JP2022150731A - Power control system, power control method, and power control program - Google Patents

Abstract

To further stably and economically perform power control.SOLUTION: A power control method includes the steps of: setting the amount of system power used in a demand period 17 so as to minimize the amount of system power to be purchased from a power system as a target demand 16; and determining a timing of charging and discharging a storage battery in advance so that the amount of system power to be purchased during each demand period 17 becomes the target demand 16. A charging timing relative to the storage battery is determined in such a way as follows. For the demand period 17 in which the amount of system power for use becomes less than the target demand 16, a priority is given in descending order of a market price. The amount of chargeable power is integrated in an order from a demand time period of high priority. During the demand period 17 in which the amount of chargeable power is accumulated up to a time point of exceeding the amount of power required to be supplied from power source facilities, the storage battery is charged.SELECTED DRAWING: Figure 2

Description

The present invention relates to a power control system, a power control method, and a power control program that include a storage battery and control power supplied to power consumption devices.

2. Description of the Related Art In facilities such as offices and factories, power consuming devices such as electrical appliances and equipment operate with supplied power. The power consumption device is supplied with power purchased from an external power system such as a power company, power generated by natural energy, and may be further supplied with power charged in a storage battery. These electric powers are controlled so as to be stably and economically supplied.

For example, Patent Literature 1 discloses a demand cut (peak cut) in which a planned power generation amount and a target demand (peak cut amount) are obtained in advance from the predicted power amount and the rating of the storage battery. In addition, in the invention disclosed in Patent Document 1, the actual power generation amount and the demand forecast power amount are compared at the time of power control, and the difference between them is charged/discharged to/from the storage battery.

Further, Patent Literature 2 discloses a configuration for predicting a future market price (electricity price) and determining timing for charging and discharging a storage battery so as to optimize balance.

Further, Patent Literature 3 discloses a configuration that calculates the urgency level indicating the necessity of charging from information indicating a sign of a power outage such as a typhoon, and controls charge/discharge of a storage battery according to the urgency level.

WO2013/38482 JP 2015-156195 A JP 2012-235541 A

However, there is a demand for further improvements in power control stability and economy. For example, in addition to simply determining when to charge and discharge storage batteries based on market prices, when demand cuts are made, the storage batteries are charged with purchased power, and discharge accompanying demand cuts is taken into account. Therefore, it is required to optimize the charging timing.

An object of the present invention is to perform power control more stably and economically.

In order to achieve the above object, the characteristic configuration of the power control method according to one embodiment of the present invention is system power supplied from a power system in which a base rate is determined according to past power consumption and market prices fluctuate. and power source power supplied from a power supply facility including a storage battery, the power control method controlling the power supplied to a power consumption device that operates with the predicted demand power to be consumed during a first period predicted in advance. The first period is equally divided so that the amount of system power to be purchased from the power system is minimized within a range that can be covered by the system power amount purchased from the power system in consideration of the power amount of the power source power that can be supplied. a step of setting the system power amount to be used for a demand period of a predetermined length as a target demand; wherein the timing of charging the storage battery is determined in descending order of the market price for the demand period in which the system power amount used is less than the target demand. Priorities are assigned, the chargeable power amount is obtained within a range that does not exceed the target demand in each of the demand periods, and the chargeable power amounts are integrated in order from the demand period with the higher priority, and the charging is performed. It is determined to charge the storage battery in the demand period accumulated until the available power amount exceeds the power amount required to be supplied from the power supply facility.

Furthermore, the characteristic configuration of the power control program according to one embodiment of the present invention is that the basic charge is determined according to the past power consumption, and the system power supplied from the power system in which the market price fluctuates, and the power supply including the storage battery A power control program for controlling power supplied to a power consumption device operated by a source power supplied from a facility, the power control program being capable of supplying a predicted demand power amount to be consumed during a first period predicted in advance. Considering the power amount of the power source power, the first period is equally divided into a predetermined length so that the system power amount to be purchased from the power system is minimized within the range that can be covered by the system power amount to be purchased from the power system. a function of setting the system power amount used in each demand period as a target demand, and the timing of charging and discharging the storage battery so that the system power amount purchased during each of the demand periods becomes the target demand. The timing of charging the storage battery is determined in descending order of the market price with respect to the demand period in which the system power amount used is less than the target demand. The chargeable power amount is obtained in each of the demand periods within a range that does not exceed the target demand, and the chargeable power amount is integrated in order from the demand period with the highest priority to obtain the chargeable power amount. is determined to charge the storage battery in the demand period accumulated up to the point in time when the power exceeds the amount of electric power that needs to be supplied from the power supply equipment.

Furthermore, the characteristic configuration of the power control system according to one embodiment of the present invention is that the basic charge is determined according to the past power consumption, the system power supplied from the power system in which the market price fluctuates, and the power supply including the storage battery A power control system that controls the power supplied to a power consumption device that operates with the source power supplied from a facility, the power control system being capable of supplying a predicted demand power amount to be consumed during a first predicted period predicted in advance. Considering the power amount of the power source power, the first period is equally divided into a predetermined length so that the system power amount to be purchased from the power system is minimized within the range that can be covered by the system power amount to be purchased from the power system. a target demand setting unit that sets the system power amount used in the demand period as a target demand, and charging and discharging the storage battery so that the system power amount purchased during each of the demand periods becomes the target demand wherein the power supply operation planning unit determines the timing of charging the storage battery with respect to the demand period in which the system power amount used is less than the target demand , giving priority to the lowest market price, obtaining the chargeable power amount within a range not exceeding the target demand in each of the demand periods, and calculating the chargeable power amount in order from the demand period with the highest priority. The storage battery is determined to be charged during the demand period accumulated until the chargeable power amount exceeds the power amount required to be supplied from the power supply equipment.

With the configuration described above, by setting the grid power used during the demand period to be equal to or less than the target demand, it is possible to suppress the basic charge of the power grid, which is determined by the amount of power used in the past. Furthermore, even if there is a possibility that the power source will be insufficient to meet demand, the storage battery can be charged efficiently and economically in advance, enabling more stable and economical power control. be able to.

In addition, a power consumption measurement unit that measures a unit system power amount that is the system power amount consumed in each second period into which the demand period is divided; Prediction is made based on the unit system power amount, and if the predicted system power amount is equal to or less than the target demand, the power amount supplied from the power supply facility is maintained, and the predicted system power amount reaches the target a power source power adjustment unit that increases the amount of power supplied from the power supply facility when the demand is greater than the demand; and when the amount of power supplied from the power supply facility is increased, the increased power amount and the It is preferable to include a charging correction unit that corrects the timing of charging the storage battery according to market price fluctuations.

With such a configuration, by controlling the charging and discharging of the storage battery so as to make up for the shortage of the grid power with respect to the amount of power (demand) actually consumed (required) by the power consuming device, the power supply can be stabilized. power can be supplied

and a server-side power control unit capable of data communication with the local-side power control unit, wherein the local-side power control unit includes the power source. The power adjustment unit, the charging correction unit, and the power consumption measurement unit may be provided, and the server-side power control unit may be provided with the target demand setting unit and the power operation planning unit.

With such a configuration, basic power control can be performed by the server-side power control unit, and individual and detailed power control can be performed by the local-side power control unit, so that power control can be performed efficiently.

Also, each time the demand period elapses, the target demand in the first period may be set with the elapsed time as a starting point.

With such a configuration, the target demand is continuously reviewed, and power control can be performed stably while suppressing the basic charge more appropriately.

Further, the power supply equipment may include a natural energy power generation device, and the power generated by the natural energy power generation device may be supplied to the power consumption device or the storage battery.

With such a configuration, since the natural energy power generation device is used in addition to the storage battery as the power supply equipment, the degree of freedom of the supply source of the power supplied to the power consumption device is increased, and the power supplied to the power consumption device can be controlled. can be performed more efficiently and stably.

The power supply operation planning unit further includes an input reception unit that receives information input by a user, and a power failure possibility prediction unit that predicts the possibility of a system power failure in which the power supply from the power system stops. When the power outage possibility prediction unit predicts that the system power outage may occur, referring to the instruction from the user received by the input reception unit, if there is a possibility of the system power outage, the If the user does not desire to accelerate the charging of the storage battery, the storage battery is charged in the normal mode, and if the user desires to accelerate the charging of the storage battery, It is preferable to charge the storage battery in a charge promotion mode in which charging of the storage battery is promoted more than in the normal mode.

With such a configuration, when there is a possibility of a system power failure, the charging acceleration mode can be set and the storage battery can be controlled to be charged before the power failure occurs, so that the storage battery has a surplus capacity. It is possible to stably supply electric power to the electric power consuming devices even if a system blackout occurs.

FIG. 2 is a diagram illustrating a configuration for supplying power to a power consuming device; It is a figure explaining a demand cut. It is a figure explaining the fine adjustment of the power supply electric power in a demand cut. FIG. 4 is a diagram illustrating the configuration of a local power control unit; It is a figure which illustrates the structure of a server side power control part. FIG. 4 is a diagram illustrating a processing flow of power supply control; It is a figure explaining charge arbitrage.

[Power supply configuration]
First, referring to FIG. 1, a configuration for supplying power to the power consumption device 3 will be described. FIG. 1 is a diagram showing a configuration for supplying power and a configuration for controlling power as a configuration example including a power control system.

As shown in FIG. 1 , power consumption device 3 is connected to AC line 2 that is connected to power system 1 . A first connection point 4 and a second connection point 5 are arranged in that order toward the downstream side when viewed from the connection point of the power system 1 to the AC line 2, and the power generator 8 is connected to the first connection point 4. , and the power consumption device 3 is connected to the second connection point 5 . The generator 8 can supply the generated power Pg to the AC line 2 .

A charging/discharging device 20 is connected to the AC line 2 . The charging/discharging device 20 has a charging/discharging unit 23 that charges/discharges power to/from the AC line 2 and a charging/discharging control unit 21 that controls the operation of the charging/discharging unit 23 .

As shown in FIG. 1, in this embodiment, the power P7 in the direction from the first connection point 4 to the second connection point 5 is regarded as positive power. Further, as the received power Pb received by the charging/discharging device 20 from the AC line 2, the charging power from the AC line 2 by the charging/discharging device 20 is regarded as positive received power Pb, and the discharging power to the AC line 2 by the charging/discharging device 20 is regarded as the negative received power Pb. Therefore, in FIG. 1 , the received power Pb is indicated by an arrow pointing from the AC line 2 toward the charging/discharging device 20 . Note that the charging/discharging device 20 and the power generation device 8 are one type of power supply equipment. Also, the negative received power Pb, which is the discharged power, and the generated power Pg of the power generator 8 are both referred to as source power. That is, the AC line 2 is supplied with power from the power system 1 and the power supply equipment.

Thus, power is supplied to the AC line 2 from at least one of the power generator 8 and the charging/discharging unit 23 as power supply equipment, and the power system 1 . Note that the AC line 2, the charging/discharging device 20, the power consumption device 3, the power generation device 8, etc. are installed in the same facility (for example, a house or business office), etc., and are attached to the power consumption device 3 on a local side. It is controlled by the power control unit 30 .

The instrument current transformer 7 is provided between the first connection point 4 and the second connection point 5 in the middle of the AC line 2, and the current value of the power flowing from the first connection point 4 to the second connection point 5 is to measure

The instrument transformer 15 is provided on the upstream side (on the power system 1 side) of the first connection point 4 in the middle of the AC line 2, and measures the voltage value of the power there. By monitoring the voltage value measured by voltage transformer 15 , charging/discharging device 20 can determine whether or not a system blackout, in which power supply from power system 1 is stopped, has occurred.

The power generation device 8 is of a type that includes a natural energy power generation device that uses renewable energy such as a solar power generation device, a power generation device that includes a fuel cell, or an engine and a power generator driven by the engine. It can be realized by using a power generator or the like.

The charging/discharging device 20 has a charging/discharging unit 23 including a storage battery 25 that charges/discharges power to/from the AC line 2 and a charging/discharging control unit 21 that controls the operation of the charging/discharging unit 23 . A storage battery 25 included in the charge/discharge unit 23 is connected to the AC line 2 via the power conversion unit 24 . As a result, in the charging/discharging device 20 , the electric power stored in the storage battery 25 is converted into electric power of desired voltage, frequency, and phase, and output to the AC line 2 . The storage battery 25 can be configured using, for example, a secondary battery such as a lithium ion battery, and may be any power storage device capable of storing electric power. The charge/discharge control unit 21 controls the operation of the power conversion unit 24 to control output power (discharge power) from the storage battery 25 to the AC line 2 and input power (charge power) from the AC line 2 to the storage battery 25. control and perform.

The power system 1 supplies system power purchased from a power company or the like to the AC line 2 . The grid power charge is determined according to the amount of power used, based on a predetermined basic charge and a market price that changes on a daily basis or a unit time basis. The market price is determined by the Japan Electric Power Exchange (JEPX) according to the power demand in the power system 1 as a whole. The basic charge is set for each facility according to the amount of power used during a predetermined period in the past. Specifically, in each facility, the basic charge for each facility is set according to the maximum power consumption (maximum demand) of the monthly power consumption for the past one year as a predetermined period.

In other words, the market price is determined by the amount of power used by the entire power system, but the basic charge is determined by the amount of power used in the past by the facility. Basic charges can be reduced.

[Demand cut]
Next, a demand cut for reducing the maximum demand will be described using FIGS. 2 and 3 while referring to FIG. Demand cut sets a demand period 17, which is a predetermined period, and determines a target demand 16, which is the maximum value of the amount of grid power (system power amount) used by the power consumption device 3 in each demand period 17. is. The target demand 16 predicts the amount of power that can be supplied from the power supply so that the amount of power (demand) consumed by the power consumption device 3 exceeds the target demand 16 in each demand period 17 so that the power can be covered by the power supply. is set as

For example, the demand period 17 is set to 30 minutes, and the target demand 16 that is commonly applied to each demand period 17 up to 24 hours ahead is set.

At this time, first, the power consumption for each 30 minutes (demand period 17) for the next 24 hours (corresponding to the "first period") is predicted from the past power consumption of the power consumption device 3 . The total power consumption expected to be consumed by the power consuming device 3 in 24 hours is referred to as the predicted power demand 51 (see FIG. 5).

Next, the amount of power supply power that can be supplied in 24 hours is predicted. The amount of power source power includes the amount of power generated by the power generation device 8 such as a solar power generation device and the amount of discharge power that can be discharged from the storage battery 25 . In other words, as the amount of power that can be supplied from the power source, the amount of power that can be generated by the solar power generation device in 24 hours is predicted from information such as the weather, and the amount of power currently stored in the storage battery 25 and the rating of the storage battery 25 are calculated. , the amount of discharge power that can be discharged is calculated. The rating of the storage battery 25 is the amount of power that can be charged by the storage battery 25, the amount of power that can be charged/discharged per unit time, and the like.

Then, the system power amount used in each demand period 17 is set to the target demand 16 so that the system power amount purchased from the power system 1 is minimized within the range that can cover the demand forecast power amount 51 consumed in 24 hours. is set as That is, in each demand period 17 up to 24 hours ahead, the amount of power consumed by the power consumption device 3 is the power amount 18 of the generated power Pg of the power generation device 8, the power amount 19 of the discharged power of the storage battery 25, and the target demand A target demand 16 is set in consideration of the power generated by the generator 8 and the power source, which is the discharged power of the storage battery 25, so that the combined value of the power amount corresponding to 16 can be covered.

In this way, the target demand 16 is set, and in each demand period 17, while suppressing the system power purchased (received) from the power system 1 to the target demand 16 or less, the power supply power is set so that the demand forecast power amount 51 can be covered. By controlling the amount of supply, it is possible to minimize the amount of grid power used and reduce the basic rate. The target demand 16 may be set every 30 minutes, based on the predicted value of power consumption for the next 24 hours. That is, the target demand 16 may be set over the first period each time the demand period 17 elapses. As a result, power control can always be performed at the optimum target demand 16 .

Furthermore, in the demand cut, as shown in FIG. 3, the power supply amount is finely adjusted in real time according to the actual grid power consumption 26 so that the target demand 16 can be maintained in each demand period 17. be.

Specifically, first, a grid power transition 27 is calculated by linearly approximating the time transition of the grid power consumption such that the grid power consumed in the demand period 17 becomes the target demand 16 .

Next, a unit period (corresponding to a "second period") 17a obtained by dividing the 30-minute demand period 17, for example, the amount of system power actually supplied from the power system 1 (power consumption device 3 ) is measured as the unit system power amount 28 .

Then, in each unit period 17a, the unit system power amount 28 and the system power transition 27 are compared. The amount of power supplied to the power supply is increased to reduce the consumption amount 29 of the system power after adjusting the system power amount.

When the unit system power amount 28 is larger than the system power amount corresponding to the unit period 17a in the system power transition 27, there is a high possibility that the system power amount finally supplied during the demand period 17 will exceed the target demand 16. Become. Therefore, by increasing the power supply amount and reducing the system power amount, the system power amount supplied in the demand period 17 is suppressed from exceeding the target demand 16, and the target demand 16 can be maintained. can.

It should be noted that such fine adjustment of power supply power may be performed after a predetermined period of time, for example, 5 minutes, has elapsed from the beginning of each demand period 17 . This is because at the beginning of the demand period 17 it is difficult to predict the actual consumption over the final demand period 17 . In other words, even if the amount of grid power used in the beginning of the demand period 17 is larger than planned, the consumption may eventually fall below the target demand 16 .

[Power control system]
1 to 7, the power control system will be mainly described, as well as the power control method and the power control program. In the following description, as an example of power supply equipment, a power generation device 8 and a storage battery 25 (charge/discharge device 20) are provided, and the power generation device 8 is a solar power generation device.

As shown in FIG. 1 , the power control system controls system power and source power supplied to the power consumption device 3 . The power control system includes a power consumption device 3, a power system 1 that supplies power to the power consumption device 3, a power generation device 8, a charging/discharging device 20, an information input/output device 12, a local side power control unit 30, and a server-side power control unit 9 . The local-side power control unit 30 and the server-side power control unit 9 cooperate to perform demand cut, and control power purchase from the power system 1 , charge/discharge of the storage battery 25 , and power generation of the power generator 8 . The server-side power control unit 9 is provided on a communication line 10 such as the Internet, and is connected to a plurality of local-side power control units 30 and the like via the communication line 10 . In other words, the server-side power control unit 9 is a component of a plurality of power control systems, and performs power control related to a plurality of power consumption devices 3 .

(Local side power control unit)
As shown in FIG. 4 , the local power control unit 30 includes a control unit 31, a communication unit 32, a power outage possibility prediction unit 11, a comparison unit 35, a power source power adjustment unit 37, and a charge correction unit 38. , and a storage unit 39 .

The controller 31 includes a processor such as a CPU, and controls the operation of each functional block of the local power controller 30 . The control unit 31 also controls the operation of the charge/discharge control unit 21 of the charge/discharge device 20 to control charging/discharging of the storage battery 25 .

The communication unit 32 performs information communication between the power generation device 8 , the charging/discharging device 20 , the information input/output device 12 , the server-side power control unit 9 , and each functional block of the local-side power control unit 30 .

The power outage possibility prediction unit 11 acquires information such as the weather and predicts the possibility of power outage in the power system 1, as will be described later.

The comparison unit 35 compares the system power transition 27 and the unit system power amount 28 for each unit period 17 a in each demand period 17 .

The power supply adjusting section 37 adjusts the power supply power according to the comparison result of the comparing section 35 . Specifically, when the comparison result shows that the unit system power amount 28 is equal to or less than the system power transition 27, the power supply adjustment unit 37 maintains the power amount supplied from the power supply equipment, If it is greater than the power transition 27, the amount of power supplied from the power supply facility is increased.

When the amount of power supplied from the power supply equipment is increased by the power supply adjustment unit 37, the charging correction unit 38 adjusts the timing of charging the storage battery 25 according to the increased amount of power and fluctuations in the market price of grid power. correct.

When the amount of power supplied from the power supply facility is increased by the power supply adjustment unit 37, the possibility that the supply amount of the power supply planned when setting the target demand 16 will be insufficient increases. Therefore, it is necessary to charge the storage battery 25 in order to secure the necessary amount of power from the power supply. At this time, the storage battery 25 may be charged with the generated power Pg if there is a surplus in the generated power Pg of the power generator 8. The storage battery 25 needs to be charged. In addition, the market price of the system power of the power system 1 changes moment by moment. Therefore, the charging correction unit 38 charges the storage battery 25 with the power necessary to cover the predicted demand power amount 51 (see FIG. 5), while increasing the power amount and the system power so as to minimize the power purchase price. The charging timing for the storage battery 25 is corrected according to fluctuations in the market price of electric power.

The storage unit 39 stores information acquired via the communication unit 32 and various data generated by the local power control unit 30, and outputs the data as necessary.

(Server side power control unit)
As shown in FIG. 5, the server-side power control unit 9 includes a control unit 41, a communication unit 42, a target demand setting unit 44, a power operation planning unit 45, a power transition detection unit 47, and a power consumption measurement unit. 48 and a storage unit 49 .

The control unit 41 has a processor such as a CPU, and controls the operation of each functional block of the server-side power control unit 9 .

The communication unit 42 performs information communication between the power generation device 8 , the charging/discharging device 20 , the information input/output device 12 , the local power control unit 30 , and each functional block of the server power control unit 9 .

The target demand setting unit 44 sets the target demand 16 in the demand period 17 from the demand forecast power amount 51 for a predetermined period (first period) and the power amount of the power source power that can be supplied in order to cut the demand. do.

In order to maintain the target demand 16, the power supply operation planning unit 45 charges the storage battery 25 (charging/discharging unit 23) according to the amount of electric power that needs to be supplied from the power supply facility and the fluctuation of the market price. Determines when to discharge from

The power transition detection unit 47 calculates a grid power transition 27 by linearly approximating the time transition of the consumption of the grid power such that the grid power consumed during the demand period 17 becomes the target demand 16 .

The power consumption measurement unit 48 measures a unit system power amount 28 that is the system power amount consumed by the power consumption device 3 for each unit period (second period) 17a into which the demand period 17 is arbitrarily divided. In other words, the unit system power amount 28 is the system power amount supplied from the power system 1 in the unit period 17a. Note that the unit period 17a may be a period obtained by dividing the demand period 17 equally.

The storage unit 49 stores information acquired via the communication unit 42 and various data generated by the server-side power control unit 9, and outputs the data as necessary.

(Possibility of blackout prediction)
As shown in FIG. 1, the power control system has an information input/output device 12 . Moreover, as shown in FIG. 4 , the local power control unit 30 includes a power failure possibility prediction unit 11 . The information input/output device 12 and the power outage possibility prediction unit 11 perform power outage possibility prediction, and power control is performed according to the power outage possibility prediction.

As shown in FIG. 1, the information input/output device 12 includes an output unit 13 for outputting information to a user, and an input reception unit 14 having a plurality of switches for receiving information input by the user. The information input/output device 12 can transmit and receive information to and from the charging/discharging device 20 . Methods of outputting information by the output unit 13 include output of voice information, output of text information, and the like. Further, the output unit 13 and the input reception unit 14 may be integrally provided using a touch panel type display device. For example, the information input/output device 12 can be realized by using a remote control device installed for displaying the operation state of the charging/discharging device 20 and the power generation device 8 and setting the operation. Alternatively, the information input/output device 12 can be implemented using a communication terminal device or the like used by the user.

A blackout possibility prediction unit 11 shown in FIG. 4 predicts the possibility of occurrence of a power blackout in which the power supply from the power system 1 stops in the area where the charging/discharging device 20 is installed. The power outage possibility prediction unit 11 collects information on, for example, weather, disasters, electrical work, events, and the like.

The power outage possibility prediction unit 11 predicts the possibility of a power outage in the area where the charging/discharging device 20 is installed, the predicted time of occurrence of the power outage, and the like, at a predetermined timing such as the hour.

For example, the power outage possibility prediction unit 11 collects information on the predicted course of a typhoon and the range of the storm area of the typhoon as weather information. Then, if the area where the charging/discharging device 20 is installed is predicted to be included in the storm area of a typhoon in the future, the blackout possibility prediction unit 11 determines that there is a high possibility of occurrence of a system blackout. If it is predicted that the storm will not be included in the storm area in the future, it is determined that the possibility of a power outage is low.

Then, when power failure possibility prediction unit 11 predicts that there is a high possibility of a system power failure occurring in an area where charging/discharging device 20 is installed, power failure possibility prediction unit 11 provides information to that effect to charging/discharging device 20 and control unit 31. introduce. Power failure possibility prediction unit 11 may also transmit the predicted time of occurrence of a system power failure to charging/discharging device 20 and control unit 31 together.

The charge/discharge control unit 21 or the control unit 31 performs control mode setting processing for setting the control mode of the charge/discharge unit 23, and performs charge/discharge control of the charge/discharge unit 23 according to the set control mode. In the present embodiment, in the control mode setting process, the charge/discharge control unit 21 or the control unit 31 sets the control mode of the charge/discharge unit 23 to the normal mode and the charge/discharge in the normal mode when a power failure has not occurred. Either one of a charging promotion mode in which charging of the charging/discharging unit 23 is promoted more than when the operation of the charging/discharging unit 23 is controlled is set.

With such a configuration, even if a system power outage occurs and system power is not supplied to the power consumption device 3, the charging of the charging/discharging unit 23 is promoted, and the charging power of the storage battery 25 has a margin. The power supply to the power consuming device 3 can be maintained by discharging from the storage battery 25 .

(power control)
Next, a power control configuration by the above power control system will be described. In the following description, a configuration for performing power control using the above power control system will be described, but the power control method shown in the flow below may be implemented using any device configuration. Also, part or all of the device configuration of the power control system may be realized by software. In this case, the program is stored in an arbitrary storage device such as the storage section 39 or the storage section 49, and executed by an arbitrary processor (computer) mounted in the control section 31 or the control section 41 or the like.

As described above, the power consuming device 3 is supplied with power from the power system 1 and the power supply facility. In the following example, the power supply equipment includes a charge/discharge device 20 having a storage battery 25 and a solar power generation device as the power generation device 8 . Power control controls power purchase from the power system 1, charging and discharging of the storage battery 25, and power generation operation of the solar power generation device in order to control the power supplied to the power consumption device 3. FIG.

When controlling power, first, a demand forecast power amount 51 that will be consumed by the power consumption device 3 during a predetermined period, for example, 24 hours from the current time is predicted based on past power consumption records (see FIG. 6). step #1).

The demand forecast power amount 51 is predicted, for example, from transitions in the power consumption of the power consumption device 3 over the past year, and may also be taken into account by arbitrarily combining the season, date and time, day of the week, temperature, weather, and the like. . Also, the demand forecast power amount 51 may be predicted using a learned model obtained by machine-learning temperature, day of the week, past demand data, etc. using artificial intelligence or the like. The predicted power demand amount 51 is predicted by an arbitrary functional block such as the target demand setting section 44 of the server-side power control section 9 and stored in the storage section 49 .

Next, the target demand setting unit 44 reads out the predicted demand power amount 51 stored in the storage unit 49, and purchases from the power system 1 within a range that can cover the predicted demand power amount 51 from the power amount of the suppliable power source power. The system power amount used in the demand period 17 is set as the target demand 16 so that the system power amount to be used is minimized, and demand cut is performed (step #2 in FIG. 6). The set target demand 16 is stored in the storage unit 49 and is read as needed during power control.

The amount of power that can be supplied depends on the amount of power stored in the storage battery 25, the power generation state of the solar power generation device, weather forecasts such as temperature, amount of solar radiation, and weather, and the power generation prediction of the solar power generation device based on past power generation conditions. Considered and predicted. As a result, the amount of power expected to be consumed by the power consumption device 3 in each demand period 17 is expected to be covered by the system power below the target demand 16 and the source power.

At this time, even if the amount of power purchased from the power system 1 (system power amount) in each demand period 17 is set to be equal to or less than the target demand 16, the power supply operation planning unit 45 does not have enough power supply power to cover the demand forecast power amount 51. As prepared, the charging timing and charging amount of the storage battery 25 and the discharging timing and discharging amount of the storage battery 25 are determined (step #3 in FIG. 6).

As a result, in each demand period 17, the shortage of the demand of the power consuming device 3 in the state where the system power is supplied within the range of the target demand 16 can be appropriately compensated for by the source power. After such preparations are made in advance, the power consumption device 3 operates while performing a demand cut.

Here, even when power control is performed while demand cut is being performed, a system power failure may occur. Therefore, even during demand cut, if there is a high possibility of a system power outage, it is necessary to additionally charge the storage battery 25 in order to maintain the power supply to the power consumption device 3 .

Therefore, during execution of demand cut (during execution of power supply control), the possibility of continuous power failure is judged, and according to the judgment result, power supply to the power consumption device 3 is maintained while maintaining the target demand 16 In order to maintain the power supply, the control mode of the storage battery 25 is changed from the normal mode to the charge promotion mode, the power supply plan is changed, and additional charging is performed.

First, the blackout possibility prediction unit 11 continuously obtains information such as the predicted course of the typhoon, and predicts the possibility of a grid blackout occurring in the power system 1 that supplies grid power to the power consumption device 3. Predict whether it is equal to or greater than the probability. The power failure possibility prediction unit 11 determines that a power failure may occur when the possibility of a power failure occurring is equal to or higher than a predetermined probability (step #4 in FIG. 6).

If it is determined that there is a possibility that a system power failure will occur (step #4 Yes in FIG. 6), the control unit 31 refers to the user's instruction received by the input reception unit 14, and if the instruction from the user It is determined whether or not the user desires to promote charging to (step #5 in FIG. 6).

If the user's instruction is to promote charging of the storage battery 25 (step #5 Yes in FIG. 6), the control unit 31 causes the storage battery 25 control mode is changed from the normal mode to the charge promotion mode (step #6 in FIG. 6).

By setting the control mode of the storage battery 25 to the charge promotion mode, the charging of the storage battery 25 is promoted, and the charging rate of the storage battery 25 can be maintained at a high state at all times. By discharging from the storage battery 25, power supply to the power consumption device 3 can be maintained.

If it is not determined that there is a possibility that a power outage will occur (step #4 No in FIG. 6), if the instruction from the user does not wish to promote charging of the storage battery 25 (step #4 in FIG. 6 #5 No), and after the control mode of the storage battery 25 is changed to the charge promotion mode (step #6 in FIG. 6), power control accompanying the following demand cut is performed, and a power outage is possible at any time even during power control. Prediction of gender (processing of steps #4 to #6 in FIG. 6) is performed.

During execution of the demand cut, the supply amount of the power supply power is finely adjusted according to the actual consumption amount 26 of the system power.

At this time, first, the power transition detection unit 47 linearly approximates the target demand 16 to the grid power transition 27 in the demand period 17 (step #7 in FIG. 6). That is, the power transition detection unit 47 performs linear approximation on the assumption that the grid power is evenly consumed during the demand period 17 so that the consumption of the grid power in the demand period 17 becomes the target demand 16. The transition 27 is calculated and stored in the storage unit 49 and stored in the storage unit 39 via the communication unit 42 and the communication unit 32 .

Next, the power consumption measurement unit 48 measures the actual system power consumption 26 in the power consumption device 3 (step #8 in FIG. 6). Specifically, each demand period 17 is divided into unit periods 17a. The data is stored and stored in the storage unit 39 via the communication unit 42 and the communication unit 32 . For example, the unit period 17a is a 1-minute period into which the demand period 17 of 30 minutes is divided. That is, the power consumption measurement unit 48 measures the unit system power amount 28 every minute.

Next, the comparison unit 35 compares whether or not the unit system power amount 28 is below the system power transition 27 (step #9 in FIG. 6). That is, in each unit period 17a, the comparison unit 35 compares whether or not the unit system power amount 28 is equal to or less than the system power amount in the unit period 17a of the system power transition 27. FIG.

If the unit system power amount 28 is equal to or less than the system power transition 27 , the target demand 16 is achieved in the demand period 17 if the system power is consumed with the transition as it is. Therefore, when the unit system power amount 28 is equal to or less than the system power transition 27 (step #9 Yes in FIG. 6), the charging/discharging timing of the storage battery 25 determined by the power supply operation planning unit 45 is maintained, and the process continues ( Step #13 in FIG. 6).

When the unit system power amount 28 becomes larger than the system power transition 27, if the system power is consumed with the transition as it is, the system power amount consumed by the power consumption device 3 may exceed the target demand 16 in the demand period 17. There is Therefore, when the unit system power amount 28 is not equal to or less than the system power transition 27 (step #9 No in FIG. 6), the power amount exceeding the target demand 16 can be compensated by discharging from the storage battery 25. , the charging/discharging timing and charging/discharging amount of the storage battery 25 determined by the power supply operation planning unit 45 are corrected.

When correcting the charging/discharging timing, first, the charge correction unit 38 confirms whether or not the storage battery 25 is fully charged (step #10 in FIG. 6).

When the storage battery 25 is fully charged (Yes in step #10 of FIG. 6), the charging correction unit 38 increases the amount of electric power discharged from the storage battery 25 so that the system electric amount exceeds the target demand 16. The amount of power is compensated (step #11 in FIG. 6), and the power control accompanying the demand cut is continued (step #13 in FIG. 6). Note that even if the storage battery 25 is not fully charged (step #10 No in FIG. 6), the charge correction unit 38 detects the power corresponding to the power amount in which the system power amount exceeds the target demand 16 during the demand period 17. It is also possible to check whether or not enough power is stored in the storage battery 25 to compensate for the amount, and increase the amount of power discharged from the storage battery 25 when it is confirmed that sufficient power is stored.

If the storage battery 25 is not fully charged (step #10 No in FIG. 6), the charging correction unit 38 first determines that the system power amount exceeds the target demand 16 during the demand period 17 or by 24 hours later. It is confirmed whether or not the storage battery 25 has enough power to compensate for the amount of power. Then, when the power stored in the storage battery 25 is insufficient, the power system 1 supplies the power amount corresponding to the power amount in which the system power amount exceeds the target demand 16 with the power amount stored in the storage battery 25. Electricity is purchased and the storage battery 25 is charged.

In this way, even if the amount of power actually consumed by the power consuming device 3 exceeds the prediction in each demand period 17, the amount of power discharged from the storage battery 25 is increased, thereby reducing the use of grid power. The amount can be kept below the target demand 16. In addition, since the amount of discharge of the storage battery 25 increases, there is a possibility that the amount of power stored in the storage battery 25 will be insufficient. can be secured.

At this time, the charging correction unit 38 executes charging arbitrage for the purchased power from the power system 1 for charging the storage battery 25 (step #12 in FIG. 6). Then, while securing the charge amount of the storage battery 25 at an appropriate timing, the charge correction unit 38 increases the amount of electric power discharged from the storage battery 25, and the amount of electric power corresponding to the amount of electric power in which the system electric amount exceeds the target demand 16. (step #11 in FIG. 6). In the charging arbitrage, when it is decided to purchase power from the power grid 1 to charge the storage battery 25, charging is not performed immediately, and the required amount of power is determined by the power grid 1 in consideration of the market price of the power grid 1. 1 to charge the storage battery 25, and to plan so that the power purchase price is the lowest.

When it is decided to purchase power from the power system 1 to charge the storage battery 25, the predicted value of the amount of power actually consumed by the power consumption device 3 may tend to decrease. In such cases, it is expected that the amount of power consumed will fall below the target demand 16 in the future. Moreover, when the actual consumption exceeds the target demand 16, it is necessary to cover the consumption exceeding the target demand 16 with power supply power. In such a state, there is a possibility that sufficient electric power for charging the storage battery 25 cannot be secured. Also, if the market price is on a downward trend, it is expected that the market price will fall in the future, so it is more economical to purchase power after the market price has fallen and then charge the storage battery 25 instead of purchasing power immediately. It is advantageous to Therefore, in the charging arbitrage, the timing of charging the storage battery 25 by purchasing power from the power system 1 is planned in consideration of the storage state of the storage battery 25, the predicted amount of power consumed by the power consumption device 3, and the market price. be done.

Specifically, when the predicted power consumption 51 is predicted in advance, the predicted amount of power consumed by the power consumption device 3 is calculated for each demand period 17, and the predicted power consumption for each demand period 17 is calculated. It is stored in the storage unit 39 as the quantity 52 . Also, the market price transition (market price transition) 53 of the electric power system 1 is acquired and stored in the storage unit 39 .

When it is decided to purchase power from the power system 1 to charge the storage battery 25, the charge correction unit 38 calculates the predicted power consumption 52 and the target demand 16 for each demand period 17 up to 24 hours (first period) ahead. , and a demand period 17 in which the predicted power consumption 52 is smaller than the target demand 16 is extracted.

In the example shown in FIG. 7, the demand periods 17 in which the predicted power consumption 52 is smaller than the target demand 16 are demand periods A, B, C, D, E, and the like.

Next, the charging correction unit 38 obtains the amount of electric power that can be charged to the storage battery 25 within the range that does not exceed the target demand 16 in each of the demand periods 17 as the chargeable electric amount 54 . For example, the chargeable power amount 54 is calculated as the difference between the predicted power consumption amount 52 and the target demand 16 in each of the demand periods A, B, C, D, E, and the like. The charge correction unit 38 stores the calculated chargeable power amount 54 in the storage unit 39 in association with the demand period 17 .

Next, the charging correction unit 38 prioritizes the demand periods A, B, C, D, E, etc., for which the predicted power consumption 52 is smaller than the target demand 16 from the market price transition 53 in descending order of market price. Give. In the example shown in FIG. 7, the order of priority is demand periods D, E, C, B, and A. In the example shown in FIG.

Next, the charge correction unit 38 calculates the amount of electric power required to additionally charge the storage battery 25 in order to maintain the target demand 16 . In other words, the charging correction unit 38 calculates the amount of additional charging to the storage battery 25 . The additional charging amount may be the amount of electric power required until the storage battery 25 is fully charged.

Next, the charging correction unit 38 accumulates the respective chargeable power amounts 54 in order of the demand periods D, E, C, B, and A with the highest priority until the additional charge amount is exceeded. The demand period 17 accumulated until the additional charging amount is exceeded becomes the demand period 17 used for additional charging.

For example, if the chargeable power amount 54 in the demand periods D, E, and C is integrated and exceeds the additional charge amount, the charge correction unit 38 stores the grid power purchased in the demand periods C, D, and E in the storage battery 25 The charging/discharging timing and charging/discharging amount for the storage battery 25, which are determined by the power supply operation planning unit 45, are corrected so that the storage battery 25 is charged to . Furthermore, the charge correction unit 38, along with this correction, generally reviews the charging/discharging timing and charging/discharging amount of the storage battery 25 determined by the power supply operation planning unit 45 so that the demand cut can be performed with higher accuracy. You can do it.

Even when charging the storage battery 25 by purchasing power from the power system 1 as the discharge amount of the storage battery 25 increases, the battery 25 can be charged at the optimum timing considering the amount of power that can be stored in the storage battery 25 and the market price. By controlling to purchase electricity, it is possible to purchase electricity economically while ensuring a sufficient amount of electricity stored in the storage battery 25 .

Subsequently, the processing from step #7 or step #4 onwards is repeated to perform power control accompanied by demand cut in each demand period 17 (step #13 in FIG. 6).

[Another embodiment]
(1) In the above-described embodiment, the configuration including the solar power generation device, which is the power generation device 8, and the storage battery 25 as the power supply facility was described as an example, but the power supply facility includes the power generation device 8 such as the solar power generation device. The configuration may be such that it is not provided. Further, the power generation device 8 is not limited to the solar power generation device, and one or a plurality of all kinds of power generation devices 8 such as other natural energy power generation devices and power generation devices including fuel cells may be used. In other words, as the power supply equipment, any one of various power generation devices 8 and storage batteries 25 may be used in combination. Then, in the demand cut, the target demand 16 is set so that the shortage of the target demand 16 of the grid power with respect to the power consumed by the power consumption device 3 in each demand period is compensated for by the power supplied from these power supply facilities. is set and power control is performed.

In this way, even in a configuration in which power is supplied from various power supply facilities, it is possible to appropriately cut demand and optimize the basic charge for grid power.

(2) In each of the above embodiments, the power failure possibility prediction unit 11, the comparison unit 35, the power source power adjustment unit 37, and the charge correction unit 38 are provided in the local power control unit 30, and the target demand setting unit 44, the power supply operation planning unit 45, the power transition detection unit 47, and the power consumption measurement unit 48 are not limited to the configuration provided in the server-side power control unit 9, and these functional blocks are It may be provided in either the control unit 30 or the server-side power control unit 9 , and may be provided across the local-side power control unit 30 and the server-side power control unit 9 . For example, the power consumption measurement unit 48 may be provided in the local power control unit 30 instead of the server power control unit 9 . Furthermore, the local-side power control unit 30 or the server-side power control unit 9 may not be provided, and all of these functional blocks may be provided in either the local-side power control unit 30 or the server-side power control unit 9 .

Such a configuration improves the degree of freedom in configuration of the power control system.

(3) In each of the above embodiments, the demand period 17 is not limited to 30 minutes and may be set to any time. Also, the demand cut is not limited to the configuration of setting the target demand 16 up to 24 hours ahead, and may be configured to set the target demand 16 up to an arbitrary time ahead. Also, the unit period 17a is not limited to one minute, and may be set to an arbitrary period of time, and may not be evenly spaced.

As a result, it is possible to appropriately cut demand according to the power supply configuration and the power usage/consumption configuration, thereby optimizing the basic charge of grid power.

(4) In each of the above embodiments, charging arbitrage may also be performed when the power supply operation planning unit 45 determines the charging timing and charging amount of the storage battery 25 and the discharging timing and discharging amount of the storage battery 25. . Specifically, in each demand period 17, the power supply operation planning unit 45 adjusts the generated power Pg of the photovoltaic power generation device so as to compensate for the shortage of the target demand 16 with respect to the demand forecast power amount 51 with the power amount of the power supply power. In addition to the control of use, the charging and discharging timing of the storage battery 25 is determined, and the charging of the storage battery 25 is performed in a time zone (demand period 17) when the purchased power amount (demand) is smaller than the target demand 16 and the market price is low. Thus, the charging timing and charging amount of the storage battery 25 are determined.

By demand cut, the target demand 16 in each demand period 17 is determined, and the shortage of the demand is covered by the power supply, but the storage battery 25 may need to be charged in order to meet the supply of power. . This charging is performed during the demand period 17 when the amount of power consumed by the power consuming device 3 is equal to or less than the target demand 16, but by performing charging arbitrage, charging can be performed during the demand period 17 when the market price is low. , the charging of the storage battery 25 can be performed at an appropriate timing.

(5) In each of the above embodiments, the comparison unit 35 linearly approximates the target demand 16 to obtain the grid power transition 27, and determines whether the grid power consumed during the demand period 17 is equal to or less than the target demand 16. were compared, but are not limited to such a configuration. For example, the comparison unit 35 measures the unit system power amount 28 in a plurality of unit periods 17a, linearly approximates them, predicts the system power amount consumed during the demand period 17, and compares it with the target demand 16. Also good. Furthermore, without providing the comparison unit 35, the power supply power adjustment unit 37 checks whether the grid power consumed during the demand period 17 in an arbitrary configuration is equal to or less than the target demand 16, and according to the check result, You may adjust the electric energy supplied from power supply equipment.

As a result, it is possible to adjust the amount of electric power supplied from the power supply equipment with an appropriate configuration according to the situation.

(6) In each of the above embodiments, charging arbitrage may also be performed when charging the storage battery 25 in the charging promotion mode.

As a result, even in the charge promotion mode, the power purchase for charging the storage battery 25 can be efficiently and economically performed.

Conversely, charging arbitrage is performed only when charging the storage battery 25 in the charge promotion mode, and when correcting the charging timing for the storage battery 25 when the unit system power amount 28 is greater than the system power transition 27, charging Arbitrage does not have to be performed.

(7) In each of the above embodiments, the charging arbitrage is control in which charging is performed during the demand period 17 when the market price is low among the demand periods 17 when the amount of power consumed by the power consumption device 3 is equal to or less than the target demand 16. However, if the amount of charge in the storage battery 25 is insufficient in the near future, in the most recent demand period 17 in which the amount of power consumed by the power consumption device 3 is equal to or less than the target demand 16, charging is performed until the required amount of charge can be secured. may be performed. For example, during a demand period 17 in which the amount of power consumed by the power consuming device 3 next exceeds the target demand 16, the amount of electricity stored in the storage battery 25 may be insufficient for the amount of discharge after the demand period 17. When predicted, the storage battery 25 may be charged during the demand period 17 prior to the demand period 17 in which the consumed system power is scheduled to be equal to or less than the target demand 16 .

As a result, the shortage of power supplied from the storage battery 25 is suppressed, and the amount of power consumed by the power consumption device 3 can be supplied with high accuracy.

(8) In each of the above embodiments, the cause of the power outage in the power system 1 is not limited to the approach of a typhoon, but any other cause. You can judge the possibilities. As a result, the storage battery 25 can be charged in advance in response to various system power outages, and power can be appropriately supplied to the power consumption device 3 .

Further, in each of the above-described embodiments, power control may be performed without providing a configuration for predicting the possibility of occurrence of a power failure and changing to the charging promotion mode according to the prediction result. As a result, power control can be performed with a simple configuration.

It should be noted that the configurations disclosed in the above embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with configurations disclosed in other embodiments as long as there is no contradiction. The embodiments disclosed in this specification are examples, and the embodiments of the present invention are not limited thereto, and can be modified as appropriate without departing from the scope of the present invention.

INDUSTRIAL APPLICABILITY The present invention can be applied not only to power systems but also to power control when power is supplied from various power generation devices to power consumption devices.

1 power system 3 power consumption device 8 power generation device 11 power failure possibility prediction unit 14 input reception unit 16 target demand 17 demand period 17a unit period 25 storage battery 27 system power transition 28 unit system power amount 30 local side power control unit 35 comparison unit 37 Power source power adjustment unit 38 Charge correction unit 44 Target demand setting unit 45 Power supply operation planning unit 47 Power transition detection unit 48 Power consumption measurement unit 51 Demand forecast power amount 54 Chargeable power amount

Claims (8)

The basic charge is determined according to the amount of power used in the past, and is supplied to the power consumption device that operates with the system power supplied from the power system where the market price fluctuates and the power supply power supplied from the power supply equipment including the storage battery. A power control method for controlling power,
The power system to be purchased within a range that the demand forecast power amount to be consumed during the first period predicted in advance can be covered by the system power amount purchased from the power system in consideration of the power amount of the power source power that can be supplied. A step of setting, as a target demand, the system power amount to be used in a demand period of a predetermined length obtained by equally dividing the first period so that the power amount is minimized;
Predetermining the timing of charging and discharging the storage battery so that the system power amount to be purchased during each of the demand periods becomes the target demand,
The timing of charging the storage battery is determined by giving priority to the demand periods in which the system power amount used is less than the target demand in descending order of the market price, and in each of the demand periods, the target The chargeable power amount is obtained within a range that does not exceed the demand, and the chargeable power amount is accumulated in order from the demand period with the highest priority, and the chargeable power amount is the power that needs to be supplied from the power supply equipment. A power control method in which it is determined to charge the storage battery during the demand period accumulated up to the time when the amount is exceeded. The basic charge is determined according to the amount of power used in the past, and is supplied to the power consumption device that operates with the system power supplied from the power system where the market price fluctuates and the power supply power supplied from the power supply equipment including the storage battery. A power control program for controlling power,
The power system to be purchased within a range that the demand forecast power amount to be consumed during the first period predicted in advance can be covered by the system power amount purchased from the power system in consideration of the power amount of the power source power that can be supplied. A function of setting, as a target demand, the system power amount to be used in a demand period of a predetermined length obtained by equally dividing the first period so that the power amount is minimized;
causing a computer to execute a function of determining in advance the timing of charging and discharging the storage battery so that the system power amount to be purchased during each of the demand periods becomes the target demand;
The timing of charging the storage battery is determined by giving priority to the demand periods in which the system power amount used is less than the target demand in descending order of the market price, and in each of the demand periods, the target The chargeable power amount is obtained within a range that does not exceed the demand, and the chargeable power amount is accumulated in order from the demand period with the highest priority, and the chargeable power amount is the power that needs to be supplied from the power supply equipment. A power control program that determines to charge the storage battery during the demand period accumulated up to the time when the amount is exceeded. The basic charge is determined according to the amount of power used in the past, and is supplied to the power consumption device that operates with the system power supplied from the power system where the market price fluctuates and the power supply power supplied from the power supply equipment including the storage battery. A power control system that controls power,
The power system to be purchased within a range that the demand forecast power amount to be consumed during the first period predicted in advance can be covered by the system power amount purchased from the power system in consideration of the power amount of the power source power that can be supplied. a target demand setting unit that sets, as a target demand, the system power amount used in a demand period of a predetermined length obtained by equally dividing the first period so that the power amount is minimized;
A power supply operation planning unit that determines in advance the timing of charging and discharging the storage battery so that the system power amount purchased during each of the demand periods becomes the target demand,
The power supply operation planning unit gives priority to the timing of charging the storage battery in order of the lowest market price for the demand period in which the system power amount used is less than the target demand. In the demand period, the chargeable power amount is obtained within a range not exceeding the target demand, and the chargeable power amount is integrated in order from the demand period with the highest priority, and the chargeable power amount is the power supply facility. A power control system that determines to charge the storage battery during the demand period accumulated up to the time when the amount of power required to be supplied from the power source exceeds the amount of power. a power consumption measurement unit that measures a unit system power amount that is the system power amount consumed in each second period into which the demand period is divided;
Predicting the system power amount consumed during the demand period based on the unit system power amount, and when the predicted system power amount is equal to or less than the target demand, the power amount supplied from the power supply equipment and increases the amount of power supplied from the power supply equipment when the predicted system power amount is greater than the target demand;
a charging correction unit that, when the amount of electric power supplied from the power supply facility is increased, corrects the timing of charging the storage battery according to the increased amount of electric power and fluctuations in the market price. A power control system according to claim 3 . a local power control unit provided in association with the power consumption device;
Having a server-side power control unit capable of data communication with the local-side power control unit,
The local power control unit is provided with the power supply power adjustment unit, the charge correction unit, and the power consumption measurement unit,
5. The power control system according to claim 4, wherein the server-side power control unit is provided with the target demand setting unit and the power operation planning unit. 6. The power control system according to any one of claims 3 to 5, wherein each time the demand period elapses, the target demand in the first period starting from an elapsed point of time is set. 7. The power equipment according to any one of claims 3 to 6, wherein the power supply equipment includes a natural energy power generation device, and power generated by the natural energy power generation device is supplied to the power consumption device or the storage battery. power control system. an input reception unit that receives input of information by a user;
further comprising a blackout possibility prediction unit that predicts the possibility of a system blackout in which the power supply from the power system stops,
When the power failure possibility prediction unit predicts that there is a possibility of occurrence of the system power failure, the power supply operation planning unit refers to the instruction from the user received by the input reception unit,
charging the storage battery in a normal mode if the user does not desire to promote charging of the storage battery when there is a possibility of occurrence of a power outage;
8. The storage battery according to any one of claims 3 to 7, wherein if the user desires to promote charging of the storage battery, the storage battery is charged in a charge promotion mode in which charging of the storage battery is promoted rather than in the normal mode. or the power control system according to claim 1.

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