US 12,113,364 B2
Power storage system and control device
Yasuaki Mitsugi, Tokyo (JP)
Assigned to TMEIC CORPORATION, Tokyo (JP)
Appl. No. 17/922,384
Filed by TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION, Tokyo (JP)
PCT Filed Feb. 17, 2021, PCT No. PCT/JP2021/005870
§ 371(c)(1), (2) Date Oct. 31, 2022,
PCT Pub. No. WO2022/176052, PCT Pub. Date Aug. 25, 2022.
Prior Publication US 2023/0187941 A1, Jun. 15, 2023
Int. Cl. H02J 3/38 (2006.01); H02J 3/16 (2006.01); H02J 3/32 (2006.01); H02J 7/00 (2006.01)
CPC H02J 3/38 (2013.01) [H02J 3/16 (2013.01); H02J 3/32 (2013.01); H02J 7/0048 (2020.01); H02J 2207/20 (2020.01)] 11 Claims
OG exemplary drawing
 
1. A power storage system, comprising:
a plurality of power storage devices capable of discharging and charging direct current power;
a plurality of power conversion devices connected to the plurality of power storage devices and a load, the plurality of power conversion devices converting the direct current power stored in the plurality of power storage devices into power corresponding to the load, the plurality of power conversion devices supplying the power to the load based on the direct current power stored in the plurality of power storage devices, the plurality of power conversion devices converting power of the load into direct current power corresponding to the plurality of power storage devices, the plurality of power conversion devices charging the plurality of power storage devices based on the power of the load side; and
a control device controlling a power conversion operation of the plurality of power conversion devices,
the control device including
an output value determination part determining a total value of active power and a total value of reactive power output from the plurality of power conversion devices,
a number determination part determining, based on the total value of the active power and the total value of the reactive power, a number of the power conversion devices among the plurality of power conversion devices to which an operation command is to be transmitted,
a conversion device determination part determining, as the power conversion devices to which the operation command is to be transmitted, prescribed power conversion devices among the plurality of power conversion devices of the number determined by the number determination part, and
a command transmitting part transmitting the operation command to the power conversion devices determined by the conversion device determination part and transmitting a standby command to the remaining power conversion devices among the plurality of power conversion devices to which the operation command is not transmitted,
wherein the conversion device determination part includes a priority list representing priorities of the plurality of power conversion devices and determines, as the power conversion devices to which the operation command is to be transmitted, the power conversion devices among the plurality of power conversion devices of the number determined by the number determination part in descending order of the priorities of the priority list.