Management device and management system

Abstract

To provide a management device and a management system that can prevent a shortage in the planned power supply and demand for a power grid.SOLUTION: When an abnormality that disables charging / discharging is detected, a processor 21 estimates a predicted recovery time until recovery from the abnormality according to the type of abnormality. The processor 21 sets a charging / discharging vehicle equipped with a battery 55 that has been connected to an EVSE 30 when the abnormality has been detected as a vehicle to be used in the power supply and demand plan after the predicted recovery time has elapsed in the EVSE 30.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a management device and a management system. [Background technology]

[0002] In order to maintain the balance between supply and demand of electricity supplied from the power grid, attention has been focused on virtual power plants (VPPs) that integrate and control multiple distributed energy resources (DERs) as if they were a single power plant. For example, battery storage devices installed in vehicles are electrically connected to the power grid via charging and discharging equipment, and are incorporated into the power supply and demand plan for the power grid as one of the distributed energy resources.

[0003] Patent Publication No. 2022-098779 (Patent Document 1) discloses a vehicle diagnostic method for determining whether charging of a storage device in a target vehicle will begin when the storage device in the target vehicle becomes chargeable and can receive power from charging / discharging equipment. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-098779 Summary of the Invention [Problem to be solved by the invention]

[0005] In the vehicle diagnostic method disclosed in Patent Document 1, if a power adjustment resource such as a power storage device is detected to have an abnormality that makes it impossible to charge or discharge, the resource is excluded from the resources used in the power supply and demand plan. However, depending on the type of abnormality, the power adjustment resource may be able to recover from the abnormality quickly. Even in such a case, if the power adjustment resource is excluded from the power supply and demand plan, the planned power supply and demand for the power grid may be insufficient.

[0006] An object of the present disclosure is to provide a management device and a management system that can prevent a shortage of the planned power supply and demand amount for a power grid. [Means for solving the problem]

[0007] A management device disclosed herein manages a power supply and demand plan for multiple power adjustment resources, each of which can be electrically connected to a power grid via a charging / discharging facility. The management device includes a processor and a memory that stores a program executable by the processor. When an abnormality that disables charging / discharging is detected, the processor estimates a predicted recovery time until recovery from the abnormality depending on the type of abnormality. The processor sets a target vehicle equipped with a power adjustment resource that was connected to the charging / discharging facility at the time of the abnormality detection as a vehicle to be used in the power supply and demand plan after the predicted recovery time for the charging / discharging facility has elapsed.

[0008] According to this configuration, even if an abnormality that makes charging and discharging impossible is detected, the vehicle equipped with the power adjustment resource that was connected to the charging and discharging equipment at the time of the abnormality detection is incorporated into the power supply and demand plan based on the predicted recovery time from the abnormality. In this way, the power supply and demand plan is formulated taking into account the recovery time from the abnormality, so it is possible to prevent a shortage of the planned power supply and demand for the power grid.

[0009] Preferably, the abnormality may occur in a target vehicle. This allows the electric power supply and demand plan to be formulated including the vehicle in which the abnormality occurred, thereby preventing a shortage of the planned electric power supply and demand amount for the electric power grid.

[0010] Preferably, when an abnormality is detected, the processor may select a vehicle to connect to the charging / discharging facility instead of the target vehicle from a group of candidate vehicles used in the power supply and demand plan for the charging / discharging facility. The processor may add the target vehicle to the group of candidate vehicles. In this way, the next vehicle to connect to the charging / discharging facility is selected from the group of candidate vehicles, and the vehicle in which the abnormality was detected is added to the group of candidate vehicles, so that the group of candidate vehicles can be generated taking into account the recovery time from the abnormality.

[0011] Preferably, an order of connection to the charging / discharging facility may be determined for each vehicle in the group of candidate vehicles. When adding a target vehicle to the group of candidate vehicles, the processor may determine the order of connection of the target vehicles to the charging / discharging facility based on the predicted recovery time. In this way, the order of connection to the charging / discharging facility of a vehicle in the group of candidate vehicles in which an abnormality has been detected is determined based on the predicted recovery time, so that charging / discharging to the power grid can be performed with minimal unnecessary waiting time.

[0012] The management system disclosed herein includes a charging / discharging facility, a plurality of power adjustment resources each electrically connectable to a power grid via the charging / discharging facility, and a management device that manages a power supply and demand plan for the plurality of power adjustment resources. When an abnormality that disables charging / discharging is detected, the management device estimates a predicted recovery time until recovery from the abnormality depending on the type of abnormality. The management device sets a target vehicle equipped with a power adjustment resource that was connected to the charging / discharging facility at the time the abnormality was detected as a vehicle to be used in the power supply and demand plan after the predicted recovery time for the charging / discharging facility has elapsed.

[0013] According to this configuration, even if an abnormality that makes charging and discharging impossible is detected, the vehicle equipped with the power adjustment resource that was connected to the charging and discharging equipment at the time of the abnormality detection is incorporated into the power supply and demand plan based on the predicted recovery time from the abnormality. In this way, the power supply and demand plan is formulated taking into account the recovery time from the abnormality, so it is possible to prevent a shortage of the planned power supply and demand for the power grid. [Effects of the Invention]

[0014] According to the present disclosure, it is possible to prevent a shortage of the planned power supply and demand amount for the power grid. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a schematic overall configuration diagram of a management system including a management device according to an embodiment of the present invention; [Figure 2] 1 is a schematic diagram showing the configuration of each device, such as a management device, in the present embodiment. [Figure 3] 10 is a flowchart illustrating an example of processing executed by a management device and an EVSE. [Figure 4] FIG. 10 is a diagram illustrating an example of a charge / discharge vehicle and a group of charge / discharge candidate vehicles when an error occurs. [Figure 5] FIG. 10 is a diagram illustrating an example of a charge / discharge vehicle and a group of charge / discharge candidate vehicles when an error occurs. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference numerals, and description thereof will not be repeated.

[0017] 1 is a schematic overall configuration diagram of a management system 1 including a management device 20 according to the present embodiment. As shown in FIG. 1, the management system 1 includes the management device 20, a plurality of EVSEs (Electric Vehicle Service Equipment) 30, and a plurality of batteries 55 mounted on a plurality of vehicles 50, respectively.

[0018] Management System 1 is configured as part of a VPP (Virtual Power Plant) system. A VPP system uses advanced energy management technology that utilizes IoT (Internet of Things) to bundle a large number of DERs (Distributed Energy Resources) and remotely and centrally control these DERs to make them function as if they were a single power plant.

[0019] The VPP system includes a power grid PG and a management system 1. The power grid PG is a power grid consisting of power plants, transmission lines, high-voltage substations, etc., and is a power network managed by power companies (power generation companies, power transmission and distribution companies, electricity retailers, etc.).

[0020] Each of the multiple batteries 55 can be electrically connected to the power grid PG via the EVSE 30 and can be charged and discharged between the batteries 55 and the power grid PG. The batteries 55 are DERs and correspond to an example of a "power regulation resource" in the present disclosure. The EVSE 30 corresponds to an example of a "charging and discharging facility" in the present disclosure.

[0021] The management device 20 manages a power supply and demand plan (charge and discharge plan) for multiple batteries 55 (DERs) that can be charged and discharged between the power grid PG. The management device 20 is a server (aggregation server) managed and operated by an aggregator, and controls the DERs by directly concluding VPP service contracts with consumers (e.g., vehicle users) who own the DERs. An aggregator is an electric utility that provides energy management services by aggregating multiple DERs in a region, a specified facility, etc. The management device 20 creates a power supply and demand plan for the multiple batteries 55 (DERs) based on a DR (Demand Response) request from the electric power company.

[0022] Vehicle 50 is configured to be able to run using electric power stored in battery 55. In this embodiment, vehicle 50 is an electric vehicle (BEV: Battery Electric Vehicle) that does not have an engine (internal combustion engine), but may also be a plug-in hybrid electric vehicle (PHEV: Plug-in Hybrid Electric Vehicle). Battery 55 is configured, for example, by a secondary battery such as a lithium-ion battery or a nickel-metal hydride battery.

[0023] The EVSE 30 is a power supply device compatible with V2G (Vehicle to Grid) (or V2H (Vehicle to Home)), and charges the battery 55 with power supplied from the power grid PG, or supplies the power discharged from the battery 55 to the power grid PG.

[0024] 2 is a schematic diagram showing the configuration of each device, such as management device 20, in this embodiment. Management device 20 includes processor 21, memory 22, and communication IF (Interface) 23. Processor 21 executes programs stored in memory 22. Management device 20 communicates with vehicle 50 and EVSE 30 via communication IF 23 to exchange various data.

[0025] The vehicle 50 includes an ECU 51 , a DCM 52 , a charge / discharge port 53 , a charger / discharger 54 , a battery 55 , and a driving unit 56 .

[0026] The ECU 51 has hardware such as a processor and a memory. The ECU 51 detects the state (for example, SOC (State Of Charge)) of the battery 55 and executes charge / discharge control of the battery 55. The DCM 52 communicates with the management device 20, the EVSE 30, and the like.

[0027] The traveling drive unit 56 includes a PCU (Power Control Unit) and an MG (Motor Generator), and is configured to use the electric power stored in the battery 55 to make the vehicle 50 travel.

[0028] The vehicle 50 can charge and discharge power between the vehicle 50 and the EVSE 30. The charger / discharger 54 is electrically connected to the charge / discharge port 53 and the battery 55. The charger / discharger 54 converts power supplied from the EVSE 30 into power that can be charged into the battery 55, and charges the battery 55. The charger / discharger 54 converts power discharged from the battery 55 into power that can be charged by the EVSE 30, and supplies the power to the EVSE 30.

[0029] The EVSE 30 corresponds to a charging / discharging facility outside the vehicle 50. The EVSE 30 is equipped with a charging / discharging cable having a connector 34 at the end. When the connector 34 is connected (plugged in) to a charging / discharging port 53 of the vehicle 50, charging / discharging becomes possible between the vehicle 50 and the EVSE 30.

[0030] The EVSE 30 includes a processor 31, a memory 32, and a communication IF 33. The processor 31 executes a program stored in the memory 32. The EVSE 30 communicates with the management device 20 and the vehicle 50 via the communication IF 33 to exchange various data.

[0031] The DR request transmitted to the management device 20 includes the time period (date and time) for executing DR and the requested charge / discharge power, for example, the charge / discharge power for each 30-minute period. The management device 20 creates a power supply and demand plan (charge / discharge plan) for each DER (battery 55) based on the DR request.

[0032] A user who owns a vehicle 50 that has signed a contract with an aggregator can receive a predetermined incentive by charging or discharging in accordance with a request from the aggregator. Furthermore, a user who has agreed to comply with the request but has not done so will be subject to a predetermined penalty (penalty) under the contract, or will not be able to receive the incentive.

[0033] 3 is a flowchart showing an example of processing executed by management device 20 and EVSE 30. The processing executed by management device 20 is executed periodically (for example, every 100 msec). The processing executed by EVSE 30 is executed when a connection with vehicle 50 is detected.

[0034] The management device 20 creates a power supply and demand plan in response to a DR request from an electric power company (such as a retail electricity supplier) and issues commands to multiple EVSEs 30 connected to it. Based on the power supply and demand plan, the management device 20 manages a group of vehicles scheduled for charging and discharging in each EVSE 30 as a group of candidate vehicles for charging and discharging. The group of candidate vehicles for charging and discharging corresponds to an example of a "group of candidate vehicles" in the present disclosure.

[0035] When processing on the EVSE 30 side starts, the EVSE 30 determines in S21 whether an EVSE error has been detected. Hereinafter, an "EVSE error" refers to an abnormality (error) that makes charging and discharging impossible when charging and discharging between the power grid PG and the battery 55 via the EVSE 30. In this embodiment, an EVSE error is an error that occurs in the vehicle 50. The EVSE error is detected in the EVSE 30.

[0036] If the EVSE 30 determines that an EVSE error has been detected (YES in S21), it transmits error information to the management device 20 (S22) and proceeds to S23. On the other hand, if the EVSE 30 does not determine that an EVSE error has been detected (NO in S21), it returns to S21. This repeats the process of S21 until an EVSE error is detected. Note that the EVSE 30 may terminate this process when the connection with the vehicle 50 is released.

[0037] The situation when an error occurs will be specifically described below. Figures 4 and 5 are diagrams showing an example of a charge / discharge vehicle and a group of charge / discharge candidate vehicles when an error occurs.

[0038] As shown in Fig. 4, a vehicle 50a (also referred to as "vehicle A") is currently connected to the EVSE 30 for charging and discharging. Here, the vehicle connected to the EVSE 30 for charging and discharging is referred to as a "charge-discharge vehicle." The charge-discharge vehicle corresponds to an example of a "target vehicle" in the present disclosure.

[0039] Furthermore, it is assumed that after vehicle A, vehicle 50b (also referred to as "vehicle B") is scheduled to be charged or discharged (order 1). After vehicle B, vehicle 50c (also referred to as "vehicle C") is scheduled to be charged or discharged (order 2). After vehicle C, vehicle 50d (also referred to as "vehicle D") is scheduled to be charged or discharged (order 3).

[0040] The group of candidate vehicles for charging / discharging refers to the group of vehicles (vehicles B, C, and D) that form this queue. Each vehicle in the group of candidate vehicles for charging / discharging has a predetermined order of connection to the EVSE 30, and after vehicle A, vehicles B, C, and D are scheduled to be charged / discharged in this order (orders 1 to 3).

[0041] In the example of FIG. 4, vehicle A, which is a charge / discharge vehicle, is in a state where it can charge / discharge with the EVSE 30. However, an error has occurred in vehicle A. For example, assume that the temperature of the battery 55 of vehicle A becomes high, and an error has occurred to prevent the battery 55 from overheating. In this case, the EVSE 30 transmits error information regarding the error to the management device 20, such as indicating that an error has occurred in vehicle A and that the type of error is "battery overheating" (hereinafter also referred to as "error A") (S22).

[0042] Returning to FIG. 3, when processing on the management device 20 side starts, the management device 20 determines in S11 whether or not an EVSE error has been detected in the EVSE 30. If the management device 20 determines that an EVSE error has been detected (i.e., if error information has been received from the EVSE 30) (YES in S11), the processing proceeds to S12. On the other hand, if the management device 20 does not determine that an EVSE error has been detected (NO in S11), the processing on the management device 20 side ends.

[0043] In S12, management device 20 excludes vehicle 50 that was connected to EVSE 30 when the EVSE error occurred (hereinafter referred to as the "error-occurring vehicle") from targets for charge / discharge control. This ends the process of executing charge / discharge between the error-occurring vehicle and EVSE 30.

[0044] In S13, the management device 20 executes a process of checking the type of error in the vehicle in which the error has occurred (checking the error content). In S14, the management device 20 estimates the predicted recovery time of the vehicle in which the error has occurred according to the type of error (estimating the predicted recovery time).

[0045] For example, if the type of error is "Error A (battery overheating)", the predicted recovery time is estimated to be "time X1", if the type of error is "Error B", the predicted recovery time is estimated to be "time X2", and if the type of error is "Error C", the predicted recovery time is estimated to be "-".

[0046] In the case of error A (battery overheating), the time X1 required for the battery 55 to cool down to a predetermined temperature at which it can be charged and discharged again is calculated as the predicted recovery time. Error B is also an error that can be resolved over time. The time X2 estimated to resolve error B over time is calculated as the predicted recovery time for error B.

[0047] Error C is, for example, a hardware failure that occurs in the vehicle 50. For example, if the error is not resolved even after time has passed, such as when the battery 55 or the like is physically damaged, it is determined that recovery is impossible, and the predicted recovery time is not calculated (the predicted recovery time is "-").

[0048] In the example of Fig. 4, vehicle A is excluded from the charge / discharge vehicles. In the confirmation process, an error occurs in vehicle A, and information such as the type of error being "battery overheating (error A)" is set. In this case, it is determined that recovery is possible, and the "predicted recovery time" is calculated as "X1" hours after which the battery 55 will be usable again.

[0049] In this way, when an EVSE error is detected in the EVSE 30, the management device 20 estimates the predicted recovery time until recovery from the error according to the type of error.

[0050] Thereafter, in S15 to S17, a candidate vehicle replacement process is executed. In S15, the management device 20 selects a new charge / discharge vehicle from the group of charge / discharge candidate vehicles. In this way, when an error is detected, the management device 20 selects a vehicle to be connected to the EVSE 30 in place of the charge / discharge vehicle from the group of charge / discharge candidate vehicles used in the power supply and demand plan for the EVSE 30.

[0051] If the management device 20 determines that recovery is possible (YES in S16), it adds the error-occurring vehicle (charge / discharge vehicle) to the group of charge / discharge candidate vehicles based on the predicted recovery time (S17), and proceeds to S18. On the other hand, if the management device 20 determines that recovery is not possible (NO in S16), it proceeds to S18 as is.

[0052] The following explanation will be given with reference to Figure 5. The management device 20 selects vehicle B, which is scheduled to be charged or discharged next, from the queue of vehicles B, C, and D, which are the group of candidate vehicles for charging or discharging, as a new vehicle for charging or discharging, and sets it as the vehicle for charging or discharging. As a result, the group of candidate vehicles for charging or discharging becomes vehicles C and D.

[0053] Vehicle A, which is a charge / discharge vehicle (vehicle in which an error has occurred), is determined to be recoverable and is therefore added to the group of charge / discharge candidate vehicles. When adding a charge / discharge vehicle to the group of charge / discharge candidate vehicles, the management device 20 determines the order in which the charge / discharge vehicles are to be connected to the EVSE 30 based on the predicted recovery time.

[0054] Specifically, the management device 20 determines the order of the group of charge / discharge candidate vehicles so that the time to complete charge / discharge is shortest when all of the charge / discharge candidate vehicles have been charged / discharged. In this example, it is assumed that the time required to complete charge / discharge of vehicles B to D is less than X1 hours. In this case, because the charge / discharge of vehicles B to D will be completed before the X1 hours have elapsed, when vehicle A becomes available for charge / discharge, vehicle A is added after vehicle D in the group of charge / discharge candidate vehicles. As a result, the order of the group of charge / discharge candidate vehicles will be vehicles C, D, and A.

[0055] On the other hand, for example, if the charging / discharging start time for vehicle D is set to be quite late, the group of candidate vehicles for charging / discharging may be set in the order of vehicles C, A, and D. For example, this applies to cases where, even if charging / discharging of three vehicles is completed in the order of vehicles B, C, and A, the charging / discharging start time for vehicle D will not be reached.

[0056] In this way, the management device 20 sets the charge / discharge vehicle equipped with the battery 55 that was connected to the EVSE 30 when the error was detected as the vehicle to be used in the power supply and demand plan after the predicted recovery time in the EVSE 30 has elapsed.

[0057] 3, in S18, management device 20 transmits the vehicle change information and ends the processing on the side of management device 20. In the above example, information is transmitted to EVSE 30, such as that the charge / discharge vehicle is "vehicle B," the group of charge / discharge candidate vehicles is "vehicles C, D, and A," and the predicted recovery time for vehicle A is "X1 hours."

[0058] On the other hand, when it is determined that the vehicle change information has been received (YES in S23), the EVSE 30 resumes the process of performing charging and discharging based on the vehicle change information (S24), and ends the process on the EVSE 30 side. In the above example, the EVSE 30 resumes the process of performing charging and discharging that was interrupted due to the occurrence of an error in vehicle A. In this case, the EVSE 30 sets vehicle B as the charging and discharging vehicle, and when vehicle B is connected to the EVSE 30, charging and discharging are performed between the EVSE 30 and vehicle B.

[0059] As described above, according to the present embodiment, the management system 1 includes the EVSE 30, multiple batteries 55, and the management device 20. The management device 20 is a device that manages a power supply and demand plan for multiple batteries 55, each of which can be electrically connected to the power grid PG via the EVSE 30. The management device 20 includes a processor 21 and a memory 22 that stores a program executable by the processor 21. When an error that disables charging or discharging is detected, the processor 21 estimates a predicted recovery time until recovery from the error depending on the type of error. The processor 21 sets a charging / discharging vehicle equipped with a battery 55 that was connected to the EVSE 30 when the error was detected as a vehicle to be used in the power supply and demand plan for the EVSE 30 after the predicted recovery time has elapsed.

[0060] According to this configuration, even if an abnormality that makes charging and discharging impossible is detected, the charging / discharging vehicle equipped with the battery 55 that was connected to the EVSE 30 at the time of the abnormality detection is incorporated into the power supply and demand plan based on the predicted recovery time from the abnormality. In this way, since the power supply and demand plan is formulated taking into account the recovery time from the abnormality, it is possible to prevent a shortage of the planned power supply and demand for the power grid PG. Furthermore, since the vehicle user can supply and demand power according to the contract, penalty fees can be avoided and supply and demand can be stably adjusted according to the contract.

[0061] The error that makes charging and discharging impossible in the EVSE 30 occurs in the charging / discharging vehicle. As a result, the power supply and demand plan is formulated including the charging / discharging vehicle in which the abnormality occurred, so that it is possible to prevent a shortage of the planned power supply and demand amount for the power grid PG.

[0062] When an error is detected, the processor 21 selects a vehicle to be connected to the EVSE 30 instead of the charge / discharge vehicle from the group of charge / discharge candidate vehicles used in the power supply and demand plan of the EVSE 30. The processor 21 adds the charge / discharge vehicle to the group of charge / discharge candidate vehicles. In this way, the processor 21 selects the next vehicle to be connected to the EVSE 30 from the group of charge / discharge candidate vehicles and adds the charge / discharge vehicle in which an abnormality has been detected to the group of charge / discharge candidate vehicles, so that the group of charge / discharge candidate vehicles can be generated taking into account the recovery time from the abnormality.

[0063] A connection order to the EVSE 30 is determined for each vehicle in the group of candidate vehicles for charging and discharging. When adding a vehicle for charging and discharging to the group of candidate vehicles for charging and discharging, the processor 21 determines the connection order of the vehicle for charging and discharging to the EVSE 30 based on the predicted restoration time. In this way, the connection order of a vehicle for charging and discharging in which an abnormality has been detected in the group of candidate vehicles for charging and discharging to the EVSE 30 is determined based on the predicted restoration time, so that charging and discharging to the power grid PG can be performed with minimal unnecessary waiting time.

[0064] In the present embodiment, the EVSE error has been described as an error that occurs in the vehicle 50. However, the EVSE error is not limited to this, and may be any error that is detected in the EVSE 30 and that disables charging and discharging between the power grid PG and the battery 55. For example, the EVSE error may be an error that occurs due to some kind of malfunction on the EVSE 30 side. If it is predicted that the error will be restored after X1 hours, the power supply and demand plan can be adjusted so that the vehicle that was connected to the EVSE 30 when the error occurred is reconnected after X1 hours have elapsed.

[0065] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present disclosure is defined by the claims, not by the description of the above embodiments, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0066] 1 Management system, 20 Management device, 21, 31 Processor, 22, 32 Memory, 23, 33 Communication IF, 30 EVSE, 34 Connector, 50, 50a to 50d Vehicle, 51 ECU, 52 DCM, 53 Charging / discharging port, 54 Charger / discharger, 55 Battery, 56 Travel drive unit, PG power system.

Claims

1. A management device that manages a power supply and demand plan for a plurality of power adjustment resources, each of which can be electrically connected to a power grid via a charging / discharging facility, comprising: a processor; a memory that stores a program executable by the processor; The processor: When an abnormality that makes charging or discharging impossible is detected, a predicted recovery time until recovery from the abnormality is estimated according to the type of the abnormality; A management device sets a target vehicle equipped with a power adjustment resource that was connected to the charging / discharging equipment at the time the abnormality was detected as a vehicle to be used in the power supply and demand plan for the charging / discharging equipment after the predicted recovery time has elapsed.

2. The management device according to claim 1 , wherein the abnormality occurs in the target vehicle.

3. The processor: When the abnormality is detected, a vehicle to be connected to the charging / discharging facility in place of the target vehicle is selected from a group of candidate vehicles used in the power supply and demand plan for the charging / discharging facility; The management device according to claim 2 , further comprising: adding the target vehicle to the group of candidate vehicles.

4. An order of connection to the charging / discharging facility is determined for each vehicle in the group of candidate vehicles, The management device according to claim 3 , wherein the processor, when adding the target vehicle to the group of candidate vehicles, determines an order in which the target vehicle is to be connected to the charging / discharging equipment based on the predicted recovery time.

5. Charging and discharging equipment, a plurality of power regulation resources, each of which is electrically connectable to a power grid via the charging / discharging facility; a management device that manages a power supply and demand plan for the plurality of power adjustment resources; The management device When an abnormality that makes charging or discharging impossible is detected, a predicted recovery time until recovery from the abnormality is estimated according to the type of the abnormality; A management system that sets a target vehicle equipped with a power adjustment resource that was connected to the charging / discharging equipment when the abnormality was detected as a vehicle to be used in the power supply and demand plan for the charging / discharging equipment after the predicted recovery time has elapsed.

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