公开(公告)号：US20170370350A1

公开(公告)日：2017-12-28

申请号：US15539574

申请日：2015-12-16

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Ib Svend OLESEN ,  Avanindra GUPTA

IPC: F03D80/40 ,  F03D17/00

CPC classification number: F03D80/40 ,  F03D17/00 ,  F05B2260/80 ,  F05B2270/101 ,  F05B2270/304 ,  F05B2270/331 ,  F05B2270/708 ,  F05B2270/807 ,  F05B2270/808 ,  Y02E10/726

Abstract: The present invention provides a method of operating a wind turbine. The wind turbine comprises at least one rotatable blade. The method comprises the steps of providing a load sensor configured to generate a load signal representing loading on the blade, generating a first load signal when the blade is in a first position, and generating a second load signal when the blade is in a second position. Additionally, the method comprises steps of detecting a rotational speed of the blade, calculating a weight force on the blade based on the first and the second load signal, and calculating a centrifugal force on the blade based on the first and the second load signal. Subsequently, the weight force is compared with a predetermined weight force, and the centrifugal force is compared with a predetermined centrifugal force at the detected rotational speed. Finally, a risk of ice throw is determined based on the comparisons of the weight force and the centrifugal force with the predetermined forces.