公开(公告)号：US20140265596A1

公开(公告)日：2014-09-18

申请号：US13827630

申请日：2013-03-14

申请人： Zhenhuan YUAN ,  Shaofeng ZHANG ,  Haihui LU ,  Lixiang WEI ,  Russel J. Kerkman ,  Richard Lukaszewski ,  Ahmed Mohamed Sayed Ahmed ,  Robert J. Breitzmann

发明人： Zhenhuan YUAN ,  Shaofeng ZHANG ,  Haihui LU ,  Lixiang WEI ,  Russel J. Kerkman ,  Richard Lukaszewski ,  Ahmed Mohamed Sayed Ahmed ,  Robert J. Breitzmann

IPC分类号： H02J3/38

CPC分类号： H02J3/382 ,  H02J3/386 ,  H02J2003/388 ,  Y02E10/763 ,  Y10T307/642

摘要： Methods and apparatus are presented for unintentional islanding detection for grid tie converters in which the phase angle disturbance is introduced by modification of grid side converter switching control signals and a mismatch of reactive power between generation and the grid load is formed upon the occurrence of unintentional islanding, where the applied phase disturbance is determined according to two pre-defined curves to form an equivalent positive feedback at different frequencies to prevent the converter from forming an island at a new stable frequency after the grid is disconnected.

摘要翻译： 给出了并网转换器的无意孤立检测方法和装置，其中通过修改电网侧转换器开关控制信号引入相位角扰动，并且在无意孤岛发生时形成发电与电网负载之间的无功功率失配 其中施加的相位干扰根据两个预定义曲线确定，以在不同频率处形成等效的正反馈，以防止转换器在网格断开之后以新的稳定频率形成岛。