公开(公告)号：US20180112646A1

公开(公告)日：2018-04-26

申请号：US15537648

申请日：2015-12-17

Applicant: Alstom Renewable Technologies Wind B.V.

Inventor： Jaume BETRAN PALOMAS ,  Pau NUALART ,  Jordi MERCADÉ

IPC: F03D7/02

CPC classification number: F03D7/0276 ,  F03D1/06 ,  F03D7/0224 ,  F03D7/026 ,  F03D9/25 ,  F05B2270/32 ,  Y02E10/723

Abstract: Methods of operating a wind turbine including one or more geared pitch systems. The method comprises a sub-nominal zone of operation for wind speeds below nominal and a supra-nominal zone of operation for wind speeds equal to or above the nominal. The sub-nominal zone of operation comprises a first operational range extending from a cut-in wind speed to a first wind speed and a second operational range extending from the first wind speed to a second wind speed, and the first operational range comprises two or more sub-ranges, wherein a different constant pitch position is defined for each of the sub-ranges. The method further comprises in the first operational range, using the geared pitch systems for setting the blades in the pitch position defined for each sub-range as a function of the current wind speed.