公开(公告)号：US20150280607A1

公开(公告)日：2015-10-01

申请号：US14660346

申请日：2015-03-17

Applicant: SMA Solar Technology AG

Inventor： Volker Wachenfeld ,  Claus Allert ,  Christian Gehrke ,  Tobias Mueller ,  Pablo Ignacio Correa Vasquez ,  Florian Steiper

IPC: H02M7/42

CPC classification number: H02M7/42 ,  H02J3/383 ,  H02J9/062 ,  H02M7/48 ,  H02M7/487 ,  Y02B10/72

Abstract: A method for converting DC power from a source into AC power by means of an inverter which includes three bridge branches, each having a phase output, is described. During grid-connected operation, the bridge branches are actuated in such a way that the AC power is fed, as three-phase grid-compliant power, into a grid. During emergency operation of the inverter, the AC power is provided as single-phase island grid by two of the three bridge branches at the phase outputs thereof, wherein the inverter is disconnected from the grid.

Abstract translation: 描述了通过包括三个具有相位输出的桥接分支的逆变器将来自源的直流电力转换为交流电力的方法。 在并网运行期间，电桥分支以这样的方式启动，使得AC电力作为三相并网电力馈送到电网中。 在逆变器的紧急运行期间，三相桥式分支中的两个在相位输出端由交流电源提供为单相岛电网，其中逆变器与电网断开连接。

公开(公告)号：US09369062B2

公开(公告)日：2016-06-14

申请号：US14660346

申请日：2015-03-17

Applicant: SMA Solar Technology AG

Inventor： Volker Wachenfeld ,  Claus Allert ,  Christian Gehrke ,  Tobias Mueller ,  Pablo Ignacio Correa Vasquez ,  Florian Steiper

IPC: H02J3/38 ,  H02M7/42 ,  H02M7/48 ,  H02J9/06 ,  H02M7/487

CPC classification number: H02M7/42 ,  H02J3/383 ,  H02J9/062 ,  H02M7/48 ,  H02M7/487 ,  Y02B10/72

Abstract: A method for converting DC power from a source into AC power by means of an inverter which includes three bridge branches, each having a phase output, is described. During grid-connected operation, the bridge branches are actuated in such a way that the AC power is fed, as three-phase grid-compliant power, into a grid. During emergency operation of the inverter, the AC power is provided as single-phase island grid by two of the three bridge branches at the phase outputs thereof, wherein the inverter is disconnected from the grid.

Abstract translation: 描述了通过包括三个具有相位输出的桥接分支的逆变器将来自源的直流电力转换为交流电力的方法。 在并网运行期间，电桥分支以这样的方式启动，使得AC电力作为三相并网电力馈送到电网中。 在逆变器的紧急运行期间，三相桥式分支中的两个在相位输出端由交流电源提供为单相岛电网，其中逆变器与电网断开连接。

公开(公告)号：US11736001B2

公开(公告)日：2023-08-22

申请号：US16906070

申请日：2020-06-19

Applicant: SMA Solar Technology AG

Inventor： Florian Steiper ,  Christian Gehrke

IPC: H02M1/36 ,  H02J3/38 ,  G01R19/165 ,  H02M1/32 ,  H02M3/156 ,  H02M7/5387 ,  H02M1/00

CPC classification number: H02M1/36 ,  G01R19/16528 ,  H02J3/381 ,  H02M1/32 ,  H02M3/156 ,  H02M7/53871 ,  H02J2300/24 ,  H02M1/0003 ,  H02M1/322

Abstract: A method for discharging a capacitor of an input or output circuit arrangement of an inverter for supplying current to a power supply grid includes determining voltage readings at connections of the input or output circuit arrangement and a DC link capacitor of the inverter; and calculating an upper limit voltage value of the DC link capacitor based on the measured values. The method also includes operating a DC/DC converter or a bridge arrangement of the inverter such that energy from the capacitor of the input or output circuit arrangement is transferred to the DC link capacitor, ending the method if the voltage across the DC link capacitor exceeds the upper voltage limit. Otherwise the method continues to transfer energy from the capacitor of the input or output circuit arrangement to the DC link capacitor until the capacitor is discharged to or below a lower limit voltage value.

公开(公告)号：US20200321852A1

公开(公告)日：2020-10-08

申请号：US16906070

申请日：2020-06-19

Applicant: SMA Solar Technology AG

Inventor： Florian Steiper ,  Christian Gehrke

IPC: H02M1/32 ,  H02M7/5387 ,  H02J3/38 ,  H02M3/156 ,  G01R19/165

Abstract: A method for discharging a capacitor of an input or output circuit arrangement of an inverter for supplying current to a power supply grid is disclosed. The method includes determining a supply voltage at connections of the input or output circuit arrangement, determining a DC link voltage of a DC link capacitor of the inverter; and calculating an upper limit voltage value of the DC link capacitor based on the measured supply voltage and the measured DC link voltage. The method also includes operating an input-side DC/DC converter or an output-side bridge arrangement of the inverter such that energy from the capacitor of the input or output circuit arrangement is transferred to the DC link capacitor, wherein the voltage across the DC link capacitor is monitored; and ending the method if the voltage across the DC link capacitor exceeds the upper limit voltage value. Otherwise the method continues to transfer energy from the capacitor of the input or output circuit arrangement to the DC link capacitor until the capacitor is discharged to or below a lower limit voltage value.