公开(公告)号：US20220069576A1

公开(公告)日：2022-03-03

申请号：US17154292

申请日：2021-01-21

Applicant: LG Electronics Inc.

Inventor： Seung Wook HYUN ,  Chang Jin LIM ,  Sun Young PARK ,  Jungmin KIM

IPC: H02J3/00 ,  H02J3/40 ,  H02J3/46

Abstract: A power conditioning system (PCS) includes: a grid blackout determiner, a voltage controller, and a processor electrically connected to the grid blackout determiner and the voltage controller. The processor is configured to identify a state of a grid as a blackout state or an unstable state based on at least one of an amplitude or a frequency of a voltage of the grid that is detected by the grid blackout determiner, control the voltage controller to adjust, based on the identified state of the grid being the blackout state or the unstable state, load voltage input to the voltage controller to be equal to a command voltage, and adjust, based on the identified state of the grid being the blackout state or the unstable state, a first frequency of the detected voltage of the grid to a second frequency that is different from the first frequency.