US 11,710,963 B2
Power conditioning system and method
Seung Wook Hyun, Seoul (KR); Chang Jin Lim, Seoul (KR); Sun Young Park, Seoul (KR); and Jungmin Kim, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Jan. 21, 2021, as Appl. No. 17/154,292.
Claims priority of application No. 10-2020-0112067 (KR), filed on Sep. 3, 2020.
Prior Publication US 2022/0069576 A1, Mar. 3, 2022
Int. Cl. H02J 3/00 (2006.01); H02J 3/46 (2006.01); H02J 3/40 (2006.01)
CPC H02J 3/0012 (2020.01) [H02J 3/40 (2013.01); H02J 3/46 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A power conditioning system (PCS), comprising:
a grid blackout determiner;
a voltage controller;
a three-phase command voltage generator; and
a processor electrically connected to the grid blackout determiner and the voltage controller,
wherein 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, a load voltage input to the voltage controller to be equal to a command voltage, wherein the load voltage includes voltage being consumed by at least one load that is electrically connected to the PCS,
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, and
control the three-phase command voltage generator to generate a three-phase command voltage having the second frequency to identify to at least one other PCS adjacent to the PCS the state of the grid being the blackout state or the unstable state.