Method for operating a wind turbine

US11401914B2 · kind B2 · utility

Assignee

• Wobben Properties GmbH · DE

Inventors

• Andreas Lehn · Ludwigsburg, DE
• Dimitrios Bekiropoulos · Aurich, DE

Key dates

• Filing date: Jun 12, 2020
• Grant date: Aug 2, 2022
• Expiry date: Jun 12, 2040

Classification

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

Abstract

Provided is a method for operating a wind turbine that includes a rotor operable with variable rotor speed and having rotor blades with adjustable pitch angles. Wind causes a rotor thrust acting on the rotor depending on the rotor speed and depending on a common pitch angle. In partial load, when the wind is below rated speed, the turbine is controlled by a rotor speed curve, defining the rotor speed for each operating point of the turbine. In a normal mode when the operation of the turbine is not throttled, a normal rotor speed curve in combination with a normal common pitch angle is used, and in a throttled mode when the thrust is to be limited, a throttled rotor speed curve, different from the normal rotor speed curve, in combination with a throttled common pitch angle, different from the normal common pitch angle, is used to reduce the thrust.