JP2014064449A - Power management device, power management method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To slow down progress of deterioration of storage batteries by decreasing the number of times of charging to and discharging from the storage battery in a unit time in a power management system comprising solar batteries and the storage batteries in combination.SOLUTION: Storage batteries for solar batteries and storage batteries for midnight power are selected out of a plurality of storage batteries by utilizing prediction results of a total generated power prediction part which predicts total generated power as a total of generated power generated in one day in a predetermined area range and total demand power as a total of demand power in one day, total surplus power as a surplus of the total generated power, a calculation result of total chargeable capacity of a plurality of storage batteries in the predetermined area range, and storage battery parameters. Then the storage batteries for solar batteries and the storage batteries for midnight power are charged and discharged in every predetermined period in a control object period, respectively.

Description

  The present invention relates to a power management apparatus, a power management method, and a program.

In recent years, power management systems including a power generation device using natural energy such as solar power generation and a storage battery have been known.
The following is known as a load control device in such a power management system. That is, this load control device predicts the power generation amount and load amount of the solar power generation device. Then, the load control device calculates the operation schedule of the device so that the surplus power of the power generation amount of the photovoltaic power generation device is reduced according to the predicted power generation amount and the predicted load amount, and stores it from a commercial power source that is inexpensive at night. Calculate the amount of power. Then, the load control device performs device operation control and power storage device charge amount control according to these calculation results (see, for example, Patent Document 1).

JP 2007-295680 A

  In the above configuration, for example, in a unit period of one day (24 hours), first, the commercial power supply is charged to the storage battery in the midnight time zone, and then stored by this charging in the morning time zone, for example. Discharge for supplying the generated power to the load is performed. In addition, during the day after this, charging of the power generated by the solar power generator is performed on the storage battery, and then, for example, at night time, the power stored by this charging is supplied to the load. Is discharged. That is, the storage battery in this configuration repeats the charge / discharge cycle twice in one day.

  It is known that the storage battery is deteriorated every time charging / discharging is performed and its life is shortened. Therefore, like the storage battery in the configuration of Patent Document 1, the fact that charging / discharging is performed twice in one day means that the number of times of charging / discharging is compared with the case where charging / discharging is performed once in one day, for example. Is doubled, and the life of the storage battery is shortened to almost half.

  The present invention has been made in view of such circumstances, and in a power management system in which a solar battery and a storage battery are combined, the number of times of charging / discharging the storage battery in a unit period is reduced, and the deterioration of the storage battery is progressed. The purpose is to relax.

  In order to solve the above-described problem, a power management apparatus as one aspect of the present invention combines generated power generated by a plurality of solar cells provided in a predetermined area range in a predetermined control target period after the current time. A total generated power prediction unit that predicts total generated power, and a total demand power prediction unit that predicts total demand power that is a sum of demand power in the control target period for loads provided in the predetermined area range, A total surplus power calculating unit that calculates a total surplus power that is a surplus of the total generated power based on the total generated power and the predicted total demand power, and each of the plurality of storage batteries provided in the predetermined area range For each of the plurality of storage batteries, and a total chargeable capacity calculation unit that obtains the chargeable capacity from Using the storage battery parameter storage unit that stores the predetermined parameters as storage battery parameters, the calculated total chargeable capacity, the calculated total surplus power, and the storage battery parameters read from the storage battery parameter storage unit, A storage battery selection unit that selects one or more storage batteries for solar cells and one or more storage batteries for midnight power from among the storage batteries, and commercial use for the storage battery for midnight power in the first period of the control target period The power of the power source is charged, the power stored in the storage battery for midnight power is discharged in the second period in the control target period, and the commercial power for the storage battery for the solar cell in the third period in the control target period The power of the power source is charged and accumulated in the storage battery for the solar cell in the fourth period in the control target period And a battery control unit for controlling so as to discharge the power.

  In the power management apparatus of the present invention, the storage battery selection unit calculates a midnight power storage amount to be stored in the storage battery in the control target period based on the calculated total chargeable capacity and the calculated total surplus power. Then, the storage battery for the midnight power may be selected based on the calculated midnight power storage amount and the storage battery parameter, and the solar battery storage battery may be selected based on the total surplus power and the storage battery parameter.

  Further, in the power management apparatus of the present invention, the storage battery selection unit may select one of storage battery capacity, storage battery charge rate, storage battery remaining life information, and storage battery deterioration progress information as the storage battery parameters. The above may be used.

  Further, the power management method as one aspect of the present invention is a total power generation method for predicting a total generated power obtained by summing generated power generated in a predetermined control target period after a current time by a plurality of solar cells provided in a predetermined area range. A generated power prediction step, a total demand power prediction step of predicting a total demand power totaling demand power in the control target period for a load provided in the predetermined area range, and the predicted total generated power is predicted. A total surplus power calculating step for calculating a total surplus power that is a surplus of the total generated power based on the total demand power, and obtaining a chargeable capacity from each of the plurality of storage batteries provided in the predetermined area range. , A total chargeable capacity calculation step for calculating a total chargeable capacity by totaling the acquired chargeable capacity, and the calculated total chargeable capacity Using the calculated total surplus power and a storage battery parameter that is a predetermined parameter for each of the plurality of storage batteries read from the storage battery parameter storage unit, one or more storage batteries for solar cells among the plurality of storage batteries A storage battery selection step of selecting one or more midnight power storage batteries, charging the commercial power to the midnight power storage battery in the first period of the control target period, and second in the control target period The power accumulated in the storage battery for midnight power in the period is discharged, the power of the commercial power supply for the storage battery for the solar battery is charged in the third period in the control target period, and the fourth in the control target period. The storage battery control step for controlling the electric power stored in the storage battery for the solar battery to be discharged during the period of And a flop.

  In addition, the program as one aspect of the present invention predicts, in a computer, total generated power that is a sum of generated power generated by a plurality of solar cells provided in a predetermined area range in a predetermined control target period after the current time. A total generated power prediction step, a total demand power prediction step of predicting a total demand power totaling the demand power in the control target period for the load provided in the predetermined area range, and the predicted total generated power and the prediction A total surplus power calculation step for calculating a total surplus power that is a surplus of the total generated power based on the total demand power thus obtained, and obtaining a chargeable capacity from each of the plurality of storage batteries provided in the predetermined area range A total chargeable capacity calculation step for calculating a total chargeable capacity by combining the obtained chargeable capacity, and a calculated One or more solar cells out of the plurality of storage batteries using a storage capacity, a calculated total surplus power, and storage battery parameters that are predetermined parameters for each of the plurality of storage batteries read from the storage battery parameter storage unit A storage battery selection step of selecting a storage battery for the battery and one or more storage batteries for midnight power; and charging a power of a commercial power source for the storage battery for midnight power in the first period in the control target period; Discharging power stored in the storage battery for midnight power in the second period of the period, charging power of commercial power to the storage battery for solar cell in the third period of the control target period, and controlling the control target Control to discharge the electric power stored in the storage battery for the solar cell in the fourth period of the period It is intended for executing a battery control step.

  As described above, according to the present invention, in a power management system in which a solar battery and a storage battery are combined, the number of times of charging / discharging the storage battery in a unit period is reduced, and the progress of deterioration of the storage battery can be mitigated. The effect is obtained.

It is a figure which shows the structural example of the power management system in this embodiment. It is a figure which shows the example of charging / discharging control of the storage battery at the time of performing charging / discharging of late-night electric power and charging / discharging of the generated electric power of a solar cell about each storage battery in an electric power management area. It is a figure which shows the structural example of the power management apparatus in this embodiment. It is a figure which shows the example of the table of the storage battery parameter in this embodiment. It is a figure which shows the example of charging / discharging control about the storage battery for midnight power in this embodiment. It is a figure which shows the example of charging / discharging control about the storage battery for solar cells in this embodiment. It is a figure which compares and shows progress of deterioration of a storage battery by the case where charging / discharging of late-night electric power and charging / discharging of the generated electric power of a solar cell are performed about each storage battery, and the case of this embodiment. It is a figure which shows the example of a process sequence which the power management apparatus in this embodiment performs for selection of a storage battery. It is a figure which shows the example of a process sequence which the power management apparatus in this embodiment performs for the charge / discharge control of the storage battery for midnight power. It is a figure which shows the example of a process sequence which the power management apparatus in this embodiment performs for the charge / discharge control of the storage battery for solar cells.

[Example of overall configuration of power management system]
FIG. 1 shows an example of the overall configuration of a power management system in an embodiment of the present invention. The power management system according to the present embodiment collectively manages power in customer facilities such as houses, commercial facilities, and industrial facilities corresponding to a plurality of customers in a predetermined region. Such a power management system corresponds to a so-called TEMS (Town Energy Management System), CEMS (Community Energy Management System), or the like.

  The power management system according to the present embodiment performs power management for electric equipment for each customer facility 10 in a predetermined area range shown as a power management area 1 in FIG. The customer facility 10 corresponds to, for example, a house, a commercial facility, or an industrial facility. The commercial power supply 2 is branched and supplied to each of these customer facilities 10.

  One customer facility 10 includes, for example, a solar battery 101, a power conditioner 102, a storage battery 103, an inverter 104, a power path switching unit 105, a load 106, and a facility-specific control unit 107.

  The solar cell 101 is a power generation device (solar power generation device) that converts light energy into electric power by the photovoltaic effect. The solar cell 101 converts sunlight into electric power by being installed in a place where sunlight can be efficiently received, such as the roof of the customer facility 10.

  The power conditioner 102 converts DC power output from the solar battery 101 into AC.

  The storage battery 103 accumulates electric power input for charging, and discharges and outputs the accumulated electric power. As the storage battery 103, for example, a lithium ion battery can be employed.

The inverter 104 is provided corresponding to each of the plurality of storage batteries 103, and performs AC / DC conversion of power for charging the storage battery 103 or DC / AC conversion of power output from the storage battery 103 by discharging. That is, bidirectional conversion of power input / output by the storage battery 103 is performed.
Specifically, when charging the storage battery 103, AC power for charging is supplied to the inverter 104 from the commercial power supply 2 or the power conditioner 102 via the power path switching unit 105. The inverter 104 converts the AC power supplied in this way into DC and supplies it to the storage battery 103.
Further, when the storage battery 103 is discharged, DC power is output from the storage battery 103. The inverter 104 converts the DC power output from the storage battery 103 to AC and supplies the AC power to the power path switching unit 105.

The power path switching unit 105 switches the power path according to the control of the facility-specific control unit 107. At this time, the facility-specific control unit 107 can control the power path switching unit 105 in accordance with an instruction from the power management apparatus 200.
In accordance with the above control, the power path switching unit 105 can form a power path so as to supply the commercial power source 2 to the load 106 in the same customer facility 10.

In addition, the power path switching unit 105 can form a power path so that the power generated by the solar cell 101 is supplied from the power conditioner 102 to the load 106 in the same customer facility 10.
Further, the power path switching unit 105 forms a power path in the same customer facility 10 so as to charge the storage battery 103 via the inverter 104 with power supplied from one or both of the commercial power source 2 and the solar battery 101. Can do.
Further, the power path switching unit 105 can form a power path in the same customer facility 10 so that power output from the storage battery 103 by discharging is supplied to the load 106 via the inverter 104.

Furthermore, the power path switching unit 105 sets the power path so that the power generated by the solar battery 101 is supplied to the storage battery 103 in another customer facility 10 via the power system of the commercial power source 2, for example. Can be formed.
Further, the power path switching unit 105 can form a power path so as to supply the power output by the discharge of the storage battery 103 to the load 106 in the other customer facility 10.

  The load 106 collectively indicates devices and facilities that consume power in order to operate themselves in the customer facility 10.

  The facility-specific control unit 107 controls electrical equipment (all or part of the solar cell 101, the power conditioner 102, the storage battery 103, the inverter 104, the power path switching unit 105, and the load 106) in the customer facility 10.

  The power management apparatus 200 executes power control for the electrical equipment in the entire customer facility 10 belonging to the power management area 1. For this reason, the power management apparatus 200 in FIG. 1 is connected so as to be able to communicate with each of the facility-specific control units 107 in the customer facility 10. Thereby, the power management apparatus 200 can control the electrical equipment under the management of the facility-specific control unit 107 by controlling the facility-specific control unit 107.

  Note that, for example, the facility-specific control unit 107 may be omitted, and the power management apparatus 200 may directly control electrical facilities and the like in each customer facility 10. However, in this embodiment, the power management apparatus 200 and the facility-specific control unit 107 are provided, and the control of the power management apparatus 200 is complicated by stratifying the control in the entire power management area 1 and the customer facility 10. Is avoiding.

Thus, in the present embodiment, a plurality of solar cells 101 and a plurality of storage batteries 103 are provided in the power management area 1.
However, some of the customer facilities 10 in the power management area 1 may not include the solar battery 101, the storage battery 103, and the inverter 104, for example. Further, the number of solar cells 101 and the number of storage batteries 103 provided in the power management area 1 do not have to be the same and may be different.

  The storage battery 103 in the present embodiment is a facility provided in the customer facility 10, but is not used individually for each customer facility 10. In the power management system of the present embodiment, the power stored in the storage battery 103 can be supplied also to the loads 106 of other customer facilities 10 in the power management area 1. That is, the stored power of the storage battery 103 is used so as to be interchanged between the loads 106 of the customer facility 10 in the power management area 1.

For example, when the weather is good during the daytime, the power generated by the solar cell 101 may be larger than the power required by the load 106 in the power management area 1. At this time, the generated power of the solar cell 101 in the power management area 1 becomes surplus. In the present embodiment, such surplus power of the solar battery 101 is stored in the storage battery 103. In addition, in charging the surplus power of the solar battery 101 to the storage battery 103, not only the generated power of the solar battery 101 in the same customer facility 10 but also the generated power of the solar battery 101 in another customer facility 10 Can be charged.
For example, at night when power cannot be generated by the solar battery 101, the power stored in the storage battery 103 by the surplus power of the solar battery 101 is supplied to the load 106 of the customer facility 10 in the power management area 1. As described above, the power management system of the present embodiment performs local production and local consumption of power by using the solar battery 101 and the storage battery 103 on the scale of the power management area 1.

  In addition, the power management system according to the present embodiment accumulates the power (midnight power) supplied from the commercial power source 2 in the storage battery 103 in the midnight time zone (for example, from 23:00 to about 7:00 on the next day) when the power demand is low. To do. Then, for example, in the morning time zone when the power demand increases in the morning, the midnight power stored in the storage battery 103 at midnight is supplied to the load 106 in the power management area 1. Thus, the power management system of the present embodiment performs power load leveling by using midnight power at the scale of the power management area 1.

In using the storage battery 103 as described above, for each storage battery 103 in the power management area 1, accumulation (charging) of the generated power of the solar battery 101 and supply (discharge) of the accumulated power to the load 106, Assume that storage (charging) of late-night power and supply (discharge) of the stored power to the load 106 are performed.
In this case, the charge / discharge cycle (charge and subsequent discharge) of one storage battery 103 in one day is as shown in FIG. That is, the storage battery 103 is charged with midnight power in the midnight time zone, and then is discharged to supply the load 106 with the power accumulated by the midnight power charging in the morning time zone. Next, the storage battery 103 is charged with the electric power generated by the solar battery 101 in the daytime period, and then discharged to supply the accumulated electric power to the load 106 in the nighttime period.
In this case, the storage battery 103 has two charge / discharge cycles per day. The performance of the storage battery 103 deteriorates every time charging / discharging is performed, and its life is shortened. Such deterioration of the performance of the storage battery 103 appears as a decrease in the storage capacity during full charge, for example. The time when the storage capacity at the time of full charge becomes a certain ratio or less with respect to the new time is when the life of the storage battery 103 is lost.

  In order to mitigate the progress of such deterioration of the storage battery 103, for example, in the power management area 1, the storage battery 103 is not subjected to either accumulation of surplus power of the solar battery 101 or accumulation of late-night power. It is possible. However, if the surplus power of the solar cell 101 is not accumulated, local production and consumption of power cannot be realized, and if the late-night power is not accumulated, the power load leveling cannot be promoted.

Therefore, in the power management system of this embodiment, the storage battery 103 for solar cells and the storage battery 103 for late-night power are individually selected from the plurality of storage batteries 103 in the power management area 1. This selection is performed, for example, every day (24 hours).
And about the storage battery 103 selected as an object for solar cells, it is utilized only for accumulation | storage of the surplus electric power of the solar cell 101, and supply to the load 106 of the accumulated electric power on the 1st.
Further, the storage battery 103 selected for midnight power is used only for storing midnight power and supplying the stored power to the load 106 in one day.

[Configuration example of power management device]
FIG. 3 shows a configuration example of the power management apparatus 200. In the configuration shown in this figure, the power management apparatus 200 selects the solar battery and the late-night power among the storage batteries 103 in the power management area 1, and stores (charges) power and stores the stored power in the selected storage battery 103. This is for controlling the supply (discharge) to the load 106.

  The power management apparatus 200 illustrated in FIG. 3 includes a total generated power prediction unit 201, a total generated power prediction usage information storage unit 202, a total demand power prediction unit 203, a total demand power prediction usage information storage unit 204, and a total surplus power calculation unit 205. , Total storage capacity calculation unit 206, storage battery selection unit 207, storage battery parameter storage unit 208, storage battery parameter acquisition unit 209, storage battery control unit 210, and communication unit 211.

The total generated power prediction unit 201 predicts the total generated power. The total generated power is a total of the generated power generated by a plurality of solar cells 101 provided in the power management area 1 in a predetermined control target period after the current time. Further, the control target period here is, for example, the next day (24 hours), which starts from the start time of the midnight time zone shown in FIG. 2 and ends at the end time of the night time zone. To finish.
Further, the total generated power prediction unit 201 uses the total generated power prediction usage information stored in the total generated power prediction usage information storage unit 202 in predicting the total generated power. The total generated power prediction usage information includes, for example, information on weather forecast for one day as a control target period, information on specifications for power generation for each solar cell 101 provided in the power management area 1, For example, information indicating the result of total generated power.

For example, the total generated power prediction unit 201 predicts the generated power in the control target period for each solar cell 101 provided in the power management area 1 using the total generated power prediction usage information.
Next, the total generated power prediction unit 201 outputs a value obtained by adding the predicted generated power for each solar cell 101 as a prediction result of the total generated power.

The total demand power prediction unit 203 predicts the total demand power obtained by integrating the demand power in the control target period for the loads provided in the power management area 1 (all loads 106 in the power management area 1).
The total demand power prediction unit 203 uses the total demand power prediction usage information stored in the total demand power prediction usage information storage unit 204 in predicting the total demand power. The total demand power forecast usage information includes, for example, weather forecast information for one day as a control target period, information on specifications related to power consumption for each load 106 in the power management area 1, and total demand for each day so far For example, information indicating the power record.

  For example, the total demand power prediction unit 203 predicts the power used in the control target period for each load 106 provided in the power management area 1 using the total demand power prediction usage information. Next, the total demand power prediction unit 203 outputs a value obtained by adding the predicted power used for each load 106 as a prediction result of the total demand power.

The total surplus power calculation unit 205 is based on the total generated power predicted by the total generated power prediction unit 201 and the total demand power predicted by the total demand power prediction unit 203. Calculate power. The total surplus power is the surplus power that is not consumed by all the loads 106 in the power management area 1 in the total generated power.
For example, the total surplus power calculation unit 205 calculates the total surplus power by subtracting the total demand power from the total generated power. When the total generated power is smaller than the total demand power, the total surplus power calculation unit 205 may obtain a negative total surplus power. A negative total surplus power indicates that the total generated power is insufficient with respect to the total demand power.

The total chargeable capacity calculation unit 206 acquires the chargeable capacity of each of the plurality of storage batteries 103 provided in the power management area 1 and calculates the total chargeable capacity by combining the acquired chargeable capacity.
The chargeable capacity of the storage battery 103 is the amount of power that can be further accumulated until the storage battery 103 is fully charged under the current state of charge, for example, the charge amount when the storage battery 103 is fully charged. From this, it is obtained by subtracting the amount of power stored in the storage battery 103. The total chargeable capacity is the sum of the chargeable capacity for each of the plurality of storage batteries 103 in the power management area 1.

The total chargeable capacity calculation unit 206 notifies the chargeable capacity of the storage battery 103 to the facility-specific control unit 107 of the customer facility 10 including the storage battery 103 when acquiring the chargeable capacity from each of the plurality of storage batteries 103. Send a request.
Upon receiving this notification, the facility-specific control unit 107 calculates the accumulable capacity of the storage battery 103 provided in the same facility-specific control unit 107, and transmits the calculated accumulable capacity to the power management apparatus 200. The total chargeable capacity calculation unit 206 acquires the chargeable capacity for each storage battery 103 received by the communication unit 211, and calculates the total chargeable capacity by adding the acquired chargeable capacity.

The storage battery selection unit 207 selects the storage battery 103 for solar cells and the storage battery 103 for late-night power from among the plurality of storage batteries 103 in the power management area 1.
For this purpose, the storage battery selection unit 207 reads from the storage battery parameter storage unit 208 the total storageable capacity calculated by the total storage capacity calculation unit 206, the total surplus power calculated by the total surplus power calculation unit 205, and the like. Use storage battery parameters.

The storage battery parameter storage unit 208 stores a predetermined parameter for each of the plurality of storage batteries 103 provided in the power management area 1 as a storage battery parameter.
The storage battery parameter storage unit 208 stores storage battery parameters in a table format, for example, as shown in FIG. This table has a structure in which the storage battery parameter value for the corresponding storage battery 103 is stored for each storage battery ID that uniquely identifies the storage battery 103.

For example, the storage battery selection unit 207 selects the storage battery 103 for late-night power as follows.
In selecting the storage battery 103, the storage battery selection unit 207 first calculates the amount of late-night power storage using the total chargeable capacity and the total surplus power.
The late-night power storage amount is the total amount of late-night power to be stored in the storage battery 103 in the power management area 1 in the control target period. For example, since the amount of power that can be stored in the storage battery 103 by the surplus power of the solar cell 101 during the day increases as the predicted total surplus power increases, the amount of power stored at midnight may be small. Conversely, as the predicted total surplus power decreases, the amount of power that can be stored in the storage battery 103 due to surplus power generated during the day decreases, so that the amount of power stored in the middle of the night can be increased.
As one of the simplest specific examples, the storage battery selection unit 207 can calculate the midnight power storage amount by subtracting the total surplus power from the total chargeable capacity.

  Next, the storage battery selection unit 207 selects the storage battery 103 for midnight power based on the calculated midnight power storage amount and storage battery parameters. In the description here, it is assumed that the storage battery parameter is a chargeable capacity of the storage battery 103.

  The storage battery selection unit 207 selects the plurality of storage batteries 103 in the power management area 1 as the storage battery 103 for late-night power in descending order of the power storage capacity. Then, the selection is completed when the total amount of the chargeable capacity of the storage battery 103 selected for midnight power becomes equal to or greater than the midnight power storage amount.

By selecting the storage battery 103 having a large chargeable capacity preferentially in this way, it is possible to store midnight power with as few storage batteries 103 as possible. Thereby, the frequency | count of charging / discharging of the storage battery 103 in the power management area 1 within a unit period can be suppressed.
When the total surplus power is greater than or equal to the total chargeable capacity, the midnight power charge amount is “0” or a negative number. In this case, it is estimated that power corresponding to the total chargeable capacity can be stored in the storage battery 103 by the predicted total surplus power without depending on the late-night power.
Therefore, in this case, the storage battery 103 for late-night power may not be selected and the late-night power may not be stored. However, in this case, for example, it may be difficult to stably supply sufficient power from the storage battery 103 to the load 106 in the morning time zone. Therefore, when the minimum power for selecting the storage battery 103 for midnight power is determined in advance, and the amount of stored midnight power is “0” or a negative number, the storage battery for midnight power with the minimum power is used. It is good also as a process which selects 103 in an order from a thing with a large storage capacity.

  Next, the storage battery selection part 207 selects the storage battery 103 for solar cells, for example as follows. That is, the storage battery selection unit 207 selects, for example, the storage battery 103 for the solar battery in descending order of the storage capacity, from the storage batteries 103 other than those selected for the late-night power. And selection is complete | finished in the stage in which the total amount of the electrical storage capacity of the storage battery 103 selected as an object for solar cells became more than total surplus electric power. If the total surplus power is greater than or equal to the total chargeable capacity, the value of the total chargeable capacity is substituted into the total surplus power, and then the total chargeable capacity of the storage battery 103 selected for the solar cell is substituted. The selection may be completed when the total surplus power is exceeded.

In the above example, the storage battery 103 for solar cells is selected after selecting the storage battery 103 for midnight power. Conversely, the storage battery for midnight power is selected after selecting the storage battery 103 for solar cells. 103 may be selected. For which of the storage battery 103 for late-night power and the storage battery 103 for solar battery should be selected first, for example, according to various conditions, priority is given to the use of late-night power or the use of the generated power of the solar battery. It may be based on the result of determining whether to make it.
Further, for example, the order of selection of the storage battery 103 for midnight power and the selection of the storage battery 103 for solar battery may be changed in accordance with the ratio of the total chargeable capacity and the total surplus power.
Furthermore, for example, after selecting one storage battery 103 for midnight power (or for solar cells), one storage battery 103 for solar cells (or for midnight power) is selected, and this procedure is repeated. You may make it choose to.

The storage battery parameter acquisition unit 209 acquires storage battery parameters for each storage battery. For this purpose, the storage battery parameter acquisition unit 209 performs communication for requesting storage battery parameters from the facility-specific control unit 107 of the customer facility 10 including the storage battery 103 via the communication unit 211.
The facility-specific control unit 107 that has received this request acquires the storage battery parameters of the storage battery 103 installed in the same customer facility 10. For example, when the storage battery parameter is a chargeable capacity, the facility-specific control unit 107 acquires the chargeable capacity as status information from the storage battery 103, for example. Then, the facility-specific control unit 107 transmits the acquired storage battery parameter to the power management apparatus 200. The storage battery parameter transmitted in this way is received by the communication unit 211. The storage battery parameter acquisition unit 209 stores the storage battery parameter received by the communication unit 211 in the table in association with the storage battery ID of the corresponding storage battery 103.

The storage battery control unit 210 controls the charging and discharging of the storage battery 103 for solar cells selected by the storage battery selection unit 207 and the charging and discharging of the storage battery 103 for late-night power selected by the storage battery selection unit 207. Control in the target period.
That is, the storage battery control unit 210 performs control so that the power of the commercial power supply for the storage battery 103 for midnight power is charged in the first period (midnight time period) in the control target period.
In addition, the storage battery control unit 210 controls to discharge the power stored in the storage battery for late-night power in the second period (morning time zone) in the control target period.
In addition, the storage battery control unit 210 performs control so that the power of the commercial power supply for the storage battery 103 for solar cells is charged in the third period (daytime) in the control target period.
Further, the storage battery control unit 210 controls to discharge the electric power accumulated in the storage battery for solar cells in the fourth period (night time zone) in the control target period.

  In this control, the storage battery control unit 210 first instructs the facility-specific control unit 107 of the customer facility 10 including the storage battery 103 selected for midnight power to charge the power of the commercial power source 2 in the midnight time zone. To do. In response to this instruction, the facility-specific control unit 107 controls the storage battery 103 provided in the same customer facility 10 so that the power of the commercial power supply 2 is charged in the midnight time zone.

  In addition, the storage battery control unit 210 instructs the facility-specific control unit 107 of the customer facility 10 including the storage battery 103 selected for midnight power to supply power by the storage battery 103 in the morning time zone. In response to this instruction, the facility-specific control unit 107 discharges the power stored in the late-night power storage battery 103 provided in the same customer facility 10 in the morning time zone to load the load 106 in the power management area 1. Control to supply.

In addition, the storage battery control unit 210 instructs the facility-specific control unit 107 of the customer facility 10 including the storage battery 103 selected for midnight power to stop the operation of the storage battery 103 in the daytime and night hours. . In response to this instruction, the facility-specific control unit 107 stops the charging / discharging operation of the storage battery 103 for late-night power provided in the same customer facility 10 in the daytime and nighttime periods.
For example, depending on the situation such as the power required by the load 106, the facility-specific control unit 107 continues to pull the storage battery 103 for late-night power provided in the same customer facility 10 from the morning time zone and the daytime zone. You may make it discharge after that.

  In addition, the storage battery control unit 210 instructs the facility-specific control unit 107 of the customer facility 10 including the storage battery 103 selected for the solar battery to charge the power generated by the solar cell 101 in the daytime. . In response to this instruction, the facility-specific control unit 107 charges the storage battery 103 provided in the same customer facility 10 with the power generated by the solar cell 101 in the power management area 1 in the daytime period. To control.

  In addition, the storage battery control unit 210 instructs the facility-specific control unit 107 of the customer facility 10 including the storage battery 103 selected for solar cells to supply power by the storage battery 103 in the night time zone. In response to this instruction, the facility-specific control unit 107 discharges the electric power stored in the solar cell storage battery 103 provided in the same customer facility 10 in the night time period to load the load 106 in the power management area 1. To control the supply.

In addition, the storage battery control unit 210 instructs the facility-specific control unit 107 of the customer facility 10 including the storage battery 103 selected for solar cells to stop the operation of the storage battery 103 in the midnight time period and the morning time period. . In response to this instruction, the facility-specific control unit 107 stops the charging / discharging operation of the storage battery 103 for solar cells provided in the same customer facility 10 in the midnight time zone and the morning time zone.
For example, according to the situation such as the power required by the load 106, the facility-specific control unit 107 continues to pull the storage battery 103 for the value battery provided in the same customer facility 10 from the previous night time zone. You may make it discharge even after midnight time zone.

Note that the midnight time zone may be set in advance in consideration of, for example, the performance of the time zone in which the power usage of the entire load 106 decreases below a certain level in the power management area 1, or the electricity bill May be started according to the start time at which midnight is charged.
Further, each of the start time and end time of the morning time zone may be set according to, for example, the end time of the midnight time zone and the start time of the day time zone.
The start time of the daytime zone may be set in advance. Alternatively, the daytime period starts at a timing when the amount of power generated by the solar cell 101 in the power management area 1 increases as the sun rises and the sunlight increases, and actual surplus power is generated. The storage battery control unit 210 may also control.
The start time of this night time zone may be set in advance. Alternatively, this night time period is started, for example, at a timing when the amount of power generated by the solar cell 101 in the power management area 1 decreases as the sun's sunshine weakens, and no actual total surplus power is generated. Thus, the storage battery control unit 210 may control.

[Pattern example of charge / discharge operation of storage battery]
FIG. 5 shows a charge / discharge pattern performed by the storage battery 103 for late-night power in the control target period (one day) in accordance with the control of the storage battery control unit 210 described above.
According to this figure, the storage battery 103 for late-night power first charges the power of the commercial power supply 2 (late-night power) in the late-night time zone.
In the morning time zone, the storage battery 103 for late-night power discharges to supply the power stored in itself to the load 106 in the power management area 1.
Next, the late-night power storage battery 103 stops its charge / discharge operation over the following daytime and nighttime periods.

FIG. 6 shows a charge / discharge pattern that the storage battery 103 for solar cell power performs in the control target period (one day) in accordance with the control of the storage battery control unit 210 described above.
According to this figure, the storage battery 103 for solar cells stops its charge / discharge operation over the midnight time zone and the morning time zone in one day.
Next, in the daytime, the storage battery 103 for solar cells charges the generated power of the solar cell 101 in the power management area 1.
Next, in the night time zone, the storage battery 103 for solar cells performs discharge for supplying the power stored therein to the load 106 in the power management area 1.

According to FIG. 5, the charge / discharge cycle of the storage battery 103 for late-night power in one day is one. Similarly, according to FIG. 6, the charging / discharging cycle of the storage battery 103 for solar cells in one day is also one.
In the present embodiment, the storage battery 103 in the power management area 1 is used to store the generated power of the solar battery 101 and supply the stored power to the load 106, and to store the late-night power and load of the stored power. It is possible to supply to 106. In addition, the charge / discharge cycle of the storage battery 103 used for this purpose is once per day. On the other hand, the charge / discharge cycle in the case of FIG. 2 is twice per day. Compared with FIG. 2, in this embodiment, the number of charge / discharge cycles (number of charge / discharge) per unit time is reduced to ½. As a result, the progress of deterioration of the storage battery 103 provided in the power management area 1 is alleviated, and the service life is extended.

  FIG. 7 is a diagram comparing the progress of deterioration of the storage battery 103 in the present embodiment with the progress of deterioration when the storage battery 103 is used as shown in FIG. In FIG. 7, the vertical axis represents the storage capacity at full charge, and the horizontal axis represents the usage time. Further, the progress of the deterioration of the storage battery 103 in the present embodiment is indicated by a solid line f1, and the progress of the deterioration of the storage battery 103 due to the use shown in FIG. 2 is indicated by a broken line f2. In addition, the new level in the storage capacity indicates the value of the storage capacity of the new storage battery 103, and the replacement level in the storage capacity indicates the value of the storage capacity that needs to be replaced when the life of the storage battery 103 is exhausted.

  As can be seen by comparing the solid line f1 and the broken line f2, the storage battery 103 in the present embodiment and the storage battery 103 by use shown in FIG. 2 have the same storage capacity (new level). However, the degree to which the storage capacity decreases as the usage time elapses is smaller in the storage battery 103 in the embodiment than in the storage battery 103 by use shown in FIG. Thereby, for example, the period during which the storage capacity decreases from the new level to the replacement level is extended to about twice that of the storage battery 103 used in the present embodiment as shown in FIG. Accordingly, for example, in this embodiment, the number of times the storage battery 103 is replaced in the unit period is also almost halved as compared to the case where the storage battery 103 shown in FIG. 2 is used. For example, the running cost of the power management system is reduced. It can be effectively reduced.

The flowchart in FIG. 8 illustrates an example of a processing procedure executed by the power management apparatus 200 of the present embodiment for selecting the storage battery 103 for solar cells and the storage battery 103 for midnight power.
In the power management apparatus 200, for example, the total generated power prediction unit 201 waits for the selection time to select the storage battery 103 for solar cells and late-night power (step S101—NO).
In addition, what is necessary is just to set the time of the fixed time before the selection time, for example with respect to the start time of a midnight time zone.

In response to reaching the selection time (step S101—YES), the total generated power prediction unit 201 predicts the total generated power in the control target period of the solar cell 101 provided in the power management area 1 (step S102).
Next, the total demand power prediction unit 203 predicts the total demand power in the control target period (step S103). The total demand power thus predicted is power that is predicted to be used by the entire load 106 in the power management area 1 within the control target period.

  Next, the total surplus power calculation unit 205 calculates the surplus of the total generated power based on the total generated power predicted by the total generated power prediction unit 201 and the total demand power predicted by the total demand power prediction unit 203. A certain total surplus power is calculated (step S104). For example, as described above, the total surplus power calculation unit 205 can calculate the total surplus power by subtracting the total demand power from the total generated power.

  Next, the total chargeable capacity calculation unit 206 calculates the total chargeable capacity (step S105). At this time, as described above, the total chargeable capacity calculation unit 206 is configured to communicate with the facility-specific control unit 107 of the customer facility 10 via the communication unit 211, so that the plurality of storage batteries 103 provided in the power management area 1 are provided. The chargeable capacity is obtained from each of the above. Then, the total chargeable capacity calculation unit 206 calculates the total chargeable capacity by adding the acquired chargeable capacity.

The subsequent steps S106 to S108 are an example of a processing procedure executed by the storage battery selection unit 207 to select the storage battery 103 for late-night power and the storage battery 103 for solar battery.
For this purpose, the storage battery selection unit 207 calculates a midnight power storage amount (step S106).
Next, the storage battery selection unit 207 selects the storage battery 103 for midnight power based on the midnight power storage amount and the storage battery parameter calculated in step S106 (step S107).
As described above, when the storage battery parameter is the accumulable capacity of the storage battery 103, the storage battery selection unit 207 selects in order from the storage battery 103 with the larger accumulable capacity as step S107. Then, the storage battery selection unit 207 ends the selection when the total amount of the chargeable capacity of the selected storage battery 103 becomes equal to or greater than the midnight power storage amount.

Next, the storage battery selection unit 207 selects the storage battery 103 for solar cells from the storage batteries 103 other than those selected for midnight power based on the total surplus power and storage battery parameters predicted in step S104. (Step S108).
When the storage battery parameter is the accumulable capacity of the storage battery 103 as described above, the storage battery selection unit 207 determines, for example, from the storage batteries 103 other than those selected for late-night power as step S108, for example, in descending order of the accumulable capacity. Make a selection. Then, the storage battery selection unit 207 ends the selection when the total amount of the chargeable capacity of the selected storage battery 103 becomes equal to or greater than the total surplus power.

The flowchart in FIG. 9 is an example of a processing procedure for the storage battery control unit 210 to control the charge / discharge operation of the storage battery 103 for late-night power selected in step S107 in FIG.
The storage battery control unit 210 determines whether or not the current time is included in the midnight time zone (step S201). When the current time is included in the midnight time zone (step S201—YES), the storage battery control unit 210 performs control so that the power of the commercial power supply 2 is charged to the storage battery 103 for midnight power ( Step S202).

When the current time is not included in the midnight time zone (step S201—NO), the storage battery control unit 210 further determines whether or not the current time is included in the morning time zone (step S203).
When the current time is included in the morning time zone (step S203—YES), the storage battery control unit 210 discharges the power stored in the storage battery 103 for midnight power, and uses the discharged power in the power management area. 1 is executed (step S204).
When the current time is not included in the morning time zone (step S203—NO), the current time is included in the day time zone or the night time zone. In this case, the storage battery control unit 210 controls to stop the charging / discharging operation of the storage battery 103 selected for midnight power (step S205).

The flowchart in FIG. 10 is an example of a processing procedure for the storage battery control unit 210 to control the charge / discharge operation of the storage battery 103 for solar cells selected in step S108 in FIG.
The storage battery control unit 210 determines whether or not the current time is included in the daytime zone (step S301). When the current time is included in the daytime zone (step S301—YES), the storage battery control unit 210 is charged with the generated power of the solar battery 101 in the power management area 1 for the storage battery 103 for solar battery. Control is executed as described above (step S302).

If the current time is not included in the daytime zone (step S301-NO), the storage battery control unit 210 further determines whether or not the current time is included in the nighttime zone (step S303).
When the current time is included in the night time zone (step S303-YES), the storage battery control unit 210 discharges the power stored in the storage battery 103 for solar cells, and uses the discharged power in the power management area. 1 is executed (step S304).
When the current time is not included in the night time zone (step S303—NO), the current time is included in the midnight time zone or the morning time zone. In this case, the storage battery control unit 210 controls to stop the charging / discharging operation of the storage battery 103 selected for the solar battery (step S305).

[Modification]
In the present embodiment, information other than the above-described accumulable capacity of the storage battery 103 can be applied to the storage battery parameter used when the storage battery selection unit 207 selects the storage battery 103 for midnight power and the storage battery 103 for solar battery.
Therefore, in the following, an example of an information type that can be used as a storage battery parameter and a selection example of the storage battery 103 for each information type as a storage battery parameter will be described as modified examples of the present embodiment.

A 1st modification is an example using the charging rate of the storage battery 103 as a storage battery parameter.
The charging rate indicates, for example, the remaining amount of power stored in the storage battery 103 by a ratio with the amount of stored power when fully charged. This charging rate is also called, for example, SOC (State Of Charge).
When the charging rate is used as the storage battery parameter, the storage battery selection unit 207 can select, for example, the storage battery 103 for late-night power and solar battery in order from the storage battery 103 having the lowest charging rate.
For example, the state where the charging rate is low is one of the factors that promote the deterioration of the storage battery 103. By selecting the storage battery 103 in ascending order of the charging rate, the storage battery 103 can be recovered from a state with a low charging rate, so that the progress of deterioration of the storage battery 103 due to a state with a low charging rate can be mitigated. .

The second modification is an example in which SOL (State Of Life) of the storage battery 103 is used as the storage battery parameter.
The SOL is an index (remaining life information) indicating the current remaining life with respect to the life of the storage battery 103. For example, the total charge amount flowing in and out of the storage battery 103 until the storage battery 103 reaches the end of life, and the storage battery 103 until now. It can be determined based on the amount of charge flowing in and out.
When SOL is used as a storage battery parameter, the storage battery selection unit 207 can select, for example, the storage battery 103 having a large SOL value, that is, the storage battery 103 for late-night power and solar cells in order from the storage battery 103 having a long remaining life. . The longer the remaining battery life 103 is, the less the deterioration proceeds, and the performance (for example, charge / discharge efficiency) of the storage battery 103 is higher. Then, if the storage battery 103 is selected in an order from the storage battery 103 with a large SOL value, the storage battery 103 with high performance can be selected from the storage batteries 103 in the power management area 1.

Further, the third modification is an example in which SOH (State Of Health) of the storage battery 103 is used as the storage battery parameter.
SOH is an index indicating the soundness of the storage battery 103. For example, the storage battery 103 deteriorates by repeated charging and discharging, but for the storage battery 103, the allowable number of times of charging / discharging that can maintain the required performance is obtained by, for example, a preliminary test. The SOH can be obtained as a ratio of the remaining number of charge / discharges (the number of remaining charge / discharges) up to the allowable charge / discharge number at present to the allowable charge / discharge number. In this case, the larger the SOH value, the greater the number of remaining charge / discharge cycles, indicating that the storage battery 103 is healthy. Conversely, the smaller the value of SOH, the more the storage battery 103 is deteriorated and the soundness is lowered. In this respect, the SOH is one of indices (deterioration progress information) indicating the progress of the deterioration of the storage battery 103.
When SOH is used as a storage battery parameter, the storage battery selection unit 207, for example, a storage battery 103 having a large SOH value, that is, a storage battery for late-night power and a solar battery, in order from the storage battery 103 having high soundness and not deteriorated. 103 can be selected. Thereby, it is possible to select a storage battery 103 that is sounder and has higher performance from the storage batteries 103 in the power management area 1.

The fourth modification is an example in which the capacity deterioration rate of the storage battery 103 is used as the storage battery parameter.
The capacity deterioration rate is one of indicators (deterioration progress information) indicating the progress of deterioration of the storage battery 103, and is obtained, for example, as a reduction rate of the current storage capacity at the time of full charge with respect to the storage capacity at the time of initial full charge. .
When the capacity deterioration rate is used as the storage battery parameter, the storage battery selection unit 207, for example, the storage battery 103 having a small capacity deterioration rate, that is, the storage battery 103 for late-night power and solar cells in order from the storage battery 103 in which the deterioration has not progressed. Can be selected. Thereby, the storage battery 103 with a low degree of deterioration and high performance can be selected from the storage batteries 103 in the power management area 1.

  Note that, for example, in the case of adopting a policy of replacing the storage battery 103 whose deterioration has progressed to some extent due to maintenance reasons, for example, deterioration indicated by, for example, SOL, SOH, capacity deterioration rate, etc. The storage battery 103 for late-night power and solar battery may be selected in order from the storage battery 103 having a larger degree of progress. Thereby, the lifetime of the storage battery 103 can be shortened, and the replacement time of the storage battery 103 can also be advanced.

Further, for example, the storage battery 103 may be selected by using two or more of the accumulable capacity, SOC, SOL, SOH, capacity deterioration rate, and the like listed as the storage battery parameters so far.
As an example, when the accumulable capacity and SOL are combined, the storage battery 103 can be selected as follows. That is, the storage battery selection unit 207 basically selects the storage battery 103 in descending order of the capacity that can be stored. In addition, the storage battery selection unit 207 selects the storage battery 103 having the largest SOL when, for example, a plurality of storage batteries 103 having an equivalent chargeable capacity become selection candidates.
Further, for example, in selecting the storage battery 103 for midnight power, it is possible to adopt a concept that the change in the charging rate tends to be large depending on the charging at midnight. In this case, it is preferable to select a storage battery 103 that is not deteriorated as much as possible and can store as much power as possible for the storage battery 103 for midnight power. Therefore, the storage battery selection unit 207 selects the storage battery 103 for midnight power from a storage battery having a small capacity deterioration rate and a large chargeable capacity (small storage ratio (SOC)) for the storage battery 103 for midnight power. You may do it.

  In addition, the control target period in the present embodiment is, for example, one day (24 hours) starting from a midnight time zone, but may be a period other than one day, such as half a day, two days, and the like.

  3 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read by the computer system and executed to select a storage battery. And may be controlled. Here, the “computer system” includes an OS and hardware such as peripheral devices.

Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Power management area 2 Commercial power supply 10 Consumer facility 101 Solar cell 102 Power conditioner 103 Storage battery 104 Inverter 105 Power path switching unit 106 Load 107 Facility-specific control unit 200 Power management device 201 Total power generation prediction unit 202 Total power generation prediction Information storage unit 203 Total demand power prediction unit 204 Total demand power prediction usage information storage unit 205 Total surplus power calculation unit 206 Total chargeable capacity calculation unit 207 Storage battery selection unit 208 Storage battery parameter storage unit 209 Storage battery parameter acquisition unit 210 Storage battery control unit 211 Communication department

Claims (5)

A total generated power prediction unit that predicts a total generated power that is a sum of generated power generated by a plurality of solar cells provided in a predetermined area range in a predetermined control target period after the current time;
A total demand power prediction unit that predicts a total demand power summed up the demand power in the control target period for the load provided in the predetermined area range;
A total surplus power calculating unit that calculates a total surplus power that is a surplus of the total generated power based on the predicted total generated power and the predicted total demand power;
A total chargeable capacity calculating unit that obtains a chargeable capacity from each of the plurality of storage batteries provided in the predetermined area range, and calculates a total chargeable capacity by combining the acquired chargeable capacity;
A storage battery parameter storage unit that stores a predetermined parameter for each of the plurality of storage batteries as a storage battery parameter;
Using the calculated total chargeable capacity, the calculated total surplus power, and the storage battery parameter read from the storage battery parameter storage unit, one or more storage batteries for solar cells and one or more of the plurality of storage batteries A storage battery selection unit that selects a storage battery for midnight power of
Charging the power of the commercial power source for the midnight power storage battery in the first period of the control target period, discharging the power stored in the midnight power storage battery in the second period of the control target period, Charging the power of the commercial power source for the solar battery storage battery in the third period of the control target period, and discharging the power stored in the solar battery storage battery in the fourth period of the control target period A storage battery control unit that controls the power management device. The storage battery selection unit
Based on the calculated total chargeable capacity and the calculated total surplus power, a midnight power storage amount to be stored in the storage battery in the control target period is calculated, and based on the calculated midnight power storage amount and the storage battery parameter Select the storage battery for midnight power,
The power management apparatus according to claim 1, wherein a storage battery for the solar battery is selected based on the total surplus power and the storage battery parameter. The storage battery selection unit
3. The power management according to claim 1, wherein at least one of a storage battery capacity, a storage battery charging rate, a storage battery remaining life information, and a storage battery deterioration progress information is used as the storage battery parameter. apparatus. A total generated power prediction step for predicting the total generated power by combining the generated power generated by a plurality of solar cells provided in a predetermined area range in a predetermined control target period after the current time;
A total demand power prediction step of predicting a total demand power obtained by integrating the demand power in the control target period for the load provided in the predetermined area range;
A total surplus power calculating step of calculating a total surplus power that is a surplus of the total generated power based on the predicted total generated power and the predicted total demand power;
A total chargeable capacity calculating step of acquiring a chargeable capacity from each of the plurality of storage batteries provided in the predetermined area range, and calculating a total chargeable capacity by combining the acquired chargeable capacity;
Using the calculated total storage capacity, the calculated total surplus power, and a storage battery parameter that is a predetermined parameter for each of the plurality of storage batteries read from the storage battery parameter storage unit, from among the plurality of storage batteries, A storage battery selection step of selecting one or more storage batteries for solar cells and one or more storage batteries for midnight power;
Charging the power of the commercial power source for the midnight power storage battery in the first period of the control target period, discharging the power stored in the midnight power storage battery in the second period of the control target period, Charging the power of the commercial power source for the solar battery storage battery in the third period of the control target period, and discharging the power stored in the solar battery storage battery in the fourth period of the control target period And a storage battery control step for controlling the power. On the computer,
A total generated power prediction step for predicting the total generated power by combining the generated power generated by a plurality of solar cells provided in a predetermined area range in a predetermined control target period after the current time;
A total demand power prediction step of predicting a total demand power obtained by integrating the demand power in the control target period for the load provided in the predetermined area range;
A total surplus power calculating step of calculating a total surplus power that is a surplus of the total generated power based on the predicted total generated power and the predicted total demand power;
A total chargeable capacity calculating step of acquiring a chargeable capacity from each of the plurality of storage batteries provided in the predetermined area range, and calculating a total chargeable capacity by combining the acquired chargeable capacity;
Using the calculated total storage capacity, the calculated total surplus power, and a storage battery parameter that is a predetermined parameter for each of the plurality of storage batteries read from the storage battery parameter storage unit, from among the plurality of storage batteries, A storage battery selection step of selecting one or more storage batteries for solar cells and one or more storage batteries for midnight power;
Charging the power of the commercial power source for the midnight power storage battery in the first period of the control target period, discharging the power stored in the midnight power storage battery in the second period of the control target period, Charging the power of the commercial power source for the solar battery storage battery in the third period of the control target period, and discharging the power stored in the solar battery storage battery in the fourth period of the control target period A storage battery control step for controlling the program.

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