| 摘要 |
PROBLEM TO BE SOLVED: To appropriately control the power distribution between DC power supplies, thereby suppressing the excess of electric power on the DC power supply.SOLUTION: A power supply system 1 comprises: a load 30; a power line 20 and an earth line 21 connected to the load 30; first and second DC power supplies 10a and 10b which can supply the load 30 with an electric power; a power converter 50 connected between each DC power supply, and the power line and the earth line; and a controller 40 for controlling the operation of the power converter. The DC power supplies can be connected in parallel with the power line and the earth line, of which the operation mode can be changed. At the beginning of a transition from a first operation mode to a second operation mode, the controller 40 sets an input/output electric power instruction value concerning the first or second DC power supply to a lower limit or larger value, thereby retaining a rate of each electric power instruction value input/output from the first or second DC power supply to a request power of the load within a predetermined range.SELECTED DRAWING: Figure 1 |
