公开(公告)号：KR1020080043088A

公开(公告)日：2008-05-16

申请号：KR1020060111675

申请日：2006-11-13

Applicant: 한국에너지기술연구원

Inventor： 유병규 ,  정영석 ,  소정훈 ,  유권종

IPC: H02J3/12 ,  G01R19/00

Abstract: A high power quality islanding detecting method using effective power variation is provided to alleviate impact on a commercial system by applying a current having a designed value for a predetermined time. A high power quality islanding detecting method using effective power variation includes the steps of: matching zero crossing of output voltage through data sampling(S100,S110); periodically varying output current of an inverter in the zero crossing state(S120); varying the output voltage according to the variation of the output current; and detecting islanding by using an active frequency drift of the output current when varying the output voltage.

Abstract translation: 提供了一种使用有效功率变化的高功率质量孤岛检测方法，以通过施加具有预定时间的设计值的电流来减轻对商业系统的影响。 使用有效功率变化的高功率质量孤岛检测方法包括以下步骤：通过数据采样来匹配输出电压的零交叉（S100，S110）; 在过零状态下周期性地改变逆变器的输出电流（S120）; 根据输出电流的变化改变输出电压; 以及当改变输出电压时通过使用输出电流的有源频率漂移来检测孤岛。