US 12,119,757 B2
Power supply system including a plurality of power conversion devices to supply AC or DC power
Takuya Kataoka, Tokyo (JP); Kikuo Izumi, Tokyo (JP); and Yusuke Higaki, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 17/802,141
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Apr. 21, 2020, PCT No. PCT/JP2020/017133
§ 371(c)(1), (2) Date Aug. 25, 2022,
PCT Pub. No. WO2021/214851, PCT Pub. Date Oct. 28, 2021.
Prior Publication US 2023/0072540 A1, Mar. 9, 2023
Int. Cl. H02M 7/08 (2006.01); H02J 3/46 (2006.01); H02M 1/00 (2007.01)
CPC H02M 7/08 (2013.01) [H02J 3/46 (2013.01); H02M 1/0006 (2021.05)] 13 Claims
OG exemplary drawing
 
1. A power supply system to convert power received from a main power source to supply AC power or DC power, and output the converted power to a DC system, the power supply system comprising:
a plurality of power conversion devices provided between the main power source and the DC system and connected in parallel with each other;
a state detector to detect an operating state of at least one load connected to the DC system; and
a command generator to generate a voltage command that is a command value of voltage distributed from the power supply system to the DC system,
each of the power conversion devices including
a voltage controller to generate a power command based on a voltage of the DC system and the voltage command, and
a converter to convert power received from the main power source based on the power command and output the converted power to the DC system,
wherein the command generator generates the voltage command such that loss of the at least one load connected to the DC system is reduced, based on a detection result of the state detector.