公开(公告)号：US07138728B2

公开(公告)日：2006-11-21

申请号：US10280739

申请日：2002-10-25

申请人： Kevin E LeRow ,  Richard S Welches

发明人： Kevin E LeRow ,  Richard S Welches

IPC分类号： H02J1/00

CPC分类号： H02M7/493 ,  H02J3/38 ,  H02J3/40 ,  H02J2003/388 ,  Y10T307/398

摘要： Techniques for detecting an island in a system including a node that is operatively coupled to a primary power source (e.g., grid) and one or more distributed power generation sources are disclosed. In one embodiment, a current pulse is included in the output of a distributed power source. The grid voltage is monitored at the node to determine if a pulse-related disturbance occurs. If the grid is present, no pulse-related disturbance will manifest. If grid is down, then a pulse-related disturbance will manifest. Detection of the pulse-related disturbance is used to signal island detection.