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) have become known for continuing business activities even in the event of a natural disaster or other event. From the perspective of electricity, specific control has been proposed to prepare for a power outage caused by a natural disaster by charging a power storage device in advance. Note that specific control is envisioned 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] Japanese Patent Application Publication No. 2018-207782 Summary of the Invention [Problem to be solved by the invention]

[0004] Meanwhile, a technology using a power storage device (for example, a VPP (Virtual Power Plant)) 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 such a case, if the storage devices used in the VPP include storage devices that autonomously perform specific control, there is a possibility that charging of the storage devices will be performed autonomously, and therefore VPP control may not be able to be performed properly.

[0006] Therefore, the present invention has been made to solve the above-described problems, and when assuming a power storage device that autonomously executes specific control in preparation for a power outage associated with a natural disaster, it is an object to provide a power management device and a power management method that enable appropriate execution of VPP control.

Means for Solving the Problems

[0007] One aspect of the disclosure is a power management device including: a receiving unit that receives correspondence information regarding a function of autonomously executing specific control for charging a power storage device before a power outage of the power grid from each of two or more power storage devices connected to the power grid; and a control unit that executes charge control or discharge control for each of the two or more power storage devices as power supply and demand adjustment control regarding the power grid based on the correspondence information.

[0008] One aspect of the disclosure is a power management method including: receiving correspondence information regarding a function of autonomously executing specific control for charging a power storage device before a power outage of the power grid from each of two or more power storage devices connected to the power grid; and executing charge control or discharge control for each of the two or more power storage devices as power supply and demand adjustment control regarding the power grid based on the correspondence information.

Effects of the Invention

[0009] According to the present invention, when assuming a power storage device that autonomously executes specific control in preparation for a power outage associated with a natural disaster, it is possible to provide a power management device and a power management method that enable appropriate execution of VPP control.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

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DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, 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) Hereinafter, the power management system according to the embodiment will be described. The power management system may simply be referred to as a power system.

[0013] As shown in FIG. 1, the power management system 1 has a facility 100. The power management system 1 includes a subordinate management server 200, a superior management server 300, a third-party server 400, and an external server 500.

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

[0015] Facility 100 is connected to the power grid 12, and may be supplied with power from the power grid 12 or may supply power to the power grid 12. The power from the power grid 12 to Facility 100 may be referred to as forward power flow. The power from Facility 100 to the power grid 12 may be referred to as reverse power flow. In FIG. 1, Facilities 100A to 100C are illustrated as Facility 100.

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

[0017] The lower-level management server 200 is managed by an operator who manages power related to the power grid 12 or Facility 100. The 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 Facility Group 100.

[0018] Hereinafter, a case where the lower-level management server 200 is managed by an RA will be exemplified. The lower-level management server 200 may also be referred to as an RA, and the RA may also 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-level management server 300 is managed by an operator who manages power related to the power grid 12. The upper-level management server 300 may be managed by an operator who provides various services. The upper-level management server 300 may be referred to as an AEMS (Area Energy Management System) or may be referred to as an AC (Aggregation Controller). Details of the upper-level management server 300 will be described later (see FIG. 3).

[0020] The operator may be a retail electricity operator. The retail electricity operator may include a regional electricity operator (general electricity operator) that manages a base such as the power system 12, and may also include a new electricity operator other than the regional electricity operator. It is assumed that the new electricity operator may sell electricity to the facility by procuring electricity from the electricity market. The electricity market may include a wholesale electricity market for transactions of electricity (procured electricity) supplied to the facility 100, may include an electricity adjustment market for adjusting the power supply-demand gap after the gate closure of the wholesale electricity market, and may include a capacity market for transactions of supply capacity (for example, reverse power flow electricity). The electricity market may include electricity transactions with other retail electricity operators. The electricity market may include electricity transactions with other power generation operators. That is, the electricity market may be an exchange for conducting electricity transactions regardless of forms such as one-to-one, one-to-many, or many-to-many.

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

[0022] The third-party server 400 is managed by an operator that manages the power supply-demand balance of the power system 12. The operator may manage the electricity market related to the power system 12. For example, the third-party server 400 may have a function of checking the imbalance of the procured electricity. The third-party server 400 may have a function of checking the imbalance of the generated electricity. For example, the third-party server may perform the operations shown below.

[0023] First, the third-party server 400 may check whether the difference (imbalance) between the planned value and the actual value of the procured power exceeds a predetermined difference. The planned value and the actual value may be aggregated every unit period (for example, 30 minutes), and the imbalance may be checked every unit period (for example, 30 minutes). When the imbalance exceeds the predetermined difference, the third-party server 400 may impose a penalty on the operator who manages the upper management server 300. When the imbalance does not exceed the predetermined difference, the third-party server 400 may give an incentive to the operator who manages the upper management server 300. The penalty and the incentive may be monetary.

[0024] Second, the third-party server 400 may check whether the difference (imbalance) between the planned value and the actual value of the generated power exceeds a predetermined difference. The planned value and the actual value may be aggregated every unit period (for example, 30 minutes), and the imbalance may be checked every unit period (for example, 30 minutes). When the imbalance exceeds the predetermined difference, the third-party server 400 may impose a penalty on the operator who manages the upper management server 300. When the imbalance does not exceed the predetermined difference, the third-party server 400 may give an incentive to the operator who manages the upper management server 300. The penalty and the incentive may be monetary.

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

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

[0027] The external server 500 may include a server that manages information regarding natural disasters (hereinafter, disaster information). The natural disasters may include disasters that affect the power outage of the power grid 12. The disasters that affect the power outage of the power grid 12 may include secondary disasters of natural disasters (such as fires).

[0028] First, the disaster information may include information indicating the degree of natural disaster (hereinafter, warning level) for each type of disaster such as heavy rain, heavy snow, strong wind, blizzard, wave, high tide, etc. The types of warning levels may include levels such as special warning, warning, and cautionary notice.

[0029] Here, natural disasters with special warnings, natural disasters with warnings, and natural disasters with cautionary messages may be different from each other. Natural disasters with special warnings may include heavy rain, heavy snow, strong winds, blizzards, waves, and high tides. Natural disasters with warnings may include heavy rain, floods, heavy snow, strong winds, blizzards, waves, and high tides. Natural disasters with cautionary messages may include heavy rain, floods, heavy snow, strong winds, snowstorms, waves, high tides, lightning, thick fog, dryness, landslides, icing, snow accumulation, snowmelt, frost, and low temperatures.

[0030] Second, the disaster information may include information regarding earthquakes. Information regarding earthquakes may include information indicating the epicenter and information indicating the magnitude of the earthquake.

[0031] Third, the disaster information may include information regarding tsunamis. Information regarding tsunamis may include information indicating the arrival time of tsunamis in each region and information indicating the height of tsunamis in each region.

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

[0033] In the embodiment, the power supply and demand adjustment control service for the power system 12 (hereinafter, VPP (Virtual Power Plant) service) will be described using the distributed power sources installed in the facility 100. AC may be considered as an entity that aggregates the amount of power controlled by the RA and directly conducts power transactions with general power transmission and distribution operators or retail electricity operators. The RA may be considered as an entity that directly concludes a contract for the VPP service with the facility 100 (customer) and conducts resource control.

[0034] Although not particularly limited, the power supply and demand adjustment control may include control for adjusting the power supply and demand balance of the power system 12. The power supply and demand adjustment control may include control for adjusting the imbalance regarding the power purchased, control for adjusting the imbalance regarding the generated power, and the like.

[0035] Here, the entity that transmits control commands to the distributed power sources installed in Facility 100 may be referred to as a VPP controller. When the subordinate management server 200 has the cooperation function of the VPP service, the subordinate management server 200 and the EMS 160 described later may constitute a VPP controller. In such a case, the subordinate management server 200 may include a first server that functions as an RA and a second server that has the cooperation function of the VPP service. The first server and the second server may be separate servers or may be aggregated 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) Hereinafter, the facility according to the embodiment will be described. As shown in FIG. 2, the facility 100 includes a solar power generation 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 include a measurement device 190.

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

[0039] The power storage device 120 is a distributed power source that charges and discharges electric power. For example, the power storage device 120 is composed of a PCS and power storage cells. Here, the installation may mean that the power storage device 120 and the power grid 12 are connected. Hereinafter, 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 grid 12. The power storage device 120 may also be considered as an example of a distributed power source used for VPP control.

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

[0041] For example, the fuel cell device 130 may be a solid oxide fuel cell (SOFC), a polymer electrolyte fuel cell (PEFC), a phosphoric acid fuel cell (PAFC), or a molten carbonate fuel cell (MCFC). The load device 140 is a device that consumes 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 energy storage device 120, the fuel cell device 130, and the load device 140. In the embodiment, the EMS 160 is exemplified as a device that receives a control command from the lower-level management server 200, but such a device may also be referred to as a Gateway or simply as a control unit. To distinguish the EMS 160 from the lower-level management server 200, it may be referred to as a LEMS (Local EMS) or a HEMS (Home EMS). Details of the EMS 160 will be described later (see FIG. 5).

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

[0044] (Supervisory server) Hereinafter, the supervisory server according to the embodiment will be described. As shown in FIG. 3, the supervisory server 300 includes a communication unit 310, a management unit 320, and a control unit 330.

[0045] The communication unit 310 is composed of a communication module. The communication module may be a wireless communication module compliant with standards such as IEEE802.11a / b / g / n / ac / ax, ZigBee, Wi-SUN, LTE, 5G, 6G, etc., or may be a wired communication module compliant with standards such as IEEE802.3.

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

[0047] The management unit 320 is composed of storage media such as HDD (Hard Disk Drive), SSD (Solid State Drive), and non-volatile memory.

[0048] For example, the management unit 320 may manage the total adjustable power (hereinafter referred to as the total adjustable power amount) that can be adjusted for the entire facility group 100. The total adjustable power amount may be received from the subordinate management server 200. The total adjustable power amount may include the power amount (downward DR possible power amount (Wh)) for which the reduction of the forward power flow (or the increase of the reverse power flow) is possible. The total adjustable power amount may include the power amount (upward DR possible power amount (Wh)) for which the increase of the forward power flow (or the reduction of the reverse power flow) is possible.

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

[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 according to the control plan.

[0051] (Subordinate management server) Hereinafter, the subordinate management server according to the embodiment will be described. As shown in FIG. 4, the subordinate management server 200 includes a communication unit 210, a management unit 220, and a control unit 230.

[0052] The communication unit 210 is composed of a communication module. The communication module may be a wireless communication module compliant with standards such as IEEE802.11a / b / g / n / ac / ax, ZigBee, Wi-SUN, LTE, 5G, 6G, etc., or may be a wired communication module compliant with standards such as IEEE802.3.

[0053] For example, the communication unit 210 may receive the facility information of the facility 100. The facility information may include information indicating the configuration of the distributed power sources of the facility 100, and may also include information indicating the specifications of the distributed power sources of the facility 100. The facility information may include information indicating whether 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 the planned values regarding the generated power of each of the facilities 100. The communication unit 210 may receive the planned values regarding the demanded power of each of the facilities 100.

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

[0056] The management unit 220 is composed of a storage medium such as an HDD (Hard Disk Drive), an SSD (Solid State Drive), and a non-volatile memory.

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

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

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

[0060] For example, the control unit 230 allocates the amount of adjustment power to be adjusted at 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 at each of the facilities 100 so that the total amount of adjustment power to be adjusted at 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 at each of the facilities 100 may be referred to as the individual adjustment power amount in order to distinguish it from the requested adjustment power amount.

[0061] Note that the individual adjustment power amount may be allocated for each of the facilities 100, or may be allocated for each of the distributed power sources (for example, the power storage device 120) installed in the facilities 100.

[0062] (EMS) Hereinafter, the EMS according to the embodiment will be described. As shown in FIG. 5, the EMS 160 includes a first communication unit 161, a second communication unit 162, and a control unit 163.

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

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

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

[0066] The second communication unit 162 is constituted by a communication module. The communication module may be a wireless communication module compliant with standards such as IEEE802.11a / b / g / n / ac / ax, ZigBee, Wi-SUN, LTE, 5G, 6G, etc., or may be a wired communication module compliant with standards such as IEEE802.3, RS485, or an exclusive 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 the signal lines are omitted in FIG. 2, the second communication unit 162 may communicate with the load device 140 and may also communicate with the measurement 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 constituted by a single integrated circuit (IC) or may be constituted by a plurality of circuits (such as integrated circuits and / or discrete circuits) communicably 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] (Operation example) Hereinafter, an operation example according to an embodiment will be described. In the following, a case where the distributed power source used for VPP control is the energy storage device 120 will be described. Also, a case where specific control for pre-charging the energy storage device 120 before a power outage is executed in preparation for a power outage due to a natural disaster will be described. The specific control may also be referred to as BCP (Business Continuity Plan) control.

[0071] Here, the specific control may be a control that executes charging of the energy storage device 120 until the remaining charge amount of the energy storage device 120 (for example, SOC; State Of Charge) reaches a predetermined remaining amount (for example, SOC = 100%, 80%, etc.). The specific control may not be applied to the energy storage device 120 whose remaining charge amount is equal to or greater than a predetermined remaining amount (for example, SOC = 100%, 80%, etc.).

[0072] (Operation Example 1) Operation Example 1 is an operation for solving the problem that when specific control of a large number of energy storage devices 120 is executed simultaneously in preparation for a power outage due to a natural disaster, the load on the power system 12 may increase significantly.

[0073] In Operation Example 1, the communication unit 210 described above constitutes a receiving unit that receives disaster information regarding a natural disaster. The control unit 230 described above constitutes a control unit that controls two or more energy storage devices connected to the power system 12.

[0074] The lower-level management server 200 receives disaster information regarding a natural disaster. The lower-level management server 200 may receive disaster information from the external server 500. When the facility 100 can acquire disaster information, the lower-level management server 200 may receive disaster information from the facility 100 (for example, EMS 160).

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

[0076] Based on the disaster information, 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. Here, the different specific controls may include the following options.

[0077] In Option 1, the lower-level management server 200 may specify the degree of natural disaster for each of two or more power storage devices 120 based on the disaster information. The degree of natural disaster may be specified by a warning level. The degree of natural disaster may be specified by the magnitude of an earthquake, the height of a tsunami, or the magnitude of a typhoon.

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

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

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

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

[0082] In Option 2, the subordinate management server 200 may specify the degree of the natural disaster for each of two or more power storage devices 120 based on the disaster information. The degree of the natural disaster may be specified by the warning level. The degree of the natural disaster may be specified by the magnitude of the earthquake, the height of the tsunami, or the magnitude of the typhoon.

[0083] The subordinate management server 200 sets different charging start times for two or more power storage devices 120 according to the degree of the natural disaster. The charging start time is the time when the power storage device 120 starts charging in the specific control.

[0084] For example, the subordinate management server 200 may set a first charging start time for the power storage device 120 with a relatively large degree of the natural disaster (for example, the power storage device 120 existing in the area where a special warning is issued). The subordinate management server 200 may set a second charging start time later than the first charging start time for the power storage device 120 with a relatively small degree of the natural disaster (for example, the power storage device 120 existing in the area where a warning is issued).

[0085] In Option 3, the subordinate management server 200 may specify the impact time regarding the time when a natural disaster affects each of two or more power storage devices 120 based on disaster information. The impact time may be the arrival time of a tsunami in the area where the power storage device 120 is located, or may be the time when a typhoon reaches the area where the power storage device 120 is located.

[0086] The subordinate management server 200 sets different charge start times for two or more power storage devices 120 according to the impact time. For example, the charge start time may be defined as a time that is a predetermined time before the impact time. The predetermined time may vary according to the degree of the natural disaster (for example, the height of the tsunami, the scale of the typhoon). For example, when the degree of the natural disaster is relatively large, a first predetermined time may be used, and when the degree of the natural disaster is relatively small, a second predetermined time shorter than the first predetermined time may be used.

[0087] In Operation Example 1, one or more options selected from Options 1 to 3 may be combined.

[0088] Second, the application of the return control for returning from the specific control will be described. The return from the specific control may be interpreted as the release of the specific control. The application of the 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 crisis of a power outage in the power grid associated with a natural disaster is resolved, the subordinate management server 200 receives information (remaining charge amount information) indicating the remaining charge amount of each of two or more power storage devices 120. The remaining charge amount may be represented by the SOC.

[0090] The resolution of the power outage crisis may include the cancellation of a special warning, the cancellation of a warning, the cancellation of an advisory, etc. The resolution of the power outage crisis may include the typhoon's path deviating from the area where the power storage device 120 is located, the tsunami not reaching the area where the power storage device 120 is located, etc. When a power outage occurs due to a natural disaster, the resolution of the power outage crisis may include the restoration of power from the power outage.

[0091] In addition, when the crisis of power outage is resolved, even if it is assumed that a power outage actually occurs or does not actually occur before the crisis of power outage is resolved.

[0092] In Operation Example 1, when the crisis of power outage in the power system due to natural disaster is resolved, the communication unit 210 described above constitutes a receiving unit that receives remaining battery charge information indicating the remaining battery charge of each of two or more power storage devices 120.

[0093] When the crisis of power outage in the power system due to natural disaster is resolved, the subordinate management server 200 applies different return controls to two or more power storage devices 120 as a return control to return from specific control. Specifically, the subordinate management server 200 sets different times as the time to apply the return control (hereinafter, return time) to two or more power storage devices 120. The setting of different times may include the following options.

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

[0095] In Option 1, the subordinate management server 200 may set different times as the return time for two or more power storage devices 120 based on the remaining battery charge of the power storage device 120 received in response to the resolution of the power outage crisis.

[0096] For example, in a case where a power outage did not actually occur, when the number of power storage devices 120 with a remaining power storage amount higher than the first remaining amount is equal to or greater than a threshold value, the subordinate management server 200 may set different return times for two or more power storage devices 120. Although not particularly limited, assuming a case where the discharge control of the power storage device 120 is executed as a return control, the subordinate management server 200 may set a first return time for the power storage device 120 with a relatively high remaining power storage amount, and may set a second return time later than the first return time for the power storage device 120 with a relatively low remaining power storage amount.

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

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

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

[0100] For example, when the sum of the previously controlled charging powers of two or more power storage devices 120 is greater than a predetermined charging power, the subordinate management server 200 may set different times as the return times for the two or more power storage devices 120. Although not particularly limited, the subordinate management server 200 may set a first return time for the power storage device 120 with a relatively low remaining charge, and a second return time that is later than the first return time for the power storage device 120 with a relatively high remaining charge.

[0101] (Operation Example 2) Operation Example 2 is an operation for solving the problem that when there are power storage devices 120 that autonomously execute specific control among the power storage devices 120 used in the VPP, the VPP control cannot be appropriately executed because the charging of the power storage devices 120 is autonomously performed. Note that the autonomous execution may mean that the power storage device 120 executes based on its own judgment without depending on a control command received from the subordinate management server 200.

[0102] In Operation Example 2, the communication unit 210 described above constitutes a receiving unit that receives correspondence information regarding a function of autonomously executing specific control for charging the power storage device 120 from each of two or more power storage devices 120 connected to the power grid 12 before a power outage of the power grid 12. The control unit 230 described above constitutes a control unit that executes charge control or discharge control for each of two or more power storage devices 120 as power supply and demand adjustment control (VPP control) regarding the power grid 12 based on the correspondence information.

[0103] The subordinate management server 200 receives correspondence information regarding 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 it has a function of autonomously executing specific control. The correspondence information may include information (dynamic information) indicating whether or not specific control is being autonomously executed.

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

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

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

[0107] The lower-level management server 200 may transmit to the upper node (in the embodiment, the upper-level management server 300 (AEMS or AC)) that it is possible to use the second energy storage device in VPP control. The communication unit 210 described above constitutes a transmission unit.

[0108] The fact that it is possible to use the second energy storage device in VPP control may be a list of devices capable of responding to DR requests (for example, a list of controllable devices). That is, the lower-level management server 200 may transmit a list of controllable devices including the second energy storage device to the upper-level management server 300.

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

[0110] The fact that it is not possible to use the first power storage device in VPP control may be a list of devices that cannot respond to DR requests (for example, a list of devices that cannot be controlled). That is, the lower-level management server 200 may transmit a list of devices that cannot be controlled, including the first power storage device and devices contributing to the charging of the first power storage device, to the upper-level management server 300.

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

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

[0113] The lower-level management server 200 may transmit to the upper-level node (in the embodiment, the upper-level management server 300 (AEMS or AC)) that it is possible to use the fourth power storage device in VPP control. The communication unit 210 described above constitutes a transmission unit.

[0114] The fact that it is possible to use the fourth power storage device in VPP control may be a list of devices capable of responding to DR requests (for example, a list of controllable devices). That is, the lower-level management server 200 may transmit a list of controllable devices including the fourth power storage device to the upper-level management server 300.

[0115] The lower-level management server 200 may transmit to the upper-level node (in the embodiment, the upper-level management server 300 (AEMS or AC)) that it is not possible to use the third power storage device and devices that contribute to the charging of the third power storage device in VPP control.

[0116] The fact that it is not possible to use the third power storage device in VPP control may be a list of devices incapable of responding to DR requests (for example, a list of uncontrollable devices). That is, the lower-level management server 200 may transmit a list of uncontrollable devices including the third power storage device and devices that contribute to the charging of the third power storage device to the upper-level management server 300.

[0117] In Operation Example 2, it may be determined whether to use Option 1 or Option 2 according to a contract for VPP services or the like.

[0118] (Power Management Method) Hereinafter, the power management method according to the embodiment will be described. Hereinafter, the lower-level management server 200 may constitute at least a part of the VPP controller.

[0119] First, the power management method according to the above-described Operation Example 1 will be described with reference to FIGS. 6 and 7.

[0120] As shown in FIG. 6, in step S10, a situation where a natural disaster occurs or a situation where a natural disaster is predicted occurs. The situation where a natural disaster occurs may be a situation where heavy rain, flood, heavy snow, strong wind, blizzard, wave, high tide, thunder, thick fog, drought, landslide, icing, snowfall, snowmelt, frost, low temperature, earthquake, tsunami, typhoon, etc. occur. The situation where a natural disaster is predicted may be a situation where various warnings are issued, or a situation where it is predicted that a natural disaster (such as an earthquake, tsunami, typhoon, etc.) will spread to the area where the power storage device 120 is located.

[0121] In step S11, the subordinate management server 200 acquires disaster information. The subordinate management server 200 may receive disaster information from the external server 500 regularly. The subordinate management server 200 may also receive disaster information from the external server 500 according to the occurrence or prediction of a disaster.

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

[0123] In step 13A, the power storage device #A executes specific control according to the control command. In step 13B, the power storage device #B executes specific control according 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 greater than the target charging power of the power storage device #B.

[0125] The time when the power storage device #A starts specific control (charging start time) may be different from the time when the power storage device #B starts specific control (charging start time). 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 charging start time of the power storage device #A may be earlier than the charging start time of the power storage device #B.

[0126] As shown in FIG. 7, in step S20, a situation occurs where the crisis of power outage is resolved. The resolution of the power outage crisis may include the cancellation of a special warning, the cancellation of a warning, the cancellation of an advisory, etc. The resolution of the power outage crisis may include the typhoon's path deviating from the area where the power storage device 120 is located, the tsunami not reaching the area where the power storage device 120 is located, etc. When a power outage occurs due to a natural disaster, the resolution of the power outage crisis may include the restoration of power from the power outage.

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

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

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

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

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

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

[0133] As shown in FIG. 8, in step S30, the lower-level management server 200 receives correspondence information regarding 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 it has a 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-level management server 200.

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

[0135] In step S40, a situation where a natural disaster occurs or a situation where a natural disaster is predicted occurs. The situation where a natural disaster occurs may be a situation where heavy rain, flood, heavy snow, strong wind, blizzard, wave, high tide, thunder, thick fog, drought, landslide, icing, snowfall, snowmelt, frost, low temperature, earthquake, tsunami, typhoon, etc. occur. The situation where a natural disaster is predicted may be a situation where various warnings are issued, or a situation where it is predicted that a natural disaster (such as an earthquake, tsunami, typhoon, etc.) will spread to the area where the power storage device 120 is located.

[0136] In step S41, the subordinate management server 200 acquires disaster information. The subordinate management server 200 may receive disaster information from the external server 500 periodically. The subordinate management server 200 may receive disaster information from the external server 500 according 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 based on its own judgment without depending on a control command received from the subordinate management server 200.

[0138] In step S43, the subordinate management server 200 transmits information (information request) for inquiring whether specific control is being executed or there is a planned execution to the power storage device #C and the power storage device #D.

[0139] In step S44, the subordinate management server 200 receives response information regarding the function of autonomously executing specific control from the power storage device #C and the power storage device #D. The response information received in step S44 is information (static information) indicating whether specific control is being executed or there is a planned execution. The power storage device #C and the power storage device #D may transmit autonomous response information without being requested by the subordinate management server 200.

[0140] In step S45, the lower-level management server 200 may transmit a list of devices capable of responding to a DR request (capable device list) to the AC. For example, the capable device list may include the power storage device #D without including the power storage device #C. The lower-level management server 200 may transmit a list of devices incapable of responding to a DR request (incapable device list) to the AC. For example, the incapable device list may include the power storage device #C without including the power storage device #D.

[0141] In step S50, the AC formulates a control plan for maintaining the power balance of 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-level management server 200 according to the control plan. The DR request may include information indicating the requested adjustment power amount to be adjusted for the entire facility group 100.

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

[0144] In step S53, the lower-level management server 200 transmits a control command instructing charging or discharging to the power storage device #D according to the allocation result of step S52.

[0145] In FIG. 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, regardless of whether the power storage device #C actually executes the specific control, the power storage device #C may be excluded from the targets of the VPP control.

[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 is excluded from the targets 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 targets of the VPP control.

[0148] (Operation and Effect) In the embodiment, the subordinate 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 of the power grid 12 based on the disaster information. According to such a configuration, by avoiding a situation where two or more power storage devices 120 start the specific control (charging) at the same time, an increase (for example, an unexpected increase) in the load of the power grid 12 can be suppressed.

[0149] In the embodiment, when the crisis of a power outage of the power grid 12 associated with a natural disaster is resolved, the subordinate management server 200 receives information indicating the remaining charge amounts of each of the two or more power storage devices 120. According to such a configuration, before the crisis of the power outage is resolved, by grasping the remaining charge amounts of the respective power storage devices 120 that differ depending on whether a power outage has actually occurred, the VPP control after the crisis of the power outage is resolved can be appropriately executed.

[0150] In the embodiment, when the crisis of power outage in the power grid 12 associated with natural disasters is resolved, as a return control for returning from the specific control, different return controls are applied to two or more power storage devices 120. After the crisis of power outage is resolved, by avoiding a situation where the power storage devices 120 start charging or discharging simultaneously, an increase (for example, an unexpected increase) in the load of the power grid 12 can be suppressed.

[0151] In the embodiment, the subordinate management server 200 receives response information regarding the function of autonomously executing specific control from each of the power storage devices 120. According to such a configuration, assuming a case where the power storage device 120 autonomously executes specific control, VPP control can be appropriately executed. For example, it is possible to avoid a situation where a control different from the control command (that is, specific control) is executed in the power storage device 120 that autonomously executes specific control. Or, it is possible to avoid a situation where the specific control autonomously executed by the power storage device 120 is changed by a control command.

[0152] [Other Embodiments] The present invention has been described by the above-described embodiments, but the discussions and drawings forming a part of this disclosure should not be understood as limiting this invention. Various alternative embodiments, examples, and operation techniques will become apparent to those skilled in the art from this disclosure.

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

[0154] In the above-described disclosure, the distributed power source used for VPP control may be read 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" was mainly used, but the generated power may be read as reverse power flow.

[0156] In the above disclosure, the term "procured power" was mainly used, but the procured power may be read as forward power flow. The procured power is a term used for the forward power flow of the facility group 100, and it may be considered that the demand power is a term used for the forward power flow of each of the facilities 100.

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

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

[0159] Although not particularly mentioned in the above disclosure, a program may be provided to cause a computer to execute each process performed by the subordinate management server 200. Also, the program may be recorded on a computer-readable medium. By using a computer-readable medium, it is possible to install the program on a computer. Here, the computer-readable medium on which the program is recorded may be a non-transitory recording medium. The non-transitory recording medium is not particularly limited, but may be, for example, a recording medium such as a CD-ROM or a DVD-ROM.

[0160] Alternatively, a chip may be provided that includes a memory storing a program for executing each process performed by the subordinate management server 200 and a processor that executes the program stored in the memory.

[0161] [Appendix] The above disclosure may be expressed as follows. The first feature relates to a receiving unit that receives correspondence information regarding a function of autonomously executing specific control for charging a power storage device before a power outage of the power system from each of two or more power storage devices connected to the power system, and a control unit that executes charge control or discharge control for each of the two or more power storage devices as power supply and demand adjustment control regarding the power system based on the correspondence information. The power management device includes these components.

[0162] The 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 target of the power supply and demand adjustment control under specific conditions, and includes a second power storage device not having a function of autonomously executing the specific control in the target of the power supply and demand adjustment control. This is the power management device.

[0163] The third feature is that, in the second feature, the control unit excludes devices contributing to the charging of the first power storage device from the target of the power supply and demand adjustment control under the specific conditions. This is the power management device.

[0164] The fourth feature is that, in the second or third feature, the power management device includes a transmitting unit that transmits information indicating that the second power storage device can be used in the power supply and demand adjustment control to a higher-level node.

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

[0166] The sixth feature is that, in the fifth feature, the control unit excludes devices contributing to the charging of the third power storage device from the target of the power supply and demand adjustment control. This is the power management device.

[0167] The seventh feature is a power management device including a transmission unit that transmits, to a higher-level node, information indicating that it is possible to use the fourth power storage device in the power supply-demand adjustment control in the fifth feature or the sixth feature.

[0168] The eighth feature is a power management method including: a step of receiving correspondence information regarding a function of autonomously executing specific control for charging a power storage device before a power outage of the power grid from each of two or more power storage devices connected to the power grid; and a step of executing charge control or discharge control of each of the two or more power storage devices as power supply-demand adjustment control regarding the power grid based on the correspondence information.

Explanation of Signs

[0169] 1…Power management system, 11…Network, 12…Power grid, 100…Facility, 110…Solar power generation device, 120…Power storage device, 130…Fuel cell device, 140…Load equipment, 160…EMS, 161…First communication unit, 162…Second communication unit, 163…Control unit, 190…Measurement device, 200…Lower-level management server, 210…Communication unit, 220…Management unit, 230…Control unit, 300…Higher-level 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 correspondence information regarding a function of performing specific control for pre-charging each of two or more power storage devices connected to a power system before a power outage of the power system; A control unit that, based on the correspondence information, performs charge control or discharge control for each of the two or more power storage devices as power supply and demand adjustment control regarding the power system, and the control unit excludes a third power storage device that is performing or is scheduled to perform the specific control from the target of the power supply and demand adjustment control, and includes a fourth power storage device that is not performing or is not scheduled to perform the specific control in the target of the power supply and demand adjustment control, wherein the third power storage device and the fourth power storage device are power storage devices having a function of performing the specific control, a power management device.

2. The power management device according to claim 1, wherein the control unit excludes a first power storage device having a function of performing the specific control from the target of the power supply and demand adjustment control under specific conditions, and includes a second power storage device not having a function of performing the specific control in the target 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 of the first power storage device from the target of the power supply and demand adjustment control under the specific conditions.

4. The power management device according to claim 2, further comprising a transmission unit that transmits information indicating that it is possible to use the second power storage device in the power supply and demand adjustment control to a higher-level node.

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

6. The power management device according to claim 1, further comprising a transmission unit that transmits information indicating that it is possible to use the fourth power storage device in the power supply and demand adjustment control to a higher-level node.

7. Step A of receiving correspondence information regarding a function of performing specific control for pre-charging each of two or more power storage devices connected to a power system before a power outage of the power system from each of the two or more power storage devices; and Step B of, based on the correspondence information, performing charge control or discharge control for each of the two or more power storage devices as power supply and demand adjustment control regarding the power system, Step B excludes the third power storage device that is currently executing or is scheduled to execute the specific control from the target of the power supply and demand adjustment control, and includes the fourth power storage device that is not currently executing or is not scheduled to execute the specific control in the target 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 executing the specific control, and a power management method.

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