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1. 发明授权

US11411519B2 Method for handling sub-synchronous resonances 有权
公开(公告)号：US11411519B2
公开(公告)日：2022-08-09
申请号：US16590475
申请日：2019-10-02
申请人： VESTAS WIND SYSTEMS A/S
发明人： Poul Møhl Dyrlund , Gert Karmisholt Andersen , Torsten Lund , Hamid Soltani
IPC分类号： G05B19/048 , H02P9/00 , G05B15/02 , H02P101/15
摘要： The present invention relates to a method of controlling a doubly fed induction generator wind turbine converter system in case of a sub-synchronous resonance event, the method comprising the steps of detecting the sub-synchronous resonance event, and switching from a first control mode to a second control mode in response to detecting the predetermined event, wherein the second control mode comprises the step of setting at least one rotor current controller parameter on the basis of a generator speed of the doubly fed induction generator. The predetermined event may also be a fault ride through event. The present invention further relates to a doubly fed induction generator wind turbine converter system being capable of handling such events.

2. 发明授权

US11038400B2 Control of a wind turbine based on a combined power reference 有权
公开(公告)号：US11038400B2
公开(公告)日：2021-06-15
申请号：US16720128
申请日：2019-12-19
申请人： VESTAS WIND SYSTEMS A/S
发明人： Poul Brandt Christensen , Jesper Sandberg Thomsen , Gert Karmisholt Andersen
IPC分类号： H02K7/18 , F03D9/25 , F03D80/80 , F03D7/02 , H02P9/02
摘要： A method of controlling a wind turbine is provided. The method comprises providing a primary power reference signal and a secondary power reference signal. The primary power reference signal is limited according to a primary signal limit. The secondary power reference signal is limited according to a secondary signal limit. The primary power reference signal and the secondary power reference signal are combined to provide a combined power reference signal, which is provided to a power or torque control system of the wind turbine.

3. 发明授权

US10590914B2 Controlled inrush current for converter-connected grid filter 有权
公开(公告)号：US10590914B2
公开(公告)日：2020-03-17
申请号：US15572256
申请日：2016-06-08
申请人： VESTAS WIND SYSTEMS A/S
发明人： Tusitha Abeyasekera , Duy Duc Doan , Gert Karmisholt Andersen , Lars Helle , Søren Andersen , Tune Pedersen , John Godsk Nielsen
IPC分类号： H03K17/945 , H03K17/955 , F03D7/02 , H02J3/38 , H02J3/42 , H02H7/26 , F03D9/25 , H02H9/00 , H02H7/085
摘要： 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.

4. 发明授权

US10199970B2 Method for handling an over voltage ride through event 有权
公开(公告)号：US10199970B2
公开(公告)日：2019-02-05
申请号：US15563754
申请日：2016-03-08
申请人： VESTAS WIND SYSTEMS A/S
发明人： Gert Karmisholt Andersen , Leif Svinth Christensen , Ciprian Biris , Uffe C. Merrild
IPC分类号： H02P9/00 , H02P9/04 , H02P9/10
摘要： The present invention relates to a method for operating a doubly fed induction generator wind power facility during an OVRT event, said the wind turbine facility being adapted to inject active and/or reactive current into an associated grid, the method comprising the steps of determining the occurrence of an over voltage grid event, and maintaining a grid-side inverter of the doubly fed induction generator wind power facility fully operable during the over voltage ride though event so as to maintain a controllable active and/or reactive current capability during the over voltage grid event.

5. 发明授权

US09476408B2 Method of controlling a wind turbine generator and apparatus for controlling electric power generated by a wind turbine generator 有权
标题翻译：控制风力发电机的控制方法以及用于控制风力发电机产生的电力的装置
公开(公告)号：US09476408B2
公开(公告)日：2016-10-25
申请号：US14206113
申请日：2014-03-12
申请人： VESTAS WIND SYSTEMS A/S
发明人： Shu Yu Cao , Anshuman Tripathi , Kim B. Larsen , Gert Karmisholt Andersen , Lars Helle
IPC分类号： F03D7/02 , H02J3/38 , H02P9/48 , H02P21/14 , H02P101/15
CPC分类号： F03D7/0272 , H02J3/386 , H02P9/48 , H02P21/141 , H02P2101/15 , Y02E10/763
摘要： A method of controlling a wind turbine generator is provided, the wind turbine generator converting mechanical energy to electrical. The method comprises: determining an electromagnetic power reference representing the electromagnetic power generated by the wind turbine generator, wherein the electromagnetic power reference is determined based on a desired output of the wind turbine generator; controlling the electrical power generated by the wind turbine generator using a control signal, wherein the control signal is derived from the electromagnetic power reference and is modified in dependence on an inverse power function of the wind turbine generator by incorporating minimal copper loss constraint and stator voltage limiting constraint such that non-linearity of the wind turbine generator is compensated in the control loop and it operates at its maximum efficiency. One effect of the method is that classical linear control loop design can be employed in spite of the plant being a non-linear identity.
摘要翻译：提供了一种控制风力发电机的方法，风力发电机将机械能转换为电力。该方法包括：确定表示由风力涡轮发电机产生的电磁功率的电磁功率参考，其中基于风力涡轮发电机的期望输出来确定电磁功率基准; 使用控制信号来控制由风力涡轮发电机产生的电力，其中控制信号是根据电磁功率参考导出的，并且根据风力涡轮发电机的反功率函数，通过并入最小铜损约束和定子电压使得风力涡轮发电机的非线性在控制回路中得到补偿，并以其最大效率运行。该方法的一个效果是尽管植物是非线性身份，但是可以采用经典的线性控制回路设计。

6. 发明授权

US09347434B2 Wind turbine and a method of operating thereof 有权
标题翻译：风力发电机及其运行方法
公开(公告)号：US09347434B2
公开(公告)日：2016-05-24
申请号：US14362052
申请日：2012-12-21
申请人： VESTAS WIND SYSTEMS A/S
发明人： Amit Kumar Gupta , Hock Heng Thia , Duy Duc Doan , Gert Karmisholt Andersen
IPC分类号： F03D9/00 , H02J3/38 , F03D7/02 , H02P29/02 , H02P9/08
CPC分类号： F03D7/0264 , F03D9/255 , H02J3/386 , H02P9/08 , H02P29/024 , H02P29/0241 , Y02E10/723 , Y02E10/763
摘要： 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.
摘要翻译：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。控制器适于响应于关闭请求而激活能量消散单元以从DC链路消散能量。

7. 发明授权

US11728741B2 Method of operating a power generation system 有权
公开(公告)号：US11728741B2
公开(公告)日：2023-08-15
申请号：US17278161
申请日：2019-09-19
申请人： VESTAS WIND SYSTEMS A/S
发明人： Ciprian Biris , Kent Tange , Duy Duc Doan , Gert Karmisholt Andersen , Torsten Lund , Lars Meyer
IPC分类号： H02M5/42 , H02P9/02 , H02M1/44 , F03D9/25
CPC分类号： H02M5/42 , F03D9/25 , H02M1/44 , H02P9/02 , F05B2220/706
摘要： 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.

8. 发明授权

US11611290B2 Wind turbine with reduced DC-voltage reserve 有权
公开(公告)号：US11611290B2
公开(公告)日：2023-03-21
申请号：US16957085
申请日：2018-12-06
申请人： VESTAS WIND SYSTEMS A/S
发明人： Ciprian Biris , Kent Tange , Duy Duc Doan , Torsten Lund , Gert Karmisholt Andersen
IPC分类号： H02M7/5395 , H02M5/458 , H02P27/08
摘要： 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.

9. 发明授权

US11502616B2 Method of operating a power generation system in an overmodulation range 有权
公开(公告)号：US11502616B2
公开(公告)日：2022-11-15
申请号：US17278197
申请日：2019-09-11
申请人： VESTAS WIND SYSTEMS A/S
发明人： Ciprian Biris , Kent Tange , Gert Karmisholt Andersen , Duy Duc Doan , Torsten Lund , Lars Meyer
IPC分类号： H02M5/458 , H02P9/02
摘要： This invention concerns a method of controlling a line side converter of a power converter system operating in an over-modulation range. The line side converter comprises a controller comprising a feedback control module configured to output a feedback control signal for modifying a drive signal received by a modulator. The method comprises determining a modulation index within the over-modulation range; and, controlling the feedback control module to adjust the feedback control signal based on the modulation index.

10. 发明授权

US10774809B2 Controlling a wind turbine during over-voltage ride through 有权
公开(公告)号：US10774809B2
公开(公告)日：2020-09-15
申请号：US16144451
申请日：2018-09-27
申请人： VESTAS WIND SYSTEMS A/S
发明人： Ciprian Biris , Kent Tange , Duy Duc Doan , Torsten Lund , Gert Karmisholt Andersen
IPC分类号： F03D7/02 , H02J3/38 , H02J3/18
摘要： 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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