公开(公告)号：US20230050448A1

公开(公告)日：2023-02-16

申请号：US17787911

申请日：2020-12-18

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Esmaeil EBRAHIMZADEHVESHAREH ,  Torsten LUND ,  Mark FABER ,  Poul Brandt CHRISTENSEN ,  Gert Karmisholt ANDERSEN

IPC: F03D7/02 ,  H02P23/04

Abstract: The invention relates to a method for damping drive train oscillations of a VSM configured wind turbine. The method comprises determining a drive train damping power signal based on speed signal representing a generator speed, determining a power deviation based on a combination of a power reference for a desired power production, the drive train damping power-signal, a grid power supplied by the line side converter to the grid and a damping power, determining a virtual synchronous machine angle based on the power deviation so that the derivative of the virtual synchronous machine rotational speed is indicative of the power deviation, determining a converter reference for controlling the line side converter to generate the desired active power based on the virtual synchronous machine angle and a voltage reference for a voltage amplitude to be generated by the line side converter, and applying the converter reference to the line side converter.

公开(公告)号：US20220321041A1

公开(公告)日：2022-10-06

申请号：US17628174

申请日：2020-07-08

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Esmaeil EBRAHIMZADEHVESHAREH ,  Torsten LUND ,  John Godsk NIELSEN

IPC: H02P9/00 ,  H02P9/02

Abstract: The invention relates to controlling a power generating unit. Aspects of the invention include determining a virtual impedance value (Zvir), determining a virtual grid power (Pvsm) based on the virtual resistance value (Rvir) and the grid current (Igrid), determining a virtual synchronous machine rotational speed (ωVSM) and/or a synchronous machine angle (θVSM) of a virtual synchronous generator, and determining a voltage reference (Vabc) for controlling a line side converter to generate the desired reactive power (Qgrid) based on the virtual synchronous machine rotational speed or angle (ωVSM, θVSM), a virtual voltage (ΔVαβ, ΔVdq) and the voltage magnitude reference (Vqref).

公开(公告)号：US20230184218A1

公开(公告)日：2023-06-15

申请号：US17922413

申请日：2021-04-22

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Torsten LUND ,  John Godsk MIELSEN ,  Gert Karmisholt ANDERSEN ,  Kouroush NAYEBl ,  Poul Brandt CHRISTENSEN ,  Germán Claudio TARNOWSKl ,  Esmaeil EBRAHIMZADEHVESHAREH

IPC: F03D9/11 ,  H02J3/32 ,  H02J7/00 ,  H02P9/10 ,  F03D9/25

CPC classification number: F03D9/11 ,  H02J3/32 ,  H02J7/00712 ,  H02P9/105 ,  F03D9/255 ,  H02J2300/28 ,  H02J2207/20 ,  H02J2207/50 ,  H02P2101/15

Abstract: The invention relates to a method for controlling power generation of a VSM wind turbine. The wind turbine comprises a machine side converter, a line side converter, a DC link, and an electric storage device electrically connected to the DC link. The method comprises determining a first power control signal to the machine side converter, determining a second power control signal for controlling a desired output power of the line side converter based on a storage device voltage error, and a power production reference, and determining a charging current reference for controlling charging and discharging of the electric storage device based on a DC-link voltage error.

公开(公告)号：US20220069580A1

公开(公告)日：2022-03-03

申请号：US17419251

申请日：2019-12-16

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： John Godsk NIELSEN ,  Torsten LUND ,  Esmaeil EBRAHIMZADEHVESHAREH

IPC: H02J3/16 ,  H02J3/24 ,  H02J3/38 ,  H02K7/18 ,  F03D9/25 ,  F03D7/02

Abstract: The invention relates to a method for controlling a power generating unit such as a wind turbine which is configured as a virtual synchronous machine. Capacitor voltage signals obtained from voltage measurements of output capacitors are filtered in order to reduce a magnitude of an impedance peak and/or shift the impedance peak where the impedance peak is present in an impedance characteristic of the output of the power generating unit. Filter compensated voltage signals obtained from the output capacitors are combined with a voltage magnitude reference to obtain filtered capacitor voltage signals used for controlling the line side converter and thereby affect the impedance peak in a desired way.

公开(公告)号：US20250062709A1

公开(公告)日：2025-02-20

申请号：US18723359

申请日：2022-12-15

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Torsten LUND ,  John Godsk NIELSEN ,  Esmaeil EBRAHIMZADEHVESHAREH

IPC: H02P21/22 ,  F03D7/02 ,  H02P21/05 ,  H02P21/18 ,  H02P101/15 ,  H02P103/20

Abstract: Limiting generator loads in a wind turbine having a power converter with a line side inverter configured as a grid forming inverter. A maximum grid current value is determined based on a measured generator load and a limit function. A virtual impedance value and a virtual voltage drop over the virtual impedance value are determined. A virtual synchronous machine angle is determined based on a power reference and the virtual grid power. The voltage reference for controlling the line side inverter is determined based on the virtual synchronous machine angle, the virtual voltage drop and the voltage magnitude reference.

公开(公告)号：US20240079978A1

公开(公告)日：2024-03-07

申请号：US18506631

申请日：2023-11-10

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Esmaeil EBRAHIMZADEHVESHAREH ,  Torsten LUND ,  John Godsk NIELSEN

IPC: H02P9/00 ,  H02P9/02

CPC classification number: H02P9/006 ,  H02P9/02

Abstract: The invention relates to a method for controlling a power generating unit. The method includes determining a virtual impedance value, determining a virtual grid power based on the virtual resistance value and the grid current, determining a virtual synchronous machine rotational speed and/or a synchronous machine angle of a virtual synchronous generator, and determining a voltage reference for controlling a line side converter to generate the desired reactive power based on the virtual synchronous machine rotational speed or angle, a virtual voltage and the voltage magnitude reference.

公开(公告)号：US20220085740A1

公开(公告)日：2022-03-17

申请号：US17419244

申请日：2019-12-16

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： John Godsk NIELSEN ,  Torsten LUND ,  Esmaeil EBRAHIMZADEHVESHAREH

IPC: H02P9/10 ,  F03D9/25 ,  F03D7/02 ,  F03D13/20 ,  F03D80/80

Abstract: The invention relates to a method for controlling a wind turbine as virtual synchronous machine by determining the synchronous machine rotational speed rotational speed and the synchronous machine angle. The virtual synchronous machine rotational speed is determined based on a combination of a feedback of a damping power, a power reference for a desired power output of the wind turbine, a grid power supplied by the wind turbine to a power grid and a chopper power dissipated by the chopper and an inertial integration model, the synchronous machine angle is determined based on an integration of the synchronous machine rotational speed, and the damping power is determined based on the virtual synchronous machine rotational speed.