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公开(公告)号：US20220412321A1
公开(公告)日：2022-12-29
申请号：US17777345
申请日：2020-11-13
Applicant: Vestas Wind Systems A/S
Inventor： Alejandro Albert Martin Heinzmann , Brian Jørgensen
Abstract: A method of retrofitting a wind turbine (10) having a wind turbine tower (12) and a first energy generating unit (14) includes rotating at least a portion of the wind turbine tower (12). The wind turbine tower (12) is secured to a foundation (16) and has a first position on the foundation (16). The method includes rotating at least a portion of the wind turbine tower (12) from the first position to a second position. In the second position, the portion experiences less stress when the wind turbine (10) is operated in the same prevailing wind. The wind turbine tower (12) may have at least two sections (12a, 12b, 12c) and wherein rotating includes rotating one section relative to another section. One section may be secured to a foundation (16). In that case, rotating may or may not include rotating the section secured to the foundation (16). Rotating the tower may occur after the first energy generating unit (14) is removed from the tower and may include rotating the wind turbine tower by an angle from 90°±15° relative to the first position.
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公开(公告)号：US20220403829A1
公开(公告)日：2022-12-22
申请号：US17772301
申请日：2020-11-20
Applicant: Vestas Wind Systems A/S
Inventor： Torben Ladegaard Baun , Jesper Lykkegaard Neubauer , Renato Catroga
Abstract: A wind turbine nacelle configured for mounting on a wind turbine tower and for supporting a rotor-supporting assembly, the nacelle comprising a main unit, and at least one auxiliary unit. The auxiliary unit accommodates a at least one component, e.g. a converter or transformer. To provide efficient transportation, lower costs and easier assembly, the operative component is suspended directly on the main unit.
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公开(公告)号：US11530683B2
公开(公告)日：2022-12-20
申请号：US17251600
申请日：2019-06-07
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Christian Jeppesen , Fabio Caponetti
Abstract: Embodiments herein describe a hydraulic pitch system where a velocity (e.g., the velocity of a hydraulic cylinder or the piston rod in the cylinder) is fed forward and combined with a setting outputted by a pitch controller. The velocity of the hydraulic cylinder is derived from the reference pitch angle or a continuous pitch signal (e.g., a cyclic pitch or ramp rate) in the control system. In either case, the velocity can be determined by monitoring the change in the reference pitch angle or the continuous pitch signal. Using a gain control, the velocity is converted into a position setting of the hydraulic pitch system (e.g., a spool setting in a valve) which is combined with another position setting generated by the pitch controller.
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公开(公告)号：US20220399721A1
公开(公告)日：2022-12-15
申请号：US17624409
申请日：2020-06-19
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Per Hagen NIELSEN
IPC: H02J3/38 , G05B19/042 , G01R27/16
Abstract: Estimating components of a grid impedance, Z, of a power grid being coupled to a power generating unit at a point of interconnection is disclosed. A voltage, Vmeas, across the point of interconnection; an active current, IP, and/or an active power, P, delivered by the power generating unit to the power grid; and a reactive current, IQ, and/or a reactive power, Q, delivered by the power generating unit are determined. A parameter estimation vector is estimated using a recursive adaptive filter algorithm, and on the basis of Vmeas, IP, P, IQ and/or Q. A model representation of the power grid is created on the basis of the parameter estimation vector, and a system DC gain vector for the power grid is calculated, using the model representation. Finally, Z, and/or a resistance, R, of Z, and/or a reactance, X, of Z, is derived from the system DC gain vector.
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公开(公告)号：US11501913B2
公开(公告)日：2022-11-15
申请号：US16142839
申请日：2018-09-26
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Stig Lund Pallesgaard
IPC: H01F17/04 , H01F27/34 , H01F27/32 , H01F17/06 , H01F27/24 , H01F19/08 , H03K17/16 , H01F27/38 , H03K17/691 , H01F38/00
Abstract: A gatedriver circuit for controlling a power electronic switch. The circuit provides a galvanic separation and is magnetically immune. The gatedriver circuit comprises a transformer arranged with two separate cores of magnetically conductive material each forming a closed loop. A first electrical conductor has windings around a part of both cores, and a second electrical conductor also has windings around part of both cores. The two cores are positioned close to each other to allow mutual magnetic interaction. The windings of the first and second electrical conductors around the first core have the same winding direction, and the windings of the first and second electrical conductors around the second core have opposite winding direction of the windings of the first and second electrical conductors around the first core, so as to counteract electric influence induced by a common magnetic field through the closed loops of the first and second cores. Hereby, such gatedriver circuit is suitable for controlling power switches in environments with strong magnetic fields, e.g. inside a high power wind turbine.
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Patent Agency Ranking
公开(公告)号：US11496018B2
公开(公告)日：2022-11-08
申请号：US17420236
申请日：2020-01-08
Applicant: Vestas Wind Systems A/S
Inventor： Peter Mongeau , Lars Langvardt Krogh , Mustafa Gündüz , Xiaolu Ding , Ulrich Meinekat , Nicole Farell
Abstract: The invention relates to a generator for a wind turbine including a housing of substantially cuboidal form within which is mounted a stator. The stator has one or more multi-phase windings and a bus ring is provided for conveying electrical power from the windings to power take-off modules. One end of the power take-off modules is connected to the bus ring, and the other end of the modules has a plurality of power take-off interfaces for connection to power take-off cables. The distal ends of the power take-off modules are located in the corners of the cuboidal generator housing.
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公开(公告)号：US11495967B2
公开(公告)日：2022-11-08
申请号：US17278208
申请日：2019-09-11
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Torsten Lund , Ciprian Biris , Kent Tange , Duy Duc Doan , Gert Karmisholt Andersen
Abstract: This invention relates to a method of controlling at least one wind turbine of a plurality of wind turbines connected to an electrical grid at a predefined point in the electrical grid. The wind turbine comprises a DC link connecting a generator side converter to a line side converter, where the line side converter is controlled according to a modulation index requested by a power converter controller. The method comprises determining a harmonic frequency signal indicative of a harmonic frequency value at the predefined point in the electrical grid; determining a deviation between the harmonic frequency signal and a permissible harmonic frequency value; determining a permissible modulation index based on the deviation; comparing the permissible modulation index to the modulation index requested by the power converter controller; and, altering a DC link voltage set-point based on the comparison between the permissible modulation index and the requested modulation index.
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公开(公告)号：US11493027B2
公开(公告)日：2022-11-08
申请号：US16954365
申请日：2018-12-14
Applicant: Vestas Wind Systems A/S
Inventor： Martin Patrick Vcelka , Matthieu Alexandre
Abstract: A wind turbine has a nacelle which houses operative components such as a transformer or converter which in use generate unwanted heat, the nacelle including an external nacelle cover (20) to form the outer nacelle enclosure, and provided with a panel (24) which overlies a bottom cover (22) region forming therewith a conduit for directing external air to one or more of the heat generating operative components for cooling purposes.
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公开(公告)号：US11472067B2
公开(公告)日：2022-10-18
申请号：US15777266
申请日：2016-11-22
Applicant: Vestas Wind Systems A/S
Inventor： Frank Hoelgaard Hahn , Vijayasankar Irissappane
Abstract: A method of manufacturing a wind turbine blade body, the method comprising the steps of: providing a mould (40) having a mould surface (43) for forming a first blade body having a first length, the mould having a mould root end and a mould tip end (42); placing a removable insert (50) on the mould surface towards the mould tip end to form a modified mould surface for forming a second blade body having a second length which is less than the first length; and forming the second blade body on the modified mould surface.
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公开(公告)号：US11466659B2
公开(公告)日：2022-10-11
申请号：US17292812
申请日：2019-11-13
Applicant: Vestas Wind Systems A/S
Inventor： Torben Ladegaard Baun , Jesper Lykkegaard Neubauer , Leif Christoffersen , Per Holten-Møller , Anders Yde Wollesen
Abstract: A multirotor wind turbine (1) comprising a yaw arrangement (6) and a tower (2) is disclosed. A load carrying structure comprises first and second arms (3) extending from the yaw arrangement (6) and carrying energy generating units (4). the yaw arrangement (6) comprises an outer wall part (7) arranged coaxially with the tower (2) and forming a closed ring extending circumferentially about an outer surface of the tower (2), thereby forming a space (8) between the tower (2) and the outer wall part (7). The outer wall part (7) and the outer surface of the tower (2) are rotatable relative to each other.
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