A wind-driven generator-based high-wind maintenance control system and method

Abstract

The present application discloses a wind-driven generator-based high-wind maintenance control system and method, which relates to the technical field of wind power generation, and the system comprises: a yaw module, comprising two yaw motor groups, the number of yaw motors in the two yaw motor groups being the same; a collection module, used to collect current wind data and wind generator operation data; an analysis module, connected to the collection module, used to analyze whether the nacelle of the wind generator is in a high-wind yaw state in combination with the current wind data and the operation data; a control module, respectively connected to the analysis module and the yaw module; when the analysis module analyzes that the nacelle is not in a high-wind yaw state, the control module controls the yaw reduction boxes of the two yaw motors to mesh with the yaw gear rings, and controls the two yaw motors to output torques in different directions, respectively, so that the gears of the yaw reduction boxes fit the yaw gear rings. The present application has the effect that the yaw gear rings and yaw motors are not easily damaged by collision in high wind conditions.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and in particular to a high wind maintenance control system and method based on a wind turbine. Background Art

[0002] Wind turbines, like hydraulic machinery, have played an important role in the development of productivity as a power source to replace human and animal power. The principle of wind power generation is to use wind power to drive the blades to rotate, and then increase the speed of rotation through a speed increaser to drive the generator to generate electricity.

[0003] Since the wind direction is constantly changing, in order to make the wind turbine have a higher wind power conversion efficiency, the wind turbine can automatically correct the deviation through the yaw system so that the blades connected to the nacelle can continue to be in a wind-facing state. In the related art, the yaw device usually includes a yaw gear ring and a yaw motor arranged at the bottom of the nacelle, and the yaw reduction box of the yaw motor is meshed with the yaw gear ring. When the nacelle and the blades are yawed, the yaw motor can be started to drive the yaw gear ring to rotate, and then drive the nacelle and the blades to rotate to achieve wind facing. After the wind facing is completed, the yaw motor can be locked so that the yaw gear is restricted from rotating, thereby maintaining the blades facing the wind.

[0004] With respect to the above-mentioned related technologies, the inventor believes that there are the following defects: due to the large tooth clearance of the yaw gear ring, even if the reduction gear of the yaw reduction box is meshed with the yaw gear ring, there is still a tooth clearance between the reduction gear and the yaw gear ring. At this time, in the case of strong winds, the nacelle is driven and rotated by the wind, generating a large load. Due to the tooth clearance between the reduction gear and the yaw gear ring, the yaw gear ring will have a strong rigid collision with the yaw motor, which is easy to cause damage to the yaw gear ring or the yaw motor. Summary of the invention

[0005] In order to improve the defect that when the cabin load is large due to strong winds, the yaw gear ring and the yaw motor are prone to strong rigid collision, causing damage to the yaw gear ring or the yaw motor, the present application provides a strong wind holding control system and method based on a wind turbine.

[0006] In a first aspect, the present application provides a high wind maintenance control system based on a wind turbine, the system comprising:

[0007] A yaw module, comprising two yaw motor groups, wherein the two yaw motor groups have the same number of yaw motors;

[0008] A collection module is used to collect current wind data and wind turbine operation data;

[0009] An analysis module, connected to the acquisition module, for analyzing whether the nacelle of the wind turbine is in a high wind yaw state in combination with the current wind data and the operation data;

[0010] A control module, connected to the analysis module and the yaw module respectively;

[0011] The nacelle is provided with a yaw ring gear meshing with all the yaw motors, the yaw ring gear is coaxial with the nacelle and the two rotate synchronously, and when the analysis module analyzes that the nacelle is not in the high-wind yaw state, the control module controls the two groups of yaw motors to output torque in different directions respectively, so that the gears of the yaw reduction box fit the yaw ring gear.

[0012] By adopting the above technical scheme, after the acquisition module acquires the current wind data and the operating data of the wind turbine, the analysis module analyzes whether the nacelle of the wind turbine is in a strong wind yaw state according to the data acquired by the acquisition module. If it is in a strong wind yaw state, the two groups of yaw motors are controlled to output torque in different directions respectively, so that the gears of the yaw reduction box fit the yaw gear ring. At this time, the gears of the yaw reduction box and the yaw gear ring are pressed against each other, and there is no tooth gap between the gears of the yaw reduction box and the yaw gear ring. If strong winds occur, the force exerted by the wind on the blades and the nacelle will be partially offset by the torque output by the yaw motor, and the yaw motor and the yaw gear ring will not collide, thereby extending the service life of the yaw motor and the yaw gear ring.

[0013] Optionally, the current wind force data includes current wind direction data and current wind force level, and the analysis module includes:

[0014] an analysis unit, connected to the acquisition module, for analyzing the current wind direction data and the operation data to obtain the yaw angle of the nacelle;

[0015] A first judgment unit, which is preset with an angle threshold and is connected to the analysis unit, and is used to judge whether the yaw angle exceeds the angle threshold;

[0016] A second judgment unit is preset with a wind force level threshold and is connected to the first judgment unit and the acquisition module respectively;

[0017] When the first judgment unit judges that the yaw angle exceeds the angle threshold, the second judgment unit is used to judge whether the current wind force level exceeds the wind force level threshold and form a first judgment result;

[0018] If the current wind force level does not exceed the wind force level threshold, the first judgment result is that the nacelle is not in a high-wind yaw state;

[0019] If the current wind force level exceeds the wind force level threshold, the first judgment result is that the nacelle is in the high-wind yaw state.

[0020] By adopting the above technical solution, the yaw angle of the cabin is first analyzed by the analysis unit, and then the first judgment unit combines the yaw angle and the preset angle threshold to preliminarily judge whether the cabin is in a yaw state; if the first judgment unit judges that the yaw angle exceeds the angle threshold, the second judgment unit combines the current wind force level and the preset wind force level threshold to further judge whether the cabin is in a high wind yaw state.

[0021] Optionally, the analysis module further includes:

[0022] A delay unit, which is preset with a delay time and is connected to the first judgment unit and the second judgment unit respectively, wherein the delay time includes a first delay time and a second delay time, and the first delay time is less than the second delay time;

[0023] When the first judgment unit judges that the yaw angle exceeds the angle threshold, the delay unit counts a first statistical time when the yaw angle exceeds the angle threshold, and when the first statistical time exceeds the first delay time, the second judgment unit judges whether the current wind force level exceeds the wind force level threshold;

[0024] When the second judgment unit judges that the current wind force level exceeds the wind force level threshold, the delay unit counts the second statistical time that the current wind force level exceeds the wind force level threshold, and when the second statistical time exceeds the second delay time, the second judgment unit obtains the judgment result that the cabin is in the strong wind yaw state.

[0025] By adopting the above technical solution, since the yaw angle and the current wind force level are both easily volatile data, when the yaw angle is at the edge of the angle threshold or the current wind force level is at the edge of the wind level threshold, it is easy for the data to repeatedly exceed the threshold in a short period of time due to data fluctuations, ultimately leading to multiple erroneous judgment results. Therefore, the preset delay time can effectively avoid judgment errors caused by data fluctuations.

[0026] Optionally, the yaw module includes at least three yaw motors, and the yaw module further includes:

[0027] An information acquisition unit, used to acquire motor information of all the yaw motors, wherein the motor information includes an installation position;

[0028] a calculation unit connected to the information acquisition unit, and configured to calculate the straight-line distances between all the yaw motors and the blades of the wind turbine according to the installation positions;

[0029] a marking unit connected to the calculation unit, and used to mark different numbers for all the yaw motors according to the straight-line distances, wherein the larger the straight-line distance, the smaller the number of the corresponding yaw motor;

[0030] A grouping unit is connected to the marking unit and is used to group a preset number of yaw motors into spare motor groups, and randomly group all the remaining yaw motors into two yaw motor groups with the same number.

[0031] By adopting the above technical solution, since the blades of the wind turbine have a certain weight, the moment of inertia of one side of the blade is greater during the rotation of the nacelle connected to the blade. The greater the moment of inertia, the greater the rotational torque. Therefore, after the installation position of the yaw motor is obtained by the information acquisition unit, the calculation unit calculates the distance between the yaw motor and the blade. Finally, the yaw motor far away from the blade is preferentially allocated to the yaw motor group through the grouping unit and the marking unit, while the yaw motor close to the blade is divided into a spare motor group as an alternative. Marking and numbering the yaw motors is conducive to the management of all yaw motors.

[0032] Optionally, the motor information also includes a total operation time, and the yaw module also includes:

[0033] a monitoring unit, which is preset with a time threshold and is connected to the signal acquisition unit and the grouping unit respectively, and is used to determine whether the total operation time of each yaw motor in the yaw motor group exceeds the time threshold; if the total operation time exceeds the time threshold, the corresponding yaw motor is marked as a target yaw motor;

[0034] A replacement unit is connected to the monitoring unit and the grouping unit respectively, and is used to replace the target yaw motor in the yaw motor group with the yaw motor in the spare motor group.

[0035] By adopting the above technical solution, the monitoring unit can determine whether the total operation time of the yaw motor is too long through a preset time threshold. If it is too long, the target yaw motor that is too long can be replaced with the yaw motor in the spare motor group through the replacement unit, thereby avoiding safety problems caused by aging parts of the yaw motor in use as much as possible.

[0036] In a second aspect, the present application provides a high wind control method based on a wind turbine, comprising the following steps:

[0037] Collect current wind data and wind turbine operation data;

[0038] Analyzing whether the nacelle of the wind turbine is in a high wind yaw state in combination with the current wind data and the operation data;

[0039] If the cabin is not in the high-wind yaw state, all the yaw motors in the two yaw motor groups in the yaw module are controlled to output torque in different directions respectively, so that the gears of the yaw reduction box fit the yaw gear ring, the yaw gear ring rotates coaxially and synchronously with the cabin, and the number of yaw motors in the two yaw motor groups is the same.

[0040] By adopting the above technical scheme, after collecting the current wind data and the operating data of the wind turbine, it is analyzed whether the cabin of the wind turbine is in a strong wind yaw state according to the data collected by the collection module. If it is in a strong wind yaw state, the two groups of yaw motors can be controlled to output torque in different directions respectively, so that the gears of the yaw reduction box fit the yaw gear ring. At this time, the gears of the yaw reduction box and the yaw gear ring are pressed against each other, and there is no tooth gap between the gears of the yaw reduction box and the yaw gear ring. If strong winds occur, the force exerted by the wind on the blades and the cabin will be partially offset by the torque output by the yaw motor, and the yaw motor and the yaw gear ring will not collide, thereby extending the service life of the yaw motor and the yaw gear ring.

[0041] Optionally, the current wind force data includes current wind direction data and current wind force level, and the analyzing whether the nacelle of the wind turbine is in a high wind yaw state by combining the current wind force data and the operation data includes the following steps:

[0042] Analyze the current wind direction data and the operation data to obtain the yaw angle of the nacelle;

[0043] Determining whether the yaw angle exceeds a preset angle threshold;

[0044] If the yaw angle exceeds the angle threshold, determining whether the current wind force level exceeds a preset wind force level threshold;

[0045] If the current wind force level does not exceed the wind force level threshold, the judgment result is that the nacelle is not in a high wind yaw state;

[0046] If the current wind force level exceeds the wind force level threshold, the judgment result is that the cabin is in the high-wind yaw state.

[0047] By adopting the above technical solution, the yaw angle of the cabin is obtained by combining the current risk data and operation data analysis, and then the yaw angle and the preset angle threshold are combined to preliminarily judge whether the cabin is in a yaw state. If the judgment result is that the yaw angle exceeds the angle threshold, the current wind force level and the preset wind force level threshold are combined to further judge whether the cabin is in a high wind yaw state.

[0048] Optionally, if the yaw angle exceeds the angle threshold, determining whether the current wind force level exceeds a preset wind force level threshold comprises the following steps:

[0049] If the yaw angle exceeds the angle threshold, counting the first statistical time when the yaw angle exceeds the angle threshold;

[0050] Determine whether the first statistical time exceeds a preset first delay time;

[0051] If the first statistical time exceeds the first delay time, determining whether the current wind force level exceeds a preset wind force level threshold;

[0052] and,

[0053] If the current wind force level exceeds the wind force level threshold, obtaining the judgment result that the nacelle is in the high wind yaw state includes the following steps:

[0054] If the current wind force level exceeds the wind force level threshold, then counting a second statistical time at which the current wind force level exceeds the wind force level threshold;

[0055] Determine whether the second statistical time exceeds a preset second delay time;

[0056] If the second statistical time exceeds the second delay time, the judgment result is that the cabin is in the high-wind yaw state.

[0057] By adopting the above technical solution, since the yaw angle and the current wind force level are both easily volatile data, when the yaw angle is at the edge of the angle threshold or the current wind force level is at the edge of the wind level threshold, it is easy for the data to repeatedly exceed the threshold in a short period of time due to data fluctuations, ultimately leading to multiple erroneous judgment results. Therefore, the preset delay time can effectively avoid judgment errors caused by data fluctuations.

[0058] Optionally, the yaw module includes at least three yaw motors, the yaw reduction boxes of all yaw motors in two yaw motor groups in the yaw control module are meshed with the yaw gear ring, and the two groups of yaw motors are controlled to output torques in different directions respectively so that the gears of the yaw reduction boxes fit the yaw gear ring, including the following steps:

[0059] Acquire motor information of all the yaw motors, wherein the motor information includes installation positions;

[0060] Calculating the straight-line distances between all the yaw motors and the blades of the wind turbine generator according to the installation positions;

[0061] Different numbers are marked for all the yaw motors according to the straight-line distances, and the larger the straight-line distance, the smaller the number of the corresponding yaw motor;

[0062] The yaw motors are divided into spare motor groups according to preset rules and the numbers, and all the remaining yaw motors are randomly divided into two yaw motor groups with the same number.

[0063] By adopting the above technical solution, since the blades of the wind turbine have a certain weight, the nacelle connected to the blades has a larger moment of inertia on one side of the blades during rotation. The larger the moment of inertia, the greater the rotational torque. Therefore, after obtaining the installation position of the yaw motor, the distance between the yaw motor and the blades can be calculated. Finally, the yaw motor far away from the blades is preferentially allocated as the yaw motor group, and the yaw motor close to the blades is divided into a spare motor group as an alternative.

[0064] Optionally, the motor information includes a total running time, and the method further includes the following steps:

[0065] Determining whether the total operation time of the yaw motor in the yaw motor group exceeds a preset time threshold;

[0066] If the total operation time exceeds the time threshold, the corresponding yaw motor is marked as a target yaw motor;

[0067] The target yaw motor in the yaw motor group is replaced by the yaw motor in the spare motor group.

[0068] By adopting the above technical solution, it is possible to determine whether the total operation time of the yaw motor is too long through a preset time threshold. If it is too long, the target yaw motor that is too long can be replaced with the yaw motor in the spare motor group, thereby avoiding as much as possible the safety problems caused by aging parts of the yaw motor in use.

[0069] In summary, this application includes the following beneficial technical effects:

[0070] After the acquisition module collects the current wind data and the operating data of the wind turbine, the analysis module analyzes whether the cabin of the wind turbine is in a strong wind yaw state according to the data collected by the acquisition module. If it is in a strong wind yaw state, the control module will control the yaw reduction boxes of the two sets of yaw motors to mesh with the yaw ring gear, and control the two sets of yaw motors to output torque in different directions respectively, so that the gears of the yaw reduction box fit the yaw ring gear. At this time, the gears of the yaw reduction box and the yaw ring gear are pressed against each other, and there is no tooth gap between the gears of the yaw reduction box and the yaw ring gear. If strong winds occur, the force exerted by the wind on the blades and the cabin will be partially offset by the torque output by the yaw motor, and the yaw motor and the yaw ring gear will not collide, thereby extending the service life of the yaw motor and the yaw ring gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] Figure 1 This is a system structure diagram of a high wind maintenance control system based on a power generator in one embodiment of the present application.

[0072] Figure 2 It is a system structure diagram of an analysis module according to one embodiment of the present application.

[0073] Figure 3 It is a system structure diagram of a yaw module according to one embodiment of the present application.

[0074] Figure 4 It is a flow chart of a high wind maintenance control method based on a wind turbine according to one embodiment of the present application.

[0075] Figure 5 It is a flowchart of one of the embodiments of the present application for analyzing whether the cabin is in a high-wind yaw state by combining current wind data and operating data.

[0076] Figure 6 It is a schematic diagram of the process of grouping yaw motors according to one embodiment of the present application.

[0077] Figure 7 It is a schematic diagram of the process of replacing a yaw motor according to one embodiment of the present application.

[0078] Description of reference numerals:

[0079] 1. Yaw module; 2. Acquisition module; 3. Analysis module; 4. Control module; 31. Analysis unit; 32. First judgment unit; 33. Second judgment unit; 34. Delay unit; 11. Information acquisition unit; 12. Calculation unit; 13. Marking unit; 14. Grouping unit; 15. Monitoring unit; 16. Replacement unit. DETAILED DESCRIPTION

[0080] The following is combined with Figures 1 to 7This application is described in further detail.

[0081] The embodiment of the present application discloses a high wind maintenance control system based on a wind turbine.

[0082] The wind turbine includes a nacelle connected with blades, a yaw gear ring is fixedly connected to the bottom of the nacelle, the yaw gear ring is meshed with a yaw motor, the yaw gear ring is coaxial with the nacelle and the two rotate synchronously.

[0083] Reference Figure 1 The high wind holding control system based on the wind turbine includes a yaw module 1, a collection module 2, an analysis module 3 and a control module 4, wherein the yaw module 1 includes two yaw motor groups, and the number of yaw motors in the two yaw motor groups is the same; the collection module 2 includes a wind vane and various sensors, and the collection module 2 can collect current wind data through the wind vane, and the current wind data includes current wind direction data and current wind level. The collection module 2 can also obtain the operation data of the wind turbine through various sensors, such as: obtaining the operating temperature of the wind turbine through a temperature sensor, obtaining the rotation angle of the wind turbine cabin through a rotation induction sensor, obtaining the rotation torque of the cabin through a torque sensor, and obtaining the output voltage of the wind turbine through a voltage sensor; the analysis module 3 is electrically connected to the collection module 2, and the analysis module 3 is used to analyze whether the cabin of the wind turbine is in a high wind yaw state in combination with the current wind data and the operation data.

[0084] The control module 4 is electrically connected to the analysis module 3 and the yaw module 1 respectively. When the analysis module 3 analyzes that the cabin is in a high-wind yaw state, the analysis module 3 outputs the analysis result to the control module 4, and the control module 4 responds to the analysis result and controls the yaw module 1 to perform a correction operation; when the analysis module 3 analyzes that the cabin is not in a high-wind yaw state, the analysis module 3 outputs the analysis result to the control module 4, and the control module 4 receives the analysis result and generates a control signal, and outputs the control signal to the yaw module 1, so that the yaw deceleration of the two sets of yaw motors in the yaw module 1 The gearbox meshes with the yaw gear ring, and controls the two yaw motors to output torque in different directions, so that the gear of the yaw reduction gearbox fits the yaw gear ring. Since the yaw gear ring and the cabin rotate synchronously on the same axis, the gear of the yaw reduction gearbox and the yaw gear ring are pressed against each other, and there is no backlash between the gear of the yaw reduction gearbox and the yaw gear ring. If there is a strong wind, the force exerted by the wind on the blades and the cabin will be partially offset by the torque output by the yaw motor, and the yaw motor and the yaw gear ring will not collide, thereby extending the service life of the yaw motor and the yaw gear ring. When the yaw gear ring changes direction, the torque output by the yaw motor will also change direction.

[0085] Reference Figure 2The analysis module 3 includes an analysis unit 31, a first judgment unit 32, a second judgment unit 33 and a delay unit 34, wherein the delay unit 34 is preset with a delay time, the delay time includes a first delay time and a second delay time, the first delay time is shorter than the second delay time in duration, the analysis unit 31 is electrically connected to the acquisition module 2, the acquisition module 2 outputs the collected current wind direction data, rotation angle and rotation torque to the analysis unit 31, and the analysis unit 31 performs analysis and calculation after receiving the data to obtain the yaw angle of the cabin. The first judgment unit 32 is preset with an angle threshold and is electrically connected to the delay unit 34 and the analysis unit 31 respectively. The first judgment unit 32 is used to judge whether the yaw angle exceeds the angle threshold. If the yaw angle does not exceed the angle threshold, no signal is output; if the yaw angle exceeds the angle threshold, the delay unit 34 records the first statistical time that the yaw angle exceeds the angle threshold, and the delay unit 34 judges in real time whether the first statistical time exceeds the first delay time. If the first statistical time does not exceed the first delay time, the delay unit 34 continues to record the first statistical time; if the first statistical time exceeds the first delay time, the delay unit 34 outputs a signal to the first judgment unit 32, so that the first judgment unit 32 outputs a judgment result.

[0086] The second judgment unit 33 is preset with a wind force level threshold and is electrically connected to the collection module 2 to receive the current wind force level collected by the collection module 2. The second judgment unit 33 is also electrically connected to the first judgment unit 32 to receive the judgment result output by the first judgment unit 32. After receiving the judgment result, the second judgment unit 33 judges whether the current wind force level exceeds the wind force level threshold. If the current wind force level does not exceed the wind force level threshold, the judgment result is that the cabin is not in a high wind yaw state; if the current wind force level exceeds the wind force level threshold, the delay unit 34 records the second statistical time that the current wind force level exceeds the wind force level threshold state, and the delay unit 34 judges in real time whether the second statistical time exceeds the second delay time. If the second statistical time does not exceed the second delay time, the delay unit 34 continues to record the second statistical time; if the second statistical time exceeds the second delay time, the delay unit 34 outputs a signal to the second judgment unit 33, so that the second judgment unit 33 obtains a judgment result, and the judgment result is that the cabin is in a high wind yaw state.

[0087] Reference Figure 3The yaw module 1 includes at least three yaw motors, an information acquisition unit 11, a calculation unit 12, a marking unit 13, a grouping unit 14, a monitoring unit 15 and a replacement unit 16. The information acquisition unit 11 is electrically connected to the yaw motor to obtain the motor information of the yaw motor. The motor information includes the total operation time and the installation position pre-stored in the yaw motor. The installation position indicates the specific position of the yaw motor inside the wind turbine. A polar coordinate system is established with the rotation center of the yaw gear ring as the origin. The coordinates of the center of gravity of the yaw motor are the installation position of the yaw motor. The calculation unit 12 is electrically connected to the signal acquisition unit to receive the installation position. The installation position of the blade is pre-stored in the calculation unit 12. A polar coordinate system is established with the rotation center of the yaw gear ring as the origin. The center point of the blade rotation axis is the installation position of the blade. The calculation unit 12 can calculate the straight-line distance between all yaw motors and blades through the installation position of the yaw motor and the installation position of the blade.

[0088] The marking unit 13 is electrically connected to the calculation unit 12 to receive the straight-line distance calculated by the calculation unit 12. The marking unit 13 sorts the straight-line distance from large to small, and marks different numbers for the corresponding yaw motors from small to large in the sorting order. For example, assuming that there are 3 yaw motors, and the straight-line distances between the 3 yaw motors and the blades are 1m, 3m, and 2.5m, respectively, after sorting and numbering, the yaw motor corresponding to the straight-line distance of 3m is numbered 1, the yaw motor corresponding to the straight-line distance of 2.5m is numbered 2, and the yaw motor corresponding to the straight-line distance of 1m is numbered 3. The marking unit 13 binds the marked number to the motor factory number of the yaw motor. If multiple yaw motors have the same straight-line distance during the numbering process, the factory date of the yaw motor is obtained, and the number of the yaw motor with a longer factory date is greater than the number of the yaw motor with a shorter factory date.

[0089] The grouping unit 14 is electrically connected to the marking unit 13 to receive the numbers of all yaw motors and group them according to preset rules. The grouping unit 14 presets a standby group list and two currently used group lists. The preset rules are as follows: when the number of yaw motors in the yaw module 1 is 4, the grouping unit 14 divides the two yaw motors with the largest numbers into the standby motor group, and enters the two numbers with the largest numbers into the standby group list, and divides the remaining two yaw motors into two yaw motor groups respectively, and enters the numbers of the remaining two yaw motors into the corresponding currently used group list; when the number of yaw motors in the yaw module 1 is 3 or more than 4, the grouping unit 14 divides the yaw motor with the largest number into the standby motor group, and enters the number of the yaw motor with the largest number into the standby group list, and randomly divides all the remaining yaw motors into two yaw motor groups, so that the number of yaw motors in the two yaw motor groups is the same, and enters the numbers of all the remaining yaw motors into the corresponding currently used group list. When the control module 4 controls the yaw motor, it only controls the yaw motors in the two yaw motor groups.

[0090] The monitoring unit 15 is preset with a time threshold and is electrically connected to the grouping unit 14 to receive two currently used group lists. The monitoring unit 15 is also electrically connected to the signal acquisition unit to receive the total operation time of the yaw motor. The monitoring unit 15 is used to monitor whether the total operation time of the yaw motors in the two currently used group lists exceeds the time threshold. If the total operation time does not exceed the time threshold, the monitoring continues; if the total operation time exceeds the time threshold, the yaw motor whose total operation time exceeds the time threshold is marked as the target yaw motor in the currently used group list. The replacement unit 16 is electrically connected to the monitoring unit 15 and the grouping unit 14 respectively. The replacement unit 16 receives the currently used group list from the monitoring unit 15, identifies the target yaw motor in the currently used group list, and interchanges the number of the identified target yaw motor with the number of the yaw motor in the standby group list.

[0091] The embodiment of the present application also discloses a high wind maintenance control method based on a wind turbine.

[0092] Reference Figure 4 The high wind control method based on the wind turbine generator comprises the following steps:

[0093] S101. Collect current wind power data and wind turbine operation data.

[0094] Among them, the current wind data can be collected through the wind vane, and the operating data includes operating temperature, cabin rotation angle, cabin rotation torque, output voltage, etc. The operating data can be obtained through various pre-set sensors.

[0095] S102. Analyze whether the nacelle of the wind turbine is in a high-wind yaw state in combination with the current wind data and operation data. If so, control the yaw module to perform a correction operation; if not, execute step S103.

[0096] S103. Control the yaw reduction gearboxes of all yaw motors in the two yaw motor groups in the yaw module to mesh with the yaw ring gear, and control the two groups of yaw motors to output torque in different directions respectively, so that the gears of the yaw reduction gearboxes fit the yaw ring gear.

[0097] The yaw gear ring rotates coaxially and synchronously with the nacelle, and the number of yaw motors in the two yaw motor groups is the same.

[0098] The implementation principle of this embodiment is:

[0099] After collecting the current wind data and the operating data of the wind turbine, whether the nacelle of the wind turbine is in a strong wind yaw state is analyzed according to the data collected by the acquisition module. If it is in a strong wind yaw state, the yaw reduction boxes of the two sets of yaw motors can be controlled to engage with the yaw ring gear, and the two sets of yaw motors can be controlled to output torque in different directions respectively, so that the gears of the yaw reduction box fit the yaw ring gear. At this time, the gears of the yaw reduction box and the yaw ring gear are pressed against each other, and there is no tooth gap between the gears of the yaw reduction box and the yaw ring gear. If strong winds occur, the force exerted by the wind on the blades and the nacelle will be partially offset by the torque output by the yaw motor, and the yaw motor and the yaw ring gear will not collide, thereby extending the service life of the yaw motor and the yaw ring gear.

[0100] exist Figure 4 In step S102 of the illustrated embodiment, the current wind data includes the current wind direction data and the current wind level, and the current wind data and the operation data can be combined to analyze whether the nacelle of the wind turbine is in a high wind yaw state. Figure 5 The illustrated embodiment is described in detail.

[0101] Reference Figure 5 , combining the current wind data and operation data to analyze whether the nacelle of the wind turbine is in a high wind yaw state includes the following steps:

[0102] S201. Analyze the current wind direction data and operation data to obtain the yaw angle of the cabin.

[0103] S202. Determine whether the yaw angle exceeds a preset angle threshold. If the yaw angle does not exceed the angle threshold, terminate the process; if the yaw angle exceeds the angle threshold, execute step S203.

[0104] S203. Count the first statistical time when the yaw angle exceeds the angle threshold.

[0105] S204. Determine whether the first statistical time exceeds the preset first delay time. If the first statistical time does not exceed the preset first delay time, terminate the process; if the first statistical time exceeds the preset first delay time, execute step S205;

[0106] S205. Determine whether the current wind force level exceeds the preset wind force level threshold. If the current wind force level does not exceed the preset wind force level threshold, execute step S206; if the current wind force level exceeds the preset wind force level threshold, execute step S207.

[0107] S206. The judgment result is that the cabin is not in a high wind yaw state.

[0108] S207. Count the second statistical time when the current wind force level exceeds the wind force level threshold.

[0109] S208. Determine whether the second statistical time exceeds the preset second delay time. If the second statistical time does not exceed the preset second delay time, terminate the process; if the second statistical time exceeds the preset second delay time, execute step S209.

[0110] S209. The judgment result is that the cabin is in a high wind yaw state.

[0111] The implementation principle of this embodiment is:

[0112] Since both the yaw angle and the current wind force level are easily volatile data, when the yaw angle is at the edge of the angle threshold or the current wind force level is at the edge of the wind level threshold, it is easy for the data to repeatedly exceed the threshold in a short period of time due to data fluctuations, ultimately leading to multiple erroneous judgment results. Therefore, the preset delay time can effectively avoid judgment errors caused by data fluctuations.

[0113] exist Figure 4 Before step S103 of the illustrated embodiment, the yaw module includes at least three yaw motors, and the yaw motors can be grouped according to their installation positions. Figure 6 The illustrated embodiment is described in detail.

[0114] Reference Figure 6 , before controlling the yaw reduction boxes of all yaw motors in the two yaw motor groups in the yaw module to mesh with the yaw gear ring, and controlling the two groups of yaw motors to output torque in different directions respectively, so that the gears of the yaw reduction boxes fit the yaw gear ring, the following steps are included:

[0115] S301. Obtain motor information of all yaw motors.

[0116] Among them, the motor information includes the installation position and the total operating time. The installation position indicates the specific position of the yaw motor inside the wind turbine. A polar coordinate system is established with the rotation center of the yaw gear ring as the origin. The coordinates of the center of gravity of the yaw motor are the installation position of the yaw motor.

[0117] S302. Calculate the straight-line distances between all yaw motors and blades of the wind turbine generator according to the installation positions.

[0118] The installation position of the wind turbine blade is pre-stored, and a polar coordinate system is established with the rotation center of the yaw gear ring as the origin, and the center point of the blade rotation axis is the installation position of the blade.

[0119] S303. Mark all yaw motors with different numbers according to the straight-line distance.

[0120] Among them, the larger the straight-line distance is, the smaller the number of the corresponding yaw motor is.

[0121] S304. Assign one or two yaw motors with the largest numbers to a spare motor group, and randomly assign all remaining yaw motors to two yaw motor groups with the same number.

[0122] The implementation principle of this embodiment is:

[0123] Since the blades of a wind turbine have a certain weight, the moment of inertia on one side of the blade is greater during the rotation of the nacelle connected to the blade. The greater the moment of inertia, the greater the rotational torque. Therefore, after obtaining the installation position of the yaw motor, the distance between the yaw motor and the blade can be calculated. Finally, the yaw motor far away from the blade is preferentially allocated as the yaw motor group, while the yaw motor close to the blade is divided into a spare motor group as an alternative.

[0124] exist Figure 6 After step S304 of the illustrated embodiment, the standby yaw motor may be automatically switched according to the total operation time of the yaw motor. Figure 7 The illustrated embodiment is described in detail.

[0125] Reference Figure 7 , automatically switching the standby yaw motor according to the total operation time of the yaw motor includes the following steps:

[0126] S401. Determine whether the total operation time of the yaw motor in the yaw motor group exceeds the preset time threshold. If the total operation time does not exceed the preset time threshold, no automatic switching operation is performed; if the total operation time exceeds the preset time threshold, execute step S402.

[0127] S402. Mark the corresponding yaw motor as a target yaw motor.

[0128] S403. Replace the target yaw motor in the yaw motor group with the yaw motor in the spare motor group.

[0129] The implementation principle of this embodiment is:

[0130] A preset time threshold can be used to determine whether the total operating time of the yaw motor is too long. If so, the target yaw motor that is too long can be replaced with a yaw motor in the spare motor group, thereby avoiding safety problems caused by aging parts of the yaw motor in use as much as possible.

[0131] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A wind turbine-based high wind control system, characterized in that: The system comprises: A yaw module (1) comprises two yaw motor groups, wherein the number of yaw motors in the two yaw motor groups is the same; A collection module (2), used for collecting current wind power data and wind turbine operation data; An analysis module (3), connected to the acquisition module (2), for analyzing, by combining the current wind data and the operation data, whether the nacelle of the wind turbine is in a high-wind yaw state; A control module (4) connected to the analysis module (3) and the yaw module (1) respectively; The nacelle is provided with a yaw gear ring meshing with all the yaw motors, the yaw gear ring is coaxial with the nacelle and the two rotate synchronously, and when the analysis module (3) analyzes that the nacelle is not in the high-wind yaw state, the control module (4) controls the two groups of yaw motors to output torque in different directions respectively, so that the gears of the yaw reduction box fit the yaw gear ring; Wherein, the yaw module (1) comprises at least three yaw motors, and the yaw module (1) further comprises: An information acquisition unit (11) is used to acquire motor information of all the yaw motors, wherein the motor information includes an installation position; A calculation unit (12), connected to the information acquisition unit (11), and used to calculate the straight-line distances between all the yaw motors and the blades of the wind generator according to the installation positions; A marking unit (13) connected to the calculation unit (12) and used to mark different numbers for all the yaw motors according to the straight-line distance, wherein the larger the straight-line distance, the smaller the number of the corresponding yaw motor; A grouping unit (14), connected to the marking unit (13), is used to group the yaw motors with the largest number according to a preset rule into a spare motor group, and randomly group all the remaining yaw motors into two yaw motor groups with the same number; If multiple yaw motors have the same straight-line distance during the numbering process, the production date of the yaw motor is obtained, and the number of the yaw motor with a longer production date is greater than the number of the yaw motor with a shorter production date; The motor information also includes the total operation time, and the yaw module (1) also includes: A monitoring unit (15) is preset with a time threshold and is connected to the signal acquisition unit and the grouping unit (14) respectively, and is used to determine whether the total operation time of each yaw motor in the yaw motor group exceeds the time threshold; if the total operation time exceeds the time threshold, the corresponding yaw motor is marked as a target yaw motor; a replacement unit (16), connected to the monitoring unit (15) and the grouping unit (14) respectively, and used to replace the target yaw motor in the yaw motor group with the yaw motor in the spare motor group; Among them, the moment of inertia on one side of the blade is greater, and the greater the moment of inertia, the greater the rotational torque; The installation position of the wind turbine blade is pre-stored, and a polar coordinate system is established with the rotation center of the yaw gear ring as the origin. The center point of the blade rotation axis is the installation position of the blade.

2. A wind turbine-based high wind control system according to claim 1, characterized in that: The current wind force data includes current wind direction data and current wind force level, and the analysis module (3) includes: An analysis unit (31), connected to the acquisition module (2), and configured to analyze the current wind direction data and the operation data to obtain a yaw angle of the nacelle; A first judgment unit (32), which is preset with an angle threshold and is connected to the analysis unit (31), and is used to judge whether the yaw angle exceeds the angle threshold; A second judgment unit (33) is preset with a wind force level threshold and is connected to the first judgment unit (32) and the collection module (2) respectively; When the first judgment unit (32) judges that the yaw angle exceeds the angle threshold, the second judgment unit (33) judges whether the current wind force level exceeds the wind force level threshold; If the current wind force level does not exceed the wind force level threshold, then the judgment result is that the nacelle is not in a high wind yaw state; If the current wind force level exceeds the wind force level threshold, the judgment result is that the cabin is in the high-wind yaw state.

3. A wind turbine-based high wind control system according to claim 2, characterized in that: The analysis module (3) further comprises: A delay unit (34) having a preset delay time and connected to the first judgment unit (32) and the second judgment unit (33) respectively, wherein the delay time includes a first delay time and a second delay time, and the first delay time is smaller than the second delay time; When the first judgment unit (32) judges that the yaw angle exceeds the angle threshold, the delay unit (34) counts a first statistical time when the yaw angle exceeds the angle threshold, and when the first statistical time exceeds the first delay time, the second judgment unit (33) judges whether the current wind force level exceeds the wind force level threshold; When the second judgment unit (33) judges that the current wind force level exceeds the wind force level threshold, the delay unit (34) counts a second statistical time during which the current wind force level exceeds the wind force level threshold, and when the second statistical time exceeds the second delay time, the second judgment unit (33) obtains the judgment result that the cabin is in the high-wind yaw state.

4. A high wind control method based on a wind turbine, characterized in that: The steps include: Collect current wind data and wind turbine operation data; Analyzing whether the nacelle of the wind turbine is in a high wind yaw state in combination with the current wind data and the operation data; If the nacelle is not in the high-wind yaw state, all the yaw motors in the two yaw motor groups in the yaw module are controlled to output torques in different directions respectively, so that the gears of the yaw reduction box fit the yaw gear ring, the yaw gear ring is coaxial with the nacelle and the two rotate synchronously, and the number of yaw motors in the two yaw motor groups is the same; The yaw module includes at least three yaw motors, the yaw reduction gearboxes of all yaw motors in two yaw motor groups in the yaw control module are meshed with the yaw gear ring, and the two groups of yaw motors are controlled to output torques in different directions respectively so that the gears of the yaw reduction gearboxes fit the yaw gear ring, including the following steps: Acquire motor information of all the yaw motors, wherein the motor information includes installation positions; Calculating the straight-line distances between all the yaw motors and the blades of the wind turbine generator according to the installation positions; Different numbers are marked for all the yaw motors according to the straight-line distances, and the larger the straight-line distance, the smaller the number of the corresponding yaw motor; The yaw motors with the largest number in a preset rule are divided into a spare motor group, and all the remaining yaw motors are randomly divided into two yaw motor groups with the same number; If multiple yaw motors have the same straight-line distance during the numbering process, the production date of the yaw motor is obtained, and the number of the yaw motor with a longer production date is greater than the number of the yaw motor with a shorter production date; Wherein, the motor information includes the total operation time, and the method further includes the following steps: Determining whether the total operation time of the yaw motor in the yaw motor group exceeds a preset time threshold; If the total operation time exceeds the time threshold, the corresponding yaw motor is marked as a target yaw motor; Replacing the target yaw motor in the yaw motor group with the yaw motor in the spare motor group; Among them, the moment of inertia on one side of the blade is greater, and the greater the moment of inertia, the greater the rotational torque; The installation position of the wind turbine blade is pre-stored, and a polar coordinate system is established with the rotation center of the yaw gear ring as the origin. The center point of the blade rotation axis is the installation position of the blade.

5. A high wind control method based on a wind turbine according to claim 4, characterized in that: The current wind force data includes current wind direction data and current wind force level, and the analyzing whether the nacelle of the wind turbine generator is in a high wind yaw state by combining the current wind force data and the operation data includes the following steps: Analyze the current wind direction data and the operation data to obtain the yaw angle of the nacelle; Determining whether the yaw angle exceeds a preset angle threshold; If the yaw angle exceeds the angle threshold, determining whether the current wind force level exceeds a preset wind force level threshold; If the current wind force level does not exceed the wind force level threshold, then the judgment result is that the nacelle is not in a high wind yaw state; If the current wind force level exceeds the wind force level threshold, the judgment result is that the cabin is in the high-wind yaw state.

6. A high wind control method based on a wind turbine according to claim 5, characterized in that: If the yaw angle exceeds the angle threshold, determining whether the current wind force level exceeds a preset wind force level threshold comprises the following steps: If the yaw angle exceeds the angle threshold, counting the first statistical time when the yaw angle exceeds the angle threshold; Determine whether the first statistical time exceeds a preset first delay time; If the first statistical time exceeds the first delay time, determining whether the current wind force level exceeds a preset wind force level threshold; and, If the current wind force level exceeds the wind force level threshold, obtaining the judgment result that the nacelle is in the high wind yaw state includes the following steps: If the current wind force level exceeds the wind force level threshold, then counting a second statistical time at which the current wind force level exceeds the wind force level threshold; Determine whether the second statistical time exceeds a preset second delay time; If the second statistical time exceeds the second delay time, the judgment result is that the cabin is in the high-wind yaw state.

Images