Power delivery system and power delivery method

Abstract

To provide a power delivery system and a power delivery method delivering power between different power systems.SOLUTION: A power delivery system has a plurality of first accumulator batteries disposed on a plurality of power systems, a plurality of first charge / discharge devices charging / discharging the plurality of first accumulator batteries, a plurality of second charge / discharge devices charging / discharging a plurality of second accumulator batteries, and a moving device moving the second accumulator batteries from a first power system to a second power system. The first charge / discharge devices of the first power system charge the first accumulator batteries by surplus power of the first power system, the second charge / discharge devices of the first power system charge the second accumulator batteries by not only the surplus power of the first power system but also discharge power of the first accumulator batteries, the second charge / discharge devices of the second power system charge the first accumulator batteries by the discharge power of the second accumulator batteries, and the first charge / discharge devices of the second power system supply the discharge power of the first accumulator batteries of the second power system to the second power system.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] Embodiments of the present invention relate to a power distribution system and a power distribution method.

Background Art

[0002] A system for distributing power using electric vehicles (hereinafter referred to as EVs) has been developed. Generators and storage batteries are installed in multiple stores of a certain company. Each store consumes the power generated by the generator. The surplus power among the power generated by the generator is charged into the storage battery.

[0003] When the power generated by the first store is less than the demand, the power stored in the storage batteries of other stores is discharged, and the discharge power is charged into the in-vehicle battery of the EV. The EV travels to the first store. The power stored in the in-vehicle battery of the EV is discharged, and the discharge power is charged into the storage battery of the first store. The first store consumes the discharge power of the storage battery. Thereby, power is distributed between the store with power shortage and the store with power surplus, and the occurrence of power shortage is avoided.

[0004] This system distributes power between stores of a single company using EVs. This system cannot distribute power between different power systems. It is impossible.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] An object of the present invention is to provide a power distribution system and a power distribution method for distributing power between different power systems.

Means for Solving the Problems

[0007] The power distribution system according to the embodiment includes a plurality of first storage batteries deployed in each of a plurality of power systems, a plurality of first charge / discharge devices for charging and discharging each of the plurality of first storage batteries, a movable second storage battery, a plurality of second charge / discharge devices deployed in each of the plurality of power systems for charging and discharging the second storage battery, and a moving device for moving the second storage battery from a first power system to a second power system among the plurality of power systems. The first charge / discharge device of the first power system charges the first storage battery with power in which the supply power of the first power system exceeds the demand power. The second charge / discharge device of the first power system charges the second storage battery with the discharge power of the first storage battery in addition to the power in which the supply power of the first power system exceeds the demand power. The second charge / discharge device of the second power system discharges the second storage battery and supplies the discharge power of the second storage battery to the second power system.

Brief Description of the Drawings

[0008]

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Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments will be described with reference to the drawings. The following description exemplifies devices and methods for embodying the technical idea of the embodiments. The technical idea of the embodiments is not limited to the structure, shape, arrangement, material, etc. of the components described below. Modifications that can be easily conceived by those skilled in the art are naturally included in the scope of the disclosure. For the sake of clarity in the description, in the drawings, the size, thickness, planar dimensions, shape, etc. of each element may be changed with respect to the actual element and represented schematically. In a plurality of drawings, there may be elements whose dimensional relationships and ratios to each other are different. In a plurality of drawings, corresponding elements may be given the same reference numerals and duplicate descriptions may be omitted. There may be cases where a plurality of names are given to some elements, but these examples of names are merely illustrative and do not deny the attachment of other names to these elements. Nor does it deny the attachment of other names to elements that do not have a plurality of names attached. "Connection" includes not only direct connection but also connection via other elements. When the number of elements is not specified as plural, the element may be a single element or a plurality of elements.

[0010] First Embodiment Figures 1 and 2 are block diagrams for explaining an example of a power distribution system according to the first embodiment. An example of the power distribution system includes a server 10, a plurality of power systems 12, and a mobile unit 14. The server 10 is a server of an organization that manages a plurality of power systems 12 such as an Organization for Cross-regional Coordination of Transmission Operators (OCCTO), and functions as a system controller that coordinates power among the plurality of power systems. The power distribution system includes two power systems 12a and 12b. For convenience of explanation, Figures 1 and 2 show the power systems 12a and 12b separated from each other, but the power systems 12a and 12b may be adjacent to each other and connected to each other.

[0011] A system connection line 36 is connected between the power systems 12a and 12b. When there is no need to particularly distinguish between the power systems 12a and 12b, they are referred to as the power system 12. The power system 12 is connected to the server 10 by wire or wirelessly. The power system 12 may be connected to the server 10 via a network. The administrator of the mobile unit 14 is wirelessly connected to the server 10. The server 10 is not deployed alone and may be deployed within the power system 12.

[0012] The power system 12 is classified into a large-scale power system (referred to as a grid) constructed for each area that divides the whole country into a plurality of areas, and a small-scale power system (referred to as a microgrid) constructed in municipalities, business offices of companies, large buildings, etc. The power system 12 may be a grid or a microgrid.

[0013] Each power system 12 includes a power generation device 20, a consumer 22, a battery system 23, a charge / discharge device 28, a controller 32, and a power grid 34. The power grid 34 is connected to the system connection line 36. When the power system 12 is a grid, the power generation device 20 may be a large-capacity power plant such as a nuclear power plant or a thermal power plant. When the power system 12 is a microgrid, the power generation device 20 may be a small-capacity generator that generates renewable energy, for example, a solar power generator (also referred to as a solar cell) or a wind power generator.

[0014] The battery system 23 includes a charge / discharge device 25 and a battery 27. The power generation device 20, the consumer 22, and the charge / discharge device 28 may include the battery system 23. The number of independent battery systems 23 deployed alone in the power grid 12 may be singular or plural. The number of battery systems 23 deployed in the power generation device 20, the consumer 22, and the charge / discharge device 28 may be singular or plural. The power grid 12 only needs to include at least one battery system 23. The number of batteries 27 and charge / discharge devices 25 within the battery system 23 may be singular or plural.

[0015] The charge / discharge device 25 charges the battery 27 with the surplus power of the power grid 34. The surplus power is the difference between the power supply amount and the power demand amount. The power supply amount is the sum of the power supplied to the power grid 12 via the grid connection line 36, the generated power of the power generation device 20, and the discharge power of the battery 27. The power demand amount is the power consumption of the consumer 22. When the surplus power decreases, the charge / discharge device 25 discharges the battery 27 and supplies the discharge power to the power grid 34. The discharge power is supplied to the consumer 22. The battery 27 is a stationary large-scale in-grid battery. An example of the battery 27 is a lithium-ion battery.

[0016] The charge / discharge device 28 charges the battery 30 with the surplus power of the power grid 12. The charge / discharge device 28 discharges the battery 30 and supplies the discharge power to the power grid 34. The discharge power is supplied to the consumer 22. The number of batteries 30 may be plural. The charge / discharge device 28 may include the battery 27, and in that case, it includes the charge / discharge device 25 that charges and discharges the battery 27.

[0017] The battery 30 is moved between power grids 12 by the moving body 14. The battery 30 only needs to be movable, and its size / shape is arbitrary. For example, the size of the battery 30 may be the size / hand luggage shape that can be moved by a motorcycle, a private car, a drone, etc., or the large size / cargo shape such as a container that can be moved by a truck, a freight train, etc. An example of the battery 30 is a lithium-ion battery.

[0018] Examples of the mobile body 14 include a kick scooter, a cart, a two-wheeler, an automobile, a drone, a truck, a trailer, a freight train, a cargo ship, and an aircraft. Examples of the mobile body 14 may also include an electric kick scooter, an electric cart, an electric motorcycle, and an electric vehicle. The mobile body 14 is moved by an administrator and moves the storage battery 30. The number of the mobile bodies 14 may be plural.

[0019] The controller 32 is connected to the power generation device 20, the consumer 22, the storage battery system 23, and the charge / discharge device 28, and is also connected to the server 10. The controller 32 transmits to the server 10 the power supply amount of the power system 12 (the sum of the power generation amount of the power generation device 20, the remaining power amount of the storage battery 27, and the power amount supplied to the power system 12 via the system connection line 36) and the power demand amount of the consumer 22. The server 10 notifies the administrator of the mobile body 14 and the administrator of the power system 12 of the power distribution plan regarding power distribution. The server 10 may transmit the power distribution plan to the mobile terminal (for example, a smartphone) of the administrator related to power distribution. The server 10 may transmit the power distribution plan to the terminal (for example, a PC) of the power system 12. Based on the power distribution plan, the administrator moves the storage battery 30 from the charge / discharge device 28 at the delivery source to the charge / discharge device 28 at the delivery destination using the mobile body 14. Thereby, power is distributed between the power systems via the storage battery 30.

[0020] FIG. 3 is a flowchart for explaining an example of the power distribution method according to the first embodiment. In each power system 12, the charge / discharge device 25 charges the storage battery 27 with the surplus power of the power grid 34 in a timely manner. The charge / discharge device 25 performs charge / discharge control so as to operate within a predetermined range of the capacity of the storage battery 27, for example, from about 80% to about 10%.

[0021] Based on the history of the power demand amount of the power system 12, the server 10 obtains the demand prediction amount, determines a power system (delivery source) in which the power supply amount is equal to or greater than the demand prediction amount and power is likely to be surplus, and a power system (delivery destination) in which the power supply amount is less than the demand prediction amount and power is likely to be insufficient (step 302). For example, the server 10 determines the power system 12a as the delivery source and the power system 12b as the delivery destination.

[0022] Server 10 instructs the smartphone of the administrator of the mobile body 14 and the terminal of the administrator of the power systems 12a and 12b to perform "power distribution from power system 12a to power system 12b (power distribution plan)" (step 304). In the description of FIG. 3, the mobile body 14 is an automobile, its administrator is a driver, and it is assumed that the battery 30 is owned by the driver.

[0023] The driver mounts the battery 30 on the automobile 14 and drives the automobile 14 to the installation location of the charging / discharging device 28a of the power system 12a (step 306). The distribution plan transmitted by the server 10 to the smartphone includes the installation location of the charging / discharging device 28a at the distribution source and the installation location of the charging / discharging device 28b at the distribution destination.

[0024] The driver removes the battery 30 from the automobile 14 and connects the battery 30 to the charging / discharging device 28a (step 308).

[0025] In accordance with the power distribution plan notified by the server 10, when the charging / discharging device 28a detects the connection of the battery 30, the charging / discharging device 25a discharges the battery 27a, and the charging / discharging device 28a charges the battery 30 with the surplus power of the first power system 12a (step 310). The operation range of the battery 30 is also set from about 80% to about 10% of the capacity.

[0026] When the charging of the battery 30 is completed, the driver removes the battery 30 from the charging / discharging device 28a, mounts the battery 30 on the automobile 14, and drives the automobile 14 to the installation location of the charging / discharging device 28b of the power system 12b (step 312).

[0027] The driver removes the battery 30 from the automobile 14 and connects the battery 30 to the charging / discharging device 28b (step 314).

[0028] In accordance with the power distribution plan notified by the server 10, when the charging / discharging device 28b detects the connection of the battery 30, the charging / discharging device 28b discharges the battery 30, and the charging / discharging device 25b charges the battery 27b with the discharging power of the battery 30 (step 316).

[0029] The charge / discharge device 25b discharges the storage battery 27b and supplies the discharged power to the power grid 34b (step 318). The discharged power is consumed by the customer 22b. The discharged power of the storage battery 27b may be once charged into the storage battery 67, and the discharged power of the storage battery 67 may be supplied to the power grid 34b.

[0030] Thereby, power is delivered from the power system 12a to the power system 12b, and it is possible to prevent a power shortage from occurring in the power system 12b.

[0031] The server 10 may pay the power selling charge according to the charge amount of the storage battery 30 to the power system 12a, and may charge the power buying charge according to the discharge amount of the storage battery 30 to the power system 12b. The server 10 may pay the power delivery charge according to the difference between the charge amount and the discharge amount to the administrator of the mobile body 14.

[0032] According to the power delivery system and the power delivery method according to the first embodiment, the storage battery 30 charged by the surplus power of the power system 12a at the delivery source is moved by the mobile body 14 to the power system 12b at the delivery destination, and the power of the storage battery 30 is discharged at the power system 12b at the delivery destination and supplied to the customer 22. Although the grid connection lines are connected between the grids, there is a possibility that the grid connection lines are not connected between the microgrids. For this reason, even if the grid connection line 36 is not connected between the power systems 12, power can be transferred between the power systems 12, and the possibility of a power outage due to a power shortage is reduced. Further, even if the grid connection line 36 is connected between the power systems 12, there is a limit to the amount of power that can be delivered by the grid connection line. By passing through the storage battery 30, an amount of power exceeding the capacity of the grid connection line 36 is delivered between the power systems 12. For this reason, the possibility of a power outage due to a power shortage is further reduced.

[0033] Second Embodiment FIG. 4 is a block diagram for explaining an example of a power distribution system according to the second embodiment. The mobile body 14 according to the first embodiment is exclusively used for moving the storage battery 30. In the second embodiment, an EV is used as the mobile body. The EV is not exclusively used for moving the storage battery. The driver of the EV can deliver power while driving the EV and receive a reward. A driver who can deliver power registers with the system in advance. The system determines a driver suitable for power distribution from the registered drivers.

[0034] The power distribution system includes a server 10, a plurality of power grids (microgrid 42, grid 44), and an EV 46. The microgrid 42 and the grid 44 may be connected to each other by a grid connection line 50. The number of power grids 42 and 44 is at least two. The number of EVs 46 may be plural. The EV 46 is equipped with a storage battery 48. If the storage battery 48 of the EV 46 is also used for power distribution, there is no need to load or unload the storage battery on the mobile body. Although FIG. 4 also shows the power grids 42 and 44 separated from each other, the power grids 42 and 44 may be adjacent to each other.

[0035] The power of the storage battery 48 is used for distribution between the power grids 42 and 44 and is also consumed for driving. The driving distance between the microgrids 42 is shorter than the driving distance between the grids 44. The power of the storage battery 48 may be consumed in large amounts when driving between the grids 42, but is not consumed as much when driving between the microgrids 44. Power distribution using the EV 46 is more efficient when implemented between the microgrids 44 than when implemented between the grids 42. When a traveling power supply system is used in combination, a sufficient amount of power can be distributed using the EV 46 even between the grids 42.

[0036] The power grids 42 and 44 are connected to the server 10 by wire or wirelessly. The power grids 42 and 44 may be connected to the server 10 via a network.

[0037] The battery 48 of the EV46 is charged in the power grid of the delivery source (for example, the microgrid 42a). The driver operates the EV46 from the delivery source to the power grid of the delivery destination (for example, the microgrid 42b). The battery 48 of the EV46 is discharged in the microgrid 42b. The discharged power is consumed by the consumers of the microgrid 42b.

[0038] The driver owns a mobile terminal 54. The mobile terminal 54 communicates with the server 10. An example of the mobile terminal 54 is a smartphone.

[0039] FIG. 5 is a diagram for explaining an example of the power grids 42 and 44 according to the second embodiment. The grid 44 is different in scale from the microgrid 42, but is configured in the same manner as the microgrid 42.

[0040] The power grids 42 and 44 include a controller 62, a power generation device 64, consumers 66, a battery system 63, a charge / discharge device 68, a meter 90, a power grid 70, and a grid connection unit 72. The battery system 63 includes a charge / discharge device 65 and a battery 67. The power generation device 64, the consumers 66, and the charge / discharge device 68 may include the battery system 63. The number of independent battery systems 63 individually deployed in the power grids 42 and 44 may be one or more. The number of battery systems 23 deployed in the power generation device 64, the consumers 66, and the charge / discharge device 68 may be one or more. The power grids 42 and 44 only need to include at least one battery system 63. The number of the battery 67 and the charge / discharge device 65 in the battery system 63 may be one or more. Examples of the power generation device 64 are a nuclear power plant, a thermal power plant, a solar cell, and a wind power plant. The power generation device 64, the consumers 66, the battery system 63, and the charge / discharge device 68 are connected to the power grid 70. The power grid 70 is connected to the grid connection line 50 via the grid connection unit 72. The number of the charge / discharge device 68 and the meter 90 may be one or more. The charge / discharge device 68 may include the battery 67, and in that case, includes the charge / discharge device 65 that charges and discharges the battery.

[0041] The controller 62 also functions as an aggregator that purchases electricity (buying electricity) from the customer 66 or sells electricity (selling electricity) to the customer 66 under a prior contract with the customer 66. The controller 62 is connected to the power generation device 64, the customer 66, the battery system 63, the charge / discharge device 68, the EV 46, the smartphone 54, the grid connection unit 72, and the server 10. The controller 62 transmits information to the server 10 and receives information from the server 10.

[0042] The charge / discharge device 65 charges the battery 67 with the surplus power of the power grid 70. The charge / discharge device 65 discharges the battery 67 and supplies the discharged power to the power grid 70. The discharged power is supplied to the customer 66. The battery 67 is a stationary large-scale in-grid battery. An example of the battery 67 is a lithium-ion battery.

[0043] The charge / discharge device 68 of the power distributor charges the battery 48 mounted on the EV 46 with the surplus power of the power grid 70. The charge / discharge device 68 of the power recipient discharges the battery 48. The charge / discharge device 65 charges the battery 67 with the discharged power of the battery 48. The charge / discharge device 65 discharges the battery 67 and supplies the discharged power to the power grid 70. The discharged power of the battery 48 may be supplied to the power grid 70 without passing through the charge / discharge of the battery 67.

[0044] The meter 90 is connected to the charge / discharge device 68. An example of the meter 90 is a specific meter or a special case meter. The meter 90 measures the charge / discharge amount of the battery 48 by the charge / discharge device 68. The measured value is used for billing and payment to the administrators of the power systems 42, 44 and the driver.

[0045] The charge / discharge device 68 may include charge / discharge devices 68-1, 68-2, 68-3 of a plurality of types. The charge / discharge devices 68-1, 68-2 charge the batteries 48-1 of the parked EV 46-1 and the batteries 48-2 of the parked EV 46-2, respectively. The charge / discharge device 68-3 charges the battery 48-3 of the running EV 46-3.

[0046] The charging and discharging device 68-1 is a wired charging and discharging device equipped with a plug 80. The driver of the EV46-1 parks the EV46-1 in the vicinity of the charging and discharging device 68-1. The driver inserts the plug 80 into the port 82 of the EV46-1. The storage battery 48-1 is electrically connected to the charging and discharging device 68-1 via the port 82 and the plug 80.

[0047] The charging and discharging device 68-2 is a charging and discharging device of an electromagnetic induction method or a magnetic field resonance method equipped with a transmitting and receiving coil 84. The transmitting and receiving coil 84 is installed on the ground surface. The EV46-2 is equipped with a transmitting and receiving coil 86. The driver of the EV46-2 parks the EV46-2 on the transmitting and receiving coil 84. Electric power is transmitted between the transmitting and receiving coils 84 and 86 by electromagnetic induction or magnetic field resonance.

[0048] The charging and discharging device 68-3 charges the storage battery 48-3 of the EV46-3 during driving. Examples of the charging and discharging device 68-3 are a contact type charging and discharging device equipped with an overhead wire, a contact type charging and discharging device equipped with a ground surface slot, or a non-contact type charging and discharging device equipped with a wireless section. The overhead wire is installed on the road within or between the power systems 42 and 44. The EV46-3 may be equipped with a pantograph that contacts the overhead wire. The ground surface slot is installed on the surface of the road within or between the power systems 42 and 44. The EV46-3 may be equipped with a contact point that contacts the ground surface slot. The wireless section is installed along the road within or between the power systems 42 and 44. The wireless section transmits power by radio waves, for example, microwaves. The EV46-3 may be equipped with a receiving section that receives the power transmitted from the wireless section. The charging and discharging device 68-3 charges and discharges the EV46-3 during driving for power distribution.

[0049] There is no limitation on the charging and discharging method of the storage battery, and other methods can also be freely used.

[0050] FIG. 6 is a block diagram for explaining an example of the controller 62 according to the second embodiment.

[0051] The controller 62 includes a CPU 102, a memory 104, an input device 108, a display device 110, a power supply and demand interface circuit (power supply and demand I / F circuit) 112, a charge and discharge interface circuit (charge and discharge I / F circuit) 114, a communication circuit 116, and a wireless communication circuit 118. The CPU 102, the memory 104, the input device 108, the display device 110, the power supply and demand I / F circuit 112, the charge and discharge I / F circuit 114, the communication circuit 116, and the wireless communication circuit 118 are connected to each other via a bus line 120.

[0052] The memory 104 stores a program related to the control of the charge and discharge devices 68 and 65 (referred to as a charge and discharge program) 106 and a program related to aggregation. The CPU 102 executes the charge and discharge program 106 to control the charge and discharge devices 68 and 65. The memory 104 also stores the data during the processing of the CPU 102. The memory 104 is capable of storing programs and data even when the power is off.

[0053] The input device 108 includes, for example, a keyboard or a touch panel. The input device 108 inputs data necessary for charge and discharge control and the like.

[0054] The display device 110 includes, for example, an LCD (Liquid Crystal Display). The display device 110 displays the results of charge and discharge control and the like.

[0055] The power supply and demand I / F circuit 112 is connected to the power generation device 64 and the consumer 66. The CPU 102 receives the power supply status by the power generation device 64 and the power demand status by the consumer 66 via the power supply and demand I / F circuit 112. The CPU 102 transmits a control signal related to power generation and a request signal related to demand to the power generation device 64 and the consumer 66 via the power supply and demand I / F circuit 112.

[0056] The charge and discharge I / F circuit 114 is connected to the charge and discharge devices 65 and 68. The CPU 102 receives the capacity and the remaining power of the storage battery 67 via the charge and discharge I / F circuit 114. The CPU 102 transmits a charge instruction for the storage battery 67 by the surplus power of the power grid 70 to the charge and discharge device 68 via the charge and discharge I / F circuit 114.

[0057] The wireless communication circuit 118 is wirelessly connected to the EV46 or the smartphone 54. The CPU 102 receives EV information from the EV46 and a travel plan from the smartphone 54 via the wireless communication circuit 118. The CPU 1024 transmits a power distribution plan to the EV46 and the smartphone 54 via the wireless communication circuit 118.

[0058] FIG. 7 is a diagram for explaining an example of EV information and a travel plan according to the second embodiment. The EV information (FIG. 7(a)) includes identification information of the EV46, current values of the EV46, and the capacity, remaining amount, and chargeable power of the storage battery 48. The chargeable power is within the operating capacity range of the storage battery 48, for example, from 10% to 80%. The travel plan of the EV46 (FIG. 7(b)) includes identification information of the plan, a departure point, a scheduled departure date and time, a transit point, an arrival point, and a scheduled arrival date and time. The EV46 transmits the EV information to the server 10.

[0059] A driver capable of power distribution registers with the server 10 using the smartphone 54. The driver creates a travel plan for the EV using the smartphone 54. The travel plan includes a plan to use the EV46 daily or a travel plan. A driver who desires power distribution may create a plan to travel at any time and to any place. The travel plan is transmitted from the smartphone 54 to the server 10 via the EV46 and the controller 62.

[0060] Returning to the description of FIG. 6, the communication circuit 116 communicates with the server 10. The CPU 102 transmits the power supply amount, which is the sum of the generated power of the power generation device 64, the power supplied to the power systems 42 and 44 via the grid connection line 50, and the remaining power of the storage battery 67, the demand amount of the consumer 66, and the EV information to the server 10 via the communication circuit 116.

[0061] Server 10 obtains a demand prediction amount based on the history of demand, determines a power grid (power supply source) where the power supply amount is equal to or greater than the demand prediction amount and there is likely to be excess power, and a power grid (power destination) where the power supply amount is less than the demand prediction amount and there is likely to be a power shortage, and determines an EV 46 suitable for power distribution based on the EV information and driving plan. Server 10 transmits the determined information to controller 62 as a power distribution plan.

[0062] FIG. 8 is a diagram for explaining an example of a power distribution plan according to the second embodiment. The power distribution plan includes identification information of the plan, the power grid of the power supply source, the installation location of its charging and discharging device, the power grid of the power destination, the installation location of its charging and discharging device, the power distribution amount, the start deadline of distribution, the completion deadline of distribution, and the identification information of the EV. The power distribution amount is the difference between the charging power of the battery 48 of the EV 46 at the power supply source and the discharging power of the battery 48 of the EV 46 at the power destination.

[0063] FIG. 9 is a block diagram for explaining an example of server 10 according to the second embodiment. Server 10 includes a CPU 132, a memory 134, an input device 138, a display device 140, a communication circuit 142, and a wireless communication circuit 144. The CPU 132, the memory 134, the input device 138, the display device 140, the communication circuit 142, and the wireless communication circuit 144 are connected to each other via a bus line 146.

[0064] Memory 134 stores a program (referred to as a power distribution program) 136 for controlling power distribution between power grids 42 and 44 and a power distribution plan 148 (FIG. 8). CPU 132 executes power distribution program 136 to control power distribution between power grids 42 and 44. Memory 134 also stores data during the processing of CPU 132. Memory 134 is capable of storing programs and data even when the power is turned off.

[0065] Input device 138 consists of an input device such as a keyboard or a touch panel. Input device 138 is used when inputting data necessary for power distribution.

[0066] The display device 140 is composed of a display device such as an LCD. The display device 140 is used when displaying the results of power distribution and the like.

[0067] The communication circuit 142 communicates with the controller 62. The wireless communication circuit 144 communicates wirelessly with the EV 46, the smartphone 54 of the driver of the EV 46, and the administrator terminal of the power systems 42 and 44.

[0068] FIG. 10 is a block diagram for explaining an example of the electrical configuration of the EV 46 according to the second embodiment. An example of the electric circuit of the EV 46 includes a CPU 152, a memory 154, a wireless communication circuit 156, a charge / discharge I / F circuit 158, an input device 160, and a display device 162. The CPU 152, the memory 154, the wireless communication circuit 156, the charge / discharge I / F circuit 158, the input device 160, and the display device 162 are connected to each other via a bus line 164.

[0069] The memory 154 stores a program (referred to as a distribution support program) 172 for assisting power distribution between the power systems 42 and 44, EV information 174 (FIG. 7(a)), and a travel plan 176 (FIG. 7(b)).

[0070] The CPU 152 executes the distribution support program 172 and causes the display device 162 to display support information. The support information includes information indicating the power supply source and the power supply destination. The CPU 152 transmits the EV information 174 to the controller 62 via the wireless communication circuit 156.

[0071] The charge / discharge I / F circuit 158 electrically connects the in-vehicle battery 48 to the charging / discharging device 68.

[0072] The input device 160 is composed of, for example, a keyboard or a touch panel. The input device 160 inputs data and the like necessary for assisting power distribution.

[0073] The display device 162 is composed of a display device such as an LCD. The display device 162 displays EV information, support information, and the like.

[0074] The wireless communication circuit 156 communicates with the server 10 (wireless communication circuit 144), the controller 62 (wireless communication circuit 118), and the smartphone 54.

[0075] An example operation of the power distribution system according to the second embodiment will be described. FIG. 11 is a flowchart for explaining an example of the operation before the start of power distribution of the EV 46 according to the second embodiment. When the driver has a driving schedule for the EV 46, the driver creates a driving plan 176 using the smartphone 54 and transmits the driving plan 176 to the EV 46. The driving plan 176 is stored in the memory 154.

[0076] When the CPU 152 executes the delivery support program 172, the CPU 152 generates EV information 174 (FIG. 7(a)) including the current value of the EV 46, the capacity of the battery 48, and the remaining amount, and writes the EV information 174 into the memory 154 (step 402).

[0077] The CPU 152 transmits the EV information 174 to the controller 62 via the wireless communication circuit 156 (step 404).

[0078] The CPU 152 determines whether the driving plan 176 (FIG. 7(b)) is stored in the memory 154 (step 406).

[0079] When the driving plan is not stored in the memory 154 (No in step 406), the CPU 152 executes the process of step 402. When the driving plan is stored in the memory 154 (Yes in step 406), the CPU 152 transmits the driving plan 176 to the controller 62 via the wireless communication circuit 156 (step 408).

[0080] The CPU 152 determines whether it has received the power distribution plan from the server 10 (step 410). If it has not received the power distribution plan (No in step 410), the CPU 152 executes the process of step 402. If it has received the power distribution plan (Yes in step 410), the CPU 152 displays the power distribution plan on the display device 162 (step 412). The server 10 also transmits the power distribution plan to the driver's smartphone 54 of the EV 46. The power distribution plan is also displayed on the display device of the smartphone 54.

[0081] The driver recognizes the power distribution plan displayed on the display device of the EV 46 or the smartphone 54, and drives the EV 46 to the charge / discharge device 68 of the power supply system at the power supply source.

[0082] The subsequent power distribution process will be described later with reference to FIG. 16.

[0083] FIG. 12 is a flowchart for explaining an example of the operation before starting power distribution of the controller 62 of the power systems 42 and 44 according to the second embodiment. When the CPU 102 executes the charge / discharge program 106, it obtains the demand prediction amount from the history of the demand amount of the customer 66, and obtains the supply amount from the power generation amount of the power generation device 64 and the remaining power amount of the storage battery 67 (step 452).

[0084] The CPU 102 determines whether the supply amount is equal to or greater than the demand prediction amount (step 454). If the supply amount is equal to or greater than the demand prediction amount (Yes in step 454), the CPU 102 transmits a power surplus prediction indicating that there is likely to be excess power to the server 10 (step 456). The CPU 102 instructs the charge / discharge device 65 to charge the storage battery 67 with the excess power (step 458). The charge / discharge device 65 charges the storage battery 67 (step 460). When the charging of the storage battery 67 is completed, the CPU 102 transmits a charging completion notification to the server 10 (step 461). If the supply amount is less than the demand prediction amount (No in step 454), the CPU 102 transmits a power shortage prediction indicating that there is likely to be a power shortage to the server 10 (step 462).

[0085] After step 460 or step 462, the CPU 102 determines whether the power charging / discharging device 68 has detected the connection of the storage battery 48 (step 464). If the connection of the storage battery 48 is not detected (No in step 464), the CPU 102 executes step 452. If the connection of the storage battery 48 is detected (Yes in step 464), the CPU 102 starts power distribution (step 466).

[0086] The power distribution process will be described later with reference to FIG. 16.

[0087] FIG. 13 is a flowchart for explaining an example of the operation before starting power distribution of the server 10 according to the second embodiment. When the CPU 132 executes the power distribution program 136, it receives power surplus prediction and power shortage prediction from all the power systems 42, 44 (step 502). The CPU 132 receives EV information and a travel plan from all the EVs 46 (step 504).

[0088] The CPU 132 creates a power distribution plan (FIG. 8) from the power system that is likely to have excess power to the power system that is likely to have insufficient power (step 506). Specifically, the CPU 132 determines which charging / discharging device of which power system (distribution source) will deliver how much power (kilowatt-hours) to which charging / discharging device of which power system (destination) using which EV, when to start the delivery, and when to complete the delivery.

[0089] The EVs used for power distribution are EVs with a large capacity of the storage battery 48, EVs with a large remaining amount of the storage battery 48, EVs whose current location is close to the installation location of the charging / discharging device 68 of the distribution source, EVs with a travel plan to go to the destination or its vicinity, and EVs with a travel plan to pass through the destination or its vicinity. When using the storage battery 48 of the EV 46 for power distribution, it is necessary to consider the travel distance or travel time.

[0090] Since the EV46 runs using the power of the battery 48, when the driving distance or driving time increases, the amount of power delivered decreases. FIG. 14 is a diagram for explaining an example of the transition of the remaining amount of the battery 48 of the EV46 according to the second embodiment. Assume that the capacity of the battery 48 is 50 kWh, and the operating range actually used is 10 to 40 kWh. FIG. 14 shows the transition of the remaining amount (kWh) of the battery 48 when traveling for 30 minutes, 2 hours, and 4 hours with an initial remaining amount of 15 kWh before the start of power distribution (driving), a charging power of 50 kW @ 30 minutes (charging power amount 25 kWh), a speed of 60 km / h, an electricity cost of 10 km / kW, and a discharging power of 50 kW @ 30 minutes (discharging power amount 25 kWh). The charging power is the instantaneous power for charging the battery 48. When charging for 1 hour with a charging power of 50 kW, 50 kWh of electric power is charged into the battery 48. When charging for 30 minutes, half of 25 kWh of electric power is charged. The discharging power is the instantaneous power for discharging the battery 48. When discharging for 1 hour with a discharging power of 50 kW, 50 kWh of electric power is discharged from the battery 48. When discharging for 30 minutes, half of 25 kWh of electric power is discharged. Under this condition, immediately after traveling for 30 minutes (characteristic a), the same amount of power as the charging power amount can be discharged. As the driving time / driving distance increases (characteristics b, c), due to the minimum value of the remaining battery power, the amount of discharged power decreases compared to the amount of charged power. On the other hand, if a power supply system during driving is adopted to supply power to the EV46 during driving to compensate for the power consumption during driving (characteristic d), the same amount of power as the charging power amount can be discharged.

[0091] Even when a power supply system during driving is not adopted, if there is another power system on the driving route between the power supply source and the delivery destination and the EV46 is recharged by the other power system, the power consumption during driving can be compensated.

[0092] FIG. 15 shows the transition of the remaining amount (kWh) of the battery 48 when the initial remaining amount is 35 kWh and the other conditions are the same as those in FIG. 14. Under this condition, since the upper limit of the operating capacity range of the battery 48 is set to 40 kWh, when the initial remaining amount is 35 kWh, only 5 kWh of the difference is charged, and the charging power amount becomes less. However, it is also possible to discharge the power other than the power charged as the delivery power (the initial remaining battery power) as surplus power.

[0093] Thus, when using EV46, to increase the power delivery amount, it is preferable that the in-vehicle battery has a large capacity, the power consumption during driving is small (or the remaining power of the battery does not decrease due to driving), and a battery is selected in which the difference between the upper limit of the operation capacity range at the delivery destination and the remaining power of the battery at that time is large. Reducing the power consumption during driving is due to high electricity costs, the implementation of an in-driving power supply system as a charge-discharge system, a short driving distance (distance between systems), etc.

[0094] Server 10 plans the power delivery between power systems from the prediction of the excess and shortage power of each power system, plans the EV delivery of the power amount exceeding the allowable power transmission of the system connection line 50, and determines the power delivery EV from the remaining amount of the in-vehicle battery power of the registered EV and the predicted value of the power consumption during driving between power systems.

[0095] Returning to the description of FIG. 13, CPU 132 transmits the power delivery plan to the EV used for delivery (step 508). CPU 132 also transmits the power delivery plan to the smartphone 54 of the driver of EV46.

[0096] CPU 132 determines whether it has received a charging completion notification of the battery 67 from the power systems 42 and 44 (step 510). If it has not received the charging completion notification of the battery 67 (No in step 510), CPU 132 executes step 502. If it has received the charging completion notification of the battery 67 (Yes in step 510), CPU 132 starts the power delivery (step 512).

[0097] The power delivery process will be described later with reference to FIG. 16.

[0098] FIG. 16 is a sequence diagram of the power supply system at the delivery source, the power supply system at the delivery destination, and the server 10 for explaining an example of the power delivery method according to the second embodiment.

[0099] Power distribution starts when the driver of EV46 drives the EV46 to the installation location of the charge and discharge device 68 of the power distribution source power system (e.g., microgrid 42a) according to the power distribution plan, and connects the battery 48 to the charge and discharge device 68.

[0100] The CPU 102 of the power distribution source power system determines whether the charge and discharge device 68 has detected the connection of the battery 48 of the EV46 (step 602). Step 602 corresponds to step 464 in FIG. 12. The charge and discharge device 68-1 detects the attachment to the port 82 of the plug 80. The charge and discharge device 68-2 detects the conduction between the transmission and reception coil 84 and the transmission and reception coil 86. The charge and discharge device 68-3 detects the approach of the EV46-3 or the contact with the overhead line. If the connection of the battery 48 of the EV46 is not detected (No in step 602), the CPU 102 repeatedly executes step 602.

[0101] If the connection of the battery 48 of the EV46 is detected (Yes in step 602), the CPU 102 operates the charge and discharge device 65 and the charge and discharge device 68. The charge and discharge device 65 discharges the battery 67, and the charge and discharge device 68 charges the battery 48 with the surplus power of the power distribution source power system (step 604). The amount of surplus power used for charging is instructed from the server 10. The amount of charging power is less than or equal to the amount of surplus power. The amount of surplus power is the predicted amount of power supplied by the system tie line 50 + the predicted amount of power generated by the power generation device 64 + the predicted amount of discharge power of the battery 67 - the predicted demand. When the charging of the battery 48 is completed, the CPU 102 receives the charging amount from the meter 90, and transmits the charging completion notification and the charging amount to the server 10 (step 606).

[0102] The CPU 132 of the server 10 transmits the charging completion notification to the smartphone 54 of the driver of the EV46 (step 802). The CPU 132 writes the charging amount into the memory 134 (step 804). The CPU 132 pays the selling electricity fee (distribution power fee) corresponding to the charging amount to the administrator of the power distribution source power system (step 804).

[0103] When the driver receives the charging completion notification, the driver removes the EV46 from the charging and discharging device 68. The driver drives the EV46 to the installation location of the charging and discharging device 68 of the destination power system (for example, the microgrid 42b). The driver connects the storage battery 48 to the charging and discharging device 68.

[0104] The CPU 102 of the destination power system determines whether the charging and discharging device 68 has detected the connection of the storage battery 48 of the EV46 (step 702). If the connection of the storage battery 48 of the EV46 is not detected (No in step 702), the CPU 102 repeatedly executes step 702.

[0105] When the connection of the storage battery 48 of the EV46 is detected (Yes in step 702), the CPU 102 operates the charging and discharging device 65 and the charging and discharging device 68. The charging and discharging device 68 discharges the storage battery 48, and the charging and discharging device 65 charges the storage battery 67 with the discharged power (step 704). The discharge amount of the storage battery 48 is instructed from the server 10.

[0106] When the discharge of the storage battery 48 is completed, the CPU 102 receives the discharge amount from the meter 90, and transmits the discharge completion notification and the discharge amount to the server 10 (step 706). The charging and discharging device 68 discharges the storage battery 67, and supplies the discharged power to the power grid 70 (step 708).

[0107] The CPU 132 of the server 10 transmits the discharge completion notification to the smartphone 54 of the driver of the EV46 (step 812). The CPU 132 reads the charge amount from the memory 134, calculates the charging fee according to the charge amount and the discharging fee according to the discharge amount, and pays the power distribution fee, which is the difference (discharging fee - charging fee), to the driver of the EV46 (step 814). The unit price of discharging is higher than the unit price of charging. The CPU 132 charges the administrator of the destination power system with the power purchase fee (distribution power fee) according to the discharge amount (step 816). The power purchase unit price is higher than the power selling unit price. The power purchase fee - the power selling fee becomes the profit of the server 10. A part of it may also be the profit of the driver of the EV46.

[0108] Note that since the forwarding charge included in the electricity bill is not included in the electricity distribution charge, the electricity purchase charge (distribution electricity charge) borne by the delivery destination can be set to be equal to or less than the amount obtained by subtracting the forwarding charge from the electricity trading price. Therefore, the electricity distribution charge can be set to be equal to or more than the forwarding charge, which serves as an incentive for the driver of the EV46 to distribute electricity.

[0109] According to the power distribution system and the power distribution method according to the second embodiment, the EV46 equipped with the storage battery 48 charged in the power system 12a of the distribution source is driven to the power system 12b of the delivery destination, and the power of the storage battery 48 is discharged in the power system 12b of the delivery destination. Therefore, the same operational effects as those of the first embodiment can be obtained. Furthermore, since the EV46 is used as the moving body 14 and the storage battery 30 of the first embodiment, the labor of loading and unloading the storage battery onto and from the moving body can be saved. Furthermore, the driver can distribute electricity following his or her planned driving and receive the distribution charge. This also leads to the popularization of EVs.

[0110] FIGS. 17, 18, and 19 are block diagrams for explaining an example of a power distribution system according to a modification of the second embodiment. In the second embodiment, one EV46 travels along the distribution route from the distribution source to the delivery destination. However, the distribution route may be divided into at least two sections, and a plurality of EVs may travel through each section to relay and distribute the electricity with at least two EVs.

[0111] For example, assume that the distribution source is the power system 42a (FIG. 17) and the delivery destination is the power system 42b (FIG. 19). Suppose that the server 10 cannot find an EV traveling from the power system 42 to the power system 42b, but can find an EV traveling from the power system 42a to the power system 42c (FIG. 18) and an EV traveling from the power system 42c to the power system 42b. The number of relay power systems 42c located between the distribution source and the delivery destination is not limited to 1 and may be 2 or more.

[0112] Server 10 divides the delivery plan from power grid 42a to power grid 42b into a first plan from power grid 42a to power grid 42c and a second plan from power grid 42c to power grid 42c. Server 10 notifies the driver of EV46a of the first plan and notifies the driver of EV46b of the second plan. The driver of EV46a drives EV46a to the location where the charging and discharging device 68a of power grid 42a is installed. The driver of EV46b drives EV46b to the location where the charging and discharging device 68c of power grid 42c is installed.

[0113] At the power grid 42a of the delivery source, when EV46a arrives at the location where the charging and discharging device 68a is installed, the charging and discharging device 65a discharges the storage battery 67a, and the charging and discharging device 68a charges the storage battery 48a of EV46a with the surplus power of the power grid 42a. After charging, the driver of EV46a drives EV46a to the location where the charging and discharging device 68c of power grid 42c is installed.

[0114] At the relay power grid 42c, when EV46a arrives at the location where the charging and discharging device 68c is installed, the charging and discharging device 68c discharges the storage battery 48a, and the charging and discharging device 65c charges the storage battery 67c with the surplus power of the power grid 42c.

[0115] After charging, when EV46b arrives at the location where the charging and discharging device 68c is installed, the charging and discharging device 65c discharges the storage battery 67c, and the charging and discharging device 68c charges the storage battery 48b of EV46b with the surplus power of the power grid 42c. After charging, the driver of EV46b drives EV46b to the location where the charging and discharging device 68b of power grid 42b is installed.

[0116] At the power grid 42b of the delivery destination, when EV46b arrives at the location where the charging and discharging device 68b is installed, the charging and discharging device 68b discharges the storage battery 48b, and the charging and discharging device 65b charges the storage battery 67b with the discharge power of the storage battery 48b. After charging, EV46b may leave the charging and discharging device 68b. The charging and discharging device 65b discharges the storage battery 67b and supplies the discharge power of the storage battery 67b to the power grid 42b.

[0117] According to the power distribution system and power distribution method according to the modified example of the second embodiment, even if one EV46 traveling on the distribution route from the distribution source to the distribution destination cannot be found, the distribution route can be divided into at least two, and a plurality of EVs travel through each section, and the power can be relayed and distributed by at least two EVs.

[0118] The charging and discharging control, charging, and payment to the power systems 42 and 44 and the driver have been described as cloud services by the server 10. However, during charging and discharging, it may also be a P2P (peer-to-peer) transaction between the charging and discharging device 68 and the EV46 or between EV46s.

[0119] Third Embodiment FIGS. 20 and 21 are block diagrams for explaining an example of the power distribution system according to the third embodiment. The moving body 900 according to the third embodiment can move the EV46. Examples of the moving body 900 are a truck, a trailer, a freight train, a cargo ship, and a cargo plane. The power system 42 includes the terminal 898 of the moving body 900.

[0120] In the power system 42a of the distribution source (FIG. 20), the charging and discharging device 65a discharges the storage battery 67a, and the charging and discharging device 68a charges the storage battery 48 with the surplus power of the power system 42a. The driver in the power system 42a drives the EV46 to the terminal 898a. At the terminal 898a, the EV46 is mounted on the moving body 900. The moving body 900 moves the EV46 to the terminal 898b of the power system 42b (FIG. 21) at the distribution destination.

[0121] At the terminal 898b, the EV46 is unloaded from the moving body 900. The driver in the power system 42b drives the EV46 to the charging and discharging device 68b. The charging and discharging device 68b discharges the storage battery 48, and the charging and discharging device 65b charges the storage battery 67b with the discharged power. The charging and discharging device 65b discharges the storage battery 67b and supplies the discharged power to the power system 42b.

[0122] According to the power distribution system and the power distribution method according to the third embodiment, the EV46 travels only between the charging and discharging device 68 in the power grid 42 and the terminal 898. Between the power grids 42, the EV46 does not travel and is moved by the moving body 900. The power of the storage battery 48 of the EV46 is not consumed during the movement between the grids. Therefore, even if the EV46 is used for power distribution between grids in remote areas, the distribution power consumed for traveling is small. It is possible to perform power distribution using the EV46 even between grids.

[0123] Fourth Embodiment FIG. 22 and FIG. 23 are block diagrams for explaining an example of a power supply grid of a power distribution system according to the fourth embodiment.

[0124] The power supply grid 42a of the power supply source includes a plurality of power generation devices 64A-1 to 64A-n, a plurality of consumers 66A-1 to 66A-n, a plurality of battery systems 63a-1 to 63a-n, a plurality of charging and discharging devices 68A-1 to 68A-n, and a charging and discharging device 901. The battery systems 63a-1 to 63a-n each include charging and discharging devices 65a-1 to 65a-n and storage batteries 67a-1 to 67a-n. The power generation device 64A, the consumer 66A, and the charging and discharging device 68A may include the battery system 63a. The charging and discharging device 65a charges the storage battery 67a with the surplus power of the power grid 42a. When the EV46A-1 to EV46A-n arrive at the installation locations of the charging and discharging devices 68A-1 to 68A-n, the charging and discharging device 65a discharges the storage battery 67a, and the charging and discharging devices 68A-1 to 68A-n charge the storage batteries 48A-1 to 48A-n with the surplus power of the power grid 42a, respectively. After charging, the drivers of the EV46A-1 to EV46A-n drive the EV46A-1 to EV46A-n to the charging and discharging device 901, respectively.

[0125] When the storage batteries 48A-1 to 48A-n of the EV46A-1 to EV46A-n are connected, the charging and discharging device 901 discharges the storage batteries 48A-1 to 48A-n. The charging and discharging device 901 charges the storage battery 903 with the discharge power of the storage batteries 48A-1 to 48A-n. The charging and discharging device 901 discharges the storage battery 903 and charges the storage battery 902 with the discharge power of the storage battery 903.

[0126] Each of the storage batteries 903 and 902 is a large-capacity storage battery capable of storing the total amount of power of the storage batteries 48A-1 to 48A-n of a plurality of EVs 46A-1 to 46A-n. Examples of the storage batteries 903 and 902 are lithium-ion batteries. An example of the shape of the storage battery 902 is a container shape. The storage battery 902 is moved between the power systems 42 by the moving body 904. Examples of the moving body 904 are a truck, a trailer, a freight train, a cargo ship, and an aircraft. The charge / discharge device 901 is arranged at the terminal of the moving body 904. At the terminal, the storage battery 902 is loaded onto the moving body 940.

[0127] The means for moving the storage batteries 48A-1 to 48A-n from the charge / discharge devices 68A-1 to 68A-n to the charge / discharge device 901 is not limited to the EVs 46A-1 to 46A-n. As the moving means, a motor vehicle equipped with an engine or the like may be used.

[0128] FIG. 24 is a block diagram for explaining an example of the power system at the delivery destination of the power distribution system according to the fourth embodiment. The power system 42b1 at the delivery destination includes a charge / discharge device 905. The charge / discharge device 905 is arranged at the terminal of the moving body 904. The charge / discharge device 905 is connected to the power grid 70. At the terminal, the storage battery 902 is unloaded from the moving body 904. When the storage battery 902 is connected, the charge / discharge device 905 discharges the storage battery 902 and charges the storage battery 907 with the discharge power. The charge / discharge device 905 discharges the storage battery 907 and supplies the discharge power to the power grid 70. The storage battery 907 is a storage battery having a capacity substantially equal to that of the storage battery 902. An example of the storage battery 907 is a lithium-ion battery.

[0129] According to the power distribution system and the power distribution method according to the fourth embodiment, since the power of a plurality of storage batteries 48 is collected and stored in one storage battery 902, a large amount of power can be distributed between the power systems by one movement of one storage battery 902.

[0130] FIG. 25 and FIG. 26 are block diagrams for explaining another example of the power distribution system of the delivery destination according to the fourth embodiment. The power distribution system 42b2 of the delivery destination includes a plurality of power generation devices 64B-1 to 64B-m, a plurality of consumers 66B-1 to 66B-m, a plurality of battery systems 63b-1 to 63b-m, a plurality of charge / discharge devices 68B-1 to 68B-m, and a charge / discharge device 901b. The battery systems 63b-m to 63b-m each include a charge / discharge device 65b-1 to 65b-m. The power generation device 64B, the consumer 66B, and the charge / discharge device 68B may include a battery system 63b. The charge / discharge device 901b is arranged at the terminal of the moving body 904. At the terminal, the battery 902 is unloaded from the moving body 940. When the battery 902 is connected, the charge / discharge device 901b discharges the battery 902 and charges the battery 903b with the discharge power.

[0131] When the batteries 48B-1 to 48B-m of the EVs 46B-1 to 46B-m are connected, the charge / discharge device 901b discharges the battery 903b. The charge / discharge device 901b charges the batteries 48B-1 to 48B-m respectively with a part of the discharge power of the battery 903b. After charging, the drivers of the EVs 46B-1 to EVs 46B-m drive the EVs 46B-1 to 46B-m to the charge / discharge devices 68B-1 to 68B-m respectively.

[0132] When the batteries 48B-1 to 48B-m of the EVs 46B-1 to 46B-m arrive, the charge / discharge devices 68B-1 to 68B-m discharge the batteries 48B-1 to 48B-m respectively, and the charge / discharge device 65b charges the battery 67b with the discharge power of the battery 48B. The charge / discharge device 65b discharges the battery 67b and supplies the discharge power to the power distribution system 42b2.

[0133] The processing methods of the server 10, the controller 62, and the EV 46 have been described as being implemented software-wise by the CPU, but may also be implemented by a plurality of hardware blocks that realize each functional block. For example, these processing methods may be implemented by one or more circuits such as ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array), or an electronic circuit including these circuits. Also, instead of including one CPU, a plurality of CPUs that respectively realize at least a part of the plurality of functional blocks may be provided.

[0134] Note that the present invention is not limited to the above-described embodiments as they are, and at the implementation stage, the components can be modified and embodied without departing from the gist thereof. Also, various inventions can be formed by appropriately combining the plurality of components disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiments. Furthermore, components from different embodiments may be appropriately combined.

Explanation of Reference Numerals

[0135] 10… Server, 12… Power system, 14… Moving body, 20… Power generation device, 22… Consumer, 25, 28… Charge / discharge device, 27, 30… Storage battery, 32… Controller

Claims

1. A plurality of first storage batteries respectively deployed in each of a plurality of power systems, A plurality of first charge-discharge devices for charging and discharging each of the plurality of first storage batteries, A movable second storage battery, and A plurality of second charge-discharge devices respectively deployed in each of the plurality of power systems for charging and discharging the second storage battery, A moving device for moving the second storage battery from a first power system to a second power system among the plurality of power systems, comprising: The first charge-discharge device of the first power system charges the first storage battery with power in which the supply power of the first power system exceeds the demand power, The second charge-discharge device of the first power system charges the second storage battery with power in which the supply power of the first power system exceeds the demand power, The second charge-discharge device of the second power system discharges the second storage battery and supplies the discharge power of the second storage battery to the second power system. A power distribution system.

2. The second charge-discharge device of the second power system discharges the second storage battery, and the first charge-discharge device of the second power system charges the first storage battery of the second power system with the discharge power of the second storage battery, and supplies the discharge power of the first storage battery to the second power system. The power distribution system according to claim 1.

3. Each of the plurality of first charge-discharge devices charges each of the plurality of first storage batteries with the power of the power system according to the power supply amount and power demand amount of each of the plurality of power systems. The power distribution system according to claim 1.

4. Further comprising a server connected to the plurality of power systems, The server, Determines the first power system and the second power system according to the power supply amount and power demand amount of each of the plurality of power systems, Transmits information regarding the installation location of the second charge-discharge device of the first power system and the installation location of the second charge-discharge device of the second power system to the administrator of the moving device. The power distribution system according to claim 1.

5. The moving device comprises a plurality of electric vehicles each having a plurality of second storage batteries, The server, Determines a first electric vehicle among the plurality of electric vehicles according to the remaining power and chargeable power of the second storage battery of each of the plurality of electric vehicles and the driving plan of each of the plurality of electric vehicles, Transmits information regarding the installation location of the second charge-discharge device of the first power system and the installation location of the second charge-discharge device of the second power system to the administrator of the first electric vehicle. The power distribution system according to claim 4.

6. further comprising a server connected to the plurality of power systems, wherein the server pays a charging fee corresponding to the charging amount of the second storage battery by the second charge / discharge device of the first power system to the administrator of the first power system. The power distribution system according to claim 1.

7. further comprising a server connected to the plurality of power systems, wherein the server charges a discharge fee corresponding to the discharge amount of the second storage battery by the second charge / discharge device of the second power system to the administrator of the second power system. The power distribution system according to claim 1.

8. further comprising a server connected to the plurality of power systems, wherein the server pays a distribution fee corresponding to the difference between the charging amount of the second storage battery by the second charge / discharge device of the first power system and the discharge amount of the second storage battery by the second charge / discharge device of the second power system to the administrator of the mobile device. The power distribution system according to claim 1.

9. The mobile device comprises a first moving body that moves a first second storage battery from the first power system to the third power system, and a second moving body that moves a second second storage battery from the third power system to the second power system, and the second charge / discharge device of the third power system moves the power of the first second storage battery to the second second storage battery. The power distribution system according to claim 1.

10. The mobile device comprises an electric vehicle including the second storage battery and a moving body that moves the electric vehicle, the electric vehicle moves from the second charge / discharge device of the first power system to the terminal of the first power system, the moving body moves the electric vehicle from the terminal of the first power system to the terminal of the second power system, and the electric vehicle moves from the terminal of the second power system to the second charge / discharge device of the second power system. The power distribution system according to claim 1.

11. The first power system includes a third charge / discharge device, a plurality of first storage batteries, and a plurality of second charge / discharge devices, the mobile device comprises a moving body and a plurality of electric vehicles, each of the plurality of second charge / discharge devices of the first power system charges the in-vehicle storage battery of the plurality of electric vehicles, each of the plurality of electric vehicles moves from each of the plurality of second charge / discharge devices to the third charge / discharge device, and the third charge / discharge device discharges the in-vehicle storage battery of each of the plurality of electric vehicles and charges a third storage battery with the discharge power of the in-vehicle storage battery. The mobile body moves the third storage battery to the second power system. The power distribution system according to claim 1.

12. The first charge / discharge device and the second charge / discharge device are each constituted by a different device. The power distribution system according to any one of claims 1 to 11.

13. The first charge / discharge device and the second charge / discharge device are constituted by a common device. The power distribution system according to any one of claims 1 to 11.

14. A first generator deployed in the first power system, A second generator deployed in the second power system, further comprising: The first generator and the second generator generate renewable energy. The power distribution system according to any one of claims 1 to 11.

15. A power distribution method of charging a storage battery with the power of a first power system, moving the storage battery to a second power system, discharging the storage battery, and supplying the discharge power of the storage battery to the second power system.

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