JP2019068512A - Power management device and power management method - Google Patents

Abstract

To effectively manage charge/discharge of a plurality of storage batteries.SOLUTION: A power management device according to one embodiment of the present invention, as a device for managing charge/discharge of each of storage batteries in a plurality of user facilities provided with respective storage batteries, comprises a reception part for receiving a power-adjusting request at a predetermined request time from a master aggregator; a selection order determination part for determining a selection order of each of the storage batteries, based on each power storage state of a plurality of the storage batteries in a baseline, upon the request received by the reception part; and a control part for selecting one or more foregoing storage batteries based on the selection order determined by the selection order determination part, at each predetermined unit time shorter than the request time to instruct the charge/discharge of each of the storage batteries, that has been selected, to each of a plurality of the user facilities.SELECTED DRAWING: Figure 2

Description

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

  Patent Document 1 describes a power management system that determines the amount of reduced power to be reduced by each customer according to the maximum value of the contract current value when dealing with demand response. Here, the demand response (DR: Demand Response) means that the consumer side suppresses the use of power according to the setting of the electricity rate or the payment of the incentive when the wholesale market price rises or the system reliability declines. It is defined as changing power consumption patterns.

  BACKGROUND ART Conventionally, demand response at the time of peak power consumption has been performed in large-scale customers with large power consumption such as factories and buildings by demand suppression, storage battery control and the like. For example, when there is a demand for demand suppression at the peak of demand during the cooling operation period, the demand is suppressed by raising the air conditioning set temperature or stopping the device with low importance among various devices such as lighting. Moreover, in the demand suppression method using a storage battery, a large storage battery is charged in advance and discharged at a designated time for demand suppression, and purchased power during that time is suppressed for a predetermined time.

  On the other hand, in a consumer such as a general house, since the power consumption is not large, the range in which the demand can be suppressed is small. Therefore, even if the demand in general housing is restrained, the sufficient effect of the demand restraint can not be expected. On the other hand, in recent years, based on the contract between the aggregator and a number of consumers, the amount of reduction in demand for electric power made in response to requests from electric utilities (including retail electric utilities and system operators), etc. Efforts to trade capacity are being considered. Here, an aggregator (also referred to as a DR aggregator) is a business that bundles a plurality of customers and trades the amount of demand reduction by DR with an electric power company.

  Further, with the introduction and expansion of power generation facilities using renewable energy, such as solar power generation facilities, it is considered to include an increase in demand as well as a reduction in demand in the change in power consumption pattern in demand response. That is, in the case where an excessive supply of power occurs, it is considered that the quality of electricity in the distribution system is stabilized by urging the consumer to increase the consumption of power.

Patent No. 5922138 gazette

  By the way, in consumers such as general houses, the introduction of storage batteries is being promoted along with the introduction of power generation equipment using renewable energy. Charging and discharging of storage batteries is considered to contribute to the reduction of demand for electric power and increase in demand, and there is a need for an apparatus and method for effectively managing charging and discharging of multiple storage batteries possessed by multiple consumers such as general houses. .

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a power management apparatus and a power management method capable of effectively managing charging and discharging of a plurality of storage batteries.

  In order to solve the above-mentioned subject, one mode of the present invention is a device which manages charge and discharge of each storage battery in a plurality of customer facilities which each has a storage battery, and electric power adjustment in predetermined demand time from a parent aggregator A reception unit for receiving a request for the selection, and a selection order determination unit for determining the selection order of each storage battery based on each storage state of the plurality of storage batteries in the baseline according to the request received by the reception unit; One or more storage batteries are selected based on the selection order determined by the selection order determining unit every predetermined unit time shorter than the request time, and charging / discharging of each selected storage battery is performed on each of the customer facilities And a control unit that instructs to

  Further, one aspect of the present invention is the power management apparatus, wherein the selection order determination unit changes the selection order as needed based on predetermined measured values concerning power adjustment for each of a plurality of unit times. Do.

  Further, one aspect of the present invention is the power management apparatus, wherein the selection order determination unit sets a group consisting of one or more storage batteries so as to satisfy the request, and for each of the set groups set. The selection order is determined.

  Further, one aspect of the present invention is the power management apparatus, wherein the selection order determination unit determines the storage battery not assigned to any of the groups when the group not satisfying the request is confirmed. The group is reconfigured by assigning to the group.

  Further, one aspect of the present invention is the power management apparatus, wherein the selection order determination unit disassembles any of the groups when the groups that do not satisfy the request are confirmed, and re-arrange the groups Set

  Moreover, 1 aspect of this invention is the said power management apparatus, Comprising: The said control part instruct | indicates charging / discharging by the rated power of each said selected said storage battery with respect to each said consumer facility.

  Further, one aspect of the present invention is the power management apparatus, wherein the storage state is an available amount, and the selection order determination unit selects the storage batteries according to the storage state in a baseline. The order is determined, and the selection order is updated based on each estimated value of the state of charge for each unit time.

  Further, one aspect of the present invention is the power management apparatus, wherein the storage state is a charging rate, and the selection order determination unit determines the selection order of the storage batteries according to the storage state in a baseline. And updating the selection order based on each estimated value of the state of charge for each unit time.

  Further, one aspect of the present invention is a method of managing charge and discharge of each storage battery in a plurality of customer facilities each having a storage battery, wherein the receiving unit adjusts power at a predetermined request time from the parent aggregator. The request is received, and the selection order determining unit determines the selection order of the storage batteries based on the storage states of the plurality of storage batteries in the baseline according to the request received by the reception unit, and the control unit The one or more storage batteries are selected based on the selection order determined by the selection order determining unit every predetermined unit time shorter than the requested time, and charging / discharging of each selected storage battery is applied to each of the customer facilities It is a power management method directed to.

  According to the present invention, charging and discharging of a plurality of storage batteries can be effectively managed.

It is a schematic diagram which shows the structural example of the storage battery group management system which concerns on one Embodiment of this invention. It is a block diagram which shows the structural example of the power management apparatus 10 shown in FIG. It is a flowchart which shows the operation example of the control apparatus 12 shown in FIG. It is a schematic diagram for demonstrating the operation example of the control apparatus 12 shown in FIG. 5 is a flowchart showing another operation example of the control device 12 shown in FIG. It is explanatory drawing for demonstrating the operation example of the control apparatus 12 shown in FIG. 7 is a flowchart showing yet another operation example of the control device 12 shown in FIG. FIG. 10 is an explanatory view for comparing the operation examples shown in FIGS. 3, 5 and 7; FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It is a schematic diagram which shows the structural example of the storage battery group management system which concerns on one Embodiment of this invention. The storage battery group management system 1 illustrated in FIG. 1 includes a power management device 10, a plurality of customer facilities 20 such as general households, and a large customer facility 30. The plurality of customer facilities 20 each have a storage battery 21. The customer facility 30 has a storage battery 31. The number of customer facilities 30 may be zero or more.

  The power management apparatus 10 bundles a plurality of customers (a plurality of customer facilities 20 and a customer facility 30) to reduce demand due to DR or increase demand (collectively referred to as demand change) as a parent aggregator such as an electric power company A computer such as a server operated by a business operator (aggregator) that trades with the The power management apparatus 10 communicates a request for power adjustment (a request for power adjustment) in a plurality of customer facilities 20 and demand facilities 30 from the upper control system 50 (computer such as a server) operated by a power company or the like (parent aggregator) Received via the line 60. In addition, the power management apparatus 10 selects one or more storage batteries 21 or storage batteries 31 according to the received request for power adjustment, and each customer facility 20 or customer facility having the selected storage battery 21 or storage battery 31. A charge / discharge command is sent to 30 via the communication line 40, and charge / discharge in each selected storage battery 21 or storage battery 31 is controlled.

  In the present embodiment, the power adjustment request includes a request for reducing the demand for the plurality of customer facilities 20 managed by the power management apparatus 10 and the demand facility 30 as a whole and a request for increasing the demand. Demand for demand reduction includes demand for reduction of tidal power and demand for increase of reverse tidal power. In addition, the request for the power adjustment may include content for directly instructing changes in charge / discharge power, discharge power, or charge power in storage battery 21 or storage battery 31.

  The storage battery group management system 1 can be configured (for example, as one function) included in a power management system such as, for example, a Town Energy Management System (TEMS) or a Community Energy Management System (CEMS). Further, the power management apparatus 10 can be configured (for example, as one function) included in a management apparatus (management server) in a power management system such as TEMS or CEMS. Here, TEMS and CEMS are systems which collectively manage electric power in a plurality of customer facilities 20 such as houses, commercial facilities, industrial facilities, and customer facilities 30 in a predetermined area range, for example. In this case, the power management apparatus 10 manages (for example, estimates and controls) charge / discharge power of the plurality of storage batteries 21 and storage batteries 31 possessed by the plurality of customer facilities 20 and demand facilities 30. It can be configured as a device that performs management (prediction and control) and management (prediction and control) of power consumption of load equipment. The customer facilities managed by the power management apparatus 10 may include customer facilities that do not have a storage battery. In the present embodiment, the predetermined area range may be formed by one area range, or may be formed by a plurality of geographically dispersed area ranges.

  FIG. 2 is a block diagram showing a configuration example of the power management apparatus 10 and the customer facility 20 shown in FIG. In the configuration example illustrated in FIG. 2, the customer facility 20 includes a communication unit 24, a control device 22, a distribution board 23, a storage battery 21, a power generation facility 25, a power load facility 26, and a power meter 28.

  The communication unit 24 transmits and receives predetermined information to and from the power management apparatus 10 via the communication line 40. The communication line 40 includes a communication line 43, a network 41 such as the Internet, and a communication line 42.

  The control device 22 controls the electric equipment (the power generation facility 25, the storage battery 21, the power load facility 26, the communication unit 24, and the like) in the customer facility 20. Moreover, the control apparatus 22 can input the information of the power consumption measured by the electric power meter 28, and can utilize the information of the input power consumption for various control.

  In the present embodiment, among the storage battery 21, the power generation facility 25, and the power load facility 26 included in the customer facility 20, one that can be controlled by the power management apparatus 10 via the control device 22 is called a power facility. In the present embodiment, the charge power and the discharge power of the storage battery 21 are controlled by the power management device 10. In addition, the generated power may be controllable by the power management apparatus 10 in part or all of the power generation facility 25. In addition, the power management apparatus 10 may control the power consumption of a part or all of the power load equipment 26. That is, the storage battery 21 and the power generation facility 25 and the power load facility 26 that can be controlled by the power management apparatus 10 are power facilities.

  The control device 22 controls charge / discharge power, generated power, power consumption, and the like of the power equipment provided in the customer facility 20 according to the instruction received from the power management apparatus 10. At this time, control device 22 controls the charge / discharge power of storage battery 21 in accordance with the charge / discharge command received from power management device 10.

  The controller 22 also collects power related information in the customer premises 20. The control device 22 can collect, for example, information on the supply and demand power measured by the power meter 28. Further, the control device 22 can collect power generated by the power generation facility 25, remaining capacity (stored power) of the storage battery 21, charge / discharge power, load power (power consumption) by the power load facility 26 and the like. The control device 22 also manages the collected information such as generated power, charge / discharge power, demand power, supply / demand power, etc. from the communication unit 24 at predetermined time intervals or in response to a request from the power management apparatus 10. Send to device 10.

  The distribution board 23 distributes and supplies the power supplied from the lead-in wire 71 via the power meter 28 to the storage battery 21, the power load facility 26 and the like via the wiring 27. The lead-in line 71 is a component of the distribution system on the general transmission and distribution company side. Further, the distribution board 23 can output the power output from the power generation facility 25 or the like to the lead-in line 71 via the power meter 28 for reverse power flow.

  The storage battery 21 is a facility that stores electric power input for charging, and discharges and outputs the stored electric power. The storage battery 21 includes, for example, a secondary battery and an inverter. The storage battery 21 stores (charges) power and outputs (discharges) the stored power. The inverter converts power for charging the secondary battery from alternating current to direct current, and converts power output from the secondary battery by discharging from direct current to alternating current. That is, the inverter performs bidirectional conversion of the power input / output to / from the secondary battery. The charge and discharge power of the storage battery 21 is controlled by the control device 22.

  The storage battery 21 can be charged by inputting the power of the commercial power supplied from the distribution board 23. In addition, the storage battery 21 can be charged by inputting the power generated by the power generation facility 25. In addition, the storage battery 21 can supply the stored power as a power source of the power load facility 26. In addition, the storage battery 21 can cause reverse power flow by outputting the stored power from the distribution board 23 to the service line 71 via the power meter 28.

  The power generation facility 25 is, for example, a facility that receives sunlight to generate power. The power generation facility 25 includes, for example, a solar cell and a PCS (Power Conditioning System). The power generation facility 25 receives sunlight and generates electric power, converts the electric power obtained by the electric power generation into alternating current by the PCS, and outputs it.

  The electric power generated by the power generation facility 25 can be supplied as a power source of the power load facility 26. Further, the power generated by the power generation facility 25 can be charged to the storage battery 21. In addition, the power generated by the power generation facility 25 can be reversely flowed by being output from the distribution board 23 to the service line 71 via the power meter 28.

  The power generation facility 25 and the storage battery 21 may be integrated with the configuration of the power conversion circuit or the like.

  The power load facility 26 collectively indicates one or a plurality of predetermined devices, facilities, and the like that consume power for their own operation in the customer facility 20. In addition, the types, the number, and the like of the devices, facilities, and the like as loads provided in each customer facility 20 may be different. The power load facility 26 can operate by receiving the commercial power supplied from the distribution board 23. Also, the power load facility 26 can operate by receiving the power generated by the power generation facility 25. Further, the power load facility 26 can operate by receiving the power output from the storage battery 21.

  Further, the power load facility 26 includes a load whose power consumption can be controlled by the control device 22 or the like, such as a hot water storage type water heater, a heat storage type air conditioner, a clothes dryer, a tableware dryer, a storage battery (load as a charge target). It may be

  The power meter 28 measures the required power and the generated power. That is, the power meter 28 measures supply and demand power. The supply and demand power is, for example, the difference between the required power and the generated power. In the customer facility 20, the power supplied from the service line 71 to the distribution board 23 is demand power. On the other hand, the power output from the storage battery 21 or the power generation facility 25 and supplied from the distribution board 23 to the service line 71 via the power meter 28 is generated power. Assuming that the forward flow corresponding to the demand power is in the forward direction, if the generated power corresponding to the reverse flow is smaller than the demand power corresponding to the forward flow, the supply and demand power is measured as a positive value, relative to the demand power If the generated power is large, the supply and demand power is measured as a negative value. The power meter 28 generates electricity by, for example, a demand meter for measuring demand power used in one customer facility 20 and a power generation facility 25 using natural energy such as a solar power generator in one customer facility 20. And a power generation meter for measuring the generated power.

  The power meter 28 may transmit information of the measured supply and demand power to the power management apparatus 10 via, for example, the network 41 as a smart meter. In this case, the control device 22 may not collect the supply and demand power measured by the power meter 28.

  The customer facility 20 may include either the storage battery 21 or the power generation facility 25. In addition, the customer facility 20 may have neither the storage battery 21 nor the power generation facility 25. The power generation facility 25 is not limited to one using a solar cell, and may be a power generation device that generates power using other renewable energy such as wind power generation, geothermal power generation, or a combination thereof.

  Further, the storage battery 21 and the power generation facility 25 provided in the customer facility 20 are interconnected with a commercial power source. Thus, the customer facility 20 provided with the storage battery 21 or the power generation facility 25 causes the power generated by the power generation facility 25 to output or the power output from the storage battery 21 by discharging to the power system (distribution network) of the commercial power supply. Can be sold through the power system.

  The customer facility 30 has the same basic configuration as the customer facility 20. That is, in the customer facility 30, according to the instruction received from the power management apparatus 10, charge / discharge power, generated power, power consumption, and the like of the power equipment provided in the customer facility 30 are controlled. At that time, in the customer facility 30, the charge / discharge power of the storage battery 31 is controlled in accordance with the charge / discharge command received from the power management apparatus 10. However, in general, commercial power is distributed to the customer facility 20 from a pole transformer connected to the high voltage distribution line of the distribution system, a road transformer, etc. via the low voltage distribution line. The commercial power is distributed to 30 directly from, for example, a high voltage distribution line.

  On the other hand, the power management apparatus 10 includes a communication unit 11, a control device 12, and a storage unit 13. The control device 12 can be configured by, for example, a combination of hardware such as a CPU (central processing unit), a main storage device, an auxiliary storage device, an input / output device, and a predetermined program executed by the CPU.

  In the present embodiment, the power management apparatus 10 manages the supply and demand of power in each of the customer facilities 20 and the customer facilities 30 in correspondence with, for example, the planned value simultaneous same amount system. That is, the operator of the power management apparatus 10 formulates the power supply and demand plan for each predetermined unit planning time (for example, 30 minutes) for each customer facility 20 and the customer facility 30 as a whole, and formulates the power supply and demand plan To the general power transmission and distribution company. In addition, if the power supply and demand performance of each customer facility 20 and the customer facility 30 as a whole causes an excess or deficiency (inbalance) with the electric power supply and demand plan, between the electric power company and the general power transmission and distribution company The settlement corresponding to the imbalance (inbalance settlement) is performed.

  The power supply and demand plan in the present embodiment includes a power generation plan and a demand plan. The power generation plan may have planned values for each of the customer facilities 20 and the customer facilities 30 as a whole, and individual planned values for the customer facilities 20 and 30 for the power to be reversely flowed to the distribution network. The demand plan may have planned values for each customer facility 20 and customer facility 30 as a whole for power purchased from the distribution network in a forward flow manner, and individual planned values for the customer facility 20.

  Under the plan value simultaneous capacity system to which this embodiment corresponds, it is required that the actual results be achieved as planned for the power generation plan and the demand plan. That is, in the planned value simultaneous equivalence amount system to which the present embodiment corresponds, it is required that the results of the power reversely flowed from each customer facility 20 and the customer facility 30 as a whole have no excess or deficiency to the power generation plan. It is required that the performance of power receiving forward flow as a whole for each customer facility 20 and customer facility 30 be equal to or less than the demand plan. In the present embodiment, the generated power refers to the power to be reversely flowed to the distribution network. In addition, demand power refers to the power to be transferred forward from the distribution network. In the present embodiment, the generated power includes the power generated by the power generation facility 25 and the power discharged by the storage battery 21.

  The power management apparatus 10 performs power control on the power facilities in each customer facility 20 and the entire customer facility 30. Power management apparatus 10 is connected so as to be able to mutually communicate with each of customer facility 20 and customer facility 30 via communication line 40 configured of network 41 such as the Internet, communication line 42 and communication line 43. It is done. Thus, the power management apparatus 10 can control the operation of the power facilities provided in the customer facility 20 and the customer facility 30. Also, the power management apparatus 10 is connected via the communication line 60 so as to be able to mutually communicate with the upper control system 50.

  The communication unit 11 communicates with the control device 22 in the customer facility 20 via the communication line 40. The communication unit 11 communicates with the upper control system 50 via the communication line 60. Similarly to the communication line 40, the communication line 60 may be configured via the network 41 such as the Internet.

  The storage unit 13 stores information used by the control device 12 in power management. The storage unit 13 of the present embodiment stores power generation plan information 131, demand plan information 132, and customer facility basic information 133.

  The power generation plan information 131 is information indicating generated power according to the formulated power generation plan. The demand plan information 132 is information indicating the power demand according to the formulated demand plan. The customer facility basic information 133 includes basic information on each customer facility 20 and customer facility 30. For example, in the customer facility basic information corresponding to one customer facility 20, a customer facility ID (identification code) uniquely indicating the customer facility 20, a value of contract power of the customer facility 20, a power generation facility 25 Rated power value, rated power value (rated power output) value of storage battery 21 (rated charge / discharge power value, rated discharge power value or rated charge power value) and capacity, power load equipment with which the customer facility 20 is equipped 26 includes information on the communication unit 24 and the address of the control device 22 provided in the customer facility 20.

  The control device 12 includes a power control unit 121, a reception unit 122, a selection order determination unit 123, and a storage battery control unit 124.

  The power control unit 121 determines each demand based on the power generation plan information 131 and the demand plan information 132 stored in the storage unit 13 and the actual value (measured value) of the power supply and demand in each customer facility 20 and customer facility 30. Control the power equipment in the household facility 20 and the customer facility 30.

  The receiving unit 122 receives, via the communication unit 11, a request for power adjustment at a predetermined request time from the upper control system 50 operated by a power company or the like that is a parent aggregator. The predetermined request time is a time during which power adjustment, ie, demand reduction or demand increase, is required, and is defined by, for example, start time and end time or start time and duration. The power adjustment request corresponds to the DR request, and includes information indicating the power adjustment request time, the value of power for which demand reduction or demand increase is requested, the value of power amount, and the like.

  The selection order determination unit 123 changes charge / discharge power according to the request based on the storage states of the plurality of storage batteries 21 and storage batteries 31 in the baseline in response to the request for power adjustment received by the reception unit 122. The selection order of each storage battery 21 and storage battery 31 is determined. Here, the baseline is the power consumption assumed when there is no request for power adjustment. The baseline can be obtained from the power generation plan and the demand plan under the plan value simultaneous amount system. Alternatively, in the present practical form, the baseline may be determined based on the actual value of the generated power and the actual value of the demand plan. In the present embodiment, the storage state is information indicating the degree of the remaining capacity of charge or discharge with reference to the baseline assumed in the request time. The storage state can be represented, for example, by the difference or ratio between the rated power (maximum charge power or maximum discharge power) of the storage battery 21 or storage battery 31 and the charge power or discharge power at the baseline, the available amount or the charge rate. In addition, the selection order can be satisfied if each of the storage batteries 21 can meet the reduction or increase in the requested power or the amount of power by changing the charge / discharge power with some of the plurality of storage batteries 21 and storage batteries 31 instead of all. And it is the order of selection of each storage battery 21 at the time of selecting the storage battery 21 which changes charge / discharge electric power from the whole storage battery 31, and the storage battery 31, and the storage battery 31. In the present embodiment, the selection order can be set for each storage battery 21 or storage battery 31 or can be set for each group (group) of a plurality of storage batteries 21 or storage batteries 31. That is, in the present embodiment, the selection order determination unit 123 determines, based on planned values (or actual values) of charge / discharge power and remaining capacity of each of the plurality of storage batteries 21 and storage batteries 31 when there is no request for power adjustment. The order of selection of each storage battery 21 and storage battery 31 is determined for each storage battery 21 and storage battery 31 or for each predetermined group based on the degree of remaining capacity of charge and discharge power assumed in the request time.

  The storage battery control unit (control unit) 124 selects one or more storage batteries 21 or storage batteries 31 based on the selection order determined by the selection order determination unit 123 for each predetermined unit time shorter than the request time, 21. The charge / discharge command is transmitted to the storage battery 31 or the storage battery 31, and the control of the charge / discharge power in the selected storage battery 21 or storage battery 31 is instructed to each customer facility 20 or 30. Here, the charge / discharge command is, for example, information indicating a target unit time, information indicating a target value of average discharge power in the unit time or a target value of average charge power, or a discharge power amount in the unit time And information indicating the target value of the charging power amount.

  Note that the selection order determining unit 123 may change the selection order as needed based on predetermined measured values related to the power adjustment for each of a plurality of unit times. Here, the predetermined actual measurement value related to the power adjustment is, for example, a value of the demand reduction or the demand increase that can be actually generated. In this case, calculation can be made based on the difference between the actual measurement value of charge / discharge power in each storage battery 21 or storage battery 31 or the actual measurement value of supply / demand power in each customer facility 20 or customer facility 30 and the baseline. Alternatively, the predetermined actual measurement value related to the power adjustment may be, for example, an actual measurement value of the charged / discharged electric power, an actual measurement value of the storage capacity, or the like. Further, each of the plurality of unit times means that a plurality of unit times are used instead of one unit time.

  Next, an operation example of the control device 12 shown in FIG. 2 will be described with reference to FIGS. 3 and 4. FIG. 3 is a flow chart showing an operation example of the control device 12 shown in FIG. FIG. 4 is a schematic view for explaining an operation example of the control device 12 shown in FIG. In the operation example shown in FIG. 3, when the receiving unit 122 shown in FIG. 2 receives a request for power adjustment, increase / decrease of the requested power demand (or demand energy amount) is obtained from the plurality of storage batteries 21 or storage batteries 31. It is an example of operation at the time of corresponding by charge and discharge. Further, in this operation example, the way of determining the selection order by the selection order determining unit 123 is a county unit (county unit order). FIG. 4 schematically shows an example in which twelve storage batteries 21 are numbered "1" to "12", grouped (grouped), and charge or discharge control is performed for each group. The process shown in FIG. 3 is repeatedly performed. Hereinafter, an operation example will be described by taking a case where twelve storage batteries 21 shown in FIG. 4 are to be controlled as an example.

  In the process illustrated in FIG. 3, when the receiving unit 122 receives a request for power adjustment from the upper control system 50 (“YES” in step S101), the storage battery control unit 124 (or the selection order determining unit 123) receives the adjustment start time. It waits until it becomes (it repeats "NO" at Step S102). When the adjustment start time is reached ("YES" in step S102), the selection order determining unit 123 determines the number of groups (step S103).

  For example, it is assumed that the request for power adjustment received by the receiving unit 122 is a request for reducing the demand or increasing the demand for X kW (X kilowatts). Further, in the twelve storage batteries 21 shown in FIG. 2, it is assumed that the total of remaining capacity for demand reduction or the total capacity for increased demand is Y kW (Y kilowatts) based on the baseline.

  The remaining capacity for demand reduction corresponds to the discharge power from the storage battery 21 that can be increased and the charge power to the storage battery 21 that can be reduced, with reference to the baseline. The remaining capacity of the demand increase corresponds to the discharge power from the storage battery 21 which can be decreased and the charge power to the storage battery 21 which can be increased with reference to the baseline.

  In the present embodiment, the remaining capacity of the demand reduction is the sum of the demand power expected to be reduced based on the baseline when discharged from the twelve storage batteries 21 at the rated discharge power (maximum power). That is, the remaining capacity for demand reduction can be discharged from the storage battery 21 to the electric power (= rated discharge power) that can be discharged from the storage battery 21 not performing charging and discharging in the baseline and to the charging power of the storage battery 21 being charged in the baseline. It is the sum of the power to which the power (= rated discharge power) is added and the power which can be further discharged from the storage battery 21 being discharged at the base line (= power obtained by removing the power being discharged from the rated discharged power).

  Further, in the present embodiment, the remaining capacity of the demand increase is the sum of the demand power expected to increase with reference to the baseline when the twelve storage batteries 21 are charged with the rated charge power (maximum power). That is, the remaining capacity of the demand increase is the power (= rated charging power) that can charge the storage battery 21 that is not performing charging and discharging, and the power that can charge the storage battery 21 to the discharging power of the storage battery 21 during discharging (= rated charging power And the electric power capable of further charging the storage battery 21 being charged (= the power obtained by removing the power being charged from the rated charging power).

  Hereinafter, the request for the power adjustment received by the receiving unit 122 will be described as a request for demand reduction. In this case, in step S103, the power for which demand reduction is requested is X kW, and the remaining capacity for demand reduction is Y kW, and the selection priority determination unit 123 sets Y / X integer part obtained by dividing Y by X as the number of groups. . For example, if the demand reduction power of demand reduction X is 7 kW and the remaining capacity Y of demand reduction is 24 kW as a whole of the storage battery 21 of 12 units, Y / X = 24/7 = about 3.4, so the selection ranking decision unit 123 The number of groups is determined to "3" which is the integer part of Y / X.

  Next, the selection order determination unit 123 numbers the twelve storage batteries 21 (step S104). In the example of FIG. 4, as shown to Fig.4 (a), the number of "1"-"12" is allocated to the 12 storage batteries 21 sequentially from the left. This number is the order of allocation when allocating each storage battery 21 to each group. For example, the numbers may be randomly distributed so as to be different each time, or the numbers may be sequentially advanced or decremented by 1 (for example, the next set number for the storage battery 21 of which the number is “1” is “12”, the number The number to be set next to the storage battery 21 of “2” can be choreographed) or the like.

  Next, the selection order determination unit 123 divides the 12 storage batteries 21 into the first group 80-1, the second group 80-2, or the third group 80-3 in numerical order. (Step S105). At this time, the selection order determination unit 123 performs grouping so that the remaining capacity of demand reduction for each group exceeds the power XkW for which demand reduction is requested (step S105).

  In the example shown to Fig.4 (a), three storage batteries 21 of number "1"-"3" are distributed to the 1st group 80-1. In this case, it means that the remaining capacity of the demand reduction of the total of three storage batteries 21 of numbers “1” to “3” exceeds X kW. Moreover, four storage batteries 21 of numbers "4" to "7" are distributed to the second group 80-2. In this case, it means that the remaining capacity of the demand reduction of four storage batteries 21 of the numbers “4” to “7” exceeds X kW. Further, three storage batteries 21 of numbers "8" to "10" are distributed to the third group 80-3. In this case, it means that the remaining capacity of the demand reduction of the total of three storage batteries 21 of numbers “8” to “10” exceeds X kW. And two storage batteries 21 of numbers "11" and "12" are not distributed to any group. The control corresponding to the request for the power adjustment is not performed on the two storage batteries 21 of the numbers “11” and “12” that do not belong to any group.

  Next, the storage battery control unit 124 selects a group to perform charge / discharge control (step S106). In the example illustrated in FIG. 4, the storage battery control unit 124 selects the first group 80-1.

  Next, the storage battery control unit 124 executes charge / discharge control of the selected group (step S107). In the example illustrated in FIG. 4, each storage battery for each customer facility 20 having storage batteries 21 of numbers “1” to “3” belonging to the first group 80-1 selected by storage battery control unit 124 21 sends a charge / discharge command instructing discharge at rated power (maximum power). In each customer facility 20 provided with each storage battery 21 of numbers “1” to “3”, discharge power is controlled with the rated power as a target in the instructed unit time based on the received charge / discharge command. In each customer facility 20, after the instructed unit time has elapsed, charge / discharge power is controlled based on the planned value when there is no charge / discharge command. In each customer facility 20, charge / discharge power of storage battery 21 and demand / supply power of customer facility 20 are measured in the instructed unit time, and the measured values of charge / discharge power and demand / supply power are measured by power management device 10 Sent to.

  Next, the storage battery control unit 124 determines whether or not the adjustment end time has been reached (step S108). If the adjustment end time has been reached (“YES” in step S108), the control device 12 temporarily ends the process shown in FIG. 3 and starts the process shown in FIG. 3 again. On the other hand, if the adjustment end time has not been reached (“NO” in step S108), the storage battery control unit 124 determines whether a unit time has elapsed (step S109). The unit time is a time of charge / discharge control according to a request that one group takes charge of. If the unit time has not elapsed ("NO" in step S109), storage battery control unit 124 determines again whether or not the adjustment end time has been reached (step S108).

  In the process shown in FIG. 3, the power adjustment request time is, for example, 30 minutes to several hours. On the other hand, unit time can be made into 3 minutes-10 minutes, for example.

  If the unit time has elapsed ("YES" in step S109), the storage battery control unit 124 selects the next group as a target of charge / discharge control (step S110). In the example of FIG. 4, as shown in FIG. 4 (b), the storage battery control unit 124 selects the second group 80-2.

  Next, the storage battery control unit 124 determines whether the group selected in step S110 is the first group (step S111). The first group is the group selected by the storage battery control unit 124 in step S106. In the example of FIG. 4 (b), the first group is group 80-1.

  If it is not the first group ("NO" in step S111), the storage battery control unit 124 executes charge / discharge control of the selected group (in this case, the group 80-2) (step S107). In the example shown in FIG. 4B, for each customer facility 20 having storage batteries 21 of numbers "4" to "7" belonging to the selected second group 80-2, storage battery control unit 124 Each storage battery 21 transmits a charge / discharge command instructing discharge at rated power (maximum power). In each customer facility 20 provided with each storage battery 21 of the numbers “4” to “7”, the discharge power is controlled with the rated power as a target in the instructed unit time based on the received charge / discharge command. In each customer facility 20, after the instructed unit time has elapsed, charge / discharge power is controlled based on the planned value when there is no charge / discharge command. In each customer facility 20, charge / discharge power of storage battery 21 and demand / supply power of customer facility 20 are measured in the instructed unit time, and the measured values of charge / discharge power and demand / supply power are measured by power management device 10 Sent to.

  Next, it is determined whether the storage battery control unit 124 has reached the adjustment end time (step S108). If the adjustment end time has not been reached (“NO” in step S108), the storage battery control unit 124 determines whether a unit time has elapsed (step S109). If the unit time has elapsed ("YES" in step S109), the storage battery control unit 124 selects the next group as a target of charge / discharge control (step S110). In the example of FIG. 4, as shown in FIG. 4 (b), the storage battery control unit 124 selects the third group 80-3.

  Next, the storage battery control unit 124 determines whether the group selected in step S110 is the first group (step S111). If it is not the first group ("NO" in step S111), the storage battery control unit 124 executes charge / discharge control of the selected group (in this case, the group 80-3) (step S107). In the example shown in FIG. 4B, for each customer facility 20 having storage batteries 21 of numbers “8” to “10” belonging to the selected third group 80-3, storage battery control unit 124 Each storage battery 21 transmits a charge / discharge command instructing discharge at rated power (maximum output). In each customer facility 20 provided with each storage battery 21 of the numbers “8” to “10”, the discharge power is controlled with the rated power as a target in the target unit time based on the received charge and discharge command. In each customer facility 20, after the target unit time has elapsed, the charge / discharge power is controlled based on the planned value when there is no charge / discharge command. In each customer facility 20, charge / discharge power of storage battery 21 and demand / supply power of customer facility 20 are measured in the instructed unit time, and the measured values of charge / discharge power and demand / supply power are measured by power management device 10 Sent to.

  Next, it is determined whether the storage battery control unit 124 has reached the adjustment end time (step S108). If the adjustment end time has not been reached (“NO” in step S108), the storage battery control unit 124 determines whether a unit time has elapsed (step S109). If the unit time has elapsed ("YES" in step S109), the storage battery control unit 124 selects the next group as a target of charge / discharge control (step S110). In the example of FIG. 4, as shown in FIG. 4 (b), the currently selected group 80-3 is the last group (ie, the fourth group is not set), so the storage battery control unit 124 , First return to select the first group 80-1.

  Next, because the group (group 80-1) selected in step S110 is the first group ("YES" in step S111), storage battery control unit 124 confirms the control result of the charge / discharge control of each storage battery 21 (step S112). In step S112, the storage battery control unit 124 determines whether the charge / discharge control performed for each group in step S107 satisfies the requested power X kW as confirmation of the control result of the charge / discharge control. That is, in step S112, the storage battery control unit 124 determines that the actual value of demand reduction or increase in demand due to charge / discharge control performed for each group (an example of a predetermined actual value related to power adjustment) satisfies the requested power XkW Determine if it was a value.

  For example, based on the actual value of the charge / discharge power of each storage battery 21 subjected to charge / discharge control in step S107, the storage battery control unit 124 in step S112 changes the charge / discharge power based on the baseline for each group. It is determined whether the requested power XkW is within a predetermined range. Alternatively, for example, in step S112, the storage battery control unit 124 sets the baseline for each group based on the measured value of the supply and demand power of each customer facility 20 provided with each storage battery 21 charge and discharge controlled in step S107. It is determined whether the change in supply and demand power is within the predetermined range for the requested power XkW. Alternatively, the storage battery control unit 124 charges / discharges each storage battery 21 at the rated power (maximum power) based on the measured value of the charge / discharge power of each storage battery 21 subjected to charge / discharge control in step S107, for example (step S112) Then, it is determined whether or not the battery can be discharged, and if not, it is determined whether the ratio or difference of the charge / discharge power (discharge power in this example) to the rated power is within a predetermined range.

  Next, based on the check result of the control result by the storage battery control unit 124 in step S112, the selection order determination unit 123 determines whether or not the grouping needs to be reconfigured (step S113). In step S113, if it is confirmed in the confirmation result in step S112 that there is a group in which the requested power XkW can not be satisfied within the predetermined range, the selection order determination unit 123 determines that reconfiguration is necessary. If it is determined that it has not been determined, it is determined that reconfiguration is not necessary.

  If selection order determination unit 123 determines that reconfiguration is not necessary ("NO" in step S113), storage battery control unit 124 charges / discharges the selected group (in this case, group 80-1) in the same manner as described above. Control is executed (step S107).

  On the other hand, if selection order determination unit 123 determines that reconfiguration is necessary (“YES” in step S113), selection order determination unit 123 can not satisfy requested power X kW within a predetermined range 1 Alternatively, the storage battery 21 not belonging to the group is added to the plurality of groups so as to exceed the power X kW (step S114). However, in step S114, if there is no storage battery 21 not belonging to the group, or if the storage battery 21 does not exist from the beginning, the selection order determination unit 123 does not add the storage battery 21.

  For example, as shown in FIG. 4C, the remaining capacities of the storage battery 21 of number “6” and the storage battery 21 of number “7” shown by hatching run short, and in the case of charge / discharge control of group 80-2. It is assumed that discharge power satisfying the requested power XkW within a predetermined range can not be secured. In this case, as shown in FIG. 4D, in step S114, the selection order determination unit 123 determines that the storage battery 21 of the number "11" and the storage battery 21 of the number "12" do not belong to the groups 80-1 to 80-3. Is added to the group 80-2 so as to exceed the power XkW. In the example shown in FIG. 4E, both the storage battery 21 of number "11" and the storage battery 21 of number "12" are added to the second group 80-2. In this case, the storage batteries 21 not belonging to the group disappear. Further, in this case, the selection order of the storage battery 21 of the number "11" and the storage battery 21 of the number "12" is based on the selection ranking of the respective storage batteries 21 of the numbers "8" to "10" belonging to the group 80-3. It has been changed to be higher.

  Next, the selection ranking determination unit 123 determines whether the remaining capacity for demand reduction or demand increase (in this example, demand reduction) in each group satisfies the requested power XkW within a predetermined range (predetermined error range). It is determined (step S115). If selection order determination unit 123 determines that all the groups are satisfied ("YES" in step S115), storage battery control unit 124 charges / discharges the selected group (in this case, group 80-1) in the same manner as described above. Control is executed (step S107).

  On the other hand, when it is determined that one of the groups is not satisfied (“NO” in step S115), the selection order determination unit 123 determines whether the number of the current group is two or more (step S116). If it is not 2 or more (step S116 “NO”), the storage battery control unit 124 executes charge / discharge control of the selected group (in this case, the group 80-1) in the same manner as described above (step S107). On the other hand, in the case of two or more (“YES” in step S116), the selection order determination unit 123 disassembles the last group and sets the storage battery 21 belonging to the last group as the storage battery 21 not belonging to the group (step S117). , Add the storage battery 21 not belonging to the group so as to exceed the power XkW for one or more groups that can not satisfy the requested power XkW within the predetermined range, as described above) S114). FIG.4 (f) shows the state which group 80-3 was dismantled and each storage battery 21 of the numbers "8"-"10" became non-grouping.

  By the above processing, when the request for power adjustment is received, the selection order determination unit 123 sets a group consisting of one or more storage batteries to satisfy the request, and determines the selection order for each set group. . For example, in the example shown in FIG. 4, the selection order for each storage battery is in the order of numbers “1” to “12”, and the selection order for each group is group 80-1, group 80-2, and group 80-3. In order. In this operation example, since the storage battery to be controlled can be selected in an appropriate selection order, charging and discharging of a plurality of storage batteries can be effectively managed.

  In addition, since the selection order determination unit 123 changes the selection order as needed based on the predetermined actual measurement values related to the power adjustment for each of a plurality of unit times, the power control can be performed with high accuracy.

  In addition, when a group that does not satisfy the request is confirmed, the selection order determination unit 123 resets the group by allocating a storage battery that is not allocated to any of the groups to the group. Therefore, power control can be performed with high accuracy.

  In addition, when a group that does not satisfy the request is confirmed, the selection order determination unit 123 disassembles one of the groups and resets the group. Therefore, power control can be performed with high accuracy.

  In addition, the storage battery control unit 124 instructs each customer facility to charge / discharge the rated power of each selected storage battery. Therefore, the charge / discharge efficiency of the storage battery 21 or the storage battery 31 can be easily enhanced.

  In the operation example shown in FIG. 3, the confirmation of the control result and the reconstruction of the group based on the confirmation result are performed after one cycle of charge / discharge control of each group, but for example, the control is performed after two or more cycles. The results may be confirmed or the group may be reconstructed. Further, although the grouping is performed to exceed the requested power XkW, for example, a predetermined margin may be further provided.

  Next, another operation example of the control device 12 shown in FIG. 2 will be described with reference to FIGS. 5 and 6. FIG. 5 is a flow chart showing another operation example of the control device 12 shown in FIG. FIG. 6 is a table for explaining another operation example of the control device 12 shown in FIG. In the operation example shown in FIG. 5, when the receiving unit 122 shown in FIG. 2 receives the request for power adjustment, increase / decrease of the requested power demand (or demand energy amount) can be obtained from the plurality of storage batteries 21 or storage batteries 31. It is another example of the operation at the time of corresponding by charge and discharge. Moreover, in this operation example, the determination of the selection order by the selection order determination unit 123 is the order of the usable amount for each storage battery. The usable amount is a dischargeable capacity for the demand reduction request, and is a chargeable capacity for the demand increase request. The process shown in FIG. 5 is repeatedly performed. In the description of this operation example, only the storage battery 21 is used as an example. Further, in this operation example, it is assumed that the five storage batteries 21 shown in FIG. 6A are to be managed and the power adjustment request is made. Further, it is assumed that the request for the power adjustment received by the receiving unit 122 is a request for demand reduction (discharge) with a request time of 4 hours and a request power of 5 kW. Further, it is assumed that each storage battery 21 is not charged and discharged in the baseline.

  FIG. 6 shows an example of charge / discharge control of the five storage batteries 21 whose customer facility ID is “A” to “E” when the request for power adjustment is a request for demand reduction. FIG. 6 (a) shows available power (kW) and capacity (kWh) before charge / discharge control according to the power adjustment request is performed (that is, at the baseline). Here, the output (kW) is the maximum discharge power that can be output, and the capacity (kWh) is the remaining capacity. FIG.6 (b) shows the selection order | rank at the time of sorting the five storage batteries 21 shown to Fig.6 (a) in order with many available amounts (storage battery charging / discharging possible capacity). In FIG. 6 (b), the selection order drops from top to bottom from the top of the chart to the bottom. Moreover, FIG.6 (c) shows the estimated value of the output (kW) and capacity (kWh) of each storage battery 21 30 minutes after adjustment start.

  In the process shown in FIG. 5, when the receiving unit 122 receives a request for power adjustment from the upper control system 50 (“YES” in step S201), the storage battery control unit 124 (or the selection order determining unit 123) receives the adjustment start time. It waits until it becomes (it repeats "NO" at Step S202). When the adjustment start time is reached (“YES” in step S202), the selection order determination unit 123 acquires the storage state (remaining capacity etc.) of each storage battery 21 or storage battery 31 (step S203).

  Next, the selection order determination unit 123 sorts the storage batteries 21 shown in FIG. 6A in descending order of available capacity (capacity (kWh)) (step S204). In the example shown in FIG. 6, as shown in FIG. 6 (b), each storage battery 21 is sorted in the order of customer facility ID "E", "D", "A", "B" and "C" .

  Next, the storage battery control unit 124 selects the storage battery 21 to exceed the request power (5 kW) from the upper rank in the sort order (step S205). In this example, the storage battery control unit 124 selects the storage battery 21 of the customer facility ID “E” and the storage battery 21 of “D” shown in FIG. 6B in step S205.

  Next, the storage battery control unit 124 executes charge / discharge control of the selected storage battery 21 (step S206). In this example, the storage battery control unit 124 transmits a charge / discharge command instructing discharge at 3 kW for a predetermined unit time to the customer facility 20 of the selected first customer facility ID “E”. A charge / discharge command is sent to instruct the customer facility 20 of the second customer facility ID “D” to discharge at 2 kW for a predetermined unit time. In this operation example, the unit time is a time interval at which the storage batteries 21 are sorted again, and is an interval at which the storage battery control unit 124 transmits a charge / discharge command. The unit time is set to a time shorter than the request time. In this operation example, it is assumed that the unit time is 30 minutes.

  Next, storage battery control unit 124 determines whether or not the adjustment end time has been reached (step S207). If the adjustment end time has been reached (“YES” in step S207), the control device 12 temporarily ends the process shown in FIG. 5, and starts the process shown in FIG. 5 again. On the other hand, when the adjustment end time has not been reached (“NO” in step S207), the storage battery control unit 124 determines whether a unit time has elapsed (step S208). If the unit time has not passed ("NO" in step S208), storage battery control unit 124 determines again whether or not the adjustment end time has been reached (step S207).

  If the unit time has elapsed ("YES" in step S208), storage battery control unit 124 determines whether a predetermined time has elapsed (step S209). The predetermined time determined in step S209 corresponds to the time interval for acquiring the state of each storage battery 21 in step S203. The predetermined time is set to be longer than the unit time determined in step S208.

  If storage battery control unit 124 determines that the predetermined time has elapsed ("YES" in step S209), selection order determination unit 123 determines the storage state (remaining capacity etc.) of each storage battery 21 or storage battery 31 (a predetermined power adjustment) An example of the actual measurement value of) is acquired (step S203). And the selection order | rank determination part 123 sorts each storage battery 21 in order with many available amount (capacity (kWh)) (step S204). Thereafter, similarly to the above, the storage battery control unit 124 executes the processing after step S205.

  On the other hand, when storage battery control unit 124 determines that the predetermined time has not elapsed ("NO" in step S209), selection order determination unit 123 estimates the storage state (remaining capacity etc.) of each storage battery 21 (step S210). FIG. 6C shows an example of the estimation result. FIG. 6C is an example of the result of estimation of the state of charge after a unit time (30 minutes in this example) has elapsed from the state of charge in FIG. 6B. The capacity of the storage battery 21 of the customer facility ID “E” changes from 9 kWh to 7.5 kWh by discharging 3 kW for 30 minutes. The capacity of the storage battery 21 of the customer facility ID “D” changes from 6 kWh to 5 kWh by discharging 2 kW for 30 minutes.

  After the process of step S210, the selection order determination unit 123 sorts the storage batteries 21 in descending order of the available amount (capacity (kWh)) estimated in step S210 (step S204). Thereafter, similarly to the above, the storage battery control unit 124 executes the processing after step S205.

  By the above processing, when the request for power adjustment is received, the selection order determination unit 123 determines the selection order of each storage battery according to each storage state (available amount) in the baseline, and for each unit time The selection order is updated based on each estimated value of the state of charge (available amount). Further, based on the selection order determined by the selection order determination unit 123, the storage battery control unit 124 selects one or a plurality of storage batteries so as to satisfy the request, and performs charge / discharge control. Therefore, in this operation example, since the storage battery to be controlled can be selected in an appropriate selection order, charging and discharging of a plurality of storage batteries can be effectively managed.

  Next, another operation example of the control device 12 shown in FIG. 2 will be described with reference to FIG. FIG. 7 is a flow chart showing another operation example of the control device 12 shown in FIG. The flowchart shown in FIG. 7 is a modification of the flowchart shown in FIG. That is, the process of step S204 shown in FIG. 5 is changed to the process of step S204a shown in FIG. The processing of the other steps is identical. In the operation example shown in FIG. 6, in step S204, the selection order determination unit 123 sorts the storage batteries in descending order of available capacity (capacity (kWh)). On the other hand, in the operation example shown in FIG. 7, in step S204a, the selection order determination unit 123 sorts the storage batteries based on SOC (State Of Charge; charging rate). In step S204a, the selection order determination unit 123 sorts the SOC in descending order of SOC if the power adjustment request is a demand reduction request, and sorts in ascending SOC order if the demand increase request. As a result of this sorting, the selection order of the storage batteries located in the upper rank becomes higher. That is, in the operation example shown in FIG. 7, the determination of the selection order by the selection order determination unit 123 is in the order of SOC for each storage battery. The operations other than the process of step S204a are the same as the operation example described with reference to FIG.

  By the above process, when the request for power adjustment is received, the selection order determination unit 123 determines the selection order of each storage battery according to each storage state (charging rate) in the baseline, and stores electricity for each unit time. The selection order is updated based on each estimated value of the state (charging rate). Further, based on the selection order determined by the selection order determination unit 123, the storage battery control unit 124 selects one or a plurality of storage batteries so as to satisfy the request, and performs charge / discharge control. In this operation example, since the storage battery to be controlled can be selected in an appropriate selection order, charging and discharging of a plurality of storage batteries can be effectively managed.

  Next, with reference to FIG. 8, merits and demerits will be compared regarding how to determine the three types of selection orders described above. FIG. 8 shows the merits and demerits of the method of determining the three types of selection orders (order by count (FIG. 3), available amount (FIG. 5) and SOC (FIG. 7)). However, the content shown as a demerit is also a relative disadvantage when comparing three types, and although the amount of processing is slightly increased, it is possible to add a process that cancels the disadvantage.

  The county-by-county order has the merits of "all batteries can be used", "fair feeling is high" and "small amount of calculation", and "may not be able to keep promise (output / time) with the upper rank" and "battery There is a disadvantage that it may not be possible to use all the capacity.

  The available amount order has an advantage of "easily calculating the capacity", and has a disadvantage of "may be biased to some large capacity storage batteries" and "sort required".

  In the SOC order, there is an advantage that "the possibility of using all the storage batteries is high", and "a small capacity product may not be able to secure the necessary capacity depending on unit time" and a disadvantage that "sort calculation is necessary".

  As described above, according to the present embodiment, a plurality of storage batteries can be bundled to cope with a change in demand for power, and furthermore, storage batteries to be operated can be selected in an appropriate order. It is possible to manage charge and discharge effectively.

  The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and includes design and the like within the scope of the present invention.

1: storage battery group management system, 10: power management device, 20, 30: customer facility, 21, 31: storage battery, 12: control device, 121: power control unit, 122: reception unit, 123: selection order determination unit, 124: Storage battery control unit (control unit)

Claims (9)

An apparatus for managing charging and discharging of each storage battery in a plurality of customer facilities each having a storage battery,
A receiver for receiving a request for power adjustment at a predetermined request time from a parent aggregator;
A selection order determination unit configured to determine a selection order of each storage battery based on each storage state of the plurality of storage batteries in the baseline according to the request received by the reception unit;
One or more storage batteries are selected based on the selection order determined by the selection order determining unit every predetermined unit time shorter than the request time, and charging / discharging of each selected storage battery is performed on each of the customer facilities And a control unit for instructing The power management apparatus according to claim 1, wherein the selection order determination unit changes the selection order as needed based on predetermined measured values concerning power adjustment for each of the plurality of unit times. The power management device according to claim 1 or 2, wherein the selection order determination unit sets a group consisting of one or more storage batteries to satisfy the request, and determines the selection order for each set group. . The said selection order determination part resets said group by allocating the said storage battery which is not allocated to any of the said group to the said group, when the said group which does not satisfy the said request | requirement is confirmed. Power management equipment. 5. The power management apparatus according to claim 3, wherein, when it is confirmed that the group that does not satisfy the request is confirmed, the selection order determination unit disassembles one of the groups and resets the group. The power management device according to any one of claims 1 to 5, wherein the control unit instructs each of the customer facilities to charge and discharge the rated power of the selected storage battery. The storage state is an available amount,
The selection order determination unit determines the selection order of each storage battery according to each storage state in a baseline, and updates the selection order based on each estimated value of the storage state every unit time. The power management device according to claim 1 or 2. The state of charge is the charge rate,
The selection order determination unit determines the selection order of each storage battery according to each storage state in a baseline, and updates the selection order based on each estimated value of the storage state every unit time. The power management device according to claim 1 or 2. A method of managing charge and discharge of each storage battery in a plurality of customer facilities each having a storage battery,
The receiver receives a request for power adjustment at a predetermined request time from the parent aggregator,
In accordance with the request received by the receiving unit, the selection order determining unit determines the selection order of each of the storage batteries based on the state of charge of each of the plurality of storage batteries in the baseline.
The control unit selects one or a plurality of the storage batteries based on the selection order determined by the selection order determining unit every predetermined unit time shorter than the request time, and charges / discharges each of the selected storage batteries Power management method to direct home facilities.

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