Operation feasibility determination device and operation feasibility determination method

Abstract

Provided is a device for determining the feasibility of operation, based on an operation plan, of a storage battery, the device comprising: a simulation unit for simulating at least one of the state of charge, temperature, and charging / discharging current of the storage battery when a charging / discharging operation is performed in the storage battery according to the contents of the operation plan; a determination unit for determining the feasibility of operation of the storage battery according to the operation plan, using, as determination target indexes, a result of the simulation and a setting value of a charging / discharging output for each unit time segment described in the operation plan; and a modification unit capable of modifying the operation plan when it is determined that the operation is not feasible. When at least one of the determination target indexes does not fall within an allowable range, it is determined that the operation is infeasible, and the operation plan can be modified by adjusting the setting value of the charge / discharge output for each unit time segment in the operation plan determined to be infeasible. When the operation plan is modified, the operation feasibility is determined for the modified operation plan.

Description

Operation feasibility determination device and operation feasibility determination method

[0001] The present invention relates to a device for determining whether or not a storage battery can be operated based on an operation plan, and particularly to determining whether or not an operation plan is acceptable when the operation plan for a storage battery in a power storage system is created by a user of the system.

[0002] In recent years, a business model has been considered and is beginning to spread, in which power companies such as retail electricity suppliers, power generation companies, aggregators, and power consumers pay a fee to use an energy storage system consisting of storage batteries and their associated devices (controllers and auxiliary devices such as heaters and fans) managed by an energy storage company, with the aim of adjusting the supply and demand of electricity and generating profits through the buying and selling of electricity in an electricity market (for example, a wholesale electricity market, a capacity market, or an adjustment market). Examples of storage batteries include sodium-sulfur batteries (NaS batteries) and lithium-ion batteries.

[0003] A user of such a power storage system desirably operates the power storage system based on a profitable operation plan (charge and discharge plan) that makes maximum use of the performance of the storage batteries provided in the power storage system to be used, and attempts to create such an operation plan. In general, the user of the power storage system can earn higher profits by charging when electricity rates are low and discharging when electricity rates are high, so the user creates an operation plan that makes this possible and attempts to have the power storage system execute it.

[0004] On the other hand, energy storage companies are required to determine whether the operation plan created by the user can be executed for the storage batteries of the energy storage systems they manage. Because there are restrictions on the charging and discharging of storage batteries based on the state and characteristics of the storage batteries (battery temperature, depth of discharge, deterioration state, etc.), there are cases where the operation plan created by the user cannot actually be executed.

[0005] For example, in a sodium-sulfur battery (NaS battery), as overdischarge progresses, sodium polysulfide is generated on the anode side, causing a deficiency of sodium in the cathode, making subsequent charging and discharging impossible. Furthermore, as overcharge progresses, the solid electrolyte is damaged, making subsequent charging and discharging impossible (see, for example, Patent Document 1). Furthermore, if the temperature of the unit cells becomes too high, the internal pressure of each unit cell may become abnormally high, or the negative electrode active material may come into direct contact with the positive electrode active material due to damage to the solid electrolyte, causing an abnormal rise in the temperature of each unit cell, which may damage the container (see, for example, Patent Document 2).

[0006] On the other hand, in the case of lithium-ion batteries, deterioration accelerates during low-temperature charging, so charging must be prohibited or the charging power must be limited when the battery temperature drops below 0°C. Furthermore, if the battery is fully charged or discharged, the crystalline structure of the electrodes may be destroyed, causing structural deterioration.

[0007] In relation to the above, a device is already known that acquires an operation plan (charge / discharge plan) for an NaS battery, which is a type of storage battery, determines whether the battery state during the planned period is within an acceptable range, and outputs guidance related to the operation of the NaS battery (see, for example, Patent Document 3). Patent Document 3 discloses a method for calculating battery temperature and remaining capacity, and also mentions losses due to the internal resistance of the storage battery module and changes in the internal resistance over time that result in changes in charge / discharge losses.

[0008] However, Patent Document 3 does not anticipate a situation in which a power storage system managed by a power storage business operator is operated by another business operator.

[0009] Energy storage system users do not necessarily have up-to-date information about the specific (or predicted) state of the storage batteries owned by the energy storage company during the period they intend to use the system. At best, they often only know the standard operating conditions.

[0010] For example, in the aspect disclosed in Patent Document 3, if an operational plan is not adopted, a message is displayed indicating that a change is required, but no specific instructions are given as to how the change should be made.

[0011] Bidding on the electricity market may begin about two weeks before the actual supply and demand times. In such cases, users of the energy storage system are required to create an operation plan for the next two weeks. However, in the manner disclosed in Patent Document 3, it is difficult for the user to estimate when and under what conditions (temperature, charge amount) the operation plan will deviate from the constraints on the storage battery.

[0012] Furthermore, depending on the charging and discharging conditions based on the operation plan created by the user, it may not be possible to obtain the maximum profit that the user would have expected, taking into account the charging and discharging losses and the charging and discharging costs required for temperature control of the storage battery and other purposes (such as the operating power of auxiliary equipment). However, it is not easy for users to predict (estimate) such charging and discharging losses and costs.

[0013] Therefore, if a user of a power storage system were to create an operation plan that maximizes the performance of the storage battery to be used based on the disclosure of Patent Document 3, it would require a considerable amount of time and effort. Moreover, it is difficult to determine whether the created operation plan is operable with the storage battery and maximizes its performance.

[0014] In addition, with regard to the exchange of electricity between a retail electricity supplier and a pumping-storage supplier, a method in which the pumping-storage supplier determines the pumping plan received from the retail electricity supplier and the power generation plan to generate electricity using the pumping is already known (see, for example, Patent Document 4).

[0015] Patent Document 4 relates to a device that determines whether the amount of power lost due to pumped storage power generation and the amount of power generated, which is the amount of power generated corresponding to the power generation period included in the judgment period, is equal to or less than a predetermined upper limit value for the amount of pumped storage power, and whether the amount of power lost is equal to or greater than a predetermined lower limit value.

[0016] However, Patent Document 4 does not disclose or suggest anything about the operation of the storage battery.

[0017] Japanese Patent No. 5201863 Japanese Patent No. 6764368 Japanese Patent Laid-Open No. 2008-210586 Japanese Patent No. 6315117

[0018] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a device that can more appropriately determine whether or not a storage battery can be operated based on an operation plan created by a user of a storage system.

[0019] In order to solve the above problem, a first aspect of the present invention is an apparatus for determining whether or not a storage battery can be operated based on an operation plan for a predetermined period created by a user of the storage battery, the apparatus including: an acquisition unit that acquires the operation plan created by the user, the operation plan describing set values ​​of charge and discharge outputs of the storage battery for each unit time segment; a simulation unit that simulates at least one of a charging rate, a temperature, and a charge and discharge current of the storage battery when a charge and discharge operation is performed on the storage battery in accordance with the description of the operation plan acquired by the acquisition unit; a determination unit that determines whether or not the storage battery can be operated in accordance with the operation plan using the set values ​​of the charge and discharge outputs for each unit time segment described in the operation plan and a result of the simulation by the simulation unit as indicators to be determined; and a modification unit capable of modifying the operation plan when it is determined that the storage battery cannot be operated in accordance with the contents of the operation plan, wherein the determination unit determines that the storage battery can be operated in accordance with the operation plan when all of the indicators to be determined are within a predetermined tolerance range, and determines that the storage battery cannot be operated in accordance with the operation plan when at least one of the indicators to be determined is not within the tolerance range, and the modification unit is capable of modifying the operation plan by adjusting the setting value of the charge / discharge output for each unit time segment in the operation plan that the determination unit has determined to be unsuccessful, and when the operation plan is modified by the modification unit, the determination unit determines whether the storage battery can be operated in accordance with the modified operation plan.

[0020] A second aspect of the present invention is an operation feasibility determination device relating to the first aspect, characterized in that the operation plan describes the priority for each unit time segment and the range in which the setting value can be changed in each unit time segment when correction is made by the correction unit, and the correction unit corrects the operation plan based on the priority and the range in which the setting value can be changed.

[0021] A third aspect of the present invention is an operational feasibility determination device according to the first aspect, comprising a display unit capable of displaying at least the results of the simulation, and an input unit capable of allowing an operator to perform predetermined input operations on the results of the simulation displayed on the display unit, wherein the correction unit enables the operator to correct the operational plan by operating the input unit to adjust the setting values ​​of the charge / discharge output for each unit time segment in the results of the simulation displayed on the display unit.

[0022] A fourth aspect of the present invention is an operation feasibility determination device relating to any of the first to third aspects, characterized in that when charging / discharging operations are performed on the storage battery in accordance with the operation plan for which the determination unit has determined that operation is possible, charge / discharge information is generated which is at least one of the amount of charging energy, charge / discharge loss, and charge / discharge efficiency of the storage battery.

[0023] A fifth aspect of the present invention is an operation feasibility determination device relating to any of the first to third aspects, characterized in that, when the charging / discharging operation of the storage battery in accordance with the operation plan that has been determined by the determination unit to be operable is carried out by the user paying a specified usage fee to the storage battery business operator that owns the storage battery, information is generated regarding fluctuations in the usage fee resulting from the operation plan being modified by the modification unit.

[0024] A sixth aspect of the present invention is an operation feasibility determination device relating to any of the first to third aspects, characterized in that the temperature of the storage battery is controlled by a heater and a fan, and the operation of the heater and the fan is also included in the simulation in the simulation unit.

[0025] A seventh aspect of the present invention is a method for determining whether or not a storage battery can be operated based on an operation plan for a predetermined period created by a user of the storage battery, the method comprising: an acquisition step of acquiring the operation plan created by the user, the operation plan describing set values ​​of charge and discharge outputs of the storage battery for each unit time segment; a simulation step of simulating at least one of a charging rate, a temperature, and a charge and discharge current of the storage battery when charge and discharge operations are performed on the storage battery in accordance with the description of the operation plan acquired in the acquisition step; a determination step of determining whether or not the storage battery can be operated in accordance with the operation plan using the set values ​​of the charge and discharge outputs for each unit time segment described in the operation plan and a result of the simulation in the simulation step as indicators to be determined; and the determination step. and a correction process for correcting the operation plan if it is determined in the process that operation of the storage battery in accordance with the contents of the operation plan is not possible, wherein in the determination process, if all of the indicators to be determined are within a predetermined tolerance range, it is determined that operation of the storage battery in accordance with the operation plan is possible, and if at least one of the indicators to be determined is not within the tolerance range, it is determined that operation of the storage battery in accordance with the operation plan is not possible, and in the correction process, the operation plan determined to be not possible in the determination process is corrected by adjusting the setting value of the charge / discharge output for each unit time segment, and if the operation plan is corrected in the correction process, the determination process is performed again for the corrected operation plan.

[0026] An eighth aspect of the present invention is a method for determining whether operation is possible according to the seventh aspect, characterized in that the operation plan describes the priority for each unit time segment and the range in which the setting values ​​for each unit time segment can be changed when making corrections in the correction process, and in the correction process, the operation plan is corrected based on the priority and the range in which the setting values ​​can be changed.

[0027] A ninth aspect of the present invention is a method for determining whether operation is possible according to the seventh aspect, characterized in that in the correction step, the setting value of the charge / discharge output for each unit time segment in the results of the simulation displayed on a predetermined display means is adjusted by operating a predetermined input means, thereby correcting the correction of the operation plan.

[0028] A tenth aspect of the present invention is a method for determining whether operation is possible according to any one of the seventh to ninth aspects, characterized in that it further comprises a charge / discharge information generation step of generating charge / discharge information, which is at least one of the amount of charging energy, charge / discharge loss, and charge / discharge efficiency of the storage battery, when a charge / discharge operation is performed on the storage battery in accordance with the operation plan determined to be possible for operation in the determination step.

[0029] An eleventh aspect of the present invention is a method for determining whether or not operation is possible according to any of the seventh to ninth aspects, characterized in that charging and discharging operations in the storage battery in accordance with the operation plan determined to be operable in the determination process are carried out by the user paying a specified usage fee to the energy storage business operator that owns the storage battery, and the method further comprises a fee fluctuation information generation process for generating information regarding fluctuations in the usage fee resulting from the operation plan being modified in the modification process.

[0030] A twelfth aspect of the present invention is a method for determining whether operation is possible according to any of the seventh to ninth aspects, characterized in that the temperature of the storage battery is controlled by a heater and a fan, and the operation of the heater and the fan is also included in the simulation in the simulation process.

[0031] According to the first to twelfth aspects of the present invention, it is possible to avoid situations where charging and discharging operations according to an operation plan cannot be carried out due to the state of the storage battery or the like.

[0032] In particular, according to the second and eighth aspects, the workload on the operator is reduced, and the operation plan for the storage battery can be revised more reliably and efficiently.

[0033] In particular, according to the fourth and tenth aspects, the accuracy of revenue calculation for users of a storage system equipped with a storage battery is improved compared to when revenue is calculated based on charging / discharging losses estimated from standard charging / discharging efficiency.

[0034] In particular, according to the fifth and eleventh aspects, the accuracy of profit calculations for users of storage batteries is improved, enabling more appropriate decisions to be made from a profit perspective regarding the availability of storage batteries. Furthermore, energy storage businesses can reflect variable costs that vary depending on the operational status in their usage fees, thereby achieving fairness in usage fees among users. Furthermore, it becomes possible to appropriately operate businesses in which users use energy storage systems owned by energy storage businesses.

[0035] 1 is a diagram schematically showing the exchange of power and the connection to a communication network N between an energy storage business operator A, a power generation business operator B, an energy transmission and distribution business operator C, an electricity retailer D, and a consumer E. FIG. 1 is a diagram showing the configuration of an operation plan processing device 4 in a first embodiment, together with the data handled. FIG. 2 is a diagram illustrating operation plan proposal data D1. FIG. 3 is a diagram showing the configuration of an operation feasibility determination device 1 according to a first aspect, together with the data handled. FIG. 4 is a diagram illustrating a simulation result image IM1. FIG. 5 is a diagram illustrating a correction processing display image IM2. FIG. 6 is a diagram illustrating a correction processing display image IM3. FIG. 7 is a diagram illustrating a change input table image IM5. FIG. 8 is a diagram showing the configuration of an operation feasibility determination device 1 according to a second embodiment, together with the data handled. FIG. 9 is a diagram illustrating prioritized operation plan proposal data D1α. FIG. 10 is a diagram showing the processing flow for simulating an operation plan and correcting it, which is performed in the operation feasibility determination device 1 according to the second embodiment. FIG. 11 is a diagram for explaining a first example of correction of an operation plan according to priority. FIG. 10 is a diagram for explaining a first example of a modification of an operation plan in accordance with priority. FIG. 11 is a diagram for explaining a second example of a modification of an operation plan in accordance with priority. FIG. 12 is a diagram for explaining a second example of a modification of an operation plan in accordance with priority. FIG. 13 is a diagram for explaining a menu display image IM6. FIG. 14 is a diagram for explaining a menu display image IM7.

[0036] <Overview> Figure 1 is a diagram that schematically shows the exchange of electricity and the connection to a communication network N between an energy storage business operator A, a power generation business operator B, an energy transmission and distribution business operator C, an electricity retailer D, and a consumer E, which is a common premise for each embodiment described below.

[0037] The energy storage business operator A owns an operation feasibility determination device 1, an energy storage system 2, and an operation plan management device 3. The energy storage business operator A is a business operator that provides users with the charge / discharge capacity of the storage battery 21 provided in the energy storage system 2 for a predetermined price (fee). Examples of users include a power generation business operator B, an energy transmission and distribution business operator C, and an electricity retailer D.

[0038] The storage battery 21 is, for example, a sodium-sulfur battery (NaS battery) or a lithium-ion battery. The following description will be mainly based on an example in which the storage battery 21 is a NaS battery. In this case, the power storage system 2 includes, in addition to the storage battery 21, a control device 22 for the storage battery 21, a heater 23 for heating and keeping the storage battery 21 warm, and a fan 24 for dissipating heat from the storage battery 21.

[0039] The operation feasibility determination device 1 is a device that determines whether an operation plan (charge / discharge plan) for the storage battery 21 created by a user of the storage system 2 is feasible based on the state (battery temperature, depth of discharge, deterioration state, etc.) and characteristics of the storage battery 21.

[0040] The operation plan management device 3 is a device that obtains an operation plan that can be used for the storage battery 21 from the user and causes the control device 22 provided in the storage system 2 to control the storage battery 21 and its auxiliary equipment, such as the heater 23 and fan 24, in accordance with the operation plan.

[0041] The operation feasibility determination device 1 and the operation plan management device 3 may be provided separately from the power storage system 2 .

[0042] The power generation company B is a company that generates electricity using, for example, wind power generation EG1, solar power generation EG2, biomass power generation EG3, thermal power generation EG4, nuclear power generation EG5, etc. In FIG. 1 , for simplicity of illustration, only one power generation company B is shown, but there may be multiple power generation companies B. In such a case, each power generation company B may generate electricity in one or more power generation modes. For example, there may be a power generation company B that generates electricity only through solar power generation EG2, a power generation company B that generates electricity only through thermal power generation EG4, and a power generation company B that generates electricity only through nuclear power generation EG5. Alternatively, there may be a power generation company B that generates electricity only through thermal power generation EG4 and nuclear power generation EG5, and one or more power generation companies B that generate electricity only through wind power generation EG1 and solar power generation EG2, respectively.

[0043] The power transmission and distribution business operator C is a business operator that transmits and distributes electricity between the power generation business operator B and the electricity retailer D. The electricity retailer D is a business operator that retails electricity to a large number of consumers E.

[0044] The electricity generated by the power generation company B is supplied by the electricity transmission and distribution company C to the electricity retailer D, which then supplies the electricity to the consumer E according to demand.

[0045] In addition, the energy storage provider A, the power generation provider B, the transmission and distribution provider C, and the retail electricity provider D are connected to each other via a communication network N, and data can be exchanged between them via this communication network N.

[0046] In addition, the power generation company B may also serve as the power transmission and distribution company C and also as the retail electricity company D, or the retail electricity company D may also serve as the power transmission and distribution company C.

[0047] Power generation company B, power transmission and distribution company C, and retail electricity company D use the charging and discharging capacity of the storage battery 21 in the energy storage system 2 owned by energy storage company A to adjust the supply and demand of electricity, or further, to generate revenue by buying and selling electricity in the electricity market (e.g., wholesale electricity market, capacity market, supply and demand adjustment market).

[0048] For example, when the electricity retailer D's supply and procurement of power exceeds the demand for power, it charges the storage battery 21, and conversely, when the demand for power exceeds the supply and procurement of power, it discharges the power that has been previously charged in the storage battery 21. Alternatively, it charges the storage battery 21 when the purchase price of electricity in the market is low, and discharges the storage battery 21 when the selling price of electricity is high.

[0049] The power generation company B, the power transmission and distribution company C, and the electricity retailer D each own an operation plan processing device 4 for creating an operation plan for the storage battery 21, and use the operation plan processing device 4 to create an operation plan intended to charge and discharge the storage battery 21 to be used in a desired manner. The power storage company A may also own an operation plan processing device 4.

[0050] When an operation plan is created in the operation plan processing device 4, an operation feasibility determination device 1 owned by the energy storage business operator A determines whether or not the storage battery 21 can be operated based on the operation plan. An operation plan that is determined to be inoperable is corrected as appropriate by the operation feasibility determination device 1. Similarly, when the energy storage business operator A itself owns the operation plan processing device 4, the operation feasibility determination device 1 may determine whether or not the operation plan for the storage battery 21 created by the energy storage business operator A using the operation plan processing device 4 can be operated, and may correct the plan if necessary.

[0051] When the user formally requests the energy storage business operator A to operate the storage battery 21 by transferring an operational plan (possibly after revision) that is ready for operation to the operation plan management device 3, the storage battery 21 in the energy storage system 2 performs charging and discharging operations in accordance with the operational plan.

[0052] The operation feasibility determination device 1, the operation plan management device 3, the operation plan processing device 4, and the control device 22 of the energy storage system 2 are all realized by general-purpose or dedicated computers (not shown). Each computer mainly includes a control unit including a CPU, ROM, RAM, etc.; a storage unit including a hard disk, etc.; an input unit including a mouse, keyboard, etc. that allows an operator to enter operation instructions and input data, etc.; a display unit including a display, etc.; and a communication unit that is a communication interface with the outside, all of which are not shown. In each computer, a predetermined operating program is loaded and executed by the CPU, thereby realizing various functional components of each device. Note that the display unit may be configured as a touch panel, so that it also functions as an input unit.

[0053] In addition, the functions of the operation feasibility determination device 1 and the functions of the operation plan management device 3 owned by the energy storage operator A may be realized by a single computer, or the functions of the operation plan management device 3 and the functions of the control device 22 may be realized by a single computer, or the functions of the operation feasibility determination device 1, the functions of the operation plan management device 3 and the functions of the control device 22 may be realized by a single computer.

[0054] In addition, instead of the configuration in which the energy storage business operator A owns the operation feasibility determination device 1 and the user of the energy storage system 2 owns the operation plan processing device 4, the operation feasibility determination device 1 and the operation plan processing device 4 may be installed in a data center F connected to a communication network N, and their functions may be provided as a web service.

[0055] 2 is a diagram showing the configuration of an operation plan processing device 4 according to a first embodiment of the present invention, together with the data handled. The operation plan processing device 4 includes, as functional components, a data acquisition unit 41, a data storage unit 42, a plan creation unit 43, and a plan output unit 44.

[0056] The data acquisition unit 41 is a unit that acquires the spot price forecast data DP1, the adjustment capacity price forecast data DP2, and the energy storage system standard data DB0. The data storage unit 42 is a unit that stores the data acquired by the data acquisition unit 41. The plan creation unit 43 is a unit that is responsible for creating an operation plan for the storage battery 21. The plan output unit 44 is a unit that outputs the created operation plan to the operation feasibility determination device 1 and the operation plan management device 3.

[0057] The spot price forecast data DP1 is price forecast data for electricity traded in the wholesale electricity market. The adjustment capacity price forecast data DP2 is price forecast data for electricity traded in the adjustment capacity market. The data acquisition unit 41 normally acquires the spot price forecast data DP1 and the adjustment capacity price forecast data DP2 for the next two weeks via the communication network N or by input operation by an operator.

[0058] The power storage system standard data DB0 is data on standard charge / discharge conditions (charge / discharge loss, charge / discharge efficiency, etc.) for the storage battery 21 included in the power storage system 2 that the owner of the operation plan processing device 4 intends to use. The data acquisition unit 41 acquires the power storage system standard data DB0 through an input operation by an operator of the operation plan processing device 4 or by referring to the description of a database (not shown) included in the operation plan processing device 4. Alternatively, the power storage system standard data DB0 may be acquired from the operation feasibility determination device 1.

[0059] The spot price forecast data DP1, the adjustment capacity price forecast data DP2, and the power storage system standard data DB0 are temporarily stored in the data storage unit 42.

[0060] In response to an instruction to create an operation plan from the input unit by an operator of the operation plan processing device 4, the plan creation unit 43 accepts an operation by the operator to create an operation plan for the storage battery 21. The operator creates the operation plan while appropriately referring to the spot price forecast data DP1, the adjustment capacity price forecast data DP2, and the contents of the power storage system standard data DB0.

[0061] In this embodiment, a day (0:00 to 24:00) is divided into 30-minute unit time segments, also called "frames," and an operation plan is created by an operator setting (inputting) the charge / discharge output for each of the 48 frames each day for two weeks.

[0062] 3 is a diagram illustrating proposed operation plan data D1 created in this manner. Column R1 lists the date, column R2 lists the frame number, and column R3 lists the charge / discharge output as "set output P (kW)." Note that frames with positive numbers in column R3 are planned to be discharged, and frames with negative numbers are planned to be charged.

[0063] The proposed operation plan data D1 describing the created operation plan is output from the plan output unit 44 to the operation feasibility determination device 1.

[0064] <Operation feasibility determination device> Next, the configuration of the operation feasibility determination device 1 according to the first embodiment of the present invention and the processing content of the device will be described. In general terms, in this embodiment, it is assumed that the operator of the operation feasibility determination device 1 manually modifies the operation plan.

[0065] (Device Overview) FIG. 4 is a diagram showing the configuration of the operation feasibility determination device 1 according to the first embodiment, together with the data handled.

[0066] The operation feasibility determination device 1 according to this embodiment mainly includes, as functional components, an operation plan acquisition unit 11, an operation plan simulation unit 12, and an operation plan determination processing unit 13. In addition, an accompanying processing unit 14 may be included.

[0067] The operation plan acquisition unit 11 is a component that acquires the operation plan proposal data D1 created in the operation plan processing device 4 and stores it in a storage unit (not shown).

[0068] The operation plan simulation unit 12 is a part that, in response to an execution instruction from the input unit by the operator of the operation feasibility determination device 1, executes a simulation of the charging and discharging operation of the storage battery 21 in accordance with the operation plan described in the operation plan proposal data D1 acquired by the operation plan acquisition unit 11, and generates simulation result data D2 that describes the results. In addition, if the operation plan that was the subject of the simulation is modified by the operation plan determination processing unit 13, the operation plan simulation unit 12 re-executes the simulation based on the modified operation plan.

[0069] The operation plan determination processing unit 13 is a part that performs the following processes: determining whether or not the storage battery 21 can be operated based on the results of the simulation in the operation plan simulation unit 12; allowing the operator to modify the operation plan that was the subject of the simulation based on the simulation results; and outputting the determination results of the operation plan to the operation plan processing device 4 from which the operation plan was obtained.

[0070] The results of the simulation performed by the operation plan simulation unit 12, the judgment results based on the results, and a processing screen for correction are displayed on a display unit (not shown) of the operation feasibility judgment device 1 by the operation plan judgment processing unit 13. The operator can correct the operation plan by operating an input unit (not shown) while visually checking the display unit.

[0071] If the operation plan that was the subject of the simulation is operable as is, the operation plan determination processing unit 13 outputs determination result report data D3 that describes this and that includes simulation result data D2 to the operation plan processing device 4. Note that instead of or in parallel with outputting the determination result report data D3 to the operation plan processing device 4, the determination result report data D3 may be sent to a computer or other terminal owned by the business operator that created the operation plan that was the subject of the simulation.

[0072] On the other hand, if the operator modifies an operation plan that was determined in the simulation to be inoperable as is to make it operable, the operation plan determination processing unit 13 generates modified operation plan data D3α that describes the modified operation plan, which is the operation plan after the modification. Then, the operation plan determination processing unit 13 outputs to the operation plan processing device 4 determination result report data D3 that describes that the original operation plan needs to be modified and that includes the modified operation plan data D3α as a part.

[0073] If the operator of the operation feasibility determination device 1 does not make any corrections or aborts the correction midway because it is determined that the storage battery 21 cannot be operated no matter how the operation plan is corrected, the operation plan determination processing unit 13 outputs determination result report data D3 indicating that the simulation has been aborted. If the correction is aborted, NG corrected operation plan data D3β describing the operation plan after the final correction process may be output to the operation plan processing device 4 as part of the determination result report data D3.

[0074] The associated processing unit 14 is a unit that creates associated information (associated information) when there is information to be output together with the simulation results of the operation plan and the revised operation plan. The associated processing unit 14 generates associated data D4 that describes the associated information. Note that the creation of the associated information and the associated data D4 is optional. An example of the associated information is information regarding income and expenditure when the operation plan is implemented. The associated data D4 is output to the operation plan processing device 4 together with the judgment result report data D3.

[0075] (Simulation of operation plan) Specifically, the simulation in the operation plan simulation unit 12 is a process of predicting the state of charge (SOC) of the storage battery 21 and the temperature (battery temperature) of the storage battery 21 for each frame described in the operation plan when charging and discharging operations are performed in accordance with the set output described in the operation plan, and determining whether the predicted charging and discharging power and battery state (storage rate and battery temperature) for each frame fall within an allowable range determined based on the description in the storage battery state data DB1.

[0076] When performing the simulation, the operation plan simulation unit 12 obtains battery status data DB1 from the control device 22, which indicates the state of the battery 21 (battery temperature, depth of discharge, deterioration state, etc.) and the constraints on operation (upper and lower limits of battery temperature, etc.) necessary for the execution of the simulation, and refers to the description contents.

[0077] Furthermore, the simulation in the operation plan simulation unit 12 may also include the operation of the heater 23 and the fan 24, which are auxiliary devices of the storage battery 21. In this case, it becomes possible to simulate the case where the storage battery 21 is operated while controlling the heater 23 and the fan 24 so as to minimize the charge / discharge loss.

[0078] In addition, when charging and discharging operations of the storage battery 21 based on different operation plans are performed continuously, the state of the storage battery 21 at the end of the charging and discharging operation based on the operation plan, which is predicted from the immediately previous operation plan, may also be described in the storage battery state data DB1 and used for simulation.

[0079] After the simulation, the simulation result data D2 generated by the operation plan simulation unit 12 includes, in addition to the judgment result (evaluation result) for the operation plan described above, at least the set value for the output of the storage battery 21 for each frame when charging and discharging operations are performed according to the set output described in the operation plan, and the predicted values ​​for the state of charge (SOC) and battery temperature of the storage battery 21 for each frame during the operation period obtained by the simulation.

[0080] If the simulation results show that the charge / discharge power, charging rate, and battery temperature (hereinafter collectively referred to as the indices to be determined) for all frames are within the allowable ranges, the operation plan determination processing unit 13 determines that the operation plan that was the subject of the simulation is "operable." An operation plan that is determined to be "operable" is expected to be able to be implemented as is in the storage battery 21.

[0081] On the other hand, if there is a frame that does not fall within the allowable range for at least one of the target indices, the operation plan determination processing unit 13 determines that the operation plan that was the subject of the simulation is "unoperable." An operation plan that is determined to be "unoperable" cannot be applied to the operation of the storage battery 21 as is, and therefore requires modification (revision).

[0082] Even if a situation essentially corresponds to "inoperable," if certain requirements are met, the operation plan determination processing unit 13 may determine the situation as "expected to be operable" on the basis that it is expected that the operation plan can be implemented in the storage battery 21 almost according to the operation plan. For example, a case can be assumed in which the battery temperature momentarily exceeds the upper limit value by a small amount.

[0083] Furthermore, when making the determination, a criterion based on constraints on the control of the heater 23 and the fan 24 , which are auxiliary devices of the storage battery 21 , may be further set.

[0084] FIG. 5 is a diagram illustrating a simulation result image IM1, which is an example of a simulation result display screen that the operation plan determination processing unit 13 causes to be displayed on the display unit based on the simulation result data D2 after the execution of the simulation.

[0085] The simulation result image IM1 displays an overview window W1, a legend window W2, an overall output window W3, an enlarged output window W4, a charging rate window W5, a battery temperature window W6, a back button BT1, and a done button BT2.

[0086] The overview window W1 displays the file name (simulation file name) of the operation plan that was the subject of the simulation, the period that was the subject of the simulation (evaluation period), and the simulation results (evaluation results).

[0087] The legend window W2 shows three types of explanations for the simulation results (evaluation results) shown in the summary window W1: "◎ - Expected to be able to implement as planned," "○ - Expected to be able to implement almost as planned," and "× - Plan review recommended." These correspond to the judgments of "operational," "expected to be operational," and "not operational," respectively.

[0088] The overall output window W3 displays a graph (charge / discharge graph) showing fluctuations in the charge / discharge output of the storage battery 21 for the entire target period of the operation plan based on the description of the proposed operation plan data D1. In Fig. 5, a charge / discharge graph for 14 days from November 1 to 14, 2023 is shown.

[0089] The overall output window W3 also displays a pair of range setting slide bars SD for setting the display target periods in the enlarged output window W4, the charging rate window W5, and the battery temperature window W6. The position and spacing of the pair of range setting slide bars SD can be adjusted by the operator operating an input unit (not shown) (for example, by dragging the mouse).

[0090] If the simulation results indicate that the operation plan is not operational, a transition button BT0 to a correction screen that also displays the problem is displayed near the frame of the charge / discharge graph shown in the overall output window W3 that is the basis for the judgment that the operation plan is not operational. Furthermore, a predetermined range (e.g., one day) that includes the frame is set as the initial position of a pair of range setting slide bars SD. If there are multiple applicable ranges, the earliest range is set as the initial position.

[0091] The enlarged output window W4 displays a partial output profile PFa1, which is a partially enlarged graph of the charge / discharge graph displayed in the overall output window W3 for the display target period set by the operator by adjusting the position and gap of a pair of range setting slide bars SD.

[0092] The charging rate window W5 displays a partial charging rate profile PFb1, which is a graph of the charging rate for the same display period as the partial enlarged graph displayed in the enlarged output window W4.

[0093] The battery temperature window W6 displays a partial battery temperature profile PFc1, which is a graph of the battery temperature for the same display period as the partial enlarged graph displayed in the enlarged output window W4.

[0094] In addition, the back button BT1 is a button that is pressed to return from the simulation result display screen to the plan input screen (not shown), which is the screen that is displayed when the simulation starts, and the complete button BT2 is a button that is pressed to end the simulation.

[0095] 5, the partial output profile PFa1 shown in the enlarged output window W4 and the partial battery temperature profile PFc1 shown in the battery temperature window W6 confirm that there is an over-temperature portion P1 where the battery temperature exceeds the upper limit by up to 10°C just before the end of discharge P0, which is set to take place between 14:00 and 22:00 on November 5, 2023. The operation plan simulation unit 12 then determines that the operation plan that was the subject of the simulation is "unoperable," and the summary window W1 displays "x" and the message "Battery temperature exceeds 10°C."

[0096] (Modification of operation plan) When an operator visually sees that an "X" is displayed in the overview window W1 of the simulation result display screen, as in the simulation result image IM1, the operator will usually press the transition button BT0, for example, by clicking with the mouse, in order to modify the operation plan.

[0097] When the transition button BT0 is pressed, the operation plan determination processing unit 13 responds to the pressing and displays an operation plan correction processing screen on the display unit. More specifically, at the time the transition button BT0 is pressed, a correction processing screen is displayed on the display unit, with the range set by the pair of range setting slide bars SD as the target of the correction processing.

[0098] FIG. 6 is a diagram illustrating a display image (correction processing display image) IM2 of the correction processing screen that the operation plan determination processing unit 13 causes to be displayed on the display unit.

[0099] The correction process display image IM2, like the simulation result image IM1, displays an enlarged output window W4, a charging rate window W5, and a battery temperature window W6. In addition, a toggle switch TS1, a recalculation button BT3, a discharge output change button BT4, a discharge time change button BT5, a change confirmation button BT6, and a change cancellation button BT7 are also displayed.

[0100] The toggle switch TS1 is a switch for selecting a method for correcting the simulated operation plan. Specifically, two options, "manual setting" and "automatic setting," are exclusively selectable.

[0101] "Manual setting" is selected when the operator operates the input unit to change and input the setting output values ​​for each frame set in the operation plan.

[0102] When "Manual Setting" is selected, pressing the recalculation button BT3 causes the screen to transition from the correction processing display image IM2 to an input screen for setting output.

[0103] "Automatic setting" is selected when the numerical value of the setting output of each frame set in the operation plan is changed by the operation plan determination processing unit 13 in response to a change instruction operation performed by the operator on the correction processing screen.

[0104] If "automatic setting" is selected, either the discharge output change button BT4 or the discharge time change button BT5 is pressed depending on the change method.

[0105] The Confirm Changes button BT6 is pressed when confirming the revised operation plan. When the Confirm Changes button BT6 is pressed, the operation plan judgment processing unit 13 generates revised operation plan data D3α that describes the latest revised operation plan. When the Confirm Changes button BT6 is pressed, the display screen on the display unit returns to the plan input screen that was displayed when the simulation started.

[0106] The Cancel Change button BT7 is pressed when the modification of the operation plan is to be stopped. When the Cancel Change button BT7 is pressed, the display screen on the display unit also returns to the plan input screen, which is the screen at the start of the simulation.

[0107] 7 is a diagram showing a correction processing display image IM3, which is an example of the correction processing screen when the operation plan is changed in response to selecting "automatic setting" with the toggle switch TS1 on the correction processing screen and pressing the discharge output change button BT4. Note that the dashed line L1 is a virtual line added for ease of understanding and is not actually displayed on the correction processing screen.

[0108] When the discharge output change button BT4 is pressed, the operator can increase or decrease the set output for any time range (frame range) of the partial output profile PFa1 shown in the enlarged output window W4 of the correction processing screen by appropriately operating the input unit of the operation feasibility determination device 1. This is realized by uniformly multiplying the set output for frames belonging to the time range targeted for correction by the operator, among the set outputs for each frame described in the proposed operation plan data D1, by an increase / decrease rate according to the operator's operation on the screen.

[0109] When the operator increases or decreases the set output in this manner, the operation plan simulation unit 12 corrects the simulation results of the state of charge and battery temperature accordingly. The results of such correction are reflected in the display contents in the state of charge window W5 and the battery temperature window W6.

[0110] 7 , the partial output profile PFa1 is changed to the partial output profile PFa2 by reducing the set output power in the range from 14:00 to 22:00 on November 5, 2023 (16 frames in total) as indicated by the arrow AR1 in the enlarged output window W4. As a result of this change, the partial charging rate window W5 displays a partial charging rate profile PFb2 in which the charging rate in the range corresponding to the partial charging rate profile PFb1 has been changed as indicated by the arrow AR2. Furthermore, the battery temperature window W6 displays a partial battery temperature profile PFc2 in which the battery temperature in the range corresponding to the partial battery temperature profile PFc1 has been changed as indicated by the arrow AR3.

[0111] In the partial battery temperature profile PFc2, the battery temperature is below the upper limit. Furthermore, there is no particular problem with the partial state-of-charge profile PFb2. In this case, the operation plan determination processor 13 determines that the revised operation plan is "operable."

[0112] Therefore, when the Confirm Change button BT6 is pressed on the correction processing screen in this state, the summary window W1 of the simulation result screen (not shown), which is displayed in place of the correction processing display image IM3, displays "◎" indicating that the corrected operation plan is in an "operational" state. At this time, the overall output window W3 displays the corrected charge / discharge graph, but the transition button BT0 is not displayed. Note that the enlarged output window W4, the charging rate window W5, and the battery temperature window W6 display information according to the current positions and ranges of the pair of range setting slide bars SD.

[0113] Furthermore, when the completion button BT2 displayed on the simulation result screen in this state is pressed, the operation plan determination processing unit 13 generates modified operation plan data D3α in which the original operation plan is changed to the settings in the partial output profile PFa2.

[0114] 8 is a diagram showing a correction processing display image IM4, which is an example of the correction processing screen when the operation plan is changed in response to selecting "automatic setting" with the toggle switch TS1 on the correction processing screen and pressing the discharge time change button BT5. Note that the dashed line L2 is a virtual line added for ease of understanding, and is not actually displayed on the correction processing screen.

[0115] When the discharge time change button BT5 is pressed, the operator can operate the input unit of the operation feasibility determination device 1 as appropriate to allow an increase or decrease in the set time (the number of frames set for discharge or charge) of any discharge or charge of the partial output profile PFa1 shown in the enlarged output window W4 of the correction processing screen. When the operator allows an increase or decrease in the set time in this manner, the operation plan simulation unit 12 responds by increasing or decreasing the discharge or charge time and changing the simulation results of the charging rate and battery temperature. The results of such changes are reflected in the display contents in the charging rate window W5 and the battery temperature window W6.

[0116] 8 , the partial power profile PFa1 is changed to a partial power profile PFa3 by reducing the discharge time, which was set to be between 14:00 and 22:00 on November 5, 2023, to the range between 14:00 and 20:00, as indicated by the arrow AR4 in the enlarged power window W4. As a result of this change, the partial power profile PFa1 is displayed in the power window W5 as a partial power profile PFb3 in which the power storage rate in the range corresponding to the partial power storage rate profile PFb1 has been changed as indicated by the arrow AR5. Furthermore, the battery temperature window W6 is displayed as a partial battery temperature profile PFc3 in which the battery temperature in the range corresponding to the partial battery temperature profile PFc1 has been changed as indicated by the arrow AR6.

[0117] In the partial battery temperature profile PFc3, the battery temperature remains below the upper limit throughout the entire range of discharge time. Furthermore, no particular problems occur in the partial state-of-charge profile PFb3. In such cases, the operation plan determination processor 13 determines that the revised operation plan is "operable."

[0118] Therefore, when the Confirm Change button BT6 is pressed on the correction processing screen in this state, the overview window W1 of the simulation result screen, which is displayed in place of the correction processing display image IM3, displays "◎" indicating that the corrected operation plan is in an "operational" state. At that time, the overall output window W3 displays the corrected charge / discharge graph, but the transition button BT0 is not displayed. Note that the enlarged output window W4, the charging rate window W5, and the battery temperature window W6 display information according to the current position and range of the pair of range setting slide bars SD.

[0119] Furthermore, when the completion button BT2 displayed on the simulation result screen is pressed in this state, the operation plan determination processing unit 13 generates modified operation plan data D3α in which the original operation plan is changed to the settings in the partial output profile PFa3.

[0120] In this way, when "automatic setting" is selected on the correction processing screen, the operator can correct the operation plan while viewing the simulation results on the screen, thereby efficiently reviewing the operation plan.

[0121] On the other hand, Figure 9 is a diagram illustrating an example of an image of the setting output change input table (change input table image) IM5 that the operation plan determination processing unit 13 displays on the display unit when "Manual Setting" is selected on the toggle switch TS1 on the correction processing screen and the recalculation button BT3 is pressed.

[0122] 9, the range shown in the enlarged output window W4 is displayed as the target for change input. Column R4 contains check boxes indicating frames for which the output settings are to be changed, column R5 displays the frame numbers of the range shown in the enlarged output window W4, and column R6 displays the output settings. The checked frames in column R4 are frames that correspond to the range targeted by discharge P0 in the partial output profile PFa1 shown in the enlarged output window W4.

[0123] The operator can modify the operation plan by operating the input unit to appropriately change the setting output value in column R6 of the frame with a check mark in column R4. When the operation plan is modified, the operation plan determination processing unit 13 generates modified operation plan data D3α that reflects the contents of the modification. In addition, the operation plan simulation unit 12 performs a simulation based on the modified operation plan, and the results of the simulation are displayed on the display unit.

[0124] (Implementation of Operation Plan) The user of the energy storage system 2 who received the determination result report data D3 at the operation plan processing device 4 or another terminal transfers, at an appropriate time, the proposed operation plan data D1 determined to be "operable" by the operation feasibility determination device 1, or the corrected operation plan data D3α received as the determination result report data D3 and finally set to a "operable" state after correction, as official operation plan data from the user of the energy storage system 2 who formulated the operation plan to the operation plan management device 3 of the energy storage company A. Based on the description content of the received data, the operation plan management device 3 causes the control device 22 of the energy storage system 2 to operate the storage battery 21 and its auxiliary devices, the heater 23 and the fan 24. This makes it possible to reliably perform charging and discharging operations of the storage battery 21 in accordance with the user's operation plan. In other words, it is possible to avoid situations where charging and discharging operations in accordance with the operation plan cannot be performed due to the state of the storage battery, etc.

[0125] As described above, the operation feasibility determination device according to this embodiment is a device owned by an energy storage business operator together with a power storage system including a storage battery, and is capable of determining whether or not charging and discharging operations of the storage battery can be performed in accordance with an operation plan created by a user of the power storage system. Furthermore, if the operation plan cannot be performed due to the state or constraints of the storage battery, the operation plan can be modified through input operations by an operator. By using this operation feasibility determination device, it is possible to avoid situations where charging and discharging operations according to the operation plan cannot be performed due to the state of the storage battery, etc.

[0126] <Second embodiment> In the first embodiment, a case was described in which the operation plan is modified by the operation of the operator of the operation feasibility determination device 1, but in this embodiment, a case is described in which the operation plan in the operation feasibility determination device 1 is modified automatically in accordance with a pre-set priority.

[0127] 10 is a diagram showing the configuration of an operation feasibility determination device 1 according to the second embodiment, together with the data to be handled. The operation feasibility determination device 1 according to this embodiment includes an operation plan acquisition unit 11, as in the first embodiment, and also includes an operation plan processing unit 15 as a functional component in place of the operation plan simulation unit 12 and the operation plan determination processing unit 13.

[0128] The operation plan processing unit 15 is a unit that simulates the operation plan, determines whether the operation plan is feasible, and modifies the operation plan if it is determined that the operation plan is not feasible, based on the prioritized operation plan proposal data D1α. The operation plan processing unit 15 is a unit that roughly combines the functions of the operation plan simulation unit 12 and the operation plan determination processing unit 13 that are provided in the operation feasibility determination device 1 according to the first embodiment.

[0129] In addition, the operational feasibility determination device 1 of this embodiment is also equipped with an accompanying processing unit 14, as in the first embodiment, and the accompanying data D4 generated in the accompanying processing unit 14 may be output to the operational plan processing device 4 together with the determination result report data D3.

[0130] On the other hand, the operation plan processing device 4 according to this embodiment has the functional components shown in Fig. 2, similar to the first embodiment. That is, in this embodiment as well, the operation plan is created by the operation plan processing device 4.

[0131] However, in the plan creation unit 43 of the operation plan processing device 4 according to this embodiment, prioritized operation plan proposal data D1α is created instead of the operation plan proposal data D1. The prioritized operation plan proposal data D1α is data in which priority information that is referenced when it becomes necessary to change the set output of each frame is added to an operation plan that describes the charge / discharge output of the storage battery 21 on a frame-by-frame basis. Then, this operation plan proposal data D1 is passed to the operation plan acquisition unit 11 of the operation feasibility determination device 1.

[0132] 11 is a diagram illustrating the prioritized operation plan proposal data D1α. In addition to columns R1 to R3 having the same content as the operation plan proposal data D1 shown in FIG. 3, the prioritized operation plan proposal data D1α also includes a column R7 in which the lower and upper limits of the changeable range (unit: kW) of the charge / discharge power for each frame are written in sub-columns R7a and R7b, respectively, and a column R8 in which the priority set for each frame is written.

[0133] For example, in the case of the fourth frame on November 1, 2023, the set output is 10,000 kW in column R3, while sub-column R7a lists 8,000 kW and sub-column R7b lists 10,000 kW. If this frame is subject to correction, the set output can be corrected down to 8,000 kW, but it cannot be corrected up to 10,000 kW.

[0134] Furthermore, column R8 describes the priority of each frame when charging and discharging are performed based on the set output set in column R3. The priority is described as a natural number, and the smaller the value, the higher the priority. When it becomes necessary to modify the operation plan, the frame with the lowest priority is subject to modification. Priority may be set separately for charging and discharging.

[0135] It should be noted that frames with a priority of "1" are excluded from the scope of correction. This means that if the operational plan is still determined to be inoperable even after all possible corrections have been made to frames with a priority of "2" or lower, no further corrections can be made.

[0136] The priority may be freely set by the user of the energy storage system 2, but from the perspective of monetizing through the sale and purchase of electricity, it is preferable to set a high priority for times (frames) that have a large impact on revenue and a low priority for times (frames) that have a small impact.

[0137] In the operation feasibility determination device 1 according to this embodiment, the prioritized operation plan proposal data D1α having the above-described description content is subjected to simulation and further subjected to determination of the feasibility of the operation plan.

[0138] FIG. 12 is a diagram showing the flow of processing related to the simulation of an operation plan and its modification, which is performed in the operation feasibility determination device 1 according to the second embodiment.

[0139] First, the operation plan acquisition unit 11 acquires the prioritized operation plan proposal data D1α created by the plan creation unit 43 of the operation plan processing device 4, and stores it in a storage unit (not shown) (step S1).

[0140] Then, when an execution instruction is given from the input unit by the operator of the operation feasibility determination device 1, the operation plan processing unit 15 responds to this and executes a simulation (charge / discharge simulation) of the operation plan described in the prioritized operation plan proposal data D1α (step S2).

[0141] In this simulation, as in the first embodiment, the description of the battery status data DB1, which indicates the state of the storage battery 21 (battery temperature, depth of discharge, state of deterioration, etc.) and the constraints on operation (upper and lower limits of battery temperature, etc.), necessary for the execution of the simulation, is referenced.

[0142] Furthermore, the simulation may also be performed including the operation of the heater 23 and the fan 24, which are auxiliary devices of the storage battery 21, as in the first embodiment.

[0143] Then, the state of charge (SOC) and battery temperature of the storage battery 21 when charging and discharging operations are performed in accordance with the set output described in the operation plan are predicted for each frame described in the operation plan, and it is determined whether the predicted charging and discharging power and battery state (state of charge and battery temperature) for each frame, i.e., the indices to be judged, fall within an allowable range determined based on the description in the storage battery state data DB1.

[0144] In addition, when making the determination, a criterion based on constraints on the control of the heater 23 and the fan 24, which are auxiliary devices of the storage battery 21, may be further set.

[0145] If, as a result of the simulation, the charge / discharge power is determined to be within the acceptable range for all frames (OK in step S3) and the battery state is determined to be within the acceptable range (OK in step S4), the operation plan processing unit 15 outputs determination result report data D3 describing this and including simulation result data D2 to the operation plan processing device 4 (step S5).

[0146] In this embodiment, too, the judgment result report data D3 may be sent to a computer or other terminal owned by the user who created the operation plan that was the subject of the simulation, instead of or in parallel with being output to the operation plan processing device 4.

[0147] On the other hand, if there is a frame whose charge / discharge power is determined to be out of the allowable range (NG in step S3), or if there is a frame whose battery state is determined to be out of the allowable range (NG in step S4), the operation plan processing unit 15 refers to the contents of the prioritized operation plan proposal data D1α and determines whether there is a frame that can be corrected (step S6). Specifically, it determines whether there is a frame that is low in priority in the prioritized operation plan proposal data D1α and whose charge / discharge power or battery state that is determined to be out of the allowable range can be corrected by changing the set output.

[0148] If it is determined that there is a frame that can be modified (YES in step S6), the operation plan processing unit 15 changes the setting output of the frame based on the changeable range of charge / discharge power for the frame described in the prioritized operation plan proposal data D1α (step S7), and performs a charge / discharge simulation again (step S2).

[0149] If the result of the re-simulation indicates that the charge / discharge power is within the allowable range for all frames (OK in step S3) and that the battery state is within the allowable range (OK in step S4), the operation plan processing unit 15 generates corrected operation plan data D3α that describes an operation plan that reflects the change in the set output. Then, the operation plan processing unit 15 outputs determination result report data D3 that describes the need to correct the original operation plan and includes the simulation result data D2 and the corrected operation plan data D3α (step S5). The simulation result data D2 includes the original simulation results and the simulation results after the operation plan has been corrected.

[0150] If the second simulation still determines that the charge / discharge power does not meet the allowable range for any frame (NG in step S3), or if the battery condition does not meet the allowable range for any frame (NG in step S4), steps S6 and onward are repeated.

[0151] On the other hand, if it is determined that there are no frames that can be corrected (NO in step S6), NG corrected operation plan data D3β describing the (corrected) operation plan at that time is output to the operation plan processing device 4 (step S8).

[0152] 13 and 14 are diagrams for explaining a first example of the modification of the operation plan in accordance with the priority order, which is performed in this embodiment.

[0153] 13 shows an output profile PFa4 indicating an operation plan for a certain day (from midnight to midnight) based on the contents of the prioritized operation plan proposal data D1α, and the priorities for each of the 48 frames for that day. For ease of explanation, the priorities are set to three levels: "1 (high priority)," "2 (medium priority)," and "3 (low priority)."

[0154] 13 also shows the number of frames with the same priority, and the charge amount profile PFb4 and battery temperature profile PFc4 corresponding to the output profile PFa4. These profiles correspond to the results of a simulation performed by the operation plan processing unit 15 using the prioritized operation plan proposal data D1α that assigns the output profile PFa4. In this example, the upper limit of the battery temperature is assumed to be 340°C.

[0155] According to the output profile PFa4, the charge / discharge operation scheduled in the operation plan is only discharge at a set output of 10 MW from 12:00 to 16:00 (25th to 32nd frames).

[0156] On the other hand, according to the charge amount profile PFb4, the charge amount at the start of the operation plan is 30 MWh, and according to the battery temperature profile PFc4, the battery temperature at the start of the operation plan is 305°C.

[0157] Between midnight and 12 noon (frames 1 through 24), when no charging or discharging operations are performed, neither the charge level nor the battery temperature changes. However, as discharging begins at 12 noon (frame 25), the charge level decreases and the battery temperature rises. Then, during the scheduled discharging, at 3 p.m. (the end of frame 30), the charge level reaches 0 MWh. This means that further discharging cannot actually occur. Therefore, charging and discharging operations according to the output profile PFa4 shown in FIG. 13 are inoperable for at least the portion P2 from 3 p.m. onward (frames 31 through 48).

[0158] In such a case, the operation plan processing unit 15 determines that there is a frame whose battery condition does not meet the acceptable range (NG in step S4), and then refers to the description contents of the prioritized operation plan proposal data D1α to determine whether there is a frame that can be corrected (step S6).

[0159] In the example shown in Figure 13, the period from 12:00 to 16:00 (frames 25 to 32) when discharge is scheduled to occur is assigned a priority of "1," and therefore, no adjustment can be made to reduce the set output during such discharge. However, the periods from 2:30 to 7:00 (frames 6 to 14) before 12:00 when such discharge is scheduled are assigned the lowest priority of "3." Furthermore, although not shown in the figure, the prioritized operation plan proposal data D1α allows the set output to be reduced to -3.25 MW during this period (for charging up to 3.25 MW).

[0160] In such a case, the operation plan processing unit 15 determines that it is possible to correct the set output for each frame from 2:30 to 7:00 (frames 6 to 14) (YES in step S6), and makes a correction to reduce the set output for at least some of the frames (step S7).

[0161] 14 shows an output profile PFa5 based on the operation plan after the set output has been corrected, and a charge amount profile PFb5 and a battery temperature profile PFc5 obtained based on the output profile PFa5. Similar to FIG. 13, the priority of each frame and the number of frames that continue to have the same priority are also shown.

[0162] The output profile PFa5 shown in Figure 14 illustrates an example in which the operation plan processing unit 15 modifies the operation plan so that charging is performed with a set output of -3.25 MW for each frame from 2:30 to 6:30 (frames 6 to 13) shown in part P3.

[0163] In response to this correction, in the charge amount profile PFb5, the charge amount, which was 30 MWh from midnight to 2:30 (frames 1 to 5), increases to 40 MWh from 2:30 to 6:30 (frames 6 to 13), and is maintained at this charge amount until 12:00 (the end of frame 24), when discharging begins. Note that when charging is performed for four hours (eight frames) with a set output of -3.25 MW, the expected increase in power is estimated to be 3.25 MW x 4 h = 13 MWh. However, the increase in charge amount in the output profile PFa5 is set to 10 MWh because the occurrence of charging loss is taken into consideration when the operation plan processing unit 15 performs the simulation.

[0164] Furthermore, since the amount of heat generated by the storage battery due to charging does not exceed the amount of heat dissipated, the battery temperature is maintained by heating using the heater 23, and therefore in the battery temperature profile PFc5, the battery temperature from 2:30 to 6:30 (frames 6 to 13) is the same as at the start of operation.

[0165] When discharge begins at 12:00 (frame 25), the charge level decreases and the battery temperature rises, but because the initial charge level is 40 MWh, the charge level does not reach 0 during the period from 12:00 to 16:00 (frames 25 to 32) when discharge is scheduled to occur.

[0166] In addition, in the battery temperature profile PFc5, the battery temperature reaches its maximum at 16:00 (end of the 32nd frame) when discharge ends, but this maximum value is lower than the upper battery temperature limit and is therefore within the allowable range.

[0167] This means that when the storage battery 21 is operated according to the corrected operation plan that gives the output profile PFa5, both the charge amount and the battery temperature will fall within the allowable range for the storage battery 21.

[0168] 15 and 16 are diagrams for explaining a second example of the modification of the operation plan according to the priority order performed in this embodiment. Note that in this example, the upper limit of the battery temperature is also assumed to be 340°C.

[0169] 15 shows an output profile PFa6 that indicates an operation plan for a certain day (from 0:00 to 24:00) based on the contents of the prioritized operation plan proposal data D1α, and the priorities for each of the 48 frames for that day. The method for setting the priorities is the same as in the first example.

[0170] 15 also shows the number of frames for which the same priority continues, and the charge amount profile PFb6 and battery temperature profile PFc6 corresponding to the output profile PFa6. These profiles correspond to the results of a simulation performed by the operation plan processing unit 15 using the prioritized operation plan proposal data D1α that assigns the output profile PFa6.

[0171] According to the output profile PFa6, the charge and discharge operations scheduled in the operation plan are charging at a set output of -10 MW from 10:30 to 15:00 (22nd to 30th frames) and discharging at a set output of 10 MW from 15:00 to 21:00 (31st to 42nd frames).

[0172] On the other hand, according to the charge amount profile PFb6, the charge amount at the start of the operation plan is 30 MWh, and according to the battery temperature profile PFc6, the battery temperature at the start of the operation plan is 305°C.

[0173] Between midnight and 10:30 (frames 1 to 21), when no charging or discharging occurs, the charge amount and battery temperature remain constant, but between 10:30 and 15:00 (frames 22 to 30), when charging occurs, the charge amount increases to 60 MWh, although the battery temperature remains constant.

[0174] As discharging begins at 3:00 PM (frame 31), the charge level decreases and the battery temperature rises. However, during the scheduled discharge, at 8:00 PM (at the end of frame 40), the battery temperature reaches the upper limit of 340°C, as indicated by arrow AR7. This means that further discharge cannot actually be performed. Therefore, charge / discharge operations according to the output profile PFa6 shown in FIG. 15 are inoperable for at least portion P4 from 8:00 PM onward (frames 41 to 48).

[0175] In such a case, the operation plan processing unit 15 determines that there is a frame whose battery condition does not meet the acceptable range (NG in step S4), and then refers to the description of the prioritized operation plan proposal data D1α to determine whether there is a frame that can be corrected (step S6).

[0176] In the example shown in Figure 15, of the periods between 3:00 PM and 9:00 PM (frames 31 to 42) during which discharge is set, the periods between 3:00 PM and 6:30 PM (frames 31 to 37) are set as priority "1," so no adjustment can be made to reduce the set output during such discharge.

[0177] Furthermore, the frames from midnight to 10:30 (frames 1 to 21) before the scheduled start of discharge and the frames from 9:00 to 24:00 (frames 43 to 48) after the scheduled end of discharge are set to the lowest priority of "3." However, charging during the former frame would not lead to suppression of the battery temperature thereafter, and the latter frame occurs after the battery temperature has reached its upper limit, so neither of these can be used for correction. In other words, the frames set to priority "3" in the operation plan that assigns output profile PFa6 cannot be subject to correction.

[0178] In this case, the frame with priority set to "2" will be the target of correction. However, for the period from 10:30 to 15:00 (frames 22 to 30) when discharge is scheduled to occur prior to discharge, even if the charge amount is changed or discharge is performed instead of charging, this will not lead to suppression of the rise in battery temperature thereafter.

[0179] On the other hand, discharge is scheduled for the period from 18:30 to 21:00 (frames 37 to 42), which is also set to priority "2." However, if discharge is suppressed during this time period, it is possible to prevent the battery temperature from reaching the upper limit. Furthermore, although not shown, the prioritized operation plan data D1α allows the set output to be reduced to 0 MW (reducing the discharge amount or canceling discharge) during this time period.

[0180] In such a case, the operation plan processing unit 15 determines that it is possible to correct the set output for each frame from 18:30 to 21:00 (frames 37 to 42) (YES in step S6), and makes a correction to reduce the set output for that frame (step S7).

[0181] 16 shows an output profile PFa7 based on the operation plan after the set output has been corrected, and a charge amount profile PFb7 and a battery temperature profile PFc7 obtained based on the output profile PFa7. Similar to FIG. 15, the priority of each frame and the number of frames that continue to have the same priority are also shown.

[0182] 16 illustrates an example of a case where the operation plan processing unit 15 modifies the operation plan for each frame from 19:30 to 21:00 (frames 40 to 42) shown in portion P5 so that the set output, which was initially 10 MW, becomes 0 MW, i.e., so that discharge during that time is stopped. As a result, the discharge power amount is reduced by 10 MW x 1.5 h = 15 MWh.

[0183] Furthermore, in response to this correction, the battery temperature profile PFc7 changes from 0:00 to 19:30 (frames 1 to 39) in the same way as before the correction, and the battery temperature, which reached the upper limit at 19:30, decreases from 19:30 onwards (frames 40 to 48). In other words, the battery temperature is within the allowable range.

[0184] Additionally, in the charge amount profile PFb7, the charge amount changed in the same manner as before the correction from midnight to 19:30 (frames 1 to 39), but was maintained at 40 MWh from 19:30 onwards (frames 40 to 48). In other words, the charging rate was also within the allowable range.

[0185] This means that when the storage battery 21 is operated in accordance with the corrected operation plan that gives the output profile PFa7, both the charge amount and the battery temperature will fall within the allowable range for the storage battery 21.

[0186] As described above, in the operation feasibility determination device according to this embodiment, the modification of the storage battery operation plan, which was performed by an operator in the first embodiment, is performed automatically based on the priority order set for each unit in advance. Furthermore, the processing after the user of the power storage system receives the determination result report data is performed in the same manner as in the first embodiment.

[0187] As a result, in this embodiment, in addition to achieving the same effects as in the first embodiment, the workload on the operator is reduced, and the battery operation plan can be revised more reliably and efficiently in the operation feasibility determination device.

[0188] In addition, the operation feasibility determination device 1 of this embodiment may also be configured to selectively execute the modification of the operation plan based on input operations by the operator, as in the first embodiment.

[0189] <Modification> In the simulation based on the operation plan performed in the first and second embodiments described above, the state of charge (SOC) of the storage battery 21 and the temperature (battery temperature) of the storage battery 21 when charging and discharging operations are performed in accordance with the set output described in the operation plan are predicted and used as the indices to be determined. In addition to these, the charging and discharging current may also be used as the object of the simulation and as one of the indices to be determined.

[0190] In this case, the upper limit of the charge / discharge current is set according to the specifications of the storage battery 21, but may be set to a different value depending on the state of the storage battery 21 (such as battery temperature, depth of discharge, and deterioration state). Also, the upper limit of the charge / discharge current may be set to a different value during discharge than during charge. For example, in the case of a lithium-ion battery, the charge power may be limited at low temperatures but the discharge power may not be limited. In such a case, the upper limit of the charge / discharge current during discharge may be set to a different value during charging than during discharge.

[0191] Alternatively, at least one of the charging rate, the battery temperature, and the charge / discharge current may be the target of simulation and may be the index to be determined.

[0192] In either case, as in the above-described embodiment, it is determined whether or not all the target indices fall within the allowable range determined based on the contents of the storage battery state data DB1.

[0193] If all the indices to be judged are within the allowable range, the operation plan that was the subject of the simulation is judged to be "operational." If there is a frame that does not fall within the allowable range for at least one of the indices to be judged, the operation plan that was the subject of the simulation is judged to be "not operable," and the operation plan is subject to revision.

[0194] <Example of Associated Processing> In the following, an example of associated information generated by the associated processing unit 14 when the operation feasibility determination device 1 includes the associated processing unit 14 will be described.

[0195] (Output of charging / discharging information) The associated processing unit 14 may generate, as associated information, charging / discharging information that is at least one of charging / discharging power amount, charging / discharging loss, and charging / discharging efficiency when charging / discharging is carried out based on the operational plan described in the proposed operational plan data D1 or the revised operational plan data D3α that has been determined to be operational, and output associated data D4 that describes the charging / discharging information together with the determination result report data D3.

[0196] A user of the power storage system 2 who receives the charge / discharge information can more accurately estimate the power cost equivalent to the charge / discharge loss that occurs when charging / discharging based on the operation plan. By calculating the profit taking into account the power cost, the accuracy of the profit calculation is improved compared to when the profit is calculated based on the charge / discharge loss estimated from the standard charge / discharge efficiency.

[0197] In addition, when the control constraints of the heater 23 and the fan 24, which are auxiliary devices of the storage battery 21, are taken into consideration when referring to the simulation, such constraints may also be taken into consideration when calculating the electricity cost. In such a case, the accuracy of the profit calculation is further improved.

[0198] (Output of information on fee fluctuations associated with corrections) Users of the energy storage system 2 are previously presented with a usage fee (basic fee) according to the operation period by the energy storage company A, and create an operation plan based on the usage fee. However, when the operation plan is corrected by the operation feasibility determination device 1 as described above, the differences in charge amount and battery temperature before and after operation assumed in the corrected operation plan usually differ from those assumed by the user when the operation plan before correction was created. Therefore, the fees charged to users by the energy storage company A will also fluctuate depending on how these differences arise.

[0199] For example, if the initial operation plan assumed that the amount of charge at the start of operation would be equal to the amount of charge at the end of operation, and a difference between the two arises as a result of a revision to the operation plan, the energy storage operator A may take the following steps.

[0200] - If the "amount of charge at the start of operation is greater than the amount of charge at the end of operation", an additional fee is charged according to the difference in the amount of charge; - If the "amount of charge at the start of operation is less than the amount of charge at the end of operation", a fee according to the difference in the amount of charge is deducted from the usage fee; Furthermore, with regard to the difference in battery temperature, the following embodiments are exemplified.

[0201] ・If the battery temperature at the start of operation is less than the battery temperature at the end of operation, an additional charge will be incurred according to the difference in temperature.

[0202] This is based on the consideration that if the battery temperature is high at the end of the operation plan, there will be restrictions on the charge / discharge operations to be performed thereafter.

[0203] The associated processing unit 14 may generate information relating to these price fluctuations as associated information and output associated data D4 describing the price fluctuation information together with the determination result report data D3. Examples of the price fluctuation information include the amount of charge / discharge added or reduced in accordance with the revision of the operation plan and a corresponding additional charge, the amount of charge before and after operation and the difference therebetween, and a price corresponding to the difference therebetween.

[0204] In addition, the output of the associated data D4 containing the relevant fare fluctuation information may be performed in such a manner that a menu screen showing the fare fluctuation information and allowing the user to select the following points can be displayed on the operation plan processing device 4 or other terminal (hereinafter collectively referred to as the user terminal) owned by the user.

[0205] (1) Whether or not to implement the revised operation plan; (2) Whether or not the additional charging and discharging associated with the revision will be carried out by the energy storage business operator or the user.

[0206] Users of the energy storage system 2 who receive the rate fluctuation information can determine whether to charge or discharge the energy storage system 2 based on their operation plan after recognizing the usage charges that reflect the actual situation. Furthermore, by taking this information into consideration when calculating revenue, the accuracy of the revenue calculation is improved. Therefore, it becomes possible to more appropriately determine whether to use the energy storage system 2 from the perspective of revenue.

[0207] Furthermore, from the viewpoint of the energy storage business operator A, it is possible to reflect variable costs that change depending on the operational status in the usage fee, thereby making it possible to ensure fairness in the usage fee among users.

[0208] Regardless of whether the energy storage business operator A sends the associated data D4 including the fee fluctuation information together with the determination result report data D3 in the above manner, after the charging / discharging operation based on the operable operation plan presented by the user is actually performed in the storage battery 21, the energy storage business operator A calculates a fee based on the actual charging / discharging operation and bills the user for the fee. By setting and billing fees that are in line with the operating costs and actual usage, it becomes possible to utilize the energy storage system 2 economically.

[0209] Furthermore, since it becomes possible for both energy storage business operator A and users such as power generation business operator B, transmission and distribution business operator C, and retail electricity business operator D to appropriately compare the prices and costs of charging and discharging, it becomes possible to appropriately operate the business in which these users use the energy storage system 2 owned by energy storage business operator A.

[0210] Fig. 17 is a diagram showing a display image (menu display image) IM6 of a menu screen including fee fluctuation information, which is displayed on a user terminal when the operation plan is revised in accordance with the above-mentioned first example. Fig. 18 is a diagram showing a display image (menu display image) IM7 of a menu screen including fee fluctuation information, which is displayed on a user terminal when the operation plan is revised in accordance with the above-mentioned second example.

[0211] As shown in menu display images IM6 and IM7, the menu screen including the price fluctuation information displays a price information window W7, a priority window W8, an output window W9, a charge amount window W10, and a battery temperature window W11.

[0212] The priority window W8, output window W9, charge amount window W10, and battery temperature window W11 of the menu display image IM6 respectively display the priority of each frame, the modified output profile PFa5, the modified charge amount profile PFb5, and the modified battery temperature profile PFc5, which are described in the prioritized operation plan proposal data D1α in the first example shown in Figure 14.

[0213] The fee information window W7 then displays the additional charging energy of 13 MWh and the fee for the additional charging, 130,000 yen, due to the need for additional charging resulting from the revision of the operating plan in the first example.

[0214] The fee information window W7 further displays that the charge amount at the start of operation according to the operation plan (charge amount before the period) is 30 MWh, the charge amount at the end (charge amount after the period) is 0 MWh, the difference between the two (charge amount difference) is -30 MWh, and the resulting charge amount difference fee is 360,000 yen.

[0215] In addition, the priority window W8, output window W9, charge amount window W10, and battery temperature window W11 of the menu display image IM7 respectively display the priority of each frame, the modified output profile PFa7, the modified charge amount profile PFb7, and the modified battery temperature profile PFc7, which are described in the prioritized operation plan proposal data D1α in the second example shown in Figure 16.

[0216] The fee information window W7 displays a reduced discharge energy amount of 15 MWh due to the cancellation of discharge in accordance with the modification of the operation plan in the second example.

[0217] The fee information window W7 further displays that the charge amount at the start of operation according to the operation plan (charge amount before the period) is 20 MWh, the charge amount at the end (charge amount after the period) is 40 MWh, the difference between the two (charge amount difference) is +20 MWh, and the resulting charge amount difference fee is -200,000 yen.

[0218] Furthermore, as shown in both menu display images IM6 and IM7, the menu screen containing the price fluctuation information further displays a toggle switch TS2, a plan adoption button BT8, and a plan rejection button BT9.

[0219] The toggle switch TS2 is a switch for the user to select whether the additional charging / discharging associated with the correction will be performed by the user or by the energy storage business operator. Two options, "customer" meaning the user and "energy storage business operator", are exclusively selectable.

[0220] If the user intends to procure additional charging power by some means, the user selects "Customer" and presses the "Apply Plan" button BT8. In this case, the additional fee displayed in the fee information window W7 will not be paid, and the user will only pay the basic fee.

[0221] When entrusting the procurement of additional charging power to the energy storage provider, the user selects "Energy Storage Provider" and then presses the "Plan Adoption" button BT8. In this case, the additional fee displayed in the fee information window W7 is paid and received.

[0222] In either case, by pressing the plan adoption button BT8, the user adopts the operation plan described in the revised operation plan data D3α as the official operation plan. In such a case, as described above, the revised operation plan data D3α is transferred to the operation plan control device 3 at an appropriate timing, and the power storage system 2 is requested to operate the storage battery 21 based on the revised operation plan data D3α.

[0223] On the other hand, if the user decides not to adopt the operation plan described in the revised operation plan data D3α, the user presses the plan rejection button BT9.

Claims

1. A device for determining whether or not a storage battery can be operated based on an operation plan for a predetermined period created by a user of the storage battery, comprising: an acquisition unit that acquires the operation plan created by the user, the operation plan describing set values ​​of charge and discharge output of the storage battery for each unit time segment; a simulation unit that simulates at least one of the charge rate, temperature, and charge and discharge current of the storage battery when charge and discharge operations are performed on the storage battery in accordance with the description of the operation plan acquired by the acquisition unit; a determination unit that determines whether or not the storage battery can be operated in accordance with the operation plan using the set values ​​of the charge and discharge output for each unit time segment described in the operation plan and the results of the simulation by the simulation unit as indicators to be determined; and a correction unit that can correct the operation plan when the determination unit determines that the storage battery cannot be operated in accordance with the description of the operation plan, wherein the determination unit determines that the storage battery can be operated in accordance with the operation plan when all of the indicators to be determined are within a predetermined allowable range, an operation feasibility determination device that determines that operation of the storage battery in accordance with the operation plan is not possible when at least one of the indicators to be determined is not within the allowable range; the correction unit is capable of correcting the operation plan by adjusting the setting value of the charge / discharge output for each unit time segment in the operation plan that the determination unit has determined to be not possible; and when the operation plan is corrected by the correction unit, the determination unit determines whether operation of the storage battery is possible for the operation plan after the correction.

2. An operational feasibility determination device as described in claim 1, wherein the operational plan describes the priority for each unit time segment and the range within which the setting value can be changed in each unit time segment when corrections are made by the correction unit, and the correction unit corrects the operational plan based on the priority and the range within which the setting value can be changed.

3. An operational feasibility determination device as described in claim 1, comprising: a display unit capable of displaying at least the results of the simulation; and an input unit that allows an operator to perform predetermined input operations on the results of the simulation displayed on the display unit, wherein the correction unit enables the operator to correct the operational plan by operating the input unit to adjust the setting value of the charge / discharge output for each unit time segment in the results of the simulation displayed on the display unit.

4. An operation feasibility determination device as set forth in any one of claims 1 to 3, characterized in that when charge / discharge operations are performed on the storage battery in accordance with the operation plan determined by the determination unit to be operable, charge / discharge information is generated which is at least one of the amount of charging energy, charge / discharge loss, and charge / discharge efficiency of the storage battery.

5. An operation feasibility determination device as set forth in any one of claims 1 to 3, characterized in that, when the charging and discharging operations of the storage battery in accordance with the operation plan determined by the determination unit to be operable are carried out by the user paying a specified usage fee to the energy storage business operator that owns the storage battery, the operation feasibility determination device generates information regarding fluctuations in the usage fee resulting from the operation plan being modified by the modification unit.

6. An operation feasibility determination device according to any one of claims 1 to 3, wherein the temperature of the storage battery is controlled by a heater and a fan, and the operation of the heater and the fan is also included in the simulation in the simulation unit.

7. A method for determining whether or not a storage battery can be operated based on an operation plan for a predetermined period created by a user of the storage battery, comprising: an acquisition step of acquiring an operation plan created by the user, the operation plan describing set values ​​of charge and discharge output of the storage battery for each unit time segment; a simulation step of simulating at least one of the charge rate, temperature, and charge and discharge current of the storage battery when charge and discharge operations are performed on the storage battery in accordance with the description of the operation plan acquired in the acquisition step; a determination step of determining whether or not the storage battery can be operated in accordance with the operation plan using the set values ​​of the charge and discharge output for each unit time segment described in the operation plan and the results of the simulation in the simulation step as indicators to be determined; and a correction step of correcting the operation plan if it is determined in the determination step that the storage battery cannot be operated in accordance with the description of the operation plan, wherein in the determination step, it is determined that the storage battery can be operated in accordance with the operation plan if all of the indicators to be determined fall within a predetermined allowable range, an operation feasibility determination method comprising: determining that operation of the storage battery according to the operation plan is not possible if at least one of the indicators to be determined does not fall within the allowable range; in the correction process, correcting the operation plan by adjusting the setting value of the charge / discharge output for each unit time segment in the operation plan determined to be not possible in the determination process; and when the operation plan is corrected in the correction process, performing the determination process again for the corrected operation plan.

8. A method for determining whether an operation is possible as described in claim 7, characterized in that the operation plan describes the priority for each unit time segment and the range within which the setting value can be changed in each unit time segment when making a correction in the correction process, and in the correction process, the operation plan is corrected based on the priority and the range within which the setting value can be changed.

9. A method for determining whether an operation is possible as described in claim 7, characterized in that in the correction step, the setting value of the charge / discharge output for each unit time segment in the results of the simulation displayed on a predetermined display means is adjusted by operating a predetermined input means, thereby correcting the correction of the operation plan.

10. A method for determining whether operation is possible as described in any one of claims 7 to 9, further comprising a charge / discharge information generation step of generating charge / discharge information, which is at least one of the amount of charging energy, charge / discharge loss, and charge / discharge efficiency of the storage battery, when charge / discharge operations are performed in the storage battery in accordance with the operation plan determined to be possible for operation in the determination step.

11. A method for determining whether operation is possible as described in any one of claims 7 to 9, wherein the charging and discharging operations of the storage battery in accordance with the operation plan determined to be operable in the determination step are carried out by the user paying a specified usage fee to the energy storage business operator that owns the storage battery, and the method for determining whether operation is possible is characterized by further comprising a fee fluctuation information generation step of generating information regarding fluctuations in the usage fee resulting from the operation plan being modified in the modification step.

12. A method for determining whether an operation is possible as described in any one of claims 7 to 9, wherein the temperature of the storage battery is controlled by a heater and a fan, and the operation of the heater and the fan is also included in the simulation in the simulation step.

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