CN115706398A - Wind generating set and yaw cable twisting structure thereof - Google Patents

Wind generating set and yaw cable twisting structure thereof Download PDF

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Publication number
CN115706398A
CN115706398A CN202110929782.7A CN202110929782A CN115706398A CN 115706398 A CN115706398 A CN 115706398A CN 202110929782 A CN202110929782 A CN 202110929782A CN 115706398 A CN115706398 A CN 115706398A
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China
Prior art keywords
cable
yaw
twisted
generating set
tower
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CN202110929782.7A
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Chinese (zh)
Inventor
张成平
白文华
李文学
郭旺
杨张斌
项建强
张斯翔
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Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
China Three Gorges Construction Engineering Co Ltd
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Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
China Three Gorges Construction Engineering Co Ltd
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Priority to CN202110929782.7A priority Critical patent/CN115706398A/en
Publication of CN115706398A publication Critical patent/CN115706398A/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

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Abstract

The invention provides a wind generating set and a yaw cable twisting structure thereof, comprising: the cable clamp plate is arranged in the engine room and is positioned on an extension line of the rotating axis of the tower drum; the anti-collision platform is horizontally arranged at the top end inside the tower barrel and is provided with a through hole; the saddle bracket is arranged on the side wall of the tower barrel below the anti-collision platform; the starting end of the twisted cable is connected with the cable clamp plate, the twisted cable penetrates through the through hole of the anti-collision platform to form a U-shaped suspension bend below the saddle bracket, and the finishing end of the twisted cable is connected to the saddle bracket; in the process that the starting end of the twisted cable twists around the rotation axis of the tower barrel along with the yaw of the engine room, the lowest point of the U-shaped overhang bend is lifted upwards, the twisted cable is not in contact with the edge of the through hole of the anti-collision platform, the twisted cable can be prevented from colliding with the edge of the anti-collision platform, and the safety of the twisted cable is enhanced.

Description

Wind generating set and yaw cable twisting structure thereof
Technical Field
The invention relates to the technical field of wind power generation, in particular to a wind generating set and a yaw cable twisting structure thereof.
Background
The wind generating set is a rotating machine which captures wind energy through blades to form kinetic energy, converts the kinetic energy into electric energy through a generator and transmits the electric energy out through a power transmission system, and a power cable is an important component of the power transmission system. In order to facilitate capturing wind energy, both direct drive and doubly fed wind power plants have a yaw system. In the yaw process of the fan, a section of cable of a power transmission system needs to participate in yaw rotation of the unit, the section of cable is generally a distortion-resistant flexible cable for a wind driven generator, and the cable is a twisted section of cable. Compared with the cable of the complete machine power transmission system, the cable twisting section has complex and changeable working conditions, the cable laying and twisting structural design is the most complex, the twisting principle is unclear, the cable laying structural design is not good, the problem that the cable at the position collides with peripheral mechanisms is easily caused, and the safe operation of the unit is further influenced.
A cable at a twisting section of a power transmission system of the wind generating set starts from a cable clamp plate at the rotating center of a machine head, downwards passes through a through hole of the anti-collision platform, reaches a saddle bracket on the wall of a tower barrel after being bent through U-shaped overhang, and then extends downwards along the wall of the tower for transmission. When the wind generating set operates, the set is influenced by complex working conditions, and the cable at the twisting section can be twisted, shaken, collided and the like.
In order to avoid the above risks, a yaw cable twisting system needs to be better designed, and the yaw cable twisting system comprises a cable clamp plate of a cable in a fan cabin, an anti-collision platform with a cable through hole, a tower wall saddle bracket and other structures so as to prevent the cable twisting section from colliding with the anti-collision platform.
Disclosure of Invention
Therefore, the invention aims to provide a wind generating set and a yaw cable twisting structure thereof, so as to solve the problem that a yaw cable twisting section cable collides with an anti-collision platform in the prior art.
According to an aspect of the invention, there is provided a wind turbine generator system yaw twisting structure, including:
the cable clamp plate is arranged in the engine room and is positioned on an extension line of the rotating axis of the tower drum;
the anti-collision platform is horizontally arranged at the top end in the tower barrel and is provided with a through hole;
the saddle bracket is arranged on the side wall of the tower barrel below the anti-collision platform;
the starting end of the twisted cable is connected with the cable clamp plate, the twisted cable penetrates through the through hole of the anti-collision platform to form a U-shaped suspension bend below the saddle bracket, and the finishing end of the twisted cable is connected to the saddle bracket;
and in the process that the starting end of the twisted cable twists around the rotation axis of the tower along with the yaw of the cabin, the lowest point of the U-shaped overhang bend is lifted upwards, and the twisted cable is not in contact with the edge of the through hole of the anti-collision platform.
Optionally, the starting end of the twisted cable is twisted about the tower axis of rotation in a range of 0 to 720 degrees with the nacelle yaw.
Optionally, during twisting of the starting end of the twisted cable around the tower rotation axis with the yaw of the nacelle, the overhanging length of the twisted cable is shortened and the starting end isThe included angle theta between the end tangent line and the horizontal line B In the range of 80 to 85 DEG, and the included angle theta between the tangent of the terminating end and the horizontal line A Ranges from 75 degrees to 85 degrees.
Optionally, during the twisting of the starting end of the twisted cable around the tower rotation axis along with the yaw of the nacelle, the position of the twisted cable passing through the anti-collision platform is deviated from the tower rotation axis by a distance greater than 5 cm.
Optionally, a flexible suspension cable structure is formed between the starting end and the ending end of the twisted cable.
Optionally, a vertical distance between the saddle bracket and the cable cleat ranges from 900 cm to 1100 cm.
Optionally, the horizontal distance between the saddle bracket and the cable cleat ranges from 90 cm to 130 cm.
According to another aspect of the invention, a wind generating set is provided, which includes a generator disposed inside a nacelle, a tower, and the above-mentioned yaw cable twisting structure; wherein the power cable output by the generator is connected to the cable clamp plate.
According to the wind generating set and the yawing cable twisting structure thereof, compared with the existing structure, the anti-collision platform can be prevented from being collided by cables at the twisting section on the premise that the length of the twisted cable is shortened due to yawing of the cabin.
Drawings
The above and other objects and features of the present invention will become more apparent from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic view of a yaw twisting structure of a wind generating set according to an embodiment of the invention.
Fig. 2 is a schematic view of a power conductor configuration according to an embodiment of the invention.
Fig. 3 is a schematic view of a profile curve of a twisted cable according to an embodiment of the invention.
Detailed Description
Embodiments in accordance with the present invention will now be described in detail with reference to the drawings, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
The schematic structural diagram of the yaw twisting cable of the wind generating set is shown in figure 1. The yaw cable-twisting fixing mode of the wind generating set is as follows: a is a fixed position of a cable on a saddle bracket 100 on the wall of the tower barrel, B is a fixed position of the cable on a cable clamp plate 300 in a fan engine room 200, O is a lowest suspension point of a twisted cable, BB1 is a rotation axis of the tower barrel of the fan engine room 200, C is a central hole position of a No. 1 anti-collision platform in the tower barrel 400, D is a central hole position of a No. 2 anti-collision platform, E is a central hole position of a No. 3 anti-collision platform, C1, D1 and E1 are natural suspension offset points of the twisted cable at the platform hole positions of C, D and E, H is a sag height, H is a height difference of the twisted suspension point, and L is a span of the twisted suspension point. The structural design here includes: the cable clamp plate 300 at the position B, the No. 1 anti-collision platform at the position C, the anti-collision platform in the tower 400 at the position D/E, the saddle bracket 100 at the position A and the like are arranged in a certain position and structurally designed.
A cable at a twisted section of a power transmission system of the wind generating set starts from a position B of a rotary central cable clamp plate 300 of a machine head, downwards passes through a U-shaped overhang bend, reaches a position A of a saddle bracket 100 on the tower wall, and then extends downwards along the tower wall for transmission. When the wind generating set operates, the set is influenced by complex working conditions, and the cable at the twisting section can be twisted and collided with the anti-collision platform. In order to avoid the above risks, a better laying structure of the cable section needs to be designed, and research on cable form of the cable section needs to be carried out. According to the figure 1, one end of a twisted cable is fixed through a cable clamp plate 300, the other end of the twisted cable is fixed on a saddle bracket 100, the cable between the two fixed points is in a catenary type of a cable structure, the twisted cable is a typical flexible catenary structure, bending resistance and pressure resistance are avoided, the initial form of the cable is the balance position form under the action of the dead weight or external load of the cable, and the catenary form is similar to that of an overhead transmission conductor.
It should be noted that the nacelle 200 is typically yawed at an angle in the range of 0 to 720 degrees. Under the premise that the nacelle 200 yaws to shorten the length of the twisted cable, the catenary configuration changes, for example, the lowest point of the U-shaped overhang bend is lifted upwards, the overhang length of the twisted cable is shortened, the position of the twisted cable passing through the anti-collision platform deviates from the rotation axis of the tower and is closer to the edge of the through hole of the anti-collision platform, and the risk of collision is increased.
As shown in fig. 1, an embodiment of the present invention provides a yaw twisting structure of a wind turbine generator system, including:
the cable clamp plate 300 is arranged in the engine room 200 and is positioned on an extension line of a tower rotation axis;
the anti-collision platform is horizontally arranged at the top end inside the tower tube 400 and is provided with a through hole;
a saddle bracket 100 arranged on the side wall of the tower below the anti-collision platform;
the starting end of the twisted cable is connected with the cable clamp plate 300, the twisted cable penetrates through the through hole of the anti-collision platform and forms a U-shaped suspension bend below the saddle bracket 100, and the ending end of the twisted cable is connected to the saddle bracket 100;
in the process that the starting end of the twisted cable twists around the rotation axis of the tower along with the yaw of the nacelle 200, the lowest point of the U-shaped overhang bend is lifted upwards, and the twisted cable is not in contact with the edge of the through hole of the anti-collision platform.
Wherein the starting end of the twisted cable twists through a range of 0 to 720 degrees about the tower axis of rotation as the nacelle 200 yaws. A flexible suspension cable structure is formed between the starting end and the ending end of the twisted cable, and the suspension length of the twisted cable is shortened in the process that the starting end of the twisted cable twists around the rotation axis of the tower along with the yaw of the engine room 200.
Taking the catenary equation of the overhead line with unequal high suspension points as an example, fig. 2 shows a schematic diagram of a transmission conductor form. A. B is two suspension points, the span is l, the height difference is h, gamma is uniformly distributed along the line and vertically downward, the direction is vertically downward, O is the lowest point of the sag, the lower point A is selected as the origin of coordinates, and the shape formed under the dead weight load is an unequal-height catenary.
In FIG. 2, l is the lead span, h is the difference between the heights of two transmission line hanging points, fm is the midspan sag, and σ is A Stress at point A, σ B Stress at point B, a is the distance from the lowest point to the left end, and B is the distance from the lowest point to the right endDistance, θ A Is the angle between the tangent line at point A and the horizontal line, theta B Is the included angle between the tangent line at point B and the horizontal line, beta is the included angle between the tangent line at point AB and the horizontal line, sigma 0 The stress at the lowest point, xm is the mid-span distance, and gamma is the specific load of the transmission line.
In order to prevent the cable twisting segment from colliding with the anti-collision platform in the yaw process of the nacelle 200, an included angle theta between a tangent line of the starting end and a horizontal line is formed in the process that the starting end of the cable twisting cable twists around the rotation axis of the tower barrel B The variation range of (a) is 80 to 85 degrees, and the included angle theta between the tangent of the terminating end and the horizontal line A Ranges from 75 degrees to 85 degrees. Above the included angle theta B Due to the design of the angle range, the twisted cable section near the starting end can be prevented from contacting with the edge of the anti-collision platform. Above the included angle theta A The design of the angle range can also prevent the overlarge horizontal tension between the end and the saddle bracket 100, and ensure the safety and stability of the saddle bracket 100.
According to the fact that the span of the overhead transmission line is much larger than the cross section size of the wire, namely the length of the transmission wire is far larger than the diameter of the transmission wire, meanwhile, the transmission wire is formed by stranding a plurality of strands of thin metal wires, the influence of the rigidity of the overhead wire on the curve shape of the suspension droop space is very small, and the following two assumptions can be made:
1) The overhead line is assumed to be a flexible cable chain without rigidity, and is only pulled and not bent;
2) It is assumed that the loads acting on the overhead line are evenly distributed along its line length.
According to the two assumptions, the catenary equation of the overhead transmission line with unequal-height suspension points when the origin of coordinates is positioned at the left suspension point:
Figure BDA0003210112150000051
wherein: specific dead weight
Figure BDA0003210112150000052
Unit N/m.mm 2 Or MPa/m, q is the unit length mass of the overhead line, kg/km, A is the cross section of the wire, and the unit mm 2 。
Fig. 3 is a schematic view of a profile curve of a twisted cable according to an embodiment of the invention. During the twisting of the starting end of the twisted cable around the tower rotation axis as the nacelle 200 yaws, the twisted cable is positioned at a position offset from the tower rotation axis (i.e., the distance C1C in fig. 3) by more than 5 cm through the crash platform. The vertical distance H between the saddle bracket 100 and the cable cleat 300 ranges from 900 cm to 1100 cm. The horizontal distance L between the saddle bracket 100 and the cable cleat 300 ranges from 90 cm to 130 cm. In the embodiment shown in fig. 3, the vertical distance H between the position a of the saddle bracket 100 and the position B of the cable clamp 300 is 1000 cm, the horizontal distance L is 120.8 cm, the sag height H is 180 cm, the vertical distance H0 between the position B of the cable clamp 300 and the position C of the center hole of the # 1 crash pad is 358.5 cm, the vertical distance H1 between the position C of the center hole of the # 1 crash pad and the position D of the center hole of the # 2 crash pad is 270 cm, and the vertical distance H2 between the position D of the center hole of the # 2 crash pad and the position E of the center hole of the # 3 crash pad is 270 cm.
According to the conclusion, the boundary of the design of the wind turbine yaw twist-blocking cable laying structure and the anti-collision structure is obtained, and the wind turbine yaw twist-blocking cable laying structure and the anti-collision structure can be designed according to the offset of twist-cable cables when the platform distribution, the holes, the guard rings and the anti-collision structure are designed, so that the problems of collision and abrasion of the conventional twist-cable cables are effectively solved.
The embodiment of the invention also provides a wind generating set, which comprises a generator arranged in the engine room 200, a tower 400 and a yaw cable twisting structure of the wind generating set, wherein the yaw cable twisting structure is arranged on the tower 400; wherein the power cable output by the generator is connected to the cable cleat 300.
Although the embodiments of the present invention have been described in detail above, those skilled in the art may make various modifications and alterations to the embodiments of the present invention without departing from the spirit and scope of the present invention. It will be understood that modifications and variations may occur to those skilled in the art, which modifications and variations may be within the spirit and scope of the embodiments of the invention as defined by the appended claims.

Claims (8)

1. The utility model provides a cable structure is turned round in driftage of wind generating set which characterized in that includes:
the cable clamp plate is arranged in the engine room and is positioned on an extension line of the rotating axis of the tower drum;
the anti-collision platform is horizontally arranged at the top end inside the tower barrel and is provided with a through hole;
the saddle bracket is arranged on the side wall of the tower barrel below the anti-collision platform;
the starting end of the twisted cable is connected with the cable clamping plate, the twisted cable penetrates through the through hole of the anti-collision platform, a U-shaped suspension bend is formed below the saddle bracket, and the ending end of the twisted cable is connected to the saddle bracket;
and in the process that the starting end of the twisted cable twists around the rotation axis of the tower barrel along with the yaw of the cabin, the lowest point of the U-shaped overhang bend is lifted upwards, and the twisted cable is not in contact with the edge of the through hole of the anti-collision platform.
2. The yaw twisting structure of a wind generating set according to claim 1,
the starting end of the twisted cable is twisted about the tower rotation axis in a range of 0 to 720 degrees with the yaw of the nacelle.
3. The yaw twisting structure of a wind generating set according to claim 1,
and in the process that the starting end of the twisted cable twists around the rotating axis of the tower barrel along with the yaw of the engine room, the suspension length of the twisted cable is shortened, and the included angle theta between the tangent of the starting end and the horizontal line is B The variation range of (A) is 80-85 degrees, and the included angle theta between the tangent line of the end and the horizontal line A Ranges from 75 degrees to 85 degrees.
4. The yaw twisting structure of the wind generating set according to claim 1,
and in the process that the starting end of the twisted cable twists around the rotation axis of the tower along with the yaw of the cabin, the position of the twisted cable penetrating through the anti-collision platform deviates from the rotation axis of the tower by a distance of more than 5 cm.
5. The yaw twisting structure of the wind generating set according to claim 1,
and a flexible suspension cable structure is formed between the starting end and the ending end of the twisted cable.
6. The yaw twisting structure of the wind generating set according to claim 1,
the vertical distance between the saddle bracket and the cable clamp plate ranges from 900 cm to 1100 cm.
7. The yaw twisting structure of the wind generating set according to claim 1,
the horizontal distance between the saddle bracket and the cable clamp plate ranges from 90 cm to 130 cm.
8. A wind generating set, characterized by comprising a generator arranged inside a cabin, a tower and a wind generating set yaw cable twisting structure according to any one of claims 1 to 7;
wherein the power cable output by the generator is connected to the cable clamp plate.
CN202110929782.7A 2021-08-13 2021-08-13 Wind generating set and yaw cable twisting structure thereof Pending CN115706398A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110929782.7A CN115706398A (en) 2021-08-13 2021-08-13 Wind generating set and yaw cable twisting structure thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110929782.7A CN115706398A (en) 2021-08-13 2021-08-13 Wind generating set and yaw cable twisting structure thereof

Publications (1)

Publication Number Publication Date
CN115706398A true CN115706398A (en) 2023-02-17

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ID=85181139

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110929782.7A Pending CN115706398A (en) 2021-08-13 2021-08-13 Wind generating set and yaw cable twisting structure thereof

Country Status (1)

Country Link
CN (1) CN115706398A (en)

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