公开(公告)号：US20140098449A1

公开(公告)日：2014-04-10

申请号：US14049751

申请日：2013-10-09

Applicant: ABB Oy

Inventor： Janne HELLBERG ,  Kimmo Heinonen ,  Jari Uusimäki

IPC: G01R31/28

CPC classification number: G01R31/28 ,  H02J3/381 ,  H02J2003/388

Abstract: A method and an arrangement are disclosed for detecting islanding operation of a distributed power generator. The method can include determining a frequency of a grid to which the distributed power generator is connected, measuring a rate of change of the frequency of the grid at an output of the distributed power generator, determining a threshold value for an alteration speed, comparing the rate of change of the frequency of the grid with the threshold value, and detecting islanding operation when the measured rate of change of the frequency exceeds the threshold value for a certain time period.

Abstract translation: 公开了一种用于检测分布式发电机的孤岛运行的方法和装置。 该方法可以包括确定分布式发电机连接到的电网的频率，测量在分布式发电机的输出处的电网频率的变化率，确定改变速度的阈值， 电网频率随阈值变化的速率，以及当所测量的频率变化率超过阈值一定时间段时检测孤岛作业。

公开(公告)号：US09494637B2

公开(公告)日：2016-11-15

申请号：US14049751

申请日：2013-10-09

Applicant: ABB Oy

Inventor： Janne Hellberg ,  Kimmo Heinonen ,  Jari Uusimäki

IPC: H02J1/00 ,  G01R31/28 ,  H02J3/38

CPC classification number: G01R31/28 ,  H02J3/381 ,  H02J2003/388

Abstract: A method and an arrangement are disclosed for detecting islanding operation of a distributed power generator. The method can include determining a frequency of a grid to which the distributed power generator is connected, measuring a rate of change of the frequency of the grid at an output of the distributed power generator, determining a threshold value for an alteration speed, comparing the rate of change of the frequency of the grid with the threshold value, and detecting islanding operation when the measured rate of change of the frequency exceeds the threshold value for a certain time period.

Abstract translation: 公开了一种用于检测分布式发电机的孤岛运行的方法和装置。 该方法可以包括确定分布式发电机连接到的电网的频率，测量在分布式发电机的输出处的电网频率的变化率，确定改变速度的阈值， 电网频率随阈值变化的速率，以及当所测量的频率变化率超过阈值一定时间段时检测孤岛作业。