Wind turbine control method for overspeed prevention using staged and continuous braking based on rectified voltage
This technology relates to an overspeed control method for renewable energy wind turbines that performs staged and continuous braking by monitoring blade rectified voltage.
Conventional wind turbines are prone to component damage and reduced durability due to blade overspeed during high winds.
To address this, the technology sets a braking initiation voltage and initiates and maintains braking in stages based on the rectified voltage, ensuring smooth operation and preventing overspeed.
Key Features:
- Standard setting step for defining the braking initiation voltage and maximum braking force of the wind turbine
- Rectified voltage monitoring step for checking the voltage generated by blade rotation
- Staged braking step that initiates braking and incrementally increases braking force when the rectified voltage exceeds the braking initiation voltage
- Continuous application of maximum braking force after staged braking, followed by re-checking the rectified voltage to control overspeed
