Control method, device and system for a wind turbine

1. A control method for a wind turbine, comprising:

acquiring current working conditions of a power system, a yaw system and a communication system of the wind turbine when a typhoon warning signal is received;

determining a target control strategy corresponding to the current working conditions according to a preset corresponding relationship between control strategies and working conditions of the power system, the yaw system and the communication system, wherein the control strategies comprise an active windward strategy for controlling the yaw system to face typhoon wind direction, a controlled passive leeward strategy for controlling the yaw system to face opposite to the typhoon wind direction, and a passive leeward strategy for adjusting the yaw system to face opposite to the typhoon wind direction; and

controlling the wind turbine by using the target control strategy.

2. The control method according to claim 1 , wherein before acquiring the current working conditions of the power system, the yaw system and the communication system of the wind turbine, the control method further comprises:

receiving the typhoon warning signal generated by a typhoon monitoring system via monitoring typhoons based on meteorological information.

3. The control method according to claim 1 , wherein determining the target control strategy corresponding to the current working conditions according to the preset corresponding relationship between the control strategies and the working conditions of the power system comprises:

selecting the active windward strategy as the target control strategy if the current working conditions of the power system, the yaw system and the communication system are normal;

selecting the controlled passive leeward strategy as the target control strategy if the current working conditions of the power system and the communication system are normal and the current working condition of the yaw system is abnormal; and

selecting the passive leeward strategy as the target control strategy if the current working conditions of the power system and the communication system are abnormal.

4. The control method according to claim 3 , wherein controlling the wind turbine by using the active windward strategy comprises;

sending a control command to the yaw system of the wind turbine to instruct the yaw system to yaw to face the typhoon wind direction according to the instruction of the control command.

5. The control method according to claim 3 , wherein controlling the wind turbine by using the passive leeward strategy comprises:

instructing the yaw system of the wind turbine to yaw to face opposite to the typhoon wind direction.

6. The control method according to claim 3 , wherein controlling the wind turbine by using the controlled passive leeward strategy comprises:

instructing the yaw system of the wind turbine to yaw to face opposite to the typhoon wind direction, and sending a control command to the yaw system of the wind turbine when a typhoon passes a location of the wind turbine so as to instruct the yaw system to loosen a yaw motor brake and adjust pressure of a yaw brake according to the control command.

7. The control method according to claim 1 , wherein controlling the wind turbine by using the target control strategy comprises:

receiving a time duration between a time when a predicted typhoon reaches a location of the wind turbine and a current time;

stopping wind power generation and controlling the wind turbine by using the active windward strategy, when it is determined that the time duration is less than a first threshold and the target control strategy is the active windward strategy;

stopping wind power generation and controlling the wind turbine by using the controlled passive leeward strategy, when it is determined that the time duration is less than a second threshold and the target control strategy is the controlled passive leeward strategy; and

stopping wind power generation and controlling the wind turbine by using the passive leeward strategy, when it is determined that the time duration is less than the second threshold and the target control strategy is the passive leeward strategy,

wherein the first threshold is less than the second threshold.

8. The control method according to claim 1 , wherein controlling the wind turbine by using the target control strategy comprises:

acquiring a twist margin of the yaw system of the wind turbine;

controlling the yaw system to untwist and controlling the wind turbine by using the target control strategy, if it is determined that the twist margin is less than a preset margin threshold.

9. A control device for a wind turbine, comprising:

a processor; and

a memory configured to store instructions executable by the processor,

wherein the processor is configured to:

acquire current working conditions of a power system, a yaw system and a communication system of the wind turbine when a typhoon warning signal is received;

determine a target control strategy corresponding to the current working conditions according to a preset corresponding relationship between control strategies and working conditions of the power system, the yaw system and the communication system, wherein the control strategies comprise an active windward strategy for controlling the yaw system to face typhoon wind direction, a controlled passive leeward strategy for controlling the yaw system to face opposite to the typhoon wind direction, and a passive leeward strategy for adjusting the yaw system to face opposite to the typhoon wind direction; and

control the wind turbine by using the target control strategy.

10. The control device according to claim 9 , wherein the processor is further configured to:

receive the typhoon warning signal generated by a typhoon monitoring system via monitoring typhoons based on meteorological information.

11. The control device according to claim 9 , wherein the processor is further configured to:

select the active windward strategy as the target control strategy if the current working conditions of the power system, the yaw system and the communication system are normal;

select the controlled passive leeward strategy as the target control strategy if the current working conditions of the power system and the communication system are normal and the current working condition of the yaw system is abnormal; and

select the passive leeward strategy as the target control strategy if the current working conditions of the power system and the communication system are abnormal.

12. The control device according to claim 11 , wherein

when the target control strategy is the active windward strategy, the processor is further configured to send a control command to the yaw system of the wind turbine to instruct the yaw system to yaw to face the typhoon wind direction according to the instruction of the control command;

when the target control strategy is the passive leeward strategy, the processor is further configured to instruct the yaw system of the wind turbine to yaw to face opposite to the typhoon wind direction; and

when the target control strategy is the controlled passive leeward strategy, the processor is further configured to instruct the yaw system of the wind turbine to yaw to face opposite to the typhoon wind direction, and send a control command to the yaw system of the wind turbine when a typhoon passes a location of the wind turbine so as to instruct the yaw system to loosen a yaw motor brake and adjust pressure of a yaw brake according to the control command.

13. The control device according to claim 12 , wherein the processor is further configured to:

receive a time duration between a time when a predicted typhoon reaches a location of the wind turbine and a current time;

stop wind power generation and control the wind turbine by using the active windward strategy, when it is determined that the time duration is less than a first threshold and the target control strategy is the active windward strategy;

stop wind power generation and control the wind turbine by using the controlled passive leeward strategy, when it is determined that the time duration is less than a second threshold and the target control strategy is the controlled passive leeward strategy; and

stop wind power generation and control the wind turbine by using the passive leeward strategy, when it is determined that the time duration is less than the second threshold and the target control strategy is the passive leeward strategy,

wherein the first threshold is less than the second threshold.

14. The control device according to claim 9 , wherein the processor is further configured to:

acquire a twist margin of the yaw system of the wind turbine;

control the yaw system to untwist and control the wind turbine by using the target control strategy, if it is determined that the twist margin is less than a preset margin threshold.

15. The control device according to claim 14 , wherein the control device is arranged in a main controller of the wind turbine.

16. A control system for a wind turbine, comprising the control device for the wind turbine according to claim 9 and a typhoon monitoring system, wherein the control device is communicatively coupled to the typhoon monitoring system.

17. The control system according to claim 16 , wherein the typhoon monitoring system is a SCADA system.

18. A non-transitory computer readable storage medium comprising instructions that, when executed by a processor, cause the processor to perform the control method for the wind turbine according to claim 1 .