公开(公告)号：US20170122289A1

公开(公告)日：2017-05-04

申请号：US15320209

申请日：2015-06-15

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Jacob Krogh KRISTOFFERSEN ,  Søren SØRENSEN

IPC: F03D7/02 ,  F03D7/04 ,  F03D1/06

CPC classification number: F03D7/0224 ,  F03D1/0675 ,  F03D7/024 ,  F03D7/047 ,  F05B2270/20 ,  F05B2270/304 ,  F05B2270/32 ,  F05B2270/327 ,  F05B2270/328 ,  F05B2270/329 ,  F05B2270/331 ,  Y02E10/721 ,  Y02E10/723

Abstract: A wind turbine is controlled in response to an estimate of vertical and/or horizontal wind shear. A tilt moment is estimated from flapwise and edgewise blade bending moments, azimuth and blade pitch positions and used to estimate vertical wind shear. A yaw moment is also estimated from flapwise and edgewise blade bending moments, azimuth and pitch position and used to estimate horizontal wind shear. A tip speed ratio is determined from an estimate of wind velocity over the rotor plane and is used to set a blade pitch angle which is passed to a blade pitch controller. The pitching may be collective or individual. In the latter case, the tip speed ratio is determined from a plurality of rotor plane positions to derive a cyclic pitch reference for each blade.