Wind turbine generator automatic lubrication control method, system and storage medium

Abstract

The application provides a wind turbine generator set generator automatic lubrication control method, system and storage medium, and belongs to the field of wind turbine generator sets. The method comprises the following steps: S1: setting a generator automatic lubrication reference parameter, the reference parameter comprising a grease injection period, a grease injection duration, a rotating speed threshold value and a running time limit value; S2: collecting wind turbine generator set running time and generator rotating speed data; S3: determining whether the grease injection condition is met according to the wind turbine generator set running time, the generator rotating speed data and the reference parameter, if yes, executing S4, otherwise jumping to S2; S4: under the condition that it is determined that the grease injection condition is met, calculating the current grease injection time according to the reference parameter and the wind turbine generator set running time; and S5: controlling the generator automatic lubrication system to perform grease injection according to the current grease injection time. The amount of grease injection is determined according to the running time of the generator, the lubrication demand of the bearing is ensured, and the rotating speed of the generator during grease injection is considered, so that the effectiveness of the grease injection is ensured.

Description

Technical Field

[0001] This application relates to the field of wind turbine generator sets, specifically to an automatic lubrication control method for a wind turbine generator set, an automatic lubrication control system for a wind turbine generator set, and a machine-readable storage medium. Background Technology

[0002] The generator is a crucial electrical component in a wind turbine generator set, playing a vital role in the unit's normal operation. Bearings are among the most vulnerable parts of the generator to failure. To extend the lifespan of the rotor bearings, timely grease application is essential to reduce wear. However, excessive grease application during prolonged high-speed operation can increase frictional torque, hindering proper heat dissipation and causing the bearing temperature to rise, leading to grease hardening. Conversely, insufficient grease application results in unreliable lubrication, causing dry friction and similarly increasing bearing temperature, ultimately impacting bearing life and causing damage.

[0003] The previous bearing grease injection logic involved the main control system controlling the grease injection for a fixed number of minutes each day. However, this grease injection strategy was indiscriminate, failing to consider whether the unit was running. This resulted in situations where the generator would be continuously greased even when the unit was shut down for extended periods. An optimized control strategy emerged: grease injection for a fixed number of minutes based on the unit's operating time. However, this strategy also has its problems. First, there's the issue of timing. As is well known, the rated speed of a doubly-fed generator is around 1700 rpm (approximately 28 revolutions per second). Injecting grease while the bearing is rotating at high speed prevents the grease from effectively penetrating the bearing, thus failing to provide lubrication. Second, if grease injection is performed after the unit has stopped running, the high viscosity and slow flow of the lubricating grease can lead to uneven distribution within the bearing, potentially causing leakage or direct discharge into the waste oil collection box. This results in the effective grease injection amount being less than the lubrication requirement, which over time affects bearing life and consequently, the safe and stable operation of the unit. Therefore, optimizing the grease injection strategy to improve bearing life is a problem worthy of further research. Summary of the Invention

[0004] The purpose of this application is to provide an automatic lubrication control method, system, and storage medium for wind turbine generators. This method determines the amount of grease to be injected based on the generator's operating time, while also considering the generator's rotational speed during grease injection, so that the generator can achieve sufficient lubrication of the bearings after grease injection. This allows the generator bearings to operate in optimal condition throughout their lifespan, extending the bearing's service life and improving the safety and stability of bearing operation.

[0005] To achieve the above objectives, the first aspect of this application provides an automatic lubrication control method for a wind turbine generator set, the method comprising:

[0006] S1: Set the automatic lubrication reference parameters for the generator, including the grease injection cycle, grease injection duration, speed threshold, and operating time limit;

[0007] S2: Collect data on wind turbine generator running time and generator speed;

[0008] S3: Determine whether the grease injection conditions are met based on the wind turbine generator set running time, generator speed data and the reference parameters. If yes, proceed to S4; otherwise, jump to S2.

[0009] S4: If the grease injection conditions are met, calculate the current grease injection time based on the benchmark parameters and the operating time of the wind turbine generator set;

[0010] S5: Controls the generator's automatic lubrication system to perform grease injection according to the current required grease injection time.

[0011] Based on the above technical means, the grease injection cycle and grease injection time are set as the standard for grease injection. At the same time, the amount of grease is determined according to the generator's running time to ensure the lubrication requirements of the bearings. The generator speed during grease injection is also taken into account to ensure the effectiveness of grease injection, so that the generator can fully lubricate the bearings after grease injection.

[0012] In this embodiment of the application, determining whether the grease injection conditions are met based on the operating time of the wind turbine generator set and the reference parameters includes:

[0013] Determine whether the operating grease injection time condition is met based on the wind turbine generator set's operating time, grease injection cycle, and operating time limit.

[0014] If the grease injection time condition is met, the grease injection speed condition is determined based on the speed threshold and generator speed data. If the grease injection speed condition is met, the grease injection condition is determined to be met.

[0015] If the grease injection duration condition is not met, determine whether the controlled-speed grease injection duration condition is met based on the grease injection duration condition value. If the controlled-speed grease injection duration condition is met, then the grease injection condition is determined to be met.

[0016] Based on the above technical means, firstly, the grease injection is divided into two categories based on whether the collected wind turbine generator running time meets the grease injection time conditions and the grease injection speed conditions. The latter category is divided into grease injection that meets both the grease injection time and speed conditions and speed control grease injection that does not meet the grease injection time conditions but meets the speed control grease injection time conditions. This ensures proper grease injection for the generator and avoids dry running of the bearings due to prolonged lack of grease injection, which would affect the service life of the generator.

[0017] In this embodiment of the application, determining whether the operating grease injection time condition is met based on the wind turbine generator's operating time, grease injection cycle, and operating time limit includes:

[0018] Compare the operating time, grease injection cycle, and operating time limit of wind turbine generator sets;

[0019] If the operating time of the wind turbine generator is greater than or equal to the grease injection cycle and less than the operating time limit, then the operating grease injection time condition is met; otherwise, the grease injection time condition is not met.

[0020] Based on the above technical means, it is possible to effectively determine whether the current operating time of the wind turbine generator meets the operating grease injection time requirements.

[0021] In this embodiment of the application, determining whether the operating grease injection speed condition is met based on the speed threshold and generator speed data includes:

[0022] Calculate the average speed per unit time based on the generator speed data;

[0023] Compare the average rotational speed with the corresponding rotational speed threshold;

[0024] If the average rotational speed is less than or equal to the corresponding rotational speed threshold, the operating grease injection speed condition is determined to be met; otherwise, the operating grease injection speed condition is determined not to be met.

[0025] Based on the above technical means, it is possible to effectively determine whether the generator speed data meets the operating grease injection speed conditions, so as to avoid grease injection when the generator speed is too fast and ensure the effectiveness of grease injection.

[0026] In this embodiment of the application, determining whether the operating time and operating time limit of the wind turbine generator set meet the speed control grease injection time condition includes:

[0027] Compare the operating time and operating time limits of wind turbine generator sets;

[0028] If the operating time of the wind turbine generator is greater than or equal to the operating time limit, it is determined that the speed control grease injection time condition is met; otherwise, it is determined that the grease injection condition is not met.

[0029] Based on the above technical means, it can be determined whether special grease injection is required according to the set operating time limit value, so as to ensure that the generator bearings are effectively lubricated and avoid the generator not being greased for a long time, causing the bearings to run dry and affecting the service life.

[0030] In this embodiment of the application, the calculation of the current required grease injection time based on the benchmark parameters and the operating time of the wind turbine generator set includes:

[0031] The required grease injection time t is calculated based on the grease injection cycle, grease injection duration, and the operating time of the wind turbine generator set: t = T / T0*t0, where T is the operating time of the wind turbine generator set, T0 is the grease injection cycle, and t0 is the grease injection duration.

[0032] Based on the above technical means, the current grease injection time can be calculated according to the operating time of the wind turbine generator set. With the parameters of the generator's automatic lubrication system remaining unchanged, the amount of grease injected per unit time is fixed. The lubrication requirements of the bearing can be guaranteed based on the calculated current grease injection time.

[0033] In this embodiment of the application, the method further includes:

[0034] Under the condition of meeting the speed control grease injection time requirements, the wind turbine generator set is controlled to operate within the speed range that meets the grease injection speed requirements before grease injection begins according to the current required grease injection time, until the grease injection reaches the current required grease injection time, and the wind turbine generator set is controlled to operate normally.

[0035] Based on the above technical means, by controlling the speed of the wind turbine generator to achieve the operating grease injection conditions, the lubrication requirements of the bearings can be guaranteed, and the continuous operation and power generation of the wind turbine generator can also be guaranteed.

[0036] In this embodiment of the application, if the conditions for grease injection duration and grease injection speed are met, the grease injection speed condition is continuously determined during the grease injection process.

[0037] If the conditions are not met, stop the grease injection and record the grease injection time, then proceed to S2;

[0038] When the grease injection conditions are met again, the current required grease injection time t is calculated based on the grease injection cycle, grease injection duration, grease injection time, and the operating time of the wind turbine generator set: t = T / T0*t0-t1, where T is the operating time of the wind turbine generator set, T0 is the grease injection cycle, t0 is the grease injection duration, and t1 is the grease injection time.

[0039] Based on the above technical means, during the grease injection process, the generator speed data is used to determine whether the operating grease injection speed conditions are met in real time. Grease injection is always performed when the operating grease injection speed conditions are met, ensuring that the grease can smoothly enter the bearing and play a role in bearing lubrication.

[0040] A second aspect of this application provides an automatic lubrication control system for a wind turbine generator set, the automatic lubrication control system for the wind turbine generator set comprising:

[0041] A speed sensor is used to collect generator speed data;

[0042] Control unit, used for:

[0043] Set the automatic lubrication reference parameters for the generator, including the grease injection cycle, grease injection duration, speed threshold, and operating time limit;

[0044] Collect data on the operating time of wind turbine generator sets;

[0045] Based on the wind turbine generator set running time, generator speed data, and the reference parameters, determine whether the grease injection conditions are met; if the grease injection conditions are met, calculate the current grease injection time based on the reference parameters and the wind turbine generator set running time; control the generator automatic lubrication system to perform grease injection according to the current grease injection time; if the grease injection conditions are not met, continuously collect the wind turbine generator set running time until the grease injection conditions are met.

[0046] The generator's automatic lubrication system is used to apply grease according to the current required grease interval.

[0047] Based on the above technical means, the system can set the grease injection cycle and grease injection time as a standard for grease injection. At the same time, the amount of grease injected is determined according to the generator's running time to ensure the lubrication requirements of the bearings. The generator speed during grease injection is also taken into account to ensure the effectiveness of grease injection, so that the generator can fully lubricate the bearings after grease injection.

[0048] A third aspect of this application provides a machine-readable storage medium storing instructions for causing a machine to perform the aforementioned automatic lubrication control method for a wind turbine generator.

[0049] Through the above technical solution, this method determines the amount of grease to be injected into the generator based on the unit's operating time. By collecting the generator speed, it can avoid injecting grease when the generator speed is too high, thus ensuring the effectiveness of grease injection. Furthermore, by changing the amount of grease injected into the generator based on the cumulative operating time of the computer group, it ensures the lubrication requirements of the bearings.

[0050] This solution ensures the effectiveness of bearing grease injection by properly applying grease to the bearings, reducing the probability of bearing failure and improving the operational reliability and stability of the unit.

[0051] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0052] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. In the drawings:

[0053] Figure 1 This is a flowchart of an automatic lubrication control method for a wind turbine generator provided in one embodiment of this application;

[0054] Figure 2 This is a block diagram of an automatic lubrication control system for a wind turbine generator provided in one embodiment of this application;

[0055] Figure 3 This is a flowchart illustrating the automatic lubrication control method for a wind turbine generator set according to one embodiment of this application. Detailed Implementation

[0056] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0057] Figure 1 This is a flowchart of an automatic lubrication control method for a wind turbine generator provided in one embodiment of this application. Figure 1 As shown, the method includes:

[0058] S1: Set the automatic lubrication reference parameters for the generator. These parameters include the grease injection cycle, grease injection duration, speed threshold, and operating time limit. In this embodiment, since the settings of the generator's automatic lubrication system remain unchanged, the grease injection duration is used to characterize the amount of grease injected. The grease injection cycle is the time interval between two grease injections under normal circumstances.

[0059] S2: Collect wind turbine generator running time and generator speed data. In this embodiment, the wind turbine generator running time can be collected by the control unit, and the generator speed data can be collected by the speed sensor.

[0060] S3: Determine whether the grease injection conditions are met based on the wind turbine generator running time, generator speed data and the reference parameters. If yes, proceed to S4; otherwise, jump to S2.

[0061] In this embodiment of the application, determining whether the grease injection conditions are met based on the operating time of the wind turbine generator set and the reference parameters includes:

[0062] The system determines whether the operating grease injection time requirement is met based on the wind turbine generator's operating time, grease injection cycle, and operating time limit. In this embodiment, firstly, the operating time, grease injection cycle, and operating time limit are compared. If the operating time is greater than or equal to the grease injection cycle and less than the operating time limit, the operating grease injection time requirement is met; otherwise, it is not. Using the above technical means, it is possible to effectively determine whether the current operating time of the wind turbine generator meets the operating grease injection time requirement.

[0063] If the grease injection duration condition is met, the grease injection speed condition is determined based on the speed threshold and generator speed data. In this embodiment, firstly, the average speed over a preset unit time is calculated based on the generator speed data; the average speed is compared with the corresponding speed threshold; if the average speed is less than or equal to the corresponding speed threshold, the grease injection speed condition is met; otherwise, the grease injection speed condition is not met. Using the above technical means, it is possible to effectively determine whether the generator speed data meets the grease injection speed condition, thus avoiding grease injection when the generator speed is too high and ensuring the effectiveness of grease injection.

[0064] If the grease injection speed condition is met, then the grease injection condition is confirmed to be met, and the grease injection is determined to be in progress.

[0065] If the operating grease injection time condition is not met, the speed control grease injection time condition is determined based on the operating grease injection time condition value. In this embodiment, the operating time of the wind turbine generator set and the operating time limit value are compared first. If the operating time of the wind turbine generator set is greater than or equal to the operating time limit value, the speed control grease injection time condition is met; otherwise, the grease injection condition is not met.

[0066] Based on the above technical means, it can be determined whether special grease injection is required according to the set operating time limit value, so as to ensure that the generator bearings are effectively lubricated and avoid the generator not being greased for a long time, causing the bearings to run dry and affecting the service life.

[0067] If the controlled-rate grease injection duration condition is met, then the current grease injection condition is determined to be met, and controlled-rate grease injection is determined.

[0068] S4: Under the condition that the grease injection conditions are met, calculate the current required grease injection time based on the benchmark parameters and the operating time of the wind turbine generator set. In this embodiment of the application, calculating the current required grease injection time based on the benchmark parameters and the operating time of the wind turbine generator set includes:

[0069] The required grease injection time t is calculated based on the grease injection cycle, grease injection duration, and the operating time of the wind turbine generator set: t = T / T0*t0, where T is the operating time of the wind turbine generator set, T0 is the grease injection cycle, and t0 is the grease injection duration.

[0070] Based on the aforementioned technical methods, the current required grease injection time can be calculated according to the operating time of the wind turbine generator. With the parameters of the generator's automatic lubrication system remaining constant, the amount of grease injected per unit time is fixed. The calculated current required grease injection time ensures the lubrication needs of the bearings. The calculation method for the required grease injection time during speed-controlled grease injection and during operation is the same.

[0071] S5: Controls the generator's automatic lubrication system to perform grease injection according to the current required grease injection time.

[0072] Based on the above technical means, the grease injection cycle and grease injection time are set as the standard for grease injection. At the same time, the amount of grease is determined according to the generator's running time to ensure the lubrication requirements of the bearings. The generator speed during grease injection is also taken into account to ensure the effectiveness of grease injection, so that the generator can fully lubricate the bearings after grease injection.

[0073] It should be noted that if speed-controlled grease injection is determined, the wind turbine generator set must be controlled to operate within the speed range that meets the grease injection speed conditions before the grease injection begins according to the current required grease injection time, until the current required grease injection time is reached, and then the wind turbine generator set is controlled to operate normally.

[0074] Based on the above technical means, by controlling the speed of the wind turbine generator to achieve the operating grease injection conditions, the lubrication requirements of the bearings can be guaranteed, and the continuous operation and power generation of the wind turbine generator can also be guaranteed.

[0075] In other embodiments of this application, if the conditions for grease injection duration and grease injection speed are met, the grease injection speed condition is continuously determined during the grease injection process.

[0076] If the conditions are not met, stop the grease injection and record the grease injection time, then proceed to step S2;

[0077] When the grease injection conditions are met again, the current required grease injection time t is calculated based on the grease injection cycle, grease injection duration, grease injection time, and the operating time of the wind turbine generator set: t = T / T0*t0-t1, where T is the operating time of the wind turbine generator set, T0 is the grease injection cycle, t0 is the grease injection duration, and t1 is the grease injection time.

[0078] Based on the above technical means, during the grease injection process, the generator speed data is used to determine whether the operating grease injection speed conditions are met in real time. Grease injection is always performed when the operating grease injection speed conditions are met, ensuring that the grease can smoothly enter the bearing and play a role in bearing lubrication.

[0079] In some other embodiments, the corresponding wind turbine runtime can be calculated in reverse based on the grease injection time, and the calculated wind turbine runtime can be subtracted from the recorded wind turbine runtime, and the current grease injection time can be calculated based on the difference.

[0080] The second aspect of this application provides an automatic lubrication control system for a wind turbine generator set, such as... Figure 2 As shown, the automatic lubrication control system for the wind turbine generator includes:

[0081] A speed sensor is used to collect generator speed data;

[0082] The control unit is used to set automatic lubrication reference parameters for the generator, including grease injection cycle, grease injection duration, speed threshold, and operating time limit; collect the operating time of the wind turbine generator set; determine whether the grease injection conditions are met based on the operating time of the wind turbine generator set, the generator speed data, and the reference parameters; if the grease injection conditions are met, calculate the current required grease injection time based on the reference parameters and the operating time of the wind turbine generator set; control the automatic lubrication system of the generator to perform grease injection according to the current required grease injection time; if the grease injection conditions are not met, continuously collect the operating time of the wind turbine generator set until the grease injection conditions are met.

[0083] The generator's automatic lubrication system is used to apply grease according to the current required grease interval.

[0084] In this embodiment, the control unit includes electrical components such as a PLC, power distribution components, and industrial control components. The power distribution components provide power to the control system and the automatic lubrication system. The control system collects generator speed data and calculates generator operating time, then outputs control signals based on logical judgments of the collected data. The industrial control components execute the control signals to control the start and stop of the lubrication pump in the generator's automatic lubrication system, thereby controlling the grease injection time and amount.

[0085] Speed ​​sensors come in various forms, including encoders or proximity switch speed measuring devices mounted at the rear of the generator. They are used to monitor generator speed data in real time and upload the data to the control unit.

[0086] The generator automatic lubrication system includes a lubrication pump and related oil pipelines. When the power is on, the automatic lubrication system starts to inject grease into the bearings, and stops injecting grease when the power is off. The amount of grease injected is changed by the different power-on times of the lubrication pump.

[0087] Based on the above technical means, the system can set the grease injection cycle and grease injection time as a standard for grease injection. At the same time, the amount of grease injected is determined according to the generator's running time to ensure the lubrication requirements of the bearings. The generator speed during grease injection is also taken into account to ensure the effectiveness of grease injection, so that the generator can fully lubricate the bearings after grease injection.

[0088] The method of this application will be illustrated below with a specific example.

[0089] First, set the baseline parameters for the generator's automatic lubrication: the grease injection cycle is set to 1000 minutes, the grease injection duration to 100 seconds, the speed threshold to n0, and the operating time limit to t. max .

[0090] like Figure 3 As shown, after the wind turbine generator set starts running, it begins to collect data on the wind turbine generator set's running time and generator speed. Based on the collected wind turbine generator set running time, it is determined whether the grease injection time condition is met. If it is met, the generator enters the pre-grease injection state. Then, based on the collected generator speed data, the average speed per unit time is calculated. In this embodiment, the average speed n1 is calculated for 1 minute. When n1 ≤ n0, the grease injection speed condition is met, and the generator speed is considered low enough to meet the grease injection requirements. Based on the grease injection cycle, grease injection duration, and the wind turbine generator set's running time, the current required grease injection time is calculated. The control unit sends a control signal, the generator lubrication pump is energized to perform grease injection, until the grease injection time is reached, the control unit sends a control signal, the generator lubrication pump is de-energized to stop grease injection, the generator exits the pre-grease injection state, and the control unit restarts the timer.

[0091] During the grease injection process, the average speed within a preset unit time is calculated in real time based on the collected generator speed data, and it is determined whether the grease injection speed condition is met. If not, even if the grease injection time has not reached the calculated current required grease injection time, the control unit will send a control signal to de-energize the generator lubrication pump and stop grease injection. At the same time, it will continue to collect the wind turbine generator running time and generator speed data until n1≤n0, and then perform grease injection again. The time for the second grease injection is the grease injection time calculated based on the cumulative running time of the unit minus the grease injection time. For example, if the unit runs for 1000 minutes, grease injection is performed for 50 seconds and then stopped, and the unit runs for another 500 minutes and the grease injection condition is met, then the second grease injection time is (1000+500) / 1000*100s-50s=100s.

[0092] In some cases, the operating speed conditions for lubrication cannot be met. In this case, it is necessary to determine whether the operating time of the wind turbine is greater than or equal to the operating time limit based on the operating time of the wind turbine. If so, speed-controlled lubrication is required. The control unit issues a speed control command to make the unit operate within the speed range that meets the operating speed conditions for lubrication until the lubrication time reaches the calculated required lubrication time, and then controls the wind turbine to operate normally.

[0093] A third aspect of this application provides a machine-readable storage medium storing instructions for causing a machine to perform the aforementioned automatic lubrication control method for a wind turbine generator.

[0094] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a microcontroller, chip, or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0095] The optional embodiments of this application have been described in detail above with reference to the accompanying drawings. However, the embodiments of this application are not limited to the specific details described above. Within the scope of the technical concept of the embodiments of this application, various simple modifications can be made to the technical solutions of the embodiments of this application, and these simple modifications all fall within the protection scope of the embodiments of this application. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of this application will not describe the various possible combinations separately.

[0096] Furthermore, various different implementations of this application can be combined arbitrarily, as long as they do not violate the spirit of the implementation of this application, they should also be regarded as the content disclosed in the implementation of this application.

Claims

1. An automatic lubrication control method for a wind turbine generator set, characterized in that, The automatic lubrication control method for wind turbine generator sets includes: S1: Set the automatic lubrication reference parameters for the generator, including the grease injection cycle, grease injection duration, speed threshold, and operating time limit; S2: Collect data on wind turbine generator running time and generator speed; S3: Determine whether the grease injection conditions are met based on the wind turbine generator set running time, generator speed data and the reference parameters. If yes, proceed to S4; otherwise, jump to S2. S4: If the grease injection conditions are met, calculate the current grease injection time based on the benchmark parameters and the operating time of the wind turbine generator set; S5: Controls the generator's automatic lubrication system to perform grease injection according to the current required grease injection time; Determining whether the grease injection conditions are met based on the wind turbine generator's operating time and the baseline parameters includes: Compare the operating time, grease injection cycle, and operating time limit of wind turbine generator sets; If the operating time of the wind turbine generator is greater than or equal to the grease injection cycle, but less than the operating time limit, then the operating grease injection time condition is met. If the grease injection time condition is met, the grease injection speed condition is determined based on the speed threshold and generator speed data. If the grease injection speed condition is met, the grease injection condition is determined to be met. If the operating time of the wind turbine generator is greater than or equal to the operating time limit, it is determined that the speed control grease injection time condition is met, and the grease injection condition is confirmed to be met. Under the condition of meeting the speed control grease injection time requirements, the wind turbine generator set is controlled to operate within the speed range that meets the grease injection speed requirements before grease injection begins according to the current required grease injection time, until the grease injection reaches the current required grease injection time, and the wind turbine generator set is controlled to operate normally. Determining whether the operating grease injection speed conditions are met based on the aforementioned speed threshold and generator speed data includes: Calculate the average speed per unit time based on the generator speed data; Compare the average rotational speed with the corresponding rotational speed threshold; If the average rotational speed is less than or equal to the corresponding rotational speed threshold, the operating grease injection speed condition is determined to be met; otherwise, the operating grease injection speed condition is determined not to be met.

2. The automatic lubrication control method for wind turbine generators according to claim 1, characterized in that, The current required grease injection time is calculated based on the aforementioned baseline parameters and the operating time of the wind turbine generator set, including: The current required grease injection time t is calculated based on the grease injection cycle, grease injection duration, and the operating time of the wind turbine generator set: t = T / T0*t0; Where T is the operating time of the wind turbine generator, T0 is the grease injection cycle, and t0 is the grease injection duration.

3. The automatic lubrication control method for wind turbine generators according to claim 1, characterized in that, Under the condition that the grease injection time and grease injection speed conditions are met, during the grease injection process, it is continuously judged whether the grease injection speed conditions are met. If the conditions are not met, stop the grease injection and record the grease injection time, then proceed to S2; When the grease injection conditions are met again, the current grease injection time t is calculated based on the grease injection cycle, grease injection duration, grease injection time, and the operating time of the wind turbine generator set: t = T / T0*t0-t1; Where T is the operating time of the wind turbine generator set, T0 is the grease injection cycle, t0 is the grease injection duration, and t1 is the time since grease injection.

4. An automatic lubrication control system for a wind turbine generator set, characterized in that, The automatic lubrication control system for the wind turbine generator set includes: A speed sensor is used to collect generator speed data; Control unit, used for: Set the automatic lubrication reference parameters for the generator, including the grease injection cycle, grease injection duration, speed threshold, and operating time limit; Collect data on the operating time of wind turbine generator sets; Based on the wind turbine generator set running time, generator speed data, and the reference parameters, determine whether the grease injection conditions are met; if the grease injection conditions are met, calculate the current grease injection time based on the reference parameters and the wind turbine generator set running time, and control the generator automatic lubrication system to perform grease injection according to the current grease injection time; if the grease injection conditions are not met, continuously collect the wind turbine generator set running time until the grease injection conditions are met. The generator's automatic lubrication system is used to apply grease according to the current required grease interval. Determining whether the grease injection conditions are met based on the wind turbine generator's operating time and the baseline parameters includes: Compare the operating time, grease injection cycle, and operating time limit of wind turbine generator sets; If the operating time of the wind turbine generator is greater than or equal to the grease injection cycle, but less than the operating time limit, then the operating grease injection time condition is met. If the grease injection time condition is met, the grease injection speed condition is determined based on the speed threshold and generator speed data. If the grease injection speed condition is met, the grease injection condition is determined to be met. If the operating time of the wind turbine generator is greater than or equal to the operating time limit, it is determined that the speed control grease injection time condition is met, and the grease injection condition is confirmed to be met. Under the condition of meeting the speed control grease injection time requirements, the wind turbine generator set is controlled to operate within the speed range that meets the grease injection speed requirements before grease injection begins according to the current required grease injection time, until the grease injection reaches the current required grease injection time, and the wind turbine generator set is controlled to operate normally. Determining whether the operating grease injection speed conditions are met based on the aforementioned speed threshold and generator speed data includes: Calculate the average speed per unit time based on the generator speed data; Compare the average rotational speed with the corresponding rotational speed threshold; If the average rotational speed is less than or equal to the corresponding rotational speed threshold, the operating grease injection speed condition is determined to be met; otherwise, the operating grease injection speed condition is determined not to be met.

5. A machine-readable storage medium storing instructions for causing a machine to perform the automatic lubrication control method for a wind turbine generator as described in any one of claims 1-3.

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