THE SYSTEM AND METHOD OF DETECTING ISLANDING BY CHECKING FREQUENCY IN MICROGRID

摘要

Disclosed is a method to detect islanding in a microgrid by an islanding detection system. The method includes the steps of: collecting frequency information by unit time about a voltage of distributed power; calculating a frequency change rate through the collected frequency information; calculating an exceeded time if the frequency change rate exceeds a threshold value; and determining islanding if the calculated exceeded time is not lower than a predetermined time.