JP2020089225A - Power management system and power management method - Google Patents

Abstract

To make it possible to appropriately determine adjustment force for power demand/supply in demand response control, depending on an environment in which a user having a power conversion device shared by a power generation device and a storage battery exists.SOLUTION: A power management system for managing power of a user group including a user having a power conversion device shared with respect to power output by a plurality of power output devices is configured to: acquire generation power corresponding to the present time of a power generation device other than a storage battery of the plurality of power output devices; on the basis of the acquired generation power, calculate chargeable power and dischargeable power corresponding to the present time of the storage battery as primary chargeable/dischargeable index values; calculate a prediction demand power amount and a prediction power generation amount as prediction parameters; and, on the basis of the primary chargeable/dischargeable index values, rated power of the power conversion device, and the prediction parameters, calculate chargeable power and dischargeable power in the future of the storage battery as secondary chargeable/dischargeable index values.SELECTED DRAWING: Figure 5

Description

The present invention relates to a power management system and a power management method.

Electric power control (demand response control) so that the amount of electric power demanded at the customer facility is increased or decreased in response to a request from the electric power company (which may be an operator of the power transmission and distribution system or a retailer of electricity) to adjust the electric power demand. Is known (see, for example, Patent Document 1).
In such demand response control, when adjusting the supply and demand of electric power, there is a movement to aggregate power sources that are distributed and installed in a region and utilize it as the power for adjusting the demand and supply of electric power. Such adjustment power is obtained by increasing or decreasing the demand or increasing or decreasing the output of the power generation equipment.

JP, 2017-224125, A

Since the adjustment amount for each customer is small, the aggregator aggregates the adjustment power of multiple customers. For this reason, the aggregator needs to manage how much adjustment power can be provided at any time, and to show the available adjustment power when a request for providing the adjustment power is made. When the electric power of the storage battery is used for such adjustment power, it is necessary to grasp what the chargeable/dischargeable amount is in the storage battery installed in the facility owned by the customer.
For example, a power conditioner (power conversion device) may be used so as to be shared by a power generation device such as a solar cell and a storage battery, particularly for household use. For the power conditioner, the maximum value allowed for the input power and the output power is defined as the rating. For this reason, when the power conditioner is shared by the power generator and the storage battery, the operation of the storage battery is limited according to the power generated by the solar battery with respect to the rated power of the power conditioner. For example, when the solar cell is generating more than the rated output power of the power conditioner, the rated output power of the power conditioner is occupied for the output power of the solar cell, and the power that the storage battery can discharge. Is limited to zero.
Therefore, when determining the adjustment power under the environment where there are consumers who share the power conditioner between the power generation device and the storage battery, for example, in order to improve the accuracy of the adjustment power, the following points should be considered. Is preferred. That is, it is preferable to consider the limitation of the operation of the storage battery according to the rating of the power conditioner and the power generated by the power generator.

The present invention addresses the limitation of the operation of the storage battery according to the rating of the power conversion device and the generated power of the power generation device in an environment where there is a customer who shares the power conversion device with the power generation device and the storage battery. Therefore, the purpose is to be able to appropriately determine the adjustment capability of the power supply and demand in the demand response control.

One aspect of the present invention for solving the above-described problem is a power management system that manages power of a customer group including a customer including a power converter that is common to the power output by a plurality of power output devices. Therefore, among the plurality of power output devices, the generated power acquisition unit that acquires the generated power corresponding to the current of the power generation device other than the storage battery, and the generated power acquired by the generated power acquisition unit corresponds to the present At least one of the chargeable power and the dischargeable power of the storage battery, a primary chargeable/dischargeable index value calculation unit that calculates the primary chargeable/dischargeable index value of the storage battery, and a demand including the storage battery as a prediction parameter A prediction parameter calculation unit that calculates a predicted demand power amount that is a predicted value of the demand power amount of a house and a predicted generated power amount that is a predicted value of the generated power amount of the power generation device included in the consumer, and the primary charge/discharge Based on the possible index value, rated power information indicating the rated power of the power conversion device, and the prediction parameter, at least one of the future storageable power and dischargeable power of the storage battery is secondary charged. The power management system includes a secondary chargeable/dischargeable index value calculation unit that calculates a dischargeable index value.

One aspect of the present invention is a power management method in a power management system that manages power of a customer group including a customer including a power converter that is common to the power output by a plurality of power output devices. The power acquisition unit, a power generation power acquisition step of acquiring power generation power corresponding to the current of the power generation device other than the storage battery among the plurality of power output devices, the primary chargeable and dischargeable index value calculation unit, by the power generation power acquisition unit. Based on the acquired generated power, at least one of the chargeable power and the dischargeable power of the storage battery corresponding to the present time is calculated as a primary chargeable/dischargeable index value for calculating the primary chargeable/dischargeable index value of the storage battery. The step and the prediction parameter calculation unit are, as the prediction parameters, a predicted demand power amount that is a predicted value of the demand power amount of a customer including the storage battery, and a predicted value of the generated power amount of the power generation device that is included in the consumer. A prediction parameter calculation step of calculating a predicted generated power amount, a secondary chargeable/dischargeable index value calculation unit, the primary chargeable/dischargeable index value, rated power information indicating a rated power of the power conversion device, and the prediction Based on the parameter, at least one of the chargeable power and the dischargeable power of the storage battery in the future, a secondary chargeable/dischargeable index value calculating step of calculating as a secondary chargeable/dischargeable index value Is the way.

One aspect of the present invention is a power management system that manages power of a customer group including a customer including a power converter that is common to the power output by a plurality of power output devices. A power generation power acquisition unit that acquires power generation power corresponding to the present of a power generation device other than a storage battery, a power generation power acquired by the power generation power acquisition unit, and rated power information indicating the rated power of the power conversion device, On the basis of the above, at least one of the chargeable power and the dischargeable power of the storage battery corresponding to the present time, a power management system including a chargeable/dischargeable index value calculation unit that calculates as a chargeable/dischargeable index value of the storage battery. Is.

One aspect of the present invention is a power management method in a power management system that manages power of a customer group including a customer including a power converter that is common to the power output by a plurality of power output devices. The electric power acquisition unit acquires the generated power corresponding to the current generated power of the power generator other than the storage battery among the plurality of power output devices, and the chargeable/dischargeable index value calculation unit acquires through the generated power acquisition step. Based on the generated power generated and the rated power information indicating the rated power of the power converter, at least one of the chargeable power and the dischargeable power of the storage battery corresponding to the present time, the charge and discharge of the storage battery And a chargeable/dischargeable index value calculating step of calculating as a possible index value.

According to the present invention, in an environment where there is a customer who shares a power conversion device with a power generation device and a storage battery, the operation of the storage battery is restricted according to the rating of the power conversion device and the generated power of the power generation device. Correspondingly, there is an effect that it becomes possible to appropriately determine the adjustment power of the power supply and demand in the demand response control.

It is a figure which shows the whole structural example of the power management system in 1st Embodiment. It is a figure which shows an example of the electric equipment with which the consumer facility in 1st Embodiment is equipped. It is a figure which shows the structural example of the facility power management apparatus and local power management apparatus of 1st Embodiment. It is a flow chart which shows an example of a processing procedure which a facility power management device and a local power management device of a 1st embodiment perform. It is a flow chart which shows the example of a processing procedure which a facility power management device and a local power management device of a 2nd embodiment perform.

<First Embodiment>
[Example of power management system configuration]
FIG. 1 shows an example of the overall configuration of a power management system according to 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 area range. Such a power management system is called, for example, a HEMS (Home Energy Management System) that manages in units of customer facilities, a TEMS (Town Energy Management System) that integrates and manages the HEMS, and a CEMS (Community Energy Management System). Correspond to things.

The power management system of the present embodiment performs power management on electric equipment provided for each of a plurality of customer facilities 10 in a certain range of area 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. In addition, the power management area 1 may correspond to, for example, one or a plurality of housing units, and each of the customer facilities 10 may be each house in the housing unit.

In the plurality of customer facilities 10 in the power management area 1 shown in the figure, the customer facilities 10 including solar cells, which are power generation devices corresponding to renewable energy, are included. In addition, the plurality of customer facilities 10 in the power management area 1 include the customer facility 10 including a storage battery as one of the electric facilities.
Among such customer facilities 10, there may be a customer facility 10 including both a solar cell and a storage battery, or there may be a customer facility 10 including either a solar cell or a storage battery. Good.

In addition to the solar cell, or instead of the solar cell, the customer facility 10 may be provided with a power generation device that generates power corresponding to other renewable energy such as wind power and geothermal heat. In addition, in the customer facility 10, in addition to a power generation device that generates power corresponding to renewable energy, other power generation devices such as a fuel cell that generates electric power using gas etc. are provided. May be.
However, in the following, for convenience of simplification of description, the case where the power generation device provided in the customer facility 10 is a solar cell will be described as an example.

A commercial power supply 2 is branched and supplied to each customer facility 10 in the power management area 1 by being connected to a common distribution line 3. Each consumer facility 10 can supply the load with the electric power supplied from the distribution line 3. As a result, various electric facilities (equipment) as loads are operated.
Moreover, the consumer facility 10 including the solar cell can output the generated power of the solar cell to the distribution line 3 (reverse flow).
Further, in the customer facility 10 including the storage battery, it is possible to receive power supply from the distribution line 3 and store (charge) the storage battery. Further, in the customer facility 10 including the storage battery and the solar battery, the storage battery can be charged with the power generated by the solar battery.

Further, the position of the customer facility may not be limited to the same area as other customer facilities similarly managed as long as the position is managed by the power management system. For example, customer facilities may be dispersed within the same power pipe. In addition, the power management system is registered as a customer facility under its own control, and if it is possible to send and receive information managed by using the network 300, the power management system can operate in different areas (for example, Hokkaido, Honshu, Kyushu, Shikoku, etc.). It may be an aggregate of a plurality of consumer facilities registered in each area). In this case, the common distribution line 3 is an aggregate of power lines in the area connected to each of the customer facilities 10.

In addition, in the power management system of the present embodiment, the regional power management device 200 is provided.
The local power management apparatus 200 executes power control for the electric equipment in each customer facility 10 belonging to the power management area 1. For this reason, the regional power management apparatus 200 in the figure is connected via the network 300 so as to be able to mutually communicate with each of the customer facilities 10. Thereby, the regional power management apparatus 200 can control the electric equipment in each customer facility 10.

In addition, in the power management system of the present embodiment, the regional power management apparatus 200 is communicably connected to the host apparatus 400 (an example of an external apparatus).
In the power management area 1 of the present embodiment, control (demand response control) corresponding to supply and demand power adjustment (demand response) is performed under negawatt trading. The host device 400 is operated by, for example, an electric power company (retail electric power company, power transmission and distribution company, etc.), and the regional power management device 200 is operated by an aggregator.

In the power management area 1, the regional power management apparatus 200 executes control for adjusting the supply and demand power in the power management area 1 in response to a demand response request from the host device 400. The demand/supply power here includes demand power and supply power. The demand power is the purchased power (forward flow power) supplied from the distribution line 3 to the power management area 1. The supplied power is the sold power (reverse flow power) supplied from the power management area 1 to the distribution line 3.
For example, since the demand power is reduced by the demand response control in the power management area 1, for example, the power company procures the power amount according to the adjusted power demand as the power that can be supplied to the areas other than the power management area 1. It was done. In the negawatt transaction, the consideration is paid to the customers in the power management area 1 as consideration for the procurement of the electric power. Under the negawatt transaction of the present embodiment, a case where a set of customer facilities 10 included in the power management area 1 is treated as one customer will be described as an example.

[Examples of electrical equipment in customer facilities]
Next, with reference to FIG. 2, an example of the electric equipment provided in one consumer facility 10 will be described.
The consumer facility 10 shown in the figure is a solar cell 11, a storage battery 12, a DC/DC converter 13, a power conditioner 14 (an example of a power conversion device), a distribution board 15, a load 16, and facility power as electrical equipment. The management device 100 is provided.

The solar cell 11 is one of power generation devices that use renewable energy, and converts light energy into electric power by the photovoltaic effect. The solar cell 11 converts sunlight into electric power by being installed in a place that can efficiently receive sunlight, such as the roof of the customer facility 10.

The storage battery 12 stores the electric power input for charging, and discharges and outputs the stored electric power. As the storage battery 12, for example, a lithium ion battery or the like can be adopted.
The DC/DC converter 13 performs DC-DC conversion on the electric power output from the storage battery 12, and supplies the electric power to the power conditioner 14. Further, the DC/DC converter 13 performs DC-DC conversion on the electric power input from the power conditioner 14 and supplies it to the storage battery 12 as electric power for charging.

The power conditioner 14 performs power control corresponding to the solar cell 11 (an example of a power output device) and the storage battery 12 (an example of a power output device). That is, the power conditioner 14 is commonly used by the solar cell 11 and the storage battery 12.
The power conditioner 14 can convert direct current power generated by the solar cell 11 into alternating current and output the alternating current to the distribution board 15. Alternatively, the power conditioner 14 can output the output of the storage battery 12 output from the DC/DC converter 13 to the distribution board 15.
The power conditioner 14 can output the electric power input from the solar cell 11 or the distribution board 15 to the DC/DC converter 13 to charge the storage battery 12.

The distribution board 15 is connected to the power conditioner 14, the distribution line 3, and the load 16. Thereby, the distribution board 15 can form a power path in the consumer facility 10 so as to supply the commercial power to the load 16.
Further, the distribution board 15 can form a power path so that the power generated by the solar cell 11 (generated power) is supplied from the power conditioner 14 to the load 16.
Further, the distribution board 15 can form a power path so that the storage battery 12 is charged with the power supplied from one or both of the commercial power supply 2 and the solar cell 11.
Further, the distribution board 15 can form a power path so that the power output from the storage battery 12 by discharging is supplied to the load 16.
Further, the distribution board 15 can form a power path so that the power generated by the solar cell 11 or the power output by the discharge of the storage battery 12 flows backward through the distribution line 3, for example.

The load 16 is a collective representation of devices and equipment that consume electric power because they operate in the customer facility 10.

The facility power management apparatus 100 manages electrical facilities (solar battery 11, storage battery 12, DC/DC converter 13, power conditioner 14, distribution board 15, load 16, and all or part of them) in the customer facility 10. To do.

The regional power management apparatus 200 previously shown in FIG. 1 executes power control for electrical equipment in the entire consumer facility 10 belonging to the power management region 1. For this reason, the regional power management apparatus 200 is connected to each of the facility power management apparatuses 100 in the customer facility 10 so as to be able to communicate with each other via the network 300. Thereby, the facility power management apparatus 100 can control the electric equipment under its own control according to the control of the regional power management apparatus 200.

[Specific example of determining controllable power amount]
A specific example of the procedure up to the determination of the controllable power amount (an example of the controllable index value) in the power management system of the present embodiment having the above configuration will be described.
First, the storage battery 12 of the customer facility 10 transmits the storage battery information about itself to the facility power management apparatus 100 of the same customer facility 10 at regular time intervals (here, one minute is taken as an example). For example, the storage battery information includes the maximum storage capacity corresponding to the present time (corresponding to the current time), the storage capacity corresponding to the current time, and the power outage corresponding power amount.
The maximum storage capacity corresponding to the current time is the storage capacity when the storage battery 12 is fully charged at the present time. The storage battery 12 is, for example, to periodically discharge SOH (State Of Health: capacity retention rate) by forcibly discharging from the fully charged state to a constant discharge power until the storage capacity becomes zero in order to measure SOH (State Of Health). The maximum storage capacity is measured based on the discharging power and the time required for discharging. The maximum storage capacity corresponding to the current time may be a measured value of the latest maximum storage capacity. It can be considered that the maximum storage capacity corresponding to the current time reflects the capacity maintenance rate that is decreasing according to the current deterioration of the storage battery 12. That is, the maximum storage capacity corresponding to the current time may be considered to reflect the current deterioration state of the storage battery 12.
The storage capacity corresponding to the current time is the amount of power currently stored in the storage battery 12.
The maximum storage capacity and the storage capacity corresponding to the current time can be measured by, for example, a BMU (Battery Management Unit) included in the storage battery 12.

With respect to the storage battery 12 of a certain customer facility 10, the maximum storage capacity corresponding to the current time was 10 kWh at the time of new article shown as the specification, but was 8 kWh with the progress of deterioration.
In this embodiment, the storage battery 12 is set with a power outage-capable power amount. The power outage-capable power is the amount of power that should be secured during normal operation without being discharged so that the minimum amount of power can be supplied even when a power failure occurs. Such a power outage corresponding to a power outage is discharged as needed only when a power outage occurs. The amount of power corresponding to this power failure was 2 kWh.
In addition, the current storage capacity of the storage battery 12 is 7 kWh including the area at the time of power failure.

Based on the received storage battery information, the facility power management apparatus 100 calculates the dischargeable power amount (primary dischargeable power amount) and the chargeable power amount (primary chargeable power amount) corresponding to the current time as follows. Can be calculated. That is, the primary dischargeable power amount can be calculated as 5 kWh (=7 kWh-2 kWh), and the primary chargeable power amount can be calculated as 1 kWh (=8 kWh-7 kWh).
The calculation of the primary dischargeable power amount and the primary chargeable power amount may be performed by the storage battery 12 or the power conditioner 14 or the like in the customer facility 10, and may be notified to the facility power management apparatus 100. Hereinafter, when the primary dischargeable power amount and the primary chargeable power amount are not particularly distinguished, the primary chargeable/dischargeable power amount (an example of the primary chargeable/dischargeable index value) is described.
The facility power management apparatus 100 transmits current time corresponding power related information including information indicating the primary dischargeable power quantity and the primary chargeable power quantity to the regional power management apparatus 200. The current time corresponding electric power related information includes information indicating the demand electric power corresponding to the present time corresponding to the same time and the electric power generated by the solar cell 11. Furthermore, the current-time-corresponding power-related information may also include storage battery information received from the storage battery 12.

The local power management apparatus 200 receives the current-time-corresponding power-related information from the facility power management apparatus 100 at a corresponding timing every minute.
Then, the regional power management apparatus 200, based on the received current-time-corresponding power-related information, at every constant time (for example, 20 minutes or 1 hour) longer than the reception cycle of the current-time-corresponding power-related information. Calculate (predict) a future dischargeable power amount (secondary dischargeable power amount) and a chargeable power amount (secondary chargeable power amount) of the storage battery 12 after a predetermined time (for example, one hour) after the time. ..
Therefore, the regional power management apparatus 200 uses the information about the demand power and the generated power included in the received current time corresponding power-related information, and uses the information about the demand power and the generated power in the past for a fixed period (here, for example, 20 minutes). The average value of the demand power (average demand power) in the customer facility 10 and the average value of the generated power (average generated power) are calculated. Here, the average power demand calculated by the regional power management apparatus 200 was 1.5 kW, and the average generated power was 2 kW.
Then, the regional power management apparatus 200 assumes that the average demand power and the average generated power calculated as described above each continue for one hour from the current time, and regarding the predicted power demand from one hour after the current time, It is calculated to be 1.5 kWh, and the predicted power generation amount is 2 kWh.

The regional power management apparatus 200, based on the predicted demand power amount and the predicted generated power amount (an example of a prediction parameter) calculated as described above, the rechargeable power amount (secondary power) of the storage battery 12 one hour after the current time. Chargeable electric energy) and dischargeable electric energy (secondary dischargeable electric energy) are calculated (predicted). Note that, hereinafter, the secondary chargeable power amount and the secondary dischargeable power amount will be referred to as the secondary chargeable/dischargeable power amount (an example of the secondary chargeable/dischargeable index value).
In this case, in the customer facility 10, the predicted generated power amount of 2 kWh covers the predicted demand power amount of 1.5 kWh, and the predicted generated power amount is surplus by 0.5 kWh. The storage battery 12 is charged with a surplus of predicted generated power of 0.5 kWh. Therefore, the secondary dischargeable electric energy after 1 hour from the current time is calculated as 5.5 kWh by adding 0.5 kWh to the primary dischargeable electric energy of 5 kWh, and the secondary chargeable electric energy is It is calculated as 0.5 kWh by subtracting 0.5 kWh from the primary chargeable electric energy of 1 kWh.

Next, the regional power management apparatus 200 determines the controllable power amount as follows, for example, based on the secondary dischargeable power amount and the secondary chargeable power amount calculated as described above.
As an example, a case where the number of storage batteries 12 provided in the power management area 1 is 1000 is given as an example. Of these storage batteries 12, 100 are in a state in which control by the regional power management apparatus 200 is impossible due to a communication failure or the like, and therefore there are 900 effective storage batteries 12. In this case, the regional power management apparatus 200 calculates the total sum of the effective secondary dischargeable electric energy and the effective secondary chargeable electric energy for each 900 units. The total sum of the secondary dischargeable electric energy and the total secondary chargeable electric energy were 6000 kWh and 300 kWh, respectively.
Here, an example is given in which the baseline of the transmitted power is 0 kW and the baseline of the received power from the grid is 500 kW, which is set for the power management area 1. In this case, regarding the controllable electric energy, when the discharge side is represented by a positive value (+) and the charge side is represented by a negative value (-), the regional power management apparatus 200 has a range (adjustment power) from 6000 kWh to -300 kWh. ) Can be determined.
However, the controllable power amount may be corrected using the correction parameter in consideration of, for example, the margin with respect to the controllable power amount and the likelihood of the controllable power amount. The correction parameter may be, for example, a coefficient by which the correction target value is multiplied, or an addition/subtraction value that is added to or subtracted from the correction target value. Further, such a correction parameter may be determined based on, for example, the difference between the command value (control command value) of the demand response in the past and the control actual value in the demand response control in the power management area 1. ..
For example, when a coefficient of 0.9 is set as the correction parameter, the maximum value and the minimum value of the controllable electric energy are corrected from 6000 kWh and -300 kWh to 5600 kWh and 270 kWh, respectively.
In this case, the local power management apparatus 200 transmits the controllable power amount indicating the range of 5600 kWh to 270 kWh to the upper level apparatus 400.

The controllable power amount determined as described above is controlled (adjusted) as the power management area 1 (managed area) when demand response control is to be performed in response to a demand response request from the power company. The amount of electric power that can be used. In the relationship between the aggregator and the electric power company, such controllable electric energy may be equivalent to the planned value notified by the aggregator to the electric power company in the demand response contract. In this way, the local power management apparatus 200 transmits the controllable power amount to the higher-level device 400, so that the aggregator notifies the power company of the controllable power amount (planned value).

The host device 400 determines a control command value for the power management area 1 based on the received controllable power amount, and transmits the command value to the facility power management device 100. The facility power management apparatus 100 controls the control information instructing the charging/discharging operation of the controllable storage battery 12 among the storage batteries 12 installed in the customer facility 10 so as to satisfy the received command value. It transmits to the facility power management apparatus 100 of the consumer facility 10 that includes the possible storage battery 12.

[Configuration example of facility power management device and regional power management device]
FIG. 3 shows a configuration example of the facility power management apparatus 100 and the regional power management apparatus 200 of this embodiment.
First, a configuration example of the facility power management apparatus 100 will be described. The facility power management apparatus 100 shown in the figure includes a first communication unit 101, a second communication unit 102, a control unit 103, and a storage unit 104.

The first communication unit 101 communicates with the equipment in the customer facility 10. The communication protocol supported by the first communication unit 101 is not particularly limited, but may be “ECHONET Lite (registered trademark)”, for example.
The second communication unit 102 communicates with the local power management apparatus 200 via the network 300.

The control unit 103 executes various controls in the facility power management apparatus 100. The function as the control unit 103 is realized by a CPU (Central Processing Unit) included in the facility power management apparatus 100 executing a program.
The control unit 103 includes a storage battery information acquisition unit 131 and a primary chargeable/dischargeable index value calculation unit 132.
The storage battery information acquisition unit 131 acquires the storage battery information by receiving the storage battery information transmitted from the storage battery 12 at regular intervals (for example, 1 minute).
The primary chargeable/dischargeable index value calculation unit 132 calculates at least one of the primary chargeable power amount and the primary dischargeable power amount as the primary chargeable/dischargeable index value of the storage battery 12 based on the storage battery information. In the present embodiment, the primary chargeable/dischargeable index value calculation unit 132 calculates both the primary chargeable power amount and the primary dischargeable power amount as the primary chargeable/dischargeable index value.
The primary chargeable/dischargeable index value calculation unit 132 causes the second communication unit 102 to transmit the current time corresponding power-related information including the calculated primary chargeable/dischargeable index value to the regional power management apparatus 200.

The storage unit 104 stores various types of information that the facility power management apparatus 100 supports. For example, the storage unit 104 may store a program or the like that implements each functional unit included in the control unit 103. In addition, the storage unit 104 may store a history of storage battery information, a transmission history of storage battery information, and the like.

Next, a configuration example of the local power management apparatus 200 will be described. The local power management apparatus 200 in the figure includes a communication unit 201, a control unit 202, and a storage unit 203.

The communication unit 201 communicates with the facility power management apparatus 100 of the customer facility 10 in the power management area 1 via the network 300. The communication unit 201 also communicates with the higher-level device 400. The communication between the communication unit 201 and the higher-level device 400 may be via a network like the communication with the facility power management apparatus 100, or may be a predetermined dedicated communication network.

The control unit 202 executes various controls in the regional power management apparatus 200. The function as the control unit 202 is realized by the CPU included in the local power management apparatus 200 executing a program.

The control unit 202 includes a prediction parameter calculation unit 221, a secondary chargeable/dischargeable index value calculation unit 222, a controllable index value determination unit 223, a controllable index value transmission unit 224, and a correction unit 225.

The prediction parameter calculation unit 221 calculates the predicted demand power amount and the predicted generated power amount as the prediction parameters. As described above, the prediction parameter calculation unit 221 uses the information about the demand power and the generated power included in the received current time corresponding power related information regarding the predicted demand power amount and the predicted generated power amount as the prediction parameters. Can be calculated.

The secondary chargeable/dischargeable index value calculation unit 222 calculates the secondary dischargeable power amount and the secondary chargeable power amount as the secondary chargeable/dischargeable index value based on the prediction parameter calculated as described above. (Predict. The secondary chargeable/dischargeable index value calculation unit 222 may calculate, as the secondary chargeable/dischargeable index value, either one of the secondary dischargeable power amount and the chargeable power amount or the secondary chargeable power amount. In the present embodiment, both are calculated.
The controllable index value determination unit 223 determines the controllable power amount based on the secondary dischargeable power amount and the secondary chargeable power amount as the secondary chargeable/dischargeable index value calculated as described above.
The controllable index value transmission unit 224 transmits the controllable power amount determined by the controllable index value determination unit 223 to the host device 400.

The controllable index value determination unit 223 calculates the sum of all or some of the chargeable/dischargeable index values for each storage battery 12 calculated by the secondary chargeable/dischargeable index value calculation unit 222. The controllable index value determination unit 223 determines the controllable power amount (an example of the controllable index value) based on the calculated sum of the chargeable/dischargeable index values.

The controllable index value transmission unit 224 transmits the controllable power amount determined by the controllable index value determination unit 223 to the host device 400. That is, the controllable index value transmission unit 224 controls the communication unit 201 so that the controllable power amount is transmitted to the higher-level device 400.

The correction unit 225 corrects at least one of the primary chargeable/dischargeable index value, the secondary chargeable/dischargeable index value, and the controllable electric energy as a correction target using a predetermined correction parameter.

The storage unit 203 stores various types of information supported by the regional power management apparatus 200. For example, the storage unit 203 may store a program or the like that implements each functional unit included in the control unit 202. Further, the storage unit 203 may store a correction parameter used by the correction unit 225. Further, the storage unit 203 may store a history of controllable power amounts determined by the controllable index value determination unit 223, a history of transmission of controllable power amounts by the controllable index value transmission unit 224, and the like.

[Processing procedure example]
An example of a processing procedure executed by the facility power management apparatus 100 and the regional power management apparatus 200 according to the present embodiment will be described with reference to the flowchart of FIG.
First, an example of the processing procedure of the facility power management apparatus 100 will be described.
Step S101: The storage battery 12 of the customer facility 10 generates storage battery information corresponding to itself at predetermined time intervals (for example, 1 minute) and transmits the storage battery information to the facility power management apparatus 100 in the same customer facility 10. In the facility power management apparatus 100, the storage battery information acquisition unit 131 acquires the transmitted storage battery information.

Step S102: The primary chargeable/dischargeable index value calculation unit 132 calculates the primary chargeable/dischargeable electric energy (primary chargeable electric energy, primary dischargeable electric energy).
Step S103: The primary chargeable/dischargeable index value calculation unit 132 transmits current time corresponding power-related information including information indicating the primary chargeable/dischargeable power amount calculated in step S102 to the regional power management apparatus 200.

Next, an example of the processing procedure of the local power management apparatus 200 will be described.
Step S201: In the local power management apparatus 200, the control unit 202 receives the current time corresponding power related information transmitted from the facility power management apparatus 100 at a timing corresponding to every minute in Step S103. The control unit 202 causes the storage unit 203 to store the received current time corresponding power related information.
Step S202: The control unit 202 determines whether or not the determination timing of the controllable power amount has been reached. If the timing for determining the controllable power amount has not been reached, the process returns to step S201.

Step S203: When it is determined in step S202 that the timing for determining the controllable power amount has been reached, the prediction parameter calculation unit 221 calculates prediction parameters (predicted demand power amount and predicted generated power amount). The prediction parameter calculation unit 221 receives the power demand included in the current time corresponding power related information received from step S201 and stored in the storage unit 203, for example, the current time corresponding power past a predetermined time from the current time. It may be calculated using information on the generated power.

Step S204: The secondary chargeable/dischargeable index value calculation unit 222 calculates the secondary chargeable/dischargeable index value (secondary dischargeable power amount, secondary chargeable power amount) based on the prediction parameter calculated in step S203. Is calculated (predicted).

Step S205: The controllable index value determination unit 223 calculates the sum of the secondary chargeable/dischargeable index values calculated in step S204. That is, the controllable index value determination unit 223 calculates the total sum of the secondary dischargeable electric energy and the total secondary chargeable electric energy.

Step S206: The controllable index value determination unit 223 determines the controllable power amount based on the controllable power amount calculated in step S205. In determining the controllable power amount, the controllable index value determination unit 223 may consider the baseline determined corresponding to the power management area 1 as described above, for example.
Step S207: The correction unit 225 uses the correction parameter to correct the controllable power amount determined in step S206.
Step S208: The controllable index value transmission unit 224 causes the communication unit 201 to transmit the controllable power amount corrected in Step S206 to the host device 400.

<Second Embodiment>
[Overview]
Next, the second embodiment will be described. In the consumer facility 10 illustrated in FIG. 2, the power conditioner 14 is shared by the solar cell 11 and the storage battery 12. In this way, the solar cell 11 and the storage battery 12 share the power conditioner 14, so that the solar cell 11 and the storage battery 12 are provided with a power conditioner individually. Equipment installation costs can be reduced.

However, under the configuration in which the solar cell 11 and the storage battery 12 share the power conditioner 14, there is a case where the solar cell 11 is in a state of generating power equal to or higher than the rated upper limit value of the power conditioner 14. is there. In such a case, all of the electric power input/output by the power conditioner 14 is the electric power output from the solar cell 11, so that the electric power cannot be discharged from the storage battery 12.
In determining the controllable power (an example of the controllable index value) that reflects the chargeable/dischargeable amount of the storage battery 12 in the power management area 1, the above-described rating of the power conditioner 14 and the generated power of the solar cell 11 are used. By considering the limitation of the discharge power of the storage battery 12 according to the above, it becomes possible to improve the accuracy of the controllable power.
Therefore, in the present embodiment, the controllable power is determined such that the limitation of the discharge power of the storage battery 12 according to the rating of the power conditioner 14 and the generated power of the solar cell 11 is reflected.

[Configuration example of facility power management device and regional power management device]
The configurations of the facility power management apparatus 100 and the regional power management apparatus 200 corresponding to this embodiment may be the same as those in FIG.
However, in the facility power management apparatus 100 of the present embodiment, the primary chargeable/dischargeable index value calculation unit 132 uses the chargeable power (primary chargeable power) corresponding to the current time and the dischargeable power as the primary chargeable/dischargeable index. (Primary dischargeable power) is calculated.
Further, in the regional power management device 200 of the present embodiment, the secondary chargeable/dischargeable index value calculation unit 222 uses, as the secondary chargeable/dischargeable index value, chargeable power after a predetermined time from the current time (secondary chargeable power). ) And dischargeable power (secondary dischargeable power) are calculated.
Further, the controllable index value determination unit 223 calculates the controllable power after a predetermined time from the current time as the controllable index value, and the controllable index value transmission unit 224 is determined by the controllable index value determination unit 223. The controllable power is transmitted to the higher-level device 400.

[Specific example of determining controllable power amount]
A specific example of the procedure up to the determination of controllable power in the power management system of the present embodiment having the above configuration will be described.
First, similarly to the first embodiment, the storage battery 12 of the customer facility 10 stores the storage battery information regarding the self at the same customer facility 10 at regular time intervals (here, one minute is taken as an example). It transmits to the power management apparatus 100. The storage battery information of the present embodiment may also include the storage capacity corresponding to the current time, the maximum storage capacity, and the power outage-capable power amount.
In the description here, similarly to the first embodiment, a case where the power outage corresponding power amount is 2 kWh, the maximum storage capacity is 8 kWh, and the storage capacity of the storage battery 12 corresponding to the current time is 7 kWh including the region at the time of power failure Take for example.

The facility power management apparatus 100 can calculate the primary dischargeable power and the primary chargeable power as the primary chargeable/dischargeable index value corresponding to the current time, based on the received storage battery information. Also in the present embodiment, the storage battery 12 or the power conditioner 14 or the like in the customer facility 10 performs the calculation of the primary dischargeable power and the primary dischargeable power, and notifies the facility power management apparatus 100 of the calculation. Good.

The facility power management apparatus 100 transmits current time corresponding power related information including information indicating the primary dischargeable power and the primary chargeable power to the regional power management apparatus 200. The current time corresponding electric power related information includes information indicating the demand electric power corresponding to the present time corresponding to the same time and the electric power generated by the solar cell 11.

The local power management apparatus 200 receives the current-time-corresponding power-related information from the facility power management apparatus 100 at a corresponding timing every minute.
The local power management apparatus 200 sets the current time based on the received current time corresponding power related information at fixed time intervals (for example, 20 minutes or 1 hour) longer than the reception cycle of the current time corresponding power related information. Each of the secondary dischargeable power and the secondary chargeable power is calculated (predicted) as the secondary chargeable/dischargeable index value of the storage battery 12 after a predetermined time (for example, one hour).
Therefore, the regional power management apparatus 200 uses the information about the demand power and the generated power included in the received current time corresponding power-related information, and uses the information about the demand power and the generated power in the past for a fixed period (here, for example, 20 minutes). The average value of the demand power (average demand power) in the customer facility 10 and the average value of the generated power (average generated power) are calculated. Here, the average power demand calculated by the regional power management apparatus 200 was 1.5 kW, and the average generated power was 2 kW.
Then, the regional power management apparatus 200 assumes that the average demand power and the average generated power calculated as described above each continue for one hour from the current time, and the predicted demand power after one hour from the current time is 1. It is calculated that it is 5 kW and the predicted generated power is 2 kW.

The regional power management apparatus 200, based on the predicted demand power and the predicted generated power (an example of prediction parameters) calculated as described above, can charge the storage battery 12 one hour after the current time (secondary chargeable power). ) And dischargeable power (secondary dischargeable power) are calculated (predicted). Note that, hereinafter, the secondary chargeable power and the secondary dischargeable power will be referred to as the secondary chargeable/dischargeable power (an example of the secondary chargeable/dischargeable index value).
In this case, in the customer facility 10, the predicted generated power of 2 kW covers the predicted demand power of 1.5 kW, and 0.5 kW is surplus as the predicted generated power. The surplus of 0.5 kW of predicted generated power is charged in the storage battery 12. Therefore, the secondary dischargeable power after 1 hour from the current time is calculated as 5.5 kW by adding 0.5 kW to the primary dischargeable power of 5 kW, and the secondary chargeable power is the primary chargeable It is calculated as 0.5 kW by subtracting 0.5 kW from the electric power of 1 kW.

Regarding the secondary chargeable/dischargeable power (secondary dischargeable power, secondary chargeable power) calculated as described above, the rated power of the power conditioner 14 is not yet taken into consideration. Therefore, the regional power management apparatus 200 calculates the secondary chargeable/dischargeable power in consideration of the rated power of the power conditioner 14 as follows.

Here, regarding the rated power of the power conditioner 14 provided in the customer facility 10, the case where the maximum input power is 2 kW and the maximum output power is 2 kW is taken as an example. The regional power management apparatus 200 may acquire the rated power of the power conditioner 14 for each customer facility 10 as follows. That is, the facility power management apparatus 100 includes the rated power stored in the power conditioner 14 in the current-time-corresponding power-related information and transmits it to the local power management apparatus 200. The local power management apparatus 200 acquires information on the rated power of the power conditioner 14 included in the transmitted current time-related power-related information. Alternatively, the facility power management apparatus 100 collects information on the rated power of the power conditioner 14 for each customer facility 10 in advance and stores it in the storage unit 203, and stores it when calculating the secondary chargeable/dischargeable power. The rated power may be obtained from the unit 203.

In this case, as the secondary chargeable/dischargeable power without considering the rated power of the power conditioner 14, the secondary dischargeable power at the current time point and one hour later is 5.5 kW, which is the same as the maximum output power of the power conditioner 14 of 2 kW. The chargeable power is calculated as 1.5 kW, which is obtained by subtracting 0.5 kW that has already charged the storage battery 12 from 2 kW, which is the maximum charge power of the power conditioner 14.

Further, the secondary chargeable/dischargeable power may be calculated after reflecting the rated power of the power conditioner 14 on the primary chargeable/dischargeable power. Also here, as the rated power of the power conditioner 14 provided in the customer facility 10, the case where the maximum input power is 2 kW and the maximum output power is 2 kW is taken as an example.
For example, the dischargeable power amount corresponding to the current time and the rechargeable power amount calculated by the facility power management apparatus 100 were 5 kWh and 1 kWh, respectively (also in the present embodiment, the current time corresponding power-related information is: The dischargeable power amount and the chargeable power amount corresponding to the current time, which are calculated by the facility power management apparatus 100, may be included).
In this case, when the generated power corresponding to the current time is 5 kW, the maximum discharge power of the power conditioner 14 has already been reached, so the primary dischargeable power is 0 kW. The maximum chargeable power is 2 kW.
Then, if the predicted demand power in the past 20 minutes is 0.5 kW and the predicted generated power is 4 kW, the dischargeable power amount 1 hour after the current time is 5+(4-0.5)=8.5 kWh. Although calculated, since the maximum storage capacity of the storage battery 12 is 8 kWh, it is the same as the maximum storage capacity of 8 kWh. Along with this, the storage battery 12 is fully charged one hour after the current time, so the chargeable electric energy after one hour is 0 kWh. In addition, the dischargeable power after 1 hour from the current time is 1 kW (=5 kW-4 kW), and the chargeable power is 2 kW, which is the same as the maximum input power in the rating of the power conditioner 14. The facility power management apparatus 100 may use the chargeable power and the dischargeable power one hour after the present time thus obtained as the calculation results of the secondary chargeable power and the secondary dischargeable power, respectively.

Next, the regional power management apparatus 200 determines controllable power as follows, for example, based on the secondary dischargeable power and the secondary chargeable power calculated as described above.
As an example, a case where the number of storage batteries 12 provided in the power management area 1 is 1000 is given as an example. Of these storage batteries 12, 100 are in a state in which control by the regional power management apparatus 200 is impossible due to a communication failure or the like, and therefore there are 900 effective storage batteries 12. In this case, the regional power management apparatus 200 calculates the total sum of the secondary dischargeable power and the secondary chargeable power for each valid 900 units. The total of the secondary dischargeable power and the total of the secondary chargeable power were 1000 kW and 1800 kWh, respectively.
Here, an example is given in which the baseline of the transmitted power is 0 kW and the baseline of the received power from the grid is 500 kW, which is set for the power management area 1. In this case, the local power management apparatus 200 represents 1000 kW to −1300 kW (1300=1800-500) when the discharge side is represented by a positive value (+) and the charge side is represented by a negative value (−) for controllable power. ) Range (adjustment power).

Also in this case, the controllable power may be corrected using the correction parameter in consideration of, for example, the margin and the likelihood. The correction parameter may be, for example, a coefficient by which the correction target value is multiplied, or an addition/subtraction value that is added to or subtracted from the correction target value.
For example, when a coefficient of 0.9 is set as the correction parameter, the maximum value and the minimum value of the controllable power are corrected from 6000 kWh and -300 kWh to 5600 kWh and 270 kWh, respectively.
In this case, the local power management apparatus 200 transmits the controllable power indicating the range of 900 kW to −1170 kW to the upper level apparatus 400.

The controllable power determined as described above can be controlled (adjusted) as the power management area 1 (managed area) when demand response control should be performed in response to a demand response request from the power company. Power. In the relationship between the aggregator and the electric power company, such controllable electric power may be equivalent to the planned value notified by the aggregator to the electric power company in the demand response contract. In this way, the local power management apparatus 200 transmits the controllable power to the upper level apparatus 400, so that the aggregator notifies the power company of the controllable power (planned value).

[Processing procedure example]
An example of a processing procedure executed by the facility power management apparatus 100 and the regional power management apparatus 200 according to the present embodiment will be described with reference to the flowchart of FIG.
First, an example of the processing procedure of the facility power management apparatus 100 will be described.
Step S301: The storage battery 12 of the consumer facility 10 generates storage battery information corresponding to itself at predetermined time intervals (for example, 1 minute) and transmits the storage battery information to the facility power management apparatus 100 in the same consumer facility 10. In the facility power management apparatus 100, the storage battery information acquisition unit 131 acquires the transmitted storage battery information.

Step S302: The primary chargeable/dischargeable index value calculation unit 132 calculates primary chargeable/dischargeable power (primary chargeable power, primary dischargeable power).
Step S303: The primary chargeable/dischargeable index value calculation unit 132 transmits current time corresponding power-related information including information indicating the primary chargeable/dischargeable power calculated in step S302 to the regional power management apparatus 200.

Next, an example of the processing procedure of the local power management apparatus 200 will be described.
Step S401: In the local power management apparatus 200, the control unit 202 receives the current time corresponding power related information transmitted from the facility power management apparatus 100 at the timing according to every minute in Step S303. The control unit 202 causes the storage unit 203 to store the received current time corresponding power related information.
Step S402: The control unit 202 determines whether the controllable power determination timing has been reached. If the controllable power determination timing has not come, the process returns to step S401.

Step S403: When it is determined in step S402 that the controllable power determination timing has been reached, the prediction parameter calculation unit 221 calculates prediction parameters (predicted demand power and predicted generated power). The prediction parameter calculation unit 221 receives the power demand included in the current-time power-related information, which is received in step S401 and is stored in the storage unit 203 and stored in the current-time-based power-related information, for example, a certain time past the current time. It may be calculated using information on the generated power.

Step S404: The secondary chargeable/dischargeable index value calculation unit 222 calculates the secondary chargeable/dischargeable index value (secondary dischargeable power, secondary chargeable power) based on the prediction parameter calculated in step S403. (Predict. At this time, the secondary chargeable/dischargeable index value calculation unit 222 also uses the information on the rated power of the power conditioner 14 to calculate the secondary chargeable/dischargeable power that reflects the rated power of the power conditioner 14. ..

Step S405: The controllable index value determination unit 223 calculates the sum of the secondary chargeable/dischargeable index values calculated in step S404. That is, the controllable index value determination unit 223 calculates the sum of the secondary dischargeable power and the sum of the secondary chargeable power.

Step S406: The controllable index value determination unit 223 determines the controllable power based on the controllable power calculated in step S405.
Step S407: The correction unit 225 uses the correction parameters to correct the controllable power determined in step S406.
Step S408: The controllable index value transmitting unit 224 causes the communication unit 201 to transmit the controllable power after being corrected in Step S0407 to the host device 400.

<Modification>
Hereinafter, modified examples of this embodiment will be described.
In each of the above embodiments, the correction unit 225 corrects the controllable index value (controllable power amount or controllable power). However, the correction unit 225 may correct the secondary chargeable/dischargeable index value. Further, the correction unit may be provided in the facility power management apparatus 100, and the correction unit may correct the primary chargeable/dischargeable index value.
Further, the correction by the correction unit may be performed for a plurality of the controllable index value, the secondary chargeable/dischargeable index value, and the primary chargeable/dischargeable index value.

In each of the first and second embodiments, a prediction parameter is used for the primary chargeable/dischargeable index value to calculate (predict) a secondary chargeable/dischargeable index value after a fixed time from the current time, The controllable index value was determined based on the secondary chargeable/dischargeable index value.
However, in the first embodiment and the second embodiment, the controllable index value is based on the primary chargeable/dischargeable index value without predicting the secondary chargeable/dischargeable index value after a fixed time from the current time as described above. May be determined. In this case, the prediction parameter calculation unit 221 and the secondary chargeable/dischargeable index value calculation unit 222 may be omitted.

In the second embodiment, the storage capacity of the storage battery 12 used for calculating the primary chargeable/dischargeable index value takes into consideration the deterioration of the storage battery 12, such as the value set as the specification of the storage battery 12. A value that does not exist may be used.

A program for realizing the functions of the facility power management apparatus 100 and the regional power management apparatus 200 described above is recorded in a computer-readable recording medium, and the program recorded in this recording medium is read into a computer system. Then, the processing as the facility power management apparatus 100, the regional power management apparatus 200, and the like described above may be performed. Here, “reading and executing a program recorded in a recording medium on a computer system” includes installing the program in the computer system. The “computer system” mentioned here includes an OS and hardware such as peripheral devices. Further, the “computer system” may include a plurality of computer devices connected via a network including a communication line such as the Internet, WAN, LAN, and a dedicated line. Further, the “computer-readable recording medium” refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, or a storage device such as a hard disk built in a computer system. As described above, the recording medium storing the program may be a non-transitory recording medium such as a CD-ROM. The recording medium also includes a recording medium provided inside or outside accessible from the distribution server for distributing the program. The code of the program stored in the recording medium of the distribution server may be different from the code of the program in a format executable by the terminal device. That is, the format stored in the distribution server does not matter as long as it can be downloaded from the distribution server and installed in a form executable by the terminal device. Note that the program may be divided into a plurality of programs and downloaded at different timings, and then combined by the terminal device, or the distribution server that distributes each of the divided programs may be different. Further, the "computer-readable recording medium" holds a program for a certain period of time, such as a volatile memory (RAM) inside a computer system that serves as a server or a client when the program is transmitted via a network. It also includes things. Further, the program may be for realizing a part of the functions described above. Further, it may be a so-called difference file (difference program) that can realize the above-mentioned functions in combination with a program already recorded in the computer system.

1 power management area, 2 commercial power source, 3 distribution line, 10 customer facility, 11 solar battery, 12 storage battery, 13 DC/DC converter, 14 power conditioner, 15 distribution board, 16 load, 100 facility power management device, 101 first communication unit, 102 second communication unit, 103 control unit, 104 storage unit, 131 storage battery information acquisition unit, 132 primary charge/discharge possible index value calculation unit, 200 local power management device, 201 communication unit, 202 control unit, 203 storage unit, 221 prediction parameter calculation unit, 222 secondary chargeable/dischargeable index value calculation unit, 223 controllable index value determination unit, 224 controllable index value transmission unit, 225 correction unit, 300 network, 400 upper device

Claims (10)

A power management system for managing power of a customer group including a customer including a common power conversion device for power output by a plurality of power output devices,
Among the plurality of power output devices, a generated power acquisition unit that acquires the generated power corresponding to the present of the power generator other than the storage battery,
Based on the generated power acquired by the generated power acquisition unit, at least one of the chargeable power and the dischargeable power of the storage battery corresponding to the present is calculated as a primary chargeable/dischargeable index value of the storage battery. A chargeable/dischargeable index value calculation unit,
As a prediction parameter, a prediction that calculates a predicted demand power amount that is a predicted value of the demand power amount of a customer including the storage battery, and a predicted generated power amount that is a predicted value of the generated power amount of a power generation device included in the consumer A parameter calculator,
Based on the primary charge and discharge possible index value, rated power information indicating the rated power of the power conversion device, and the prediction parameter, at least one of the future chargeable power and dischargeable power of the storage battery A power management system including: a secondary chargeable/dischargeable index value calculating unit that calculates the secondary chargeable/dischargeable index value. Calculated by the secondary chargeable/dischargeable index value calculation unit, calculating the sum of all or some of the chargeable/dischargeable index values of the storage battery to be managed, based on the sum of the calculated chargeable/dischargeable index values, A controllable index value determination unit that determines a controllable index value as controllable power that is power that can be controlled in the managed area in response to a demand response;
The power management system according to claim 1, further comprising: a controllable index value transmission unit that transmits the determined controllable index value to a predetermined external device. A correction unit is further provided, which corrects at least one of the primary chargeable/dischargeable index value, the secondary chargeable/dischargeable index value, and the controllable index value as a correction target using a predetermined correction parameter. The power management system according to 2. The power management system according to claim 3, wherein the correction parameter is a coefficient by which the correction target is multiplied. The power management system according to claim 3, wherein the correction parameter is an addition/subtraction value that is added to or subtracted from the correction target. The power management system according to any one of claims 3 to 5, wherein the correction parameter is determined based on a difference between a past demand response control command value and a control actual value. A power management method in a power management system for managing power of a customer group including a customer including a common power conversion device for power output by a plurality of power output devices,
The generated power acquisition unit, a generated power acquisition step of acquiring the generated power corresponding to the current of the power generator other than the storage battery among the plurality of power output devices,
The primary chargeable/dischargeable index value calculation unit, based on the generated power acquired by the generated power acquisition unit, at least one of the chargeable power and the dischargeable power of the storage battery corresponding to the present, of the storage battery A primary chargeable/dischargeable index value calculating step for calculating as a primary chargeable/dischargeable index value,
The prediction parameter calculation unit has, as the prediction parameters, a predicted demand power amount that is a predicted value of a demand power amount of a customer including the storage battery, and a predicted generated power that is a predicted value of a generated power amount of a power generation device included in the consumer. A prediction parameter calculation step for calculating the amount,
A secondary chargeable/dischargeable index value calculation unit, based on the primary chargeable/dischargeable index value, rated power information indicating the rated power of the power conversion device, and the prediction parameter, the storageable power of the storage battery in the future. And a dischargeable power, at least one of which is calculated as a secondary chargeable/dischargeable index value. A power management system for managing power of a customer group including a customer including a common power conversion device for power output by a plurality of power output devices,
Among the plurality of power output devices, a generated power acquisition unit that acquires the generated power corresponding to the present of the power generator other than the storage battery,
Based on the generated power acquired by the generated power acquisition unit and rated power information indicating the rated power of the power conversion device, at least one of chargeable power and dischargeable power of the storage battery corresponding to the present time A chargeable/dischargeable index value calculation unit that calculates the chargeable/dischargeable index value of the storage battery,
A power management system including. The sum of all or part of the chargeable/dischargeable index values of the storage battery to be managed, which is calculated by the chargeable/dischargeable index value calculation unit, is calculated based on the sum of the calculated chargeable/dischargeable index values. A controllable index value determining unit that determines a controllable index value as controllable power that is power that can be controlled in the management target area,
The power management system according to claim 8, further comprising: a controllable index value transmission unit that transmits the determined controllable index value to a predetermined external device. A power management method in a power management system for managing power of a customer group including a customer including a common power conversion device for power output by a plurality of power output devices,
The generated power acquisition unit, a generated power acquisition step of acquiring the generated power corresponding to the current of the power generator other than the storage battery among the plurality of power output devices,
The chargeable/dischargeable index value calculation unit, based on the generated power acquired in the generated power acquisition step and the rated power information indicating the rated power of the power conversion device, the rechargeable power of the storage battery corresponding to the present, and At least one of the dischargeable power, a chargeable and dischargeable index value calculating step of calculating as a chargeable and dischargeable index value of the storage battery,
A power management method comprising.

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