A wind turbine anti-vortex-induced vibration control method, system, medium and device

Abstract

The application discloses a wind turbine anti-vortex vibration control method, system, medium and equipment, the method is to meet the preset load of each component of the wind turbine as the condition, the angle of the variable pitch angle of the three blades of the wind turbine is determined, the variable pitch angle of the first blade determined at this time is the anti-vortex angle, the first blade is changed to the anti-vortex angle position through the control of the variable pitch angle, and the other two blades are in the pitch position, the soft limit position of the variable pitch is set by modifying the variable pitch parameter, so that the wind turbine is in the anti-vortex angle in the power-on working condition and the non-power-on working condition, and the formation of stable vortex is destroyed; the wind turbine can suppress the blade vortex vibration in the power-on state and the non-power-on state under all working conditions without adding additional hardware to the wind turbine, so that the blade damping is changed, and the resonance phenomenon is suppressed when the blade vibration frequency is close to the tower vibration frequency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind turbine anti-vortex-induced resonance, and particularly to a wind turbine anti-vortex-induced vibration control method, system, medium and equipment. BACKGROUND

[0002] When uniform fluid flows through a cylinder, alternating shedding vortices will be generated on the back flow surface, which is called Karman vortex-induced resonance. The alternating shedding vortices will produce regular lift excitation on the cylinder, and when the shedding frequency of the vortices coincides with the natural frequency of the tower, resonance will be excited. Therefore, the resonance phenomenon induced by Karman vortex street is called vortex-induced resonance, as shown in FIG. 1. Figure 1

[0003] Vortex-induced vibration of a wind turbine is the vibration of a tower excited by air vortex shedding on the leeward side of the tower. With the increasing large-scale of wind turbines, the increase in the height of the wind turbine tower and the decrease in the natural frequency of the wind turbine structure increase the risk of vortex-induced vibration of the wind turbine. When the vortex shedding frequency is close to the tower vibration frequency, due to resonance, the aerodynamic load will cause significant amplitude of the tower, thereby causing structural bearing risk. When the blades are in a non-power generation state, the cross sections of the blades are in a deep stall region at a large angle of attack, and due to the action of aerodynamic force, the first or second order of the pendulum aerodynamic damping is negative. At this time, the blades show self-excited vibration, the amplitude is obvious, and the load of the blades and part of the components of the unit is too high, which may cause damage to the unit.

[0004] In the prior art, the general treatment method for vortex-induced vibration before the wind turbine is hoisted and connected to the grid is to install a vortex strip or a net on the tower drum, but the cost is high. After the unit is connected to the grid and generates power, the yaw is adjusted to suppress the vortex-induced vibration of the wind turbine in the power-on state. However, there is no method that can ensure that the blade vortex-induced vibration is suppressed in all operating conditions of the unit in the power-on state and the non-power-on state.

[0005] In Chinese Invention Patent 202011166480.0, a method for suppressing vortex-induced vibration of a wind turbine is disclosed, which includes adjusting the pitch angle of the blades in the non-power-on state of the wind turbine with reference to the load range that the wind turbine can withstand. However, this anti-vortex method in the non-power-on state is prone to wind-induced blade vibration during strong wind, the actual pitch position of the blades after pitch adjustment is inconsistent with the stored pitch position before power failure, thereby causing the unit to vibrate or sweep the tower in the actual control. There is no adaptive detection function of the pitch angle of the unit before power-on to ensure the correctness of the pitch angle of the wind turbine and the safety of the wind turbine.

[0006] ​In Chinese invention patent application 202211262912.7, a method for eliminating vortex-induced vibration of a wind turbine is disclosed, which includes adding a control strategy of variable pitch vibration elimination and yaw vibration elimination in the PLC main control program to eliminate vortex-induced vibration, but this method cannot ensure that the wind turbine can suppress vortex-induced vibration of the wind turbine in the case of failure of the wind turbine variable pitch controller or power failure of the wind turbine, and cannot ensure the safety of the wind turbine under all working conditions. SUMMARY

[0007] The present application aims to overcome the shortcomings of the prior art and provides a wind turbine anti-vortex vibration control method, system, medium and equipment, which can suppress blade vortex-induced vibration of the wind turbine under all working conditions of power-on state and power-off state, thereby changing the blade damping and suppressing the occurrence of resonance phenomenon when the blade vibration frequency approaches the tower vibration frequency.

[0008] The present application is achieved by the following technical solution: a wind turbine anti-vortex vibration control method, which determines the angle of the variable pitch pitch angle of the three blades of the wind turbine under the condition of meeting the preset load of each component of the wind turbine, at this time the determined variable pitch pitch angle of the first blade is the anti-vortex angle, the first blade is pitched to the anti-vortex angle position through the control of the variable pitch pitch angle, and the other two blades are in the feathering position, and the soft limit position of the variable pitch is set by modifying the variable pitch parameters, so that the wind turbine is in the anti-vortex angle under the power-on working condition and the power-off working condition, and the formation of stable vortex is destroyed.

[0009] The wind turbine is executed in the power-on working condition after the power-off working condition, the proximity switch of the variable pitch is used for self-checking of the three variable pitch pitch angles, so that the actual variable pitch pitch angles of the wind turbine in the power-on working condition and the power-off working condition are consistent; if the wind turbine is stopped under the variable pitch pitch angle meeting the preset load condition in the power-on working condition of the wind turbine, and the wind speed, wind direction and vibration acceleration of the wind turbine are greater than the preset conditions in the main control of the wind turbine, the yaw is executed by the main control of the wind turbine to suppress the increase of vortex-induced vibration.

[0010] Further, the method comprises the following steps:

[0011] S1, under the condition of meeting the preset load of each component of the wind turbine, the angle of the variable pitch pitch angle of the three blades of the wind turbine is determined, at this time the determined variable pitch pitch angle of the first blade is the anti-vortex angle;

[0012] S2, the variable pitch parameters of the wind turbine are modified according to the variable pitch pitch angle obtained in step S1, so that the wind turbine is in the variable pitch pitch angle, the variable pitch soft limit can be triggered, and the variable pitch motor brake is put into operation; at the same time, the shutdown pitch angle of the wind turbine in normal standby state is set and the variable pitch pitch angle of the wind turbine in the power-on working condition or the power-off working condition of the wind turbine is calculated;

[0013] S3, make the wind turbine enter the first power-on starting condition, the blades two and three of the wind turbine are opened at the same time, until the two reach the anti-vortex angle of the blade one of the wind turbine, then the blades one, two and three are opened at the same time;

[0014] S4, adjust the proximity switch striker in the variable pitch process, so that the three blades can be detected at the preset angle.

[0015] S5, the wind turbine executes the power-on condition after the non-power-on condition, the variable pitch pitch angle of the three blades is at the preset angle, and the self-adaptive self-checking is performed, the proximity switch of each blade is detected, if the proximity switch of each blade is detected at the same time, the soft limit position is triggered and bypassed, then the three blades return to the normal standby shutdown pitch angle state, the wind turbine starts and is connected to the grid, if the proximity switch of one of the three blades cannot be detected, the wind turbine triggers a fault shutdown and executes step S6.

[0016] S6, trigger the maintenance mode in the main control of the wind turbine, so that the variable pitch pitch angle of the three blades triggers the variable pitch hard limit position, and then locks the impeller, personnel enters the hub for maintenance, after the maintenance is completed, the maintenance mode is manually exited, and the three blades return to the shutdown pitch angle determined in step S2.

[0017] S7, make the wind turbine in the power-on condition, if the wind turbine stops in the power-on condition, the wind turbine occurs vortex vibration, and the wind speed, wind direction and vibration acceleration of the wind turbine are greater than the preset conditions in the main control of the wind turbine, the main control of the wind turbine executes the yaw control.

[0018] Further, the step S1 comprises the following steps:

[0019] Under the condition that the preset load of each component of the wind turbine is met, the variable pitch pitch angle of the three blades of the wind turbine is determined (A1, A2, A3), wherein A1 is the variable pitch pitch angle of the blade one, A2 is the variable pitch pitch angle of the blade two, and A3 is the variable pitch pitch angle of the blade three, at this time, the variable pitch pitch angle A1 of the blade one is determined as the anti-vortex angle.

[0020] Further, the step S2 comprises the following steps:

[0021] According to the variable pitch pitch angle (A1, A2, A3) obtained in step S1, the variable pitch parameters of the wind turbine are modified, so that the variable pitch of the wind turbine at the variable pitch pitch angle (A1, A2, A3) can trigger the variable pitch soft limit and the variable pitch motor brake is put into operation.

[0022] The shutdown pitch angle of the normal standby of the wind turbine is set at the same time, and the variable pitch pitch angle of the wind turbine in the power-on condition or the variable pitch pitch angle of the wind turbine in the non-power-on condition is calculated, the formula is as follows:

[0023] S d = S E -0.1;

[0024] wherein, S d is the shutdown pitch angle of the wind turbine in normal standby state, i.e. the pitch angle of the pitch (A1, A2, A3), S E is the pitch angle of the pitch safety chain in the power-on state of the wind turbine or the pitch angle of the pitch in the non-power-on state of the wind turbine.

[0025] Further, the step S4 comprises the following steps:

[0026] Adjusting the 86° proximity switch striker in the pitch process, so that the proximity switch of each of the three blades can be detected when the three blades are in the position of 86° pitch.

[0027] Further, the step S5 comprises the following steps:

[0028] After the wind turbine executes the power-on state after the non-power-on state, the pitch angle of the three blades is 86°, and the self-adaptive self-checking is performed. The pitch angle of the wind turbine changes from the shutdown pitch angle in the standby state to the pitch safety chain angle. After the main control issues the pitch bypass instruction, the blade passes through the soft limit position and performs self-checking until the set 86°. The proximity switch of each of the three blades is detected. If the proximity switch of each of the three blades is detected at the same time, the blade triggers the soft limit position, and the main control automatically performs the pitch bypass. After that, the three blades return to the shutdown pitch angle state in the normal standby state, the wind turbine is started and connected to the grid. If the proximity switch of one of the three blades cannot be detected, and the self-checking time exceeds the preset time, the wind turbine triggers the fault shutdown, and step S6 is executed.

[0029] Further, the step S6 comprises the following steps:

[0030] In the state that the wind turbine is stopped and the preset wind condition is met, the maintenance mode in the main control PLC of the wind turbine is triggered, so that the pitch angle of the three blades triggers the pitch hard limit position, and the impeller is locked. Personnel enter the hub for maintenance. After the maintenance is completed, the maintenance mode is manually exited, and the three blades return to the shutdown pitch angle determined in step S2.

[0031] A wind turbine anti-vortex vibration control system for implementing the wind turbine anti-vortex vibration control method described above, comprising:

[0032] A pitch angle acquisition module, which determines the angle of the pitch angle of the three blades of the wind turbine under the condition that the preset load of each component of the wind turbine is met;

[0033] A shutdown pitch angle calculation module, which calculates the shutdown pitch angle of the wind turbine in normal standby state according to the pitch angle.

[0034] The proximity switch adjustment module adjusts the proximity switch bump block in the variable pitch process, so that the proximity switches of the three blades can be detected when the three blades are at 86 degrees, respectively.

[0035] The self-adaptive checking module is used for executing the power-on working condition after the non-power-on working condition of the wind turbine, so that the actual variable pitch angle of the wind turbine in the non-power-on working condition and the power-on working condition is consistent.

[0036] The main control module is used for controlling the start and stop of the wind turbine, the variable pitch angle and the yaw to the wind.

[0037] A non-transitory computer readable medium storing instructions, wherein when the instructions are executed by a processor, the steps of the wind turbine anti-vortex vibration control method are performed.

[0038] A computing device comprising a processor and a memory for storing processor-executable programs, wherein when the processor executes the programs stored in the memory, the wind turbine anti-vortex vibration control method is implemented.

[0039] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0040] 1. The present application can realize the pitch-to-soft-limit position of the wind turbine under the non-power-on working condition, suppress the vortex-induced vibration of the wind turbine, and perform the variable pitch angle self-adaptive checking when the wind turbine is started for the first time after power-off, so as to ensure the correctness and safety of the wind turbine angle.

[0041] 2. The present application can realize the soft limit triggering of the wind turbine under the power-on working condition and at the normal standby angle, so as to make the variable pitch motor brake enter, and then realize the non-easy blowing of the blades, and ensure the safety of the blades.

[0042] 3. The present application can realize the pitch-to-soft-limit of the wind turbine blades under the power-on working condition, the safety chain disconnection or the variable pitch EFC disconnection, so as to make the variable pitch motor brake enter.

[0043] 4. The present application can realize the yaw control to suppress the vortex-induced vibration of the wind turbine under the power-on working condition.

[0044] 5. The present application does not need to increase additional hardware for the wind turbine, but only needs to modify the variable pitch parameters and update the main control program, so as to achieve the anti-vortex purpose, and is easy to promote on site. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 The principle diagram of vortex-induced resonance.

[0046] Figure 2The blade pitch angle broken line chart for the wind turbine entering the first power-on starting condition.

[0047] Figure 3 The blade pitch angle broken line chart for the self-adaptive self-checking state.

[0048] Figure 4 The grid connection flow chart for the wind turbine in the non-power-on and power-on starting conditions.

[0049] Figure 5 The work flow chart for the wind turbine in the maintenance mode.

[0050] Figure 6 The work flow chart for the wind turbine in the yaw-to-wind execution. DETAILED DESCRIPTION

[0051] The application will be further described in connection with specific embodiments.

[0052] Embodiment 1

[0053] The wind turbine anti-vortex vibration control method provided in the embodiment is to determine the angles of the variable pitch angles of the three blades of the wind turbine under the condition of meeting the preset load of each component of the wind turbine, at this time, the variable pitch angle of the first blade determined is the anti-vortex angle, the first blade is pitched to the anti-vortex angle position through the control of the variable pitch angle, and the other two blades are in the feathering position, the soft limit position of the variable pitch is set by modifying the variable pitch parameter, so that the wind turbine is in the anti-vortex angle in the power-on condition and the non-power-on condition, and the formation of stable vortex is destroyed; the wind turbine executes the power-on condition after the non-power-on condition, the proximity switch of the variable pitch is used to self-check the three variable pitch angles, so that the actual variable pitch angles of the wind turbine in the non-power-on condition and the power-on condition are consistent; if the wind turbine stops under the variable pitch angle meeting the preset load condition in the power-on condition of the wind turbine, and the wind speed, wind direction and vibration acceleration of the wind turbine are greater than the preset conditions in the main control of the wind turbine, the wind turbine executes the yaw-to-wind to suppress the increase of vortex vibration.

[0054] The method comprises the following steps:

[0055] S1, under the condition of meeting the preset load of each component of the wind turbine, the angles of the variable pitch angles of the three blades of the wind turbine are determined, at this time, the variable pitch angle of the first blade determined is the anti-vortex angle, comprising the following steps:

[0056] Under the condition of meeting preset loads of each component of the wind turbine, angles of the pitch angles of the three blades of the wind turbine are determined (69.9°, 88.9°, 88.9°), wherein the pitch angle of the first blade is 69.9°, the pitch angle of the second blade is 88.9°, and the pitch angle of the third blade is 88.9°, and the pitch angle of the first blade 69.9° determined at this time is the anti-vortex angle.

[0057] S2, modifying the pitch parameters of the wind turbine according to the pitch angles obtained in step S1, so that the wind turbine is in a state in which the pitch can trigger the pitch soft limit and the pitch motor brake is put into operation; at the same time, setting the shutdown pitch angle of the wind turbine in normal standby and calculating the pitch angle of the wind turbine in the power-on working condition or the pitch angle of the wind turbine in the power-off working condition, including the following steps:

[0058] According to the pitch angles (69.9°, 88.9°, 88.9°) obtained in step S1, the pitch parameters of the wind turbine are modified, so that the wind turbine is in a state in which the pitch can trigger the pitch soft limit and the pitch motor brake is put into operation;

[0059] At the same time, the pitch angle of the wind turbine in the power-on working condition or the pitch angle of the wind turbine in the power-off working condition is calculated, and the formula is as follows:

[0060] S d =S E -0.1;

[0061] Wherein, S d is the shutdown pitch angle (69.9°, 88.9°, 88.9°) of the wind turbine in normal standby, and S E is the pitch angle of the wind turbine in the power-on working condition or the pitch angle of the wind turbine in the power-off working condition, i.e. (70°, 89°, 89°).

[0062] S3, referring to Figure 2 , the wind turbine is put into the first power-on starting condition, the second blade and the third blade of the wind turbine are simultaneously pitched, and after the two blades reach the anti-vortex angle 69.9° of the first blade of the wind turbine, the first blade, the second blade and the third blade are simultaneously pitched;

[0063] S4, adjusting the 86° proximity switch striker in the pitch process, so that the proximity switches of the three blades can be detected when the three blades are in the pitch position of 86°;

[0064] S5, referring to Figures 3-4As shown, the wind turbine executes the power-on working condition after the non-power-on working condition, the adaptive self-checking is performed when the pitch angle of the three blades is 86°, the pitch angle of the wind turbine changes from the shutdown pitch angle at the standby angle to the safety chain pitch angle, after the main control sends the pitch bypass command, the blades pass through the soft limit position until the set 86° for self-checking, and the proximity switches of the three blades are detected; if the proximity switches of the three blades are detected at the same time, the blades trigger the soft limit position, and after the main control automatically performs the pitch bypass, the three blades return to the normal standby shutdown pitch angle state, and the wind turbine starts and is connected to the grid; wherein, the pitch angle change process of each blade is as follows:

[0065] Blade one: 69.9°-70°-86°-70°-69.9°

[0066] Blade two: 88.9°-89°-86°-89°-88.9°

[0067] Blade three: 88.9°-89°-86°-89°-88.9°.

[0068] If one of the three blades cannot detect the proximity switch, and the self-checking time exceeds the preset time, the wind turbine triggers a fault shutdown, and executes step S6;

[0069] S6, see Figure 5 As shown, in the state that the wind turbine is shutdown and meets the preset wind condition, the maintenance mode in the main control PLC of the wind turbine is triggered, the pitch angle of the three blades triggers the pitch hard limit position, and then the impeller is locked, personnel enter the hub for maintenance, after the maintenance is completed, the maintenance mode is manually exited, and the three blades return to the shutdown pitch angle determined in step S2; wherein, the pitch angle change process of each blade after entering the maintenance mode is as follows:

[0070] Blade one: 69.9°-70°-91°

[0071] Blade two: 88.9°-89°-91°

[0072] Blade three: 88.9°-89°-91°.

[0073] The pitch angle change process of each blade after exiting the maintenance mode is as follows:

[0074] Blade one: 91°-70°-69.9°

[0075] Blade two: 91°-89°-88.9°

[0076] Blade three: 91°-89°-88.9°.

[0077] S7, see Figure 6The wind turbine is in a power-on working condition, if the wind turbine stops in the power-on working condition, vortex-induced vibration occurs in the wind turbine, and the wind speed, wind direction and vibration acceleration of the wind turbine are greater than the preset conditions in the main control of the wind turbine, then the main control of the wind turbine executes yaw control.

[0078] Embodiment 2

[0079] The embodiment discloses a wind turbine anti-vortex-induced vibration control system for implementing the wind turbine anti-vortex-induced vibration control method in embodiment 1, comprising:

[0080] A pitch angle acquisition module is configured to determine the angle of the pitch angle of the three blades of the wind turbine under the condition that the preset load of each component of the wind turbine is met.

[0081] A shutdown pitch angle calculation module is configured to calculate the shutdown pitch angle of the wind turbine in normal standby according to the pitch angle.

[0082] A proximity switch adjustment module is configured to adjust the proximity switch striker block in the pitch process, so that the proximity switches of the three blades can be detected when the three blades are at 86°.

[0083] An adaptive verification module is configured to execute the power-on working condition after the non-power-on working condition of the wind turbine, so that the actual pitch angle of the wind turbine in the power-on working condition and the non-power-on working condition is consistent.

[0084] A main control module is configured to control the start and stop of the wind turbine, the pitch angle and the yaw control.

[0085] Embodiment 3

[0086] The embodiment discloses a non-transitory computer readable medium storing instructions, when the instructions are executed by a processor, the steps of the wind turbine anti-vortex-induced vibration control method according to embodiment 1 are executed.

[0087] The non-transitory computer readable medium in the embodiment can be a disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), a U disk, a mobile hard disk and the like.

[0088] Embodiment 4

[0089] The embodiment discloses a computing device comprising a processor and a memory for storing a processor executable program, when the processor executes the program stored in the memory, the wind turbine anti-vortex-induced vibration control method in embodiment 1 is implemented.

[0090] The computing device described in this embodiment can be a desktop computer, a notebook computer, a smart phone, a PDA handheld terminal, a tablet computer, a programmable logic controller (PLC), or other terminal device with processor function.

[0091] The above-described embodiments are only preferred embodiments of the present application, and are not intended to limit the scope of the present application. Any changes made in the shape or principle of the present application should be covered within the scope of the present application.

Claims

1. A method for controlling vortex-induced vibration of a wind turbine, characterized by: The method is to determine the variable pitch angles of the three blades of the wind turbine generator set under the condition of meeting the preset loads of various components of the wind turbine generator set. At this time, the variable pitch angle of blade one is determined to be the anti-vortex excitation angle. The blade one is pitched to the anti-vortex excitation angle position by controlling the variable pitch angle, and the other two blades are in the feathering position. Then, the soft limit position of the variable pitch is set by modifying the pitch parameter, so that the wind turbine generator set is at the anti-vortex excitation angle in both the power-on and non-power-on working conditions, thereby destroying the formation of stable vortices. The wind turbine is made to perform power-on operation after the non-power-on operation, and the three pitch angles are self-calibrated using the proximity switch of the variable pitch to make the actual pitch angles of the wind turbine in the non-power-on and power-on conditions consistent; If the wind turbine is powered on and the wind turbine is shut down at a variable pitch angle that meets the preset load conditions, and the wind speed, wind direction and vibration acceleration of the wind turbine are greater than the conditions preset in the wind turbine main control, the wind turbine main control will execute yaw to the wind to suppress the increase of vortex-induced vibration; The method comprises the following steps: S1. Under the condition that the preset loads of various components of the wind turbine are met, determine the variable pitch angles of the three blades of the wind turbine. The variable pitch angle of blade one determined at this time is the anti-vortex angle; S2. Modify the wind turbine pitch parameters according to the pitch angle obtained in step S1, so that the wind turbine can trigger the pitch soft limit when the pitch is at the pitch angle, and the pitch motor brake is engaged; at the same time, set the normal standby shutdown pitch angle of the wind turbine and calculate the pitch safety chain when the wind turbine is powered on or the pitch angle when the wind turbine is not powered on; S3, the wind turbine enters the first power-on startup condition, and blades 2 and 3 of the wind turbine are simultaneously opened until they reach the anti-vortex induction angle of blade 1 of the wind turbine, and then blades 1, 2, and 3 are opened together; S4. Adjust the proximity switch bumper during the pitch change process so that the proximity switches of the three blades can be detected when the three blades are at the preset angles. S5. The wind turbine generator set performs a power-on operation after a non-power-on operation. When the variable pitch angles of the three blades are at a preset angle, an adaptive self-test is performed to detect the proximity switches of the three blades. If the three blades simultaneously detect their respective proximity switches, the soft limit position is triggered and the three blades are automatically bypassed. The three blades then return to the normal standby shutdown pitch angle state, and the wind turbine generator set is started and connected to the grid. If the proximity switch cannot be detected by one of the three blades, the wind turbine generator set triggers a fault shutdown and the execution proceeds to step S6. S6. Trigger the maintenance mode in the wind turbine main control unit, so that the variable pitch angles of the three blades trigger the variable pitch hard limit position, thereby locking the impeller. A person enters the hub for maintenance. After the maintenance is completed, the maintenance mode is manually exited, and the three blades return to the shutdown pitch angle determined in step S2. S7. Put the wind turbine generator set into a power-on condition. If the wind turbine generator set is shut down under the power-on condition, the wind turbine generator set generates vortex-induced vibration, and the wind speed, wind direction and vibration acceleration of the wind turbine generator set are greater than the conditions preset in the main control of the wind turbine generator set, the main control of the wind turbine generator set performs yaw wind control.

2. A wind turbine anti-vortex induced vibration control method according to claim 1, characterized in that: The step S1 comprises the following steps: Under the condition that the preset loads of various components of the wind turbine are met, the variable pitch angles (A1, A2, A3) of the three blades of the wind turbine are determined, where A1 is the variable pitch angle of blade one, A2 is the variable pitch angle of blade two, and A3 is the variable pitch angle of blade three. The variable pitch angle A1 of blade one determined at this time is the anti-vortex angle.

3. A wind turbine anti-vortex induced vibration control method according to claim 2, characterized in that: The step S2 comprises the following steps: According to the pitch angle (A1, A2, A3) obtained in step S1, the pitch parameters of the wind turbine are modified so that the wind turbine can trigger the pitch soft limit when the pitch angle (A1, A2, A3) is set, and the pitch motor brake is engaged; At the same time, the wind turbine's normal standby pitch angle is set and the pitch safety chain is broken when the wind turbine is powered on or the pitch angle when the wind turbine is not powered on is calculated. The formula is as follows: S d =S E -0.1; Among them, S d is the normal standby pitch angle of the wind turbine, that is, the variable pitch angle (A1, A2, A3), S E It is the pitch angle when the wind turbine is powered on or the blade safety chain is broken.

4. A wind turbine anti-vortex induced vibration control method according to claim 1, characterized in that: The step S4 comprises the following steps: Adjust the 86° proximity switch bumper during the pitch change process so that the proximity switches of the three blades can be detected separately when the three blades are in the 86° pitch change position.

5. A wind turbine anti-vortex induced vibration control method according to claim 4, characterized in that: The step S5 comprises the following steps: The wind turbine performs the power-on condition after the non-power-on condition, and performs an adaptive self-test when the pitch angles of the three blades are at 86°. The pitch angle of the wind turbine changes from the parking pitch angle under the standby angle to the safety chain-breaking pitch angle. After the main control issues a pitch bypass command, the blade passes through the soft limit position until it reaches the set 86° for self-test, detecting the proximity switches of the three blades. If all three blades detect their respective proximity switches at the same time, then once the blade triggers the soft limit position and the main control automatically performs pitch bypass, the three blades return to the normal standby parking pitch angle state, and the wind turbine is started and connected to the grid. If one of the three blades cannot detect the proximity switch and the self-test time exceeds the preset time, the wind turbine triggers a fault shutdown and executes step S6.

6. A wind turbine anti-vortex induced vibration control method according to claim 1, characterized in that: The step S6 comprises the following steps: When the wind turbine is shut down and the preset wind conditions are met, the maintenance mode in the wind turbine master PLC is triggered, so that the variable pitch angles of the three blades trigger the variable pitch hard limit position, thereby locking the impeller, and personnel enter the hub for maintenance. After the maintenance is completed, the maintenance mode is manually exited, so that the three blades return to the shutdown pitch angle determined in step S2.

7. A wind turbine anti-vortex-induced vibration control system, characterized in that: A method for controlling wind turbine anti-vortex-induced vibration according to any one of claims 1 to 6, comprising: The variable pitch angle acquisition module determines the variable pitch angles of the three blades of the wind turbine under the condition that the preset loads of the various components of the wind turbine are met; A shutdown pitch angle calculation module calculates the shutdown pitch angle of the wind turbine in normal standby mode based on the variable pitch angle; The proximity switch adjustment module adjusts the proximity switch bumper during the pitch change process so that the proximity switches of the three blades can be detected separately when the three blades are at 86°. An adaptive calibration module is used for the wind turbine to perform a power-on operation after the wind turbine is in a non-powered operation, so that the actual variable pitch angles of the wind turbine in the non-powered and powered operation conditions are consistent; The main control module is used to control the start and stop of the wind turbine, the pitch angle and the yaw direction to the wind.

8. A non-transitory computer-readable medium storing instructions, characterized in that: When the instruction is executed by the processor, the steps of the wind turbine anti-vortex-induced vibration control method according to any one of claims 1 to 6 are performed.

9. A computing device comprising a processor and a memory for storing a program executable by the processor, characterized in that: When the processor executes the program stored in the memory, the wind turbine anti-vortex-induced vibration control method according to any one of claims 1 to 6 is implemented.

Images