JP2019129690A - Electric power system, electric power unit, and method for controlling electric power system - Google Patents

Abstract

A power system, a power device, and a utility of the power system are improved. An electric power system (1) includes a first electric power device (30a) and a second electric power device (30b) capable of transmitting or receiving electric power to and from a moving body capable of storing electric power, and power feeding to the moving body by the electric power unit. And a control device 40 for controlling power reception, wherein the control device 40 is connected to the first mobile device EV1 that performs discharging so that the first power device 30a can receive power, and the second mobile device that performs charging. When the second power device 30b is connected to the EV2 such that power can be transmitted, the first power device 30a supplies the DC power received from the first mobile body EV1 to the second mobile body EV2. Control. [Selection diagram] Figure 2

Description

  The present invention relates to a power system, a power device, and a control method of the power system.

  2. Description of the Related Art Conventionally, an electric power system using an apparatus that supplies and receives electric power with an electric vehicle is known. For example, Patent Document 1 discloses an electric power system that performs power supply or power reception in a state where an electric vehicle is connected to a house through a charge / discharge device for an electric vehicle.

Japanese Patent Laid-Open No. 2006-5388

  Power systems have room for further improvement.

  The present disclosure relates to a power system, a power device, and a control device of the power system that can improve usability.

  The power system according to one aspect controls a first power device and a second power device capable of transmitting and receiving power with a mobile body capable of storing power, and power supply and reception by the power device to the mobile body. And a control device. The control device is configured so that the first power device can receive power from the first mobile body that performs discharge, and the second power device can transmit power to the second mobile body that performs charging. When connected, the first power device controls the DC power received from the first mobile body to supply power to the second mobile body.

  The power device according to one embodiment is a power device capable of transmitting power to or receiving power from a movable body capable of storing electric power, and is capable of transmitting power to the mobile body to be charged, and the other power When there is another mobile body that discharges and is connected so that the device can receive power, the other power device supplies DC power received from the other mobile body to the mobile body.

  According to one aspect of the present invention, there is provided a control method for a power system including a first power device and a second power device capable of transmitting or receiving power to / from a mobile body capable of storing power, and a control device. It is a method. In the control method, the first power device is connected so as to be able to receive power from the first moving body that performs discharging, and the second power device can transmit power to the second moving body that performs charging. When connected, the control unit includes a step of controlling the first power device to supply the second mobile body with DC power received from the first mobile body.

  According to the power system, the power device, and the control method of the power system according to the present disclosure, usability can be improved.

It is a figure showing a schematic structure of a power system concerning a 1st embodiment. It is a figure which shows an example of the connection of each function part in the electric power system of FIG. It is a block diagram showing an example of a schematic structure of a power generator. It is a block diagram which shows an example of schematic structure of an electric power apparatus. It is a block diagram which shows an example of schematic structure of a control apparatus. It is a sequence diagram which shows an example of the process in the electric power system of FIG. It is a sequence diagram which shows an example of the process in the electric power system of FIG. It is a flowchart which shows an example of the process which the control apparatus of FIG. 5 performs. It is a figure which shows typically the electric power supplied to a 2nd moving body. It is a figure which shows the example of the electric power feeding with respect to a 2nd mobile body. It is a figure which shows the example of the electric power feeding with respect to a 2nd mobile body. It is a figure which shows an example of a connection of each function part in the electric power system which concerns on 2nd Embodiment. It is a figure which shows an example of a connection of each function part in the electric power system which concerns on 3rd Embodiment. It is a figure which shows schematic structure of the electric power system which concerns on 4th Embodiment. It is a figure which shows an example of the connection of each function part in the electric power system of FIG.

  Hereinafter, embodiments will be described with reference to the drawings.

(Configuration of power system according to the first embodiment)
A power system 1 according to a first embodiment will be described with reference to FIGS. 1 and 2. The power system 1 may be installed in any parking space where a mobile can park. The parking space may include a parking lot, for example. In the present embodiment, it is assumed that the power system 1 is installed in a parking lot. The parking lot shown in FIG. 1 has two parking spaces in which mobiles can be parked. That is, the parking lot shown in FIG. 1 includes a first parking space Sa and a second parking space Sb.

  The moving body may be configured by any device that can move. The mobile may be capable of getting into the user. The mobile body may include, for example, a vehicle, a ship, a walking robot, and the like. The vehicle may include, for example, an electric vehicle, a hybrid electric vehicle, a gasoline vehicle, a motorcycle, a two-wheeled vehicle, and a welfare vehicle. The mobile may be driven or steered by the user. At least a part of the user operation related to driving or steering of the mobile object may be automated. The mobile body may be autonomously movable regardless of user operation.

  In the present embodiment, the moving body is described as an electric car. That is, in the present embodiment, the mobile body may be configured to include any type of battery capable of charging and discharging. For example, the power storage device 20 may be configured to include a lead storage battery, a lithium ion battery, a nickel cadmium battery, a nickel hydrogen battery, and the like.

  The power system 1 includes, as components, a power generation device 10, a power storage device 20, a first power device 30a, a second power device 30b, a control device 40, a first delivery restriction device 50a, 2 delivery restriction devices 50b and a display device 60. In the present specification, when the first power device 30a and the second power device 30b are not distinguished from each other, they are hereinafter referred to as a power device 30. Similarly, in the present specification, when the first delivery restriction device 50a and the second delivery restriction device 50b are not distinguished from one another, hereinafter, the delivery restriction device 50 will be described.

  Each component may be communicably connected to each other via wired or wireless. In the example illustrated in FIG. 2, for example, as indicated by a broken line, the power storage device 20, the first power device 30a, and the second power device 30b are communicably connected to the control device 40. The power generation device 10, the power storage device 20, the first power device 30a, and the second power device 30b may be connected to be able to transmit and receive power with each other via a wire. In the example illustrated in FIG. 2, the power generation device 10, the power storage device 20, the first power device 30a, and the second power device 30b are connected to be able to transmit and receive power by an AC transmission line 70. . The AC power transmission line 70 may be connected to a commercial power source, for example, as shown in FIG. In this case, it may be possible to sell power to supply the power generated by the power generation device 10 to the commercial power supply side, charge the power storage device 20 using power supplied from the commercial power supply, and the like. In the example illustrated in FIG. 2, the first power device 30 a and the second power device 30 b are connected by a DC transmission line 80 so as to be able to transmit and receive power. When the power system 1 includes three or more power devices 30, the three or more power devices 30 may be connected to each other by a DC power transmission line 80 so that power can be transmitted and received.

  Although the example shown in FIG.1 and FIG.2 shows two power devices 30 and two delivery limiting devices 50, the quantity of the power devices 30 and the delivery limiting devices 50 is not limited to this. For example, the respective quantities of the power devices 30 and the delivery restriction device 50 may be equal to the number of mobiles that can be parked in the parking lot where the power system 1 is installed, that is, the number of parking spaces in the parking lot. The quantities of the power generation device 10, the power storage device 20, the control device 40, and the display device 60 may be arbitrarily determined.

  The power generation device 10 generates power using arbitrary energy. The energy may include renewable energy such as sunlight, solar heat, wind power, and hydropower. The power generation apparatus 10 may include a fuel cell that generates power using, for example, hydrogen. In the present embodiment, the power generation device 10 will be described as a solar power generation device that generates electric power using solar energy. Details of the power generation device 10 will be described later.

  Power storage device 20 stores power. Power storage device 20 can discharge the stored power to alternating current transmission line 70. The power storage device 20 may be configured to include any type of battery that can be charged and discharged. For example, the power storage device 20 may be configured to include a lead storage battery, a lithium ion battery, a nickel cadmium battery, a nickel hydrogen battery, and the like. For example, power storage device 20 may store power generated by power generation device 10. The storage device 20 may store the power received from the moving body as described later. The power storage device 20 may include a bidirectional inverter that can receive or discharge AC power.

  The power device 30 performs at least one of power supply and power reception with a parked mobile body. In the present embodiment, the “power supply” includes the power device 30 supplying power to the mobile body. In this specification, “power reception” includes that the power device 30 is supplied with power from a moving body. Hereinafter, the amount of power supplied from the power device 30 to the mobile unit is also referred to as the amount of supplied power. The amount of power supplied from the moving body to the power device 30 is also referred to as a received power amount. When power is supplied to the mobile object, the power device 30 may use at least one of a commercial power source, the power generation device 10, and the power storage device 20 as a power source used for power supply. When power is supplied to a mobile unit, the power unit 30 may use another power unit 30 receiving power from another mobile unit. That is, the power device 30 may supply the mobile body with the power received from at least one of the commercial power source, the power generation device 10, the power storage device 20, and the other power devices 30. On the other hand, when power is received from a moving body, the power device 30 stores the power received from the moving body in, for example, the power storage device 20, supplies it to a commercial power source, or transmits power to another power device 30. You may Details of the power device 30 will be described later.

  The control device 40 controls power transmission and reception in the power system 1. The control device 40 may control, for example, power transmission and reception between the moving object and the power device 30. For example, the control device 40 may control power reception by the power device 30 from the commercial power source or the power generation device 10. The control device 40 may control charging / discharging by the power storage device 20, for example.

  The control device 40 may accept payment of a parking fee for the moving object. For example, the control device 40 may accept the payment of the charge when the parked mobile body leaves. Details of acceptance of payment of charges will be described later. The control device 40 may permit the moving object to be issued when the payment of the fee is detected. In the present embodiment, permitting leaving of the moving object may include enabling leaving of the moving object by controlling the operation of the delivery limiting device 50 described later. Details of the control device 40 will be described later.

  The delivery restriction device 50 includes any device capable of limiting the withdrawal of the parked mobile object. For example, the delivery limiting device 50 shown in FIG. 1 has a movable lock plate installed on the ground. When the parking of the mobile unit is detected, the delivery limiting device 50 raises the lock plate against the ground. In the state where the lock plate jumps up, the moving object is prevented from being taken out. On the other hand, the delivery limiting device 50 lowers the lock plate in the jumped state, for example, when the delivery of the moving object is permitted by the control device 40. In a state where the lock plate is lowered, the moving body can be delivered. However, the delivery restriction device 50 is not limited to the configuration having a lock plate. For example, the delivery restriction device 50 may have a gate that can be opened and closed.

  Display device 60 includes any display capable of displaying information. The display may include, for example, a liquid crystal display and an organic EL (Electro Luminescence) display. The size of the display may be arbitrarily determined. For example, the display may have a size such that a user who is driving the mobile body can easily visually recognize the display. The display device 60 may be integrated into, for example, the pillar portion of the openable / closable gate or the power device 30 described above. Details of the information displayed on the display device 60 will be described later.

(Utilization example of power system)
An example of using the power system 1 by a mobile user will be described. For example, a user driving a mobile parks the mobile in a parking lot where the power system 1 is installed.

  A user who wants to charge the mobile body may supply power to the mobile body from the power device 30 while the mobile body is parked. In other words, the user may cause the power device 30 to supply power to the mobile. When power is supplied to the moving body, the user pays a fee determined based on the parking time of the moving body and the amount of power supplied to the moving body, for example, when the moving body is delivered. The fee may be, for example, a value obtained by adding a power supply fee based on the power supply amount to a parking fee based on the parking time. In this case, the user pays a power supply charge in addition to the parking charge.

  On the other hand, a user who thinks that there is enough power stored in the mobile unit may supply power from the mobile unit to the power device 30 while the mobile unit is parked. In other words, the user may cause the power device 30 to receive power from the mobile. When power reception from a mobile body is performed, a reward according to the received power amount may be given to the user. The content of the reward may be arbitrarily determined. In the present embodiment, it is assumed that the reward is, for example, a reduction of the charge to be paid by the user when leaving the mobile unit. For example, the user pays a fee determined based on the parking time of the moving body and the amount of power received from the moving body when the moving body is issued. For example, the charge may be obtained by subtracting a power reception fee based on the amount of power received from a parking fee based on the parking time. In this case, the user pays the difference between the parking fee and the receiving fee. When the power device 30 is to receive power from the moving object, the user may be able to set the desired amount of reward within the range of the amount of power that can be supplied from the moving object to the power device 30. . In this case, the amount of power corresponding to the set amount of reward can be supplied from the mobile unit to the power device 30. The user may cause the power device 30 to receive power from the mobile in response to a request to supply power to the power device 30 for reasons such as peak cut, for example.

  The content of the reward is not limited to the example described above. For example, the reward may include money, virtual currency, and points that can be used for a predetermined service. For example, the reward may include a right to reduce a user's payment fee at a facility related to a parking lot where the power system 1 is installed. The facilities may include, for example, commercial facilities such as restaurants and electric retailers. Granting of a reward may be executed by issuing a ticket corresponding to the reward, for example. The grant of reward may be executed by storing electronic data corresponding to the reward in association with user identification information.

  In the present embodiment, the reward is given by the control device 40. In another embodiment, the reward may be provided by an external server that can communicate with the control device 40 via a communication network such as the Internet. For example, when the user clicks the settlement start button with the application of the smartphone, the power device 30 ends the power reception operation according to the communication from the external server. The power device 30 notifies the external server of the received power amount. The external server creates a code image such as a reduced barcode or QR code (registered trademark) according to the notified received power amount, and transmits it to the user's smartphone. The user can receive a reduction in payment by presenting the code image displayed on the smartphone, for example, at the time of liquidation of a meal or product purchase.

  Thus, the user using the power system 1 can cause the power device 30 to supply power to the mobile while the mobile is parked. Therefore, it is possible to realize the power system 1 which is highly convenient for the user who wants to charge the mobile body. Also, the user can cause the power device 30 to receive power from the mobile while the mobile is parked. Therefore, it is possible to realize the power system 1 which is highly convenient for the user who wants to obtain a reward by using the surplus power of the mobile body. The power system 1 can be used, for example, in the case of using the power obtained by charging a mobile with surplus power of solar power generation at home. Moreover, since the use of the electric power stored in the mobile body is promoted, the use efficiency of the electric power is improved for the user. Moreover, the motivation to move to the parking space where the electric power system 1 is installed can be given to the user. Therefore, for example, the economic activity of the user at a facility or the like related to the parking space may be activated.

(Configuration of power generator)
With reference to FIG. 3, the structure of the electric power generating apparatus 10 is demonstrated in detail. The power generation device 10 includes a power generation unit 11, an output unit 12, a sensor unit 13, a control unit 14, a DC / DC conversion unit 15, and a DC / AC conversion unit 16.

  The power generation unit 11 includes any device capable of generating power. The power generation unit 11 may include a solar cell, for example.

  The output unit 12 outputs the power generated by the power generation device 10 to the AC transmission line 70.

  The output unit 12 includes a DC / DC conversion unit 15. The output unit 12 adjusts the generated power of the power generation unit 11 using the DC / DC conversion unit 15. For example, the output unit 12 may adjust the generated power of the power generation unit 11 based on MPPT (Maximum Power Point Tracking) control by the control unit 14 as described later. The output unit 12 outputs the adjusted generated power.

  The output unit 12 further includes a DC / AC conversion unit 16. The DC / AC conversion unit 16 converts DC power output from the DC / DC conversion unit 15 into AC power. The DC / AC conversion unit 16 is connected to an alternating current transmission line 70 as shown in FIG. The power generated by the power generation apparatus 10 is supplied to the AC transmission line 70 from the DC / AC conversion unit 16 as AC power.

  The sensor unit 13 includes one or more optional sensors or detection mechanisms. For example, the sensor unit 13 may include a power sensor. The sensor unit 13 detects the generated power output from the output unit 12 using the power sensor installed between the output unit 12 and the AC power transmission line 70.

  The control unit 14 includes one or more processors. The processor may include a general-purpose processor and a dedicated processor specialized for a specific process. The control unit 14 controls the overall operation of the power generation device 10. For example, the control unit 14 may perform the MPPT control of the power generation unit 11 by controlling the DC / DC conversion unit 15 of the output unit 12. Control unit 14 may supply generated power output from output unit 12 to power storage device 20. The control unit 14 may notify the power device 30 and the control device 40 of the generated power detected by the sensor unit 13 (in other words, the output power after power conversion).

(Configuration of power equipment)
With reference to FIG. 4, the structure of the electric power apparatus 30 is demonstrated in detail. The power device 30 includes a communication unit 31, a sensor unit 32, a storage unit 33, a control unit 34, and an input / output unit 35.

  The communication unit 31 may include a first interface that transmits and receives information and / or power to and from an external device. The first interface may include a communication module, a connector, and the like that comply with any standard for supplying power and receiving power between the power device 30 and the mobile body. The standard may include standards such as CHAdeMO (registered trademark) and USB (registered trademark). For example, the power device 30 can be connected to a moving body via the communication unit 31. The connection between the power device 30 and the moving body may be made in a contact or non-contact manner. The transmission and reception of power between the power device 30 and the mobile unit may be performed automatically or in response to a user operation. In the present embodiment, the communication unit 31 can transmit / receive arbitrary information and / or power to / from a mobile body via the first interface. The communication unit 31 may include a second interface that transmits and receives information to and from an external device. The second interface may include a communication module corresponding to an arbitrary communication standard via, for example, wired or wireless. In the present embodiment, the communication unit 31 can transmit and receive arbitrary information to and from the control device 40 via the second interface.

  The sensor unit 32 includes one or more sensors or detection mechanisms. For example, the sensor unit 32 may include a power sensor and a remaining capacity sensor. The sensor unit 32 detects the amount of power supplied to the moving body and the amount of power received from the moving body using a power sensor. Sensor unit 32 detects the remaining capacity of power storage device 20 using the remaining capacity sensor. Arbitrary algorithms can be employed to detect the remaining capacity. For example, for detection of the remaining capacity, a remaining capacity estimation algorithm such as a current integration method or an open-circuit voltage method may be employed.

  The storage unit 33 includes one or more memories. For example, the storage unit 33 may include a semiconductor memory, a magnetic memory, an optical memory, or the like. The storage unit 33 may function as, for example, a primary storage device or a secondary storage device. The storage unit 33 may store any information used for the operation of the power device 30.

  Control unit 34 includes one or more processors. The control unit 34 controls the overall operation of the power device 30. For example, when the communication unit 31 and the parked mobile body are connected, the control unit 34 transmits a signal related to the content of the user operation on the power device 30 to the control device 40. The control unit 34 may perform power supply or power reception with the moving body based on the signal received from the control device 40.

  The input / output unit 35 inputs / outputs electric power based on the control of the control unit 34.

  The input / output unit 35 includes a DC / DC conversion unit 36. The input / output unit 35 uses the DC / DC conversion unit 36 to adjust the voltage value of the power supplied to the mobile body and the power received from the mobile body. When power device 30 receives supply of power from another power device 30, input / output unit 35 receives power supplied from DC transmission line 80 in DC / DC conversion unit 36. The power device 30 supplies the power received in this way from the DC / DC converter 36 to the moving body. The power device 30 supplies power to the DC power transmission line 80 from the DC / DC conversion unit 36 when supplying the power received from the moving body to the other power devices 30. At this time, the DC / DC converter 36 may adjust the voltage value.

  The input / output unit 35 further includes an AC / DC conversion unit 37. The AC / DC conversion unit 37 converts AC power supplied from the AC power transmission line 70 into DC power. The DC power converted by the AC / DC conversion unit 37 is adjusted in voltage value by the DC / DC conversion unit 36 and supplied from the DC / DC conversion unit 36 to the moving body.

  The input / output unit 35 further includes a DC / AC conversion unit 38. The DC / AC conversion unit 38 converts DC power received by the power device 30 from the moving body into AC power. For example, the DC / DC conversion unit 36 adjusts the voltage value of the power received by the power unit 30 from the moving object. The DC power whose voltage value has been adjusted is converted to AC power by the DC / AC converter 38 and supplied to the AC transmission line 70.

(Configuration of control device)
The configuration of the control device 40 will be described in detail with reference to FIG. The control device 40 includes a communication unit 41, a sensor unit 42, a storage unit 43, a control unit 44, an input unit 45, and a display unit 46.

  The communication unit 41 may include a second interface that transmits and receives information to and from an external device. In the present embodiment, the communication unit 41 can transmit and receive arbitrary information to and from the power generation device 10, the power device 30, the delivery restriction device 50, and the display device 60 via the second interface.

  The sensor unit 42 includes one or more sensors or detection mechanisms. For example, the sensor unit 42 may include a sensor of any configuration capable of detecting the receipt of the mobile object. The sensor may be configured to use, for example, a coil embedded in the ground, or may be configured to use an imaging device such as a camera. The sensor part 42 can detect receipt of a moving body using a parking sensor. For example, when the sensor unit 42 is configured to use a coil, the sensor unit 42 may detect the warehousing of the moving body by changing the magnetic force generated in the coil according to the presence or absence of the moving body. For example, in the case where the sensor unit 42 is configured to use an imaging device such as a monitoring camera, the sensor unit 42 may detect warehousing of the moving object by image analysis. The determination of the presence or absence of the moving body may be performed by the control unit 44 described later.

  The storage unit 43 includes one or more memories. The storage unit 43 may function as, for example, a primary storage device or a secondary storage device. The storage unit 43 may store any information used for the operation of the control device 40.

  The control unit 44 includes one or more processors. The control unit 44 manages overall power transmission and reception in the power system 1. For example, the control unit 44 manages power supply and power reception processing in the power device 30. Specifically, the control unit 44 transmits, to the power device 30, a signal that causes the power supply or power reception process to be performed. The control unit 44 may manage charging and discharging processes in the power storage device 20. Details of the power supply or power reception process controlled by the control unit 44 will be described later.

  The controller 44 controls the overall operation of the controller 40. For example, the control unit 44 may start measurement of the parking time of the moving body when the storage of the moving body is detected by the sensor unit 42. For example, in response to a user operation on the control device 40, the control unit 44 may end the measurement of the parking time of the mobile unit and may determine the parking time of the mobile unit.

  The control unit 44 determines the charge to be paid by the user of the mobile based on the parking time of the mobile and the amount of supplied or received power notified from the power device 30.

  Specifically, when power is supplied to the mobile unit, the control unit 44 determines the charge to be paid by the user, for example, by adding the power supply charge based on the amount of power supply to the parking charge corresponding to the parking time. May be For example, the longer the parking time, the higher the parking fee may be. The larger the power supply amount, the higher the power supply fee may be.

  On the other hand, when power is received from the moving body, the control unit 44 may determine a fee to be paid by the user, for example, by subtracting a power receiving fee based on the amount of power received from a parking fee. For example, the larger the power reception amount, the higher the power reception fee may be. If the power reception fee exceeds the parking fee, the control unit 44 may give the user of the mobile unit a reward according to a value obtained by subtracting the parking fee from the power reception fee. For example, the value of the reward may be higher as the value obtained by subtracting the parking fee from the incoming call fee is larger. Specifically, the larger the value obtained by subtracting the parking fee from the incoming fee, the more money, virtual currency, or points may be awarded to the user as a reward, for example.

  The control unit 44 permits the moving object to be delivered when payment of the determined fee is detected. Specifically, for example, the control unit 44 may permit the leaving of the moving object by transmitting an instruction to release the restriction of the leaving of the moving object to, for example, the leaving device limiting device 50.

  The control unit 44 may transmit, to the display device 60, a display instruction to cause the display device 60 to display arbitrary information. The said information may contain the information which shows the amount of money which a user should pay, and may contain the information which shows the power supply charge per unit electric energy. The said information may also include the information which shows the power reception charge rate per unit electric energy of the amount of power reception from a moving body. As described above, the display device 60 includes a display of a size that can be easily viewed by the user driving the mobile body. Therefore, the user driving the moving object can determine whether to park the moving object after visually recognizing the information displayed on the display device 60. Therefore, the convenience of the power system 1 is further improved. The display device 60 may be provided in each of the power devices 30.

  The input unit 45 receives an operation input from the user, and includes, for example, an operation button (operation key). The input unit 45 may be configured by a touch panel, and an operation key that receives an operation input from the user may be displayed on a part of the display device to receive a touch operation input by the user. In addition, application software installed in advance in the user's smartphone may communicate with the communication unit 41 to perform operation input. After storing the mobile, the user who desires to charge the mobile can perform an input for causing the mobile to perform power supply from the power system 1, for example, from the input unit 45. A user who desires to supply power from the moving body to the power system 1 performs input for executing supply of power from the moving body to the power system 1 from, for example, the input unit 45 after receiving the moving body. Can.

  The display unit 46 is a display device such as a liquid crystal display, an organic EL display, or an inorganic EL display. The display unit 46 displays predetermined information. The display unit 46 may display, for example, a parking fee, a power supply fee, and a power reception fee. The information displayed by the display unit 46 is not limited to this.

(Power supply and power reception processing in the power system)
Next, power supply and power reception processing in the power system 1 will be described in detail with reference to FIGS. 6 and 7. 6 and 7 are sequence diagrams showing an example of processing in the power system 1. It is assumed that the first parking space Sa and the second parking space Sb of the parking lot shown in FIG. 1 are both vacant at the start of the sequence of FIG. The sequence of FIG. 7 is executed following the sequence of FIG.

  It is assumed that the second mobile unit EV2 is parked in the second parking space Sb. In this case, the sensor unit 42 of the control device 40 detects warehousing of the mobile object in the second parking space Sb (step S11). The user may connect the second mobile unit EV2 stored in the second parking space Sb with the second power unit 30b so as to transmit and receive power. In the connection between the mobile unit and the power unit 30, both power transmission and power reception may not necessarily be possible. The connection between the mobile unit and the power unit 30 may allow only one of power transmission and power reception depending on the required processing. In the present specification, when the mobile unit and the power device 30 are connected, both of the power transmission and the power reception will be described as possible.

  Then, the control unit 44 of the control device 40 transmits, from the communication unit 41, a signal that causes the second delivery limiting device 50b to execute delivery limitation (step S12).

  The second delivery restriction device 50b restricts delivery of the second mobile unit EV2 based on the signal received from the control device 40 (step S13).

  When the delivery is restricted, the control device 40 requests, for example, the user to input desired processing. For example, the control device 40 causes the display unit 46 to display a screen requesting input of processing desired by the user. The process desired by the user includes, for example, a power supply process for the second mobile object EV2 and a power reception process from the second mobile object EV2. The user can input desired processing from the input unit 45, for example.

  The control device 40 receives an operation input to the input unit 45 from the user of the second moving body EV2 (step S14). Here, it is assumed that the control device 40 has received an input for causing the power system 1 to supply power to the second moving body EV2 by the user. At this time, the control device 40 may receive input of information related to power supply to the second mobile unit EV2. The information on feeding may include, for example, feeding time, feeding amount or feeding amount. The amount of power supplied here corresponds to the amount of charge of the second mobile unit EV2. The control device 40 may display information (hereinafter, also referred to as “power transmission support information”) that supports input of information related to power feeding on the display unit 46. The power transmission support information may include, for example, information indicating the relationship between the power supply time, the power supply amount, and the power supply amount for the second mobile EV2. The power transmission support information may be displayed in the form of a table or a graph. For example, the user can input information regarding power feeding based on the power transmission support information displayed on the display unit 46.

  When the control device 40 receives an input from the user of the second mobile unit EV2 for performing power supply to the second mobile unit EV2, the control unit 40 determines a power transmission path for power supply (step S15). Here, the control apparatus 40 determines the supply source of the electric power supplied to the 2nd mobile body EV2 as a power transmission path. Details of the method for determining the power transmission path will be described later. Here, it is assumed that the control device 40 receives the supply of power from the AC power transmission line 70 to the second power device 30b and determines to supply power to the second mobile unit EV2. Control device 40 may determine which of the commercial power supply, power generation device 10 and power storage device 20 receives power supply. When the power transmission route in the current power feeding is different from the power transmission route determined in step S15, the control device 40 may execute the process of changing the power transmission route in advance before shifting to step S16.

  Control device 40 transmits a signal for starting power supply to second mobile unit EV2 to second power device 30b (step S16).

  When the second power device 30b receives a signal for starting power supply from the control device 40, the second power device 30b starts power supply to the second mobile unit EV2 (step S17).

  Next, it is assumed that the first mobile unit EV1 is parked in the first parking space Sa. In this case, the sensor unit 42 of the control device 40 detects the movement of the moving body in the first parking space Sa (step S18). The user may connect the first mobile unit EV1 stored in the first parking space Sa with the first power unit 30a so as to transmit and receive power.

  Then, the control unit 44 of the control device 40 transmits, from the communication unit 41, a signal that causes the first delivery-limitation device 50a to execute delivery limitation (step S19).

  The first delivery limiting device 50a limits the removal of the first mobile EV1 based on the signal received from the control device 40 (step S20).

  When the delivery is restricted, the control device 40 requests, for example, the user to input desired processing. The user can input desired processing from the input unit 45, for example.

  The control device 40 receives an operation input to the input unit 45 from the user of the first moving body EV1 (step S21). Here, it is assumed that the control device 40 has received an input for causing the power system 1 to receive power from the first moving body EV1 by the user. At this time, the control device 40 may receive an input of information related to power reception from the first mobile unit EV1. The information regarding power reception may include, for example, a power reception time, a power reception amount, or a power reception amount. The amount of received power here corresponds to the amount of discharge of the first mobile unit EV1. The control device 40 may display information (hereinafter, also referred to as “power reception support information”) that supports the input of the information related to the power reception on the display unit 46. The power reception support information is, for example, information indicating a relationship between a power reception time, a power reception amount, and a power reception amount for the first mobile EV1, or a power remaining amount of the first mobile EV1 after the power reception processing. And information indicating the relationship between the remaining distance and the possible travel distance. The power reception support information may be displayed in the form of a table or a graph. For example, the user can input information regarding power reception based on the power reception support information displayed on the display unit 46.

  Here, a specific example of the power reception support information will be further described. For example, it is assumed that the storage amount (remaining amount) of the battery provided in the first mobile unit EV1 is 25 kWh. Further, it is assumed that the distance that the first mobile unit EV1 can travel with the amount of power of 1 kWh is 4 km to 10 km. Here, it is assumed that the user of the first mobile unit EV1 inputs the received power amount of 20 kWh to the first power device 30a as the information related to the received power, to the control device 40. In this case, the control device 40 calculates the storage amount of the battery after the power reception process. Here, the control device 40 calculates that the storage amount of the battery after the power reception process is 5 kWh. And the control apparatus 40 calculates the distance which the 1st mobile body EV1 can move with the electrical storage amount after an electric power receiving process. Here, the control device 40 calculates that the distance that the first moving body EV1 can move with the amount of stored electricity after the power receiving process is 20 km to 50 km. The control device 40 displays, for example, the calculated movable distance on the display unit 46 as power reception support information. Here, the control device 40 displays, on the display unit 46, information indicating that the first mobile unit EV1 can move from 20 km to 50 km after power reception. The control device 40 may further display the movable range from the parking lot where the power system 1 is installed as a map on the basis of the calculated movable distance, as the power reception support information.

  For example, it is assumed that the storage amount (remaining amount) of the battery provided in the first mobile unit EV1 is 25 kWh. Further, it is assumed that the distance that the first mobile unit EV1 can travel with the amount of power of 1 kWh is 4 km to 10 km. Further, it is assumed that the power reception fee in the power system 1 is set to 20 yen per kWh. Here, it is assumed that the user of the first mobile unit EV1 inputs power for 500 yen to the first power device 30a as information related to power reception, and inputs the information to the control device 40. In this case, the control device 40 calculates the received power amount based on the received power charge input by the user. Here, the control device 40 calculates that the received power amount is 25 kWh. Next, the control device 40 determines whether the calculated received power amount is a valid received power amount. For example, it may be determined based on the distance that the first mobile unit EV1 can travel after the power reception process, for example, whether or not the received power amount is appropriate. For example, here, it is assumed that the power reception amount is set such that the distance that the first moving body EV1 can move after the power reception processing is 40 km as the threshold value of the appropriate power reception amount. The control device 40 determines whether or not the calculated received power amount is a proper received power amount based on the comparison of the storage amount of the battery after the power reception processing and the threshold value. Here, since the power reception amount is 40 kWh, the distance by which the first mobile unit EV1 can move is 40 km, the threshold is 10 kWh.

  The control device 40 first calculates the storage amount after the power reception process. Here, it is calculated that the storage amount after the power reception process is 0 kWh. Control device 40 determines whether or not the storage amount after the power reception process is equal to or greater than a threshold. The control device 40 determines that the amount of received power that the user intends to cause the first power device 30a to receive power is appropriate when the amount of stored power after the power reception processing is equal to or greater than the threshold. The control device 40 determines that the amount of received power that the user tries to cause the first power device 30a to receive power is not appropriate when the amount of stored power after the power reception processing is less than the threshold. In the example shown here, the storage amount after the power reception process is 0 kWh and the threshold value is 10 kWh. Therefore, the control device 40 determines that the amount of power received by the user to be received by the first power device 30a is not appropriate. judge. In particular, in the example here, since the storage amount after the power reception process is 0 kWh, if the power reception process is temporarily performed, the first mobile EV1 can not move after the power reception process. In this way, when the control device 40 determines that the amount of power received by the user to be received by the first power device 30a is not appropriate, the power reception amount is valid as the power reception support information without executing the power reception process. May be displayed on the display unit 46. In this case, the control device 40 may perform display for requesting re-input of information related to the received power amount. In response to the re-input, the user can input information related to the amount of power received again. The control device 40 may indicate in advance the range of the amount of received power that can be selected by the user on the display unit 46 as the power reception support information. The selectable range of the received power amount may be a range in which the stored power amount after the power reception process is equal to or more than the threshold.

  The control device 40 may display the power reception support information based on the distance to the destination of the user after the power reception processing. For example, it is assumed that the storage amount (remaining amount) of the battery provided in the first mobile unit EV1 is 25 kWh. Further, it is assumed that the distance that the first mobile unit EV1 can travel with the amount of power of 1 kWh is 4 km to 10 km. The user inputs information related to the destination after the power reception process when inputting information related to power reception. The information on the destination may be the distance from the parking lot where the power system 1 is installed to the destination, or may be information that can specify the position of the destination such as the address of the destination. The control device 40 calculates the amount of electric power necessary for the first moving body EV1 to move from the parking lot to the destination. The control device 40 calculates the amount of power that the user can cause the first power device 30a to receive, based on the amount of power necessary for the first mobile unit EV1 to move from the parking lot to the destination, It is displayed on the display unit 46 as power reception support information. For example, it is assumed that the user's destination is 30 km from the parking lot. In this case, the control device 40 calculates that the amount of power necessary for the first mobile unit EV1 to move to the destination is 7.5 kWh. The control device 40 subtracts the calculated 7.5 kWh from the battery storage amount 25 kWh of the battery of the first moving body EV1, and the amount of power that can be received by the user in the first power device 30a is 17.5 kWh. Calculate The control device 40 may indicate the amount of power that the user can receive power to the first power device 30a on the display unit 46 as power reception support information. For example, the control device 40 may cause the user to input a power amount equal to or less than the power amount that the user can cause the first power device 30 a to receive power.

  When the control device 40 receives an input from the user of the first mobile unit EV1 for performing the power supply from the first mobile unit EV1, the control unit 40 causes the first power unit 30a to calculate the amount of power according to the information related to the power reception. To receive the power. In the case of power reception by the first power device 30a, the control device 40 determines a power transmission path in the power reception (step S22). Here, the control device 40 determines the supply destination of the power received from the first mobile unit EV1 as the power transmission path. Details of the method for determining the power transmission path will be described later. Here, the control device 40 receives the electric power received from the first moving body EV1 from the first electric power device 30a via the DC power transmission line 80 and the second electric power device 30b. It is assumed that power is transmitted to the second mobile body EV2.

  At this time, since the second power unit 30 b receives the supply of power from the AC transmission line 70, the second power unit 30 b is connected to the AC transmission line 70 so as to be able to transmit and receive power. The control device 40 transmits a signal for changing the power transmission path to the second power device 30b in order to connect the second power device 30b to the DC power transmission line 80 so as to transmit and receive power (Step S23). When the first power device 30a is connected to the AC power transmission line 70 so as to be capable of transmitting and receiving power, the control device 40 also transmits a signal for changing the power transmission path to the first power device 30a. (Step S23).

  The first power device 30a and the second power device 30b change the power transmission path based on the signal from the control device 40 (step S24). For example, the first power device 30a and the second power device 30b perform power transmission by connecting the DC power transmission line 80 and power transmission so as to transmit power by switching relays in the DC / DC conversion unit 36. Change the route

  The control device 40 transmits a signal to start power reception from the first mobile unit EV1 to the first power device 30a (step S25).

  When the first power device 30a receives a signal for starting power reception from the control device 40, the first power device 30a starts power reception from the first mobile unit EV1 (step S26). That is, the first power device 30a causes the first moving body EV1 to start discharging. In step S24, since the power transmission path has been changed, the power discharged from the first mobile unit EV1 is transmitted from the first power unit 30a via the second power unit 30b via the DC power transmission line 80. And the second mobile unit EV2 receiving power is supplied with power. That is, the power discharged from the first mobile unit EV1 is supplied to the second mobile unit EV2 as it is as the DC power without being converted into AC power. As described above, when the first mobile unit EV1 discharges and the second mobile unit EV2 charges, the control device 40 supplies power from the first mobile unit EV1 to the second mobile unit EV2. Control. By controlling in this way, the direct-current power discharged from the first mobile body EV1 can be fed to the second mobile body EV2 without converting it into alternating-current power, and therefore conversion between direct-current power and alternating-current power is performed. Compared to the case, the power loss generated by the conversion can be reduced. In the case where the specifications of each mobile body EV are different, such as when the output voltage of the first mobile body EV1 on the power supply side is lower than that of the second mobile body EV2, the first power device 30a or the second power device 30a The power device 30b of can be used to adjust the voltage. Even if adjustment of the feed power value to the second mobile unit EV2 (in other words, the discharge power value of the first mobile unit EV1) is performed by only one of the first power unit 30a and the second power unit 30b You may do it with both.

  Here, it is assumed that power reception from the first mobile unit EV1 by the first power unit 30a is completed. That is, it is assumed that power reception of the power of the received power amount input in step S21 from the first power device 30a is completed. In this case, the control device 40 transmits a signal for stopping power reception to the first power device 30a (step S27).

  When the first power device 30a receives a signal for stopping power reception from the control device 40, the first power device 30a stops power reception from the first moving body EV1 (step S28).

  Then, the control device 40 transmits a signal for changing the power transmission path to the first power device 30a and the second power device 30b (step S29). Here, the control device 40 transmits a signal to change (return) to the power transmission path before the power transmission path is changed by the processing in step S23 and step S24.

  The first power device 30a and the second power device 30b change the power transmission path based on the signal from the control device 40 (step S30). Here, for example, the first power device 30a and the second power device 30b are connected to the AC power transmission line 70 so as to be able to transmit and receive power by switching relays in the DC / DC conversion unit 36. Ru.

  When the first mobile unit EV1 is delivered, the control device 40 determines the charge to be paid by the user of the first mobile unit EV1 (step S31). For example, the control device 40 may determine the fee based on the parking time of the first moving body EV1 and the amount of power received by the power system 1 from the first moving body EV1. For example, the control device 40 determines, as a fee to be paid by the user, an amount obtained by subtracting a power reception fee calculated based on the amount of received power from a parking fee calculated based on the parking time.

  For example, as described above, the power reception fee may be higher as the power reception amount is larger. For example, when the electric power discharged from the first mobile unit EV1 is supplied to the DC transmission line 80, compared to the case where the electric power discharged from the first mobile unit EV1 is supplied to the AC transmission line 70, As described above, the power loss caused by the conversion can be reduced. Therefore, when discharging from the first moving body EV1, the second moving body EV2 for which power supply is desired exists in the parking lot, and the DC power transmission line 80 is transferred from the first moving body EV1 to the second moving body EV2. When the DC power is supplied via the power supply system, the power system 1 has the power loss which does not occur as compared to the case where the power discharged from the first mobile unit EV1 is supplied to the AC transmission line 70. A lot of power can be used. In this case, since the user of the first mobile unit EV1 does not reduce the reception fee for the power loss, the reward obtained by the user of the first mobile unit EV1 may be large.

  The power reception fee may differ depending on, for example, the supply destination of the power discharged from the first mobile unit EV1. For example, when the electric power discharged from the first mobile body EV1 is supplied to the DC power transmission line 80, the electric power received is more than the case where the electric power discharged from the first mobile body EV1 is supplied to the AC power transmission line 70. The price may be higher. In this case, when discharging from the first moving body EV1, the second moving body EV2 for which power supply is desired exists in the parking lot, and a DC power transmission line is transferred from the first moving body EV1 to the second moving body EV2. When the DC power is supplied via 80, the power reception fee is higher than the case where the power discharged from the first mobile unit EV1 is supplied to the AC transmission line 70. Therefore, the reward obtained by the user of the first mobile unit EV1 is increased. The power reception fee may differ depending on whether the supply destination of the power received from the first mobile unit EV <b> 1 is a commercial power source or the power storage device 20.

  The control device 40 may cause the display unit 46 to display the charge determined in step S31, for example. The user performs a payment procedure for the controller 40. The control device 40 accepts payment of a fee from the user (step S32).

  When receiving the payment of the fee, the control device 40 transmits a signal for releasing the delivery restriction to the first delivery restriction device 50a (step S33).

  The first delivery restriction device 50a releases the delivery restriction of the first mobile EV1 based on the signal received from the control device 40 (step S34). The user of the first moving body EV1 can ride from the parking lot on the first moving body EV1 for which the delivery restriction is released.

  Next, it is assumed that the power supply from the second power device 30b to the second moving body EV2 is completed. That is, for example, it is assumed that the feeding of the power of the feeding amount input in step S14 from the second power device 30b is ended. In this case, the control device 40 transmits a signal for stopping power feeding to the second power device 30b (step S35).

  When the second power device 30b receives the signal for stopping the power supply from the control device 40, the second power device 30b stops the power supply to the second mobile unit EV2 (step S36).

  When the second mobile unit EV2 is delivered, the control device 40 determines the charge to be paid by the user of the second mobile unit EV2 (step S37). For example, the control device 40 may determine the charge based on the parking time of the second mobile unit EV2 and the amount of power supplied to the second mobile unit EV2. For example, the control device 40 determines, as the charge to be paid by the user, an amount obtained by adding the power supply charge calculated based on the amount of supplied power to the parking charge calculated based on the parking time.

  For example, as described above, the power supply fee may be higher as the amount of power supply is larger.

  The power supply fee may be determined based on, for example, power used by the power system 1 for power supply. The power supply fee may be higher as the power used by the power system 1 for power supply is larger, for example. For example, when the power supplied to the second mobile unit EV2 is supplied from the DC transmission line 80, compared to the case where the power supplied to the second mobile unit EV2 is supplied from the AC transmission line 70, As described above, the power loss caused by the conversion can be reduced. Therefore, when power is supplied to the second moving body EV2, the first moving body EV1 that is desired to be discharged exists in the parking lot, and the DC power transmission line 80 is transferred from the first moving body EV1 to the second moving body EV2. When the direct-current power is supplied through the power system 1, the power system 1 has a portion in which the power loss does not occur as compared with the case where the power supplied to the second mobile body EV2 is supplied from the alternating-current transmission line 70. , Substantially less power is used. Therefore, when the power supply fee is determined based on the power used by the power system 1, the user does not need to pay the fee for the power loss, so the amount paid by the user of the second mobile EV2 can be low. .

  The power reception fee may vary depending on, for example, the supply source of the electric power supplied to the second mobile body EV2. For example, when power supplied to the second mobile unit EV2 is supplied from the DC power transmission line 80, power supply is performed more than when power supplied to the second mobile unit EV2 is supplied from the AC power transmission line 70. The price may be lower. In this case, when power is supplied to the second moving body EV2, the first moving body EV1 that is desired to be discharged is present in the parking lot, and a DC power transmission line is transferred from the first moving body EV1 to the second moving body EV2. When DC power is supplied via 80, the power supply fee is lower than when the power supplied to the second mobile unit EV2 is supplied from the AC transmission line 70. Therefore, the amount paid by the user of the second mobile EV2 is reduced. The power supply fee may be different depending on whether the power supplied to the second mobile body EV2 is a commercial power source, the power generation device 10, or the power storage device 20.

  The control device 40 may cause the display unit 46 to display the fee determined in step S37, for example. The user performs a payment procedure for the controller 40. The control device 40 accepts payment of a fee from the user (step S38).

  When receiving the payment of the fee, the control device 40 transmits a signal for releasing the delivery restriction to the second delivery restriction device 50b (step S39).

  The second delivery restriction device 50b releases the delivery restriction of the second moving body EV2 based on the signal received from the control device 40 (step S40). The user of the second moving body EV2 can move from the parking lot on the second moving body EV2 for which the delivery restriction is released.

(Transmission route determination process)
Next, with reference to FIG. 8, the details of the process of determining the power transmission route by the control device 40 will be described. FIG. 8 is a flowchart showing an example of processing executed by the control device 40, and is a flowchart showing details of step S15 and step S22 of FIG.

  The control device 40 determines whether or not an input for executing power feeding from the power device 30 to the moving body has been received from the user (step S41).

  If the control device 40 determines that the input for performing the power supply to the mobile object from the power device 30 is received (Yes in step S41), the power device receiving power from the mobile object in the power system 1 is It is determined whether there is any (step S42).

  If the control device 40 determines that there is a power device 30 receiving power from the moving object (Yes in step S42), the control device 40 controls the power device receiving power from the moving object and the start of this flow. It is determined that power is transmitted through the DC power transmission line 80 between the mobile device of the user who has input to the device 40 and the power device 30 connected to be able to transmit and receive power (step S43). In this case, the control device 40 transmits a signal for changing the power transmission route to the determined route, as necessary, to the power device 30, and causes the DC power transmission line 80 to execute power transmission by DC power.

  On the other hand, when the control device 40 determines that there is no power device receiving power from the moving body (No in step S42), the control device 40 determines that the AC power transmission line 70 supplies power to the moving body via the power device 30. (Step S44). In this case, the control device 40 transmits a signal for changing the power transmission route to the determined route, to the power device 30 as needed, and causes the AC power transmission line 70 to supply power to the power device 30.

  When electric power is supplied from the AC power transmission line 70 to the mobile unit through the power unit 30, the control unit 40 controls at least one of the commercial power source, the power generation unit 10, and the storage unit 20 as a power source used for power feeding. You may use it. The control device 40 may use the power generation device 10 or the power storage device 20 with priority over the commercial power supply. For example, when the remaining capacity of power storage device 20 is equal to or greater than a predetermined first reference value, control device 40 may use power storage device 20 as a power source used for power feeding. When the remaining capacity of the power storage device 20 is less than the first reference value and the generated power of the power generation device 10 is greater than or equal to a predetermined second reference value, the control device 40 uses the power generation device 10 as a power source used for power supply. You may use it. Specifically, when the power generation device 10 is used as a power source used for power feeding, the control device 40 may transmit a request for supplying generated power to the power generation device 30 to the power generation device 10. The power device 30 may supply the mobile body with the generated power received from the power generation device 10 in response to the request.

  When it is determined that the control device 40 does not receive an input for performing power supply from the power device 30 to the mobile unit (No in step S41), the input for performing power reception from the mobile device by the power device 30 Is judged from the user (step S45). The determination that the input for executing the power supply is not accepted can be made based on, for example, whether a predetermined time (for example, several minutes) has passed without an input for executing the power supply. The determination that the input for causing the power supply to be performed is not received may also be performed based on, for example, whether or not an input indicating that the power supply is not to be performed is received from the user.

  When the control device 40 determines that the input for performing the power reception from the moving object by the power device 30 is not received from the user (No in step S45), the flow ends. This is because it is recognized that the user does not desire the power supply process or the power reception process. The determination that the input for performing the power reception has not been received can be performed, for example, based on whether or not a predetermined time (for example, several minutes) has elapsed without the input for performing the power reception. The determination that the input for causing the power reception to be performed may not be received, for example, based on whether or not the input indicating that the power reception should not be performed is received from the user.

  On the other hand, when the control device 40 determines that the input for executing power reception from the moving object by the power device 30 has been received from the user (Yes in step S45), the power system 1 supplies power to the moving object. It is determined whether or not there is a power device 30 (step S46).

  If the control device 40 determines that there is a power device 30 supplying power to the moving body (Yes in step S46), the power device supplying power to the moving body and the control device at the start of the flow It is determined that power is transmitted via the DC power transmission line 80 between the moving body of the user who has input to 40 and the power device 30 connected to be able to transmit and receive power (step S43). In this case, the control device 40 transmits a signal for changing the power transmission route to the determined route, as necessary, to the power device 30, and causes the DC power transmission line 80 to execute power transmission by DC power.

  On the other hand, when control device 40 determines that there is no power device 30 supplying power to the moving body (No in step S46), the power received by power device 30 from the moving body is transmitted to AC power transmission line 70. It is determined to supply (step S47). In this case, the control device 40 transmits a signal for changing the power transmission route to the determined route, as necessary, to the power device 30, and causes the power device 30 to supply power to the AC power transmission line 70.

  When the electric power device 30 supplies the electric power received from the moving body to the AC power transmission line 70, the control device 40 may supply the electric power received from the moving body to the power storage device 20 or reverse power flow to the commercial power source. You may let them. Reverse power flow includes transmission from a consumer toward a commercial power source. For example, the manager of the power system 1 can be given a price according to the reversely flowed power from the power company.

  As described above, in the power system 1 according to the present embodiment, when there is the first mobile EV1 that performs discharge and the second mobile EV2 that performs charging, the control device 40 performs the first operation. The DC power received by the first power unit 30a from the mobile unit EV1 is fed from the second power unit 30b to the second mobile unit EV2. Therefore, according to the power system 1, power loss due to conversion does not occur as compared with the case of converting DC power and AC power. In this way, according to the power system 1, the energy can be used more efficiently, and thus the usefulness is improved.

  In the above embodiment, only one of the AC power transmission line 70 and the DC power transmission line 80 is selected as the power transmission path. However, as the power transmission path, both of the AC power transmission line 70 and the DC power transmission line 80 are selected. It may be done. That is, power device 30 may be configured to be connectable to both AC power transmission line 70 and DC power transmission line 80. For example, when the first mobile unit EV1 performs discharge and the second mobile unit EV2 performs charging, for example, the control device 40 controls the DC power received by the first power device 30a from the first mobile unit EV1, The second power unit 30b supplies power to the second mobile unit EV2 through the DC power transmission line 80, and the AC power transmission line 70 supplies power to the second mobile unit EV2 through the second power unit 30b. You may In this case, compared with the case where electric power is supplied from only the DC power transmission line 80 to the second mobile unit EV2, the power supply to the second mobile unit EV2 can be completed earlier.

  In the above embodiment, the case where the control device 40 determines the power transmission path based on the presence or absence of power supply or power reception to the mobile body has been described. However, the determination of the power transmission path by the control device 40 may not necessarily be based solely on the presence or absence of power supply or power reception to the mobile object. For example, the control device 40 may determine the power transmission path based on the information on power supply and the information on power reception. The determination of the power transmission path may include control to limit the power value supplied from the AC power transmission line 70 instead of switching the relay. In this case, the determination of the power transmission path may be performed, for example, by the execution and release of the restriction (which power transmission path is mainly used to control the received power from the first mobile unit EV1).

  Here, an example in which the control device 40 determines a power transmission path on the basis of the information on power supply and the information on power reception will be described. Here, it is assumed that the information on power feeding is the amount of power feeding and the information on power reception is the amount of power receiving. For example, when receiving an input for executing power reception from the first mobile body EV1, the control device 40 receives the amount of power received from the first mobile body EV1 input by the user and the second mobile body EV2. Compare with the remaining power supply for. The remaining power supply amount for the second mobile unit EV2 is a power amount obtained by subtracting the amount of power already supplied to the second mobile unit EV2 from the power supply amount input by the user of the second mobile unit EV2. The amount of power to be supplied to the second mobile unit EV2 after the time when the input from the first mobile unit EV1 is received. The remaining power supply amount for the second moving body EV2 is hereinafter also referred to as “scheduled power supply amount”.

  As a result of comparison between the amount of power received from the first mobile unit EV1 and the expected amount of power supplied to the second mobile unit EV2, the control device 40 determines that the first movable unit is larger than the amount of received power. It is determined that the entire amount of power received from EV1 is to be supplied to second mobile unit EV2. In this case, the control device 40 determines to transmit DC power from the first power device 30a to the second power device 30b via the DC power transmission line 80. The control device 40 supplies power received from the first mobile unit EV1 to the second mobile unit EV2 by direct current power transmission, and then power is supplied from the AC power transmission line 70 to the second power unit 30b through the power transmission path. You may control so that. In this case, power may be supplied from the AC power transmission line 70 to the second power device 30b until the planned power supply amount of the second mobile unit EV2 is satisfied. Thus, for example, as shown in FIG. 9 as an example, the first power device 30a receives the amount of power received from the first mobile unit EV1, and is supplied from the AC power transmission line 70 to the second power device 30b. The supply amount of the second moving body EV2 is satisfied by the amount of electric power.

FIG. 10 is a diagram showing an example of power feeding to the second mobile unit EV2. In FIG. 10, the vertical axis indicates power, and the horizontal axis indicates time. Further, in this example, it is assumed that an upper limit is set for the value of electric power to be discharged in consideration of protection of the battery life of the first moving body EV1. For example, at time t _0, the receiving from the first mobile EV1 of the first power device 30a is started. The power received by the first power unit 30a from the first mobile unit EV1 is supplied to the second power unit 30b via the DC transmission line 80, and the second power unit EV2 is supplied from the second power unit 30b. Is supplied with power. At time t _1, according to the first power device 30a, when receiving the input received power amount is completed, the control unit 40, the power transmission path is switched to the AC power lines 70. That is, from the time t _1, power is supplied from the AC transmission line 70 to the second power device 30b. Then, for example, will feed amount for the second mobile EV2 at time t ₂ is satisfied, the feeding is completed.

  On the other hand, as a result of comparison between the amount of power received from the first mobile unit EV1 and the expected amount of power supplied to the second mobile unit EV2, the control device 40 performs the first process when the estimated amount of power supplied is less than the received amount. The electric power received from the mobile unit EV1 is supplied to the second mobile unit EV2, and the electric power received from the first mobile unit EV1 is supplied to the AC power transmission line 70 after the planned power supply amount of the second mobile unit EV2 is satisfied. You may decide to send power. In this case, the control device 40 first determines to transmit DC power from the first power device 30a to the second power device 30b via the DC power transmission line 80. When it is determined that the scheduled power supply amount of the second moving body EV2 is satisfied, the control device 40 changes the power transmission path, and supplies the AC power transmission line 70 with the power received by the first power device 30a. The power transmitted to the AC transmission line 70 may be stored in the storage device 20 or may be supplied to a commercial power source.

  As described above, when the power device 30 is configured to be simultaneously connectable to both the AC power transmission line 70 and the DC power transmission line 80, the control device 40 determines that the planned power supply amount is equal to or greater than the received power amount. , And the second power unit 30b may be connected to both the AC transmission line 70 and the DC transmission line 80. In this case, while AC power is supplied from AC power transmission line 70 to second power device 30b, DC power is supplied from first power device 30a to second power device 30b via DC power transmission line 80. Ru.

  Similarly, when the power device 30 is configured to be simultaneously connectable to both the AC power transmission line 70 and the DC power transmission line 80, the control device 40 determines that the planned power supply amount is less than the received power amount. One power unit 30 a may be connected to both the AC transmission line 70 and the DC transmission line 80. In this case, power is supplied from the first power device 30a to the AC power transmission line 70, and DC power is supplied from the first power device 30a to the second power device 30b via the DC power transmission line 80. .

  In the power system 1, each power device 30 may be configured to receive supply of DC power from a plurality of power devices 30. For example, the second power unit 30b for supplying power to the second mobile unit EV2 is connected to the first power unit 30a for receiving power from the first mobile unit EV1 by the DC power transmission line 80, and It may be configured to be connected by a DC transmission line 80 with another power device (third power device 30c) that receives power from another mobile object (third mobile device EV3). In this case, for example, when DC power is transmitted from the first power device 30a to the second power device 30b via the DC power transmission line 80, the DC power transmission line 80 is further connected from the third power device 30c. The DC power may be transmitted to the third power device 30c via the third power device 30c.

FIG. 11 is a diagram showing an example of power feeding to the second mobile unit EV2. In FIG. 11, the vertical axis indicates power, and the horizontal axis indicates time. Further, as in the example of FIG. 10, it is assumed that the upper limit is provided to the feeding power value of the first mobile unit EV1. For example, at time t _0, the receiving from the first mobile EV1 of the first power device 30a is started. The power received by the first power unit 30a from the first mobile unit EV1 is supplied to the second power unit 30b via the DC transmission line 80, and the second power unit EV2 is supplied from the second power unit 30b. Is supplied with power. In this state, it is assumed that the third mobile unit EV3 is connected to the third power unit 30c, and that power reception from the third mobile unit EV3 by the third power unit 30c is started by the user's input. At this time, the control device 40 may connect the second power device 30 b and the third power device 30 c to the DC power transmission line 80 to control power transmission and reception. In this case, for example, at time t _3, the power receiving from the third mobile EV3 according to a third power devices 30c is started. The third power device 30c transmits the power received from the third mobile unit EV3 to the second power device 30b via the DC transmission line 80. The second power device 30b supplies the power received from the third power device 30c to the second moving body EV2. Then, for example, will feed amount for the second mobile EV2 time t ₄ is satisfied, the feeding is completed. In this case, the power supply can be completed more quickly than the case where the second power device 30b feeds only the power received from the first power device 30a to the second mobile unit EV2.

  In addition, when the control device 40 receives a plurality of inputs for performing at least one of power feeding and power reception, the control device 40 determines a combination of a mobile that appropriately feeds power and a mobile that receives power based on the power feeding amount and the power receiving amount. May be. For example, in the case where there are a plurality of mobile units receiving power supply from power unit 30, the control is performed when the mobile unit is newly connected to power unit 30 and receives an input for executing power reception by power unit 30. The device 40 may compare the amount of power received by the new mobile unit with the planned amount of power supplied by the plurality of mobile units receiving power. For example, the control device 40 may determine that the received power from the new mobile body is supplied as DC power to the mobile body whose scheduled power supply amount is closest to the received power amount by the new mobile body. The control device 40 can execute the same process even when there are a plurality of mobile units performing power reception by the power device 30.

(Configuration of Power System According to Second Embodiment)
FIG. 12 is a diagram showing an example of connection of each functional unit in the power system 2 according to the second embodiment. A power system 2 according to a second embodiment will be described with reference to FIG. In addition, about the content which is common in 1st Embodiment, description is abbreviate | omitted suitably.

  In the power system 2 according to the present embodiment, the first power device 30 a, the second power device 30 b, and the power storage device 20 are connected by a DC power transmission line 80. That is, in the power system 2, the first power device 30a, the second power device 30b, and the power storage device 20 can mutually transmit and receive DC power. The first power device 30 a and the second power device 30 b in the power system 2 may not include the AC / DC conversion unit 37 and the DC / AC conversion unit 38.

  The DC transmission line 80 is connected via the AC / DC conversion device 90 to a commercial power source to which power is transmitted / received by AC power. The AC / DC converter 90 converts AC power supplied from a commercial power source into DC power and supplies power to the DC transmission line 80. The AC / DC converter 90 is communicably connected to the controller 40. Therefore, the AC / DC conversion device 90 may be controlled based on the control signal from the controller 40. The power system 2 may include a DC / AC conversion device for converting direct current power into alternating current power, between the direct current transmission line 80 and a commercial power supply. For example, when the DC power flowing through the DC transmission line 80 is reversely flowed to the commercial power source side, the DC power is converted into AC power by the DC / AC conversion device.

  The power generation device 10 is electrically connected between the commercial power supply and the AC / DC conversion device 90 via an AC transmission line 70.

  In the power system 2, for example, when the control device 40 receives an input for receiving power from the first mobile body EV1, the control device 40 receives the power received by the first power device 30a from the first mobile body EV1. It may be transmitted to the commercial power source side via the storage device 20 or the AC transmission line 70. In power system 2, for example, control device 40 receives power storage device 20 or AC power transmission line 70 from second power device 30b when receiving an input for performing power supply to second mobile unit EV2. Thus, electric power may be supplied to the second moving body EV2. When the power is supplied from the AC transmission line 70, the power is supplied from the commercial power source or the power generation device 10.

  For example, in the power system 2, the control device 40 receives the amount of power received from the first mobile body EV1 connected to the first power device 30a and the second mobile body EV2 connected to the second power device 30b. Compare with the planned power supply amount. As a result of the comparison, when the scheduled power supply amount is equal to or greater than the power reception amount, the control device 40 may perform control so that the entire amount of power received from the first mobile body EV1 is supplied to the second mobile body EV2. In this case, control device 40 may further control to supply the power stored in power storage device 20 to second mobile unit EV2. Even if the amount of power received from the first mobile unit EV1 and the amount of power stored in the power storage device 20 are supplied to the second mobile unit EV2, the planned power supply amount of the second mobile unit EV2 is not reached. The control device 40 may further supply power to the second moving body EV2 from the AC power transmission line 70 side. In this way, by supplying power from the plurality of power supply sources to the second moving body EV2, it becomes easy to satisfy the scheduled power supply amount of the second moving body EV2. In addition, by supplying power from the plurality of power supply sources to the second mobile EV 2 at the same time, it is easy to shorten the time required for supply compared to the case of supplying power from a single power supply source.

  In the power system 2, when the first power device 30a receives power from the first mobile body EV1 and the second power device 30b supplies power to the second mobile body EV2, the control device 40 You may control to supply the electric power received from 1 mobile body EV1 to 2nd mobile body EV2 from the 1st electric power apparatus 30a via the 2nd electric power apparatus 30b. In this manner, also in the power system 2 according to the present embodiment, when there is the first mobile EV1 that performs discharge and the second mobile EV2 that performs charging, the control device 40 performs the first operation. The DC power received by the first power unit 30a from the mobile unit EV1 is fed from the second power unit 30b to the second mobile unit EV2. Therefore, even with the power system 2, power loss due to conversion does not occur as compared with the case where conversion between DC power and AC power is performed. In this way, according to the power system 2, the energy can be used more efficiently, thereby improving the usefulness.

  In the power system 2, the power generation device 10 has been described as being connected between the commercial power source and the AC / DC conversion device 90. However, the power system 2 may not necessarily include the power generation device 10. In the case where the power system 2 does not include the power generation device 10, for example, the power generation device 10 may be retrofitted by an administrator of the power system 2.

(Configuration of Power System According to Third Embodiment)
FIG. 13 is a diagram illustrating an example of connection of each functional unit in the power system 3 according to the third embodiment. The power system 3 according to the third embodiment will be described with reference to FIG. In addition, about the content which is common in 1st Embodiment, description is abbreviate | omitted suitably.

  In the power system 3 according to the present embodiment, the power generation device 10, the first power device 30 a, the second power device 30 b, and the power storage device 20 are connected by a DC power transmission line 80. That is, in the power system 3, the power generation device 10, the first power device 30a, the second power device 30b, and the power storage device 20 can mutually transmit and receive direct current power. The power generation device 10 in the power system 3 may not include the DC / AC conversion unit 16. The first power device 30 a and the second power device 30 b in the power system 3 may not include the AC / DC conversion unit 37 and the DC / AC conversion unit 38. In the present embodiment, the power generation device 10 is communicably connected to the control device 40. Therefore, the power generation device 10 may be controlled based on the control signal from the control device 40.

  The DC transmission line 80 is connected via the AC / DC conversion device 90 to a commercial power source to which power is transmitted / received by AC power. The AC / DC converter 90 converts AC power supplied from a commercial power source into DC power and supplies power to the DC transmission line 80. The AC / DC converter 90 is communicably connected to the controller 40. Therefore, the AC / DC conversion device 90 may be controlled based on the control signal from the controller 40. The power system 3 may include a DC / AC conversion device for converting DC power into AC power between the DC transmission line 80 and a commercial power source. For example, when the DC power flowing through the DC transmission line 80 is reversely flowed to the commercial power source side, the DC power is converted into AC power by the DC / AC conversion device.

  In the power system 3, for example, when the control device 40 receives an input for executing power reception from the first mobile body EV1, the control device 40 receives the power received by the first power device 30a from the first mobile body EV1. It may be transmitted to the commercial power source side via the storage device 20 or the AC transmission line 70. In the power system 3, for example, when the control device 40 receives an input for executing power feeding to the second moving body EV <b> 2, the power storage device 20 or the AC power transmission line 70 through the second power device 30 b. Power may be supplied to the second mobile unit EV2. When power is supplied from the AC transmission line 70, power is supplied from a commercial power source.

  In the power system 3, for example, the control device 40 receives the amount of power received from the first mobile body EV1 connected to the first power device 30a and the second mobile body EV2 connected to the second power device 30b. Compare the planned power supply amount. As a result of the comparison, when the scheduled power supply amount is equal to or greater than the power reception amount, the control device 40 may perform control so that the entire amount of power received from the first mobile body EV1 is supplied to the second mobile body EV2. In this case, the control device 40 may further control the power generated by the power generation device 10 and / or the power stored in the power storage device 20 to be supplied to the second mobile body EV2. Even if the amount of power received from the first moving body EV1 and the amount of power generated by the power generation device 10 and / or the amount of power stored in the power storage device 20 are supplied to the second moving body EV2, the second moving body If the planned power supply amount of EV2 is not reached, the control device 40 may further supply power to the second mobile unit EV2 from the AC power transmission line 70 side. As described above, by supplying power from the plurality of power supply sources to the second mobile unit EV2, it becomes easy to satisfy the planned power supply amount of the second mobile unit EV2. In addition, by supplying power from the plurality of power supply sources to the second mobile EV 2 at the same time, it is easy to shorten the time required for supply compared to the case of supplying power from a single power supply source.

  For example, when the planned power supply amount is less than the power reception amount as a result of the comparison, the control device 40 may control the power received from the first mobile body EV1 to be supplied to the second mobile body EV2. In this case, the control device 40 does not need to supply the power generated by the power generation device 10 to the second mobile unit EV2, for example. Therefore, the control device 40 causes a reverse flow of power to the commercial power via the DC / AC conversion device. Also good.

  In the power system 3, when the first power device 30a receives power from the first mobile body EV1 and the second power device 30b supplies power to the second mobile body EV2, the control device 40 You may control to supply the electric power received from 1 mobile body EV1 to 2nd mobile body EV2 from the 1st electric power apparatus 30a via the 2nd electric power apparatus 30b. As described above, also in the power system 3 according to the present embodiment, when there is the first mobile EV1 that performs discharge and the second mobile EV2 that performs charging, the control device 40 performs the first operation. The DC power received by the first power unit 30a from the mobile unit EV1 is fed from the second power unit 30b to the second mobile unit EV2. For this reason, the power system 3 does not cause power loss due to the conversion as compared with the case of converting the DC power and the AC power. In this manner, according to the power system 3, the energy can be used more efficiently, so the usefulness is improved.

  In the power system 3, since the power generation device 10 is connected to the DC power transmission line 80, the power generated by the power generation device 10 is supplied from the power device 30 to the moving body as DC power. Therefore, compared with the case where the electric power generated by the power generation apparatus 10 is converted from AC power to DC power, power loss due to conversion does not occur. Therefore, according to the power system 3, since the energy can be used more efficiently, the usefulness is improved.

  Further, in the power system 3, the power generation device 10 is connected to the DC power transmission line 80 and is not connected to the AC power transmission line. Therefore, since a mechanism such as a DC / AC converter, which is necessary when connecting the power generation device 10 to the AC power transmission line, is not necessary, the structure of the power generation device 10 in the power system 3 can be easily simplified.

(Configuration of Power System According to Fourth Embodiment)
FIG. 14 is a diagram showing a schematic configuration of a power system 4 according to the fourth embodiment. FIG. 15 is a diagram showing an example of connection of each functional unit in the power system 4. A power system 4 according to a fourth embodiment will be described with reference to FIGS. 14 and 15. In addition, about the content which is common in 1st Embodiment, description is abbreviate | omitted suitably.

  As shown in FIG. 14, the power system 4 includes a first power generation device 10 a and a second power generation device 10 b. In the example illustrated in FIG. 14, the first power generation device 10 a and the second power generation device 10 b are disposed above the first parking space Sa and the second parking space Sb, respectively. The number of power generation devices included in the power system 4 is not limited to two. The electric power system 4 should just be provided with the some electric power generating apparatus.

  In the power system 4 according to the present embodiment, the first power generation device 10a, the second power generation device 10b, the first power device 30a, the second power device 30b, and the power storage device 20 The wires 80 are connected. That is, in power system 4, first power generation device 10a, second power generation device 10b, first power device 30a, second power device 30b, and power storage device 20 mutually transmit DC power. Power can be received. The first power device 30 a and the second power device 30 b in the power system 3 may not include the AC / DC conversion unit 37 and the DC / AC conversion unit 38. In this embodiment, the 1st electric power generating apparatus 10a and the 2nd electric power generating apparatus 10b are connected so that communication with the control apparatus 40 is possible. Therefore, the first power generation device 10a and the second power generation device 10b may be controlled based on the control signal from the control device 40.

  The configuration of the power system 4 according to the present embodiment is common to the power system 3 according to the third embodiment, except that a plurality of power generation devices are provided. Therefore, the control related to the power transmission in the power system 4 is the same as the control related to the power transmission in the power system 3 except that power can be supplied from a plurality of power generators. In the power system 4, a plurality of power generation devices are connected in parallel to the DC transmission line 80. Therefore, power can be transmitted from any of the plurality of power generation devices to any power device 30 connected to the DC transmission line 80.

  The power system 4 can also use energy more efficiently for the same reason as that described in the third embodiment, thereby improving the usefulness. Further, the power system 4 can also simplify the structure of the plurality of power generation devices in the power system 4 for the same reason as that described in the third embodiment. Further, since power system 4 includes a plurality of power generation devices provided independently of each other, the power generation system as a whole of the power generation device due to environmental factors in the outside world and the like compared to the case where the power system includes one power generation device. It becomes easy to suppress a decrease in output. That is, when the power system includes only one power generation device, it is assumed that, for example, a part of the power generation device is covered by the shade. When the power generation device has a configuration in which the backflow prevention diode is not provided, the power generation device as a whole tries to output the same power as the whole according to the lowest output. Then, the output of the entire power generation device is reduced. Further, even when the power generation device has a configuration in which a backflow prevention diode is provided, the overall output is reduced if the shade is applied so as to cover a part of all the strings. On the other hand, when a plurality of power generation devices are arranged as in the present embodiment, even if some of the plurality of power generation devices are covered by the shade, the output of the power generation device that is not covered by other shades Is not affected by the shaded generator set. Also, the distributed locations reduce the probability that each string will be covered in the same shade. Therefore, it becomes easy to suppress the output fall as the whole power generation apparatus.

  Although the present disclosure has been described based on the drawings and embodiments, it should be noted that those skilled in the art can easily make various variations and modifications based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present disclosure. For example, the functions or the like included in each means or each step can be rearranged so as not to be logically contradictory. It is possible to combine or divide a plurality of means or steps into one.

  For example, a plurality of components of the power system according to the above-described embodiment may be integrated into one device. One of the components of the power system may be divided into multiple devices.

  In the above-described embodiment, the configuration in which the power device 30 is connected to the moving body via the communication unit 31 and power is supplied to the moving body and the power is received from the moving body has been described. In other embodiments, it is also possible that the power supply to the mobile unit and the power reception from the mobile unit are performed contactlessly by using, for example, any technology related to wireless power transmission.

  In the embodiment described above, it has been described that the power device 30 performs power feeding and power reception as a moving object. However, the power device 30 can target any device capable of storing power to perform power supply and power reception. For example, the power device 30 can supply or receive power to a portable storage battery unit connected to the power device 30 so as to be capable of transmitting and receiving power. The said storage battery unit may be mounted, for example in a mobile body.

1, 2, 3, 4 power system 10 power generation apparatus 10a first power generation apparatus 10b second power generation apparatus 11 power generation section 12 output section 13, 32, 42 sensor section 14, 34, 44 control section 15, 36 DC / DC Converter 16, 38 DC / AC converter 20 Power storage device 30a First power device 30b Second power device 30c Third power device 31, 41 Communication unit 33, 43 Storage unit 35 Input / output unit 37 AC / DC conversion Part 40 Control device 45 Input part 46 Display part 50a First delivery restriction device 50b Second delivery restriction device 60 Display device 70 AC transmission line 80 DC transmission line 90 AC / DC conversion device EV1 First mobile EV2 Second Mobile EV3 Third Mobile Sa First Parking Space Sb Second Parking Space

Claims (12)

A first power unit and a second power unit capable of transmitting and receiving power with a mobile body capable of storing power;
A control device for controlling power supply and power reception by the power device to the moving body;
With
The control device is connected so that the first power device can receive power from the first mobile body performing discharge, and the second power device can transmit power to the second mobile body performing charging. When connected, the first power device is controlled to supply DC power received from the first moving body to the second moving body.
Power system.   The power system according to claim 1, wherein the first power device and the second power device are connected by a DC power transmission line. The first power device and the second power device are configured to be connectable to an AC transmission line,
The power system according to claim 2, wherein the control device switches a power transmission path between the DC power transmission line and the AC power transmission line. The first power device and the second power device are configured to be connectable to an AC transmission line,
The power system according to claim 2, wherein the control device determines a power transmission path by executing and releasing restriction of power transmitted in the DC power transmission line and the AC power transmission line.   The control device receives an input of information related to power reception from a first mobile body, and causes the first power device to receive power of an amount of power corresponding to the information related to the power reception. The electric power system as described in any one of.   The power system according to claim 5, wherein the information related to power reception includes at least one of a power reception time, a power reception amount, and a power reception amount.   The said control apparatus is provided with the display part which displays information, and when inputting the information regarding the said call | power receiving, the information which supports the input of the information regarding the said call | power reception is displayed on the said display part. Power system.   The power system according to claim 2, further comprising a power generation device connected to the DC power transmission line.   The power system according to claim 8, comprising a plurality of the power generation devices.   The power system according to claim 9, wherein the plurality of power generation devices are connected in parallel to the DC power transmission line.   A power unit capable of transmitting power or receiving power with a movable body capable of storing power, which is capable of transmitting power to a mobile body to be charged, and capable of receiving power by another power unit When there is another connected mobile body that discharges, the power device supplies the mobile body with DC power received from the other mobile body by the other power device. A control method of an electric power system, comprising: a first electric power device and a second electric power device capable of transmitting and receiving electric power to and from a mobile body capable of storing electric power; and a control device,
When the first power unit is connected to be able to receive power from the first moving body to be discharged, and the second power unit is connected to be able to transmit power to the second moving body to be charged The control device controls the DC power received from the first moving body by the first power device to supply power to the second moving body;
A method for controlling an electric power system.

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