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    Method and circuit arrangement for detecting an arc and photovoltaic (PV) inverter having a corresponding circuit arrangement
    1.
    发明授权
    Method and circuit arrangement for detecting an arc and photovoltaic (PV) inverter having a corresponding circuit arrangement 有权

    公开(公告)号：US12132443B2

    公开(公告)日：2024-10-29

    申请号：US17865606

    申请日：2022-07-15

    Applicant: SMA Solar Technology AG

    Inventor： Marcel Kratochvil ,  Rainer Schmitt ,  Torsten Otto ,  Sybille Pape

    IPC: G01R31/66 ,  H02J3/14 ,  H02J3/38 ,  H02S40/32 ,  H02S40/36 ,  H02S50/00

    CPC classification number: H02S50/00 ,  G01R31/66 ,  H02J3/14 ,  H02J3/381 ,  H02S40/32 ,  H02S40/36 ,  H02J2300/24

    Abstract: The disclosure describes a method for detecting an arc in a direct-current (DC) circuit comprising a DC load, a DC source supplying the DC load, and a circuit arrangement arranged between the DC source and the DC load. A power flow P between an input and an output of the circuit arrangement is suppressed by means of a switching circuit through cyclical interruption such that the power flow P is enabled in an active time window with the first period Δt1 and the power flow P is suppressed in an inactive time window with the second period Δt2. Via detection of an input current Iin flowing at the input and/or an input voltage Uin applied to the input and comparison of values of the input current Iin and/or input voltage Uin detected in the inactive time window with a current threshold value ITH or a voltage threshold value UTH an arc presence criterion is signaled if the input current Iin detected in the inactive time window falls below the current threshold value ITH and/or the input voltage Uin detected in the inactive time window does not exceed the voltage threshold value UTH. The application also describes a circuit arrangement for detecting an arc and a photovoltaic (PV) inverter including such a circuit arrangement.

    METHOD AND CIRCUIT ARRANGEMENT FOR ACQUIRING A CHARACTERISTIC CURVE OF A PV GENERATOR
    4.
    发明公开
    METHOD AND CIRCUIT ARRANGEMENT FOR ACQUIRING A CHARACTERISTIC CURVE OF A PV GENERATOR 审中-公开

    公开(公告)号：US20240146241A1

    公开(公告)日：2024-05-02

    申请号：US18407589

    申请日：2024-01-09

    Applicant: SMA Solar Technology AG

    Inventor： Martin Jilg

    IPC: H02S50/10 ,  H02J3/38 ,  H02J3/46 ,  H02M1/32 ,  H02S40/32

    CPC classification number: H02S50/10 ,  H02J3/381 ,  H02J3/46 ,  H02M1/32 ,  H02S40/32 ,  H02J2300/24

    Abstract: A method for acquiring a characteristic curve of a PV generator is disclosed. In a power generation installation, an output side of each PV generator is connected via an assigned DC-DC converter, in parallel to a DC link as the input element of a DC-AC converter. The method includes reducing a cumulative output power of those DC-DC converters for which the associated PV generators are not intended for acquiring the characteristic curve during the acquisition of the characteristic curve of the PV generator to be scanned to ensure that the sum of the reduced cumulative output power and of the expected maximum power of the PV generator to be scanned does not exceed a nominal power of the DC-AC converter, and subsequently acquiring the characteristic curve of the PV generator to be scanned.

    PHOTOVOLTAICALLY SUPPLIED ELECTROLYSIS
    8.
    发明公开
    PHOTOVOLTAICALLY SUPPLIED ELECTROLYSIS 审中-公开

    公开(公告)号：US20230198247A1

    公开(公告)日：2023-06-22

    申请号：US18108751

    申请日：2023-02-13

    Applicant: SMA Solar Technology AG

    Inventor： Martin Putz ,  Andreas Falk

    IPC: H02H7/20 ,  H02H1/00 ,  H02S40/36 ,  H02S50/10

    CPC classification number: H02H7/20 ,  H02H1/0007 ,  H02S40/36 ,  H02S50/10

    Abstract: The disclosure relates to a device for electrolysis from photovoltaically generated DC power, including an electrolyzer and a DC/DC converter. The DC/DC converter is configured to feed DC power to the electrolyzer via a DC bus, wherein: the DC power is generated by a photovoltaic (PV) sub-generator connected to the DC/DC converter. The PV sub-generator is connected to the DC/DC converter via a first disconnector that is coupled to an isolation monitoring structure in such a way that closure of the first disconnector requires a successful check for sufficient isolation of the PV sub-generator. The PV sub-generator has a main string and a second disconnector arranged between the main string and the first disconnector. The second disconnector is coupled to a fault current monitoring circuit of the main string in such a way that the second disconnector is opened in the event that a predefinable limit value of the fault current is exceeded. The disclosure also relates to a method.

    Regulating method for a decentralized energy generating system, and decentralized energy generating system
    9.
    发明授权
    Regulating method for a decentralized energy generating system, and decentralized energy generating system 有权

    公开(公告)号：US11677247B2

    公开(公告)日：2023-06-13

    申请号：US17567373

    申请日：2022-01-03

    Applicant: SMA Solar Technology AG

    Inventor： Daniel Premm ,  Cornelius Fuetterer ,  Oliver Glitza

    IPC: H02J3/38 ,  H02J3/16 ,  H02J3/46

    CPC classification number: H02J3/381 ,  H02J3/16 ,  H02J3/46 ,  H02J2300/20 ,  H02J2300/24

    Abstract: A method for regulating a decentralized energy generating system with a plurality of inverters (IN) is disclosed. The method includes receiving at the PPC a detected active power, reactive power and voltage amplitude at a grid connection point (PCC) of the energy generating system; and regulating, in a normal operating mode of the energy generating system, the reactive power and the active power to target values stipulated by a grid operator by virtue of the central control unit (PPC) dividing the stipulated target values into individual target stipulations for the plurality of inverters (IN) and communicating individual target stipulations to the inverters (IN). The method further includes selectively changing to a special operating mode of the energy generating system if particular criteria are present at the grid connection point (PCC) in a stipulated time interval. In the special operating mode, the central control unit (PPC) effects a reduction of the active power provided at the grid connection point (PCC) compared to the stipulated target values.

    EXPLOSION-PROOF HOUSING FOR A POWER ELECTRONICS DEVICE
    10.
    发明公开
    EXPLOSION-PROOF HOUSING FOR A POWER ELECTRONICS DEVICE 审中-公开

    公开(公告)号：US20230171912A1

    公开(公告)日：2023-06-01

    申请号：US18160422

    申请日：2023-01-27

    Applicant: SMA Solar Technology AG

    Inventor： Steffen Müller ,  Waissi Tello

    IPC: H05K7/14

    CPC classification number: H05K7/1432

    Abstract: The disclosure relates to a housing for a power electronics device, including a tray for receiving power electronics components and a cover for placing on the tray so that a closed housing is formed. The cover is fixed on the tray by a plurality of fixing screws. At least one opening element is provided that is made of one of the fixing screws, each of which is guided through a sleeve with deformation structures. The sleeve is arranged between the screw head of the fixing screw and the housing such that a pressing force is exerted by the screw head between the cover and the tray via the sleeve. The deformation structures are designed such that under the effect of the force of an explosion that exceeds the pressing force, the sleeve is compressed in a manner defined by the deformation structures such that a gap with a specified width is formed between the cover and the tray.

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