Control method of wind generating set

Abstract

The invention relates to a control method of a wind generating set, the wind generating set comprises a tower and a damping device, the tower comprises a tower body and a tower door, a hollow cavity is defined by the tower body and the tower door, the damping device is arranged in the hollow cavity and comprises a supporting platform and a movable part, and the movable part is elastically connected to the tower; the movable part is arranged on the supporting platform, and the movable part and the supporting platform can be switched between a locking state and an unlocking state. The control method comprises the steps that information is obtained; the wind speed of the environment where the wind generating set is located and vibration information of the tower are obtained; and a vibration suppression step: when the wind speed is greater than a first threshold value and the vibration data exceeds a first preset range, controlling the tower door to be closed, and controlling the movable part and the supporting platform to be switched from a locking state to an unlocking state, so that the movable part reciprocates along a direction far away from or close to the tower relative to the supporting platform, therefore, automatic vortex resistance and vibration suppression of the wind generating set are achieved, and safety is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of wind power technology, and in particular to a control method for a wind turbine generator set. Background Art

[0002] For wind turbines, when wind blows over the tower, vortices will alternately be generated on both sides of the tower and detach from the tower surface. This alternating vortex will generate periodic fluctuating pressure on the tower that changes along the flow and across the flow. The fluctuating pressure will induce periodic vibration of the tower, which in turn will change the vortex emission pattern of its wake, causing vortex-induced vibration of the tower.

[0003] In order to suppress the vortex-induced vibration of the tower, the current method is to install spoiler strips or damping devices on the tower. However, due to the lack of control over the damping devices, when vortex-induced vibration occurs, only passive vibration suppression of the wind turbine can be performed, which is uncontrollable and has low efficiency. Summary of the invention

[0004] The present application provides a control method for a wind turbine generator set, which can realize automatic anti-vortex vibration suppression of the wind turbine generator set and ensure the safety of the wind turbine generator set throughout its entire life cycle.

[0005] On the one hand, according to an embodiment of the present application, a control method for a wind turbine generator set is proposed, the wind turbine generator set includes a tower and a damping device, the tower includes a tower body and a tower door, the tower body and the tower door enclose a hollow cavity, the damping device is arranged in the hollow cavity and includes a supporting platform and a movable part, the movable part is elastically connected to the tower, the movable part is arranged on the supporting platform and can switch between a locked state and an unlocked state with the supporting platform, the control method includes: an information acquisition step; obtaining the wind speed of the environment in which the wind turbine generator set is located and the vibration information of the tower; a vibration suppression step, when the wind speed is greater than a first threshold value and the vibration data exceeds a first preset range, controlling the tower door to close, and controlling the movable part and the supporting platform to switch from a locked state to an unlocked state, so that the movable part reciprocates relative to the supporting platform in a direction away from or close to the tower.

[0006] According to one aspect of an embodiment of the present application, the vibration suppression step specifically includes: when the wind speed is greater than a first threshold value, controlling the tower door to close; if the vibration data is within a first preset range, controlling the movable part to remain in a locked state; if the vibration data exceeds the first preset range, controlling the movable part and the support platform to switch from a locked state to an unlocked state, so that the movable part reciprocates relative to the support platform in a direction away from or close to the tower.

[0007] According to one aspect of an embodiment of the present application, the movable part includes an airbag and an oxygen generator disposed in the airbag, the oxygen generator is configured to generate oxygen during the movement of the movable part relative to the supporting platform, and the vibration suppression step also includes: when the oxygen pressure in the airbag is greater than a second threshold value, controlling the release of oxygen into the hollow cavity.

[0008] According to one aspect of an embodiment of the present application, the wind turbine generator set also includes a nacelle, an impeller arranged on the nacelle, and a yaw system, the yaw system is connected between the nacelle and the tower, and the vibration suppression step also includes: if the attenuation ratio of the vibration data within the first time period does not meet the preset requirements, controlling the yaw system to start so that the nacelle yaws relative to the tower.

[0009] According to one aspect of an embodiment of the present application, the information acquisition step also includes: obtaining the current wind direction of the wind turbine; controlling the start-up of the yaw system, specifically including: providing a database, the database including a mapping relationship between the wind speed and wind direction of the environment in which the wind turbine is located and the yaw angle of the cabin; retrieving the yaw angle corresponding to the current wind speed and wind direction of the wind turbine in the database, and controlling the yaw system to rotate the cabin to the yaw angle.

[0010] According to one aspect of an embodiment of the present application, the step of controlling the yaw system to perform cabin yaw, before providing a database, includes: establishing a database, controlling the start-up of the yaw system, and monitoring vibration data in real time, and if the vibration reduction ratio within a predetermined time meets preset requirements, recording the current wind speed and the yaw angle of the cabin under wind direction.

[0011] According to one aspect of an embodiment of the present application, the information acquisition step also includes: acquiring the wind direction of the environment in which the wind turbine generator set is located; the step of controlling the start-up of the yaw system includes: controlling the yaw system to rotate the impeller to face or back to the wind direction.

[0012] According to one aspect of an embodiment of the present application, the step of controlling the yaw system to rotate the impeller to face or away from the wind direction specifically includes: if the angle difference α between the wind direction and the windward direction of the impeller along the first clockwise direction satisfies: -30°≤α≤+30°, controlling the impeller to rotate to face the wind direction; if the angle difference α between the wind direction and the windward direction of the impeller along the first clockwise direction satisfies: +150°≤α≤+210°, controlling the impeller to rotate away from the wind direction; if the angle difference α between the wind direction and the windward direction of the impeller along the first clockwise direction satisfies: +30°<α<+150°, or, +210°<α<+330°, controlling the impeller to rotate to face or away from the wind direction.

[0013] According to one aspect of an embodiment of the present application, the control method also includes: if the vibration data exceeds a second preset range, controlling the movable part to remain in an unlocked state; if the vibration data is within the second preset range, controlling the movable part to switch from an unlocked state to a locked state, and the second preset range is within the first preset range; when the wind speed is less than the first threshold value, controlling the tower door to open.

[0014] According to one aspect of an embodiment of the present application, in the vibration suppression step, the first threshold is 6 m / s, and / or the first preset range is -0.1 g to 0.1 g.

[0015] The control method of a wind turbine generator set provided in an embodiment of the present application is applicable to a wind turbine generator set provided with a damping device. The control method includes an information acquisition step and a vibration suppression step. The control method uses wind speed as a closing condition for a tower door and uses vibration data as an unlocking condition for a movable part. Thus, the tower door and the start-up of the damping device can be self-controlled according to the wind speed of the environment in which the wind turbine generator set is located and the vibration information of the tower, so as to perform rapid response control and realize automatic anti-vortex vibration suppression. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0017] Figure 1 It is a structural schematic diagram of a wind turbine generator set according to an embodiment of the present application;

[0018] Figure 2 is a schematic structural diagram of a tower door according to an embodiment of the present application;

[0019] Figure 3 This is a structural schematic diagram of a movable part in a locked state in one embodiment of the present application;

[0020] Figure 4 is a schematic structural diagram of a movable part in an unlocked state according to an embodiment of the present application;

[0021] Figure 5 is a flow chart of a control method for a wind turbine generator set according to an embodiment of the present application;

[0022] Figure 6 This is a control logic diagram of a wind turbine generator set according to an embodiment of the present application;

[0023] Figure 7 is a control logic diagram of a wind turbine generator set according to another embodiment of the present application;

[0024] Figure 8 is a structural schematic diagram of another embodiment of the present application in which the movable part is in a locked state;

[0025] Fig. 9It is a structural schematic diagram of another embodiment of the present application in which the movable part is in an unlocked state.

[0026] In the attached figure:

[0027] 100-tower; 200-nacelle; 300-impeller; 400-yaw system; 500-solar cell;

[0028] 10-tower body; 20-tower door; 30-wind speed and direction sensor; 40-acceleration sensor;

[0029] 1-movable part; 11-oxygen generator; 12-air bag; 2-support platform; 3-elastic part; 4-locking part; 5-wind guide plate; 6-suspension platform; 7-wind collection component; 71-collecting part; 72-flow guide part.

[0030] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0031] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0032] The directional words appearing in the following description are all directions shown in the figure, and do not limit the control method of the wind turbine generator set of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0033] At present, vortex-induced vibration mainly occurs during tower hoisting and wind turbine shutdown and maintenance. The main countermeasures for wind turbines to deal with vortex-induced vibration are:

[0034] During the tower hoisting process, if vortex-induced vibration occurs, the hoisting operation will be stopped. After the vortex-induced vibration ends, check whether there is any damage inside the tower. After confirming that there is no problem, hoisting can be carried out. However, this response measure is not predictable and controllable, and is completely passive.

[0035] During the shutdown operation and maintenance process, if vortex-induced vibration occurs, workers need to go to the top of the tower and manually yaw to adjust the direction of the impeller to the wind. However, this countermeasure poses a great safety risk to the workers and can only be applied to onshore wind turbines, not floating wind turbines.

[0036] In order to solve the above problems, an embodiment of the present application provides a control method for a wind turbine generator set, which can automatically resist vortex vibration and suppress vibration during tower hoisting and shutdown operation and maintenance, thereby ensuring the safety of the wind turbine generator set throughout its entire life cycle.

[0037] See also Figures 1 to 5 In order to better understand the present invention, the control method of the wind turbine generator set in an embodiment of the present application is described below by taking a wind turbine generator set in an embodiment as an example.

[0038] Among them, the wind turbine generator set includes a tower 100 and a damping device, the tower 100 includes a tower body 10 and a tower door 20, the tower body 10 and the tower door 20 enclose a hollow cavity, the damping device is arranged in the hollow cavity and includes a supporting platform 2 and a movable part 1, the movable part 1 is elastically connected to the tower 100, the movable part 1 is arranged on the supporting platform 2 and can switch between a locked state and an unlocked state with the supporting platform 2.

[0039] in, Figure 3 This is a schematic diagram of the structure in which the movable part 1 in the embodiment of the present application is in a locked state. Figure 4 It is a structural schematic diagram of the movable part 1 in the embodiment of the present application in an unlocked state.

[0040] It is understandable that at least two groups of structures for suppressing vortex-induced vibration are formed in the wind turbine generator set. One group is the tower door 20. The specific principle is: when the tower door 20 is closed, due to the air flow and incompressibility of the air itself, the tower body 10 and the tower door 20 enclose a hollow cavity that can act as a damper, thereby reducing the vibration amplitude of the tower 100. The other group is a damping device. The specific principle is: when the movable part 1 is unlocked, when the tower 100 undergoes vortex-induced vibration, the movable part 1 can move relative to the support platform 2 to use the inertial force of the movable part 1 in the opposite direction to suppress the response amplitude of the vibration of the tower 100.

[0041] See also Figure 5In order to more reliably achieve vibration suppression of the tower 100, the control method of the wind turbine generator set in the embodiment of the present application includes:

[0042] Information acquisition step: acquiring wind speed of the environment in which the wind turbine generator set is located and vibration information of the tower 100;

[0043] In the vibration suppression step, when the wind speed is greater than a first threshold value and the vibration data exceeds a first preset range, the tower door 20 is controlled to be closed, and the movable part 1 and the supporting platform 2 are controlled to switch from a locked state to an unlocked state, so that the movable part 1 reciprocates relative to the supporting platform 2 in a direction away from or close to the tower 100.

[0044] The control method of the wind turbine generator set in the embodiment of the present application includes an information acquisition step and a vibration suppression step, wherein the wind speed can be used as the closing condition of the tower door 20, and the vibration data can be used as the unlocking condition of the movable part 1, so that the tower door 20 and the damping device can be started by the main control according to the wind speed of the environment in which the wind turbine generator set is located and the vibration information of the tower 100, so as to perform rapid response control and realize automatic anti-vortex vibration suppression.

[0045] Optionally, the wind turbine generator set may be provided with a wind speed and direction sensor 30 and an acceleration sensor 40 to obtain the wind speed of the environment in which the wind turbine generator set is located and the vibration information of the tower 100. According to the specific structure of the wind turbine generator set, the wind speed and direction sensor 30 may be arranged on the nacelle 200 or on the tower 100, and the acceleration sensor 40 may be arranged on the tower 100 or on the movable part 1, that is, the real-time information of the wind turbine generator set can be accurately collected.

[0046] It can be understood that the control method includes manual control and automatic control.

[0047] See also Figure 6 When manual control is adopted, the wind speed and vibration data can be detected in parallel. That is, the wind speed and vibration data can be detected in parallel in the vibration suppression step. When the wind speed is greater than the first threshold, the tower door 20 is manually closed. When the vibration data exceeds the first preset range, the movable part 1 and the support platform 2 are manually controlled to switch from the locked state to the unlocked state to suppress the vibration respectively.

[0048] See also Figure 7 When automatic control is adopted, in some optional embodiments, the vibration suppression step specifically includes:

[0049] When the wind speed is greater than the first threshold, the control tower door 20 is closed;

[0050] If the vibration data is within the first preset range, the movable part 1 is controlled to remain in a locked state. If the vibration data exceeds the first preset range, the movable part 1 and the supporting platform 2 are controlled to switch from a locked state to an unlocked state, so that the movable part 1 can reciprocate relative to the supporting platform 2 in a direction away from or close to the tower 100.

[0051] When automatic control is adopted, the wind speed and vibration data can be determined step by step, because when the wind speed is less than the first threshold, the tower 100 generally does not undergo vortex-induced vibration, and only when the wind speed is greater than the first threshold, that is, the wind speed is within the range of vortex-induced vibration, the tower 100 will undergo vortex-induced vibration. Therefore, when automatic control is adopted, the wind speed can be used as a prerequisite for judgment, that is, when the wind speed is greater than the first threshold, the vibration data is judged.

[0052] Then the vibration data of the tower 100 is detected. When the vibration data exceeds the first preset range, it means that closing the tower door 20 is not enough to meet the anti-vortex requirements of the wind turbine. Therefore, the movable part 1 and the support platform 2 can be controlled to switch from a locked state to an unlocked state to form an elastic damping structure to further suppress vibration. By adopting a step-by-step approach to suppress vibration and resist vortex, vibration reduction can be performed more effectively layer by layer, thereby improving the vibration suppression effect.

[0053] Optionally, when automatic control is adopted, the wind turbine generator set further includes a control system, and the tower door 20 can adopt any existing automatic door structure to realize automatic closing and opening of the tower door 20. The wind turbine generator set can be provided with a locking member 4, and the locking member 4 can realize the switching of the movable member 1 between the locked state and the unlocked state through an automatic latch structure or a magnetic attraction structure, so that when it is detected that the wind speed is greater than the first threshold value and the vibration data exceeds the first preset range, the control system can realize automatic control of the tower door 20 and the locking member 4 to the tower door 20 and the movable member 1.

[0054] In some optional embodiments, the first threshold of wind speed can be set to 6m / s. Since the tower 100 generally undergoes vortex-induced vibration when the wind speed is 6m / s to 10m / s, by setting the first threshold to 6m / s, it is possible to reduce the impact on the normal operation of the tower 100 while meeting the vibration suppression requirements. In addition, the first preset range of vibration data is set to -0.1g to 0.1g, that is, when the current vibration acceleration of the tower 100 is less than -0.1g or greater than 0.1g, it can be considered to exceed the first preset range, so that the unlocking of the movable part 1 can be controlled accordingly to ensure the automatic anti-vortex effect.

[0055] It should be noted that when the movable part 1 is unlocked, the movable part 1 can also be combined with other structures to achieve damping effect. The control method of the wind turbine generator set in the embodiment of the present application only limits the unlocking of the movable part 1, and is not limited to the use form of the damping device.

[0056] See also Figures 1 to 7 For the wind turbine generator set in the first embodiment of the present application, a vent is provided on the tower door 20, so the damping device can be arranged corresponding to the vent of the tower door. The damping device also includes an air guide plate 5, which is arranged at the vent. The air guide plate 5 can be rotatably connected to the door body. The movable part 1 has a degree of freedom of movement relative to the supporting platform 2. When the movable part 1 is in an unlocked state, it can drive the air guide plate 5 to rotate relative to the door body and adjust the frequency of the external airflow entering the hollow cavity from the vent.

[0057] Therefore, in addition to using the inertial force of the movable part 1 in the reverse direction to suppress the response amplitude of the vibration of the tower 100, the movable part 1 can also be combined with the air guide plate 5. The movable part 1 drives the air guide plate 5 to rotate relative to the door body to adjust the frequency of the external airflow entering the hollow cavity from the vent, thereby changing the excitation frequency of the vortex, so that the excitation frequency of the vortex forms a difference with the natural frequency of the tower 100, thereby suppressing the vortex-induced vibration and improving the reliability of the operation of the wind turbine generator set.

[0058] It can be understood that, since a relatively closed environment is formed in the wind turbine component after the tower door 20 is closed, in some optional embodiments, the movable part 1 includes an air bag 12 and an oxygen generator 11 disposed in the air bag 12, and the oxygen generator 11 is configured to generate oxygen during the movement of the movable part 1 relative to the supporting platform 2, and the vibration suppression step further includes:

[0059] When the oxygen pressure in the airbag 12 is greater than the second threshold, the oxygen is controlled to be released into the hollow cavity.

[0060] By arranging the oxygen generator 11 in the movable part 1, after the tower door 20 is closed, when the movable part 1 is unlocked, the movable part 1 can reciprocate relative to the supporting platform 2 to generate oxygen, and release it into the hollow cavity through the air bag 12 to supply the workers in the tower 100 with oxygen for breathing.

[0061] Optionally, a pressure relief hole or a pressure relief valve may be provided on the airbag 12, so that the generated oxygen can be first stored in the airbag 12, and when the pressure in the airbag 12 is greater than a certain value, the oxygen is released into the hollow cavity through the pressure relief hole or the pressure relief valve. By controlling the release of oxygen when the pressure in the airbag 12 is greater than the second threshold, a certain amount of oxygen can be released into the tower 100 to supply the breathing of the workers, and at the same time, the oxygen content in the tower 100 can be reasonably controlled to avoid excessive oxygen inside the tower 100 and improve safety.

[0062] Optionally, the second threshold value can be set to 0.5Mpa. When the oxygen pressure is greater than 0.5Mpa, the oxygen is controlled to be released into the hollow cavity through the pressure relief mechanism provided on the airbag 12 for the operator to breathe. When the oxygen pressure is less than 0.5Mpa, for example, between 0.3Mpa and 0.5Mpa, the oxygen can be stored in the airbag 12 for backup.

[0063] It is understandable that, during the shutdown operation and maintenance of the wind turbine, in addition to suppressing vibration by closing the tower door 20 and controlling the movable part 1 to unlock, automatic anti-vortex can also be achieved by controlling the yaw of the wind turbine.

[0064] See also Figures 1 to 7 In some optional embodiments, the wind turbine generator set further includes a nacelle 200, an impeller 300 disposed on the nacelle 200, and a yaw system 400, wherein the yaw system 400 is connected between the nacelle 200 and the tower 100, and the vibration suppression step further includes:

[0065] If the reduction ratio of the vibration data in the first time period does not meet the preset requirement, the yaw system 400 is controlled to start, so that the nacelle 200 yaws relative to the tower 100 .

[0066] That is, when performing vibration reduction, the tower door 20 can be closed and the movable part 1 can be controlled to be unlocked to reduce vibration. However, if the reduction ratio of the vibration data in the first time period does not meet the preset requirements, it means that only closing the tower door 20 and unlocking the movable part 1 are not enough to meet the anti-vortex requirements of the wind turbine. Therefore, the nacelle 200 can be yawed to further suppress vibration.

[0067] When the nacelle 200 yaws relative to the tower 100, the direction of the impeller 300 changes, so that the wind can be affected by the nacelle 200 and the blades of the impeller 300, and it is difficult to form a stable vortex that causes resonance of the tower 100, thereby achieving anti-vortex vibration suppression of the wind turbine.

[0068] Optionally, the wind turbine generator set may be provided with solar cells to realize power supply of the yaw system 400 , so as to control the yaw system 400 to realize the yaw of the nacelle 200 , so as to realize automatic anti-vortex.

[0069] It can be understood that the yaw of the nacelle 200 relative to the tower 100 can be performed in the following two ways.

[0070] See also Figure 1 and Figure 6 ,The first method is to use a database for intelligent yaw.

[0071] Specifically, the information acquisition step further includes: acquiring the current wind direction of the wind turbine generator set; and controlling the yaw system 400 to start, specifically including:

[0072] Providing a database, the database including a mapping relationship between the wind speed and wind direction of the environment in which the wind turbine generator set is located and the yaw angle of the nacelle 200;

[0073] The yaw angle corresponding to the current wind speed and wind direction of the wind turbine generator set is retrieved from the database, and the yaw system 400 is controlled to rotate the nacelle 200 to the yaw angle.

[0074] The database can be fitted with historical vibration suppression data or simulated using dynamic calculations. Different types of wind turbines can be equipped with different databases, so that the overall yaw angle control will be more precise to achieve better vibration reduction effects.

[0075] In some optional embodiments, the step of controlling the yaw system 400 to yaw the cabin 200, before providing a database, includes: establishing a database, controlling the yaw system 400 to start, and monitoring vibration data in real time, if the vibration reduction ratio within a predetermined time meets the preset requirements, recording the yaw angle of the cabin 200 under the current wind speed and wind direction.

[0076] Taking the database fitted with historical vibration suppression data as an example, before the database is formed, the historical vibration suppression data of the wind turbine can be used. That is, when vortex-induced vibration occurs, the current wind speed and wind direction can be recorded, and the angle at which the nacelle 200 yaws to stop the vibration can be recorded. Therefore, a database can be established based on the overall recorded data to achieve rapid adjustment in the later stage.

[0077] It is understandable that, based on the database, data analysis and feedback control can also be performed on the frequency and range of later vortex-induced vibrations, which in turn can adjust the first threshold of wind speed and the first preset range of vibration data to optimize the vibration suppression effect of the wind turbine.

[0078] See also Figure 1 and Figure 7 ,The second method is to automatically yaw according to wind direction.

[0079] Specifically, the information acquisition step also includes: acquiring the wind direction of the environment in which the wind turbine generator set is located; the step of controlling the yaw system 400 to start includes: controlling the yaw system 400 to rotate the impeller 300 to face or back to the wind direction.

[0080] In addition to more accurately realizing automatic anti-vortex through the database, it is also possible to quickly suppress vibration according to the wind direction of the current environment of the wind turbine. Compared with the automatic anti-vortex method through the database, the method of adjusting by wind direction is simpler and does not require the step of establishing a database in the early stage, and the response is faster.

[0081] In some optional embodiments, the step of controlling the yaw system 400 to rotate the impeller 300 to face or face away from the wind direction specifically includes: if the angle difference α between the wind direction and the windward direction of the impeller 300 along the first clockwise direction satisfies: -30°≤α≤+30°, controlling the impeller 300 to rotate to face the wind direction; if the angle difference α between the wind direction and the windward direction of the impeller 300 along the first clockwise direction satisfies: +150°≤α≤+210°, controlling the impeller 300 to rotate to face away from the wind direction; if the angle difference α between the wind direction and the windward direction of the impeller 300 along the first clockwise direction satisfies: +30°<α<+150°, or, +210°<α<+330°, controlling the impeller 300 to rotate to face or face away from the wind direction.

[0082] Among them, when the environmental wind direction is used for rapid vibration suppression, the angle between the current wind direction and the current windward direction of the impeller 300 can be calculated during yaw, and then the yaw of the cabin 200 can be controlled so that the cabin 200 can rotate along the shortest path until the impeller 300 thereon faces or faces away from the wind direction, thereby improving the vibration suppression efficiency.

[0083] It is understandable that after the vortex-induced vibration occurs in the tower 100, after the vibration is suppressed by the above operation, the vibration of the tower 100 will gradually weaken. Therefore, in some optional embodiments, the control method further includes:

[0084] If the vibration data exceeds the second preset range, the movable member 1 is controlled to remain in the unlocked state; if the vibration data is within the second preset range, the movable member 1 is controlled to switch from the unlocked state to the locked state, and the second preset range is within the first preset range;

[0085] When the wind speed is less than the first threshold, the tower door 20 is controlled to open.

[0086] Therefore, when the vibration gradually weakens, the wind turbine generator set can be restored in the reverse order of the vibration suppression step. The vibration data of the tower 100 can be detected first. When the vibration data is within the second preset range, it means that the vibration of the tower 100 has stopped. Therefore, the movable part 1 can be controlled to switch from the unlocked state to the locked state. Then the wind speed is detected. When the wind speed is less than the first threshold, the tower door 20 can be controlled to open to restore the normal operation of the tower 100.

[0087] It can be understood that the control method of the wind turbine generator set in the embodiment of the present application is not limited to being applied to the wind turbine generator set in the first embodiment, but can also be applied to other wind turbine generator sets having a tower door 20 and a damping device.

[0088] See also Figure 1 , Figure 8 and Fig. 9For the wind turbine generator set in the second embodiment of the present application, it also includes a tower body 10, a tower door 20 and a damping device. The tower body 10 and the tower door 20 enclose a hollow cavity. The damping device is arranged in the hollow cavity and includes a supporting platform 2 and a movable part 1. The movable part 1 is elastically connected to the tower through an elastic part 3. The movable part 1 is arranged on the supporting platform 2 and can switch between a locked state and an unlocked state with the supporting platform 2.

[0089] in, Figure 8 This is a schematic diagram of the structure in which the movable part 1 in the embodiment of the present application is in a locked state. Fig. 9 It is a structural schematic diagram of the movable part 1 in the embodiment of the present application in an unlocked state.

[0090] It can be understood that at least two groups of structures for suppressing vortex-induced vibration are also formed in the wind turbine generator set in the second embodiment. One group is the tower door 20. The specific principle is: when the tower door 20 is closed, due to the air flow and incompressibility of the air itself, the tower body 10 and the tower door 20 enclose a hollow cavity that can act as a damper, thereby reducing the vibration amplitude of the tower 100. The other group is a damping device. The specific principle is: when the movable part 1 is unlocked, when the tower 100 undergoes vortex-induced vibration, the movable part 1 can move relative to the support platform 2 to use the inertial force of the movable part 1 in the opposite direction to suppress the response amplitude of the vibration of the tower 100.

[0091] Therefore, the above-mentioned wind turbine generator set may also adopt the control method of the wind turbine generator set in the embodiment of the present application to suppress vibration.

[0092] Specifically, the wind speed can be used as the closing condition of the tower door 20, and the vibration data can be used as the unlocking condition of the movable part 1, so that the tower door 20 and the damping device can be started by the main control according to the wind speed of the environment in which the wind turbine generator set is located and the vibration information of the tower 100, so as to perform rapid response control and realize automatic anti-vortex vibration suppression.

[0093] That is, the wind turbine generator set in the embodiment of the present application can also adopt the method mentioned in the above embodiment to suppress vibration, and the same parts as the above will not be repeated here.

[0094] See also Figure 8 and Fig. 9 The difference between the second wind turbine generator set and the aforementioned one lies in the specific structure of the damping device. The wind turbine generator set includes a suspension platform 6, which is fixed to the tower 100, and the movable part 1 is suspended on the suspension platform 6 through an elastic part. A vent can be provided on the tower door 20, by providing a wind collecting component 7 at the vent of the door component.

[0095] Therefore, in the vibration suppression step, after the movable part 1 is controlled to be unlocked, the wind collecting component 7 can also collect the airflow outside the fan component through the collecting part 71, and guide the airflow collected by the collecting part 71 to the side where the movable part 1 is located through the guide part 72 to push the movable part 1 to swing relative to the suspension platform 6, thereby further increasing the swing amplitude of the movable part 1, improving the vibration suppression effect, and meeting the vibration suppression requirements of the high and flexible tower 100 of the wind turbine generator set in a strong wind environment.

[0096] It is understandable that, although the wind turbine generator sets in the above two embodiments have different structures, they can both be controlled by the control method of the wind turbine generator set in the embodiment of the present application. Moreover, the control method of the wind turbine generator set in the embodiment of the present application can be applied not only to the wind turbine generator sets in the above two embodiments, but also to wind turbine generator sets, which is not only applicable to onshore wind power generation, but also to offshore wind power generation, and has a very wide range of applications.

[0097] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A control method for a wind turbine generator set, wherein the wind turbine generator set comprises a tower and a damping device, wherein the tower comprises a tower body and a tower door, wherein the tower body and the tower door enclose a hollow cavity, wherein the damping device is arranged in the hollow cavity and comprises a supporting platform and a movable member, wherein the movable member is elastically connected to the tower, wherein the movable member is arranged on the supporting platform and can switch between a locked state and an unlocked state with the supporting platform, wherein: The control method comprises: An information acquisition step, acquiring wind speed of the environment in which the wind turbine generator set is located and vibration information of the tower; The vibration suppression step comprises: when the wind speed is greater than a first threshold value and the vibration data exceeds a first preset range, controlling the tower door to close, and controlling the movable part and the support platform to switch from a locked state to an unlocked state, so that the movable part reciprocates relative to the support platform in a direction away from or close to the tower.

2. The control method according to claim 1, characterized in that: The vibration suppression step specifically includes: When the wind speed is greater than a first threshold, controlling the tower door to close; If the vibration data is within a first preset range, the movable part is controlled to remain in a locked state; if the vibration data exceeds the first preset range, the movable part and the support platform are controlled to switch from a locked state to an unlocked state, so that the movable part reciprocates relative to the support platform in a direction away from or close to the tower.

3. The control method according to claim 1, characterized in that: The movable part includes an airbag and an oxygen generator disposed in the airbag, wherein the oxygen generator is configured to generate oxygen during the movement of the movable part relative to the support platform, and the vibration suppression step further includes: When the oxygen pressure in the airbag is greater than a second threshold, the oxygen is controlled to be released into the hollow cavity.

4. The control method according to claim 1, characterized in that: The wind turbine generator set further includes a nacelle, an impeller disposed on the nacelle, and a yaw system, wherein the yaw system is connected between the nacelle and the tower, and the vibration suppression step further includes: If the attenuation ratio of the vibration data in the first time period does not meet a preset requirement, the yaw system is controlled to start, so that the nacelle yaws relative to the tower.

5. The control method according to claim 4, characterized in that: The information acquisition step further includes: acquiring the current wind direction of the wind turbine generator set; The controlling the yaw system to start specifically includes: Providing a database, the database including a mapping relationship between the wind speed and wind direction of the environment in which the wind turbine generator set is located and the yaw angle of the nacelle; The yaw angle corresponding to the current wind speed and wind direction of the wind turbine generator set in the database is retrieved, and the yaw system is controlled to rotate the nacelle to the yaw angle.

6. The control method according to claim 5, characterized in that: The step of controlling the yaw system to perform the nacelle yaw, before providing the database, includes: A database is established to control the start-up of the yaw system and monitor the vibration data in real time. If the vibration reduction ratio meets the preset requirements within the predetermined time, the yaw angle of the cabin under the current wind speed and wind direction is recorded.

7. The control method according to claim 4, characterized in that: The information acquisition step further includes: acquiring the wind direction of the environment in which the wind turbine generator set is located; The step of controlling the yaw system to start up comprises: The yaw system is controlled to rotate the impeller to face or face away from the wind direction.

8. The control method according to claim 7, characterized in that: The step of controlling the yaw system to rotate the impeller to face or face away from the wind direction specifically includes: If the angle difference α between the wind direction and the windward direction of the impeller along the first clockwise direction satisfies: -30°≤α≤+30°, control the impeller to rotate to face the wind direction; If the angle difference α between the wind direction and the windward direction of the impeller along the first clockwise direction satisfies: +150°≤α≤+210°, control the impeller to rotate to face away from the wind direction; If the angular difference α between the wind direction and the windward direction of the impeller along the first clockwise direction satisfies: +30°<α<+150°, or +210°<α<+330°, the impeller is controlled to rotate to face or back to the wind direction.

9. The control method according to claim 1, characterized in that: The control method further comprises: If the vibration data exceeds a second preset range, the movable member is controlled to remain in an unlocked state; if the vibration data is within a second preset range, the movable member is controlled to switch from an unlocked state to a locked state, and the second preset range is within the first preset range; When the wind speed is less than a first threshold, the tower door is controlled to open.

10. The control method according to claim 1, characterized in that: In the vibration suppression step, the first threshold is 6 m / s, and / or the first preset range is -0.1 g to 0.1 g.

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