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11.发明公开公开(公告)号：US20240035298A1
公开(公告)日：2024-02-01
申请号：US18485341
申请日：2023-10-12
Applicant: SMA Solar Technology AG
Inventor： Andreas Falk
CPC classification number: E04H5/04 , H05K9/0081
Abstract: The disclosure relates to a platform stack for the space-saving configuration of an energy conversion installation, comprising at least two platforms stacked one over another to form the platform stack, wherein each of the platform is configured to position a skid with a respective converter unit of the energy conversion installation such that they are stacked one on top of the other on via the two platforms. The platforms each include a frame structure having a storage surface for the skid, and have alignment elements on a first side and support posts on a second side of the frame structure, opposite the first side.
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公开(公告)号：US20230393179A1
公开(公告)日：2023-12-07
申请号：US18453599
申请日：2023-08-22
Applicant: SMA Solar Technology AG
Inventor： Martin Putz
CPC classification number: G01R27/025 , G01R27/10 , G01R31/40
Abstract: To measure an insulation resistance of a DC voltage source connected to a split intermediate circuit, a midpoint potential of the DC voltage source is shifted by different operation of two voltage converters by way of which two poles of the DC voltage source are each connected to one of two parts of the split intermediate circuit. A change in a residual current across all lines that carry a current flowing across the intermediate circuit from the DC voltage source, resulting from the shifting of the midpoint potential of the DC voltage source, is measured.
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公开(公告)号：US20230380088A1
公开(公告)日：2023-11-23
申请号：US18358325
申请日：2023-07-25
Applicant: SMA Solar Technology AG
Inventor： Steffen Müller
CPC classification number: H05K5/0221 , H02M7/003 , H05K5/0008 , H05K5/03 , H05K5/068
Abstract: An explosion-proof housing for a power electronics unit includes a housing pan and a cover that closes the housing pan via a seal, wherein the cover and the housing pan are pressed against each other at two opposing sides formed by edge regions of the cover and the housing pan via a plurality of fasteners that are configured to be released by rotation and that engage in latching structures. The plurality of fasteners are arranged in a central third of the respective sides. The explosion-proof housing can be used, for example, for a photovoltaic inverter.
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公开(公告)号：US20230283072A1
公开(公告)日：2023-09-07
申请号：US18316275
申请日：2023-05-12
Applicant: SMA Solar Technology AG
Inventor： Alexander Unru , Marcel Kratochvil , Burkard Müller
Abstract: The application describes a method for balancing voltages on a first and a second DC conductor in a DC grid using a balancing circuit with a first and second semiconductor switch connected in series between the first and second DC conductors, and a connection to a ground potential that is arranged between the first and second semiconductor switches. In the presence of an asymmetry in the voltages of the first and second DC conductors to ground potential, a compensation current is generated between at least one of the DC conductors ground potential via at least one of the semiconductor switches, with the asymmetry in the voltages being reduced by the compensation current (IA), with the voltages of the DC conductors to ground potential being balanced.
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公开(公告)号：US11722003B2
公开(公告)日：2023-08-08
申请号：US17137646
申请日：2020-12-30
Applicant: SMA Solar Technology AG
Inventor： Claus Allert , Aleksandra-Sasa Bukvic-Schaefer , Harald Christian Benz , Patrick Blair Reynolds
Abstract: A power converter with an inverter that is configured to transform electrical power between a DC-side of the power converter and an AC-side of the power converter, includes a first port operatively connected to an AC-grid, a second port operatively connected to an AC-load, a third port connected to an external power source, and a fourth port operatively connected to a rechargeable DC-power storage. The power converter includes a DC/DC-converter between the third port and the inverter, to transfer electrical power provided by the external power source from the third port to the inverter. The inverter is configured to be grid forming and provide electrical power to the second port upon a power supply outage at the first port, the power converter includes a control unit to monitor the third port and detect parameters of the electrical power provided via the third port.
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Patent Agency Ranking
公开(公告)号：US20230187942A1
公开(公告)日：2023-06-15
申请号：US18097535
申请日：2023-01-17
Applicant: SMA Solar Technology AG
Inventor： Andreas Knobloch , Christian Hardt , Mats Bernsdorff , Daniel Premm
IPC: H02J3/38 , H02J7/00 , H02J3/16 , G05B19/042
CPC classification number: H02J3/38 , G05B19/042 , H02J3/16 , H02J7/0048 , G05B2219/2639
Abstract: In a method for operating a power supply plant having a plurality of inverters and a plant controller connected to the inverters for communication, the power supply plant has a grid connection, which is connected to an AC voltage grid. Via the grid connection, the inverters exchange electrical interchange powers with the AC voltage grid such that the power supply plant exchanges a total interchange power, composed of the respective electrical interchange powers, with the AC voltage grid. By means of a respective regulator, the inverters adjust their respective interchange powers depending on a respective deviation of a voltage profile of a grid voltage from a respective reference profile with respect to a respective reference frequency and/or depending on a respective voltage amplitude differential between a respective grid voltage and a respective reference voltage. The plant controller influences the regulators of the inverters depending on a power differential between the total interchange power and a specified interchange power. A power supply plant according to the application is designed to carry out this method.
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公开(公告)号：US20230170701A1
公开(公告)日：2023-06-01
申请号：US18102813
申请日：2023-01-30
Applicant: SMA Solar Technology AG
Inventor： Alexander Unru
CPC classification number: H02J3/32 , H02J7/00712 , H02J2207/20
Abstract: A described method for operating a battery converter in a system, in which, in addition to the battery converter, an inverter, which is connected to a grid, and a DC load are connected to a common intermediate circuit via a DC bus, includes: —controlling an exchange power of the battery converter using a battery, which is connected to the battery converter, depending on a voltage of the intermediate circuit in accordance with a converter characteristic curve, —identifying a decrease in the intermediate circuit voltage below a rectifying value of the permissible AC voltage of the grid connected to the inverter, and —if the decrease is identified, temporarily shifting the converter characteristic curve so that a maximum discharging power of the battery converter is reached at a value of the intermediate circuit voltage that is above or at the rectifying value. A battery converter, which is configured to carry out the method, and a system having such a battery converter are also described.
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公开(公告)号：US20230155413A1
公开(公告)日：2023-05-18
申请号：US18099506
申请日：2023-01-20
Applicant: SMA Solar Technology AG
Inventor： Claus Allert
Abstract: An inverter includes a battery terminal configured to connect to an electrical storage unit, a load terminal configured to connect to at least one electrical-energy consumer, and a grid terminal configured to connect to a superordinate distribution grid. The inverter also includes a bidirectional inverter bridge connected to the battery terminal, a first switching circuit, and a second switching circuit. The first switching circuit is arranged between the bidirectional inverter bridge and the second switching circuit, and the second switching circuit is arranged between the first switching circuit and the grid terminal. The first switching circuit is configured to enter a first state without a holding current and to switch into a second state with a holding current, and the second switching circuit is configured to be switched over between the first and second states by a signal.
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公开(公告)号：US20230084081A1
公开(公告)日：2023-03-16
申请号：US17993007
申请日：2022-11-23
Applicant: SMA Solar Technology AG
Inventor： Andreas Knobloch
Abstract: A method for stabilizing a DC voltage in a DC grid that includes a DC bus connected to a higher-order grid and to which an energy generating system and at least one load are connected. A variable electric grid output is exchanged between the DC bus and the higher-order grid in order to keep the DC voltage in the DC bus at a nominal voltage. The energy generating system includes a PV generator connected to the DC bus via a DC-to-DC converter and which exchanges an electric generator output with the DC bus. In a normal operating mode, the generator output is set to a normal operating output by the DC-to-DC converter on the basis of an MPP output of the PV generator. In a grid support mode, the generator output is set to a grid support output on the basis of the DC voltage in the DC bus in order to counteract a power imbalance between the electric power supplied in total to the DC bus and the power drawn in total from the DC bus.
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公开(公告)号：US20230050530A1
公开(公告)日：2023-02-16
申请号：US17975945
申请日：2022-10-28
Applicant: SMA Solar Technology AG
Inventor： Alexander Unru , Andreas Falk , Dirk Hermeling , Ralf Juchem , Marcel Kratochvil
Abstract: A method and related apparatus for extending a DC voltage range of a rectifier circuit for the supply, from an AC grid, of a DC load which is connected to a DC rectifier output of the rectifier circuit, wherein an AC rectifier input of the rectifier circuit is connected via a grid connection point to the AC grid, wherein the rectifier circuit includes an AC/DC converter having an AC input and a DC output, wherein the AC/DC converter includes a converter circuit having semiconductor switches and freewheeling diodes connected in an antiparallel arrangement thereto, wherein an inductance is connected between the AC input of the AC/DC converter and the grid connection point. The method includes setting a desired DC operating voltage UDOC,soll on the DC output of the AC/DC converter or on the DC rectifier output, or both, by an actuation of semiconductor switches of the AC/DC converter, wherein, when the desired DC operating voltage UDC,soll lies below a value of an amplitude Û4 of an alternating voltage on the AC input of the AC/DC converter, the semiconductor switches of the AC/DC converter are actuated for an exchange of reactive power Q1(t) with the AC grid, which has a voltage-lowering effect upon the amplitude Û4 of the AC voltage at the AC input of the AC/DC converter, such that the amplitude Û4 approaches the desired DC operating voltage UDC,soll, and wherein the exchange of the reactive power Q1(t) with the AC grid is executed during or shortly before an electrical connection or an electrical isolation of the DC load to or from the rectifier circuit.
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