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：US09835137B2

公开(公告)日：2017-12-05

申请号：US14406409

申请日：2013-06-07

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Martin Atzler ,  Per Brath ,  Thomas Krüger ,  Ali Zaib

IPC: F03D7/04 ,  F03D7/02

CPC classification number: F03D7/044 ,  F03D7/0224 ,  F03D7/024 ,  F03D7/0296 ,  F03D7/043 ,  F05B2260/966 ,  F05B2270/331 ,  Y02E10/723

Abstract: A method of operating a wind turbine is provided. The wind turbine comprises a turbine rotor with at least two blades, each blade having a variable pitch angle. The method comprises determining mechanical loads on the blades, determining an asymmetric load moment experienced by the turbine rotor based on the mechanical loads on the blades, determining high order harmonics from the asymmetric load moment, and determining an individual pitch control signal for each of the blades for varying the pitch angle of each blade to compensate for the asymmetric load moment. The individual pitch control signal for each blade is determined at least based on the high order harmonics.

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：US20150132129A1

公开(公告)日：2015-05-14

申请号：US14406409

申请日：2013-06-07

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Martin Atzler ,  Per Brath ,  Thomas Krüger ,  Ali Zaib

IPC: F03D7/04 ,  F03D7/02

CPC classification number: F03D7/044 ,  F03D7/0224 ,  F03D7/024 ,  F03D7/0296 ,  F03D7/043 ,  F05B2260/966 ,  F05B2270/331 ,  Y02E10/723

Abstract: A method of operating a wind turbine is provided. The wind turbine comprises a turbine rotor with at least two blades, each blade having a variable pitch angle. The method comprises determining mechanical loads on the blades, determining an asymmetric load moment experienced by the turbine rotor based on the mechanical loads on the blades, determining high order harmonics from the asymmetric load moment, and determining an individual pitch control signal for each of the blades for varying the pitch angle of each blade to compensate for the asymmetric load moment. The individual pitch control signal for each blade is determined at least based on the high order harmonics.

Abstract translation: 提供了一种操作风力涡轮机的方法。 风力涡轮机包括具有至少两个叶片的涡轮转子，每个叶片具有可变的俯仰角。 该方法包括确定叶片上的机械载荷，基于叶片上的机械负载确定涡轮转子经历的不对称载荷力矩，从非对称载荷力矩确定高次谐波，以及确定每个 用于改变每个叶片的俯仰角以补偿不对称载荷力矩的叶片。 至少基于高阶谐波确定每个叶片的各个俯仰控制信号。