Wind turbine and method for controlling the wind turbine using an operating characteristic curve

US11441538B2 · kind B2 · utility

Assignee

• Wobben Properties GmbH · DE

Inventors

• Ralf Messing · Aurich, DE
• Mustafa Onur KIMILLI · Munich, DE
• Frank Zimmermann · Stuttgart, DE
• Maik Nitsche · Schortens, DE
• Matthias Giesler · Aurich, DE

Key dates

• Filing date: Jan 14, 2019
• Grant date: Sep 13, 2022
• Expiry date: Jan 14, 2039

Classification

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

Abstract

A wind turbine includes a tower, an aerodynamic rotor operable at a variable rotor speed and having a plurality of rotor blades each having an adjustable rotor blade setting angle and a generator for generating an electrical output power. An operating characteristic curve is prespecified for operating the wind turbine. The operating characteristic curve indicates a relationship between the rotor speed and the output power. A controller is provided, which sets the output power in accordance with the operating characteristic curve depending on the rotor speed. The the operating characteristic curve has a starting rotation speed to which the rotor speed increases as soon as the wind turbine starts when a sufficient wind speed is reached. The starting rotation speed is defined depending on a tower natural frequency of the wind turbine and/or depending on a detected turbulence measure of the prevailing wind.