中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

11 records (took 0.031 seconds)

    WIND TURBINE WITH VIRTUAL SYNCHRONOUS GENERATOR AND DC LINK CONTROL
    1.
    发明申请
    WIND TURBINE WITH VIRTUAL SYNCHRONOUS GENERATOR AND DC LINK CONTROL 审中-公开

    公开(公告)号：WO2020135905A1

    公开(公告)日：2020-07-02

    申请号：PCT/DK2019/050391

    申请日：2019-12-16

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： NIELSEN, John Godsk ,  LUND, Torsten ,  EBRAHIMZADEHVESHAREH, Esmaeil

    IPC: H02P9/00

    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 ωVSM and the synchronous machine angle θVSM. The virtual synchronous machine rotational speed ωVSM is determined based on a combination of a feedback of a damping power Pd, a power reference Pref for a desired power output of the wind turbine, a grid power Pgrid supplied by the wind turbine to a power grid and a chopper power Pchop dissipated by the chopper and an inertial integration model, the synchronous machine angle θVSM is determined based on an integration of the synchronous machine rotational speed ωVSM, and the damping power Pd is determined based on the virtual synchronous machine rotational speed ωVSM.

    POWER GENERATING UNIT WITH VIRTURAL SYNCHRONOUS GENERATOR WITH CURRENT LIMITATION
    3.
    发明申请
    POWER GENERATING UNIT WITH VIRTURAL SYNCHRONOUS GENERATOR WITH CURRENT LIMITATION 审中-公开

    公开(公告)号：WO2021008664A1

    公开(公告)日：2021-01-21

    申请号：PCT/DK2020/050209

    申请日：2020-07-08

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： EBRAHIMZADEHVESHAREH, Esmaeil ,  LUND, Torsten ,  NIELSEN, John Godsk

    IPC: H02J3/38 ,  H02J3/50 ,  H02J3/48 ,  H02J3/16

    Abstract: The invention relates to a method for controlling a power generating unit. The method includes 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).

    WIND TURBINE WITH VIRTUAL SYNCHRONOUS GENERATOR WITH DAMPING CONTROL
    4.
    发明申请
    WIND TURBINE WITH VIRTUAL SYNCHRONOUS GENERATOR WITH DAMPING CONTROL 审中-公开

    公开(公告)号：WO2021129914A1

    公开(公告)日：2021-07-01

    申请号：PCT/DK2020/050396

    申请日：2020-12-18

    Applicant: VESTAS WIND SYSTEMS A/S

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

    IPC: 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.

    VIRTUAL SYNCHRONOUS GENERATOR WITH ACTIVE DAMPING
    5.
    发明申请
    VIRTUAL SYNCHRONOUS GENERATOR WITH ACTIVE DAMPING 审中-公开

    公开(公告)号：WO2020135904A1

    公开(公告)日：2020-07-02

    申请号：PCT/DK2019/050390

    申请日：2019-12-16

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： EBRAHIMZADEHVESHAREH, Esmaeil ,  LUND, Torsten ,  NIELSEN, John Godsk

    IPC: H02J3/24 ,  H02J3/38 ,  H02J3/16

    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.

Patent Agency Ranking