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    Device for connecting a sub-network to an alternating voltage network and method for controlling an electrical power
    2.
    发明授权
    Device for connecting a sub-network to an alternating voltage network and method for controlling an electrical power 有权

    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.

    Method and inverter for determining capacitance values of capacitances of an energy supply system
    3.
    发明授权
    Method and inverter for determining capacitance values of capacitances of an energy supply system 有权

    公开(公告)号：US10148225B2

    公开(公告)日：2018-12-04

    申请号：US15154136

    申请日：2016-05-13

    Applicant: SMA Solar Technology AG

    Inventor： Alexander Unru ,  Harald Drangmeister ,  Tobias Mueller ,  Pablo Correa Vasquez

    IPC: H02S50/10 ,  H02S50/00 ,  G01R31/42 ,  G01R31/02 ,  H02J3/38 ,  H02M7/48

    Abstract: A method for determining capacitance values of capacitances of a photovoltaic system including a multiphase inverter which includes an output current filter on an alternating current side thereof and is connected to a multiphase energy supply network via a switching element and is associated with at least one intermediate circuit capacitance on the direct current side thereof is provided. The method includes disconnecting the photovoltaic system from the energy supply network by opening the switching element; operating the inverter to set up an island network after the disconnecting, wherein an in-phase AC voltage is applied to at least two outputs of an inverter bridge of the multiphase inverter and a flow of current is produced between the at least one intermediate circuit capacitance and at least one filter capacitance of the output current filter; measuring currents (Ia, Ib, Ic) flowing at the outputs of the inverter bridge and at least one voltage present at one of the capacitances, and determining a capacitance value of at least one of the capacitances using the determined voltage and the measured currents (Ia, Ib, Ic).

    METHOD FOR OPERATING A BATTERY CONVERTER, BATTERY CONVERTER AND SYSTEM
    4.
    发明申请
    METHOD FOR OPERATING A BATTERY CONVERTER, BATTERY CONVERTER AND SYSTEM 有权

    公开(公告)号：US20240405557A1

    公开(公告)日：2024-12-05

    申请号：US18798944

    申请日：2024-08-09

    Applicant: SMA Solar Technology AG

    Inventor： Alexander Unru

    IPC: H02J3/32 ,  H02J7/00

    Abstract: A method for operating a battery converter in a system 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 when 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 and a system having such a battery converter are also described.

    Method for operating a battery converter, battery converter and system
    5.
    发明授权
    Method for operating a battery converter, battery converter and system 有权

    公开(公告)号：US12062914B2

    公开(公告)日：2024-08-13

    申请号：US18102813

    申请日：2023-01-30

    Applicant: SMA Solar Technology AG

    Inventor： Alexander Unru

    IPC: H02J3/32 ,  H02J7/00

    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.

    METHOD FOR OPERATING AN ELECTROLYZER, CONNECTION CIRCUIT, RECTIFIER CIRCUIT, AND ELECTROLYSIS SYSTEM FOR CARRYING OUT THE METHOD
    7.
    发明申请
    METHOD FOR OPERATING AN ELECTROLYZER, CONNECTION CIRCUIT, RECTIFIER CIRCUIT, AND ELECTROLYSIS SYSTEM FOR CARRYING OUT THE METHOD 有权

    公开(公告)号：US20230045707A1

    公开(公告)日：2023-02-09

    申请号：US17970698

    申请日：2022-10-21

    Applicant: SMA Solar Technology AG

    Inventor： Alexander Unru ,  Arno Gerth ,  Ralf Juchem ,  Tobias Becker

    IPC: C25B1/04 ,  H02M3/158

    Abstract: The application describes a method for operating an electrolyzer to generate hydrogen from water using an electrolysis reaction, supplied with power from an AC grid via an actively controlled rectifier circuit. The method includes operating the electrolyzer in a normal operating mode with an input voltage UEI above a no-load voltage ULL with predominantly ohmic behavior, operating the electrolyzer in a standby operating mode with an input voltage UEI below the no-load voltage ULL with predominantly capacitive behavior, and transitioning from the standby operating mode to the normal operating mode during a first transition duration Δt1, wherein the first transition duration Δt1 is reduced by keeping the input voltage UEI at the electrolyzer input during the standby operating mode above a first voltage threshold value UTH,1 different from 0 V. The application furthermore describes a connection circuit, an actively controlled rectifier circuit and an electrolysis system for performing the method.

    TRACKING METHOD AND TRACKING DEVICE FOR A VOLTAGE CONVERTER FOR A PHOTOVOLTAIC SYSTEM
    8.
    发明申请
    TRACKING METHOD AND TRACKING DEVICE FOR A VOLTAGE CONVERTER FOR A PHOTOVOLTAIC SYSTEM 有权
    用于光伏系统的电压转换器的跟踪方法和跟踪装置

    公开(公告)号：US20140233263A1

    公开(公告)日：2014-08-21

    申请号：US14260741

    申请日：2014-04-24

    Applicant: SMA Solar Technology AG

    Inventor： Martin Bock ,  Tobias Mueller ,  Thomas Ortmann ,  Alexander Unru

    IPC: H02M7/42

    CPC classification number: H02M7/42 ,  G05F1/67 ,  Y02E10/58

    Abstract: The disclosure relates to a tracking method for a voltage transformer, in particular an inverter, of a photovoltaic system. In the method, an intermediate circuit voltage is repeatedly decreased or increased in one direction to a lower or higher voltage by voltage steps of a specified magnitude. The method is characterized in that an average rate of change of the intermediate circuit voltage in a partial time period between two voltage steps is limited by a maximum average rate of change, the maximum average rate of change being defined according to the magnitude of the intermediate circuit voltage. The disclosure further relates to a tracking device designed to perform the tracking method and to an inverter equipped with the tracking device.

    Abstract translation: 本公开涉及一种用于光伏系统的变压器，特别是逆变器的跟踪方法。 在该方法中，通过规定幅度的电压阶段，中间电路电压通过一个方向重复地减小或增加到较低或更高的电压。 该方法的特征在于，在两个电压阶段之间的部分时间段内的中间电路电压的平均变化率受到最大平均变化率的限制，最大平均变化率根据中间值的大小而定义 电路电压。 本公开还涉及被设计为执行跟踪方法的跟踪装置以及配备有跟踪装置的逆变器。

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