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    CONTROL OF A WIND TURBINE POWER GENERATION SYSTEM FOR OPTIMISING DC LINK VOLTAGE
    1.
    发明申请
    CONTROL OF A WIND TURBINE POWER GENERATION SYSTEM FOR OPTIMISING DC LINK VOLTAGE 审中-公开

    公开(公告)号：WO2020057704A1

    公开(公告)日：2020-03-26

    申请号：PCT/DK2019/050267

    申请日：2019-09-11

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： LUND, Torsten ,  BIRIS, Ciprian ,  TANGE, Kent ,  DOAN, Duy Duc ,  ANDERSEN, Gert Karmisholt

    IPC: H02J3/38 ,  H02J3/01

    Abstract: This invention relates to a method of controlling at least one wind turbine (10) of a plurality of wind turbines connected to an electrical grid (28) at a predefined point in the electrical grid (28). The wind turbine comprises a DC link (48) connecting a generator side converter (44) to a line side converter (46), where the line side converter (46) is controlled according to a modulation index requested by a power converter controller (56). The method comprises determining a harmonic frequency signal 66 indicative of a harmonic frequency value at the predefined point in the electrical grid (28); determining a deviation (70) between the harmonic frequency signal (66) and a permissible harmonic frequency value; determining a permissible modulation index (78) based on the deviation (70); comparing the permissible modulation index (78) to the modulation index requested by the power converter controller (56); and, altering a DC link (48) voltage set-point based on the comparison between the permissible modulation index (78) and the requested modulation index.

    WIND TURBINE GENERATOR FAULT PROTECTION SYSTEM
    2.
    发明申请
    WIND TURBINE GENERATOR FAULT PROTECTION SYSTEM 审中-公开

    公开(公告)号：WO2022008017A1

    公开(公告)日：2022-01-13

    申请号：PCT/DK2021/050225

    申请日：2021-07-06

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： CALHAU GONÇALVES, Luis Miguel ,  HANSEN, Kenneth G. ,  BISGAARD-CLAUSEN, Hans Christian ,  DOAN, Duy Duc ,  SOLTANI, Hamid ,  DYRLUND, Poul Møhl ,  TANGE, Kent

    IPC: H02H3/00 ,  H02H7/06

    Abstract: A system for a wind turbine, comprising a generator (28) connected to a power converter (30) by an electrical connection (32), a circuit breaker system (69) controlling the connection between the generator and the power converter through the electrical connection, and a sensor system (66) configured to sense operational parameters, wherein the generator is a permanent magnet generator. The system further comprises a protection system (61) interfaced to the circuit breaker system and the sensing system. The protection system is configured to determine an operational mode of the wind turbine (102) by monitoring at least two parameters of: the speed of the generator, the operational status of the power converter, and the operational status of the circuit breaker system, and defining an operational mode based on the monitored parameters, determine a parameter set comprising a plurality of operational parameters (104) based on the determined operational mode, and an associated set of expected values corresponding to the parameter set, wherein the determined parameter set includes generator voltage and generator speed, determine actual values corresponding to the determined parameter set (108), identify a fault condition in the event that the determined set of actual values of the operational parameters do not correspond to the determined set of expected values of the operational parameters, and implement a protection action based on the identified fault condition.

    A METHOD OF OPERATING A POWER GENERATION SYSTEM
    4.
    发明申请
    A METHOD OF OPERATING A POWER GENERATION SYSTEM 审中-公开

    公开(公告)号：WO2020057707A2

    公开(公告)日：2020-03-26

    申请号：PCT/DK2019/050274

    申请日：2019-09-19

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： BIRIS, Ciprian ,  TANGE, Kent ,  DOAN, Duy Duc ,  ANDERSEN, Gert Karmisholt ,  LUND, Torsten ,  MEYER, Lars

    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.

    WIND TURBINE WITH REDUCED DC-VOLTAGE RESERVE
    5.
    发明申请
    WIND TURBINE WITH REDUCED DC-VOLTAGE RESERVE 审中-公开

    公开(公告)号：WO2019120406A1

    公开(公告)日：2019-06-27

    申请号：PCT/DK2018/050329

    申请日：2018-12-06

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： BIRIS, Ciprian ,  TANGE, Kent ,  DOAN, Duy Duc ,  LUND, Torsten ,  ANDERSEN, Gert Karmisholt

    IPC: H02M7/5395 ,  H02M5/458 ,  H02P27/08 ,  F03D7/02 ,  H02J3/38 ,  H02P9/10 ,  G01R31/02

    Abstract: The invention relates to a method for operating a wind turbine which comprises a power generator, a generator side converter, a grid side converter, a DC link electrically connected to an output of the generator side converter and an input of the grid side converter. The method comprises monitoring a wind turbine signal for detection of an operational condition which requires an increase of an output voltage of the grid side converter, upon detection of the operational condition, initiate an over-modulation mode wherein the grid side converter is operated with a modulation index in an over-modulation range, and upon the detection of the operational condition, initiate a DC-voltage adjustment mode wherein the a DC-voltage of the DC link is increased from a first voltage level towards a second voltage level.

    A METHOD OF OPERATING A POWER GENERATION SYSTEM
    6.
    发明申请
    A METHOD OF OPERATING A POWER GENERATION SYSTEM 审中-公开

    公开(公告)号：WO2020057707A3

    公开(公告)日：2020-03-26

    申请号：PCT/DK2019/050274

    申请日：2019-09-19

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： BIRIS, Ciprian ,  TANGE, Kent ,  DOAN, Duy Duc ,  ANDERSEN, Gert Karmisholt ,  LUND, Torsten ,  MEYER, Lars

    IPC: H02M5/458 ,  H02M7/5387

    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.

    CONTROL OF A WIND TURBINE GENERATOR FOR REDUCED TONAL AUDIBILITY
    8.
    发明申请
    CONTROL OF A WIND TURBINE GENERATOR FOR REDUCED TONAL AUDIBILITY 审中-公开
    风力发电机组对降低声音信号的控制

    公开(公告)号：WO2018036596A1

    公开(公告)日：2018-03-01

    申请号：PCT/DK2017/050261

    申请日：2017-08-11

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： ANDERSEN, Gert Karmisholt ,  TANGE, Kent ,  ANDERSEN, Søren ,  DOAN, Duy Duc ,  BILTOFT, Jens Peter ,  HELLE, Lars ,  NIELSEN, John Godsk

    IPC: H02P9/02 ,  H02M5/44

    Abstract: A method of controlling a wind turbine generator (1) comprising an electrical generator (10) and a power converter (12), the power converter (12) comprising an electrical switch (14a, 14b) that is configured to process electrical power produced by the electrical generator (10), the method comprising: controlling an output from the electrical switch (14a, 14b) using a variable pulse-width modulated control signal, thereby to control characteristics of output power from the power converter (12); acquiring sample data (26) relating to an electronic signal within the wind turbine generator (1), wherein the sample data (26) is used for controlling the wind turbine generator (1); and dynamically adjusting a frequency (30) at which the sample data is acquired to synchronise data acquisition with a carrier frequency (24) of the control signal.

    Abstract translation: （10）和功率转换器（12）的风力涡轮发电机（1）的控制方法，所述功率转换器（12）包括电气开关（14a，14b），所述电气开关 被配置为处理由所述发电机（10）产生的电力，所述方法包括：使用可变脉宽调制控制信号来控制来自所述电开关（14a，14b）的输出，由此控制来自所述发电机 功率转换器（12）; 获取与所述风力涡轮发电机（1）内的电子信号有关的采样数据（26），其中所述采样数据（26）用于控制所述风力涡轮发电机（1）; 以及动态地调整采样数据被采集的频率（30）以使数据采集与控制信号的载波频率（24）同步。

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