JP2020167756A - Storage battery control system - Google Patents

Abstract

To provide a storage battery control system which can support a demand response request by effectively utilizing the remaining power storage amount of a storage battery.SOLUTION: A storage battery control system 1 includes: a data storage unit 11 which records a first reference power reception amount, which becomes a reference for determining the necessity of discharging a storage battery system 2 relative to an integrated power reception amount at each elapsed time from the start time of each DC period for each first unit time; a data communication unit 12 which performs data transmission/reception to/from the storage battery system 2; and a storage battery control unit 13 which transmits discharge command data toward the storage battery system 2 when determining, for each first unit time, that the integrated power reception amount is larger than the first reference power reception amount, based on the power reception amount data which indicates an integrated power reception amount from the start time to the elapsed time. A difference obtained by subtracting the first reference power reception amount from a target integrated power reception amount, which linearly increases from 0% to 100% of the target value from the start time of the DC period to the completion time, increases monotonically from the start time and becomes the maximum value of a positive value at an initial stage, and thereafter decreases monotonically.SELECTED DRAWING: Figure 1

Description

The present invention ensures that the integrated power received from the system power from the start of each DC period in the consumer who is the target of execution of Demand Cut (DC) does not exceed a predetermined target value within each DC period. The present invention relates to a storage battery control system that controls the discharge of electric power stored in a customer's storage battery system.

In order to curb the tight supply and demand of the commercial power system, the use of demand response is being considered to reduce the power supplied from the commercial power system (hereinafter referred to as "system power") by the power consumer upon request. .. In particular, in recent years, the use of ADR (Automated Demand Response), which realizes the automation of grid power reduction requests to consumers and the automation of grid power reduction control by consumers, has attracted attention, and this method is in demand. It can also be used to execute demand cuts that reduce the amount of power received by the house.

In the ADR, in the DR server that requests the control terminals of one or more consumers to reduce the grid power, any of the plurality of devices used by the consumers in order to achieve the target reduced electric energy. On the other hand, a DR plan for how much electric energy is to be reduced in which time zone is being formulated (see, for example, Patent Documents 1 to 3 below). On the other hand, the devices subject to demand response by consumers are roughly classified into power consumption devices, power storage devices, and power supply devices, and the power consumption devices are assumed to be air conditioning devices, lighting devices, computer devices, etc. As the electric power storage device, a storage battery or the like is assumed, and as the electric power supply device, a solar power generation device, a gas engine type or a fuel cell type cogeneration system (combined heat and power system) or the like is assumed. For example, Patent Document 4 below discloses an embodiment in which the discharge power from the storage battery is used in response to a demand response request.

Japanese Unexamined Patent Publication No. 2013-9565 Japanese Unexamined Patent Publication No. 2016-103974 JP-A-2017-701131 JP-A-2018-68076

However, when the storage battery system is used as the target device for the demand response, for example, in Patent Document 4, the discharge power required for the demand response request is calculated throughout the DR period to control the discharge of the storage battery. However, since the remaining storage capacity of the storage battery is limited, in order to effectively utilize this when demand is cut, the discharge control of the storage battery should be finely divided into shorter time units by subdividing the DC period. There is a need to do.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a storage battery control system capable of responding to demand cut by effectively utilizing the remaining storage capacity of the storage battery.

In order to achieve the above object, in the storage battery control system according to the present invention, in each of the DC periods, the integrated power received amount of the system power from the start time of each DC period by the consumer who is the target of executing the demand cut is the above. A storage battery control system that controls the discharge of electric power stored in the customer's storage battery system so as not to exceed a predetermined target value within each DC period.
Whether or not to discharge the storage battery system with respect to the integrated power received amount at each of the elapsed times from the start time of each DC period for each first unit time in which the length of the DC period is evenly subdivided. A data storage unit that records the first reference power received amount, which is the criterion for judgment,
A data communication unit that sends and receives data to and from the storage battery system,
Based on the power received amount data indicating the integrated power received amount from the start time to the elapsed time received at a predetermined reception timing via the data communication unit, the integrated power received amount and the integrated power received amount are described every first unit time. When the magnitude relationship with the first reference power reception amount is determined and it is determined that the integrated power reception amount is equal to or greater than or exceeds the first reference power reception amount, a discharge command is issued to the storage battery system via the data communication unit. It is equipped with a storage battery control unit that transmits data.
Within each of the DC periods, the first reference power receiving amount increases monotonically from the lower limit value to the upper limit value without decreasing in the middle as the elapsed time increases for each first unit time. Has been set and
When the integrated power reception amount linearly increasing from 0% to 100% of the target value with respect to the increase of the elapsed time from the start time to the end time of the DC period is defined as the target integrated power reception amount, the target The difference obtained by subtracting the first reference power received from the integrated power received increases monotonically during the first initial period from the start of each DC period to the elapse of a predetermined time, and is positive at the end of the first initial period. The first feature is that it becomes the maximum value and is set to monotonically decrease from the end of the first initial period until the first reference power receiving amount reaches the upper limit value.

According to the storage battery control system of the first feature, when the integrated power reception amount increases beyond the first reference power reception amount set in each elapsed time at each elapsed time for each first unit time of each DC period, Since the increase in the grid power supplied to the power load of the consumer is covered by the discharge power from the storage battery system until the next elapsed time, the integrated power reception amount greatly exceeds the first standard power reception amount. Since the increase is suppressed and the control is finely executed every first unit time, as a result, the integrated power received is the first reference power received from the start to the end of each DC period. Along with the transition, the amount of power received will increase without significantly deviating from the first standard power reception amount, and will be controlled so as not to exceed a predetermined target value within each DC period. As a result, when viewed through one DC period, the amount of power discharged from the storage battery system increases little by little according to the transition of the accumulated power received from the start time, so that an unnecessarily large amount of discharge is avoided. The remaining storage capacity of the storage battery can be effectively utilized.

Further, according to the storage battery control system of the first feature, the first reference power receiving amount is set to be smaller than the target integrated power receiving amount from the first half to the middle of the DC period, and the first one in each elapsed time. The line segment (trajectory) connecting the reference power receiving amount is convex downward as compared with the linear locus of the target integrated power receiving amount. As a result, the increase in the accumulated power received is suppressed from the first half to the middle of the DC period, and a larger margin to the target value is secured. Therefore, the integrated power received increased sharply from the middle to the second half of the DC period. Even in this case, it is possible to easily avoid the possibility that the integrated power received exceeds the target value due to the discharge power from the storage battery system.

Further, in the storage battery control system of the first feature, the data communication unit receives the storage battery data including the remaining storage capacity of the storage battery system together with the power received data at the predetermined reception timing, and controls the storage battery. Even when the unit determines that the integrated power reception amount is equal to or more than or exceeds the first reference power reception amount, if the residual storage capacity is less than or less than a predetermined lower limit set value, the discharge command is given. It is preferable not to send data. As a result, when the remaining storage capacity of the storage battery system is extremely small, it is possible to avoid unnecessary discharge commands to the storage battery system.

Further, in the storage battery control system of the first feature, the storage battery control unit determines the magnitude relationship between the integrated power reception amount and the first reference power reception amount for each first unit time, and then the discharge command. When the data is not transmitted, it is preferable to transmit the standby command data.

Further, in the storage battery control system of the first feature, the length of the first initial period is set to 10% or more and 30% or less of the length of the DC period, and at the end of the first initial period, It is preferable that the difference obtained by subtracting the first reference power receiving amount from the target integrated power receiving amount is set to 10% or less of the target value.

Further, in the storage battery control system of the first feature, it is preferable that the first reference power receiving amount maintains the upper limit value in the first end preparation period within a predetermined time immediately before the end time of the DC period. Further, the length of the first end preparation period is set to be equal to or greater than the first unit time, 10% of the length of the DC period, or three times the first unit time, whichever is greater. Is preferable. As a result, it is possible to prevent the storage battery system from being unnecessarily discharged even though the integrated power reception amount is extremely unlikely to exceed the target value immediately before the end of the DC period.

Further, in the storage battery control system of the first feature, the lower limit value is set to 0% or more and 5% or less of the target value, and the upper limit value is set to 95% or more and 99% or less of the target value. Is preferable.

Further, in the storage battery control system of the first feature, the data storage unit refers to the integrated power received amount at each of the elapsed times from the start time of each DC period for each first unit time. It records the second standard power reception amount, which is the standard for determining whether to allow charging of the storage battery system.
The storage battery control unit
Based on the data indicating the accumulated power received from the start time to the elapsed time, the magnitude relationship between the integrated power received and the second reference power received is determined for each first unit time.
When it is determined that the integrated power reception amount is less than the second reference power reception amount, charging permission data is transmitted to the storage battery system via the data communication unit.
Within each of the DC periods, the second reference power receiving amount increases monotonically from the lower limit value to the upper limit value without decreasing in the middle as the elapsed time increases for each first unit time. And, except for the start time and the end time of the DC period, at each of the elapsed times of the first unit time, the amount of power received is less than the first reference power receiving amount, and with the start time of the DC period. The second feature is that it is set so as to be equal to or less than the first reference power receiving amount at each of the end points.

According to the storage battery control system of the second feature described above, a second reference power reception amount that is less than the first reference power reception amount is set at each elapsed time, and only when the integrated power reception amount is less than the second reference power reception amount. Since the storage battery system can be charged, even if the integrated power reception amount is less than the first standard power reception amount, when it is equal to or more than the second standard power reception amount, that is, the integrated power reception amount is slightly less than the first standard power reception amount. When this is the case, it is possible to prevent the storage battery system from being charged and the integrated power reception amount from being unnecessarily increased.

Further, in the storage battery control system of the second feature, the second reference power receiving amount is set to 0% of the target value in the second initial period from the start time of each DC period to the elapse of a predetermined time. Is preferable. As a result, within the second initial period, the integrated power reception amount is always equal to or greater than the second reference power reception amount, and the charging permission data is not transmitted, so that charging of the storage battery system is prevented. If charging of the storage battery system is started within the second initial period at the beginning of each DC period, the integrated power received increases unnecessarily at the initial stage and rapidly increases from the middle to the latter half of the DC period. In some cases, the target value may be exceeded, but the above-mentioned preferred embodiment prevents the possibility.

Further, in the storage battery control system of the second feature, the data communication unit receives the storage battery data including the remaining storage capacity of the storage battery system together with the power received data at the predetermined reception timing, and controls the storage battery. Even when the integrated power receiving amount is determined to be less than the second reference power receiving amount, the unit does not transmit the charging permission data when the remaining storage capacity is equal to or more than or exceeds a predetermined upper limit set value. Is preferable. Thereby, for example, when the remaining storage capacity of the storage battery system is close to the fully charged state, an unnecessary charging command to the storage battery system can be avoided.

Further, in the storage battery control system of the second feature, the storage battery control unit determines the magnitude relationship between the integrated power reception amount and the second reference power reception amount for each first unit time, and then enables the charging. When the data is not transmitted, it is preferable to transmit the standby command data except when the discharge command data is transmitted.

Further, in the storage battery control system of the second feature, it is preferable that the length of the first initial period and the length of the second initial period are set to be the same. As a result, the difference between the first reference power reception amount after the first initial period and the second reference power reception amount after the second initial period is appropriately maintained, and the first reference power reception amount and the second initial power reception amount at each elapsed time are maintained. It becomes easy to set the second reference power receiving amount after the period.

Further, in order to achieve the above object, the program according to the present invention is characterized in that the computer functions as the storage battery control unit of the storage battery control system of the first or second feature. By the program of the above-mentioned feature, the storage battery control unit of the storage battery control system of the first or second feature can be made to function on a computer.

Further, in order to achieve the above object, the computer-readable recording medium according to the present invention records a program for causing the computer to function as the storage battery control unit of the storage battery control system of the first or second feature. It is characterized by doing. With the computer-readable recording medium of the above-mentioned feature, the storage battery control unit of the storage battery control system of the first or second feature can be made to function on the computer by using the program recorded on the recording medium.

According to the storage battery control system according to the present invention, the cumulative power received from the system power is effectively controlled so as not to exceed the target value while effectively utilizing the remaining storage capacity of the storage battery in each DC period.

A block diagram schematically showing a configuration example of a storage battery control system. The figure which shows typically an example of the relationship between the 1st reference power receiving amount and the 2nd reference power receiving amount, and the elapsed time from the start time of a DC period. The figure which shows typically the relationship between the difference which subtracted the 1st reference power receiving amount from the target integrated power receiving amount, and the elapsed time from the start time of a DC period. The figure which shows another example of the relationship between the 1st reference power receiving amount and the 2nd reference power receiving amount, and the elapsed time from the start time of a DC period schematically. The flowchart which shows the outline of an example of the processing procedure performed by a storage battery control unit.

Hereinafter, embodiments of the storage battery control system (hereinafter, appropriately abbreviated as “the present system”) according to the present invention will be described with reference to the drawings.

[Configuration example of this system]
In this system 1, in each of one or a plurality of DC periods, the grid power (power supplied from the commercial power system to the customer) from the start point of each DC period in the consumer who is the target of the demand cut is The charge / discharge of the electric power stored in the storage battery system of the consumer is controlled so that the integrated electric power reception amount does not exceed a predetermined target value within each DC period. More specifically, this system 1 receives power receiving information and storage battery information of (system power) from the storage battery system 2 of the consumer, and transmits various command data described later to the storage battery system 2. Controls the charging and discharging of the storage battery system 2. Here, in the demand cut contract, the integrated power reception amount PA of the grid power from the start point of each DC period does not exceed the target value PT uniformly or separately set in advance for each DC period (PA ≤ PT). ) Shall be requested. The target value PT (Wh) is given by PT = PK × TD / 60, where the length of the DC period is TD (minutes) and the target contract power is PK (W). Since the length TD of the DC period is set to 30 minutes as standard, it is also set to 30 minutes in this embodiment.

As shown in FIG. 1, the system 1 includes a data storage unit 11, a data communication unit 12, and a storage battery control unit 13, and as an embodiment, on a general-purpose computer (for example, a personal computer or the like). It is configured by installing application software (computer program) that executes each process in the data storage unit 11, the data communication unit 12, and the storage battery control unit 13.

The data storage unit 11 is, for example, a recording device capable of non-volatilely recording a large amount of data such as an HDD (hard disk drive) and an SSD (solid state disk) built in or externally attached to the computer constituting the system 1. It is configured so that data can be written, read, searched, etc. by external control. The data storage unit 11 records data necessary for arithmetic processing performed by the storage battery control unit 12. Specifically, the data storage unit 11 records the first reference power reception amount and the second reference power reception amount, which will be described later, in each of the elapsed times for each first unit time from the start time of each DC period.

The first unit time is a unit time obtained by evenly subdividing the length TD of the DC period. In the present embodiment, assuming that TD = 30 (minutes) and dividing it into 30 equal parts, the first unit time is 1 minute. Therefore, assuming that the number of elapsed times for each first unit time from the start time of each DC period is the ordinal number i, the elapsed time T (i) at the i-th elapsed number of times is T (i) = i (minutes). However, i = 1 to 30. The start time point of the DC period is the end time point (i = 30) of the previous DC period, and is treated as the 0th elapsed number (i = 0) for convenience.

The first unit time is not limited to 1 minute, and may be a value obtained by dividing the length TD of the DC period into, for example, 10 to 60 equal parts. However, if the first unit time is long, there is a high possibility that the accumulated power received PA will increase sharply during the elapse of one first unit time, so set it as short as possible with an upper limit of 2 to 3 minutes. Is preferable. If the first unit time becomes too short (for example, several seconds or less), a hunting phenomenon may occur in the control of the integrated power reception amount PA, which is not preferable.

The first reference power receiving amount is a reference value for determining whether or not to discharge the storage battery system 2 with respect to the integrated power receiving amount PA (i) at each elapsed time T (i), and is appropriately described below. , PR1 (i) is displayed. Further, the second reference power receiving amount is a reference value for determining whether or not to allow charging of the storage battery system 2 with respect to the integrated power receiving amount PA (i) at each elapsed time T (i), and will be described below. Then, it is appropriately displayed as PR2 (i).

The data communication unit 12 transmits and receives data based on a predetermined communication protocol in data transmission / reception between the I / O port of the computer constituting the system 1 and the I / O port provided in the storage battery system 2. It is configured with a device. In the present embodiment, a wired LAN is assumed as the data communication path 3 connecting the system 1 and the storage battery system 2, and Modbus / TCP, which is a serial communication protocol, is assumed to be used as the communication protocol. The data communication line is not limited to the wired LAN, and the communication protocol is not limited to Modbus / TCP.

The storage battery control unit 13 executes each process (discharging required or not) described later by executing the above application software on an arithmetic processing unit (for example, a CPU (Central Processing Unit)) of a computer constituting the system 1. It is configured to execute a determination process, a chargeability determination process, a control command process, etc.). The application software is stored in the data storage unit 11 as an example.

The storage battery system 2 includes, for example, a storage battery 21 for charging and discharging a lithium ion battery and the like, and a controller 22 such as a power conditioner. The storage battery system 2 is configured so that the controller 22 can execute charge / discharge control for the storage battery 21 in accordance with a control command from the system 1. Further, in the present embodiment, the storage battery system 2 is provided with a communication device 23 similar to the data communication unit 12, and is configured to be capable of transmitting and receiving data to and from the data communication unit 12 based on a predetermined communication protocol. Further, in the present embodiment, the controller 22 of the storage battery system 2 communicates with the power meter 4 for measuring the power value (W) of the system power supplied to the consumer, and obtains the power value measured by the power meter 4. The first unit time (in this embodiment, 1 minute as an example) is further increased by directing the consumer data D0 including the power received data D1 and the storage battery data D2 described later toward the system 1 via the communication device 23. It is configured so that it can be repeatedly transmitted every second unit time (in this embodiment, 1 second as an example) obtained by evenly subdividing.

[Setting of 1st standard power reception amount and 2nd standard power reception amount]
Next, how the first reference power receiving amount PR1 (i) and the second reference power receiving amount PR2 (i) stored in the data storage unit 11 are set for each elapsed time T (i). Will be described with reference to FIGS. 2 to 4.

2 and 4 are graphs schematically showing the relationship between the first reference power receiving amount PR1 (i) and the second reference power receiving amount PR2 (i) and the elapsed time T (i). FIG. 3 is a graph schematically showing the relationship between the difference ΔP1 (i) obtained by subtracting the first reference power reception amount PR1 (i) from the target cumulative power reception amount PAT (i) described later and the elapsed time T (i). ..

In FIGS. 2 and 4, the first reference power receiving amount PR1 (i) is shown by a thick broken line, the second reference power receiving amount PR2 (i) is shown by a thick solid line, and further, the target integrated power receiving amount PAT (i) is shown. ) Is indicated by a thin alternate long and short dash line. The target cumulative received power PAT (i) is 0% to 100 of the target value PT with respect to the increase from the start time (i = 0) to the end time (i = 30) of the DC period of the elapsed time T (i). It is defined as the integrated power received that increases linearly and monotonically up to%. The target cumulative power reception amount PAT (i) represents a model example of the cumulative power reception amount PA (i) when the elapsed time T (i) increases ideally, and the first reference power reception amount PR1 (i) It is used as a comparison target when explaining the characteristics of.

The first reference power receiving amount PR1 (i) increases monotonically from the lower limit value PR1L to the upper limit value PR1U as the elapsed time T (i) increases every first unit time (without decreasing in the middle). It is set to increase monotonically in a broad sense). That is, PR1 (i2) ≥ PR1 (i1) is established for the two elapsed times i1 and i2 (i2> i1). As an example, the lower limit value PR1L is preferably 0% or more and 5% or less of the target value PT, more preferably 1% or more and 3% or less, and is set to 2% in the present embodiment. Further, as an example, the upper limit value PR1U is preferably 95% or more and 99% or less of the target value PT, more preferably 97% or more and 99% or less, and is set to 98% in the present embodiment.

Further, as shown in FIG. 3, the difference ΔP1 (i) (= PAT (i) -PR1 (i)) obtained by subtracting the first reference power receiving amount PR1 (i) from the target integrated power receiving amount PAT (i) is each. It increases monotonically during the first initial period from the start of the DC period (i = 0) to the elapse of a predetermined time, reaches the maximum positive value at the end of the first initial period, and starts from the end of the first initial period. , The first reference power receiving amount PR1 (i) is set to decrease monotonically until it reaches the upper limit value PR1U. The monotonous increase of the difference ΔP1 (i) in the first initial period and the monotonous decrease after the first initial period do not necessarily have to be linear (the amount of change for each first unit time is constant).

As an example, the length TS1 of the first initial period is preferably 10% or more and 30% or less, more preferably 15% or more and 25% or less of the length TD of the DC period, and in the present embodiment, the length TD of the DC period. It is set to 1/6 (about 16.7%) of. Further, the difference ΔP1 (i) obtained by subtracting the first reference power receiving amount PR1 (i) from the target integrated power receiving amount PAT (i) at the end of the first initial period is preferably 10% or less of the target value PT, and is preferably 4%. More than 9% or less is more preferable, and in this embodiment, it is set to 1/15 (about 6.7%) of the target value PT.

As shown in FIGS. 2 to 4, the first reference power receiving amount PR1 (i) is set to be smaller than the target integrated power receiving amount PAT (i) from the first half to the middle of the DC period, and each elapsed time. The line segment connecting the first reference power receiving amount PR1 (i) in T (i) has a downwardly convex polygonal line as compared with one straight line (dashed line) of the target integrated power receiving amount PAT (i). Become.

As described above, the first reference power receiving amount PR1 (i) is set so as to form a downwardly convex polygonal line from the first half to the middle of the DC period, whereby the discharge necessity determination process described later (FIG. In step # 11) of step 5, it becomes easier to determine that PA (i)> PR1 (i) with respect to the increase in the integrated power reception amount PA (i), and in step # 15 (control command processing), the storage battery system 2 is subjected to. On the other hand, the control command data DC (corresponding to the discharge command data) instructing the discharge is easily transmitted. As a result, the increase in the integrated power received PA (i) is suppressed from the first half to the middle of the DC period, and a larger margin to the target value is secured. Therefore, the integrated power received PA (i) starts from the middle of the DC period. Even when the amount increases sharply in the latter half, it is possible to easily avoid the possibility that the integrated power received PA (i) exceeds the target value PT due to the discharge power from the storage battery system 2.

In the present embodiment, as shown in FIG. 2, the first reference power receiving amount PR1 (i) reaches the upper limit value PR1U before a predetermined time immediately before the end time (i = 30) of the DC period, and then the DC period. The upper limit value PR1U is set to be maintained within the first end preparation period up to the end point (i = 30) of. When the first end preparation period is provided, the length TE1 of the first end preparation period is 1 unit time or more, 10% of the length of the DC period TD, or 3 times the first unit time, whichever is greater. It is preferably less than or equal to the value, and in the present embodiment, it is set to the first unit time (1 minute, 1/30 (about 3.3%) of the length TD of the DC period).

As described above, in the setting of the first reference power receiving amount PR1 (i), the first end preparation period is provided, and the upper limit value PR1U is set to be less than the target value PT to provide a margin, so that the integrated power reception is performed immediately before the end of the DC period. When the amount PA (i) approaches and exceeds the target value PT, it is easy to determine that PA (i)> PR1 (i) in the discharge necessity determination process (step # 11 in FIG. 5) described later. Therefore, in step # 15 (control command processing), the control command data DC (corresponding to the discharge command data) instructing the storage battery system 2 to be discharged is easily transmitted. As a result, the integrated power reception amount PA (i) can be suppressed to the target value PT or less immediately before the end of the DC period.

As shown in FIG. 4, it is not always necessary to set the first end preparation period, and the first reference power receiving amount PR1 (i) is from the end time of the first initial period to the end time of the DC period (i = 30). ) May be set so as to monotonically increase without exceeding the target integrated received power PAT (i) and reach the upper limit value PR1U at the end of the DC period (i = 30).

As shown in FIGS. 2 and 4, the second reference power receiving amount PR2 (i) is on the way from the lower limit value PR2L to the upper limit value PR2U as the elapsed time T (i) increases every first unit time. It is set to increase monotonically without decreasing (monotonically increasing in a broad sense). That is, PR2 (i2) ≥ PR2 (i1) is established for the two elapsed times i1 and i2 (i2> i1). Further, the second reference power receiving amount PR2 (i) elapses every first unit time except at the start time (i = 0) and the end time (i = 30) of the DC period (that is, i = 1-29). At each time T (i), the first reference power received is less than PR1 (i), and at each of the start time (i = 0) and end time (i = 30) of the DC period, the first It is set so as to be equal to or less than the reference power receiving amount PR1 (i).

Therefore, the lower limit value PR2L of the second reference power receiving amount PR2 (i) is equal to or less than the lower limit value PR1L of the first reference power receiving amount PR1 (i), and is set to 0% of the target value PT in the present embodiment. .. Further, the upper limit value PR2U of the second reference power receiving amount PR2 (i) is equal to or less than the upper limit value PR1U of the first reference power receiving amount PR1 (i), and in the present embodiment, the upper limit of the first reference power receiving amount PR1 (i). It is set to the same value as the value PR1U.

Further, in the present embodiment, the second reference power receiving amount PR2 (i) is the target value PT which is the lower limit value PR2L in the second initial period from the start time (i = 0) of the DC period to the elapse of a predetermined time. It is set to 0%. As an example, the length TS2 of the second initial period is preferably 10% or more and 30% or less, more preferably 15% or more and 25% or less of the length TD of the DC period, and in the present embodiment, the length of the first initial period. It is set to be the same as TS1, that is, one sixth (about 16.7%) of the length TD of the DC period.

Difference between the first reference power receiving amount PR1 (i) and the second reference power receiving amount PR2 (i) excluding the start time point (i = 0) and the end time point (i = 30) of the DC period ΔPR (i) (= PR1 (i) ) -PR2 (i)) is preferably 3% or more of the target value PT, and when the second initial period is set, it becomes maximum at the end of the second initial period and becomes monotonous after the second initial period elapses. It is preferably set to decrease.

In the second initial period immediately after the start of the DC period, the cumulative power received PA (i) is set to PA (i) ≤ PR1 (i) in the discharge necessity determination process (step # 11 in FIG. 5) described later. If it is determined, PA (i) ≥ PR2 (i) is reliably determined in the chargeability determination process (step # 13 in FIG. 5), which will be described later. Therefore, in step # 15 (control command process), the storage battery system It is possible to reliably prevent the control command data DC (corresponding to the charging command data) that permits charging to 2 from being transmitted. As a result, in the second initial period immediately after the start of the DC period, the cumulative power received PA (i) due to the charging of the storage battery system 2 is unnecessarily increased, and the unnecessary discharge of the storage battery system 2 is prevented. Can be prevented.

By the way, as described above, the target value PT, which is the reference for setting the first reference power reception amount PR1 (i) and the second reference power reception amount PR2 (i), starts each DC period based on the target contract power PK. It is calculated in advance and stored in the data storage unit 11. The calculation of the target value PT and the storage in the data storage unit 11 may be automatically performed by the storage battery control unit 13 based on the target contract power PK input from the outside, or may be manually performed by the operator. Good. Further, as an example, the target contract power PK is received from an external DR server (for example, DRAS (Demand Response Automation Server)) based on a standard such as OpenADR via a data communication network such as the Internet. Is also a preferred embodiment. In this case, the system 1 includes, for example, a communication device that transmits / receives data to / from an external DR server via a predetermined data communication network such as the Internet.

[Processing content of storage battery control unit]
Next, the consumer data reception process, the integrated power reception amount calculation process, the discharge necessity determination process, the chargeability determination process, and the control command process performed by the storage battery control unit 13 will be described with reference to FIG.

FIG. 5 shows the elapsed number i-th elapsed time T (i-1) immediately after the processing at the elapsed number (i-1) th elapsed time T (i-1) repeated every first unit time from the start time of each DC period. It is a flowchart which shows the rough processing contents until the processing in i) is completed (i = 1-30). Therefore, in the present embodiment, the processing at the start time point (i = 0) of each DC period is executed as the processing at the end time point (i = 30) of the previous DC period, and the processing of each DC period is performed. , Is executed at the elapsed time T (i) (i = 1 to 30) from the start time (i = 0).

First, in step # 20, the storage battery system 2 performs a process (step # 201) of transmitting consumer data D0 including power received data D1 and storage battery data D2 to the system 1 with an elapsed time T (i-1). ) Is repeated every second unit time (1 second as an example in the present embodiment) described above (in the present embodiment, the repetition is within one first unit time (1 minute)). Performed 60 times). The alternate long and short dash arrow in step # 20 schematically illustrates the repeating loop. The received power data D1 includes the power value (W) of the system power for each second unit time, and the storage battery data D2 includes the current control mode (charge, discharge, standby) of the storage battery system 2 and the maximum charge / discharge power (W). ), Remaining storage capacity (Wh), communication abnormality alarm data indicating a communication abnormality, and storage battery abnormality alarm data indicating an abnormality of the storage battery 21.

In step # 10 (customer data reception processing, integrated power reception calculation processing), the system 1 transmits the customer data D0 repeatedly transmitted from the storage battery system 2 every second unit time every second unit time. Each data that is repeatedly received and included in the received consumer data D0 is temporarily overwritten and saved in a predetermined storage area (register or the like) provided in the computer constituting the system 1, for example (step). # 101). Subsequently, every time the consumer data D0 is received, it is determined whether or not the communication abnormality alarm data included in the storage battery data D2 indicates an abnormality (step # 102), and if no abnormality is indicated (NO in step # 102). Judgment) determines whether the storage battery abnormality alarm data included in the storage battery data D2 indicates an abnormality (step # 103), and if no abnormality is indicated (NO determination in step # 103), the power received data D1 Multiply the power value of the grid power included in the data by the length of the second unit time (1 second) to calculate the amount of power P2 received within the second unit time, and process one time before (1 second before). The integrated power received amount PA2 is updated by adding it to the integrated power received amount PA2 calculated in (step # 104). The integrated power reception amount PA2 updated every second unit time is temporarily stored in, for example, the above-mentioned predetermined storage area (register or the like). When the discharge necessity determination process (step # 11) and the chargeability determination process (step # 13), which will be described later, are completed at the end of each DC period (i = 30), the integrated power reception amount PA2 is reset to 0. To. Therefore, the integrated power received amount PA2 represents the integrated power received amount for each second unit time from the start time point (i = 0) of each DC period.

When the communication abnormality alarm data or the storage battery abnormality alarm data indicates an abnormality in the two abnormality determinations of step # 102 and step # 103 (YES determination in step # 102 and step # 103), the storage battery control unit 13 has step # 10 (customer data reception processing, integrated power reception amount calculation processing) is stopped. As a result, each subsequent process is also canceled. In step # 10, the series of processes from step # 101 to step # 104 is repeated every second unit time (in the present embodiment, the repetition is 60 within one first unit time (1 minute). Will be done once). The alternate long and short dash arrow in step # 10 schematically illustrates the repeating loop. When the final iterative process within one first unit time is completed, the cumulative power received PA2 temporarily stored in step # 104 is calculated by calculating the cumulative power received within the i-th first unit time of the elapsed number of times. As PA (i), it is stored in the above-mentioned storage area (register or the like) or data storage unit 11 in distinction from the integrated power reception amount PA2 (step # 105).

By the way, since the integrated power reception amount PA2 calculated in step # 104 is calculated using discrete values obtained by sampling the power value of the system power every second unit time, it is a value including a so-called quantization error. It has become. Therefore, as described above, the first reference power receiving amount PR1 (i) is set to be smaller than the target integrated power receiving amount PAT (i) from the first half to the middle of the DC period, thereby causing the quantization error. The influence of can be reduced. Further, the length of the second unit time is not limited to 1 second in the above example, and the limit in which data transmission / reception, determination, and calculation processing can be repeatedly executed in steps # 10 and # 20 and , The influence of the quantization error can be changed within an acceptable range. However, in order to reduce the influence of the quantization error, the length of the second unit time is preferably set as short as possible, and about 1 second in the above example is practically preferable.

Next, in step # 11 (discharge necessity determination process), the storage battery control unit 13 reads out the first reference power reception amount PR1 (i) stored in the data storage unit 11, and the integrated power reception calculated in step # 10. Compare with quantity PA (i). Here, in the case of PA (i)> PR1 (i) (YES branch), the balance included in the storage battery data D2 temporarily saved in step # 10 in step # 12 (first residual storage capacity confirmation process). It is determined whether or not the storage capacity PB (i) is equal to or greater than the lower limit set value PBL of the storage capacity of the storage battery 21 (PB (i) ≥ PBL), and if PB (i) ≥ PBL (YES branch), step # 15 The process proceeds to step # 15a (discharge command processing) in (control command processing). If PA (i) ≤ PR1 (i) is determined in step # 11 (NO branch), the process proceeds to step # 13 (chargeability determination process). If PB (i) <PBL (NO branch) in the determination of step # 12, the process proceeds to step # 15b (standby command processing) in step # 15 (control command processing). In the present embodiment, the lower limit setting value PBL of the storage capacity is set to 0% (rated lower limit value) of the rated value of the storage capacity as an example. This is because if the remaining storage capacity PB (i) of the storage battery 21 is even a little, it is discharged and used to suppress an increase in the integrated power reception amount PA (i). Therefore, in the present embodiment, it is basically rare that PB (i) <PBL is determined in the determination in step # 12. Therefore, in the operation of this system 1, it is premised that the remaining storage capacity of the storage battery 21 is secured to some extent.

Next, when the process shifts from step # 11 (NO branch) to step # 13, the storage battery control unit 13 reads out the second reference power receiving amount PR2 (i) stored in the data storage unit 11, and in step # 10. Compare with the calculated integrated power received PA (i). Here, in the case of PA (i) <PR2 (i) (NO branch), the balance included in the storage battery data D2 temporarily stored in step # 10 in step # 14 (second residual storage capacity confirmation process). It is determined whether or not the storage capacity PB (i) is equal to or less than the upper limit set value PBU of the storage capacity of the storage battery 21 (PB (i) ≤ PBU), and if PB (i) ≤ PBU (YES branch), step # 15 The process proceeds to step # 15c (charging command processing) in (control command processing). If PA (i) ≥ PR2 (i) is determined in step # 13 (YES branch), or if PB (i)> PBU is determined in step # 14 (NO branch), step # 15 (control command processing). ), The process proceeds to step # 15b (standby command processing). In the present embodiment, the upper limit set value PBU of the storage capacity is set to 100% (rated upper limit value) of the rated value of the storage capacity as an example.

In the present embodiment, the lower limit set value PBL and the upper limit set value PBU of the storage capacity are stored in the data storage unit 11 in advance.

Next, when the process proceeds to step # 15 (control command processing), any one of step # 15a (discharge command processing), step # 15b (standby command processing), and step # 15c (charging command processing) is processed. In, the control command data DC relating to the charge / discharge of the storage battery system 2 is created and transmitted to the storage battery system 2 via the data communication unit 12.

In step # 15a (discharge command processing), control command data DC (discharge) including the control mode “discharge” and the maximum charge / discharge power of the storage battery data D2 temporarily stored in step # 104 as the discharge power instruction value MD1. (Equivalent to command data) is created and transmitted to the storage battery system 2 via the data communication unit 12. “Discharge” in the control mode is a content that instructs the storage battery system 2 to discharge with the discharge power specified by the discharge power instruction value MD1.

In step # 15c (charging command processing), control command data DC (charging) including "charging" in the control mode and the maximum charge / discharge power of the storage battery data D2 temporarily stored in step # 104 as the charging power instruction value MD2. (Equivalent to permission data) is created and transmitted to the storage battery system 2 via the data communication unit 12. “Charging” in the control mode is a content that allows the storage battery system 2 to be charged with the charging power specified by the charging power indicated value MD2.

In step # 15b (standby command processing), control command data DC (corresponding to standby command data) including "standby" in the control mode is created and transmitted to the storage battery system 2 via the data communication unit 12. The power instruction value of the charge / discharge power instruction value MD included in the control command data DC is 0. "Standby" in the control mode is a content that instructs the storage battery system 2 to stand by without charging or discharging.

Next, in step # 15, when the storage battery control unit 13 creates the control command data DC in the same manner as described above and transmits it to the storage battery system 2 via the data communication unit 12, the storage battery system 2 will perform the control command data DC in step # 21. Upon receiving the control command data DC, the built-in storage battery is controlled to be discharged, charged, or standby based on the contents of the control command data DC. The control is continued until the next control command data DC is received from the storage battery control unit 13. The control on the storage battery system 2 side is a well-known control performed in the existing storage battery system, and is not the main purpose of the present invention, so detailed description thereof will be omitted.

In the above description, it is assumed that the maximum charge / discharge power is repeatedly received every second unit time in step # 10 (consumer data reception processing, integrated power reception calculation processing) as a part of the storage battery data D2. However, it may be stored in the data storage unit 11 in advance in the same manner as the lower limit set value PBL and the upper limit set value PBU of the storage capacity without being included in the storage battery data D2.

[Another Embodiment]
Next, another embodiment of the above embodiment will be described.

<1> In the above embodiment, in step # 20, the storage battery system 2 uses the power value (W) of the system power for each second unit time measured by the power meter 4 as the power received data D1 to the system 1. It is assumed that the storage battery control unit 13 of the system 1 calculates the integrated power reception amount PA (i) based on the power value of the system power for each second unit time in the above step # 10.

However, instead of the power meter 4 that measures the power value (W) of the system power, a power meter that measures the integrated power amount from a predetermined integration reference time may be used. In this case, the storage battery system 2 does not necessarily have to transmit the received electric energy data D1 of the integrated electric energy measured by the electric energy meter to the system 1 every second unit time, and the first one within each DC period. It suffices to transmit at the start time of the process repeated every unit time (the time when the i-th elapsed time T (i) arrives), and further, the system 1 transfers the integrated electric energy to the storage battery system 2. It may be received directly from the electric energy meter without passing through.

When the system 1 receives the integrated electric energy as the electric energy data D1 from the storage battery system 2 or the electric energy meter, the storage battery control unit 13 of the system 1 replaces the above steps # 104 and # 105. , The DC period at each elapsed time T (i) simply by subtracting the integrated electric energy received at the end of the previous DC period (i = 30) from the integrated electric energy received at the elapsed time T (i). The integrated electric energy PA (i) from the start time (i = 0) can be easily calculated.

<2> In the above embodiment, the second reference power receiving amount PR2 (i) is set in advance, and the storage battery control unit 13 performs step # 13 (chargeability determination processing) and step # 14 (second residual storage capacity). The case where the confirmation process) and the step # 15c (charge command process) are performed has been described, but the storage battery control unit 13 does not perform each process of steps # 13, # 14, and # 15c, and the determination in step # 11 is performed. When PA (i) ≤ PR1 (i) (NO branch), the process may be shifted to step # 15b (standby command processing) in step # 15 (control command processing). Therefore, it is not necessary to set the second reference power receiving amount PR2 (i) in advance and record it in the data storage unit 11. That is, there are two types of control modes, "discharge" and "standby" (in this case, standby for discharge). When the control mode is "standby", whether or not to charge the storage battery 21 is determined by the storage battery. Leave it to the system 2 side. Therefore, on the storage battery system 2 side, when a standby command is received from the system 1 as control command data DC, whether or not to charge the battery according to a preset algorithm based on the remaining storage capacity at that time. May be determined and the charging process may be performed.

However, in this case, even in the case where PA (i) ≥ PR2 (i), the storage battery system 2 may charge the storage battery 21.

<3> In the above embodiment, the second reference power receiving amount PR2 (i) is set to 0% of the target value PT in the second initial period from the start time of the DC period (i = 0) to the elapse of a predetermined time. Therefore, charging of the storage battery system 2 is not permitted.

However, in the second initial period, the second reference power receiving amount PR2 (i) does not necessarily have to be set to 0% of the target value PT. For example, the first reference power receiving amount PR1 at the end of the second initial period. When (i) is set higher, similarly, the second reference power receiving amount PR2 (i) at the end of the second initial period is also set slightly higher than the target value PT of 0%, and the second 2. The second reference power receiving amount PR2 (i) may be set to monotonically increase from the start time to the end time of the initial period. Even with such a setting, the integrated power reception amount PA (i) is expected to increase to some extent within the second initial period. Therefore, in the second initial period, the second reference power reception amount PR2 (i) is set to the target value PT. The same effect as when set to 0% can be expected to some extent.

<4> In the above embodiment, in the control command process (step # 15) performed by the storage battery control unit 13 illustrated in FIG. 5, the discharge command process (step # 15a), the charge command process (step # 15c), and the standby command process are performed. It is assumed that any one of the command processes in (step # 15b) is to be performed, but if the discharge command process (step # 15a) and the charge command process (step # 15c) are not performed, the standby command process (step). The control command data DC may not be transmitted to the storage battery system 2 without performing # 15b). In this case, as an example, when the storage battery system 2 side receives the control command data DC, the processing based on the discharge or charge command included in the control command data DC is performed only for the first unit time (1 minute). After that, when the control command data DC is not received, it may stand by without discharging or charging.

<5> In the above embodiment, the processing procedure and content of each processing performed by the storage battery control unit 13 illustrated in FIG. 5 is an example, and is not limited to the processing procedure and content shown in FIG. For example, in the flowchart of FIG. 5, step # 11 (discharge necessity determination process) was performed before step # 13 (charge availability determination process), but step # 13 may be performed before step # 11. .. Further, step # 11 and step # 13 are performed first, and based on the result, either step # 12 (first residual storage capacity confirmation process) or step # 14 (second residual storage capacity confirmation process) is executed. You may try to do it.

Further, also in step # 10 (customer data reception processing, integrated power reception amount calculation processing), the order of the two abnormality determinations of step # 102 and step # 103 may be changed. Further, without performing the two abnormality determinations, instead of the communication abnormality alarm data or the storage battery abnormality alarm data, the storage battery system 2 receives the alarm data requesting the system 1 to stop the control, and the alarm data. Based on the above, step # 10 (customer data reception processing, integrated power reception amount calculation processing) and subsequent processing may be canceled.

Further, in the above embodiment, in step # 11 (discharge necessity determination process), when PA (i) = PR1 (i), a NO branch occurs and the process proceeds to step # 13 (chargeability determination process). As a YES branch, the process may proceed to step # 12 (first residual storage capacity confirmation process).

Further, in the above embodiment, in step # 12 (first residual storage capacity confirmation process), when PB (i) = PBL, a YES branch occurs and the process proceeds to step # 15a (discharge command process), but NO. As a branch, the process may proceed to step # 15b (standby command processing).

Further, in the above embodiment, in step # 13 (chargeability determination processing), when PA (i) = PR2 (i), a YES branch occurs and the process proceeds to step # 15b (standby command processing). As a branch, the process may proceed to step # 14 (second residual storage capacity confirmation process).

Further, in the above embodiment, in step # 14 (second residual storage capacity confirmation process), when PB (i) = PBU, a YES branch occurs and the process proceeds to step # 15c (charge command process). As a branch, the process may proceed to step # 15b (standby command processing).

Further, in this system 1, step # 12 (first residual storage capacity confirmation process) and step # 14 (second residual storage capacity confirmation process) are not performed, and the same process is controlled as discharge command data or charge permission data. It may be performed on the storage battery system 2 side that has received the command data DC. That is, when the remaining storage capacity PB (i) is less than or equal to the lower limit set value PBL, the storage battery system 2 does not discharge regardless of the discharge command data, and the remaining storage capacity PB (i) is equal to or more than the upper limit set value PBU. Alternatively, in the case of excess, charging may not be performed regardless of the charging permission data.

<6> In the above embodiment, in step # 15a (discharge command processing), control command data DC (corresponding to discharge command data) including the maximum charge / discharge power as the discharge power instruction value MD1 is created, and step # 15c (charging). In the command processing), it is assumed that the control command data DC (corresponding to the charge permission data) including the maximum charge / discharge power as the charge power instruction value MD2 is created, but the discharge power instruction value MD1 and the charge are added to the control command data DC. The power indicated value MD2 does not necessarily have to be included. However, in this case, when the storage battery system 2 side receives the discharge or charge control command data DC, the discharge or charge power instruction value is set to the maximum charge / discharge power or the like, and the discharge or charge process is executed. It shall be configured to be possible.

<7> In the above embodiment, it is assumed that the system 1 of the present invention and the storage battery system 2 are configured as separate systems from each other, but a part or all of the system 1 of the present invention is a part of the storage battery system 2. It may be configured, or a part or all of the controller 22 and the communication device 23 excluding the storage battery 21 of the storage battery system 2 may be configured as a part of the system 1 of the present invention. As an example, the storage battery control unit 13 of the system 1 of the present invention and the controller 22 of the storage battery system 2 may be configured on the same computer, in which case the above-mentioned data communication path 3 is configured as a data bus in the computer. May be done.

The present invention is a storage battery system of a consumer so that the integrated amount of system power received from the start of each DC period in the consumer who is the target of demand response does not exceed a predetermined target value within each DC period. It can be used for controlling the discharge of the electric power stored in the battery.

1: Storage battery control system 11: Data storage unit 12: Data communication unit 13: Storage battery control unit 2: Storage battery system 21: Storage battery 22: Controller 23: Communication device 3: Data communication path 4: Power meter

Claims (14)

The integrated power reception amount of the system power from the start time of each demand cut period (hereinafter, DC period) in the consumer who is the target of the demand cut does not exceed a predetermined target value within each DC period. A storage battery control system that controls the discharge of electric power stored in a customer's storage battery system.
Whether or not to discharge the storage battery system with respect to the integrated power received amount at each of the elapsed times from the start time of each DC period for each first unit time in which the length of the DC period is evenly subdivided. A data storage unit that records the first reference power received amount, which is the criterion for judgment,
A data communication unit that sends and receives data to and from the storage battery system,
Based on the power received amount data indicating the integrated power received amount from the start time to the elapsed time received at a predetermined reception timing via the data communication unit, the integrated power received amount and the integrated power received amount are described every first unit time. When the magnitude relationship with the first reference power reception amount is determined and it is determined that the integrated power reception amount is equal to or greater than or exceeds the first reference power reception amount, a discharge command is issued to the storage battery system via the data communication unit. It is equipped with a storage battery control unit that transmits data.
Within each of the DC periods, the first reference power receiving amount is set to monotonically increase from the lower limit value to the upper limit value as the elapsed time increases for each first unit time.
When the integrated power reception amount linearly increasing from 0% to 100% of the target value with respect to the increase of the elapsed time from the start time to the end time of the DC period is defined as the target integrated power reception amount, the target The difference obtained by subtracting the first reference power received from the integrated power received increases monotonically during the first initial period from the start of each DC period to the elapse of a predetermined time, and is positive at the end of the first initial period. A storage battery control system characterized in that it becomes a maximum value and is set to monotonically decrease from the end of the first initial period until the first reference power receiving amount reaches the upper limit value. The data communication unit receives the storage battery data including the remaining storage capacity of the storage battery system together with the power reception amount data at the predetermined reception timing.
Even when the storage battery control unit determines that the integrated power reception amount is equal to or more than or exceeds the first reference power reception amount, if the remaining storage capacity is less than or less than a predetermined lower limit set value, The storage battery control system according to claim 1, wherein the discharge command data is not transmitted. The storage battery control unit determines the magnitude relationship between the integrated power reception amount and the first reference power reception amount every first unit time, and then transmits the standby command data when the discharge command data is not transmitted. The storage battery control system according to claim 1 or 2. The length of the first initial period is set to 10% or more and 30% or less of the length of the DC period.
Claims 1 to 3 characterized in that, at the end of the first initial period, the difference obtained by subtracting the first reference power receiving amount from the target integrated power receiving amount is set to 10% or less of the target value. The storage battery control system according to any one of the above. The invention according to any one of claims 1 to 4, wherein the first reference power receiving amount maintains the upper limit value in the first end preparation period within a predetermined time immediately before the end of the DC period. Battery control system. The length of the first end preparation period is set to be equal to or greater than the first unit time, 10% of the length of the DC period, or three times the first unit time, whichever is greater. The storage battery control system according to claim 5. Claims 1 to 6, wherein the lower limit value is set to 0% or more and 5% or less of the target value, and the upper limit value is set to 95% or more and 99% or less of the target value. The storage battery control system according to any one item. The data storage unit determines whether or not to allow charging of the storage battery system with respect to the integrated power received amount at each of the elapsed times from the start time of each DC period for each first unit time. It records the second standard power reception amount, which is the standard.
The storage battery control unit
Based on the data indicating the accumulated power received from the start time to the elapsed time, the magnitude relationship between the integrated power received and the second reference power received is determined for each first unit time.
When it is determined that the integrated power reception amount is less than the second reference power reception amount, charging permission data is transmitted to the storage battery system via the data communication unit.
Within each of the DC periods, the second reference power receiving amount increases monotonically from the lower limit value to the upper limit value without decreasing in the middle as the elapsed time increases for each first unit time. And, except for the start time and the end time of the DC period, at each of the elapsed times of the first unit time, the amount of power received is less than the first reference power receiving amount, and with the start time of the DC period. The storage battery control system according to any one of claims 1 to 7, wherein the storage battery control system is set so as to be equal to or less than the first reference power receiving amount at each of the end points. The eighth aspect of the present invention, wherein the second reference power receiving amount is set to 0% of the target value in the second initial period from the start time of each DC period to the elapse of a predetermined time. Storage battery control system. The data communication unit receives the storage battery data including the remaining storage capacity of the storage battery system together with the power reception amount data at the predetermined reception timing.
Even when the storage battery control unit determines that the integrated power reception amount is less than the second reference power reception amount, if the remaining storage capacity is equal to or more than or exceeds a predetermined upper limit set value, the charge permission data The storage battery control system according to claim 8 or 9, wherein the storage battery control system is not transmitted. The storage battery control unit transmits the discharge command data when the charge permission data is not transmitted after determining the magnitude relationship between the integrated power reception amount and the second reference power reception amount every first unit time. The storage battery control system according to any one of claims 8 to 10, wherein the standby command data is transmitted, except for the case where the storage battery control system is used. The storage battery control system according to any one of claims 8 to 11, wherein the length of the first initial period and the length of the second initial period are set to be the same. A program for causing a computer to function as the storage battery control unit of the storage battery control system according to any one of claims 1 to 12. A computer-readable recording medium on which a program for causing a computer to function as the storage battery control unit of the storage battery control system according to any one of claims 1 to 12 is recorded.

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