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.

公开(公告)号：US09702343B2

公开(公告)日：2017-07-11

申请号：US14649865

申请日：2013-12-04

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Thomas Krüger ,  Fabio Caponetti

IPC: F03D7/02 ,  F03D7/04 ,  F03D9/00 ,  F03D9/25

CPC classification number: F03D7/0284 ,  F03D7/048 ,  F03D9/257 ,  F05B2270/337 ,  F05B2270/602 ,  Y02E10/723

Abstract: The present invention relates to a method for regulating a flow of power between a wind power facility and a power grid connected thereto. The method comprises the steps of determining whether power is to be delivered to or absorbed from the power grid, and at least partly disabling or at least partly enabling one or more power consuming auxiliary systems in response to said determination. Moreover, an arrangement for delivering additional power to a power grid is provided.