduit below the platform. The high-voltage cable passes through this other conduit and extends upwards to the next platform. Preferably, the first and second conduits form a first conduit column, and / or the second conduit and the other conduit or another conduit form a second conduit column.

[0036] According to another aspect, a wind turbine is provided, which includes a tower or tower section as described above.

[0037] According to another aspect, a method for manufacturing a tower or tower segment for a wind turbine is provided. The tower or tower segment has tower walls enclosing an internal space of the tower. The method includes: The first conduit is arranged within the internal space of the tower so as to extend along the axial direction of the tower or tower section, and Erecting towers or tower sections at the wind turbine installation site, and The first high-voltage cable is passed through the first conduit.

[0038] Preferably, the high-voltage cable is installed when the tower or tower section is in a horizontal (not erected) position. This simplifies the installation. Advantageously, the high-voltage cable can be easily installed inside the tower by passing it through a conduit.

[0039] The embodiments and features described with reference to the tower or tower section of the present invention are applicable to the wind turbines and methods of the present invention after necessary modifications.

[0040] Further possible embodiments or alternatives to the invention include combinations of features described above or below with reference to embodiments, which are not explicitly mentioned herein. Those skilled in the art may also add individual or isolated aspects and features to the most basic form of the invention. Attached Figure Description

[0041] Further embodiments, features, and advantages of the invention will become apparent from the following description and dependent claims, taken in conjunction with the accompanying drawings, wherein: Figure 1 A wind turbine according to one embodiment is shown in a side view; Figure 2 Shown in perspective Figure 1 Tower section of a medium-sized wind turbine; Figure 3 Shown in perspective Figure 2 Platform at the top of the middle tower section; Figure 4 The enlarged diagram shows Figure 3 Cable clamps in the middle; Figure 5 To take from Figure 2 The enlarged view shows three parallel conduits, each housing a corresponding high-voltage cable; Figure 6 Shown in exploded view Figure 5 A pipe shown; Figure 7 It shows Figure 6 The spacer or washer shown; Figure 8 Shown from below in perspective Figure 2 The platform in; Figure 9 A perspective view shows the method used to... Figure 8 The three pipes are attached to the flange at the bottom of the platform; Figure 10 A perspective view shows the method used to... Figure 2 One of the pipes is connected to the sawtooth plate at ground potential; Figure 11 This demonstrates the use of two half-shells to connect three pipes. Figure 2 The attachment mechanism of the ladder shown; Figure 12 It shows Figure 11 Exploded view of the attachment mechanism; and Figure 13 A flowchart illustrates a method according to one embodiment.

[0042] In the accompanying drawings, unless otherwise stated, the same reference numerals denote the same or functionally equivalent elements. Detailed Implementation

[0043] Figure 1 A wind turbine 1 according to one embodiment is shown. The wind turbine 1 includes a rotor 2 having two or more blades 3 connected to a hub 4. The hub 4 is connected to a generator (not shown) arranged inside a nacelle 5. During operation of the wind turbine 1, the blades 3 are driven to rotate by wind, and the kinetic energy of the wind is converted into electrical energy by the generator in the nacelle 5. The nacelle 5 is arranged at the upper end of the tower 6 of the wind turbine 1.

[0044] Tower 6 can be connected to a monopile or concrete foundation on the ground or seabed. Tower 6 may include one or more tower segments 7, 8, and 9. When the wind turbine 1 is erected, for example on land or at sea, tower segments 7, 8, and 9 are stacked on top of each other. Tower segments 7, 8, and 9 may be made of concrete or steel. At their respective ends, tower segments 7, 8, and 9 may include flanges for connecting adjacent tower segments 7, 8, and 9 together, for example, using bolts.

[0045] Figure 2 Shown in a slightly upward perspective view Figure 1 Tower segment 8. Tower segment 8 has a top flange 10 and a bottom flange 11. A tower wall 47 (also called a "tower shell") extends between the top flange 10 and the bottom flange 11 and encloses the tower interior space 46. Figure 1 The middle section is indicated by a dashed line. Tower segment 8 has a platform 12 at its top. Another platform (not shown) may be arranged at the bottom.

[0046] Ladder 13 extends along the length L of tower 6. When wind turbine 1 is in its upright position, the length L corresponds to the height direction of tower 6.

[0047] Three conduits 14, 15, and 16 (also referred to herein as "first," "second," and "third" conduits) also extend in the length direction L. They are held to the ladder 13 using a support assembly 17. High-voltage cables 114, 115, and 116 (e.g., ...) extend from each conduit 14, 15, and 16. Figure 3 As shown, and referred to in this article as “first,” “second,” and “third” high-voltage cables, which will be explained in more detail later.

[0048] Figure 3 by Figure 2 View III shows platform 12 as seen from slightly above, with pipes 14, 15, and 16 arranged below platform 12, and additional pipes 14', 15', and 16' arranged above platform 12, and corresponding high-voltage cables 114, 115, and 116 extending within the columns of pipes 14, 14', 15, 15', and 16, 16'. Figure 3A ladder 13 continues upwards on platform 12. A tower lift 36 is located next to ladder 13. The tower lift 36 is used for movement between different platforms.

[0049] Figure 4 by Figure 3 The enlarged view shows the cable clamp 34, which is arranged on the platform 12 and has three clamping units 35. Each clamping unit 35 clamps a high-voltage cable 114, 115, 116.

[0050] Figure 5 It shows Figure 1 A magnified view V. Figure 5 Exploded view of pipe 14 is as follows Figure 6 As shown. Each pipe 14, 15, 16 can be made of aluminum or another metal (preferably lightweight), for example, with a wall thickness of 3 mm. Each pipe 14, 15, 16 can have a total length of, for example, 32 meters.

[0051] Each pipe 14, 15, 16 can be composed of multiple (e.g., four) pipe segments 18, 19 (see also) Figure 2 The pipe 14 is composed of a first segment 18 connected to the second segment 19 by a flange. The first segment 18 has a flange 20 connected to the flange 22 of segment 19 by bolts 21 (see...). Figure 5 ). Figure 6 A spacer 23 is shown arranged between adjacent flanges 20, 22. The spacer 23 is made of a flexible material such as rubber. Once the bolt 21 is tightened, the spacer 23 can act as a washer in the radial direction, thereby preventing air from flowing radially out of the pipe 14 at the locations of the flanges 20, 21. A spacer plate 24 is positioned, for example, between the protruding ends 25 and 26 of the respective flanges 20, 22. When the bolt 21 is tightened, the spacer plate 24 prevents the spacer 23 from being excessively compressed.

[0052] Figure 7 Shown in perspective Figure 6 Section VII-VII shows that the spacer 23 has multiple fingers 27. These fingers extend from the outer frame 28 of the spacer 23 (see section VII-VII). Figure 6 The fingers 27 extend radially inward. They are elastically bent radially outward to allow the high-voltage cable 114 to pass through. Due to the action of the spacers 28 (multiple such spacers are provided along the length of the conduit 14 at each flange connection), the high-voltage cable 114 is held along the longitudinal centerline C of the conduit 14 (see [reference]). Figure 6 Therefore, the high-voltage cable 114 is held in such a way that an air gap 30 is formed between its outer periphery 31 and the inner surface 32 of the conduit 14 (see...). Figure 6The air gap 50 between the fingers 27 of the spacer 23 allows hot air to rise in the pipe 14.

[0053] The high-voltage cable 114 extends upwards to the nacelle 5, preferably to a transformer (not shown) housed therein. At the bottom of the tower 6, the high-voltage cable 114 can be connected to a submarine cable (also not shown). The high-voltage cable 114 can be configured to transmit power at voltages, for example, greater than 30 kV (particularly 66 kV). The high-voltage cable 114 may include multiple, for example, three, core wires (not shown) made of copper or other conductive materials. The core wires are arranged within an insulating sheath, the outer surface 31 of which is, for example, on... Figure 6 and Figure 7 As shown in the diagram. The fingers 27 of the spacer 23 abut against the outer surface 31. Pipes 15, 16 (see...) Figure 5 The second conduit 15 includes the same arrangement as described for conduit 14, so that the second conduit 15 accommodates the second high-voltage cable 115 and the third conduit 16 accommodates the third high-voltage cable 116.

[0054] Figure 8 It shows Figure 2 View VIII shows that pipes 14, 15, and 16 use flange plates 33 at their ends. Figure 9 (Seen in perspective view) Attached to the bottom of tower platform 12. Flange plate 33 is a single plate, and the ends of pipes 14, 15, and 16 abut against the plate via flanges, with corresponding spacers 23 provided between them in each case.

[0055] Now back Figure 3 and Figure 4 As shown in the figure, cable clamp 34 is arranged on platform 12, above pipes 14, 15, and 16 that come up from below. Figure 8 The corresponding high-voltage cables 114, 115, and 116 pass through platform 12 and are clamped in clamping units 35 of cable clamp 34, respectively. Corresponding additional conduits 14', 15', and 16' are arranged above cable clamp 34. Once the high-voltage cables 114, 115, and 116 pass through cable clamp 34 and through the corresponding free space (not covered by the corresponding conduit), they re-enter into the additional conduits 14', 15', and 16'. Preferably, the additional conduits 14', 15', and 16' are all arranged collinearly with the corresponding conduits 14, 15, and 16. Thus, the first conduit 14 and at least one additional conduit 14' form a conduit column, the second conduit 15 and at least one additional conduit 15' form a conduit column, and the third conduit 16 and at least one additional conduit 16' form a conduit column. Preferably, at least two or three additional conduits 14', 15', and 16' are provided in the corresponding conduit columns.

[0056] Figure 10 Pipe 14 and its Figure 5 The flanges 20 and 22 are shown. For example, a serrated plate 42 made of aluminum, copper, or other conductor is attached at one end to the protruding ends 25 and 26 by bolts 43, and at the other end to the ladder bracket 45 attached to the ladder 13 by bolts 44. The ladder bracket 45 serves as a grounding potential here.

[0057] Figure 11 The diagram shows the attachment of pipes 14, 15, and 16 to... Figure 2 The attachment mechanism 37 of the support assembly 17. Figure 12 An exploded view of the attachment mechanism 37 is shown. The attachment mechanism 37 comprises two half-shells 38, 39, preferably made of POM, which clamp pipes 14, 15, 16 therebetween by means of studs 40 in a friction-locking manner. The applied frictional force compensates for the gravity acting on pipes 14, 15, 16. However, when the tower 6 bends or when pipes 14, 15, 16 extend or contract due to thermal effects, pipes 14, 15, 16 can move in the longitudinal direction L. In this case, the frictional locking force is overcome. Furthermore, pipes 14, 15, 16 are traversed by the half-shells 38, 39 through the horizontal plane H of the tower 6 (see also...). Figure 2 The shape lock on the half-shells 38 and 39 keeps them in place. Since the half-shells 38 and 39 are made of POM, they are well-suited for absorbing vibrations occurring in the pipes 14, 15, and 16. For example, using cable bracket 41, the half-shells 38 and 39, and therefore the pipes 14, 15, and 16, are attached to the ladder 13.

[0058] Figure 13 A method according to one embodiment is illustrated in flowchart form.

[0059] In step S1, pipes 14, 15, and 16 are placed in the tower interior space 46 of tower section 8 (see...). Figure 2 Inside, so as to extend along the axial direction L of tower section 8. Here, pipes 14, 15, and 16 are attached to ladder 13, as... Figure 2 As shown. Repeat this process for multiple tower sections 7 and 9.

[0060] Then, the pre-assembled tower sections 7, 8, and 9 are transported to the installation site, such as at sea. Figure 13 In step S2, tower segments 7, 8, and 9 are stacked on top of each other and connected at their respective flanges (as in a joint). Figure 1 and Figure 2 As described), tower sections 7, 8, and 9 are erected, thus forming tower 6.

[0061] In step S3, the corresponding high-voltage cable 114 is passed through a conduit bank 14', 14. For this purpose, for example, a winch (not shown) is used at the nacelle 5. The winch has a steel cable that is lowered through a conduit bank 14', 14 and connected to one end of the high-voltage cable 114. The high-voltage cable 114 is then pulled upward through the conduit banks 14', 14 and through spacers 23, at each spacer 23 causing the fingers 27 to deform radially. Once the high-voltage cable 114 has been pulled upward to the top of the tower 6 using the winch, the clamping units 35 of each clamping unit 34 are tightened to hold the high-voltage cable 114 in place in the vertical direction. This process is repeated for the high-voltage cables 115, 116 and the corresponding conduit banks 15, 15' and 16, 16'.

[0062] Therefore, the weight of each high-voltage cable 114, 115, 116 is distributed vertically among the multiple clamping units 35. A portion of each high-voltage cable 114, 115, 116 is suspended from the upper cable clamp 34. Apart from the clamping units 35, there is no vertical support for the high-voltage cables 114, 115, 116 between the two consecutive platforms 12.

[0063] Although the invention has been described with reference to preferred embodiments, it will be apparent to those skilled in the art that modifications can be made in all embodiments.

Claims

1. A tower (6) or tower segment (7, 8, 9) of a wind turbine (1), comprising: The tower wall (47) encloses the internal space of the tower (46). A first conduit (14), which is arranged within the internal space (46) of the tower and extends along the vertical direction (L) of the tower (6) or tower segment (7, 8, 9), and A first high-voltage cable (114) extends through the first conduit (14).

2. The tower or tower section according to claim 1, further comprising: The second pipe (15), which is arranged parallel to the first pipe (14) within the internal space (46) of the tower, and The second high-voltage cable (115) extends through the second conduit (15).

3. Tower or tower segment according to claim 1 or 2, wherein An air gap (30) exists between the outer surface (31) of the first and / or second high-voltage cable (114) and the inner surface (32) of the first and / or second conduit (14, 15).

4. The tower or tower section according to claim 3, further comprising spacers (23) arranged along the length of the first and / or second high-voltage cables (14, 15) to maintain the air gap (30).

5. The tower or tower section according to claim 4, wherein, The spacer (23) centers the first and / or second high-voltage cables (114, 115) on the longitudinal central axis (C) of the first and / or second conduits (14, 15).

6. The tower or tower section according to claim 4 or 5, wherein, The spacer (23) is made of a flexible material and / or includes a plurality of fingers (27) extending inward from the outer periphery (28), with gaps (50) formed between adjacent fingers (27).

7. The tower or tower section according to any one of claims 1 to 6, wherein, The first and / or second conduit (14, 15) consists of a plurality of conduit segments (18, 19) connected together by flanges at corresponding flanges (20, 22).

8. The tower or tower section according to claim 7, wherein, The spacer (23) is arranged between the corresponding flanges (20, 22).

9. The tower or tower section according to any one of claims 1 to 8 further comprises a serrated metal plate (42) that connects the first and / or second conduits (14, 15) to the grounding potential.

10. The tower or tower section according to any one of claims 1 to 9, further comprising a ladder (13), wherein, The first and / or second pipes (14, 15) are attached to the ladder (13) in a friction-locked manner, thereby allowing the first and / or second pipes (14, 15) to move longitudinally relative to the ladder (13).

11. The tower or tower section according to claim 10, wherein, In order to attach the first and second pipes (14, 15) to the ladder (13) in a friction-locking manner, the first and / or second pipes (14, 15) are clamped between two half-shells (38, 39) that are fastened to each other.

12. The tower or tower section according to any one of claims 1 to 11, further comprising a platform (12) and a cable clamp (34), wherein, The first and / or second conduits (14, 15) are arranged below the platform (12), and the cable clamp (34) suspends the first and / or second high-voltage cables (114, 115) from the platform (12).

13. The tower according to claim 12, comprising additional conduits (14', 15') arranged above and spaced apart from the platform (12), wherein, The cable clamp (34) is attached to the portion of the first and / or second high-voltage cable (114, 115) arranged between the first and / or second conduit (14, 15) and the other conduit (14', 15').

14. A wind turbine (1) comprising a tower (6) or a tower section (7, 8, 9) according to any one of claims 1 to 13.

15. A method of manufacturing a tower (6) or tower segment (7, 8, 9) for a wind turbine (1), said tower (6) or tower segment (7, 8, 9) having a tower wall (47) enclosing an internal space (46) of the tower, said method comprising: The first conduit (14) is arranged (S1) within the internal space (46) of the tower so as to extend along the axial direction (L) of the tower (6) or tower segment (7, 8, 9), and Erect (S2) the tower (6) or tower section (7, 8, 9) at the installation site of the wind turbine (1), and Pass the first high-voltage cable (114) through the first conduit (14) (S3).

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