Method of controlling a wind turbine, controller and wind turbine

Abstract

Disclosed are a wind turbine generator control method, a wind turbine generator controller and a wind turbine generator. The wind turbine generator control method comprises: obtaining a generator speed during operation of the wind turbine generator; determining a generator torque upper limit value corresponding to the obtained generator speed based on a pre-determined generator speed-torque mapping table reflecting the generator speed and the generator torque upper limit value, wherein the generator speed-torque mapping table is obtained by testing the wind turbine generator under multiple operating conditions; and limiting a preset operating parameter of the wind turbine generator based on the determined generator torque upper limit value. The wind turbine generator control method, the wind turbine generator controller and the wind turbine generator can adjust the generator torque upper limit in real time according to the actual operating conditions of the wind turbine generator, thereby improving the operating safety of the wind turbine generator.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of wind power generation in general, and more particularly, to a control method of a wind turbine generator system, a controller and a wind turbine generator system. BACKGROUND

[0002] At present, in order to realize the safe operation of the wind turbine generator system, an uppermost torque limit is usually set for the amplitude upper limit of the generator torque. By setting the uppermost torque limit, the wind turbine generator system can be prevented from operating in a limit overload condition, and the operation safety of the wind turbine generator system is improved.

[0003] However, only setting one uppermost torque limit cannot effectively protect other conditions in which the amplitude of the generator torque needs to be limited, except for the limit overload condition. For example, when the wind turbine generator system operates in a low-speed condition, if the generator torque is not limited to a certain extent, the control oscillation of the wind turbine generator system may be unstable, and when the wind turbine generator system operates in an overspeed condition, if the generator torque is not limited to a certain extent, the on-grid power of the wind turbine generator system may be overloaded. The occurrence of such oscillation instability and on-grid power overload conditions has a great impact on the safe operation of the wind turbine generator system. In other words, the existing method of setting the uppermost torque limit for the wind turbine generator system can only protect the limit condition, and cannot protect the entire operating condition of the wind turbine generator system, which seriously affects the safe operation of the wind turbine generator system. On the other hand, in order to set the uppermost torque limit, the commonly used design method at present is to design according to the capability boundary of the electrical circuit of the wind turbine generator system, which cannot effectively combine the capability boundary of the mechanical components for design, and therefore a single torque upper limit / lower limit is used, which is prone to overdesign. SUMMARY

[0004] Therefore, embodiments of the present disclosure provide a control method of a wind turbine generator system, a controller and a wind turbine generator system, which can adjust the generator torque upper limit in real time according to the actual operating condition of the wind turbine generator system, and improve the operation safety of the wind turbine generator system.

[0005] In one general aspect, there is provided a control method of a wind turbine generator system, the control method comprising: obtaining a generator speed during operation of the wind turbine generator system; determining a generator torque upper limit value corresponding to the obtained generator speed based on a pre-determined generator speed-torque mapping table reflecting the generator speed and the generator torque upper limit value, wherein the generator speed-torque mapping table is obtained by testing the wind turbine generator system under a plurality of operating conditions; and limiting a preset operating parameter of the wind turbine generator system based on the determined generator torque upper limit value.

[0006] In another general aspect, there is provided a computer readable storage medium storing a computer program which, when executed by a processor, implements the method of controlling a wind turbine as described above.

[0007] In another general aspect, there is provided a controller comprising: a processor; and a memory storing a computer program which, when executed by the processor, implements the method of controlling a wind turbine as described above.

[0008] In another general aspect, there is provided a wind turbine comprising the controller as described above.

[0009] The method of controlling a wind turbine, the controller and the wind turbine according to embodiments of the present disclosure can realize effective protection of the entire operating condition of the wind turbine (including the low-speed large-torque operating condition or the overspeed large-torque operating condition) by adjusting the generator torque upper limit in real time according to the actual operating condition of the wind turbine, and protect the wind turbine in advance in the extreme operating condition, thereby improving the safe operation reliability of the wind turbine. In addition, the method of controlling a wind turbine, the controller and the wind turbine according to embodiments of the present disclosure can effectively avoid overdesign, reduce the control cost of the wind turbine, and will not increase the hardware cost of the wind turbine, facilitating popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0010] The above and other objects and features of the present disclosure will become more apparent from the following description made with reference to the accompanying drawings, in which:

[0011] Figure 1 is a flowchart illustrating a method of controlling a wind turbine according to an embodiment of the present disclosure;

[0012] Figure 2 is a flowchart illustrating a method of obtaining a generator speed-torque mapping table by testing the wind turbine in a first operating condition and a second operating condition;

[0013] Figure 3 is a flowchart illustrating a method of determining a first correspondence between a generator speed and a generator torque upper limit value in a first operating condition according to an embodiment of the present disclosure;

[0014] Figure 4 is a flowchart illustrating a method of determining a second correspondence between a generator speed and a generator torque upper limit value in a second operating condition according to an embodiment of the present disclosure;

[0015] Figure 5 is a block diagram illustrating a controller according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0016] The following detailed description is presented to aid the reader in gaining a thorough understanding of the methods, apparatuses, and / or systems described herein. However, various changes, modifications, and equivalents can be used, and the

[0017] Figure 1 is a flowchart illustrating a control method of a wind power generator set according to an embodiment of the present disclosure. The control method of the wind power generator set according to the embodiment of the present disclosure can be executed by a main controller of the wind power generator set, or can be executed by other dedicated controllers provided in the wind power generator set.

[0018] Referring to Figure 1 In step S101, the generator speed during the operation of the wind power generator set is acquired. For example, the generator speed can be acquired during the rectification side of the converter of the wind power generator set is in the operation state. In other words, when acquiring the generator speed, it is only required to ensure that the rectification side of the converter of the wind power generator set is in the operation state, and it is not required to monitor whether the inversion side of the converter of the wind power generator set is in the operation state.

[0019] Next, in step S102, the generator torque upper limit value corresponding to the acquired generator speed is determined based on a predetermined generator speed-torque mapping table reflecting the generator speed and the generator torque upper limit value. Here, the generator speed-torque mapping table can be obtained by testing the wind power generator set under multiple operating conditions. Alternatively, the multiple operating conditions can include at least a first operating condition and a second operating condition, but are not limited thereto. For example, the multiple operating conditions can further include special conditions such as a blade stall condition, etc. According to the embodiment of the present disclosure, in the first operating condition, the generator speed can be greater than the grid-connected speed and less than the rated speed, and in the second operating condition, the generator speed can be greater than the rated speed and less than the maximum allowable speed. In other words, the first operating condition can correspond to a low-speed large-torque condition, and the second operating condition can correspond to an overspeed large-torque condition. The method of obtaining the generator speed-torque mapping table is described below by taking an example in which the multiple operating conditions include the first operating condition and the second operating condition.

[0020] Figure 2 is a flowchart illustrating a method of obtaining a generator speed-torque mapping table by testing a wind power generator set under a first operating condition and a second operating condition.

[0021] Reference Figure 2 In step S201, a first correspondence between the generator speed and the upper limit of the generator torque under the first operating condition is determined by performing at least one test on the wind turbine generator set under the first operating condition. In step S202, a second correspondence between the generator speed and the upper limit of the generator torque under the second operating condition is determined by performing at least one test on the wind turbine generator set under the second operating condition. Here, the tests performed on the wind turbine generator set under the first and second operating conditions may include at least one of software simulation, towing platform testing, and prototype testing. In step S203, a generator speed-torque mapping table is constructed based on the first and second correspondences. The following is a reference... Figure 3 and Figure 4 A method is described for performing at least one test on a wind turbine generator set under a first operating condition and a second operating condition to determine the correspondence between the generator speed and the upper limit of the generator torque.

[0022] Figure 3 This is a flowchart illustrating a method for determining a first correspondence between generator speed and upper limit value of generator torque under a first operating condition according to an embodiment of the present disclosure; Figure 4 This is a flowchart illustrating a method for determining a second correspondence between generator speed and upper limit value of generator torque under a second operating condition, according to an embodiment of the present disclosure.

[0023] Reference Figure 3 In step S301, the wind turbine generator set is simulated in constant speed mode under the first operating condition to determine the first upper limit value of the generator torque corresponding to each generator speed under the first operating condition. Here, the first upper limit value needs to meet the following requirement: when the generator torque is not greater than (i.e., less than or equal to) the first upper limit value, the preset operating indicators of the wind turbine generator set meet the design requirements.

[0024] According to embodiments of this disclosure, software simulation can be achieved by, for example, using PSCAD software to simulate and test the upper limit of torque at various speeds. On the other hand, the constant speed mode refers to controlling the generator speed at a stable state, maintaining the generator speed constant, and continuously increasing the given torque value of the wind turbine until the upper limit is reached. In this way, the upper limit of torque corresponding to each generator speed can be obtained. The constant speed mode is a simple control method for existing wind turbine generator sets, and will not be described in detail here.

[0025] In step S302, the second upper limit value of the generator torque corresponding to each generator speed in the first operating condition is determined by performing a platform test on the wind turbine in the constant speed mode in the first operating condition. Here, the second upper limit value needs to meet the following requirement: when the generator torque is not greater than the second upper limit value, the preset operating index of the wind turbine meets the design requirement. According to the embodiment of the present disclosure, the platform test can be realized by testing the torque upper limit at each speed on the motor physical platform.

[0026] In step S303, the third upper limit value of the generator torque corresponding to each generator speed in the first operating condition is determined by performing a prototype test on the wind turbine in the constant speed mode in the first operating condition. Here, the third upper limit value needs to meet the following requirement: when the generator torque is not greater than the third upper limit value, the preset operating index of the wind turbine meets the design requirement. According to the embodiment of the present disclosure, the prototype test can be realized by testing the torque upper limit at each speed on the wind turbine prototype in the wind farm. In steps S301 to S303, the preset operating index can include the generator speed fluctuation amplitude, the generator torque fluctuation amplitude, the output power control deviation, and / or the generator torque tracking accuracy. These indexes can be obtained by using existing sensors and / or various calculation methods, which will not be described here.

[0027] In step S304, the first corresponding relationship between the generator speed and the generator torque upper limit value in the first operating condition is determined based on the first upper limit value, the second upper limit value, and the third upper limit value of the generator torque corresponding to each generator speed in the first operating condition. Specifically, first, for any one of the generator speeds in the first operating condition, the minimum value of the first upper limit value, the second upper limit value, and the third upper limit value of the generator torque corresponding to the any one generator speed is determined as the upper limit value of the generator torque corresponding to the any one generator speed. However, the present disclosure is not limited thereto, for example, the intermediate value or the average value of the first upper limit value, the second upper limit value, and the third upper limit value can be determined as the upper limit value of the generator torque corresponding to the any one generator speed. Then, the first corresponding relationship between the generator speed and the generator torque upper limit value in the first operating condition is determined based on the upper limit value of the generator torque corresponding to each generator speed in the first operating condition.

[0028] Table 1 is a table showing the first corresponding relationship between the generator speed and the generator torque upper limit value in the first operating condition.

[0029] Table 1

[0030] Generator speed Speed value Torque upper limit value Remarks [00000 L1 ]] n1 [TECHNICAL FIELD] L1 ]] [n1 is grid-connected rotational speed] <![CDATA[N L2 ]]> [n1+Δn] [CAT L2 ]]> Δn is the test speed increment …… …… …… <![CDATA[N Li ]]> n N -Δn]]> [TECHNICAL FIELD] Li ]] n N for the rated rotational speed

[0031] Referring to Figure 4In step S401, a first upper limit value of the generator torque corresponding to each generator speed in the second operating condition is determined by software simulation of the wind turbine in the constant speed mode in the second operating condition. Here, the first upper limit value needs to satisfy the following requirement: when the generator torque is not greater than the first upper limit value, the output power of the wind turbine remains the rated power.

[0032] As described above, the software simulation can be implemented by simulation test of the torque upper limit at each speed through, for example, PSCAD software simulation. On the other hand, the constant speed mode refers to controlling the generator speed in a steady state, maintaining the generator speed unchanged, and continuously increasing the given torque value of the wind turbine until the upper limit is reached.

[0033] In step S402, a second upper limit value of the generator torque corresponding to each generator speed in the second operating condition is determined by the drag platform test of the wind turbine in the constant speed mode in the second operating condition. Here, the second upper limit value needs to satisfy the following requirement: when the generator torque is not greater than the second upper limit value, the output power of the wind turbine remains the rated power. As described above, the drag platform test can be implemented by test of the torque upper limit at each speed through the motor real drag platform.

[0034] In step S403, a third upper limit value of the generator torque corresponding to each generator speed in the second operating condition is determined by the prototype test of the wind turbine in the constant speed mode in the second operating condition. Here, the third upper limit value needs to satisfy the following requirement: when the generator torque is not greater than the third upper limit value, the output power of the wind turbine remains the rated power. As described above, the prototype test can be implemented by test of the torque upper limit at each speed through the wind turbine prototype in the wind farm.

[0035] In step S404, a second correspondence between the generator speed and the generator torque upper limit value in the second operating condition is determined based on the first upper limit value, the second upper limit value and the third upper limit value of the generator torque corresponding to each generator speed in the second operating condition. Specifically, first, for any one of the generator speeds in the second operating condition, the minimum value of the first upper limit value, the second upper limit value and the third upper limit value of the generator torque corresponding to the any one of the generator speeds can be determined as the upper limit value of the generator torque corresponding to the any one of the generator speeds. However, the present disclosure is not limited thereto, for example, the intermediate value or the average value of the first upper limit value, the second upper limit value and the third upper limit value can be determined as the upper limit value of the generator torque corresponding to the any one of the generator speeds. Then, the second correspondence between the generator speed and the generator torque upper limit value in the second operating condition can be determined based on the upper limit value of the generator torque corresponding to each generator speed in the second operating condition.

[0036] Table 2 is a table showing a second correspondence between the generator speed and the generator torque upper limit value in the second operating condition.

[0037] Table 2

[0038] Generator speed Speed value Torque upper limit value Remarks <![CDATA[N H1 ]]> n N ]]> [CAT T H1 ]]> n N for the rated rotational speed <![CDATA[N H2 ]]> n N +Δn]]> [CAT H2 ]]> Δn is the test speed increment …… …… …… <![CDATA[N Hj ]]> n M -Δn]]> [TECHNICAL FIELD] Hj ]] n M for the maximum permissible rotational speed

[0039] Based on the first correspondence shown in Table 1 and the second correspondence shown in Table 2, a generator speed-torque map can be constructed.

[0040] Referring back to Figure 1 In step S103, based on the determined generator torque upper limit value, a preset operating parameter of the wind power generator set is limited.

[0041] According to embodiments of the present disclosure, the preset operating parameter can include the generator torque and / or the output power of the wind power generator set. If the current generator torque is greater than the determined generator torque upper limit value, the generator torque can be limited to the determined generator torque upper limit value. This means that if the current generator torque is less than or equal to the determined generator torque upper limit value, the generator torque does not need to be limited to the determined generator torque upper limit value, and the current wind power generator torque can continue to be executed. On the other hand, based on the determined generator torque upper limit value, an output power upper limit value of the wind power generator set can be determined, and if the current output power of the wind power generator set is greater than the determined output power upper limit value, the output power of the wind power generator set can be limited to the determined output power upper limit value. This means that if the current output power of the wind power generator set is less than or equal to the determined output power upper limit value, the output power of the wind power generator set does not need to be limited to the determined output power upper limit value, and the current output power of the wind power generator set can continue to be output.

[0042] Figure 5 is a block diagram showing a controller according to embodiments of the present disclosure. The controller can be implemented as a main controller of a wind power generator set, or as other dedicated controllers provided in the wind power generator set.

[0043] Referring back to Figure 5The controller 500 according to an embodiment of the disclosure includes a processor 510 and a memory 520. The processor 510 can include, but is not limited to, a central processing unit (CPU), a digital signal processor (DSP), a microcomputer, a field programmable gate array (FPGA), a system on chip (SoC), a microprocessor, an application specific integrated circuit (ASIC), etc. The memory 520 can store a computer program to be executed by the processor 510. The memory 520 can include a high-speed random access memory and / or a non-volatile computer readable storage medium. When the processor 510 executes the computer program stored in the memory 520, the control method of the wind turbine generator set as described above can be implemented.

[0044] Alternatively, the controller 500 can communicate with other various components in the wind turbine generator set in a wired or wireless communication manner, and can also communicate with other devices in the wind farm (for example, a master controller of the wind farm) in a wired or wireless communication manner. In addition, the controller 500 can communicate with devices outside the wind farm in a wired or wireless communication manner.

[0045] The control method of the wind power generator set according to the embodiments of the present disclosure can be written as a computer program and stored on a computer-readable storage medium. When the computer program is executed by a processor, the control method of the wind power generator set as described above can be implemented. Examples of the computer-readable storage medium include a read-only memory (ROM), a random access programmable read-only memory (PROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), a dynamic random access memory (DRAM), a static random access memory (SRAM), a flash memory, a non-volatile memory, a CD-ROM, a CD-R, a CD+R, a CD-RW, a CD+RW, a DVD-ROM, a DVD-R, a DVD+R, a DVD-RW, a DVD+RW, a DVD-RAM, a BD-ROM, a BD-R, a BD-RLTH, a BD-RE, a Blu-ray or an optical disc memory, a hard disk drive (HDD), a solid state drive (SSD), a card memory (such as a multimedia card, a secure digital (SD) card or an extreme digital (XD) card), a magnetic tape, a floppy disk, a magneto-optical data storage device, an optical data storage device, a hard disk, a solid state disk, and any other device configured to store a computer program and any associated data, data files and data structures in a non-transitory manner and provide the computer program and any associated data, data files and data structures to a processor or a computer so that the processor or the computer can execute the computer program. In one example, the computer program and any associated data, data files and data structures are distributed on a networked computer system, so that the computer program and any associated data, data files and data structures are stored, accessed and executed by one or more processors or computers in a distributed manner.

[0046] According to the embodiments of the present disclosure, a wind power generator set can be provided, which includes the controller as described above.

[0047] The control method of the wind power generator set, the controller and the wind power generator set according to the embodiments of the present disclosure can realize effective protection of the entire operating condition of the wind power generator set (especially the low-speed large-torque operating condition or the overspeed large-torque operating condition) by adjusting the generator torque upper limit in real time according to the actual operating condition of the wind power generator set, and protect the wind power generator set in advance in the limit operating condition, thereby improving the safe operation reliability of the wind power generator set. In addition, the control method of the wind power generator set, the controller and the wind power generator set according to the embodiments of the present disclosure can effectively avoid overdesign, reduce the control cost of the wind power generator set, and will not increase the hardware cost of the wind power generator set, facilitating popularization and application.

[0048] While certain embodiments of the disclosure have been described and shown, those skilled in the art will understand that modifications can be made without departing from the principles and spirit of the disclosure, which is defined by the following claims and their equivalents.

Claims

1. A control method for a wind turbine generator set, characterized in that, The control method for the wind turbine generator set includes: Obtain the generator speed during the operation of the wind turbine generator set; Based on a pre-determined generator speed-torque mapping table that reflects the upper limit of generator speed and generator torque, the upper limit of generator torque corresponding to the obtained generator speed is determined. The generator speed-torque mapping table is obtained by testing the wind turbine generator set in constant speed mode under various operating conditions. The constant speed mode refers to controlling the generator speed in a stable state and increasing the given torque value of the generator until the upper limit of generator torque is reached. Based on the determined upper limit of generator torque, the preset operating parameters of the wind turbine generator set are limited.

2. The control method for a wind turbine generator set as described in claim 1, characterized in that, Obtain the generator speed during wind turbine operation, including: The generator speed is obtained while the converter side of the wind turbine generator is in operation.

3. The control method for a wind turbine generator set as described in claim 1, characterized in that, The preset operating parameters include the generator torque and / or output power of the wind turbine generator set.

4. The control method for a wind turbine generator set as described in claim 3, characterized in that, Based on a determined upper limit for generator torque, the preset operating parameters of the wind turbine generator set are limited, including: In response to the current generator torque being greater than a determined upper limit value for generator torque, the generator torque is limited to the determined upper limit value for generator torque.

5. The control method for a wind turbine generator set as described in claim 3, characterized in that, Based on a determined upper limit for generator torque, the preset operating parameters of the wind turbine generator set are limited, including: Based on the determined upper limit of generator torque, the upper limit of wind turbine output power is determined; In response to the current generator set's output power exceeding a predetermined upper limit, the generator set's output power is limited to the predetermined upper limit.

6. The control method for a wind turbine generator set as described in claim 1, characterized in that, The various operating conditions include at least a first operating condition and a second operating condition. Under the first operating condition, the generator speed is greater than the grid-connected speed and less than the rated speed. Under the second operating condition, the generator speed is greater than the rated speed and less than the maximum permissible speed.

7. The control method for a wind turbine generator set as described in claim 6, characterized in that, The generator speed-torque mapping table was obtained by testing the wind turbine generator under various operating conditions, including: By conducting at least one test on the wind turbine generator set under the first operating condition, a first correspondence between the generator speed and the upper limit of the generator torque under the first operating condition is determined. By conducting at least one test on the wind turbine generator set under the second operating condition, a second correspondence between the generator speed and the upper limit of the generator torque under the second operating condition is determined. The generator speed-torque mapping table is constructed based on the first and second correspondence relationships.

8. The control method for a wind turbine generator set as described in claim 7, characterized in that, By conducting at least one test on the wind turbine generator set under the first operating condition, a first correspondence between the generator speed and the upper limit of the generator torque under the first operating condition is determined, including: By performing software simulation on the wind turbine generator set in constant speed mode under the first operating condition, the first upper limit value of the generator torque corresponding to each generator speed under the first operating condition is determined. When the generator torque is not greater than the first upper limit value, the preset operating indicators of the wind turbine generator set meet the design requirements. By conducting a towing platform test on the wind turbine generator set in constant speed mode under the first operating condition, a second upper limit value of the generator torque corresponding to each generator speed under the first operating condition is determined. When the generator torque is not greater than the second upper limit value, the preset operating indicators of the wind turbine generator set meet the design requirements. By conducting prototype testing of the wind turbine generator set in constant speed mode under the first operating condition, the third upper limit value of the generator torque corresponding to each generator speed under the first operating condition is determined. When the generator torque is not greater than the third upper limit value, the preset operating indicators of the wind turbine generator set meet the design requirements. Based on the first upper limit value, the second upper limit value, and the third upper limit value of the generator torque corresponding to each generator speed under the first operating condition, a first correspondence between the generator speed and the upper limit value of the generator torque under the first operating condition is determined.

9. The control method for a wind turbine generator set as described in claim 8, characterized in that, The preset operating indicators include generator speed fluctuation range, generator torque fluctuation range, output power control deviation and / or generator torque tracking accuracy.

10. The control method for a wind turbine generator set as described in claim 8, characterized in that, Based on the first, second, and third upper limits of the generator torque corresponding to each generator speed under the first operating condition, a first correspondence between the generator speed and the upper limit of the generator torque under the first operating condition is determined, including: For any generator speed among all generator speeds under the first operating condition, the minimum value among the first upper limit value, the second upper limit value, and the third upper limit value of the generator torque corresponding to the arbitrary generator speed is determined as the upper limit value of the generator torque corresponding to the arbitrary generator speed. Based on the upper limit of the generator torque corresponding to each generator speed under the first operating condition, a first correspondence between the generator speed and the upper limit of the generator torque under the first operating condition is determined.

11. The control method for a wind turbine generator set as described in claim 7, characterized in that, By conducting at least one test on the wind turbine generator set under the second operating condition, a second correspondence between the generator speed and the upper limit of the generator torque under the second operating condition is determined, including: By performing software simulation on the wind turbine generator set in constant speed mode under the second operating condition, the first upper limit value of the generator torque corresponding to each generator speed under the second operating condition is determined. When the generator torque is not greater than the first upper limit value, the output power of the wind turbine generator set remains at the rated power. By conducting a towing platform test on the wind turbine generator set in constant speed mode under the second operating condition, the second upper limit value of the generator torque corresponding to each generator speed under the second operating condition was determined. When the generator torque is not greater than the second upper limit value, the output power of the wind turbine generator set remains at the rated power. By conducting prototype testing of the wind turbine generator set in constant speed mode under the second operating condition, the third upper limit value of the generator torque corresponding to each generator speed under the second operating condition was determined. When the generator torque is not greater than the third upper limit value, the output power of the wind turbine generator set remains at the rated power. Based on the first, second, and third upper limits of the generator torque corresponding to each generator speed under the second operating condition, a second correspondence between the generator speed and the upper limit of the generator torque under the second operating condition is determined.

12. The control method for a wind turbine generator set as described in claim 11, characterized in that, Based on the first, second, and third upper limits of the generator torque corresponding to each generator speed under the second operating condition, a second correspondence between the upper limits of generator speed and generator torque under the second operating condition is determined, including: For any generator speed among all generator speeds under the second operating condition, the minimum value among the first upper limit value, the second upper limit value, and the third upper limit value of the generator torque corresponding to the arbitrary generator speed is determined as the upper limit value of the generator torque corresponding to the arbitrary generator speed. Based on the upper limit of the generator torque corresponding to each generator speed under the second operating condition, a second correspondence between the upper limit of the generator speed and the generator torque under the first operating condition is determined.

13. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the control method for the wind turbine generator set as described in any one of claims 1 to 12.

14. A controller, characterized in that, The controller includes: processor; and A memory storing a computer program that, when executed by a processor, implements the control method for a wind turbine generator as described in any one of claims 1 to 12.

15. A wind turbine generator set, characterized in that, The wind turbine generator set includes the controller as described in claim 14.

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