Method for ascertaining a value of an ice buildup quantity on at least one rotor blade of a wind turbine, and use thereof

US10865778B2 · kind B2 · utility

Assignee

• FOS4X GMBH · DE

Inventors

• Mathias Müller · Viersen, DE
• Thomas Schauss · Gilching, DE
• Florian Rieger · Karlsruhe, DE

Key dates

• Filing date: Dec 5, 2016
• Grant date: Dec 15, 2020
• Expiry date: Jan 27, 2037

Classification

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

Abstract

Embodiments of the invention describe a method for ascertaining a value of an ice buildup quantity on at least one rotor blade (111, 112) of a wind turbine (100) and to the use thereof. The method has the steps of ascertaining a base value (G) for at least one natural frequency of the rotor blade when vibrations are excited in an ice buildup-free state; ascertaining a shift base factor for shifting the at least one natural frequency relative to the ice buildup-free state in the event of an ice buildup quantity which is increased by a specific value; detecting a measurement value or a measurement value curve of a measurement variable which is suitable for determining the current natural frequency of the rotor blade (111, 112); determining the current natural frequencies of the rotor blade (111, 112); and deriving a current shift factor by comparing the current natural frequencies with the base value (G), comparing the current shift factor with the shift base factor, and deriving a value for the ice buildup quantity using the comparison.