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).

公开(公告)号：WO2019120397A1

公开(公告)日：2019-06-27

申请号：PCT/DK2018/050301

申请日：2018-11-20

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： GUPTA, Manoj ,  KUMAR, Ravi ,  SIVASANKARAN, Janakiraman ,  GRAU, Thomas Schmidt ,  KJÆR, Martin Ansbjerg ,  NAYEBI, Kouroush ,  NIELSEN, John Godsk ,  THOMSEN, Jesper Sandberg

IPC: H02J3/12 ,  H02J3/24 ,  H02J3/00

Abstract: A method (200) for operating a renewable energy power plant comprising a plurality of renewable energy generators. The method comprises: identifying (202) a predetermined condition of the renewable energy power plant, of the grid, or of the connection between the renewable energy power plant and the grid, the predetermined condition indicating a weak grid interconnection between the renewable energy power plant and the grid; and controlling (206) each renewable energy generator in an adaptive active power mode in response to recovery of the grid from a voltage deviation. The adaptive active power mode comprises: determining (210) a thermal capacity of a chopper resistor of the renewable energy generator; calculating (212), based upon the determined thermal capacity, a limit level of rate of change of active power output that may be implemented by the renewable energy generator; and operating (214) the renewable energy generator to output active power at the calculated rate of change limit level.

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。

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。

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。

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.

公开(公告)号：WO2018121821A1

公开(公告)日：2018-07-05

申请号：PCT/DK2017/050399

申请日：2017-11-29

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： BIRIS, Ciprian ,  DOAN, Duy Duc ,  NIELSEN, John Godsk

IPC: H02M7/483 ,  H02J3/38 ,  H02M1/00

Abstract: A power conversion system for a wind turbine generator, comprising a machine-side converter having an AC voltage input from a generator and a DC voltage output to a DC link, wherein the machine-side converter is a modular multi-level converter comprising one or more converter legs corresponding to a respective one or more electrical phases of the generator, each of the converter legs comprising a plurality of converter cells, the system further comprising: a converter control module which provides the machine-side converter with a gate signal, and an electrical frequency estimation module configured to estimate the mean electrical frequency of the generator; wherein the gate signal has at least one mean switching frequency corresponding to at least one electrical phase of the generator; wherein the converter control module is configured to modulate the mean switching frequency of the gate signal in dependence on the mean electrical frequency of the generator.

公开(公告)号：WO2017092769A1

公开(公告)日：2017-06-08

申请号：PCT/DK2016/050407

申请日：2016-12-01

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： NIELSEN, John Godsk ,  DOAN, Duy Duc ,  ANDERSEN, Søren ,  ANDERSEN, Gert Karmisholt

IPC: F03D7/02 ,  F03D7/04 ,  H02J3/38

CPC classification number: H02J3/386 ,  F03D7/026 ,  F03D7/0264 ,  F03D7/042 ,  Y02E10/723 ,  Y02E10/763

Abstract: A method for controlling a wind turbine system including an electrical generator, a power converter system, a DC-link, and at least a grid-side breaker arrangement controllable between open and closed states, wherein the method comprises monitoring for the presence of a shutdown event and, in response to identifying the presence of a shutdown event, controlling the wind turbine into a production-ready state, comprising: i) controlling the grid-side breaker arrangement in the closed state; ii) disabling one or more drive signals to the power converter system; and iii) controlling the DC-link of the power converter system in a charged state. Advantageously, this approach reduces the frequency of use of the grid-side breaker arrangement which extends serviceable life considerably, and also allows the wind turbine system to be transitioned rapidly between an operating state and a production-ready state.

Abstract translation: 一种用于控制风力涡轮机系统的方法，所述风力涡轮机系统包括发电机，功率转换器系统，DC链路以及可控制在打开和闭合状态之间的至少一个网侧断路器装置，其中所述方法 包括：监测关闭事件的存在，并且响应于识别关闭事件的存在，将所述风力涡轮机控制到生产准备状态，所述方法包括：i）将所述电网侧断路器装置控制在所述关闭状态; ii）禁用到电力转换器系统的一个或多个驱动信号; 以及iii）控制功率转换器系统的DC链路处于充电状态。 有利的是，这种方法减少了大大延长使用寿命的电网侧断路器装置的使用频率，并且还允许风力涡轮机系统在运行状态和生产准备状态之间快速转换。

公开(公告)号：WO2016165720A1

公开(公告)日：2016-10-20

申请号：PCT/DK2016/050103

申请日：2016-04-11

Applicant: VESTAS WIND SYSTEMS A/S

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

IPC: H02J1/10 ,  H02J3/38

CPC classification number: H02J3/34 ,  H02J3/36 ,  H02J3/386 ,  H02M5/42 ,  H02M2001/325 ,  Y02E10/763 ,  Y02E60/60

Abstract: In a full-scale converter system 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 those of the inverters connected in series. The voltage-center-points are electrically connected by a center-line conductor that has a cross- section between 30% and 70% of that of a positive or negative potential conductor. The converter system continues conversion operation in the event of a fault in an inverter of a first converter-string, with non-faulty inverters of the converter system, as the center-line conductor is dimensioned by said cross-section to carry a compensation current resulting from an unbalanced active power-output.

Abstract translation: 在全尺寸转换器系统中，并网逆变器单元和发电机侧逆变器单元具有并联逆变器的串联连接，并形成发电机侧和电网侧的电压中心点， 逆变器串联连接。 电压中心点通过中心线导体电连接，中心线导体的横截面积为正或负电位导体的30％至70％。 在转换器系统的无故障逆变器的第一转换器串的逆变器发生故障的情况下，转换器系统继续转换操作，因为中心线导体的尺寸由所述横截面来承载补偿电流 由于有功功率不平衡导致的。

公开(公告)号：WO2016112915A1

公开(公告)日：2016-07-21

申请号：PCT/DK2016/050002

申请日：2016-01-06

Applicant: VESTAS WIND SYSTEMS A/S

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

IPC: G01R31/08 ,  F03D7/02 ,  F03D7/04 ,  H02J3/36 ,  H02J3/38 ,  H02J3/40 ,  G01R31/34 ,  F03D9/00

CPC classification number: H02P9/006 ,  F03D7/0264 ,  F03D7/0284 ,  F03D7/04 ,  F03D9/255 ,  G01R27/16 ,  G01R31/343 ,  G01R31/40 ,  G01R31/42 ,  H02J3/36 ,  H02J3/386 ,  H02K7/1838 ,  H02M5/4585 ,  H02P2101/15 ,  H02P2201/03 ,  Y02E10/723 ,  Y02E10/763 ,  Y02E60/60

Abstract: A method of monitoring a split wind-turbine-converter system with at least one generator-side converter and at least one grid-side converter arranged at distant locations, and a DC-link in the form of an elongated conductor arrangement with at least one positive and at least one negative conductor. The impedance of the DC-link conductor arrangement is determined by means of DC-voltage sensors. The voltages between the positive and the negative conductors are determined at the generator-side converter and at the grid-side converter, and the difference between the voltages is determined. The impedance of the DC-link conductor arrangement is determined by putting the determined voltage difference in relation to the DC current flowing through the DC-link conductor arrangement. If the impedance exceeds a given impedance threshold a fault state is recognized.

Abstract translation: 一种利用至少一个发电机侧转换器和布置在远处的至少一个电网侧转换器来监视分体风力涡轮转换器系统的方法，以及具有至少一个的细长导体装置形式的DC链路 正和至少一个负导体。 直流母线布置的阻抗由直流电压传感器决定。 在发电机侧转换器和电网侧转换器处确定正导体和负导体之间的电压，并且确定电压之间的差。 通过将所确定的电压差相对于流过直流链导体装置的直流电流来确定直流母线布置的阻抗。 如果阻抗超过给定的阻抗阈值，则识别故障状态。