Wind turbine generator overspeed shutdown control method and device, storage medium and electronic equipment

Abstract

The invention discloses a wind turbine generator overspeed shutdown control method and device, a storage medium and electronic equipment. The wind turbine generator overspeed shutdown control method comprises the steps that the high-speed shaft real-time torque of a high-speed shaft of a wind turbine generator is obtained in real time; if the wind turbine generator triggers the overspeed shutdown fault signal, the blade angle is controlled in a two-stage variable-pitch mode till the blade angle reaches a preset safety angle value; and adjusting a torque given value of the generator according to the blade angle and the real-time torque of the high-speed shaft. By implementing the method, the blade angle is controlled and the torque given value of the generator is dynamically adjusted through the two-stage variable pitch rate, so that refined management of the load in the overspeed shutdown process of the wind turbine generator is realized, the forward and backward thrust of the tower body is effectively reduced, and the limit load of the blades and the tower body is reduced; therefore, the safety and the operation stability of the high-capacity wind turbine generator are improved, and the service life of the generator is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation technology, and in particular to a wind turbine overspeed shutdown control method and device, a storage medium and an electronic device. BACKGROUND

[0002] In actual operation, wind turbines are affected by external factors such as terrain, climate, temperature and airflow disturbance, and are prone to have the generator speed exceeding the set protection value of the unit, thereby triggering an overspeed shutdown (N4) fault.

[0003] In the prior art, N4 shutdown is often realized by combining constant torque control with constant rate pitch control, but for large-capacity, high-tower and long-blade units, this control method cannot effectively suppress the limit load of the tower and the blade root, resulting in a shortened structural fatigue life and even a safety risk.

[0004] Therefore, how to optimize the control strategy of the wind turbine during the overspeed shutdown process to balance the pitch and torque control during the overspeed shutdown process of the unit, reduce the limit load of the tower thrust and the blade, and ensure the safe and stable shutdown of the unit. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide a wind turbine overspeed shutdown control method and device, a storage medium and an electronic device, which realizes fine management of the load during the overspeed shutdown process of the wind turbine by controlling the pitch angle through two-stage pitch rate control and dynamically adjusting the torque set value of the generator, effectively reduces the front and rear thrust of the tower, and reduces the limit load of the blade and the tower, thereby improving the safety and operational stability of large-capacity wind turbines and prolonging the service life of the unit.

[0006] The technical solution of the present application provides a wind turbine overspeed shutdown control method, comprising: real-time acquisition of the high-speed shaft real-time torque of the high-speed shaft of the wind turbine; if the wind turbine triggers an overspeed shutdown fault signal, controlling the pitch angle by using a two-stage pitch method until the pitch angle reaches a preset safety angle value; adjusting the torque set value of the generator according to the pitch angle and the high-speed shaft real-time torque.

[0007] In one of the optional technical solutions, if the wind turbine triggers an overspeed shutdown fault signal, the pitch angle is controlled by using a two-stage pitch method until the pitch angle reaches a preset safety angle value, comprising: if the wind turbine triggers an overspeed shutdown fault signal, adjusting the pitch angle at a first pitch rate; If the real-time output power of the wind turbine generator decreases to a preset power threshold, the blade angle is adjusted at a second pitch rate until the blade angle reaches a preset safety angle value, and the second pitch rate is smaller than the first pitch rate.

[0008] In one of the optional technical solutions, the adjusting the torque given value of the generator according to the blade angle and the high-speed shaft real-time torque comprises: controlling the torque given value to be consistent with the high-speed shaft real-time torque.

[0009] In one of the optional technical solutions, the adjusting the torque given value of the generator according to the blade angle and the high-speed shaft real-time torque comprises: if the blade angle reaches 90°, the torque given value is gradually reduced to 0.

[0010] The technical scheme of the application also provides a wind turbine generator overspeed shutdown control device, comprising: a torque acquisition unit configured to acquire the high-speed shaft real-time torque of the high-speed shaft of the wind turbine generator in real time; a blade angle control unit configured to, if the wind turbine generator triggers an overspeed shutdown fault signal, control the blade angle in a two-stage pitch mode until the blade angle reaches a preset safety angle value; a generator torque control unit configured to adjust the torque given value of the generator according to the blade angle and the high-speed shaft real-time torque.

[0011] In one of the optional technical solutions, the blade angle control unit comprises: a first pitch rate sub-control unit configured to, if the wind turbine generator triggers an overspeed shutdown fault signal, adjust the blade angle at a first pitch rate; a second pitch rate sub-control unit configured to, if the real-time output power of the wind turbine generator decreases to a preset power threshold, adjust the blade angle at a second pitch rate until the blade angle reaches a preset safety angle value, and the second pitch rate is smaller than the first pitch rate.

[0012] In one of the optional technical solutions, the generator torque control unit comprises: a first generator torque sub-control unit configured to control the torque given value to be consistent with the high-speed shaft real-time torque.

[0013] In one of the optional technical solutions, the generator torque control unit comprises: a second generator torque sub-control unit configured to, if the blade angle reaches 90°, control the torque given value to be gradually reduced to 0.

[0014] The technical scheme of the present application also provides a computer readable storage medium, which stores computer instructions, and when the computer executes the computer instructions, all steps of the wind turbine overspeed shutdown control method are executed.

[0015] The technical scheme of the present application also provides an electronic device, which comprises: at least one processor; and a memory in communication connection with the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the wind turbine overspeed shutdown control method as described above.

[0016] After the above technical scheme is adopted, the following beneficial effects are achieved: by acquiring the high-speed shaft real-time torque of the high-speed shaft of the wind turbine in real time, if the wind turbine triggers an overspeed shutdown fault signal, the blade angle is controlled by using a two-stage variable pitch method until the blade angle reaches a preset safety angle value, and the torque given value of the generator is adjusted according to the blade angle and the high-speed shaft real-time torque, the blade angle is controlled by using a two-stage variable pitch rate, and the torque given value of the generator is dynamically adjusted, thereby realizing fine management of the load in the overspeed shutdown process of the wind turbine, effectively reducing the front and rear thrust of the tower body, and reducing the limit load of the blade and the tower body, thereby improving the safety and operation stability of the large-capacity wind turbine, and prolonging the service life of the unit. BRIEF DESCRIPTION OF DRAWINGS

[0017] The disclosure of the present application will become more apparent from the following description with reference to the drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present application. In the drawings: Figure 1 A work flow chart of a wind turbine overspeed shutdown control method provided for an embodiment of the present application is shown in the figure; Figure 2 A work flow chart of a wind turbine overspeed shutdown control method provided for another embodiment of the present application is shown in the figure; Figure 3 A work flow chart of a wind turbine overspeed shutdown control method provided for the best embodiment of the present application is shown in the figure; Figure 4 A structural schematic diagram of a wind turbine overspeed shutdown control device provided for an embodiment of the present application is shown in the figure; Figure 5 A hardware structural schematic diagram of an electronic device for wind turbine overspeed shutdown control provided for an embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0019] It is readily understood that, based on the technical solution of this invention, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of the invention.

[0020] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0021] like Figure 1 As shown, an embodiment of the present invention provides a wind turbine overspeed shutdown control method, comprising: Step S101: Obtain the real-time torque of the high-speed shaft of the wind turbine in real time; Step S102: If the wind turbine triggers an overspeed shutdown fault signal, a two-stage pitch control method is used to control the blade angle until the blade angle reaches a preset safe angle value. Step S103: Adjust the torque setpoint of the generator according to the blade angle and the real-time torque of the high-speed shaft.

[0022] Specifically, this invention can be applied to electronic devices with processing capabilities, such as programmable logic controllers (PLCs). The wind turbine overspeed shutdown control method of this invention is applicable to doubly-fed or full-power wind turbines.

[0023] First, step S101 is executed, where a torque measuring instrument installed on the high-speed shaft side of the wind turbine is used to collect the real-time torque of the high-speed shaft. And send it to the controller; Then step S102 is performed, when the wind turbine generator is caused by strong gusts and other reasons, resulting in generator speed exceeds the preset overspeed shutdown protection (referred to as N4 fault) value, the controller receives N4 fault signal, using two-stage pitch control blade angle, until the blade angle reaches the preset safety angle value (such as 90°), for example, first with a higher pitch rate (such as 3 degrees per second) to increase the pitch angle of the blade, that is, to carry out the fast pitch, quickly reduce the energy captured from the wind of the wind wheel, thereby quickly reducing the drive torque, inhibit the further rise of the speed; then with a lower pitch rate (such as 1 degree per second) to increase the pitch angle of the blade, that is, to carry out the slow pitch, avoid the rapid change of the blade angle in the late shutdown to produce the violent reverse aerodynamic thrust, thereby effectively reducing the reverse limit load of the tower and the blade.

[0024] Meanwhile, step S103 is performed, the controller adjusts the torque given value of the generator according to the relationship between the blade angle and the high-speed shaft real-time torque The relationship between the high-speed shaft real-time torque and the torque given value satisfies the following formula: .

[0025] Wherein, is the high-speed shaft real-time torque; is the torque given value; is the inertia of the generator; is the acceleration of the generator speed.

[0026] Thus, the electromagnetic braking torque of the generator can dynamically match the mechanical torque on the transmission chain, avoiding mechanical impact caused by torque mutation, and changing the existing fixed torque control mode.

[0027] In this embodiment, by real-time acquisition of the high-speed shaft real-time torque of the wind turbine generator, if the wind turbine generator triggers an overspeed shutdown fault signal, the blade angle is controlled by using two-stage pitch, until the blade angle reaches the preset safety angle value, and the torque given value of the generator is adjusted according to the blade angle and the high-speed shaft real-time torque, the blade angle is controlled by two-stage pitch rate, and the torque given value of the generator is dynamically adjusted, realizing fine management of the load in the overspeed shutdown process of the wind turbine generator, effectively reducing the front and rear thrust of the tower, and reducing the limit load of the blade and the tower, thereby improving the safety and operation stability of the large-capacity wind turbine generator, and prolonging the service life of the unit.

[0028] In one of the embodiments, step S103 includes: If the blade angle reaches 90°, the torque given value is gradually reduced to 0.

[0029] ​​​Specifically, when the blade angle is adjusted to the safe position of 90°, the aerodynamic torque of the wind wheel tends to 0 at this time, so the real-time torque of the high-speed shaft will also gradually return to 0, and the torque given value of the generator always follows the real-time torque of the high-speed shaft , so the torque given value also gradually decreases to 0 synchronously and finally remains 0. At this time, the entire overspeed shutdown process is completed. The given torque has experienced a complete dynamic process from the moment of fault triggering, following the real-time torque of the high-speed shaft , first increasing (responding to the initial high torque), then gradually decreasing with the decrease of the aerodynamic efficiency, and finally returning to 0 safely together with the real-time torque of the high-speed shaft.

[0030] As Figure 2 shown, on the basis of the above embodiment, another embodiment of the application provides a wind turbine overspeed shutdown control method, comprising: Step S201: Real-time acquisition of the real-time torque of the high-speed shaft of the wind turbine; Step S202: If the wind turbine triggers an overspeed shutdown fault signal, adjusting the blade angle at a first pitch rate; Step S203: If the real-time output power of the wind turbine decreases to a preset power threshold, adjusting the blade angle at a second pitch rate until the blade angle reaches a preset safe angle value, and the second pitch rate is less than the first pitch rate; Step S204: Controlling the torque given value to be consistent with the real-time torque of the high-speed shaft.

[0031] Specifically, the controller executes step S201 to real-time acquire the real-time torque of the high-speed shaft; Then, step S202 is executed, when the N4 fault signal is received, the controller starts to enter the initial stage of pitch control, controls the blade angle to pitch at a first pitch rate, rapidly reduces the energy captured by the wind wheel from the wind, thereby rapidly reducing the driving torque and suppressing the further increase of the rotating speed; Then, step S203 is executed, with the rapid increase of the blade angle, the aerodynamic efficiency of the wind wheel decreases significantly, causing the output power of the wind turbine and the rotating speed of the generator to start to fall, and the controller enters the second stage of pitch control when the real-time output power of the wind turbine decreases to a preset power threshold, controls the blade angle to pitch at a second pitch rate, thereby avoiding the generation of intense reverse aerodynamic thrust due to the too fast change of the blade angle in the later stage of shutdown, and effectively reducing the reverse limit load of the tower and the blade; ​Simultaneously executing step S204, whether in the initial or second stage of pitch control, the controller's control torque setpoint always remains consistent with the real-time torque of the high-speed shaft. This ensures that the electromagnetic torque can smoothly adapt to changes in mechanical torque throughout the entire deceleration process, thereby enabling the generator's electromagnetic braking torque to dynamically match the mechanical torque on the transmission chain. This avoids mechanical shocks caused by sudden torque changes and changes the existing fixed torque control method.

[0032] Preferably, the first pitch rate is 3° / s-5° / s, and the second pitch rate is 1° / s-2.5° / s.

[0033] Preferably, the preset power threshold is less than or equal to 10kW.

[0034] In this embodiment, a two-stage pitch control method of "fast first, slow later" is adopted. In the initial stage of shutdown, a high-speed pitch reduction is carried out using the first pitch rate, which can quickly reduce the aerodynamic efficiency of the blades, effectively curb the continuous increase of the speed, and control the energy input of the wind turbine. After the real-time output power of the wind turbine is reduced to a preset power threshold, the second pitch rate is switched to slow pitch reduction, which avoids the generation of reverse thrust peaks due to excessively rapid changes in blade angle, thereby significantly reducing the ultimate load on the tower and blades. At the same time, during the two-stage pitch control process, the torque setpoint of the generator is kept consistent with the real-time torque of the high-speed shaft, ensuring that the electromagnetic torque can dynamically match the mechanical torque on the transmission chain throughout the deceleration process, smoothly adapting to changes in mechanical torque and avoiding mechanical shocks caused by sudden torque changes.

[0035] like Figure 3 As shown, the preferred embodiment of the present invention provides a wind turbine overspeed shutdown control method, comprising: Step S301: Obtain the real-time torque of the high-speed shaft of the wind turbine in real time; Step S302: Determine whether an overspeed shutdown fault signal has been received; Step S303: Adjust the blade angle at the first pitch rate; Step S304: Determine whether the real-time output power of the wind turbine has dropped to a preset power threshold; Step S305: Adjust the blade angle at the second pitch rate; Step S306: Determine whether the blade angle reaches 90°; Step S307: Gradually reduce the control torque setpoint to 0.

[0036] Specifically, in step S302, it is determined whether an overspeed shutdown fault signal is received. If so, steps S303-S304 are executed; otherwise, step S301 is executed to continue monitoring the real-time torque of the high-speed shaft. In step S304, it is determined whether the real-time output power of the wind turbine has dropped to a preset power threshold. If so, steps S305-S306 are executed; otherwise, step S303 is executed. In step S306, it is determined whether the blade angle has reached 90°. If so, step S307 is executed; otherwise, step S305 is executed.

[0037] In this embodiment, a two-stage pitch control method of "fast first, slow later" is adopted. In the initial stage of shutdown, a high-speed pitch reduction is carried out using the first pitch rate, which can quickly reduce the aerodynamic efficiency of the blades, effectively curb the continuous increase of the speed, and control the energy input of the wind turbine. After the real-time output power of the wind turbine is reduced to a preset power threshold, the second pitch rate is switched to slow pitch reduction, which avoids the generation of reverse thrust peaks due to excessively rapid changes in blade angle, thereby significantly reducing the ultimate load on the tower and blades. At the same time, during the two-stage pitch control process, the torque setpoint of the generator is kept consistent with the real-time torque of the high-speed shaft, ensuring that the electromagnetic torque can dynamically match the mechanical torque on the transmission chain throughout the deceleration process, smoothly adapting to changes in mechanical torque and avoiding mechanical shocks caused by sudden torque changes.

[0038] like Figure 4 As shown, an embodiment of the present invention provides a wind turbine overspeed shutdown control device, comprising: The torque acquisition unit 401 is used to acquire the real-time torque of the high-speed shaft of the wind turbine in real time. The blade angle control unit 402 is used to control the blade angle in a two-stage pitch control method if the wind turbine triggers an overspeed shutdown fault signal, until the blade angle reaches a preset safe angle value. The generator torque control unit 403 is used to adjust the generator torque setpoint according to the blade angle and the real-time torque of the high-speed shaft.

[0039] Specifically, the wind turbine overspeed shutdown control device of the present invention is applicable to doubly fed or full-power wind turbines.

[0040] The wind turbine overspeed shutdown control device provided in this embodiment mainly includes a torque acquisition unit 401, a blade angle control unit 402, and a generator torque control unit 403.

[0041] The torque acquisition unit 401 acquires the real-time torque of the high-speed shaft through a torque measuring instrument installed on the high-speed shaft side of the wind turbine. And send it to the controller; When the wind turbine generator speed exceeds the preset overspeed shutdown (N4) protection setting due to strong gusts or other reasons, the blade angle control unit 402 receives the N4 fault signal and uses a two-stage pitch control method to control the blade angle until the blade angle reaches the preset safe angle value (such as 90°). For example, first, the pitch angle of the blade is rapidly increased at a high pitch rate (such as 3 degrees / second), which is to quickly retract the blade and rapidly reduce the energy captured by the wind turbine from the wind, thereby rapidly reducing the drive torque and suppressing further increase in speed. Then, the pitch angle of the blade is increased at a low pitch rate (such as 1 degree / second), which is to slowly retract the blade and avoid generating severe reverse aerodynamic thrust due to excessively rapid changes in blade angle in the later stage of shutdown, thereby effectively reducing the reverse ultimate load of the tower and blades.

[0042] Meanwhile, the generator torque control unit 403 adjusts the real-time torque based on the blade angle and the high-speed shaft torque. Real-time adjustment of generator torque setpoint Real-time torque of high-speed shaft With torque setpoint The relationship satisfies the following formula: .

[0043] in, This refers to the real-time torque of the high-speed shaft. The torque is given; The moment of inertia of the generator; This is the acceleration of the generator's rotational speed.

[0044] This allows the electromagnetic braking torque of the generator to dynamically match the mechanical torque on the transmission chain, avoiding mechanical shocks caused by sudden torque changes, and changing the existing fixed torque control method.

[0045] In this embodiment, by controlling the blade angle through two-stage pitch rate and dynamically adjusting the generator torque setpoint, the load during the overspeed shutdown of the wind turbine is precisely managed. This effectively reduces the thrust before and after the tower and decreases the ultimate load on the blades and the tower, thereby improving the safety and operational stability of the large-capacity wind turbine and extending its service life.

[0046] In one embodiment, the blade angle control unit 402 includes: The first pitch rate sub-control unit 4021 is used to adjust the blade angle at the first pitch rate if the wind turbine triggers an overspeed shutdown fault signal. The second pitch rate sub-control unit 4022 is used to adjust the blade angle at a second pitch rate if the real-time output power of the wind turbine drops to a preset power threshold, until the blade angle reaches a preset safe angle value, wherein the second pitch rate is less than the first pitch rate.

[0047] Specifically, when the first pitch rate sub-control unit 4021 receives the N4 fault signal, it enters the initial stage of pitch control, controls the blade angle to rapidly pitch at the first pitch rate, quickly reduces the energy captured by the wind turbine from the wind, thereby rapidly reducing the drive torque and suppressing further increase in speed.

[0048] As the blade angle increases rapidly, the aerodynamic efficiency of the wind turbine decreases significantly, causing the output power and generator speed of the wind turbine to begin to drop. The second pitch rate sub-control unit 4022 monitors the real-time output power of the wind turbine in real time. If the real-time output power drops to the preset power threshold, it enters the second stage of pitch control, controlling the blade angle to slowly pitch at the second pitch rate. This avoids the generation of severe reverse aerodynamic thrust due to the blade angle changing too quickly in the later stages of shutdown, thereby effectively reducing the reverse ultimate load on the tower and blades.

[0049] In one embodiment, the generator torque control unit 403 includes: The first generator torque control unit 4031 is used to control the torque setpoint to be consistent with the real-time torque of the high-speed shaft.

[0050] Specifically, whether in the initial or second stage of pitch control, the control torque setpoint of the first generator torque sub-control unit 4031 is always consistent with the real-time torque of the high-speed shaft. This ensures that the electromagnetic torque can smoothly adapt to the changes in mechanical torque throughout the deceleration process, thereby enabling the electromagnetic braking torque of the generator to dynamically match the mechanical torque on the transmission chain, avoiding mechanical shocks caused by sudden torque changes, and changing the existing fixed torque control method.

[0051] In one embodiment, the generator torque control unit 403 includes: The second generator torque control unit 4032 is used to control the torque setpoint to gradually decrease to 0 if the blade angle reaches 90°.

[0052] Specifically, the second generator torque control unit 4032 monitors the blade angle in real time. When the blade angle is adjusted to the safe position of 90°, the pitch control action is completed, and the aerodynamic torque of the wind turbine approaches 0. Therefore, the real-time torque of the high-speed shaft... It will also gradually return to 0, due to the generator's torque setpoint. Always follow the real-time torque of the high-speed shaft Therefore, the torque setpoint It also gradually decreases to 0 and eventually remains at 0. At this point, the entire overspeed shutdown process is complete. Given torque It went through a process that started from the moment the fault was triggered, following the real-time torque of the high-speed shaft. The entire dynamic process involves the torque initially increasing (to cope with the high initial torque), then gradually decreasing as aerodynamic efficiency declines, ultimately aligning with the real-time torque of the high-speed shaft. Together, we safely returned to zero.

[0053] One embodiment of the present invention provides a computer-readable storage medium for storing computer instructions, which, when executed by a computer, are used to perform all steps of the wind turbine overspeed shutdown control method as described in any of the above method embodiments.

[0054] like Figure 5 As shown, a hardware structure diagram of an electronic device for overspeed shutdown control of a wind turbine generator provided in an embodiment of the present invention includes: At least one processor 501; and, Memory 502 is communicatively connected to at least one processor 501; wherein, The memory 502 stores instructions that can be executed by at least one processor 501, which enables the at least one processor 501 to perform the wind turbine overspeed shutdown control method as described in any of the above method embodiments.

[0055] Figure 5 Take a processor 501 as an example.

[0056] The electronic device is preferably a programmable logic controller (PLC).

[0057] The electronic device may also include an input device 503 and an output device 504.

[0058] The processor 501, memory 502, input device 503 and output device 504 can be connected by a bus or other means. The figure shows an example of connection by bus.

[0059] The memory 502, as a non-volatile computer-readable storage medium, can be used to obtain non-volatile software programs, non-volatile computer-executable programs, and modules, such as the program instructions / modules corresponding to the wind turbine overspeed shutdown control method in the embodiments of this application, for example, Figures 1-3The method flow is shown. The processor 501 executes various functional applications and data processing by running non-volatile software programs, instructions, and modules acquired in the memory 502, thereby realizing the wind turbine overspeed shutdown control method in the above embodiment.

[0060] The memory 502 may include a program acquisition area and a data acquisition area. The program acquisition area may acquire the operating system and applications required for at least one function; the data acquisition area may acquire data created based on the use of the wind turbine overspeed shutdown control method. Furthermore, the memory 502 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 502 may optionally include memory remotely located relative to the processor 501, and these remote memories may be connected via a network to the apparatus performing the wind turbine overspeed shutdown control method. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0061] The input device 503 can receive user clicks and generate signal inputs related to user settings and function control of the wind turbine overspeed shutdown control method. The output device 504 may include display devices such as a display screen.

[0062] When the one or more modules are accessed in the memory 502 and are run by the one or more processors 501, the wind turbine overspeed shutdown control method in any of the above method embodiments is executed.

[0063] The above-described product can perform the methods provided in the embodiments of this application, and has the corresponding functional modules and beneficial effects for performing the methods. Technical details not described in detail in this embodiment can be found in the methods provided in the embodiments of this application.

[0064] The above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and are not intended to limit them. Although the embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling overspeed shutdown of a wind turbine generator set, characterized in that, include: Real-time acquisition of the high-speed shaft torque of the wind turbine; If the wind turbine triggers an overspeed shutdown fault signal, a two-stage pitch control method is used to control the blade angle until the blade angle reaches a preset safe angle value. The generator torque setpoint is adjusted based on the blade angle and the real-time torque of the high-speed shaft.

2. The wind turbine overspeed shutdown control method as described in claim 1, characterized in that, If the wind turbine triggers an overspeed shutdown fault signal, a two-stage pitch control method is used to control the blade angle until the blade angle reaches a preset safe angle value, including: If the wind turbine triggers an overspeed shutdown fault signal, the blade angle is adjusted at the first pitch rate. If the real-time output power of the wind turbine drops to a preset power threshold, the blade angle is adjusted at a second pitch rate until the blade angle reaches a preset safe angle value, wherein the second pitch rate is less than the first pitch rate.

3. The wind turbine overspeed shutdown control method as described in claim 2, characterized in that, The step of adjusting the generator's torque setpoint based on the blade angle and the real-time torque of the high-speed shaft includes: The torque setpoint is controlled to be consistent with the real-time torque of the high-speed shaft.

4. The wind turbine overspeed shutdown control method as described in claim 1, characterized in that, The step of adjusting the generator's torque setpoint based on the blade angle and the real-time torque of the high-speed shaft includes: If the blade angle reaches 90°, the torque setpoint is gradually reduced to 0.

5. A wind turbine overspeed shutdown control device, characterized in that, include: The torque acquisition unit is used to acquire the real-time torque of the high-speed shaft of the wind turbine. The blade angle control unit is used to control the blade angle in a two-stage pitch control method if the wind turbine triggers an overspeed shutdown fault signal, until the blade angle reaches a preset safe angle value. The generator torque control unit is used to adjust the generator torque setpoint based on the blade angle and the real-time torque of the high-speed shaft.

6. The wind turbine overspeed shutdown control device as described in claim 5, characterized in that, The blade angle control unit includes: The first pitch rate sub-control unit is used to adjust the blade angle at the first pitch rate if the wind turbine triggers an overspeed shutdown fault signal. The second pitch rate sub-control unit is used to adjust the blade angle at a second pitch rate if the real-time output power of the wind turbine drops to a preset power threshold, until the blade angle reaches a preset safe angle value, wherein the second pitch rate is less than the first pitch rate.

7. The wind turbine overspeed shutdown control device as described in claim 6, characterized in that, The generator torque control unit includes: The first generator torque sub-control unit is used to control the torque setpoint to be consistent with the real-time torque of the high-speed shaft.

8. The wind turbine overspeed shutdown control device as described in claim 5, characterized in that, The generator torque control unit includes: The second generator torque control unit is used to control the torque setpoint to gradually decrease to 0 if the blade angle reaches 90°.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions, which, when executed by a computer, are used to perform all the steps of the wind turbine overspeed shutdown control method as described in any one of claims 1-4.

10. An electronic device, characterized in that, include: At least one processor; as well as, A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, which, when executed by the at least one processor, enables the at least one processor to perform the wind turbine overspeed shutdown control method as described in any one of claims 1-4.

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