Wind generating set shutdown control method, controller, system and storage medium thereof

Abstract

The invention provides a wind generating set shutdown control method, a controller, a system and a storage medium, and the method comprises the following steps: obtaining environment / state data of a wind generating set in real time, the environment / state data at least comprising wind speed, set rotating speed, power grid condition, gearbox temperature, generator temperature and set vibration condition; triggering a pre-stop event based on the actual state data, and generating a pre-stop control instruction; based on the pre-shutdown control instruction, preset delay time of a pre-shutdown event is triggered, a shutdown control instruction is triggered and generated in response to the situation that any item in the obtained environment / state data is between a second preset value and a third preset value of the corresponding data, and the second preset value is smaller than the third preset value; responding to the shutdown instruction, and matching a shutdown control mode according to a shutdown event level in the shutdown instruction; and controlling the wind generating set to execute a shutdown action according to the shutdown control mode.

Description

Technical Field

[0001] This invention relates to a wind power generation control technology, specifically to a wind turbine generator shutdown control method, controller, system, and storage medium. Background Technology

[0002] In actual operation, wind turbine generator sets employ different shutdown control strategies based on varying shutdown control needs and triggering events, as disclosed in Chinese patent application number 2023108262815. However, during shutdown control implementation, the triggering factor is either the influence of a key factor or the combined influence of multiple factors. This results in instantaneous fluctuations in the generator set's operating data due to the combined effects of internal and external factors, or triggers shutdown control, causing non-faulty or non-operational abnormalities that lead to shutdown actions and consequently, a loss of power generation.

[0003] To address the aforementioned shortcomings, this invention proposes a wind turbine generator shutdown control method, controller, and system. This solution can effectively identify shutdown events and ensure stable operation of the generator unit. It features simple, practical, fast, and effective control. Summary of the Invention

[0004] The main objective of this invention is to overcome the above-mentioned shortcomings and deficiencies of the prior art and to provide a wind turbine generator shutdown control method, controller, system and its storage medium.

[0005] The first aspect of this invention provides a method for controlling the shutdown of a wind turbine generator set, comprising:

[0006] Step S101: Real-time acquisition of environmental / status data of the wind turbine generator set, including at least wind speed, generator speed, grid conditions, gearbox temperature, generator temperature, and generator vibration status.

[0007] Step S102: Trigger a pre-stop event based on the actual state data and generate a pre-stop control command;

[0008] Step S103: Based on the pre-stop control command and the preset delay time for triggering the pre-stop event, and in response to any one of the environmental / status data acquired from the time the pre-stop event is triggered until the end of the preset delay time being between the second preset value and the third preset value of the corresponding data, a stop control command is triggered and generated. The second preset value is less than the third preset value. The second preset value is a first specific ratio of the maximum rated value set for the corresponding specific type of data in the environmental / status data. The third preset value is a second specific ratio of the maximum rated value set for the corresponding specific type of data in the environmental / status data. The first specific ratio is greater than or equal to 1, and the second specific ratio is greater than 1.

[0009] Step S104: In response to the shutdown command, a shutdown control mode is matched according to the shutdown command type, wherein the shutdown command is a fast shutdown control command or an emergency shutdown control command;

[0010] Preferably, the pre-shutdown event is when the environmental / state data includes at least any one of wind speed, generator speed, power grid status, gearbox temperature, generator temperature, and generator vibration status, and the pre-shutdown trigger condition is met. The pre-shutdown trigger condition is that the average value of any one of the following data types over a period of time is greater than or equal to its corresponding first preset value and less than or equal to its corresponding maximum rated value, and the maximum value among several data of the same type in the environmental / state data is less than a second preset value, wherein the first preset value is less than the second preset value.

[0011] Preferably, based on the pre-stop control command, the preset delay time for triggering the pre-stop event, and in response to any one of the environmental / status data acquired from the time the pre-stop event is triggered until the end of the preset delay time being between the second and third preset values ​​of the corresponding data, specifically, under the premise of satisfying the preset delay time, it is continuously determined that the current instantaneous value and / or average value of at least any type of data in the corresponding environmental / status data reaches or exceeds the first specific proportion of the corresponding maximum rated value, while being less than the second specific proportion of the corresponding maximum rated value.

[0012] Preferably, if the shutdown command is triggered by step S103 based on one or more of the wind speed, wind turbine speed, power grid status, gearbox temperature, generator temperature, generator speed, and unit vibration status in the actual status data, then the wind turbine generator set is controlled to perform a rapid shutdown based on the rapid shutdown control command generated by determining the shutdown event level as a rapid shutdown level.

[0013] Preferably, if the shutdown command is triggered simultaneously by two or more of the following in step S103 based on the actual state data: wind speed, wind turbine speed, power grid status, gearbox temperature, generator temperature, generator speed, and unit vibration status, then the wind turbine generator set is controlled to perform an emergency shutdown based on the emergency shutdown control command generated by determining the shutdown event level as an emergency shutdown level.

[0014] Preferably, step S102 further includes triggering and generating an emergency shutdown control command if the current instantaneous value of at least one of the environmental / state data, such as wind speed, wind turbine speed, power grid status, gearbox temperature, generator temperature, generator speed, and unit vibration status, reaches or exceeds a third preset value. Alternatively, an emergency shutdown control command can be triggered and generated to control the wind turbine generator set to perform an emergency shutdown based on the determination that the shutdown event level is an emergency shutdown level.

[0015] A controller provided in a second aspect of the present invention includes:

[0016] A processor suitable for implementing one or more computer programs as described in the first aspect of the present invention for the wind turbine generator shutdown control method;

[0017] And a computer storage medium storing one or more computer programs adapted to be loaded by the processor and executed as described in the first aspect of the invention, the wind turbine generator shutdown control method.

[0018] The third aspect of the present invention provides a control system having the controller described in the second aspect of the present invention. The controller is part of the main control system of a wind turbine generator set and realizes the shutdown control of the wind turbine generator set by implementing the wind turbine generator set shutdown control method described in the first aspect of the present invention.

[0019] The fourth aspect of the present invention provides a computer storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, it is used to perform the wind turbine generator shutdown control method as described in the first aspect of the present invention.

[0020] In summary, the wind turbine generator shutdown control method, controller, control system, and storage medium proposed in this invention, while fully considering the safety of wind turbine generators, add a pre-shutdown control strategy to existing shutdown control methods. This can solve and identify real and effective shutdown events of wind turbine generators, avoiding abnormal shutdowns caused by short-term excessive fluctuations in key influencing factors such as wind speed, generator speed, grid conditions, gearbox temperature, generator temperature, and generator vibration, which have a significant impact on the normal operation of wind turbine generators. This ensures that the wind turbine generator operates in a relatively stable state as much as possible. At the same time, the solution proposed in this invention also discloses the implementation of rapid or shutdown strategies based on the level of the shutdown triggering event. Also based on the premise of wind turbine safety and controllability, after the triggering of extreme shutdown events, it can effectively ensure the rapid and stable shutdown of the wind turbine generator in a very short time, ensuring wind turbine safety, and thus seeking a reasonable balance between stable operation and safety. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a flowchart illustrating a wind turbine generator shutdown control method provided in an embodiment of the present invention.

[0023] Figure 2 This is a flowchart illustrating a wind turbine generator shutdown control method provided in an embodiment of the present invention.

[0024] Figure 3 This is a flowchart illustrating a wind turbine generator shutdown control method provided in an embodiment of the present invention.

[0025] Figure 4 This is a structural block diagram of a controller provided in an embodiment of the present invention. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0027] Unless otherwise stated, all technical and scientific terms used in the embodiments of this invention have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this invention includes any and all combinations of one or more of the associated listed items.

[0028] It should be noted that the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0029] Please see Figures 1 to 3 The first aspect of the present invention provides a method for controlling the shutdown of a wind turbine generator set, comprising:

[0030] Step S101: Real-time acquisition of environmental / status data of the wind turbine generator set. This environmental / status data includes at least wind speed, turbine rotation speed, grid conditions, gearbox temperature, generator temperature, and turbine vibration status. The turbine vibration status further includes at least tower vibration, main shaft vibration, gearbox vibration, generator vibration, and blade vibration. Real-time acquisition of the wind turbine generator set's environmental / status data is a set of data collected within a specific time period according to sampling rules for each type of data.

[0031] Step S102: Trigger a pre-shutdown event based on the environment / status data and generate a pre-shutdown control command.

[0032] Step S103: Based on the pre-stop control command and the preset delay time for triggering the pre-stop event, and in response to any one of the environmental / status data acquired from the time the pre-stop event is triggered until the end of the preset delay time being between the second preset value and the third preset value of the corresponding data, a stop control command is triggered and generated. The second preset value is less than the third preset value. The second preset value is a first specific ratio of the maximum rated value set for the corresponding specific type of data in the environmental / status data. The third preset value is a second specific ratio of the maximum rated value set for the corresponding specific type of data in the environmental / status data. The first specific ratio is greater than or equal to 1, and the second specific ratio is greater than 1.

[0033] Step S102 of the wind turbine generator shutdown control method provided in the first aspect of the present invention further includes: when the wind speed, wind turbine speed, power grid status, gearbox temperature, generator temperature, generator speed, and generator vibration status in the environmental / state data do not meet the pre-shutdown event, a pre-shutdown control command is not generated.

[0034] In one feasible embodiment, a pre-shutdown event is defined as the environmental / state data, including at least one of wind speed, turbine speed, grid status, gearbox temperature, generator temperature, and turbine vibration status, satisfying a pre-shutdown trigger condition. The pre-shutdown trigger condition is that the average value of any one of the following data types over a period of time is greater than or equal to its corresponding first preset value and less than or equal to its corresponding maximum rated value, and the first preset value is less than the maximum rated value. The rated value should be understood as the maximum limit rated value of each component of the wind turbine generator set during long-term normal operation. When the maximum limit rated value is exceeded, the corresponding safety protection mechanism of the unit will be triggered.

[0035] The pre-shutdown event condition can be that the actual wind speed is between a first preset value and the cut-out wind speed rated value, and the maximum value among several wind speed data of the same type in the environmental / status data is less than a second preset value. The first preset value is less than the second preset value, and the second preset value is a first specific proportion of the maximum rated value set for a specific type of data in the environmental / status data, for example, the first specific proportion is 110% of the maximum rated value. Here, the cut-out wind speed rated value is the maximum rated value. For example, if the minimum rated wind speed when the wind turbine is running at full capacity is 15 m / s, the cut-out wind speed is 25 m / s, the first preset value is 24 m / s, and the actual wind speed is between the set [24 m / s, 25 m / s], and the 10 wind speed data obtained in real time within a specific time period are all between 23.7 m / s and 24.9 m / s, then the pre-shutdown trigger event can be triggered and a pre-shutdown control command can be generated. For example, if the average value of multiple wind speed data acquired in real time is between the set range of [24 m / s, 25 m / s], and the average value of multiple wind speed data is 24.3 m / s, a pre-shutdown trigger event can be triggered and a pre-shutdown control command can be generated. In this case, even if individual instantaneous wind speeds (e.g., an instantaneous wind speed of 25.2 m / s) exceed the rated cut-out wind speed, but 25.2 m / s is less than the parameter design of 27.5 m / s corresponding to the first specific proportion of the cut-out wind speed, the wind turbine will not immediately trigger a shutdown. Instead, combined with the design redundancy of the wind turbine, it allows the wind turbine to operate outside the wind load range of slightly higher than the minimum rated wind speed at full power for a very short period of time. It should be noted that the above examples are not intended to limit this patent. At the same time, because there are deviations between the design of the wind turbine and the actual values ​​of the actual operating conditions, the specific size of the first preset value can be set according to the specific circumstances and the degree of impact of environmental / state data that caused the pre-shutdown event on the safe operation of the wind turbine.

[0036] In this example, wind speed is used as an example. Those skilled in the art can also set the parameters according to actual needs, such as unit speed, grid conditions, gearbox temperature, generator temperature, and unit vibration, based on engineering practice.

[0037] Based on the pre-stop control command and a preset delay time for triggering the pre-stop event, and in response to any one of the environmental / status data acquired from the time the pre-stop event is triggered until the end of the preset delay time being between a second preset value and a third preset value of the corresponding data, specifically, under the premise of satisfying the preset delay time, continuously determining that the current instantaneous value and / or average value of at least any type of data in the corresponding environmental / status data reaches or exceeds a first specific proportion of the corresponding maximum rated value, while being less than a second specific proportion of the corresponding maximum rated value. It should be noted that the pre-stop control command in step S103 above includes the corresponding time information when the pre-stop event is triggered.

[0038] In one feasible embodiment, taking wind speed as an example, the minimum rated wind speed when the wind turbine is operating at full capacity is set to 15 m / s, the cut-off wind speed is 25 m / s, the instantaneous value of the current wind speed is 28 m / s, the average wind speed from the triggering of the pre-shutdown event to the end of the preset delay time is 29 m / s, the preset delay time for wind speed in triggering the pre-shutdown event is 10 s, the first specific ratio is set to 110% of the maximum rated value, i.e., 27.5 m / s, the second specific ratio is set to 120% of the maximum rated value, i.e., 30 m / s, after the pre-shutdown event is triggered, the duration of the pre-shutdown event is 10 s, and the real-time acquired instantaneous wind speed of 28 m / s and the average wind speed of 29 m / s both exceed the first specific ratio of 110% (i.e., 27.5 m / s) of the cut-off wind speed of 25 m / s and are less than the second specific ratio of 120% (i.e., 30 m / s) of the cut-off wind speed of 25 m / s, then a shutdown control command is generated based on the above triggering. For judgments regarding wind speed and generator speed, the average wind speed should be used as the primary basis, while for gearbox temperature and generator temperature, the current instantaneous value can be used as the primary basis. The settings should be tailored to the specific characteristics of the data. Optionally, secondary judgment criteria can be used as supplementary criteria to the primary basis.

[0039] To further ensure the safety of wind turbine generator sets, step S102 of the wind turbine generator set shutdown control method provided in the first aspect of the present invention further includes directly triggering and generating a shutdown control command when the current instantaneous value of at least one of the environmental / state data—wind speed, rotor speed, grid condition, gearbox temperature, generator temperature, generator speed, and generator vibration condition—reaches or exceeds a third preset value. For example, when the current instantaneous value of at least one of the environmental / state data—wind speed, rotor speed, grid condition, gearbox temperature, generator temperature, generator speed, and generator vibration condition—reaches or exceeds a second specific proportion of the corresponding maximum rated value, a shutdown event can be directly triggered and a shutdown command generated. For example, if the minimum rated wind speed at full power of the wind turbine generator set is 15 m / s, the cut-off wind speed is 25 m / s, and the currently acquired instantaneous wind speed is 30 m / s, then because the instantaneous wind speed is 30 m / s, the cut-off wind speed is 120% of the second specific proportion of the rated wind speed, and a shutdown command is directly generated. If the unit's carrying capacity allows, a preset delay time can be further set here, and this preset delay time is shorter than the preset delay time in step S103. For example, after the preset delay time of 2s or 3s, the current instantaneous value of at least one of the environmental / state data, namely wind speed, wind turbine speed, power grid status, gearbox temperature, generator temperature, generator speed, and unit vibration status, continuously reaches or exceeds the second specific proportion of the corresponding maximum rated value. If it reaches or exceeds the second specific proportion of the corresponding maximum rated value, a shutdown command is directly generated; if it does not reach or exceed the second specific proportion of the corresponding maximum rated value, step S103 is continuously executed.

[0040] Step S104: In response to the shutdown command, a shutdown control mode is matched according to the shutdown command type, wherein the shutdown command is a fast shutdown control command or an emergency shutdown control command.

[0041] Specifically, if the shutdown command is triggered by step S102 based on at least one of the following in the environmental / state data: wind speed, wind turbine speed, power grid status, gearbox temperature, generator temperature, generator speed, and unit vibration status, then an emergency shutdown control command is generated to control the wind turbine to perform an emergency shutdown based on the determination that the shutdown event level is an emergency shutdown level.

[0042] If the shutdown command is triggered by step S103 based on one of the following in the actual state data: wind speed, wind turbine speed, power grid status, gearbox temperature, generator temperature, generator speed, and unit vibration status, then a fast shutdown control command is generated to control the wind turbine to perform a fast shutdown based on the determination that the shutdown event level is a fast shutdown level.

[0043] If the shutdown command is triggered simultaneously by two or more of the following in step S103 based on the actual state data: wind speed, wind turbine speed, power grid status, gearbox temperature, generator temperature, generator speed, and unit vibration status, then an emergency shutdown control command is generated to control the wind turbine to perform an emergency shutdown based on the determination that the shutdown event level is an emergency shutdown level.

[0044] Step S105: Control the wind turbine generator set to perform a shutdown action according to the shutdown control mode.

[0045] When the shutdown event level is determined to be fast shutdown level, a fast shutdown control command is generated and implemented on the wind turbine generator set. The fast shutdown control includes at least controlling the generator power according to the preset power reduction and speed reduction shutdown control strategy during fast shutdown. In fast shutdown mode, the pitch actuator controls the blades to feather to the fast shutdown position or suppress vortex-induced position according to the preset pitch control strategy during fast shutdown, and controls the inverter to disconnect from the grid according to the fast shutdown mode.

[0046] When the shutdown event level is determined to be an emergency shutdown level, an emergency shutdown control command is generated and implemented on the wind turbine generator set according to the emergency shutdown control command. The emergency shutdown control further includes at least controlling the generator power according to the preset power reduction and speed reduction shutdown control strategy during emergency shutdown, controlling the pitch actuator to control the blades to feather to the emergency shutdown position or suppress vortex-induced position according to the preset pitch control strategy during emergency shutdown according to the emergency shutdown control command, and controlling the frequency converter to disconnect from the grid according to the emergency shutdown mode.

[0047] It should be noted that the specific implementation methods of the rapid shutdown control corresponding to the rapid shutdown level and the emergency shutdown control corresponding to the emergency shutdown level are known in the industry and will not be elaborated or explained here.

[0048] Please see Figure 4 A second aspect of the present invention provides a controller for a wind turbine generator set, comprising:

[0049] A processor, suitable for implementing one or more computer programs of the wind turbine generator shutdown control method described in one of the present invention;

[0050] And a computer storage medium storing one or more computer programs adapted to be loaded by the processor and executed as described in any one of the present inventions, for use in the wind turbine generator shutdown control method.

[0051] The wind turbine generator shutdown control method disclosed in this invention can be executed by the main control system of the wind turbine generator, specifically by the main controller of the main control system; alternatively, it can be executed by a third-party platform or software that is physically independent of the main control system but communicates with it. As an example, the shutdown control method is executed by the main controller of the main control system. The main controller may include the computer storage medium and the processor. The computer storage medium may store the aforementioned instructions or code. When the instructions or code are executed by the processor, the aforementioned shutdown control method can be performed.

[0052] The third aspect of the present invention provides a wind turbine generator control system, which may be a wind turbine generator main control system as part of the wind turbine generator, or one or more identical control terminals, or one or more different control terminals, or a server cluster or distributed system composed of multiple physical servers, or a cloud server for cloud computing services.

[0053] The fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is used to perform the wind turbine generator shutdown control method as provided in the first aspect of the present invention.

[0054] In the embodiments provided by the present invention, it should be understood that the disclosed technical content can be implemented by other equivalent or alternative methods. The device embodiments described above are merely illustrative, and the same or similar equivalent or alternative solutions to the present invention are included within the scope of the claims of this patent.

[0055] The computer storage medium provided by this invention is a memory device in a wind turbine generator control system, used to store programs and data. It is understood that the computer storage medium here can include both the built-in storage medium of the wind turbine generator control system and extended storage media supported by the wind turbine generator control system. The computer storage medium provides storage space that stores the operating system of the wind turbine generator control system. Furthermore, this storage space also stores one or more computer programs suitable for loading and execution by a processor.

[0056] In summary, the wind turbine generator shutdown control method, controller, control system, and storage medium proposed in this invention, while fully considering the safety of wind turbine generators, add a pre-shutdown control strategy to existing shutdown control methods. This can solve and identify real and effective shutdown events of wind turbine generators, avoiding abnormal shutdowns caused by short-term excessive fluctuations in key influencing factors such as wind speed, generator speed, grid conditions, gearbox temperature, generator temperature, and generator vibration, which have a significant impact on the normal operation of wind turbine generators. This ensures that the wind turbine generator operates in a relatively stable state as much as possible. At the same time, the solution proposed in this invention also discloses the implementation of rapid or shutdown strategies based on the level of the shutdown triggering event. Also based on the premise of wind turbine safety and controllability, after the triggering of extreme shutdown events, it can effectively ensure the rapid and stable shutdown of the wind turbine generator in a very short time, ensuring wind turbine safety, and thus seeking a reasonable balance between stable operation and safety.

Claims

1. A method for controlling the shutdown of a wind turbine generator set, characterized in that, It includes: Step S101: Real-time acquisition of environmental / status data of the wind turbine generator set, including at least wind speed, generator speed, grid conditions, gearbox temperature, generator temperature, and generator vibration status. Step S102: Trigger a pre-stop event based on the actual state data and generate a pre-stop control command; Step S103: Based on the pre-stop control command and the preset delay time for triggering the pre-stop event, and in response to any one of the environmental / status data acquired from the time the pre-stop event is triggered until the end of the preset delay time being between the second preset value and the third preset value of the corresponding data, a stop control command is triggered and generated. The second preset value is less than the third preset value. The second preset value is a first specific ratio of the maximum rated value set for the corresponding specific type of data in the environmental / status data. The third preset value is a second specific ratio of the maximum rated value set for the corresponding specific type of data in the environmental / status data. The first specific ratio is greater than or equal to 1, and the second specific ratio is greater than 1. Step S104: In response to the shutdown command, a shutdown control mode is matched according to the shutdown command type, wherein the shutdown command is a fast shutdown control command or an emergency shutdown control command; Step S105: Control the wind turbine generator set to perform a shutdown action according to the shutdown control mode.

2. The wind turbine generator shutdown control method as described in claim 1, characterized in that, A pre-shutdown event is defined as the environmental / state data, including at least one of wind speed, generator speed, grid status, gearbox temperature, generator temperature, and generator vibration status, meeting the pre-shutdown triggering conditions. The pre-shutdown triggering conditions are that the average value of any one of the following data types over a period of time is greater than or equal to its corresponding first preset value and less than or equal to its corresponding maximum rated value, and the maximum value among several data of the same type in the environmental / state data is less than a second preset value, wherein the first preset value is less than the second preset value.

3. The wind turbine generator shutdown control method as described in claim 1 or 2, characterized in that, Based on the pre-stop control command, the preset delay time for triggering the pre-stop event, and in response to any one of the environmental / status data acquired from the time the pre-stop event is triggered until the end of the preset delay time being between the second and third preset values ​​of the corresponding data, specifically, under the premise of satisfying the preset delay time, continuously judging that the current instantaneous value and / or average value of at least any type of data in the corresponding environmental / status data reaches or exceeds the first specific proportion of the corresponding maximum rated value, while being less than the second specific proportion of the corresponding maximum rated value.

4. The wind turbine generator shutdown control method as described in claim 3, characterized in that, If the shutdown command is triggered by step S103 based on one or more of the following in the actual state data: wind speed, wind turbine speed, power grid status, gearbox temperature, generator temperature, generator speed, and unit vibration status, then the wind turbine generator set will be controlled to perform a rapid shutdown according to the rapid shutdown control command generated based on the determination that the shutdown event level is a rapid shutdown level.

5. The wind turbine generator shutdown control method as described in claim 3, characterized in that, If the shutdown command is triggered simultaneously by two or more of the following in step S103 based on the actual state data: wind speed, wind turbine speed, power grid status, gearbox temperature, generator temperature, generator speed, and unit vibration status, then the wind turbine generator set will be controlled to perform an emergency shutdown based on the emergency shutdown control command generated according to the determination that the shutdown event level is an emergency shutdown level.

6. The wind turbine generator shutdown control method as described in claim 1, characterized in that, Step S102 further includes the following: if the current instantaneous value of at least one of the environmental / state data, namely wind speed, wind turbine speed, power grid status, gearbox temperature, generator temperature, generator speed, and unit vibration status, reaches or exceeds a third preset value, then an emergency shutdown control command is triggered and generated to control the wind turbine to implement an emergency shutdown based on the determination that the shutdown event level is an emergency shutdown level.

7. A controller, characterized in that, It includes: A processor suitable for implementing one or more computer programs of the wind turbine generator shutdown control method as described in any one of claims 1 to 6; The computer storage medium stores one or more computer programs adapted to be loaded by the processor and executed as described in any one of claims 1 to 6.

8. A control system, characterized in that, It has a controller as described in claim 7, which is part of the main control system of the wind turbine generator set and realizes the shutdown control of the wind turbine generator set by implementing the wind turbine generator set shutdown control method as described in any one of claims 1 to 6.

9. A computer storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, is used to perform the wind turbine generator shutdown control method as described in any one of claims 1 to 6.

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