公开(公告)号：US10056758B2

公开(公告)日：2018-08-21

申请号：US14812090

申请日：2015-07-29

Applicant: SMA Solar Technology AG

Inventor： Alexander Unru ,  Thomas Schroeder

IPC: H02J1/00 ,  H02J3/00 ,  H02J3/38 ,  H02M7/42 ,  H02M3/04 ,  H02J1/10

CPC classification number: H02J3/383 ,  H02J1/102 ,  H02J3/385 ,  H02M3/04 ,  H02M7/42 ,  Y02E10/58 ,  Y10T307/707

Abstract: In order to distribute power over multiple direct current sources which are connected in parallel to an input-side direct voltage intermediate circuit of a DC/AC transformer, at least one of which direct current sources is connected to the direct voltage intermediate circuit via a DC/DC transformer, wherein the DC/DC transformer can be actuated to change the power fed into the direct voltage intermediate circuit by the direct current source, the power levels of the direct current sources are decreased differently in a decreased operating mode of the DC/AC transformer in which the power of the DC/AC transformer is decreased compared to the sum of the maximum power levels available from all the direct current sources, and by actuating at least the one DC/DC transformer via which the at least one direct current source is connected to the direct voltage intermediate circuit, variation in the power levels of at least one other direct current source is compensated dynamically.

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：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：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：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：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

IPC: H02J1/14 ,  H02M3/155

CPC classification number: H02J1/14 ,  H02M3/155

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.

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

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.

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

IPC: H02M7/219 ,  H02M1/00 ,  C25B9/65

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.

公开(公告)号：US20210313809A1

公开(公告)日：2021-10-07

申请号：US17349074

申请日：2021-06-16

Applicant: SMA Solar Technology AG

Inventor： Marlies Richter ,  Ferdinand Wikullil ,  Maurice Gonska ,  Matthias Groene ,  Mathias Buenemann ,  Alexander Unru ,  Mats Bernsdorff

IPC: H02J3/46 ,  H02J3/14 ,  H02J3/38

Abstract: A method is disclosed for controlling an electrical installation having electrical devices operated in an energy-producing, energy-storing and/or energy-consuming manner and are connected to an energy supply grid. The method includes a first stage which is aimed at achieving an installation target PAnl,Soll for a power flow PAnl assigned to the installation at the grid connection point, and a second stage which is aimed at achieving an individual device target PGer,Soll,i for a power flow PGer,i of each device from the plurality of devices. On the basis of detection of a power flow PAnl of the installation at a grid connection point and a comparison of the detected power flow PAnl of the installation with the installation target PAnl,Soll, the installation is operated in the second stage if the detected power flow PAnl of the installation is within a tolerance range around the installation target PAnl,soll, or is otherwise operated in the first stage. A control unit and such an installation are likewise described.

公开(公告)号：US20160301312A1

公开(公告)日：2016-10-13

申请号：US15185756

申请日：2016-06-17

Applicant: SMA Solar Technology AG

Inventor： Alexander Unru ,  Martin Bock

IPC: H02M3/158 ,  H02M7/537

CPC classification number: H02M3/158 ,  H02J3/385 ,  H02M1/32 ,  H02M3/156 ,  H02M7/537 ,  H02M7/53871 ,  H02M2001/007 ,  H02M2001/327 ,  Y02E10/58

Abstract: A method and corresponding system for operating an inverter includes setting an input voltage (UPV) of the inverter by an input-side DC-DC converter and/or an output-side inverter bridge, wherein the input voltage (UPV) corresponds to an MPP voltage (UMPP) at which a generator connectable on the input side outputs a maximum electrical power, and determining a first temperature value (TDCDC) in the DC-DC converter and a second temperature value (TDCAC) in the inverter bridge. The method or corresponding system further includes changing the input voltage (UPV) of the inverter with respect to the MPP voltage (UMPP) if at least one of the determined temperature values (TDCDC, TDCAC) exceeds a limit value (Tmax,DCDC, Tmax,DCAC) assigned to the respective temperature values (TDCDC, TDCAC), increasing the input voltage (UPV) with respect to the MPP voltage (UMPP) if an exceedance of the limit value (Tmax,DCDC) for the first temperature value (TDCDC) in the DC-DC converter is determined and/or the MPP voltage (UMPP) lies below a predefined limit voltage (Ulimit), and otherwise reducing the input voltage (UPV) ith respect to the MPP voltage (UMPP).

Abstract translation: 用于操作逆变器的方法和相应的系统包括通过输入侧DC-DC转换器和/或输出侧逆变桥来设置逆变器的输入电压（UPV），其中输入电压（UPV）对应于MPP 电压（UMPP），其中在输入侧可连接的发电机输出最大电力，并确定DC-DC转换器中的第一温度值（TDCDC）和逆变器桥中的第二温度值（TDCAC）。 如果所确定的温度值（TDCDC，TDCAC）中的至少一个超过极限值（Tmax，DCDC，Tmax），则该方法或对应系统还包括相对于MPP电压（UMPP）改变逆变器的输入电压（UPV） 分配给相应温度值（TDCDC，TDCAC）的DCAC），相对于MPP电压（UMPP）增加输入电压（UPV），如果超过第一温度值（TDCDC）的极限值（Tmax，DCDC） ）和/或MPP电压（UMPP）低于预定极限电压（Ulimit），否则降低相对于MPP电压（UMPP）的输入电压（UPV）。