公开(公告)号：US12241454B2

公开(公告)日：2025-03-04

申请号：US18263879

申请日：2022-01-20

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Bo Yin ,  Torsten Lund ,  Gert Karmisholt Andersen ,  Kouroush Nayebi ,  Manoj Gupta

IPC: F03D7/00 ,  F03D7/02 ,  H02J3/18

Abstract: The invention relates to wind turbines, particularly to controlling reactive power exchange between a power grid and a wind power plant. The wind power plant has a plurality of wind turbine generators each having a corresponding power converter with a converter controller. Further, the wind power plant has a power plant transformer with an on load tap changer coupled between the wind power plant and the power grid. The power plant controller is regulating the on load tap changer and is generating reactive component setpoints for the wind turbine generators, when determining a need for production of short-term reactive power due to a sudden change in reactive power measured at the point of common coupling.

公开(公告)号：US11901734B2

公开(公告)日：2024-02-13

申请号：US17832223

申请日：2022-06-03

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： John Godsk Nielsen ,  Torsten Lund ,  Hamid Soltani ,  Gert Karmisholt Andersen

IPC: H02J3/16

CPC classification number: H02J3/16 ,  H02J2300/28

Abstract: A grid side inverter system includes a grid side inverter, a phase locked loop controller arranged to determine a phase of a dq-frame dependent on a monitored grid voltage vector in the dq-frame and a reference grid voltage vector in the dq-frame, a current reference decision unit arranged to generate a reduction of at least one of an active and a reactive current reference, wherein a decision to generate the reduction is based on an electrical parameter relating to the phase difference of the monitored grid voltage vector and the PLL vector, a current controller arranged to determine control signals for the grid side inverter for controlling generation of active and reactive power to the grid dependent on the active and reactive current references and monitored active and a reactive grid currents in the dq-frame.

公开(公告)号：US12051907B2

公开(公告)日：2024-07-30

申请号：US17801772

申请日：2021-02-03

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Dan Wu ,  Germán Claudio Tarnowski ,  Torsten Lund ,  Kouroush Nayebi ,  Mu Wei ,  Uffe C Merrild

IPC: H02J3/38 ,  H02J3/46

CPC classification number: H02J3/381 ,  H02J3/46 ,  H02J2300/24 ,  H02J2300/28

Abstract: Controlling a current injected to a power grid from a renewable power plant, in response to a voltage event in the power grid. At least a current at a point of common coupling between the renewable power plant and the power grid is determined and provided to a power plant controller (PPC). The PPC derives individual current setpoint corrections for at least some wind turbines, based on the determined current, and dispatches each derived current setpoint correction to wind turbine controllers of the corresponding wind turbines. The wind turbine controllers control a current output of the respective wind turbines, based on measurements of current and/or voltage at a point of connection between the wind turbine and an internal grid of the renewable power plant, and by taking into account the dispatched current setpoint correction.

公开(公告)号：US11962262B2

公开(公告)日：2024-04-16

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 ,  F03D7/02 ,  F03D9/25 ,  F03D13/20 ,  F03D80/80 ,  H02P101/15 ,  H02P103/20

CPC classification number: H02P9/105 ,  F03D7/0284 ,  F03D9/25 ,  F03D13/20 ,  F03D80/82 ,  F05B2270/1033 ,  H02P2101/15 ,  H02P2103/20

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.

公开(公告)号：US11863112B2

公开(公告)日：2024-01-02

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

CPC classification number: H02P9/006 ,  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：US20230291204A1

公开(公告)日：2023-09-14

申请号：US18013837

申请日：2021-06-03

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Bo Yin ,  Kouroush Nayebi ,  Torsten Lund

IPC: H02J3/18 ,  H02J3/38

CPC classification number: H02J3/18 ,  H02J3/381 ,  H02J2203/10 ,  H02J2300/28

Abstract: Aspects of the present invention relate to a method for controlling a plurality of renewable energy generators. The method comprises: determining preliminary reactive power set points for the generators based on a reactive power reference value; determining generator-based and voltage-based reactive power limits for the generators; generating dispatch signals for requesting reactive power from the generators based on the preliminary set point and the limits; and dispatching the dispatch signals to the generators. The generator-based reactive power limits correspond to the reactive power capability of the generator. The voltage-based limits are determined by: determining a terminal voltage of the generator; comparing the determined terminal voltage to a voltage limit; and determining the voltage-based reactive power limit based on the comparison.

公开(公告)号：US11143167B2

公开(公告)日：2021-10-12

申请号：US16472371

申请日：2017-10-17

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Torsten Lund ,  John Godsk Nielsen

IPC: F03D17/00

Abstract: A method and apparatus for estimating a characteristic of a wind turbine electrical signal comprises buffering a sequence of sample values of the wind turbine electrical signal and a sequence of sample times corresponding with the sequence of sample values. The time periods represented by the sample times are variable. A sub-sequence of the buffered sample values to integrate is determined, based at least in part on a sum of the time periods. The characteristic is estimated by integrating the sample values in the sub-sequence.

公开(公告)号：US12212274B2

公开(公告)日：2025-01-28

申请号：US18040640

申请日：2021-08-03

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Torsten Lund ,  Hamid Soltani ,  Gert Karmisholt Andersen ,  Germán Claudio Tarnowski

IPC: H02P9/00 ,  H02P9/04 ,  H02P9/10 ,  H02P101/15

Abstract: Aspects of the present invention relate to a method for reducing high torque levels and/or high rates of change of torque in a wind turbine generator that comprises a machine-side converter and a line-side converter connected by a DC link, and, wherein the line-side converter is operated according to a virtual synchronous machine control scheme. The method comprises: determining a generator torque; determining a torque surplus indicating the amount that the generator torque exceeds a torque limit; determining an active power surplus corresponding to the torque surplus; controlling the line-side converter according to the virtual synchronous machine control scheme using an input parameter configured to reduce the active power output of the line side converter by the active power surplus.

公开(公告)号：US11955800B2

公开(公告)日：2024-04-09

申请号：US17923856

申请日：2021-05-06

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Torsten Lund ,  Germán Claudio Tarnowski ,  John Godsk Nielsen ,  Per Hagen Nielsen

IPC: H02J3/18 ,  H02J3/24 ,  H02J3/38

CPC classification number: H02J3/18 ,  H02J3/24 ,  H02J3/381 ,  H02J2300/28

Abstract: Aspects of the present invention relate to a method of voltage control for at least one wind turbine generator configured to absorb and supply reactive power on demand, the method comprises: receiving a dispatch signal from a power plant controller indicating a reactive power set point; determining a terminal voltage level of the at least one wind turbine generator; generating a reactive power correction value based on a deviation of the terminal voltage level from a voltage set point; adjusting the reactive power set point by the reactive power correction value; and controlling the at least one wind turbine generator according to the adjusted reactive power set point.

公开(公告)号：US11916392B2

公开(公告)日：2024-02-27

申请号：US17286802

申请日：2019-08-20

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Kouroush Nayebi ,  Mu Wei ,  Torsten Lund ,  Per Lund

IPC: H02J3/38 ,  H02J13/00 ,  G05B15/02

CPC classification number: H02J3/381 ,  G05B15/02 ,  H02J13/00002 ,  H02J2300/28

Abstract: Embodiments provide for the control of a power plant including several generators by setting a reference frame for the generators with a first and a second axis; measuring a grid demand voltage at the shared connection point; determining active and reactive currents required at the shared connection point based on the grid demand voltage and grid codes; transforming the active and reactive currents required at the shared connection point to the reference frame where the first axis defines a first current set point and the second axis defines a second current set point; and dispatching the first and second current set points to generator controllers associated with each generator. Current set points may be generated for positive/negative frames, direct quadrature frames, real/imaginary frames and may be set evenly for all generators or adjusted per generator.