公开(公告)号：US20170338654A1

公开(公告)日：2017-11-23

申请号：US15532386

申请日：2014-12-22

Applicant: ABB TECHNOLOGY LTD

Inventor： Sasitharan SUBRAMANIAN

IPC: H02J3/36 ,  H02J3/18 ,  H02M7/483 ,  H02M1/00

CPC classification number: H02J3/36 ,  H02J3/1857 ,  H02M7/483 ,  H02M2001/0077 ,  H02M2007/4835 ,  Y02E60/60

Abstract: An interface arrangement is configured to couple an alternating current, AC, power system with a direct current, DC, power system, or vice versa. The interface arrangement includes a plurality of series-connected converter modules. Each converter module includes at least one multi-level converter cell configured to provide a voltage contribution to at least a portion of an AC waveform for example based on voltage of the DC power system. Each converter module includes at least one converter valve, electrically connected to the multi-level converter cells and including at least two anti-parallel thyristors. The converter valves are switchable between conducting states with a selected current conduction direction and a non-conducting state so as to selectively control polarity of any voltage contribution provided by the at least one multi-level converter cell. The converter valves can also serve as fault protection, e.g. to divert overcurrents.

公开(公告)号：US20160118908A1

公开(公告)日：2016-04-28

申请号：US14897758

申请日：2013-06-14

Applicant: ABB TECHNOLOGY LTD

Inventor： Kalpesh Hirjibhai BHALODI ,  Lennart HARNEFORS ,  Sasitharan SUBRAMANIAN ,  Tomas JONSSON

IPC: H02M7/217

CPC classification number: H02M7/217 ,  H02M7/219 ,  H02M7/483 ,  H02M2001/0074 ,  H02M2007/4835

Abstract: An arrangement for tapping power from a DC power line to an AC power line includes power transfer modules between two DC potentials, each including a first branch with a string of converter cells in parallel with a second branch including a capacitor and being connected to an AC phase. There is at least one control unit that controls the arrangement considering one or more of a) distributing appropriate AC and DC voltages in converter output voltages of all series connected modules, b) maintaining/setting cell capacitor voltages in specific range and allowing boost mode operation, c) performing possible balancing of the introduced capacitor and d) employing an alternate approach of using passive filters to mitigate low order harmonics.

Abstract translation: 用于从DC电力线路到AC电力线的电力抽出的装置包括两个DC电势之间的功率传递模块，每个DC电势包括具有一串转换器单元的第一分支与包括电容器的第二分支并联连接到AC 相。 至少有一个控制单元，其考虑以下一个或多个控制装置：a）在所有串联连接的模块的转换器输出电压中分配适当的AC和DC电压，b）保持/设置单元电容器电压在特定范围内并允许升压模式操作 ，c）执行引入的电容器的可能平衡，以及d）采用使用无源滤波器以减轻低阶谐波的替代方法。