JPWO2018193689A1 - Operating method of storage battery, storage battery system, and program - Google Patents

Abstract

A method of operating a storage battery in which a storage battery is provided in addition to a generator using natural energy, and the storage battery is charged and discharged in accordance with the amount of power generated by the generator. The combined output at each time so that the variation per unit time in the combined output obtained by combining the discharge amount or the charge amount does not decrease or increase in the middle during a predetermined time zone, or does not increase or decrease in the middle. A method of operating a storage battery, wherein the target value of the storage battery is set based on the expected power generation amount after the end time of the predetermined time period, and the storage battery is charged and discharged based on the target value.

Description

The present invention relates to a storage battery operation method, a storage battery system, and a program.
This application claims priority based on Japanese Patent Application No. 2017-082698 filed on Apr. 19, 2017, and incorporates all the contents described in the Japanese application.

  Patent Literatures 1 and 2 disclose that a redox flow battery (hereinafter sometimes referred to as an RF battery), which is one of storage batteries, is attached to a wind power generator, and charges and discharges the RF battery according to the amount of power generated by the wind power generator. It is disclosed that a combined output of the generated power and the discharge power or charge power of the RF battery (hereinafter, sometimes referred to as battery output) is supplied to the load.

JP 2003-317663 A JP 2006-147306 A

  An operation method of a storage battery according to the present disclosure is a storage battery operation method of attaching a storage battery to a generator using natural energy and charging / discharging the storage battery in accordance with the amount of power generated by the generator. The target value of the combined output at each time is set so that the change per unit time in the combined output obtained by combining the expected power generation amount at each time and the discharge amount or charge amount of the storage battery satisfies a predetermined range, The storage battery is charged and discharged based on the target value.

  The storage battery system according to the present disclosure is a storage battery system that is provided alongside a generator that uses natural energy and performs charging and discharging in accordance with the amount of power generated by the generator, and is based on an estimated power generation amount at each time in the generator. Value, a provisional value calculation unit for calculating a provisional composite output obtained by combining the rated output of the storage battery, and correcting the provisional composite output so that the amount of change per unit time satisfies a predetermined range. A target value calculation unit that calculates a target value of the combined output at a time.

  The program according to the present disclosure is based on an estimated power generation amount at each time in the generator in order to charge / discharge a storage battery attached to the generator according to the power generation amount of the generator using natural energy. Value, a provisional value calculation step of calculating a provisional composite output obtained by combining the rated output of the storage battery, and correcting the provisional composite output so that the amount of change per unit time satisfies a predetermined range. And a target value calculating step of calculating a target value of the combined output at a time.

A wind farm according to the present disclosure includes the storage battery system according to the present disclosure.
A solar power plant according to the present disclosure includes the storage battery system according to the present disclosure described above.

  The present invention can be realized not only as a storage battery system including the above-described characteristic control unit, but also as a program for causing a computer to execute the above-described characteristic steps, or as described above. It can be realized as a method of operating a storage battery having various characteristic processes as steps.

FIG. 1 is a schematic configuration diagram and a functional block diagram of the storage battery system according to the first embodiment. FIG. 2 is a functional block diagram centered on a calculation unit provided in the storage battery system of the first embodiment. FIG. 3 is an example of a flowchart showing a process of setting a discharge priority value in a designated time zone (reduction prohibited). FIG. 4 is an example of a flowchart showing a process of setting a charging priority value in a designated time zone (reduction prohibition). FIG. 5 is an example of a flowchart showing a process of setting an intermediate value in a designated time zone (reduction prohibited). FIG. 6 is an example of a flowchart showing a process of setting a discharge priority value in a designated time zone (increase prohibition). FIG. 7 is an example of a flowchart showing a process of setting a charging priority value in a designated time zone (increase prohibition). FIG. 8 is an example of a flowchart showing a process of setting an intermediate value in a designated time period (increase prohibition). FIG. 9 is an example of a flowchart showing a process of setting a discharge priority value in a designated time zone (change prohibition). FIG. 10 is an example of a flowchart showing a process of setting a charging priority value in a designated time zone (change prohibition). FIG. 11 is an example of a flowchart showing a process of setting an intermediate value in a designated time zone (change prohibition). FIG. 12 is an example of a flowchart showing the contents of processing for a sudden decrease in a non-designated time zone. FIG. 13 is an example of a flowchart showing the contents of processing for a sudden increase in a non-designated time slot. FIG. 14 is an explanatory diagram illustrating a procedure for setting a discharge priority value in a designated time zone (reduction prohibited). FIG. 15 is an explanatory diagram illustrating a procedure for setting a charge priority value in a designated time zone (reduction prohibition). FIG. 16 is an explanatory diagram illustrating a procedure for setting an intermediate value in a designated time period (decrease prohibition). FIG. 17 is an explanatory diagram illustrating a procedure for setting a discharge priority value in a designated time zone (increase prohibition). FIG. 18 is an explanatory diagram illustrating a procedure for setting a charge priority value in a designated time zone (increase prohibition). FIG. 19 is an explanatory diagram illustrating a procedure for setting a discharge priority value in a specified time zone (increase / decrease prohibition). FIG. 20 is an explanatory diagram illustrating a procedure for setting a charge priority value in a designated time zone (increase / decrease prohibition). FIG. 21 is an explanatory diagram illustrating a procedure for setting a target value of a combined output corresponding to a rapid decrease in a non-designated time zone. FIG. 22 is an explanatory diagram illustrating a procedure for setting a target value of a combined output corresponding to a sudden increase in a non-designated time zone.

[Problems to be solved by the present disclosure]
In the power generation using natural energy such as wind power or solar power, the amount of power generation is not stable, and it is desired to more stably supply the generated power to the load. As described above, by combining the battery output of the storage battery such as the RF battery and the generated power, the power supplied to the load can be easily stabilized. In particular, if the rated output of the storage battery (the amount of discharge or charge that can be continuously output by the storage battery) is approximately the same as the rated output of the generator (the amount of power that can be continuously output by the generator), Even if the change is large (increase or decrease), the storage battery can be charged and discharged according to the change. Therefore, even when the short-cycle change amount, for example, the change amount per minute, is limited to satisfy a predetermined range with respect to the combined output of the battery output and the generated power, the load is satisfied while satisfying this limit request. Power can be supplied to However, in this case, a large-capacity storage battery having a large rated output is required. Therefore, there is a demand for a method of operating a storage battery that can respond to the above-described short-period change limit requirement even for a storage battery having a small rated output and a small capacity.

  Further, it is conceivable that the amount of change in a certain time period, for example, two hours or three hours, that is, the amount of change in a long cycle, is limited so as to satisfy a predetermined range. For example, it is preferable that the power supply to the load is not reduced in a time zone in which the power consumption is likely to increase, such as in the morning or the evening, and that the power supply to the load is not increased in a time zone in which the power consumption is likely to decrease, such as midnight. Conceivable. Therefore, there is a demand for a method of operating a storage battery that can respond to a request for limiting the amount of change in a long cycle even if the storage battery has a small capacity.

  Therefore, it is an object to provide a method of operating a storage battery that can stably supply power to a load even if the storage battery provided with a generator using natural energy has a small capacity.

  Further, to provide a storage battery system, a program, a wind farm, and a solar power plant capable of stably supplying power to a load even if a storage battery provided with a generator using natural energy has a small capacity. Is one of the other purposes.

[Effects of the present disclosure]
According to the operation method of the storage battery, the storage battery system, the program, the wind farm, and the solar power plant, even if the storage battery attached to the generator using the natural energy has a small capacity. Power can be stably supplied to the load.

[Description of Embodiment of the Present Invention]
First, the contents of the embodiment of the present invention will be listed and described.

At least some of the embodiments described below may be arbitrarily combined.
(1) A method for operating a storage battery according to one embodiment of the present invention is a storage battery operation method in which a storage battery is provided in addition to a generator using natural energy, and the storage battery is charged and discharged in accordance with the amount of power generated by the generator. The combined output at each time so that the amount of change per unit time in the combined output obtained by combining the expected power generation amount at each time in the generator and the discharge amount or charge amount of the storage battery satisfies a predetermined range. Is set, and the storage battery is charged and discharged based on the target value.

  The expected power generation amount includes, for example, a value predicted by a known method based on past power generation results and power generation conditions (air flow, wind direction, sunshine duration, etc.) at the installation location of the generator.

  The change amount per unit time here is a change amount in a relatively short time, such as “unit time” of 15 minutes or less, further 10 minutes or less, and 5 minutes or less, and typically, change per minute. Quantity. Hereinafter, it may be referred to as a short-period change amount.

According to the operation method of the storage battery, the target value of the combined output obtained by combining the output of the generator (the amount of power generation) and the output of the storage battery (the amount of discharge or the amount of charge) is utilized by using the expected amount of power generation of the generator. Set. Since the expected power generation amount is used, it is possible to obtain a combined output appropriately corresponding to the actual power generation state of the generator. In addition, the target value is set such that the short-term variation in the target value of the composite output satisfies a predetermined range. Since the short-period change amount is taken into consideration, an appropriate combined output can be obtained even when the short-period change amount is limited. In order to set the target value under specific conditions as described above, the rated output Rb of the storage battery may be smaller than the rated output Rg of the generator and may be smaller, for example, about 50% or less of the rated output Rg of the generator. In addition, it is possible to stably supply power to the load by satisfying the requirement for limiting the amount of change in the short cycle. Therefore, according to the above-described operation method of the storage battery, even if the storage battery attached to the generator using natural energy has a small capacity, power can be stably supplied to the load.
(2) As an example of the operation method of the storage battery, the target value does not decrease, does not increase, or does not increase or decrease in the course of the combined output per unit time in a predetermined time zone. Is set.

In the above embodiment, since the change value per unit time is specified and the target value of the combined output is set, the short-cycle change amount and the long-cycle change amount in a predetermined time zone satisfy a predetermined range. Can be set to the target value. Therefore, according to the above embodiment, even when the amount of change in the long cycle is limited in addition to the amount of change in the short cycle, the limitation requirement is satisfied, and power can be stably supplied to the load.
(3) As an example of the operation method of the storage battery of the above (2), there is a form in which the target value in the predetermined time zone is set based on the expected power generation amount after the end time of this time zone.

In the above embodiment, the target value of the combined output can be set in consideration of the end time of the time zone in addition to the predetermined time zone. Therefore, according to the above-described embodiment, even when the amount of power generation changes suddenly (even if the power generation amount suddenly decreases or increases) immediately after the end time of the predetermined time zone in a case where the amount of change in the short cycle is limited, the restriction request is more reliably performed. , And the power can be stably supplied to the load.
(4) As an example of the operation method of the storage battery according to the above (2) or (3), as the target value in the predetermined time zone, a range in which the discharge amount of the storage battery can reduce the power generation suppression of the generator. A mode in which at least one selected from a discharge priority value that maximizes, a charge priority value that maximizes the charge amount of the storage battery in the range, and an intermediate value between the discharge priority value and the charge priority value is set. Can be

Here, when the power generation amount of the generator exceeds the chargeable amount of the storage battery, it is desired to suppress the power generation by the generator, but this power generation suppression can be said to be a loss. In the above-described embodiment, even when a small-capacity storage battery is used, the target value of the combined output that can reduce the power generation suppression of the generator as much as possible can be easily set, so that the loss due to the power generation suppression can be easily reduced.
(5) A storage battery system according to one embodiment of the present invention is a storage battery system that is provided alongside a generator using natural energy and performs charging and discharging in accordance with the amount of power generated by the generator. A provisional value calculation unit for calculating a provisional composite output obtained by combining a value based on the expected power generation amount at the time and the rated output of the storage battery; and the provisional combination so that the amount of change per unit time satisfies a predetermined range. A control unit that corrects the output and calculates a target value of the combined output at each time.

In the above-described storage battery system, the control unit obtains a tentative combined output obtained by combining the output of the generator and the output of the storage battery by using the expected power generation amount of the generator and the rated output Rb of the storage battery. Is corrected so that the short-period change amount in the predetermined range satisfies a predetermined range, and a target value of the combined output is set based on the corrected value. Since the expected power generation amount is used, it is possible to obtain a combined output appropriately corresponding to the actual power generation state of the generator. In addition, since the short-period change amount is taken into consideration, an appropriate combined output can be obtained even when the short-period change amount is limited. In order to set the target value under specific conditions in this way, even if the rated output Rb of the storage battery is smaller than the rated output Rg of the generator as described above, the short-cycle change amount restriction requirement is satisfied, Power can be supplied stably to the load. Therefore, according to the storage battery system described above, power can be stably supplied to the load even if the storage battery provided with the generator using natural energy has a small capacity.
(6) The program according to an aspect of the present invention includes a computer for charging / discharging a storage battery attached to the generator according to a power generation amount of the generator using natural energy. A provisional value calculating step of calculating a provisional composite output obtained by combining a value based on the expected power generation amount at the time and the rated output of the storage battery; and providing the provisional composite so that the amount of change per unit time satisfies a predetermined range. And a target value calculating step of calculating a target value of the combined output at each time.

The above program is used for a computer that controls charging and discharging of a storage battery provided in conjunction with a generator using natural energy. The above program obtains a temporary composite output obtained by combining the output of the generator and the output of the storage battery using the expected power generation amount of the generator and the rated output Rb of the storage battery in the computer. The amount of change in the short cycle is corrected so as to satisfy a predetermined range, and the target value of the combined output is set based on the corrected value. Since the expected power generation amount is used, it is possible to obtain a combined output appropriately corresponding to the actual power generation state of the generator. In addition, since the short-period change amount is taken into consideration, an appropriate combined output can be obtained even when the short-period change amount is limited. In order to set the target value under specific conditions in this way, even if the rated output Rb of the storage battery is smaller than the rated output Rg of the generator as described above, the short-cycle change amount restriction requirement is satisfied, Power can be supplied stably to the load. Therefore, by causing the computer to execute the program, even if the storage battery has a small capacity, power can be stably supplied to the load.
(7) As an example of the above-described program, in the target value calculation step, the amount of change in the combined output per unit time in a predetermined time zone does not decrease or increase in the middle, or does not increase or decrease in the middle. An example in which the temporary composite output is corrected is described below.

In the above embodiment, since the change value per unit time is specified and the target value of the combined output is set, the short-cycle change amount and the long-cycle change amount in a predetermined time zone satisfy a predetermined range. Can be set to the target value. Therefore, according to the above aspect, by causing the computer that controls the charge and discharge of the storage battery to execute the above, in addition to the short-cycle change amount, the limit request is satisfied even when the long-cycle change amount is limited, Power can be supplied stably to the load.
(8) As an example of the program of the above (7), in the provisional value calculating step, the provisional composite output in the predetermined time period is output at each time outside the time period and after the end time of the time period. In which the value based on the expected power generation amount at the end time is calculated so that the amount of change per unit time of the expected power generation amount per unit time satisfies the predetermined range.

In the above embodiment, since the provisional composite output at the end time of the predetermined time zone is first set, the target value of the composite output can be set in consideration of the predetermined time zone and the end time of this time zone. Therefore, according to the above embodiment, by causing the computer that controls the charging and discharging of the storage battery to execute the above, when there is a limitation on the amount of change in a short cycle, the amount of power generation suddenly changes immediately after the end time of a predetermined time zone or the like. However (even if it suddenly decreases or increases rapidly), the restriction requirement can be satisfied more reliably, and the power can be stably supplied to the load.
(9) As an example of the program of (7) or (8), in the target value calculation step, the discharge amount of the storage battery reduces the power generation suppression of the generator as the target value in the predetermined time zone. Calculate at least one selected from a discharge priority value that maximizes in a possible range, a charge priority value that maximizes the charge amount of the storage battery in the range, and an intermediate value between the discharge priority value and the charge priority value. Form.

  In the above embodiment, even if the storage battery has a small capacity, the target value of the combined output that can reduce the power generation suppression of the generator as much as possible can be easily set, so that the loss due to the power generation suppression can be easily reduced.

In addition, the computer which controls the charge and discharge of the storage battery reads a computer-readable recording medium storing the program according to any one of the above (6) to (9), and executes the program. By doing so, it is possible to stably supply power to the load even if the storage battery attached to the generator using natural energy has a small capacity as described above.
(10) A wind farm according to one aspect of the present invention includes the storage battery system according to (5).

According to the above-mentioned wind farm, since the above-mentioned storage battery system is provided, even if the storage battery provided along with the wind power generator has a small capacity, power can be stably supplied to the load.
(11) A solar power plant according to one aspect of the present invention includes the storage battery system according to (5).

According to the above-mentioned solar power plant, since the above-mentioned storage battery system is provided, even if the storage battery attached to the solar power generator has a small capacity, power can be stably supplied to the load.
[Details of Embodiment of the Present Invention]
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings as appropriate. In the drawings, the same reference numerals indicate the same names.
[Embodiment 1]
(Overview of Embodiment)
With reference to FIG. 1 as appropriate, an outline of the operation method of the storage battery of the first embodiment, the storage battery system 1 of the first embodiment, and the program of the first embodiment will be described.

  The operation method of the storage battery according to the first embodiment is used for attaching the storage battery 10 to the generator 420 using natural energy and charging and discharging the storage battery 10 according to the amount of power generated by the generator 420. In this example, a wind power generator is illustrated as the generator 420, and a redox flow battery (RF battery) is illustrated as the storage battery 10. The storage battery 10 is typically connected to a generator 420 and a load 440 such as a power system or a consumer via an AC / DC converter 400 or a substation facility 410. The storage battery 10 is charged and discharged according to the amount of power generated by the generator 420, and a combined output obtained by combining the amount of power generated by the generator 420 and the amount of charge or discharge of the storage battery 10 is supplied to the load 440.

  The operation method of the storage battery according to the first embodiment is based on the change per unit time of the combined output obtained by combining the expected power generation amount Pe at each time in the generator 420 and the discharge amount or charge amount of the storage battery 10 (short-cycle change amount ΔX ) Satisfy the predetermined range, the target value Xt of the combined output at each time is set. The storage battery 10 is charged and discharged based on the set target value Xt.

  The following storage battery system 1 of the first embodiment can be used for implementing the operation method of the storage battery of the first embodiment. The storage battery system 1 according to the first embodiment is provided alongside a generator 420 using natural energy, and performs charging and discharging according to the amount of power generated by the generator 420. The storage battery system 1 includes a storage battery 10 and a control unit 2 that controls charging and discharging of the storage battery 10. The control unit 2 includes a provisional value calculation unit 21 that calculates a provisional combined output Xi obtained by combining a value based on the expected power generation amount at each time in the generator 420 and the rated output of the storage battery 10, and a change per unit time. A target value calculation unit 22 that corrects the provisional synthesized output Xi so that the amount (short-cycle change amount ΔX) satisfies a predetermined range, and calculates a target value Xt of the synthesized output at each time. The wind farm according to the first embodiment includes a wind power generator (power generator 420) and the storage battery system 1 according to the first embodiment.

As the control unit 2, a computer including an operation unit 20 that can calculate an operation value such as a target value Xt of the combined output can be used. The control unit 2 includes a computer, and each function of the control unit 2 is exerted by executing a computer program (a program according to the first embodiment) stored in a storage device of the computer by a CPU of the computer. It can be. For example, the control unit 2 can include a storage unit 201 such as a hard disk drive (HDD) that stores the program of the first embodiment. In this case, by causing the computer (control unit 2) to execute the following program of the first embodiment called from the storage unit 201, the storage battery 10 can be charged and discharged according to this program. The program according to the first embodiment causes the computer (control unit 2) to execute the following steps in order to charge and discharge the storage battery 10 attached to the generator 420 according to the amount of power generated by the generator 420 using natural energy. It is to make it.
(Tentative value calculation step)
A tentative combined output Xi obtained by combining the value based on the expected power generation amount Pe at each time in the generator 420 and the rated output Rb in the storage battery 10 is calculated.
(Target value calculation step)
The provisional composite output Xi is corrected so that the variation per unit time (short-cycle variation ΔX) satisfies a predetermined range, and the target value Xt of the composite output at each time is calculated.

A computer-readable recording medium on which the program of the first embodiment is recorded can be prepared, and the computer (control unit 2) can read the program of the first embodiment and store the program in the storage unit 201. Examples of the recording medium include a compact disk (CD), a digital versatile disk (DVD), and various recording devices detachable from a computer such as a universal serial bus (USB), a flash drive, and a memory card. .
(Other basic configurations, etc.)
The control unit 2 includes an arithmetic unit 20, a storage unit 201, an input / output unit 202 used for input / output of various signals (information), a determination unit 203 that performs various determinations according to input signals, and the like, An instruction unit 204 for issuing various instructions according to the determination result of the unit 203 or the operation result of the operation unit 20, a timer unit 205 for measuring the current time, and the like can be provided. In addition, when the control unit 2 is connected to a monitor 3 for displaying input contents and calculation contents, and a direct input unit 4 (eg, a keyboard or the like) capable of directly inputting information by an operator, confirmation and operation by the operator are performed. Easy to do.

  The control unit 2 is configured so that the expected power generation amount of the generator 420 is stored in the storage unit 201, and that the calculation unit 20 calls up the expected power generation amount from the storage unit 201 and uses it for calculation. Further, the control unit 2 can be configured so that the calculation unit 20 sets the target value Xt of the combined output for several consecutive hours at a time (see a specific example described later). If the target value Xt for a certain continuous time is set at one time, that is, if the target value Xt is set for each predetermined set section, the setting operation may be performed intermittently, which is efficient. If the length of the set section is, for example, about 1 hour or more and about 10 hours or less, and further about 2 hours or more and about 7 hours or less, even if a difference in the combined output based on the difference between the planned power generation amount and the actual power generation amount occurs, This deviation is easy to correct, and the calculation of the target value Xt is hard to be complicated. For example, the length of the set section, the start time and the end time, and the time at which the calculation process of the target value Xt is performed are set in advance, and the determination unit 203 calls up the current time from the timer unit 205 and performs the calculation process. It is determined whether or not the execution time is reached. If the execution time is reached, the calculation unit 20 can configure the control unit 2 to perform the calculation processing of the target value Xt for a predetermined set section. Further, the determination unit 203 determines whether the set section includes a specified time zone described later, and in accordance with the determination result, the calculation unit 20 performs calculation processing of the target value Xt for the predetermined set section. , The control unit 2 can be configured.

A known configuration can be used for the wind power generator and the RF battery. The RF battery typically includes a battery cell 10C and a supply mechanism that supplies an electrolytic solution to the battery cell 10C. The battery cell 10C includes a positive electrode 14 to which a positive electrode electrolyte is supplied, a negative electrode 15 to which a negative electrode electrolyte is supplied, and a diaphragm 11 interposed between the electrodes 14,15. Although FIG. 1 shows a single battery cell 10C, a stack called a cell stack in which a plurality of battery cells 10C are stacked is typically used. The supply mechanism includes a positive electrode tank 16 and a negative electrode tank 17 for storing the electrolyte of each electrode, pipes 162, 164, 172, and 174 connecting the tanks 16 and 17 and the battery cell 10C, and supply-side pipes 162 and 172. And the pumps 160 and 170 provided in the main body. In FIG. 1, the ions shown in each of the tanks 16 and 17 represent an example of the ion species contained in the electrolyte of each electrode.
(Procedure for setting the target value of composite output)
Hereinafter, with respect to the operation method of the storage battery of the first embodiment, the control unit 2 included in the storage battery system 1 of the first embodiment, and the program of the first embodiment, the procedure for setting the target value Xt of the combined output is described in the following patterns [1] and [2]. ] Will be described in detail. In both [1] and [2], the length of the set section is a time selected from 2 hours to 7 hours.
((Overview of pattern))
[1] A time period in which a change direction of a change amount per unit time (short-cycle change amount ΔX) of a combined output obtained by combining an expected power generation amount of a generator and a discharge amount or a charge amount of a storage battery is set in a set section. (Hereinafter, sometimes referred to as a designated time zone) In this case, in addition to the short-term variation ΔX of the combined output, the combined output is changed so that the long-cycle variation of the combined output also satisfies a predetermined range. The output target value Xt is set.
[1-A] When providing a time zone in which the short period change amount ΔX is prohibited from decreasing [1-B] In case a time zone in which an increase in the short period change amount ΔX is prohibited [1-C] When providing a time zone in which increase / decrease of change amount ΔX is prohibited [2] When no increase / decrease direction of short-period change amount ΔX is specified in set section (non-designated time zone)
In this case, the target value Xt of the combined output is set such that the short-term variation ΔX of the combined output satisfies a predetermined range.

  In the case of [1-A], as the operation method of the storage battery of the first embodiment, the target value Xt of the combined output is reduced in the middle while the short-period variation ΔX of the combined output in this time zone satisfies a predetermined range. That is, setting is not performed, that is, setting is performed so as to increase or to maintain a constant value without substantially increasing or decreasing. As the program of the first embodiment, in the target value calculation step, the temporary synthesized output Xi is corrected so that the short-term variation amount ΔX of the synthesized output in this time zone satisfies a predetermined range and does not decrease halfway. A configuration for calculating the target value Xt of the combined output may be mentioned.

  In the case of [1-B], as the operation method of the storage battery according to the first embodiment, the combined output target value Xt is increased in the middle while the short-period variation ΔX of the combined output in this time zone satisfies a predetermined range. That is, setting is not performed, that is, setting is performed so as to decrease or to maintain a constant value without substantially increasing or decreasing. As a program of the first embodiment, in the target value calculation step, the temporary synthesized output Xi is corrected so that the short-term variation amount ΔX of the synthesized output in this time zone satisfies a predetermined range and does not increase in the middle. A configuration for calculating the target value Xt of the combined output may be mentioned.

  In the case of [1-C], as the operation method of the storage battery according to the first embodiment, the combined output target value Xt is set such that the short-period variation ΔX of the combined output in this time zone satisfies a predetermined range and is substantially halfway. Setting so that it does not increase or decrease. As a program of the first embodiment, in the target value calculation step, the temporary synthesized output Xi is corrected so that the short-term variation ΔX of the synthesized output in this time zone satisfies a predetermined range and does not substantially increase or decrease in the middle. Then, a configuration may be adopted in which the target value Xt of the combined output is calculated.

  In the case of [1] in which the designated time zone is provided, by setting the target value Xt of the combined output as described above, a restriction request is issued even when the amount of change in the long cycle is limited in addition to the amount of change in the short cycle. Thus, the power can be stably supplied to the load 440. Further, for at least one of the three designated time zones [1-A], [1-B], and [1-C], the target value Xt in this time zone is calculated by calculating the expected power generation after the end time of this time zone. It is preferable to set based on the amount Pe. By setting the target value Xt in consideration of the end time of the designated time zone or later, even if the power generation amount suddenly decreases or increases immediately after the designated time period or the like, the short-term change amount ΔX of the combined output falls within a predetermined range. This is because the power can be supplied more stably to the load 440 stably. In this case, for example, the combined output at the end time of the designated time zone may be set as the setting start value of the target value Xt. Further, for at least one of the three designated time zones, a discharge priority value Xd that maximizes a discharge amount of the storage battery 10 within a range in which suppression of power generation of the generator 420 can be reduced as a target value Xt in the time zone, One selected from a charge priority value Xc at which the charge amount of the storage battery 10 becomes maximum in the above range and an intermediate value Xm between the discharge priority value Xd and the charge priority value Xc can be set. In this case, since the target value Xt that can reduce the power generation suppression of the generator 420 as much as possible can be set, the loss due to the power generation suppression can be easily reduced. Of the above three values, a plurality of values may be set as candidates, and the target value Xt may be selected from the plurality of candidates.

In the case of [2], which is a non-designated time zone, by setting the target value Xt of the combined output as described above, even if the amount of change in the short cycle is limited, the limit request is satisfied and the load 440 is stabilized. Power can be supplied.
((Overview of setting procedure for each pattern))
First, with reference to FIG. 2 to FIG. 13, only a processing procedure for setting a target value Xt of a combined output and a correspondence relationship between each procedure and each part of the functional block diagram (FIG. 2) will be described. A more detailed description will be given with reference to FIGS.

Hereinafter, referring to FIGS. 2 to 11, in the case of [1], (1) discharge priority value Xd, (2) charge priority value Xc, and (3) intermediate value Xm are set as target values Xt of the combined output. The setting procedure will be described. Here, a case where the target value Xt is set based on the expected power generation amount Pe at the end time of each of the designated time zones shown in [1-A], [1-B], and [1-C] will be exemplified. In addition, here, a time zone having a predetermined length outside the above specified time zones and continuing before and after each of the specified time zones is called an adjustment time zone, and the target value of the combined output in the adjustment time zone is also set. An example is shown below. That is, the set section of the target value Xt here includes the designated time zone and the adjustment time zone. Note that the target value of the combined output in the adjustment time zone can be set separately. In this case, the setting procedure of [2] may be used. If the target value Xt of the composite output in the designated time zone and the adjustment time zone is set collectively as in this example, the target value is not only efficient but also the short-cycle variation ΔX of the composite output is unlikely to deviate from the predetermined range. It is considered easy to set the value.
[1-A] In the case of providing a time zone in which reduction is prohibited (1) Discharge priority value Xd
In this case, the program of the first embodiment may be configured to cause a computer (control unit 2) to execute the following steps (FIG. 3).

When setting the target value Xt of the combined output in a time zone (designated time zone) in which the reduction of the short-period change amount ΔX of the combined output is prohibited, each of the values after the end time te of the designated time zone is outside the designated time zone. A value based on the expected power generation amount at the end time te is calculated so that the change amount per unit time of the expected power generation amount Pe at the time satisfies a predetermined range, and the calculated output P is combined with the rated output Rb of the storage battery 10. (Here, (P + Rb)), a reference value calculation step (SA-1) of calculating a provisional composite output (reference value Xe) at the end time te.
From the end time te toward the start time ts of the designated time zone, a value (here, (Pe + Rb)) obtained by combining the expected power generation amount Pe of the generator 420 at each time with the rated output Rb of the storage battery 10 and the reference value Xe And extracting a smaller one as a tentative composite output Xi (SA-2).
If there is a portion where the short-period variation ΔX exceeds a predetermined range and a portion where the provisional composite output Xi decreases in the extracted provisional composite output Xi, the provisional composite output is satisfied so as to satisfy the predetermined range and not decrease. Provisional value correction step of correcting Xi (SA-3)
For a predetermined time zone (adjustment time zone) outside the specified time zone and before the start time ts of the specified time zone, the combined output when the storage battery 10 is discharged most with reference to the temporary combined output Xs at the start time ts. Calculation step (SA-4)
In the provisional composite output Xi including the calculated provisional discharge value, if there is a portion where the short-period variation ΔX exceeds a predetermined range, from the adjustment time zone toward the specified time zone so as to satisfy the predetermined range. Correction step (SA-5) for correcting temporary composite output Xi
In the above program, the reference value calculation step SA-1 and the provisional value extraction step SA-2 form a provisional value calculation step, and the provisional value correction step SA-3, the discharge provisional value calculation step SA-4, and the discharge provisional value correction. A target value calculation step is performed with step SA-5. In the provisional value calculation step, the provisional composite output Xi in this time zone is calculated using the calculation value P. In the target value calculation step, the value corrected in the temporary discharge value correction step SA-5 finally corresponds to the target value Xt of the combined output, and the discharge priority value Xd is calculated as the target value Xt in this time zone. Here, the discharge priority value Xd is a maximum value within a range in which the power generation suppression of the generator 420 can be reduced as described above (the charge priority values Xc, [1-B], and [1-C] described later are also included). Similar).

In this case, the provisional value calculation unit 21 in the storage battery system 1 of the first embodiment includes a reference value calculation unit A1 that calculates the above-described reference value Xe, and a provisional value that extracts the above-described provisional composite output Xi, as shown in FIG. An extraction unit A2 is provided. The target value calculation unit 22 includes a provisional value correction unit A3 that corrects the extracted provisional composite output Xi, a provisional discharge value calculation unit A4 that calculates the composite output at the time of the maximum discharge, and a provisional discharge calculation unit A4 as described above. The provision of a provisional discharge value correcting unit A5 for correcting the provisional composite output Xi including the value is provided.
(2) Charge priority value Xc
In this case, the program of the first embodiment may be configured to cause a computer (control unit 2) to execute the following steps (FIG. 4).

When the target value Xt of the combined output is set in a time period (designated time period) in which the reduction of the short-term change amount ΔX of the combined output is prohibited, the expected power generation amount Pe of the generator 420 at each time and the rated output Rb of the storage battery are set. Value calculating step (SA-6) of calculating a provisional composite output Xi (here, (Pe-Rb)) obtained by combining
If the calculated temporary composite output Xi has a portion where the short-cycle variation ΔX exceeds a predetermined range and a portion where the temporary composite output Xi decreases, the provisional composite output is set so as to satisfy the predetermined range and not decrease. Provisional value correcting step of correcting Xi (SA-7)
Here, in the provisional value correction step, when the above-described discharge priority value Xd is set first, if there is a portion exceeding the discharge priority value Xd in the provisional composite output Xi, the discharge priority value Xd is satisfied. Can be modified.

For a predetermined time zone (adjustment time zone) outside the specified time zone and before the start time ts of the specified time zone, the combined output when the storage battery 10 is most charged based on the temporary combined output Xs at the start time ts. Calculation step (SA-8)
In the provisional composite output Xi including the calculated provisional charge value, if there is a portion where the short-cycle change amount ΔX exceeds a predetermined range, from the adjustment time zone toward the specified time zone side so as to satisfy the predetermined range. Correction step (SA-9) to correct the provisional composite output Xi
In the above program, the provisional value correction step SA-7, the provisional charge calculation step SA-8, and the provisional charge correction step SA-9 form a target value calculation step. In the target value calculation step, the value corrected in the temporary charge value correction step SA-9 finally corresponds to the target value Xt of the combined output, and the charge priority value Xc is calculated as the target value Xt in this time zone.

In this case, the provisional value calculation unit 21 in the storage battery system 1 of the first embodiment is configured to calculate the provisional composite output Xi (Pe-Rb) as described above. As shown in FIG. 2, the target value calculation unit 22 includes a provisional value correction unit A7 for correcting the calculated provisional composite output Xi, and a charge provisional value calculation unit A8 for calculating the above-described composite output when charging the most. The provision of the provisional charging value correction unit A9 for correcting the provisional composite output Xi including the provisional charging value as described above.
(3) Intermediate value Xm
In this case, the program of the first embodiment may be configured to cause the computer (control unit 2) to execute the above-described steps SA-1 to SA-9 and the following steps (FIG. 5).

An intermediate value calculation step (SA-10) of calculating an intermediate value Xm obtained by combining the discharge priority value Xd and the charge priority value Xc as a provisional synthesized output Xi.
The short-period variation ΔX in the temporary synthesized output Xi (intermediate value Xm) including the synthesized output in the predetermined time zone (adjustment time zone) outside the specified time zone and before the start time ts of the specified time zone starts. If there is a portion that exceeds a predetermined range based on the actual synthesized output Xr before the time, a non-designated correction step (SA-11) of correcting the tentative synthesized output Xi (intermediate value Xm) so as to satisfy the predetermined range. )
In the above program, the target value calculation step is formed by the intermediate value calculation step SA-10 and the unspecified correction step SA-11. In the target value calculation step, the value corrected in the non-designated correction step SA-11 finally corresponds to the target value Xt of the combined output, and the intermediate value Xm is calculated as the target value Xt in this time zone.

In this case, the target value calculation unit 22 in the storage battery system 1 of the first embodiment calculates the intermediate value calculation unit A10 that calculates the above-described intermediate value Xm and the tentative synthesized output Xi including the synthesized output in the adjustment time zone as described above. An unspecified correction unit A11 for correction is provided (see FIG. 2).
(4) Determination and Selection of Target Value One selected from the discharge priority value Xd, the charge priority value Xc, and the intermediate value Xm can be directly used as the target value Xt of the combined output. In this case, it is preferable that the arithmetic unit 20 include each element corresponding to the processing content for setting the target value Xt of the combined output, and each element shown in FIG. 2 can be omitted as appropriate. When the discharge priority value Xd is used as the target value Xt, since the storage battery 10 can control the amount of discharge with high accuracy, for example, the power supply to the load 440 is more likely to be more stable. When the charge priority value Xc is used as the target value Xt, the generated power can be charged more, so that, for example, the utilization rate of the generated power can be easily increased. When the intermediate value Xm is used as the target value Xt, for example, the stabilization of the supplied power and the improvement of the utilization rate of the generated power can be balanced.

  Alternatively, it is possible to adopt a configuration in which all three values described above are obtained and an appropriate value is selected according to the conditions. In this case, the program of the first embodiment may be configured to cause a computer (control unit 2) to execute the following steps.

At each time, the charge priority value Xc, the estimated power generation amount Pe of the generator 420, and the estimated remaining capacity of the storage battery 10 are compared, and there is a time at which the estimated remaining capacity is equal to or less than a predetermined range (for example, zero). In this case, the charging priority value Xc is selected, and the target value Xt of the combined output is corrected according to the shortage of the estimated remaining capacity.
At each time, the intermediate value Xm, the estimated power generation amount Pe of the generator 420, and the estimated remaining capacity of the storage battery 10 are compared, and there is a time when the expected remaining capacity is equal to or less than a predetermined range (for example, zero). Select the charge priority value Xc,
At each time, each of the discharge priority value Xd and the intermediate value Xm, the expected power generation amount Pe of the generator 420, and the expected remaining capacity of the storage battery 10 are compared. If there is no time to reach zero) and there is a time at which the estimated remaining capacity of the storage battery 10 is equal to or greater than a predetermined range (for example, full charge), the discharge priority value Xd is selected.
If none of the above cases apply, a target value selection step of selecting an intermediate value Xm (SA-12)
In this case, the calculation unit 20 of the control unit 2 in the storage battery system 1 of the first embodiment includes the target value selection unit 23 that selects the target value Xt of the combined output from the three candidates as described above (see FIG. 2).

As described above, by selecting the target value Xt of the combined output in consideration of the remaining capacity of the storage battery 10, the short period of the combined output due to the shortage of the remaining capacity or the full charge during operation of the storage battery system 1. It is possible to more reliably prevent the change amount ΔX from deviating from the predetermined range. If the storage battery 10 may not be able to charge the surplus power generation amount even if the target value Xt is corrected, the power generation of the generator 420 at that time may be limited ([2] described later). The same applies to the case of).
[1-B] When an increase prohibition time zone is provided (1) Discharge priority value Xd
In this case, the program of the first embodiment may be configured to cause a computer (control unit 2) to execute the following steps (FIG. 6).

When the target value Xt of the combined output is set in a time period (designated time period) in which the increase of the short-period change amount ΔX of the combined output is prohibited, each of the values is outside the designated time period and after the end time te of the designated time period. A value based on the predicted power generation amount Pe at the end time te is calculated so that the change amount per unit time of the predicted power generation amount Pe at the time satisfies a predetermined range, and the rated output Rb of the storage battery 10 is synthesized with the calculated value P. In addition to calculating the tentative composite output (here, (P + Rb)) at the end time te, the expected power generation amount Pe of the generator 420 at each time from the end time te toward the start time ts in the designated time zone is calculated. Provisional value calculation step (SB-1) of calculating a provisional combined output Xi (here, (Pe + Rb)) obtained by combining the rated output Rb of the storage battery 10
If the calculated temporary composite output Xi has a portion where the short-cycle variation ΔX exceeds a predetermined range and a portion where the temporary composite output Xi increases, the provisional composite output is set to satisfy the predetermined range and not increase. Provisional value correction step for correcting by Xi (SB-2)
For a predetermined time zone (adjustment time zone) outside the specified time zone and before the start time ts of the specified time zone, the combined output when the storage battery 10 is discharged most with reference to the temporary combined output Xs at the start time ts. Calculation step (SB-3)
In the provisional composite output Xi including the calculated provisional discharge value, if there is a portion where the short-period variation ΔX exceeds a predetermined range, from the adjustment time zone toward the specified time zone so as to satisfy the predetermined range. Correction step (SB-4) for correcting temporary composite output Xi
In the provisional value calculation step in the above program, the provisional composite output Xi in this time zone is calculated using the calculation value P. In the above program, the provisional value correction step SB-2, the provisional discharge value calculation step SB-3, and the provisional discharge value correction step SB-4 form a target value calculation step. In the target value calculation step, the value corrected in the temporary discharge value correction step SB-4 finally corresponds to the target value Xt of the combined output, and the discharge priority value Xd is calculated as the target value Xt in this time zone.

In this case, the provisional value calculation unit 21 in the storage battery system 1 of the first embodiment is configured to calculate the composite output at the end time of this time zone separately from other times as described above. The target value calculation unit 22 includes a provisional value correction unit B2 that corrects the calculated tentative composite output Xi, a tentative discharge value calculation unit B3 that calculates the above-described composite output at the time of the most discharge, and a discharge temporary value calculation unit as described above. A provision is made of a provisional discharge value correcting section B4 for correcting the provisional composite output Xi including the value (see FIG. 2).
(2) Charge priority value Xc
In this case, the program of the first embodiment may be configured to cause a computer (control unit 2) to execute the following steps (FIG. 7).

When setting the target value Xt of the combined output in a time zone (designated time zone) in which the increase of the short-period variation ΔX of the combined output is prohibited, the expected power generation amount Pe at each time in the generator 420 and the rated output Rb of the storage battery are set. Value calculating step (SB-5) of calculating a tentative synthesized output Xi (here, (Pe-Rb))
If the calculated temporary composite output Xi has a portion where the short-cycle variation ΔX exceeds a predetermined range and a portion where the temporary composite output Xi increases, the provisional composite output is set to satisfy the predetermined range and not increase. Provisional value correction step of correcting Xi (SB-6)
Here, in the provisional value correction step, when the above-described discharge priority value Xd is set first, if there is a portion exceeding the discharge priority value Xd in the provisional composite output Xi, the discharge priority value Xd is satisfied. Can be modified.

For a predetermined time zone (adjustment time zone) outside the specified time zone and before the start time ts of the specified time zone, the combined output when the storage battery 10 is most charged based on the temporary combined output Xs at the start time ts. Calculation step (SB-7)
In the provisional composite output Xi including the calculated provisional charge value, if there is a portion where the short-cycle change amount ΔX exceeds a predetermined range, from the adjustment time zone toward the specified time zone side so as to satisfy the predetermined range. Correction step for correcting provisional composite output Xi (SB-8)
In the above program, the provisional value correction step SB-6, the provisional charge value calculation step SB-7, and the provisional charge value correction step SB-8 form a target value calculation step. In the target value calculation step, the value corrected in the temporary charge value correction step SB-8 finally corresponds to the target value Xt of the combined output, and the charge priority value Xc is calculated as the target value Xt in this time zone.

In this case, provisional value calculation section 21 in storage battery system 1 of Embodiment 1 is configured to calculate provisional composite output Xi (here, (Pe−Rb)). The target value calculation unit 22 includes a provisional value correction unit B6 that corrects the calculated provisional composite output Xi, a provisional charge value calculation unit B7 that calculates the composite output when the battery is most charged, and a provisional charge calculation unit B7 as described above. The provision of a provisional charging value correction unit B8 for correcting the provisional composite output Xi including the value (see FIG. 2).
(3) Intermediate value Xm
In this case, the program of the first embodiment may be configured to cause the computer (control unit 2) to execute the above-described steps SB-1 to SB-8 and the following steps (FIG. 8).

An intermediate value calculation step (SB-9) of calculating an intermediate value Xm obtained by combining the discharge priority value Xd and the charge priority value Xc as a provisional synthesized output Xi.
The short-period variation ΔX in the temporary synthesized output Xi (intermediate value Xm) including the synthesized output in the predetermined time zone (adjustment time zone) outside the specified time zone and before the start time ts of the specified time zone starts. If there is a portion exceeding a predetermined range based on the actual synthesized output Xr before the time, a non-designated correction step (SB-10) of correcting the temporary synthesized output Xi (intermediate value Xm) so as to satisfy the predetermined range. )
In the above program, the intermediate value calculation step SB-9 and the unspecified correction step SB-10 form a target value calculation step. In the target value calculation step, the value corrected in the non-designated correction step SB-10 finally corresponds to the target value Xt of the combined output, and the intermediate value Xm is calculated as the target value Xt in this time zone.

  In this case, the target value calculation unit 22 in the storage battery system 1 of the first embodiment calculates the intermediate value calculation unit B9 that calculates the above-described intermediate value Xm, and the tentative synthesized output Xi including the synthesized output in the adjustment time zone as described above. An unspecified correction unit B10 for correction is provided (see FIG. 2).

Also in the case of [1-B], one selected from the discharge priority value Xd, the charge priority value Xc, and the intermediate value Xm is used as it is as the target value Xt of the combined output, or a condition based on these three values. Can be selected according to The details of each mode may be referred to the above [1-A] (4).
[1-C] In the case of providing a time zone in which increase / decrease is prohibited (1) Discharge priority value Xd
In this case, the program of the first embodiment may be configured to cause a computer (control unit 2) to execute the following steps (FIG. 9).

When the target value Xt of the combined output is set in a time period (designated time period) in which the increase / decrease of the short-period variation ΔX of the combined output is prohibited, each of the values is outside the designated time period and after the end time te of the designated time period. A value based on the expected power generation amount Pe at the end time te is calculated so that the amount of change per unit time of the expected power generation amount Pe at the time satisfies a predetermined range. Minimum value calculation step for extracting minimum value Pmin of expected power generation amount Pe (SC-1)
A constant value calculation step (SC-2) of calculating a fixed value (here, (Pmin + Rb)) obtained by combining the calculated minimum value Pmin and the rated output Rb of the storage battery 10 as a temporary synthesized output Xi.
For a predetermined time zone (adjustment time zone) outside the specified time zone and before the start time ts of the specified time zone, the combined output when the storage battery 10 is discharged most with reference to the temporary combined output Xs at the start time ts. Calculation step (SC-3)
In the provisional composite output Xi including the calculated provisional discharge value, if there is a portion where the short-period variation ΔX exceeds a predetermined range, from the adjustment time zone toward the specified time zone so as to satisfy the predetermined range. Correction step (SC-4) for correcting temporary composite output Xi
In the above program, the minimum value calculation step SC-1 and the constant value calculation step SC-2 form a provisional value calculation step, and the discharge temporary value calculation step SC-3 and the discharge temporary value correction step SC-4 determine the target value. Perform the calculation step. In the provisional value calculation step, the provisional composite output Xi in this time zone is calculated using the calculation value P. In the target value calculation step, the value corrected in the temporary discharge value correction step SC-4 finally corresponds to the target value Xt of the combined output, and the discharge priority value Xd is calculated as the target value Xt in this time zone.

In this case, the provisional value calculation unit 21 in the storage battery system 1 of the first embodiment includes a minimum value calculation unit C1 that calculates the above-described minimum value Pmin and a constant value that calculates the above-described constant value (Pmin + Rb), as shown in FIG. An operation unit C2 is provided. The target value calculation unit 22 includes a provisional discharge value calculation unit C3 for calculating the combined output when the discharge is most performed, and a provisional discharge value correction unit C4 for correcting the provisional combined output Xi including the provisional discharge value as described above. Preparation.
(2) Charge priority value Xc
In this case, the program of the first embodiment may be configured to cause a computer (control unit 2) to execute the following steps (FIG. 10).

When the target value Xt of the combined output is set in a time period (designated time period) in which the increase / decrease of the short-period variation ΔX of the combined output is prohibited, each of the values is outside the designated time period and after the end time te of the designated time period. A value based on the expected power generation amount Pe at the end time te is calculated so that the amount of change per unit time of the expected power generation amount Pe at the time satisfies a predetermined range. Maximum value calculation step for extracting maximum value Pmax of expected power generation amount Pe (SC-5)
A constant value calculation step (SC-6) of calculating a fixed value (here, (Pmin-Rb)) obtained by combining the calculated maximum value Pmax with the rated output Rb of the storage battery 10 as a temporary synthesized output Xi.
Here, in the constant value calculation step, when the above-described discharge priority value Xd is set, if the temporary composite output Xi exceeds the discharge priority value Xd, it can be corrected to the discharge priority value Xd. .

For a predetermined time zone (adjustment time zone) outside the specified time zone and before the start time ts of the specified time zone, the combined output when the storage battery 10 is most charged based on the temporary combined output Xs at the start time ts. Calculation step (SC-7)
In the provisional composite output Xi including the calculated provisional charge value, if there is a portion where the short-cycle change amount ΔX exceeds a predetermined range, from the adjustment time zone toward the specified time zone side so as to satisfy the predetermined range. Correction step of correcting provisional composite output Xi (SC-8)
In the above program, the maximum value calculation step SC-5 and the fixed value calculation step SC-6 form a provisional value calculation step, and the charge provisional value calculation step SC-7 and the charge provisional value correction step SC-8 determine the target value. Perform the calculation step. In the provisional value calculation step, the provisional composite output Xi in this time zone is calculated using the calculation value P. In the target value calculation step, the value corrected in the temporary charge value correction step SC-8 finally corresponds to the target value Xt of the combined output, and the charge priority value Xc is calculated as the target value Xt in this time zone.

In this case, the provisional value calculation unit 21 in the storage battery system 1 of the first embodiment calculates the above-described maximum value Pmax, as shown in FIG. 2, the maximum value calculation unit C5, and calculates the above-mentioned constant value (Pmin-Rb). It is possible to provide a constant value calculation unit C6. The target value calculation unit 22 includes a charge provisional value calculation unit C7 that calculates the combined output when the battery is most charged, and a charge provisional value correction unit C8 that corrects the provisional combined output Xi including the charge provisional value as described above. Preparation.
(3) Intermediate value Xm
In this case, the program of the first embodiment may be configured to cause the computer (control unit 2) to execute the above-described steps SC-1 to SC-8 and the following steps (FIG. 11).

An intermediate value calculation step (SC-9) of calculating an intermediate value Xm obtained by combining the discharge priority value Xd and the charge priority value Xc.
The short-period variation ΔX in the temporary synthesized output Xi (intermediate value Xm) including the synthesized output in the predetermined time zone (adjustment time zone) outside the specified time zone and before the start time ts of the specified time zone starts. If there is a portion exceeding a predetermined range based on the actual synthesized output Xr before the time, a non-designated correction step (SC-10) of correcting the temporary synthesized output Xi (intermediate value Xm) so as to satisfy the predetermined range. )
In the above program, the intermediate value correction step SC-9 and the non-designated correction step SC-10 form a target value calculation step. In the target value calculation step, the value corrected in the non-designated correction step SC-10 finally corresponds to the target value Xt of the combined output, and the intermediate value Xm is calculated as the target value Xt in this time zone.

  In this case, the target value calculation unit 22 in the storage battery system 1 according to the first embodiment calculates the intermediate value calculation unit C9 that calculates the above-described intermediate value Xm and the tentative synthesized output Xi including the synthesized output in the adjustment time zone as described above. An unspecified correction unit C10 for correction is provided (see FIG. 2).

Also in the case of [1-C], one selected from the discharge priority value Xd, the charge priority value Xc, and the intermediate value Xm is used as it is as the target value Xt of the combined output, or a condition based on these three values is used. Can be selected according to The details of each mode may be referred to the above [1-A] (4).
[2] In the case of a non-designated time zone in which the direction of increase / decrease of the short-cycle change amount ΔX is not specified In this case, even if the expected power generation amount of the generator 420 sharply decreases or increases, the short-cycle change amount ΔX Is set so as not to deviate from a predetermined range. Here, particularly, a case will be described in which target value Xt is set such that storage battery 10 secures a predetermined remaining capacity. In this case, discharge can be performed within a predetermined remaining capacity range, and power supplied to the load 440 can be easily stabilized. Here, a case where the target value Xt is set every predetermined time in a non-designated time zone will be exemplified. If the control unit 2 is configured to automatically determine the presence / absence of a sudden decrease or a sudden increase in the scheduled power generation based on the amount of change per unit time, the target value Xt can be set efficiently.
(D-1) Countermeasures against sudden decrease In this case, the program of the first embodiment may be configured to cause a computer (control unit 2) to execute the following steps (FIG. 12).

When the target value Xt of the combined output in the non-designated time zone is set, the estimated power generation amount of the generator 420 and the rated output of the storage battery 10 at each time for a predetermined set section in the non-designated time zone are used to store the storage battery. Provisional value calculation step (S2-1) of calculating a composite output when discharging the most of the 10 as a temporary composite output Xi
If there is a portion where the short-period variation ΔX in the calculated provisional composite output Xi exceeds a predetermined range with reference to the actual composite output Xr immediately before the current calculation time, the predetermined range is satisfied. Correction step for correcting the provisional composite output Xi (S2-2)
Re-correction step (S2-3) of re-correcting the correction value corrected in the temporary discharge value correction step so that the short-cycle change amount ΔX satisfies a predetermined range.
The re-correction value corrected in the re-correction step is compared with the expected remaining capacity of the storage battery 10, and if there is a time when the expected remaining capacity falls below a predetermined range, the estimated remaining capacity may satisfy the predetermined range. Correction step (S2-4) for correcting the re-correction value
In the above program, the target calculation step is formed by the temporary discharge value correction step S2-2, the re-correction step S2-3, and the remaining correction step S2-4. In the target value calculation step, the value corrected in the residual correction step S2-4 finally corresponds to the target value Xt of the combined output.

In this case, the provisional value calculation unit 21 in the storage battery system 1 of the first embodiment is configured to calculate the combined output (provisional discharge value) when the battery is discharged most. The target value calculation unit 22 corrects the provisional discharge value as described above, the correction unit D2 that corrects the provisional discharge value as described above, and the correction unit D3 that corrects the provisional discharge value as described above. The remaining correction unit D4 is provided.
(D-2) Countermeasures against a sudden increase In this case, the program of the first embodiment may be configured to cause a computer (control unit 2) to execute the following steps (FIG. 13).

When the target value Xt of the combined output in the non-designated time zone is set, the estimated power generation amount of the generator 420 and the rated output of the storage battery 10 at each time for a predetermined set section in the non-designated time zone are used to store the storage battery. Provisional value calculating step (S2-5) of calculating the composite output when charging 10 most as temporary composite output Xi
If there is a portion where the short-period variation ΔX in the calculated provisional composite output Xi exceeds a predetermined range with reference to the actual composite output Xr immediately before the current calculation time, the predetermined range is satisfied. Correction step for correcting the provisional composite output Xi (S2-6)
Re-correction step (S2-7) of re-correcting the correction value corrected in the charging temporary value correction step so that the short-cycle change amount ΔX satisfies a predetermined range.
The re-correction value corrected in the re-correction step is compared with the expected remaining capacity of the storage battery 10, and if there is a time when the expected remaining capacity falls below a predetermined range, the estimated remaining capacity may satisfy the predetermined range. Correction step (S2-8) for correcting the correction value again
In the above program, the target calculation step is formed by the provisional charge value correction step S2-6, the re-correction step S2-7, and the remaining correction step S2-8. In the target value calculation step, the value corrected in the residual correction step S2-8 finally corresponds to the target value Xt of the combined output.

In this case, the provisional value calculation unit 21 in the storage battery system 1 of the first embodiment is configured to calculate the combined output (provisional charge value) when the battery is charged most. The target value calculation unit 22 corrects the provisional charge value D6 to correct the provisional charge value as described above, the re-correction unit D7 to correct the provisional charge value again as described above, and corrects the re-correction value as described above. The remaining correction unit D8 is provided.
((Specific example of setting procedure for each pattern))
Hereinafter, a procedure for setting the target value Xt of the composite output described above will be specifically described with reference to FIGS. Exemplary conditions are shown below. The graphs of FIGS. 14 to 22 are schematically shown for convenience of explanation. In each graph, the horizontal axis represents time, and the vertical axis represents output (expected power generation amount, combined output).
(Example conditions)
Range of short-cycle variation ΔX = 1% / min or less of rated output Rg of generator 420 [Specified time zone of [1] = 3 hours, adjustment time zone = 100 minutes, setting section = 6 hours 20 minutes [2] Setting section = 2 hours [1] When a specified time zone is provided [1-A] When a reduction prohibition time zone is provided In FIGS. 14 to 16, in the specified time zone (A), the processing contents are easily understood. The case where the predicted power generation amount Pe is a graph that is convex upward is illustrated, but the target value Xt of the combined output can be set in the same manner when the graph that is the graph that is convex downward.
(1) Discharge priority value Xd (see FIG. 14)
(Reference value calculation step SA-1)
As shown in the upper left diagram of FIG. 14, the time is outside the designated time zone (A) and is adjusted from the end time te of the designated time zone (A) to the adjustment time zone (here, the time (te + 100) 100 minutes after the end time te. (In the time zone up to the minute), a straight line passing through the expected power generation amount Pe at each time and having a slope of 1% / minute of the rated output Rg (a straight line indicated by a dashed line in the upper left diagram of FIG. 14, a function of time and output) Take). A point on each straight line is a point where the amount of change per unit time of the expected power generation amount Pe at each time after the end time te satisfies 1% / min of the rated output Rg. Among the values of the end time te in each straight line, the minimum value is set as the calculated value P based on the expected power generation amount Pe at the end time te. This calculated value P is a value that becomes zero until the time (te + 100 minutes) when the amount of power generation decreases from the end time te toward the time (te + 100 minutes) at a rate of 1% / minute of the rated output Rg. Yes, it corresponds to the minimum value of the power generation amount so that the change amount of the combined output at the end time te satisfies 1% / min or less of the rated output Rg.

As shown in the middle diagram in the upper part of FIG. 14, the rated output Rb of the storage battery 10 is combined with the calculated value P (P + Rb), and a provisional combined output (reference value Xe) at the end time te is calculated.
(Tentative value extraction step SA-2)
As shown in the upper middle diagram of FIG. 14, from the end time te toward the start time ts side of the designated time zone (A) (see black arrows), the expected power generation amount Pe at each time in the generator 420 and the storage battery 10 The value (Pe + Rb) obtained by combining the rated output Rb and the reference value Xe is compared, and the smaller value is extracted as the temporary combined output Xi. By setting the combined value as the sum (Pe + Rb) of the expected power generation amount Pe and the rated output Rb of the storage battery 10, the storage battery 10 takes a value that can be discharged at the rated output Rb (a specified time zone (B ) And (C)). In the upper middle diagram of FIG. 14, the provisional composite output Xi is indicated by a broken line (a horizontal straight line passing through the reference value Xe and a diagonal line passing through the composite output Xs).
(Tentative value correction step SA-3)
As shown in the upper right part of FIG. 14, if there is a portion where the variation ΔX exceeds 1% / min of the rated output Rg and a portion where the provisional composite output Xi decreases in the extracted provisional composite output Xi. , The temporary composite output Xi is corrected so as to satisfy 1% / min of the rated output Rg and not decrease. In the upper right diagram of FIG. 14, a straight line (a portion exceeding the change amount of 1% / min) in the vicinity of the start time ts of the designated time zone (A) is changed by 1% / min of the rated output Rg. Is modified to a straight line (dot-dash line) that satisfies. In this case, the correction is made from the start time ts toward the end time te (see black arrows). In the lower left diagram of FIG. 14, the corrected values are indicated by thick solid lines.
(Discharge provisional value calculation step SA-4)
As shown in the lower left diagram of FIG. 14, for the adjustment time zone before the start time ts of the designated time zone (A), the synthesis when the storage battery 10 is discharged most based on the temporary synthesized output Xs at the start time ts. Calculate the output. Specifically, from the start time ts toward the start time side of the adjustment time zone (see the black arrow), the composite value Y1 of the provisional composite output Xs at the start time ts and the following change amount, and the prediction at the time t1 The combined value Q1 = (Pe1 + Rb) of the power generation amount Pe1 and the rated output Rb of the storage battery 10 is compared, and the smaller one (here, Q1) is extracted. The above change amount is a total amount when the change is made from time ts to time t1 at a rate of 1% / minute of the rated output Rg. For example, if the difference between the time ts and the time t1 is one minute, the above change amount is 1% of the rated output Rg. .., Yn and the combined values Q2,..., Qn of the expected power generation amount Pe and the rated output Rb at each time t2,. By comparison, the smaller one (here, Q2,..., Qn) is extracted.

The target value Xt of the combined output in the adjustment time zone after the designated time zone (A) is set in the same manner as the target value Xt of the combined output in the adjustment time zone before the designated time zone (A). In this case, the above-mentioned “temporary composite output at end time te (reference value Xe)” is used as a reference instead of the above “temporary composite output Xs at start time ts”. The same applies to the charging priority values Xc, [1-B], and [1-C] described later. In the lower left diagram of FIG. 14, the target value Xt of the combined output in the adjustment time zone after the end time te is indicated by a thick solid line.
(Discharge temporary value correction step SA-5)
In the provisional composite output Xi including the calculated provisional discharge value, if there is a portion where the variation exceeds 1% of the rated output Rg, the specified time from the adjustment time zone is adjusted so as to satisfy 1% or less of the rated output Rg. The provisional composite output Xi is corrected toward the band (A). In FIG. 14, only the confirmation is performed because there is no portion where the amount of change exceeds 1% of the rated output Rg.

Through the above steps, the discharge priority value Xd can be set as the target value Xt of the combined output in the designated time zone (A). Further, the target value Xt of the combined output in the adjustment time zone before and after the designated time zone (A) can be set.
(2) Charge priority value Xc (see FIG. 15)
(Tentative value calculation step SA-6)
As shown in the upper left diagram of FIG. 15, a temporary combined output Xi (Pe−Rb) obtained by combining the expected power generation amount Pe at each time in the generator 420 and the rated output Rb of the storage battery in the designated time zone (A). Calculate. By setting the tentative combined output Xi to the difference (Pe−Rb) between the expected power generation amount Pe and the rated output Rb of the storage battery 10, the storage battery 10 takes a value that can be charged at the rated output Rb (designation described later). The same applies to time zones (B) and (C)). In the upper left diagram of FIG. 15, the tentative combined output Xi is indicated by a broken line (a straight line parallel to a straight line depicting the expected power generation amount Pe in the designated time zone (A)).
(Tentative value correction step SA-7)
As shown in the upper middle diagram of FIG. 15, if there is a portion where the calculated change amount ΔX of the provisional composite output Xi exceeds 1% / min of the rated output Rg and a portion where the provisional composite output Xi decreases, the rated The provisional synthesized output Xi is corrected so as to satisfy 1% / min of the output Rg and not decrease. In the upper middle diagram of FIG. 15, the straight line (two-dot chain line) near the start time ts of the designated time zone (A) is corrected to a straight line (single-dot chain line) satisfying the variation of 1% / min of the rated output Rg. A case is shown in which the right-downward straight line (two-dot chain line) near the end time te is raised and corrected to a horizontal straight line (broken line) at subsequent times. Here, the end time te is used as a calculation start point, and toward the start time ts side, a process of correcting the above-mentioned straight line satisfying the change amount of 1% / min of the rated output Rg (see a black arrow pointing left), the start time ts Is performed toward the end time te side with the calculation start point as the calculation start point (see the black arrow pointing right). Further, in this example, the discharge priority value Xd (indicated by a thick dotted line in the upper right diagram in FIG. 15) is set first, and the portion exceeding the discharge priority value Xd in the temporary composite output Xi (in the upper right diagram in FIG. 15). (Indicated by a two-dot chain line) is modified to satisfy the discharge priority value Xd. Therefore, in this case, all the temporary composite outputs Xi are changed to the discharge priority value Xd. In the lower left diagram of FIG. 15, the corrected values are indicated by thick dotted lines.
(Charge provisional value calculation step SA-8)
As shown in the lower left diagram of FIG. 15, in the adjustment time zone before the start time ts of the designated time zone (A), the synthesis when the storage battery 10 is charged most based on the temporary synthesized output Xs at the start time ts. Calculate the output. The procedure is the same as the above-described provisional discharge value calculation step SA-4. In brief, from the start time ts toward the start time of the adjustment time zone (see the black arrow), the tentative composite output Xs at the start time ts and the above-mentioned change amount (positive and negative signs are appropriately changed) are shown. The composite value y1 is compared with a composite value S1 = (Pe−Rb) of the expected power generation amount Pe at time t1 and the rated output Rb of the storage battery 10, and the larger one (here, y1) is extracted. The composite value y1 is a composite value at the time t1 when it changes from the provisional composite output Xs at a rate of 1% / min of the rated output Rg. Thereafter, the composite value y2,... Is compared with the composite value S2,.
(Charge provisional value correction step SA-9)
In the provisional composite output Xi including the calculated provisional charging value, if there is a portion whose variation exceeds 1% of the rated output Rg, the specified time from the adjustment time zone is adjusted so as to satisfy 1% or less of the rated output Rg. The provisional composite output Xi is corrected toward the band (A). In FIG. 15, only the confirmation is performed because there is no portion where the amount of change exceeds 1% of the rated output Rg.

Through the above steps, the charging priority value Xc can be set as the target value Xt of the combined output in the designated time zone (A). Further, the target value Xt of the combined output in the adjustment time zone before and after the designated time zone (A) can be set. In the lower left diagram of FIG. 15, the target value Xt of the combined output in the adjustment time zone after the end time te is indicated by a thick dotted line.
(3) Intermediate value Xm (see FIG. 16)
(Intermediate value calculation step SA-10)
As shown in the left diagram of FIG. 16, an intermediate value Xm (thick dashed line) obtained by synthesizing the discharge priority value Xd (thick solid line) and the charge priority value Xc (thick dotted line) is calculated as a temporary synthesized output Xi. The intermediate value Xm is, for example, a value obtained by adding the discharge priority value Xd and the charge priority value Xc to 50% of the total value.
(Unspecified correction step SA-11)
As shown in the left diagram of FIG. 16, the temporary composite output Xi including the composite output in the adjustment time zone before the start time ts of the designated time zone (A) changes based on the actual composite output Xr before the start time. If there is a portion where the amount ΔX exceeds 1% of the rated output Rg, the temporary composite output Xi (intermediate value Xm) is corrected so as to satisfy 1% of the rated output Rg. Specifically, an actual composite output Xr (actual value) exists at a time tr before the start time of the adjustment time zone. A straight line (dashed-dotted line) that satisfies the amount of change of 1% of the rated output Rg is taken based on the actual value. In this example, there is a portion where both the discharge priority value Xd and the charge priority value Xc in the adjustment time period exceed a straight line (dot-dash line) satisfying the amount of change of 1% of the rated output Rg. The excess portion corresponds to a portion to the left of the straight line indicated by the dashed line rising to the right in the discharge priority value Xd, and corresponds to a portion to the left of the straight line indicated by the dashed line in the charging priority value Xc. As shown in the right diagram of FIG. 16, this excess portion is corrected to a straight line (a thick solid line for the discharge priority value Xd and a thick dotted line for the charge priority value Xc) that satisfies the variation of 1% of the rated output Rg.

Through the above steps, the intermediate value Xm can be set as the target value Xt of the combined output in the designated time zone (A). Further, the target value Xt of the combined output in the adjustment time zone before and after the designated time zone (A) can be set. In FIG. 16, the target value Xt in the designated time zone (A) and the adjustment time zone after the end time te of the designated time zone (A) is seen as one straight line because the three values Xd, Xc, and Xm overlap. ing.
[1-B] Case of Providing Time Zone of Prohibition of Increase FIGS. 17 and 18 illustrate a case where the predicted power generation amount Pe in the designated time zone (B) is a downwardly convex graph so that the processing contents can be easily understood. However, the target value Xt of the composite output can be set in the same manner in the case where the graph is convex upward.
(1) Discharge priority value Xd (see FIG. 17)
(Tentative value calculation step SB-1)
In the same manner as in the above “reference value calculation step SA-1”, the calculation value P shown in the upper left diagram of FIG. 17 is obtained. As shown in the upper middle diagram of FIG. 17, the calculated output P is combined with the rated output Rb of the storage battery 10 to calculate a temporary combined output (P + Rb) at the end time te. From the combined value (P + Rb) toward the start time ts side of the designated time zone (B) (see the black arrow), the estimated power generation amount Pe at each time in the generator 420 and the rated output Rb of the storage battery 10 are combined. Is calculated as Xi (Pe + Rb). In the upper middle diagram of FIG. 17, the tentative synthesized output Xi is indicated by a broken line (in the designated time zone (B), parallel to a straight line depicting the expected power generation amount Pe at the end time te and near the end time te, and at other times, at the right end). (Straight line). In the vicinity of the end time te, adjustment is made so as to satisfy the composite value (P + Rb) at the end time te (see the broken line near the end time te).
(Tentative value correction step SB-2)
In the same manner as in the above “temporary value correction step SA-3”, as shown in the upper right part of FIG. 17, in the calculated temporary composite output Xi, the change amount ΔX is 1% / min of the rated output Rg. If there is a portion that exceeds and a portion where the provisional composite output Xi increases, the provisional composite output Xi is corrected so as to satisfy 1% / min of the rated output Rg and not increase. In the upper right part of FIG. 17, the straight line (two-dot chain line) near the start time ts of the designated time zone (B) is corrected to a straight line (single-dot chain line) satisfying the variation of 1% / min of the rated output Rg. A case is shown in which a convex straight line (two-dot chain line, corresponding to an increasing part) is lowered above the end time te and thereafter corrected to a horizontal straight line (broken line). In the lower left diagram of FIG. 17, the corrected values are indicated by thick solid lines.
(Discharge provisional value calculation step SB-3)
In the same manner as the above-mentioned “discharge provisional value calculation step SA-4”, the storage battery 10 is stored in the adjustment time zone before the start time ts of the designated time zone (B) with reference to the temporary composite output Xs at the start time ts. The combined output at the time of the most discharge is calculated. Briefly describing the procedure, from the start time ts toward the start time of the adjustment time zone (see the black arrow), the tentative synthesized output Xs at the start time ts and the above-mentioned amount of change (positive and negative signs are appropriately changed) Is compared with a composite value T1 = (Pe + Rb) of the expected power generation amount Pe at time t1 and the rated output Rb of the storage battery 10, and the smaller one (here, Y1) is extracted. Thereafter, the composite value Y2,... Is compared with the composite value T2,.
(Discharge temporary value correction step SB-4)
In the provisional composite output Xi including the calculated provisional discharge value, if there is a portion where the variation exceeds 1% of the rated output Rg, the specified time from the adjustment time zone is adjusted so as to satisfy 1% or less of the rated output Rg. The provisional composite output Xi is corrected toward the band (B). In FIG. 17, only the confirmation is performed because there is no portion where the amount of change exceeds 1% of the rated output Rg.

Through the above steps, the discharge priority value Xd can be set as the target value Xt of the combined output in the designated time zone (B). In addition, the target value Xt of the combined output in the adjustment time zone before and after the designated time zone (B) can be set. In the lower left diagram of FIG. 17, the target value Xt of the combined output in the adjustment time zone after the end time te is indicated by a thick solid line.
(2) Charge priority value Xc (see FIG. 18)
(Tentative value calculation step SB-5)
In the same manner as the above-mentioned “temporary value calculation step SA-6”, as shown in the upper left diagram of FIG. 18, a temporary synthesized output Xi (Pe−Rb) in the designated time zone (B) is calculated (two points). See dashed line). Next, if there is a portion where the value of the tentative synthesized output Xi decreases in the middle from the end time te to the start time ts of the designated time zone (B), the value is corrected so as to be constant instead of decreasing. I do. In the example shown in FIG. 18, assuming that the value calculated and corrected in this way is a temporary composite output Xi in the designated time zone (B), the time required for the amount of discharge or charge exceeding the rated output Rb of the storage battery 10 is required. Can occur. In the example illustrated in FIG. 18, the difference between the expected power generation amount at or near the end time te and the expected power generation amount at an intermediate time is large, and is twice or more the rated output Rb of the storage battery 10. Therefore, even if the provisional composite output Xi is extracted as described above, the storage battery 10 cannot continue discharging at the rated output Rb. Therefore, if necessary, adjustment is made with (Pe + Rb) as the upper limit. In the upper left diagram of FIG. 18, the tentative synthesized output Xi is indicated by a broken line (in the designated time zone (B), a straight line parallel to the straight line describing the expected power generation amount Pe at and near the start time ts, and at the end time te and near the start time ts. A horizontal straight line, and at other times, a horizontal straight line and an oblique line rising to the right.
(Tentative value correction step SB-6)
In the same manner as in the above-mentioned "temporary value correction step SA-7", as shown in the middle part of the upper part of FIG. 18, a portion where the calculated change amount .DELTA.X of the provisional composite output Xi exceeds 1% / min of the rated output Rg. If there is a portion where the provisional composite output Xi increases, the provisional composite output Xi is corrected so as to satisfy 1% / min of the rated output Rg and not increase. In the upper middle diagram of FIG. 18, the straight line (two-dot chain line) near the start time ts of the designated time zone (B) is corrected to a straight line (single-dot chain line) satisfying the variation of 1% / min of the rated output Rg. A case is shown in which the straight line (two-dot chain line) near the end time te is corrected to a horizontal straight line (broken line) from the start time ts toward the end time te. Further, in this example, the discharge priority value Xd (shown by a bold dotted line in the upper right diagram of FIG. 18) is set first, and the portion exceeding the discharge priority value Xd in the provisional composite output Xi (the upper right diagram in FIG. 18). (Indicated by a two-dot chain line) is modified to satisfy the discharge priority value Xd. In the upper right diagram and the lower left diagram in FIG. 18, the corrected values are indicated by thick dotted lines.
(Charge provisional value calculation step SB-7)
In the same manner as the above-mentioned “provisional charge value calculating step SA-8”, the temporary composite output Xs at the start time ts is used as a reference for a predetermined time zone (adjustment time zone) before the start time of the designated time zone (B). To calculate the combined output when the storage battery 10 is charged most. To summarize the procedure, from the start time ts toward the start time of the adjustment time zone (see the black arrow), the composite value y1 of the provisional composite output Xs at the start time ts and the above-described variation is expressed as y1 = (Xs− ΔX) is compared with a composite value U1 = (Pe−Rb) of the expected power generation amount Pe at time t1 and the rated output Rb of the storage battery 10, and the larger one (here, U1) is extracted. Thereafter, the composite value y2,... Is compared with the composite value U2,. If the compared and extracted value exceeds the combined value (Pe + Rb) of the expected power generation amount Pe and the rated output Rb, the value is replaced with this combined value (Pe + Rb).
(Charge provisional value correction step SB-8)
In the provisional composite output Xi including the calculated provisional charge value, if there is a portion where the change amount exceeds 1% of the rated output Rg, the time from the adjustment time period is adjusted so as to satisfy 1% or less of the rated output Rg. The provisional composite output Xi is corrected toward the band (B). In the lower left diagram of FIG. 18, the temporary synthesized output Xi in the vicinity of the times t1 and t2 exceeds the straight line of the fluctuation amount of 1% of the rated output Rg, and is corrected to satisfy 1% or less of the rated output Rg ( Dashed line).

Through the above steps, the charging priority value Xc can be set as the target value Xt of the combined output in the designated time zone (B). In addition, the target value Xt of the combined output in the adjustment time zone before and after the designated time zone (B) can be set. In the lower left diagram of FIG. 18, the target value Xt of the combined output in the adjustment time zone after the end time te is indicated by a thick dotted line.
(3) Intermediate value Xm
The intermediate value Xm is the same as [1-A] (3), and a detailed description is omitted.
[1-C] Case of Providing Time Zones of Prohibition of Increase / Decrease In FIGS. 19 and 20, the predicted power generation amount Pe in the designated time zone (C) is a graph that is upwardly convex to facilitate understanding of the processing contents (here, The same is true of the graph of the designated time zone (A)), but the target value Xt of the composite output can be set in the same manner in the case of a downwardly convex graph.
(1) Discharge priority value Xd (see FIG. 19)
(Minimum value calculation step SC-1)
In the same manner as in the above “reference value calculation step SA-1”, a calculation value P shown in FIG. 19 is obtained. The minimum value Pmin of the predicted power generation amount Pe at each time in the designated time zone (C) including the calculated value P is extracted.
(Constant value calculation step SC-2)
A fixed value (Pmin + Rb) obtained by combining the calculated minimum value Pmin with the rated output Rb of the storage battery 10 is calculated as a temporary synthesized output Xi. In FIG. 19, the provisional composite output Xi is indicated by a thick solid line.
(Discharge provisional value calculation step SC-3)
In the same manner as the above-mentioned “discharge provisional value calculation step SA-4”, the storage battery 10 is stored in the adjustment time zone before the start time ts of the designated time zone (C) with reference to the temporary composite output Xs at the start time ts. The combined output at the time of the most discharge is calculated.
(Discharge temporary value correction step SC-4)
In the provisional composite output Xi including the calculated provisional discharge value, if there is a portion where the variation exceeds 1% of the rated output Rg, the specified time from the adjustment time zone is adjusted so as to satisfy 1% or less of the rated output Rg. The provisional composite output Xi is corrected toward the band (C). In FIG. 19, only the confirmation is performed because there is no portion where the amount of change exceeds 1% of the rated output Rg.

Through the above steps, the discharge priority value Xd can be set as the target value Xt of the combined output in the designated time zone (C). Further, the target value Xt of the combined output in the adjustment time zone before and after the designated time zone (C) can be set. In FIG. 19, the target value Xt of the combined output in the adjustment time period after the end time te is indicated by a thick solid line.
(2) Charge priority value Xc (see FIG. 20)
(Maximum value calculation step SC-5)
In the same manner as in the above “reference value calculation step SA-1”, a calculation value P shown in FIG. 20 is obtained. The maximum value Pmax of the predicted power generation amount Pe at each time in the specified time zone (C) including the calculated value P is extracted.
(Constant value calculation step SC-6)
A fixed value (Pmin-Rb) obtained by combining the calculated maximum value Pmax with the rated output Rb of the storage battery 10 is calculated as a temporary synthesized output Xi. In FIG. 20, the provisional composite output Xi is indicated by a broken line (a horizontal straight line passing through a point lower than the maximum value Pmax by the rated output Rb). In this example, a case is shown in which the discharge priority value Xd is set first, and the portion exceeding the discharge priority value Xd in the temporary composite output Xi is corrected so as to satisfy the discharge priority value Xd. Since the above-mentioned straight line indicated by the broken line taken as the tentative composite output Xi exceeds the discharge priority value Xd (see the thick solid line in FIG. 19), it is changed to the discharge priority value Xd. In FIG. 20, the value after correction is indicated by a thick dotted line.
(Charge provisional value calculation step SC-7)
In the same manner as the above-mentioned “provisional charge value calculation step SA-8”, the storage battery 10 is stored in the adjustment time zone before the start time ts of the designated time zone (C) with reference to the temporary composite output Xs at the start time ts. The combined output at the time of the most charge is calculated.
(Charge provisional value correction step SC-8)
In the provisional composite output Xi including the calculated provisional charging value, if there is a portion whose variation exceeds 1% of the rated output Rg, the specified time from the adjustment time zone is adjusted so as to satisfy 1% or less of the rated output Rg. The provisional composite output Xi is corrected toward the band (C). In FIG. 20, only the confirmation is performed because there is no portion where the amount of change exceeds 1% of the rated output Rg.

Through the above steps, the charging priority value Xc can be set as the target value Xt of the combined output in the designated time zone (C). Further, the target value Xt of the combined output in the adjustment time zone before and after the designated time zone (C) can be set. In FIG. 20, the target value Xt of the combined output in the adjustment time period after the end time te is indicated by a thick dotted line.
(3) Intermediate value Xm
The intermediate value Xm is the same as [1-A] (3), and a detailed description is omitted.
[2] Case of Non-Specified Time Zone In FIGS. 21 and 22, the expected power generation amount Pe for which the processing content is easy to understand is illustrated, but in other cases, the target value Xt of the combined output is set in the same manner. can do.
(D-1) Measures for rapid decrease (see Fig. 21)
(Tentative value calculation step S2-1)
A desired setting section (D) is set from the non-designated time zone, and the storage battery is calculated using the expected power generation amount Pe of the generator 420 and the rated output Rb of the storage battery 10 at each time of the setting section (D). Then, the composite output at the time when 10 is discharged most is calculated as a temporary composite output Xi. The basic procedure is similar to “discharge provisional value calculation step SA-4”. In brief, a combined value of the expected power generation amount Pe at each time and the rated output Rb (here, (Pe + Rb)) and a combined value of the expected power generation amount Pe at each time and the following variation Δx (here, ( Pe + Δx)), and the smaller one is extracted as a temporary composite output Xi. The above-mentioned change amount Δx is a total amount when the change is made for a predetermined time set as appropriate at a rate of 1% / min of the rated output Rg (for example, a total amount when the change is made for 10 minutes). In the left diagram of FIG. 21, the tentative combined output Xi is indicated by a broken line (in this case, a straight line parallel to a straight line depicting the expected power generation amount Pe in the set section (D)). In the provisional value calculation step S2-1, when the reference combined value (Pe + Rb) is extracted, the provisional combined output Xi is within the range of the predetermined change amount Δx even if the expected power generation amount Pe is sharply reduced, and The storage battery 10 can respond with an output (here, discharge) equal to or lower than the rated output Rb. In this case, since step S2-1 can be said to also serve as a rapid reduction measure, the following steps S2-2 to S2-4 can be omitted.
(Discharge temporary value correction step S2-2)
If the calculated tentative combined output Xi has a portion exceeding 1% / min of the rated output Rg based on the actual combined output Xr before the start time of the non-designated time zone (here, the set section (D)). , The temporary composite output Xi is corrected so as to satisfy 1% / min of the rated output Rg. The basic procedure is similar to the “unspecified correction step SA-11”. In brief, in the temporary composite output Xi (the left convex graph shown by a broken line in the left diagram of FIG. 21) obtained in step S2-1, the rated output is based on the actual composite output Xr (actual value). A straight line (dot-dash line) that satisfies the 1% change in Rg is taken. Here, when a straight line that satisfies the variation of 1% of the rated output Rg based on the actual combined output Xr at a certain time tr is taken, the provisional combined output Yk at the time tk is obtained by calculating the value yk on this straight line. Over. Therefore, the temporary synthesized output Xi at the time tk is corrected to a value yk, and a straight line (see the thick solid line in the right diagram of FIG. 21) that satisfies the change of 1% of the rated output Rg based on the value yk. I do.
(Recorrection Step S2-3)
In the correction value corrected in the temporary discharge value correction step, the change ΔX is re-corrected so as to satisfy 1% of the rated output Rg as shown in the left diagram of FIG. In the left diagram of FIG. 21, the combined output after re-correction is indicated by a thick solid line.
(Remaining correction step S2-4)
The re-correction value corrected in the re-correction step is compared with the expected remaining capacity of the storage battery 10, and if there is a time when the expected remaining capacity falls below a predetermined range, the estimated remaining capacity may satisfy the predetermined range. (Not shown).

Through the above steps, it is possible to set a value in consideration of a sudden decrease as the target value Xt of the combined output in the non-designated time zone.
(D-2) Sudden increase measures (see Fig. 22)
(Tentative value calculation step S2-5)
A desired setting section (D) is set from the non-designated time zone, and the storage battery 10 is set based on the expected power generation amount Pe of the generator 420 and the rated output of the storage battery 10 at each time of the setting section (D). The combined output at the time of the maximum charge is calculated as a temporary combined output Xi. The basic procedure is similar to the “provisional charge value calculation step SA-8”. In brief, a combined value (here, (Pe−Rb)) of the expected power generation amount Pe and the rated output Rb at each time, and a combined value of the expected power generation amount Pe at each time and the above-described variation Δx (here, Then, (Pe−Δx)) is compared, and the larger one is extracted as a temporary composite output Xi. In the left diagram of FIG. 22, the provisional synthesized output Xi is indicated by a two-dot chain line. If there is a possibility that the extracted temporary combined output Xi requires a discharge amount or a charge amount that exceeds the rated output Rb of the storage battery 10, the adjustment is performed with (Pe + Rb) as the lower limit. If there is a portion where the short-cycle variation ΔX exceeds 1% / min of the rated output Rg, the correction is made so as to satisfy 1% / min of the rated output Rg. In the left diagram of FIG. 22, the corrected tentative synthesized output Xi is indicated by a broken line (a substantially horizontal straight line at the start time of the setting section (D) and its vicinity, and an oblique line rising to the right at the end time). In the provisional value calculation step S2-5, when the reference combined value (Pe−Rb) is extracted, the provisional combined output Xi is within the range of the predetermined change amount Δx even if the expected power generation amount Pe suddenly increases. In addition, the storage battery 10 can respond with an output (here, charging) equal to or less than the rated output Rb. In this case, since it can be said that step S2-5 also serves as a countermeasure against a rapid increase, the following steps S2-6 to S2-8 can be omitted.
(Charge temporary value correction step S2-6)
A portion where the calculated change amount ΔX of the provisional composite output Xi exceeds 1% / minute of the rated output Rg based on the actual composite output Xr before the start time of the non-designated time zone (here, the set section (D)). , The provisional composite output Xi is corrected so as to satisfy 1% / min of the rated output Rg. The basic procedure is the same as the above-mentioned "discharge temporary value correction step S2-2". In FIG. 22, when a straight line (dot-dash line) satisfying the amount of change of 1% of the rated output Rg is taken with reference to the actual combined output Xr (actual value), a portion exceeding this straight line is included in the temporary combined output Xi. There is no. That is, since there is no portion where the variation ΔX exceeds 1% of the rated output Rg, only the confirmation is performed. In the right diagram of FIG. 22, the corrected temporary composite output Xi is indicated by a thick solid line.
(Recorrection step S2-7)
It is re-corrected so that the variation ΔX of the corrected value corrected in the provisional charging value correction step satisfies 1% / min of the rated output Rg. As described above, in FIG. 22, only the confirmation is performed because there is no portion where the variation ΔX exceeds 1% of the rated output Rg.
(Remaining correction step S2-8)
The re-correction value corrected in the re-correction step is compared with the expected remaining capacity of the storage battery 10, and if there is a time when the expected remaining capacity falls below a predetermined range, the estimated remaining capacity may satisfy the predetermined range. (Not shown).

Through the above steps, it is possible to set a value in consideration of a sudden increase as the target value Xt of the combined output in the non-designated time zone.
(effect)
According to the operation method of the storage battery of the first embodiment, the storage battery system 1 of the first embodiment, the program of the first embodiment, and the wind farm of the first embodiment, the output of the generator A target value Xt of a combined output obtained by combining the (power generation amount) and the output (discharge amount or charge amount) of the storage battery is set. In addition, the target value Xt is set so that the short-cycle variation ΔX in the target value Xt of the combined output satisfies a predetermined range. As described above, since the target value Xt is set under specific conditions, even if the storage battery 10 has a small rated output Rb and a small capacity, it satisfies the requirement for limiting the amount of change in a short cycle and supplies power stably to the load 440. Can be performed. For example, the storage battery 10 having a rated output Rb of 50% or less of the rated output Rg of the generator 420, further having a rated output of 40% or less, having a rated output of 30% or less, and further having a rated output Rb of about 10% to 20% can be used. .

  By specifying the change direction of the short-cycle change amount ΔX in the designated time zone (predetermined time zone) and setting the target value Xt of the combined output as in this example, the short-cycle change amount and the long-cycle change amount Is satisfied, the power supply can be stably supplied to the load 440 by satisfying the restriction requirement. Further, if the target value Xt is set in consideration of immediately after the end time of the designated time zone (predetermined time zone) as in this example, if there is a limitation on the amount of change in the short cycle after this time zone, this time is set. Even if the amount of power generation changes abruptly immediately after the end time of the band, the limit request can be satisfied more reliably, and power can be stably supplied to the load 440. Furthermore, when the target value Xt is at least one of the discharge priority value Xd, the charge priority value Xc, and the intermediate value Xm as in the present example, the power generation of the generator 420 can be suppressed even when the small-capacity storage battery 10 is used. As a result, the loss due to power generation suppression can be reduced. Further, effects such as further stabilization of the supplied power and improvement of the utilization rate of the generated power can be expected.

  When an RF battery is provided as the storage battery 10 as in this example, (1) capacity adjustment is easy, (2) long life, (3) SOC can be monitored accurately, and the remaining capacity and the like can be grasped. (4) The battery output and the battery capacity can be independently designed, and the degree of freedom in design is high.

  The present invention is not limited to these examples, but is indicated by the appended claims, and is intended to include all modifications within the meaning and scope equivalent to the appended claims.

For example, at least one of the following changes can be made to the first embodiment.
(1) The generator 420 is changed to a solar power generator or the like. In this case, a solar power station including the solar power generator and the storage battery system 1 can be constructed.
(2) Change the storage battery 10 to a lithium ion battery or the like.

  DESCRIPTION OF SYMBOLS 1 Storage battery system, 2 control part, 20 calculation part, 21 provisional value calculation part, 22 target value calculation part, 23 target value selection part, 201 storage part, 202 input / output part, 203 judgment part, 204 command part, 205 timer part , A1 reference value calculation section, A2 provisional value extraction section, A3, A7, B2, B6 provisional value correction section, A4, B3, C3 discharge provisional value calculation section, A5, B4, C4, D2 discharge provisional value correction section, A8 , B7, C7 Charge temporary value calculation unit, A9, B8, C8, D6 Charge temporary value correction unit, A10, B9, C9 Intermediate value calculation unit, A11, B10, C10 Non-designated correction unit, C1 minimum value calculation unit, C2 , C6 constant value calculation section, C5 maximum value calculation section, D3, D7 re-correction section, D4, D8 residual correction section, 3 monitor, 4 direct input section, 10 storage battery, 10C battery cell, 11 diaphragm, 14 positive electrode, 15Negative electrode, 16 positive electrode tank, 17 negative electrode tank, 162, 164, 172, 174 piping, 160, 170 pump, 400 AC / DC converter, 410 substation equipment, 420 generator, 440 load.

Claims (7)

A method of operating a storage battery in which a storage battery is provided in addition to a generator using natural energy, and the storage battery is charged and discharged according to the amount of power generated by the generator,
The amount of change per unit time in the combined output obtained by combining the expected power generation amount at each time in the generator and the discharge amount or charge amount of the storage battery does not decrease or increase in the middle of the predetermined time zone, or A storage battery that sets a target value of the combined output at each time based on the expected power generation amount after the end time of the predetermined time zone so as not to increase or decrease on the way, and charges and discharges the storage battery based on the target value. Driving method.   As the target value in the predetermined time period, a discharge priority value at which the amount of discharge of the storage battery is maximized in a range in which the power generation suppression of the generator can be reduced, and a charge priority value at which the amount of charge of the storage battery becomes maximum in the range. The storage battery operation method according to claim 1, wherein at least one selected from a value and an intermediate value between the discharge priority value and the charge priority value is set. A storage battery system that is provided alongside a generator using natural energy and performs charging and discharging in accordance with the amount of power generated by the generator,
A provisional value calculation unit configured to calculate a provisional combined output obtained by combining a value based on the estimated power generation amount at each time in the generator and the rated output of the storage battery;
A storage battery system comprising: a control unit including a target value calculation unit that corrects the provisional composite output so that the amount of change per unit time satisfies a predetermined range, and calculates a target value of the composite output at each time. In order to charge and discharge a storage battery attached to the generator according to the amount of power generated by the generator using natural energy, a computer
A provisional value calculation step of calculating a provisional composite output obtained by combining a value based on the estimated power generation amount at each time in the generator and the rated output of the storage battery;
A target value calculating step of correcting the provisional composite output so that the amount of change per unit time satisfies a predetermined range, and calculating a target value of the composite output at each time. In the target value calculation step,
The program according to claim 4, wherein the tentative synthesized output is corrected so that a change amount of the synthesized output per unit time in a predetermined time zone does not decrease in the middle, does not increase in the middle, or does not increase or decrease in the middle. . In the temporary value calculation step,
The provisional combined output in the predetermined time zone is adjusted so that the amount of change per unit time of the expected power generation amount at each time outside the time zone and after the end time of the time zone satisfies the predetermined range. The program according to claim 5, wherein a value based on the expected power generation amount at the end time is calculated, and the value is calculated using the calculated value. In the target value calculation step,
As the target value in the predetermined time period, a discharge priority value at which the amount of discharge of the storage battery is maximized in a range in which the power generation suppression of the generator can be reduced, and a charge priority value at which the amount of charge of the storage battery becomes maximum in the range. The program according to claim 5, wherein at least one selected from a value and an intermediate value between the discharge priority value and the charge priority value is calculated.

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