JP2012165605A - Power supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply system that can level power consumption more than an existing power supply system.SOLUTION: A power supply system 1 includes: a distributed power supply apparatus 10 connected to a branch line 2A extending from a power system 2 to a load 3 and configured to charge with power from the power system 2 or discharge the stored power to the load 3; and control means 20 for controlling the charging/discharging of the distributed power supply apparatus 10 to level the power received from the power system 2. The power supply system 1 further includes input value measuring means 30 for measuring an input value that is a substantial value of electric power or electric energy (integral value of power and time) input from the power system 2 to the load 3. The control means 20 of the power supply system 1 controls the charging/discharging of the distributed power supply apparatus 10 in accordance with the input value measured by the input value measuring means 30.

Description

  The present invention includes a distributed power supply device that is connected to a branch path that branches from a power system and leads to a load, and a control unit that controls charging / discharging of the distributed power supply device, and leveles the power received from the power system. The power supply system.

  A power system constructed by an electric power company or the like is connected with a plurality of loads of consumers who receive power from the power system. Here, in many customers, the amount of power used (hereinafter referred to as power consumption) generally fluctuates greatly throughout the day. For example, in ordinary households in summer, the power consumption during the daytime is very large, and the power consumption tends to be small at night (especially during sleeping hours). When the power consumption of the day fluctuates in this way, the electric power company is forced to perform inefficient power generation that adjusts the operating rate of the generator according to the fluctuation. Therefore, in recent years, attempts have been made to level the power (that is, power consumption) received from the power system on the load side throughout the day.

  As a representative technique for leveling power consumption on the load side, a distributed power supply device branched from the power system and connected to a branch path connected to each load, and a control means for controlling the operation of the distributed power supply device, A power supply system provided has been proposed (see, for example, Patent Document 1). In this power supply system, the power is charged from the power system to the distributed power supply device during the time when the power consumption is low, and the stored power is discharged from the distributed power supply device to the load during the time when the power consumption is high. Leveling. If such a power supply system spreads to consumers, the electric utility can make an efficient power generation plan. Promoting the spread of power systems.

JP 2001-95175 A

  However, in the conventional power supply system, the distributed power supply device is charged from the power system during the time period in which the power consumption is considered to be low, and the load is discharged from the distributed power supply apparatus to the load in the time zone in which the power consumption is considered to be high. The distributed power supply device was controlled according to a predetermined schedule. For this reason, it was difficult to say that the leveling of power consumption was still sufficient. The power consumption varies greatly from day to day due to the influence of weather, temperature, etc., and in some cases it may rise suddenly even within a day, so a distributed power supply device according to a predetermined schedule This is because it is not possible to cope with the fluctuations when controlling.

  In addition, some of the customers have contracts with electric power companies that make electricity charges cheaper by keeping the amount of power used in a specific time zone (the integrated value of power and time) within the contracted power amount range. Some people. In that case, the conventional power supply system cannot cope with the sudden increase in power consumption, and the amount of power used may exceed the contracted power amount.

  The present invention has been made in view of the above circumstances, and one of its purposes is to provide a power supply system capable of leveling power consumption more than a conventional power supply system.

  The present invention relates to a distributed power supply device that is connected to a branch path that leads from an electric power system to a load, charges the electric power from the electric power system, or discharges the stored electric power to the load, and charge / discharge of the distributed power supply device. The present invention relates to a power supply system comprising: control means for controlling and leveling power received from the power system. The power supply system according to the present invention further includes an input value measuring unit that measures an input value that is a substantial value of electric power or electric power (integrated value of electric power and time) input from the electric power system to the load. And the control means of this invention power supply system controls charging / discharging of a distributed power supply device based on the input value measured by the said input value measurement means.

  According to the power supply system of the present invention, since the distributed power supply device is controlled in real time according to the substantial input power (or input power amount) from the power system to the load, the power is leveled compared to the conventional power supply system. Excellent ability to do. In particular, when a consumer who uses the load has a contract with the electric power utility of the power system regarding the “power consumption” according to the time zone, the power usage amount of the load during that time zone is the contracted power amount. Can be effectively prevented. Moreover, when the electric power company and the consumer have a contract regarding “power consumption”, it is possible to effectively prevent the power consumption of the load from exceeding the contract power.

  As one form of the power supply system of the present invention, the control means provided in the power supply system includes a target value setting unit that sets a target value of power or electric energy input from the power system to the load, and a difference between the input value and the target value. And an operation determining unit that determines an operation to be performed by the distributed power supply device based on the operation. Specifically, when “input value> target value” is satisfied, the operation determination unit determines that “distributed power supply unit performs discharge”, and when “input value <target value” is satisfied, operation determination is performed. The unit determines that “the distributed power supply device is charged”. In addition, when “input value = target value”, the operation determination unit may determine that the distributed power supply device is discharged, may determine that charging is performed, and may be charged. It may be determined that no discharge is performed. And a control means operates a distributed power supply device based on the judgment of an operation judgment part.

  If the “input value” is a value related to power, the “target value” may be a value related to power. In addition, if the “input value” is a value related to the electric energy, the “target value” may be a value related to the electric energy or a value related to the electric power. When the “input value” is a value related to the electric energy and the “target value” is a value related to the power, the input value may be divided by the measurement time to obtain the input power, and the input power may be compared with the target value.

  As in the above configuration, by setting a target value and controlling the distributed power supply device based on the target value, it is possible to further level the power received from the power system.

  As one form of the power supply system of the present invention, it is preferable that the target value setting unit provided in the control means of the power supply system changes the target value according to the time zone.

  The target value has an optimum value according to the time zone. For example, it is preferable to reduce the target value in a time zone in which the power consumption (power consumption) of the load is small, for example, in the late night time zone of a general household. In the time zone when the power consumption (power consumption) of the load is small, the distributed power supply device is charged. However, the distributed power supply device has a capacity, and the distributed power supply device is charged beyond that capacity. I can't. Therefore, even if the target value is set large, there is a possibility that the distributed power supply device cannot be charged and cannot be brought close to the target value. On the other hand, the power supply system can be efficiently operated by changing the target value according to the time zone.

  As one form of the power supply system of the present invention, a charging prohibition time zone may be set by a control means provided in the power supply system. Even when the operation determination unit of the control unit determines that “the distributed power supply apparatus is charged” in the charge prohibition time period, the control unit does not follow the determination. On the other hand, when the operation determination unit determines that “the distributed power supply device is discharged” or “the distributed power supply device is neither charged nor discharged”, the control device controls the distributed power supply device according to the determination. . Alternatively, the control device may be configured to follow the determination only when the operation determination unit determines that “the distributed power supply device performs discharge”.

  There are times during the day when power consumption at the load is high. For example, in summer homes and factories, daytime power consumption is high. If the distributed power supply device is further charged in such a time zone in which power consumption is originally high, the power system will be heavily burdened when power consumption suddenly increases thereafter. Further, when a consumer has a contract such as a night discount with an electric power company, it is uneconomical to charge the distributed power supply in the daytime when the electricity charge is expensive. Thus, if the charge prohibition time zone is assigned to a time zone during which the power consumption is originally high, the power consumption of the consumer can be kept low, and the electric utility can easily make a power generation plan. Moreover, if a charge prohibition time zone is allocated to a time zone when electricity charges are high, an economic merit is produced for the consumer. There may be a case where a time zone in which the power consumption is high overlaps with a time zone in which the electricity bill is expensive.

  As one form of the power supply system of the present invention, a discharge prohibition time zone may be set in the control means. In this discharge inhibition time zone, even if the operation determination unit of the control means determines that “the distributed power supply apparatus performs discharge”, the control means does not follow the determination. On the other hand, when the operation determination unit determines that “the distributed power supply device is charged” or “the distributed power supply device is not charged or discharged”, the control device controls the distributed power supply device according to the determination. . Alternatively, the control device may be configured to follow the determination only when the operation determination unit determines that “the distributed power supply device is charged”. The daily time schedule of the power supply system may be constituted by a charge prohibition time zone and a discharge prohibition time zone, or these two time zones may be controlled separately from those two time zones. It may be configured with a time zone.

  By providing a discharge prohibition time zone in which charging is performed exclusively as in the above configuration, sufficient power can be accumulated in the distributed power supply device. As a result, an increase in power consumption can be reliably suppressed in a time zone such as daytime when power consumption increases.

  As an embodiment of the power supply system of the present invention, the control means provided in the power supply system may be configured to control the distributed power supply device according to a predetermined schedule in the discharge inhibition time zone. Of course, since this schedule is a schedule in the discharge prohibited time zone, the discharge command is not included in this schedule.

  In the discharge inhibition time zone, even though the power consumption may fluctuate, it is basically considered that there is little possibility that the power consumption becomes too large. Therefore, if the distributed power supply is controlled according to the schedule determined in the discharge prohibition time zone, it is not necessary to always operate the input value measuring means and the distributed power supply, and the power supply system can be operated efficiently and economically. Can do.

  As one embodiment of the power supply system of the present invention, an operation stop time zone may be set in the control means. In this operation stop time zone, the control means provided in the power supply system does not control the distributed power supply apparatus.

  There may be times during the day when power consumption does not increase or decrease. For example, it corresponds to a sleeping time zone of a general household. If the operation stop time period is set in such a time period where there is almost no increase or decrease in power consumption, it is possible to eliminate the power consumption necessary for the operation of the distributed power supply apparatus. As a result, it is possible to reduce the amount of power consumed by consumers throughout the day.

  As one form of the power supply system of the present invention, the target value setting unit provided in the control means of the power supply system may be configured to set the target value based on a plurality of input values obtained during a past fixed period. The fixed period for obtaining the input value is 5 seconds to 1 day when aiming for efficient operation in a short time, and 1 day to 7 days when aiming for operation that makes power consumption almost constant throughout the day. It is preferable to do.

  If the target value is set from the trend of power consumption in a short period of 5 seconds to 1 day, it is possible to operate the power supply system efficiently according to the time zone. On the other hand, according to the above configuration in which the target value is set from the trend of power consumption over a long period of 1 day to 7 days, it is possible to set a target value that can make the power consumption almost constant throughout the day.

  According to the power supply system of the present invention, the power consumption can be leveled as compared with the conventional power supply system.

1 is a schematic configuration diagram of a power supply system according to an embodiment. It is a flowchart which shows an example of the basic control of the power supply system which concerns on embodiment.

<Embodiment 1>
≪Overall structure≫
As shown in FIG. 1, a plurality of branch paths 2 </ b> A to 2 </ b> D extending toward the load 3 of each consumer are provided from the power system 2 supplied by the electric power company. Hereinafter, the power supply system 1 provided in the branch path 2A among the branch paths 2A to 2D will be described.

  The power supply system 1 includes a distributed power supply device 10 connected to a branch path 2A connected from the power system 2 to the load 3, a control unit 20 that controls charging / discharging of the distributed power supply device 10, and an input from the power system 2 to the load 3. Input value measuring means 30 for measuring a substantial value (input value) of the power to be generated. The distributed power supply device 10 can charge the power from the power system 2 and can discharge the stored power to the load 3. Further, the control unit 20 controls charging / discharging of the distributed power supply device 10 based on the input value measured by the input value measuring unit 30. Hereinafter, each component will be described in the order of the distributed power supply device 10, the input value measuring means 30, and the control means 20, and finally the operation method of the power supply system 1 will be described.

[Distributed power supply]
The distributed power supply apparatus 10 is not particularly limited as long as it is configured as long as it can store power and discharge the stored power as necessary. For example, a secondary battery such as a Ni—H battery, a Li ion battery, a NaS battery, or a redox flow battery can be used as the distributed power supply device 10. In addition, the power may be stored in a form different from the electrochemical form. For example, the distributed power supply apparatus 10 is composed of a hydrogen production apparatus, a hydrogen storage tank, and a fuel cell. In that case, hydrogen is produced by a hydrogen production apparatus using electric power and stored in a hydrogen storage tank, and electric power is stored. When the electric power is discharged, the fuel cell generates electricity using hydrogen in the tank. As described above, among these exemplified configurations, the redox flow battery is preferable because a large-capacity battery can be easily constructed. As the redox flow battery, a battery using V, Fe, Cr, Br, Mn, Ti ions or the like as the electrolyte is suitable.

  The distributed power supply device 10 is connected to the branch path 2 </ b> A via an AC circuit breaker 61, a power output measuring means 50, a transformer 62, an AC / DC converter 40, and a DC circuit breaker 63. Among these 61, 50, 40, and 62, the AC / DC converter 40 is a device that converts alternating current into direct current or converts direct current into alternating current. By controlling the AC / DC converter 40, it is possible to control whether the distributed power supply 10 is charged with power from the branch path 2A of the power system 2 or whether the power is discharged from the distributed power supply 10 to the load 3. . The power output measuring means 50 measures the power during charging when the distributed power supply 10 is charged, and measures the power during discharging when discharging from the distributed power supply 10. The measurement result is input to the control means 20 to be described later, and is used as a standard for changing the charging power or discharging power. A usage example of the measurement result will be described later. For the power output measuring means 50, a very general power measuring device can be used.

[Input value measuring means]
The input value measuring means 30 is provided on the power system 2 side from the junction 11 between the distributed power supply device 10 and the branch path 2A, and measures the substantial power (input value) input from the power system 2 to the load 3. It is means to do. As this input value measuring means 30, a very general power measuring device can be used.

  The AC circuit breaker 31 provided on the branch path 2A between the input value measuring means 30 and the power system 2 is for use during maintenance of the power supply system 1 and the load 3 or the like.

[Control means]
Based on the information from the input value measuring means 30, the control means 20 charges the distributed power supply 10 from the power system 2, discharges the power from the distributed power supply 10 to the load 3, or distributes the power supply It is determined whether the apparatus 10 is not moved. And based on the determination, the AC / DC converter 40 is operated and the distributed power supply device 10 is actually operated. The control means 20 can be configured by a computer or the like.

  The control means 20 includes an operation determination unit 21 that determines how to operate the distributed power supply apparatus 10, and a target value setting unit 22 that determines a target value that is a power value that serves as an index for determining the operation. And are provided. The functions of the operation determination unit 21 and the target value setting unit 22 and the significance of the target value will be described in detail in the following “Power System Operation Method”.

≪Distributed power supply operation method≫
[Basic control]
The basic control of the power supply system 1 will be described with reference to FIGS. First, the power supply system 1, the input value measuring means 30 provided in the branch path 2A, the input power (input value) input from the power system 2 to the load 3 to measure P _L (S1 in FIG. 2). The input power P _L is synonymous with power consumption. The input power P _L is holds temporarily the control unit 20.

Next, the operation determination unit 21 of the control means 20, from the target value setting unit 22 calls the target value _{P S} of the input power (S2 in FIG. 2), distributed power supply from the input power _{P L} and the target value _{P S} 10 The operation to be performed is determined (S3 in FIG. 2). The determination of the operation to be performed by the distributed power supply 10 in the operation determination unit 21, as shown in S3 of FIG. 2, or the input power P _L is larger than the target value P _S, i.e., the current power consumption (P _L) Is larger than the target power consumption (P _S ). Here, the target value P _S can be divided into the following four patterns.

(1) it is a fixed value referred day here a constant fixed value, is that the target value P _S which has been input in advance to the target value setting section 22. If all day a constant target value P _S, it is possible to equalize the power consumption. In the case where a contract that defines an upper limit of power consumption and electric utilities, a fixed value (a target value P _S) is preferably set to be 90 to 99% of the contract power. If the same target value P _S is the contract power can not accommodate the increased sudden power consumption, there is a possibility that the power consumption exceeds the contract power. Target value _{P S} also in the following (2) to (4) is set to fall from 90 to 99% of the contract power.

(2) a fixed value varies depending on the time of day for example, daytime and the target value P _S and 100 at night the target value P _S as such and 90, advance a target value set a fixed value corresponding to the time zone Input to the unit 22. In this case, although the effect of leveling the power consumption is inferior to the above (1), the efficient power supply system 1 can be operated in accordance with the actual power consumption in each time zone.

(3) The variation values here fluctuation value that changes depending on the day, the target value setting unit 22 with reference to the input power P _L during a certain period in the past is the target value P _S appropriately determined. For example, the input power P _L over several days is recorded, and the average value is used as the target value P _S throughout the day. Then, the next day, the newly set a target value P _S to be used all day. Details will be described in the additional control 5 described later.

(4) several times calculated variation value of the change value day changes according to time zones, each time resetting the variation value calculated target value P _S. Details will be described in the additional control 6 described later.

Finally, based on the determination result of the operation determination unit 21, the control unit 20 controls the AC / DC converter 40 to operate the distributed power supply device 10. Specifically, when the input power P _L ≧ target value P _S , the operation determination unit 21 determines that “the distributed power supply device 10 should be discharged to the load 3”, and the control unit 20 According to the determination, the distributed power supply 10 is discharged to the load 3 (S4 in FIG. 2). On the other hand, when the input power P _L <target value P _S , the operation determination unit 21 determines that “the distributed power supply apparatus 10 should be charged from the power system 2”, and the control unit 20 determines the power system according to the determination. 2 to charge the distributed power supply 10 (S5 in FIG. 2). Here, when the input power P _L = the target value P _S , the distributed power supply device 10 may not be operated.

Here, it is determined by referring to the measurement result of the power supply output measuring means 50 how much power should be charged to the distributed power supply device 10 or how much power should be discharged from the distributed power supply device 10. Just do it. For example, consider a case where the input power P _L > the target value P _S at the present time and the power of P ₀ is discharged from the distributed power supply device 10. When a predetermined time has elapsed from that state, if the measurement result of the input value measuring means 30 again satisfies the input power P _L > the target value P _S , the control means 20 uses the distributed power supply device 10 at the current power P _0. Is determined to be insufficient and the output of the distributed power supply 10 is increased (the amount of discharge from the distributed power supply 10 is increased). For example, the output of the distributed power supply apparatus 10 is changed to “current power P ₀ ” + “insufficient power (P _L −P _S )”.

If you are operating a power supply system 1 according to the flowchart described above, the larger the input power P _L is in accordance with the requirements of the load 3, to the input power P _L is supplemented with power from distributed power device 10 is reduced, the input power P _L if it becomes smaller, the electric power is charged in the distributed power system 10 from the power grid 2, the input power P _L increases. As a result, the input power P _L can be brought close to the target value P _S throughout the day, that is, the power consumption can be leveled.

  Hereinafter, a method for controlling the distributed power supply apparatus 10 for more efficient operation of the power supply system 1 will be described. Note that the following additional controls 1 to 6 can be combined as long as the control contents do not contradict each other.

[Additional control 1]
The power consumption of general consumers varies greatly depending on the time of day. For example, in ordinary households in summer, power consumption tends to increase during the daytime. Therefore, it is preferable that the daytime time zone is a charging prohibition time zone in which charging to the distributed power supply device 10 is prohibited. In this charging prohibition time zone, even if the input power P _L <target value P _{S in} S3 of FIG. 2 and the operation determination unit 21 determines that “the distributed power supply device 10 should be charged from the power system 2”, the control means 20 ignores the decision.

  By providing the charging prohibition time zone, even if the power consumption suddenly increases in the charging prohibition time zone where the power consumption is generally high and then suddenly increases, the burden on the power system 2 increases. Never too much. This is because even if the power consumption is unexpectedly reduced, the power is not charged from the power system 2 to the distributed power supply device 10 at that time.

  In addition, when a consumer has a night discount contract with an electric power company, it is uneconomical to charge the distributed power supply device 10 during the daytime when electricity charges are expensive, but a charge prohibition time zone is allocated during the daytime. The problem can be solved.

[Additional control 2]
It is also preferable to provide a discharge inhibition time zone in addition to the charge inhibition time zone. The discharge prohibited time zone is preferably set at night when the power consumption is generally smaller than the daytime. In this discharge inhibition time zone, even if the input power P _L ≧ target value P _{S in} S3 of FIG. 2 and the operation determination unit 21 determines that the distributed power supply device 10 should discharge to the load 3, the control means 20 Ignore judgment.

  By providing the discharge prohibition time zone, sufficient power can be stored in the distributed power supply device 10 in preparation for the daytime when the power consumption reaches its peak (charge prohibition time zone). At night, the power consumption is lower than in the daytime, and even if the power consumption increases momentarily, the power consumption is rarely maintained for a long time.

  Even when the power consumption is generally small, such as at night, the instantaneous power consumption may exceed the contracted value. If such a problem is reliably avoided, the control shown in the flowchart of FIG. 2 is performed even at night.

[Additional control 3]
In the discharge inhibition time zone indicated by the additional control 2, the distributed power supply device 10 may be controlled according to a predetermined schedule. At night, the power consumption may fluctuate, but the power consumption rarely increases too much. Therefore, if the distributed power supply device 10 is controlled according to the schedule determined in the discharge inhibition time zone, the input value measuring means 30, the power supply output measuring means 50, and the distributed power supply apparatus 10 do not need to be constantly operated, which is efficient. The power supply system 1 can be operated economically.

[Additional control 4]
In addition to the charge inhibition time zone and the discharge inhibition time zone shown in the additional control 2, an operation stop time zone in which neither the charging nor discharging by the distributed power supply apparatus 10 is performed may be provided. For example, the power consumption rarely increases or decreases during sleeping hours in a general household. It is inefficient to operate the input value measuring means 30 and the distributed power supply device 10 during such bedtime. Therefore, by allocating the operation stop time zone to the bedtime time zone, it is possible to save power for operating the input value measuring means 30 and the distributed power supply device 10.

[Additional control 5]
This item, with reference to the input power P _L in a certain period in the past in longer span determines a target value P _S, illustrating the control for all-day use target value P _S of the decision. For example, using day average power calculated from the total amount of power 1 to 7 days as the target value P _S. Then, the next day, it repeated resetting the average power calculated from the total amount of power 1 to 7 days including the day before as the target value P _S. By performing such control, the daily power consumption can be leveled, and the power consumption leveling according to the time (season, busy season of customers, etc.) can be achieved.

[Additional control 6]
In this article, with reference to the input power P _L during a certain period in the past in short span determines a target value P _S, each time, an example of resetting the target value P _S. For example, the determining an average power from the total power of 5 seconds to 1 day, by adding a correction value corresponding to the measured time period to the average power to determine the target value P _S. Then, to update the old target value P _S, the target value P _S, which was newly obtained. If such control is performed, although the effect of leveling the power consumption is small as compared with the additional control 5, the operation of the power supply system 1 can be performed efficiently according to the time zone. For example, it is possible to eliminate the waste of excessively charging the distributed power supply device 10 during a time period when the power consumption is very small. Here, if more efficient operation of the power supply system 1 according to the time zone is performed, the measurement period is preferably 1 minute to 1 day, more preferably 1 minute to 3 hours. Most preferably, it is between minutes and 1 hour.

  The embodiment of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist of the present invention. For example, in the above-described embodiment, the input value and the target value are both the power value, but may be the power amount value.

  The power supply system of the present invention can be suitably used for leveling the power consumption of each load connected to the power supply system.

DESCRIPTION OF SYMBOLS 1 Power supply system 10 Distributed power supply device 20 Control means 21 Operation | movement judgment part 22 Target value setting part 30 Input value measurement means 2 Electric power system 2A-2D Branch 3 Load 11 Junction point 31, 61 AC circuit breaker 40 AC / DC converter 50 Power output Measuring means 62 Transformer 63 DC circuit breaker

Claims (9)

A distributed power supply device connected to a branch path connected to a load from the power system, charging power from the power system, or discharging the stored power to the load,
Control means for controlling the charge and discharge of this distributed power supply device, and leveling the power received from the power system,
A power supply system comprising:
Comprising an input value measuring means for measuring an input value that is a substantial value of electric power or electric energy input to the load from the electric power system;
The power supply system, wherein the control means controls charging / discharging of the distributed power supply apparatus based on an input value measured by the input value measuring means. The control means includes
A target value setting unit for setting a target value of electric power or electric energy input to the load from the electric power system;
An operation determining unit that determines an operation to be performed by the distributed power supply device based on a difference between the input value and a target value;
The power supply system according to claim 1, further comprising:   The power supply system according to claim 2, wherein the target value setting unit changes the target value according to a time zone. A charging prohibition time zone is set in the control means,
4. The power supply according to claim 1, wherein the control unit does not cause the distributed power supply device to charge in the charge prohibition time period regardless of the determination of the operation determination unit. 5. system. A discharge inhibition time zone is set in the control means,
5. The power supply according to claim 1, wherein the control unit does not cause the distributed power supply device to discharge in the discharge prohibited time period regardless of the determination of the operation determination unit. system.   The power supply system according to any one of claims 1 to 5, wherein the control unit controls the distributed power supply device according to a predetermined schedule in the discharge inhibition time zone. An operation stop time zone is set in the control means,
The power supply system according to claim 1, wherein the control unit does not control the distributed power supply device during the operation stop time period.   The power supply according to any one of claims 2 to 7, wherein the target value setting unit sets the target value based on a plurality of input values obtained in the past 5 seconds to 1 day. system.   The power supply system according to claim 2, wherein the target value setting unit sets the target value based on a plurality of input values obtained in the past 1 to 7 days.

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