Control device

Abstract

To provide a control device capable of increasing the amount of power resources available to a power grid during a DR implementation period.SOLUTION: A control device 100 that controls the charging and discharging of a plurality of power storage systems 1 capable of charging and discharging electricity with a power grid 90 includes: an acquisition unit 111 that acquires the intention to participate in DR from a plurality of consumers who own the plurality of power storage systems 1 when DR for adjusting the power supply and demand balance in the power grid 90 is agreed in power transactions; a resource securing unit 112 that secures power resources that can be supplied to the power grid 90 during a DR implementation period from among the power storage systems 1 of the consumers that have indicated their intention to participate; a charge / discharge plan formulation unit 113 that formulates a charge / discharge plan of adjusting the charge state of the power storage systems 1 during a pre-controllable period, and increases the power resources that can be supplied during the DR implementation period; and a communication unit 130 that transmits the formulated charge / discharge plan to the power storage system 1.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a control device for controlling charge and discharge of a plurality of charging systems.

Background Art

[0002] In recent years, research and development have been conducted on secondary batteries that contribute to energy efficiency in order to enable more people to access affordable, reliable, sustainable, and advanced energy.

[0003] In recent power systems, it is expected to utilize distributed power sources such as energy facilities like power generation equipment and storage batteries, rather than relying on large-scale centralized power sources such as power plants. Vehicles having a battery for driving are expected as one of the distributed power sources.

[0004] Patent Document 1 discloses a power transmission and reception system for transmitting power between a battery mounted on a vehicle and a power grid.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] Conventional techniques including Patent Document 1 have room for consideration in terms of devising ways to maximize the energy storage function of the battery.

[0007] The present invention provides a control device that can increase the power resources available to the power grid during the DR implementation period.

Means for Solving the Problems

[0008] The control device of the present invention A control device that controls charging and discharging of a plurality of power storage systems capable of charging and discharging power with an electric power grid, When a DR (Demand Response) for adjusting the power supply and demand balance in the electric power grid is agreed in a power transaction, an acquisition unit that acquires the intention of a plurality of consumers who own or use the plurality of power storage systems to participate in the DR; A resource securing unit that secures power resources that the power storage system can supply to the power grid during the DR implementation period from among the power storage systems of the consumers who have shown the intention to participate; A charge / discharge plan formulating unit that adjusts the charge state of the power storage system during a pre-control period that is a predetermined period before the start of the DR and formulates a charge / discharge plan to increase the power resources that can be supplied during the DR implementation period; A communication unit that transmits the charge / discharge plan formulated by the charge / discharge plan formulating unit to the power storage system.

Effect of the Invention

[0009] According to the present invention, pre-control for adjusting the charge state of the power storage system is performed before the start of the DR, so that power resources that can be supplied to the power grid during the DR implementation period can be increased.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0011] Hereinafter, a control device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0012] FIG. 1 conceptually shows the usage form of the system 5 in an embodiment. The system 5 includes a power storage system 1 respectively owned or used by a plurality of consumers 40, a power generation device 80, a control device 100, and an aggregator server 180.

[0013] Each power storage system 1 includes a vehicle 10, a gateway (GW) 20, and a charging and discharging facility 30. Each vehicle 10 includes a battery 12 which is a power storage device. The vehicle 10 is, for example, an electric vehicle or a plug - in hybrid vehicle. The battery 12 is a battery that supplies power for the running of the vehicle 10. The vehicle 10 may be a privately - owned vehicle, a vehicle used by an operator for business, a shared car, etc.

[0014] The control device 100 is connected to the aggregator server 180 through the communication network 190. The control device 100 can communicate with the charging and discharging facility 30 through the communication network 190. The control device 100 controls the charging and discharging facility 30 through the communication network 190. The control device 100 communicates with the vehicle 10 through the communication network 190 and obtains various information of the vehicle 10, including the driving history of the vehicle 10 and the SOC (State of Charge) and SOH (State of Health) of the battery 12.

[0015] The gateway 20 is provided in the residential household 42 and can communicate with the power grid 90 and the charging and discharging facility 30.

[0016] The charging and discharging facility 30 and the power generation device 80 are connected to the power grid 90. The power generation device 80 includes, for example, a power plant operated by a power company. The power generated by the power generation device 80 can be supplied to the charging and discharging facility 30 through the power grid 90. The power grid 90 is, for example, a power system.

[0017] The charging and discharging facility 30 charges and discharges the battery 12 mounted on the vehicle 10 connected thereto. The charging and discharging facility 30 is provided in the residential household 42 and charges and discharges the battery 12 of the vehicle 10 connected to the charging and discharging facility 30. When the battery 12 discharges, the power provided by the battery 12 can be consumed by the power load in the residential household 42 or provided to the power grid 90 through the power line arranged in the residential household 42. Also, the charging and discharging facility 30 can charge the battery 12 with the power received from the power grid 90.

[0018] When power is transmitted and received between the power grid 90 and the battery 12, the vehicle 10 and the charge / discharge facility 30 charge and discharge the battery 12 according to the control of the control device 100. For example, when a power shortage occurs in the power grid 90, the control device 100 can transmit power from the battery 12 to the power grid 90 by instructing the vehicle 10 and the charge / discharge facility 30 to discharge the battery 12 via the gateway 20. When a power surplus occurs in the power grid 90, the control device 100 can reduce the power surplus of the power grid 90 by instructing the vehicle 10 and the charge / discharge facility 30 to charge the battery 12 via the gateway 20. In this way, the control device 100 can aggregate the plurality of batteries 12 mounted on the plurality of vehicles 10 and provide a power resource for the power grid 90.

[0019] The aggregator server 180 is, for example, a server used by a power aggregator. The aggregator server 180 conducts power transactions in the power market and the like. The control device 100 communicates with the aggregator server 180 to provide a required amount of power from the battery 12 to the power grid 90 or to receive power (i.e., charge) from the power grid 90 to the battery 12. For example, the control device 100 controls the vehicle 10 and the charge / discharge facility 30 to discharge the battery 12 in response to a request from the aggregator server 180, and provides the power grid 90 with the amount of power corresponding to the request. Further, the control device 100 may control the vehicle 10 and the charge / discharge facility 30 to charge the battery 12 in response to a request from the aggregator server 180, and receive the amount of power corresponding to the request from the power grid 90. In this way, as the vehicle 10 equipped with the battery 12, it is possible to control the amount of electric power in an appropriate form by charging or discharging.

[0020] FIG. 2 is a block diagram of the control device 100 and a diagram showing the relationship between the control device 100 and other devices. The control device 100 is a device that controls the charging and discharging of a plurality of power storage systems 1 capable of charging and discharging power with the power grid 90.

[0021] The relationship between the control device 100 and other devices will be described. (1) The vehicle 10 transmits vehicle information including driving history, SOC, etc. to the control device 100. (2) The consumer 40 operates a predetermined application on the mobile terminal 50 to input the DR participation availability regarding whether to participate in DR (Demand Response) for adjusting the power supply and demand balance in the power grid 90, the incoming and outgoing plan regarding the schedule of the vehicle 10's incoming and outgoing, etc. The mobile terminal 50 transmits the input DR participation availability, incoming and outgoing plan, etc. to the control device 100.

[0022] (3) The control device 100 transmits the created charge and discharge plan to the gateway 20. (4) The gateway 20 gives a charge and discharge instruction to the charge and discharge facility 30. The creation of the charge and discharge plan by the control device 100 will be described later.

[0023] The control device 100 includes a processing unit 110, a storage unit 120, and a communication unit 130. The processing unit 110 is realized by an arithmetic processing device including a processor and is responsible for the main processing of the control device 100. The processing unit 110 may be realized by a microcomputer including a CPU, ROM, RAM, I / O, and a bus, etc. The control device 100 may be realized by a computer. The storage unit 120 is realized by including, for example, a non-volatile storage medium and stores various data, programs, etc. The processing unit 110 reads, for example, a program stored in the storage unit 120 and performs predetermined processing. The communication unit 130 realizes communication with external devices.

[0024] The processing unit 110 includes an acquisition unit 111, a resource securing unit 112, and a charge and discharge plan determination unit 113. The acquisition unit 111 acquires the intention to participate in DR, that is, the DR participation availability in (2), from a plurality of consumers 40 who own or use a plurality of power storage systems 1 when the aggregator server 180 used by the power aggregator concludes an agreement on DR in the power transaction.

[0025] The resource securing unit 112 secures the power resources that the power storage system 1 can supply to the power grid 90 during the DR implementation period from among the power storage systems 1 of the customers 40 who have indicated their willingness to participate. Here, the available power resources refer to a concept that includes both charging and discharging of the battery 12. Also, in the case of negative watt trading, the available power resources include those that do not participate in power trading such as the suspension of the planned charging of the battery 12.

[0026] DR includes up-DR and down-DR. During the implementation period of up-DR, the charge amount of the battery 12 is increased, or the planned discharge of the battery 12 is stopped to reduce the discharge amount. Also, during the implementation period of down-DR, the discharge amount of the battery 12 is increased, or the planned charging of the battery 12 is stopped to reduce the charge amount. During the implementation periods of up-DR and down-DR, these four types of controls can be performed on the battery 12 and are controlled according to various situations. The details of up-DR and down-DR will be described later.

[0027] The charge / discharge plan formulating unit 113 adjusts the charge state of the power storage system 1 during the pre-control period, which is a predetermined period before the start of DR, and formulates a charge / discharge plan to increase the available power resources during the DR implementation period. The charge / discharge plan formulating unit 113 increases the power resources secured by the resource securing unit 112. The pre-control period will be described later.

[0028] The communication unit 130 transmits the charge / discharge plan formulated by the charge / discharge plan formulating unit 113 to the power storage system 1 as shown in (3).

[0029] FIG. 3 is a timing chart of a plan for the control device 100 to discharge the battery 12 during the pre - controllable period before the start of the upward DR. FIG. 3(a) shows the predicted power demand in the power grid 90, FIG. 3(b) shows the SOC of the battery 12, and FIG. 3(c) shows the required power [kW] of the power storage system 1. In FIG. 3, it is assumed that on the day before the DR implementation date, as a pre - preparation for DR, from the DR bidding to the conclusion is carried out. The same applies to FIGS. 4 to 6 which will be described later. Also, the pre - controllable period in this example is the period from the conclusion of DR to the start of DR during which pre - preparation for DR is possible. The same applies to FIGS. 4 to 6.

[0030] The power aggregator starts power trading in the power trading market etc. on the day before the DR implementation date and bids during the bid acceptance period. After the conclusion process, the conclusion result is notified. After the conclusion, the acquisition unit 111 acquires the intention of a plurality of consumers 40 to participate in the DR, that is, the DR participation availability in (2). Then, the charge - discharge plan formulation unit 113 formulates a charge - discharge plan for the power storage system 1 of the consumers 40 who have expressed the intention to participate.

[0031] The control device 100 performs pre - control to adjust the SOC of the battery 12 before the start of DR according to the charge - discharge plan formulated by the charge - discharge plan formulation unit 113. Thereby, the power resources available for supply to the power grid 90 during the DR implementation period can be increased. The following will be described in detail with reference to FIGS. 3 to 6.

[0032] FIG. 3(a) shows that the more the power demand increases, the more the power is in short supply, and the power trading price, electricity tariff, etc. become high. Conversely, the less the power demand, the more the power is surplus, and the power trading price, electricity tariff, etc. become low. The same applies to FIGS. 4 to 6 which will be described later. As shown in FIG. 3(a), since the occurrence of power surplus in the power grid 90 is predicted on the DR implementation date, the upward DR that requests an increase in power demand to the power storage system 1 is implemented.

[0033] (b) and (c) of FIG. 3 specifically show the SOC and the required power of the charge / discharge plan (solid line) of the power storage system 1 of a certain consumer 40 formulated by the charge / discharge plan formulation unit 113. The dashed lines in the figure indicate the SOC and the required power assumed based on the inventory plan in the case where there is no upward DR.

[0034] In this example, the vehicle 10 has been in storage since the previous day. The charge / discharge plan formulation unit 113 adjusts the SOC of the battery 12 of the power storage system 1 during the pre-control period immediately before the activation of the upward DR command. Specifically, the charge / discharge plan formulation unit 113 formulates a plan to discharge the battery 12. At this time, since power is provided to the power grid 90, the required power of the power storage system 1 becomes negative. The charge / discharge plan formulation unit 113 formulates a plan to charge the battery 12 during the implementation period of the upward DR. At this time, since the battery 12 is charged with the power received from the power grid 90, the required power of the power storage system 1 becomes positive, and it is possible to cope with the power surplus in the power grid 90.

[0035] As in this example, when the DR is an upward DR that requests an increase in power demand, by discharging the power storage system 1 before the implementation of the upward DR and charging the amount discharged before the implementation of the upward DR during the implementation period of the upward DR, the power resource that can be supplied to the power grid 90 during the implementation period of the upward DR can be increased. The available power resource here refers to increasing the chargeable potential of the battery 12 during the implementation period of the upward DR.

[0036] FIG. 4 is a timing chart of the plan for the control device 100 to stop charging the battery 12 during the pre-control period before the start of the upward DR. (a) of FIG. 4 shows the predicted power demand in the power grid 90, and (b) and (c) of FIG. 4 specifically show the SOC and the required power of the charge / discharge plan (solid line) of the power storage system 1 of a certain consumer 40 formulated by the charge / discharge plan formulation unit 113, respectively.

[0037] In this example, the battery 12 is charged immediately after the vehicle 10 is parked. The charge / discharge planning unit 113 adjusts the SOC of the battery 12 of the power storage system 1 during the pre - controllable period immediately before the activation of the upward DR command. Specifically, the charge / discharge planning unit 113 formulates a plan to stop charging the battery 12. At this time, the power demand of the power storage system 1 becomes zero. As shown by the dashed line, if the charging of the battery 12 is not stopped, there is a possibility that the SOC of the battery 12 reaches a sufficient level during the pre - controllable period and no further charging can be performed during the upward DR implementation period. In this example, since the charging of the battery 12 is stopped during the pre - controllable period, by charging during the upward DR implementation period the amount that was not charged before the upward DR implementation, the power resource that can be supplied to the power grid 90 during the upward DR implementation period can be increased. Note that the power resource that can be supplied here is a concept that includes both the charging and discharging of the battery 12, and it increases the charging potential of the battery 12 during the upward DR implementation period.

[0038] The charging stop (Fig. 4) or discharging (Fig. 3) of the power storage system 1 during the pre - controllable period is preferably executed when power shortage occurs in the power grid 90 during the pre - controllable period, as shown in Fig. 3(a) and Fig. 4(a). Thereby, it is possible to contribute to the charging stop or discharging of the power storage system 1 against the power shortage during the pre - controllable period.

[0039] Fig. 5 is a timing chart (part 1) of the plan for the control device 100 to charge the battery 12 during the pre - controllable period before the start of the downward DR. Fig. 5(a) shows the predicted power demand in the power grid 90, Fig. 5(b) shows the SOC of the battery 12, and Fig. 5(c) shows the power demand of the power storage system 1. As shown in Fig. 5(a), since a power shortage in the power grid 90 is predicted on the DR implementation day, a downward DR requesting suppression of the power demand is implemented for the power storage system 1.

[0040] (b) and (c) of FIG. 5 specifically show the charge-discharge plan (solid line) of the power storage system 1 of a certain consumer 40 formulated by the charge-discharge plan formulation unit 113. The dashed lines in the figure indicate the SOC and the required power assumed based on the inventory plan in the case where there is no downward DR.

[0041] In this example, the vehicle 10 has been in stock since the previous day. The charge-discharge plan formulation unit 113 adjusts the SOC of the battery 12 of the power storage system 1 immediately before the activation of the downward DR command during the pre-control available period. Specifically, the charge-discharge plan formulation unit 113 formulates a plan to charge the battery 12. At this time, since the battery 12 is charged with the power received from the power grid 90, the required power of the power storage system 1 becomes positive. The charge-discharge plan formulation unit 113 formulates a plan to discharge the battery 12 during the implementation period of the downward DR. At this time, since power is provided to the power grid 90, the required power of the power storage system 1 becomes negative, and it is possible to respond to the power shortage in the power grid 90.

[0042] As shown by the dashed line, if the battery 12 is not charged during the pre-control available period, there may be a possibility that discharge cannot be performed during the implementation period of the downward DR. In this example, since the battery 12 is charged during the pre-control available period, it is possible to store in advance in the battery 12 the power sufficient for discharging during the implementation period of the downward DR, and it is possible to increase the power resource that can be supplied to the power grid 90 during the implementation period of the downward DR. Here, the available power resource refers to increasing the discharge potential of the battery 12 during the implementation period of the downward DR.

[0043] FIG. 6 is a timing chart (part 2) of the plan for the control device 100 to charge the power storage system 1 during the pre-control available period before the start of the downward DR. (a) shows the predicted power demand in the power grid 90, (b) shows the SOC of the battery 12 of the power storage system 1, and (c) shows the required power of the power storage system 1.

[0044] Also in this example, the charge / discharge plan determination unit 113 adjusts the SOC of the battery 12 of the power storage system 1 during the pre-control period immediately before the activation of the reduction DR command. Specifically, the charge / discharge plan determination unit 113 formulates a plan to charge the battery 12. At this time, since the battery 12 is charged with the power received from the power grid 90, the demand power of the power storage system 1 becomes positive.

[0045] The broken line in the figure indicates the SOC and demand power assumed based on the inventory plan in the case where there is no reduction DR. Before formulating the charge / discharge plan, it is expected that the battery 12 will be charged during the reduction DR implementation period. In the example of FIG. 5, the charge / discharge plan determination unit 113 formulated a plan to discharge the battery 12 during the reduction DR implementation period. However, as shown in FIG. 6(b), a plan not to discharge the battery 12 during the reduction DR implementation period may also be formulated. Although a plan not to discharge the battery 12 during the reduction DR implementation period is formulated, initially it was expected that the battery 12 would be charged during the reduction DR implementation period as indicated by the broken line and the demand power would increase. Therefore, compared with before formulating the charge / discharge plan, the demand power during the reduction DR implementation period is reduced, and it is possible to cope with the power shortage in the power grid 90.

[0046] In this way, by charging the battery 12 before the reduction DR is implemented and reducing the amount of charging during the reduction DR implementation period, it is possible to increase the power resources that can be supplied to the power grid 90 during the reduction DR implementation period. Note that the available power resources referred to here increase the discharge potential of the battery 12 during the reduction DR implementation period.

[0047] Charging of the battery 12 during the pre-control period is preferably executed when there is surplus power in the power grid 90 during the pre-control period, as shown in FIGS. 5(a) and 6(a). Thereby, the surplus power during the pre-control period can be effectively utilized.

[0048] FIG. 7 is a flowchart showing the charge / discharge control procedure of the power storage system 1 executed by the control device 100. The control device 100 acquires demand power data as shown in FIGS. 3(a) to 6(a) (step S1), and also acquires electricity charge data (step S2). Further, the control device 100 acquires power trading price data (step S3).

[0049] The control device 100 determines whether the next DR scheduled to be executed next is a down DR or an up DR from the information of the aggregator server 180 (step S4). When it is determined that the next DR is a down DR, the control device 100 determines whether there is surplus power in the power grid 90 during the pre-control period (step S5). When there is surplus power during the pre-control period (step S5; YES), the control device 100 executes DR pre-control and charges the battery 12 before the down DR (step S6).

[0050] On the other hand, when it is determined that there is no surplus power in the power grid 90 during the pre-control period (step S5; NO), the control device 100 determines whether the power trading price is a low price (step S7). When the power trading price is a low price (step S7; YES), the control device 100 further determines whether the electricity charge is a low price (step S8). When the electricity charge is also a low price (step S8; YES), since charging the battery 12 is possible at low cost, the control device 100 executes DR pre-control and charges the battery 12 before the down DR (step S6).

[0051] When it is determined in step S7 that the power trading price is not a low price (step S7; NO), or when it is determined that the electricity charge is not a low price (step S8; NO), since charging the battery 12 becomes high cost, the control device 100 does not execute DR pre-control (charging) (step S9).

[0052] On the other hand, when it is determined in step S4 that the next DR is an increase DR, the control device 100 determines whether there is a demand power in the power grid 90 (step S10). When there is a demand power (step S10; YES), that is, when there is no surplus power, the control device 100 determines whether the electricity price is low (step S11). When the electricity price is not low (step S11; NO), since the power can be sold at a high price, the control device 100 executes DR pre-control and discharges the battery 12 before the increase DR (step S12).

[0053] When there is no demand power in step S10 (step S10; NO), or when the electricity price is low (step S11; YES), since there is surplus power or the sale of power will result in a low price, the control device 100 does not execute DR pre-control (discharge) (step S13).

[0054] In the examples of FIGS. 3 to 6, the pre-control available period is the period from the DR agreement to the start of DR. However, the pre-control available period may be the period from the DR bid to the start of DR. Thereby, since the pre-control available period can be set from after the DR bid or agreement, a sufficient pre-control available period can be ensured.

[0055] Also, in the period immediately before the start of DR (for example, 2 hours before the start of DR), it may be determined that there is a deviation between the power resources secured by the resource securing unit 112 and the power demand requested by the DR. For example, in the case of an increase DR (FIGS. 3 and 4), the power storage system 1 for charging is insufficient, and in the case of a decrease DR (FIGS. 5 and 6), the power storage system 1 for discharging is insufficient. In this case, the charge / discharge plan formulation unit 113 can adjust the SOC of the battery 12 in the period immediately before the start of DR and formulate a charge / discharge plan to increase the power resources that can be supplied during the DR implementation period.

[0056] Accordingly, for example, when it is determined immediately before the start of DR that sufficient power resources cannot be secured depending on the usage status of the power storage system 1 by a customer, it is possible to suppress the occurrence of a shortage of power resources during the DR implementation period.

[0057] As described above, one embodiment has been described with reference to the drawings. Needless to say, the present invention is not limited to such an example. It is obvious that those skilled in the art can conceive of various modification examples or correction examples within the scope described in the claims, and it is naturally understood that they also belong to the technical scope of the present invention. Further, within the scope not departing from the gist of the invention, the components in the above embodiment may be arbitrarily combined.

[0058] For example, the power transaction may be in a form carried out through the power transaction market as described above, or may be in a form of directly conducting a bilateral transaction with the power company as a schedule coordinator or aggregator.

[0059] At least the following matters are described in this specification. Although the corresponding components etc. in the above-described embodiment are shown in parentheses, the present invention is not limited thereto.

[0060] (1) A control device (control device 100) that controls the charging and discharging of a plurality of power storage systems (power storage system 1) capable of charging and discharging power with a power grid (power grid 90), When a DR (Demand Response) for adjusting the power supply and demand balance in the power grid is agreed in a power transaction, an acquisition unit (acquisition unit 111) that acquires the intention of a plurality of customers who own or use the plurality of power storage systems to participate in the DR; A resource securing unit (resource securing unit 112) that secures power resources that the power storage system can supply to the power grid during the DR implementation period from among the power storage systems of the customers who have shown the intention to participate; Adjust the state of charge (SOC of the battery 12) of the power storage system during a pre - controllable period, which is a predetermined period before the start of the DR, and formulate a charge - discharge plan to increase the power resources that can be supplied during the DR implementation period. A charge - discharge plan formulation unit (charge - discharge plan formulation unit 113). A communication unit (communication unit 130) that transmits the charge - discharge plan formulated by the charge - discharge plan formulation unit to the power storage system. The control device is provided with: A control device.

[0061] According to (1), since pre - control is performed to adjust the state of charge of the power storage system before the start of the DR, the power resources that can be supplied to the power grid during the DR implementation period can be increased.

[0062] (2) The control device according to (1), The DR is an up - DR that requests an increase in power demand, The charge - discharge plan includes a plan to stop charging the power storage system during the pre - controllable period or a plan to discharge the power storage system during the pre - controllable period. A control device.

[0063] According to (2), by stopping charging or discharging the power storage system before the implementation of the up - DR and charging during the up - DR implementation period the amount that was discharged or not charged before the up - DR implementation, the power resources that can be supplied to the power grid during the up - DR implementation period can be increased.

[0064] (3) The control device according to (2), The stop of charging or discharge of the power storage system during the pre - controllable period is executed when power shortage occurs in the power grid during the pre - controllable period. A control device.

[0065] According to (3), it is possible to contribute to the stop of charging or discharge of the power storage system in response to power shortage during the pre - controllable period.

[0066] (4) The control device according to (1), The DR is a downward DR that requests suppression of power demand. The charge-discharge plan includes a plan to charge the power storage system during the pre-control period. Control device.

[0067] According to (4), by charging the power storage system before the implementation of the downward DR and discharging during the implementation period of the downward DR or reducing the amount of charging during the implementation period of the downward DR, the power resource that can be supplied to the power grid during the implementation period of the downward DR can be increased.

[0068] (5) The control device according to (4), The charging of the power storage system during the pre-control period is executed when there is surplus power in the power grid during the pre-control period. Control device.

[0069] According to (5), surplus power during the pre-control period can be effectively utilized.

[0070] (6) The control device according to any one of (1) to (5), The pre-control period is the period from the bid of the DR to the start of the DR, or the period from the agreement of the DR to the start of the DR. Control device.

[0071] According to (6), since the period from after the bid or agreement of the DR can be set as the pre-control period, a sufficient pre-control period can be ensured.

[0072] (7) The control device according to any one of (1) to (6), When it is determined that there is a deviation between the power resource secured by the resource securing unit in the period immediately before the start of the DR and the power demand requested by the DR, the charge-discharge plan formulation unit adjusts the charge state of the power storage system in the period immediately before the start of the DR and formulates the charge-discharge plan to increase the power resource that can be supplied during the implementation period of the DR. Control device.

[0073] (7) According to, for example, when it is determined immediately before the start of DR that power resources cannot be sufficiently secured depending on the usage status of the power storage system by the customer, it is possible to suppress the occurrence of a shortage of power resources during the DR implementation period.

Explanation of symbols

[0074] 1 Power storage system 90 Power grid 100 Control device 111 Acquisition unit 112 Resource securing unit 113 Charge / discharge plan formulation unit 130 Communication unit

Claims

1. A control device for controlling charging and discharging of a plurality of power storage systems capable of charging and discharging power with a power grid, comprising: an acquisition unit that acquires the intention of a plurality of consumers who own or use the plurality of power storage systems to participate in DR (Demand Response) when DR (Demand Response) for adjusting the power supply-demand balance in the power grid is agreed in a power transaction; a resource securing unit that secures power resources that the power storage system can supply to the power grid during the implementation period of the DR from among the power storage systems of the consumers who have shown the intention to participate; a charge and discharge plan formulation unit that formulates a charge and discharge plan for adjusting the charge state of the power storage system during a predetermined period before the start of the DR, which is a pre-controllable period, and increasing the power resources that can be supplied during the implementation period of the DR; a communication unit that transmits the charge and discharge plan formulated by the charge and discharge plan formulation unit to the power storage system. A control device.

2. The control device according to claim 1, wherein the DR is an up-DR that requests an increase in power demand, and the charge and discharge plan includes a plan to stop charging the power storage system during the pre-controllable period or a plan to discharge the power storage system during the pre-controllable period. A control device.

3. The control device according to claim 2, wherein the stop of charging or discharging of the power storage system during the pre-controllable period is executed when power shortage occurs in the power grid during the pre-controllable period. A control device.

4. The control device according to claim 1, wherein the DR is a down-DR that requests suppression of power demand, and the charge and discharge plan includes a plan to charge the power storage system during the pre-controllable period. A control device.

5. The control device according to claim 4, wherein the charging of the power storage system during the pre-controllable period is executed when there is surplus power in the power grid during the pre-controllable period. A control device.

6. The control device according to any one of claims 1 to 5, wherein the pre-controllable period is a period from the bidding of the DR to the start of the DR or a period from the agreement of the DR to the start of the DR. A control device.

7. The control device according to any one of claims 1 to 5, wherein When it is determined that there is a deviation between the power resource secured by the resource securing unit in the period immediately before the start of the DR and the power demand requested by the DR, the charge / discharge plan formulating unit adjusts the charge state of the power storage system in the period immediately before the start of the DR and formulates the charge / discharge plan for increasing the power resource that can be supplied during the DR implementation period. Control device.

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