Charging / discharging system and method for controlling the charging / discharging system

Abstract

To provide a charging / discharging system capable of easily understanding the exchange of power, and a method for controlling a charging / discharging system.SOLUTION: Provided is a charging / discharging system which, in a predetermined supply area where power is supplied from a power system, performs charging / discharging between a vehicle power storage device and the charging / discharging system and supplies power to power loads. The charging / discharging system includes: an acquisition unit 161 that acquires system power information 164a and vehicle power information 164b; a generation unit 162 that generates display data for displaying, on a display device 41, a screen including area information 164e indicating the supply area, system information 164f indicating the power system, vehicle power storage device information 164g indicating the vehicle power storage device, a system current direction diagram 164i that is a diagram indicating a direction of current of power indicated by the system power information, a vehicle current direction diagram 164j that is a diagram indicating a direction of current of power indicated by the vehicle power information, and load information 164d indicating the power consumption state of the power loads; and a transmission unit 163 that transmits the display data to the display device.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a charge / discharge system that charges and discharges between a vehicle power storage device, which is a power storage device provided in a vehicle, and a control method for the charge / discharge system. [Background technology]

[0002] Patent Document 1 discloses a grid-connected system (charging and discharging system) that receives power from a power grid, charges and discharges the power between the grid and a battery (vehicle power storage device) mounted on an electric vehicle, and supplies the power to an electric load. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-10442 Summary of the Invention [Problem to be solved by the invention]

[0004] In a conventional charging / discharging system such as that disclosed in Patent Document 1, power is exchanged between the power grid, the vehicle power storage device, and the power load, and it can be difficult to grasp the power exchange. Therefore, it is desirable to be able to easily grasp the power exchange in the charging / discharging system.

[0005] An object of the present invention is to provide a charge / discharge system that allows easy understanding of power exchange, and a control method for the charge / discharge system. [Means for solving the problem]

[0006] A charging / discharging system according to one aspect of the present invention is a charging / discharging system that charges and discharges power between a vehicle power storage device, which is a power storage device possessed by a vehicle, in a predetermined supply area to which power is supplied from a power grid, and supplies power to a power load within the supply area, and includes: an acquisition unit that acquires system power information indicating the power flowing between the power grid and the charging / discharging system, and vehicle power information indicating the power charged and discharged between the vehicle power storage device and the charging / discharging system; a generation unit that generates display data for displaying on a display device a screen including area information indicating the supply area, system information indicating the power grid, vehicle power storage device information indicating the vehicle power storage device, a system current direction graphic that is a graphic indicating the direction of the current of the power indicated in the system power information, a vehicle current direction graphic that is a graphic indicating the direction of the current of the power indicated in the vehicle power information, and load information indicating the power consumption state of the power load; and a transmission unit that transmits the display data to the display device.

[0007] The present invention can be realized not only as such a charge / discharge system, but also as a control method for a charge / discharge system. The present invention can also be realized as a program for causing a computer to execute the processes included in the control method for a charge / discharge system, and as a computer-readable recording medium such as a CD-ROM on which the program is recorded. The program can be distributed via the recording medium and a transmission medium such as the Internet. The present invention can also be realized as an integrated circuit having a processing unit included in the charge / discharge system. [Effects of the Invention]

[0008] According to the charge / discharge system etc. of the present invention, the exchange of power can be easily grasped. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram showing an overview of a remote monitoring system including a charge / discharge system according to an embodiment; [Figure 2] 1 is a perspective view showing a configuration of a charge / discharge system according to an embodiment. [Figure 3] 1 is a block diagram showing a functional configuration of a charge / discharge system according to an embodiment; [Figure 4] FIG. 2 is a block diagram showing a functional configuration of a first communication unit according to the embodiment. [Figure 5] FIG. 4 is a diagram illustrating an example of display data displayed on the display device according to the embodiment. [Figure 6] 3 is a flowchart showing a process (a control method for the charge / discharge system) performed by the charge / discharge system according to the embodiment. [Figure 7] 10 is a flowchart illustrating a process in which a generating unit of a first communication unit generates display data according to the embodiment. [Figure 8] 10 is a flowchart illustrating a power availability determination process performed by a generation unit according to an embodiment. [Figure 9] 10A and 10B are diagrams illustrating an example of display data generated by a generation unit according to an embodiment performing a power presence / absence determination process. [Figure 10] 10 is a flowchart illustrating a connection existence determination process performed by a generation unit according to an embodiment. [Figure 11] 10A and 10B are diagrams illustrating an example of display data generated by a generation unit according to an embodiment performing a connection presence / absence determination process. [Figure 12] 10 is a flowchart illustrating a selection information acquisition process performed by a generation unit according to an embodiment. [Figure 13] 10A and 10B are diagrams illustrating an example of display data generated by a generation unit according to an embodiment by performing a selection information acquisition process. [Figure 14A] FIG. 10 is a diagram showing an example of display data displayed on the display device according to the first modification of the embodiment. [Figure 14B] FIG. 10 is a diagram showing an example of display data displayed on the display device according to the first modification of the embodiment. [Figure 15] FIG. 10 is a diagram showing an example of display data displayed on a display device according to a second modification of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] A charging / discharging system according to one aspect of the present invention is a charging / discharging system that charges and discharges power between a vehicle power storage device, which is a power storage device possessed by a vehicle, in a predetermined supply area to which power is supplied from a power grid, and supplies power to a power load within the supply area, and includes: an acquisition unit that acquires system power information indicating the power flowing between the power grid and the charging / discharging system, and vehicle power information indicating the power charged and discharged between the vehicle power storage device and the charging / discharging system; a generation unit that generates display data for displaying on a display device a screen including area information indicating the supply area, system information indicating the power grid, vehicle power storage device information indicating the vehicle power storage device, a system current direction graphic that is a graphic indicating the direction of the current of the power indicated in the system power information, a vehicle current direction graphic that is a graphic indicating the direction of the current of the power indicated in the vehicle power information, and load information indicating the power consumption state of the power load; and a transmission unit that transmits the display data to the display device.

[0011] According to this, the charging / discharging system generates display data for displaying on the display device a screen including area information, grid information, vehicle power storage device information, a grid current direction graphic, a vehicle current direction graphic, and load information, and transmits the display data to the display device. That is, the charging / discharging system transmits to the display device display data for a screen including information indicating the supply area, the power grid, the vehicle power storage device, and the power load, and a graphic indicating the direction of power current between the power grid and the vehicle power storage device. The graphic indicating the direction of power current between the charging / discharging system and the power grid (grid current direction graphic) makes it easy to intuitively understand the exchange of power between the charging / discharging system and the power grid (power purchase or power sale). The graphic indicating the direction of power current between the charging / discharging system and the vehicle power storage device (vehicle current direction graphic) makes it easy to intuitively understand the exchange of power between the charging / discharging system and the vehicle power storage device (charging or discharging). Therefore, the exchange of power between the charging / discharging system, the power grid, and the vehicle power storage device in the target supply area can be displayed graphically on the screen of the display device, making it easy to understand the exchange of power in the charging / discharging system.

[0012] The generation unit may determine at least one of whether the power indicated by the grid power information is 0 or not and whether the power indicated by the vehicle power information is 0 or not. If it determines that the power indicated by the grid power information is 0, the generation unit may generate the display data for causing the display device to display a screen including the grid current direction graphic that is different from a screen when the power is not 0, or a screen that does not include the grid current direction graphic. If it determines that the power indicated by the vehicle power information is 0, the generation unit may generate the display data for causing the display device to display a screen including the vehicle current direction graphic that is different from a screen when the power is not 0, or a screen that does not include the vehicle current direction graphic.

[0013] According to this, when the charging / discharging system determines that the power of at least one of the grid power information and the vehicle power information is zero, it generates display data for causing the display device to display a screen including a graphic different from that used when the power is not zero, or a screen including no graphic. In other words, when the charging / discharging system is not exchanging power with at least one of the power grid and the vehicle power storage device, it generates display data for causing the display device to display a screen indicating that no power is being exchanged. If it is determined that no power is being exchanged between the charging / discharging system and the power grid, it is possible to determine that the supply of power from the power grid to the charging / discharging system has been stopped due to a power outage or the like. If it is determined that no power is being exchanged between the charging / discharging system and the vehicle power storage device, it is possible to determine that charging / discharging between the charging / discharging system and the vehicle power storage device has been stopped due to the vehicle power storage device being fully charged or an equipment failure or the like. Therefore, it is possible to display a screen on the display device that allows intuitive understanding that the supply of power from the power grid to the charging / discharging system has been stopped or that charging / discharging between the charging / discharging system and the vehicle power storage device has been stopped. This makes it easy to understand the exchange of power in the charging / discharging system.

[0014] The generation unit may generate the display data for causing the display device to display a screen in which the system information and the system current direction diagram are located above the area information, and the vehicle power storage device information, the vehicle current direction diagram, and the load information are located below the area information.

[0015] According to this, the charge / discharge system generates display data for displaying on the display device a screen in which information and graphics about the power grid are positioned above area information and information and graphics about the vehicle power storage device and power load are positioned below the area information. This allows the information and graphics about the power grid (grid information and grid current direction graphic) and the information and graphics about the vehicle power storage device and power load (vehicle power storage device information, vehicle current direction graphic, and load information) to be displayed separately in intuitively easy-to-understand positions on the screen of the display device. This makes it easy to understand the exchange of power in the charge / discharge system.

[0016] The generation unit may determine whether or not the vehicle power storage device is connected to the charging / discharging system, and if it determines that the vehicle power storage device is not connected to the charging / discharging system, generate the display data for causing the display device to display a screen including the vehicle power storage device information that is different from a screen that is displayed when it is determined that the vehicle power storage device is connected to the charging / discharging system, or a screen that does not include the vehicle power storage device information.

[0017] According to this, when the charging / discharging system determines that the vehicle power storage device is not connected to the charging / discharging system, it generates display data for a screen including vehicle power storage device information different from that when it is determined that the vehicle power storage device is connected, or a screen not including that information. In other words, when the vehicle power storage device is not connected to the charging / discharging system, the charging / discharging system generates display data for causing the display device to display a screen indicating that the vehicle power storage device is not connected. This makes it possible to display the connection status of the vehicle power storage device to the charging / discharging system on the screen of the display device, making it easy to intuitively understand that even if charging / discharging between the charging / discharging system and the vehicle power storage device has stopped, this is not due to a malfunction of the equipment, for example. Therefore, it is easy to understand the exchange of power in the charging / discharging system.

[0018] A plurality of the vehicle power storage devices are connected to the charging / discharging system, and the acquisition unit is configured to be able to acquire vehicle selection information indicating that the vehicle power storage device information or the vehicle current direction graphic displayed on the display device has been selected, and when the acquisition unit has not acquired the vehicle selection information, the generation unit may regard the plurality of vehicle power storage devices as a single vehicle power storage device and generate the display data for displaying a screen including the vehicle power storage device information and the vehicle current direction graphic on the display device, and when the acquisition unit has acquired the vehicle selection information, generate the display data for displaying a screen including the vehicle power storage device information and the vehicle current direction graphic for each of the plurality of vehicle power storage devices on the display device.

[0019] According to this, when the charging / discharging system acquires the vehicle selection information, it generates screen display data including vehicle power storage device information and a vehicle current direction graphic for each of the multiple vehicle power storage devices. As a result, when multiple vehicle power storage devices are connected to the charging / discharging system, the information and graphic for each of the multiple vehicle power storage devices can be displayed on the screen of the display device, making it easy to intuitively understand the status of the multiple vehicle power storage devices. Therefore, even when multiple vehicle power storage devices are connected to the charging / discharging system, it is easy to understand the exchange of power in the charging / discharging system for each of the multiple vehicle power storage devices.

[0020] At least one of a power generation device and a power storage device is connected to the charging / discharging system, and the acquisition unit acquires device power information indicating the power flowing between at least one of the power generation device and the power storage device and the charging / discharging system, and the generation unit may generate the display data for displaying on the display device a screen further including device information indicating at least one of the power generation device and the power storage device and a device current direction figure which is a figure indicating the direction of the current of the power indicated by the device power information.

[0021] According to this, the charging / discharging system generates display data for displaying on a display device a screen further including device information and a device current direction graphic. That is, the charging / discharging system generates display data for a screen further including information indicating at least one of a power generation device and a power storage device and a graphic indicating the direction of electric current flowing between the at least one of the power generation device and the power storage device and the charging / discharging system. This makes it possible to graphically display the exchange of electric power between the charging / discharging system and at least one of the power generation device and the power storage device on the screen of the display device, even when at least one of a power generation device and a power storage device is connected to the charging / discharging system. Therefore, the exchange of electric power between the charging / discharging system and at least one of the power generation device and the power storage device can be intuitively understood, making it easy to understand the exchange of electric power in the charging / discharging system.

[0022] A plurality of the power generation devices or a plurality of the storage devices are connected to the charging / discharging system, and the acquisition unit is configured to be able to acquire device selection information indicating that the device information or the device current direction diagram displayed on the display device has been selected. When the acquisition unit has not acquired the device selection information, the generation unit may regard the plurality of the power generation devices or the plurality of the storage devices as a single power generation device or a single storage device, and generate the display data for displaying a screen including the device information and the device current direction diagram on the display device, and when the acquisition unit has acquired the device selection information, may generate the display data for displaying a screen including the device information and the device current direction diagram for each of the plurality of the power generation devices or the plurality of the storage devices on the display device.

[0023] According to this, when the charge / discharge system acquires the device selection information, it generates screen display data including device information and a device current direction diagram for each of the multiple power generation devices or multiple power storage devices. As a result, when multiple power generation devices or multiple power storage devices are connected to the charge / discharge system, the information and diagram for each of the multiple power generation devices or multiple power storage devices can be displayed on the screen of the display device. Therefore, even when multiple power generation devices or multiple power storage devices are connected to the charge / discharge system, it is easy to intuitively grasp the status of the multiple power generation devices or multiple power storage devices, and therefore it is easy to understand the exchange of power in the charge / discharge system.

[0024] Hereinafter, with reference to the drawings, a charge / discharge system according to an embodiment of the present invention (including its modified examples), and a control method for the charge / discharge system will be described. The embodiments described below all show comprehensive or specific examples. The numerical values, components, the arrangement and connection of the components, the control processes, and the order of the control processes shown in the following embodiments are examples and are not intended to limit the present invention. Each drawing is a schematic diagram and is not necessarily an exact illustration. In each drawing, the same or similar components are assigned the same reference numerals.

[0025] (Embodiment) [1 Explanation of charging and discharging system 10] First, a general description will be given of the charge / discharge system 10. Fig. 1 is a diagram showing an outline of a remote monitoring system including a charge / discharge system 10 according to the present embodiment.

[0026] 1, the remote monitoring system includes a plurality of supply areas 1 (three in FIG. 1), a server device 30 capable of collecting information about the supply areas 1, a client device 40 capable of viewing the information about the supply areas 1, and a network N serving as a communication medium. This allows remote monitoring by displaying the information about the supply areas 1 on a display device 41 of the client device 40 via the network N (and the server device 30).

[0027] A supply area 1 is a predetermined site to which power is supplied from a power grid, and is divided into predetermined areas such as by consumer, facility, or building. In each supply area 1, a charge / discharge system 10 including a power conditioner 100 and a charger / discharger 200, and a power load 20 are arranged, and power is supplied from the charge / discharge system 10 to the power load 20. The power load 20 is a power load consumed by power consuming devices in buildings (offices, etc.) arranged in each supply area 1, or outdoor power consuming devices, etc.

[0028] The server device 30 includes a web server function and presents information obtained from the charging / discharging system 10 within the supply area 1 in response to access from the client device 40. The server device 30 may be realized by a general-purpose computer system such as a personal computer executing a program, or may be realized by a dedicated computer system.

[0029] The network N includes a public communication network N1, which is the Internet, and a carrier network N2 that realizes wireless communication according to a predetermined mobile communication standard. The public communication network N1 includes a general optical line, and the network N includes a dedicated line to which the server device 30 is connected. The carrier network N2 includes a base station BS, and the client device 40 can communicate with the server device 30 from the base station BS via the network N. An access point AP is connected to the public communication network N1, and the client device 40 can communicate with the server device 30 from the access point AP via the network N.

[0030] The client device 40 may be a desktop or laptop personal computer, or may be a so-called smartphone or tablet communication terminal. The client device 40 has a display device 41 such as a liquid crystal display, an input device 42 such as a keyboard and mouse or a touch panel, a control device, a storage unit (memory), a communication device, etc. The storage unit stores client programs including a web browser that are read and executed by the control device. A user who logs in using a login screen displayed on the web browser of the client device 40 can access information about the system in which the user is involved, which is provided by the server device 30.

[0031] Next, the charging / discharging system 10 will be described in detail. Fig. 2 is a perspective view showing the configuration of the charging / discharging system 10 according to this embodiment. Specifically, Fig. 2 is an image diagram showing the configurations of the power conditioner 100 and the charger / discharger 200 provided in the charging / discharging system 10, and a state in which the vehicle power storage device 51 of the vehicle 50 is connected to the charger / discharger 200. Fig. 3 is a block diagram showing the functional configuration of the charging / discharging system 10 according to this embodiment. Specifically, Fig. 3 shows a configuration in which the charging / discharging system 10 is connected to the vehicle power storage device 51 of the vehicle 50, the power grid 60, the power generation device 70, the power storage device 80, and the power load 20 within the supply area 1.

[0032] The charging / discharging system 10 is a system that charges / discharges power between a vehicle power storage device 51, which is a power storage device included in a vehicle 50, in a predetermined supply area 1 to which power is supplied from a power grid 60, and supplies the power to a power load 20 within the supply area 1. As shown in FIGS. 2 and 3, the charging / discharging system 10 includes a power conditioner 100 and a charger / discharger 200. Although five charger / dischargers 200 are illustrated in FIG. 2 and only one charger / discharger 200 is illustrated in FIG. 3 for ease of explanation, the number of charger / dischargers 200 included in the charging / discharging system 10 is not particularly limited. The number of power conditioners 100 included in the charging / discharging system 10 is also not particularly limited.

[0033] That is, the charging / discharging system 10 may be arranged in a centralized charging / discharging station in which parking spaces S1 to S5 are adjacent to each other, as shown in FIG. 2, or in a distributed charging / discharging station (not shown) in which parking spaces are distributed (for example, on different floors of a building). In FIG. 2, a charger / discharger 200 is arranged in each of the parking spaces (S1, S2, ...), but this is not limited to this configuration, and a single charger / discharger 200 may be installed in a single parking space. Multiple vehicles 50 (multiple vehicle power storage devices 51) may be connected to one charger / discharger 200. In other words, multiple vehicles 50 (multiple vehicle power storage devices 51) may be connected to the charging / discharging system 10, or only one vehicle 50 (one vehicle power storage device 51) may be connected. The charging / discharging station in which the charging / discharging system 10 is arranged may be provided in a public place such as a public parking lot, or may be provided on the premises of a company or individual.

[0034] 3, the power conditioner 100 is connected to the charger / discharger 200, the power system 60, the power generator 70, the power storage device 80, and the power load 20, and exchanges power with these. That is, the power conditioner 100 receives power from the charger / discharger 200, the power system 60, the power generator 70, and the power storage device 80, and supplies power to the charger / discharger 200, the power system 60, the power storage device 80, and the power load 20.

[0035] The power grid 60 is, for example, a commercial power grid owned by an electric power company, and AC power generated by a system power source 61 such as a thermal power plant flows through it. The power grid 60 supplies the AC power to the power conditioner 100. The power generation device 70 is a power generation device installed within the supply area 1, and may be a solar power generation facility, a wind power generation facility, a diesel generator, a small gas turbine generator, a fuel cell, a micro-hydroelectric generator, a distributed power generation facility such as a binary power generation facility, or the like. The power generation device 70 supplies the generated power to the power conditioner 100.

[0036] The power storage device 80 is a power supply device that can charge with electricity from an external source and discharge electricity to the outside. The power storage device 80 charges with and discharges power via the power conditioner 100. Specifically, the power storage device 80 has a plurality of power storage elements connected in series and / or parallel. The power storage elements are secondary batteries (single cells) that can charge with and discharge electricity, and are, for example, non-aqueous electrolyte secondary batteries such as lithium-ion secondary batteries. The power storage elements are not limited to non-aqueous electrolyte secondary batteries, and may be secondary batteries other than non-aqueous electrolyte secondary batteries, capacitors, primary batteries, batteries using a solid electrolyte, or the like.

[0037] The power load 20 is a power load consumed within the supply area 1, and includes specific loads 21 and 22 that are used even in emergencies such as power outages, and a general load 23 that is used normally. The specific load 21 is a power load used for elevators or commercial air conditioning in facilities such as offices, and the specific load 22 is a lighting load used for lighting or outlets in facilities such as offices. The general load 23 is a power load other than the specific loads 21 and 22, such as a load for operating home appliances or machinery in a factory.

[0038] The power conditioner 100 includes a first converter circuit 110, a second converter circuit 120, a bidirectional inverter circuit 130, a switching circuit 140, a control unit 150, and a first communication unit 160.

[0039] The first converter circuit 110 is a power converter (DC / DC converter) that performs conversion between DC and DC power, and is connected to the power generation device 70 to boost and output the output voltage (DC) of the power generation device 70. The first converter circuit 110 may be a boost chopper. The second converter circuit 120 is a bidirectional power converter (bidirectional DC / DC converter) that performs conversion between DC and DC power, and is connected to the power storage device 80 to discharge and charge the power storage device 80. The second converter circuit 120 may be a bidirectional chopper. The power storage device 80 can store surplus power from the power generation device 70 and power from the power grid 60 via the second converter circuit 120. When the amount of power generated by the power generation device 70 is insufficient, the power storage device 80 can discharge and make up for the shortage of power generation via the second converter circuit 120. The bidirectional inverter circuit 130 is a bidirectional conversion circuit that selectively performs inverse conversion (inversion) to convert DC power to AC power and forward conversion (conversion) to convert AC power to DC power. The bidirectional inverter circuit 130 is connected to the first converter circuit 110, the second converter circuit 120, and the power grid 60.

[0040] The switching circuit 140 is connected to a three-phase specific load 21 and a single-phase specific load 22 via a transformer, and is a circuit that switches contacts to supply power to the specific loads 21 and 22 in an emergency such as a power outage in the power grid 60. The switching circuit 140 is configured to normally connect contact A to the power line so that power from the power grid 60 can be supplied to the specific loads 21 and 22, etc. In an emergency, the switching circuit 140 switches to contact B so that power can be supplied from the power generation device 70 and / or the power storage device 80 to the specific loads 21 and 22 via the bidirectional inverter circuit 130. As a result, backup power is supplied to the specific loads 21 and 22 from at least one of the power generation device 70, the power storage device 80, and the charger / discharger 200 in the event of a power outage in the power grid 60.

[0041] The control unit 150 is a control device that controls various devices within the power conditioner 100. The power conditioner 100 further includes a current detection unit and a voltage detection unit (not shown). The current detection unit is, for example, a through-hole sensor that detects the current flowing through the power line within the power conditioner 100. The voltage detection unit detects the voltage of the power line within the power conditioner 100. The control unit 150 has a function of calculating and acquiring the power (active power) and amount of power flowing in and out of the power line based on the detected current and voltage. The control unit 150 also has a function of calculating received power from the received current and system voltage detected by an external measuring device (external transducer) 62 installed at the power receiving point of the power grid 60, or acquiring the received power calculated by the external measuring device 62. In this way, the control unit 150 is configured to be able to acquire the power and amount of power of the current flowing between the charging / discharging system 10 and the power grid 60, the power generation device 70, the power storage device 80, and the power load 20. The control unit 150 may be configured to be able to acquire information other than the above, such as the SOC (State Of Charge) of the power storage device 80, and the power and amount of power of the current flowing between the power conditioner 100 and the charger / discharger 200.

[0042] The first communication unit 160 is a communication board such as a network interface card (NIC) and is capable of communicating with external devices. The first communication unit 160 is communicably connected to the control unit 150 via a communication line (not shown) and acquires information from the control unit 150. The first communication unit 160 is communicably connected to a second communication unit 230 of the charger / discharger 200 (described later) via a communication line or by wireless communication and acquires information from the second communication unit 230 as well. The first communication unit 160 generates display data using the acquired information and transmits it to the client device 40 (display device 41). The first communication unit 160 will be described in detail later.

[0043] The power conditioner 100 may be a three-phase grid-connected power storage system that can supply power to a wide range of power loads. For example, by using a so-called power conditioner with a storage battery that is integrally provided with the power storage device 80 as the power conditioner 100, space can be saved.

[0044] Charger / discharger 200 is a charging / discharging station that is connected to vehicle power storage device 51, which is a power storage device included in vehicle 50, and charges / discharges between vehicle power storage device 51 and charge / discharge station 200. Charger / discharger 200 is also connected to power load 20 via power conditioner 100, and charges vehicle power storage device 51 under normal circumstances, and discharges vehicle power storage device 51 under emergency circumstances to supply power to power load 20, such as specific loads 21 and 22.

[0045] Vehicle 50 is a vehicle (mobile object) such as an electric vehicle (EV) or a plug-in hybrid electric vehicle (PHEV), and vehicle power storage device 51 is a battery mounted thereon. Similar to power storage device 80, vehicle power storage device 51 has a plurality of power storage elements (lithium ion secondary batteries, etc.) connected in series and / or parallel.

[0046] The charger / discharger 200 includes a charge / discharge unit 210 , a control unit 220 , and a second communication unit 230 .

[0047] The charge / discharge unit 210 is a bidirectional conversion circuit that selectively performs forward conversion (conversion) to convert AC power to DC power and inverse conversion (inversion) to convert DC power to AC power. The charge / discharge unit 210 converts AC power from the power conditioner 100 into DC power and supplies it to the vehicle power storage device 51 to charge the vehicle power storage device 51. The charge / discharge unit 210 converts DC power discharged from the vehicle power storage device 51 into AC power and supplies it to the power load 20 etc. via the power conditioner 100.

[0048] The control unit 220 controls the charge / discharge unit 210 by issuing commands to the charge / discharge unit 210. The control unit 220 has a function of calculating (estimating) and acquiring the power and amount of power when the vehicle power storage device 51 is being charged and when it is being discharged, based on the output of the charge / discharge unit 210. The control unit 220 may also have a function of acquiring and monitoring the SOC of the vehicle power storage device 51. The control unit 220 may have a storage unit (memory), a display panel, an operation unit, etc.

[0049] The second communication unit 230 is a communication board such as a network interface card (NIC) that can communicate with the first communication unit 160 of the power conditioner 100 via a communication line or by wireless communication. The second communication unit 230 acquires various information from the control unit 220 and transmits it to the first communication unit 160. Specifically, the second communication unit 230 acquires, from the control unit 220, information on the power and amount of power charged and discharged between the vehicle power storage device 51 and the charge / discharge unit 210 (charge / discharge system 10), and transmits it to the first communication unit 160. In this way, in the present embodiment, the first communication unit 160 functions as a parent device, and the second communication unit 230 functions as a child device.

[0050] 2 , when a plurality of chargers / dischargers 200 are provided in the charging / discharging system 10, a plurality of second communication units 230 possessed by the plurality of chargers / dischargers 200 are configured to be able to communicate with the first communication unit 160, and information is transmitted from the plurality of second communication units 230 to the first communication unit 160. The second communication unit 230 may be configured to be able to communicate with other second communication units 230 possessed by other chargers / dischargers 200 via wire or wirelessly, and may be configured to acquire information from the other second communication units 230 and then transmit the information to the first communication unit 160.

[0051] [2. Description of the first communication unit 160] Next, the first communication unit 160 included in the power conditioner 100 of the charge / discharge system 10 will be described in detail. Fig. 4 is a block diagram showing the functional configuration of the first communication unit 160 according to this embodiment. Fig. 4 shows a configuration in which the first communication unit 160 acquires information from the control unit 150 and the second communication unit 230 and transmits the information to the client device 40 (display device 41). Fig. 5 is a diagram showing an example of display data 164l displayed on the display device 41 according to this embodiment. In Fig. 5, a monitor of a personal computer is shown as an example of the display device 41, but a touch panel of a smartphone or a tablet-type communication terminal may also be used.

[0052] As shown in FIG. 4, the first communication unit 160 includes an acquisition unit 161, a generation unit 162, a transmission unit 163, and a storage unit 164.

[0053] The acquisition unit 161 acquires various types of information such as grid power information 164a, vehicle power information 164b, and device power information 164c. The acquisition unit 161 acquires the grid power information 164a, device power information 164c, etc. from the control unit 150 of the power conditioner 100, and acquires the vehicle power information 164b, etc. from the second communication unit 230 of the charger / discharger 200. The acquisition unit 161 writes and stores the acquired various types of information such as the grid power information 164a, vehicle power information 164b, and device power information 164c in the storage unit 164.

[0054] The grid power information 164a is information indicating the power flowing between the power grid 60 and the charging / discharging system 10. The grid power information 164a includes information indicating the forward flow of power flowing from the power grid 60 to the charging / discharging system 10 (supply area 1), and information indicating the reverse flow of power flowing from the charging / discharging system 10 (supply area 1) to the power grid 60. In other words, the grid power information 164a includes information such as the magnitude of the power (power value) of the current flowing between the power grid 60 and the charging / discharging system 10, and the direction of the current flow (positive, negative, etc.).

[0055] Vehicle power information 164b is information indicating power charged and discharged between vehicle power storage device 51 and charging / discharging system 10. Vehicle power information 164b includes information indicating power charged to vehicle power storage device 51 from charging / discharging system 10, and information indicating power discharged from vehicle power storage device 51 to charging / discharging system 10. In other words, vehicle power information 164b includes information such as the magnitude of power (power value) of the current flowing between vehicle power storage device 51 and charging / discharging system 10 and the direction of the current flow (positive, negative, etc.).

[0056] The device power information 164c is information indicating the power flowing between at least one of the power generation device 70 and the power storage device 80 and the charging / discharging system 10. In the present embodiment, the device power information 164c is information indicating the power flowing between both the power generation device 70 and the power storage device 80 and the charging / discharging system 10. The device power information 164c includes information indicating the power generated by the power generation device 70 and supplied to the charging / discharging system 10, information indicating the power charged from the charging / discharging system 10 to the power storage device 80, and information indicating the power discharged from the power storage device 80 to the charging / discharging system 10. In other words, the device power information 164c includes information such as the magnitude of the power (power value) of the current flowing between both the power generation device 70 and the power storage device 80 and the charging / discharging system 10, and the direction of the current flow (positive, negative, etc.).

[0057] When a plurality of vehicle power storage devices 51 are connected to the charging / discharging system 10, the acquiring unit 161 is configured to be able to acquire vehicle selection information 41a. The vehicle selection information 41a is information indicating that the vehicle power storage device information 164g or the vehicle current direction graphic 164j displayed on the display device 41 of the client device 40 has been selected. In other words, when the user selects (e.g., clicks on) the vehicle power storage device information 164g or the vehicle current direction graphic 164j displayed on the display device 41 of the client device 40, the vehicle selection information 41a indicating the selection is transmitted from the client device 40 (display device 41) to the acquiring unit 161. The acquiring unit 161 acquires the vehicle selection information 41a transmitted from the client device 40 (display device 41).

[0058] When a plurality of power generation devices 70 or a plurality of power storage devices 80 are connected to the charging / discharging system 10, the acquiring unit 161 is configured to be able to acquire device selection information 41b. The device selection information 41b is information indicating that the device information 164h or the device current direction graphic 164k displayed on the display device 41 of the client device 40 has been selected. In other words, when the user selects (e.g., clicks on) the device information 164h or the device current direction graphic 164k displayed on the display device 41 of the client device 40, device selection information 41b indicating the selection is transmitted from the client device 40 (display device 41) to the acquiring unit 161. The acquiring unit 161 acquires the device selection information 41b transmitted from the client device 40 (display device 41).

[0059] 5, the generation unit 162 generates display data 164l for displaying on the display device 41 of the client device 40 a screen including various pieces of information. Specifically, the generation unit 162 generates display data 164l for displaying on the display device 41 a screen including area information 164e, grid information 164f, vehicle power storage device information 164g, grid current direction graphic 164i, vehicle current direction graphic 164j, and load information 164d. The generation unit 162 generates display data 164l for displaying on the display device 41 a screen further including device information 164h and device current direction graphic 164k. The generation unit 162 generates display data 164l for displaying on the display device 41 a screen further including information indicating the magnitude of power indicated by each of the grid power information 164a, vehicle power information 164b, device power information 164c, and load information 164d. The generating unit 162 generates screen display data 164l that further includes information indicating the solar radiation intensity and the temperature in the supply area 1.

[0060] The area information 164e is information indicating the supply area 1. The area information 164e is characters, symbols, graphics, etc. (characters in FIG. 5 ) that can identify the target supply area 1, such as District A Building B, District A Office C, or Company D. The system information 164f is information indicating the power system 60. The system information 164f is characters, symbols, graphics, etc. (graphics in FIG. 5 ) that can identify the power system 60. The vehicle power storage device information 164g is information indicating the vehicle power storage device 51. The vehicle power storage device information 164g is characters, symbols, graphics, etc. (graphics and the letters "EV" in FIG. 5 ) that can identify the vehicle power storage device 51. The device information 164h is information indicating at least one of the power generation device 70 and the power storage device 80. The device information 164h is characters, symbols, graphics, etc. that can identify the power generation device 70 and the power storage device 80. In FIG. 5, information indicating the power generation device 70 is indicated as device information 164h1 by a graphic and the characters "PV," and information indicating the power storage device 80 is indicated as device information 164h2 by a graphic and the characters "ESS."

[0061] The grid current direction graphic 164i is a graphic that indicates the direction of the current of the power indicated in the grid power information 164a. In Fig. 5, the grid current direction graphic 164i indicates the direction of the current of the forward flow of power flowing from the power grid 60 to the charging / discharging system 10 (supply area 1) by a graphic of an arrow pointing from the grid information 164f to the area information 164e. Information indicating the magnitude of the power indicated in the grid power information 164a shows the value (kW) of the power flowing from the power grid 60 to the charging / discharging system 10 (supply area 1).

[0062] Vehicle current direction graphic 164j is a graphic that indicates the direction of the electric power current indicated by vehicle power information 164b. In Fig. 5, vehicle current direction graphic 164j indicates the direction of the electric power current flowing (charging) from charging / discharging system 10 to vehicle power storage device 51 with a graphic arrow pointing from area information 164e to vehicle power storage device information 164g. Information indicating the magnitude of the electric power indicated by vehicle power information 164b shows the value (kW) of the electric power flowing (charging) from area information 164e to vehicle power storage device information 164g.

[0063] The device current direction graphic 164k is a graphic that indicates the direction of the electric power current indicated by the device power information 164c. In FIG. 5, the graphic that indicates the direction of the electric power current flowing between the power generation device 70 and the charging / discharging system 10 is designated as device current direction graphic 164k1, and the graphic that indicates the direction of the electric power current flowing between the power storage device 80 and the charging / discharging system 10 is designated as device current direction graphic 164k2. The device current direction graphic 164k1 indicates the direction of the electric power current flowing from the power generation device 70 to the charging / discharging system 10 with an arrow pointing from the device information 164h1 to the area information 164e. The device current direction graphic 164k2 indicates the direction of the electric power current flowing from the power storage device 80 to the charging / discharging system 10 with an arrow pointing from the device information 164h2 to the area information 164e. The information indicating the magnitude of the power indicated by the device power information 164c is the value (kW) of the power flowing (generated) from the power generation device 70 to the charging / discharging system 10, which is set as device power information 164c1. The value (kW) of the power flowing (discharged) from the power storage device 80 to the charging / discharging system 10 is set as device power information 164c2. The device power information 164c2 also includes the value (%) of the SOC of the power storage device 80.

[0064] The load information 164d is information indicating the power consumption state of the power load 20. In FIG. 5, information indicating the power load 20 (specific loads 21, 22 and general load 23) is designated as load information 164d1, a graphic indicating the direction of the power current flowing between the charging / discharging system 10 and the power load 20 is designated as load information 164d2, and information indicating the size of the power load 20 is designated as load information 164d3. The load information 164d1 is a character, symbol, graphic, or the like (in FIG. 5, a graphic and the character "load") that can be used to identify the power load 20. The load information 164d2 indicates the direction of the power current flowing from the charging / discharging system 10 to the power load 20 with a graphic arrow pointing from the area information 164e to the load information 164d1. The load information 164d1 is the value (kW) of power consumption of the power load 20.

[0065] The generation unit 162 generates display data 164l for causing the display device 41 to display a screen in which system information 164f and system current direction graphic 164i are positioned above area information 164e and vehicle power storage device information 164g, vehicle current direction graphic 164j, and load information 164d are positioned below area information 164e. The generation unit 162 generates display data 164l for causing the display device 41 to display a screen in which device information 164h and device current direction graphic 164k are positioned below area information 164e. The generation unit 162 generates display data 164l for a screen in which information indicating the magnitude of power indicated by system power information 164a is positioned above area information 164e and information indicating the magnitude of power indicated by vehicle power information 164b, device power information 164c, and load information 164d is positioned below area information 164e.

[0066] The generation unit 162 determines at least one of whether the power indicated by the grid power information 164a is 0 and whether the power indicated by the vehicle power information 164b is 0. If the generation unit 162 determines that the power indicated by the grid power information 164a is 0, the generation unit 162 generates display data 164l for causing the display device 41 to display a screen including a grid current direction graphic 164i that is different from a screen when the power is not 0, or a screen that does not include the grid current direction graphic 164i. If the generation unit 162 determines that the power indicated by the vehicle power information 164b is 0, the generation unit 162 generates display data 164l for causing the display device 41 to display a screen including a vehicle current direction graphic 164j that is different from a screen when the power is not 0, or a screen that does not include the vehicle current direction graphic 164j.

[0067] Generation unit 162 determines whether or not vehicle power storage device 51 is connected to charging / discharging system 10. When generation unit 162 determines that vehicle power storage device 51 is not connected to charging / discharging system 10, generation unit 162 generates display data 164l for causing display device 41 to display a screen including vehicle power storage device information 164g that is different from the screen when generation unit 162 determines that vehicle power storage device 51 is connected to charging / discharging system 10, or a screen that does not include vehicle power storage device information 164g.

[0068] When the acquisition unit 161 has not acquired the vehicle selection information 41a, the generation unit 162 regards the plurality of vehicle power storage devices 51 as one vehicle power storage device, and generates display data 164l for causing the display device 41 to display a screen including the vehicle power storage device information 164g and the vehicle current direction graphic 164j. When the acquisition unit 161 has acquired the vehicle selection information 41a, the generation unit 162 generates display data 164l for causing the display device 41 to display a screen including the vehicle power storage device information 164g and the vehicle current direction graphic 164j for each of the plurality of vehicle power storage devices 51.

[0069] When the acquisition unit 161 has not acquired the device selection information 41b, the generation unit 162 regards the multiple power generation devices 70 or the multiple power storage devices 80 as one power generation device or one power storage device, and generates display data 164l for causing the display device 41 to display a screen including the device information 164h and the device current direction graphic 164k. When the acquisition unit 161 has acquired the device selection information 41b, the generation unit 162 generates display data 164l for causing the display device 41 to display a screen including the device information 164h and the device current direction graphic 164k for each of the multiple power generation devices 70 or the multiple power storage devices 80.

[0070] The process by which the generation unit 162 generates the display data 164l will be described in detail later. Various pieces of information required for the generation unit 162 to generate the display data 164l are stored in the storage unit 164, and the generation unit 162 reads and acquires the information from the storage unit 164. The information may be stored in the storage unit 164 in advance, or information acquired by the acquisition unit 161 may be written and stored in the storage unit 164. The generation unit 162 may acquire information from a processing unit other than the storage unit 164 (such as an input from a user). The generation unit 162 writes the generated display data 164 into the storage unit 164 to store it.

[0071] The transmission unit 163 transmits the display data 164l to the display device 41. The transmission unit 163 reads and acquires the display data 164l generated by the generation unit 162 and stored in the storage unit 164 from the storage unit 164, and transmits the display data 164l to the client device 40 (display device 41). As a result, the display data 164l is displayed on the display device 41 of the client device 40, as shown in FIG.

[0072] The storage unit 164 is a memory that stores data acquired by the acquisition unit 161, data necessary for the generation unit 162 to generate the display data 164l, and the display data 164l generated by the generation unit 162. Specifically, the storage unit 164 stores grid power information 164a, vehicle power information 164b, device power information 164c, load information 164d, area information 164e, grid information 164f, vehicle power storage device information 164g, device information 164h, grid current direction graphic 164i, vehicle current direction graphic 164j, device current direction graphic 164k, and display data 164l. The storage unit 164 may also store data other than those described above, such as data generated by the generation unit 162 while the display data 164l is being generated. When any of these data is changed, the data is updated in the storage unit 164, or the data may be accumulated.

[0073] [3. Explanation of the processing flow of the charging / discharging system 10] Next, the process performed by the charge / discharge system 10 (the control method for the charge / discharge system 10) will be described. Fig. 6 is a flowchart showing the process performed by the charge / discharge system 10 according to this embodiment (the control method for the charge / discharge system). Fig. 6 shows the process performed by each processing unit of the first communication unit 160 included in the power conditioner 100 of the charge / discharge system 10.

[0074] 6, first, the acquisition unit 161 acquires various types of information such as grid power information 164a, vehicle power information 164b, and device power information 164c (S102). Details of the information acquired by the acquisition unit 161 are as described above, and therefore will not be described again.

[0075] Then, the generation unit 162 generates display data 164l using the information acquired by the acquisition unit 161, etc. (S104). The generation unit 162 generates display data 164l for displaying a screen including area information 164e, grid information 164f, vehicle power storage device information 164g, grid current direction graphic 164i, vehicle current direction graphic 164j, load information 164d, etc. on the display device 41. Details of each piece of information are as described above, and therefore will not be described again. A detailed description of the process by which the generation unit 162 generates the display data 164l will be given later.

[0076] Then, the transmitting unit 163 transmits the display data 164l generated by the generating unit 162 to the display device 41 of the client device 40 (S106).

[0077] Thereafter, when the acquisition unit 161 acquires the vehicle selection information 41a or the device selection information 41b, the generation unit 162 performs a selection information acquisition process (S108). The selection information acquisition process performed by the generation unit 162 will be described in detail later.

[0078] In this manner, the process (the method for controlling the charge / discharge system) performed by the charge / discharge system 10 (the first communication unit 160) is completed.

[0079] Next, the process (S104 in FIG. 6) of generating the display data 164l by the generation unit 162 will be described in detail. Fig. 7 is a flowchart showing the process of generating the display data 164l by the generation unit 162 of the first communication unit 160 according to the present embodiment.

[0080] The generating unit 162 generates display data 164l for displaying the following screen on the display device 41, as shown in FIG.

[0081] The generation unit 162 arranges the grid information 164f, the grid current direction graphic 164i, and the grid power information 164a (power value) above the area information 164e (at the top when the screen of the display device 41 is viewed upright) (S202). The generation unit 162 arranges this information in approximately the center of the area information 164e in the horizontal direction. The generation unit 162 arranges the grid information 164f and the grid current direction graphic 164i in this order so that they are aligned toward the area information 164e (downward), and to the left of the grid power information 164a (power value).

[0082] The generation unit 162 arranges the information below the area information 164e (at the bottom when the screen of the display device 41 is viewed upright) as follows (S204): The generation unit 162 arranges the vehicle current direction graphic 164j, the vehicle power storage device information 164g, and the vehicle power information 164b (power values) below the area information 164e so that they are lined up in this order from the area information 164e downward. The generation unit 162 arranges the device current direction graphic 164k (164k1, 164k2), the device information 164h (164h1, 164h2), and the device power information 164c (164c1, 164c2) (power values) below the area information 164e so that they are lined up in this order from the area information 164e downward. The generation unit 162 arranges the load information 164d, that is, load information 164d2 (arrow), load information 164d1 (graphic), and load information 164d3 (power value), below the area information 164e so as to line up in this order from the area information 164e downward. The generation unit 162 arranges the device information 164h1, device information 164h2, vehicle power storage device information 164g, and load information 164d1 so as to line up in this order from left to right.

[0083] The generation unit 162 performs a power presence / absence determination process (S206) to determine the presence / absence of power between the charge / discharge system 10 and generate the display data 164l. The power presence / absence determination process will be described in detail later.

[0084] The generating unit 162 performs a connection determination process (S208) to determine whether or not there is a connection to the charging / discharging system 10 and generate the display data 164l. The connection determination process will be described in detail later.

[0085] In this way, the process in which the generation unit 162 generates the display data 164l (S104 in FIG. 6) ends.

[0086] Next, the power presence / absence determination process (S206 in FIG. 7) performed by the generation unit 162 will be described in detail. Fig. 8 is a flowchart showing the power presence / absence determination process performed by the generation unit 162 according to this embodiment. Fig. 9 is a diagram showing an example of display data 164l generated by the generation unit 162 according to this embodiment performing the power presence / absence determination process.

[0087] 8, the generation unit 162 determines whether the power indicated by the grid power information 164a is 0 (S302). If the generation unit 162 determines that the power indicated by the grid power information 164a is 0 (YES in S302), the generation unit 162 generates display data 164l for causing the display device 41 to display a screen including a grid current direction graphic 164i that is different from a screen when the power is not 0, or a screen that does not include the grid current direction graphic 164i (S304). If the generation unit 162 determines that the power indicated by the grid power information 164a is not 0 (NO in S302), the generation unit 162 does not perform the above process (S304).

[0088] 9, the power value of the grid power information 164a is 0, so the generation unit 162 determines that the power indicated by the grid power information 164a is 0 and generates display data 164l so as not to display the grid current direction graphic 164i. In FIG. 9, the generation unit 162 may generate display data 164l so as to display a grid current direction graphic 164i (such as an X mark) that is different from the graphic (arrow) used when the power value of the grid power information 164a is not 0.

[0089] The generation unit 162 also determines whether the power indicated by the vehicle power information 164b is 0 (S306). If the generation unit 162 determines that the power indicated by the vehicle power information 164b is 0 (YES in S306), the generation unit 162 generates display data 164l for causing the display device 41 to display a screen including a vehicle current direction graphic 164j that is different from when the power is not 0, or a screen that does not include the vehicle current direction graphic 164j (S308). If the generation unit 162 determines that the power indicated by the vehicle power information 164b is not 0 (NO in S306), the generation unit 162 does not perform the above process (S308).

[0090] 9, when the power value of the vehicle power information 164b is 0, the generation unit 162 determines that the power indicated by the vehicle power information 164b is 0 and generates display data 164l so as not to display the vehicle current direction graphic 164j. The generation unit 162 may generate display data 164l so as to display a vehicle current direction graphic 164j (such as an X mark) that is different from the graphic (arrow) used when the power value of the vehicle power information 164b is not 0.

[0091] Similarly, the generating unit 162 may determine whether the power indicated by the device power information 164c1, the device power information 164c2, or the load information 164d3 is 0 or not, and perform the same processing as above.

[0092] In this way, the power availability determination process (S206 in FIG. 7) performed by the generation unit 162 ends.

[0093] Next, the connection presence / absence determination process (S208 in FIG. 7) performed by the generation unit 162 will be described in detail. Fig. 10 is a flowchart showing the connection presence / absence determination process performed by the generation unit 162 according to this embodiment. Fig. 11 is a diagram showing an example of display data 164l generated by the generation unit 162 according to this embodiment performing the connection presence / absence determination process.

[0094] 10, the generation unit 162 determines whether or not the vehicle power storage device 51 is connected to the charging / discharging system 10 (S402). When the generation unit 162 determines that the vehicle power storage device 51 is connected to the charging / discharging system 10 (YES in S402), the generation unit 162 generates display data 164l for displaying a screen including the vehicle power storage device information 164g on the display device 41 (S404).

[0095] When it is determined that the vehicle power storage device 51 is not connected to the charging / discharging system 10 (NO in S402), the generation unit 162 generates display data 164l for causing the display device 41 to display a screen including vehicle power storage device information 164g that is different from that when it is determined that the vehicle power storage device 51 is connected to the charging / discharging system 10, or a screen that does not include the vehicle power storage device information 164g (S406).

[0096] FIG. 11 illustrates a case where the vehicle power storage device 51 is not connected to the charging / discharging system 10. In this case, the generation unit 162 generates display data 164l for causing the display device 41 to display a screen including vehicle power storage device information 164g (vehicle shown in dotted lines) that is different from the graphic (vehicle shown in solid lines in FIG. 5 and the like) that is used when it is determined that the vehicle power storage device 51 is connected to the charging / discharging system 10. In FIG. 11, the generation unit 162 may generate display data 164l to display vehicle power storage device information 164g by marking the vehicle with an "X" or by changing the color of the vehicle instead of the dotted line, or may generate display data 164l so as not to display the vehicle power storage device information 164g. When the vehicle power storage device 51 is not connected to the charging / discharging system 10, the power indicated by the vehicle power information 164b becomes 0. Therefore, the generation unit 162 generates display data 164l by the above-described power presence / absence determination process so as not to display the vehicle current direction graphic 164j.

[0097] Similarly, the generation unit 162 may also determine whether the power generation device 70, the power storage device 80, or the power load 20 is connected to the charge / discharge system 10, and perform the same processing as above.

[0098] In this way, the connection existence determination process (S208 in FIG. 7) performed by the generation unit 162 ends.

[0099] Next, the selection information acquisition process (S108 in FIG. 6) performed by the generation unit 162 will be described in detail. Fig. 12 is a flowchart showing the selection information acquisition process performed by the generation unit 162 according to this embodiment. Fig. 13 is a diagram showing an example of display data 164l generated by the generation unit 162 according to this embodiment performing the selection information acquisition process.

[0100] 12, the generation unit 162 determines whether the acquisition unit 161 has acquired the vehicle selection information 41a (S502). When the user selects the vehicle power storage device information 164g or the vehicle current direction graphic 164j displayed on the display device 41 of the client device 40 by clicking or touching it via the input device 42, the vehicle selection information 41a is transmitted to the acquisition unit 161. When the acquisition unit 161 acquires the vehicle selection information 41a, the generation unit 162 determines that the acquisition unit 161 has acquired the vehicle selection information 41a.

[0101] When determining that the acquisition unit 161 has not acquired the vehicle selection information 41a (NO in S502), the generation unit 162 regards the multiple vehicle power storage devices 51 as one vehicle power storage device, and generates display data 164l for displaying a screen including vehicle power storage device information 164g and a vehicle current direction graphic 164j on the display device 41 (S504). As shown in Fig. 5, the generation unit 162 generates display data 164l for a screen including one piece of vehicle power storage device information 164g, one vehicle current direction graphic 164j, and one piece of vehicle power information 164b (power value).

[0102] When the generation unit 162 determines that the acquisition unit 161 has acquired the vehicle selection information 41a (YES in S502), the generation unit 162 generates display data 164l for causing the display device 41 to display a screen including vehicle power storage device information 164g and a vehicle current direction graphic 164j for each of the plurality of vehicle power storage devices 51 (S506). Fig. 13 shows an example in which three vehicle power storage devices 51 are connected to the charging / discharging system 10. In this case, the generation unit 162 generates display data 164l for a screen including three pieces of vehicle power storage device information 164g1-164g3, three vehicle current direction graphics 164j1-164j3, and three pieces of vehicle power information 164b1-164b3 for each of the three vehicle power storage devices 51.

[0103] Next, the generation unit 162 determines whether the acquisition unit 161 has acquired the device selection information 41b (S508). When the user selects the device information 164h or the device current direction graphic 164k displayed on the display device 41 of the client device 40 by clicking or touching it via the input device 42, the device selection information 41b is transmitted to the acquisition unit 161. When the acquisition unit 161 acquires the device selection information 41b, the generation unit 162 determines that the acquisition unit 161 has acquired the device selection information 41b.

[0104] If the generation unit 162 determines that the acquisition unit 161 has not acquired the device selection information 41b (NO in S508), the generation unit 162 regards the multiple power generation devices 70 or the multiple power storage devices 80 as one power generation device or one power storage device, and generates display data 164l for displaying a screen including device information 164h and a device current direction graphic 164k on the display device 41 (S510). The generation unit 162 generates display data 164l for a screen including one piece of device information 164h, one device current direction graphic 164k, and one piece of device power information 164c (power value), as shown in FIG.

[0105] When the generation unit 162 determines that the acquisition unit 161 has acquired the device selection information 41b (YES in S508), the generation unit 162 generates display data 164l for causing the display device 41 to display a screen including device information 164h and a device current direction graphic 164k for each of the multiple power generation devices 70 or the multiple power storage devices 80 (S512). It is assumed that multiple power generation devices 70 are connected to the charging / discharging system 10, and the device selection information 41b is information indicating that the device information 164h1 or the device current direction graphic 164k1 displayed on the display device 41 has been selected. In this case, the generation unit 162 generates display data 164l for a screen including multiple pieces of device information 164h1, multiple device current direction graphics 164k1, and multiple pieces of device power information 164c1 (power values) for each of the multiple power generation devices 70. The same applies when multiple storage devices 80 are connected to the charging / discharging system 10 and the device selection information 41b is information indicating that the device information 164h2 or the device current direction graphic 164k2 displayed on the display device 41 has been selected.

[0106] When a plurality of power loads 20 are connected to the charging / discharging system 10, the acquiring unit 161 may be configured to acquire information indicating that the load information 164d displayed on the display device 41 has been selected. In this case, the generating unit 162 can perform the same process as described above. When the charging / discharging system 10 includes a plurality of power conditioners 100, the acquiring unit 161 may be configured to acquire information indicating that information indicating the power conditioner 100 displayed on the display device 41 (such as the area information 164e) has been selected. In this case, if the acquiring unit 161 has not acquired the information, the generating unit 162 may treat the plurality of power conditioners 100 as a single power conditioner and cause the display device 41 to display various pieces of information and graphics. If the acquiring unit 161 has acquired the information, the generating unit 162 may cause the display device 41 to display various pieces of information and graphics for each of the plurality of power conditioners 100.

[0107] In this way, the selection information acquisition process (S108 in FIG. 6) performed by the generation unit 162 ends.

[0108] [4. Explanation of effects] As described above, the charge / discharge system 10 according to this embodiment generates display data 164l for displaying on the display device 41 a screen including the area information 164e, the grid information 164f, the vehicle power storage device information 164g, the grid current direction graphic 164i, the vehicle current direction graphic 164j, and the load information 164d, and transmits the display data 164l to the display device 41. That is, the charge / discharge system 10 transmits to the display device 41 display data 164l for a screen including information indicating the supply area 1, the power grid 60, the vehicle power storage device 51, and the power load 20, and a graphic indicating the direction of power current between the power grid 60 and the vehicle power storage device 51. The graphic indicating the direction of power current between the charge / discharge system 10 and the power grid 60 (grid current direction graphic 164i) makes it easy to intuitively understand the exchange of power (power purchase or power sale) between the charge / discharge system 10 and the power grid 60. The graphic (vehicle current direction graphic 164j) showing the direction of the electric current between the charging / discharging system 10 and the vehicle power storage device 51 makes it easy to intuitively understand the exchange of electric power (charging or discharging) between the charging / discharging system 10 and the vehicle power storage device 51. Therefore, the exchange of electric power between the charging / discharging system 10 and the power grid 60 and the vehicle power storage device 51 in the target supply area 1 can be displayed graphically on the screen of the display device 41, making it easy to understand the exchange of electric power in the charging / discharging system 10.

[0109] When the charging / discharging system 10 determines that the power of at least one of the grid power information 164a and the vehicle power information 164b is zero, the charging / discharging system 10 generates display data 164l for causing the display device 41 to display a screen including a graphic different from that used when the power is not zero, or a screen including no graphic. In other words, when the charging / discharging system 10 is not exchanging power between at least one of the power grid 60 and the vehicle power storage device 51, the charging / discharging system 10 generates display data 164l for causing the display device 41 to display a screen indicating that no power is being exchanged. If it is determined that no power is being exchanged between the charging / discharging system 10 and the power grid 60, it can be determined that the supply of power from the power grid 60 to the charging / discharging system 10 has been stopped due to a power outage or the like. If it is determined that no power is being exchanged between the charging / discharging system 10 and the vehicle power storage device 51, it can be determined that charging / discharging between the charging / discharging system 10 and the vehicle power storage device 51 has been stopped due to the vehicle power storage device 51 being fully charged or due to equipment failure or the like. Therefore, a screen can be displayed on the display device 41, which allows the user to intuitively understand that the supply of power from the power grid 60 to the charging / discharging system 10 has stopped or that charging / discharging has stopped between the charging / discharging system 10 and the vehicle power storage device 51. This allows the user to easily understand the exchange of power in the charging / discharging system 10.

[0110] The charging / discharging system 10 generates display data 164l for displaying on the display device 41 a screen in which information and graphics about the power grid 60 are positioned above the area information 164e and information and graphics about the vehicle power storage device 51 and the power load 20 are positioned below the area information 164e. This allows the information and graphics about the power grid 60 (system information 164f and grid current direction graphic 164i) and the information and graphics about the vehicle power storage device 51 and the power load 20 (vehicle power storage device information 164g, vehicle current direction graphic 164j, and load information 164d) to be displayed separately at intuitively easy-to-understand positions on the screen of the display device 41. This makes it possible to easily grasp the exchange of power in the charging / discharging system 10.

[0111] When the charging / discharging system 10 determines that the vehicle power storage device 51 is not connected to the charging / discharging system 10, the charging / discharging system 10 generates display data 164l for a screen including vehicle power storage device information 164g that is different from that used when the charging / discharging system 10 determines that the vehicle power storage device 51 is connected, or for a screen not including the information. In other words, when the vehicle power storage device 51 is not connected to the charging / discharging system 10, the charging / discharging system 10 generates display data 164l for causing the display device 41 to display a screen indicating that the vehicle power storage device 51 is not connected. This allows the connection status of the vehicle power storage device 51 to the charging / discharging system 10 to be displayed on the screen of the display device 41, making it easy to intuitively understand that even if charging / discharging between the charging / discharging system 10 and the vehicle power storage device 51 has stopped, this does not mean that there is a malfunction in the equipment. This makes it easy to understand the exchange of power in the charging / discharging system 10.

[0112] When the charging / discharging system 10 acquires the vehicle selection information 41a, it generates screen display data 164l including vehicle power storage device information 164g and a vehicle current direction graphic 164j for each of the plurality of vehicle power storage devices 51. As a result, when a plurality of vehicle power storage devices 51 are connected to the charging / discharging system 10, the information and graphic for each of the plurality of vehicle power storage devices 51 can be displayed on the screen of the display device 41, making it easy to intuitively understand the status of the plurality of vehicle power storage devices 51. Therefore, even when a plurality of vehicle power storage devices 51 are connected to the charging / discharging system 10, it is possible to easily understand the exchange of power in the charging / discharging system 10 for each of the plurality of vehicle power storage devices 51.

[0113] The charging / discharging system 10 generates display data 164l for causing the display device 41 to display a screen further including device information 164h and a device current direction graphic 164k. That is, the charging / discharging system 10 generates display data 164l for a screen further including information indicating at least one of the power generation device 70 and the power storage device 80 and a graphic indicating the direction of electric current flowing between the at least one of the power generation device 70 and the power storage device 80 and the charging / discharging system 10. As a result, even when at least one of the power generation device 70 and the power storage device 80 is connected to the charging / discharging system 10, the exchange of electric power between the charging / discharging system 10 and at least one of the power generation device 70 and the power storage device 80 can be displayed graphically on the screen of the display device 41. Therefore, the exchange of electric power between the charging / discharging system 10 and at least one of the power generation device 70 and the power storage device 80 can be intuitively understood, and therefore the exchange of electric power in the charging / discharging system 10 can be easily understood.

[0114] When the charge / discharge system 10 acquires the device selection information 41b, it generates screen display data 164l including device information 164h and a device current direction graphic 164k for each of the multiple power generation devices 70 or the multiple power storage devices 80. As a result, when multiple power generation devices 70 or multiple power storage devices 80 are connected to the charge / discharge system 10, the information and graphic for each of the multiple power generation devices 70 or multiple power storage devices 80 can be displayed on the screen of the display device 41. Therefore, even when multiple power generation devices 70 or multiple power storage devices 80 are connected to the charge / discharge system 10, the status of the multiple power generation devices 70 or multiple power storage devices 80 can be intuitively grasped, and therefore, the exchange of power in the charge / discharge system 10 can be easily grasped.

[0115] As described above, the charge / discharge system 10 can display a screen on the display device 41 that is neither too difficult nor too simple, so that the exchange of power in the charge / discharge system 10 can be easily understood on the display device 41. If the exchange of power in the charge / discharge system 10 can be easily understood, the operation of the vehicle 50 (such as a business vehicle or a commercial vehicle) can be intuitively understood and used for improvements, thereby optimizing energy management.

[0116] For public or private facilities considering introducing the charging / discharging system 10, it is undesirable for the amount of power received from the power grid 60 to increase as the system operates. Understanding the power exchange in the charging / discharging system 10 and efficiently receiving power from the power grid 60 can help curb increases in electricity bills, promoting the introduction of the charging / discharging system 10. This can also contribute to strengthening disaster prevention functions in public facilities and strengthening BCPs (business continuity plans in the event of a power outage) in private facilities.

[0117] By providing a charging and discharging system10 that makes it easy to understand the exchange of electricity, this will contribute to Goal 7 of the United Nations-led Sustainable Development Goals (SDGs), which is to "Ensure access to affordable, reliable, sustainable and modern energy for all."

[0118] [5. Explanation of Variations] Although the charging / discharging system 10 according to the present embodiment has been described above, the present invention is not limited to the above embodiment. The embodiment disclosed herein is illustrative in all respects and is not restrictive, and the scope of the present invention includes all modifications within the meaning and scope of the claims.

[0119] (Variation 1) In the above embodiment, the display data 164l displayed on the display device 41 of the client device 40 may be displayed as an animation. Figures 14A and 14B are diagrams showing an example of the display data 164l displayed on the display device 41 according to the first modification of the embodiment.

[0120] Of the arrow graphics included in display data 164l, downward arrow graphics may be displayed as animation, as shown in (a) to (e) of Fig. 14A. That is, grid current direction graphic 164i, load information 164d2, vehicle current direction graphic 164j (during charging), and device current direction graphic 164k2 (during charging) may be displayed as animation, with the graphics repeatedly changing at predetermined time intervals (such as one second) in the order of (a) to (e) of Fig. 14A.

[0121] Similarly, among the arrow graphics included in the display data 164l, the upward arrow graphics may be displayed as animation as shown in (a) to (e) of Fig. 14B. That is, the vehicle current direction graphic 164j (during discharge), the device current direction graphic 164k1, and the device current direction graphic 164k2 (during discharge) may be displayed as animation so that the graphics repeatedly change at predetermined time intervals (such as one second) in the order of (a) to (e) of Fig. 14B.

[0122] 14A and 14B, the graphic changes repeatedly in five stages, but the graphic may change in any number of stages, may change only for a certain period of time, and the time interval at which the graphic changes is not particularly limited. As described above, the generation unit 162 generates display data 164l including the graphic of the arrow displayed in the animation. The transmission unit 163 transmits the display data 164l generated by the generation unit 162 to the display device 41 of the client device 40.

[0123] (Variation 2) In the above embodiment, items other than those described above may be included in the display data 164l displayed on the display device 41 of the client device 40. Fig. 15 is a diagram showing an example of the display data 164l displayed on the display device 41 according to the second modification of the embodiment.

[0124] In this modification, the grid current direction graphic 164i includes, in addition to a graphic indicating the direction of the current, information indicating the power receiving state of the charging / discharging system 10 (characters such as "power receiving," "power transmitting," or "power outage"). The information indicating the power receiving state is displayed next to the graphic indicating the direction of the current. Specifically, "power receiving," "power transmitting," or "power outage" is displayed in a switched manner depending on the power receiving state of the charging / discharging system 10. In other words, if the arrow of the graphic is pointing downward, the character "power receiving" is displayed next to the graphic (see FIG. 15), if the arrow of the graphic is pointing upward, the character "power transmitting" is displayed next to the graphic, and in the event of a power outage, the character "power outage" is displayed.

[0125] Furthermore, vehicle power information 164b includes information indicating the remaining capacity of vehicle power storage device 51 in addition to information indicating the power charged and discharged between vehicle power storage device 51 and charging / discharging system 10, and the information indicating the remaining capacity is displayed below the information indicating the power. Specifically, the SOC value (%) of vehicle power storage device 51 is displayed below the information indicating the power.

[0126] As described above, display data 164l may include various items. Generation unit 162 generates display data 164l including the various items. Transmission unit 163 transmits display data 164l generated by generation unit 162 to display device 41 of client device 40.

[0127] (Other variations) In the above embodiment, the functions possessed by the first communication unit 160 may be possessed by the second communication unit 230, or may be possessed by other devices within the charging / discharging system 10, or by devices outside the charging / discharging system 10 (such as the server device 30 or the client device 40).

[0128] In the above embodiment, the display data 164l may be displayed on a display device of the server device 30 or a display device possessed by an apparatus within the charging / discharging system 10 (power conditioner 100 or charger / discharger 200) instead of on the display device 41 of the client device 40.

[0129] In the above embodiment, both the power generation device 70 and the power storage device 80 are connected to the charge / discharge system 10, but it is sufficient if at least one of the power generation device 70 and the power storage device 80 is connected. Alternatively, the charge / discharge system 10 does not necessarily have to be connected to both the power generation device 70 and the power storage device 80.

[0130] In the above embodiment, the power conditioner 100 and the charger / discharger 200 of the charge / discharge system 10 may be integrated. The power conditioner 100 may have a built-in function of the charger / discharger 200, or the charger / discharger 200 may have a built-in function of the power conditioner 100.

[0131] In the above embodiment, the first communication unit 160 is assumed to have a memory unit 164, but it may not have a memory unit 164 and may store information in an external recording medium and acquire the information from the recording medium.

[0132] In the above embodiment, the generation unit 162 arranges the grid information 164f, the grid current direction graphic 164i, and the like above the area information 164e, and arranges the other information below the area information 164e, but they may be arranged upside down or separately on the left and right. The generation unit 162 may arrange various pieces of information and graphics in any other way.

[0133] In the above embodiment, the grid current direction graphic 164i is an arrow graphic indicating the direction of current, but the current direction may be indicated by a graphic other than an arrow, such as a triangle, a pentagon, a finger shape, or a convex shape. The grid current direction graphic 164i may indicate the current direction by the color of the graphic or by text within the graphic, rather than by the shape of the graphic. The same applies to other graphics indicating the direction of current.

[0134] In the above embodiment, the order of the various processes performed by the generation unit 162 may be interchanged. In Fig. 7, the process of S202 and the process of S204 may be interchanged, or the process of S206 and the process of S208 may be interchanged. In Fig. 8, the processes of S302 to S304 and the processes of S306 to S308 may be interchanged. In Fig. 12, the processes of S502 to S506 and the processes of S508 to S512 may be interchanged.

[0135] The present invention can be realized not only as the charging / discharging system 10 and a control method for the charging / discharging system 10, but also as a program for causing a computer to execute processes included in the control method for the charging / discharging system 10. That is, each component included in the first communication unit 160 of the charging / discharging system 10 may be realized by a program execution unit such as a CPU or processor reading and executing a software program recorded on a recording medium such as a hard disk or semiconductor memory. The present invention can also be realized as a computer-readable non-transitory recording medium on which the program is recorded, such as a flexible disk, hard disk, CD-ROM, MO, DVD, DVD-ROM, DVD-RAM, BD (Blu-ray (registered trademark) Disc), or semiconductor memory. The program can be distributed via the recording medium or a transmission medium such as the Internet. The present invention can also be realized as an integrated circuit including a processing unit included in the charging / discharging system 10. That is, each functional block of the first communication unit 160 of the charging / discharging system 10 shown in FIG. 4 may be realized as an LSI (Large Scale Integration) integrated circuit. These functional blocks may be individually implemented on a single chip, or some or all of them may be integrated on a single chip. In this way, each component of the first communication unit 160 of the charging / discharging system 10 may be configured with dedicated hardware, or may be realized by executing a software program suitable for each component.

[0136] Any combination of the components in the above-described embodiments and their modifications is also included within the scope of the present invention. [Industrial Applicability]

[0137] The present invention can be applied to a charging / discharging system or the like that charges and discharges between a vehicle and an electricity storage device. [Explanation of symbols]

[0138] 1. Supply area 10 Charging and discharging system 20 Power load 30 Server device 40 Client Device 41 Display device 41a Vehicle selection information 41b Device selection information 50 vehicles 51 Vehicle power storage device 60 Power system 70 Power Generation Equipment 80 Electricity storage device 100 Power Conditioner 160 First Communications Department 161 Acquisition Department 162 Generation part 163 Transmitter 164 Storage section 164a Grid power information 164b, 164b1, 164b2, 164b3 Vehicle power information 164c, 164c1, 164c2 device power information 164d, 164d1, 164d2, 164d3 Load information 164e Area Information 164f Lineage information 164g, 164g1, 164g2, 164g3 Vehicle power storage device information 164h, 164h1, 164h2 device information 164i System current direction diagram 164j, 164j1, 164j2, 164j3 Vehicle current direction diagram 164k, 164k1, 164k2 device current direction diagram 164l display data 200 charger / discharger 230 Second Communications Department

Claims

1. A charging / discharging system that charges / discharges between a vehicle power storage device, which is a power storage device included in a vehicle, in a predetermined supply area to which power is supplied from an electric power grid, and supplies power to an electric load within the supply area, an acquisition unit that acquires system power information indicating power flowing between the power system and the charging / discharging system, and vehicle power information indicating power charged / discharged between the vehicle power storage device and the charging / discharging system; a generation unit that generates display data for displaying on a display device a screen including area information indicating the supply area, system information indicating the power system, vehicle power storage device information indicating the vehicle power storage device, a system current direction graphic that is a graphic indicating a direction of current of power indicated by the system power information, a vehicle current direction graphic that is a graphic indicating a direction of current of power indicated by the vehicle power information, and load information that indicates a power consumption state of the power load; a transmitter that transmits the display data to the display device, a power generation device is connected to the charging / discharging system; the acquisition unit acquires device power information indicating power flowing between the power generation device and the charging / discharging system; the generation unit generates the display data for causing the display device to display a screen further including device information indicating the power generation device and a device current direction graphic that is a graphic indicating a direction of current of power indicated by the device power information, wherein the grid information and the grid current direction graphic are located on one side of the area information, and the vehicle power storage device information, the vehicle current direction graphic, the load information, the device information, and the device current direction graphic are located on the other side of the area information; a plurality of the vehicle power storage devices are connected to the charging / discharging system; the acquisition unit is configured to be able to acquire vehicle selection information indicating that the vehicle power storage device information or the vehicle current direction graphic displayed on the display device has been selected, The generation unit when the acquisition unit has not acquired the vehicle selection information, the plurality of vehicle power storage devices are regarded as one vehicle power storage device, and the display data is generated for displaying, on the display device, a screen including the vehicle power storage device information and the vehicle current direction graphic; When the acquisition unit acquires the vehicle selection information, the acquisition unit generates the display data for displaying, on the display device, a screen including the vehicle power storage device information and the vehicle current direction graphic for each of the plurality of vehicle power storage devices. Charging and discharging system.

2. A charging / discharging system that charges / discharges between a vehicle power storage device, which is a power storage device included in a vehicle, in a predetermined supply area to which power is supplied from an electric power grid, and supplies power to an electric load within the supply area, an acquisition unit that acquires system power information indicating power flowing between the power system and the charging / discharging system, and vehicle power information indicating power charged / discharged between the vehicle power storage device and the charging / discharging system; a generation unit that generates display data for displaying on a display device a screen including area information indicating the supply area, system information indicating the power system, vehicle power storage device information indicating the vehicle power storage device, a system current direction graphic that is a graphic indicating a direction of current of power indicated by the system power information, a vehicle current direction graphic that is a graphic indicating a direction of current of power indicated by the vehicle power information, and load information that indicates a power consumption state of the power load; a transmitter that transmits the display data to the display device, a power generation device is connected to the charging / discharging system; the acquisition unit acquires device power information indicating power flowing between the power generation device and the charging / discharging system; the generation unit generates the display data for causing the display device to display a screen further including device information indicating the power generation device and a device current direction graphic that is a graphic indicating a direction of current of power indicated by the device power information, wherein the grid information and the grid current direction graphic are located on one side of the area information, and the vehicle power storage device information, the vehicle current direction graphic, the load information, the device information, and the device current direction graphic are located on the other side of the area information; a plurality of the power generation devices are connected to the charging / discharging system; the acquisition unit is configured to be able to acquire device selection information indicating that the device information or the device current direction graphic displayed on the display device has been selected, The generation unit If the acquisition unit has not acquired the device selection information, the plurality of power generation devices are regarded as one power generation device, and the display data is generated to display a screen including the device information and the device current direction diagram on the display device; When the acquisition unit acquires the device selection information, the acquisition unit generates the display data for displaying on the display device a screen including the device information and the device current direction graphic for each of the plurality of power generation devices. Charging and discharging system.

3. The generation unit determining at least one of whether the power indicated by the grid power information is 0 and whether the power indicated by the vehicle power information is 0; generating the display data for causing the display device to display, when it is determined that the power indicated by the grid power information is 0, a screen including the grid current direction graphic that is different from a screen when the power is not 0, or a screen not including the grid current direction graphic; When it is determined that the power indicated by the vehicle power information is 0, the display data is generated to cause the display device to display a screen including the vehicle current direction figure, or a screen not including the vehicle current direction figure, which is different from a screen when the power is not 0. The charging / discharging system according to claim 1 or 2.

4. The generation unit generates the display data for causing the display device to display a screen in which the system information and the system current direction graphic are positioned above the area information, and the vehicle power storage device information, the vehicle current direction graphic, the load information, the device information, and the device current direction graphic are positioned below the area information. The charge / discharge system according to any one of claims 1 to 3.

5. The generation unit determines whether the vehicle power storage device is connected to the charging / discharging system, and when it is determined that the vehicle power storage device is not connected to the charging / discharging system, generates the display data for causing the display device to display a screen including information about the vehicle power storage device that is different from a screen displayed when it is determined that the vehicle power storage device is connected to the charging / discharging system, or a screen not including the information about the vehicle power storage device. The charge / discharge system according to any one of claims 1 to 4.

6. A control method for a charge / discharge system that charges / discharges between a vehicle power storage device, which is a power storage device included in a vehicle, in a predetermined supply area to which power is supplied from a power grid, and supplies power to an electric load within the supply area, comprising: a power generation device is connected to the charging / discharging system; acquiring system power information indicating power flowing between the power system and the charging / discharging system, vehicle power information indicating power charged / discharged between the vehicle power storage device and the charging / discharging system, and device power information indicating power flowing between the power generation device and the charging / discharging system; generate display data for displaying on a display device a screen including area information indicating the supply area, system information indicating the power system, vehicle power storage device information indicating the vehicle power storage device, a system current direction graphic that is a graphic indicating a direction of current of power indicated by the system power information, a vehicle current direction graphic that is a graphic indicating the direction of current of power indicated by the vehicle power information, load information indicating a power consumption state of the power load, device information indicating the power generation device, and a device current direction graphic that is a graphic indicating the direction of current of power indicated by the device power information, wherein the system information and the system current direction graphic are located on one side of the area information, and the vehicle power storage device information, the vehicle current direction graphic, the load information, the device information, and the device current direction graphic are located on the other side of the area information; transmitting the display data to the display device; a plurality of the vehicle power storage devices are connected to the charging / discharging system; When generating the display data, when vehicle selection information indicating that the vehicle power storage device information or the vehicle current direction graphic displayed on the display device has been selected has not been acquired, the plurality of vehicle power storage devices are regarded as one vehicle power storage device, and the display data is generated for displaying a screen including the vehicle power storage device information and the vehicle current direction graphic on the display device; When the vehicle selection information is acquired, the display data is generated to cause the display device to display a screen including the vehicle power storage device information and the vehicle current direction graphic for each of the plurality of vehicle power storage devices. A method for controlling a charging and discharging system.

7. A control method for a charge / discharge system that charges / discharges between a vehicle power storage device, which is a power storage device included in a vehicle, in a predetermined supply area to which power is supplied from a power grid, and supplies power to an electric load within the supply area, comprising: a power generation device is connected to the charging / discharging system; acquiring system power information indicating power flowing between the power system and the charging / discharging system, vehicle power information indicating power charged / discharged between the vehicle power storage device and the charging / discharging system, and device power information indicating power flowing between the power generation device and the charging / discharging system; generate display data for displaying on a display device a screen including area information indicating the supply area, system information indicating the power system, vehicle power storage device information indicating the vehicle power storage device, a system current direction graphic that is a graphic indicating a direction of current of power indicated by the system power information, a vehicle current direction graphic that is a graphic indicating the direction of current of power indicated by the vehicle power information, load information indicating a power consumption state of the power load, device information indicating the power generation device, and a device current direction graphic that is a graphic indicating the direction of current of power indicated by the device power information, wherein the system information and the system current direction graphic are located on one side of the area information, and the vehicle power storage device information, the vehicle current direction graphic, the load information, the device information, and the device current direction graphic are located on the other side of the area information; transmitting the display data to the display device; a plurality of the power generation devices are connected to the charging / discharging system; When generating the display data, If device selection information indicating that the device information or the device current direction graphic displayed on the display device has been selected has not been acquired, the plurality of power generation devices are regarded as one power generation device, and the display data for displaying a screen including the device information and the device current direction graphic on the display device is generated; When the device selection information is acquired, the display data is generated to display on the display device a screen including the device information and the device current direction diagram for each of the plurality of power generation devices. A method for controlling a charging and discharging system.

8. A program for causing a computer to execute the processes included in the method for controlling a charge / discharge system according to claim 6 or 7.

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