JPWO2021038683A1 - Charge / discharge control device, charge / discharge system, charge / discharge control method and program - Google Patents

Abstract

The charge / discharge control device (1) has a charging mode for charging the power storage device by supplying at least one of the power generated by the power generation facility and the system power supplied from the system power supply to the power storage device, and the power storage device. It controls a charging / discharging device (7) that operates in any of the discharging modes of discharging and supplying power to the dwelling unit. The charge / discharge control device (1) has a power acquisition unit (111) that acquires power generation information indicating generated power and system power information indicating system power, and a power storage unit (111) that acquires power storage amount information indicating the storage amount of the power storage device. Based on the amount acquisition unit (112) and the generated power information and system power information acquired by the power acquisition unit (111), the ratio of electricity stored by using the generated power in the power generation facility for the power storage device is shown. It includes a storage amount ratio calculation unit (113) for calculating the power storage amount ratio, and a command unit (117) for outputting discharge command information to the charging / discharging device (7) based on the power generation utilization storage amount ratio.

Description

The present invention relates to a charge / discharge control device, a charge / discharge system, a charge / discharge control method and a program.

When there is a margin in the amount of power generated by the solar power generation panel, the power generated by the solar power generation panel is supplied to the battery of the electric vehicle, and when the solar power generation panel is not generating power and the battery of the electric vehicle is used. A power management system has been proposed in which power charged in a battery is supplied to a domestic load when there is surplus power (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2001-8380

However, in the electric power management system described in Patent Document 1, when the electric power charged in the battery of the electric vehicle is supplied to the domestic load by the electric power supplied from the grid power supply, the amount of electricity purchased from the grid power supply is reduced. Cannot be realized.

The present invention has been made in view of the above reasons, and an object of the present invention is to provide a charge / discharge control device, a charge / discharge system, a charge / discharge control method, and a program capable of reducing the power supply from the system power supply to the power consumption area. do.

In order to achieve the above object, the control device according to the present invention is
A charging mode in which at least one of the generated power generated by the power generation facility and the grid power supplied from the grid power source is supplied to at least one power storage device to charge the at least one power storage device, and the at least one power storage device. It is a charge / discharge control device that controls a charge / discharge device that operates in either a discharge mode that discharges the device and supplies power to a power consuming area, or an operation mode.
A power acquisition unit that acquires power generation information indicating the generated power and grid power information indicating the grid power, and a power acquisition unit.
A storage amount acquisition unit that acquires storage amount information indicating the storage amount of each of the at least one power storage device, and a storage amount acquisition unit.
Based on the generated power information acquired by the power acquisition unit and the system power information, the power generation utilization storage amount ratio, which is the ratio of the electricity stored by using the generated power for the at least one power storage device, is calculated. The electricity storage ratio calculation unit and
A command unit for transmitting discharge command information for operating the charge / discharge device in the discharge mode to the charge / discharge device based on the power generation utilization storage amount ratio is provided.

According to the present invention, the power storage amount ratio calculation unit is the ratio of the electricity stored by using the generated power for each of at least one power storage device based on the generated power information and the grid power information. Calculate the ratio. Then, the command unit outputs the discharge command information to the charging / discharging device based on the calculated power generation utilization storage amount ratio. As a result, for example, when the command unit has a power generation utilization storage amount ratio larger than 0 for each of at least one power storage device, the power generation is generated by outputting the discharge command information to the charging / discharging device to discharge the at least one power storage device. The electricity generated by the equipment can be used preferentially. Then, by preferentially utilizing the electricity generated by the power generation facility, the power supplied from the grid power source to the power consumption area can be reduced.

Schematic block diagram of the charge / discharge system according to the first embodiment of the present invention. Configuration diagram of the charging / discharging device according to the first embodiment A block diagram showing a hardware configuration of the charge / discharge control device according to the first embodiment. A block diagram showing a functional configuration of the charge / discharge control device according to the first embodiment. A block diagram showing a hardware configuration of a terminal device according to the first embodiment. A block diagram showing a functional configuration of the terminal device according to the first embodiment. The figure which shows an example of the operation screen image displayed on the terminal apparatus which concerns on Embodiment 1. A flowchart showing an example of the flow of the charge / discharge control process executed by the charge / discharge control device according to the first embodiment. Schematic configuration diagram of the charge / discharge system according to the second embodiment Configuration diagram of the charging / discharging device according to the second embodiment A block diagram showing a functional configuration of the charge / discharge control device according to the second embodiment. A flowchart showing an example of the flow of the charge / discharge control process of the power storage device executed by the charge / discharge control device according to the second embodiment. A flowchart showing an example of the flow of the battery charge / discharge control process executed by the charge / discharge control device according to the second embodiment.

(Embodiment 1)
Hereinafter, the charge / discharge control device according to the embodiment of the present invention will be described with reference to the drawings. The charge / discharge control device according to the present embodiment controls a charge / discharge device that operates in either a charge mode or a discharge mode. Here, the charging mode is an operation mode for charging the power storage device by supplying at least one of the generated power generated by the power generation facility and the system power supplied from the system power source to the power storage device. Further, the discharge mode is an operation mode in which the power storage device is discharged to supply power to the power consuming area. The charge / discharge control device includes a power acquisition unit that acquires power generation information indicating the power generated by the power generation facility and system power information indicating the system power supplied from the system power source, and a storage amount indicating the amount of electricity stored in the power storage device. It is equipped with a storage amount acquisition unit for acquiring information. Further, the charge / discharge control device further generates power, which is the ratio of electricity stored by using the power generated in the power generation facility for the power storage device based on the power generation information acquired by the power acquisition unit and the grid power information. It includes a storage amount ratio calculation unit that calculates the usage storage amount ratio, and a command unit that transmits discharge command information to the charging / discharging device based on the calculated power generation utilization storage amount ratio. Here, the discharge command information is command information for operating the charge / discharge device in the above-mentioned discharge mode.

As shown in FIG. 1, for example, the charge / discharge system according to the present embodiment is installed in the building H1 which is the power consumption area where the power generation facility 4 and the power storage device 8 are installed. Further, in the building H1, the electric power supplied from the power generation facility 4, the grid power source 100, or the power storage device 8 is supplied to a plurality of electric devices 6 (only one is shown in FIG. 1) arranged in the building H1. The distribution board 5 is installed. The grid power supply 100 is provided by an electric power company. The power generation facility 4 includes, for example, a solar cell module that generates power by sunlight, which is natural energy, and a power conversion device. Here, the power conversion device is, for example, a DC-DC converter (not shown) that converts a direct current output from a solar cell module into a voltage, and an AC that converts a direct current output from the DC-DC converter into an alternating current and outputs the AC. It has a −DC converter (not shown).

The distribution board 5 is connected to the system power supply 100 via the power line D1, is connected to the power generation facility 4 via the power line D2, and is connected to each of the plurality of electric devices 6 via the power line D3. Then, power is supplied from the grid power source 100 to the distribution board 5 through the power line D1, and power is supplied from the power generation facility 4 to the distribution board 5 through the power line D2. Further, electric power is supplied from the distribution board 5 to the electric device 6 through the power line D3. The plurality of electric devices 6 are, for example, an air conditioner, a lighting device, a floor heating system, a refrigerator, an IH (Induction Heating) cooker, a television, and the like, and operate by receiving AC power from the distribution board 5. Here, the electric power supplied from the grid power source 100 to the distribution board 5 corresponds to the electric power purchased from the electric power company by the user of the building H1 (hereinafter referred to as “electric power purchased”). On the other hand, the electric power supplied from the power generation facility 4 to the distribution board 5 corresponds to the electric power generated by the power generation facility 4 (hereinafter, referred to as “generated power”).

The charge / discharge system according to the present embodiment includes a charge / discharge device 7 connected to the power storage device 8, a power measurement device 3, a terminal device 2, and a charge / discharge control device 1. The charging / discharging device 7, the power measuring device 3, the terminal device 2, and the charging / discharging control device 1 can communicate with each other via the home network NW1. The home network NW1 conforms to a communication method based on a communication standard such as Wi-Fi (registered trademark), Wi-SUN (registered trademark), and wired LAN (Local Area Network). The charging / discharging device 7 has a charging mode for charging the power storage device 8 by supplying at least one of the power generated by the power generation facility 4 and the system power supplied from the system power source 100 to the power storage device 8, and the power storage device. It operates in one of the discharge modes in which 8 is discharged and power is supplied into the building H1.

As shown in FIG. 2, for example, the charging / discharging device 7 includes a power conditioner 71, a voltage detection unit 72 that detects the output voltage of the power storage device 8, and a power storage device 8 based on the voltage detected by the voltage detection unit 72. It has a storage amount calculation unit 73 for calculating the storage amount of the above. The power conditioner 71 is connected to the distribution board 5 via the power line D4, and is connected to the power storage device 8 via the power line D5. The power conditioner 71 is, for example, a bidirectional DC-DC converter (not shown) connected to the power storage device 8 and a bidirectional AC-between the above-mentioned bidirectional DC-DC converter and the distribution board 5. It has a DC converter (not shown). Further, the power conditioner 71 is a converter control unit (shown) that controls a bidirectional DC-DC converter and a bidirectional AC-DC converter based on the charge command information or the discharge command information input from the charge / discharge control device 1. Do not have). Here, when the charging / discharging device 7 operates in the charging mode, the bidirectional DC-DC converter steps down the DC voltage input from the AC-DC converter and outputs it to the power storage device 8, and the charging / discharging device 7 discharges. When operating in the mode, the DC voltage output from the power storage device 8 is boosted and output to the bidirectional AC-DC converter. Further, the bidirectional AC-DC converter converts the alternating current input from the distribution board 5 into direct current and outputs it to the bidirectional DC-DC converter when the charging / discharging device 7 operates in the charging mode. When 7 operates in the discharge mode, the direct current output from the bidirectional DC-DC converter is converted into alternating current and output to the distribution board 5. The electricity storage amount calculation unit 73 transmits the electricity storage amount information indicating the calculated electricity storage amount of the electricity storage device 8 to the charge / discharge control device 1 via the home network NW1.

Returning to FIG. 1, the power measuring device 3 has current transformers CT1, CT2, and CT4 provided on the power lines D1, D2, and D4, respectively. Then, the power measuring device 3 receives power supplied from the system power source 100 to the distribution board 5, power supplied from the power generation facility 4 to the distribution board 5, and power distribution via the current transformers CT1, CT2, and CT4. The electric power exchanged between the board 5 and the power storage device 8 is measured.

As shown in FIG. 3, the charge / discharge control device 1 includes a CPU (Central Processing Unit) 101, a main storage unit 102 which is a volatile memory used as a work area of the CPU 101, a magnetic disk, a semiconductor flash memory, and the like. It has an auxiliary storage unit 103 that is a non-volatile memory, a communication interface 104 for communicating with the charging / discharging device 7 or the terminal device 2, a timing unit 105, and a bus 109 that connects them to each other. The auxiliary storage unit 103 stores programs for realizing various functions of the charge / discharge control device 1. The communication interface 104 communicates with the charging / discharging device 7 or the terminal device 2 via the above-mentioned home network NW1. The timekeeping unit 105 functions as an RTC (Real Time Clock) for measuring the current date and time. The clock unit 105 includes, for example, a crystal oscillator that generates a clock signal (not shown), a frequency dividing circuit that divides the clock signal (not shown), and a power storage element that supplies power to drive the crystal oscillator. , Have.

By reading the program stored in the auxiliary storage unit 103 into the main storage unit 102 and executing the CPU 101, as shown in FIG. 4, the power acquisition unit 111, the storage amount acquisition unit 112, the storage amount ratio calculation unit 113, and the rest It functions as an amount determination unit 114, a power determination unit 115, a storage amount ratio determination unit 116, a command unit 117, a storage amount ratio information transmission unit 118, and a timing determination unit 119. Further, as shown in FIG. 4, the auxiliary storage unit 103 shown in FIG. 3 includes a power information storage unit 131, a storage amount storage unit 132, a storage amount ratio storage unit 133, and a command storage unit 134. The power information storage unit 131 includes power generation information indicating the power generated by the power generation facility 4 measured by the power measuring device 3, and system power information indicating system power supplied from the system power source 100 into the building H1. , Are stored in association with the date and time information indicating the date and time when they were acquired. Further, the power information storage unit 131 inputs the charging power information indicating the power supplied from the distribution board 5 to the power storage device 8 when the charging / discharging device 7 is operating in the charging mode, and the date and time when the charging power information is acquired. It is stored in association with the indicated date and time information. The electricity storage amount storage unit 132 stores the electricity storage amount information indicating the electricity storage amount of the electricity storage device 8 in association with the date and time information indicating the date and time when it was acquired. The storage amount ratio storage unit 133 includes power generation use storage amount ratio information indicating the power generation use storage amount ratio Rg, which is the ratio of electricity stored by using the power generated by the power generation facility 4, and the system power supply. It stores the grid-used electricity storage ratio information indicating the grid-utilized electricity storage ratio, which is the ratio of the electricity stored by using the grid power supplied from 100. The command storage unit 134 stores the charging command information or the discharging command information transmitted to the charging / discharging device 7 in association with the date / time information indicating the date and time when they are transmitted.

The power acquisition unit 111 acquires power generation information indicating the power generated by the power generation facility 4 and system power information indicating the system power supplied from the system power source 100 at preset acquisition time intervals. Here, the acquisition time can be set to, for example, 1 min. Then, the power acquisition unit 111 associates the acquired power generation power information and the grid power information with the date and time information indicating the date and time when the power generation information and the grid power information timed by the timing unit 105 are acquired, and the power information storage unit 131. To memorize. Further, the power acquisition unit 111 acquires charging power information indicating the power supplied from the distribution board 5 to the power storage device 8 at the above-mentioned acquisition time interval when the charging / discharging device 7 is operating in the charging mode. .. Then, the power acquisition unit 111 stores the acquired charging power information in the power information storage unit 131 in association with the date and time information indicating the date and time when the charging power information measured by the time measuring unit 105 is acquired.

The electricity storage amount acquisition unit 112 acquires the electricity storage amount information indicating the electricity storage amount of the electricity storage device 8 transmitted from the charge / discharge device 7. Then, the electricity storage amount acquisition unit 112 stores the acquired electricity storage amount information in the power information storage unit 131 in association with the date and time information indicating the date and time when the electricity storage amount information measured by the timekeeping unit 105 is acquired.

The storage amount ratio calculation unit 113 is the ratio of electricity stored in the power storage device 8 by using the power generated by the power generation facility 4 based on the power generation information and the grid power information acquired by the power acquisition unit 111. Calculate the power generation storage amount ratio. Further, the electricity storage ratio calculation unit 113 stores electricity using the grid power supplied from the grid power supply 100 for the power storage device 8 based on the generated power information and the grid power information acquired by the power acquisition unit 111. The ratio of electricity stored in the grid, which is the ratio of, is also calculated. Specifically, the storage amount ratio calculation unit 113 provides charging power information indicating the amount of power supplied from the distribution board 5 to the charging / discharging device 7 when the charging / discharging device 7 is operating in the charging mode. Obtained from the power information storage unit 131. Here, the storage amount ratio calculation unit 113 specifies the time when the charging / discharging device 7 is operating in the charging mode based on the date / time information indicating the date and time when the charging command information stored in the command storage unit 134 is transmitted. .. Further, the electricity storage ratio calculation unit 113 stores system power information indicating the amount of power supplied from the system power supply 100 to the distribution board 5 when the charging / discharging device 7 is operating in the charging mode. Obtained from 131.

Next, the electric energy ratio calculation unit 113 supplies the electric energy obtained by subtracting the electric energy indicated by the acquired system electric energy information from the electric energy indicated by the acquired charging electric energy information from the power generation facility 4 to the electric energy storage device 8. Calculated as electric energy. Then, the storage amount ratio calculation unit 113 calculates the ratio of the calculated power amount to the power amount indicated by the charging power information as the power generation utilization storage amount ratio Rg. Further, the electricity storage amount ratio calculation unit 113 calculates the ratio of the electric energy indicated by the grid power information to the electric energy indicated by the charging electric energy information as the system use electric energy storage amount ratio. Then, the storage amount ratio calculation unit 113 stores the power generation use storage amount ratio information indicating the calculated power generation use storage amount ratio Rg and the system use storage amount ratio information indicating the system use storage amount ratio in the storage amount ratio storage unit 133. Let me.

The remaining amount determination unit 114 determines whether or not the amount of electricity stored in the electricity storage device 8 indicated by the electricity storage amount information stored in the electricity storage amount storage unit 132 is equal to or less than a preset lower limit value of the electricity storage amount. Further, the remaining amount determination unit 114 determines whether or not the amount of electricity stored in the electricity storage device 8 is equal to or less than the upper limit value of the amount of electricity stored. Here, the lower limit of the amount of electricity stored is set to, for example, 5% of the maximum amount of electricity stored in the electricity storage device 8, and the upper limit of the amount of electricity stored is, for example, 95% of the maximum amount of electricity stored in the electricity storage device 8. It may be set to a quantity.

The power determination unit 115 determines whether or not the supply of system power to the building H1, that is, so-called power purchase has occurred, with reference to the system power information stored in the power information storage unit 131. Further, the power determination unit 115 determines whether or not the generated power is generated, that is, whether or not the power generation facility 4 is generating power, with reference to the generated power information stored in the power information storage unit 131. ..

The storage amount ratio determination unit 116 refers to the above-mentioned power generation utilization storage amount ratio information stored in the storage amount ratio storage unit 133, and determines whether or not the power generation utilization storage amount ratio Rg is larger than 0.

The command unit 117 charges / discharges the charge / discharge device 7 with the above-mentioned charge command information, discharge command information, or stop command information for instructing the operation to be stopped, based on the power generation utilization storage amount ratio Rg and the system utilization storage amount ratio. Send to 7. Further, the command unit 117 associates the charge command information, the discharge command information, or the stop command information transmitted to the charge / discharge device 7 with the date / time information indicating the date and time when they are timed by the metering unit 105, and is a command storage unit. Store in 134.

The storage amount ratio information transmission unit 118 acquires the power generation utilization storage amount ratio information of the power storage device 8 and the system usage storage amount ratio information from the storage amount ratio storage unit 133. Then, the storage amount ratio information transmission unit 118 transmits the acquired power generation use storage amount ratio information and the system use storage amount ratio information to the terminal device 2 via the home network NW1. The timing determination unit 119 determines whether or not a preset charge / discharge determination time has arrived based on the current time measured by the timing unit 105. The charge / discharge determination time can be set so as to arrive at intervals of, for example, 5 min.

The terminal device 2 is, for example, a smartphone, a tablet terminal, a mobile phone, or the like. As shown in FIG. 5A, the terminal device 2 includes a CPU 201, a main storage unit 202 which is a volatile memory used as a work area of the CPU 201, a magnetic disk, and a semiconductor. An auxiliary storage unit 203, which is a non-volatile memory such as a flash memory, a display unit 204, an input unit 205, a communication interface 206 for communicating with the charge / discharge control device 1, a bus 209 connecting these to each other, and a bus 209. Has. The display unit 204 has a liquid crystal display, an organic EL (Electroluminescence) display, and the like, and displays various information input from the CPU 201. The input unit 205 is, for example, a touch pad arranged so as to be superimposed on the display unit 204. The input unit 205 receives various operation information according to the user's operation and outputs the received operation information to the CPU 201. The auxiliary storage unit 203 stores various programs executed by the CPU 201. The communication interface 206 is connected to the home network NW1.

By executing the program read from the auxiliary storage unit 203 to the main storage unit 202, the CPU 201 functions as a reception unit 211, a display control unit 212, and a storage amount ratio acquisition unit 213, as shown in FIG. 5B. Further, the auxiliary storage unit 203 shown in FIG. 5A has an image storage unit 231 and a storage amount ratio storage unit 232 as shown in FIG. 5B. The image storage unit 231 stores image information indicating a plurality of types of operation screen images displayed on the display unit 204. The storage amount ratio storage unit 232 stores the above-mentioned power generation utilization storage amount ratio information and system utilization storage amount ratio information. The reception unit 211 receives operation information according to the operation performed by the user on the input unit 205. Then, the reception unit 211 outputs the received operation information to the display control unit 212 or the storage amount ratio acquisition unit 213. The display control unit 212 acquires image information from the image storage unit 231 and acquires power generation use storage amount ratio information and system use storage amount ratio information from the storage amount ratio storage unit 232 to obtain the power generation use storage amount ratio Rg. The display unit 204 displays an operation screen image for notifying the user of the ratio of the stored storage amount used in the system. The storage amount ratio acquisition unit 213 acquires the power generation use storage amount ratio information and the grid use storage amount ratio information transmitted from the charge / discharge control device 1, and the acquired power generation use storage amount ratio information and the grid use storage amount ratio information. Is stored in the storage amount ratio storage unit 232.

Here, the display control unit 212 causes the display unit 204 to display the operation screen image GA1 for notifying the user of the power generation utilization storage amount ratio Rg and the system utilization storage amount ratio, as shown in FIG. 6, for example. The operation screen image GA1 includes an object image GAB imitating the power storage device 8, a region A1 showing the power storage amount ratio for system use, and a region A2 showing the power storage amount ratio Rg for power generation. Each of the regions A1 and A2 includes a message M1 indicating the ratio of stored electricity stored in the grid as a numerical value, and a message M2 indicating the ratio of stored electricity stored in power generation Rg as a numerical value.

Next, the charge / discharge control process executed by the charge / discharge control device 1 according to the present embodiment will be described with reference to FIG. 7. The charge / discharge control process is started, for example, when the power is turned on to the charge / discharge control device 1. Further, the power acquisition unit 111 acquires power generation power information and grid power information from the power measurement device 3 at preset acquisition time intervals, and obtains the acquired power generation power information and grid power information, and the date and time information when they are acquired. It is assumed that the power information storage unit 131 is stored in the power information storage unit 131 in parallel with the charge / discharge control process. Further, the electricity storage amount acquisition unit 112 acquires the electricity storage amount information from the charging / discharging device 7 at a preset acquisition time interval, and stores the acquired electricity storage amount information in association with the acquired date and time information. It is assumed that the storage in the unit 132 is executed in parallel with the charge / discharge control process. Further, it is assumed that the storage amount ratio calculation unit 113 executes the process of calculating the power generation utilization storage amount ratio Rg and the grid utilization storage amount ratio in parallel with the charge / discharge control process at the acquisition time interval described above. .. Then, it is assumed that the power generation utilization storage amount ratio information and the grid utilization storage amount ratio information stored in the storage amount ratio storage unit 133 are updated at the above-mentioned acquisition time interval.

First, the timing determination unit 119 determines whether or not the above-mentioned charge / discharge determination time has arrived based on the current time measured by the timing unit 105 (step S101). The timing determination unit 119 repeatedly executes the process of step S101 unless the charge / discharge determination timing arrives (step S101: No). On the other hand, when it is determined by the timing determination unit 119 that the charge / discharge determination time has arrived (step S101: Yes), the remaining amount determination unit 114 is the power storage device 8 indicated by the storage amount information stored in the storage amount storage unit 132. It is determined whether or not the stored amount Qr is equal to or less than the preset lower limit value Qrmin of the stored amount (step S102). Here, when the remaining amount determination unit 114 determines that the stored amount Qr of the power storage device 8 is equal to or less than the lower limit value Qrmin of the stored amount (step S102: Yes), the process of step S107 described later is executed.

On the other hand, when the remaining amount determination unit 114 determines that the electricity storage amount Qr of the electricity storage device 8 is larger than the electricity storage amount lower limit value Qrmin (step S102: No), the power determination unit 115 stores the power information storage unit 131. With reference to the grid power information, it is determined whether or not the grid power supply to the building H1, that is, the so-called power purchase has occurred (step S103). When the power determination unit 115 determines that the so-called power purchase has not occurred (step S103: No), the power generation power generation unit 115 refers to the power generation power information stored in the power information storage unit 131, that is, the power generation power is generated, that is, It is determined whether or not power is being generated in the power generation facility 4 (step S104). Here, it is assumed that the power determination unit 115 determines that the power generation facility 4 is not generating power (step S104: No). In this case, the command unit 117 generates stop command information for stopping the operation of the charge / discharge device 7 and transmits it to the charge / discharge device 7 (step S105). At this time, when the charging / discharging device 7 receives the stop command information, the operation of the power conditioner 71 is stopped. Next, the process of step S101 is executed again.

On the other hand, it is assumed that the power determination unit 115 determines that the power generation facility 4 is generating power (step S104: Yes). In this case, the remaining amount determination unit 114 determines whether or not the stored amount Qr of the power storage device 8 is equal to or less than the stored amount upper limit value Qrmax (step S106). When the remaining amount determination unit 114 determines that the stored amount Qr of the power storage device 8 exceeds the stored amount upper limit value Qrmax (step S106: No), the process of step S105 is executed. On the other hand, when the remaining amount determination unit 114 determines that the electricity storage amount Qr of the electricity storage device 8 is equal to or less than the electricity storage amount upper limit value Qrmax (step S106: Yes), the command unit 117 operates the charge / discharge device 7 in the charge mode. The charging command information for charging is generated and transmitted to the charging / discharging device 7 (step S107). At this time, when the charging / discharging device 7 receives the charging command information, the power conditioner 71 operates the power conditioner 71 in the charging mode. As a result, the charging / discharging device 7 charges the power storage device 8 by using only the electric power generated by the power generation facility 4. Subsequently, the process of step S101 is executed again.

Further, it is assumed that the power determination unit 115 determines in step S103 that so-called power purchase has occurred (step S103: Yes). In this case, the storage amount ratio determination unit 116 refers to the power generation utilization storage amount ratio information stored in the storage amount ratio storage unit 133, and determines whether or not the power generation utilization storage amount ratio Rg is larger than 0 (step). S108). Here, when the storage amount ratio determination unit 116 determines that the power generation utilization storage amount ratio Rg is 0 (step S108: No), the process of step S105 described above is executed. On the other hand, when the storage amount ratio determination unit 116 determines that the power generation utilization storage amount ratio Rg is larger than 0 (step S108: Yes), the command unit 117 issues a discharge command for operating the charge / discharge device 7 in the discharge mode. Information is generated and transmitted to the charging / discharging device 7 (step S109). At this time, when the charging / discharging device 7 receives the discharging command information, the power conditioner 71 operates the power conditioner 71 in the discharging mode. As a result, the charging / discharging device 7 supplies the electricity stored in the power storage device 8 to the distribution board 5. After that, the process of step S101 is executed again.

As described above, according to the charge / discharge control device 1 according to the present embodiment, the power storage amount ratio calculation unit 113 uses the power generation amount ratio for the power storage device 8 based on the power generation power information and the system power information. Calculate Rg and the ratio of electricity stored in the grid. Then, the command unit 117 transmits the discharge command information to the charging / discharging device 7 based on the calculated power generation utilization storage amount ratio Rg and the system utilization storage amount ratio. Further, when the power generation utilization storage amount ratio Rg of the power storage device 8 is 0 or more, the command unit 117 discharges the power storage device 8 by transmitting the discharge command information to the charge / discharge device 7. As a result, the electricity generated by the power generation facility 4 can be preferentially utilized. Then, by preferentially utilizing the electricity generated by the power generation facility 4, the electric power supplied from the grid power source 100 to the building H1 can be reduced.

Further, the command unit 117 according to the present embodiment transmits the charging command information to the charging / discharging device 7 when the generated power is supplied from the power generation facility 4 to the building H1. As a result, the frequency with which the power storage device 8 is charged can be increased by using the power generated by the power generation facility 4, so that the efficiency of using the generated power at the time of discharging the power storage device 8 can be improved.

(Embodiment 2)
The charge / discharge control device according to the present embodiment is in that the first charge / discharge device for charging / discharging the first power storage device and the second charge / discharge device for charging / discharging the second power storage device are separately controlled. It is different from the charge / discharge control device according to the first embodiment. As shown in FIG. 8, for example, the charge / discharge system according to the present embodiment has a first charge / discharge device 2701 that charges / discharges the power storage device 2081, and a second charge / discharge device that charges / discharges the battery 2082 while being connected to the battery 2082. It is equipped with a charging / discharging device 2702. In FIG. 8, the same reference numerals as those in FIG. 1 are attached to the same configurations as those in the first embodiment. The power storage device 2081 is a first power storage device which is a stationary storage battery installed in the building H2. The battery 2082 is a second power storage device mounted on the electric vehicle EV1. The second charging / discharging device 2072 may be electrically connected to the battery 2082 via the power line D52 and the adapter 2083, or may not be connected to the battery 2082. Further, the first charge / discharge device 2701, the second charge / discharge device 2702, and the charge / discharge control device 2001 that controls the first charge / discharge device 2701 and the second charge / discharge device 2702 communicate with each other via the home network NW1. It is possible.

The first charging / discharging device 2701 has a charging mode for charging the power storage device 2081 by supplying at least one of the power generated by the power generation facility 4 and the system power supplied from the system power source 100 to the power storage device 2081. It operates in one of the discharge modes in which the power storage device 2081 is discharged and power is supplied to the building H2. The second charging / discharging device 2702 receives at least one of the generated power generated by the power generation facility 4 and the grid power supplied from the grid power source 100 in a state of being connected to the battery 2082 of the electric vehicle EV via the adapter 2083. It operates in one of an operation mode, a charge mode in which the battery 2082 is charged by supplying the battery 2082, and a discharge mode in which the battery 2082 is discharged to supply power into the building H2.

As shown in FIG. 9, for example, the first charging / discharging device 2701 has a power conditioner 71, a voltage detection unit 72, and a storage amount calculation unit 73. In FIG. 9, the same reference numerals as those in FIG. 2 are attached to the same configurations as those in the first embodiment. The power conditioner 71 of the first charge / discharge device is connected to the distribution board 2005 via the power line D41, and is connected to the power storage device 2081 via the power line D51. The second charging / discharging device 2702 includes a power conditioner 71, a voltage detection unit 72, a storage amount calculation unit 73, and a connection determination unit 2074. The connection determination unit 2074 determines whether or not the adapter 2083 is connected to the battery 2082 based on the voltage detected by the voltage detection unit 72. Then, when the battery 2082 is connected to the adapter 2083, the connection determination unit 2074 transmits the connection detection information to the charge / discharge control device 2001, and when the connection state between the adapter 2083 and the battery 2082 is released, the disconnection detection information Is transmitted to the charge / discharge control device 2001. The power conditioner 71 of the second charging / discharging device 2702 is connected to the distribution board 2005 via the power line D42, and is connected to the adapter 2083 via the power line D52.

Returning to FIG. 8, the power measuring device 2003 has current transformers CT1, CT2, CT41, and CT42 provided on the power lines D1, D2, D41, and D42, respectively. Then, in the power measuring device 2003, the power supplied from the system power supply 100 to the distribution board 2005 and the power supplied from the power generation facility 4 to the distribution board 2005 via the current transformers CT1, CT2, CT41, and CT42. The electric power transferred between the distribution board 2005 and the power storage device 2081 and the electric power exchanged between the distribution board 2005 and the battery 2082 are measured.

The hardware configuration of the charge / discharge control device 2001 is the same as the hardware configuration of the charge / discharge control device 1 described in the first embodiment. Then, the CPU reads the program stored in the auxiliary storage unit into the main storage unit and executes it, so that the power acquisition unit 2111, the storage amount acquisition unit 2112, the storage amount ratio calculation unit 2113, and the balance remain, as shown in FIG. It functions as an amount determination unit 2114, a power determination unit 2115, a storage amount ratio determination unit 2116, a command unit 2117, a storage amount ratio information transmission unit 2118, a timing determination unit 119, and a battery connection determination unit 2119. In FIG. 10, the same reference numerals as those in FIG. 4 are attached to the same configurations as those in the first embodiment. Further, the auxiliary storage unit includes a power information storage unit 2131, a storage amount storage unit 2132, a storage amount ratio storage unit 2133, and a command storage unit 2134. The power information storage unit 2131 includes power generation information indicating the power generated by the power generation facility 4 measured by the power measuring device 3, and system power information indicating the system power supplied from the system power source 100 into the building H2. , Are stored in association with the date and time information indicating the date and time when they were acquired. Further, the power information storage unit 2131 has acquired the charging power information indicating the power supplied from the distribution board 2005 to the power storage device 2081 when the first charging / discharging device 2701 is operating in the charging mode. It is stored in association with the date and time information indicating the date and time. Further, the power information storage unit 2131 indicates the charging power information indicating the power supplied from the distribution board 2005 to the battery 2082 when the charging / discharging device 2702 is operating in the charging mode, and indicates the date and time when the charging power information was acquired. It is stored in association with the date and time information.

The storage amount storage unit 2132 stores the storage amount information indicating the storage amount of the storage device 2081 and the storage amount information indicating the storage amount of the battery 2082 in association with the date and time information indicating the date and time when they were acquired. The storage amount ratio storage unit 2133 is supplied from the system power source 100 and the first power generation use storage amount ratio information indicating the storage amount ratio of the electricity stored by using the power generated by the power generation facility 4 for the power storage device 2081. The first system use electricity storage amount ratio information indicating the electricity storage amount ratio of the electricity stored by using the system power is stored. Further, the storage amount ratio storage unit 2133 supplies the battery 2082 from the second power generation utilization storage amount ratio information indicating the storage amount ratio of the electricity stored by using the power generated by the power generation facility 4 and from the grid power source 100. The second system use storage amount ratio information indicating the storage amount ratio of the electricity stored by using the system power to be stored is stored. The command storage unit 2134 stores the charging command information or the discharging command information transmitted to each of the first charging / discharging device 2701 and the second charging / discharging device 2702 in association with the date / time information indicating the date and time when they are transmitted.

The power acquisition unit 2111 acquires power generation information indicating the power generated by the power generation facility 4 and system power information indicating the system power supplied from the system power source 100 at preset acquisition time intervals. Then, the power acquisition unit 2111 stores the acquired power generation power information and grid power information in the power information storage unit 2131 in association with the date and time information indicating the date and time when the power generation information and the grid power information are acquired. Further, the power acquisition unit 2111 provides charging power information indicating the power supplied from the distribution board 2005 to the power storage device 2081 at the above-mentioned acquisition time interval when the first charging / discharging device 2701 is operating in the charging mode. get. Then, the power acquisition unit 2111 stores the acquired charge power information in the power information storage unit 2131 in association with the date and time information indicating the date and time when the charge power information was acquired.

The electricity storage amount acquisition unit 2112 acquires the electricity storage amount information indicating the electricity storage amount of the electricity storage device 2081 transmitted from the first charge / discharge device 2701. Further, the storage amount acquisition unit 2112 acquires the storage amount information indicating the storage amount of the battery 2082 transmitted from the second charging / discharging device 2702. Then, the electricity storage amount acquisition unit 2112 stores the acquired electricity storage amount information in the electricity storage amount storage unit 2132 in association with the date and time information indicating the date and time when the electricity storage amount information was acquired.

The storage amount ratio calculation unit 2113 uses the power generation power information acquired by the power acquisition unit 2111 and the system power information to store the first power generation utilization storage amount ratio R1g for the power storage device 2081 and the second power generation utilization storage for the battery 2082. The quantity ratio R2g is calculated. Further, the storage amount ratio calculation unit 2113 uses the power generation power information acquired by the power acquisition unit 2111 and the system power information to obtain the first system use storage amount ratio for the power storage device 2081 and the system use storage amount for the battery 2082. Calculate the ratio. Specifically, the storage amount ratio calculation unit 2113 acquires the above-mentioned charging power information corresponding to the power storage device 2081 from the power information storage unit 2131. Here, in the storage amount ratio calculation unit 2113, the first charge / discharge device 2701 is in the charge mode based on the date / time information indicating the date and time when the charge command information stored in the command storage unit 2134 is transmitted to the first charge / discharge device 2701. Identify when it is running on. Further, the storage amount ratio calculation unit 2113 stores the system power information indicating the power supplied from the system power supply 100 to the distribution board 2005 when the first charging / discharging device 2701 is operating in the charging mode. Obtained from unit 2131.

Next, the storage amount ratio calculation unit 2113 uses the power obtained by subtracting the power indicated by the acquired system power information from the power indicated by the acquired charge power information as the power supplied from the power generation facility 4 to the power storage device 2081. calculate. Then, the storage amount ratio calculation unit 2113 calculates the ratio of the calculated power to the power indicated by the charging power information as the first power generation utilization storage amount ratio R1g. Further, the storage amount ratio calculation unit 2113 calculates the ratio of the power indicated by the system power information to the power indicated by the charging power information as the storage amount ratio using the first system. Then, the storage amount ratio calculation unit 2113 stores the first power generation utilization storage amount ratio information indicating the first power generation utilization storage amount ratio R1g and the first system utilization storage amount ratio information indicating the first system utilization storage amount ratio. It is stored in the ratio storage unit 2133.

Further, the storage amount ratio calculation unit 2113 acquires the above-mentioned charging power information corresponding to the battery 2082 from the power information storage unit 2131. Further, the storage amount ratio calculation unit 2113 stores the system power information indicating the power supplied from the system power supply 100 to the distribution board 2005 when the second charging / discharging device 2702 is operating in the charging mode. Obtained from unit 2131. Next, the storage amount ratio calculation unit 2113 calculates the power obtained by subtracting the power indicated by the acquired system power information from the power indicated by the acquired charge power information as the power supplied from the power generation facility 4 to the battery 2082. do. Then, the storage amount ratio calculation unit 2113 calculates the ratio of the calculated power to the power indicated by the charging power information as the second power generation utilization storage amount ratio R2g. Further, the storage amount ratio calculation unit 2113 calculates the ratio of the power indicated by the system power information to the power indicated by the charging power information as the storage amount ratio using the second system. Then, the storage amount ratio calculation unit 2113 stores the second power generation utilization storage amount ratio information indicating the second power generation utilization storage amount ratio R2g and the second system utilization storage amount ratio information indicating the second system utilization storage amount ratio. It is stored in the ratio storage unit 2133.

The remaining amount determination unit 2114 determines whether or not the amount of electricity stored in the electricity storage device 2081 or the battery 2082 indicated by the electricity storage amount information stored in the electricity storage amount storage unit 2132 is equal to or less than a preset lower limit value of the electricity storage amount. Further, the remaining amount determination unit 2114 determines whether or not the amount of electricity stored in the electricity storage device 2081 or the battery 2082 is equal to or less than the upper limit value of the electricity storage amount. Here, the lower limit of the amount of electricity stored in the electricity storage device 2081 is set to, for example, 5% of the maximum amount of electricity stored in the electricity storage device 2081, and the upper limit of the amount of electricity stored in the electricity storage device 2081 is, for example, the electricity storage device 2081. The storage amount may be set to correspond to 95% of the maximum storage amount. Further, the lower limit of the stored amount of the battery 2082 is set to, for example, 5% of the maximum stored amount of the battery 2082, and the upper limit of the stored amount of the battery 2082 is, for example, 95 of the maximum stored amount of the battery 2082. It may be set to the amount of electricity stored corresponding to%. Here, the remaining amount determination unit 2114 refers to the history of the charge command information, the discharge command information, etc. for the first charge / discharge device 2701 stored in the command storage unit 2134, and the first charge / discharge device 2701 operates in the discharge mode. When it is determined that the battery 2082 is inside, it is determined whether or not the stored amount of the battery 2082 is equal to or less than the upper limit of the stored amount.

The power determination unit 2115 refers to the system power information stored in the power information storage unit 2131, and determines whether or not the supply of system power to the building H2, that is, so-called power purchase has occurred. Further, the power determination unit 2115 refers to the power generation information stored in the power information storage unit 2131, and whether the power generated by the power generation facility 4 is equal to or higher than the first charge rated capacity P1r of the power storage device 2081 set in advance. Judge whether or not. Further, the power determination unit 2115 refers to the generated power information stored in the power information storage unit 2131, and the generated power in the power generation facility 4 is a battery preset with the first charge rated capacity P1r of the above-mentioned power storage device 2081. It is determined whether or not the power is equal to or higher than the sum of the second charge rated capacity P2r of 2082. Further, the power determination unit 2115 determines whether or not the generated power Pg in the power generation facility 4 is less than the second charge rated capacity P2r of the battery 2082.

The storage amount ratio determination unit 2116 determines whether or not the first power generation utilization storage amount ratio R1g is larger than 0 by referring to the first power generation utilization storage amount ratio information stored in the storage amount ratio storage unit 2133. Further, the storage amount ratio determination unit 2116 determines whether or not the second power generation utilization storage amount ratio R2g is larger than 0 by referring to the second power generation utilization storage amount ratio information stored in the storage amount ratio storage unit 2133. do. Here, the storage amount ratio determination unit 2116 refers to the history of the charge command information, the discharge command information, etc. for the first charge / discharge device 2701 stored in the command storage unit 2134, and the first charge / discharge device 2701 is in the discharge mode. If it is determined that it is not operating, it is determined whether or not the second power generation utilization storage amount ratio R2g is larger than 0.

The command unit 2117 is stopped to stop the above-mentioned charge command information, discharge command information, or operation of the first charging / discharging device 2701 based on the first power generation utilization storage amount ratio R1g and the first system utilization storage amount ratio. Command information is generated and transmitted to the first charging / discharging device 2701. Further, the command unit 2117 is for stopping the operation of the above-mentioned charge command information, discharge command information or the second charging / discharging device 2702 based on the second power generation utilization storage amount ratio R2g and the second system utilization storage amount ratio. The stop command information of is generated and transmitted to the second charge / discharge device 2702. Further, the command unit 2117 indicates the date and time when the charging command information, the discharging command information, or the stop command information transmitted to the first charging / discharging device 2701 and the second charging / discharging device 2702 is transmitted, which is timed by the measuring unit 105. It is stored in the command storage unit 2134 in association with the date and time information.

The storage amount ratio information transmission unit 2118 is charged from the storage amount ratio storage unit 2133 to the first power generation utilization storage amount ratio information, the first system utilization storage amount ratio information, the second power generation utilization storage amount ratio information, and the second system utilization storage amount. Get percentage information. Then, the storage amount ratio information transmission unit 2118 obtains the acquired first power generation utilization storage amount ratio information, the first system utilization storage amount ratio information, the second power generation utilization storage amount ratio information, and the second system utilization storage amount ratio information. It is transmitted to the terminal device 2 via the home network NW1. The battery connection determination unit 2119 determines the connection state between the second charge / discharge device 2702 and the battery 2082 based on the connection detection information or the release detection information transmitted from the second charge / discharge device 2702. Specifically, if the battery connection determination unit 2119 has acquired the connection detection information from the second charge / discharge device 2702 and has not acquired the release detection information, the battery 2082 is electrically connected to the second charge / discharge device 2702. It is determined that it has been done.

Next, the charge / discharge control process of the power storage device executed by the charge / discharge control device 2001 according to the present embodiment will be described with reference to FIG. 11. The charge / discharge control process of the power storage device is started, for example, when the power is turned on to the charge / discharge control device 2001. Further, the power acquisition unit 2111 acquires power generation information, grid power information, and charging power information from the power measuring device 3 at preset acquisition time intervals, and the acquired power generation information, grid power information, and charging power information. It is assumed that the process of associating them with the acquired date and time information and storing them in the power information storage unit 2131 is executed in parallel with the charge / discharge control process. Further, the storage amount acquisition unit 2112 acquires the storage amount information from the first charging / discharging device 2701 at a preset acquisition time interval, and stores the acquired storage amount information in association with the acquired date and time information. It is assumed that the process of storing in the quantity storage unit 2132 is executed in parallel with the charge / discharge control process. Further, when the second charge / discharge device 2702 and the battery 2082 are electrically connected, the storage amount acquisition unit 2112 acquires the storage amount information from the second charge / discharge device 2702 at a preset acquisition time interval. It is assumed that the process of storing the acquired electricity storage amount information in the electricity storage amount storage unit 2132 in association with the acquired date and time information is executed in parallel with the charge / discharge control process.

Further, the storage amount ratio calculation unit 2113 executes a process of calculating the first power generation utilization storage amount ratio R1g and the first system utilization storage amount ratio in parallel with the charge / discharge control process at the acquisition time interval described above. It is assumed that there is. Further, when the second charging / discharging device 2702 and the battery 2082 are electrically connected, the storage amount ratio calculation unit 2113 uses the second power generation utilization storage amount ratio R2g and the second system at the above-mentioned acquisition time interval. It is assumed that the process of calculating the charge / discharge amount ratio is executed in parallel with the charge / discharge control process.

First, the timing determination unit 119 determines whether or not the above-mentioned charge / discharge determination time has arrived based on the current time measured by the timing unit 105 (step S2101). The timing determination unit 119 repeatedly executes the process of step S2101 unless the charge / discharge determination timing arrives (step S2101: No). On the other hand, when it is determined by the timing determination unit 119 that the charge / discharge determination time has arrived (step S2101: Yes), the remaining amount determination unit 2114 is a power storage device 2081 indicated by the storage amount information stored in the storage amount storage unit 2132. It is determined whether or not the stored amount Q1r is equal to or less than the preset lower limit value Q1rmin (step S2102). Here, when the remaining amount determination unit 2114 determines that the stored amount Q1r of the power storage device 2081 is equal to or less than the lower limit value Q1rmin of the stored amount (step S2102: Yes), the process of step S2110 described later is executed.

On the other hand, when the remaining amount determination unit 2114 determines that the electricity storage amount Q1r of the electricity storage device 2081 is larger than the electricity storage amount lower limit value Q1rmin (step S2102: No), the power determination unit 2115 stores the power information storage unit 2131. With reference to the grid power information, it is determined whether or not so-called power purchase has occurred (step S2103). It is assumed that the power determination unit 2115 determines that so-called power purchase has not occurred (step S2103: No). In this case, the battery connection determination unit 2119 has not acquired the release detection information after acquiring the connection detection information from the second charge / discharge device 2702, that is, the battery 2082 is electrically connected to the second charge / discharge device 2702. (Step S2104). Here, it is assumed that the battery connection determination unit 2119 determines that the battery 2082 and the second charging / discharging device 2702 are not connected (step S2104: No). In this case, the power determination unit 2115 refers to the power generation information stored in the power information storage unit 2131, and the power generation power Pg in the power generation facility 4 is equal to or higher than the first charge rated capacity P1r of the power storage device 2081 set in advance. It is determined whether or not there is (step S2105). Here, when the power determination unit 2115 determines that the generated power Pg in the power generation facility 4 is less than the first charge rated capacity P1r of the power storage device 2081 (step S2105: No), the process of step S2111 described later is executed. Will be done. On the other hand, when the power determination unit 2115 determines that the generated power Pg in the power generation facility 4 is equal to or greater than the first charge rated capacity P1r of the power storage device 2081 (step S2105: Yes), the process of step S2109 described later is executed. To.

Further, it is assumed that the battery connection determination unit 2119 determines in step S2104 that the battery 2082 and the second charge / discharge device 2702 are electrically connected (step S2104: Yes). In this case, the power determination unit 2115 refers to the power generation information stored in the power information storage unit 2131, and the power generation Pg in the power generation facility 4 is a battery preset to the first charge rated capacity P1r of the power storage device 2081. It is determined whether or not the electric power is equal to or more than the sum of the second charge rated capacity P2r of 2082 (step S2106). Here, the power determination unit 2115 determines that the generated power Pg in the power generation facility 4 is less than the power corresponding to the sum of the first charge rated capacity P1r of the power storage device 2081 and the second charge rated capacity P2r of the battery 2082. (Step S2106: No). In this case, the power determination unit 2115 determines whether or not the generated power Pg in the power generation facility 4 is less than the second charge rated capacity P2r of the battery 2082 (step S2107). Here, when the power determination unit 2115 determines that the power generation power Pg in the power generation facility 4 is equal to or greater than the second charge rated capacity P2r of the battery 2082 (step S2107: No), the command unit 2117 determines the above-mentioned stop command information. Is transmitted to the first charging / discharging device 2701 (step S2108). At this time, when the first charging / discharging device 2701 receives the stop command information, the operation of the power conditioner 71 is stopped. Next, the process of step S2101 is executed again. On the other hand, when the power determination unit 2115 determines that the generated power Pg in the power generation facility 4 is less than the second charge rated capacity P2r of the battery 2082 (step S2107: Yes), the process of step S2111 described later is executed.

Further, in step S2106, the power determination unit 2115 determines that the power generated by the power generation facility 4 Pg is equal to or greater than the sum of the first charge rated capacity P1r of the power storage device 2081 and the second charge rated capacity P2r of the battery 2082. It is assumed that there is (step S2106: Yes). In this case, the remaining amount determination unit 2114 determines whether or not the electricity storage amount Q1r of the electricity storage device 2081 is equal to or less than the electricity storage amount upper limit value Q1rmax (step S2109). Here, when the remaining amount determination unit 2114 determines that the stored amount Q1r of the power storage device 2081 exceeds the stored amount upper limit value Q1rmax (step S2109: No), the process of step S2108 is executed. On the other hand, when the remaining amount determination unit 2114 determines that the electricity storage amount Q1r of the electricity storage device 2081 is equal to or less than the electricity storage amount upper limit value Q1rmax (step S2109: Yes), the command unit 2117 charges the first charge / discharge device 2701. The charging command information for operating in the first charging / discharging device 2701 is generated and transmitted to the first charging / discharging device 2701 (step S2110). At this time, when the first charging / discharging device 2701 receives the charging command information, the power conditioner 71 operates in the charging mode. As a result, the first charging / discharging device 2701 charges the power storage device 2081 using only the power generated by the power generation facility 4. Subsequently, the process of step S2101 is executed again.

Further, it is assumed that the power determination unit 2115 determines in step S2103 that so-called power purchase has occurred (step S2103: Yes). In this case, the storage amount ratio determination unit 2116 refers to the first power generation utilization storage amount ratio information stored in the storage amount ratio storage unit 2133, and determines whether or not the first power generation utilization storage amount ratio R1g is larger than 0. Determination (step S2111). Here, when the storage amount ratio determination unit 2116 determines that the first power generation utilization storage amount ratio R1g is 0 (step S211: No), the process of the above-mentioned step S2108 is executed. On the other hand, when the storage amount ratio determination unit 2116 determines that the first power generation utilization storage amount ratio R1g is larger than 0 (step S211: Yes), the command unit 2117 operates the first charge / discharge device 2701 in the discharge mode. The discharge command information for this is generated and transmitted to the first charging / discharging device 2701 (step S2112). At this time, when the first charge / discharge device 2701 receives the discharge command information, the power conditioner 71 operates in the discharge mode. As a result, the first charge / discharge device 2701 supplies the electricity stored in the power storage device 2081 to the distribution board 2005. After that, the process of step S2101 is executed again.

Next, the battery charge / discharge control process executed by the charge / discharge control device 2001 according to the present embodiment will be described with reference to FIG. The battery charge / discharge control process is started when the battery connection determination unit 2119 determines that the battery 2082 and the second charge / discharge device 2702 are electrically connected. Further, this battery charge / discharge control process is executed in parallel with the above-mentioned power storage device charge / discharge control process.

First, the timing determination unit 119 determines whether or not the above-mentioned charge / discharge determination time has arrived based on the current time measured by the timing unit 105 (step S2201). The timing determination unit 119 repeatedly executes the process of step S2201 unless the charge / discharge determination timing arrives (step S2201: No). On the other hand, when it is determined by the time determination unit 119 that the charge / discharge determination time has arrived (step S2201: Yes), the remaining amount determination unit 2114 stores the battery 2082 indicated by the charge amount information stored in the charge amount storage unit 2132. It is determined whether or not the amount Q2r is equal to or less than the preset lower limit value Q2rmin (step S2202). Here, when the remaining amount determination unit 2114 determines that the stored amount Q2r of the battery 2082 is equal to or less than the lower limit value Q2rmin of the stored amount (step S2202: Yes), the process of step S2206 described later is executed.

On the other hand, when the remaining amount determination unit 2114 determines that the stored amount Q2r of the battery 2082 is larger than the lower limit value Q2rmin of the stored amount (step S2202: No), the power determination unit 2115 stores the system stored in the power information storage unit 2131. With reference to the electric power information, it is determined whether or not so-called power purchase has occurred (step S2203). When the power determination unit 2115 determines that so-called power purchase has not occurred (step S2203: No), the power generation power Pg in the power generation facility 4 is described above with reference to the power generation power information stored in the power information storage unit 2131. It is determined whether or not the battery 2082 has a second charge rated capacity P2r or more (step S2204). Here, when the power determination unit 2115 determines that the generated power Pg in the power generation facility 4 is less than the second charge rated capacity P2r of the battery 2082 described above (step S2204: No), the process of step S2207 described later is executed. Will be done. On the other hand, it is assumed that the power determination unit 2115 determines that the generated power Pg in the power generation facility 4 is equal to or larger than the second charge rated capacity P2r of the battery 2082 (step S2204: Yes). In this case, the remaining amount determination unit 2114 determines whether or not the stored amount Q2r of the battery 2082 is equal to or less than the stored amount upper limit value Q2rmax (step S2205). When the remaining amount determination unit 2114 determines that the stored amount Q2r of the battery 2082 exceeds the stored amount upper limit value Q2rmax (step S2205: No), the process of step S2209 described later is executed. On the other hand, when the remaining amount determination unit 2114 determines that the stored amount Q2r of the battery 2082 is equal to or less than the stored amount upper limit value Q2rmax (step S2205: Yes), the command unit 2117 sets the second charging / discharging device 2702 in the charging mode. The charging command information for operation is generated and transmitted to the second charging / discharging device 2702 (step S2206). At this time, when the second charging / discharging device 2702 receives the charging command information, the power conditioner 71 operates in the charging mode. As a result, the second charging / discharging device 2702 charges the battery 2082 using only the power generated by the power generation facility 4. Subsequently, the process of step S2201 is executed again.

Further, it is assumed that the power determination unit 2115 determines in step S2203 that so-called power purchase has occurred (step S2203: Yes). In this case, the remaining amount determination unit 2114 and the storage amount ratio determination unit 2116 refer to the history of the charge command information, the discharge command information, etc. for the second charge / discharge device 2702 stored in the command storage unit 2134, and refer to the history of the first charge / discharge. It is determined whether or not the device 2701 operates in the discharge mode, that is, whether or not the power storage device 2081 is being discharged (step S2207). When the remaining amount determination unit 2114 determines that the power storage device 2081 is discharging (step S2207: Yes), the remaining amount determination unit 2114 executes the process of step S2205 described above. On the other hand, it is assumed that the storage amount ratio determination unit 2116 determines that the storage device 2081 is not discharged (step S2207: No). In this case, the storage amount ratio determination unit 2116 refers to the second power generation utilization storage amount ratio information stored in the storage amount ratio storage unit 2133, and determines whether or not the second power generation utilization storage amount ratio R2g is larger than 0. Determination (step S2208). Here, it is assumed that the storage amount ratio determination unit 2116 determines that the second power generation utilization storage amount ratio R2g is 0 (step S2208: No). In this case, the command unit 2117 generates stop command information for stopping the operation of the second charge / discharge device 2702 and transmits it to the second charge / discharge device 2702 (step S2209). At this time, when the second charging / discharging device 2702 receives the stop command information, the operation of the power conditioner 71 is stopped. Next, the process of step S2201 is executed again.

On the other hand, when the storage amount ratio determination unit 2116 determines that the second power generation utilization storage amount ratio R2g is larger than 0 (step S2208: Yes), the command unit 2117 operates the second charge / discharge device 2702 in the discharge mode. The discharge command information for this is generated and transmitted to the second charging / discharging device 2702 (step S2210). At this time, when the second charge / discharge device 2702 receives the discharge command information, the power conditioner 71 operates in the discharge mode. As a result, the second charging / discharging device 2702 supplies the electricity stored in the battery 2082 to the distribution board 2005. After that, the process of step S2201 is executed again.

As described above, according to the charge / discharge control device 2001 according to the present embodiment, when the power storage device 2081 and the battery 2082 are charged by the power generated by the power generation facility 4, the battery 2082 is preferentially charged. , It becomes easy to make the battery 2082 fully charged. Therefore, when the user starts using the electric vehicle EV1, the probability that the battery 2082 mounted on the electric vehicle EV1 is fully charged can be increased, so that the convenience of the electric vehicle EV1 can be enhanced. .. Further, in the charge / discharge control device 2001 according to the present embodiment, when the battery 2082 is charged, when the first power generation utilization storage amount ratio R1g is 0 or more, the electricity stored in the power storage device 2081 is used to charge the battery 2082. Generates and sends command information for use. As a result, the electricity generated by the power generation facility 4 can be effectively used for charging the battery 2082.

Further, the command unit 2117 according to the present embodiment is in a discharge mode in which the power storage device 2081 is discharged when the power generation is less than the second charge rated capacity when the power is supplied from the power generation facility 4 to the building H2. The first discharge command information for operating the first charge / discharge device 2701 is output to the first charge / discharge device 2701. As a result, even when the amount of power generated by the power generation facility 4 is small, the battery 2082 can be charged with the electricity stored in the power storage device 2081, so that the battery 2082 can be efficiently charged.

Further, in the command unit 2117 according to the present embodiment, when the power is supplied from the power generation facility 4 to the building H2, the generated power is less than the second charge rated capacity and the first charge / discharge device 2701 is the power storage device 2081. When the second power generation utilization storage amount ratio R2g of the battery 2082 is larger than 0, the second discharge command information for operating the second charge / discharge device 2702 in the discharge mode for discharging the battery 2082 is transmitted. It transmits to the second charge / discharge device 2702. As a result, the electricity stored in the battery 2082 can be effectively utilized by utilizing the electric power generated by the power generation facility 4.

Although each embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiments. For example, the storage amount ratio calculation unit 113 may calculate the above-mentioned power generation utilization storage amount ratio and the grid utilization storage amount ratio of the power storage device 8 only from the power generation power information and the grid power information. Specifically, the electricity storage ratio calculation unit 113 acquires the generated power information and the grid power information from the power information storage unit 131, and calculates the sum of the generated power indicated by the generated power information and the grid power indicated by the grid power information. Calculate the corresponding total power. Then, the storage amount ratio calculation unit 113 may calculate the ratio of the generated power indicated by the generated power information to the total power as the power generation utilization storage amount ratio. Further, the storage amount ratio calculation unit 113 may calculate the ratio of the system power indicated by the system power information to the total power as the system utilization storage amount ratio.

According to this configuration, it is not necessary to measure the electric power supplied from the distribution board 5 to the charging / discharging device 7 when the charging / discharging device 7 is operating in the charging mode, so that the configuration of the power measuring device 3 is simplified. Can be achieved.

In the first embodiment, the power storage device 8 has been described as a so-called stationary storage battery, but the present invention is not limited to this, and for example, a battery mounted on an electric vehicle may be used. Further, in the second embodiment, an example in which the charge / discharge control device 2001 controls the charge / discharge of the power storage device 2081 which is a stationary storage battery and the battery 2082 mounted on the electric vehicle EV1 has been described. However, the present invention is not limited to this, and for example, a stationary storage battery may be adopted instead of the battery 2082, or a portable battery may be adopted instead of the power storage device 2081.

Further, various functions of the charge / discharge control device 1 and the terminal device 2 according to the present invention may be realized by software, firmware, or a combination of software and firmware. In this case, the software or firmware is written as a program, and the program can be read by a computer such as a flexible disc, a CD-ROM (Compact Disc Read Only Memory), a DVD (Digital Versatile Disc) and an MO (Magneto-Optical Disc). A computer capable of realizing each of the above-mentioned functions may be configured by storing and distributing the program in a recording medium, reading the program into a computer, and installing the program. When each function is realized by sharing the OS (Operating System) with the application or by collaborating with the OS and the application, only the part other than the OS may be stored in the recording medium.

Further, it is also possible to superimpose each program on the carrier wave and distribute it via the communication network. For example, the program may be posted on a bulletin board system (BBS, Bulletin Board System) on a communication network, and the program may be distributed via the network. Then, by starting these programs and executing them in the same manner as other application programs under the control of the OS, the above-mentioned processing may be executed.

The present invention allows for various embodiments and modifications without departing from the broad spirit and scope of the invention. Further, the above-described embodiment is for explaining the present invention, and does not limit the scope of the present invention. That is, the scope of the present invention is shown not by the embodiment but by the claims. And, various modifications made within the scope of the claims and the equivalent meaning of the invention are considered to be within the scope of the present invention.

INDUSTRIAL APPLICABILITY The present invention is suitable as a charge / discharge system for charging / discharging a stationary storage battery or a battery mounted on an electric vehicle by the electric power generated by a power generation facility.

1,2001 Charging / discharging control device, 2 Terminal device, 3 Power measuring device, 4 Power generation equipment, 5,2005 Distribution board, 6 Electrical equipment, 7 Charging / discharging device, 8,2081 Power storage device, 71 Power conditioner, 72 Voltage detection unit, 73 storage amount calculation unit, 100 system power supply, 101,201 CPU, 102,202 main storage unit, 103,203 auxiliary storage unit, 104,206 communication interface, 105 timing unit, 109,209 bus, 111 power supply Acquisition unit, 112, 2112 Storage amount acquisition unit, 113 Storage amount ratio calculation unit, 114 Remaining amount determination unit, 115 Power determination unit, 116 Storage amount ratio determination unit, 117 Command unit, 118 Storage amount ratio information transmission unit 119 Timing Judgment unit, 131 power information storage unit, 132 storage capacity storage unit, 133,232 storage capacity ratio storage unit, 134,2134 command storage unit, 204 display unit, 205 input unit, 211 reception unit, 212 display control unit, 213 storage capacity Quantity ratio acquisition unit, 231 image storage unit, 2074 connection determination unit, 2082 battery, 2083 adapter, 2701 first charge / discharge device, 2702 second charge / discharge device, A1, A2 area, CT1, CT2, CT4, CT41, CT42 change Discharger, D1, D2, D3, D4, D5, D41, D42, D51, D52 Power line, EV1 electric vehicle, GA1 operation screen image, GAB object image, H1, H2 building, NW1 home network, M1, M2 message,

In order to achieve the above object, the control device according to the present invention is
A charging mode in which at least one of the generated power generated by the power generation facility and the grid power supplied from the grid power source is supplied to at least one power storage device to charge the at least one power storage device, and the at least one power storage device. It is a charge / discharge control device that controls a charge / discharge device that operates in either a discharge mode that discharges the device and supplies power to a power consuming area, or an operation mode.
A power acquisition unit that acquires power generation information indicating the generated power and grid power information indicating the grid power, and a power acquisition unit.
A storage amount acquisition unit that acquires storage amount information indicating the storage amount of each of the at least one power storage device, and a storage amount acquisition unit.
Wherein based on the system power information and the generated power information the power acquisition unit has acquired, at least one power storage device for the power storage which calculates the power generation utilizing the charged amount ratio of electricity stored by using the generated power Amount ratio calculation unit and
A command unit that outputs discharge command information for operating the charge / discharge device in the discharge mode to the charge / discharge device based on the power generation utilization ratio and the power supplied from the system power supply to the power consumption area. And.

According to the present invention, the power storage amount ratio calculation unit is the ratio of the electricity stored by using the generated power for each of at least one power storage device based on the generated power information and the grid power information. Calculate the ratio. Then, the command unit outputs the discharge command information to the charging / discharging device based on the calculated power generation utilization storage amount ratio and the power supplied from the grid power source to the power consumption area. As a result, for example, when the command unit has a power generation utilization storage amount ratio larger than 0 for each of at least one power storage device, the power generation is generated by outputting the discharge command information to the charging / discharging device to discharge the at least one power storage device. The electricity generated by the equipment can be used preferentially. Then, by preferentially utilizing the electricity generated by the power generation facility, the power supplied from the grid power source to the power consumption area can be reduced.

Claims (16)

A charging mode in which at least one of the generated power generated by the power generation facility and the grid power supplied from the grid power source is supplied to at least one power storage device to charge the at least one power storage device, and the at least one power storage device. It is a charge / discharge control device that controls a charge / discharge device that operates in either a discharge mode that discharges the device and supplies power to a power consuming area, or an operation mode.
A power acquisition unit that acquires power generation information indicating the generated power and grid power information indicating the grid power, and a power acquisition unit.
A storage amount acquisition unit that acquires storage amount information indicating the storage amount of each of the at least one power storage device, and a storage amount acquisition unit.
Based on the generated power information acquired by the power acquisition unit and the system power information, the storage amount for calculating the power generation utilization storage amount ratio of the electricity stored by using the generated power for the at least one power storage device. Ratio calculation unit and
A command unit for outputting discharge command information for operating the charge / discharge device in the discharge mode to the charge / discharge device based on the power generation utilization storage amount ratio is provided.
Charge / discharge control device. When power is supplied from the system power source to the power consumption area and the power generation utilization storage amount ratio of the at least one power storage device is larger than 0, the command unit outputs the discharge command information to the charge / discharge device. do,
The charge / discharge control device according to claim 1. The command unit outputs charging command information for operating the charging / discharging device in the charging mode to the charging / discharging device based on the power generation utilization storage amount ratio.
The charge / discharge control device according to claim 1 or 2. The command unit outputs the charging command information to the charging / discharging device when power is supplied from the power generation facility to the power consuming area.
The charge / discharge control device according to any one of claims 1 to 3. The command unit outputs stop command information for stopping the charge / discharge device to the charge / discharge device based on the power generation utilization storage amount ratio.
The charge / discharge control device according to any one of claims 1 to 4. The at least one power storage device includes a first power storage device and a second power storage device.
The command unit is in a discharge mode for discharging the first power storage device when power is supplied from the system power supply to the power consumption area and the power storage capacity ratio of the first power storage device is larger than 0. Discharge command information for operating the charge / discharge device is transmitted to the charge / discharge device, power is supplied from the system power supply to the power consumption area, and the power storage capacity ratio of the first power storage device is 0. When the power generation utilization storage amount ratio of the second power storage device is larger than 0, the discharge command information for operating the charge / discharge device in the discharge mode for discharging the second power storage device is output to the charge / discharge device.
The charge / discharge control device according to claim 1. When power is supplied from the power generation facility to the power consuming area, the command unit has the generated power as the first charge rated capacity of the first power storage device and the second charge rated capacity of the second power storage device. When it is equal to or greater than the sum of, the charging command information for operating the charging / discharging device in the charging mode for charging the first power storage device is output to the charging / discharging device.
The charge / discharge control device according to claim 6. The command unit is charged in a discharge mode in which when power is supplied from the power generation facility to the power consumption area and the generated power is less than the second charge rated capacity, the first power storage device is discharged. Outputs the discharge command information for operating the discharge device to the charge / discharge device.
The charge / discharge control device according to claim 7. The command unit is charged in a charging mode for charging the second power storage device when power is supplied from the power generation facility to the power consumption area and the generated power is equal to or higher than the second charge rated capacity. Outputs charging command information for operating the discharging device to the charging / discharging device.
The charge / discharge control device according to claim 7. When power is supplied from the power generation facility to the power consumption area, the command unit has such that the generated power is less than the second charge rated capacity and the charge / discharge device avoids the discharge of the first power storage device. At the same time, when the power generation utilization storage amount ratio of the second power storage device is larger than 0, the charge / discharge device receives the discharge command information for operating the charge / discharge device in the discharge mode for discharging the second power storage device. Output to
The charge / discharge control device according to any one of claims 7 to 9. The at least one power storage device includes a battery mounted on an electric vehicle.
The charge / discharge control device according to any one of claims 1 to 10. The at least one power storage device includes a stationary storage battery installed in the power consumption area.
The charge / discharge control device according to any one of claims 1 to 11. A charging mode in which at least one of the generated power generated by the power generation facility and the grid power supplied from the grid power source is supplied to at least one power storage device to charge the at least one power storage device, and the at least one power storage device. A discharge mode that discharges the device and supplies power to the power consuming area, a charge / discharge device that operates in one of the operation modes, and a charge / discharge device.
A power acquisition unit that acquires power generation information indicating the generated power and grid power information indicating the grid power, and a power acquisition unit.
A storage amount acquisition unit that acquires storage amount information indicating the storage amount of each of the at least one power storage device, and a storage amount acquisition unit.
Based on the generated power information acquired by the power acquisition unit and the system power information, the storage amount for calculating the power generation utilization storage amount ratio of the electricity stored by using the generated power for the at least one power storage device. Ratio calculation unit and
A command unit for outputting discharge command information for operating the charge / discharge device in the discharge mode to the charge / discharge device based on the power generation utilization storage amount ratio is provided.
Charge / discharge system. Further equipped with a terminal device having a display unit,
The terminal device is
A storage amount ratio acquisition unit that acquires power generation utilization storage amount ratio information indicating the power generation utilization storage amount ratio calculated by the storage amount ratio calculation unit, and a storage amount ratio acquisition unit.
It has a display control unit that displays the power generation utilization storage amount ratio information on the display unit.
The charging / discharging system according to claim 13. A charging mode in which at least one of the generated power generated by the power generation facility and the grid power supplied from the grid power source is supplied to at least one power storage device to charge the at least one power storage device, and the at least one power storage device. It is a charge / discharge control method that controls a charge / discharge device that operates in either a discharge mode that discharges the device and supplies power to a power consuming area, or an operation mode.
The step of acquiring the generated power information indicating the generated power and the grid power information indicating the grid power, and
A step of acquiring storage amount information indicating the storage amount of each of the at least one power storage device, and
Based on the acquired power generation information and the system power information, a step of calculating the power generation usage storage amount ratio of the electricity stored by using the power generation for the at least one power storage device, and
A step of outputting discharge command information for operating the charge / discharge device in the discharge mode to the charge / discharge device based on the power generation utilization storage amount ratio is included.
Charge / discharge control method. Computer,
Power acquisition unit that acquires power generation information indicating the generated power generated by the power generation facility and grid power information indicating the grid power supplied from the grid power supply.
A storage amount acquisition unit that acquires storage amount information indicating the storage amount of each of at least one power storage device.
Based on the generated power information acquired by the power acquisition unit and the system power information, the storage amount for calculating the power generation utilization storage amount ratio of the electricity stored by using the generated power for the at least one power storage device. Ratio calculation unit,
A charging mode for charging the at least one power storage device by supplying at least one of the generated power and the system power to the at least one power storage device based on the power generation utilization storage amount ratio, and the at least one. The discharge command information for operating the charge / discharge device operating in either the discharge mode of discharging the power storage device and supplying power to the power consuming area in the discharge mode is output to the charge / discharge device. Command unit,
A program to function as.

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