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公开(公告)号：US10774809B2
公开(公告)日：2020-09-15
申请号：US16144451
申请日：2018-09-27
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Kent Tange , Duy Duc Doan , Torsten Lund , Gert Karmisholt Andersen
Abstract: Controlling a power converters during over voltage condition. A wind turbine signal is monitored for detection of an over voltage of the grid and upon detection of the over voltage, an over-modulation mode is initiated wherein the grid side converter is operated with a modulation index being increased in an over-modulation range at least during a sub-period of the over-modulation mode, and upon the detection of the operational condition, a DC-voltage adjustment mode is initiated wherein the DC voltage of the DC link is decreased from a second voltage level towards a first voltage level at least during a sub-period of the DC-voltage adjustment mode.
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公开(公告)号：US20140312622A1
公开(公告)日：2014-10-23
申请号：US14362052
申请日：2012-12-21
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Amit Kumar Gupta , Hock Heng Thia , Duy Duc Doan , Gert Karmisholt Andersen
IPC: F03D9/00
CPC classification number: F03D7/0264 , F03D9/255 , H02J3/386 , H02P9/08 , H02P29/024 , H02P29/0241 , Y02E10/723 , Y02E10/763
Abstract: A wind turbine is provided. The wind turbine comprises a generator, a power converter for converting at least a portion of electrical power generated by the generator, an energy dissipating unit and a controller. The power converter comprises a generator-side converter, a grid-side converter and a DC (direct current) link there between. The energy dissipating unit is operatively coupled to the DC-link The controller is adapted to activate the energy dissipating unit to dissipate energy from the DC-link in response to a shutdown request.
Abstract translation: 提供风力涡轮机。 风力涡轮机包括发电机，用于转换由发电机产生的电力的至少一部分的功率转换器，能量消散单元和控制器。 功率转换器包括发生器侧转换器，电网侧转换器和其间的DC（直流）连接。 能量消耗单元可操作地耦合到DC链路。控制器适于激活能量消耗单元以响应于关闭请求从DC链路消散能量。
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公开(公告)号：US12116985B2
公开(公告)日：2024-10-15
申请号：US17922413
申请日：2021-04-22
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Torsten Lund , John Godsk Nielsen , Gert Karmisholt Andersen , Kouroush Nayebi , Poul Brandt Christensen , Germán Claudio Tarnowski , Esmaeil Ebrahimzadehveshareh
IPC: F03D9/00 , F03D9/11 , F03D9/25 , H02P9/10 , H02J3/32 , H02J7/00 , H02P101/15 , H02P103/20
CPC classification number: F03D9/11 , F03D9/255 , H02P9/105 , F05B2270/1033 , H02J3/32 , H02J7/00712 , H02J2207/20 , H02J2207/50 , H02J2300/28 , H02P2101/15 , H02P2103/20
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：US12031523B2
公开(公告)日：2024-07-09
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
CPC classification number: F03D7/0272 , H02P23/04 , F05B2270/327
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.
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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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Patent Agency Ranking
公开(公告)号：US11286904B2
公开(公告)日：2022-03-29
申请号：US16957100
申请日：2018-12-05
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Gert Karmisholt Andersen , Lars Helle , Poul Møhl Dyrlund , Morteza Rabi , Duy Duc Doan
Abstract: A method for use in controlling a wind turbine generator of a wind power plant based on a condition of a power converter or a component forming part of a power converter in the wind power plant. The method comprises determining the initial condition of the power converter or a component forming part of a power converter and determining the evolution of the condition from the initial condition based on notional power reference values of the wind turbine generator. The method further comprises comparing the evolution of the condition to a predetermined threshold and determining, from the comparison, a time period by which the condition of the power converter or a component forming part of a power converter will substantially equal the predetermined threshold.
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公开(公告)号：US10855082B2
公开(公告)日：2020-12-01
申请号：US16099608
申请日：2017-05-16
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Gert Karmisholt Andersen , Uffe C. Merrild , Leif Svinth Christensen
Abstract: Aspects of the present invention relate to a method for controlling an amount of power to be delivered from a wind turbine generator to a power grid during an abnormal power grid event, the method comprising the steps of detecting an abnormal power grid event; controlling an active current delivered to the power grid in response to a measured or determined total active current; and controlling a reactive current delivered to the power grid in response to a measured or determined total reactive current. Aspects of the present invention further relate to a computer program product for carrying out the method as well as a wind turbine generator being capable of carrying out embodiments of the invention.
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18.发明授权公开(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
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：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.
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公开(公告)号：US11233400B2
公开(公告)日：2022-01-25
申请号：US16062888
申请日：2017-05-16
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Uffe C. Merrild , Leif Svinth Christensen , Gert Karmisholt Andersen
Abstract: Aspects of the present invention relate to a method for controlling an amount of reactive current provided from a wind turbine generator to a power grid during an abnormal power grid event, said wind turbine generator comprising a doubly-fed induction generator having a rotor and a stator, and a power converter coupling the rotor to the power grid, the power converter comprising a grid-side inverter, wherein the method comprises the step of balancing the reactive current provided to the power grid between a reactive stator current and a reactive grid-side inverter current, wherein the reactive grid-side inverter current is controlled in accordance with a reactive current capacity of a grid breaker receiving the reactive current provided by the grid-side inverter. Aspects of the present invention also relate to a wind turbine generator being capable of performing the method.
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