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1.发明申请公开(公告)号：US20230133674A1
公开(公告)日：2023-05-04
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：US20190386571A1
公开(公告)日：2019-12-19
申请号：US16478916
申请日：2018-01-29
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Catalin Gabriel DINCAN , Phillip Came KJÆR
Abstract: A DC to DC power converter is described which comprises a transformer, a primary side connected to a primary winding of the transformer, a secondary side connected to a secondary winding of the transformer, and a controller. An input of the secondary side comprises inductor-capacitor (LC) circuitry, and the primary side comprises switching circuitry. The controller is arranged to control switching of the switching circuitry to apply voltage pulses to the primary winding of the transformer, the voltage pulses being separated by zero voltage periods during which a zero or near zero voltage is applied to the transformer, and a frequency of the switching of the switching circuitry is lower than the resonant frequency of the LC circuitry. With this arrangement, operating a sub-resonant mode permits a full resonant cycle of the LC circuitry to pass within a single switching cycle of the first and second switching circuitry, allowing zero current switching, while the output power effectively becomes a function of switching frequency (which varies the number of resonant pulses at the LC circuitry, each pulse transferring a predetermined amount of power). The removal of the voltage pulse, which would be otherwise generated by the switching circuitry, when it is not required, thereby avoids or at least reduces a flux build up at the transformer (to which the voltage pulse is applied). The result can be a highly efficient and controllable series resonant converter.
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公开(公告)号：US20230167804A1
公开(公告)日：2023-06-01
申请号：US17922543
申请日：2021-04-23
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Catalin Gabriel DINCAN , Rui WU , Philip Carne KJÆR
IPC: F03D9/19
CPC classification number: F03D9/19 , F05B2220/61 , F05B2260/42
Abstract: An off-grid wind turbine system comprising a wind turbine with an electric generator for generating an initial electric power output. An electrolyzer system with a hydrogen electrolyzer located inside the nacelle or tower of the wind turbine, so as to generate hydrogen by an electrolysis process. An electric converter system serves to convert the initial electric power output into a DC electric power output dedicated for powering the electrolyzer. The produced hydrogen is stored in a hydrogen storage tank.
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公开(公告)号：US20230034965A1
公开(公告)日：2023-02-02
申请号：US17785020
申请日：2020-12-01
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Catalin Gabriel DINCAN , Cem Özgür GERÇEK , Lars HELLE , Philip Carne KJÆR
Abstract: An off grid electric system for charging electric vehicles. An electric storage system (BTS) is arranged to store electric power generated by a plurality of wind turbines. A plurality of electric vehicle charging stations are connected to the plurality of wind turbines, and the electric storage system by means of an off grid electric power network (CN), so as to allow each charging station to charge at least one electric vehicle (EV).
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