Wind turbines
By designing an active yaw system and a dedicated negative brake backup power supply in a wind turbine, the problem that aerodynamic rotors cannot maintain their headwind orientation under extreme wind conditions is solved, and the reliability and safety of the wind turbine under extreme conditions is achieved.
Patent Information
- Application Number
- CN202080023281.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2019-03-22
- Filing Date
- 2020-03-09
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2040-03-09
AI Technical Summary
Under extreme wind conditions, the aerodynamic rotor of the wind turbine may not maintain its headwind orientation, resulting in increased loads, which may cause structural damage or catastrophic failure, especially when the grid is interrupted, where the active yaw system does not function properly.
A wind turbine was designed, including an active yaw system and a dedicated negative brake backup power supply. During normal operation, the active yaw system is driven by the main power supply, maintaining the upwind orientation; when the grid is disconnected, the dedicated negative brake backup power supply keeps the negative brake on, allowing the aerodynamic rotor to passively rotate to the downwind orientation.
With this design, wind turbines can more reliably protect themselves from damage under extreme wind conditions, avoid failures caused by excessive structural loads, and do not require large capacity of active yaw system backup power.