公开(公告)号：US20170054291A1

公开(公告)日：2017-02-23

申请号：US15344013

申请日：2016-11-04

Applicant: ABB Schweiz AG

Inventor： LI QI ,  Jiuping Pan ,  Yao Chen ,  Guoju Zhang

IPC: H02J1/00 ,  H02H7/26 ,  H02M1/32 ,  H02M3/04 ,  H02M7/04

Abstract: Methods and apparatus for protecting a direct-current (DC) electric power distribution system that includes one or more AC/DC converters and/or one more DC/DC converters, and one or more loads, connected by DC buses. An example method, which is carried out in response to the detection of a fault somewhere in the system, begins with limiting an output current of each of one or more of the converters so that each of the limited converters outputs a limited DC current at or about a corresponding predetermined current level. After the current limiting of the one or more converters has taken place, one or more protection devices in the system are activated, where the activating at least partly depends on the limited DC currents being at or about the predetermined fault current levels.

Abstract translation: 用于保护包括一个或多个AC / DC转换器和/或一个DC / DC转换器的直流（DC）配电系统的方法和装置以及由DC总线连接的一个或多个负载。 响应于系统中某处的故障检测而执行的示例性方法开始于限制一个或多个转换器中的每一个的输出电流，使得每个受限转换器输出有限的直流电流或 关于相应的预定电流水平。 在一个或多个转换器的电流限制已经发生之后，系统中的一个或多个保护装置被激活，其中激活至少部分地取决于处于或围绕预定故障电流电平的有限的DC电流。