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11.发明公开公开(公告)号：US20240120740A1
公开(公告)日：2024-04-11
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
CPC classification number: H02J3/1878 , F03D7/0284
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.
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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
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.
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公开(公告)号：US20230178988A1
公开(公告)日：2023-06-08
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
CPC classification number: H02J3/18 , H02J3/381 , H02J3/24 , 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.
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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
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.
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Patent Agency Ranking
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.
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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
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.
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公开(公告)号：US20230089279A1
公开(公告)日：2023-03-23
申请号：US17801772
申请日：2021-02-03
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Dan WU , Germán TARNOWSKI , Torsten LUND , Kouroush NAYEBI , Mu WEI , Uffe C. MERRILD
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 power 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 .
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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
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.
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公开(公告)号：US20210351714A1
公开(公告)日：2021-11-11
申请号：US17278161
申请日：2019-09-19
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian BIRIS , Kent TANGE , Duy Duc DOAN , Gert Karmisholt ANDERSEN , Torsten LUND , Lars MEYER
Abstract: This invention concerns a method of controlling a power converter system 26 operating in an overmodulation region. The power converter system 26 comprises more than two current controllers 71, 73, 77, 79 a modulator 76 and a power converter 78, and the modulator 76 is configured to provide at least one modulated drive signal 87 to the power converter 78 based on voltage reference vector signals 82a, 82b, 82c, 82d from the more than two current controllers 71, 73, 77, 79. The method comprises determining the voltage reference vector signals 82a, 82b, 82c, 82d; determining compensated voltage reference vector signals 84a, 84b, 84c, 84d indicative of a fundamental frequency of a respective voltage reference vector signal 82a, 82b, 82c, 82d; and, determining the at least one modulated drive signal 87 based on a combination of the compensated voltage reference vector signals 84a, 84b, 84c, 84d.
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