公开(公告)号：US10557456B2

公开(公告)日：2020-02-11

申请号：US15039769

申请日：2014-11-27

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Martin Ansbjerg Kjær ,  Carsten Nørlund Thomsen ,  Robert Bowyer ,  Jesper Sandberg Thomsen

IPC: G05D3/12 ,  G05D5/00 ,  G05D9/00 ,  G05D11/00 ,  G05D17/00 ,  F03D7/02 ,  F03D1/06 ,  F03D7/04 ,  G05B19/406

Abstract: Embodiments of the present disclosure generally relate to apparatus and methods for preventing power dips associated with power ramping in wind turbines. One embodiment of the present disclosure provides a method for stabilizing power output in a wind turbine, which includes tracking a rate of change in an external reference, such as an external power reference or external torque reference, computing a feed-forward pitch angle adjustment according to the rate of change in the external power reference, and sending the feed-forward pitch angle adjustment to the wind turbine to adjust a pitch angle of rotor blades simultaneously with adjusting power output according to the external reference.

公开(公告)号：US10662924B2

公开(公告)日：2020-05-26

申请号：US15037902

申请日：2014-11-19

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Fabio Caponetti ,  Ian Couchman ,  Thomas Krüger ,  Ali Zaib ,  Carsten Nørlund Thomsen

IPC: F03D9/00 ,  H02P9/04 ,  F03D7/02 ,  F03D9/25 ,  H02J11/00 ,  H02K7/18

Abstract: The invention relates to a control apparatus and method for controlling the rotor blades of a wind turbine, and in particular to controlling the rotor blades during an extreme wind event. An extended mode of operation of the wind turbine rotor beyond the cut-out wind speed is provided. In the extended mode of operation, the pitch of the wind turbine blades is actively controlled so that the rotor and the generator idle at a designated rotational speed. The rotational speed may be relatively high, say 15 to 20% of the nominal speed, compared with minimal speeds experienced by purely feathered wind turbine blades, and may be further controlled as a function of the incident wind speed. Output power control in the extended mode may be zero but is preferably a low, but non-zero value. The output power so produced may then be used as an auxiliary power source for controlling the wind turbine in situations where the utility grid fails.