Power management system and power supply system

Abstract

To determine proper allocation of a grid, a charger / discharger, and a battery to a required charging amount of the battery.SOLUTION: A power management system 7 for determining arrangement of a charger / discharger and a battery for a plurality of grids having a fixed power supply includes: an input unit 71 that receives an input of a requested charge amount and remaining time of the battery; an acquisition unit 72 that acquires a current charge amount of the battery; a requested output calculation unit 75 that determines a requested output of the battery based on the requested charge amount and the remaining time of the battery; a storage unit 73 that stores an upper limit output of each of the grid, the charger / discharger, and the battery; an upper limit output calculation unit 76 that calculates an upper limit output of each combination of the grid, the charger / discharger, and the battery based on the upper limit output of each of the grid, the charger / discharger, and the battery; and a combination determination unit 77 that determines arrangement of the charger / discharger and the battery on the grid based on the requested output of the battery and the upper limit output of each combination of the grid, the charger / discharger, and the battery.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a power management system and a power supply system.

Background Art

[0002] In recent years, a system has been proposed in which a battery and a charger are detachably connected between grids to conduct power transfer and charge / discharge. A planned charge value [kWh] is given to each battery based on the battery usage plan. The system determines an allocation method for the grid, charger, and battery to achieve the planned charge value of the requested battery.

[0003] A similar invention is described in Patent Document 1, which describes an invention in which when a planned battery charge / discharge value is requested from above, a charger to which the battery is to be connected is selected and a command value is determined. However, it should be noted that the maximum charge / discharge rate [kW] at each site is limited by the upper limit output of either the site or the charger.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Patent Document 1 describes a battery allocation for satisfying a planned charge value and a method for determining a charge / discharge command value. However, at this time, the maximum charge / discharge output is restricted by the performance of the grid and the charger. Also, in the invention described in Patent Document 1, although the charger is also detachable and movable, the allocation determination method in this case is not considered. By appropriately combining these grid, charger, and battery, it is considered possible to charge and discharge the battery by maximizing the capabilities of the grid and the charger.

[0006] Therefore, an object of the present invention is to determine an appropriate allocation of a grid, a charger, and a battery with respect to a required amount of charge of a battery.

Means for Solving the Problem

[0007] To solve the above problems, a power management system of the present invention is a power management system that determines an arrangement of chargers and batteries in a plurality of grids having fixed power sources, and includes: an input unit that receives an input of a required charge amount of the battery and a remaining time until the required charge amount is charged; an acquisition unit that acquires a current charge amount of the battery; a required output calculation unit that determines a required output of the battery based on the required charge amount of the battery and the remaining time until the required charge amount is charged; a storage unit that stores an upper limit output of the grid, an upper limit output of the charger, and an upper limit output of the battery; an upper limit output calculation unit that calculates an upper limit output of each combination of the grid, the charger, and the battery based on the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery stored in the storage unit; and a combination determination unit that determines an arrangement of the charger and the battery in the grid based on the required output of the battery and the upper limit output of each combination of the grid, the charger, and the battery.

[0008] The power supply system of the present invention is a power supply system including a power grid and a power management system. The power grid includes at least one of a plurality of grids having fixed power sources, a charger, and a battery. The charger includes a charger connection part for connecting the charger to the grid and a battery connection part for connecting the battery to the charger. An input part for inputting the current charge amount of the battery, the required charge amount of the battery, and the remaining time until the required charge amount; a required output calculation part for determining the required output of the battery based on the current charge amount of the battery, the required charge amount of the battery, and the remaining time until the required charge amount; a storage part for storing the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery; an upper limit output calculation part for calculating the upper limit output of each combination of the grid, the charger, and the battery based on the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery; and a combination determination part for determining the arrangement of the charger and the battery to the grid based on the required output of the battery and the upper limit output of each combination of the grid, the charger, and the battery. Other means will be described in the mode for carrying out the invention.

Effect of the Invention

[0009] According to the present invention, it is possible to determine an appropriate allocation of the grid, the charger, and the battery with respect to the required charge amount of the battery. In this allocation, it is possible to ensure the charge and discharge rate necessary for achieving the planned charge amount.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2A

Figure 2B

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Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

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Figure 12

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Figure 16

Modes for Carrying Out the Invention

[0011] Hereinafter, the modes for carrying out the present invention will be described in detail with reference to each figure. 《First Embodiment》 The power supply system of this embodiment calculates a required output based on battery reservation information, calculates a combined upper limit output for each combination of each grid, each charger, and each battery, and determines a combination of devices based on the required output and the combined upper limit output. Specifically, based on the battery reservation information, the power supply system calculates a required output, calculates a combined upper limit output for each combination of each grid, each charger, and each battery, and determines a combination of devices based on the required output and the combined upper limit output. Then, based on the battery reservation information, it determines a charger to connect the battery and charges the battery by determining a grid.

[0012] FIG. 1 is a configuration diagram of a power supply system 8 according to the first embodiment. The power supply system 8 is configured such that each power management device 2 at bases 1A to 1L is communicably connected to a power management system 7 and a battery reservation system 6 via the Internet 9. At base 1A, a power management device 2 and a grid 3A are installed, and chargers 4A, 4B and a battery 5 are detachably connected. When not particularly distinguishing each of the bases 1A to 1L, it is simply described as base 1. When not particularly distinguishing each of the grids 3A to 3L, it is simply described as grid 3.

[0013] The power management system 7 is configured as a server connected to the Internet 9 and determines the arrangement of chargers 4 and batteries 5 for a plurality of grids 3A to 3L having a fixed power source. The battery reservation system 6 is configured as a server connected to the Internet 9 and receives input of reservation information of the battery 5. At this time, the battery reservation information may be received from a user terminal 61 connected to the Internet 9. The battery reservation information received by the battery reservation system 6 is input to the power management system 7 via the Internet 9.

[0014] FIG. 2A shows a configuration diagram of base 1. At base 1, a grid 3 and a power management device 2 are installed. Chargers 4A, 4B are detachably connected to the grid 3. Note that a further charger 4 may be connected to the grid 3.

[0015] The battery 5 is detachably connected to the charger 4A. Note that the battery 5 may be connected to the charger 4B. When the chargers 4A and 4B are not particularly distinguished, they are simply described as the charger 4.

[0016] The grid 3 is composed of a grid management device 31, a power distribution system 32 and an AC / DC converter 321, and a solar power generation 33 and a DC / DC converter 331. The grid 3 further includes a wind power generation 34 and an AC / DC converter 341, a diesel power generation 35 and an AC / DC converter 351, a battery 36 and a DC / DC converter 361, a load 37 and an AC / DC converter 371, and connection parts 381 to 383.

[0017] Here, the solar power generation 33 and the wind power generation 34 are renewable energy power generation devices, and their current outputs change every moment according to the natural state. The load 37 is, for example, a motor, an air conditioner, lighting, etc., and its power consumption changes every moment.

[0018] The grid management device 31 determines the command values of the power distribution system 32, the solar power generation 33, the wind power generation 34, the diesel power generation 35, the battery 36, and the load 37. Note that the grid 3 shown in Fig. 2A is one of the configuration examples.

[0019] In this configuration diagram, each device is connected in a DC (direct current) system, but it may also be connected in an AC (alternating current) system. When connected in an AC system, DC power is supplied to the connection parts 381 to 383 from this AC system via an AC / DC converter.

[0020] The charger 4A connects the grid 3 and the battery 5 to charge and discharge this battery 5. Note that although the battery 5 is not connected to the charger 4B in Fig. 2A, another battery 5 may be connected here. Although nothing is connected to the connection part 383, another charger 4 may be connected here. The charger 4 includes a connection part 42, 44, a converter 43, and a charger management device 41. The charger 4 is connected to the grid 3 via the connection part 42 and is connected to the battery 5 via the connection part 44.

[0021] The charger management device 41 is communicably connected to the connection parts 42, 44 and the converter 43. The charger management device 41 acquires the power input to and output from the converter 43, the current flowing through the converter 43, the voltage generated in the converter 43, and the like.

[0022] The battery 5 includes a connection part 52, a battery module 53, and a battery management device 51. The battery 5 is connected to the charger 4 via the connection part 52. The battery management device 51 is communicably connected to the connection part 52 and the battery module 53. The battery management device 51 acquires the power input to and output from the battery module 53, the current flowing from the battery module 53, the voltage generated in the battery module 53, and the like.

[0023] The power management device 2 manages the power input to and output from the grid 3, the chargers 4A, 4B, and the battery 5, and determines a command value. The power management device 2 is communicably connected to the grid management device 31, the charger management device 41, and the battery management device 51.

[0024] The power management device 2 acquires any one of the power input to and output from the grid 3 by the grid management device 31, the current flowing through the grid 3, and the voltage generated in the grid 3. Similarly, the power management device 2 acquires any one of the power input to and output from the charger 4 by the charger management device 41, the current flowing through the charger 4, and the voltage generated in the charger 4. The power management device 2 acquires any one of the power input to and output from the battery 5 by the battery management device 51, the current flowing through the battery 5, and the voltage generated in the battery 5.

[0025] The configuration of the base 1 shown in Fig. 2A is an example. As shown in FIG. 2B, the power management device 2 at Site 1 may be communicably connected to the grid management device 31, the charger management device 41, and the battery management device 51 via the Internet 9.

[0026] As shown in FIG. 2C, the power management device 2 at Site 1 may be communicably connected to the charger management device 41 via the grid management device 31 and connection parts 381 - 383 and connection part 42, and may further be communicably connected to the battery management device 51 via connection parts 44 and 52. As shown in FIG. 2D, the power management device 2 at Site 1 may be directly communicably connected to the AC / DC converters 321, 341, 351, 371 and the DC / DC converters 331, 361 in the grid 3.

[0027] FIG. 3 shows a block diagram of the power management system 7. Based on the information of the battery reservation system 6, the power management system 7 determines the equipment combination of the grid 3, the charger 4, and the battery 5. As shown in FIG. 1, the power management system 7 is communicably connected to the battery reservation system 6 and the power management devices 2 at each site 1 via the Internet 9. The configuration shown in FIG. 3 is an example, and the power management system 7 may be directly connected to the battery reservation system 6 and the power management devices 2 at each site 1.

[0028] The power management system 7 includes an input unit 71, an acquisition unit 72, a storage unit 73, a calculation unit 74, and a command unit 78. The calculation unit 74 further includes a required output calculation unit 75, an upper limit output calculation unit 76, and a combination determination unit 77. The input unit 71 receives the input of the battery number, the required charge amount, and the remaining time from the battery reservation system 6. Instead of the input unit 71 receiving information input from the battery reservation system 6, the input unit 71 of the power management system 7 may directly receive the input of the battery number, the required charge amount, and the remaining time.

[0029] The acquisition unit 72 acquires from each power management device 2 the current charge amount of the battery 5, the battery position information indicating which base 1 the battery 5 is at, and the charger position information indicating which base the charger 4 is at, and stores them in the storage unit 73.

[0030] Figure 4 is the data table 731 stored in the storage unit 73. The data table 731 stores the device type, number, current base number, upper limit output, maximum connection number, allowable connection number, connection availability status, maximum charge amount, and current charge amount. This is just an example.

[0031] The device type describes information representing the types of devices such as "grid", "charger", and "battery". Among the numbers, the grid number is the number identifying each grid 3, and the same number as the number identifying the base 1 is assigned. The charger number is the number identifying each charger 4. The battery number is the number identifying each battery 5.

[0032] The current base number is the number identifying the base 1 where these grids 3, chargers 4, and batteries 5 exist. The upper limit output refers to the upper limit output restricted in the operation of each device, and is determined by the maximum output determined from the specifications of the grid 3, the charger 4, or the battery 5. In particular, the upper limit output of the grid 3 is obtained by subtracting the current output of the charger 4 connected to this grid 3 from the maximum output of this grid 3. Thereby, when a plurality of chargers 4 are connected to the grid 3, the battery 5 can be charged without exceeding the maximum output of the grid 3. This is just an example, and the upper limit output may be acquired from each power management device 2.

[0033] The maximum connection number is the maximum number of devices that can be connected to the device. The allowable connection number is the number of devices that can be currently connected to the device. The connection availability status indicates whether the device can be currently connected or not. The maximum charge amount indicates the maximum charge amount for the battery 5. The current charge amount indicates the current charge amount for the battery 5.

[0034] The data table 731 stored in the memory unit 73 is updated based on the numerical value transmitted from the acquisition unit 72. The allowable connection number is calculated as the number of connection parts among the connection parts 381 to 383 of the grid 3 that are not being used for charging and discharging. The grid connection availability status is shown as "No" when the allowable connection number is 0, and "Yes" when the allowable connection number is 1 or more.

[0035] The charger connection availability status is shown as "Yes" when the charger 4 is not in the charging and discharging state and can be moved and connected, and "No" otherwise. The battery connection availability status is shown as "Yes" when the battery 5 is not in the charging and discharging state and can be moved and connected, and "No" otherwise.

[0036] Returning to FIG. 3, the description will be continued. The arithmetic unit 74 includes a required output calculation unit 75, an upper limit output calculation unit 76, and a combination determination unit 77. The required output calculation unit 75 calculates the required output from the battery number, the required charge amount, the remaining time, and the current charge amount. Specifically, the required output calculation unit 75 subtracts the current charge amount from the required charge amount and divides by the remaining time to calculate the required output of the battery 5 indicated by the battery number.

[0037] FIG. 5 shows the combination upper limit output table 732 calculated by the upper limit output calculation unit 76. The grid connection availability status refers to the connection availability status of the grid 3. The charger connection availability status refers to the connection availability status of the charger 4. The battery connection availability status refers to the connection availability status of the battery 5.

[0038] The combination upper limit output is the upper limit output for the combination of the grid 3, the charger 4, and the battery 5, and the minimum value among the grid upper limit output of the grid 3, the charger upper limit output of the charger 4, and the battery upper limit output of the battery 5 is the upper limit output for the combination of the grid 3, the charger 4, and the battery 5.

[0039] The usability of the combination refers to the usability of the combination of the grid 3, the charger 4, and the battery 5. When all of the grid connection availability status, the charger connection availability status, and the battery connection availability status are "Yes", the usability of the combination is "Yes". When any one of the grid connection availability status, the charger connection availability status, and the battery connection availability status is "No", the usability of the combination is "No".

[0040] The upper limit output calculation unit 76 calculates the upper limit output and usability when these are combined for all combinations of the grid 3, the charger 4, and the battery 5. The upper limit output calculation unit 76 calculates the combined upper limit output from the grid upper limit output of the grid 3, the charger upper limit output of the charger 4, and the battery upper limit output of the battery 5. The upper limit output calculation unit 76 calculates the usability of the combination from the grid connection availability status of the grid 3, the charger connection availability status of the charger 4, and the battery connection availability status of the battery 5.

[0041] In addition, when the required charge amount is greater than the maximum charge amount, the battery connection availability status may be updated to "No". The combined upper limit output is determined as the minimum value of the grid upper limit output, the charger upper limit output, and the battery upper limit output.

[0042] Returning to FIG. 3, the description will continue. The combination determination unit 77 newly determines the required device combination based on the required output of the battery 5, the combined upper limit output of the combination of the grid 3, the charger 4, and the battery 5, and the usability of the combination. Further, the combination determination unit 77 outputs the required device combination and the required output to the command unit 78. The combination determination unit 77 determines, as the required device combination, the combination in which the combined upper limit output is greater than the required output among the combinations for which the usability of the combination is "Yes", and in which the difference between the required output and the combined upper limit output is the smallest. At this time, when the usability of all combinations is "No", it may be notified to the battery request system that reservation is not possible. This combination determination method is an example.

[0043] The combination determination unit 77 transmits the required device combination and the required output to the command unit 78. The instruction unit 78 receives a request output, a requested device combination, the position information of the charger 4, and the position information of the battery 5. Based on these input information, the instruction unit 78 transmits a charger movement command value for moving the charger 4, a battery movement command value for moving the battery 5, and a power command value for charging and discharging the battery. The charger movement command value is to move the charger 4 related to the requested device combination from the current position of this charger 4 to the base 1 where the grid 3 related to the requested device combination is located. The battery movement command value is to move the battery 5 related to the requested device combination from the current position of this battery 5 to the base 1 where the grid 3 related to the requested device combination is located.

[0044] Figure 6 is a flowchart showing the processing of the power management system 7. First, the input unit 71 receives a battery request command from the battery reservation system 6 via the Internet 9 and obtains the reservation information of the battery 5 (step S10). Then, when the input unit 71 receives the input of the battery number to be used, the required charge amount, and the remaining time, it transmits them to the request output calculation unit 75 (step S11). That is, the reservation information of the battery 5 is composed of the battery number to be used, the required charge amount, and the remaining time.

[0045] The acquisition unit 72 obtains the current charge amount, the battery position information, and the charger position information via the Internet 9 and stores them in the storage unit 73 (step S12). The request output calculation unit 75 calculates the request output from the battery number, the required charge amount, and the remaining time stored in the storage unit 73 and transmits it to the combination determination unit 77 (step S13).

[0046] The upper limit output calculation unit 76 calculates the combination upper limit output and the combination usability from the required charge amount, the grid upper limit output, the charger upper limit output, the battery upper limit output, and the maximum charge amount and transmits them to the combination determination unit 77 (step S14).

[0047] The combination determination unit 77 determines the required device combination from the required output, the combination upper limit output, and the availability of the combination (step S15), and transmits the required output and the required device combination to the command unit (step S16).

[0048] The command unit 78 calculates the charger movement command value and the battery movement command value from the required output, the required device combination, the charge / discharge position information, and the battery position information (step S17). When the command unit 78 further transmits the required output, the charger movement command value, and the battery movement command value to the outside (step S18), the process of FIG. 6 ends.

[0049] In the above-described first embodiment, the required output is calculated based on the reservation information of the battery 5, and the upper limit output of each combination is calculated from the upper limit output for each grid 3, each charger 4, and each battery 5. The required device combination is determined from the required output, the combination upper limit output, and the availability of the combination. As a result, when a reservation is made for the battery 5, the device combination can be changed to perform the necessary charge / discharge for this battery 5.

[0050] FIG. 7 shows the movement command screen 62. The movement command screen 62 is displayed, for example, on the display unit of the user terminal 61. A movement command pane 621 and a map pane 622 are displayed on this movement command screen 62. In the movement command pane 621, a reservation information column, a current information column, a required device combination column, and a command value column are displayed. Here, the charger movement command value and the battery movement command value are displayed in the command value column.

[0051] The reservation information column shows that a battery with battery number #1 and a required charge amount of 20 [kWh] is reserved at the reservation time of 17:00. The current information column shows that a battery with the base number of the battery 5 being #1 and the current charge amount being 10 [kWh] exists at the current time of 15:30. In the machine combination requirements column, it is shown that the base number is #2, the grid number is #2, the charger number of the charger 4 to be combined with this is #3, and the battery number of the battery 5 is #1.

[0052] In the command value column, it is shown that the required output is 5 [kW] and the remaining time is 2.5 hours. The charger number of the charger 4 is #1, indicating that it must move from base #1 to base #2. The battery number of the battery 5 is #3, indicating that it must move from base #3 to base #2.

[0053] On the map pane 622, on the map showing each base #1 to #4, an arrow from base #1 to base #2 corresponding to the charge and discharge movement command value and an arrow from base #3 to base #2 corresponding to the battery movement command value are displayed.

[0054] According to this embodiment, an appropriate allocation of the grid 3, the charger 4, and the battery 5 can be determined for the required charge amount of the battery 5. In this allocation, the charge and discharge speed required to achieve the planned charge amount can be ensured.

[0055] 《Second Embodiment》 In the above-described first embodiment, the upper limit output of the grid 3 stored in the storage unit 73 is determined from the maximum output of the specifications of the grid 3. However, when the charger 4 is connected to the grid 3 and is in the process of charging and discharging, the upper limit output of the grid 3 may be determined from the maximum output of the grid 3 and the current output of the charger 4. In the second embodiment, it is different from the first embodiment in that the current output of the charger 4 connected to the grid 3 is acquired and the upper limit output of the grid 3 is calculated.

[0056] FIG. 8 shows a block diagram of the power management system 7 of the second embodiment. The acquisition unit 72 acquires the current charge amount of the battery 5, the battery position information, the charger position information, and the current output of the charger 4 from each power management device 2, and stores them in the storage unit 73. The rest is the same as the block diagram shown in FIG. 3.

[0057] FIG. 9 shows the data table 733 stored in the storage unit 73. The data table 733 stores the device type, the numbers of the grid 3, the charger 4, and the battery 5, the current base number, the maximum output, the upper limit output, the maximum connection number, the allowable connection number, the connection availability status, the maximum charge amount, and the current charge amount. This is an example.

[0058] The maximum output of the data table 733 is the maximum output value determined from the specifications of each device. The maximum output of the grid 3 is determined from the specifications of the grid 3. The maximum output of the charger 4 is determined from the specifications of the charger 4. The maximum output of the battery 5 is determined from the specifications of the battery 5.

[0059] The upper limit output of the grid 3 is the result of subtracting the current output from the maximum output of this grid 3. And the current output of the grid 3 is equal to the sum of the current outputs of the chargers 4 connected to this grid 3. The upper limit output of the charger 4 is the result of subtracting the current output from the maximum output of this charger 4. The upper limit output of the battery 5 is the result of subtracting the current output from the maximum output of this battery 5. The rest is the same as the data table shown in FIG. 4.

[0060] In the above-described second embodiment, the upper limit output of the grid 3 is calculated based on the maximum output of the grid 3 and the current output of the charger 4 connected to this grid 3. Thereby, when charging and discharging are performed by connecting a plurality of chargers 4 to one grid 3, the total value of the current outputs of the plurality of chargers 4 can charge and discharge the battery 5 without exceeding the maximum output of the grid 3.

[0061] <<Third Embodiment>> In the above-described first embodiment, the upper limit output of Grid 3 stored in the storage unit 73 was determined from the maximum output of the specifications of Grid 3. At this time, the upper limit output of Grid 3 equipped with a renewable energy power source or a load may be determined from the power generation prediction and demand prediction of Grid 3.

[0062] In the third embodiment, it is different from the first embodiment in that the upper limit output of Grid 3 is determined from the predicted output of Grid 3 in the remaining time determined from the power generation prediction and demand prediction.

[0063] FIG. 10 shows a block diagram of the power management system 7 according to the third embodiment. The acquisition unit 72 acquires the remaining time from the input unit 71. The acquisition unit 72 further acquires from each power management device 2 the current charge amount of the battery 5, the battery position information, the charger position information, and the average grid predicted output in the remaining time, and stores them in the storage unit 73.

[0064] The grid predicted output is determined, for example, at each base 1 by subtracting the demand prediction of the load 37 from the power generation predictions of solar power generation 33 and wind power generation 34, which are renewable energy power generations. Note that this is an example, and the power management system 7 may perform predictions for each grid 3 and determine the grid predicted output. Also, when Grid 3 is equipped with solar power generation 33 or wind power generation 34 but not with load 37, the power generation predictions of solar power generation 33 and wind power generation 34, which are renewable energy power generations, are used as the grid predicted output. Also, when Grid 3 is not equipped with solar power generation 33 and wind power generation 34 but is equipped with load 37, the product of multiplying the demand prediction of load 37 by -1 is used as the grid predicted output.

[0065] FIG. 11 shows the data table 734 stored in the storage unit 73. The data table 734 stores the number of grid 3, the number of the charger 4, the number of the battery 5, the current base number, the predicted output, the upper limit output, the maximum connection number, the allowable connection number, the connection availability status, the maximum charge amount, and the current charge amount. This is just an example. The predicted output of the data table 734 is the same as the grid predicted output. The others are the same as the data table shown in FIG. 4.

[0066] FIG. 12 is a flowchart showing the processing of the power management system 7. The processing of steps S20 to S21 is the same as the processing of steps S10 to S11 shown in FIG. 6. Thereafter, the acquisition unit 72 acquires the remaining time and acquires the average grid predicted output at the remaining time (step S22). The processing of subsequent steps S23 to S29 is the same as the processing of steps S12 to S18 shown in FIG. 6.

[0067] In the above-described third embodiment, the acquisition unit 72 calculates the upper limit output of grid 3 based on the predicted output of grid 3 corresponding to the remaining time. Thereby, the upper limit output of grid 3 can be determined in reflection of the power generation amount of the renewable energy that changes moment by moment and the power demand amount of the load 37. Thereby, in grid 3 to which solar power generation 33 and wind power generation 34, which are renewable energy generations, and the load 37 are connected, a device combination for responding to the battery request command can be determined, and further charging and discharging of the battery 5 can be performed.

[0068] 《Fourth Embodiment》 In the above-described first embodiment, the combined upper limit output is determined from the grid upper limit output, the charger upper limit output, and the battery upper limit output.

[0069] At this time, the combined upper limit output may be further determined based on the time required for the movement of the charger 4 and the time required for the movement of the battery 5. In the fourth embodiment, the combination determination unit 77 differs from the first embodiment in that it changes the availability of the combination based on the charger 4 and the time required for the movement of the base 1 of the battery 5.

[0070] FIG. 13 shows a block diagram of the power management system 7 according to the fourth embodiment. The upper limit output calculation unit 76 acquires, from the input unit 71, in addition to the required charge amount, the remaining time. The upper limit output calculation unit 76 acquires, from the storage unit 73, in addition to the grid upper limit output, the charger upper limit output, the battery upper limit output, and the maximum charge amount, the charger position information, the battery position information, and the movement time.

[0071] FIG. 14 shows the movement time table 735 stored in the storage unit 73. The movement time table 735 stores the movement source base, the movement destination base, and the movement time required for moving from the movement source base to the movement destination base.

[0072] FIG. 15 shows the combination upper limit output table 736 calculated by the upper limit output calculation unit 76. The combination upper limit output table 736 includes, in addition to the columns similar to the combination upper limit output table 732 in FIG. 5, the required charge amount, the charger position information, the battery position information, the remaining time, the movement time, the charger movement time, the battery movement time, the chargeable time, the supplyable charge amount, and the changed combination upper limit output.

[0073] The required charge amount is the charge amount required for this battery 5. The charger position information is information indicating the location of the charger 4 combined with this battery 5. The battery position information is information indicating the location of this battery 5. The remaining time is the remaining time until this battery 5 is charged with the required charge amount.

[0074] The moving time is the time required to move this battery 5 and the charger 4 combined with this battery 5. The charger moving time is the time required to move the charger 4 combined with this battery 5. The battery moving time is the time required to move this battery 5.

[0075] The chargeable time is obtained by subtracting the moving time from the remaining time, and it is the time during which the battery 5 can be charged. The available charge amount is the power that can be supplied after charging this battery 5. The modified combination upper limit output is the upper limit output by the combination after reducing the time taken for movement.

[0076] The upper limit output calculation unit 76 uses the required charge amount, the remaining time, the moving time, the charger moving time, the battery moving time, the chargeable time, and the modified combination upper limit output. The required charge amount and the remaining time are acquired from the input unit 71.

[0077] The charger moving time is determined based on the base number, the charger position information, and the moving time acquired from the storage unit 73. The battery moving time is determined based on the base number, the battery position information, and the moving time acquired from the storage unit 73.

[0078] The chargeable time is determined based on the remaining time, the charger moving time, and the battery moving time. Among the charger moving time and the battery moving time, the one with the longer time is selected, and the value obtained by subtracting it from the remaining time is determined as the chargeable time.

[0079] The available charge amount is determined as the value obtained by multiplying the combination upper limit output by the chargeable time. The availability of the modified combination is determined from the availability of the combination, the required charge amount, and the available charge amount. When the available charge amount is smaller than the required charge amount, the one obtained by setting the availability of the combination to no is determined as the availability of the modified combination.

[0080] The combination determination unit 77 determines the required equipment combination based on the required output, the combination upper limit output, and the availability of the changed combination. In the fourth embodiment, the availability of the combination was changed based on the travel time and the available charge amount. As a result, considering the time required for the movement of the charger 4 and the battery 5, the equipment combination for responding to the battery request command can be determined, and the battery 5 can be charged and discharged using these combinations.

[0081] 《Fifth Embodiment》 In this embodiment, the battery 5 with the largest current charge amount is selected, and the number of the battery 5 and its placement at the base point 1 are determined.

[0082] FIG. 16 shows a block diagram of the power management system 7 according to the fifth embodiment. The input unit 71 receives the input of the required charge amount and the remaining time from the battery reservation system 6, but does not receive the input of the battery number.

[0083] The required output calculation unit 75 calculates the required output from the required charge amount and the remaining time. The required output calculation unit 75 calculates the required output by dividing the required charge amount by the remaining time. The combination determination unit 77 newly determines the required equipment combination based on the required output, the combination upper limit output, and the availability of the combination, and outputs the required equipment combination and the required output to the command unit 78. Here, the combination determination unit 77 determines the required equipment combination including the battery 5 with the largest current charge amount and the battery number of the battery 5.

[0084] The command unit 78 transmits the charger movement command value for moving the position of the charger 4, the battery movement command value for moving the position of the battery 5, the power command value for charging and discharging the battery, and the battery number of the battery 5 based on the required output, the required equipment combination, the charger position information, the battery position information, and the battery number.

[0085] The configuration and effects of this embodiment are described below. [1] A power management system (7) for determining the placement of chargers and batteries to a plurality of grids having a fixed power source, an input unit (71) that receives an input of a required charge amount of the battery and a remaining time until the required charge amount is charged; an acquisition unit (72) that acquires a current charge amount of the battery; a required output calculation unit (75) that determines a required output of the battery based on the required charge amount of the battery and the remaining time until the required charge amount is charged; a storage unit (73) that stores an upper limit output of the grid, an upper limit output of the charger, and an upper limit output of the battery; an upper limit output calculation unit (76) that calculates an upper limit output of each combination of the grid, the charger, and the battery based on the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery stored in the storage unit; a combination determination unit (77) that determines the placement of the charger and the battery to the grid based on the required output of the battery and the upper limit output of each combination of the grid, the charger, and the battery; A power management system (7), characterized by comprising the above.

[0086] Thereby, it is possible to determine an appropriate allocation of the grid, the charger, and the battery with respect to the required charge amount of the battery. In this allocation, it is possible to ensure a charge and discharge rate necessary for achieving a planned charge amount.

[0087] [2] The acquisition unit (72) further acquires position information of the charger and position information of the battery, and includes a command unit (78) that transmits a movement command value of the charger and the battery based on the placement of the charger and the battery to the grid determined by the combination determination unit (77). The power management system (7) according to claim 1, characterized by the above.

[0088] As a result, the power management system (7) can move the chargers and batteries at each site to a site with a grid that can appropriately charge them as needed for charging.

[0089] [3] When there is no combination of the grid, the charger, and the battery that satisfies the required output of the battery, the combination determination unit (77) corrects at least one of the required charge amount of the battery and the remaining time of the battery. The power management system (7) according to claim 1, characterized in that.

[0090] As a result, the power management system (7) can secure the remaining time required for charging or search for the required charge amount possible within the remaining time.

[0091] [4] The acquisition unit (72) further acquires connection availability information of the grid, connection availability information of the charger, and connection availability information of the battery. The combination determination unit (77) further determines the arrangement of the charger and the battery to the grid based on the connection availability information of the grid, the connection availability information of the charger, and the connection availability information of the battery acquired by the acquisition unit (72). The power management system (7) according to claim 1, characterized in that.

[0092] As a result, devices in combinations that cannot be connected can be excluded due to reasons such as being currently under charging.

[0093] [5] The acquisition unit (72) acquires combination use availability information indicating whether the charger is in a charging or discharging state, and combination use availability information indicating whether the battery is in a charging or discharging state. The combination determination unit (77) further determines the arrangement of the charger and the battery to the grid based on the combination use availability information of the charger and the combination use availability information of the battery acquired by the acquisition unit (72). The power management system (7) according to claim 1, characterized in that...

[0094] Thereby, due to reasons such as being currently under charging, combinations of devices that cannot be connected can be excluded.

[0095] [6] The storage unit (73) stores the maximum output of the grid, the maximum output of the charger, and the maximum output of the battery. Based on the maximum output of the grid, the maximum output of the charger, and the maximum output of the battery, the upper limit output calculation unit (76) determines the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery. The power management system (7) according to claim 1, characterized in that...

[0096] [7] The acquisition unit (72) acquires the current maximum output of the grid, the current maximum output of the charger connected to the grid, and the current maximum output of the battery connected to the grid. Based on the current maximum output of the grid acquired by the acquisition unit (72), the current maximum output of the charger connected to the grid, and the current maximum output of the battery connected to the grid, the upper limit output calculation unit (76) determines the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery. The power management system (7) according to claim 1, characterized in that...

[0097] Thereby, it is possible to calculate the upper limit output of the grid, charger, and battery from the maximum output in terms of the specifications of the grid, charger, and battery.

[0098] [8] The acquisition unit (72) acquires the current output of the charger connected to the grid and the current output of the battery connected to the grid. The upper limit output calculation unit (76) determines the upper limit output of the grid based on the current output of the charger and the current output of the battery acquired by the acquisition unit (72). The power management system (7) according to claim 1, characterized in that.

[0099] Thereby, even when a plurality of chargers and batteries are connected to one grid, charging and discharging of the battery can be performed within a range not exceeding the maximum output of the grid.

[0100] [9] The upper limit output calculation unit (76) determines the upper limit output of the grid based on at least one of the power generation prediction and demand prediction of renewable energy. The power management system according to claim 1, characterized in that.

[0101] Thereby, even when the output of the grid fluctuates moment by moment, an appropriate combination of charger and battery can be determined.

[0102]

[10] When the upper limit output calculation unit (76) moves the charger or the battery to another grid, it subtracts from the remaining time by the time required for the movement. The power management system according to claim 1, characterized in that.

[0103] Thereby, while considering the movement time, an appropriate allocation of the grid, charger, and battery can be determined for the required battery charge amount.

[0104]

[11] The charger connection part (42) connecting the charger and the grid and the battery connection part (44) connecting the battery and the charger are constituted by a DC circuit. The power management system according to claim 1, characterized in that.

[0105] Thereby, a DC voltage can be directly applied to the charger.

[0106]

[12] The grid, the charger, and the battery are each composed of a DC circuit and are charged and discharged by DC power. The power management system according to claim 1, characterized in that.

[0107] Accordingly, a DC voltage can be directly applied to the charger and the battery.

[0108]

[13] A power supply system (8) comprising a power system and a power management system (7), The power system includes at least one or more of a plurality of grids having a fixed power source, a charger, and a battery. The charger includes a charger connection portion (42) for connecting the charger to the grid and a battery connection portion (44) for connecting the battery to the charger. An input unit (71) for inputting the current charge amount of the battery, the required charge amount of the battery, and the remaining time until the required charge amount. A required output calculation unit (75) for determining the required output of the battery based on the current charge amount of the battery, the required charge amount of the battery, and the remaining time until the required charge amount. A storage unit (73) for storing the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery. An upper limit output calculation unit (76) for calculating the upper limit output of each combination of the grid, the charger, and the battery based on the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery. A combination determination unit (77) for determining the arrangement of the charger and the battery to the grid based on the required output of the battery and the upper limit output of each combination of the grid, the charger, and the battery. The power supply system (8), characterized by comprising.

[0109] Accordingly, it is possible to determine an appropriate allocation of the grid, the charger, and the battery with respect to the required charge amount of the battery. In this allocation, it is possible to ensure the charge and discharge rate necessary for achieving the planned charge amount.

[0110]

[14] A power management system for determining an allocation of a charger and a battery to a plurality of grids having a fixed power source, an input unit (71) for inputting the required charge amount of the battery and the remaining time until the required charge amount; a required output calculation unit (75) for determining a required output of the battery based on the required charge amount of the battery input by the input unit (71) and the remaining time until the required charge amount; a storage unit (73) for storing the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery; an upper limit output calculation unit (76) for calculating the upper limit output of each combination of the grid, the charger, and the battery based on the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery stored in the storage unit; and a combination determination unit (77) for determining the arrangement of the charger and the battery to the grid and the battery number to be used based on the required output of the battery and the upper limit output of each combination of the grid, the charger, and the battery. A power management system (7) characterized by the above.

[0111] Accordingly, it is possible to determine an appropriate allocation of the grid, the charger, and the battery with respect to the required charge amount of the battery. In this allocation, it is possible to ensure the charge and discharge rate necessary for achieving the planned charge amount.

[0112] (Modification example) The present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. It is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add, delete, or replace other configurations for a part of the configuration of each embodiment.

[0113] Each of the above configurations, functions, processing units, processing means, etc. may be realized by hardware such as an integrated circuit for a part or all of them. Each of the above configurations, functions, etc. may be realized by software by a processor interpreting and executing a program for realizing each function. Information such as a program, table, file, etc. for realizing each function can be placed in a recording device such as a memory, hard disk, SSD (Solid State Drive), or a recording medium such as a flash memory card, DVD (Digital Versatile Disk).

[0114] In each embodiment, control lines and information lines show those considered necessary for explanation, and do not necessarily show all control lines and information lines on the product. In reality, it may be considered that almost all configurations are interconnected.

Explanation of Reference Numerals

[0115] 1, 1A to 1L bases 2 Power management device 3, 3A to 3L grids 31 Grid management device 32 Power distribution system 321 AC / DC converter 33 Photovoltaic power generation 331 DC / DC converter 34 Wind power generation 341 AC / DC converter 35 Diesel power generation 351 AC / DC converter 36 Batteries 361 DC / DC Converter 37 Load 371 AC / DC Converter 381 Connection Part 382 Connection Part 383 Connection Part 4, 4A, 4B Charger / Discharger 4 Charger / Discharger 42 Connection Part 44 Connection Part 43 Converter 41 Charger / Discharger Management Device 5 Batteries 52 Connection Part 53 Battery Module 51 Battery Management Device 6 Battery Reservation System 61 User Terminal 62 Movement Instruction Screen 621 Movement Instruction Panel 622 Map Panel 7 Power Management System 71 Input Part 72 Acquisition Part 73 Memory Part 74 Arithmetic Part 78 Instruction Part 75 Required Output Calculation Part 76 Upper Limit Output Calculation Part 77 Combination Determination Part 731 Data Table 732 Combination Upper Limit Output Table 733 Data Table 734 Data Table 735 Movement Time Table 736 Combination Upper Limit Output Table 8 Power Supply System 9 Internet

Claims

1. A power management system for determining the placement of chargers and batteries for multiple grids having a fixed power source, comprising: an input unit that accepts an input of the required charge amount of the battery and the remaining time until the required charge amount is charged; an acquisition unit that acquires the current charge amount of the battery; a required output calculation unit that determines the required output of the battery based on the required charge amount of the battery and the remaining time until the required charge amount is charged; a storage unit that stores the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery; an upper limit output calculation unit that calculates the upper limit output of each combination of the grid, the charger, and the battery based on the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery stored in the storage unit; a combination determination unit that determines the placement of the charger and the battery to the grid based on the required output of the battery and the upper limit output of each combination of the grid, the charger, and the battery; A power management system characterized by comprising the above.

2. The acquisition unit further acquires the position information of the charger and the position information of the battery, and includes a command unit that transmits a movement command value of the charger and the battery based on the placement of the charger and the battery to the grid determined by the combination determination unit. The power management system according to claim 1, characterized by the above.

3. When there is no combination of the grid, the charger, and the battery that satisfies the required output of the battery, the combination determination unit corrects at least one of the required charge amount of the battery and the remaining time of the battery. The power management system according to claim 1, characterized by the above.

4. The acquisition unit further acquires connection availability information of the grid, connection availability information of the charger, and connection availability information of the battery, and the combination determination unit further determines the placement of the charger and the battery to the grid based on the connection availability information of the grid, the connection availability information of the charger, and the connection availability information of the battery acquired by the acquisition unit. The power management system according to claim 1, characterized by the above.

5. The acquisition unit acquires combination use permission information indicating whether the charger is in the process of charging and discharging, and combination use permission information indicating whether the battery is in the process of charging and discharging. The combination determination unit further determines the arrangement of the charger and the battery on the grid based on the combination use permission information of the charger and the combination use permission information of the battery acquired by the acquisition unit. The power management system according to claim 1, characterized in that.

6. The storage unit stores the maximum output of the grid, the maximum output of the charger, and the maximum output of the battery. The upper limit output calculation unit determines the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery based on the maximum output of the grid, the maximum output of the charger, and the maximum output of the battery. The power management system according to claim 1, characterized in that.

7. The acquisition unit acquires the current maximum output of the grid, the current maximum output of the charger connected to the grid, and the current maximum output of the battery connected to the grid. The upper limit output calculation unit determines the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery based on the current maximum output of the grid acquired by the acquisition unit, the current maximum output of the charger connected to the grid, and the current maximum output of the battery connected to the grid. The power management system according to claim 1, characterized in that.

8. The acquisition unit acquires the current output of the charger connected to the grid and the current output of the battery connected to the grid. The upper limit output calculation unit determines the upper limit output of the grid based on the current output of the charger and the current output of the battery acquired by the acquisition unit. The power management system according to claim 1, characterized in that.

9. The upper limit output calculation unit determines the upper limit output of the grid based on at least one or more of the power generation prediction and demand prediction of renewable energy. The power management system according to claim 1, characterized in that.

10. When the upper limit output calculation unit moves the charger or the battery to another grid, it reduces the remaining time by the time required for the movement. The power management system according to claim 1, characterized in that.

11. A charger connection part that connects the charger and the grid, and a battery connection part that connects the battery and the charger are constituted by a DC circuit. The power management system according to claim 1, characterized in that.

12. The grid, the charger, and the battery are each constituted by a DC circuit and are charged and discharged by direct current. The power management system according to claim 1, characterized in that.

13. A power supply system including a power grid system and a power management system, The power grid system includes at least one or more of a plurality of grids having a fixed power source, a charger, and a battery. The charger includes a charger connection part that connects the charger to the grid and a battery connection part that connects the battery to the charger. An input part for inputting the current charge amount of the battery, the required charge amount of the battery, and the remaining time until the required charge amount. A required output calculation part for determining the required output of the battery based on the current charge amount of the battery, the required charge amount of the battery, and the remaining time until the required charge amount. A storage part for storing the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery. An upper limit output calculation part for calculating the upper limit output of each combination of the grid, the charger, and the battery based on the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery. A combination determination part for determining the arrangement of the charger and the battery to the grid based on the required output of the battery and the upper limit output of each combination of the grid, the charger, and the battery. A power supply system characterized by comprising.

14. A power management system for determining the allocation of a charger and a battery to a plurality of grids having a fixed power source, An input part for inputting the required charge amount of the battery and the remaining time until the required charge amount. A required output calculation part for determining the required output of the battery based on the required charge amount of the battery input by the input part and the remaining time until the required charge amount. A storage part for storing the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery. An upper limit output calculation unit that calculates the upper limit output of each combination of the grid, the charger, and the battery based on the upper limit output of the grid, the upper limit output of the charger, and the upper limit output of the battery stored in the memory unit; A combination determination unit that determines the arrangement of the charger and the battery on the grid and the battery number to be used based on the required output of the battery and the upper limit output of each combination of the grid, the charger, and the battery. A power management system characterized by the above.

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