CN103967704B - Control method and control system for impeller locking of wind power generating set - Google Patents

Abstract

Provided are a control method and a control system for impeller locking of a wind turbine generator set. The control system includes: an operating status detection device for obtaining wind speed, impeller speed and impeller braking status; a lock alignment sensor installed on the stator of the wind turbine generator for detecting whether the impeller's locking pin and locking hole are aligned ; User prompt device, used to notify the user that the locking pin can be inserted; Impeller control device, used to control the impeller in the feathering stop mode: if the acquired impeller braking status indicates that it is not currently in the braking state and the wind speed is less than the first wind speed threshold And if the impeller speed is less than the first speed threshold, the impeller control device initiates a braking operation on the impeller; if the lock alignment sensor detects that the lock pin is in an aligned state, the user prompt device notifies the user that the lock pin can be inserted. This reduces the dependence on the maintenance personnel's personal experience when performing impeller braking and locking and increases operational safety.

Description

Control method and control system for impeller locking of wind power generating set

technical field

The invention relates to an impeller control technology of a wind power generating set, in particular to a control method and a control system for impeller locking of a wind generating set.

Background technique

If the wind turbine operates for a long time, failures will inevitably occur. At this time, maintenance personnel need to climb up the wind turbine to perform corresponding maintenance work. Before carrying out maintenance work, maintenance personnel usually activate the brakes and lock the impellers to ensure the safety of the wind turbine.

Fig. 1 is a schematic top view of the overall layout of a wind power generating set. Fig. 2 is a schematic side view of a wind power plant. Maintenance personnel 5 perform impeller locking and fan maintenance operations in the nacelle. Fig. 3 shows a schematic diagram of impeller braking and locking viewed from the direction shown by A in Fig. 1 . The positions of the rotor 10 , the fixed shaft 20 , the impeller locking device 30 and the impeller brake 40 are marked in FIG. 3 .

Fig. 4 schematically shows the structure at the locking pin of the impeller. A movable locking pin 50 is embedded in the fixed shaft 20 , and a recessed locking hole 60 is provided in the rotor 10 . During the operation of locking the impeller, when the rotor 10 rotates to the position where the locking hole 60 is aligned with the locking pin, the locking pin 50 can be inserted into the locking hole 60 to complete the locking of the impeller.

Since the wind turbine impeller is connected with the rotor shaft of the generator motor, the brake of the wind turbine impeller locks the motor rotor of the wind turbine on the motor side and thus achieves the purpose of locking the impeller.

When it is necessary to perform maintenance of the wind turbine, the maintenance personnel enter the wind turbine at the allowable wind speed, brake first, and artificially judge whether the speed of the impeller is below the set value of the brake speed allowed by the design before braking. . If it is determined that the rotational speed meets the braking requirements, the braking action can be performed while adjusting the locking pin to align with the locking hole. After the above operations are completed, the maintenance personnel will start the locking pin and push it into the locking hole to lock the impeller, so as to ensure that the impeller will not rotate suddenly due to changes in external wind conditions, posing a threat to the safety of the maintenance personnel. Thereafter, after the maintenance personnel complete the maintenance work, it is necessary to artificially judge again whether the locking pin can withdraw without being stuck. If the requirements are met, the maintenance personnel withdraw from the locking pin and leave the wind turbine after completing the maintenance work.

Both impeller braking and impeller locking have certain technical requirements, and the next operation can only be performed when the impeller speed and the external wind conditions of the nacelle meet the requirements, and the current maintenance personnel mainly rely on personal experience to judge and try to operate.

Contents of the invention

The purpose of the present invention is to provide a control method and control system for the locking of the impeller of the wind power generating set, by automatically detecting the wind speed and the operating state of the wind generating set to perform the control of the impeller brake and guide the maintenance personnel to perform the impeller locking operation, thereby The dependence on the personal experience of maintenance personnel in performing impeller braking and locking is reduced and the safety of said operation is increased.

According to an aspect of the present invention, there is provided a control method for impeller locking of a wind power generating set, including, in the feathering stop mode, performing the following steps: acquiring wind speed, impeller rotational speed and impeller brake status of the wind generating set; if The obtained impeller brake state indicates that it is not currently in the brake state, the obtained wind speed is less than the first wind speed threshold and the obtained impeller speed is less than the first speed threshold, then start the brake operation on the impeller; if the obtained impeller brake state indicates that it is currently in the brake state , then detect whether the locking pin is aligned with the locking hole; if it is detected that the locking pin is aligned with the locking hole, the acquired wind speed is less than the second wind speed threshold and the acquired impeller speed is less than the second speed threshold, then notify the user that the lock can be inserted pin.

According to another aspect of the present invention, there is provided a control system for impeller locking of a wind power generating set, comprising: an operating state detection device for acquiring wind speed, the impeller speed of the wind generating set, and the brake state of the impeller; a locking alignment sensor , installed on the stator of the wind power generating set, used to detect whether the locking pin of the impeller is aligned with the locking hole; the user prompting device is used to notify the user that the locking pin can be inserted; the impeller control device is used in the feathering stop mode, The state of the impeller is controlled by the wind speed obtained by the operating state detection device, the impeller speed of the wind power generating set and the impeller brake state. The control includes: if the impeller control device determines that the obtained impeller braking state indicates that it is not currently in a braking state, the obtained wind speed is less than the first wind speed threshold and the obtained impeller speed is less than the first speed threshold, then the impeller control device starts braking the impeller Operation; if the impeller control device determines that the obtained impeller braking state indicates that it is currently in a braking state, the impeller control device detects whether the locking pin is aligned with the locking hole through the lock alignment sensor; if the impeller control device determines that the obtained wind speed is less than the second wind speed threshold 1. The obtained impeller rotation speed is less than the second rotation speed threshold, and the locking alignment sensor detects that the locking pin is in the alignment state, then the user is notified through the user prompting device that the locking pin can be inserted.

Beneficial effect

According to the control method for impeller locking of a wind power generating set and the control system for implementing the above method, the conditions for allowing impeller braking can be determined by monitoring the operating conditions of the unit, and the impeller braking can be automatically controlled. In addition, it also detects the alignment state of the locking pin of the impeller and the locking hole, and further guides the maintenance personnel to perform the impeller locking operation according to the operating conditions of the unit and the alignment state. It is judged manually when to perform impeller locking, thereby reducing the dependence on personal experience of maintenance personnel when performing impeller braking and locking, and improving the safety of impeller braking and locking operations. In addition, by monitoring the impeller locking status and the operating parameters of the unit, it is possible to further determine when it is appropriate to guide the maintenance personnel to perform the operation of releasing the impeller lock after completing the maintenance work of the wind turbine, which further reduces the need for maintenance personnel when performing impeller locking. Dependency of experience and increase the safety of impeller locking operation.

On this basis, the control method and control system for the impeller locking of the wind power generating set of the present invention can also visually display the current Whether the operating status of the fan is suitable for specific operations, thereby assisting maintenance personnel in impeller locking and fan maintenance operations.

Description of drawings

Fig. 1 is a schematic top view of the overall layout of a wind turbine;

Figure 2 is a schematic side view of the layout of a wind turbine;

Fig. 3 is a schematic diagram showing the braking and locking of the impeller viewed from the direction shown in Fig. 1 A;

Fig. 4 is a schematic diagram showing the locking pin of the impeller;

FIG. 5 is a schematic diagram illustrating an arrangement of a sensor for measuring the alignment state of a locking pin and a locking hole according to an exemplary embodiment of the present invention;

Fig. 6 is a flowchart illustrating a control method for impeller locking of a wind power generating set according to an exemplary embodiment of the present invention;

Fig. 7 is a flowchart illustrating a control method for impeller locking of a wind power generating set according to another exemplary embodiment of the present invention;

Fig. 8 shows a logic block diagram of a control system for impeller locking of a wind power generating set according to an exemplary embodiment of the present invention.

detailed description

The general inventive concept of the present invention is to provide a method and system for controlling and guiding the impeller locking of a wind power generating set. The operating parameters determine the state of the impeller brake, and automatically perform the impeller brake operation; on this basis, the control method and system for the impeller locking of the wind power generating set of the present invention can further detect that the impeller locking pin is aligned with the locking hole status, so as to guide the maintenance personnel to continue to perform the operation of locking the impeller, so as to perform the maintenance of the wind power generating set.

According to an exemplary embodiment of the present invention, the impeller rotation speed of the wind power generating set can be detected by a meter, the wind speed can be measured by an anemometer outside the nacelle, and an electrical signal indicating the braking state can be obtained from the impeller braking circuit to determine the impeller braking state. However, the aforementioned detection means are only exemplary technical means, and those skilled in the art may use any other means commonly used in the field of wind power to perform detection of wind speed, impeller rotational speed, and impeller brake status, without being limited to the means listed above.

A control method for impeller locking of a wind power generating set and a system using the method according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 6 is a flow chart illustrating a control method for impeller locking of a wind power generating set according to an exemplary embodiment of the present invention. For example, when the wind power generator needs to be maintained, the control method for impeller locking of the wind power generator according to the present invention is executed in the feathering shutdown mode.

Referring to Fig. 6, in step S610, it is determined that the wind power generating set enters the feathering shutdown mode.

In step S620, the wind speed, the impeller rotational speed and the impeller brake state of the wind power generating set are acquired. For example, the speed of the impeller of the wind power generating set can be detected by a meter, the wind speed can be measured by an anemometer outside the nacelle, and an electrical signal indicating the braking state can be obtained from the impeller braking circuit to determine the impeller braking state.

In step S630, it is determined whether the wind power generating set is in a braking state according to the obtained rotor braking state. If the obtained indication of the wind power generating set is not currently in the braking state, then in step S632, it is determined whether the obtained wind speed is less than the first wind speed threshold and whether the obtained impeller speed is less than the first speed threshold. Set the first wind speed threshold and the first speed threshold according to the range of empirical values that are generally considered safe for braking operations, for example, the first wind speed threshold and the first speed threshold can be set to 11 m/min and 0.5 rev/min respectively . If in step S632, it is determined that the acquired wind speed is less than the first wind speed threshold and the acquired rotor speed is less than the first rotational speed threshold, then it may be considered that the current operating state of the wind power generating set is suitable for performing rotor braking, thereby performing step S635. In step S635, the brake operation on the impeller is initiated. Thereafter, it may return to step S620 to continue detecting the operating parameters of the unit. On the other hand, if in step S632, it is determined that the obtained wind speed is not less than the first wind speed threshold or the obtained impeller speed is not less than the first speed threshold, then directly return to step S620 to continue detecting the operating parameters of the unit.

If at step S630, the obtained impeller braking state indicates that the wind power generating set has entered the braking state, then at step S650, it is detected whether the locking pin is aligned with the locking hole. For example, whether the locking pin is aligned with the locking hole can be detected by a sensor installed on the stator. FIG. 5 is a schematic diagram showing the arrangement of the sensor for measuring the alignment state of the locking pin and the locking hole according to an exemplary embodiment of the present invention. . After step S650 is performed, step S660 may be continuously performed.

In step S660, it is determined whether it is detected that the locking pin is aligned with the locking hole, whether the acquired wind speed is less than the second wind speed threshold and whether the acquired impeller rotational speed is less than the second rotational speed threshold. The second speed threshold and the second wind speed threshold can be set according to the range of empirical values that are generally considered safe for locking operations, for example, the second speed threshold can be 0.1 rpm or lower, and the second wind speed threshold can be 11 m/min. minutes or lower. If the above-mentioned conditions are satisfied, it can be considered that the impeller locking can be performed, so the user is notified at step S665 that the locking pin can be inserted. Thereafter, as shown in FIG. 6 , the processing of the control method may end, or return to step S620 to continue detecting the operating parameters of the unit. On the other hand, if it is detected that the locking pin is not aligned with the locking hole, the obtained wind speed is not less than the second wind speed threshold or the obtained impeller speed is not less than the second speed threshold, return to step S620 and continue to set the operating parameters of the unit. detection.

It can be seen from the exemplary embodiment described with reference to FIG. 6 that the control method for impeller locking of a wind power generating set according to the present invention can determine the conditions for allowing the implementation of impeller braking by monitoring the operating conditions of the unit, and automatically control the implementation of impeller braking. . In addition, it also detects the alignment state of the locking pin of the impeller and the locking hole, and further guides the maintenance personnel to perform the impeller locking operation according to the operating conditions of the unit and the alignment state. It is judged manually when to perform impeller locking, thereby reducing the dependence on personal experience of maintenance personnel when performing impeller braking and locking, and improving the safety of impeller braking and locking operations.

Fig. 7 is a flowchart illustrating a control method for impeller locking of a wind power generating set according to another exemplary embodiment of the present invention. In the embodiment shown in FIG. 7 , the processing of steps S610 , S632 , S635 , S650 , S660 and S665 is the same as the processing of the corresponding steps shown in FIG. 6 .

Referring to FIG. 7 , in step S620 , in addition to obtaining the wind speed, the impeller rotational speed of the wind generating set and the impeller braking state, the impeller locking state of the wind generating set is also obtained. In wind turbines, when a rotor locking operation is performed by the rotor locking system, the rotor locking system usually returns an electrical signal indicating that the rotor is locked. Therefore, the impeller locking state can be obtained according to whether the impeller locking system of the wind power generating set has returned an electrical signal indicating impeller locking.

Thereafter, in step S630, it is determined whether the wind power generating set is in a braking state according to the obtained rotor braking state. If the obtained indication of the wind power generating set is not currently in the braking state, continue to execute step S632 as shown in FIG. 6 . On the other hand, if in step S630, the obtained rotor braking state indicates that the wind power generating set has entered the braking state, then step S640 is executed.

In step S640, it is determined whether the obtained impeller braking state indicates that the impeller is currently in a braking state, whether the obtained impeller locking state indicates that the impeller is currently in a locked state, whether the obtained wind speed is less than the second wind speed threshold and whether the obtained impeller speed is less than the second speed threshold . If the above conditions are all met, it indicates that the current impeller has been locked, and the operating condition of the unit meets the condition of withdrawing from the locking pin, so step S645 is executed. In step S645, the user is notified that the locking pin can be withdrawn. Thereafter, it may return to step S620 to continue detecting the operating parameters of the unit, or end the processing of the control method.

On the other hand, if in step S640, it is determined that the obtained impeller lock state indicates that the impeller is not currently locked, the obtained wind speed is not less than the second wind speed threshold or the obtained impeller speed is not less than the second speed threshold, then continue to step S650.

From the embodiment described with reference to Fig. 7, it can be seen that the control method for impeller locking of a wind power generating set according to the present invention can further determine when it is appropriate to guide maintenance personnel to complete the wind power by monitoring the impeller locking state and the operating parameters of the set. The operation of unlocking the impeller after the maintenance work of the generating set further reduces the dependence on the personal experience of the maintenance personnel when performing the impeller locking and improves the safety of the impeller locking operation.

According to an exemplary embodiment of the present invention, in the control method for impeller locking of a wind power generating set of the present invention, at least one set of indicator lights is also used to visually display whether the current operating state of the wind turbine is suitable for performing a specific operation. Each group of indicator lights may be a single light that displays multiple colors, or multiple lights that display different colors.

According to the exemplary embodiment of using the indicator light, if in step S632, it is determined that the obtained wind speed is less than the first wind speed threshold and the obtained impeller rotational speed is less than the first rotational speed threshold, then in step S635, in addition to starting the braking operation on the impeller , and display the first group of indicator lights as the first state to indicate to the user that the brake operation has been initiated; if in step S632, it is determined that the obtained wind speed is not less than the first wind speed threshold or the obtained impeller speed is not less than the first speed threshold, Then, the first set of indicator lights are displayed as the second state to indicate that the current operating conditions of the wind turbine do not allow the impeller to be braked.

According to the exemplary embodiment of using the indicator light, if in step S660, it is detected that the locking pin is in the state where the locking pin is aligned with the locking hole, the acquired wind speed is less than the second wind speed threshold and the acquired impeller rotational speed is less than the second rotational speed threshold , then in step S665, in addition to notifying the user that the locking pin can be inserted, the second set of indicator lights will also be displayed as the first state to indicate that the current operating condition of the wind turbine allows impeller locking; if in step S660, it is detected that the locking pin is not In the state where the locking pin is aligned with the locking hole, the obtained wind speed is not less than the second wind speed threshold or the obtained impeller speed is not less than the second speed threshold, then the second group of indicator lights will be displayed as the second state to indicate that it is not yet possible to Perform impeller lock.

In addition, if in step S640, it is determined that the obtained impeller lock state indicates that the impeller is currently in a locked state, the obtained wind speed is less than the second wind speed threshold and the obtained impeller rotational speed is less than the second rotational speed threshold, then in step S645 a third set of indicator lights will be displayed If in step S660, it is determined that the obtained impeller lock state indicates that the impeller is not in the locked state, the obtained wind speed is not less than the second wind speed threshold or the obtained impeller speed is not less than the second speed threshold, the third group of indicator lights is displayed as the second state.

The first state and the second state of each group of indicator lights mentioned above may be a color state or a blinking state. For example, the first state and the second state are respectively different colors, such as green and red; for another example, the first state and the second state are respectively a steady state display and a blinking display.

According to a preferred embodiment of the present invention, during the process of displaying any set of indicator lights in the second state, the acquired wind speed and rotational speed may also be displayed or voiced.

By setting multiple groups of indicator lights and/or display/voice prompts to obtain the operating parameters of the wind power generating set, the control method for the impeller locking of the wind generating set of the present invention can also visually display whether the current operating state of the wind turbine is suitable for performing a specific operation. operation, so as to assist the maintenance personnel in the operation of impeller locking and fan maintenance.

Fig. 8 is a logic block diagram illustrating a control system for impeller locking of a wind power generating set according to an exemplary embodiment of the present invention.

Referring to FIG. 8 , a control system for impeller locking of a wind power generating set according to an exemplary embodiment of the present invention includes a running state detection device 810 , a impeller control device 820 , a user prompting device 830 and a lock alignment sensor 840 .

The running state detection device 810 is used to acquire wind speed, impeller speed and impeller brake state of the wind power generating set. According to an optional embodiment of the present invention, the running state detection device 810 detects the impeller speed of the wind power generating set through a meter, measures the wind speed through an anemometer outside the nacelle, and obtains an electrical signal indicating the braking state from the impeller brake circuit.

The impeller control device 820 is used to control the state of the impeller through the wind speed obtained by the operating state detection device 810 , the impeller rotational speed and the impeller brake state of the wind power generating set in the feathering shutdown mode.

The user prompting device 830 is used to notify the user that the locking pin can be inserted. According to an exemplary embodiment of the present invention, the user prompting device 830 displays or voice prompts the wind speed and rotational speed acquired by the running state detecting device 810 .

The locking alignment sensor 840 installed on the stator of the wind power generating set is used to detect whether the locking pin of the impeller is aligned with the locking hole, and the locking alignment sensor 840 can be installed as shown in FIG. 5 .

According to an exemplary embodiment of the present invention, the control performed by the impeller control device 820 on the state of the impeller includes: if the impeller control device 820 determines that the brake state of the impeller obtained by the operating state detection device 810 indicates that it is not currently in a brake state, and the obtained wind speed is less than The first wind speed threshold and the obtained impeller speed is less than the first speed threshold, then the impeller control device 820 starts the braking operation on the impeller; if the impeller control device 820 determines that the impeller braking state indication obtained by the running state detection device 810 is currently in a braking state, then The impeller control device 820 detects whether the locking pin and the locking hole are aligned through the locking alignment sensor 840; If the second wind speed threshold is reached and the obtained impeller rotation speed is less than the second rotation speed threshold, then the user prompting device 830 is used to notify the user that the locking pin can be inserted.

According to a preferred embodiment of the present invention, the user prompting device 830 includes a first group of indicator lights, wherein, if the impeller control device 820 determines that the impeller braking state indication obtained by the operating state detection device 810 is not currently in a braking state, and the obtained wind speed is less than the first wind speed threshold and the obtained impeller speed is less than the first speed threshold, the impeller control device 820 starts the braking operation on the impeller, and the user prompting device 830 displays the first group of indicator lights as the first state.

According to a preferred embodiment of the present invention, if the impeller control device 820 determines that the impeller braking state obtained by the running state detection device 810 indicates that it is not currently in a braking state, and the obtained wind speed is not less than the first wind speed threshold or the obtained impeller speed is not less than the first If the rotational speed threshold is exceeded, the impeller control device 820 starts the braking operation on the impeller, and the user prompting device 830 displays the first group of indicator lights as the second state.

According to a preferred embodiment of the present invention, the user prompting device 830 also includes a second group of indicator lights, wherein, if the impeller control device 820 determines that the wind speed obtained by the operating state detection device 810 is less than the second wind speed threshold, the obtained impeller speed is less than the second speed threshold and the lock alignment sensor 840 detects that the lock pin is aligned with the lock hole, the user prompting device 840 displays the second set of indicator lights as the first state, and notifies the user that the lock pin can be inserted.

According to a preferred embodiment of the present invention, if the impeller control device 820 determines that the locking alignment sensor 840 detects that the locking pin is not in the state where the locking pin is aligned with the locking hole, the acquired wind speed is not less than the second wind speed threshold or the acquired impeller rotational speed is not If it is less than the second speed threshold, the user prompting device 830 displays the second group of indicator lights as the second state.

According to a preferred embodiment of the present invention, the running state detection device 810 is also used to obtain the impeller locking state of the wind power generating set. When it is determined that the obtained impeller braking state indicates that it is currently in a braking state, the impeller control device 820 first determines whether the obtained impeller locking state indicates that the impeller is currently in a locked state, whether the obtained wind speed is less than the second wind speed threshold and whether the obtained impeller speed is less than the second speed threshold. If the impeller control means 820 determines that the acquired impeller lock state indicates that the impeller is currently locked, the acquired wind speed is less than the second wind speed threshold and the acquired impeller speed is less than the second speed threshold, the user prompting means 830 notifies the user that the locking pin can be withdrawn. If the impeller control device 820 determines that the obtained impeller lock state indicates that the impeller is not locked, the obtained wind speed is not less than the second wind speed threshold, or the obtained impeller speed is not less than the second speed threshold, then the impeller control device 820 detects through the lock alignment sensor Whether the locking pin is aligned with the locking hole, and then continue to determine whether the condition of impeller locking is met according to the alignment state of the locking pin and the locking hole, wind speed and impeller speed.

According to a preferred embodiment of the present invention, the user prompting device 830 also includes a third group of indicator lights, wherein, if the impeller control device 820 determines that the obtained impeller lock state indicates that the impeller is currently in a locked state, the obtained wind speed is less than the second wind speed threshold and obtains If the rotation speed of the impeller is less than the second rotation speed threshold, the user prompting device 830 displays the third group of indicator lights as the first state, and notifies the user that the locking pin can be withdrawn.

According to a preferred embodiment of the present invention, if the impeller control device 820 determines that the obtained impeller lock state indicates that the impeller is not in the locked state, the obtained wind speed is not less than the second wind speed threshold or the obtained impeller speed is not less than the second speed threshold, the user prompts The means 830 displays the third set of indicator lights as the second state.

According to the control method for impeller locking of a wind power generating set and the control system for implementing the above method, the conditions for allowing impeller braking can be determined by monitoring the operating conditions of the unit, and the impeller braking can be automatically controlled. In addition, it also detects the alignment state of the locking pin of the impeller and the locking hole, and further guides the maintenance personnel to perform the impeller locking operation according to the operating conditions of the unit and the alignment state. It is judged manually when to perform impeller locking, thereby reducing the dependence on personal experience of maintenance personnel when performing impeller braking and locking, and improving the safety of impeller braking and locking operations. In addition, by monitoring the impeller locking status and the operating parameters of the unit, it is possible to further determine when it is appropriate to guide the maintenance personnel to perform the operation of releasing the impeller lock after completing the maintenance work of the wind turbine, which further reduces the need for maintenance personnel when performing impeller locking. Dependency of experience and increase the safety of impeller locking operation.

On this basis, the control method and control system for the impeller locking of the wind power generating set of the present invention can also visually display the current Whether the operating status of the fan is suitable for specific operations, thereby assisting maintenance personnel in impeller locking and fan maintenance operations.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (19)

1. A control method for impeller locking of a wind power generating set, comprising, in a feathering shutdown mode, performing the following steps: Obtain the wind speed, the impeller speed of the wind turbine, the impeller lock status and the impeller brake status of the wind turbine; if the acquired impeller brake status indicates that it is not currently in the brake state, the acquired wind speed is less than the first wind speed threshold and the acquired impeller rotational speed is less than the first A speed threshold, then start the brake operation on the impeller; If the obtained impeller brake state indicates that it is currently in the brake state, check whether the locking pin is aligned with the locking hole; If it is detected that the locking pin is aligned with the locking hole, the obtained wind speed is less than the second wind speed threshold and the obtained impeller speed is less than the second speed threshold, then notify the user that the locking pin can be inserted; If it is determined that the obtained impeller brake state indicates that the impeller is currently in the brake state, the obtained impeller lock state indicates that the impeller is currently in the locked state, the obtained wind speed is less than the second wind speed threshold and the obtained impeller speed is less than the second speed threshold, then notify the user that the lock can be exited pin. 2. The control method according to claim 1, characterized in that, If the obtained impeller braking status indicates that it is not currently in the braking state, the obtained wind speed is less than the first wind speed threshold and the obtained impeller speed is less than the first speed threshold, start the braking operation on the impeller, and display the first group of indicators as the first a state. 3. The control method according to claim 2, further comprising: If the obtained impeller brake state indicates that the brake is not currently in the state, and the obtained wind speed is not less than the first wind speed threshold or the obtained impeller speed is not less than the first speed threshold, then display the first group of indicator lights as the second state. 4. The control method according to claim 3, wherein if it is detected that the locking pin is in the state where the locking pin is aligned with the locking hole, the acquired wind speed is less than the second wind speed threshold and the acquired impeller rotational speed is less than the second rotational speed threshold , display the second set of indicator lights as the first state, and notify the user that the locking pin can be inserted. 5. The control method according to claim 4, characterized in that the control method further comprises: if it is detected that the locking pin is not in the state where the locking pin is aligned with the locking hole, the obtained wind speed is not less than the second wind speed threshold or If the obtained impeller speed is not less than the second speed threshold, the second group of indicator lights is displayed as the second state. 6. The control method according to any one of claims 1 to 5, wherein if it is determined that the obtained impeller lock state indicates that the impeller is currently in a locked state, the obtained wind speed is less than the second wind speed threshold and the obtained impeller speed is less than A second speed threshold, the third set of indicator lights is displayed as the first state, and the user is notified that the locking pin can be withdrawn. 7. The control method according to claim 6, wherein if it is determined that the obtained impeller lock state indicates that the impeller is not in the locked state, and the obtained wind speed is not less than the second wind speed threshold or the obtained impeller speed is not less than the second speed threshold, the third group of indicator lights is displayed as the second state. 8. The control method according to claim 7, wherein if it is determined that the obtained impeller locking state indicates that the impeller is not in the locked state, then detecting whether the locking pin is aligned with the locking hole, and If it is detected that the locking pin is aligned with the locking hole, the obtained wind speed is less than the second wind speed threshold and the obtained impeller rotational speed is less than the second rotational speed threshold, the user is notified that the locking pin can be inserted. 9. The control method according to claim 8, further comprising: displaying or voice prompting the obtained wind speed and rotating speed. 10. The control method according to claim 9, characterized in that a sensor installed on the stator detects whether the locking pin is aligned with the locking hole. 11. A control system for impeller locking of a wind turbine, comprising: The running state detection device is used to obtain the wind speed, the impeller speed of the wind generating set, the impeller locking state and the impeller braking state of the wind generating set; The lock alignment sensor is installed on the stator of the wind turbine, and is used to detect whether the lock pin of the impeller is aligned with the lock hole; User prompting means for notifying the user that the locking pin can be inserted; The impeller control device is used to control the state of the impeller by the wind speed acquired by the running state detection device, the impeller speed of the wind power generating set, the impeller locking state and the impeller braking state of the wind generating set in the feathering stop mode, and the control include: If the impeller control device determines that the obtained impeller braking state indicates that the impeller is currently in a braking state, the obtained impeller locking state indicates that the impeller is currently in a locked state, the obtained wind speed is less than the second wind speed threshold and the obtained impeller speed is less than the second speed threshold, then the user prompts The device notifies the user that the locking pin may be withdrawn; If the impeller control device determines that the obtained impeller braking state indicates that it is not currently in a braking state, the obtained wind speed is less than the first wind speed threshold and the obtained impeller speed is less than the first speed threshold, the impeller control device starts the brake operation on the impeller; If the impeller control device determines that the obtained impeller braking state indicates that it is currently in a braking state, the impeller control device detects whether the locking pin is aligned with the locking hole through the locking alignment sensor; If the impeller control device determines that the acquired wind speed is less than the second wind speed threshold, the acquired impeller rotational speed is less than the second rotational speed threshold, and the locking alignment sensor detects that the locking pin is in an alignment state, the user is notified by the user prompting device that the locking pin can be inserted. 12. The control system of claim 11, wherein: The user prompting device includes a first set of indicator lights, wherein, if the impeller control device determines that the obtained impeller braking state indicates that it is not currently in a braking state, the obtained wind speed is less than the first wind speed threshold and the obtained impeller speed is less than the first speed threshold, then the impeller The control device initiates a braking operation on the impeller, and the user prompting device displays the first set of indicator lights as a first state. 13. The control system according to claim 12, wherein if the impeller control device determines that the obtained impeller braking state indicates that it is not currently in a braking state, and the obtained wind speed is not less than the first wind speed threshold or the obtained impeller speed is not less than For the first speed threshold, the user prompting device displays the first group of indicator lights as the second state. 14. The control system according to claim 13, wherein the user prompting device further includes a second group of indicator lights, wherein, if the impeller control device determines that the obtained wind speed is less than the second wind speed threshold, the obtained impeller speed is less than the second The speed threshold and the lock alignment sensor detects that the lock pin is aligned with the lock hole, the user prompting device displays the second set of indicator lights as the first state, and notifies the user that the lock pin can be inserted. 15. The control system according to claim 14, wherein if the impeller control device determines that the obtained wind speed is not less than the second wind speed threshold, the obtained impeller rotational speed is not less than the second rotational speed threshold, or the locking alignment sensor detects that the locking pin If the locking pin is not aligned with the locking hole, the user prompting device displays the second group of indicator lights as the second state. 16. The control system according to any one of claims 11 to 15, wherein the user prompting device further includes a third group of indicator lights, wherein, if the impeller control device determines that the obtained impeller locking state indicates that the impeller is currently locked state, the obtained wind speed is less than the second wind speed threshold and the obtained impeller speed is less than the second speed threshold, then the user prompting device will display the third group of indicator lights as the first state, and notify the user that the locking pin can be withdrawn. 17. The control system according to claim 16, wherein if the impeller control device determines that the obtained impeller lock state indicates that the impeller is not in a locked state, and the wind speed obtained by the running state detection device is not less than the second wind speed threshold or the obtained If the speed of the impeller is not less than the second speed threshold, the third group of indicator lights is displayed as the second state. 18. The control system according to claim 17, wherein if the impeller control device determines that the obtained impeller lock state indicates that the impeller is not in a locked state, the lock alignment sensor detects whether the lock pin is aligned with the lock hole, and If the lock alignment sensor detects that the lock pin is aligned with the lock hole, the wind speed acquired by the running state detection device is less than the second wind speed threshold and the acquired impeller speed is less than the second speed threshold, the user prompting device notifies the user that the lock pin can be inserted . 19. The control system according to claim 18, characterized in that the user prompting device displays or voice prompts the obtained wind speed and rotational speed.