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公开(公告)号：US20140339829A1
公开(公告)日：2014-11-20
申请号：US14362027
申请日：2012-12-07
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Duy Duc Doan
CPC classification number: F03D7/0296 , F03D7/0244 , F03D7/0264 , F03D7/0272 , F03D9/11 , F03D9/255 , H02P3/18 , H02P9/08 , Y02E10/723
Abstract: The present invention relates to a method for controlled shutdown of wind turbines. The method involves using a generator side converter, and optionally a DC chopper, as a generator load during controlled shutdown. In this way gearbox back-lashing and drive train oscillations can be avoided. The present invention also relates to a wind turbine capable of performing controlled shutdown in accordance with the before-mentioned method.
Abstract translation: 本发明涉及风力发电机的受控停机方法。 该方法包括在受控停机期间使用发电机侧转换器和可选的DC斩波器作为发电机负载。 这样就可以避免齿轮箱的回扣和传动系的摆动。 本发明还涉及一种能够根据前述方法执行受控停机的风力涡轮机。
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公开(公告)号：US11728741B2
公开(公告)日：2023-08-15
申请号：US17278161
申请日：2019-09-19
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Kent Tange , Duy Duc Doan , Gert Karmisholt Andersen , Torsten Lund , Lars Meyer
CPC classification number: H02M5/42 , F03D9/25 , H02M1/44 , H02P9/02 , F05B2220/706
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.
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公开(公告)号：US11611290B2
公开(公告)日：2023-03-21
申请号：US16957085
申请日：2018-12-06
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Kent Tange , Duy Duc Doan , Torsten Lund , Gert Karmisholt Andersen
IPC: H02M7/5395 , H02M5/458 , H02P27/08
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.
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公开(公告)号：US11502616B2
公开(公告)日：2022-11-15
申请号：US17278197
申请日：2019-09-11
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Kent Tange , Gert Karmisholt Andersen , Duy Duc Doan , Torsten Lund , Lars Meyer
Abstract: 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.
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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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Patent Agency Ranking
公开(公告)号：US10359025B2
公开(公告)日：2019-07-23
申请号：US15326801
申请日：2015-07-02
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Duy Duc Doan , John Godsk Nielsen , Per Bisgaard
Abstract: The present invention relates to a method for shutting down a wind power facility, said wind power facility comprising a power generator, a power converter comprising generator side and grid side converters being separated by an intermediate DC circuit, and power dissipation or power storage means being operatively connected to the intermediate DC circuit, the method comprising the steps of determining that the wind power facility needs to be shut down, and operating the generator side converter in accordance with a load time curve during shutdown of the wind power facility in order to avoid overloading of selected generator side converter components and the power dissipation or power storage means. Moreover, the present invention relates to a wind power facility for performing this method.
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公开(公告)号：US10250042B2
公开(公告)日：2019-04-02
申请号：US15521910
申请日：2015-10-19
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Tusitha Abeyasekera , Duy Duc Doan , Lars Helle , Søren Andersen , John Godsk Nielsen
Abstract: A wind turbine converter system with a rectifier and an inverter and a converter controller has at least first and second converter strings. The converter system is controlled by a master-converter controller and a slave-converter controller. The master-converter controller controls the first converter string and the slave-converter controller controls the second converter string. The master-converter controller receives commands from a superordinate wind turbine controller, provides the slave-converter controller with string-control commands on the basis of the superordinate control commands, and controls the conversion operation of the first converter string on the basis of the superordinate control command. The slave-converter controller receives the string-control commands from the master-converter controller and controls the conversion operation of the second converter string on the basis of the string-control commands received. The first and the second converter strings can be arranged in a bipolar configuration giving access to a neutral point. Fault detection can be performed based on current through the neutral. The system is capable of fault ride-through. Also, in case of failure of the master-converter controller, a redundant unit takes its place.
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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：US10859064B2
公开(公告)日：2020-12-08
申请号：US16474501
申请日：2017-11-29
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Duy Duc Doan , John Godsk Nielsen
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.
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公开(公告)号：US10700624B2
公开(公告)日：2020-06-30
申请号：US16326988
申请日：2017-08-11
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Gert Karmisholt Andersen , Kent Tange , Søren Andersen , Duy Duc Doan , Jens Peter Biltoft , Lars Helle , John Godsk Nielsen
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.
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