Method for damping tower oscillations, an active stall controlled wind turbine and use hereof
US7919880B2 · kind B2 · utility
10Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2009 |
| Grant date | Apr 5, 2011 |
| Priority date | — |
| Expiry date | Apr 24, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/72
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for damping tower oscillations in the tower of an active stall controlled wind turbine. The method comprises the steps of operating two or more blades of the wind turbine in a stall condition, detecting if the tower oscillates beyond a predefined level, and establishing different stall conditions between at least two of the blades, wherein the different stall conditions are established by offsetting the pitch angle of at least a first blade in relation to the pitch angle of one further blade. The invention further relates to an active stall controlled wind turbine and use hereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.