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公开(公告)号：US11841002B2
公开(公告)日：2023-12-12
申请号：US18081411
申请日：2022-12-14
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Ole Damm Kristensen , Shirin Yousefizadeh
CPC classification number: F03D17/00 , F03D13/20 , F05B2260/821 , F05B2260/84 , F05B2270/303
Abstract: Method and apparatus for monitoring a wind turbine having an electrical component. An exterior temperature and power loss associated with the electrical component is obtained, and a thermal model describing the electrical component is executed, based on the exterior temperature and power loss, to determine an internal temperature of the electrical component. A further thermal model describing the electrical component is executed, based on the internal temperature and an exterior component temperature, to predict a future thermal condition of the electrical component in order to monitor operation of the wind turbine.
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公开(公告)号：US11211878B2
公开(公告)日：2021-12-28
申请号：US16992051
申请日：2020-08-12
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Cem Özgür Gerçek , Lars Helle , Duy Duc Doan , Tune Pedersen
Abstract: A Direct Current (DC) chopper may be integrated into the Modular Multilevel Converter (MMC) cells of a power converter. The integrated DC chopper may include chopper resistors that may also be advantageously integrated into a heat sink for a power module including at least the power transistors of the MMC cell. The safe discharge of both cell capacitors and DC-link capacitors in different operating conditions is performed using Insulated-Gate Bipolar Transistors (IGBTs) and chopper resistors of an MMC cell.
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公开(公告)号：US11563385B2
公开(公告)日：2023-01-24
申请号：US17562731
申请日：2021-12-27
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Cem Özgür Gerçek , Lars Helle , Duy Duc Doan , Tune Pedersen
Abstract: This disclosure proposes a topology that integrates a DC chopper into the Modular Multilevel Converter (MMC) cells of a power converter. The integrated DC chopper may include chopper resistors that may also be advantageously integrated into a heat sink for a power module including at least the power transistors of the MMC cell. Embodiments herein also describe a method for using an MMC cell's IGBTs and chopper resistors for providing a safe discharge of both cell capacitors and DC-link capacitors in different operating conditions.
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公开(公告)号：US11495967B2
公开(公告)日：2022-11-08
申请号：US17278208
申请日：2019-09-11
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Torsten Lund , Ciprian Biris , Kent Tange , Duy Duc Doan , Gert Karmisholt Andersen
Abstract: This invention relates to a method of controlling at least one wind turbine of a plurality of wind turbines connected to an electrical grid at a predefined point in the electrical grid. The wind turbine comprises a DC link connecting a generator side converter to a line side converter, where the line side converter is controlled according to a modulation index requested by a power converter controller. The method comprises determining a harmonic frequency signal indicative of a harmonic frequency value at the predefined point in the electrical grid; determining a deviation between the harmonic frequency signal and a permissible harmonic frequency value; determining a permissible modulation index based on the deviation; comparing the permissible modulation index to the modulation index requested by the power converter controller; and, altering a DC link voltage set-point based on the comparison between the permissible modulation index and the requested modulation index.
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公开(公告)号：US10855082B2
公开(公告)日：2020-12-01
申请号：US16099608
申请日：2017-05-16
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Gert Karmisholt Andersen , Uffe C. Merrild , Leif Svinth Christensen
Abstract: Aspects of the present invention relate to a method for controlling an amount of power to be delivered from a wind turbine generator to a power grid during an abnormal power grid event, the method comprising the steps of detecting an abnormal power grid event; controlling an active current delivered to the power grid in response to a measured or determined total active current; and controlling a reactive current delivered to the power grid in response to a measured or determined total reactive current. Aspects of the present invention further relate to a computer program product for carrying out the method as well as a wind turbine generator being capable of carrying out embodiments of the invention.
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Patent Agency Ranking
6.发明授权公开(公告)号：US12266940B2
公开(公告)日：2025-04-01
申请号：US17794203
申请日：2021-01-19
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Bo Sun
Abstract: A method of operating a power generating system for a wind turbine connected to an electrical grid, the power generating system comprising a power generator, a converter, a transformer and a tap changer, the method comprising; monitoring a signal for detecting an over-voltage condition in the electrical grid which requires a reduction in the output voltage from the power generating system; initiating a convertor response mode configured to provide at least part of the required voltage reduction; and initiating a transformer response mode configured to provide at least part of the required voltage reduction; wherein the transformer response mode comprises operating the tap changer to adjust the output voltage from the power generating system.
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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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