System and method for controlling blade pitch on wind turbine rotor blades to reduce vibrations and limit loads in a locked condition of the turbine rotor

US12012934B2 · kind B2 · utility

Assignee

• General Electric Renovables Espana, S.L. · ES

Inventors

• Valentina Motta · Berlin, DE
• Darren John Danielsen · Glenville, US
• Marianne Luise Susanne Hartung · Bad Abbach, DE
• Martin Stettner · Salzbergen, DE
• Nikolai N. Pastouchenko · Glenville, US

Key dates

• Filing date: Dec 8, 2021
• Grant date: Jun 18, 2024
• Expiry date: Dec 8, 2041

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/72
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A proactive method and related wind turbine system are provided for reducing vibrations in the rotor blades when the rotor hub is locked against rotation. The method includes determining an initial blade orientation to wind direction and wind parameters for wind impacting the rotor blades. Based on the wind parameters and blade orientation, an angle of attack is determined for the rotor blades that will at least reduce vibrations expected to be induced in the blades from the current wind conditions. With a controller, the rotor blades are pitched to achieve the angle of attack using a pitch control system. The angle of attack is determined and the rotor blades are pitched from the initial blade orientation to the new angle of attack prior to vibrations being induced in the rotor blades.