JP2021040392A - Control device, charging/discharging system, and charging/discharging control program - Google Patents

Abstract

To provide a control device in which linkage point power can be increased while a linkage condition is satisfied.SOLUTION: A control device 1 temporarily stores power generated by wind power generation devices 3-1, 3-2, and controls charging/discharging of power storage batteries 21-1 to 21-n that reversely supply the stored power to a power system. The control device includes a power storage battery information acquisition unit 11 that acquires power storage battery information including the stored power amounts of the power storage batteries, a wind power generation information acquisition unit 12 that acquires wind power generation information including a wind power generation output, a target value calculation unit 14 that calculates a target value of power to be reversely supplied to the power system, on the basis of an estimated output range of the wind power generation output on the basis of the wind power generation information, the power storage battery information, and a power system linkage condition, and a charging/discharging instruction unit 15 that calculates a charging/discharging instruction value to the power storage batteries on the basis of the target value.SELECTED DRAWING: Figure 2

Description

The present invention relates to a control device, a charge / discharge system, and a charge / discharge control program for wind power generation.

In a system in which the power generated by using a wind power generator is reverse-powered to the power system of the power company and sold to the power company, the fluctuation of the interconnection point power, which is the power to be reverse-powered to the power system, is within a predetermined range. The internal interconnection condition may be imposed. Therefore, in a wind power generation system, a storage battery system is often used in order to suppress fluctuations in interconnection point power. For example, in Patent Document 1, the interconnection point is determined by determining the range of the interconnection point power in the second period from the present to the future based on the wind power generation output in the first period from the past to the present. A system that suppresses fluctuations in electric power is disclosed. In this system, when the wind power generation output in the second period deviates from the determined range, the deviated amount of electric power is charged to the storage battery system.

JP-A-2009-0759559

However, according to the above-mentioned conventional technique, when the wind power generation output increases, the interconnection point power increases so as to be within a predetermined range from the point of increase. For this reason, there is a problem that the interconnection point power is suppressed and the amount of power sold to the electric power company is reduced.

The present invention has been made in view of the above, and an object of the present invention is to obtain a control device capable of increasing the interconnection point power while satisfying the interconnection condition.

In order to solve the above-mentioned problems and achieve the object, the control device according to the present invention can temporarily store the power generated by the wind power generation device and reverse the stored power to the power system. A storage battery information acquisition unit that controls the charging and discharging of various storage batteries and acquires storage battery information including the amount of electricity stored in the storage battery, a wind power generation information acquisition unit that acquires wind power generation information including wind power generation output, and wind power based on wind power generation information. A target value calculation unit that calculates the target value of power to be reverse power flowed to the power system based on the expected output range of the power generation output, storage battery information, and the interconnection condition of the power system, and charging / discharging to the storage battery based on the target value. It is characterized by including a charge / discharge command unit for calculating a command value.

According to the present invention, it is possible to increase the interconnection point power while satisfying the interconnection condition.

The figure which shows the structure of the charge / discharge system which concerns on Embodiment 1 of this invention. The figure which shows the functional structure of the control device shown in FIG. A flowchart for explaining the operation of the control device shown in FIG. A flowchart showing an example of detailed operation of the target value calculation unit shown in FIG. The figure which shows an example of the data for creating the look-up table used by the target value calculation part shown in FIG. The figure which shows an example of the target value of the interconnection point power calculated by the target value calculation part shown in FIG. The figure which shows an example of the wind power generation output of each wind power generation apparatus shown in FIG. The figure which shows the total wind power generation output of the plurality of wind power generation devices shown in FIG. The figure which shows the comparative example of the target value of the interconnection point power set in the case of the wind power generation output shown in FIG. The figure which shows an example of the target value of the interconnection point power set by the control device shown in FIG. 2 in the case of the wind power generation output shown in FIG. The figure which shows an example of the hardware configuration for realizing the function of the control device shown in FIG.

Hereinafter, the control device, the charge / discharge system, and the charge / discharge control program according to the embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

Embodiment 1.
FIG. 1 is a diagram showing a configuration of a charge / discharge system 10 according to a first embodiment of the present invention. The charge / discharge system 10 includes a control device 1, a storage battery system 2, and a wind power generation device 3-1 and 3-2. In the following description, when it is not necessary to distinguish each of the wind power generation devices 3-1 and 3-2, it is simply referred to as the wind power generation device 3. Although two wind power generation devices 3 are shown here for simplicity, the number of wind power generation devices 3 may be one or three or more.

The control device 1 controls the charging / discharging of the storage battery system 2. The storage battery system 2 can temporarily store the electric power generated by the wind power generation device 3 and reverse the stored electric power to the electric power system 4. The storage battery system 2 is used to adjust the amount of power generated by the wind power generation device 3 to be reverse-flowed to the power system 4. The wind power generator 3 uses wind power to generate electricity. The electric power generated by the wind power generation device 3 can be reverse-flowed to the electric power system 4, or can be supplied to the storage battery system 2 when the storage battery system 2 is charging.

The control device 1 acquires storage battery information including the amount of electricity stored in the storage battery of the storage battery system 2 from the storage battery system 2. The control device 1 acquires wind power generation information including the wind power generation output of the wind power generation devices 3-1 and 3-2 from the wind power generation devices 3-1 and 3-2. Based on the acquired storage battery information and wind power generation information, the control device 1 calculates a target value of interconnection point power, which is power to be reverse-flowed to the power system 4, and generates a charge / discharge command based on the target value. , The generated charge / discharge command is given to the storage battery system 2. Therefore, the control device 1 can control the interconnection point power to be reverse-powered to the power system 4 by controlling the charging / discharging of the storage battery system 2.

As described above, the control device 1 calculates the target value of the interconnection point power and generates a charge / discharge command instructing the charge / discharge amount of the storage battery system 2 so that the interconnection point power approaches the target value. However, since the wind power generation output of the wind power generation device 3 changes with time, the interconnection point power does not always reach the target value when the target value is calculated based on the current wind power generation output. The value of the interconnection point power is subject to a condition called an interconnection regulation set by the electric power company that manages the power system 4. The interconnection regulation indicates the interconnection conditions such as the standard and the condition of the electric power value at the interconnection point between the wind power generation device 3 and the electric power system 4. The interconnection condition includes, for example, a condition that the rate of change of the value of the interconnection point power is within the standard. More specifically, the interconnection condition includes the condition that the amount of change per minute is within 1% of the interconnection rating. It is preferable that the control device 1 controls the charge / discharge of the storage battery system 2 so that the amount of power to be reverse-fed to the power system 4 is as large as possible while satisfying the interconnection condition.

FIG. 2 is a diagram showing a functional configuration of the control device 1 shown in FIG. The control device 1 includes a storage battery information acquisition unit 11, a wind power generation information acquisition unit 12, a reference information acquisition unit 13, a target value calculation unit 14, and a charge / discharge command unit 15.

The storage battery information acquisition unit 11 acquires storage battery information from the storage battery system 2. The storage battery system 2 has a storage battery 21-1 to 21-n and a PCS (Power Conditioning System) 22-1 to 22-n. Hereinafter, when it is not necessary to distinguish each of the storage batteries 21-1 to 21-n, it is simply referred to as the storage battery 21. Similarly, when it is not necessary to distinguish each of PCS22-1 to 22-n, it is simply referred to as PCS22. The PCS 22 is a power conversion device that converts DC power and AC power in both directions. The PCS 22 outputs a command value to the storage battery 21 based on a charge / discharge command from the control device 1. The storage battery information includes the storage amount of the storage batteries 21-1 to 21-n. The storage battery information acquisition unit 11 outputs the acquired storage battery information to the target value calculation unit 14.

The wind power generation information acquisition unit 12 acquires wind power generation information from the wind power generation device 3. The wind power generation information includes the value of the wind power generation output which is the power generated by the wind power generation device 3. Here, the value of the wind power generation output included in the wind power generation information is the total value of the wind power generation output of the plurality of wind power generation devices 3-1 and 3-2. The wind power generation information acquisition unit 12 outputs the acquired wind power generation information to the target value calculation unit 14.

The reference information acquisition unit 13 acquires reference information which is information used by the target value calculation unit 14 to calculate the target value of the interconnection point power. The reference information includes information used by the target value calculation unit 14 to calculate the expected output range of the wind power generation output, such as the value of the wind power generation output of the wind power generation device 3 acquired in the past, and the power system 4. Including the interconnection conditions of. The reference information acquisition unit 13 may acquire reference information from a storage area provided inside the control device 1, or may acquire reference information from another information processing device connected to the control device 1. The reference information acquisition unit 13 outputs the acquired reference information to the target value calculation unit 14.

The target value calculation unit 14 calculates the target value of the electric power to be reverse-flowed to the electric power system 4 based on the wind power generation information, the storage battery information, and the reference information. For example, the target value calculation unit 14 obtains an expected output range of the wind power generation output of the wind power generation device 3 based on the wind power generation information and the reference information. At this time, the target value calculation unit 14 can obtain the expected output range based on the wind power generation output accumulated in the past. The target value calculation unit 14 calculates the amount of electric power that can be reverse-fed to the electric power system 4 by adding the representative value within the expected output range and the storage battery information. Here, the representative value is, for example, the lower limit value of the expected output range. Then, the target value calculation unit 14 can calculate the target value of the electric power to be reverse-flowed to the electric power system 4 by adjusting the calculated electric energy amount based on the interconnection condition of the electric power system 4. The target value calculation unit 14 outputs the calculated target value to the charge / discharge command unit 15.

The charge / discharge command unit 15 generates a charge / discharge command for instructing the charge amount or the discharge amount of the storage battery system 2 based on the target value of the electric power to be reverse-flowed to the power system 4. The charge / discharge command unit 15 outputs the generated charge / discharge command to the storage battery system 2. As shown in FIG. 2, when the storage battery system 2 has a plurality of storage batteries 21, the charge / discharge command unit 15 distributes the charge amount or the discharge amount to each of the plurality of storage batteries 21 and gives a charge / discharge command to each storage battery 21. Can be generated. In this case, the charge / discharge command unit 15 outputs the generated charge / discharge command to each of the plurality of PCS 22s provided corresponding to the plurality of storage batteries 21.

FIG. 3 is a flowchart for explaining the operation of the control device 1 shown in FIG. The reference information acquisition unit 13 of the control device 1 acquires the reference information (step S101). The storage battery information acquisition unit 11 of the control device 1 acquires the storage battery information (step S102). The wind power generation information acquisition unit 12 acquires wind power generation information (step S103).

The target value calculation unit 14 calculates a representative value of the expected output range of the wind power generation output based on the reference information and the wind power generation information (step S104). The target value calculation unit 14 calculates the target value of the interconnection point power based on the calculated representative value, the storage battery information, and the reference information (step S105).

The charge / discharge command unit 15 generates a charge / discharge command based on the target value of the interconnection point power calculated in step S105 (step S106). Here, the control device 1 determines whether or not a predetermined time has elapsed since the last time the storage battery information was acquired (step S107). The predetermined time is an interval for calculating the target value of the interconnection point power, for example, 100 ms.

If the predetermined time has not elapsed (step S107: No), the process of step S107 is repeated. When the predetermined time has elapsed (step S107: Yes), the control device 1 returns to the process of step S102.

By performing the operation described above, the control device 1 calculates a target value of the interconnection point power at predetermined time intervals, and a charge / discharge command is generated according to the calculated target value. The generated charge / discharge command is output to the storage battery system 2, and the storage battery system 2 charges or discharges according to the charge / discharge command. Therefore, the control device 1 updates the command value of the charge amount or the discharge amount of the storage battery system 2 at predetermined time intervals, and as a result, the interconnection point power can be controlled.

FIG. 4 is a flowchart showing an example of a detailed operation of the target value calculation unit 14 shown in FIG. The operation shown in FIG. 4 corresponds to the details of steps S104 and S105 shown in FIG. The inventors of the present application have found that there is a correlation between the mean value of the wind power generation output in the last 10 minutes and the mean value of the wind power generation output for the next 3 hours. Therefore, in the present embodiment, the target value calculation unit 14 of the control device 1 obtains the expected output range of the wind power generation output for the next 3 hours based on the average value of the wind power generation output in the nearest 10 minutes.

The target value calculation unit 14 calculates the average value of the wind power generation output for the nearest 10 minutes based on the wind power generation information (step S201). The average value for the last 10 minutes is an example of the current wind power generation output, and the average value for a predetermined period before the current time is used as the current wind power generation output in order to suppress the influence of small fluctuations. Has been done.

The target value calculation unit 14 uses a lookup table showing the correlation between the average value of the nearest 10 minutes and the average value of the wind power output for the next 3 hours, and outputs the average value of the wind power output for the next 3 hours. Acquire the representative value of the assumed range (step S202). The look-up table used here is an example of information used by the target value calculation unit 14 to calculate a representative value of the expected output range of the wind power generation output, and is included in the reference information. In addition, the look-up table defines the relationship between the current wind power generation output and the expected output range in advance, and is created based on, for example, the wind power generation output data accumulated in the past.

FIG. 5 is a diagram showing an example of data for creating a look-up table used by the target value calculation unit 14 shown in FIG. FIG. 5 is created based on the wind power output data accumulated in the past. The horizontal axis of FIG. 5 shows the average value of the wind power generation output for the nearest 10 minutes in the past from a certain point in time. The vertical axis of FIG. 5 shows the average value of the wind power generation output for 3 hours from a certain point in the future. FIG. 5 shows data in which the average output of the wind power generation output accumulated in the past for a predetermined period is associated with the output value at the start of the period. The predetermined period is, for example, 3 hours, and the output value at the start time of the period is the average value of the nearest 10 minutes before the start time. At this time, the predetermined period for calculating the output value at the start time is sufficiently shorter than the predetermined period for calculating the future average output value. Further, in FIG. 5, the variation of the data is shown in a box plot. The rectangular box in the middle of the box plot shows a variance range of ± 25.0%, and the centerline of the box shows the median. The straight line extending from the box, also called the whiskers, shows a dispersion range of ± 99.9%. Outliers out of range including the box and whiskers are shown in the plot.

The look-up table is created based on the lower limit line 51, which indicates the lower limit of the average output value for the next 3 hours of a plurality of data having the same wind power output at the start of the period. The lower limit line 51 is generated based on the minimum value among the average output values of a plurality of data having the same average value in the nearest 10 minutes for the next 3 hours. At this time, in order to exclude outliers, the minimum value can be the lower limit value in the range of ± 99.9% shown in the box plot. The lower limit line 51 may be a curve connecting the lower limit values in the range of ± 99.9% of the boxplot, or may be a straight line that approximates the lower limit value in the range of ± 99.9%.

Returning to the description of FIG. The target value calculation unit 14 sets a value obtained by adding the amount of electricity stored in the storage battery system 2 to the representative value calculated in step S202 as the target value of the interconnection point power (step S203). The target value calculation unit 14 corrects the target value of the interconnection point power based on the interconnection condition (step S204).

FIG. 6 is a diagram showing an example of a target value of the interconnection point power calculated by the target value calculation unit 14 shown in FIG. The target value calculated in step S203 of FIG. 4 is the target value 52-1 shown in FIG. 6 when the SOC (State Of Charge) indicating the charge amount of the storage battery system 2 is 100%. When the SOC of the storage battery system 2 is 50%, the target value calculated in step S203 of FIG. 4 is the target value 52-2 shown in FIG. Here, the target value 52-2 is adjusted so as not to exceed the current wind power generation output 53.

In wind power generation, if the amount of power that can be reverse-powered is too large, it is possible to adjust the amount of power that can be reverse-powered to the power system 4 by stopping the wind power generation device 3 and satisfy the interconnection condition. However, when the amount of power that can be reverse power flow is insufficient, there is no means for adjusting the amount of power, and it becomes difficult to satisfy the interconnection condition. Therefore, in the present embodiment, the SOC is added to the lower limit value among the values that can be taken as the average value for 3 hours in the future to calculate the target value of the wind power generation output. As a result, it is possible to suppress the occurrence of a state in which the power to be reverse-fed to the power system 4 is insufficient and the connection condition to the power system 4 cannot be satisfied.

Here, the effect of this embodiment will be described. FIG. 7 is a diagram showing an example of the wind power generation output of each of the wind power generation devices 3-1 and 3-2 shown in FIG. The horizontal axis of FIG. 7 is time, and the vertical axis is wind power output.

The wind power output of the wind power generation device 3-1 is 100 MW regardless of the time. The wind power generation output of the wind power generation device 3-2 is 50 MW until the time t1, and changes to 100 MW after the time t1.

FIG. 8 is a diagram showing the total wind power generation output of the plurality of wind power generation devices 3-1 and 3-2 shown in FIG. 7. As shown in FIG. 8, the total of the wind power generation output of the wind power generation device 3-1 and the wind power generation output of the wind power generation device 302 is 150 MW until the time t1 and 200 MW after the time t1. At this time, if the wind power generation output that can be supplied to the power system 4 is set as the target value of the interconnection point power as it is, the interconnection point power suddenly changes at time t1 as shown in FIG. In this case, the interconnection condition imposed on the amount of change in the interconnection point power per hour cannot be satisfied. Therefore, the control device 1 uses the charge / discharge function of the storage battery system 2 to control the target value of the interconnection point power so that the amount of change in the interconnection point power per hour satisfies the interconnection condition.

FIG. 9 is a diagram showing a comparative example of the target value of the interconnection point power set in the case of the wind power generation output shown in FIG. FIG. 10 is a diagram showing an example of a target value of interconnection point power set by the control device 1 shown in FIG. 2 in the case of the wind power generation output shown in FIG.

In the comparative example, the expected output range of the future wind power output is not used, and the target value of the interconnection point power is set based on the current wind power output. Therefore, the target value of the interconnection point power gradually increases after the time t1 so that the amount of change per hour satisfies the interconnection condition. At this time, the difference between the wind power generation output and the interconnection point power is charged in the storage battery system 2.

On the other hand, the control device 1 according to the present embodiment obtains the expected output range of the wind power generation output, and calculates the target value of the interconnection point power based on the representative value of the assumed output range, for example, the lower limit value. Therefore, when it is predicted that the average value of the generated power for the next 3 hours will increase from the present at the time t2 before the time t1, the amount of electricity stored is added to the representative value of the expected output range of the wind power generation output. After setting the value as the target value, the amount of change in the target value per hour is adjusted so as to satisfy the interconnection condition. Therefore, the target value gradually increases from the time t2, and until the time t1 when the wind power generation output actually increases, the storage battery system 2 discharges to compensate for the shortage of the interconnection point power, and the wind power generation output increases at the time t1. When increased, the difference between the generated power and the interconnection point power is charged to the storage battery system 2.

FIG. 11 is a diagram showing an example of a hardware configuration for realizing the function of the control device 1 shown in FIG. The functions of the storage battery information acquisition unit 11, the wind power generation information acquisition unit 12, the reference information acquisition unit 13, the target value calculation unit 14, and the charge / discharge command unit 15 of the control device 1 are realized by using the processor 91 and the memory 92. be able to. The processor 91 is a CPU (Central Processing Unit), and is also called a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, a DSP (Digital Signal Processor), or the like. The memory 92 is, for example, a non-volatile or volatile semiconductor memory such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable ROM), EPROM (registered trademark) (Electrically EPROM). Magnetic discs, flexible discs, optical discs, compact discs, mini discs, DVDs (Digital Versatile Disks), etc.

The processor 91 realizes each function of the control device 1 by reading and executing a computer program stored in the memory 92 corresponding to the processing of each component. The memory 92 is also used as a temporary memory in each process executed by the processor 91.

As described above, according to the first embodiment of the present invention, the control device 1 is based on the expected output range of the wind power generation output based on the current wind power generation output, the storage amount of the storage battery 21, and the interconnection condition. , Calculate the target value of the power to be reverse-flowed to the power system 4. Since the expected output range is used here, when the wind power generation output increases at a certain time t1 in the future, the power stored in the storage battery system 2 is discharged from the time t2 before the time t1 when the wind power generation output increases. By doing so, the target value can be increased. Therefore, the control device 1 can increase the interconnection point power while satisfying the interconnection condition.

The target value calculation unit 14 can obtain the expected output range of the wind power generation output based on the wind power generation output accumulated in the past. In particular, the inventors of the present application have found that there is a high correlation between the mean value of the nearest 10 minutes before the present time and the mean value of the 3 hours after the present time in the wind power generation output. Therefore, the target value calculation unit 14 can calculate a representative value of the expected output range by using a table showing the relationship between the average value of the nearest 10 minutes before the present time and the average value of the 3 hours after the present time. it can. Here, the expected output range can be a range of values that the average value for 3 hours can take, and the representative value can be a lower limit value of the assumed output range.

The configuration shown in the above-described embodiment shows an example of the content of the present invention, can be combined with another known technique, and is one of the configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

For example, in the above embodiment, the storage battery system 2 has a plurality of storage batteries 21 and the same number of PCS 22s as the storage batteries 21, but the present embodiment is not limited to such an example. The storage battery system 2 may have one PCS 22 and one large-scale storage battery 21. Further, in the present embodiment, one storage battery system 2 is installed for each of the plurality of wind power generation devices 3 to control the interconnection point power. In this case, the fluctuation of the total wind power generation output of the plurality of wind power generation devices 3 is smoothed as compared with the fluctuation of each of the plurality of wind power generation devices 3. Therefore, the capacity and charge / discharge amount of the storage battery system 2 can be suppressed as compared with the case where the storage batteries 21 are provided corresponding to each of the plurality of wind power generation devices 3 and individually controlled. Therefore, the cost and installation area required for installing the storage battery 21 can be suppressed.

Further, in the above embodiment, it has been described that the function of the control device 1 can be realized by using the processor 91 and the memory 92, but the computer program describing the function of the control device 1 is stored in the recording medium. It may be provided via a communication path. Further, the invention according to the present embodiment can also be realized as a method in which the control device 1 executes each step described in the above computer program.

1 Control device, 2 Storage battery system, 3,3-1,3-2 Wind power generation device, 4 Power system, 10 Charge / discharge system, 11 Storage battery information acquisition unit, 12 Wind power generation information acquisition unit, 13 Standard information acquisition unit, 14 Target value calculation unit, 15 charge / discharge command unit, 21 / 21-1 to 21-n storage battery, 22, 22-1 to 22-n PCS, 51 lower limit line, 52-1, 52-2 target value, 53 Current Wind power output, 91 processors, 92 memories.

Claims (10)

It is a control device that controls the charging and discharging of a storage battery that can temporarily store the power generated by the wind power generation device and reverse the stored power to the power system.
A storage battery information acquisition unit that acquires storage battery information including the amount of electricity stored in the storage battery, and a storage battery information acquisition unit.
The wind power generation information acquisition department that acquires wind power generation information including wind power generation output,
A target value calculation unit that calculates a target value of power to be reverse-flowed to the power system based on the expected output range of the wind power output based on the wind power generation information, the storage battery information, and the interconnection condition of the power system. ,
A charge / discharge command unit that calculates a charge / discharge command value for the storage battery based on the target value,
A control device comprising. The control device according to claim 1, wherein the target value calculation unit obtains the expected output range based on the wind power generation output accumulated in the past. The target value calculation unit calculates the representative value using a table in which the relationship between the current wind power generation output and the representative value within the expected output range is determined in advance, and the calculated representative value and the stored electricity are stored. The control device according to claim 1, wherein the target value is calculated based on the sum of the amounts. The control device according to claim 3, wherein the representative value is a lower limit value of the expected output range. The control device according to claim 3 or 4, wherein the target value calculation unit uses the average value of the wind power generation output for a predetermined period prior to the present time as the current wind power generation output. The wind power generation information includes a plurality of wind power generation outputs.
The control device according to claim 3, wherein the target value calculation unit sets an average value of the total of the plurality of wind power generation outputs for a predetermined period before the present time as the current wind power generation output. The storage battery information includes a plurality of storage amounts of the storage batteries.
The control device according to any one of claims 1 to 6, wherein the charge / discharge command unit calculates a charge / discharge command value for each of the plurality of storage batteries. The control device according to any one of claims 1 to 7, wherein the interconnection condition includes that the rate of change of the value of the power flowing back to the power system is within the reference range. A storage battery that can temporarily store the power generated by wind power generation,
A control device that controls interconnection power, which is power that reverse power flows into the power system by controlling the charging and discharging of the storage battery.
With
The control device is
A storage battery information acquisition unit that acquires storage battery information including the amount of electricity stored in the storage battery, and a storage battery information acquisition unit.
The wind power generation information acquisition department that acquires wind power generation information including wind power generation output,
A target value calculation unit that calculates a target value of the interconnection power based on the expected output range of the wind power generation output based on the wind power generation information, the storage battery information, and the interconnection condition of the power system.
A charge / discharge command unit that calculates a charge / discharge command value for the storage battery based on the target value,
A charge / discharge system characterized by having. Steps to acquire storage battery information including the amount of electricity stored in the storage battery,
Steps to get wind power information, including wind power output,
A step of calculating a target value of power flowing back to the power system based on the expected output range of the wind power output based on the wind power information, the storage battery information, and the interconnection condition of the power system.
A step of calculating a charge / discharge command value for the storage battery based on the target value, and
A charge / discharge control program characterized by having a computer execute.

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