Method and system for controlling a wind turbine to manage edgewise blade vibrations

US11384731B2 · kind B2 · utility

Assignee

• Vestas Wind Systems A/S · DK

Inventors

• Thomas Hedegaard Bachmann · Freudenberg, DE
• Anders Steen Nielsen · Aarhus, DK

Key dates

• Filing date: Nov 5, 2018
• Grant date: Jul 12, 2022
• Expiry date: Jan 8, 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 method of controlling a wind turbine for the avoidance of edgewise vibrations. The method includes the steps of determining a whirling mode frequency of a rotor blade of the wind turbine; determining an avoidance zone based on the whirling mode frequency, the avoidance zone being a rotor speed range; receiving a rotor speed setpoint; and either adjusting the rotor speed to a value outside the rotor speed range if the rotor speed setpoint is within the rotor speed range or adjusting the rotor speed to a value corresponding to the rotor speed setpoint if the rotor speed setpoint is outside the rotor speed range.