A wind turbine variable pitch gear ring collision control method, device, equipment and medium

Abstract

The application discloses a wind turbine variable pitch gear ring collision control method, device, equipment and readable storage medium. The method comprises the following steps: judging whether the variable pitch bearing gear ring and the variable pitch pinion of the wind turbine collide; if the collision occurs, judging whether the wind turbine is in a power generation state; if the wind turbine is in the power generation state, increasing the rotating speed of the wind wheel; and if the wind turbine is in a non-power generation state, collecting the blades to an angle greater than or equal to a preset angle. When the variable pitch bearing gear ring and the variable pitch pinion collide, if the wind turbine is in the power generation state, the rotating speed of the wind wheel is increased to increase the centripetal force of the blades, so that the variable pitch bearing gear ring is tightly attached to the tooth surface of the variable pitch pinion, thereby effectively avoiding the collision between the variable pitch bearing gear ring and the variable pitch pinion. If the wind turbine is in the non-power generation state, the blades are collected to a large angle to reduce the rotation of the wind wheel, thereby effectively reducing the collision frequency of the variable pitch bearing gear ring and the variable pitch pinion per unit time.

Description

Technical Field

[0001] This application relates to the field of wind turbine technology, and more specifically, to a method, apparatus, device, and readable storage medium for controlling collisions of the pitch gear ring of a wind turbine. Background Technology

[0002] In wind turbines, the pitch control system, controlled by motor gears, has a high probability of developing blade muzzle noise after years of operation. Specifically, in low wind conditions, the blades reciprocate at different positions, impacting the pitch pinion and producing abnormal noise. This noise not only generates noise but can also damage the tooth structure of the pitch pinion and the pitch bearing ring connected to the blades, leading to a decrease in the pitch angle control accuracy of the wind turbine.

[0003] In summary, how to effectively reduce the collision between the pitch bearing gear ring and the pitch pinion is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a method, device, equipment and readable storage medium for controlling collisions between the pitch bearing ring gear and the pitch pinion of a wind turbine.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A method for controlling collisions of the pitch ring gear in a wind turbine generator, comprising:

[0007] Determine whether the pitch bearing ring gear and the pitch pinion of the wind turbine unit are colliding.

[0008] If the pitch bearing gear ring collides with the pitch pinion, it is determined whether the wind turbine is in power generation mode.

[0009] If the wind turbine is generating electricity, then increase the rotor speed;

[0010] If the wind turbine is not generating electricity, the blades will be retracted to an angle greater than or equal to a preset angle.

[0011] Preferably, increasing the wind turbine's rotational speed includes:

[0012] Reduce the torque of the wind turbine while keeping the blade angle constant to increase the rotational speed of the wind turbine.

[0013] Preferred options also include:

[0014] Determine if the wind speed is greater than the preset wind speed;

[0015] If the wind speed is greater than the preset wind speed, then when the wind turbine is in power generation mode, the torque of the wind turbine is controlled to return to normal torque, and when the wind turbine is in non-power generation mode, normal blade control is restored, and the process returns to the step of determining whether the pitch bearing gear ring and the pitch pinion of the wind turbine collide.

[0016] If the wind speed is not greater than the preset wind speed, then return to the step of determining whether the wind turbine is in power generation state.

[0017] Preferably, determining whether a collision occurs between the pitch bearing ring gear and the pitch pinion of the wind turbine includes:

[0018] Acquire the first measurement data of the main encoder installed on the bearing side of the pitch motor and the second measurement data of the redundant encoder installed on the gear ring side of the pitch bearing;

[0019] Calculate the difference between the first measurement data and the second measurement data, and determine whether the difference is greater than a preset threshold.

[0020] If the difference is greater than the preset threshold, then record the period when the difference is greater than the preset threshold, and determine whether the period matches the rotational frequency corresponding to the wind turbine rotational speed at the current moment;

[0021] If the cycle time matches the rotational frequency corresponding to the wind turbine rotational speed at the current moment, then it is determined that the pitch bearing gear ring and the pitch pinion collide.

[0022] Preferably, if the cycle time does not match the rotational frequency corresponding to the wind turbine rotational speed at the current moment, the method further includes:

[0023] The wind turbine unit was reported to have malfunctioned and shut down.

[0024] Preferably, if the pitch bearing gear ring collides with the pitch pinion, the system further includes:

[0025] A warning is issued that the pitch bearing ring gear has collided with the pitch pinion.

[0026] Preferably, if the pitch bearing ring gear and the pitch pinion do not collide, the method further includes:

[0027] Cancel the previously issued warning.

[0028] A wind turbine pitch gear collision control device includes:

[0029] The first judgment module is used to determine whether the pitch bearing gear ring and the pitch pinion of the wind turbine unit collide.

[0030] The second judgment module is used to determine whether the wind turbine is in a power generation state if the pitch bearing gear ring collides with the pitch pinion.

[0031] The speed increase module is used to increase the speed of the wind turbine if the wind turbine is in power generation mode;

[0032] The blade retraction module is used to retract the blades to a preset angle greater than or equal to the preset angle if the wind turbine is not generating electricity.

[0033] A collision control device for a wind turbine pitch gear ring includes:

[0034] Memory, used to store computer programs;

[0035] A processor, configured to execute the computer program to implement the steps of the wind turbine pitch ring gear collision control method as described in any of the preceding claims.

[0036] A readable storage medium storing a computer program that, when executed by a processor, implements the steps of the wind turbine pitch ring gear collision control method as described in any of the preceding claims.

[0037] This application provides a method, device, equipment, and readable storage medium for controlling collisions between the pitch bearing ring gear and the pitch pinion of a wind turbine. The method includes: determining whether a collision occurs between the pitch bearing ring gear and the pitch pinion of the wind turbine; if a collision occurs, determining whether the wind turbine is in a power generation state; if the wind turbine is in a power generation state, increasing the rotational speed of the wind turbine; and if the wind turbine is in a non-power generation state, retracting the blades to a preset angle.

[0038] The technical solution disclosed in this application determines whether a collision occurs between the pitch bearing gear ring and the pitch pinion of a wind turbine. If a collision is confirmed, it determines whether the wind turbine is in power generation mode. When the wind turbine is in power generation mode, the rotor speed is increased to increase the centripetal force of the blades, keeping them taut. This allows the pitch bearing gear ring to remain firmly against the tooth surface of the pitch pinion, preventing further displacement. In other words, increasing the rotor speed effectively prevents collisions between the pitch bearing gear ring and the pitch pinion when the wind turbine is in power generation mode. When the wind turbine is not generating power, the blades are retracted to a preset angle greater than or equal to the preset angle, i.e., the blades are retracted to a large angle, in order to reduce the absorption of wind energy and reduce the rotation of the wind turbine. This effectively reduces the number of collisions between the pitch bearing gear ring and the pitch pinion per unit time, and thus effectively reduces the collision frequency of the pitch bearing gear ring and the pitch pinion. Furthermore, since the relatively few collisions between the pitch bearing gear ring and the pitch pinion occur at the position corresponding to the blade retracting to the large angle in this case, while the blades run at a small angle during normal operation control, the relatively few collisions between the pitch bearing gear ring and the pitch pinion will not affect the pitch angle control of the wind turbine. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0040] Figure 1 A flowchart of a collision control method for a wind turbine pitch ring gear provided in this application embodiment;

[0041] Figure 2 A schematic diagram of the structure of the pitch gear ring and pinion provided in an embodiment of this application;

[0042] Figure 3 A flowchart of another wind turbine pitch ring gear collision control method provided in this application embodiment;

[0043] Figure 4 A schematic diagram of a collision control device for a wind turbine pitch ring gear provided in this application embodiment;

[0044] Figure 5 This is a schematic diagram of a wind turbine pitch gear collision control device provided in an embodiment of this application. Detailed Implementation

[0045] Pitch control systems controlled by a motor and gears are prone to developing a muffled sound from the blades after years of operation. Specifically, this manifests as a muffled sound emanating from the blade gears when the rotor rotates to a specific position in light winds. This abnormal noise not only generates noise but can also damage the tooth structure of the pitch pinion and the pitch bearing gear ring connected to the blades, leading to a decrease in the pitch angle control accuracy of the wind turbine.

[0046] Therefore, this application provides a method, device, equipment, and readable storage medium for controlling collisions between the pitch bearing ring gear and the pitch pinion of a wind turbine, which can effectively reduce collisions.

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] See Figure 1 and Figure 2 ,in, Figure 1 This document illustrates a flowchart of a wind turbine pitch ring gear collision control method provided in an embodiment of this application. Figure 2 A schematic diagram of the pitch gear ring and pinion provided in an embodiment of this application is shown. An embodiment of this application provides a collision control method for a wind turbine pitch gear ring, which may include:

[0049] S11: Determine whether the pitch bearing ring gear of the wind turbine unit collides with the pitch pinion; if yes, proceed to step S12; otherwise, return to step S11.

[0050] Through analysis and research, the applicant discovered that during wind turbine operation in light winds, the blades are naturally curved, and their center of gravity is outside the blade axis, resulting in a gravitational torque. The blades are subjected to the combined effects of their own gravitational torque, wind load, and pitch bearing friction torque. At different positions on the blade, the gravitational torque and wind load successively dominate, causing the blades to reciprocate slightly, impacting the pitch pinion 2 and producing abnormal noise. When the wind speed increases and the turbine rotation speed rises, the blades are straightened due to centripetal force. At this time, the blade's center of gravity coincides with its axis, the gravitational torque at the axis disappears, and the centripetal force of the turbine becomes dominant, causing the pitch bearing gear ring 1 (blade) to press tightly against the tooth surface of the pitch pinion 2, eliminating the slight movement and the muffled noise. Therefore, this application is based on the above principle to effectively reduce the collision between the pitch bearing gear ring 1 and the pitch pinion 2.

[0051] Specifically, firstly, it can be determined whether the pitch bearing gear ring 1 and the pitch pinion 2 of the wind turbine are colliding. This can be determined by detecting any muffled noises or other abnormalities at the pitch bearing gear ring 1 and / or the pitch pinion 2. Furthermore, it is possible to monitor the collision status of the pitch bearing gear ring 1 and the pitch pinion 2 in real time, allowing for timely detection and mitigation of collisions, thereby effectively reducing their impact.

[0052] If, during the judgment process, it is determined that the pitch bearing gear ring 1 and the pitch pinion 2 have not collided, the process can return to step S11 and continue the judgment. If it is determined that the pitch bearing gear ring 1 and the pitch pinion 2 have collided, then step S12 can be executed.

[0053] S12: Determine whether the wind turbine is generating electricity; if yes, proceed to step S13; otherwise, proceed to step S14.

[0054] When it is determined that the pitch bearing gear ring 1 and the pitch pinion 2 collide, it can be determined whether the wind turbine is in the power generation state. Different collision handling methods can be adopted according to the different states of the wind turbine, so that the collision probability of the pitch bearing gear ring 1 and the pitch pinion 2 can be effectively reduced regardless of the state of the wind turbine (i.e., power generation state or non-power generation state).

[0055] S13: Increase the rotational speed of the wind turbine.

[0056] If it is determined that the wind turbine is in power generation mode, the rotor speed can be increased, that is, the rotor speed can be increased based on the existing rotor speed, so as to increase the centripetal force of the blades, thereby making the blades taut. At this time, the center of gravity of the blades coincides with its axis, the gravitational torque at the axis disappears, and the centripetal force of the rotor takes the dominant role. This makes the pitch bearing gear ring 1 connected to the blades tightly adhere to the tooth surface of the pitch pinion 2 and no longer collide. This effectively solves the collision between the pitch bearing gear ring 1 and the pitch pinion 2, thereby eliminating muffled noise and effectively avoiding damage to the tooth surface structure of the pitch bearing gear ring 1 and the pitch pinion 2. This makes it easier to improve the control accuracy of the pitch angle of the wind turbine.

[0057] S14: Retract the blades to an angle greater than or equal to the preset angle.

[0058] If the wind turbine is not generating power, it will not output any electrical energy and will be unable to increase the rotor speed. In this case, the wind turbine blades can be retracted to an angle greater than or equal to a preset angle. The size of the preset angle can be determined based on the blade retraction angle during normal operation, and the preset angle must be greater than the blade retraction angle during normal operation. Alternatively, the retraction angle of the blades after the wind turbine is shut down can be used as the preset angle. For example, the preset angle could be 20°.

[0059] In other words, when the wind turbine is not generating power, the blades are retracted to a large angle to reduce wind energy absorption and rotor rotation, thereby reducing the number of collisions between the pitch bearing ring 1 and the pitch pinion 2 per unit time. This reduces the collision frequency of the pitch bearing ring 1 and the pitch pinion 2, effectively reducing damage to their tooth surfaces. Furthermore, since the relatively few collisions between the pitch bearing ring 1 and the pitch pinion 2 occur at the large blade angle, an angle not involved in the normal pitch angle control of the wind turbine, the collision position of the pitch bearing ring 1 and the pitch pinion 2 is ensured to occur at the large blade angle. Therefore, the relatively few collisions between the pitch bearing ring 1 and the pitch pinion 2 in this situation will not affect the subsequent pitch angle control of the wind turbine.

[0060] As can be seen from the above, this application avoids the collision between the pitch bearing gear ring 1 and the pitch pinion 2 by controlling the wind turbine speed or the blade retraction control, so as to effectively reduce the probability of the collision between the pitch bearing gear ring 1 and the pitch pinion 2 of the wind turbine.

[0061] The technical solution disclosed in this application determines whether a collision occurs between the pitch bearing gear ring and the pitch pinion of a wind turbine. If a collision is confirmed, it determines whether the wind turbine is in power generation mode. When the wind turbine is in power generation mode, the rotor speed is increased to increase the centripetal force of the blades, keeping the blades taut. This ensures that the pitch bearing gear ring remains firmly against the tooth surface of the pitch pinion, preventing further displacement. In other words, increasing the rotor speed effectively prevents collisions between the pitch bearing gear ring and the pitch pinion when the wind turbine is in power generation mode. When the wind turbine is not generating power, the blades are retracted to a preset angle greater than or equal to the preset angle, i.e., the blades are retracted to a large angle, in order to reduce the absorption of wind energy and reduce the rotation of the wind turbine. This effectively reduces the number of collisions between the pitch bearing gear ring and the pitch pinion per unit time, and thus effectively reduces the collision frequency between the pitch bearing gear ring and the pitch pinion. Furthermore, since the fewer collisions between the pitch bearing gear ring and the pitch pinion occur at the position corresponding to the blades being retracted to a large angle in this situation, while the blades are running at a small angle during normal operation control, the fewer collisions between the pitch bearing gear ring and the pitch pinion will not affect the pitch angle control of the wind turbine.

[0062] See Figure 3 This document illustrates a flowchart of another wind turbine pitch ring gear collision control method provided in an embodiment of this application. The wind turbine pitch ring gear collision control method provided in this application, which increases the wind turbine's rotational speed, may include:

[0063] Reduce the rotor torque while keeping the blade angle constant to increase the rotor speed.

[0064] In this application, when the wind turbine is generating electricity, the kinetic energy can be increased by reducing the torque of the wind turbine while keeping the blade angle constant, thereby increasing the rotational speed of the wind turbine.

[0065] The wind turbine pitch ring gear collision control method provided in this application embodiment may further include:

[0066] Determine if the wind speed is greater than the preset wind speed;

[0067] If the wind speed is greater than the preset wind speed, the control of the wind turbine torque will be restored to normal torque when the wind turbine is in power generation state, and normal blade control will be restored when the wind turbine is in non-power generation state, and the process will return to the step of judging whether the pitch bearing gear ring 1 and the pitch pinion 2 of the wind turbine collide.

[0068] If the wind speed is not greater than the preset wind speed, return to the step of determining whether the wind turbine is generating electricity.

[0069] In this application, after performing step S13 or step S14, it can also be determined whether the current wind speed is greater than the preset wind speed. The preset wind speed can be set according to actual experience, for example, it can be 5 m / s.

[0070] If the current wind speed is greater than the preset wind speed, it indicates that the wind speed is relatively high, the wind energy is sufficient, and the wind turbine rotation speed is high enough. In this case, there will be no collision between the pitch bearing gear ring 1 and the pitch pinion 2. Therefore, when the wind turbine is generating electricity, the wind turbine torque can be controlled to return to normal torque. When the wind turbine is not generating electricity, normal blade control can be restored, that is, the blades will no longer be retracted to a state greater than or equal to the preset angle, but will return to the normal angle. Then, the step of judging whether the pitch bearing gear ring 1 and the pitch pinion 2 of the wind turbine have collided can be returned to the previous step to facilitate timely detection and handling of collisions.

[0071] If the current wind speed is not greater than the preset wind speed, it indicates that the wind speed is not high enough. Therefore, the process can be restarted to determine whether the wind turbine is generating electricity, so that different measures can be taken for different wind turbine states, thereby effectively reducing the collision between the pitch bearing gear ring 1 and the pitch pinion 2.

[0072] This application provides a collision control method for wind turbine pitch bearing ring gear 1, which determines whether a collision occurs between the pitch bearing ring gear 1 and the pitch pinion 2 of the wind turbine. The method may include:

[0073] Acquire the first measurement data of the main encoder installed on the 3 side of the pitch motor bearing and the second measurement data of the redundant encoder installed on the 1 side of the pitch bearing gear ring;

[0074] Calculate the difference between the first measurement data and the second measurement data, and determine whether the difference is greater than a preset threshold;

[0075] If the difference is greater than the preset threshold, the period of the difference being greater than the preset threshold is recorded, and it is determined whether the period of the difference matches the rotational frequency corresponding to the wind turbine rotational speed at the current moment.

[0076] If the cycle time matches the rotational frequency corresponding to the current wind turbine speed, then it is determined that the pitch bearing gear ring 1 and the pitch pinion 2 collide.

[0077] In this application, the collision between the pitch bearing gear ring 1 and the pitch pinion 2 of the wind turbine can be determined in the following way:

[0078] 1) Acquire the first measurement data (i.e., the measured blade pitch angle) from the main encoder installed on the pitch motor bearing 3 side, and acquire the second measurement data (also the measured blade pitch angle) from the redundant encoder installed on the pitch bearing gear ring 1 side. Normally, the first and second measurement data should match. However, when the pitch bearing gear ring 1 and the pitch pinion 2 collide, a deviation exists between the first and second measurement data. Therefore, the collision can be determined by the relationship between the first and second measurement data.

[0079] 2) After acquiring the first measurement data and the second measurement data, calculate the difference between the first measurement data and the second measurement data, and determine whether the difference is greater than the preset threshold δx, wherein the preset threshold δx is set based on actual experience.

[0080] 3) If the difference between the first measurement data and the second measurement data is greater than a preset threshold, the periodic time T during which the difference exceeds the preset threshold can be recorded. Specifically, the time t1 when the difference first exceeds the preset threshold and the time t2 when the difference second exceeds the preset threshold can be recorded. t2 ...subtract the time intervals of two consecutive times that exceed a preset threshold to obtain the time difference t. n -t n-1 And can measure the time difference t n -t n-1 The average is calculated to obtain the periodic time T at which the difference exceeds a preset threshold. Alternatively, any time difference t can be used. n -t n-1 The period T is the time interval when the difference is greater than a preset threshold.

[0081] 4) Determine the rotational frequency f corresponding to the current wind turbine speed and the cycle time T. lp Whether it matches, specifically, is determined by the rotational frequency f corresponding to the wind turbine speed, expressed in milliseconds as the cycle time T. lp Taking Hertz as an example, the relationship between the period time T and the rotor speed at the current moment corresponds to the rotational frequency f. lp Whether there is a match is determined by T = (1 / f) 1p If the equation 1000 holds true, then determine the rotational frequency f corresponding to the current wind turbine speed and the period time T. lp Matching, that is, determining that the deviation between the first and second measurement data is caused by the collision between the pitch bearing gear ring 1 and the pitch pinion 2, rather than by measurement error, then it can be determined that the pitch bearing gear ring 1 and the pitch pinion 2 have collided.

[0082] The above method can improve the accuracy of collision detection between pitch bearing gear ring 1 and pitch pinion 2, so as to enable timely and accurate corresponding actions and effectively reduce the collision between pitch bearing gear ring 1 and pitch pinion 2.

[0083] The wind turbine pitch ring gear collision control method provided in this application embodiment may further include the following if the cycle time does not match the rotational frequency corresponding to the current wind turbine rotational speed:

[0084] The wind turbine unit reported a malfunction and shutdown.

[0085] In this application, if the period time T is determined and the rotational frequency f corresponding to the current wind turbine rotational speed is determined, lp If there is a mismatch, it is determined that the discrepancy between the first and second measurement data is not caused by a collision between the pitch bearing gear ring 1 and the pitch pinion 2, but rather by a fault shutdown of the wind turbine. Therefore, the wind turbine fault shutdown can be reported so that relevant personnel can carry out subsequent handling, thereby improving safety and facilitating the improvement of the wind turbine's power generation performance.

[0086] The wind turbine pitch gear ring collision control method provided in this application embodiment may further include the following if a collision occurs between the pitch bearing gear ring 1 and the pitch pinion 2:

[0087] A warning is issued that the pitch bearing gear ring 1 has collided with the pitch pinion 2.

[0088] In this application, if it is determined that the pitch bearing gear ring 1 and the pitch pinion 2 have collided, a warning can be issued that the pitch bearing gear ring 1 and the pitch pinion 2 have collided. Specifically, the warning can be issued through at least one of the following methods: voice prompt, email, or SMS, so that relevant personnel can be informed in a timely manner that the pitch bearing gear ring 1 and the pitch pinion 2 have collided, thereby facilitating subsequent processing.

[0089] The wind turbine pitch gear collision control method provided in this application embodiment may further include the following if the pitch bearing gear ring 1 and the pitch pinion 2 do not collide:

[0090] Cancel the previously issued warning.

[0091] In this application, if it is determined through continuous detection and judgment that the pitch bearing gear ring 1 and the pitch pinion 2 do not collide, the previously issued warning can be eliminated to avoid false warnings and to avoid giving incorrect prompts to relevant personnel.

[0092] This application also provides a wind turbine pitch ring gear collision control device. See [link to relevant documentation] Figure 4 It shows a structural schematic diagram of a wind turbine pitch ring gear collision control device provided in an embodiment of this application, which may include:

[0093] The first judgment module 31 is used to determine whether the pitch bearing gear ring and the pitch pinion of the wind turbine unit collide.

[0094] The second judgment module 32 is used to determine whether the wind turbine is in a power generation state if the pitch bearing gear ring collides with the pitch pinion.

[0095] The speed increase module 33 is used to increase the speed of the wind turbine if the wind turbine is in power generation mode;

[0096] The blade retraction module 34 is used to retract the blades to a preset angle if the wind turbine is not generating electricity.

[0097] This application provides a wind turbine pitch ring gear collision control device, wherein the speed improvement module 33 may include:

[0098] The speed reduction unit is used to reduce the torque of the wind turbine while keeping the blade angle constant, thereby increasing the speed of the wind turbine.

[0099] The wind turbine pitch gear collision control device provided in this application embodiment may further include:

[0100] The third judgment module is used to determine whether the wind speed is greater than the preset wind speed;

[0101] The recovery module is used to restore the torque of the wind turbine to normal torque when the wind turbine is generating power, and restore normal blade control when the wind turbine is not generating power, if the wind speed is greater than the preset wind speed, and return to the step of judging whether the pitch bearing gear ring and the pitch pinion of the wind turbine collide.

[0102] The return execution module is used to return to the execution step of determining whether the wind turbine is in power generation state if the wind speed is not greater than the preset wind speed.

[0103] This application provides a wind turbine pitch ring gear collision control device, wherein the first judgment module 31 may include:

[0104] The acquisition unit is used to acquire the first measurement data of the main encoder installed on the bearing side of the pitch motor and the second measurement data of the redundant encoder installed on the gear ring side of the pitch bearing.

[0105] The calculation unit is used to calculate the difference between the first measurement data and the second measurement data, and to determine whether the difference is greater than a preset threshold.

[0106] The recording unit is used to record the period when the difference is greater than the preset threshold if the difference is greater than the preset threshold, and to determine whether the period is matched with the rotational frequency corresponding to the wind turbine rotational speed at the current moment.

[0107] The determination unit is used to determine if the cycle time matches the rotational frequency corresponding to the wind turbine speed at the current moment, and thus determine if the pitch bearing gear ring and the pitch pinion collide.

[0108] The wind turbine pitch ring gear collision control device provided in this application embodiment may further include: the first judgment module 31 may also include:

[0109] The fault reporting and shutdown unit is used to report a fault shutdown of the wind turbine if the cycle time does not match the rotation frequency corresponding to the current wind turbine speed.

[0110] The wind turbine pitch gear collision control device provided in this application embodiment may further include:

[0111] The warning module is used to issue a warning if the pitch bearing ring gear collides with the pitch pinion.

[0112] The wind turbine pitch gear collision control device provided in this application embodiment may further include:

[0113] The warning cancellation module is used to cancel previously issued warnings if the pitch bearing ring gear and the pitch pinion do not collide.

[0114] This application also provides a wind turbine pitch ring gear collision control device. See [link to relevant documentation] Figure 5 It shows a structural schematic diagram of a wind turbine pitch ring gear collision control device provided in an embodiment of this application, which may include:

[0115] Memory 41 is used to store computer programs;

[0116] When processor 42 executes a computer program stored in memory 41, it can perform the following steps:

[0117] Determine whether the pitch bearing gear ring and the pitch pinion of the wind turbine collide; if they collide, determine whether the wind turbine is generating electricity; if it is, increase the rotor speed; if it is not generating electricity, retract the blades to a preset angle.

[0118] This application embodiment also provides a readable storage medium storing a computer program, which, when executed by a processor, can perform the following steps:

[0119] Determine whether the pitch bearing gear ring and the pitch pinion of the wind turbine collide; if they collide, determine whether the wind turbine is generating electricity; if it is, increase the rotor speed; if it is not generating electricity, retract the blades to a preset angle.

[0120] The readable storage medium may include various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0121] For a description of the relevant parts of the wind turbine pitch gear collision control device, equipment and readable storage medium provided in the embodiments of this application, please refer to the detailed description of the relevant parts of the wind turbine pitch gear collision control method provided in the embodiments of this application, which will not be repeated here.

[0122] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that the elements inherent in a process, method, article, or apparatus that includes a list of elements are included. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Additionally, portions of the technical solutions provided in the embodiments of this application that are consistent with the implementation principles of corresponding technical solutions in the prior art have not been described in detail to avoid excessive elaboration.

[0123] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling collisions of the pitch ring gear in a wind turbine generator set, characterized in that, include: Determine whether the pitch bearing ring gear and the pitch pinion of the wind turbine unit are colliding. If the pitch bearing gear ring collides with the pitch pinion, it is determined whether the wind turbine is in power generation mode. If the wind turbine is generating electricity, then increase the rotor speed; If the wind turbine is not generating electricity, the blades will be retracted to an angle greater than or equal to a preset angle.

2. The wind turbine pitch ring gear collision control method according to claim 1, characterized in that, Increasing the wind turbine's rotational speed includes: Reduce the torque of the wind turbine while keeping the blade angle constant to increase the rotational speed of the wind turbine.

3. The wind turbine pitch ring gear collision control method according to claim 2, characterized in that, Also includes: Determine if the wind speed is greater than the preset wind speed; If the wind speed is greater than the preset wind speed, then when the wind turbine is in power generation mode, the torque of the wind turbine is controlled to return to normal torque, and when the wind turbine is in non-power generation mode, normal blade control is restored, and the process returns to the step of determining whether the pitch bearing gear ring and the pitch pinion of the wind turbine collide. If the wind speed is not greater than the preset wind speed, then return to the step of determining whether the wind turbine is in power generation state.

4. The wind turbine pitch ring gear collision control method according to claim 1, characterized in that, Determining whether a collision occurs between the pitch bearing ring gear and the pitch pinion of a wind turbine includes: Acquire the first measurement data of the main encoder installed on the bearing side of the pitch motor and the second measurement data of the redundant encoder installed on the gear ring side of the pitch bearing; Calculate the difference between the first measurement data and the second measurement data, and determine whether the difference is greater than a preset threshold. If the difference is greater than the preset threshold, then record the period when the difference is greater than the preset threshold, and determine whether the period matches the rotational frequency corresponding to the wind turbine rotational speed at the current moment; If the cycle time matches the rotational frequency corresponding to the wind turbine rotational speed at the current moment, then it is determined that the pitch bearing gear ring and the pitch pinion collide.

5. The wind turbine pitch ring gear collision control method according to claim 4, characterized in that, If the cycle time does not match the rotational frequency corresponding to the wind turbine rotational speed at the current moment, then it further includes: The wind turbine unit was reported to have malfunctioned and shut down.

6. The wind turbine pitch ring gear collision control method according to claim 1, characterized in that, If the pitch bearing gear ring collides with the pitch pinion, then the following is also included: A warning is issued that the pitch bearing ring gear has collided with the pitch pinion.

7. The wind turbine pitch ring gear collision control method according to claim 6, characterized in that, If the pitch bearing ring gear and the pitch pinion do not collide, then the following is also included: Cancel the previously issued warning.

8. A collision control device for a wind turbine pitch ring gear, characterized in that, include: The first judgment module is used to determine whether the pitch bearing gear ring and the pitch pinion of the wind turbine unit collide. The second judgment module is used to determine whether the wind turbine is in a power generation state if the pitch bearing gear ring collides with the pitch pinion. The speed increase module is used to increase the speed of the wind turbine if the wind turbine is in power generation mode; The blade retraction module is used to retract the blades to a preset angle greater than or equal to the preset angle if the wind turbine is not generating electricity.

9. A collision control device for a wind turbine pitch gear ring, characterized in that, include: Memory, used to store computer programs; A processor, configured to execute the computer program to implement the steps of the wind turbine pitch gear collision control method as described in any one of claims 1 to 7.

10. A readable storage medium, characterized in that, The readable storage medium stores a computer program that, when executed by a processor, implements the steps of the wind turbine pitch gear collision control method as described in any one of claims 1 to 7.

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