公开(公告)号：US20160252075A1

公开(公告)日：2016-09-01

申请号：US15027902

申请日：2014-10-06

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Thomas KRÜGER ,  Martin ATZLER ,  Poul Brandt CHRISTENSEN ,  Robert BOWYER

IPC: F03D7/02 ,  F03D1/00

CPC classification number: F03D7/0292 ,  F03D1/00 ,  F03D7/0224 ,  F03D17/00 ,  F05B2270/332 ,  Y02E10/723

Abstract: Methods and systems for controlling a wind turbine in a manner that takes into account the degree of loading of and damage to one or more components of the turbine are provided. An operational load on a wind turbine part is determined, and is used to compute a damage signal. The damage signal is indicative of the potential damage to the component or to the turbine as a whole that will result if action is not taken to reduce or mitigate the determined load. When the damage signal exceeds a pre-determined threshold, load-reducing wind turbine control means are activated to obviate the estimated damage.

Abstract translation: 提供了以考虑涡轮机的一个或多个部件的装载和损坏程度的方式控制风力涡轮机的方法和系统。 确定风力涡轮机部件上的操作负载，并用于计算损伤信号。 损坏信号表示如果不采取行动来减小或减轻所确定的负载，则整体将对部件或涡轮机造成潜在的损害。 当损伤信号超过预定阈值时，降低风力涡轮机控制装置被激活以消除估计的损坏。

公开(公告)号：US20170321660A1

公开(公告)日：2017-11-09

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 ,  G01P5/00 ,  G05B17/02 ,  F03D7/02

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：US20170314533A1

公开(公告)日：2017-11-02

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 ,  G05B19/402 ,  F03D17/00 ,  G01P5/00

CPC classification number: F03D7/0224 ,  F03D7/022 ,  F03D7/0276 ,  F03D7/046 ,  F03D17/00 ,  F05B2270/304 ,  F05B2270/32 ,  F05B2270/327 ,  F05B2270/328 ,  F05B2270/708 ,  G01P5/00 ,  G05B19/402 ,  G05B2219/2619 ,  Y02E10/723

Abstract: A method for iteratively 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 minimum tip speed ratio, λmin, is derived, based on an obtained pitch angle, θ. The minimum tip speed ratio, λmin, defines a limit between a stable and an unstable control region. An initial tip speed ratio, λinit>λmin, is selected, and an initial estimated wind speed, vinit, is derived based on the initial tip speed ratio, λint, and an obtained rotational speed, ω, of the rotor. An estimated wind speed, vest, is iteratively derived, based on the obtained rotational speed, ω, and the obtained pitch angle, ω, and using the derived initial estimated wind speed, vinit, as a starting point. The iterative process converges fast and reliably.

公开(公告)号：US20170074245A1

公开(公告)日：2017-03-16

申请号：US15125497

申请日：2015-02-23

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Erik Carl Lehnskov MIRANDA ,  Martin ATZLER ,  Shuang LI ,  Thomas SCHELL

IPC: F03D7/02

CPC classification number: F03D7/028 ,  F03D7/0224 ,  F05B2270/32 ,  F05B2270/3201 ,  Y02E10/723

Abstract: The invention relates to a method of controlling a wind turbine, the wind turbine comprising wind turbine blades attached to a rotor hub and a control system for pitching the blades relative to the rotor hub. The method comprises determining a wind speed and providing a normal pitch mode of operation to control the output power of the wind turbine, where the pitch mode of operation comprises pitch reference values in dependence of the wind speed. The output power of the turbine is controlled according to the normal pitch mode of operation as a function of the wind speed if the wind speed is lower than a first upper level wind speed threshold, and according to a modified mode of operation if the wind speed exceeds the first upper level threshold wind speed, wherein the modified mode of operation comprises decreasing the output power according to a de-rating function which is a function of time. The invention further relates to a control system for controlling a wind turbine according to the above mentioned control method.

Abstract translation: 本发明涉及一种控制风力涡轮机的方法，所述风力涡轮机包括附接到转子毂的风力涡轮机叶片和用于相对于转子毂倾斜叶片的控制系统。 该方法包括确定风速并提供正常的俯仰运行模式以控制风力涡轮机的输出功率，其中桨距运行模式包括根据风速的俯仰参考值。 如果风速低于第一上限风速阈值，则根据作为风速的函数的正常俯仰运行模式来控制涡轮机的输出功率，并且根据改变的操作模式，如果风速 超过第一上限阈值风速，其中修改的操作模式包括根据作为时间的函数的降额函数来降低输出功率。 本发明还涉及根据上述控制方法控制风力涡轮机的控制系统。