CN216866919U - Wind turbine tower clearance monitoring system and wind turbine - Google Patents

Abstract

The application discloses wind generating set pylon headroom monitoring system and wind generating set belongs to wind power generation technical field. The system comprises: the laser radar is arranged on an engine room shell of the wind generating set and is positioned between a rotating plane of an impeller of the wind generating set and a vertical plane where a center line of a tower barrel is located, the laser radar comprises a plurality of receiving and transmitting assemblies, the receiving and transmitting assemblies are used for transmitting laser beams, receiving reflected signals and generating ranging data, a plane formed by the laser beams is intersected with the rotating plane of the impeller, and the laser beams rotate and scan around a scanning rotating shaft passing through the laser radar; the industrial personal computer is connected with the laser radar, obtains ranging data from the laser radar to obtain the number of the laser beams which are not shielded, and sends out clearance early warning signals under the condition that the number of the laser beams which are not shielded is smaller than the number of the laser beams which are not shielded under the condition of reference clearance value. According to the embodiment of the application, the safety of the wind generating set can be improved.

Description

Wind turbine tower clearance monitoring system and wind turbine

technical field

The application belongs to the technical field of wind power generation, and in particular relates to a wind turbine tower clearance monitoring system and a wind turbine.

Background technique

The tower clearance of the wind turbine refers to the distance from the tip of the blade to the surface of the tower during the rotation of the impeller. For wind turbines, the blades may hit the tower during the rotation process, that is, the blade sweeps the tower. Once the blade sweeps the tower, the blade needs to be replaced. In order to be able to give an early warning of the blade sweeping situation in time, it is necessary to monitor the tower clearance of the wind turbine. Therefore, there is an urgent need for a system capable of monitoring the tower clearance of a wind turbine, so as to improve the safety of the wind turbine.

Utility model content

Embodiments of the present application provide a wind turbine tower clearance monitoring system and a wind turbine, which can improve the safety of the wind turbine.

In the first aspect, an embodiment of the present application provides a wind turbine tower clearance monitoring system, including: a lidar, which is arranged on the nacelle shell of the wind turbine, and is located where the rotation plane of the impeller of the wind turbine and the center line of the tower are located. Between the vertical planes, the vertical plane is parallel to the rotation plane of the impeller, the lidar includes a plurality of transceiver components, each transceiver component is used to send out a laser beam, receive a reflected signal corresponding to a laser beam, and generate ranging Data, ranging data is used to characterize the distance between the lidar and the object blocking the laser beam. The plane formed by the multiple laser beams intersects the rotation plane of the impeller, and the multiple laser beams rotate and scan around the scanning rotation axis passing through the lidar. ;The industrial computer is connected with the lidar to obtain ranging data from the lidar. According to the ranging data and the blade length of the wind turbine blades, the number of laser beams that are not blocked by the blades and the tower is obtained. When the number of laser beams blocked by the tower and the tower is less than the number of laser beams not blocked by the blades and the tower under the condition of the reference clearance value, a clearance warning signal is issued.

In some possible embodiments, the lidar is located at the bottom of the nacelle shell and is connected to the nacelle shell through a first bracket; or, the lidar is located at the top of the nacelle shell and is connected to the nacelle shell through a second bracket.

In some possible embodiments, the first bracket includes an L-shaped bracket, the second bracket includes an L-shaped bracket, one end of the L-shaped bracket is fixedly connected to the cabin shell, and the other end of the L-shaped bracket is fixedly connected to the lidar.

In some possible embodiments, when the lidar is connected to the nacelle shell through the first bracket, the inclination angle of one end of the first bracket connected to the lidar is the same as the elevation angle of the impeller; when the lidar is connected to the nacelle shell through the second bracket In the case of connection, the inclination angle of the end of the second bracket connected to the lidar is the same as the elevation angle of the impeller.

In some possible embodiments, the scanning rotation axis is parallel to the axis of the impeller; the plane formed by the plurality of laser beams is perpendicular to the rotation plane of the impeller.

In some possible embodiments, the number of transceiving components includes 16, 32, or 64.

In some possible embodiments, the industrial computer acquires ranging data of the plurality of laser beams around the scanning rotation axis within a predetermined rotation angle range from the lidar, and the symmetry axis of the predetermined rotation angle range is parallel to the center line of the tower.

In some possible embodiments, the predetermined rotation angle range includes 120°, 150° or 180°.

In some possible embodiments, the system further includes: a programmable logic controller, connected to the industrial computer, for receiving a clearance warning signal sent by the industrial computer, and controlling the wind turbine pitch according to the clearance warning signal.

In a second aspect, an embodiment of the present application provides a wind turbine, including the wind turbine tower clearance monitoring system of the first aspect.

Embodiments of the present application provide a tower clearance monitoring system for a wind turbine and a wind turbine, and the lidar can be arranged on the nacelle casing of the wind turbine. The lidar is located between the rotational plane of the wind turbine's impeller and the vertical plane where the centerline of the tower lies. The multiple transceiver components of the lidar can emit multiple laser beams, the plane formed by the multiple laser beams intersects the rotation plane of the impeller, and the multiple laser beams rotate and scan around the scanning rotation axis, so that the Partially obscured by blades and/or tower. The industrial computer can determine the laser beam that is not blocked by the blade and the tower based on the ranging data corresponding to the laser beam sent by the lidar and the blade length of the blade. The number of laser beams that are not blocked by blades and towers is less than the number of laser beams that are not blocked by blades and towers under the condition of the reference clearance value, indicating that the current value of the tower clearance of the wind turbine is less than the reference clearance value, that is, wind power generation If the current tower clearance of the unit is abnormal, an early warning can be issued through the clearance warning signal to avoid the blade sweeping the tower, realize the monitoring of the wind turbine tower clearance, and improve the safety of the wind turbine.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that need to be used in the embodiments of the present application. For those of ordinary skill in the art, without creative work, the Additional drawings can be obtained from these drawings.

FIG. 1 is a schematic side view of an example of a wind turbine generator set according to an embodiment of the present application;

2 is a schematic structural diagram of an embodiment of a wind turbine tower tower clearance monitoring system provided by the present application;

3 is a schematic structural diagram of another embodiment of the wind turbine tower tower clearance monitoring system provided by the application;

FIG. 4 is a schematic diagram of an example in which a laser radar according to an embodiment of the present application transmits a plurality of laser beams;

5 is a schematic diagram of an example of an example of a laser beam emitted by a lidar disposed in a wind turbine according to an embodiment of the present application;

6 is a schematic diagram of an example of an example of a laser beam emitted by a lidar disposed in a wind turbine according to an embodiment of the present application;

FIG. 7 is a schematic diagram of an example of the connection between the lidar and the nacelle shell provided by the embodiment of the present application;

FIG. 8 is a schematic diagram of another example of the connection between the lidar and the cabin casing provided by the embodiment of the present application;

9 is a schematic diagram of an example of a predetermined rotation angle range provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of another embodiment of the wind turbine tower tower clearance monitoring system provided by the present application.

Detailed ways

The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, but not to limit the present application. It will be apparent to those skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating examples of the present application.

With the rapid development of new energy technology, the application scope of new energy is getting wider and wider. Among them, wind power technology has become one of the key new energy technologies. Wind power generation technology is a technology for converting wind energy into electrical energy, and specifically, wind energy can be converted into electrical energy by using wind turbines.

FIG. 1 is a schematic side view of an example of a wind turbine according to an embodiment of the present application. As shown in FIG. 1 , the wind turbine includes blades 11 , a nacelle 12 and a tower 13 . The tower clearance of the wind turbine refers to the distance from the tip of the blade 11 to the surface of the tower 13 during the rotation of the impeller. D1 in Figure 1 is the tower clearance of the wind turbine. During the rotation of the blade 11, the tower may reach the tower tube 13 due to the too small clearance distance of the tower, that is, the blade sweeps the tower. Once the blade sweeps the tower, the blade 11 needs to be replaced. In order to be able to give an early warning of the blade sweeping situation in time, it is necessary to monitor the tower clearance of the wind turbine.

The application provides a wind turbine tower clearance monitoring system and a wind turbine. A laser radar can be set on the wind turbine, and the ranging data obtained by the laser scanning function of the laser radar and the blade length of the blades of the wind turbine are used. To determine whether the current tower clearance is too small and whether an early warning is required, so as to monitor the tower clearance and improve the safety of the wind turbine.

The following describes the wind turbine tower clearance monitoring system and the wind turbine in turn.

The present application provides a tower clearance monitoring system for a wind turbine. FIG. 2 is a schematic structural diagram of an embodiment of a wind turbine tower tower clearance monitoring system provided by the present application. FIG. 3 is a schematic structural diagram of another embodiment of the wind turbine tower tower clearance monitoring system provided by the present application. As shown in FIG. 2 and FIG. 3 , the wind turbine tower clearance monitoring system may include a lidar 21 and an industrial computer 22 .

The lidar 21 can be disposed in the casing of the nacelle 12 of the wind turbine, between the rotation plane of the impeller of the wind turbine and the vertical plane where the centerline of the tower 13 is located. That is, the lidar 21 is located between the rotation plane of the plurality of blades 11 of the wind turbine and the vertical plane where the centerline 14 of the tower 13 is located. The vertical plane is parallel to the rotation plane of the impeller, ie the vertical plane is parallel to the rotation plane of the plurality of blades 11 . In some examples, as shown in FIG. 2 , the lidar 21 may be positioned at the bottom of the housing of the nacelle 12 . In other examples, as shown in FIG. 3 , the lidar 21 may be disposed on the top of the housing of the nacelle 12 .

The lidar 21 may include multiple transceiver components. Each transceiver component is used to send out a laser beam, receive the reflected signal corresponding to the laser beam, and generate ranging data. Multiple transceiver components can emit multiple laser beams, that is, the lidar 21 can emit multiple laser beams. Specifically, the transceiver assembly may include a transmitter and a receiver, where the transmitter is used for emitting the laser beam, and the receiver is used for receiving the reflected signal. Ranging data is generated from reflected signals. Ranging data is used to characterize the distance between the lidar and the object blocking the laser beam. For example, FIG. 4 is a schematic diagram of an example in which the laser radar according to the embodiment of the present application transmits multiple laser beams. As shown in FIG. 4 , the lidar 21 can emit multiple laser beams 23 , and the multiple laser beams 23 are distributed in a fan shape.

The plane formed by the plurality of laser beams 23 emitted by the lidar 21 intersects the rotation plane of the impeller, and the plurality of laser beams rotate and scan around the scanning rotation axis passing through the lidar 21 . As shown in FIG. 4 , the plurality of laser beams 23 emitted by the lidar 21 can be rotated and scanned around the scanning rotation axis 24 in the direction of the arrow in FIG. Specifically, in one scanning period of the lidar 21 , the plurality of laser beams 23 can rotate 360° around the scanning rotation axis 24 , that is, the lidar 21 can rotate and scan 360° in one scanning period. By rotating and scanning, the lidar 21 can perceive the information of the surrounding three-dimensional space (X, Y, Z). In some examples, the scanning rotation axis 24 may be parallel to the axis of the impeller, and the plane formed by the plurality of laser beams 23 may be perpendicular to the rotation plane of the impeller, so that the distance represented by the acquired distance measurement data is more reliable, and the wind power is further improved. Accuracy of genset tower clearance monitoring.

FIG. 5 is a schematic diagram of an example of a laser beam emitted by a laser radar disposed in a wind turbine according to an embodiment of the present application. FIG. 6 is a schematic diagram of an example of a laser beam emitted by a lidar disposed in a wind turbine according to an embodiment of the present application. As shown in FIG. 5 and FIG. 6 , the plane formed by the plurality of laser beams 23 emitted by the lidar 21 intersects the rotation plane of the impeller, that is, the plane formed by the plurality of laser beams 23 emitted by the lidar 21 intersects the rotation plane of the blade 11 . Part of the laser beams 23 of the plurality of laser beams 23 is shielded by the blades 11 and the tower 13 , and the other part is not shielded by the blades 11 and the tower 13 . The plurality of laser beams 23 can be rotated and scanned in the direction of the dotted arrow in FIG. 6 .

The industrial computer 22 is connected to the laser radar 21, and the connection between the industrial computer 22 and the laser radar 21 may be a wired connection or a wireless connection, which is not limited herein. The industrial computer 22 can be used to obtain ranging data from the lidar 21. According to the ranging data and the blade length of the blades 11 of the wind turbine, the number of laser beams 23 not blocked by the blades 11 and the tower 13 is obtained. When the number of laser beams 23 blocked by 11 and the tower 13 is less than the number of laser beams 23 not blocked by the blades 11 and the tower 13 under the condition of the reference clearance value, a clearance warning signal is issued.

If the distance represented by the ranging data corresponding to a laser beam 23 is smaller than the length of the blade, it can be considered that the laser beam 23 is blocked by the blade 11 and/or the tower 13 . The reference headroom value is the headroom value of the wind turbine under normal conditions. The number of laser beams 23 not blocked by the blades 11 and the tower 13 is less than the number of laser beams 23 not blocked by the blades 11 and the tower 13 under the condition of the reference clearance value, indicating that the current clearance value of the wind turbine is smaller than the reference clearance value , that is, the current tower clearance of the wind turbine is abnormal, and it is very likely that the blade sweeps the tower. In this case, the clearance warning signal can be used to carry out clearance warning to alert the operator or relevant staff that the tower clearance of the wind turbine is abnormal, so that the operator or relevant staff can take corresponding measures in time to ensure the safety of the wind turbine. safety.

The number of laser beams 23 not blocked by the blades 11 and the tower 13 is greater than or equal to the number of laser beams 23 not blocked by the blades 11 and the tower 13 under the condition of the reference clearance value, indicating that the current clearance value of the wind turbine is greater than or It is equal to the reference clearance value, that is, the current tower clearance of the wind turbine is normal, and there is no need to issue a clearance warning signal.

In some examples, the number of transceiver components may include, but is not limited to, 16, 32, or 64, that is, the number of laser beams emitted by the lidar 21 may include, but is not limited to, 16, 32, or 64. The greater the number of transceiver components in the lidar 21, the greater the number of laser beams emitted by the lidar 21, the higher the accuracy of wind turbine tower clearance monitoring, and the more accurate the clearance warning.

For example, the lidar 21 includes 16 transceiver components capable of emitting 16 laser beams. The scanning frequency of the lidar 21 is 10 Hz, and the scanning period is 100 milliseconds. The ranging data corresponding to the 16 laser beams 23 within 100 milliseconds can be acquired, and the distance represented by the ranging data corresponding to the 16 laser beams 23 within 100 milliseconds can be obtained. If the distance represented by the ranging data corresponding to 14 of the 16 laser beams 23 is smaller than the blade length, and the number of laser beams 23 not blocked by the blade 11 and the tower 13 under the condition of the reference clearance value is 4, that is, there is no The number of laser beams 23 blocked by the blade 11 and the tower 13 is 2, which is less than the number 4 of the laser beams 23 not blocked by the blade 11 and the tower 13 under the condition of the reference clearance value. The industrial computer 22 can issue a clearance warning signal.

In the embodiment of the present application, the laser radar 21 can be selected according to the specific application scenario, so that the parameters such as the number of laser beams, scanning frequency, scanning period, ranging capability, accuracy, and angular resolution of the laser radar 21 can meet the requirements of the wind turbine tower. The need for clearance monitoring.

In the embodiment of the present application, the lidar 21 may be arranged on the nacelle casing of the wind turbine. The lidar 21 is located between the rotational plane of the impeller of the wind turbine and the vertical plane where the centerline of the tower lies. The multiple transceiver components of the lidar 21 can emit multiple laser beams 23 . The plane formed by the multiple laser beams intersects the rotation plane of the impeller. Portions of the laser beams 23 are blocked by the blades 11 and/or the tower 13 . The industrial computer 22 can determine the laser beams that are not blocked by the blades and the tower based on the ranging data corresponding to the laser beams 23 emitted by the lidar 21 and the blade length of the blades 11 . The number of laser beams 23 not blocked by the blades 11 and the tower 13 is less than the number of laser beams 23 not blocked by the blades 11 and the tower 13 under the condition of the reference clearance value, indicating that the current value of the tower clearance of the wind turbine is less than the reference The headroom value, that is, the current tower clearance of the wind turbine is abnormal, and an early warning can be issued through the clearance warning signal to avoid the blade sweeping the tower, realize the tower clearance monitoring of the wind turbine, and improve the safety of the wind turbine.

In some embodiments, in order to ensure the stability of the arrangement of the lidar 21 , the lidar 21 may be connected to the housing of the nacelle 12 through a bracket.

FIG. 7 is a schematic diagram of an example of the connection between the lidar and the cabin casing according to the embodiment of the present application. As shown in FIG. 7 , the lidar 21 is located at the bottom of the casing of the nacelle 12 and is connected to the casing of the nacelle 12 through a first bracket 25 . The first bracket 25 and the casing of the nacelle 12 may be connected by bolts or other means, which are not limited herein. The first bracket 25 and the lidar 21 may be connected by bolts or other methods, which are not limited herein. In some examples, as shown in FIG. 7 , the first bracket 25 may include an L-shaped bracket, one end of the L-shaped bracket is fixedly connected with the casing of the nacelle 12 , and the other end is fixedly connected with the lidar 21 . The specific implementation of the connection between the L-shaped bracket and the housing of the nacelle 12 and the fixed connection with the lidar 21 is not limited herein. In some examples, when the lidar 21 is connected to the casing of the nacelle 12 through the first bracket 25 , the inclination angle of one end of the first bracket 25 connected to the lidar 21 is the same as the elevation angle of the impeller, so as to realize the multi-output of the lidar 21 . The scanning rotation axis 24 of the laser beam 23 is parallel to the axis of the impeller, which makes the distance represented by the acquired ranging data more reliable, and further improves the accuracy of the wind turbine tower clearance monitoring.

FIG. 8 is a schematic diagram of another example of the connection between the lidar and the cabin casing provided by the embodiment of the present application. As shown in FIG. 8 , the lidar 21 is located on the top of the casing of the nacelle 12 and is connected to the casing of the nacelle 12 through a second bracket 26 . The second bracket 26 and the casing of the nacelle 12 may be connected by bolts or other means, which are not limited herein. The second bracket 26 and the lidar 21 may be connected by bolts or other means, which are not limited herein. In some examples, as shown in FIG. 8 , the second bracket 26 may include an L-shaped bracket, one end of the L-shaped bracket is fixedly connected with the casing of the nacelle 12 , and the other end is fixedly connected with the lidar 21 . The specific implementation of the connection between the L-shaped bracket and the housing of the nacelle 12 and the fixed connection with the lidar 21 is not limited herein. In some examples, when the lidar 21 is connected to the casing of the nacelle 12 through the second bracket 26 , the inclination angle of the end of the second bracket 26 connected to the lidar 21 is the same as the elevation angle of the impeller, so that the lidar 21 emits more light. The scanning rotation axis 24 of the laser beam 23 is parallel to the axis of the impeller, which makes the distance represented by the acquired ranging data more reliable, and further improves the accuracy of the wind turbine tower clearance monitoring.

In some examples, the industrial computer 22 may acquire ranging data of the plurality of laser beams around the scanning rotation axis 24 within a predetermined rotation angle range from the lidar 21 . For example, FIG. 9 is a schematic diagram of an example of a predetermined rotation angle range provided by an embodiment of the present application. As shown in FIG. 9 , the predetermined rotation angle range is α, and the symmetry axis 27 of the predetermined rotation angle range α is parallel to the center line of the tower 13 . In order to ensure that at least two blades 11 of the wind turbine can be scanned, the predetermined rotation angle range α may be greater than or equal to 120°, which may be set according to application scenarios and application requirements, which is not limited herein. For example, the predetermined rotation angle range α includes 120°, 150° or 180°.

The ranging data obtained from the laser radar 21 within the predetermined rotation angle range α of the multiple laser beams around the scanning rotation axis 24 is sufficient to determine the number of laser beams that are not blocked by the blades 11 and the tower 13 , and it is not necessary to obtain multiple laser beams. All ranging data obtained by the laser beam rotating 360° around the scanning rotation axis 24 reduces the resources occupied by determining the number of laser beams that are not blocked by the blades 11 and the tower 13, and simplifies the determination of the number of laser beams that are not blocked by the blades 11 and the tower. The process of the number of laser beams blocked by the barrel 13.

In some embodiments, the wind turbine tower clearance monitoring system may further include a Programmable Logic Controller (PLC). FIG. 10 is a schematic structural diagram of another embodiment of the wind turbine tower tower clearance monitoring system provided by the present application. The difference between FIG. 10 and FIG. 2 is that the wind turbine tower clearance monitoring system shown in FIG. 10 may further include a programmable logic controller 27 .

The programmable logic controller 27 is connected to the industrial computer 22, and the connection between the programmable logic controller 27 and the industrial computer 22 may be a wired connection or a wireless connection, which is not limited herein. The programmable logic controller 27 may be embodied as a fan controller or other controllers, processors, devices, etc., which are not limited herein. The programmable logic controller 27 is used to receive the clearance warning signal sent by the industrial computer 22, and control the wind turbine pitch according to the clearance warning signal. Specifically, the programmable logic controller 27 receives the clearance warning signal sent by the industrial computer 22, and can control the wind turbine to retract the blades, so as to prevent the wind turbine from continuing to run and cause the blades to sweep the tower, thereby avoiding damage to the wind turbine and ensuring that Safety of wind turbines.

The present application also provides a wind turbine. The wind power generator set may include the wind power generator set tower clearance monitoring system in the above-mentioned embodiment, and the specific content can refer to the relevant description in the above-mentioned embodiment, which will not be repeated here.

It should be clear that each embodiment in this specification is described in a progressive manner, and the same or similar parts of each embodiment may be referred to each other, and each embodiment focuses on the differences from other embodiments. place. For the wind turbine embodiment, reference may be made to the description part of the embodiment of the wind turbine tower clearance monitoring system. The present application is not limited to the specific structures described above and shown in the drawings. Those skilled in the art may make various changes, modifications and additions, or change the order between steps, after comprehending the spirit of the present application. Also, for the sake of brevity, detailed descriptions of known technologies are omitted here.

Those skilled in the art should understand that the above-mentioned embodiments are all illustrative and not restrictive. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Those skilled in the art should be able to understand and implement other variant embodiments of the disclosed embodiments on the basis of studying the drawings, the description and the claims. In the claims, the term "comprising" does not exclude other means or steps; the term "a" does not exclude a plurality; the terms "first" and "second" are used to denote names rather than any particular order . Any reference signs in the claims should not be construed as limiting the scope. The functions of several parts presented in the claims can be implemented by a single hardware or software module. The mere presence of certain technical features in different dependent claims does not imply that these features cannot be combined to advantage.

Claims (6)

1. A wind generating set tower headroom monitoring system, comprising:

the laser radar is arranged on an engine room shell of the wind generating set and is positioned between a rotating plane of an impeller of the wind generating set and a vertical plane where a center line of a tower barrel is located, the vertical plane is parallel to the rotating plane of the impeller, the laser radar comprises a plurality of transceiving components, and the number of the transceiving components is selected from 16, 32 and 64;

the industrial personal computer is connected with the laser radar;

the laser radar is positioned at the bottom of the cabin shell and is connected with the cabin shell through a first support; or the laser radar is positioned at the top of the cabin shell and is connected with the cabin shell through a second bracket;

the first support comprises an L-shaped support, the second support comprises the L-shaped support, one end of the L-shaped support is fixedly connected with the cabin shell, and the other end of the L-shaped support is fixedly connected with the laser radar.

2. The system of claim 1,

under the condition that the laser radar is connected with the cabin shell through the first support, the inclination angle of one end, connected with the laser radar, of the first support is the same as the elevation angle of the impeller;

in the case where the laser radar is connected to the nacelle cover through the second bracket, the inclination angle of the end of the second bracket to which the laser radar is connected is the same as the elevation angle of the impeller.

3. The system of claim 1 or 2, wherein the industrial personal computer obtains the ranging data of a plurality of laser beams within a predetermined rotation angle range around a scanning rotation axis from the laser radar, a symmetry axis of the predetermined rotation angle range being parallel to a center line of the tower.

4. The system of claim 3, wherein the predetermined range of rotational angles comprises 120 °, 150 °, or 180 °.

5. The system of claim 1 or 2, further comprising:

and the programmable logic controller is connected with the industrial personal computer and used for receiving the clearance early warning signal sent by the industrial personal computer and controlling the pitch of the wind generating set according to the clearance early warning signal.

6. A wind park comprising a wind park tower headroom monitoring system according to any of claims 1 to 5.

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