Wind power tower anti-overturning monitoring and protection system and method

Abstract

The invention discloses an anti-overturning monitoring and protection system for a wind power tower drum, and the system comprises a work station which is disposed in a booster station and is provided with a simulation analysis model of the wind power tower drum; the wind speed and direction sensor is used for collecting wind speed and direction data; the strain sensor is used for collecting stress data borne by the wind power tower; the relative displacement sensor is used for collecting relative displacement data of the upper end and the lower end of the wind power tower; and the external load applying device is used for applying an anti-overturning load to the wind power tower. When the relative displacement reaches a set displacement threshold value, the work station analyzes the stress condition of the wind power tower tube according to the wind speed and direction data and corrects the simulation analysis model in combination with the stress data and the relative displacement data, and the simulation analysis model obtains an optimal additional load scheme for preventing the wind power tower tube from overturning; and the external load applying device applies an anti-overturning additional load to the tower drum of the wind tower according to the optimal additional load scheme. The invention further discloses an anti-overturning monitoring and protecting method for the wind power tower drum.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power generation, and specifically relates to a wind power tower anti-overturning monitoring and protection system and method. Background Art

[0002] With the continuous advancement of clean and low-carbon energy transformation, renewable energy has developed rapidly due to its clean, safe and sustainable development characteristics. As one of the renewable energy sources, wind energy has good economic performance and large-scale development and utilization value. With the development of wind power generation technology, the proportion of towers in high-tower solutions has increased, but due to the limitations of tower manufacturing technology and the characteristics of concrete materials themselves, there are still problems such as poor quality stability, long construction period and complex installation. There are also many risk diseases that are different from steel towers, and operation and maintenance are difficult.

[0003] In the existing technology, typical monitoring parameters of wind tower pile foundations include foundation vibration, foundation displacement, foundation inclination angle, foundation stress and strain, seepage, corrosion, scour, etc. However, the problem cannot be solved immediately and needs to be processed and analyzed, and then repaired manually. In addition, the data used is completely based on the corresponding sensors, and the sensitivity of the sensors affects the data analysis. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a wind turbine tower anti-overturning monitoring and protection system and method, which can monitor the inclination degree of the tower, the strain of the tower body, and the wind speed and direction in real time, and by applying an anti-overturning load to the wind turbine tower, it can effectively prevent the wind turbine tower from overturning and damage.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: The present invention first proposes a wind turbine tower anti-overturning monitoring and protection system, comprising: A workstation, installed in the booster station, creates a simulation analysis model of the wind turbine tower; Wind speed and direction sensor, installed on the top of the wind turbine tower to collect wind speed and direction data; Strain sensors are installed on wind turbine towers to collect stress data on wind turbine towers; A relative displacement sensor is installed inside the wind turbine tower to collect relative displacement data between the upper and lower ends of the wind turbine tower; An external load applying device, used to apply an anti-overturning load to the wind turbine tower; The wind speed and direction sensor, strain sensor and relative displacement sensor respectively transmit the collected wind speed and direction data, stress data and relative displacement data to the workstation through the data acquisition instrument, and when the relative displacement between the upper and lower ends of the wind turbine tower reaches the set displacement threshold, the workstation performs finite element simulation analysis on the stress condition of the wind turbine tower according to the wind speed and direction data, and corrects the simulation analysis model in combination with the stress data and relative displacement data. The simulation analysis model calculates all additional load schemes based on the external load application device, and obtains the optimal additional load scheme to prevent the wind turbine tower from overturning. The external load application device applies an anti-overturning additional load to the wind tower according to the optimal additional load scheme.

[0006] Further, the relative displacement sensor comprises an upper hinge support, a lower hinge support, a horizontal displacement meter and a tension sensor; The upper hinge support is fixedly installed on the top of the wind turbine tower, and the lower hinge support is fixedly installed on the bottom surface of the wind turbine tower; An elastic rope is provided between the upper hinge support and the lower hinge support, and the two ends of the elastic rope are fixedly connected to the upper hinge support and the lower hinge support respectively, and the tension sensor is used to monitor the tension of the elastic rope to ensure that the elastic rope remains in a straightened state; The horizontal displacement meter includes a mounting seat arranged on the bottom surface of the wind turbine tower, a vertical column rotatably matched with the mounting seat, and a telescopic cross bar installed on the vertical column, the end of the telescopic cross bar is provided with a ring hook sleeved outside the elastic rope, and an angle sensor for detecting the rotation angle of the vertical column is provided between the mounting seat and the vertical column.

[0007] Furthermore, the principle of the relative displacement sensor collecting the relative displacement data of the upper and lower ends of the wind turbine tower is as follows: in: is the relative displacement between the upper and lower ends of the wind turbine tower; The horizontal displacement meter measures the height position of the horizontal displacement of the elastic rope; The elastic rope is measured at a height of Horizontal displacement at position; It is the horizontal distance from the given position on the bottom of the wind tower to the lower hinge support; For elastic ropes at height The horizontal distance of the initial position at position relative to the given position; is the inclination angle of the elastic rope relative to the bottom surface of the wind turbine tower in the initial position; is the length of the elastic rope in the initial position; is the inclination angle of the elastic rope relative to the bottom surface of the wind turbine tower when the upper end of the wind turbine tower is inclined relative to the lower end; is the length of the elastic rope when the upper end of the wind turbine tower is inclined relative to the lower end, and: in: is the length of the telescopic crossbar when the elastic rope is in the initial position; It is the length of the telescopic crossbar after the elastic rope produces horizontal displacement; is the angle of rotation of the vertical column relative to the mounting base; The difference between the tension of the elastic rope measured by the tension sensor when the upper end of the wind turbine tower is tilted relative to the lower end and the tension at the initial position; is the elastic coefficient of the elastic rope.

[0008] Furthermore, the wind turbine tower is manufactured by splicing and assembling a plurality of tower walls.

[0009] Furthermore, the strain sensor is arranged at a connection seam between two adjacent tower walls in the vertical direction and at a middle position of the tower wall.

[0010] Furthermore, the strain sensor includes two mutually perpendicular strain gauges, and the two strain gauges are connected by a Wheatstone half-bridge.

[0011] Further, the external load applying device includes at least three external load applying units evenly distributed in an annular manner around the wind turbine tower, and the external load applying unit includes a traction support, a first test block and a first load applying device; the traction support is fixedly mounted on the basis of the wind turbine tower, the first test block is limitedly matched with the basis of the wind turbine tower, and the first load applying device is fixedly mounted on the traction support; At least one hook is provided on each of the tower walls, a connecting plate is provided on the traction support, a first traction rope is provided between the hook and the corresponding connecting plate, the connecting plate and the first load applying device are connected by a first force applying rope, and the first load applying device applies traction to the corresponding tower wall through the first force applying rope and the first traction rope; a second traction rope is provided between the first test block and at least one of the first load applying devices, the first load applying device is connected to at least one of the first test blocks through the second traction rope, and the second traction rope is used to balance the tension applied by the first force applying rope to the first load applying device.

[0012] Furthermore, the external load applying device comprises an annular track arranged around the wind turbine tower, a second load applying device movable along the annular track, and a second test block limitedly matched with the foundation of the wind turbine tower; An inner support and an outer support are respectively provided on the inner and outer sides of the annular track; at least three first connecting plates movable in the radial direction are evenly distributed in an annular pattern on the inner support, and second connecting plates movable in the radial direction are provided on the outer support in one-to-one correspondence with the first connecting plates; At least one hook is provided on each of the tower walls, and a third traction rope is provided between the hook and the first connecting plate; a plurality of second test blocks are evenly distributed in an annular pattern, and a fourth traction rope is provided between the second test block and at least one of the second connecting plates, and the second connecting plate is connected to at least one of the second test blocks through the fourth traction rope; a first connecting head is provided on the first connecting plate; and a second connecting head is provided on the second connecting plate; An inner connecting plate and an outer connecting plate which can move along the radial direction are respectively provided on the inner and outer sides of the second load applying device; a first electromagnetic connecting head is provided on the inner connecting plate corresponding to the first connecting head, and the first electromagnetic connecting head and the first connecting head can be connected or disconnected by electromagnetic force; a second force applying rope is provided between the inner connecting plate and the first load applying device, and a traction force is applied to the corresponding tower wall by applying tension to the second force applying rope; a second electromagnetic connecting head is provided on the outer connecting plate corresponding to the second connecting head, and the second electromagnetic connecting head and the second connecting head can be connected or disconnected by electromagnetic force, and the fourth traction rope is used to balance the tension applied by the second force applying rope to the second load applying device.

[0013] Furthermore, the wind speed and direction sensors are installed around the top of the wind turbine tower.

[0014] The present invention also proposes a wind power tower anti-overturning monitoring and protection method, comprising the following steps: Step 1: Establish a simulation analysis model Establish a simulation analysis model of the wind turbine tower in the workstation; Step 2: Data collection and monitoring The wind speed and direction data are collected using wind speed and direction sensors installed on the wind turbine tower; The strain sensor installed on the wind turbine tower is used to collect the stress data of the wind turbine tower; The relative displacement sensor is used to collect the relative displacement data of the upper and lower ends of the wind turbine tower; Step 3: Determine whether the relative displacement between the upper and lower ends of the wind turbine tower reaches a set displacement threshold: if so, execute step 4; if not, execute step 2; Step 4: Wind tower stress analysis The collected wind speed and direction data are added to the simulation analysis model to analyze the stress conditions of the wind turbine tower; Step 5: Modify the simulation analysis model Add the collected stress data and relative displacement data to the simulation analysis model to modify the simulation analysis model; Step 6: Find the optimal load solution Based on the external load application device, all additional load schemes are calculated using the simulation analysis model, and the optimal additional load scheme to prevent the wind turbine tower from overturning is obtained; Step 7: Apply additional anti-overturning load Based on the optimal additional load solution obtained by solving the problem, an external load application device is used to apply an anti-overturning additional load to the wind tower.

[0015] The beneficial effects of the present invention are: The wind turbine tower anti-overturning monitoring and protection system of the present invention can collect wind speed and direction data in real time by means of a wind speed and direction sensor arranged on the top of the wind turbine tower, so as to monitor the wind load on the wind turbine tower in real time; can monitor the stress data on the wind turbine tower in real time by means of a strain sensor arranged on the wind turbine tower; can measure the relative displacement data of the upper and lower ends of the wind turbine tower in real time by means of a relative displacement sensor arranged inside the wind turbine tower, that is, can monitor the deformation of the wind turbine tower in real time; in particular, when the relative displacement between the upper and lower ends of the wind turbine tower reaches a set displacement threshold, it indicates that the wind turbine tower has If there is a risk of overturning, the simulation analysis model created in the workstation is used to analyze the stress condition of the wind turbine tower based on the wind speed and direction data, and the simulation analysis model is corrected in combination with the stress data and the relative displacement data. Finally, the optimal additional load scheme is obtained, and an external load application device is used to apply an anti-overturning additional load to the wind tower to prevent the wind turbine tower from overturning. In summary, the wind turbine tower anti-overturning monitoring and protection system of the present invention can monitor the inclination degree of the tower, the tower body strain, and the wind speed and direction in real time, and by applying an anti-overturning load to the wind turbine tower, it can effectively prevent the wind turbine tower from overturning and damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration: Figure 1 It is a structural schematic diagram of the wind power tower anti-overturning monitoring and protection system of the present invention; Figure 2 It is a structural schematic diagram of a relative displacement sensor; Figure 3 for Figure 2 A magnified view of area B; Figure 4 The schematic diagram of the horizontal displacement meter for measuring horizontal displacement; Figure 5 is the schematic diagram of the relative displacement sensor; Figure 6 for Figure 3 A partial enlarged view of Figure 7 for Figure 1 A magnified view of region A, specifically a structural schematic diagram of the first method; Figure 8 for Figure 5 A magnified view of region C; Fig. 9 for Figure 1 A magnified view of region A, specifically a structural schematic diagram of the second method; Fig.10 for Figure 7 A magnified view of region D; Fig.11 The present invention is a flow chart of the wind turbine tower anti-overturning monitoring and protection method.

[0017] Description of reference numerals: 10-wind power tower; 11-foundation; 12-anti-collision ring; 13-hook; 20-workstation; 21-boosting station; 22-data acquisition instrument; 30-wind speed and direction sensor; 40-strain sensor; 50-relative displacement sensor; 51-upper hinge support; 52-lower hinge support; 53-horizontal displacement meter; 531-mounting seat; 532-vertical column; 533-telescopic crossbar; 534-ring hook; 535-angle sensor; 54-tension sensor; 55-elastic rope; 56-given position; 57-initial position; 58-tilted position; 60-external load applying device; 61-traction support; 62-first test block; 63-first load applying device; 64-connecting plate; 65-first traction rope; 66-first force applying rope; 67-second traction rope; 68-first guide wheel; 71-annular track; 72-second load-applying device; 73-second test block; 74-inner support; 75-outer support; 76-first connecting plate; 77-second connecting plate; 78-third traction rope; 79-fourth traction rope; 80-first connector; 81-second connector; 82-inner connecting plate; 83-outer connecting plate; 84-first electromagnetic connector; 85-second force-applying rope; 86-second electromagnetic connector; 87-second guide wheel; 88-first drive rod; 89-second drive rod. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0019] like Figure 1 As shown, the wind turbine tower anti-overturning monitoring and protection system of this embodiment includes: A workstation 20 is installed in the booster station 21 and has a simulation analysis model of the wind power tower 10 created; A wind speed and direction sensor 30 is installed on the top of the wind turbine tower 10 to collect wind speed and direction data; The strain sensor 40 is installed on the wind turbine tower 10 to collect stress data on the wind turbine tower 10; A relative displacement sensor 50 is installed inside the wind turbine tower 10 to collect relative displacement data between the upper end and the lower end of the wind turbine tower 10; The external load applying device 60 is used to apply an anti-overturning load to the wind turbine tower 10 .

[0020] Specifically, in the present embodiment, the wind speed and direction sensor 30, the strain sensor 40 and the relative displacement sensor 50 respectively transmit the collected wind speed and direction data, stress data and relative displacement data to the workstation 20 through the data acquisition instrument 22, and when the relative displacement between the upper and lower ends of the wind turbine tower 10 reaches the set displacement threshold, the workstation 20 performs finite element simulation analysis on the stress condition of the wind turbine tower 10 according to the wind speed and direction data, and modifies the simulation analysis model in combination with the stress data and the relative displacement data. The simulation analysis model calculates all the additional load schemes based on the external load application device 60, and obtains the optimal additional load scheme to prevent the wind turbine tower 10 from overturning. The external load application device 60 applies an anti-overturning additional load to the wind tower 10 according to the optimal additional load scheme.

[0021] Specifically, in this embodiment, wind speed and direction sensors 30 are installed around the top of the wind turbine tower 10. The wind speed and direction sensors 30 at multiple positions are used to cross-check the collected wind speed and direction data to improve the accuracy of the collected wind speed and direction data.

[0022] Specifically, the wind turbine tower 10 is made by splicing and assembling a plurality of tower walls, and the strain sensor 40 is arranged at the connection seam between two adjacent tower walls in the vertical direction and at the middle position of the tower wall. The strain sensor 40 of this embodiment includes two mutually perpendicular strain gauges, which are connected by a Wheatstone half bridge, and can monitor the stress of the wind turbine tower 10 in real time.

[0023] At present, the method for measuring the relative displacement of the upper and lower ends of the wind turbine tower 10 can use a total station to measure the geometric relationship between the tower height and the straight-line distance to calculate the relative displacement of the upper and lower ends of the tower. However, this method requires standing outside the tower, and manually operating the measurement and recording in real time, and the equipment cost is high. In order to measure the relative displacement of the upper and lower ends of the wind turbine tower 10 in real time and transmit it remotely to the workstation 20, it is arranged inside the wind turbine tower 10 to reduce the footprint and external environmental impact.

[0024] Specifically, Figure 2 As shown, the relative displacement sensor 50 of this embodiment includes an upper hinge support 51, a lower hinge support 52, a horizontal displacement meter 53 and a tension sensor 54. The upper hinge support 51 is fixedly mounted on the top of the wind turbine tower 10, and the lower hinge support 52 is fixedly mounted on the bottom surface of the wind turbine tower 10. An elastic rope 55 is provided between the upper hinge support 51 and the lower hinge support 52, and the two ends of the elastic rope 55 are fixedly connected to the upper hinge support 51 and the lower hinge support 52 respectively. The tension sensor 54 is used to monitor the tension of the elastic rope 55 to ensure that the elastic rope 55 remains in a straightened state.

[0025] like Figure 3 As shown, the horizontal displacement meter 53 is used to measure the horizontal displacement of the elastic rope 55 at a set height position. The horizontal displacement meter 53 of this embodiment includes a mounting seat 531 arranged on the bottom surface of the wind power tower 10, a vertical column 532 rotatably matched with the mounting seat 531, and a telescopic crossbar 533 installed on the vertical column 532, and the length of the telescopic crossbar 533 can be extended or shortened. The end of the telescopic crossbar 533 of this embodiment is provided with a ring hook 534 sleeved outside the elastic rope 55, and an angle sensor 535 for detecting the rotation angle of the vertical column 532 is provided between the mounting seat 531 and the vertical column 532.

[0026] Specifically, Figure 5-6 As shown, the principle of the relative displacement sensor 50 of this embodiment to collect the relative displacement data between the upper end and the lower end of the wind turbine tower 10 is: in: is the relative displacement between the upper end and the lower end of the wind turbine tower 10; The horizontal displacement meter 53 measures the height position of the horizontal displacement of the elastic rope 55; The elastic rope 55 is measured by the horizontal displacement meter 53 at a height of The horizontal displacement at the position, i.e. the horizontal distance between the initial position 57 and the inclined position 58; is the horizontal distance from a given position 56 on the bottom surface of the wind power tower 10 to the lower hinge support 52; For elastic rope 55 at height The horizontal distance of the initial position 57 at the position relative to the given position 56; is the inclination angle of the elastic rope 55 relative to the bottom surface of the wind turbine tower 10 when the elastic rope 55 is in the initial position 57; is the length of the elastic rope 55 at the initial position 57; is the inclination angle of the elastic rope 55 relative to the bottom surface of the wind turbine tower 10 when the upper end of the wind turbine tower 10 is inclined relative to the lower end; is the length of the elastic rope 55 when the upper end of the wind turbine tower 10 is inclined relative to the lower end, and Figure 4 As shown in the figure, the dotted line is the position of the telescopic crossbar 533 when the elastic rope 55 is at the initial position 57, and the solid line is the position of the telescopic crossbar 533 after the elastic rope 55 produces a horizontal displacement. Horizontal displacement at position is equal to the displacement of the annular hook 534, that is: in: is the length of the telescopic crossbar 533 when the elastic rope 55 is in the initial position 57; is the length of the telescopic crossbar 533 after the elastic rope 55 produces horizontal displacement; It is the rotation angle of the vertical column 532 relative to the mounting base 531. The length of the telescopic crossbar 533 can be measured in real time by a displacement sensor or the like.

[0027] in: The difference between the tension of the elastic rope 55 measured by the tension sensor 54 when the upper end of the wind turbine tower 10 is tilted relative to the lower end and the tension at the initial position 57; is the elastic coefficient of the elastic rope 55. The vertical height of the wind turbine tower 10 changes due to the change of the vertical force, so the vertical height of the wind turbine tower 10 keeps changing, so the change value of the horizontal side cannot be calculated by comparing the vertical side with the hypotenuse to obtain the angle before and after the change. For this reason, the present embodiment adds a horizontal displacement measurement at the bottom position to obtain the angle before and after the change, and finally calculates the relative displacement of the upper and lower ends of the wind turbine tower 10. The relative displacement sensor 50 of the present embodiment is not limited to the vertical corresponding position, and the upper and lower positions can be arranged diagonally. The straight-line distance between the upper hinge support 51 and the lower hinge support 52 can be measured by the tension sensor 54 and the elastic rope 55, and the upper hinge support 51 and the lower hinge support 52 are used to ensure the force-bearing length of the elastic rope 55. A horizontal displacement meter 53 is arranged at a height near the ground next to the lower hinge support 52 to measure the horizontal position of the elastic rope 55 at a fixed height.

[0028] Specifically, the external load applying device 60 can be implemented in two ways.

[0029] (1) The first method like Figure 7-8 As shown, the external load applying device 60 includes at least three external load applying units that are evenly distributed around the wind turbine tower 10 in an annular manner, and the external load applying unit includes a traction support 61, a first test block 62, and a first load applying device 63. The traction support 61 is fixedly mounted on the foundation 11 of the wind turbine tower 10, the first test block 62 is limitedly matched with the foundation 11 of the wind turbine tower 10, and the first load applying device 63 is fixedly mounted on the traction support 61. Preferably, an anti-collision ring 12 is provided on the foundation 11 to prevent rigid collision between the first test block 62 and the foundation 11.

[0030] At least one hook 13 is provided on each tower wall, a connecting plate 64 is provided on the traction support 61, a first traction rope 65 is provided between the hook 13 and the corresponding connecting plate 64, a first force application rope 66 is used to connect the connecting plate 64 and the first load application device 63, and the first load application device 63 applies traction to the corresponding tower wall through the first force application rope 66 and the first traction rope 65. In this embodiment, a plurality of first test blocks 62 are provided around the foundation 11 of the wind power tower 10, a second traction rope 67 is provided between each first test block 62 and at least one first load application device 63, and each first load application device 63 is connected to at least one first test block 62 through the second traction rope 67, and the second traction rope 67 is used to balance the tension applied by the first force application rope 66 to the first load application device 63. In this embodiment, two hooks 13 are provided on each tower wall. Of course, in the preferred implementation of this embodiment, a first guide wheel 68 for guiding the first traction rope 65 and the second traction rope 67 is provided on the traction support 61.

[0031] In this embodiment, the first load force applying device 63 adopts an electric hoist. In this way, the wind turbine tower 10 is divided into regions according to the external load applying units uniformly distributed in an annular manner, and the first load force applying device 63 of each external load applying unit can apply traction to the tower wall of the corresponding region through the first force applying rope 66 and the first traction rope 65. The simulation analysis model can calculate all additional load schemes based on the regional division of the wind turbine tower 10 by the external load applying device 60, and obtain the optimal additional load scheme to prevent the wind turbine tower 10 from overturning. Then, each first load force applying device 63 applies a corresponding amount of traction to the tower wall of the corresponding region through the first force applying rope 66 and the first traction rope 65 according to the optimal additional load scheme to prevent the wind turbine tower 10 from overturning.

[0032] (2) Second method like Figure 9-10As shown, the external load applying device 60 includes an annular track 71 arranged around the wind turbine tower 10 , a second load applying device 72 movable along the annular track 71 , and a second test block 73 limitedly engaged with the foundation 11 of the wind turbine tower 10 .

[0033] In this embodiment, an inner support 74 and an outer support 75 are respectively provided on the inner and outer sides of the annular track 71. The inner support 74 is provided with at least three first connecting plates 76 that can move in the radial direction in an annular manner, and the outer support 75 is provided with second connecting plates 77 that can move in the radial direction in a one-to-one correspondence with the first connecting plates 76.

[0034] At least one hook 13 is provided on each tower wall, and a third traction rope 78 is provided between the hook 13 and the first connecting plate 76, and the two ends of the third traction rope 78 are fixedly connected to the hook 13 and the first connecting plate 76 respectively. A plurality of second test blocks 73 are evenly distributed in a ring, and a fourth traction rope 79 is provided between the second test block 73 and at least one second connecting plate 77, and the second connecting plate 77 is connected to at least one second test block 73 through the fourth traction rope 79. A first connector 80 is provided on the first connecting plate 76; a second connector 81 is provided on the second connecting plate 77. Second guide wheels 87 for guiding the third traction rope 78 and the fourth traction rope 79 are provided on the inner support 74 and the outer support 75 respectively.

[0035] The inner and outer sides of the second load force applying device 72 are respectively provided with an inner connecting plate 82 and an outer connecting plate 83 that can move in the radial direction. A first electromagnetic connector 84 is provided on the inner connecting plate 82 corresponding to the first connector 80, and the first electromagnetic connector 84 can be connected or disconnected with the first connector 80 by electromagnetic force. The second load force applying device 72 is provided with a first driving rod 88 for driving the inner connecting plate 82 to move in the radial direction to achieve the docking or disconnection of the first connector 80 with the first electromagnetic connector 84. The first driving rod 88 can be an electric cylinder. Specifically, in this embodiment, a spherical connector is provided on the first connector 80, and a spherical connecting groove adapted to the spherical connector is provided on the first electromagnetic connector 84. In this embodiment, a second force rope 85 is provided between the inner connecting plate 82 and the second load force applying device 72, and the second load force applying device 72 applies a pulling force to the second force rope 85 to apply a traction force to the corresponding tower wall. In this embodiment, a second electromagnetic connector 86 is provided on the outer connecting plate 83 corresponding to the second connector 81, and the second electromagnetic connector 86 can be connected or disconnected with the second connector 81 by electromagnetic force. A second drive rod 89 is provided on the second load force applying device 72 for driving the outer connecting plate 83 to move along the radial direction to achieve docking or disconnection between the second connector 81 and the second electromagnetic connector 86. The second drive rod 89 can be an electric cylinder. The fourth traction rope 79 is used to balance the tension applied by the second force rope 85 to the second load force applying device 72. In this embodiment, a spherical connector is provided on the second connector 81, and the second electromagnetic connector 86 is provided with a spherical connection groove adapted to the spherical connector.

[0036] The wind turbine tower 10 is divided into regions according to the first connection plates 76 uniformly distributed in an annular manner. Each first connection plate 76 can be connected to the tower wall of the corresponding region through the third traction rope 78, and the traction force is applied to the tower wall of the corresponding region through the second load force applying device 72 and the second force applying rope 85. Specifically, in this embodiment, the second load force applying device 72 adopts an electric hoist and is provided as at least one. When the second load force applying device 72 is provided as at least two, different second load force applying devices 72 are connected to different first connectors 80 and second connectors 81 through the first electromagnetic connector 84 and the second electromagnetic connector 86, so that traction can be applied to the tower wall of different regions respectively. The simulation analysis model can divide the area of ​​the wind turbine tower 10 based on the external load application device 60, calculate all additional load schemes, and obtain the optimal additional load scheme to prevent the wind turbine tower 10 from overturning. Then, each first load application device 63 applies a traction force of corresponding magnitude to the tower wall of the corresponding area through the first force application rope 66 and the first traction rope 65 according to the optimal additional load scheme to prevent the wind turbine tower 10 from overturning.

[0037] The specific implementation of the wind turbine tower anti-overturning monitoring and protection method is described in detail below in conjunction with the wind turbine tower anti-overturning monitoring and protection system described above in this embodiment.

[0038] like Fig.11 As shown, the wind turbine tower anti-overturning monitoring and protection method of this embodiment includes the following steps.

[0039] Step 1: Establish a simulation analysis model.

[0040] A simulation analysis model of the wind turbine tower 10 is established in the workstation 20 .

[0041] Step 2: Data collection and monitoring.

[0042] The wind speed and direction data are collected by using the wind speed and direction sensor 30 installed on the wind turbine tower 10; The strain sensor 40 installed on the wind turbine tower 10 is used to collect stress data on the wind turbine tower 10; The relative displacement sensor 50 is used to collect relative displacement data of the upper end and the lower end of the wind turbine tower 10 .

[0043] Step 3: Determine whether the relative displacement between the upper end and the lower end of the wind turbine tower 10 reaches a set displacement threshold: if so, execute step 4; if not, execute step 2.

[0044] Step 4: Force analysis of wind turbine tower 10.

[0045] The collected wind speed and direction data are added to the simulation analysis model to analyze the stress condition of the wind turbine tower 10 .

[0046] Step 5: Modify the simulation analysis model.

[0047] The collected stress data and relative displacement data are added to the simulation analysis model to correct the simulation analysis model. Specifically, the overall strain is corrected by using the strain of the tower body and the average strain error of the corresponding position of the simulation analysis, wherein the data with an error value exceeding 10% (predetermined threshold) is eliminated, and later manual investigation is performed to determine whether the strain gauge is damaged or there are cracks in the wind turbine tower 10. When the strain of the corrected simulation analysis model exceeds 70% (predetermined threshold) of the design value, according to the number of additional load arrangement schemes of the wind turbine tower 10, they are substituted into the corrected simulation model of the workstation 20 one by one to find the optimal scheme with the least number of force hooks 13 of the wind turbine tower 10.

[0048] Step 6: Solve the optimal load solution.

[0049] Based on the external load applying device 60, all additional load solutions are calculated using the simulation analysis model, and the optimal additional load solution for preventing the overturning of the wind turbine tower 10 is obtained. The search process can use a neural network algorithm to provide other load application requirements (such as: uniform force on the tower, etc.), and perform simulation analysis to reduce the computing load of the workstation 20.

[0050] Step 7: Apply additional anti-overturning load.

[0051] Based on the optimal additional load solution obtained by solving, an external load applying device 60 is used to apply an anti-overturning additional load to the wind tower barrel 10 .

[0052] The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A wind turbine tower anti-overturning monitoring and protection system, characterized in that: include: A workstation, installed in the booster station, creates a simulation analysis model of the wind turbine tower; Wind speed and direction sensor, installed on the top of the wind turbine tower to collect wind speed and direction data; Strain sensors are installed on wind turbine towers to collect stress data on wind turbine towers; A relative displacement sensor is installed inside the wind turbine tower to collect relative displacement data between the upper and lower ends of the wind turbine tower; An external load applying device, used to apply an anti-overturning load to the wind turbine tower; The wind speed and direction sensor, strain sensor and relative displacement sensor respectively transmit the collected wind speed and direction data, stress data and relative displacement data to the workstation through the data acquisition instrument, and when the relative displacement between the upper and lower ends of the wind turbine tower reaches the set displacement threshold, the workstation performs finite element simulation analysis on the stress condition of the wind turbine tower according to the wind speed and direction data, and corrects the simulation analysis model in combination with the stress data and relative displacement data. The simulation analysis model calculates all additional load schemes based on the external load application device, and obtains the optimal additional load scheme to prevent the wind turbine tower from overturning. The external load application device applies an anti-overturning additional load to the wind tower according to the optimal additional load scheme.

2. The wind turbine tower anti-overturning monitoring and protection system according to claim 1 is characterized in that: The relative displacement sensor comprises an upper hinge support, a lower hinge support, a horizontal displacement meter and a tension sensor; The upper hinge support is fixedly installed on the top of the wind turbine tower, and the lower hinge support is fixedly installed on the bottom surface of the wind turbine tower; An elastic rope is provided between the upper hinge support and the lower hinge support, and the two ends of the elastic rope are fixedly connected to the upper hinge support and the lower hinge support respectively, and the tension sensor is used to monitor the tension of the elastic rope to ensure that the elastic rope remains in a straightened state; The horizontal displacement meter includes a mounting seat arranged on the bottom surface of the wind turbine tower, a vertical column rotatably matched with the mounting seat, and a telescopic cross bar installed on the vertical column, the end of the telescopic cross bar is provided with a ring hook sleeved outside the elastic rope, and an angle sensor for detecting the rotation angle of the vertical column is provided between the mounting seat and the vertical column.

3. The wind turbine tower anti-overturning monitoring and protection system according to claim 2 is characterized in that: The principle of the relative displacement sensor collecting relative displacement data between the upper and lower ends of the wind turbine tower is as follows: in: is the relative displacement between the upper and lower ends of the wind turbine tower; The horizontal displacement meter measures the height position of the horizontal displacement of the elastic rope; The elastic rope is measured at a height of Horizontal displacement at position; It is the horizontal distance from the given position on the bottom of the wind tower to the lower hinge support; For elastic ropes at height The horizontal distance of the initial position at position relative to the given position; is the inclination angle of the elastic rope relative to the bottom surface of the wind turbine tower in the initial position; is the length of the elastic rope in the initial position; is the inclination angle of the elastic rope relative to the bottom surface of the wind turbine tower when the upper end of the wind turbine tower is inclined relative to the lower end; is the length of the elastic rope when the upper end of the wind turbine tower is inclined relative to the lower end, and: in: is the length of the telescopic crossbar when the elastic rope is in the initial position; It is the length of the telescopic crossbar after the elastic rope produces horizontal displacement; is the angle of rotation of the vertical column relative to the mounting base; The difference between the tension of the elastic rope measured by the tension sensor when the upper end of the wind turbine tower is tilted relative to the lower end and the tension at the initial position; is the elastic coefficient of the elastic rope.

4. The wind turbine tower anti-overturning monitoring and protection system according to claim 1 is characterized in that: The wind power tower is made by splicing and assembling a plurality of tower walls.

5. The wind turbine tower anti-overturning monitoring and protection system according to claim 4 is characterized in that: The strain sensor is arranged at a connection seam between two adjacent tower walls in the vertical direction and at a middle position of the tower wall.

6. The wind turbine tower anti-overturning monitoring and protection system according to claim 5 is characterized in that: The strain sensor includes two mutually perpendicular strain gauges, and the two strain gauges are connected by a Wheatstone half bridge.

7. The wind turbine tower anti-overturning monitoring and protection system according to claim 4 is characterized in that: The external load applying device comprises at least three external load applying units evenly distributed in an annular manner around the wind turbine tower, and the external load applying unit comprises a traction support, a first test block and a first load applying device; the traction support is fixedly mounted on the basis of the wind turbine tower, the first test block is limitedly matched with the basis of the wind turbine tower, and the first load applying device is fixedly mounted on the traction support; At least one hook is provided on each of the tower walls, a connecting plate is provided on the traction support, a first traction rope is provided between the hook and the corresponding connecting plate, the connecting plate and the first load applying device are connected by a first force applying rope, and the first load applying device applies traction to the corresponding tower wall through the first force applying rope and the first traction rope; a second traction rope is provided between the first test block and at least one of the first load applying devices, the first load applying device is connected to at least one of the first test blocks through the second traction rope, and the second traction rope is used to balance the tension applied by the first force applying rope to the first load applying device.

8. The wind turbine tower anti-overturning monitoring and protection system according to claim 4 is characterized in that: The external load applying device comprises an annular track arranged around the wind turbine tower, a second load applying device movable along the annular track, and a second test block limitedly matched with the foundation of the wind turbine tower; An inner support and an outer support are respectively provided on the inner and outer sides of the annular track; at least three first connecting plates movable in the radial direction are evenly distributed in an annular pattern on the inner support, and second connecting plates movable in the radial direction are provided on the outer support in one-to-one correspondence with the first connecting plates; At least one hook is provided on each of the tower walls, and a third traction rope is provided between the hook and the first connecting plate; a plurality of second test blocks are evenly distributed in an annular pattern, and a fourth traction rope is provided between the second test block and at least one of the second connecting plates, and the second connecting plate is connected to at least one of the second test blocks through the fourth traction rope; a first connecting head is provided on the first connecting plate; and a second connecting head is provided on the second connecting plate; An inner connecting plate and an outer connecting plate which can move along the radial direction are respectively provided on the inner and outer sides of the second load applying device; a first electromagnetic connecting head is provided on the inner connecting plate corresponding to the first connecting head, and the first electromagnetic connecting head and the first connecting head can be connected or disconnected by electromagnetic force; a second force applying rope is provided between the inner connecting plate and the first load applying device, and a traction force is applied to the corresponding tower wall by applying tension to the second force applying rope; a second electromagnetic connecting head is provided on the outer connecting plate corresponding to the second connecting head, and the second electromagnetic connecting head and the second connecting head can be connected or disconnected by electromagnetic force, and the fourth traction rope is used to balance the tension applied by the second force applying rope to the second load applying device.

9. The wind turbine tower anti-overturning monitoring and protection system according to claim 1 is characterized in that: The wind speed and direction sensors are installed around the top of the wind power tower.

10. A wind power tower anti-overturning monitoring and protection method, characterized in that: The steps include: Step 1: Establish a simulation analysis model Establish a simulation analysis model of the wind turbine tower in the workstation; Step 2: Data collection and monitoring The wind speed and direction data are collected using wind speed and direction sensors installed on the wind turbine tower; The strain sensor installed on the wind turbine tower is used to collect the stress data of the wind turbine tower; The relative displacement sensor is used to collect the relative displacement data of the upper and lower ends of the wind turbine tower; Step 3: Determine whether the relative displacement between the upper and lower ends of the wind turbine tower reaches a set displacement threshold: if so, execute step 4; if not, execute step 2; Step 4: Wind tower stress analysis The collected wind speed and direction data are added to the simulation analysis model to analyze the stress conditions of the wind turbine tower; Step 5: Modify the simulation analysis model Add the collected stress data and relative displacement data to the simulation analysis model to modify the simulation analysis model; Step 6: Find the optimal load solution Based on the external load application device, all additional load schemes are calculated using the simulation analysis model, and the optimal additional load scheme to prevent the wind turbine tower from overturning is obtained; Step 7: Apply additional anti-overturning load Based on the optimal additional load solution obtained by solving the problem, an external load application device is used to apply an anti-overturning additional load to the wind tower.

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