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2. 发明公开

EP2779403A1 Power conversion system and method 有权
标题翻译：电力转换系统和方法
公开(公告)号：EP2779403A1
公开(公告)日：2014-09-17
申请号：EP14159193.3
申请日：2014-03-12
申请人： GE Energy Power Conversion Technology Ltd
发明人： Garces, Luis Jose , Zhang, Richard S. , Harbourt, Cyrus David , Ritter, Allen Michael , Datta, Rajib
IPC分类号： H02M5/14 , H02M7/487 , H02M7/497
摘要： A power conversion system (10) includes a first converter (18) effectively connected in series to a second converter (20). Each converter has a plurality of output levels. A phase-shifted transformer (22) is coupled to the converters. The phase-shifted transformer (22) has a delta-wound winding (7) and an open star winding (6). The first converter (18) is coupled to the open star winding (6) and the second converter (20) is coupled to the delta winding (7). The open star winding (6) is configured for direct connection to either of a load (24) or the open star winding of a second phase-shifted transformer, having a delta winding connected to a third converter. One or more DC voltage sources (14, 16) are each connected to the first and second converters (18, 20) by a respective DC link capacitor (30, 32). Each DC voltage source (14, 16) is connected to a common power grid (12) by an isolated multiphase transformer winding (34, 36).
摘要翻译：功率转换系统（10）包括有效串联连接到第二转换器（20）的第一转换器（18）。每个转换器都有多个输出电平。移相变压器（22）耦合到变换器。移相变压器（22）具有三角绕组（7）和开星绕组（6）。第一转换器（18）耦合到开放星形绕组（6），并且第二转换器（20）耦合到三角形绕组（7）。开放星形绕组（6）被配置用于直接连接到第二移相变压器的负载（24）或开路星形绕组中的任一个，其具有连接到第三转换器的三角形绕组。一个或多个DC电压源（14,16）各自通过相应的DC链路电容器（30,32）连接到第一和第二转换器（18,20）。每个DC电压源（14,16）通过隔离的多相变压器绕组（34,36）连接到公共电网（12）。

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