US 12,392,321 B2
Shutdown maintenance method and apparatus for wind turbine, and device following a failure
Jingyuan Wang, Beijing (CN); Yan Li, Beijing (CN); Pin Lv, Beijing (CN); Qiang Li, Beijing (CN); and Mingrui Qi, Beijing (CN)
Assigned to GOLDWIND SCIENCE & TECHNOLOGY CO., LTD., Xinjiang (CN)
Appl. No. 18/575,436
Filed by GOLDWIND SCIENCE & TECHNOLOGY CO., LTD., Xinjiang (CN)
PCT Filed Sep. 26, 2022, PCT No. PCT/CN2022/121472
§ 371(c)(1), (2) Date Dec. 29, 2023,
PCT Pub. No. WO2023/231247, PCT Pub. Date Dec. 7, 2023.
Claims priority of application No. 202210611961.0 (CN), filed on May 31, 2022.
Prior Publication US 2024/0318629 A1, Sep. 26, 2024
Int. Cl. F03D 7/02 (2006.01); F03D 17/00 (2016.01); F03D 80/50 (2016.01)
CPC F03D 7/0264 (2013.01) [F03D 7/0268 (2013.01); F03D 17/014 (2023.08); F03D 80/50 (2016.05); F03D 80/505 (2023.08); F05B 2260/31 (2020.08)] 12 Claims
OG exemplary drawing
 
1. A method for maintaining a wind turbine generator plant, comprising steps of:
determining a failure of the wind turbine generator plant when the wind turbine generator plant enters a shutdown maintenance mode;
determining a maintenance wind speed corresponding to the failure, and
adjusting one of blades in the wind turbine generator plant to reach a predetermined azimuth angle and locking an impeller of the wind turbine generator plant to maintain the wind turbine generator plant in a case where the failure belongs to a first type of failure and a real-time wind speed obtained is less than or equal to the maintenance wind speed corresponding to the failure, the first type of failure comprising a failure that requires to lock the impeller for maintenance and the predetermined azimuth angle comprising one of integer multiples of 30°.