公开(公告)号：US20150338472A1

公开(公告)日：2015-11-26

申请号：US14655298

申请日：2013-02-12

Applicant: ABB TECHNOLOGY LTD

Inventor： Reynaldo Nuqui ,  Jiuping Pan ,  Jianping Wang

IPC: G01R31/40

CPC classification number: G01R31/40 ,  G01R31/025 ,  H02H3/087 ,  H02H7/268

Abstract: A method to facilitate fault detection in the protected unit after connection to the at least a portion of the power system. A current is sensed in the protected unit during a plurality of different time periods. Compliance of at least one of the sensed currents with a respective first current criteria is determined based on a first current threshold value. On a condition that there is determined that at least one of the sensed currents comply with the respective first current criteria, a fault in the protected unit is detected.

Abstract translation: 一种用于在连接到电力系统的至少一部分之后促进受保护单元中的故障检测的方法。 在多个不同时间段期间，在被保护单元中感测到电流。 基于第一电流阈值来确定具有相应的第一电流标准的至少一个感测电流的符合性。 在确定感测到的电流中的至少一个符合相应的第一当前准则的情况下，检测到受保护单元中的故障。