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：US20180191270A1

公开(公告)日：2018-07-05

申请号：US15907336

申请日：2018-02-28

Applicant: SMA Solar Technology AG

Inventor： Pablo Ignacio Correa Vasquez ,  Andreas Knobloch

IPC: H02M7/487 ,  H02M7/5387 ,  H02M1/36 ,  H02M1/08 ,  G01R19/165 ,  G01R31/04 ,  G01R31/42

CPC classification number: H02M7/487 ,  G01R19/16547 ,  G01R31/041 ,  G01R31/42 ,  H02M1/08 ,  H02M1/32 ,  H02M1/36 ,  H02M7/53871 ,  H02M2001/0009

Abstract: A method and system for operating an inverter, which has a terminal with four conductor connectors for connection of the inverter to three outer conductors and to a neutral conductor of an AC voltage grid is disclosed. The method includes determining a connection configuration of the inverter to the AC voltage grid by actuating switching elements of a bridge circuit of the inverter to generate a zero-phase sequence system having a zero-phase sequence system current, and measuring and evaluating output currents of the inverter with respect to the zero-phase sequence system current. The method also includes identifying a presence of a connection of the neutral conductor to a conductor connector provided for connection to the neutral conductor when the zero-phase sequence system current exceeds a prescribed threshold value and identifying that the neutral conductor is not connected to the conductor connector provided for connection to the neutral conductor otherwise.

公开(公告)号：US10333426B2

公开(公告)日：2019-06-25

申请号：US15907336

申请日：2018-02-28

Applicant: SMA Solar Technology AG

Inventor： Pablo Ignacio Correa Vasquez ,  Andreas Knobloch

IPC: H02M7/537 ,  H02M7/487 ,  G01R31/42 ,  G01R29/16 ,  G01R31/02 ,  H02M1/36 ,  G01R19/165 ,  G01R31/04 ,  H02M1/08 ,  H02M7/5387 ,  H02M1/32 ,  H02M1/00

Abstract: A method and system for operating an inverter, which has a terminal with four conductor connectors for connection of the inverter to three outer conductors and to a neutral conductor of an AC voltage grid is disclosed. The method includes determining a connection configuration of the inverter to the AC voltage grid by actuating switching elements of a bridge circuit of the inverter to generate a zero-phase sequence system having a zero-phase sequence system current, and measuring and evaluating output currents of the inverter with respect to the zero-phase sequence system current. The method also includes identifying a presence of a connection of the neutral conductor to a conductor connector provided for connection to the neutral conductor when the zero-phase sequence system current exceeds a prescribed threshold value and identifying that the neutral conductor is not connected to the conductor connector provided for connection to the neutral conductor otherwise.

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。