Storage battery operation system, storage battery operation method, and program

Abstract

To reduce the possibility of interruption of a deterioration diagnosis of a storage battery when the deterioration diagnosis is performed while a predetermined charge / discharge schedule is being executed.SOLUTION: A storage battery operation system includes: a site that includes a PCS and a plurality of pairs of one or more storage batteries connected to the PCS, and that performs charging / discharging for an external system; and a management device that controls the site. When performing a deterioration diagnosis by charging / discharging for part of the storage batteries, the management device performs the following so as to execute a predetermined charge / discharge schedule: when it is necessary to perform discharging to cancel charging in the deterioration diagnosis, causing discharging by at least either another storage battery or a generator if the site has the generator; and when it is necessary to perform charging to cancel discharging in the deterioration diagnosis, causing charging by the other storage battery.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] An embodiment of the present invention relates to a storage battery operation system, a storage battery operation method, and a program. [Background technology]

[0002] When operating a storage battery, it is important to know the degree of deterioration of the battery. Many diagnostic methods require data acquisition under specific charge / discharge patterns. Therefore, when applying diagnostic methods to a storage battery operation system, it may lead to a decrease in profits by interrupting or changing the charge / discharge operation that is originally expected of the storage battery operation system.

[0003] Therefore, there is a need for a method that allows the application of diagnostic techniques during operation while minimizing the impact on the original charging and discharging operation of the battery operation system. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6036236 Summary of the Invention [Problem to be solved by the invention]

[0005] For example, in a storage battery operation system, when a load requests charging / discharging, another storage battery charges / discharges the battery that is performing charging / discharging for deterioration diagnosis. In this conventional technology, the resources below the PCS (Power Conditioning System) are controlled, and the resources that can take over charging / discharging are limited to those below the PCS. In other words, the number of resources that can take over charging / discharging is small.

[0006] Therefore, when a battery is requested to discharge from a load and another resource is used to charge or discharge the battery in place of the battery that is performing the charge or discharge for the deterioration diagnosis, there is a high possibility that a resource shortage will occur. If a resource shortage occurs, the deterioration diagnosis will be interrupted.

[0007] Therefore, the present invention has been made in consideration of the above-mentioned circumstances, and has an objective of providing a battery operation system, a battery operation method, and a program that can reduce the possibility of interrupting a deterioration diagnosis when performing a deterioration diagnosis of a battery while executing a predetermined charging and discharging plan. [Means for solving the problem]

[0008] The battery operation system of an embodiment is a battery operation system that includes a site having a PCS and multiple sets of one or more storage batteries connected to the PCS, which charges and discharges to an external system, and a management device that controls the site, and when the management device performs deterioration diagnosis by charging and discharging on some of the storage batteries, in order to execute a predetermined charge and discharge plan, if discharging is necessary to counteract the charging in the deterioration diagnosis, discharge is caused by at least one of the other storage batteries and, if the site is equipped with a generator, the generator, and if charging is necessary to counteract the discharging in the deterioration diagnosis, charge is caused by the other storage batteries. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram illustrating a first example of an overall configuration of a storage battery operation system according to an embodiment. [Diagram 2] FIG. 2 is a diagram illustrating a second example of the overall configuration of the storage battery operation system according to the embodiment. [Diagram 3] FIG. 3 is a block diagram illustrating a functional configuration of a management device and a site according to the embodiment. [Figure 4] FIG. 4 is a graph showing a case where the timing of the charge / discharge pattern for deterioration diagnosis is shifted. [Diagram 5]FIG. 5 is a table showing an example of the sequence of deterioration diagnosis of the storage battery. [Figure 6] FIG. 6 is a diagram showing an image of creating a charge and discharge plan. [Figure 7] FIG. 7 is a table showing storage battery information. [Figure 8] FIG. 8 is a flowchart illustrating a process performed by the management device according to the embodiment. [Figure 9] FIG. 9 is a diagram showing an overall configuration of a virtual power plant according to an embodiment. [Figure 10] FIG. 10 is a diagram showing an overall configuration of a storage battery operation system assuming a virtual power plant in an embodiment. [Figure 11] FIG. 11 is a block diagram showing the functional configuration of a management device and a site when a virtual power plant is assumed in the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, embodiments of a storage battery operation system, a storage battery operation method, and a program according to the present invention will be described with reference to the drawings.

[0011] FIG. 1 is a diagram showing a first example of the overall configuration of a storage battery operation system S of an embodiment. In this first example, a large-scale storage battery operation system is assumed. The large-scale storage battery operation system is a system that uses a grid storage battery and has a function of charging when the price of electricity is low and discharging when the price of electricity is high. The storage battery operation system S includes a management device 7 and a site 3.

[0012] The site 3 includes a PCS (Power Conditioning System) 5 and a plurality of sets of one or more storage batteries 6 connected to the PCS 5, and charges and discharges a bus 1 connected to an external system. A management device 7 controls the site 3.

[0013] The functions of the management device 7 are summarized as follows. When the management device 7 performs deterioration diagnosis by charging and discharging some of the storage batteries 6, if discharging is necessary to cancel out the charging in the deterioration diagnosis in order to execute a predetermined charge and discharge plan, it causes discharging by at least one of the other storage batteries 6 and, if the site 3 is equipped with a generator, the generator. Also, if charging is necessary to cancel out the discharging in the deterioration diagnosis, it causes charging by the other storage batteries 6.

[0014] Furthermore, the management device 7 may perform deterioration diagnosis on a plurality of storage batteries 6 simultaneously.

[0015] Furthermore, the management device 7 designates one or more storage batteries 6 to be subjected to deterioration diagnosis, and sets and plans a charging and discharging pattern for the deterioration diagnosis.

[0016] The site 3 may also be equipped with a generator using thermal power, hydroelectric power, wind power, solar power, or the like. In this case, when the management device 7 determines that the charge / discharge plan cannot be executed if the deterioration diagnosis is continued while the deterioration diagnosis is being executed based on the charge / discharge plan, the management device 7 interrupts the deterioration diagnosis midway. Specifically, for example, the amount of power generated by the renewable energy generator (naturally variable power source such as solar power or wind power) falls below the prediction, or the remaining charge amount (hereinafter, also simply referred to as "remaining amount") of the storage battery 6 becomes less than the charge / discharge plan because charging was not performed according to the charge / discharge plan, making it impossible to continue the deterioration diagnosis. As an example of not charging according to the charge / discharge plan, for example, when creating a charge / discharge plan, a charge / discharge plan is created including charging / discharging for the purpose of so-called arbitrage (arbitrage trading: charging from the grid when electricity is cheap and selling when electricity is expensive) based on a power price prediction, and when the actual power price is higher than the prediction or the actual power price is lower than the prediction, the charging time period for arbitrage may be changed or charging may be stopped.

[0017] In addition, when the management device 7 is in the middle of performing a deterioration diagnosis based on the charge / discharge plan, and determines that the amount of power generated by the generator or the remaining charge of the storage battery 6 has increased more than predicted, making it possible to perform a deterioration diagnosis of another storage battery 6, the management device 7 performs the deterioration diagnosis of the other storage battery 6 ahead of schedule.

[0018] Furthermore, when the management device 7 becomes able to execute the deterioration diagnosis again for the storage battery 6 after the deterioration diagnosis has been interrupted midway, the management device 7 resumes the deterioration diagnosis from the middle or from the beginning. Note that whether the deterioration diagnosis is resumed midway or from the beginning is determined in advance for each charge / discharge pattern, for example.

[0019] In addition, when appropriate deterioration diagnosis is possible even if the charge / discharge pattern for deterioration diagnosis is divided in the time direction, the management device 7 may divide the charge / discharge pattern for deterioration diagnosis in the time direction and execute the deterioration diagnosis. Note that whether appropriate deterioration diagnosis is possible even if the charge / discharge pattern for deterioration diagnosis is divided in the time direction is determined in advance for each charge / discharge pattern, for example.

[0020] Furthermore, the management device 7 determines the order in which the deterioration diagnosis is performed on the storage batteries 6 based on at least one of the power transmission distance, the frequency of use, and the number of years of use.

[0021] The following describes in detail the storage battery operation system S. The site 3 includes PCSs 5A to 5H and storage batteries 6A to 6H. A management device 7 creates control data for the site 3, and transmits the control data to a site command device 9 via a network 8.

[0022] The site command device 9 sends control commands to the PCSs 5A to 5H based on the received control data. The power charged and discharged from the storage batteries 6A to 6H under the control of the PCSs 5A to 5H has its voltage changed by the station transformers 4A and 4B and the main transformer 2, and is charged and discharged to the bus bar 1.

[0023] The storage batteries 6A to 6H are storage batteries such as lithium ion batteries.

[0024] For example, when performing deterioration diagnosis on the storage battery 6A, the management device 7 predicts demand and creates a charge / discharge plan for the site 3. Then, the management device 7 performs charging / discharging for deterioration diagnosis on the storage battery 6A, and creates a charge / discharge plan that allows operation by charging / discharging one or more of the storage batteries 6B to 6H, thereby achieving deterioration diagnosis and operation at the same time.

[0025] 2 is a diagram showing a second example of the overall configuration of the storage battery operation system S of the embodiment. In FIG. 2, a simplified configuration is shown in order to provide a detailed description of the storage battery operation system S.

[0026] 3 is a block diagram showing the functional configuration of the management device 7 and the site 3 according to the embodiment. FIG. 3 corresponds to FIG.

[0027] The management device 7 is a computer including, for example, a central processing unit (CPU), a random access memory (RAM), a read only memory (ROM), a solid state drive (SSD), etc. Each component of the management device 7 will be described.

[0028] The deterioration diagnosis charge / discharge pattern setting unit 102 sets a charge / discharge pattern for deterioration diagnosis. The demand prediction unit 103 predicts the demand for power. The power generation prediction unit 104 predicts the amount of power generation.

[0029] The diagnosis order calculation unit 105 determines the order of deterioration diagnosis of the storage batteries 6. The first planning unit 106 and the second planning unit 108 create a charge and discharge plan (described in detail later).

[0030] The command transmission unit 109 transmits the charge / discharge plan created by the first planner 106 or the second planner 108 to the site 3 .

[0031] The measurement value transmitting unit 92 transmits the measurement values ​​of the charge and discharge of the storage batteries 6A to 6C at the site 3 to the measurement value receiving unit 117 of the management device 7. The interruption calculation unit 118 determines whether or not to interrupt the charge and discharge for the deterioration diagnosis. The memory unit 107 stores the charge and discharge plan, the measurement values ​​of the charge and discharge, the charge and discharge pattern for the deterioration diagnosis, etc.

[0032] There are multiple types of charge / discharge patterns for deterioration diagnosis. Therefore, the deterioration diagnosis charge / discharge pattern setting unit 102 can set any charge / discharge pattern for deterioration diagnosis. Also, a different charge / discharge pattern can be set for each storage battery 6 unit.

[0033] The degree of deterioration of the storage battery 6 varies depending on the number of years of use and the frequency of use, and since the storage battery 6 is not very deteriorated at the beginning of operation, there is no strong need to perform deterioration diagnosis. On the other hand, a storage battery 6 that has been used for a long time or has been used frequently is prone to deterioration, so deterioration diagnosis needs to be performed more frequently. The diagnosis order calculation unit 105 determines the order in which the deterioration diagnosis is performed on the storage batteries 6 taking these differences into consideration, and reflects the order in the charge / discharge plan including the deterioration diagnosis.

[0034] The first planning unit 106 acquires the demand forecast result from the demand forecasting unit 103 and the power generation forecast result from the power generation forecasting unit 104, creates a charge / discharge plan that does not perform degradation diagnosis, and stores it in the storage unit 107. Hereinafter, the "first charge / discharge plan" means a charge / discharge plan that does not perform degradation diagnosis, and the "second charge / discharge plan" means a charge / discharge plan that can be operated while performing charging / discharging for degradation diagnosis.

[0035] The second planning unit 108 creates a second charge / discharge plan based on the first charge / discharge plan. When creating the second charge / discharge plan, the second planning unit 108 acquires the first charge / discharge plan, the power generation prediction result, the order of the storage batteries 6 to be diagnosed with deterioration, the charge / discharge pattern for deterioration diagnosis, and the like from the storage unit 107 in order to calculate resources other than the storage batteries 6 to be diagnosed with deterioration. The second planning unit 108 then calculates a surplus (remaining capacity) of resources from the difference between the first charge / discharge plan and the power generation prediction, and calculates resources that can substitute for the storage batteries 6 to be diagnosed with deterioration based on the surplus of resources, the order of the storage batteries 6 to be diagnosed with deterioration, the charge / discharge pattern for deterioration diagnosis, and the like.

[0036] Here, Fig. 4 is a graph showing a case where the timing of the charge / discharge pattern for deterioration diagnosis is shifted. In the case where deterioration diagnosis is possible even if the timing of a part of the charge / discharge pattern for deterioration diagnosis is shifted (from time t1 to time t2) as shown in (a) and (b) of Fig. 4, the charge / discharge timing of the charge / discharge pattern for deterioration diagnosis is changed according to the surplus of resources.

[0037] Then, the second planning unit 108 creates a second charge / discharge plan in accordance with the first charge / discharge plan based on the order of the storage batteries 6 to be diagnosed with deterioration and resources that can perform charging / discharging, and so on, and stores the second charge / discharge plan in the memory unit 107.

[0038] The second planning unit 108 can also create a second charge / discharge plan for simultaneously performing charging / discharging for deterioration diagnosis on a plurality of storage batteries 6. On the other hand, when the second planning unit 108 is unable to create the second charge / discharge plan due to a lack of resources that can substitute for charging / discharging, the second planning unit 108 does not create the second charge / discharge plan.

[0039] The command transmitting unit 109 transmits the second charge / discharge plan stored in the memory unit 107 to the control command unit 91 of the site 3. If the second charge / discharge plan has not been created, the command transmitting unit 109 transmits the first charge / discharge plan to the control command unit 91 of the site 3.

[0040] The site command device 9 includes a control command unit 91 and a measurement value transmission unit 92. The control command unit 91 transmits control commands to the PCSs 5A-5C based on the charge / discharge plan (first charge / discharge plan or second charge / discharge plan) received from the command transmission unit 109, and controls the charge / discharge of the storage batteries 6A-6C. In addition, the measurement value transmission unit 92 transmits the measurement results of the charge / discharge of the storage batteries 6A-6C by the measurement units 52A-52C to the measurement value reception unit 117 of the management device 7. The storage unit 107 stores the measurement results of the charge / discharge.

[0041] When control command unit 91 is performing control based on the second charge / discharge plan, interruption calculation unit 118 acquires the second charge / discharge plan and the measured values ​​of charge / discharge of storage batteries 6A-6C from memory unit 107, and if resources that can substitute for charge / discharge are insufficient compared to the calculated values ​​at the time of planning based on that data, interruption calculation unit 118 sends a command to interrupt deterioration diagnosis to command transmission unit 109. Then, first planning unit 106 and second planning unit 108 re-create charge / discharge plans corresponding to the actual surplus of resources, and send the charge / discharge plans to control command unit 91 again.

[0042] 5 is a table showing an example of the order of deterioration diagnosis of the storage battery 6. The diagnosis order calculation unit 105 determines the order of deterioration diagnosis of the storage battery 6 based on, for example, the following criteria 1 to 3. (Criteria 1) Determine the timing of deterioration diagnosis based on the number of years of operation of the storage battery 6 (for example, once every three months for less than one year of operation, once a month for the second year and after) (Criteria 2) Oldest first (Criterion 3) Items for which deterioration diagnosis has been interrupted are given priority.

[0043] As a result, for example, the order of deterioration diagnosis is determined to be the order of batteries A to E, as shown in FIG.

[0044] 6 is a diagram showing an image of charge / discharge plan creation. Reference symbol C1 indicates a charge / discharge plan for deterioration diagnosis. Reference symbols C2 to C5 indicate charge / discharge plans for surplus capacity.

[0045] Moreover, reference symbol D1 indicates a charge / discharge plan for canceling (offsetting) the charge / discharge of the deterioration diagnosis. Moreover, reference symbols D2 to D5 indicate that the charge / discharge plan of reference symbol D1 is allocated to storage batteries B2 to B4.

[0046] The management device 7 checks the charging and discharging of the surplus capacity of each storage battery 6 and power plant, and creates a charging and discharging plan to offset the total. When calculating the charging and discharging of the surplus capacity, for example, it can be calculated based on the idea that "plan considering supply and demand balance" - "power generation plan" = "surplus power generation amount." In addition, for example, prediction results by AI (Artificial Intelligence) may be used as the "plan considering supply and demand balance" and the "power generation plan."

[0047] Next, Fig. 7 is a table showing storage battery information. Here, we consider optimizing the plan for the surplus power to be used. The purpose of this is to reduce the waste of electricity (transmission loss) and to avoid concentration of the frequency of use of the storage battery 6 and the generator.

[0048] Examples of optimization rules are the following rules 1 and 2. (Rule 1) Select the battery with the shortest distance from the storage battery 6 that is undergoing deterioration diagnosis (reduce transmission loss) (Rule 2) Select the smaller value of frequency of use x number of years of use (avoid concentration of frequency of use)

[0049] In the example of FIG. 7, of (a) and (b), the storage battery 6 in (a) which has the shorter distance (power transmission distance) is selected.

[0050] Next, Fig. 8 is a flowchart showing the process performed by the management device 7 according to the embodiment. Note that it is assumed here that the first planning unit 106 has already created the first charge and discharge plan.

[0051] In step S1, the diagnosis order calculation unit 105 determines the order in which the deterioration diagnosis is to be performed on the storage batteries 6.

[0052] Next, in step S2, the second planning unit 108 creates a second charge / discharge plan based on the first charge / discharge plan and the like.

[0053] Next, in step S3, the interruption calculation unit 118 judges whether or not it is possible to continue the deterioration diagnosis during the execution of the charge / discharge plan, and if it is possible, the process proceeds to step S4, and if it is not possible, the process proceeds to step S5.

[0054] In step S4, the management device 7 continues to execute the degradation diagnosis. When the management device 7 completes the degradation diagnosis in step S6, the process returns to step S1.

[0055] In step S5, the command transmitting unit 109 transmits a control signal to the site 3 to stop charging and discharging for deterioration diagnosis, and the process returns to step S1.

[0056] Next, Fig. 9 is a diagram showing the overall configuration of a virtual power plant 300 (VPP (Virtual Power Plant)) according to an embodiment. As shown in Fig. 9, the present invention is also applicable to a configuration in which various types of charging and discharging resources are bundled together, such as a plurality of sites 3A and 3B connected to a grid 200, such as the virtual power plant 300 (VPP).

[0057] Next, Fig. 10 is a diagram showing the overall configuration of a battery operation system S in an embodiment assuming a virtual power plant. The difference from Fig. 2 is that there is one more site 3, making two, and that there is a battery storage system 11 (such as a hydrogen battery system) and generators 10A and 10B (such as thermal power generators) as charging and discharging resources.

[0058] This storage battery operation system S includes PCSs 5A and 5B, storage batteries 6A and 6B, generators 10A and 10B, and a storage system 11. A management device 7 creates control data for sites 3A and 3B, and transmits the control data to site command devices 9A and 9B via a network 8.

[0059] The site command device 9A sends control commands to the PCSs 5A and 5B and the generator 10A based on the received control data. The power charged and discharged in the storage batteries 6A and 6B has its voltage changed by the station transformer 4A and the main transformer 2A, and is charged and discharged in the bus bar 1.

[0060] Based on the received control data, the site command device 9B sends control commands to the generator 10B and the power storage system 11. The voltage of the power charged and discharged from the generator 10B and the power storage system 11 is changed by the station transformer 4B and the main transformer 2B, and the power is charged and discharged to the bus bar 1.

[0061] 11 is a block diagram showing the functional configuration of the management device 7 and the site 3 in a case where a virtual power plant is assumed in the embodiment. Differences from FIG. 3 will be described.

[0062] The site 3A includes an output control device 119A and a generator 10A. The output control device 119A includes a control unit 120A and a measurement unit 121A.

[0063] The site 3B includes output control devices 119B and 119C, a power generator 10B, and a power storage system 11. The output control device 119B includes a control unit 120B and a measurement unit 121B. The output control device 119C includes a control unit 120C and a measurement unit 121C.

[0064] Thus, according to the storage battery operation system S of the present embodiment, unlike the conventional technology in which storage battery operation including deterioration diagnosis is performed by controlling resources below the PCS, by controlling many resources subordinate to multiple PCSs, it is possible to reduce the possibility of interrupting deterioration diagnosis when performing deterioration diagnosis of a storage battery while executing a predetermined charge / discharge plan. In other words, compared to the conventional technology, it is possible to utilize many storage battery resources, resources of generators and storage systems other than storage batteries, and resources of other sites, and to significantly reduce resource shortages due to deterioration diagnosis.

[0065] In addition, by sending control commands to the PCS to control charging and discharging, control is possible without modifying the PCS when implementing an off-the-shelf PCS, thereby reducing development costs.

[0066] Furthermore, for example, if N storage batteries 6 to be controlled are added, resources equivalent to the capacity of the storage batteries 6×N can be secured, and resource shortages can be further suppressed.

[0067] In addition, assuming a virtual power plant (VPP), for example, as shown in Fig. 10, when controlling the storage battery 6A to perform charging and discharging for deterioration diagnosis, the storage battery 6B, generators 10A and 10B, and storage system 11 can be used as charging and discharging resources in place of the storage battery 6A. In other words, generators and storage systems other than the storage battery can be used as charging and discharging resources in place of the storage battery 6A, which not only resolves resource shortages but also reduces the amount of use of the storage battery 6, thereby having the effect of mitigating deterioration of the storage battery 6.

[0068] Furthermore, by controlling many resources, it becomes easy to simultaneously perform deterioration diagnosis on a plurality of storage batteries 6.

[0069] In addition, when the deterioration diagnosis is being performed based on the charge / discharge plan and it is determined that the charge / discharge plan cannot be executed if the deterioration diagnosis is continued, the deterioration diagnosis is interrupted midway. This makes it possible to reduce the impact on the operation of the storage battery 6.

[0070] In addition, when the amount of power generated by the generator or the remaining charge of the storage battery 6 is greater than predicted while the deterioration diagnosis is being performed based on the charge / discharge plan, if it is determined that deterioration diagnosis of another storage battery 6 is also possible, the deterioration diagnosis of the other storage battery 6 is performed ahead of schedule. This allows the deterioration diagnosis of the storage battery 6 to be performed earlier.

[0071] In addition, when the deterioration diagnosis of the storage battery 6 is interrupted midway and it becomes possible to perform the deterioration diagnosis again later, the deterioration diagnosis is preferentially resumed from the middle or from the beginning. This makes it possible to appropriately deal with the interruption of the deterioration diagnosis.

[0072] In addition, by dividing the charge / discharge pattern for deterioration diagnosis in the time direction depending on the situation and executing the deterioration diagnosis, the impact on the operation of the storage battery can be reduced.

[0073] Furthermore, by determining the order in which the deterioration diagnosis is performed on the storage batteries 6 based on at least one of the power transmission distance, the frequency of use, and the number of years of use, an appropriate diagnosis order can be achieved.

[0074] The programs executed by the management device 7 of this embodiment and the like are provided in the form of files in an installable or executable format recorded on a computer-readable recording medium such as a USB memory, a semiconductor storage device such as an SSD, or a DVD (Digital Versatile Disk).

[0075] The program may be stored on a computer connected to a network such as the Internet and provided by being downloaded via the network. The program may be provided or distributed via a network such as the Internet.

[0076] The program may also be provided in a state where it is pre-installed in a ROM or the like.

[0077] The program has a modular configuration including the above-mentioned components (such as the deterioration diagnosis charge / discharge pattern setting unit 102). The CPU (processor) reads out the program from the storage medium and executes it, whereby the above-mentioned components are loaded and generated on the main storage device.

[0078] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0079] 1...busbar, 2...main transformer, 3...site, 4...station transformer, 5...PCS, 6...storage battery, 7...management device, 8...network, 9...site command device, 10...generator, 11...energy storage system, 51...control unit, 52...measurement unit, 91...control command unit, 92...measurement value transmission unit, 102...deterioration diagnosis charge / discharge pattern setting unit, 103...demand forecasting unit, 104...power generation forecasting unit, 105...diagnosis order calculation unit, 106...first planning unit, 107...memory unit, 108...second planning unit, 109...command transmission unit, 117...measurement value receiving unit, 118...interruption calculation unit, 119...output control device, 120...control unit, 121...measurement unit, S...battery operation system

Claims

1. A storage battery operation system including a site including a PCS (Power Conditioning System), one or more storage batteries connected to the PCS, and charging / discharging to / from an external system, and a management device that controls the site, A battery operation system in which, when performing a deterioration diagnosis by charging and discharging on some of the storage batteries, in order to execute a predetermined charging and discharging plan, if discharging is necessary to counteract the charging in the deterioration diagnosis, the management device discharges using at least one of the other storage batteries and, if the site is equipped with a generator, the generator, and if charging is necessary to counteract the discharging in the deterioration diagnosis, the management device charges using the other storage batteries.

2. The battery operation system according to claim 1 , wherein the management device simultaneously performs deterioration diagnosis on the plurality of storage batteries.

3. The battery operation system according to claim 1 , wherein the management device specifies one or more of the storage batteries to be subjected to deterioration diagnosis, and sets and plans a charging and discharging pattern for the deterioration diagnosis.

4. the site includes a generator; The battery operation system of claim 1, wherein the management device interrupts the deterioration diagnosis midway when, while performing a deterioration diagnosis based on the charge / discharge plan, it determines that the amount of power generated by the generator or the remaining charge of the storage battery has decreased more than predicted, and that continuing the deterioration diagnosis would make it impossible to execute the charge / discharge plan.

5. the site is equipped with a renewable energy generator; The battery operation system of claim 1, wherein when the management device is in the middle of performing a deterioration diagnosis based on the charge / discharge plan, it determines that the amount of power generated by the generator or the remaining charge of the storage battery has increased more than predicted, making it possible to perform a deterioration diagnosis of another storage battery, and performs the deterioration diagnosis of the other storage battery ahead of schedule.

6. The battery operation system of claim 4 , wherein the management device resumes the deterioration diagnosis of the storage battery from the middle or from the beginning when the deterioration diagnosis is interrupted midway and it becomes possible to perform the deterioration diagnosis again thereafter.

7. The battery operation system of claim 1 , wherein the management device divides the charge / discharge pattern of the deterioration diagnosis in the time direction and performs the deterioration diagnosis when appropriate deterioration diagnosis is possible even if the charge / discharge pattern of the deterioration diagnosis is divided in the time direction.

8. The battery operation system according to claim 1 , wherein the management device determines an order in which the storage batteries are to be diagnosed for deterioration based on at least one of a power transmission distance, a frequency of use, and a number of years of use.

9. A storage battery operation method using a storage battery operation system including a PCS, a site including a plurality of sets of one or more storage batteries connected to the PCS, and charging / discharging to / from an external system, and a management device that controls the site, A storage battery operation method in which, when the management device performs a deterioration diagnosis by charging and discharging some of the storage batteries, if discharging is necessary to counteract the charging in the deterioration diagnosis in order to execute a predetermined charging and discharging plan, discharging is performed using at least one of the other storage batteries and, if the site is equipped with a generator, the generator, and if charging is necessary to counteract the discharging in the deterioration diagnosis, charging is performed using the other storage batteries.

10. A storage battery operation system including a site including a PCS and a plurality of sets of one or more storage batteries connected to the PCS, which charges and discharges to and from an external system, and a management device that controls the site, A program for realizing the function of, when performing deterioration diagnosis by charging and discharging some of the storage batteries, discharging using at least one of the other storage batteries and, if the site is equipped with a generator, the generator if discharging is necessary to counteract the discharging in the deterioration diagnosis in order to execute a predetermined charging and discharging plan, and charging using the other storage batteries if charging is necessary to counteract the discharging in the deterioration diagnosis.

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