Emergency electric power supply system, emergency electric power supply method, and storage medium

1. An emergency electric power supply system comprising:

an electric power detection unit configured to detect that electric power supply from a first electric power system has stopped;

a plurality of charge and discharge devices which cause electric power to be transferred between a second electric power system, which is an electric power system different from the first electric power system and is connectable to a plurality of charge and discharge entities including an electric vehicle, and the charge and discharge entities; and

a control unit that controls at least some of the plurality of charge and discharge devices to supply electric power from the second electric power system to the electric vehicle when the electric power detection unit detects that the electric power supply from the first electric power system has stopped,

wherein the control unit controls at least some of the plurality of charge and discharge devices to supply the electric power preferentially to a specific electric vehicle as compared with other electric vehicles when the specific electric vehicle is connected to the second electric power system, the specific electric vehicle being an electric vehicle as an emergency vehicle.

2. The emergency electric power supply system according to claim 1 , wherein the control unit controls at least some of the plurality of charge and discharge devices to supply the electric power from the second electric power system to the electric vehicle when the electric power detection unit detects that the electric power supply from the first electric power system has stopped and a power storage amount of an on-vehicle battery used for travel of the electric vehicle is less than a threshold.

3. The emergency electric power supply system according to claim 1 , wherein the control unit controls at least some of the plurality of charge and discharge devices such that a power storage amount of each of at least one or more batteries of electric vehicles serving as electric power supply sources after supplying the electric power satisfies a constraint condition when the electric power is supplied from one electric vehicle to another electric vehicle via the second electric power system.

4. The emergency electric power supply system according to claim 1 ,

wherein the electric vehicle includes an electric vehicle having a power generation function, and

in the case in which the electric vehicle having the power generation function is connected to the second electric power system, the control unit requests the electric vehicle having the power generation function to generate electric power when an electric power amount that can be supplied through the second electric power system is insufficient for demand.

5. The emergency electric power supply system according to claim 1 ,

wherein a stationary battery is connected to the second electric power system, and

the control unit controls at least some of the plurality of charge and discharge devices such that the electric power is supplied from an electric vehicle connected to the stationary battery and the second electric power system to another electric vehicle.

6. An emergency electric power supply method causing a computer to execute processes of:

detecting that electric power supply from a first electric power system has stopped;

causing electric power to be transferred between a second electric power system, which is an electric power system different from the first electric power system and is connectable to a plurality of charge and discharge entities including an electric vehicle, and the charge and discharge entities; and

controlling at least some of a plurality of charge and discharge devices to supply electric power from the second electric power system to the electric vehicle when it is detected that the electric power supply from the first electric power system has stopped,

wherein controlling at least some of the plurality of charge and discharge devices to supply the electric power comprises controlling at least some of the plurality of charge and discharge devices to supply the electric power preferentially to a specific electric vehicle as compared with other electric vehicles when the specific electric vehicle is connected to the second electric power system, the specific electric vehicle being an electric vehicle as an emergency vehicle.

7. A non-transitory computer-readable storage medium which stores a program causing a computer to execute processes of:

detecting that electric power supply from a first electric power system has stopped;

causing electric power to be transferred between a second electric power system, which is an electric power system different from the first electric power system and is connectable to a plurality of charge and discharge entities including an electric vehicle, and the charge and discharge entities; and

controlling at least some of a plurality of charge and discharge devices to supply electric power from the second electric power system to the electric vehicle when it is detected that the electric power supply from the first electric power system has stopped,

wherein controlling at least some of the plurality of charge and discharge devices to supply the electric power comprises controlling at least some of the plurality of charge and discharge devices to supply the electric power preferentially to a specific electric vehicle as compared with other electric vehicles when the specific electric vehicle is connected to the second electric power system, the specific electric vehicle being an electric vehicle as an emergency vehicle.