US 12,407,178 B2
Electric power control system and power supply system
Soichiro Bando, Kobe (JP); Ryosuke Goto, Kobe (JP); Yusuke Umezu, Kobe (JP); and Atsumori Yoshikawa, Kobe (JP)
Assigned to KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe (JP)
Appl. No. 17/637,534
Filed by KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe (JP)
PCT Filed Jul. 9, 2020, PCT No. PCT/JP2020/026868
§ 371(c)(1), (2) Date Feb. 23, 2022,
PCT Pub. No. WO2021/039144, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 2019-152471 (JP), filed on Aug. 23, 2019.
Prior Publication US 2022/0271553 A1, Aug. 25, 2022
Int. Cl. H02J 7/00 (2006.01); H02J 3/16 (2006.01); H02J 3/38 (2006.01); H02M 7/68 (2006.01)
CPC H02J 7/00712 (2020.01) [H02J 3/16 (2013.01); H02J 3/38 (2013.01); H02M 7/68 (2013.01); H02J 2207/20 (2020.01)] 11 Claims
OG exemplary drawing
 
1. An electric power control system comprising:
a bidirectional electric power converter including an AC terminal and a DC terminal, the AC terminal being connected to an AC power system, the DC terminal being connected to a DC power system to which one or more DC power loads are connected, the bidirectional electric power converter mutually converting AC power of the AC power system and DC power of the DC power system;
an electric power storage that is connected to the DC power system and stores electric power of the DC power system; and
a bidirectional electric power conversion controller that performs first control of controlling an output or input of the AC terminal of the bidirectional electric power converter such that a charge current, discharge current, charge electric power, or discharge electric power of the electric power storage coincides with a predetermined target current value or a predetermined target electric power value, wherein
the bidirectional electric power conversion controller performs second control of controlling the output or input of the AC terminal of the bidirectional electric power converter to suppress a fluctuation of at least one of electric power, voltage, current, or frequency of the AC power system such that the second control is superimposed on the first control.