公开(公告)号：US20230262042A1

公开(公告)日：2023-08-17

申请号：US18306259

申请日：2023-04-25

Applicant: SMA Solar Technology AG

Inventor： Dirk Schlote ,  Jens Klein ,  Raimund Thiel ,  Mirko Wischer ,  Ingo Hanke

IPC: H04L9/40 ,  G06F21/31 ,  H02J3/38

CPC classification number: H04L63/08 ,  G06F21/31 ,  H02J3/381 ,  H02J2300/24

Abstract: A method for defining authentication data of a user at an energy conversion device connected to a grid and a source via a network connection includes receiving at the energy conversion device, via the network connection, a request from the user to newly assign authentication data, receiving at the energy conversion device desired authentication data of the user via the network connection, and storing the desired authentication data in the energy conversion device for an authentication of the user in the event of subsequent attempts to access the energy conversion device, when the energy conversion device is disconnected from the connected grid within a first predefined time window after receiving the request.

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.

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.

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.

公开(公告)号：US11658487B2

公开(公告)日：2023-05-23

申请号：US17360134

申请日：2021-06-28

Applicant: SMA Solar Technology AG

Inventor： Andreas Knobloch

IPC: H02J3/32 ,  H02J3/38 ,  H02J3/46 ,  H02S40/32

CPC classification number: H02J3/32 ,  H02J3/381 ,  H02J3/466 ,  H02S40/32 ,  H02J2300/24

Abstract: An energy generation system provides balancing power for an AC voltage grid, and comprises a photovoltaic generator and an energy store, wherein the energy generation system exchanges a total electrical power with the AC voltage grid (1), wherein the total power exchanged is set as a function of a current maximum PV power, a predefinable basic PV power between zero and the maximum PV power and a provided or requested balancing power. When no balancing power is requested: a total basic power, which comprises the basic PV power can be fed in; When a negative balancing power is requested: the PV power can be reduced compared to the basic PV power; When a positive balancing power is requested: a battery power can be drawn from the energy store if the requested positive balancing power is greater than the difference between the maximum PV power and the basic PV power.

公开(公告)号：US11567142B2

公开(公告)日：2023-01-31

申请号：US17375448

申请日：2021-07-14

Applicant: SMA Solar Technology AG

Inventor： Marcel Kratochvil ,  Raimund Thiel ,  Rainer Schmitt

IPC: G01R31/40 ,  H02H1/00

Abstract: A method of detecting a serial arc fault in a DC-power circuit includes injecting an RF-signal with a narrow band-width into the DC-power circuit and measuring a response signal related to the injected RF-signal in the DC-power circuit. The method further includes determining a time derivative of the response signal, analyzing the time derivative, and signaling an occurrence of a serial arc fault in the power circuit based on the results of the analysis. A system for detecting an arc fault is configured to perform a method as described before.

公开(公告)号：US11563383B2

公开(公告)日：2023-01-24

申请号：US17005783

申请日：2020-08-28

Applicant: SMA Solar Technology AG

Inventor： Claus Allert ,  Mathias Buenemann ,  Matthias Groene ,  Alexander Unru

IPC: H02J3/06 ,  H02M5/14 ,  H02J3/28 ,  H02J3/26 ,  H02J3/36

Abstract: A method for controlling an electrical power which flows into or out of an electrical subnetwork via a connection point is disclosed. The subnetwork has at least one electrical load, and the electrical load is connected to a control device via a communication connection, the electrical power flowing via the connection point is measured and a maximum power consumption of the electrical load is set by means of the control device on the basis of the electrical power flowing via the connection point. A device for connecting a multiphase subnetwork, which has an energy production installation and an energy store, to a superordinate multiphase alternating voltage network is configured to transmit electrical power between the alternating voltage network and the subnetwork and comprises an AC/AC converter having a network connection, two inverter bridge circuits with an interposed intermediate circuit and a subnetwork connection. The device also comprises a control device which is configured to set the electrical powers flowing via the individual phases of the subnetwork connection on the basis of power values of the energy production installation and/or of the energy store by suitably controlling the inverter bridge circuits of the AC/AC converter.

公开(公告)号：US11522494B2

公开(公告)日：2022-12-06

申请号：US16901179

申请日：2020-06-15

Applicant: SMA Solar Technology AG

Inventor： Stefan Buchhold ,  Jens Friebe ,  Michael Kotthaus ,  Ephraim Moeser ,  Torsten Soederberg ,  Thomas Wappler

IPC: H02S40/32 ,  H05K7/20 ,  H02M7/00

Abstract: An inverter for a photovoltaic system includes a substantially planar baseplate having a front and a rear, wherein the rear forms an outer rear wall of the inverter, and having at least one platform-like elevation that rises in the direction of the front of the baseplate. The inverter also includes a printed circuit board having one or more heat-generating components mounted thereon, wherein the printed circuit board is installed on the baseplate such that the one or more heat-generating components are arranged on the printed circuit board in the region of the platform-like elevation and are in thermal contact with the platform-like elevation. The inverter further includes a potting compound that fills a space on the front of the baseplate and surrounds at least partially the printed circuit board, and a cover arranged on or in the potting compound that adjoins the baseplate, so that the baseplate and the cover surrounding at least part of the potting compound form a housing. The inverter also includes at least four DC connectors that are arranged in pairs on at least one of the lateral end faces of the housing and at least part of which is cast in the potting compound, and an AC connector that is arranged on one of the lateral end faces of the housing, wherein electrical contacts of the AC connector are connected to the printed circuit board.

公开(公告)号：US20220385188A1

公开(公告)日：2022-12-01

申请号：US17886134

申请日：2022-08-11

Applicant: SMA Solar Technology AG

Inventor： Burkard Mueller

IPC: H02M3/158 ,  H02M7/483

Abstract: A circuit arrangement for balancing a split DC link arranged between a first DC-voltage terminal and a second DC-voltage terminal is disclosed. The first DC-voltage terminal is connected via a first semiconductor switch to a first intermediate point that is connected via a second semiconductor switch to a bridge center point that is connected via a third semiconductor switch to a second intermediate point that is connected via a fourth semiconductor switch to the second DC-voltage terminal. A first terminal of a resonant capacitor is connected to the first intermediate point, and a second terminal of the resonant capacitor is connected to a DC-link center point via a connecting path, in which a resonant inductor is arranged in a series circuit with the third semiconductor switch, and which runs via the second intermediate point. An additional winding is magnetically coupled to the resonant inductor and a first terminal thereof is connected via a first diode to a first terminal of a countervoltage source, and a second terminal thereof is connected to a second terminal of the countervoltage source so that an energy coupled into the additional winding from the resonant inductor is discharged into the countervoltage source.

公开(公告)号：US20220373613A1

公开(公告)日：2022-11-24

申请号：US17838630

申请日：2022-06-13

Applicant: SMA Solar Technology AG

Inventor： Michael Viotto ,  Martin Putz ,  Christian Tschendel

IPC: G01R31/52 ,  G01R31/64 ,  H02J3/00 ,  G01W1/10

Abstract: A fail-safe operating method for a decentralized power generation plant DG includes determining a leakage capacitance of a generator of the DG before connecting the DG. The method also includes comparing the determined leakage capacitance with a predetermined first limit value, and connecting the DG to a grid only if the determined leakage capacitance is smaller than the predetermined first limit value. A decentralized power generation plant is configured to perform the method.