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    A METHOD OF OPERATING A POWER GENERATION SYSTEM
    3.
    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
    4.
    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.

    CONTROLLED INRUSH CURRENT FOR CONVERTER-CONNECTED GRID FILTER
    5.
    发明申请
    CONTROLLED INRUSH CURRENT FOR CONVERTER-CONNECTED GRID FILTER 审中-公开
    用于转换器连接网状滤波器的受控冲击电流

    公开(公告)号：WO2016206688A1

    公开(公告)日：2016-12-29

    申请号：PCT/DK2016/050170

    申请日：2016-06-08

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： ABEYASEKERA, Tusitha ,  DOAN, Duy Duc ,  ANDERSEN, Gert Karmisholt ,  HELLE, Lars ,  PEDERSEN, Tune ,  NIELSEN, John Godsk ,  ANDERSEN, Søren

    IPC: H02J3/38 ,  F03D9/00 ,  H02J3/42 ,  H02H9/00

    CPC classification number: F03D7/0284 ,  F03D9/255 ,  H02H7/085 ,  H02H7/26 ,  H02H9/001 ,  H02J3/386 ,  H02J3/42 ,  Y02E10/72 ,  Y02E10/763

    Abstract: A method, converter arrangement, and controller are disclosed for connecting an output of a converter with an electrical grid to control inrush currents into a grid filter assembly connected with the output of the converter, the electrical grid carrying an alternating current (AC) signal having one or more phases. The method includes determining a voltage of the AC signal and operating, after pre-charging a direct current (DC) link of the converter to a predetermined voltage, the converter using open-loop voltage control to produce an AC output signal that substantially matches the AC signal of the electrical grid. The open-loop voltage control is based on the determined voltage of the AC signal. The method further includes closing, after a predetermined amount of time of operating the converter using the open-loop voltage control, a switching device to thereby connect the output of the converter with the electrical grid.

    Abstract translation: 公开了一种用于将转换器的输出与电网连接的方法，转换器布置和控制器，以控制与转换器的输出连接的电网滤波器组件的浪涌电流，电网承载交流（AC）信号，其具有 一个或多个阶段。 该方法包括确定AC信号的电压，并且在将转换器的直流（DC）链路预充电到预定电压之后，使用开环电压控制来操作，以产生基本匹配的转换器的AC输出信号 电网的交流信号。 开环电压控制基于所确定的AC信号电压。 该方法还包括在使用开环电压控制操作转换器的预定量的时间之后关闭开关装置，从而将转换器的输出与电网连接。

    WIND TURBINE CONVERTER CONTROL
    6.
    发明申请
    WIND TURBINE CONVERTER CONTROL 审中-公开
    风力涡轮机转换器控制

    公开(公告)号：WO2016165719A1

    公开(公告)日：2016-10-20

    申请号：PCT/DK2016/050102

    申请日：2016-04-11

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： NIELSEN, John Godsk ,  ANDERSEN, Søren ,  HELLE, Lars ,  DOAN, Duy Duc

    IPC: H02P27/00 ,  H02P29/02 ,  H02M7/493

    CPC classification number: H02M5/4585 ,  F03D9/255 ,  H02J3/386 ,  H02M7/493 ,  H02P27/00 ,  H02P27/04 ,  H02P29/02 ,  H02P29/032 ,  H02P2101/15 ,  H02P2201/03 ,  Y02E10/76

    Abstract: A method of controlling a full-scale converter system in which both the grid-side inverter unit and the generator-side inverter unit have a series-connection of parallel inverters and form a generator-side and grid-side voltage-center-point at a voltage level between the inverters connected in series. The voltage-center-points are electrically connected by a center-line conductor. Conversion operation with a de-rated maximum active power-output is performed in response to at least one of (i) the grid-side inverter and (ii) the generator-side inverter of the first converter-string being disabled, by disabling active power production of at least one of (i) the grid-side inverter and (ii) the generator-side inverter of the second converter-string, or correspondingly reducing active power production of the second converter-string, thereby preventing a compensation current along the center-line conductor.

    Abstract translation: 一种全格式转换器系统的控制方法，其中，电网侧逆变器单元和发电机侧逆变单元都具有并联逆变器的串联连接，并且形成发电机侧和电网侧电压中心点 串联连接的逆变器之间的电压电平。 电压中心点由中心线导体电连接。 响应于（i）电网侧逆变器和（ii）禁用第一转换器串的发电机侧逆变器中的至少一个，通过禁用有效功率输出来执行具有降额最大有功功率输出的转换操作 （i）电网侧逆变器和（ii）第二转换器串的发电机侧逆变器中的至少一个的功率产生，或相应地减小第二转换器串的有功功率产生，从而防止沿着 中线导体。

    CONVERTERS FOR WIND TURBINE GENERATORS
    7.
    发明申请
    CONVERTERS FOR WIND TURBINE GENERATORS 审中-公开
    风力发电机转换器

    公开(公告)号：WO2015055211A1

    公开(公告)日：2015-04-23

    申请号：PCT/DK2014/050331

    申请日：2014-10-14

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： ABEYASEKERA, Tusitha ,  DOAN, Duy Duc ,  HELLE, Lars ,  JØRGENSEN, Allan Holm ,  NIELSEN, John Godsk ,  ANDERSEN, Søren

    IPC: H02J3/28 ,  F03D9/00 ,  G01R19/165 ,  H02K19/34 ,  H02K21/48 ,  H02M1/12 ,  H02H7/12 ,  H02H7/26 ,  H02J3/38 ,  H02M7/49

    CPC classification number: H02M5/42 ,  F03D9/255 ,  G01R31/40 ,  H02H3/105 ,  H02H7/122 ,  H02J3/28 ,  H02J3/386 ,  H02M1/12 ,  H02M1/32 ,  H02M5/4585 ,  H02M7/219 ,  H02M7/23 ,  H02M7/493 ,  H02M2001/0077 ,  H02M2001/123 ,  H02M2007/4822 ,  H03H7/0107 ,  Y02E10/725 ,  Y02E10/726 ,  Y02E10/763 ,  Y02E10/766 ,  Y02E70/30

    Abstract: A wind turbine generator 1 supplies three-phase a.c. current of variable voltage and variable frequency to two pairs of rectifiers 4a, 4b and 4c, 4d which generate respective d.c. outputs connected to positive, negative and neutral d.c. conductors 6, 7, 8. The outputs from each pair of rectifiers are connected together, and the outputs from the two pairs are connected in series to create a high-voltage d.c. output. Inverters 10a, 10b, 10c, 10d then convert the d.c. power to a.c. at a fixed frequency and voltage suitable for connection to the mains grid. To reduce the effect of common-mode noise, a capacitor is connected between the 1 neutral conductor7 and earth, and a respective filter circuit 30 is connected between each of the a.c. outputs of the inverters 10a, 10b, 10c, 10d and earth. To reduce the effect of voltage surges during lightning, a surge protection device is also connected between the neutral d.c. conductor 7 and earth. Any imbalance in the current in the positive and negative conductors 6, 8 is compensated by detecting the presence of current flowing in the neutral conductor 7. Power supplied to auxiliary circuits from the output of one of the inverters, e.g. 10a, of the wind turbine is measured, and any resulting imbalance between the current in the positive and negative conductors is compensated. In the event of an earth-leakage fault in the conductors connecting the a.c. outputs of the inverters to the grid, when isolated, isolation detection relays 25 are provided.

    Abstract translation: 风力发电机1提供三相交流电。 可变电压和可变频率的电流为两对整流器4a，4b和4c，4d，它们产生相应的直流。 输出连接到正，负和中性直流。 导体6,7,8。每对整流器的输出连接在一起，两对的输出串联连接，以产生高压直流。 输出。 逆变器10a，10b，10c，10d然后转换直流。 权力到a.c. 以适合连接到电网的固定频率和电压。 为了降低共模噪声的影响，电容器连接在1个中性导体7和地之间，并且相应的滤波器电路30连接在每个交流电场之间。 逆变器10a，10b，10c，10d和地的输出。 为了减少雷击期间电压浪涌的影响，浪涌保护装置也连接在中性点间。 导体7和地球。 通过检测在中性导体7中流动的电流的存在来补偿正和负导体6,8中的电流的任何不平衡。从一个逆变器的输出，例如， 测量风力涡轮机的10a，并补偿正，负导体中的电流之间的任何不平衡。 在连接交流电的导体中发生漏电故障的情况。 当隔离的隔离检测继电器25被提供时，逆变器的输出到电网。

    WIND TURBINE GENERATOR FAULT PROTECTION SYSTEM
    8.
    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.

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