Power management device and power management method

Abstract

To provide a power management device and a power management method that, when assuming a power storage device that autonomously executes specific control prepared in case of power outage occurring with a natural disaster, can appropriately execute VPP control.SOLUTION: A power management device comprises: a receiving unit that receives, from each of two or more power storage devices connected to an electric power system, dealing information related to a function to autonomously execute specific control of executing charging of the power storage device before power outage of the electric power system; and a control unit that, based on the dealing information, executes charge control or discharge control of each of the two or more power storage devices as power supply and demand adjustment control related to the electric power system.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a power management apparatus and a power management method. [Background technology]

[0002] In recent years, business continuity plans (BCPs) for continuing business activities even in the event of a natural disaster or other event have become known. From the perspective of electricity, specific control has been proposed for charging a power storage device before a power outage occurs due to a natural disaster. The specific control is assumed not only for business activities such as those of companies, but also for non-business activities such as those of ordinary individuals (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-207782 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, a technology (e.g., a Virtual Power Plant (VPP)) using a power storage device is envisioned to maintain the balance between power supply and demand in a power grid. On the other hand, a power storage device that autonomously executes the above-mentioned specific control is also envisioned.

[0005] In considering such a case, if the energy storage devices used in the VPP include energy storage devices that autonomously execute specific control, there is a possibility that charging of the energy storage devices will be performed autonomously, and therefore it may not be possible to execute VPP control appropriately.

[0006] Therefore, the present invention has been made to solve the above-mentioned problems, and aims to provide a power management device and a power management method that enable appropriate execution of VPP control when assuming a power storage device that autonomously executes specific control in preparation for power outages caused by natural disasters. [Means for solving the problem]

[0007] One aspect of the disclosure is a power management device that includes a receiving unit that receives response information from each of two or more storage devices connected to a power system regarding a function of autonomously executing specific control to charge the storage device before a power outage in the power system, and a control unit that executes charging control or discharging control of each of the two or more storage devices as power supply and demand adjustment control for the power system based on the response information.

[0008] One aspect of the disclosure is a power management method comprising the steps of receiving response information from each of two or more power storage devices connected to a power system regarding a function of autonomously executing specific control for charging the power storage device before a power outage in the power system, and executing charging control or discharging control of each of the two or more power storage devices as power supply and demand adjustment control for the power system based on the response information. Effect of the Invention

[0009] According to the present invention, it is possible to provide a power management device and a power management method that enable appropriate execution of VPP control in the case of a power storage device that autonomously executes specific control in preparation for a power outage caused by a natural disaster. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram showing a power management system 1 according to an embodiment. [Diagram 2] FIG. 2 is a diagram showing a facility 100 according to the embodiment. [Diagram 3] FIG. 3 is a diagram showing the upper management server 300 according to the embodiment. [Figure 4]FIG. 4 is a diagram showing the lower level management server 200 according to the embodiment. [Diagram 5] FIG. 5 is a diagram showing the EMS 160 according to the embodiment. [Figure 6] FIG. 6 is a diagram illustrating a power management method according to an embodiment. [Figure 7] FIG. 7 is a diagram illustrating a power management method according to an embodiment. [Figure 8] FIG. 8 is a diagram illustrating a power management method according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, the embodiments will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic.

[0012] [Embodiment] (Power Management System) A power management system according to an embodiment will be described below. The power management system may be simply referred to as a power system.

[0013] 1, the power management system 1 includes a facility 100. The power management system 1 includes a lower management server 200, a higher management server 300, a third-party server 400, and an external server 500.

[0014] Here, the facility 100, the lower management server 200, the upper management server 300, the third-party server 400, and the external server 500 are configured to be able to communicate with each other via a network 11. The network 11 may include the Internet, a dedicated line such as a VPN (Virtual Private Network), or a mobile communication network.

[0015] The facility 100 is connected to the power system 12 and may receive power from the power system 12 or may supply power to the power system 12. Power from the power system 12 to the facility 100 may be referred to as forward flow power. Power from the facility 100 to the power system 12 may be referred to as reverse flow power. In FIG. 1, facilities 100A to 100C are illustrated as examples of the facility 100.

[0016] Although not particularly limited, the facility 100 may be a facility such as a residence, a facility such as a store, or a facility such as an office. The facility 100 may be an apartment building including two or more residences. The facility 100 may be a complex including at least two or more facilities of residences, stores, and offices. Details of the facility 100 will be described later (see FIG. 2). Note that a user who owns or manages the facility 100 may also be referred to as the facility 100.

[0017] The lower level management server 200 is managed by a business operator that manages the power related to the power system 12 or the facilities 100. The business operator may be a resource aggregator (RA). One or more facilities 100 managed by the lower level management server 200 may be referred to as a facility group 100.

[0018] In the following, a case will be illustrated in which the lower level management server 200 is managed by an RA. The lower level management server 200 may be referred to as an RA, and the RA may be referred to as the lower level management server 200. Details of the lower level management server 200 will be described later (see FIG. 4).

[0019] The upper management server 300 is managed by a business operator that manages power related to the power system 12. The upper management server 300 may also be managed by a business operator that provides various services. The upper management server 300 may be referred to as an AEMS (Area Energy Management System) or an AC (Aggregation Controller). Details of the upper management server 300 will be described later (see FIG. 3).

[0020] The business operator may be a retail electricity business operator. The retail electricity business operator may include a local power business operator (general electric utility) that manages infrastructure such as the power grid 12, or may include a new power business operator other than the local power business operator. The new power business operator may be expected to sell power to the facility by procuring power from the power market. The power market may include a wholesale power market related to the trading of power (procured power) supplied to the facility 100, may include a power adjustment market related to the adjustment of the power supply and demand gap after the gate of the wholesale power market is closed, or may include a capacity market related to the trading of supply capacity (e.g., reverse flow power). The power market may include trading of power with other retail electricity business operators. The power market may include trading of power with other power generation business operators. In other words, the power market may be an exchange for trading of power, regardless of the form of one-to-one, one-to-other, or many-to-many.

[0021] The service may include a service for suppressing a difference (imbalance) between a planned value for the forward flow power (hereinafter also referred to as procured power) of the group of facilities 100 and an actual value for the procured power of the group of facilities 100 to a predetermined difference or less. The service may include a service for suppressing a difference (imbalance) between a planned value for the reverse flow power (hereinafter also referred to as generated power) of the group of facilities 100 and an actual value for the generated power of the group of facilities 100 to a predetermined difference or less.

[0022] Third party server 400 is managed by a business entity that manages the balance of power supply and demand in power system 12. The business entity may manage the power market related to power system 12. For example, third party server 400 may have a function to check an imbalance in procured power. Third party server 400 may have a function to check an imbalance in generated power. For example, the third party server may perform the following operations.

[0023] First, the third-party server 400 may check whether the difference (imbalance) between the planned value for the procured power and the actual value for the procured power exceeds a predetermined difference. The planned value and the actual value may be aggregated for each unit period (e.g., 30 minutes), and the imbalance may be checked for each unit period (e.g., 30 minutes). If the imbalance exceeds the predetermined difference, the third-party server 400 may impose a penalty on the business entity managing the upper management server 300. If the imbalance does not exceed the predetermined difference, the third-party server 400 may provide an incentive to the business entity managing the upper management server 300. The penalty and incentive may be monetary.

[0024] Secondly, the third-party server 400 may check whether the difference (imbalance) between the planned value for the generated power and the actual value of the generated power exceeds a predetermined difference. The planned value and the actual value may be aggregated for each unit period (e.g., 30 minutes), and the imbalance may be checked for each unit period (e.g., 30 minutes). If the imbalance exceeds the predetermined difference, the third-party server 400 may impose a penalty on the business entity managing the upper management server 300. If the imbalance does not exceed the predetermined difference, the third-party server 400 may provide an incentive to the business entity managing the upper management server 300. The penalty and incentive may be monetary.

[0025] Here, the period during which an imbalance between generated power and procured power is confirmed may be defined as the target period (e.g., one day). In such a case, the planned value for procured power may include a plan formulated at a time before the target period (e.g., 12:00 on the day before the target period). The planned value for generated power may include a planned value formulated at a time before the target period (e.g., 12:00 on the day before the target period). Furthermore, the planned value for procured power may include a planned value formulated at a time before a unit period included in the target period (e.g., one hour before the unit period). The planned value for generated power may include a planned value formulated at a time before a unit period included in the target period (e.g., one hour before the unit period).

[0026] Although not particularly limited, the planned value regarding the procurement power and the actual value regarding the procurement power may be reported from the lower management server 200 or the upper management server 300. The planned value regarding the generated power and the actual value regarding the generated power may be reported from the lower management server 200 or the upper management server 300.

[0027] The external server 500 may include a server that manages information related to natural disasters (hereinafter, disaster information). The natural disaster may include a disaster that affects a power outage in the power grid 12. The disaster that affects a power outage in the power grid 12 may include a secondary disaster (such as a fire) of the natural disaster.

[0028] First, the disaster information may include information indicating the level of a natural disaster (hereinafter, warning level) for each type of disaster, such as heavy rain, heavy snow, windstorm, blizzard, high waves, storm surge, etc. The types of warning levels may include emergency warning, warning, advisory, etc.

[0029] Here, the natural disasters with special warnings, the natural disasters with warnings, and the natural disasters with advisories may be different from each other. The natural disasters with special warnings may include heavy rain, heavy snow, windstorms, snowstorms, ocean waves, and high tides. The natural disasters with warnings may include heavy rain, floods, heavy snow, windstorms, snowstorms, ocean waves, and high tides. The natural disasters with advisories may include heavy rain, floods, heavy snow, strong winds, snowstorms, ocean waves, high tides, lightning, dense fog, dryness, avalanches, icing, snow, melting snow, frost, and low temperatures.

[0030] Second, the disaster information may include information about earthquakes. The information about earthquakes may include information indicating the epicenter and information indicating the scale of the earthquake.

[0031] Third, the disaster information may include information about a tsunami. The information about the tsunami may include information indicating the arrival time of the tsunami in each region and information indicating the height of the tsunami in each region.

[0032] Fourth, the disaster information may include information about typhoons. The information about typhoons may include information indicating the predicted wind path and information indicating the scale of the typhoon (central pressure, central wind speed, storm area, strong wind area, etc.).

[0033] In the embodiment, a service for adjusting and controlling power supply and demand for the power grid 12 (hereinafter, a VPP (Virtual Power Plant) service) will be described using distributed power sources installed in the facility 100. The AC may be considered as a business that bundles the amount of power controlled by the RA and directly trades power with a general power transmission and distribution business operator or a retail electricity business operator. The RA may be considered as a business that directly concludes a contract for the VPP service with the facility 100 (consumer) and controls resources.

[0034] Although not particularly limited, the power supply and demand adjustment control may include control to adjust the power supply and demand balance of the power grid 12. The power supply and demand adjustment control may include control to adjust an imbalance regarding procured power, control to adjust an imbalance regarding generated power, and the like.

[0035] Here, the entity that transmits control commands to the distributed power sources installed in the facility 100 may be referred to as a VPP controller. In the case where the lower management server 200 has a VPP service cooperation function, the lower management server 200 and an EMS 160 described later may constitute a VPP controller. In such a case, the lower management server 200 may include a first server that functions as an RA and a second server that has a VPP service cooperation function. The first server and the second server may be separate servers or may be integrated into one server.

[0036] In the embodiment, the VPP controller is an example of a power management device. The upper management server 300 is an example of an upper node.

[0037] (facility) A facility according to an embodiment will be described below. As shown in Fig. 2, the facility 100 includes a solar cell device 110, a power storage device 120, a fuel cell device 130, a load device 140, and an EMS (Energy Management System) 160. The facility 100 may also include a measuring device 190.

[0038] The solar cell device 110 is a distributed power source that generates power in response to light such as sunlight. For example, the solar cell device 110 is configured with a PCS (Power Conditioning System) and a solar panel. Here, installation may mean that the solar cell device 110 and the power grid 12 are connected.

[0039] The power storage device 120 is a distributed power source that charges and discharges power. For example, the power storage device 120 is configured by a PCS and a power storage cell. Here, "installed" may mean that the power storage device 120 is connected to the power system 12. In the following, the power storage device 120 is an example of a distributed power source used for power supply and demand adjustment control related to the power system 12. The power storage device 120 may be considered to be an example of a distributed power source used for VPP control.

[0040] The fuel cell device 130 is a distributed power source that generates power using fuel. For example, the fuel cell device 130 is composed of a PCS and a fuel cell. Here, "installation" may mean that the fuel cell device 130 and the power system 12 are connected.

[0041] For example, the fuel cell device 130 may be a solid oxide fuel cell (SOFC; Solid Oxide Fuel Cell), a polymer electrolyte fuel cell (PEFC; Polymer Electrolyte Fuel Cell), a phosphoric acid fuel cell (PAFC; Phosphoric Acid Fuel Cell), or a molten carbonate fuel cell (MCFC; Molten Carbonate Fuel Cell). The load device 140 is a device that consumes electric power. For example, the load device 140 may include an air conditioner, a heat pump water heater, a lighting device, and the like.

[0042] The EMS 160 manages the power related to the facility 100. The EMS 160 may control the solar cell device 110, the power storage device 120, the fuel cell device 130, and the load device 140. In the embodiment, the EMS 160 is illustrated as an apparatus that receives a control command from the lower management server 200, but such an apparatus may be referred to as a Gateway or simply as a control unit. The EMS 160 may be referred to as a Local EMS (LEMS) or a Home EMS (HEMS) to distinguish it from the lower management server 200. Details of the EMS 160 will be described later (see FIG. 5).

[0043] The measuring device 190 measures forward flow power (hereinafter also referred to as demand power) from the power system 12 to the facility 100. The measuring device 190 may measure reverse flow power from the facility 100 to the power system 12. For example, the measuring device 190 may be a smart meter belonging to a power company. The measuring device 190 may transmit an information element indicating a measurement result (an integrated value of forward flow power or reverse flow power) in a first interval (e.g., 30 minutes) to the EMS 160 at the first interval. The measuring device 190 may transmit an information element indicating a measurement result in a second interval (e.g., 1 minute) shorter than the first interval to the EMS 160.

[0044] (upper management server) The upper management server according to the embodiment will be described below. As shown in FIG.

[0045] The communication unit 310 is configured by a communication module. The communication module may be a wireless communication module conforming to standards such as IEEE802.11a / b / g / n / ac / ax, ZigBee, Wi-SUN, LTE, 5G, and 6G, or may be a wired communication module conforming to standards such as IEEE802.3.

[0046] For example, when it is necessary to adjust the power supply and demand balance of the power grid 12, the communication unit 310 may transmit a DR request to the lower management server 200 requesting adjustment of the power of the power grid 12. The DR request may include a down DR request requesting a decrease in forward flow power (or an increase in reverse flow power), or an up DR request requesting an increase in forward flow power (or a decrease in reverse flow power). The DR request may include information indicating a requested adjustment power amount to be adjusted in the entire facility group 100. The requested adjustment power amount may include a requested decrease in forward flow power (e.g., a down DR instruction power amount (Wh)). The DR request may include a requested increase in forward flow power (e.g., an up DR instruction power amount (Wh)).

[0047] The management unit 320 is configured with a storage medium such as a hard disk drive (HDD), a solid state drive (SSD), or a non-volatile memory.

[0048] For example, the management unit 320 may manage the amount of power that can be adjusted across the entire group of facilities 100 (hereinafter, the total adjustable amount of power). The total adjustable amount of power may be received from the lower level management server 200. The total adjustable amount of power may include the amount of power that can be reduced in forward flow power (or increased in reverse flow power) (amount of power that can be down-DR (Wh)). The total adjustable amount of power may include the amount of power that can be increased in forward flow power (or decreased in reverse flow power) (amount of power that can be up-DR (Wh)).

[0049] The control unit 330 may include at least one processor. The at least one processor may be configured by a single integrated circuit (IC), or may be configured by a plurality of circuits (such as integrated circuits and / or discrete circuits) communicatively connected to each other.

[0050] For example, the control unit 330 may formulate a control plan for the distributed power source based on the adjustable power amount. The control unit 330 may instruct the communication unit 310 to transmit a DR request in accordance with the control plan.

[0051] (Sub-management server) The lower level management server according to the embodiment will be described below. As shown in FIG.

[0052] The communication unit 210 is configured by a communication module. The communication module may be a wireless communication module conforming to standards such as IEEE802.11a / b / g / n / ac / ax, ZigBee, Wi-SUN, LTE, 5G, and 6G, or may be a wired communication module conforming to standards such as IEEE802.3.

[0053] For example, the communication unit 210 may receive facility information of the facility 100. The facility information may include information indicating the configuration of the distributed power sources possessed by the facility 100, or may include information indicating the specifications of the distributed power sources possessed by the facility 100. The facility information may include information indicating whether or not to participate in power supply and demand adjustment control (e.g., VPP control) related to the power grid 12.

[0054] The communication unit 210 may receive a planned value related to the generated power of each of the facilities 100. The communication unit 210 may receive a planned value related to the demand power of each of the facilities 100.

[0055] The communication unit 210 may transmit a control command to control devices installed in each of the facilities 100. The devices installed in each of the facilities 100 may include distributed power sources such as a solar cell device 110, a power storage device 120, and a fuel cell device 130. The devices installed in each of the facilities 100 may include load devices 140.

[0056] The management unit 220 is configured with a storage medium such as a hard disk drive (HDD), a solid state drive (SSD), or a non-volatile memory.

[0057] For example, the management unit 220 may manage one or more facilities 100 connected to the power grid 12. Management of one or more facilities 100 may be interpreted as management of one or more distributed power sources connected to the power grid 12.

[0058] The management unit 220 may manage information related to the facility 100. For example, the information related to the facility 100 includes the type of distributed power source (the solar cell device 110, the power storage device 120, or the fuel cell device 130) provided in the facility 100, the specifications of the distributed power source (the solar cell device 110, the power storage device 120, or the fuel cell device 130) provided in the facility 100, and the like. The specifications may include the rated power generation of the solar cell device 110, the rated charging power of the power storage device 120, the rated discharging power of the power storage device 120, and the rated output power of the fuel cell device 130. The specifications may include the rated capacity of the power storage device 120, the maximum charging and discharging power, and the like.

[0059] The control unit 230 may include at least one processor. The at least one processor may be configured by a single integrated circuit (IC), or may be configured by a plurality of circuits (such as integrated circuits and / or discrete circuits) communicatively connected to each other.

[0060] For example, the control unit 230 allocates the amount of adjustment power to be adjusted in each of the facilities 100 based on the DR request received from the upper management server 300. Specifically, the control unit 230 allocates the amount of adjustment power to be adjusted in each of the facilities 100 so that the total amount of adjustment power to be adjusted in each of the facilities 100 is equal to or greater than the requested adjustment power amount included in the DR request. The amount of adjustment power to be adjusted in each of the facilities 100 may be referred to as an individual adjustment power amount to distinguish it from the requested adjustment power amount.

[0061] The individual adjustment amount of power may be allocated for each facility 100, or may be allocated for each distributed power source (for example, the power storage device 120) installed in the facility 100.

[0062] (EMS) The EMS according to the embodiment will be described below. As shown in FIG.

[0063] The first communication unit 161 is configured by a communication module. The communication module may be a wireless communication module conforming to standards such as IEEE802.11a / b / g / n / ac / ax, ZigBee, Wi-SUN, LTE, 5G, and 6G, or may be a wired communication module conforming to standards such as IEEE802.3 or a unique dedicated protocol.

[0064] For example, the first communication unit 161 constitutes a first communication unit that communicates with the lower management server 200 via the network 11. The first communication unit 161 may receive a control command instructing the operation of a distributed power source (in the embodiment, the power storage device 120) from the lower management server 200. The control command may include information indicating the individual adjustment power amount that should be controlled by each of the power storage devices 120.

[0065] The first communication unit 161 may communicate with the load device 140 and may communicate with the measuring device 190 .

[0066] The second communication unit 162 is configured by a communication module. The communication module may be a wireless communication module conforming to standards such as IEEE802.11a / b / g / n / ac / ax, ZigBee, Wi-SUN, LTE, 5G, and 6G, or may be a wired communication module conforming to standards such as IEEE802.3, RS485, or a unique dedicated protocol.

[0067] For example, the second communication unit 162 may communicate with the solar cell device 110, the power storage device 120, and the fuel cell device 130. Although signal lines are omitted in FIG. 2, the second communication unit 162 may communicate with the load device 140 and may communicate with the measuring device 190.

[0068] The control unit 163 controls the EMS 160. The control unit 163 may include at least one processor. The at least one processor may be configured by a single integrated circuit (IC), or may be configured by a plurality of circuits (such as integrated circuits and / or discrete circuits) communicatively connected.

[0069] For example, the control unit 163 may control the solar cell device 110, the power storage device 120, and the fuel cell device 130. The control unit 163 may control the load device 140.

[0070] (Example of operation) An operation example according to the embodiment will be described below. A case will be described below in which the distributed power source used in the VPP control is the power storage device 120. Also, a case will be described in which specific control is performed to charge the power storage device 120 in advance before a power outage due to a natural disaster. The specific control may be referred to as BCP (Business Continuity Plan) control.

[0071] Here, the specific control may be control for charging the power storage device 120 until the remaining amount of stored power (e.g., SOC; State Of Charge) of the power storage device 120 becomes a predetermined remaining amount (e.g., SOC=100%, 80%, etc.). The specific control does not need to be applied to the power storage device 120 whose remaining amount of stored power is equal to or greater than the predetermined remaining amount (e.g., SOC=100%, 80%, etc.).

[0072] (Example 1) The first operation example is an operation for solving a problem that the load on the power grid 12 may increase significantly if specific controls are simultaneously performed on a large number of power storage devices 120 in preparation for a power outage caused by a natural disaster.

[0073] In the first operation example, the communication unit 210 described above constitutes a receiving unit that receives disaster information related to a natural disaster. The control unit 230 described above constitutes a control unit that controls two or more power storage devices connected to the power grid 12.

[0074] The lower management server 200 receives disaster information related to a natural disaster. The lower management server 200 may receive the disaster information from an external server 500. If the facility 100 is capable of acquiring the disaster information, the lower management server 200 may receive the disaster information from the facility 100 (e.g., the EMS 160).

[0075] First, application of specific control will be described. Application of specific control may be considered as an operation of transmitting a control command corresponding to the specific control to the power storage device 120. Application of specific control may include transmitting a control command to change the operation mode of the power storage device 120 to a charging mode.

[0076] The lower level management server 200 applies different specific controls to two or more power storage devices 120 as specific controls for charging the power storage devices 120 before a power outage in the power grid based on disaster information. Here, the different specific controls may include the following options.

[0077] In option 1, the lower level management server 200 may identify the extent of a natural disaster for each of the two or more power storage devices 120 based on the disaster information. The extent of a natural disaster may be identified by a warning level. The extent of a natural disaster may be identified by the scale of an earthquake, the height of a tsunami, or the scale of a typhoon.

[0078] The lower level management server 200 sets different target charging power for two or more power storage devices 120 according to the degree of the natural disaster. The target charging power is the charging power targeted by the power storage device 120 in specific control. The target charging power may be expressed as an instantaneous value (W or kW), an integrated value (Wh or kWh), or a remaining amount of stored power (%). The remaining amount of stored power may be expressed as SOC.

[0079] For example, the lower level management server 200 may set a first target charging power for a power storage device 120 that has suffered a relatively large natural disaster (e.g., a power storage device 120 that exists in an area where a special warning has been issued). The lower level management server 200 may set a second target charging power that is smaller than the first target charging power for a power storage device 120 that has suffered a relatively small natural disaster (e.g., a power storage device 120 that exists in an area where a warning has been issued).

[0080] For example, the degree of a natural disaster being relatively large or small may mean, for example, that when a special warning, warning, or advisory has been issued, the relatively large one is a special warning, and the relatively small one is an advisory. Also, when a special warning or warning has been issued, the relatively large one may be a special warning, and the relatively small one may be an advisory. Furthermore, when an advisory or advisory has been issued, the relatively large one may be an advisory, and the relatively small one may be an advisory. Note that the first target charging power may be set only when the natural disaster of the greatest degree has been issued. For example, when a special warning has been issued, a process such as setting the first target charging power may be executed.

[0081] Although not particularly limited, for power storage device 120 located in an area where an advisory has been issued, zero may be set as the target charging power, and specific control may not be applied.

[0082] In option 2, the lower level management server 200 may identify the extent of a natural disaster for each of the two or more power storage devices 120 based on the disaster information. The extent of a natural disaster may be identified by a warning level. The extent of a natural disaster may be identified by the scale of an earthquake, the height of a tsunami, or the scale of a typhoon.

[0083] The lower level management server 200 sets different charging start times according to the extent of the natural disaster for two or more power storage devices 120. The charging start times are the times at which the power storage devices 120 start charging under specific control.

[0084] For example, the lower management server 200 may set a first charging start time for a power storage device 120 that has suffered a relatively large natural disaster (e.g., a power storage device 120 that exists in an area where a special warning has been issued). The lower management server 200 may set a second charging start time that is later than the first charging start time for a power storage device 120 that has suffered a relatively small natural disaster (e.g., a power storage device 120 that exists in an area where a warning has been issued).

[0085] In option 3, the lower level management server 200 may, based on the disaster information, identify a spread time regarding the time when a natural disaster spreads to each of two or more power storage devices 120. The spread time may be the arrival time of a tsunami in the area where the power storage device 120 is located, or the time when a typhoon reaches the area where the power storage device 120 is located.

[0086] The lower level management server 200 sets different charging start times for two or more power storage devices 120 depending on the spread time. For example, the charging start time may be defined as a time that is a predetermined time before the spread time. The predetermined time may differ depending on the level of the natural disaster (e.g., the height of the tsunami or the scale of the typhoon). For example, a first predetermined time may be used when the level of the natural disaster is relatively large, and a second predetermined time that is shorter than the first predetermined time may be used when the level of the natural disaster is relatively small.

[0087] In the operation example 1, one or more options selected from option 1 to option 3 may be combined.

[0088] Secondly, application of return control for returning from the specific control will be described. Return from the specific control may be interpreted as release of the specific control. Application of return control may be considered as an operation of transmitting a control command corresponding to the return control to the power storage device 120.

[0089] When the threat of a power outage in the power grid due to a natural disaster is resolved, the lower level management server 200 receives information indicating the remaining amount of stored power (remaining power information) of each of the two or more power storage devices 120. The remaining amount of stored power may be expressed by SOC.

[0090] The elimination of the danger of a power outage may include the lifting of an emergency warning, the lifting of a warning, the lifting of an advisory, etc. The elimination of the danger of a power outage may include the typhoon's course deviating from the area where the power storage device 120 is located, the tsunami no longer reaching the area where the power storage device 120 is located, etc. When a power outage occurs due to a natural disaster, the elimination of the danger of a power outage may include the restoration of power from the power outage.

[0091] In addition, when the threat of a power outage is resolved, a case may be assumed in which a power outage actually occurs before the threat of a power outage is resolved, or a case may be assumed in which a power outage does not actually occur.

[0092] In operation example 1, the above-mentioned communication unit 210 constitutes a receiving unit that receives remaining power storage information indicating the remaining power storage amount of each of two or more power storage devices 120 when the threat of a power outage in the power grid due to a natural disaster is resolved.

[0093] When the threat of a power outage in the power grid due to a natural disaster is resolved, the lower level management server 200 applies different return controls to two or more power storage devices 120 as return controls for returning from specific control. Specifically, the lower level management server 200 sets different times as the times at which return control is applied (hereinafter, return times) to two or more power storage devices 120. The settings of the different times may include the options shown below.

[0094] Although not particularly limited, the content of the return control may be the control applied to the power storage device 120 before the specific control was executed (hereinafter, previous control), or may be control other than the previous control.

[0095] In option 1, the lower level management server 200 may set different times as the restoration times for two or more power storage devices 120 based on the remaining stored power amounts of the power storage devices 120 received in response to the resolution of the threat of a power outage.

[0096] For example, in a case where no power outage actually occurred, when the number of power storage devices 120 whose remaining amount of stored power is higher than the first remaining amount is equal to or greater than a threshold value, the lower management server 200 may set different times as the return time for two or more power storage devices 120. Although not particularly limited, the lower management server 200 may set a first return time for the power storage devices 120 whose remaining amount of stored power is relatively high, and set a second return time later than the first return time for the power storage devices 120 whose remaining amount of stored power is relatively low, assuming a case where discharge control of the power storage devices 120 is executed as return control.

[0097] For example, in a case where a power outage has actually occurred, when the number of power storage devices 120 whose remaining amount of stored power is lower than the second remaining amount is equal to or greater than a threshold value, the lower management server 200 may set different times as the return time for two or more power storage devices 120. Although not particularly limited, the lower management server 200 may set a first return time for the power storage devices 120 whose remaining amount of stored power is relatively low, and set a second return time later than the first return time for the power storage devices 120 whose remaining amount of stored power is relatively high, assuming a case where charging control of the power storage devices 120 is executed as return control.

[0098] In option 2, when the content of the return control is the previous control, the lower level management server 200 may set different times as the return times for two or more power storage devices 120 based on the content of the previous control.

[0099] For example, when the total of the discharge power of the previous control of two or more power storage devices 120 is greater than a predetermined discharge power, the lower management server 200 may set different times as the return time for two or more power storage devices 120. Although not particularly limited, the lower management server 200 may set a first return time for a power storage device 120 with a relatively high remaining amount of stored power, and set a second return time later than the first return time for a power storage device 120 with a relatively low remaining amount of stored power.

[0100] For example, when the total of the charging power of the previous control of two or more power storage devices 120 is greater than a predetermined charging power, the lower management server 200 may set different times as the return time for two or more power storage devices 120. Although not particularly limited, the lower management server 200 may set a first return time for a power storage device 120 with a relatively low remaining amount of stored power, and set a second return time later than the first return time for a power storage device 120 with a relatively high remaining amount of stored power.

[0101] (Example 2) Operation example 2 is an operation for solving the problem that when the power storage devices 120 used in the VPP include power storage devices 120 that autonomously execute specific control, the VPP control cannot be executed appropriately because the power storage devices 120 are autonomously charged. Note that autonomous execution may mean that the power storage devices 120 execute it at their own discretion, without following a control command received from the lower level management server 200.

[0102] In the second operation example, the communication unit 210 described above constitutes a receiving unit that receives, from each of the two or more power storage devices 120 connected to the power system 12, correspondence information related to a function of autonomously executing specific control for charging the power storage devices 120 before a power outage in the power system 12. The control unit 230 described above constitutes a control unit that executes charge control or discharge control of each of the two or more power storage devices 120 as power supply and demand adjustment control (VPP control) for the power system 12 based on the correspondence information.

[0103] The lower level management server 200 receives correspondence information related to a function of autonomously executing specific control from each of the power storage devices 120. The correspondence information may include information (static information) indicating whether or not the power storage device 120 has a function of autonomously executing specific control. The correspondence information may include information (dynamic information) indicating whether or not the power storage device 120 is autonomously executing specific control.

[0104] Based on the correspondence information, the lower level management server 200 executes charge control or discharge control of each of the two or more power storage devices 120 as power supply and demand adjustment control (VPP control) for the power system 12. The VPP control may include the following options.

[0105] In option 1, the lower level management server 200 excludes the first power storage device having the function of autonomously executing the specific control from the targets of the VPP control under a specific condition, and includes the second power storage device not having the function of autonomously executing the specific control as the targets of the VPP control. The specific control may include a condition that a power outage occurs in the area where the first power storage device is located, may include a condition that a power outage due to a natural disaster is expected in the area where the first power storage device is located, may include a condition that a planned power outage is scheduled in the area where the first power storage device is located, or may include a condition that targets all of the first power storage devices. The correspondence information used in such a case may be information (static information) indicating whether or not the device has the function of autonomously executing the specific control.

[0106] Here, the lower level management server 200 may exclude devices that contribute to the charging of the first power storage device from the targets of the VPP control under specific conditions. The devices that contribute to the charging of the first power storage device may include power generation devices (e.g., solar cell device 110, fuel cell device 130) that supply power to the first power storage device in the specific control of the first power storage device, and may also include load devices 140 that reduce power consumption to assist in the charging of the first power storage device.

[0107] The lower level management server 200 may transmit to the upper node (in an embodiment, the upper level management server 300 (AEMS or AC)) a message indicating that the second power storage device can be used under VPP control. The communication unit 210 described above constitutes a transmission unit.

[0108] The fact that the second power storage device can be used under VPP control may be indicated by a list of devices that can respond to a DR request (for example, a controllable device list). That is, the lower management server 200 may transmit the controllable device list including the second power storage device to the upper management server 300.

[0109] The lower management server 200 may transmit to the upper node (in an embodiment, the upper management server 300 (AEMS or AC)) that it is not possible to use the first power storage device and equipment that contributes to charging the first power storage device under VPP control.

[0110] The fact that the first power storage device cannot be used under VPP control may be indicated by a list of devices that cannot respond to a DR request (for example, a list of uncontrollable devices). That is, the lower management server 200 may transmit to the upper management server 300 a list of uncontrollable devices that includes the first power storage device and devices that contribute to charging the first power storage device.

[0111] In option 2, the lower level management server 200 excludes the third power storage device that is executing or scheduled to execute specific control from the targets of VPP control, and includes the fourth power storage device that is not executing or scheduled to execute specific control as the targets of VPP control. The correspondence information used in such a case may be information (dynamic information) indicating whether or not specific control is being executed autonomously or whether or not it is scheduled to be executed. The case where it is scheduled to be executed may include a case where specific control is scheduled to be executed autonomously at the time when a DR request is expected. Whether or not specific control is scheduled to be executed autonomously may be specified based on whether or not a power outage due to a natural disaster is expected at the time when a DR request is expected, or whether or not a planned power outage is scheduled at the time when a DR request is expected.

[0112] Here, the lower level management server 200 may exclude devices that contribute to charging the third power storage device from the targets of VPP control. The devices that contribute to charging the third power storage device may include power generation devices (e.g., solar cell device 110, fuel cell device 130) that supply power to the third power storage device in specific control of the third power storage device, and may also include load devices 140 that reduce power consumption to assist in charging the third power storage device.

[0113] The lower level management server 200 may transmit to the upper node (in the embodiment, the upper level management server 300 (AEMS or AC)) a message indicating that the fourth power storage device can be used under VPP control. The communication unit 210 described above constitutes a transmission unit.

[0114] The fact that the fourth power storage device can be used under VPP control may be indicated by a list of devices that can respond to a DR request (for example, a controllable device list). That is, the lower management server 200 may transmit a controllable device list including the fourth power storage device to the upper management server 300.

[0115] The lower management server 200 may transmit to the upper node (in an embodiment, the upper management server 300 (AEMS or AC)) a message indicating that it is not possible to use the third power storage device and equipment that contributes to charging the third power storage device under VPP control.

[0116] The fact that the third power storage device cannot be used under VPP control may be indicated by a list of devices that cannot respond to a DR request (for example, a list of uncontrollable devices). That is, the lower management server 200 may transmit to the upper management server 300 a list of uncontrollable devices that includes the third power storage device and devices that contribute to charging the third power storage device.

[0117] In the second operational example, whether option 1 or option 2 is to be used may be determined based on the VPP service contract or the like.

[0118] (Power management method) A power management method according to an embodiment will be described below. In the following, the lower level management server 200 may constitute at least a part of a VPP controller.

[0119] First, the power management method according to the above-mentioned operation example 1 will be described with reference to FIGS.

[0120] 6, in step S10, a situation occurs in which a natural disaster occurs or a situation in which a natural disaster is predicted occurs. The situation in which a natural disaster occurs may be a situation in which heavy rain, flood, heavy snow, strong wind, snowstorm, ocean waves, high tide, lightning, dense fog, dryness, avalanche, icing, snow accumulation, melting snow, frost, low temperature, earthquake, tsunami, typhoon, etc. The situation in which a natural disaster is predicted may be a situation in which various warnings are issued, or a situation in which a natural disaster (earthquake, tsunami, typhoon, etc.) is predicted to spread to the area in which the power storage device 120 is located.

[0121] In step S11, the lower management server 200 acquires disaster information. The lower management server 200 may periodically receive the disaster information from the external server 500. The lower management server 200 may receive the disaster information from the external server 500 in response to the occurrence or prediction of a disaster.

[0122] In step S12A, the lower level management server 200 transmits a control command to instruct the execution of specific control to the power storage device #A. In step S12B, the lower level management server 200 transmits a control command to instruct the execution of specific control to the power storage device #B.

[0123] In step 13A, power storage device #A executes specific control in response to the control command. In step 13B, power storage device #B executes specific control in response to the control command.

[0124] Here, the target charging power referred to in the specific control of the power storage device #A may be different from the target charging power referred to in the specific control of the power storage device #B. For example, in a case where a special warning is issued in the area where the power storage device #A is located and a warning is issued in the area where the power storage device #B is located, the target charging power of the power storage device #A may be larger than the target charging power of the power storage device #B.

[0125] The time (charging start time) when power storage device #A starts specific control may be different from the time (charging start time) when power storage device #B starts specific control. For example, in a case where a special warning is issued in the area where power storage device #A is located and a warning is issued in the area where power storage device #B is located, the charging start time of power storage device #A may be earlier than the charging start time of power storage device #B.

[0126] As shown in Fig. 7, in step S20, a situation occurs in which the danger of a power outage is resolved. The elimination of the danger of a power outage may include the lifting of an emergency warning, the lifting of a warning, the lifting of an advisory, and the like. The elimination of the danger of a power outage may include the typhoon's course deviating from the area where the power storage device 120 is located, the tsunami no longer reaching the area where the power storage device 120 is located, and the like. When a power outage occurs due to a natural disaster, the elimination of the danger of a power outage may include the restoration of power from the power outage.

[0127] In step S21A, power storage device #A waits for a control command transmitted from lower level management server 200. In step S21B, power storage device #B waits for a control command transmitted from lower level management server 200.

[0128] In step S22A, power storage device #A transmits remaining power storage information indicating the remaining power storage amount of power storage device #A to lower management server 200. In step S22B, power storage device #B transmits remaining power storage information indicating the remaining power storage amount of power storage device #B to lower management server 200. Power storage device #A and power storage device #B may transmit the remaining power storage information in response to a request from lower management server 200, or may transmit the remaining power storage information autonomously in response to the elimination of the threat of a power outage.

[0129] In step S23A, lower level management server 200 transmits a control command to power storage device #A to instruct the execution of return control. In step S23B, lower level management server 200 transmits a control command to power storage device #B to instruct the execution of return control.

[0130] In step 24A, power storage device #A executes return control in response to the control command. In step 24B, power storage device #B executes return control in response to the control command.

[0131] Here, the time (return time) at which power storage device #A starts the return control may be different from the time (return time) at which power storage device #B starts the return control. The content of the return control may be the control (previous control) that was applied to power storage device 120 before the specific control was executed, or may be control other than the previous control.

[0132] Secondly, a power management method according to the above-mentioned operation example 2 will be described with reference to Fig. 8. In Fig. 8, power storage device #C is an example of a power storage device 120 having a function of autonomously executing specific control. Power storage device #D is an example of a power storage device 120 not having a function of autonomously executing specific control.

[0133] 8, in step S30, the lower management server 200 receives correspondence information related to the function of autonomously executing specific control from the power storage device #C and the power storage device #D. The correspondence information received in step S30 is information (static information) indicating whether or not the power storage device #C and the power storage device #D have the function of autonomously executing specific control. The power storage device #C and the power storage device #D may transmit the correspondence information in response to a request from the lower management server 200.

[0134] In step S31, the lower level management server 200 may transmit a list of devices capable of supporting the DR request (compatible device list) to the AC. For example, the compatible device list may include power storage device #D, but not power storage device #C. The lower level management server 200 may transmit a list of devices incapable of supporting the DR request (incompatible device list) to the AC. For example, the incompatible device list may include power storage device #C, but not power storage device #D.

[0135] In step S40, a situation occurs in which a natural disaster occurs or a situation in which a natural disaster is predicted occurs. The situation in which a natural disaster occurs may be a situation in which heavy rain, flood, heavy snow, strong wind, snowstorm, ocean waves, high tide, lightning, dense fog, dryness, avalanche, icing, snow accumulation, melting snow, frost, low temperature, earthquake, tsunami, typhoon, etc. The situation in which a natural disaster is predicted may be a situation in which various warnings are issued, or a situation in which a natural disaster (earthquake, tsunami, typhoon, etc.) is predicted to spread to the area in which the power storage device 120 is located.

[0136] In step S41, the lower management server 200 acquires disaster information. The lower management server 200 may periodically receive the disaster information from the external server 500. The lower management server 200 may receive the disaster information from the external server 500 in response to the occurrence or prediction of a disaster.

[0137] In step S42, when a natural disaster occurs or is predicted in the area of ​​the power storage device #C, the power storage device #C autonomously executes specific control. Autonomous execution may mean that the power storage device 120 executes the specific control at its own discretion, without depending on a control command received from the lower management server 200.

[0138] In step S43, the lower level management server 200 transmits information (information request) to the power storage device #C and the power storage device #D inquiring as to whether or not specific control is being executed or is scheduled to be executed.

[0139] In step S44, the lower management server 200 receives from the power storage device #C and the power storage device #D response information related to the function of autonomously executing specific control. The response information received in step S44 is information (static information) indicating whether or not specific control is being executed or is scheduled to be executed. The power storage device #C and the power storage device #D may transmit the autonomous response information without being requested by the lower management server 200.

[0140] In step S45, the lower management server 200 may transmit a list of devices capable of supporting the DR request (compatible device list) to the AC. For example, the compatible device list may include power storage device #D, but not power storage device #C. The lower management server 200 may transmit a list of devices incapable of supporting the DR request (incompatible device list) to the AC. For example, the incompatible device list may include power storage device #C, but not power storage device #D.

[0141] In step S50, the AC formulates a control plan for maintaining the balance between power supply and demand in the power grid 12. The AC may formulate the control plan excluding the power storage device #C, based on the information (device list) received in step S31 or step S45.

[0142] In step S51, the AC transmits a DR request to the lower management server 200 in accordance with the control plan. The DR request may include information indicating the requested adjustment power amount to be adjusted in the entire group of facilities 100.

[0143] In step S52, the lower management server 200 allocates the amount of adjustment power to be adjusted in each of the facilities 100. The lower management server 200 allocates the amount of adjustment power to be adjusted in each of the facilities 100 so that the total amount of adjustment power to be adjusted in each of the facilities 100 is equal to or greater than the requested adjustment power amount included in the DR request. Here, the lower management server 200 excludes power storage device #C from the targets of VPP control (targets for allocation of adjustment power amount) and includes power storage device #D in the targets of VPP control (targets for allocation of adjustment power amount).

[0144] In step S53, the lower level management server 200 transmits a control command to instruct charging or discharging to the power storage device #D in accordance with the allocation result in step S52.

[0145] 8, for convenience of explanation, both option 1 (steps S30 and S31) of operation example 2 and option 2 (steps S43 to S45) of operation example 2 are described. However, operation example 2 is not limited to this.

[0146] For example, when option 1 is adopted, the processes of steps S43 to S45 may be omitted. In such a case, the power storage device #C may be excluded from the target of VPP control, regardless of whether the power storage device #C actually executes specific control or not.

[0147] Alternatively, when option 1 is adopted, the processes of steps S30 and S31 may be omitted. In such a case, when the power storage device #C actually executes the specific control, the power storage device #C may be excluded from the target of the VPP control, and when the power storage device #C does not actually execute the specific control, the power storage device #C may not be excluded from the target of the VPP control.

[0148] (Action and Effects) In the embodiment, the lower level management server 200 applies different specific controls to two or more power storage devices 120 as specific controls for charging the power storage devices 120 before a power outage in the power grid 12 based on disaster information. With this configuration, it is possible to prevent two or more power storage devices 120 from simultaneously starting specific controls (charging), thereby suppressing an increase in the load on the power grid 12 (for example, an unexpected increase).

[0149] In an embodiment, when the risk of a power outage in the power grid 12 due to a natural disaster is resolved, the lower level management server 200 receives information indicating the remaining amount of stored power in each of the two or more power storage devices 120. With this configuration, by grasping the remaining amount of stored power in each power storage device 120, which differs depending on whether a power outage has actually occurred, before the risk of a power outage is resolved, it is possible to appropriately execute VPP control after the risk of a power outage is resolved.

[0150] In the embodiment, when the danger of a power outage in the power grid 12 due to a natural disaster is eliminated, the lower level management server 200 applies different return controls to two or more power storage devices 120 as return controls for returning from specific control. By avoiding a situation in which the power storage devices 120 start charging or discharging all at once after the danger of a power outage is eliminated, an increase in the load on the power grid 12 (for example, an unexpected increase) can be suppressed.

[0151] In the embodiment, the lower level management server 200 receives correspondence information related to a function of autonomously executing specific control from each of the power storage devices 120. With this configuration, it is possible to appropriately execute VPP control by assuming a case in which the power storage device 120 autonomously executes specific control. For example, it is possible to avoid a situation in which a power storage device 120 that autonomously executes specific control executes control different from a control command (i.e., specific control). Alternatively, it is possible to avoid a situation in which the specific control autonomously executed by the power storage device 120 is changed by a control command.

[0152] [Other embodiments] Although the present invention has been described by the above-mentioned embodiment, the description and drawings forming a part of this disclosure should not be understood as limiting the present invention. From this disclosure, various alternative embodiments, examples and operating techniques will become apparent to those skilled in the art.

[0153] In the above disclosure, a case has been exemplified in which the distributed power source used in VPP control is the power storage device 120. However, the above disclosure is not limited to this. The distributed power source used in VPP control may include a solar cell device 110, a fuel cell device 130, etc. The distributed power source used in VPP control may include a wind power generation device, a geothermal power generation device, etc.

[0154] In the above disclosure, the distributed power source used in the VPP control may be interpreted as a distributed power source system including the power storage device 120 and the EMS 160.

[0155] In the above disclosure, the term "generated power" is mainly used, but the term "generated power" may also be read as "reverse flow power."

[0156] In the above disclosure, the term "procured power" has been mainly used, but "procured power" may be read as "forward flow power." "Procured power" may be considered to be a term used for the forward flow power of the group of facilities 100, and "demand power" may be considered to be a term used for the forward flow power of each of the facilities 100.

[0157] Although not specifically mentioned in the above disclosure, communication between the VPP controller and the power storage device 120 may be performed in a manner compliant with ECHONET Lite (registered trademark).

[0158] Although not specifically mentioned in the above disclosure, power may be expressed as an instantaneous value (W / kW) or an integrated value per unit time (Wh / kWh).

[0159] Although not specifically mentioned in the above disclosure, a program may be provided that causes a computer to execute each process performed by the lower level management server 200. The program may also be recorded in a computer-readable medium. Using the computer-readable medium, it is possible to install the program in the computer. Here, the computer-readable medium on which the program is recorded may be a non-transient recording medium. The non-transient recording medium is not particularly limited, and may be, for example, a recording medium such as a CD-ROM or a DVD-ROM.

[0160] Alternatively, a chip may be provided that is configured by a memory that stores programs for executing the various processes performed by the lower level management server 200 and a processor that executes the programs stored in the memory.

[0161] [Note] The above disclosure may be expressed as follows: A first feature is that the power management device includes a receiving unit that receives, from each of two or more power storage devices connected to a power system, response information regarding a function of autonomously executing specific control for charging the power storage device before a power outage in the power system, and a control unit that executes charging control or discharging control of each of the two or more power storage devices as power supply and demand adjustment control for the power system based on the response information.

[0162] A second feature is that, in the first feature, the control unit excludes a first power storage device having a function of autonomously executing the specific control from the targets of the power supply and demand adjustment control under specific conditions, and includes a second power storage device that does not have the function of autonomously executing the specific control from the targets of the power supply and demand adjustment control.

[0163] A third feature is the power management device according to the second feature, wherein the control unit excludes, under the specific condition, a device that contributes to charging the first power storage device from targets of the power supply and demand adjustment control.

[0164] A fourth feature is a power management device according to the second or third feature, further comprising a transmitter that transmits information to a higher-level node indicating that the second power storage device can be used in the power supply and demand adjustment control.

[0165] A fifth feature is a power management device which, in any one of the first to fourth features, is such that the control unit excludes a third power storage device which is currently executing or is scheduled to execute the specific control from the targets of the power supply and demand adjustment control, and includes a fourth power storage device which is not currently executing or is not scheduled to execute the specific control from the targets of the power supply and demand adjustment control.

[0166] A sixth feature is the power management device according to the fifth feature, wherein the control unit excludes a device that contributes to charging the third power storage device from targets of the power supply and demand adjustment control.

[0167] A seventh feature is a power management device according to the fifth or sixth feature, further comprising a transmitter that transmits information to a higher-level node indicating that the fourth power storage device can be used in the power supply and demand adjustment control.

[0168] An eighth feature is a power management method comprising: a step of receiving, from each of two or more power storage devices connected to a power system, response information regarding a function of autonomously executing specific control for charging the power storage device before a power outage in the power system; and a step of executing charge control or discharge control of each of the two or more power storage devices as power supply and demand adjustment control for the power system based on the response information. [Explanation of symbols]

[0169] Reference Signs List 1...Power management system, 11...Network, 12...Power system, 100...Facility, 110...Solar cell device, 120...Electricity storage device, 130...Fuel cell device, 140...Load device, 160...EMS, 161...First communication unit, 162...Second communication unit, 163...Control unit, 190...Measuring device, 200...Lower management server, 210...Communication unit, 220...Management unit, 230...Control unit, 300...Upper management server, 310...Communication unit, 320...Management unit, 330...Control unit, 400...Third-party server, 500...External server

Claims

1. a receiving unit that receives, from each of two or more power storage devices connected to a power grid, correspondence information relating to a function of autonomously executing specific control for executing charging of the power storage device before a power outage in the power grid; a control unit that executes charge control or discharge control of each of the two or more power storage devices as power supply and demand adjustment control for the power grid based on the correspondence information, the control unit excludes a third power storage device that is executing or has a plan to execute the specific control from targets of the power supply and demand adjustment control, and includes a fourth power storage device that is not executing or has a plan to execute the specific control as targets of the power supply and demand adjustment control, the third power storage device and the fourth power storage device are power storage devices having a function of autonomously executing the specific control,

2. The power management device of claim 1, wherein the control unit excludes a first power storage device having a function of autonomously executing the specific control from the targets of the power supply and demand adjustment control under a specific condition, and includes a second power storage device that does not have the function of autonomously executing the specific control as the targets of the power supply and demand adjustment control.

3. The power management device according to claim 2 , wherein the control unit excludes a device that contributes to charging the first power storage device from targets of the power supply and demand adjustment control under the specific condition.

4. The power management device according to claim 2 , further comprising a transmission unit configured to transmit, to a higher-level node, information indicating that the second power storage device can be used in the power supply and demand adjustment control.

5. The power management device according to claim 1 , wherein the control unit excludes a device that contributes to charging the third power storage device from targets of the power supply and demand adjustment control.

6. The power management device according to claim 1 , further comprising a transmission unit configured to transmit, to a higher-level node, information indicating that the fourth power storage device can be used in the power supply and demand adjustment control.

7. A step A of receiving, from each of two or more power storage devices connected to a power grid, correspondence information relating to a function of autonomously executing specific control for executing charging of the power storage device before a power outage in the power grid; and a step B of executing charge control or discharge control of each of the two or more power storage devices as power supply and demand adjustment control for the power grid based on the correspondence information, The step B includes a step of excluding a third power storage device that is executing or scheduled to execute the specific control from the targets of the power supply and demand adjustment control, and including a fourth power storage device that is not executing or scheduled to execute the specific control from the targets of the power supply and demand adjustment control, the third power storage device and the fourth power storage device are power storage devices having a function of autonomously executing the specific control.

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