公开(公告)号：US11441542B2

公开(公告)日：2022-09-13

申请号：US15528450

申请日：2015-11-20

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Martin Atzler ,  Thomas Scheel ,  Lars Finn Sloth Larsen

IPC: F03D17/00 ,  F03D7/02 ,  G01P5/00 ,  G05B17/02

Abstract: A method for estimating a wind speed at a wind turbine is disclosed, said wind turbine comprising a rotor carrying a set of wind turbine blades, each wind turbine blade having a variable pitch angle. A blade torsion contribution, representing torsion introduced in the wind turbine blades, is derived, based on an obtained rotational speed, ω, of the rotor, and an obtaining a pitch angle, θ, of the wind turbine blades. An adjusted pitch angle, θ′, is calculated as a sum of the obtained pitch angle, θ, and the derived blade torsion contribution, and a wind speed, vest, is estimated, based on the obtained rotational speed, ω, and the calculated adjusted pitch angle, θ′. An accurate and reliable estimate for the wind speed is thereby obtained. The wind turbine may be controlled in accordance with the estimated wind speed, vest.

公开(公告)号：US10443567B2

公开(公告)日：2019-10-15

申请号：US15528441

申请日：2015-11-20

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Martin Atzler ,  Thomas Scheel ,  Lars Finn Sloth Larsen ,  Thomas Krüger

IPC: F03D7/02 ,  F03D17/00 ,  F03D7/04 ,  G01P5/00 ,  G05B19/402

Abstract: A fast-converging and reliable method for estimating a wind speed at, for example, a wind turbine comprising a rotor carrying a set of variable pitch angle wind turbine blades. The estimated wind speed is iteratively derived using a wind turbine rotor rotational speed, a turbine blade pitch angle, and a derived initial estimated wind speed. The initial estimated wind speed is based on the rotational speed and an initial tip speed ratio. The initial tip speed ratio is selected to be a value greater than a minimum tip speed ratio, wherein the minimum tip speed ratio defines a control region stability limit as a function of the pitch angle. Thus, for a given pitch angle, a minimum tip speed ratio is derived as a limit or boundary point between a stable control region and an unstable control region.