公开(公告)号：US11959460B2

公开(公告)日：2024-04-16

申请号：US17779114

申请日：2020-11-20

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Keld Hammerum ,  Christian Jeppesen ,  Jon Sowman

IPC: F03D7/02

CPC classification number: F03D7/0252 ,  F03D7/0224 ,  F05D2260/70

Abstract: Control of a wind turbine in a stop process where a stop controller is used to pitch the blades at a number of pre-set pitch rates including a first pitch rate and a second pitch rate. The stop controller is arranged to access desired pitch angles of the stopping process and add an envelope band to the desired pitch angles. In the stop process, pitching at a selected pitch rate among the number of pre-set pitch rates is performed, and the pitch rate is changed according to criteria to keep the pitch value within the envelope band.

公开(公告)号：US11841005B2

公开(公告)日：2023-12-12

申请号：US17758653

申请日：2021-01-12

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Julio Xavier Vianna Neto ,  Søren Dalsgaard ,  Ian Couchman ,  Jon Sowman

IPC: F03D7/02 ,  F03D1/02

CPC classification number: F03D7/0296 ,  F03D1/02 ,  F03D7/0224 ,  F05B2270/807

Abstract: Embodiments herein describe in-plane vibration damping techniques for MR turbines. The MR turbines can include arms that extend from a common tower and support multiple rotors. Because the rotors are disposed laterally away from the tower, side-to-side motion of the tower causes the rotors to have an angled trajectory that includes both lateral and vertical displacement. In addition, a rotor disposed on one side of the tower in MR turbine can have a very different trajectory than a rotor disposed on the opposite side of the tower. To account for the vertical displacement and the different trajectories, in one embodiment, a controller can use different phase offsets for each rotor when calculating pitch offsets for performing in-plane vibration damping. In another embodiment, the controller can use both the lateral and vertical accelerations of the rotors to identify the pitch offsets for the rotors to perform in-plane vibration damping.