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    MODULAR POWER CONVERTER SYSTEM FOR HYBRID POWER PLANT
    2.
    发明申请
    MODULAR POWER CONVERTER SYSTEM FOR HYBRID POWER PLANT 审中-公开

    公开(公告)号：WO2022022793A1

    公开(公告)日：2022-02-03

    申请号：PCT/DK2021/050252

    申请日：2021-07-30

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： CATROGA, Renato ,  ANDREASEN, Marcin Blazniak ,  DINCAN, Catalin Gabriel ,  HELLE, Lars

    IPC: H05K7/20

    Abstract: An electric modular system for connection to a hybrid power plant. An enclosure (CNT), e.g. a standard size container houses: 1) a first electric converter system (CV1) connected to an electric output of a wind turbine and generates a first DC output, 2) a second electric converter system (CV2) arranged connected to an output of a photovoltaic source (PV) or a battery (BT) and generates a second DC output, 3) an output electric converter system (CV0) receiving the first and second DC outputs and generates an electric output e.g. for connection to an electric grid. A cooling system (CLS) with a flow duct to receives air from outside and provides a controllable amount of cooling to the electric converter systems accordingly, e.g. via controllable flow resistive elements. A cooling controller (CC) senses output loads (L1, L2, L0) of the electric converter systems (CV1, CV2, CV0) and controls the cooling system (CLS) to direct an amount of cooling to the electric converter systems (CV1, CV2, CV0) as a function of their electric output loads (L1, L2, L0). Especially, back-to-back mounted sets of cabinets with modules of the electric converter system, and each with a dedicated cooling unit allows effective use of cooling capacity according to the actual electric load situation.

    WIND TURBINE WITH INTEGRATED HYDROGEN GENERATION
    3.
    发明申请
    WIND TURBINE WITH INTEGRATED HYDROGEN GENERATION 审中-公开

    公开(公告)号：WO2021219182A1

    公开(公告)日：2021-11-04

    申请号：PCT/DK2021/050127

    申请日：2021-04-23

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： DINCAN, Catalin Gabriel ,  WU, Rui ,  KJÆR, Philip Carne

    IPC: F03D9/19 ,  F05B2220/61 ,  F05B2260/42

    Abstract: An off-grid wind turbine system comprising a wind turbine with an electric generator (G) for generating an initial electric power output (AC). An electrolyzer system with a hydrogen electrolyzer (ELT) located inside the nacelle or tower of the wind turbine, so as to generate hydrogen (H) by an electrolysis process. An electric converter system (CNV) serves to convert the initial electric power output (AC) into a DC electric power output (DC) dedicated for powering the electrolyzer (ELT). The produced hydrogen (H) is stored in a hydrogen storage tank (HTK), e.g. located adjacent to the wind turbine. Modules each comprising a converter and an electrolyzer may be stacked to provide the necessary capacity. In some embodiment, a synchronous generator excited by an external exciter (EXC) is used, and in some embodiments a hydraulic torque converter (HTC) is used. In some embodiments an AC to DC converter system involving transformer is used, while in other embodiments an intermediate DC to DC converter is used. By placing the electrolyzer (ELT) inside the wind turbine, a dedicated and compact wind turbine is provided which allows a rather simple and low cost wind turbine especially suited for storing energy in the form of hydrogen based on wind.

    WIND TURBINE FOR DEDICATED HYDROGEN GENERATION
    4.
    发明申请
    WIND TURBINE FOR DEDICATED HYDROGEN GENERATION 审中-公开

    公开(公告)号：WO2021219176A1

    公开(公告)日：2021-11-04

    申请号：PCT/DK2021/050120

    申请日：2021-04-22

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： DINCAN, Catalin Gabriel ,  WU, Rui ,  KJÆR, Philip Carne

    IPC: F03D9/19 ,  F05B2220/61 ,  F05B2260/42

    Abstract: An off-grid wind turbine system comprising a wind turbine with an electric generator (G) for generating an initial electric power output (AC). An electrolyzer system with a hydrogen electrolyzer (ELT) located adjacent to the wind turbine, e.g. in a housing separate from the wind turbine, so as to generate hydrogen (H) by an electrolysis process. An electric converter system (CNV) serves to convert the initial electric power output (AC) into a DC electric power output (DC) dedicated for powering the electrolyzer (ELT). The produced hydrogen (H) is stored in a hydrogen storage tank (HTK), e.g. located adjacent to the wind turbine. Modules each comprising a converter and an electrolyzer may be stacked to provide the necessary capacity. In some embodiment, a synchronous generator excited by an external exciter (EXC) is used, and in some embodiments a hydraulic torque converter (HTC) is used. In some embodiments an AC to DC converter system involving transformer is used, while in other embodiments an intermediate DC to DC converter is used. A part of the electric converter system (CNV) may be located in the same housing as the electrolyzer (ELT), e.g. integrated to form a unit. By placing the electrolyzer (ELT) adjacent to the wind turbine, a dedicated and compact wind turbine system can be provided which allows a rather simple and low cost wind turbine especially suited for storing energy in the form of hydrogen based on wind.

    OFF GRID WIND TURBINE ELECTRIC VEHICLE CHARGING SYSTEM AND METHOD
    5.
    发明申请
    OFF GRID WIND TURBINE ELECTRIC VEHICLE CHARGING SYSTEM AND METHOD 审中-公开

    公开(公告)号：WO2021115541A1

    公开(公告)日：2021-06-17

    申请号：PCT/DK2020/050340

    申请日：2020-12-01

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： DINCAN, Catalin Gabriel ,  GERÇEK, Cem Özgür ,  HELLE, Lars ,  KJÆR, Philip Carne

    IPC: B60L53/52 ,  B60L53/53 ,  B60L53/57 ,  F03D9/11 ,  H02J7/34 ,  B60L53/10

    Abstract: An off grid electric system for charging electric vehicles. A plurality of wind turbines (WT1, WT2, WT3, WT4) serve to generate respective electric power outputs, and an electric storage system (BTS), e.g. Li-ion batteries, is arranged to store electric power generated by the wind turbines. A plurality of electric vehicle charging stations (VC1, VC2, VC3, VC4) 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). In preferred embodiments, the wind turbines have permanent magnet generators that generate Medium Voltage AC outputs, e.g. 4-8 kV, and generate Medium Voltage DC outputs by means of a DC-DC converter placed down-tower. In some embodiments the DC-DC converter is placed in a kiosk near the wind turbine, whereas the EV charging stations are placed 25-500 m further away from the wind turbine. Such off grid wind turbine systems are feasible for e.g. charging of large fleets of EVs, especially in embodiments where a weather forecast is used to control electric power distribution between electric storage and wind turbines in response to a prediction of available wind turbine electric power.

    DC-DC CONVERTER AND DC-DC CONVERSION METHOD
    6.
    发明申请
    DC-DC CONVERTER AND DC-DC CONVERSION METHOD 审中-公开

    公开(公告)号：WO2018141342A1

    公开(公告)日：2018-08-09

    申请号：PCT/DK2018/050016

    申请日：2018-01-29

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： DINCAN, Catalin Gabriel ,  KJÆR, Philip Carne

    IPC: H02M3/337

    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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