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公开(公告)号：US12264647B1
公开(公告)日：2025-04-01
申请号：US18885286
申请日：2024-09-13
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Andreas Langbak , Peter Mongeau , Ciprian Biris , Kent Tange
Abstract: A method for tracking a gear tooth meshing angle of a gearbox of a wind turbine is disclosed. An initial reference virtual gear tooth meshing angle of the gearbox is selected, and an angular position of a high speed shaft and/or a low speed shaft of the gearbox is monitored. A virtual gear tooth meshing angle relative to the reference virtual gear tooth meshing angle is estimated, based on the monitored angular position of the high speed shaft and/or the low speed shaft and on information regarding topology of the gearbox. A number of full rotations of the high speed shaft and/or the low speed shaft which corresponds to an integer number of full periods of gear meshing of the gearbox is calculated, and the reference virtual gear tooth meshing angle is reset each time the high speed shaft and/or the low speed shaft has performed the calculated number of full rotations. The estimated virtual gear tooth meshing angle is applied to a periodic noise signal of the wind turbine.
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12.发明授权公开(公告)号：US12237687B2
公开(公告)日：2025-02-25
申请号：US17794226
申请日：2021-01-19
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Bo Sun , Ciprian Biris , Catalin Gabriel Dincan , Philip Carne Kjær
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; when operating the power generating system in a grid-forming configuration, monitoring a signal for detecting a voltage of the electrical grid which requires an increase in output voltage from the power generating system in order to maintain the grid voltage within a predetermined voltage range; and operating the tap changer to tap-up the transformer to provide at least part of the voltage increase required to maintain the grid voltage within the predetermined voltage range.
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公开(公告)号：US11233400B2
公开(公告)日：2022-01-25
申请号：US16062888
申请日：2017-05-16
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Uffe C. Merrild , Leif Svinth Christensen , Gert Karmisholt Andersen
Abstract: Aspects of the present invention relate to a method for controlling an amount of reactive current provided from a wind turbine generator to a power grid during an abnormal power grid event, said wind turbine generator comprising a doubly-fed induction generator having a rotor and a stator, and a power converter coupling the rotor to the power grid, the power converter comprising a grid-side inverter, wherein the method comprises the step of balancing the reactive current provided to the power grid between a reactive stator current and a reactive grid-side inverter current, wherein the reactive grid-side inverter current is controlled in accordance with a reactive current capacity of a grid breaker receiving the reactive current provided by the grid-side inverter. Aspects of the present invention also relate to a wind turbine generator being capable of performing the method.
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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：US10544778B2
公开(公告)日：2020-01-28
申请号：US15573931
申请日：2016-06-16
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Yi Zhou , Gert Karmisholt Andersen , Manoj Gupta , Vajira Suminda Ganepola , Ciprian Biris , Miguel Angel Cova Acosta
Abstract: A method is provided of protecting a wind turbine with a doubly-fed induction generator (DFIG) against a sub-synchronous resonance (SSR) event acting on the wind turbine. A plurality of power-output values or current-output values is measured over a given period of time that corresponds to a measurement cycle. It is determined whether power-output values or current-output-values measured in the at-least-one measurement cycle are indicative of an SSR-event critical for further operation of the wind turbine. The wind turbine is shut down if the measured power-output values or current-output values are indeed indicative of an SSR-event critical for operation of the wind turbine.
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Patent Agency Ranking
公开(公告)号：US12015333B2
公开(公告)日：2024-06-18
申请号：US17634959
申请日：2020-08-12
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Cem Özgür Gerçek , Lars Helle , Ciprian Biris
IPC: H02M1/00 , H02J3/38 , H02M1/32 , H02M7/483 , H02M7/5395
CPC classification number: H02M1/0095 , H02J3/381 , H02M1/322 , H02M7/483 , H02M7/4835 , H02M7/5395 , H02J2300/28
Abstract: This disclosure proposes procedures and systems for discharging system capacitors and de-energizing power transmission systems having Modular Multilevel Converter (MMC) topologies by intelligent control of MMC cell components including configuration of bypass and insert switches using integrated DC choppers to effectively de-energize MMC cell capacitors and/or DC-link capacitors under operating conditions such as after a normal stop, for protection against over-voltages, dumping turbine energy, and under certain hardware fault conditions.
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公开(公告)号：US11355935B2
公开(公告)日：2022-06-07
申请号：US17155017
申请日：2021-01-21
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Bo Sun , Philip Came Kjær
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 a voltage in the electrical grid which requires an increase in output voltage from the power generating system; determining a partial-load condition of the converter, which corresponds to the converter being configured to output a voltage which is substantially below its maximum output voltage; and upon determining the partial-load condition, operating the tap changer to tap down the transformer, and operating the converter to provide the required increase in output voltage from the power generating system.
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公开(公告)号：US11025064B2
公开(公告)日：2021-06-01
申请号：US16468251
申请日：2017-11-24
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Manoj Gupta , Henrik Møller , Kouroush Nayebi , Janakiraman Sivasankaran , Mu Wei , Hans Kristian Bjørn
Abstract: A wind power plant system comprising: a plurality of wind turbine generators each having a corresponding generator controller, and a power plant controller for controlling the power generated by the wind power plant system; wherein at least some of the plurality of generator controllers are each configured to: generate a model that indicates the thermal capacity of one or more components of the wind turbine generator, determine power capacity data from the model, said data relating to: at least one reactive power supply level and a corresponding time limit for which that reactive power supply level may be maintained, and transmit to the power plant controller the determined power capacity data, wherein the power plant controller is operable to receive the power capacity data from the plurality of generator controllers and to transmit respective power references to the plurality of generator controllers to control the power generated by the wind power plant system.
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公开(公告)号：US10704534B2
公开(公告)日：2020-07-07
申请号：US16143818
申请日：2018-09-27
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Uffe C. Merrild , Leif Svinth Christensen , Martin Ansbjerg Kjær
Abstract: Controlling a wind turbine during a grid fault where the grid voltage drops below a nominal grid voltage. After detection of a grid fault, the total current limit for the power converter output is increased to a total maximum overload current limit. Depending on whether active or reactive current generation is prioritized, an active or reactive current reference is determined. The active current reference is determined in a way so that a reduction in active power production due to the grid voltage drop is minimized and based on the condition that the vector-sum of the active output current and the reactive output current is limited according to the total maximum overload current limit, and a maximum period of time is determined in which the power converter can be controlled based on the active/reactive current references. Afterwards the power converter is controlled based on the active and reactive current references.
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公开(公告)号：US10570885B2
公开(公告)日：2020-02-25
申请号：US16143818
申请日：2018-09-27
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Uffe C. Merrild , Leif Svinth Christensen , Martin Ansbjerg Kjær
Abstract: Controlling a wind turbine during a grid fault where the grid voltage drops below a nominal grid voltage. After detection of a grid fault, the total current limit for the power converter output is increased to a total maximum overload current limit. Depending on whether active or reactive current generation is prioritized, an active or reactive current reference is determined. The active current reference is determined in a way so that a reduction in active power production due to the grid voltage drop is minimized and based on the condition that the vector-sum of the active output current and the reactive output current is limited according to the total maximum overload current limit, and a maximum period of time is determined in which the power converter can be controlled based on the active/reactive current references. Afterwards the power converter is controlled based on the active and reactive current references.
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