18593006. APPARATUS AND ISLANDING DETERMINATION METHOD IN DISTURBANCE AND DISTORTION SYSTEM (HYUNDAI MOBIS CO., LTD.)
Contents
APPARATUS AND ISLANDING DETERMINATION METHOD IN DISTURBANCE AND DISTORTION SYSTEM
Organization Name
Inventor(s)
Seung Min Hong of Suwon-si (KR)
Hyeong Su Kim of Hwaseong-si (KR)
APPARATUS AND ISLANDING DETERMINATION METHOD IN DISTURBANCE AND DISTORTION SYSTEM
This abstract first appeared for US patent application 18593006 titled 'APPARATUS AND ISLANDING DETERMINATION METHOD IN DISTURBANCE AND DISTORTION SYSTEM
Original Abstract Submitted
Apparatus and method for determining islanding of a system are provided. The method includes: calculating an amount of reactive power injection based on an active power command and reactive power command received from an upper controller of the distributed power; setting a failure confirmation count to 0; controlling injection of reactive power during a preset cycle among predetermined cycles of an AC voltage that is an output of the distributed power according to the failure confirmation count; measuring a frequency and angular frequency of the AC voltage, which is performed simultaneously with the injection of reactive power; and after the injection of reactive power is completed, increasing the failure confirmation count if a determination criteria based on the measurement of the frequency and the angular frequency of the AC voltage; and determining an islanding failure when the failure confirmation count reaches a preset value.
