JP6069738B2 - Charge / discharge control system, charge / discharge control method, and charge / discharge control program - Google Patents

Description

  The present invention relates to a charge / discharge control system, a charge / discharge control method, and a charge / discharge control program, and more specifically, accurate charge / discharge control in a grid-connected power storage device according to a changing power supply / demand situation. It is related with the technique which enables execution continuously.

  Prior to the full implementation of electricity liberalization, with conventional general electric utilities such as independent power generation companies such as PPS (specific electricity companies) and ordinary households that generate small-scale power generation using renewable energy such as solar power The number of power generation entities with significantly different scales is increasing. Electricity generated by such power generation entities is supplied to the commercial grid by so-called grid interconnection, reducing the power supply reserves for general electric utilities, mutual transmission / distribution abnormalities, sudden power demands, etc. It will lead to various technical and economic effects such as flexibility. On the other hand, however, various problems such as a decrease in quality due to the inflow of electric power whose quality is not constant and an increase in fluctuations in the power supply / demand divergence are recognized as various power generation entities perform grid interconnection.

  The following is proposed as one of the prior arts focusing on the problems associated with such grid interconnection. That is, a grid-connected power generator that generates power using natural energy and is connected in parallel with a commercial power system for the purpose of reducing power costs (electricity charges) while saving power (energy saving) A power storage device that converts AC power fed from a commercial power system to DC power, charges and discharges, converts DC power that has been discharged into AC power, and feeds the load, and a control device that controls charging and discharging of the power storage device And the control device predicts the power generation amount of the power generation device and the load power demand on the next day, and when the predicted value of the power generation amount is lower than the predicted power demand value, the electricity price of the commercial power system is relatively low. The grid-connected power supply system is characterized in that the power storage device is charged in a band and the power storage device is not charged in the time zone when the predicted value of the amount of power generation does not fall below the predicted value of power demand (see Patent Document 1) Etc. have been proposed.

JP 2011-72166 A

  In the prior art, it is possible to perform control such as determining whether or not charging is necessary according to the supply and demand forecast for the next day and specifying the charging time zone based on the electricity charge for each time zone for the grid-connected power storage device. is there. However, various factors such as weather conditions and consumer trends change from time to time, and it is not easy to predict power supply and demand with high accuracy. Therefore, when charging / discharging control of a power storage device is performed based on such accurate demand / supply forecasts, excessive or completely insufficient charge / discharge, which is different from the actual supply / demand situation at each time point, is performed on the system. It might be. On the other hand, the capacity of each power storage device currently used is very small compared to the amount of power flowing through the system.

  Therefore, even if charging / discharging by the power storage device is planned / executed as a means of eliminating the imbalance in power supply / demand predicted for a certain future, if there is a discrepancy between the power supply / demand prediction as a base and the actual supply / demand situation Therefore, it is very difficult to cover the power increase / decrease corresponding to the deviation by the charge / discharge control of the power storage device as it is. In addition, the power that cannot be handled by the charge / discharge control of the power storage device is procured from the commercial system at a high cost, which may lead to an economic loss that cannot be ignored for small-scale power generation companies such as PPS.

  In other words, taking into account the above-mentioned problems together, it is not possible to accurately perform charge / discharge control of power storage devices with limited capacity for the ever-changing power supply and demand situation, and in fact, it is adopted as a practical technology A possible charge / discharge control method has not been proposed.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a technique that enables accurate charge / discharge control in a grid-connected power storage device to be continuously executed in accordance with a changing power supply / demand situation.

  The charge / discharge control system of the present invention that solves the above-described problem relates to power supply and demand prediction information for a predetermined first period predicted at a predetermined first time point regarding an electric power network including a plurality of power generation devices, storage batteries, and loads, and the first A storage device storing charge rate information of the storage battery at one time point, and a charge / discharge plan of the storage battery in the power network that minimizes fluctuations in the supply and demand relationship indicated by the power supply and demand prediction information at the first time point, Generated by a predetermined algorithm under the limitation of the capacity range of the storage battery, stores the generated charge / discharge plan for the first period in a storage device, and instructs the storage battery to charge / discharge based on the charge / discharge plan for the first period And a power supply and demand forecast for a predetermined second period based on predetermined information obtained for the power network at a second time point after a predetermined time from the first time point, The acquisition of storage battery charge rate information at two time points is executed by a predetermined algorithm, and based on the power supply / demand forecast for the second period obtained at the second time point and storage battery charge rate information, at the second time point. A charge / discharge plan for the storage battery in the power network that minimizes fluctuations in the supply and demand relationship indicated by the power supply and demand prediction information of the power supply is generated by a predetermined algorithm under the limitation of the capacity range of the storage battery, and the generated second period And an arithmetic unit that stores a charge / discharge plan in a storage device and executes secondary processing for notifying the storage battery of a charge / discharge instruction based on the charge / discharge plan for the second period.

  According to this, it is possible to repeat the storage battery charge / discharge plan generation based on the latest power supply and demand forecast and the charge rate of each storage battery at predetermined time intervals, and fix the charge / discharge plan at a certain point in time. Therefore, it is possible to continuously execute accurate charge / discharge control that fits the changing power supply and demand situation with respect to the storage battery.

  In the above-described charge / discharge control system, the arithmetic unit may perform each process in the secondary process as a future next process related to a predetermined future period at a future time point in the future from the second time point, based on occurrence of a predetermined event. May be repeated sequentially.

  According to this, it is possible to generate storage battery charge / discharge plans based on the latest power supply / demand forecast and the charging rate of each storage battery, to generate predetermined events such as sudden changes in the power supply / demand situation and reception of instructions from system administrators. Accurate charging / discharging that can be repeated according to the situation, updated accurately according to the situation without using the charging / discharging plan at a certain point in time, and more efficiently adapted to the changing power supply / demand situation Control can be continuously performed with respect to the storage battery.

  Moreover, in the above-described charging / discharging control system, when the arithmetic unit detects that the deviation of the charging state between the rechargeable batteries exceeds a predetermined reference for a predetermined time as a result of monitoring the charging state of each storage battery in the power network. , When it is detected that the deviation between the power demand prediction indicated by the power supply / demand prediction information and the actual power demand amount in the power network exceeds a predetermined standard, and the renewable energy power generation amount prediction indicated by the power supply / demand prediction information And the actual amount of power demand in the power network or the amount of change per hour in the amount of renewable energy generated in the power network is predetermined. When it is detected that the standard has been exceeded or at least one of the following situations, the secondary processing and future time points after that May be is to perform at least one of the processing of each processing.

  According to this, charging / discharging plan generation based on the latest power supply / demand forecast and the charging rate of each storage battery, charging / discharging such as transition of actual charging status in the entire storage battery and deviations beyond the standard of power supply / demand relations, etc. It is possible to repeat the plan according to the situation that needs to be reconsidered, and without changing the charging / discharging plan at a certain point in time, it can be updated accurately according to various situations in the power grid, and changing power Accurate charge / discharge control that more efficiently fits the supply and demand situation can be continuously performed for the storage battery.

  In the above-described charge / discharge control system, the arithmetic unit performs charge / discharge control to minimize fluctuations in the supply and demand relationship in at least one of the primary process, the secondary process, and the future process. When it becomes clear that the restrictions on the capacity range of the storage battery cannot be observed, and when the power supply plan indicated by the power supply and demand forecast information changes more than a predetermined standard, In addition, a process of notifying an alarm to a predetermined device may be further executed.

  For example, while there is a situation where each storage battery is charged to near the capacity upper limit at a certain point in each of the above-described processes, it is necessary to temporarily store surplus power by charging the storage battery at a certain point in the future. When a certain power grid supply / demand situation is assumed, a charge / discharge plan based on the above-mentioned restrictions cannot be generated / executed. To prompt the implementation of measures to appropriately reduce the amount of power generation during the period from the latest to the relevant future, or, as the above-mentioned notification, issue a bid amount control instruction to the power bidding system, and balance the supply and demand in the relevant period. Pre-adjustment can be made to reduce the need for charging the storage battery. In addition, while there is a situation where charging at each storage battery is performed only to near the lower limit of capacity at a certain point in each of the above-described processes, at a later point in time in the future, insufficient power in the power grid is reduced by discharge from the storage battery. In the case of a power grid supply / demand situation that needs to be partially covered, it is impossible to generate and execute a charge / discharge plan based on the above-mentioned restrictions. Notify the person, etc., to encourage the implementation of measures to increase the amount of power generation during the period from the latest to the relevant future, or to give a bid amount increase instruction to the power bidding system as the above notification. It is possible to cope with the need for pre-adjusting the supply / demand balance of the battery and reducing the need for discharging the storage battery.

  Further, in the above charge / discharge control system, the storage device further stores each data of a discharge suppression occurrence time and a discharge upper limit power value as a discharge suppression occurrence history for each storage battery in the power network, When generating the charge / discharge plan for at least one of the primary process, the secondary process, and the future process, the apparatus uses the information on the charge / discharge timing determined for each storage battery as the occurrence history of the discharge suppression. In comparison, with respect to the storage battery whose occurrence history of discharge suppression has been found at the corresponding charge / discharge timing, the discharge upper limit power value of the corresponding storage battery indicated by the corresponding occurrence history is compared with the planned discharge power value determined for the corresponding storage battery, When the planned discharge power value exceeds the discharge upper limit power value, a difference between the planned discharge power value and the discharge upper limit power value is calculated, and the difference is calculated. The other storage battery capable of discharging one or a plurality of the electric energy is specified based on the discharge capacity indicated by the charge rate information, and all or one of the differences is added to the discharge plan of the specified one or more other storage batteries. The process of adding the discharge corresponding to the unit may be further executed.

  According to this, based on the fact that the actual chargeable power and dischargeable power of each storage battery depend on the status of the distribution line to which the storage battery is connected and the power consumption of consumers connected to the same distribution line. Based on the discharge suppression history in the storage battery to be charged / discharge controlled, the schedule creation target time, etc., it becomes possible to search and specify the storage battery taking into account the assumed chargeable / dischargeable amount and to generate the charge / discharge plan. As a result, accurate charge / discharge control that is more efficiently and accurately fitted to the changing power supply and demand situation can be continuously executed for the storage battery.

  Moreover, the charge / discharge control method of the present invention relates to power supply and demand prediction information for a predetermined first period predicted at a predetermined first time point for the power network including a plurality of power generation devices, storage batteries, and loads, and at the first time point. An information processing system comprising a storage device storing storage battery charge rate information minimizes fluctuations in the supply and demand relationship indicated by the power supply and demand prediction information at the first time point. The storage battery is generated by a predetermined algorithm under the restriction of the capacity range of the storage battery, the generated charge / discharge plan for the first period is stored in a storage device, and the storage battery is charged based on the charge / discharge plan for the first period. Predicting power supply and demand for a predetermined second period based on the primary processing for notifying the discharge instruction and the predetermined information obtained for the power network at the second time point after a predetermined time has elapsed from the first time point , Acquiring the charging rate information of the storage battery at the second time point by a predetermined algorithm, and based on the power supply and demand forecast of the second period and the charging rate information of the storage battery obtained at the second time point, The charging / discharging plan of the storage battery in the power network that minimizes the fluctuation of the supply and demand relation indicated by the power supply and demand prediction information at two time points is generated by a predetermined algorithm under the limitation of the capacity range of the storage battery, and the generated first A secondary process of storing a charge / discharge plan for two periods in a storage device and notifying the storage battery of a charge / discharge instruction based on the charge / discharge plan for the second period.

  In the charge / discharge control method described above, the information processing system may cause each process in the secondary process to occur as a next event related to a predetermined future period at a future time point in the future from the second time point. It is good also as repeating sequentially based on this.

  Further, in the above charge / discharge control method, when the information processing system detects that the charge state deviation between the rechargeable batteries exceeds a predetermined reference for a predetermined time as a result of monitoring the charge state of each storage battery in the power network. And when the deviation between the power demand forecast indicated by the power demand forecast information and the actual power demand in the power network exceeds a predetermined standard, and the renewable energy power generation quantity indicated by the power demand forecast information When it is detected that the difference between the prediction and the actual renewable energy power generation amount in the power network exceeds a predetermined standard, the actual power demand amount in the power network or the amount of change per hour in the renewable energy power generation amount is When it is detected that the predetermined standard is exceeded and at least one of the situations, the secondary processing and the future after that It may perform at least one of the processing of each processing point.

  In the charge / discharge control method described above, the information processing system performs charge / discharge control to minimize fluctuations in the supply and demand relationship during at least one of the primary process, the secondary process, and the future process. When it is performed, it is found that the limitation of the capacity range of the storage battery cannot be observed, and the power supply plan indicated by the power supply / demand forecast information changes at least one of a predetermined standard. At this time, a process of notifying an alarm to a predetermined device may be further executed.

  In the charge / discharge control method described above, the information processing system further stores, in the storage device, each data of a discharge suppression occurrence time and a discharge upper limit power value as a discharge suppression occurrence history for each storage battery in the power network. In the generation of the charge / discharge plan of at least one of the primary process, the secondary process, and the future process, the information on the charge / discharge timing determined for each storage battery is compared with the occurrence history of the discharge suppression. The discharge upper limit power value of the relevant storage battery indicated by the relevant occurrence history is compared with the planned discharge power value determined for the relevant storage battery, with respect to the storage battery whose occurrence history of discharge suppression has been found at the relevant charge / discharge timing. When the power value exceeds the discharge upper limit power value, the difference between the planned discharge power value and the discharge upper limit power value is calculated, and the difference is handled. The other storage battery capable of discharging one or a plurality of the electric energy is specified based on the remaining discharge capacity indicated by the charging rate information, and all or one of the differences is added to the discharge plan of the specified one or more other storage batteries. A process of adding a discharge corresponding to the part may be further executed.

  In addition, the charge / discharge control program of the present invention relates to power supply and demand prediction information for a predetermined first period predicted at a predetermined first time point regarding the power network including a plurality of power generation devices, storage batteries, and loads, and at the first time point. An information processing system including a storage device storing the storage battery charge rate information of the storage battery is provided with a charge / discharge plan for the storage battery in the power network that minimizes fluctuations in the supply and demand relationship indicated by the power supply and demand prediction information at the first time point. The storage battery is generated by a predetermined algorithm under the restriction of the capacity range of the storage battery, the generated charge / discharge plan for the first period is stored in a storage device, and the storage battery is charged based on the charge / discharge plan for the first period. Based on the primary processing for notifying the discharge instruction and the predetermined information obtained for the electric power network at the second time point after the first time point, the power demand in the predetermined second period The prediction and the acquisition of the storage battery charging rate information at the second time point are executed by a predetermined algorithm, and based on the power supply and demand prediction of the second period obtained at the second time point and the charging rate information of the storage battery, A charge / discharge plan for the storage battery in the power network that minimizes fluctuations in the supply and demand relationship indicated by the power supply and demand prediction information at the second time point is generated by a predetermined algorithm under the constraints of the capacity range of the storage battery, and the generated A charge / discharge plan for the second period is stored in a storage device, and a secondary process for notifying the storage battery of a charge / discharge instruction based on the charge / discharge plan for the second period is performed.

    In addition, the charge / discharge control program described above causes the information processing system to generate each predetermined process as a future process related to a predetermined future period at a future time point in the future from the second time point. It may be repeated sequentially based on this.

  In addition, when the charge / discharge control program described above monitors the charge state of each storage battery in the power grid in the information processing system, the charge / discharge control program detects that the charge state bias between rechargeable batteries exceeds a predetermined reference for a predetermined time. And when the deviation between the power demand forecast indicated by the power demand forecast information and the actual power demand in the power network exceeds a predetermined standard, and the renewable energy power generation quantity indicated by the power demand forecast information When it is detected that the difference between the prediction and the actual renewable energy power generation amount in the power network exceeds a predetermined standard, the actual power demand amount in the power network or the amount of change per hour in the renewable energy power generation amount is When it is detected that the predetermined standard is exceeded and at least one of the situations, the secondary processing and the future after that It may be executed at least one of the processing of each processing point.

  Further, the charge / discharge control program described above performs charge / discharge control on the information processing system so as to minimize fluctuations in the supply and demand relationship during at least one of the primary process, the secondary process, and the future process. When it is performed, it is found that the limitation of the capacity range of the storage battery cannot be observed, and the power supply plan indicated by the power supply / demand forecast information changes at least one of a predetermined standard. At this time, a process of notifying an alarm to a predetermined device may be further executed.

  Further, the above charge / discharge control program is stored in the information processing system further storing each data of the discharge suppression occurrence time and the discharge upper limit power value as the discharge suppression occurrence history for each storage battery in the power network in the storage device. When generating the charge / discharge plan for at least one of the primary process, the secondary process, and the future process, the information on the charge / discharge timing determined for each storage battery is compared with the occurrence history of the discharge suppression. The discharge upper limit power value of the corresponding storage battery indicated by the corresponding occurrence history is compared with the planned discharge power value determined for the corresponding storage battery with respect to the storage battery whose discharge suppression occurrence history has been found at the corresponding charge / discharge timing, and the expected discharge power If the value exceeds the discharge upper limit power value, calculate the difference between the scheduled discharge power value and the discharge upper limit power value, and handle the difference The other storage battery capable of discharging one or a plurality of the electric energy is specified based on the remaining discharge capacity indicated by the charging rate information, and all or one of the differences is added to the discharge plan of the specified one or more other storage batteries. A process of adding a discharge corresponding to the unit may be further executed.

  ADVANTAGE OF THE INVENTION According to this invention, according to the electric power supply-and-demand situation which changes, it becomes possible to perform the exact charging / discharging control in the grid-connected electrical storage apparatus continuously.

It is a figure which shows the example of the electric power network to which the charging / discharging control system of this embodiment is applied. It is a figure which shows the network structural example containing the charging / discharging control system in this embodiment. It is a figure which shows the hardware structural example of the charging / discharging control system in this embodiment. It is a figure which shows the data structural example of the climate prediction database of this embodiment. It is a figure which shows the data structural example of the electric power generation information database of this embodiment. It is a figure which shows the data structural example of the load information database of this embodiment. It is a figure which shows the data structural example of the storage battery information database of this embodiment. It is a figure which shows the example of a data structure of the demand-and-supply prediction information database of this embodiment. It is a figure which shows the data structural example of the charging / discharging plan database of this embodiment. It is a flowchart which shows process sequence example 1 of the charging / discharging control method of this embodiment. It is explanatory drawing which shows the time concept in the charging / discharging control method of this embodiment. It is a flowchart which shows process sequence example 2 of the charging / discharging control method of this embodiment. It is explanatory drawing which shows the discharge concept of the storage battery in the grid connection in this embodiment. It is a flowchart which shows process sequence example 3 of the charging / discharging control method of this embodiment.

--- Power network configuration ---

  Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram illustrating an example of a power network 1 to which the charge / discharge control system of the present embodiment is applied. The power grid 1 shown in FIG. 1 receives power supplied stably from a general electric power company and distributes it to a customer facility (load 4) as in the past, and an independent power generation company such as a specific scale electric power company. This is an electric power network that accepts the electric power generated by various methods and can provide the load 4 while adjusting the supply and demand fluctuation by the storage battery 10.

  Connected to the power network 1 are, for example, power generators 2 and 3 of a general electric utility and a specific scale electric utility, a plurality of storage batteries 10, and a load 4 as an electric device of a customer facility. In the example of the electric power grid 1 shown in FIG. 1, the thermal power generation apparatus 2 is illustrated as a power generation apparatus of a general electric utility. This thermal power generator 2 is a power generator capable of generating power as planned in advance regardless of natural conditions such as weather, temperature and humidity, and time zones. In addition to this, various kinds of power generation devices capable of stable power generation, such as nuclear power generation devices and geothermal power generation devices, can be assumed.

  On the other hand, as a power generation device of a specific scale electric power company, a device capable of stable power generation similar to the general electric power company described above can be assumed, but in this embodiment, a solar power generation apparatus that is a power generation apparatus using renewable energy 3 shall be shown. The solar power generation device 3 is a power generation device that cannot generate power at night and whose power generation amount fluctuates greatly according to sunlight conditions even during the daytime. In addition, as a power generator using such renewable energy, a wind power generator, a tidal power generator, or the like can be assumed.

  Further, the storage battery 10 connected to the power grid 1 is assumed to be various types of storage batteries including large and small batteries such as a NAS battery (sodium / sulfur battery), a redox flow battery, and a lithium ion battery.

On the other hand, the load 4 that receives and consumes the power generated by these various power generation devices 2 and 3 and the storage battery 10 via the power network 1 is provided in various facilities such as ordinary homes, office buildings, and factories. The power consumption tendency in each load 4 varies depending on various factors such as time zone, weather, temperature, humidity, composition of personnel in the facility, number, and type of electrical equipment.
--- System configuration ---

  Next, the configuration of the charge / discharge control system 100 applied to the above-described power network 1 will be described. FIG. 2 is a network configuration diagram including the charge / discharge control system 100 of the present embodiment. The charge / discharge control system 100 shown in FIG. 2 is a computer system that enables continuous accurate charge / discharge control in a grid-connected power storage device according to a changing power supply / demand situation.

  The charge / discharge control system 100 of the present embodiment is a server device that is managed and operated by, for example, a specific scale electric power company. For a specific scale electric power company, by using the charge / discharge control system 100, it is possible to avoid unintentional power purchase from the grid power source provided by the general electric power company in the power grid 1 as much as possible, and to maintain and maintain service quality. It aims to improve and reduce costs together.

  Such a charge / discharge control system 100 includes a thermal power generator 2 of a general electric company, a solar power generator 3 of a specific scale electric company, a storage battery 10, and the like via a network 5 that is an appropriate public network such as the Internet. And a customer facility 6 having a load 4, a weather data providing server 200, a user terminal 300 operated by a person in charge of an electric power company, an electric power bidding system 350 corresponding to an electronic market for electric power trading, etc. Data communication is possible indirectly through a person.

  Among them, the thermal power generation apparatus 2 and the solar power generation apparatus 3 are, in addition to a general power generation mechanism, power generation information including measurement data regarding an actual power generation status at regular intervals, a power generation plan created by the electric utility, and the like. 25 and 35 are transmitted to the charge / discharge control system 100 via the network 5. Therefore, each power generation device includes a power generation amount monitoring device, a storage device for storing the monitoring value in time series, and a communication device corresponding to the network 5 protocol. In this configuration, power generation information such as a power generation plan exists on the power generation device side, but information may be shared among a plurality of business operators.

  Further, each storage battery 10 has a function of measuring its own charging rate at regular intervals and transmitting the data to the charge / discharge control system 100 via the network 5 in addition to a general storage battery function. Therefore, each storage battery 10 includes a charging rate monitoring device, a storage device for storing the monitoring value in time series, and a communication device corresponding to the network 5 protocol.

  Each customer facility 6 is provided with a distribution board 41 for supplying power to the load 4 described above. The distribution board 41 measures the amount of power consumed by the load 4 in the corresponding facility, that is, the power consumption amount, by the watt-hour meter 42. The distribution board 41 described above has a communication function, and is connected to the server device that implements the charge / discharge control system 100 of the present embodiment via the network 5 so as to be communicable. The distribution board 41 uses the power consumption data measured by the watt hour meter 42 for a predetermined time as load information 45 and transmits it to the charge / discharge control system 100 every predetermined time. In addition, when using the watt-hour meter with a communication function like a smart meter, the watt-hour meter 42 is located between the distribution board 41 and a system | strain.

  In addition, the weather data providing server 200 provides the charge / discharge control system 100 with prediction data related to various weather phenomena such as weather, temperature, humidity, wind direction, wind speed, and sunshine every hour or every 3 hours within 24 hours from the present time. Server device. As for the weather forecasting method, etc., existing ones are provided as appropriate.

  Further, the user terminal 300 is an information processing terminal operated by the above-mentioned general electric utility or persons in charge of a specific scale electric enterprise, and is assumed to be a general PC. This user terminal 300 is also capable of data communication with the charge / discharge control system 100 via the network 5.

The power bidding system 350 is a server system corresponding to the electronic market for power trading, and is also connected to the charge / discharge control system 100 via the network 5 so that data communication is possible.
--- Hardware configuration ---

Next, the hardware configuration of the charge / discharge control system 100 of this embodiment will be described. FIG. 3 is a diagram illustrating a hardware configuration example of the charge / discharge control system 100 according to the present embodiment. The charge / discharge control system 100 illustrated in FIG. 3 includes a storage device 101 composed of appropriate nonvolatile storage elements such as a hard disk drive, a memory 103 composed of volatile storage elements such as RAM, and a program held in the storage device 101. 102 is read out to the memory 103 and executed to perform overall control of the device itself, as well as a calculation device 104 such as a CPU for performing various determinations, calculations and control processes, key inputs from users such as persons in charge of a specific scale electric power company, An input device 105 that receives voice input, an output device 106 such as a display that displays processing data, and a communication device 107 that is connected to the network 5 and performs communication processing with other devices. The storage device 101 stores at least databases 125 to 130 described later, in addition to a program 102 for implementing functions necessary for the charge / discharge control system 100 of the present embodiment.
--- Function ---

  Then, the function with which the charging / discharging control system 100 of this embodiment is provided is demonstrated. As described above, the functions described below are implemented, for example, by executing the program 102 included in the charge / discharge control system 100. Note that the storage device 101 of the charge / discharge control system 100 includes a predetermined first period predicted at a predetermined first time point for the power network 1 including the power generation devices 2 and 3, the storage batteries 10, and the loads 4. Supply / demand prediction information database 129 storing the power supply / demand prediction information of the battery and a storage battery information database 128 storing the charge rate information of each storage battery 10 at the first time point described above are stored in detail (both databases are detailed). Will be described later).

  The charge / discharge control system 100 according to the present embodiment reads the power supply / demand prediction information at the first time point from the above-described supply / demand prediction information database 129, and minimizes the fluctuation in the supply / demand relationship indicated by the power supply / demand prediction information. The charging / discharging plan of each storage battery 10 is generated by a predetermined algorithm under the limitation of the capacity range of each storage battery 10, and the generated charging / discharging plan for the first period is stored in the charging / discharging plan database 130 of the storage device 101, Moreover, it has a function which notifies a charge / discharge instruction | indication with respect to each applicable storage battery 10 based on the charging / discharging plan of each storage battery 10 regarding the above-mentioned 1st period. Processing executed by this function is referred to as primary processing.

  In addition, the charge / discharge control system 100 has the power generation amount and load 4 in the most recent predetermined period of each of the power generation devices 2 and 3 obtained for the power grid 1 at a second time point after a predetermined time has elapsed from the first time point described above. Based on various information such as the power consumption of each customer facility 6 in the most recent predetermined period, climate prediction information on the area where the power grid 1 is located, etc., the power supply / demand prediction in the predetermined second period and the above-mentioned second time point Acquisition of the charging rate information of each storage battery 10 is executed by a predetermined algorithm, and based on the power supply / demand prediction for the second period obtained at the second time point and the charging rate information of each storage battery 10, the power supply / demand at the second time point A charge / discharge plan for each storage battery 10 in the power grid 1 that minimizes fluctuations in the supply and demand relationship indicated by the prediction information is generated by a predetermined algorithm under the constraints of the capacity range of each storage battery 10, and each of the generated second periods The charging / discharging plan of the battery 10 is stored in the charging / discharging plan database 130 of the storage device 101, and charging / discharging is performed for each corresponding storage battery 10 based on the charging / discharging plan of each storage battery 10 related to the second period. It has a function of notifying instructions. Processing executed by this function is referred to as secondary processing.

  Further, the charge / discharge control system 100 has a function of sequentially repeating each process in the above-described secondary process as a future next process related to a predetermined future period from a second time point to a future time point based on occurrence of a predetermined event. . The predetermined event is as follows.

  First, as a result of monitoring the charging state of each storage battery 10 based on the charging rate information 15 obtained from each storage battery 10 in the power network 1 described above, the deviation of the charging state between the rechargeable batteries exceeded a predetermined reference for a predetermined time. This event is detected.

  One is an event that detects that the deviation between the power demand prediction indicated by the power supply and demand prediction information described above and the actual power demand amount in the power network 1 exceeds a predetermined standard.

  In addition, one is a renewable energy power generation amount prediction (in this embodiment, information on power generation amount prediction in the solar power generation device 3) indicated by the above power supply and demand prediction information, and an actual renewable energy power generation amount in the power network 1 It is an event that detects that the divergence of has exceeded a predetermined standard.

  One is an event that detects that the actual amount of power demand or the amount of renewable energy power generation in the power network 1 exceeds a predetermined reference.

  In addition, the charge / discharge control system 100 performs charge / discharge control to minimize fluctuations in the power supply / demand relationship in the power network 1 during at least one of the primary processing, secondary processing, and future processing described above. When it becomes clear that it is determined that the capacity range of each storage battery 10 cannot be constrained, and when the power supply plan indicated by the power supply / demand forecast information changes more than a predetermined standard, It has a function of notifying an alarm to a predetermined device such as the user terminal 300 or the power bidding system 350 operated by a person in charge of an electric power company. This alarm may include a request for implementing measures for suppressing or increasing the amount of power generation, an instruction for suppressing or increasing the amount of bids in the power bidding market, and the like.

Further, the charge / discharge control system 100 holds, in the storage battery information database 128 of the storage device 101, each data of the discharge suppression occurrence timing and the discharge upper limit power value as the discharge suppression occurrence history for each storage battery 10 in the power network 1. To do. In this case, when the charge / discharge control system 100 generates the charge / discharge plan in at least one of the primary process, the secondary process, and the future process described above, the charge / discharge timing information determined for each storage battery 10 is displayed. The discharge upper limit electric power value of the relevant storage battery 10 indicated by the corresponding occurrence history with respect to the storage battery 10 whose discharge suppression occurrence history has been found at the relevant charge / discharge timing as compared with the occurrence history of the discharge suppression of the relevant storage battery 10 in the storage battery information database 128 And the planned discharge power value determined in the charge / discharge plan of the relevant storage battery 10, and if the planned discharge power value exceeds the maximum discharge power value, the difference between the planned discharge power value and the maximum discharge power value is The charge rate information of each storage battery 10 in the storage battery information database 128 indicates the other storage battery that can calculate one or a plurality of discharges of the electric energy corresponding to the difference. A function that is specified based on the remaining discharge capacity and adds discharge corresponding to all or part of the above-described difference (the difference is apportioned between the other storage batteries) to the discharge plan of the specified one or more other storage batteries. Have
--- Data structure example ---

  Next, an example of the structure of data used by the charge / discharge control system 100 of this embodiment will be described. FIG. 4 is a diagram showing a data configuration example of the climate prediction database 125 in the present embodiment. The climate prediction database 125 is a database in which the charge / discharge control system 100 stores information obtained from the weather data providing server 200, and stores climate prediction data within at least a predetermined time relating to the location area of the power grid 1. The climate prediction database 125 is a collection of records in which information such as weather, temperature, humidity, wind direction, sunshine duration, and solar altitude are associated with each other for each prediction target day, using the time zone targeted for prediction as a key. Yes. The climate prediction database 125 is constantly updated to the latest data based on data provided from the weather data providing server 200 every hour, for example.

  FIG. 5 is a diagram showing a data configuration example of the power generation information database 126 in the present embodiment. The power generation information database 126 of the present embodiment stores the power generation plan obtained by determining the power generation amount for each time zone and the actual power generation amount for the most recent predetermined period, acquired from the power generation device (power plant) of each electric power company. It is a stored database. The power generation information database 126 stores, for example, the type of the power generation device, the generation date and time of the power generation plan, the power generation plan, the acquisition date and time of the latest power generation amount data, and the power generation amount data using the device ID that uniquely identifies the power generation device as a key. It is an aggregate of records in which data such as the power generation status is associated. Such information stored in the power generation information database 126 is assumed to be included in, for example, power generation information 25 obtained from the thermal power generation apparatus 2 and power generation information 35 obtained from the solar power generation apparatus 3.

  FIG. 6 is a diagram showing a data configuration example of the load information database 127 in the present embodiment. The load information database 127 according to the present embodiment is a database that stores data of power consumption (power demand) acquired for the load 4 from the distribution board 41 of each customer facility 6. This load information database 127 uses a load ID that uniquely identifies each load 4 as a key, and is a set of records in which data such as the acquisition date and time of the latest power consumption and the demand situation storing the power consumption data are associated. It is a body. It is assumed that such information stored in the load information database 127 is included in the load information 45 obtained from the load 4 of each customer facility 6.

  FIG. 7 is a diagram illustrating a data configuration example of the storage battery information database 128 in the present embodiment. The storage battery information database 128 of the present embodiment stores the charge rate information 15 acquired from each storage battery 10 and each data of discharge suppression occurrence timing and discharge upper limit power value, which is a discharge suppression occurrence history in each storage battery 10. It is. Specifically, the storage battery ID that uniquely identifies the storage battery 10 is used as a key, and data such as the storage capacity of the storage battery 10, the latest charging rate acquisition date and time, the charging rate, the discharge suppression occurrence date and time, and the discharge upper limit power value are supported. It is a collection of attached records.

  FIG. 8 is a diagram illustrating a data configuration example of the supply and demand prediction information database 129 in the present embodiment. The supply and demand prediction information database 129 of the present embodiment is such that the charge / discharge control system 100 generates the power generation plan and actual power generation amount of each power generation device 2, 3, etc. in the power grid 1, the actual power generation amount, climate prediction information, It is a database that stores information on power supply and demand prediction performed based on various information such as power consumption. This supply and demand prediction information database 129 is an aggregate of records in which supply and demand prediction is associated with the date and time when the supply and demand prediction is executed and the prediction target period. Various information used for supply and demand prediction including information on power demand prediction of the load 4 can be extracted from the supply and demand prediction information.

FIG. 9 is a diagram showing a data configuration example of the charge / discharge plan database 130 in the present embodiment. The charge / discharge plan database 130 is a database that stores a charge / discharge plan generated by the charge / discharge control system 100 and related to each storage battery 10 of the power grid 1. The charge / discharge plan database 130 of this embodiment uses the storage battery ID that uniquely identifies the storage battery 10 as a key, the date and time when the latest charge / discharge plan was created, the target period of the latest charge / discharge plan, and each data of the charge / discharge plan. It is a collection of records that correspond to each other.
--- Example of processing procedure 1 ---

  Hereinafter, the actual procedure of the charge / discharge control method in the present embodiment will be described with reference to the drawings. Each process of the charge / discharge control method described below is realized by a program 102 that is read and executed by the charge / discharge control system 100 in a memory or the like. And this program 102 is comprised from the code | cord | chord for performing the various operation | movement demonstrated below.

  FIG. 10 is a flowchart showing a processing procedure example 1 of the charge / discharge control method in the present embodiment, and FIG. 11 is an explanatory diagram showing a time concept in the charge / discharge control method of the present embodiment. Here, it is assumed that the charge / discharge control system 100 generates a charge / discharge plan for 24 hours corresponding to a certain day starting from now. In this case, as illustrated in FIG. 11, at the current time (first time) at 11:30 pm, the power generators 2, 3 have the latest data acquisition period (2 hours from 9:30 pm to the current time). The power generation amount (actual value) and power generation plan in the relevant period, the power consumption amount (actual value) in the relevant period from each customer facility 6 having the load 4, and the location area of the relevant electric power grid 1 from the weather data providing server 200 Information on the current charging rate is obtained from each storage battery 10 and stored in a corresponding database in the storage device 101 (s100).

  Next, based on the various information obtained in step s100, the charge / discharge control system 100 executes power supply and demand prediction for 24 hours (first period) starting from midnight, 30 minutes after the current time, using a predetermined algorithm. Then, the power supply / demand prediction data for 24 hours (first period) from midnight the next day obtained at 11:30 pm (first time) is generated and stored in the supply / demand prediction information database 129. (S101). In addition, the above-mentioned algorithm includes the power generation results and power generation plans of the power generation devices included in the power grid 1, the specifications and the power generation results of the power generation devices based on renewable energy, the results of power consumption at each load 4, and the climate prediction information An existing algorithm that identifies the correlation between various information related to power supply and demand and information on the actual power supply and demand situation in the past and applies this correlation to the conditions of the first period, which is the forecast period, to estimate the supply and demand relationship Adopt it.

  Subsequently, the charge / discharge control system 100 reads the power supply / demand prediction information at 11:30 pm (first time point) from the supply / demand prediction information database 129 of the storage device 101, and the above-described 24 hours ( A charging / discharging plan for each storage battery 10 that minimizes fluctuations in the supply and demand relationship in the first period) is generated by a predetermined algorithm under the constraints of the capacity range of each storage battery 10 (s102). As this algorithm, for example, an algorithm corresponding to a so-called mathematical programming method that determines the charge / discharge contents of each storage battery 10 that minimizes the fluctuation of the supply and demand relationship as an objective function under the restriction of the capacity range described above can be adopted.

  In addition, when the charge / discharge control system 100 performs charge / discharge control to minimize the fluctuation of the power supply / demand relationship in the power network 1 with respect to the charge / discharge plan generation in step s102 described above, the capacity range restriction (charge) of each storage battery 10 is charged. It is determined whether charging / discharging within the upper and lower capacities of the capacity can be observed (s103). In this determination, the charge / discharge control system 100 performs the power supply / demand forecast information (execution of power supply / demand prediction before step s101) according to the generation of the charge / discharge plan performed at this time, that is, at 11:30 pm as described above. OR whether or not the power supply plan indicated by (sometimes obtained) needs to be changed more than a predetermined standard (eg, change the amount of power generation in a certain power generation device by 10% or more, etc.) It may be determined as a condition.

  As a result of such determination, when it is found that the above-mentioned capacity range restriction cannot be observed (s103: n), the charge / discharge control system 100 can be operated by the user terminal 300 or the power bidding system 350 operated by the person in charge of the electric power company. The predetermined device is notified of an alarm (s104) and waits until the next charge / discharge plan generation start timing (second time point) (s105). In this alarm, power generation in the power grid 1 is performed so that the corresponding storage battery 10 can be used as a charge / discharge control target in the next processing, that is, the above-described capacity range restriction can be easily observed when the charge / discharge plan is generated. It is preferable to include a request for implementing measures to reduce or increase the amount, and instructions for suppressing or increasing the amount of bids in the power bidding market.

  On the other hand, if it is found as a result of the above-described determination that the capacity range restriction can be observed (s103: y), the charge / discharge control system 100 stores the charge / discharge plan for the first period generated in the above-described step s102 in the storage device. It stores in the charge / discharge plan database 130 of 101 (s106).

  Further, the charge / discharge control system 100 notifies each corresponding storage battery 10 of a charge / discharge instruction via the network 5 based on the charge / discharge plan of each storage battery 10 related to the first period (s107).

  After that, for example, it has reached 5:30 am (second time point) when a predetermined time interval such as 6 hours has passed, or 3:30 am (event detection time) before the second time point arrives. When the occurrence of a predetermined event is detected (s108: y), the charging / discharging control system 100 determines whether the data acquisition period from each of the power generators 2 and 3 at the second time point or the event detection time point, for example, for the data acquisition period of the last two hours. Power generation amount (actual value) and power generation plan in each period from each customer facility 6 having the load 4 to the power consumption amount (actual value) in the relevant period, from the weather data providing server 200 to the climate related to the area where the electric power grid 1 is located Predictive information is obtained from each storage battery 10 at the current charging rate, and stored in the corresponding database in the storage device 101 (s109). The details of the above-described detection of event occurrence will be described later using another flow.

  Subsequently, the charge / discharge control system 100 performs 18 hours (second period) from 6 am to 12 pm, 30 minutes after the second time point, based on various information obtained in step s109 described above, or event detection. Power supply and demand forecast for 20 hours (second period) from 4:00 am to 12:00 pm 30 minutes after the time point is executed by a predetermined algorithm, 5:30 am (second time point) or 3:00 am Electric power supply / demand prediction data obtained from 30 am (at the time of event detection) from 6:00 am to 12:00 pm (second period) is generated and stored in the supply / demand prediction information database 129 (s110).

  Subsequently, the charge / discharge control system 100 reads the power supply / demand prediction information regarding the second period obtained in step s110 from the supply / demand prediction information database 129 of the storage device 101, and the power supply / demand prediction information indicates 18 hours or 20 hours ( In both cases, a charge / discharge plan for each storage battery 10 that minimizes fluctuations in the supply and demand relationship in the second period) is generated in the same manner as in step s102 described above by a predetermined algorithm under the restriction of the capacity range of each storage battery 10 (s111). .

  In addition, when the charge / discharge control system 100 performs charge / discharge control to minimize fluctuations in the power supply / demand relationship in the power network 1 with respect to the charge / discharge plan generation in step s111 described above, the capacity range restriction (charge) of each storage battery 10 is charged. It is determined whether charging / discharging within the upper and lower limits of the capacity can be observed (s112). In this determination, the charge / discharge control system 100 determines the power supply / demand forecast information (first time) according to the generation of the charge / discharge plan performed at this time, that is, at the time of 5:30 am or 3:30 am. It may be determined as an OR condition as to whether or not a change beyond a predetermined standard is necessary in the power supply plan indicated by (what is obtained at the time).

  If it is determined as a result of such determination that the above-mentioned capacity range restriction cannot be observed (s112: n), the charge / discharge control system 100 can be operated by a user terminal 300 or a power bidding system 350 operated by a person in charge of an electric power company. The predetermined device is notified of an alarm (s113) and waits until the next charge / discharge plan generation start timing (third time point) (s114).

  On the other hand, as a result of the above determination, when it is found that the capacity range restriction can be observed (s112: y), the charge / discharge control system 100 stores the charge / discharge plan for the second period generated in step s111 described above in the storage device. It stores in the charge / discharge plan database 130 of 101 (s115).

  In addition, the charge / discharge control system 100 notifies each corresponding storage battery 10 of a new charge / discharge instruction via the network 5 based on the charge / discharge plan of each storage battery 10 related to the second period (s116). .

Thereafter, the charge / discharge control system 100 repeatedly executes the same processing as the above-described steps s108 to s116 for the future after the second time point (s117), for example, at a predetermined time of the day (eg, 10:00 pm). In response to the arrival or an instruction from the user terminal 300 (s118: y), the process of generating the charge / discharge plan for the relevant day is terminated.
--- Processing procedure example 2 ---

  Next, the process for detecting the occurrence of a predetermined event described with respect to step s108 in the above flow will be described with reference to the drawings. FIG. 12 is a flowchart showing a processing procedure example 2 of the charge / discharge control method according to the present embodiment. The process described here is assumed to be executed at the second time point as an example, but can also be applied to a process similar to step s108 performed at another time point.

  In this case, the charge / discharge control system 100 acquires the charging rate information 15 from each storage battery 10 in the above-described power network 1 at the most recent predetermined time until the above-mentioned second time point comes (s200), and the charging rate of each storage battery 10 As a result of monitoring the state of charge of each storage battery 10 based on the information, it is determined whether the deviation of the state of charge between the rechargeable batteries of the power grid 1 exceeds a predetermined reference for a predetermined time (s201). The bias of the state of charge between the storage batteries exceeds a predetermined standard is, for example, a state in which the charging rate exceeds the upper limit standard of 75% or the lower limit standard in all or 70% or more of the plurality of storage batteries 10 connected to the power grid 1 It refers to the state below 20%. For example, if such a state has continued for two hours or more, it is estimated that this “biased” state tends to advance further, and the charge / discharge control system 100 promptly regenerates the charge / discharge plan. Is determined to be necessary.

  As a result of the above determination, when it is found that the deviation of the charging state between the rechargeable batteries of the power grid 1 exceeds the predetermined reference for a predetermined time (s201: y), the charging / discharging control system 100 performs the processing in the steps of the above flow. Proceeding to s109, the flow ends. On the other hand, as a result of the above determination, when it is found that there is no fact that the bias of the charging state between the rechargeable batteries of the power grid 1 exceeds the predetermined reference for a predetermined time (s201: n), the charge / discharge control system 100 performs the processing. Proceed to step s202.

  Further, the charge / discharge control system 100 acquires the latest power supply / demand prediction information at the second time point from the supply / demand prediction information database 129, and at the predetermined time until the second time point arrives, Power consumption (actual value) is acquired from the customer facility 6 of each load 4 in 1 (s202), and the power demand forecast indicated by the power demand and supply forecast information obtained here and the actual power demand in the power grid 1 It is determined whether the deviation exceeds a predetermined standard (s203).

  As a result of the above determination, when it is determined that the difference between the power demand prediction and the power demand amount exceeds a predetermined standard (s203: y), the charge / discharge control system 100 advances the process to step s109 of the above flow. The flow is finished. On the other hand, as a result of the above determination, when it is found that the difference between the power demand prediction and the power demand amount does not exceed the predetermined standard (s203: n), the charge / discharge control system 100 advances the process to step s204.

  In addition, the charge / discharge control system 100 acquires information on the actual power generation amount from the solar power generation device 3 in the power network 1 at the most recent predetermined time until the second time point comes (s204). Further, the charge / discharge control system 100 predicts a renewable energy power generation amount indicated by the actual power generation amount of the solar power generation device 3 and the latest power supply / demand prediction information at the second time point obtained in step s202 described above ( In the present embodiment, the power generation amount prediction information in the solar power generation device 3 is compared, and it is determined whether the deviation exceeds a predetermined standard (s205).

  As a result of the above determination, when it is found that the difference between the power generation amount (actual result) of the solar power generation device 3 and the power generation amount prediction exceeds a predetermined standard (s205: y), the charge / discharge control system 100 performs the process. Proceeding to step s109 of the above flow, the flow is terminated. On the other hand, as a result of the above-described determination, when it is determined that the difference between the power generation amount (actual result) of the solar power generation device 3 and the power generation amount prediction does not exceed the predetermined standard (s205: n), the charge / discharge control system 100 is Then, the process proceeds to step s206.

  In addition, the charge / discharge control system 100 acquires information on the actual power consumption (the actual amount of power demand) from the customer facility 6 of each load 4 in the power network 1 in the most recent predetermined time until the second time point comes (s206). ). In addition, the charge / discharge control system 100 determines at least one of the actual power consumption in the power network 1 obtained in step s206 and the actual power generation amount of the solar power generation device 3 obtained in step s204 described above. It is determined whether the amount of change exceeds a predetermined standard (s207).

  As a result of the above determination, when the amount of change per hour in at least one of the power consumption amount in the power grid 1 and the actual power generation amount of the solar power generation device 3 exceeds a predetermined reference (s207: y), charge / discharge control The system 100 proceeds with the process to step s109 of the above flow, and ends the flow. On the other hand, as a result of the above determination, when the amount of change per hour in the power consumption amount in the power network 1 and the actual power generation amount of the solar power generation device 3 does not exceed the predetermined reference (s207: n), The charge / discharge control system 100 returns the process to step s108 in the above flow, and ends the flow.

The process for detecting the occurrence of the predetermined event in step s108 in the above flow has been described above.
--- Processing procedure example 3 ---

  Next, processing for generating a charge / discharge plan based on the occurrence history of discharge suppression of each storage battery 10 will be described with reference to the drawings. Here, first, it will be described that there is a case where the storage battery 10 cannot be discharged according to the charge / discharge plan depending on the charging rate of the storage battery 10 and the environment in which the storage battery 10 is placed. FIG. 13 is an explanatory diagram showing a concept of discharging the storage battery 10 in the grid connection in the present embodiment.

  As illustrated in FIG. 13, the system 60 through which high-voltage power such as 6000 V flows is electrically connected to the load 4 of the low-voltage line 70 and the storage battery 10 via an appropriate transformer 65 such as a pole transformer. The voltage in the low-voltage line 70 must fall within the range of 101 ± 6V and 202 ± 20V. Therefore, when discharging from the storage battery 10 to the low voltage line 70, depending on the voltage and impedance of the system 60, if the discharge from the storage battery 10 exceeds the upper limit (107V, 222V) of the voltage, the discharge must be suppressed. I must. That is, the electric power that can be discharged from the storage battery 10 is limited depending on the situation. Therefore, when generating a charge / discharge plan for each storage battery 10, it is necessary to take into account such a discharge suppression event in the storage battery 10.

  FIG. 14 is a flowchart showing an example 3 of the processing procedure of the charge / discharge control method according to this embodiment. The charge / discharge control system 100 that generates the charge / discharge plan based on such a situation is related to each storage battery 10 when generating the charge / discharge plan in at least one of the primary process, the secondary process, and the future process described above. The information on the charging / discharging time determined as the charging / discharging plan (eg, day of the week and time zone) is compared with the occurrence history of the discharge suppression of the relevant storage battery 10 in the storage battery information database 128, and the same day of the week and time zone as the relevant charging / discharging time. Is determined whether there is a storage battery 10 in which the occurrence history of discharge suppression is registered (s300).

  As a result of the above determination, when the presence of the storage battery 10 in which the occurrence history of discharge suppression is registered is found for the same day of the week and time zone as the corresponding charge / discharge timing (s301: y), the charge / discharge control system 100 is The discharge upper limit power value of the corresponding storage battery 10 indicated by the occurrence history is compared with the planned discharge power value determined in the charge / discharge plan of the corresponding storage battery 10 to determine whether the planned discharge power value exceeds the discharge upper limit power value ( s302).

  As a result of the above determination, when it is determined that the planned discharge power value exceeds the maximum discharge power value (s303: y), the charge / discharge control system 100 determines the difference between the planned discharge power value and the maximum discharge power value. Is calculated (s304).

  Next, in the charge / discharge control system 100, the charge rate information of each storage battery 10 in the storage battery information database 128 indicates one or more other storage batteries capable of discharging one or more electric powers corresponding to the difference calculated in step s304. It is specified based on the discharge capacity (s305).

  In addition, the charge / discharge control system 100 acquires the discharge plan of one or more other storage batteries specified in step s305 described above from the charge / discharge plan database 130, and all or part of the above difference (difference) Is added to the other storage batteries), the corresponding discharge plan is updated (s306), and the process is terminated. The process for generating the charge / discharge plan for each storage battery 10 has been described above based on the phenomenon of suppression of discharge in each storage battery 10.

  Although the best mode for carrying out the present invention has been specifically described above, the present invention is not limited to this, and various modifications can be made without departing from the scope of the invention.

  According to the present embodiment, accurate charge / discharge control in the grid-connected power storage device can be continuously performed according to the changing power supply / demand situation.

DESCRIPTION OF SYMBOLS 1 Electric power network 2 Thermal power generation apparatus 3 Solar power generation apparatus 4 Load 5 Network 6 Consumer facility 10 Storage battery 15 Charging rate information 25 and 35 Power generation information 41 Distribution board 42 Electricity meter 45 Load information 60 System 65 Transformer 70 Low voltage line 100 Charge / Discharge Control System 101 Storage Device 102 Program 103 Memory 104 Computing Device 105 Input Device 106 Output Device 107 Communication Device 125 Climate Prediction Database 126 Power Generation Information Database 127 Load Information Database 128 Storage Battery Information Database 129 Supply / Demand Forecast Information Database 130 Charge / Discharge Plan Database 200 Weather data providing server 225 Weather information 300 User terminal 350 Power bidding system

Claims (12)

A plurality of power generators, storage batteries, and in terms of power network including a load, a power supply and demand prediction information of a predetermined first time period predicted in a predetermined first time point, and the charging rate information of the storage battery in the first time, in the power network For each storage battery, as storage history of discharge suppression, each data of discharge suppression occurrence timing and discharge upper limit power value, a storage device that stores,
The charging / discharging plan of the storage battery in the power network that minimizes the fluctuation of the supply and demand relation indicated by the power supply and demand prediction information at the first time point is generated by a predetermined algorithm under the limitation of the capacity range of the storage battery, and the generated A primary process of storing a charge / discharge plan for the first period in a storage device and notifying the storage battery of a charge / discharge instruction based on the charge / discharge plan for the first period;
Based on predetermined information obtained with respect to the power network at a second time point after a predetermined time has elapsed from the first time point, a power supply / demand forecast for a predetermined second period, and acquisition of storage battery charge rate information at the second time point, Is executed by a predetermined algorithm, and fluctuations in the supply and demand relation indicated by the power supply and demand prediction information at the second time point are based on the power supply and demand prediction for the second period obtained at the second time point and the charging rate information of the storage battery. The charging / discharging plan of the storage battery in the electric power network to be minimized is generated by a predetermined algorithm under the limitation of the capacity range of the storage battery, the generated charging / discharging plan for the second period is stored in a storage device, and A secondary process for notifying the storage battery of a charge / discharge instruction based on a charge / discharge plan for two periods;
At the time of generating the charge / discharge plan of at least one of the primary process, the secondary process, and a future process related to a predetermined future period at a future time point in the future from the second time point, it is determined for each storage battery. Comparing the information on the charging / discharging timing with the occurrence history of the discharge suppression, regarding the storage battery whose discharge suppression occurrence history is found at the corresponding charging / discharging timing, the discharge upper limit power value of the corresponding storage battery indicated by the occurrence history and the corresponding storage battery When the planned discharge power value exceeds the discharge upper limit power value, the difference between the planned discharge power value and the discharge upper limit power value is calculated, and the difference is calculated. The other storage battery capable of discharging one or a plurality of electric energy corresponding to the above is specified based on the discharge capacity indicated by the charge rate information, and the discharge plan of the specified one or more other storage batteries is specified. A process of plus a discharge corresponding to all or part of the serial differential,
An arithmetic unit for executing
A charge / discharge control system comprising: The arithmetic unit is:
Each process in the secondary process is sequentially repeated based on the occurrence of a predetermined event as a future next process related to a predetermined future period at a future time point in the future from the second time point.
The charge / discharge control system according to claim 1. The arithmetic unit is:
As a result of monitoring the charging state of each storage battery in the power network, when detecting that the bias of the charging state between the rechargeable batteries exceeds a predetermined reference for a predetermined time; and
When it is detected that the deviation between the power demand forecast indicated by the power demand / supply forecast information and the actual power demand in the power network exceeds a predetermined standard,
When it is detected that the deviation between the renewable energy power generation amount prediction indicated by the power supply and demand prediction information and the actual renewable energy power generation amount in the power network exceeds a predetermined standard;
When it is detected that the amount of change per hour of actual power demand or renewable energy power generation amount in the power network exceeds a predetermined standard;
When at least one of the situations, the secondary processing and at least one of the subsequent processing at the future time point is executed.
The charge / discharge control system according to claim 1 or 2. The arithmetic unit is:
It has been found that the capacity range limitation of the storage battery cannot be observed when charge / discharge control is performed to minimize fluctuations in the supply and demand relationship during at least one of the primary process, the secondary process, and the future process. And if
When a change beyond a predetermined standard occurs in the power supply plan indicated by the power supply and demand prediction information,
When the situation becomes at least one of the following, a process for notifying an alarm to a predetermined device is further executed.
The charge / discharge control system according to any one of claims 1 to 3. A plurality of power generators, storage batteries, and in terms of power network including a load, a power supply and demand prediction information of a predetermined first time period predicted in a predetermined first time point, and the charging rate information of the storage battery in the first time, in the power network For each storage battery, an information processing system including a storage device that stores discharge suppression occurrence timing and discharge upper limit power value data as the occurrence history of discharge suppression ,
The charging / discharging plan of the storage battery in the power network that minimizes the fluctuation of the supply and demand relation indicated by the power supply and demand prediction information at the first time point is generated by a predetermined algorithm under the limitation of the capacity range of the storage battery, and the generated A primary process of storing a charge / discharge plan for the first period in a storage device and notifying the storage battery of a charge / discharge instruction based on the charge / discharge plan for the first period;
Based on predetermined information obtained with respect to the power network at a second time point after a predetermined time has elapsed from the first time point, a power supply / demand forecast for a predetermined second period, and acquisition of storage battery charge rate information at the second time point, Is executed by a predetermined algorithm, and fluctuations in the supply and demand relation indicated by the power supply and demand prediction information at the second time point are based on the power supply and demand prediction for the second period obtained at the second time point and the charging rate information of the storage battery. The charging / discharging plan of the storage battery in the electric power network to be minimized is generated by a predetermined algorithm under the limitation of the capacity range of the storage battery, the generated charging / discharging plan for the second period is stored in a storage device, and A secondary process for notifying the storage battery of a charge / discharge instruction based on a charge / discharge plan for two periods;
At the time of generating the charge / discharge plan of at least one of the primary process, the secondary process, and a future process related to a predetermined future period at a future time point in the future from the second time point, it is determined for each storage battery. Comparing the information on the charging / discharging timing with the occurrence history of the discharge suppression, regarding the storage battery whose discharge suppression occurrence history is found at the corresponding charging / discharging timing, the discharge upper limit power value of the corresponding storage battery indicated by the occurrence history and the corresponding storage battery When the planned discharge power value exceeds the discharge upper limit power value, the difference between the planned discharge power value and the discharge upper limit power value is calculated, and the difference is calculated. The other storage battery capable of discharging one or a plurality of electric energy corresponding to the above is specified based on the discharge capacity indicated by the charge rate information, and the discharge plan of the specified one or more other storage batteries is specified. A process of plus a discharge corresponding to all or part of the serial differential,
The charge / discharge control method characterized by performing. The information processing system is
Each process in the secondary process is sequentially repeated based on the occurrence of a predetermined event as a future next process related to a predetermined future period at a future time point in the future from the second time point.
The charge / discharge control method according to claim 5 . The information processing system is
As a result of monitoring the charging state of each storage battery in the power network, when detecting that the bias of the charging state between the rechargeable batteries exceeds a predetermined reference for a predetermined time; and
When it is detected that the deviation between the power demand forecast indicated by the power demand / supply forecast information and the actual power demand in the power network exceeds a predetermined standard,
When it is detected that the deviation between the renewable energy power generation amount prediction indicated by the power supply and demand prediction information and the actual renewable energy power generation amount in the power network exceeds a predetermined standard;
When it is detected that the amount of change per hour of actual power demand or renewable energy power generation amount in the power network exceeds a predetermined standard;
At least one of the secondary processing and each processing at a future time point thereafter is executed when at least one of the following situations occurs:
The charge / discharge control method according to claim 5 or 6 , wherein: The information processing system is
It has been found that the capacity range limitation of the storage battery cannot be observed when charge / discharge control is performed to minimize fluctuations in the supply and demand relationship during at least one of the primary process, the secondary process, and the future process. And if
When a change beyond a predetermined standard occurs in the power supply plan indicated by the power supply and demand prediction information,
When at least one of the following situations occurs, a process of notifying an alarm to a predetermined device is further executed.
Charge and discharge control method according to any one of claims 5-7, characterized in that. A plurality of power generators, storage batteries, and in terms of power network including a load, a power supply and demand prediction information of a predetermined first time period predicted in a predetermined first time point, and the charging rate information of the storage battery in the first time, in the power network For each storage battery, an information processing system including a storage device that stores discharge suppression occurrence timing and discharge upper limit power value data as the occurrence history of discharge suppression ,
The charging / discharging plan of the storage battery in the power network that minimizes the fluctuation of the supply and demand relation indicated by the power supply and demand prediction information at the first time point is generated by a predetermined algorithm under the limitation of the capacity range of the storage battery, and the generated A primary process of storing a charge / discharge plan for the first period in a storage device and notifying the storage battery of a charge / discharge instruction based on the charge / discharge plan for the first period;
Based on predetermined information obtained with respect to the power network at a second time point after a predetermined time has elapsed from the first time point, a power supply / demand forecast for a predetermined second period, and acquisition of storage battery charge rate information at the second time point, Is executed by a predetermined algorithm, and fluctuations in the supply and demand relation indicated by the power supply and demand prediction information at the second time point are based on the power supply and demand prediction for the second period obtained at the second time point and the charging rate information of the storage battery. The charging / discharging plan of the storage battery in the electric power network to be minimized is generated by a predetermined algorithm under the limitation of the capacity range of the storage battery, the generated charging / discharging plan for the second period is stored in a storage device, and A secondary process for notifying the storage battery of a charge / discharge instruction based on a charge / discharge plan for two periods;
At the time of generating the charge / discharge plan of at least one of the primary process, the secondary process, and a future process related to a predetermined future period at a future time point in the future from the second time point, it is determined for each storage battery. Comparing the information on the charging / discharging timing with the occurrence history of the discharge suppression, regarding the storage battery whose discharge suppression occurrence history is found at the corresponding charging / discharging timing, the discharge upper limit power value of the corresponding storage battery indicated by the occurrence history and the corresponding storage battery When the planned discharge power value exceeds the discharge upper limit power value, the difference between the planned discharge power value and the discharge upper limit power value is calculated, and the difference is calculated. The other storage battery capable of discharging one or a plurality of electric energy corresponding to the above is specified based on the discharge capacity indicated by the charge rate information, and the discharge plan of the specified one or more other storage batteries is specified. A process of plus a discharge corresponding to all or part of the serial differential,
The charge / discharge control program characterized by performing this. In the information processing system,
Each process in the secondary process is sequentially repeated based on the occurrence of a predetermined event as a future next process related to a predetermined future period at a future time point in the future from the second time point.
The charge / discharge control program according to claim 9 . In the information processing system,
As a result of monitoring the charging state of each storage battery in the power network, when detecting that the bias of the charging state between the rechargeable batteries exceeds a predetermined reference for a predetermined time; and
When it is detected that the deviation between the power demand forecast indicated by the power demand / supply forecast information and the actual power demand in the power network exceeds a predetermined standard,
When it is detected that the deviation between the renewable energy power generation amount prediction indicated by the power supply and demand prediction information and the actual renewable energy power generation amount in the power network exceeds a predetermined standard;
When it is detected that the amount of change per hour of actual power demand or renewable energy power generation amount in the power network exceeds a predetermined standard;
At least one of the secondary processing and the subsequent processing at a future time point is executed when at least one of the following situations occurs:
The charge / discharge control program according to claim 9 or 10 , characterized in that In the information processing system,
It has been found that the capacity range limitation of the storage battery cannot be observed when charge / discharge control is performed to minimize fluctuations in the supply and demand relationship during at least one of the primary process, the secondary process, and the future process. And if
When a change beyond a predetermined standard occurs in the power supply plan indicated by the power supply and demand prediction information,
When at least one of the following situations occurs, a process of notifying an alarm to a predetermined device is further executed.
The charge / discharge control program according to any one of claims 9 to 11 .

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