公开(公告)号：US12283808B2

公开(公告)日：2025-04-22

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

Abstract: The disclosure relates to a device and associated method for electrolysis from photovoltaically generated DC power, including an electrolyzer and a DC/DC converter. The DC/DC converter feeds DC power to the electrolyzer, 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 in such a way that the second disconnector is opened in the event that a predefinable limit value of the fault current is exceeded.

公开(公告)号：US20250096292A1

公开(公告)日：2025-03-20

申请号：US18964845

申请日：2024-12-02

Applicant: SMA Solar Technology AG

Inventor： Alexander Unru ,  Jose Navaro ,  Michael Krug ,  Andreas Kluger

IPC: H01M8/04858 ,  C25B9/65 ,  C25B15/02 ,  H01M8/04537 ,  H01M8/04955 ,  H02J3/38

Abstract: The disclosure relates to a method for establishing a defined state in an electrochemical system connected to an AC/DC converter via a switch disconnector to exchange electric power. At least one DC connection of the electrochemical system is connected to the AC/DC converter via the disconnecting switch. The method includes, in a first operating state, closing a first switch to establish an electric connection between the DC connections of the electrochemical system. The application additionally relates to a disconnecting device, a power converter, and to an assembly.

公开(公告)号：US20250030355A1

公开(公告)日：2025-01-23

申请号：US18908008

申请日：2024-10-07

Applicant: SMA Solar Technology AG

Inventor： Ralf Juchem ,  Andreas Falk ,  Bernhard Voll

IPC: H02M7/23 ,  C25B9/65 ,  H02M7/00

Abstract: The disclosure describes an energy supply device for an electrolysis unit and an electrolysis installation comprising the energy supply device and an electrolysis unit connected thereto.

公开(公告)号：US20240332981A1

公开(公告)日：2024-10-03

申请号：US18743411

申请日：2024-06-14

Applicant: SMA Solar Technology AG

Inventor： Marcel Kratochvil ,  Alexander Unru

IPC: H02J3/38 ,  H02J15/00

CPC classification number: H02J3/381 ,  H02J15/008 ,  H02J2300/24

Abstract: A device for converting electrical power between a PV generator and an electrolyzer. The device has an inverter arranged between a first side thereof and a transformer, and an active rectifier is arranged between the transformer and a second side of the device, such that an AC side of the active rectifier and an AC side of the inverter are connected to one another via the transformer. The inverter is configured to convert a first DC voltage on the DC side of the inverter into a first AC voltage on the AC side of the inverter and the active rectifier is configured designed to convert a second AC voltage on the AC side of the active rectifier into a second DC voltage on the DC side of the active rectifier. The device has a controller configured to influence a power flow between the first side and the second side of the device from a connected PV generator to a connected electrolyzer by adjusting an AC/DC transformation ratio of the active rectifier between the second AC voltage and the second DC voltage.

公开(公告)号：US20240322572A1

公开(公告)日：2024-09-26

申请号：US18735348

申请日：2024-06-06

Applicant: SMA Solar Technology AG

Inventor： Björn Oliver Winter

IPC: H02J3/38 ,  G01R19/25 ,  H02J3/00

CPC classification number: H02J3/388 ,  G01R19/2513 ,  H02J3/001

Abstract: The disclosure is directed to an island network detection method using a voltage-impressing converter, and includes determining the frequency and phase of a voltage curve of a sub-network connected to a network connection point of the converter, and generating a voltage curve using a bridge circuit of the converter with the determined frequency. The method also includes determining a correlation between a first temporal variation and a second temporal variation of an output exchanged by the converter with the sub-network, and detecting an island network if the determined correlation undershoots a specified correlation measurement.

公开(公告)号：US12088249B2

公开(公告)日：2024-09-10

申请号：US17746040

申请日：2022-05-17

Applicant: SMA Solar Technology AG

Inventor： Edwin Kiel

IPC: H02S50/10 ,  H02S40/32

CPC classification number: H02S50/10 ,  H02S40/32

Abstract: A method and associated system for determining an operating parameter of a PV installation having a plurality of PV modules is disclosed. The PV modules each include a shutdown apparatus connected to a transmission apparatus of the PV installation and has a feed-in operation and a shutdown operation. At least one PV module is equipped with a power-optimizing device which is configured to set an operating point of the PV module in an optimizing operation. The method includes determining a first total electrical power of the PV modules in a non-optimizing operation of the at least one power-optimizing device and in the feed-in operation of the shutdown apparatuses, and determining a second total electrical power of the PV modules in the optimizing operation of all the power-optimizing devices and in the feed-in operation of the shutdown apparatuses. The method also includes determining the operating parameter using a difference between the determined first total electrical power and the determined second total electrical power.

公开(公告)号：US20240247390A1

公开(公告)日：2024-07-25

申请号：US18627548

申请日：2024-04-05

Applicant: SMA Solar Technology AG

Inventor： Alexander Unru ,  Andreas Falk ,  Ralf Juchem

IPC: C25B15/02 ,  H01M8/04082 ,  H01M8/04303 ,  H01M8/04858 ,  H01M8/0656 ,  H02M3/04 ,  H02M7/44

CPC classification number: C25B15/02 ,  H01M8/04201 ,  H01M8/04303 ,  H01M8/04917 ,  H01M8/0656 ,  H02M3/04 ,  H02M7/44

Abstract: The application describes a method for operating an electrolyzer and a fuel cell which, in parallel with one another, are connected to a device-side converter connection of a common bidirectional converter, on

公开(公告)号：US12044735B2

公开(公告)日：2024-07-23

申请号：US17231390

申请日：2021-04-15

Applicant: SMA Solar Technology AG

Inventor： Steffen Aust ,  Martin Putz

IPC: G01R31/327 ,  G01R27/20 ,  G01R31/52

CPC classification number: G01R31/3277 ,  G01R27/205 ,  G01R31/52

Abstract: A method for measuring insulation resistance in an inverter that has a DC link circuit and a bridge circuit, connected to the DC link circuit, for driving an AC current via a bridge center tap is disclosed. The method includes connecting the bridge center tap to a grounding point, successively connecting, by way of the bridge circuit, the bridge center tap that is connected to the grounding point to two points of the ungrounded DC link circuit that differ in terms of voltage, and measuring the current flowing from the two points that differ in terms of voltage to the grounding point. The two points of the ungrounded DC link circuit that differ in terms of voltage are selected from a group of points that includes at least one intermediate voltage point of the DC link circuit in addition to two end points of the DC link circuit, such that the voltages present between the two points that differ in terms of voltage and the grounding point do not exceed a predefined voltage limit value.

公开(公告)号：US20240128857A1

公开(公告)日：2024-04-18

申请号：US18396810

申请日：2023-12-27

Applicant: SMA Solar Technology AG ,  Sunfire GmbH

Inventor： Alexander Unru ,  Eike Rafael Koch

IPC: H02M1/36 ,  C25B1/04 ,  C25B9/65 ,  C25B15/02 ,  C25B15/06 ,  H02M1/32 ,  H02M7/219

CPC classification number: H02M1/36 ,  C25B1/04 ,  C25B9/65 ,  C25B15/02 ,  C25B15/06 ,  H02M1/32 ,  H02M7/219

Abstract: A method for starting an electrolysis system is disclosed. A supply circuit has an AC terminal connected to an AC grid, a DC terminal connected to an electrolyzer, and an AC/DC converter arranged between the AC terminal and the DC terminal. The method includes charging an output capacitor connected to a DC converter terminal of the AC/DC converter, by operating the electrolyzer in a reverse mode, while the AC/DC converter is connected to the electrolyzer and disconnected from the AC grid, connecting the AC/DC converter to the AC grid, reversing the operation of the electrolyzer from the reverse mode to a normal mode as a DC load, to suppress a power flow between the AC grid and the electrolyzer, and operating the electrolyzer in the normal mode with electrical power drawn from the AC grid which is rectified by the AC/DC converter.

公开(公告)号：US20240039915A1

公开(公告)日：2024-02-01

申请号：US18483544

申请日：2023-10-10

Applicant: SMA Solar Technology AG

Inventor： Marek Seeger ,  Stefan Börger ,  Dirk Schlote ,  Jens Klein ,  Raimund Thiel ,  Mirko Wischer ,  Ingo Hanke

IPC: H04L9/40 ,  H04L9/08 ,  H04L9/32

CPC classification number: H04L63/0884 ,  H04L63/061 ,  H04L63/166 ,  H04L9/0838 ,  H04L9/3226 ,  H04L2463/082

Abstract: A method for logging a user into a device for a power generation plant, using a service gateway, wherein an access authorization of the user for the device is stored on the service gateway, is disclosed. The method includes authenticating the user on the service gateway, sending a device access request using an access device from the user to the service gateway specifying an identifier of the device for the power generation plant, and comparing a device secret stored on the service gateway with a copy of the device secret generated using the device secret and stored on the device, via an SRP protocol.