Connected DC power distribution system, power adjustment method and program

1 . A connection direct-current power distribution system comprising:

a first direct-current power distribution system having a first voltage range;

a second direct-current power distribution system having a voltage range narrower than the first voltage range;

a switch and a converter between the first direct-current power distribution system and the second direct-current power distribution system,

wherein the switch is caused to enter a connected state, and power from a first storage battery in the first direct-current power distribution system is supplied to the second direct-current power distribution system via the converter configured to adjust a voltage of the power.

2 . The connection direct-current power distribution system according to claim 1 , wherein the second direct-current power distribution system includes a second storage battery and a second converter, and is configured to supply power from the second storage battery to a load via the second converter, and a voltage equal to or higher than an output voltage of the second converter is set as an output voltage of the converter, so that the output of power is started from the converter.

3 . The connection direct-current power distribution system according to claim 1 , wherein, when an index value indicating a remaining capacity of the first storage battery becomes equal to or smaller than a predetermined threshold value, the output of the converter is stopped.

4 . The connection direct-current power distribution system according to claim 3 , wherein, when the output of the converter is stopped, the switch is caused to enter a disconnected state after an output current from the converter becomes zero.

5 . The connection direct-current power distribution system according to claim 1 , further comprising:

a power determiner configured to calculate a capacity of power that is able to be supplied from the first storage battery to the second direct-current power distribution system and a time in which the power is able to be supplied, on the basis of an amount of power that is able to be supplied by the first storage battery and power used by a load connected to the first direct-current power distribution system; and

a display configured to display the capacity of power that is able to be supplied and the time in which the power is able to be supplied, the capacity and the time being calculated by the power determiner.

6 . The connection direct-current power distribution system according to claim 5 , wherein the power determiner is further configured to:

learn a model using an actual value of the amount of power that is able to be supplied by the first storage battery, an actual value of power used by a load connected to the first direct-current power distribution system, and an actual value of the capacity of power that is able to be supplied from the first storage battery to the second direct-current power distribution system and the time in which the power is able to be supplied, and

calculate the capacity of power that is able to be supplied from the first storage battery to the second direct-current power distribution system and the time in which the power is able to be supplied, by using the learned model.

7 . A voltage adjustment method in a connection direct-current power distribution system including a first direct-current power distribution system having a first voltage range, a second direct-current power distribution system having a voltage range narrower than the first voltage range, a switch and a converter included between the first direct-current power distribution system and the second direct-current power distribution system, the voltage adjustment method comprising:

controlling a connection between the first direct-current power distribution system and the second direct-current power distribution system using the switch, the connection including a connected state and a disconnected state,

wherein when the connection is in the connected state, power from a first storage battery in the first direct-current power distribution system is supplied to the second direct-current power distribution system via the converter to adjust a voltage of the power.

8 . A computer-readable non-transitory medium storing computer-executable program instructions, that when executed by a processor causes a computer to perform the method of claim 7 .

9 . The computer-readable non-transitory medium of claim 8 , wherein the instructions when executed by the processor further cause the computer to:

calculate a capacity of power that is able to be supplied from the first storage battery to the second direct-current power distribution system and a time in which the power is able to be supplied, on the basis of an amount of power that is able to be supplied by the first storage battery and power used by a load connected to the first direct-current power distribution system; and

display the capacity of power that is able to be supplied and the time in which the power is able to be supplied.

10 . The computer-readable non-transitory medium of claim 8 , wherein the second direct-current power distribution system includes a second storage battery and a second converter.

11 . The computer-readable non-transitory medium of claim 8 , wherein the instructions when executed by the processor further cause the computer to:

stop the output of the converter when an index value indicating a remaining capacity of the first storage battery becomes equal to or smaller than a predetermined threshold value.

12 . The voltage adjustment method of claim 7 , further comprising:

calculating a capacity of power that is able to be supplied from the first storage battery to the second direct-current power distribution system and a time in which the power is able to be supplied, on the basis of an amount of power that is able to be supplied by the first storage battery and power used by a load connected to the first direct-current power distribution system; and

displaying the capacity of power that is able to be supplied and the time in which the power is able to be supplied.

13 . The voltage adjustment method of claim 12 , further comprising:

learning a model using an actual value of the amount of power that is able to be supplied by the first storage battery, an actual value of power used by a load connected to the first direct-current power distribution system, and an actual value of the capacity of power that is able to be supplied from the first storage battery to the second direct-current power distribution system, and the time in which the power is able to be supplied; and

calculating the capacity of power that is able to be supplied from the first storage battery to the second direct-current power distribution system and the time in which the power is able to be supplied, by using the learned model.

14 . The voltage adjustment method of claim 13 , further comprising:

supplying power from the second storage battery to a load via the second converter, and a voltage equal to or higher than an output voltage of the second converter is set as an output voltage of the converter, so that the output of power is started from the converter.

15 . The voltage adjustment method of claim 14 , further comprising:

in response to determining that the output of the converter has been stopped and an output current from the converter becomes zero, causing the connection to enter a disconnected state.

16 . The computer-readable non-transitory medium of claim 15 , wherein the instructions when executed by the processor further cause the computer to:

learn a model using an actual value of the amount of power that is able to be supplied by the first storage battery, an actual value of power used by a load connected to the first direct-current power distribution system, and an actual value of the capacity of power that is able to be supplied from the first storage battery to the second direct-current power distribution system, and the time in which the power is able to be supplied; and

calculate the capacity of power that is able to be supplied from the first storage battery to the second direct-current power distribution system and the time in which the power is able to be supplied, by using the learned model.

17 . The computer-readable non-transitory medium of claim 16 , wherein the instructions when executed by the processor further cause the computer to:

supply power from the second storage battery to a load via the second converter, and a voltage equal to or higher than an output voltage of the second converter is set as an output voltage of the converter, so that the output of power is started from the converter.

18 . The computer-readable non-transitory medium of claim 17 , wherein the instructions when executed by the processor further cause the computer to:

in response to the determination that the output of the converter has been stopped and an output current from the converter becomes zero, cause the connection to enter a disconnected state.

19 . The voltage adjustment method of claim 7 , wherein the second direct-current power distribution system includes a second storage battery and a second converter.

20 . The voltage adjustment method of claim 7 , further comprising:

stopping the output of the converter when an index value indicating a remaining capacity of the first storage battery becomes equal to or smaller than a predetermined threshold value.