公开(公告)号：US09214817B2

公开(公告)日：2015-12-15

申请号：US13645620

申请日：2012-10-05

Applicant: SMA Solar Technology AG

Inventor： Stephanie Coors ,  Michael Viotto

IPC: H02J1/00 ,  H02J3/00 ,  H02J5/00 ,  H02J1/10 ,  H02J3/38

CPC classification number: H02J1/10 ,  H02J1/00 ,  H02J3/383 ,  H02J5/00 ,  Y02E10/563 ,  Y10T307/658

Abstract: A circuitry arrangement for a solar power plant includes a transformerless inverter for feeding electric power from at least one photovoltaic generator into an alternating power grid, a galvanic separation of all lines carrying current between the inverter and the power grid, and a DC voltage source in an offset path between one electric line at the input side of the galvanic separation and a reference potential. The DC voltage source provides an offset voltage. The offset path includes a DC branch and an AC branch connected in parallel. The direct voltage source is connected in series with a current sensor in the DC branch, and at least one capacitor is arranged in the AC branch. Further, a DC contactor triggered by the current sensor is arranged in the offset path.

Abstract translation: 一种用于太阳能发电厂的电路装置包括一个无变压器逆变器，用于将来自至少一个光伏发电机的电力馈送到交流电网中，在逆变器和电力网之间电流分离所有负载电流的线路，以及直流电压源 在电隔离的输入侧的一条电线与参考电位之间的偏移路径。 直流电压源提供偏移电压。 偏移路径包括并行连接的DC分支和AC分支。 直流电源与DC分支中的电流传感器串联连接，并且至少一个电容器布置在AC分支中。 此外，由电流传感器触发的DC接触器布置在偏移路径中。

公开(公告)号：US20140321166A1

公开(公告)日：2014-10-30

申请号：US14324299

申请日：2014-07-07

Applicant: SMA Solar Technology AG

Inventor： Stephanie Coors ,  Tobias Mueller ,  Oliver Prior

IPC: H02M7/42

CPC classification number: H02M7/42 ,  H02J3/08 ,  H02J3/383 ,  H02J3/40 ,  Y02E10/563 ,  Y10T307/735

Abstract: The invention relates to a process of connecting an AC output of a transformerless inverter of a solar power plant to an internal AC power grid at an input side of a galvanic isolation, while an offset voltage for shifting a potential center point of a photovoltaic generator connected to the inverter is applied. The process includes: (i) synchronizing the inverter with the power grid; (ii) essentially matching a potential center point of the current-carrying lines of the AC output and a potential center point of the power grid, while only one of the potential center points of the current-carrying lines and the power grid is yet shifted by the offset voltage; and (iii) galvanically connecting all current-carrying lines of the AC output with the power grid only after the steps of synchronizing and essentially matching.

Abstract translation: 本发明涉及一种将太阳能发电厂的无变压器逆变器的交流输出连接到电隔离输入侧的内部交流电网的过程，同时用于使光伏发电机的潜在中心点相连的偏移电压 到变频器应用。 该过程包括：（i）使逆变器与电网同步; （ii）基本上匹配交流输出的载流线路的电位中心点和电网的潜在中心点，而载流线路和电网的潜在中心点中只有一个仍然偏移 通过偏移电压; 和（iii）仅在同步和基本匹配的步骤之后将AC输出的所有载流线与电网电连接。

公开(公告)号：US08804390B2

公开(公告)日：2014-08-12

申请号：US13671914

申请日：2012-11-08

Applicant: SMA Solar Technology AG

Inventor： Stephanie Coors ,  Tobias Mueller ,  Oliver Prior

IPC: H02M7/44 ,  H02M7/5387

CPC classification number: H02M7/42 ,  H02J3/08 ,  H02J3/383 ,  H02J3/40 ,  Y02E10/563 ,  Y10T307/735

Abstract: The invention relates to a process of connecting an AC output of a transformerless inverter of a solar power plant to an internal AC power grid at an input side of a galvanic isolation, while an offset voltage for shifting a potential center point of a photovoltaic generator connected to the inverter is applied. The process includes: (i) synchronizing the inverter with the power grid; (ii) essentially matching a potential center point of the current-carrying lines of the AC output and a potential center point of the power grid, while only one of the potential center points of the current-carrying lines and the power grid is yet shifted by the offset voltage; and (iii) galvanically connecting all current-carrying lines of the AC output with the power grid only after the steps of synchronizing and essentially matching.

Abstract translation: 本发明涉及一种将太阳能发电厂的无变压器逆变器的交流输出连接到电隔离输入侧的内部交流电网的过程，同时用于使光伏发电机的潜在中心点相连的偏移电压 到变频器应用。 该过程包括：（i）使逆变器与电网同步; （ii）基本上匹配交流输出的载流线路的电位中心点和电网的潜在中心点，而载流线路和电网的潜在中心点中只有一个仍然偏移 通过偏移电压; 和（iii）仅在同步和基本匹配的步骤之后将AC输出的所有载流线与电网电连接。

公开(公告)号：US09401661B2

公开(公告)日：2016-07-26

申请号：US14324299

申请日：2014-07-07

Applicant: SMA Solar Technology AG

Inventor： Stephanie Coors ,  Tobias Mueller ,  Oliver Prior

IPC: H02M7/44 ,  H02M7/42 ,  H02J3/08 ,  H02J3/38 ,  H02J3/40 ,  H02M7/5387

CPC classification number: H02M7/42 ,  H02J3/08 ,  H02J3/383 ,  H02J3/40 ,  Y02E10/563 ,  Y10T307/735

Abstract: The invention relates to a process of connecting an AC output of a transformerless inverter of a solar power plant to an internal AC power grid at an input side of a galvanic isolation, while an offset voltage for shifting a potential center point of a photovoltaic generator connected to the inverter is applied. The process includes: (i) synchronizing the inverter with the power grid; (ii) essentially matching a potential center point of the current-carrying lines of the AC output and a potential center point of the power grid, while only one of the potential center points of the current-carrying lines and the power grid is yet shifted by the offset voltage; and (iii) galvanically connecting all current-carrying lines of the AC output with the power grid only after the steps of synchronizing and essentially matching.

Abstract translation: 本发明涉及一种将太阳能发电厂的无变压器逆变器的交流输出连接到电隔离输入侧的内部交流电网的过程，同时用于使光伏发电机的潜在中心点相连的偏移电压 到变频器应用。 该过程包括：（i）使逆变器与电网同步; （ii）基本上匹配交流输出的载流线路的电位中心点和电网的潜在中心点，而载流线路和电网的潜在中心点中只有一个仍然偏移 通过偏移电压; 和（iii）仅在同步和基本匹配的步骤之后将AC输出的所有载流线与电网电连接。

公开(公告)号：US20130121029A1

公开(公告)日：2013-05-16

申请号：US13671914

申请日：2012-11-08

Applicant: SMA Solar Technology AG

Inventor： Stephanie Coors ,  Tobias Mueller ,  Oliver Prior

IPC: H02J3/08 ,  H02M7/42

CPC classification number: H02M7/42 ,  H02J3/08 ,  H02J3/383 ,  H02J3/40 ,  Y02E10/563 ,  Y10T307/735

Abstract: The invention relates to a process of connecting an AC output of a transformerless inverter of a solar power plant to an internal AC power grid at an input side of a galvanic isolation, while an offset voltage for shifting a potential center point of a photovoltaic generator connected to the inverter is applied. The process includes: (i) synchronizing the inverter with the power grid; (ii) essentially matching a potential center point of the current-carrying lines of the AC output and a potential center point of the power grid, while only one of the potential center points of the current-carrying lines and the power grid is yet shifted by the offset voltage; and (iii) galvanically connecting all current-carrying lines of the AC output with the power grid only after the steps of synchronizing and essentially matching.

Abstract translation: 本发明涉及一种将太阳能发电厂的无变压器逆变器的交流输出连接到电隔离输入侧的内部交流电网的过程，同时用于使光伏发电机的潜在中心点相连的偏移电压 到变频器应用。 该过程包括：（i）使逆变器与电网同步; （ii）基本上匹配交流输出的载流线路的电位中心点和电网的潜在中心点，而载流线路和电网的潜在中心点中只有一个仍然偏移 通过偏移电压; 和（iii）仅在同步和基本匹配的步骤之后将AC输出的所有载流线与电网电连接。

公开(公告)号：US20130088086A1

公开(公告)日：2013-04-11

申请号：US13645620

申请日：2012-10-05

Applicant: SMA Solar Technology AG

Inventor： Stephanie Coors ,  Michael Viotto

IPC: H02J4/00

CPC classification number: H02J1/10 ,  H02J1/00 ,  H02J3/383 ,  H02J5/00 ,  Y02E10/563 ,  Y10T307/658

Abstract: A circuitry arrangement for a solar power plant includes a transformerless inverter for feeding electric power from at least one photovoltaic generator into an alternating power grid, a galvanic separation of all lines carrying current between the inverter and the power grid, and a DC voltage source in an offset path between one electric line at the input side of the galvanic separation and a reference potential. The DC voltage source provides an offset voltage. The offset path includes a DC branch and an AC branch connected in parallel. The direct voltage source is connected in series with a current sensor in the DC branch, and at least one capacitor is arranged in the AC branch. Further, a DC contactor triggered by the current sensor is arranged in the offset path.

Abstract translation: 一种用于太阳能发电厂的电路装置包括一个无变压器逆变器，用于将来自至少一个光伏发电机的电力馈送到交流电网中，在逆变器和电力网之间电流分离所有负载电流的线路，以及直流电压源 在电隔离的输入侧的一条电线与参考电位之间的偏移路径。 直流电压源提供偏移电压。 偏移路径包括并行连接的DC分支和AC分支。 直流电源与DC分支中的电流传感器串联连接，并且至少一个电容器布置在AC分支中。 此外，由电流传感器触发的DC接触器布置在偏移路径中。