JP6899807B2 - Aggregator device, program and supply / demand adjustment method to control the charge / discharge power of each storage battery - Google Patents

Description

The present invention relates to a technique of an aggregator device that controls the charge / discharge electric energy of each of a plurality of storage batteries according to the supply / demand adjustment electric energy.

FIG. 1 is a system configuration diagram in the prior art.

Conventionally, in order to balance the supply and demand of electric power, there is a technique in which not only the power generation side unilaterally adjusts the supply and demand of electric power but also the storage battery on the consumer side is charged and discharged by remote control.
According to FIG. 1, it is assumed that the aggregator device (electric power intermediary company) 1 has acquired the electric power usage information of each storage battery 3 of the consumer in advance.
The electric power company system 2 transmits a supply and demand adjustment request based on the supply and demand adjustment electric energy to the aggregator device 1. On the other hand, the aggregator device 1 calculates the charge / discharge electric energy in the storage battery 3 of each consumer based on the supply / demand adjustment electric energy, and transmits the charge / discharge electric energy to each storage battery 3. The storage battery 3 charges and discharges electric power according to the amount of charged and discharged electric power received.

In addition, the management server (aggregator function) divides the charge / discharge power required in the specified area from the remaining amount of each storage battery in the consumer equipment (energy storage device). There is also a technique for calculating (see, for example, Patent Document 1). According to this technology, the consumer-side equipment receives the share ratio from the management server, and calculates the share power amount to be charged and discharged by the storage battery based on the share ratio. Then, the storage pond controls charge / discharge according to the amount of shared power.

Japanese Patent No. 6183576

However, according to the prior art, in order to calculate the charge / discharge power amount and the sharing ratio for each storage battery, the calculation amount increases as the number of storage batteries to be controlled increases. As a result, the calculation time becomes long, and the latest power usage information (for example, the remaining amount) of each storage battery cannot be reflected in the calculation result.
For example, it is not possible to request the storage battery of a consumer to discharge more than the remaining amount.
If it takes 2 hours to calculate the sharing ratio of all the storage batteries, it will be calculated from the power usage information of each storage battery up to 2 hours ago. In that case, the remaining amount of the storage battery may already be low.
That is, if the calculation is not performed using the latest power usage information, an error will occur between the supply / demand adjustment power amount and the total charge / discharge power amount of each storage battery.

Therefore, in the present invention, regarding the determination of the charge / discharge electric energy for each storage battery according to the supply / demand adjustment electric energy, even if the number of storage batteries to be controlled increases, the calculation amount in the selection of the storage battery and the determination of the charge / discharge electric energy. It is an object of the present invention to provide an aggregator device, a program, and a supply / demand adjustment method capable of suppressing

According to the present invention, in an aggregator device that controls the charge / discharge electric energy of each of a plurality of storage batteries according to the supply and demand adjustment electric energy.
A storage battery database that associates power usage information with each storage battery,
A group definition means for defining each group by repeating the formation of m groups including n members in k steps while incrementing n.
Group construction means that fits storage batteries with similar power usage information as members of each group under the constraints of the defined group.
A group selection means for selecting a combination of groups so that the sum of the chargeable and dischargeable electric energy of each storage battery is close to the charge and discharge electric energy of the entire request, which can be calculated from the demand adjustment electric energy.
Each storage battery in the combined group is characterized by having a storage battery control means for instructing the amount of charge / discharge power.

According to another embodiment of the aggregator device of the present invention.
Group definition means
Number of group members: n, nmin ≤ n ≤ nmax
nmin ≧ 1, nmax> 1
Number of groups with the same number of members n: m
Stage of group with the same number of members n: k (ascending order from the group with the smallest number of members)
Member increment rate between group stages: U (1 <U≤2)
Number of members in the group with k = 1: scale (1) = nmin
Number of members in the kth group: scale (k) = floor { U × scale (k-1)}
floor {}: Rounded-up integer Number of members in the Kth group: scale (K) ≤ nmax
It is also preferable to repeat the K step while incrementing n until the total number of members in all groups becomes equal to or greater than the total number of storage batteries.

According to another embodiment of the aggregator device of the present invention.
It is also preferable that the group forming means form a group in which storage batteries having similar power usage information are clustered so as to satisfy the constraint on the number of members of each defined group.

According to another embodiment of the aggregator device of the present invention.
It is also preferable that the group forming means form a group by a dendrogram.

According to another embodiment of the aggregator device of the present invention.
It is also preferable that the group forming means reconstructs the group at predetermined time intervals or when the predetermined conditions are satisfied.

According to another embodiment of the aggregator device of the present invention.
The group selection method is
Select multiple combinations of groups for the same demand-adjusted energy
It is also preferable to change the combination of groups each time a request for the same demand adjustment electric energy is received.

According to another embodiment of the aggregator device of the present invention.
The group selection method is
Priority is set for each item of power usage information,
Priority is given to each group based on each power usage information of all storage batteries included in the group.
It is also preferable to select a combination of groups so that the total charge / discharge electric energy of each storage battery is close to the demand adjustment electric energy in order from the group having the highest priority.

According to another embodiment of the aggregator device of the present invention.
It is also preferable that the power usage information includes the rated capacity as equipment data and / or the remaining amount as actual data in addition to the amount of power that can be charged and discharged.

According to another embodiment of the aggregator device of the present invention.
It is also preferable that the storage battery control means divides the charge / discharge power amount of the group into each storage battery equally.

According to the present invention, in a program for operating a computer mounted on a device that controls the charge / discharge electric energy of each of a plurality of storage batteries according to the supply / demand adjustment electric energy.
A storage battery database that associates power usage information with each storage battery,
A group definition means for defining each group by repeating the formation of m groups including n members in k steps while incrementing n.
Group construction means that fits storage batteries with similar power usage information as members of each group under the constraints of the defined group.
A group selection means for selecting a combination of groups so that the total charge / discharge electric energy of each storage battery is close to the charge / discharge electric energy of the entire request, which can be calculated from the demand adjustment electric energy.
Each storage battery in the combined group is characterized by having a computer function as a storage battery control means for instructing the amount of charge / discharge power.

According to the present invention, in the supply and demand adjustment control method of a device that controls the charge / discharge electric energy of each of a plurality of storage batteries according to the supply and demand adjustment electric energy.
The device is
Each storage battery has a storage battery database that associates power usage information.
The first step of defining each group by repeating the formation of m groups including n members in k steps while incrementing n, and
Under the constraints of the defined groups, the second step of fitting storage batteries with similar power usage information as members of each group,
The third step of selecting a combination of groups so that the total charge / discharge amount of each storage battery is close to the charge / discharge amount of the entire request, which can be calculated from the demand adjustment power amount, and
Each storage battery in the combined group is characterized by performing a fourth step of instructing the amount of charge / discharge power.

According to the aggregator device, the program, and the supply / demand adjustment method of the present invention, the storage battery can be selected and the storage battery can be selected even if the number of storage batteries to be controlled increases in determining the charge / discharge power amount for each storage battery according to the supply / demand adjustment power amount. The amount of calculation in determining the amount of charge / discharge power can be suppressed.
In particular, even if the number of storage batteries increases, the amount of calculation is suppressed and the calculation time does not become long. Therefore, it can be calculated using the new power usage information of each storage battery, and the error between the supply / demand adjustment power amount and the total charge / discharge power amount of each storage battery can be reduced.

It is a system block diagram in the prior art. It is a system block diagram in this invention. It is a functional block diagram of the aggregator apparatus in this invention. This is a storage battery database that represents power usage information for each storage battery. It is explanatory drawing which shows the processing of the group definition part in this invention. It is explanatory drawing which shows the processing of the group constituent part in this invention. It is explanatory drawing which shows the chargeable electric energy for each group. It is explanatory drawing which shows the processing of the group selection part in this invention. It is a graph which shows the processing time with respect to the number of storage batteries.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a system configuration diagram in the present invention.

<Power company system 2>
The electric power company system 2 transmits a "supply and demand adjustment request" to the aggregator device 1.
The supply and demand adjustment request includes "supply and demand adjustment electric energy" and "time". For example, it is as follows.
Time 2018/4/1 12:00 Supply and demand adjustment request "2018/4/1 13: 00-13: 30, 140kWh, discharge"
The time interval for updating the charge / discharge power amount is set to 30 minutes, but of course, any time interval (for example, 5 minutes, 10 minutes, 15 minutes, etc.) may be used. Further, the supply and demand adjustment electric energy may be kW which is electric power instead of kWh which is electric energy.
Regarding the time zone for supply and demand adjustment, the schedule may be preset, for example, charging from 23:00 to 06:59 the next day and discharging from 07: 00-22: 59. ..

The supply and demand adjusted electric energy means how much the electric power company needs to prepare the supply amount (= power generation amount). That is, it means how much it can be adjusted compared to the normal supply amount.
The "supply and demand adjustment electric energy" specifically means a difference (adjustment amount) based on the normal time when there is no supply and demand adjustment request.
In the following, the description assumes the case where the storage battery is not charged or discharged during normal times when there is no supply and demand adjustment request. Therefore, in the normal time when there is no supply and demand adjustment request, the charge / discharge power from the storage battery is zero, so that the supply / demand adjustment amount and the charge / discharge power amount from the storage battery match.
However, when the storage battery is charged / discharged from the normal time, it is necessary to estimate how much the charge / discharge power can be adjusted in consideration of the charge / discharge power amount and control the charge / discharge of the storage battery.

According to the embodiment of the present invention, the aggregator device 1 and the electric power company system 2 will be described as separate systems, but of course, the electric power company system 2 having a function of determining the supply and demand adjustment amount includes the aggregator device 1. It may be integrally configured as described above.

<Aggregator device 1>
The aggregator device 1 receives the supply and demand adjustment request from the electric power company system 2 and knows the supply and demand adjustment electric energy.
The aggregator device 1 groups a plurality of storage batteries and determines the charge / discharge power amount equally divided into each storage battery according to the supply and demand adjustment power amount. Then, the charge / discharge power amount is notified to each storage battery 3.
As a result, even if the number of storage batteries increases, the increase in the calculation amount can be suppressed, and the charge / discharge power amount of each storage battery can be calculated according to the supply / demand adjustment power amount.

FIG. 3 is a functional configuration diagram of the aggregator device according to the present invention.

According to FIG. 3, the aggregator device 1 has a storage battery database 10, a group definition unit 11, a group component unit 12, a group selection unit 13, and a storage battery control unit 14. These functional components are realized by executing a program that makes a computer mounted on an aggregator device function. Further, the processing flow of these functional components can be understood as a method of adjusting the supply and demand of the aggregator device.

[Battery database 10]
The storage battery database 10 associates power usage information with each storage battery. The power usage information is periodically received and collected from each storage battery 3.

FIG. 4 is a storage battery database showing power usage information for each storage battery.

The storage battery database 10 stores power usage information in association with each storage battery. The power usage information may include the following information in addition to the "chargeable power amount" as equipment data.
The equipment data may further include the rated capacity, PV power generation rating, consumer power plan, and the like.
The actual data may further include the remaining amount, the abnormality occurrence rate, the number of charge / discharge requests, the number of times of power purchase / sale per hour, the dischargeable amount, the chargeable amount, the PV power generation amount, and the like.
The amount of power that can be charged and discharged is the upper limit of the amount that can be charged and discharged from the storage battery.

[Group definition unit 11]
The group definition unit 11 sets the group scale, and defines each group by repeating the formation of m groups including n members in k steps while incrementing n.

FIG. 5 is an explanatory diagram showing the processing of the group definition unit in the present invention.

The group definition unit 11 defines the parameters as follows.
Number of group members: n, nmin ≤ n ≤ nmax
nmin ≧ 1, nmax> 1
Number of groups with the same number of members n: m
Stage of group with the same number of members n: k (ascending order from the group with the smallest number of members)
Member increment rate between group stages: U (1 <U≤2)
Number of members in the group with k = 1: scale (1) = nmin
Number of members in the kth group: scale (k) = floor { U × scale (k-1)}
floor {}: Rounded-up integer Number of members in the Kth group: scale (K) ≤ nmax

Then, the group definition unit 11 repeats k steps while incrementing n until the total number of members of all groups reaches the total number of storage batteries or more. Specifically, it is configured in stages as follows.
scale (k) Group ID (number of members)
k = 1 A1 (1), A2 (1), A3 (1)
A maximum of 3 groups consisting of one storage battery k = 2 B1 (2), B2 (2), B3 (2)
Up to 3 groups consisting of 2 storage batteries k = 3 C1 (4), C2 (4), C3 (4)
Up to 3 groups consisting of 4 storage batteries K = k = 4 D1 (8), D2 (8), D3 (8)
Up to 3 groups consisting of 8 storage batteries By setting the upper limit number k of storage batteries in each group in stages, even if the number of storage batteries to be controlled increases, the increase in the number of groups is suppressed. be able to.

According to the present invention, the amount of calculation is suppressed by calculating the amount of charge / discharge power only in units of groups. In addition, a plurality of m groups having different numbers of members n are intentionally configured.
For example, when only a group with a large number of members is created, it is difficult to adjust the value to a value close to the supply and demand adjustment electric energy by combining these groups. For example, in the case of supply and demand adjustment electric energy of 140kWh, it is difficult to make fine adjustments such as 1kWh and 2kWh depending on the combination of groups. Therefore, we dare to create groups of various sizes, from groups with a small number of members to groups with a large number of members.

Also, if there is only one group with a certain number of members, that group may be selected many times. Therefore, a plurality of m groups having the same number of members are created. This will prevent you from selecting the same group multiple times.
For example, if the supply and demand adjustment power amount is not reached unless more than half of all storage batteries are requested, the group with the largest number of members will always be selected. Therefore, by preparing a plurality of groups having the maximum number of members, it is not possible to concentrate on one group for selection.

[Group component 12]
The group component 12 fits storage batteries having similar power usage information as members of each group under the constraints of the defined group.
Specifically, the group constituent unit 12 constitutes a group in which storage batteries having similar power usage information are clustered so as to satisfy the constraint on the number of members of each defined group.
Since a plurality of storage batteries belonging to the same group have similar power usage information, the same charge / discharge power amount can be requested. That is, the aggregator device 1 only needs to calculate the group selection and the charge / discharge power amount, and the calculation amount can be suppressed.

FIG. 6 is an explanatory diagram showing the processing of the group constituent unit in the present invention.

According to FIG. 6, a group is composed of dendrograms. First, the storage batteries are sorted in the order in which the power usage information is similar. Specifically, by expressing the power usage information as a vector for each item, it is possible to calculate the similarity between the storage batteries based on the Euclidean distance.

According to FIG. 6, specifically, the group is formed as follows.
(1) A group B1 having two members is formed, which includes a storage battery a and a storage battery b having the most similar power usage information.
Group B1 (batteries a, b)
(2) Next, a group B2 having two members is formed, which includes the storage battery d and the storage battery e having the most similar power usage information.
Group B1 (batteries a, b)
Group B2 (storage batteries d, e)
(3) Next, a group B3 having two members is formed, which includes the storage battery f and the storage battery g having the most similar power usage information.
Group B1 (batteries a, b)
Group B2 (storage batteries d, e)
Group B3 (battery f, g)
(4) Next, the storage battery c and the group B1 including the storage batteries a and b having the most similar power usage information are merged to form a group C1 having three members.
Eliminate group B1 Group B2 (storage batteries d, e)
Group B3 (battery f, g)
Group C1 (batteries a, b, c)
(5) Next, an attempt is made to merge the group C1 including the storage batteries a, b, and c and the group B2 including the storage batteries d and e having the most similar power usage information. However, since the number of members is 5 when these are merged, this merge is not executed. The groups here are the following three.
Group B2 (storage batteries d, e)
Group B3 (battery f, g)
Group C1 (batteries a, b, c)
(6) Since the group including the storage batteries a, b, c, d, and e is not formed, no processing is executed.
(7) A group B1 having two members is formed, which includes the storage battery h and the storage battery i having the most similar power usage information.
Group B1 (batteries h, i)
Group B2 (storage batteries d, e)
Group B3 (battery f, g)
Group C1 (batteries a, b, c)
(8) Next, the storage battery j and the group B1 including the storage batteries h and i having the most similar power usage information are merged to form a group C2 having 3 members.
Eliminate group B1 Group B2 (storage batteries d, e)
Group B3 (battery f, g)
Group C1 (batteries a, b, c)
Group C2 (batteries h, i, j)
(9) Next, a group C2 having four members is formed by merging the storage battery k and the group C2 including the storage batteries h, i, and j having the most similar power usage information.
Group B2 (storage batteries d, e)
Group B3 (battery f, g)
Group C1 (batteries a, b, c)
Group C2 (batteries h, i, j, k)
(10) Next, an attempt is made to merge the storage battery l and the group C2 including the storage batteries h, i, j, and k having the most similar power usage information. However, since the number of members is 5 when these are merged, this merge is not executed. A group A1 having one member including the storage battery l is formed.
Group A1 (storage battery l)
Group B2 (storage batteries d, e)
Group B3 (battery f, g)
Group C1 (batteries a, b, c)
Group C2 (batteries h, i, j, k)
(11) Since the group including the storage batteries a, b, c, d, e, f, and g is not formed, no processing is executed. Further, the storage batteries m are configured as one group.
Group A1 (storage battery l)
Group B2 (storage batteries d, e)
Group B3 (battery f, g)
Group C1 (batteries a, b, c)
Group C2 (batteries h, i, j, k)
Group A2 (battery m)

In addition, the group constituent unit 12 reconstructs the group at predetermined time intervals or when the predetermined conditions are satisfied. For example, it is preferable to reorganize the group for a certain period such as one week or one month, or at the timing when the storage battery to be controlled is added.

FIG. 7 is an explanatory diagram showing the amount of power that can be charged and discharged for each group.

According to FIG. 7A, it represents a group defined by the group definition unit 11. The size of the rectangle representing the group and the number in parentheses represent the maximum number of members in each group.
According to FIG. 7 (b), only the groups {a, b, c} {d, e} {f, g} {h, i, j, k} {l} {m} assigned by FIG. 6 It is an extracted one.
According to FIG. 7C, the amount of power that can be charged and discharged in all the storage batteries is shown for each group. The size of the rectangle representing the group represents the size of the amount of power that can be charged and discharged in each group.
According to FIG. 7D, each group is sorted according to the amount of power that can be charged and discharged.

[Group selection unit 13]
When the charge / discharge power from the storage battery in the normal state is not zero, the group selection unit 13 combines the groups so that the total charge / discharge amount of each storage battery is close to the charge / discharge power amount of the entire request. Select. The charge / discharge power amount for the entire request is calculated by the following formula.
Charge / discharge power for the entire request =
Supply and demand adjustment power amount from the power company system + estimated total charge / discharge amount during normal operation
Charge / discharge power (plus is discharge, minus is charge)
Supply and demand adjustment electric energy (plus is request for reduction, minus is request for increase)
Predicted total charge / discharge amount during normal operation (plus is discharge, minus is charge)
The total estimated charge / discharge amount in the normal state is the amount of power predicted to be charged / discharged if there is no supply and demand adjustment.
Then, for example, a plurality of storage batteries are sorted as shown in FIG. 7D, with the order of increasing charge / discharge power as priority. The sort priority order in the plurality of storage batteries may be a weighted average of the remaining amount.

FIG. 8 is an explanatory diagram showing the processing of the group selection unit in the present invention.

According to FIG. 8, it is trying to meet the following supply and demand adjustment demands.
Time 2018/4/1 12:00 Supply and demand adjustment request "2018/4/1 13: 00-13: 30, 140kWh, discharge"
(S1) First, group C2 is selected. At this time, since the chargeable and dischargeable electric energy of the group C2 is lower than the demand adjustment electric energy, it continues as it is.
(S2) Next, the group C2 + C1 is selected. At this time, since the chargeable and dischargeable electric energy of the group C2 + C1 is equal to or more than the demand adjustment electric energy, the group C2 selected before exceeding the demand adjustment electric energy is determined. Further, the group C2 + C1 is stored as a combination candidate.
Combination candidates: C2 + C1
(S3) Next, the group C2 + A1 is selected. At this time, since the chargeable and dischargeable electric energy of the group C2 + A1 matches the demand adjustment electric energy, the group C2 + A1 is stored as a combination candidate.
Combination candidates: C2 + C1
C2 + A1
(S4) Next, the group C2 + B2 is selected. At this time, since the chargeable and dischargeable electric energy of the group C2 + B2 is lower than the demand adjustment electric energy, it continues as it is.
(S5) Next, the group C2 + B2 + B3 is selected. At this time, since the chargeable electric energy of the group C2 + B2 + B3 is equal to or more than the demand adjustment electric energy, the group C2 + B2 selected before exceeding the demand adjustment electric energy is determined. Further, the groups C2 + B2 + B3 are stored as combination candidates.
Combination candidates: C2 + C1
C2 + A1
C2 + B2 + B3
(S6) Next, the group C2 + B2 + A2 is selected. At this time, since the chargeable electric energy of the group C2 + B2 + A2 matches the demand adjustment electric energy, the group C2 + B2 + A2 is stored as a combination candidate.
Combination candidates: C2 + C1
C2 + A1
C2 + B2 + B3
C2 + B2 + A2
Finally, among all the combination candidates, the combination of the group having the lowest chargeable / discharging power amount (closest to the supply / demand adjustment power amount) is selected. According to FIG. 8, the following two combinations are selected.
Finally selected combination: C2 + A1
C2 + B2 + A2
In this way, the group selection unit 13 can select a plurality of combinations of groups for the same demand adjustment electric energy.

Further, even if the chargeable and dischargeable electric energy is the same, a combination of different groups can be selected. Therefore, the combination of the groups is changed every time a request for the same demand adjustment electric energy is generated. May be good. It is possible to avoid a situation where requests are concentrated in a specific group.

[Battery control unit 14]
The storage battery control unit 14 instructs each storage battery of the combined group the amount of charge / discharge power. At this time, the storage battery control unit 14 divides the charge / discharge power amount of the group into each storage battery equally. Since the storage batteries having a high degree of similarity in power usage information are grouped together, the amount of charge / discharge power can be equally divided.

<Battery 3>
The storage battery 3 is configured for each group and charges / discharges according to the received charge / discharge electric energy. In addition, the power usage information of the storage battery is appropriately transmitted to the aggregator device 1.
The storage battery 3 communicates with HEMS-GW (Home Energy Management System --GateWay), HOME-GW (HOME GateWay), smart meter (power meter equipped with communication function, or HEMS-GW installed on the distribution board). It may be managed by a possible wattmeter). The aggregator device 1 transmits the charge / discharge electric energy of each storage battery to HEMS-GW or the like. Then, HEMS-GW and the like control the charge and discharge of each storage battery.
The HEMS-GW or HOME-GW may be received from the aggregator device 1 in the OpenADR data format and transmitted to the storage battery in the ECHONet-Lite data format.

FIG. 9 is a graph showing the processing time with respect to the number of storage batteries.

According to FIG. 9, it is assumed that the following parameters are set for the present invention.
Number of group members: nmin = 1
nmax = 32,768
Number of groups with the same number of members n: m = 1
Member increment rate between group stages: U = 2
Here, according to FIG. 9, when trying to control the number of storage batteries 65,535, the calculation time of the charge / discharge electric energy for each storage battery is 6,553.5 seconds (about 109 minutes), whereas the charge / discharge for each group is required. The calculation time for electric energy is 1.6 seconds. For example, when the power usage information of the storage battery can be acquired every 30 minutes, it is preferable that the calculation time of the charge / discharge power amount is also within 30 minutes. According to the above example, it takes 109 minutes to calculate for each storage battery, and it cannot be calculated within 30 minutes, and the error between the supply and demand adjustment power amount and the total charge / discharge power amount of each storage battery is large. Become.

As described in detail above, according to the aggregator device, the program, and the supply / demand adjustment method of the present invention, the number of storage batteries to be controlled is determined for determining the charge / discharge power amount for each storage battery according to the supply / demand adjustment power amount. Even if it increases, the amount of calculation in selecting the storage battery and determining the amount of charge / discharge power can be suppressed.
In particular, even if the number of storage batteries increases, the amount of calculation is suppressed and the calculation time does not become long. Therefore, it can be calculated using the new power usage information of each storage battery, and the error between the supply / demand adjustment power amount and the total charge / discharge power amount of each storage battery can be reduced.

With respect to the various embodiments of the present invention described above, various changes, modifications and omissions in the technical idea and scope of the present invention can be easily made by those skilled in the art. The above explanation is just an example and does not attempt to restrict anything. The present invention is limited only to the scope of claims and their equivalents.

1 Aggregator device 10 Storage battery database 11 Group definition unit 12 Group composition unit 13 Group selection unit 14 Storage battery control unit 2 Electric power company system 3 Storage battery

Claims (11)

In an aggregator device that controls the charge / discharge power of each of a plurality of storage batteries according to the supply and demand adjustment power amount.
A storage battery database that associates power usage information with each storage battery,
A group definition means for defining each group by repeating the formation of m groups including n members in k steps while incrementing n.
Group construction means that fits storage batteries with similar power usage information as members of each group under the constraints of the defined group.
A group selection means for selecting a combination of groups so that the sum of the chargeable and dischargeable electric energy of each storage battery is close to the charge and discharge electric energy of the entire request, which can be calculated from the demand adjustment electric energy.
An aggregator device characterized in that each storage battery of the combined group has a storage battery control means for instructing the amount of charge / discharge power. The group definition means
Number of group members: n, nmin ≤ n ≤ nmax
nmin ≧ 1, nmax> 1
Number of groups with the same number of members n: m
Stage of group with the same number of members n: k (ascending order from the group with the smallest number of members)
Member increment rate between group stages: U (1 <U≤2)
Number of members in the group with k = 1: scale (1) = nmin
Number of members in the kth group: scale (k) = floor { U × scale (k-1)}
floor {}: Rounded-up integer Number of members in the Kth group: scale (K) ≤ nmax
The aggregator device according to claim 1, wherein the aggregator device is repeated in K steps while incrementing n until the total number of members in all groups exceeds the total number of storage batteries. The group-building means according to claim 1 or 2, wherein the group-building means constitutes a group in which storage batteries having similar power usage information are clustered so as to satisfy the limitation of the number of members of each defined group. Aggregator device. The aggregator device according to claim 3, wherein the group forming means constitutes a group by a dendrogram. The aggregator device according to claim 3, wherein the group forming means reconstructs a group at predetermined time intervals or when a predetermined condition is satisfied. The group selection means
Select multiple combinations of groups for the same demand-adjusted energy
The aggregator device according to any one of claims 1 to 5, wherein the combination of groups is changed each time a request for the same demand adjustment electric energy is received. The group selection means
Priority is set for each item of power usage information,
Priority is given to each group based on each power usage information of all storage batteries included in the group.
The feature is that the combination of groups is selected so that the total charge / discharge power of each storage battery is close to the charge / discharge power of the entire request, which can be calculated from the demand adjustment power, in order from the group with the highest priority. The aggregator device according to any one of claims 1 to 6. The power utilization information according to any one of claims 1 to 7, characterized in that the power utilization information includes the rated capacity as equipment data and / or the remaining amount as actual data in addition to the amount of power that can be charged and discharged. The aggregator device described. The aggregator device according to any one of claims 1 to 8, wherein the storage battery control means divides the charge / discharge electric energy of the group into each storage battery equally. In a program that makes a computer function in a device that controls the charge / discharge power of each of a plurality of storage batteries according to the supply and demand adjustment power amount.
A storage battery database that associates power usage information with each storage battery,
A group definition means for defining each group by repeating the formation of m groups including n members in k steps while incrementing n.
Group construction means that fits storage batteries with similar power usage information as members of each group under the constraints of the defined group.
A group selection means for selecting a combination of groups so that the total charge / discharge electric energy of each storage battery is close to the charge / discharge electric energy of the entire request, which can be calculated from the demand adjustment electric energy.
A program characterized in that each storage battery in a combined group functions as a storage battery control means for instructing the amount of charge / discharge power. In the supply and demand adjustment control method of the device that controls the charge / discharge electric energy of each of a plurality of storage batteries according to the supply and demand adjustment electric energy.
The device is
Each storage battery has a storage battery database that associates power usage information.
The first step of defining each group by repeating the formation of m groups including n members in k steps while incrementing n, and
Under the constraints of the defined groups, the second step of fitting storage batteries with similar power usage information as members of each group,
The third step of selecting a combination of groups so that the total charge / discharge amount of each storage battery is close to the charge / discharge amount of the entire request, which can be calculated from the demand adjustment power amount, and
A supply and demand adjustment method, characterized in that each storage battery in the combined group is subjected to a fourth step of instructing the amount of charge / discharge power.

Images