A yaw motor flexible brake control method and system for a wind turbine generator system

Abstract

The application discloses a yaw motor flexible brake control method and system of a wind turbine generator set, and relates to the technical field of wind turbine generator sets. The method comprises the following steps: acquiring wind data of the surrounding environment of the wind turbine generator set within a preset time period; acquiring the running state of a yaw system in the wind turbine generator set and the yaw system speed; judging whether the wind data is abnormal; if the wind data is abnormal, generating a brake braking scheme of a brake braking system in combination with the running state and the yaw system speed, wherein the brake braking scheme comprises an emergency braking scheme; and if the brake braking scheme is the emergency braking scheme, operating the brake braking system according to a flexible input scheme to reduce the collision impact between the brake braking system and the yaw system. The application can flexibly input the brake braking system when the surrounding environment wind is abnormal, so as to reduce the collision impact between the brake braking system and the yaw system in the process of reducing the yaw system speed.

Description

Technical Field

[0001] This application relates to the field of wind turbine generator technology, and in particular to a flexible brake control method and system for the yaw motor of a wind turbine generator. Background Technology

[0002] A wind turbine is a system that converts the kinetic energy of wind into electrical energy. The blades of a wind turbine rotate under the influence of wind to generate electricity. In order to maintain the utilization rate of wind energy, a yaw system can be used to adjust the rotor to face the wind direction.

[0003] A yaw system typically includes a yaw motor, a yaw motor brake, a yaw reduction gearbox, a yaw hydraulic braking system, and a yaw bearing. When yaw correction is needed, the yaw system, through the cooperation of the motor and reduction gearbox, rotates the impeller to align it with the wind direction. When yaw stops, to prevent the turbine nose from being pushed by the wind, the yaw motor brake and the yaw hydraulic braking system work together to provide braking force to maintain the current yaw position. If deceleration and stopping the entire yaw system are required, the main control system sends a deceleration command to the yaw system via the communication line. The yaw hydraulic braking system then engages, providing braking force while simultaneously directly engaging the yaw motor brake. The brake also provides braking force to the yaw motor to achieve acceleration and deceleration.

[0004] Regarding the aforementioned technologies, the inventors believe the following drawbacks exist: During yaw deceleration, after the yaw hydraulic braking system is engaged, the yaw motor's low speed and limited output torque result in a weak load-carrying capacity. Furthermore, the turbine nacelle is still in operation, and the braking force provided by the yaw hydraulic braking system is less than the nominal value during dynamic friction. If the surrounding wind intensifies, causing a sudden and significant increase in the external load on the turbine, the turbine nacelle will experience excessive yaw speed under wind pressure. If the yaw motor holding brake is then directly engaged, the braking force will suddenly increase, causing a violent impact on the yaw motor and yaw reduction gearbox, potentially damaging the entire yaw system. Summary of the Invention

[0005] To address the drawback of directly engaging the yaw motor's holding brake when the surrounding wind force increases, which can easily cause severe impacts to the yaw motor and yaw reduction gearbox, this application provides a flexible holding brake control method and system for the yaw motor of a wind turbine generator set.

[0006] In a first aspect, this application provides a flexible brake control method for the yaw motor of a wind turbine generator set, comprising the following steps:

[0007] Acquire wind data of the surrounding environment of the wind turbine generator within a preset time period;

[0008] Obtain the operating status and yaw speed of the yaw system in the wind turbine generator set;

[0009] Determine if the wind force data is abnormal;

[0010] If the wind data is abnormal, a brake braking scheme for the brake braking system is generated by combining the operating status and the yaw system speed. The brake braking scheme includes an emergency braking scheme.

[0011] If the brake-holding braking scheme is the emergency braking scheme, then the brake-holding braking system is operated according to the flexible deployment scheme to reduce the collision impact between the brake-holding braking system and the yaw system.

[0012] By adopting the above technical solution, the operating status and rotational speed of the yaw system are obtained, and wind data within a preset time period are monitored to determine in real time whether the wind conditions of the surrounding environment are abnormal. If a sudden strong wind or other abnormal situation occurs and the yaw system needs to brake and decelerate, a braking scheme for the holding brake system is generated based on the specific operating status and rotational speed of the yaw system. The holding brake scheme includes an emergency braking scheme. When the holding brake scheme is an emergency braking scheme, the holding brake system is operated according to the flexible engagement scheme, so that the holding brake system is engaged flexibly and the braking force is increased slowly. Compared with the direct engagement of the holding brake system, which causes a sudden increase in braking force, the collision impact between the holding brake system and the yaw system can be reduced, thereby reducing the possibility of damage to the holding brake system and the yaw system.

[0013] Optionally, the operating state includes a startup state and a non-start state, and the step of generating a brake braking scheme for the brake braking system by combining the operating state and the yaw system speed includes the following steps:

[0014] Determine whether the running state is the started state or the not started state;

[0015] If the operating state is the "not started" state, then no brake braking scheme for the brake braking system will be generated.

[0016] If the operating state is the start state, then determine whether the yaw system speed exceeds the preset speed threshold.

[0017] If the yaw system speed exceeds the speed threshold, the brake braking scheme generated for the brake system is the emergency braking scheme.

[0018] By adopting the above technical solution, the operating status of the yaw system is first determined. If the yaw system is in an unstarted state, there is no need to generate a brake-holding scheme. If the yaw system is in an started state, different braking schemes need to be generated according to the yaw system speed. If the yaw system speed exceeds the preset speed threshold, the yaw system motor is in an overspeed operation state and needs to be immediately braked to decelerate. Therefore, the brake-holding scheme generated for the brake-holding system is an emergency braking scheme.

[0019] Optionally, the method further includes the following steps:

[0020] If the yaw system speed does not exceed the speed threshold, then determine whether the yaw system speed is 0;

[0021] If the yaw system speed is 0, then the brake braking scheme generated for the brake system is an emergency cut-out scheme;

[0022] If the yaw system speed is not 0, then the brake braking scheme generated for the brake system is a normal braking scheme.

[0023] By adopting the above technical solution, when it is determined that the yaw system is in the activated state and the yaw system speed has not exceeded the speed threshold, the specific brake-holding scheme can be further determined based on whether the yaw system speed is 0. When the yaw system speed is 0, it can be determined that the initial state of the brake-holding system is engaged. Therefore, an emergency cut-out scheme needs to be generated to allow the brake-holding system to cut out flexibly. The flexible cut-out process of the brake-holding system will slowly reduce the braking force on the yaw system, thereby reducing the possibility of the yaw system overspeeding due to a sudden drop in braking force. When the yaw system speed is not 0, the normal braking scheme of directly engaging the brake-holding system can be used to brake the yaw system.

[0024] Optionally, the method further includes the following steps:

[0025] If the brake braking scheme is the emergency cut-out scheme, then the brake braking system will operate with the preset maximum output current and maximum output voltage and perform the brake cut-out operation.

[0026] During the operation time of the brake system, the output current and output voltage of the brake system are gradually reduced, and both the output current and the output voltage are proportional to the operation time.

[0027] When the output current reaches the preset minimum output current or the output voltage reaches the preset minimum output voltage, the holding brake system stops operating.

[0028] By adopting the above technical solution, the brake system needs to perform a flexible cut-out when executing the emergency cut-out plan. The specific flexible cut-out steps are as follows: first, the brake system is operated with the maximum output current and maximum output voltage. Then, the output voltage and output current are gradually reduced over time to gradually reduce the braking force output by the brake system. When the output current or output voltage reaches the minimum output current or minimum output voltage, the brake system is stopped, completing the entire flexible cut-out process of the brake system. This reduces the possibility of the yaw system experiencing speed overspeed due to a sudden drop in braking force.

[0029] Optionally, operating the brake system according to the flexible deployment scheme to reduce the collision impact between the brake system and the yaw system includes the following steps:

[0030] The brake system operates with a preset minimum output current and minimum output voltage and performs brake engagement operation.

[0031] During the operation time of the brake system, the output current and output voltage of the brake system are gradually increased, and both the output current and the output voltage are proportional to the operation time.

[0032] When the output current reaches the preset maximum output current or the output voltage reaches the preset maximum output voltage, the brake system stops operating.

[0033] By adopting the above technical solution, the brake system needs to be flexibly engaged when executing the emergency engagement plan. The specific flexible engagement steps are as follows: first, the brake system is operated with the minimum output current and minimum output voltage. Then, the output voltage and output current are gradually increased over time to gradually increase the braking force output by the brake system until the output current or output voltage reaches the maximum. At this point, the brake system is stopped, completing the entire flexible engagement process. The flexible engagement of the brake system can reduce the collision impact between the brake system and the yaw system, thereby reducing the possibility of damage to both systems.

[0034] Optionally, the method further includes the following steps:

[0035] Poll the real-time temperature of all brakes in the brake system;

[0036] Determine whether the real-time temperature exceeds a preset temperature threshold;

[0037] If the real-time temperature exceeds the temperature threshold, the corresponding target holding brake will stop operating.

[0038] If the real-time temperature of the target brake is lower than the temperature threshold during the polling process, the brake is restarted.

[0039] By adopting the above technical solution, the real-time temperature of all brakes can be monitored in real time during the operation of the brake system. When the real-time temperature of a brake exceeds the preset temperature threshold, it is determined that the brake is in an overheating state. At this time, the overheat protection mechanism needs to be activated and the brake is turned off until the brake is restarted when the real-time temperature is determined to be lower than the temperature threshold in the subsequent polling and comparison process.

[0040] Optionally, the wind data includes real-time wind speed and turbulence intensity, and determining whether the wind data is abnormal includes the following steps:

[0041] The average wind speed is calculated based on the real-time wind speed within the preset time period.

[0042] Determine whether the average wind speed and the turbulence intensity exceed the corresponding preset thresholds;

[0043] If neither the average wind speed nor the turbulence intensity exceeds the corresponding preset threshold, then the wind data is determined to be normal.

[0044] If at least one of the average wind speed and the turbulence intensity exceeds the corresponding preset threshold, the wind data is determined to be abnormal.

[0045] By adopting the above technical solution, and by monitoring the average wind speed and turbulence intensity within a preset time period, it is possible to make real-time judgments on the wind conditions around the wind turbine generator, thereby timely detecting severe situations such as sudden high wind speeds and strong turbulence.

[0046] Secondly, this application also provides a flexible brake control system for the yaw motor of a wind turbine generator set, including a processor and a memory, wherein the processor executes the method described in the first aspect when running computer instructions stored in the memory.

[0047] By adopting the above technical solution, the operating status and rotational speed of the yaw system are obtained through program retrieval, and wind data within a preset time period are monitored to determine in real time whether the wind conditions of the surrounding environment are abnormal. If a sudden strong wind or other abnormal situation occurs and the yaw system needs to brake and decelerate, a braking scheme for the holding brake system is generated based on the specific operating status and rotational speed of the yaw system. The holding brake scheme includes an emergency braking scheme. When the holding brake scheme is an emergency braking scheme, the holding brake system is operated according to the flexible engagement scheme, so that the holding brake system is engaged flexibly and the braking force is increased slowly. Compared with the direct engagement of the holding brake system, which causes a sudden increase in braking force, the collision impact between the holding brake system and the yaw system can be reduced, thereby reducing the possibility of damage to the holding brake system and the yaw system.

[0048] In summary, this application includes at least one of the following beneficial technical effects:

[0049] 1. Obtain the yaw system's operating status and rotational speed, and simultaneously monitor wind data within a preset time period to determine in real time whether the surrounding wind conditions are abnormal. If a sudden strong wind or other abnormal situation occurs and the yaw system needs to brake and decelerate, a braking scheme for the holding brake system is generated based on the specific operating status and rotational speed of the yaw system. The holding brake scheme includes an emergency braking scheme. When the holding brake scheme is an emergency braking scheme, the holding brake system is operated according to the flexible engagement scheme, so that the holding brake system is engaged flexibly and the braking force is increased slowly. Compared with directly engaging the holding brake system and causing a sudden increase in braking force, the collision impact between the holding brake system and the yaw system can be reduced, thereby reducing the possibility of damage to the holding brake system and the yaw system.

[0050] 2. When executing an emergency cut-out plan, the brake system needs to perform a flexible cut-out. The specific flexible cut-out steps are as follows: first, the brake system is operated at maximum output current and maximum output voltage. Then, the output voltage and output current are gradually reduced over time to gradually reduce the braking force output by the brake system. When the output current or output voltage reaches the minimum output current or minimum output voltage, the brake system is stopped, completing the entire flexible cut-out process of the brake system. This reduces the possibility of overspeeding in the yaw system due to a sudden drop in braking force. Attached Figure Description

[0051] Figure 1 This is a flowchart illustrating one embodiment of the flexible brake control method for the yaw motor of a wind turbine generator set according to this application.

[0052] Figure 2 This is a flowchart illustrating one embodiment of the flexible brake control method for the yaw motor of a wind turbine generator set according to this application.

[0053] Figure 3 This is a flowchart illustrating one embodiment of the flexible brake control method for the yaw motor of a wind turbine generator set according to this application.

[0054] Figure 4 This is a flowchart illustrating one embodiment of the flexible brake control method for the yaw motor of a wind turbine generator set according to this application.

[0055] Figure 5 This is a flowchart illustrating one embodiment of the flexible brake control method for the yaw motor of a wind turbine generator set according to this application.

[0056] Figure 6 This is a flowchart illustrating one embodiment of the flexible brake control method for the yaw motor of a wind turbine generator set according to this application.

[0057] Figure 7 This is a flowchart illustrating one embodiment of the flexible brake control method for the yaw motor of a wind turbine generator set according to this application. Detailed Implementation

[0058] The following is in conjunction with the appendix Figures 1 to 7 This application will be described in further detail.

[0059] This application discloses a flexible brake control method for the yaw motor of a wind turbine generator set.

[0060] Reference Figure 1 The flexible brake control method for the yaw motor of a wind turbine generator set includes the following steps:

[0061] S101. Obtain wind data of the surrounding environment of the wind turbine generator within a preset time period.

[0062] The wind speed sensor on the wind turbine acquires wind data of the surrounding environment, including real-time wind direction, real-time wind speed, turbulence intensity, etc. The preset time period is usually 5 minutes. That is, the wind data within 5 minutes is acquired and temporarily stored. After 5 minutes, the temporarily stored wind data is cleared, and then the wind data within the next 5-minute time period is acquired and temporarily stored.

[0063] S102. Obtain the operating status and rotational speed of the yaw system in the wind turbine generator set.

[0064] The yaw system's operating status and speed are obtained through the wind turbine's main control system. The yaw system includes a yaw motor and a yaw reduction gearbox. The yaw system's operating status includes both running and non-running states. The yaw system speed is the speed of the yaw motor.

[0065] S103. Determine if the wind data is abnormal. If the wind data is abnormal, proceed to step S104.

[0066] When the wind data is determined to be normal, if it is necessary to apply the brakes based on the yaw system's operating status and rotational speed, the main control system will generate a standard braking scheme for the brakes. The standard braking scheme involves directly engaging the brakes to brake the yaw system.

[0067] S104. Generate a brake braking scheme for the holding brake system by combining the operating status and the yaw system speed.

[0068] The main control system generates a braking scheme for the yaw system by combining the operating status and speed of the yaw system. The braking scheme includes emergency braking scheme and normal braking scheme. The main braking system is an electromagnetic brake.

[0069] S105. If the brake braking scheme is an emergency braking scheme, the brake braking system shall be operated according to the flexible deployment scheme to reduce the collision impact between the brake braking system and the yaw system.

[0070] First, it is determined which type of brake braking scheme is generated. If it is an emergency braking scheme, the brake braking system is operated according to the flexible deployment scheme, so that the brake braking system is flexibly deployed and the braking force is slowly increased, thereby reducing the collision impact between the brake braking system and the yaw system.

[0071] The implementation principle of one embodiment of this application is as follows:

[0072] The system acquires the yaw system's operating status and rotational speed, and simultaneously monitors wind data within a preset time period to determine in real time whether the surrounding wind conditions are abnormal. If a sudden strong wind or other abnormal situation occurs and the yaw system needs to brake and decelerate, a braking scheme for the holding brake system is generated based on the specific operating status and rotational speed of the yaw system. The holding brake scheme includes an emergency braking scheme. When the holding brake scheme is an emergency braking scheme, the holding brake system is operated according to the flexible engagement scheme, so that the holding brake system is engaged flexibly and the braking force is increased slowly. Compared with directly engaging the holding brake system and causing a sudden increase in braking force, this can reduce the collision impact between the holding brake system and the yaw system, thereby reducing the possibility of damage to the holding brake system and the yaw system.

[0073] In one embodiment of this application, the running state includes a startup state and a non-startup state, referring to... Figure 2 Step S104 specifically includes the following steps:

[0074] S201. Determine whether the running status is started or not started. If the running status is not started, proceed to step S202; if the running status is started, proceed to step S203.

[0075] S202. Do not generate a brake braking scheme for the brake braking system.

[0076] When the yaw system is not activated, it means that the wind force in the surrounding environment has suddenly increased, but the wind direction is directly in the direction of the impeller, so there is no need to activate the yaw system, and therefore no need to activate the brake system.

[0077] S203. Determine whether the yaw system speed exceeds the preset speed threshold. If the yaw system speed exceeds the speed threshold, proceed to step S204.

[0078] When the determination result is that the yaw system speed does not exceed the speed threshold, a specific solution needs to be generated based on whether the yaw system speed is 0.

[0079] S204. Generate the emergency braking scheme for the brake system.

[0080] The implementation principle of one embodiment of this application is as follows:

[0081] First, the operating status of the yaw system is determined. If the yaw system is in an off state, there is no need to generate a brake-holding scheme. If the yaw system is in an on state, different braking schemes need to be generated according to the yaw system speed. If the yaw system speed exceeds the preset speed threshold, the yaw system motor is in an overspeed operation state and an emergency braking deceleration is required immediately. Therefore, the brake-holding scheme generated for the brake-holding system is an emergency braking scheme.

[0082] In one embodiment of the present application, reference is made to Figure 3 When the judgment result of step S203 is that the yaw system speed does not exceed the speed threshold, the specific steps include the following:

[0083] S301. Determine if the yaw system speed is 0. If the yaw system speed is 0, proceed to step S304; if the yaw system speed is not 0, proceed to step S303.

[0084] S302. The brake braking scheme of the brake braking system is an emergency cut-out scheme.

[0085] Since the yaw system is in the activated state, but the yaw system speed is 0, it indicates that the initial state of the brake system is already engaged. Therefore, the brake system braking scheme needs to be generated as an emergency cut-out scheme. When the brake system braking scheme is an emergency cut-out scheme, the brake system is controlled according to the flexible cut-out scheme to make the brake system cut out flexibly and slowly reduce the braking force, thereby reducing the possibility of the yaw system speed overspeeding due to the sudden drop in braking force.

[0086] S303. The brake braking scheme of the brake braking system is a normal braking scheme.

[0087] Since the yaw system is in the activated state and the yaw system speed is within the normal speed range, the ordinary braking scheme of directly engaging the holding brake system can be used as the holding brake scheme.

[0088] The implementation principle of one embodiment of this application is as follows:

[0089] When it is determined that the yaw system is in the activated state and the yaw system speed has not exceeded the speed threshold, the specific brake-holding scheme can be further determined based on whether the yaw system speed is 0. When the yaw system speed is 0, it can be determined that the initial state of the brake-holding system is engaged. Therefore, an emergency cut-out scheme needs to be generated to allow the brake-holding system to cut out flexibly. The flexible cut-out process of the brake-holding system will slowly reduce the braking force on the yaw system, thereby reducing the possibility of the yaw system speed overspeeding due to a sudden drop in braking force. When the yaw system speed is not 0, the normal braking scheme of directly engaging the brake-holding system can be used to brake the yaw system.

[0090] In one embodiment of the present application, reference is made to Figure 4 Following step S104, the following steps are also included:

[0091] S401. If the brake braking scheme is an emergency cut-out scheme, the brake braking system will operate with the preset maximum output current and maximum output voltage and perform the brake cut-out operation.

[0092] The preset maximum output current is 1.5A and the preset maximum output voltage is 24V.

[0093] S402. Gradually reduce the output current and output voltage of the brake system during its operation.

[0094] The output power can be controlled by an adjustable power module. Both the output current and output voltage are proportional to the running time. As the output current and output voltage are gradually reduced, the braking force of the holding brake system is also gradually reduced.

[0095] S403. When the output current reaches the preset minimum output current or the output voltage reaches the preset minimum output voltage, the holding brake system stops operating.

[0096] The preset minimum output current is 0.8A and the preset minimum output voltage is 12V. When the output current gradually decreases to the minimum output current or the output voltage gradually decreases to the minimum output voltage, the brake system stops operating, completing the entire flexible cut-out process of the brake system.

[0097] The implementation principle of one embodiment of this application is as follows:

[0098] When executing an emergency cut-out plan, the brake system needs to perform a flexible cut-out. The specific flexible cut-out steps are as follows: first, the brake system is operated at maximum output current and maximum output voltage. Then, the output voltage and output current are gradually reduced over time to gradually reduce the braking force output by the brake system. When the output current or output voltage reaches the minimum output current or minimum output voltage, the brake system is stopped, completing the entire flexible cut-out process of the brake system. This reduces the possibility of overspeeding in the yaw system due to a sudden drop in braking force.

[0099] In one embodiment of the present application, reference is made to Figure 5 Step S105 specifically includes the following steps:

[0100] S501. Operate the brake system with the preset minimum output current and minimum output voltage and perform the brake engagement operation.

[0101] The preset minimum output current is 0.8A and the preset minimum output voltage is 12V.

[0102] S502. Gradually increase the output current and output voltage of the brake system during its operation.

[0103] The output power can be controlled by an adjustable power module. Both the output current and output voltage are proportional to the running time. As the output current and output voltage gradually increase, the braking force of the holding brake system also gradually increases.

[0104] S503. When the output current reaches the preset maximum output current or the output voltage reaches the preset maximum output voltage, the holding brake system stops operating.

[0105] The preset maximum output current is 1.5A and the preset maximum output voltage is 24V. When the output current gradually increases to the maximum output current or the output voltage gradually increases to the maximum output voltage, the brake system stops operating, completing the entire flexible engagement process of the brake system.

[0106] The implementation principle of one embodiment of this application is as follows:

[0107] When implementing an emergency engagement plan, the brake system requires flexible engagement. The specific flexible engagement steps are as follows: first, operate the brake system with the minimum output current and minimum output voltage; then, gradually increase the output voltage and output current over time to gradually increase the braking force output by the brake system until the output current or output voltage reaches the maximum. At this point, stop operating the brake system to complete the entire flexible engagement process. Flexible engagement of the brake system can reduce the collision impact between the brake system and the yaw system, thereby reducing the possibility of damage to both systems.

[0108] In one embodiment of the present application, reference is made to Figure 6 Before stopping the operation of the holding brake system in step S503 or step S403, the following steps are also included:

[0109] S601. Poll the real-time temperature of all brakes in the brake system.

[0110] The system uses temperature sensors to obtain the real-time temperature of all brakes. There are usually eight brakes, and the real-time temperature of each brake is obtained in a preset polling order.

[0111] S602. Determine whether the real-time temperature exceeds the preset temperature threshold. If the real-time temperature exceeds the temperature threshold, proceed to step S603.

[0112] During the polling process, for each real-time temperature of a brake, the real-time temperature is compared with a preset temperature threshold. If the real-time temperature does not exceed the temperature threshold, no other operation is performed on the corresponding brake.

[0113] S603. Stop operating the corresponding target brake.

[0114] S604. If the real-time temperature of the target brake is lower than the temperature threshold during the polling process, the brake will be restarted.

[0115] If, in any subsequent polling comparison, the target brake is determined to have a real-time temperature below the temperature threshold, then the brake will be restarted.

[0116] The implementation principle of one embodiment of this application is as follows:

[0117] During the operation of the brake system, the real-time temperature of all brakes can be monitored. When the real-time temperature of a brake exceeds the preset temperature threshold, it is determined that the brake is in an overheating state. At this time, the overheat protection mechanism needs to be activated and the brake is turned off. The brake will only be restarted when the real-time temperature is determined to be below the temperature threshold in the subsequent polling and comparison process.

[0118] In one embodiment of this application, the wind data includes real-time wind speed and turbulence intensity, referring to... Figure 7 Step S103 specifically includes the following steps:

[0119] S701. Calculate the average wind speed based on the real-time wind speed within a preset time period.

[0120] The preset time period is usually 5 minutes. The real-time wind speed within 5 minutes can be obtained by using a wind speed sensor, and the average wind speed can be obtained by calculating the average value of the real-time wind speed within 5 minutes.

[0121] S702. Determine whether the average wind speed and turbulence intensity exceed the corresponding preset thresholds. If neither the average wind speed nor the turbulence intensity exceeds the corresponding preset thresholds, proceed to step S703. If at least one of the average wind speed and turbulence intensity exceeds the corresponding preset threshold, proceed to step S704.

[0122] Determining wind speed requires judging whether the average wind speed within a preset time period exceeds a preset wind speed threshold, while determining turbulence intensity only requires judging whether the turbulence intensity at any moment within a preset time period exceeds a preset intensity threshold.

[0123] S703. The wind force data is determined to be normal.

[0124] S704. An anomaly has been detected in the wind force data.

[0125] The implementation principle of one embodiment of this application is as follows:

[0126] By monitoring the average wind speed and turbulence intensity within a preset time period, it is possible to make real-time judgments on the wind conditions around the wind turbine generator, thereby promptly detecting severe situations such as sudden high wind speeds and strong turbulence.

[0127] This application also discloses a flexible brake control system for the yaw motor of a wind turbine generator, including a processor and a memory. When the processor executes computer instructions stored in the memory, it performs actions such as... Figures 1 to 7 The method shown.

[0128] The implementation principle of this application embodiment is as follows:

[0129] The program retrieves the yaw system's operating status and rotational speed, while simultaneously monitoring wind data within a preset time period to determine in real-time whether the surrounding wind conditions are abnormal. If a sudden strong wind or other abnormal situation occurs and the yaw system needs to brake and decelerate, a braking scheme for the holding brake system is generated based on the specific operating status and rotational speed of the yaw system. This braking scheme includes an emergency braking scheme. When the braking scheme is an emergency braking scheme, the holding brake system is operated according to the flexible engagement scheme, allowing the holding brake system to be engaged flexibly and gradually increase the braking force. Compared to directly engaging the holding brake system and causing a sudden increase in braking force, this reduces the collision impact between the holding brake system and the yaw system, thereby reducing the possibility of damage to both systems.

[0130] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A flexible brake control method for the yaw motor of a wind turbine generator set, characterized in that, Includes the following steps: Acquire wind data of the surrounding environment of the wind turbine generator within a preset time period; Obtain the operating status and yaw speed of the yaw system in the wind turbine generator set; Determine if the wind force data is abnormal; If the wind data is abnormal, a brake braking scheme for the brake braking system is generated by combining the operating status and the yaw system speed. The brake braking scheme includes an emergency braking scheme. If the brake-holding braking scheme is the emergency braking scheme, then the brake-holding braking system is operated according to the flexible deployment scheme to reduce the collision impact between the brake-holding braking system and the yaw system; The step of operating the brake system according to the flexible deployment scheme to reduce the collision impact between the brake system and the yaw system includes the following steps: The brake system operates with a preset minimum output current and minimum output voltage and performs brake engagement operation. During the operation time of the brake system, the output current and output voltage of the brake system are gradually increased, and both the output current and the output voltage are proportional to the operation time. When the output current reaches the preset maximum output current or the output voltage reaches the preset maximum output voltage, the brake system stops operating.

2. The flexible brake control method for the yaw motor of a wind turbine generator set according to claim 1, characterized in that, The operating state includes an active state and a non-active state. The step of generating a brake braking scheme for the brake system by combining the operating state and the yaw system speed includes the following steps: Determine whether the running state is the started state or the not started state; If the operating state is the "not started" state, then no brake braking scheme for the brake braking system will be generated. If the operating state is the start state, then determine whether the yaw system speed exceeds the preset speed threshold. If the yaw system speed exceeds the speed threshold, the brake braking scheme generated for the brake system is the emergency braking scheme.

3. The flexible brake control method for the yaw motor of a wind turbine generator set according to claim 2, characterized in that, The method further includes the following steps: If the yaw system speed does not exceed the speed threshold, then determine whether the yaw system speed is 0; If the yaw system speed is 0, then the brake braking scheme generated for the brake system is an emergency cut-out scheme; If the yaw system speed is not 0, then the brake braking scheme generated for the brake system is a normal braking scheme.

4. The flexible brake control method for the yaw motor of a wind turbine generator set according to claim 3, characterized in that, The method further includes the following steps: If the brake braking scheme is the emergency cut-out scheme, then the brake braking system will operate with the preset maximum output current and maximum output voltage and perform the brake cut-out operation. During the operation time of the brake system, the output current and output voltage of the brake system are gradually reduced, and both the output current and the output voltage are proportional to the operation time. When the output current reaches the preset minimum output current or the output voltage reaches the preset minimum output voltage, the holding brake system stops operating.

5. A flexible brake control method for the yaw motor of a wind turbine generator set according to claim 1 or 4, characterized in that, The following steps are included before stopping the operation of the brake system: Poll the real-time temperature of all brakes in the brake system; Determine whether the real-time temperature exceeds a preset temperature threshold; If the real-time temperature exceeds the temperature threshold, the corresponding target holding brake will stop operating. If the real-time temperature of the target brake is lower than the temperature threshold during the polling process, the brake is restarted.

6. The flexible brake control method for the yaw motor of a wind turbine generator set according to claim 1, characterized in that, The wind data includes real-time wind speed and turbulence intensity. Determining whether the wind data is abnormal includes the following steps: The average wind speed is calculated based on the real-time wind speed within the preset time period. Determine whether the average wind speed and the turbulence intensity exceed the corresponding preset thresholds; If neither the average wind speed nor the turbulence intensity exceeds the corresponding preset threshold, then the wind data is determined to be normal. If at least one of the average wind speed and the turbulence intensity exceeds the corresponding preset threshold, the wind data is determined to be abnormal.

7. A flexible brake control system for the yaw motor of a wind turbine generator set, characterized in that, It includes a processor and a memory, wherein the processor, when executing computer instructions stored in the memory, performs the method as described in any one of claims 1 to 6.

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