JP2015075827A - Load control device, load control system, load control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily control distributed loads.SOLUTION: A server 20 comprises: a control quantity determination unit 214 which determines control quantities Qs which are target values of total power consumption by a power storage device 10; a demand information reception unit 211 which receives demand information indicating relation between power prices and pieces of power consumption, from the power storage device 10; a fair price determination unit 215 which determines fair prices Ps according to the control quantities Qs on the basis of the demand information; and a price signal transmission unit 216 which transmits price signals indicating the fair prices Ps to the power storage device 10.

Description

  The present invention relates to a load control device, a load control system, a load control method, and a program.

  Autonomous distributed control using multi-agent technology is being researched to balance supply and demand using power storage loads and heat storage loads such as electric vehicles and water heaters. For example, Patent Document 1 discloses a system that communicates the amount of power that can be supplied, the type of power supply equipment, and the like.

JP 2012-249380 A

  However, in the invention described in Patent Document 1, it is necessary to communicate various types of information in order to perform cooperative control among multi-agents, and each agent performs complicated processing for cooperative control in addition to autonomous control. There is a need to do.

  The present invention has been made in view of such a background, and an object thereof is to provide a load control device, a load control system, a load control method, and a program capable of easily controlling a distributed load. .

  A main invention of the present invention for solving the above-mentioned problem is a load control device, which is communicably connected to a plurality of load devices that consume power according to a power price, and is a sum of power consumption by the load devices. Based on a control amount determination unit that determines a control amount that is a target value, a demand information acquisition unit that acquires, from the load device, demand information that is information representing a relationship between the power price and the power consumption, and the demand information And an appropriate price determining unit that determines an appropriate price according to the control amount, and a price signal transmitting unit that transmits a price signal indicating the appropriate price to the load device.

  In the load control device of the present invention, the demand information includes a power purchase price that is the power price at which the load device starts power consumption, and the power consumption per unit time at the power purchase price. Also good.

  In the load control device of the present invention, the appropriate price determination unit creates a demand curve representing a relationship between the power price and the total power consumption based on the demand information, and the control amount in the demand curve May be determined as the appropriate price.

  Another aspect of the present invention is a load control system including a plurality of load devices that consume power according to a power price, and a server device that is communicably connected to the plurality of load devices. The load device includes a demand information transmission unit that creates demand information that is information representing a relationship between the power price and power consumption and transmits the demand information to the server device. The server device is based on the load device. A control amount determination unit that determines a control amount that is a target value of the total power consumption, a demand information reception unit that receives the demand information from the load device, and an appropriate price according to the control amount based on the demand information And a price signal transmitting unit that transmits a price signal indicating the appropriate price to the load device, and the load device receives the price signal from the server device. A price signal receiving unit, and further comprising a control unit for controlling the power consumption in response to the power price the price signal is shown.

  According to another aspect of the present invention, there is provided a load control method in which a computer that is communicably connected to a plurality of load devices that consume power according to a power price is a target for the total power consumption by the load devices. A step of determining a control amount that is a value, a step of obtaining demand information that is information representing a relationship between the power price and the power consumption, from the load device, and the control amount based on the demand information The steps of determining an appropriate price and transmitting a price signal indicating the appropriate price to the load device are executed.

  According to another aspect of the present invention, there is provided a program having a target value of a total power consumption by the load device, connected to a computer that is communicably connected to a plurality of load devices that consume power according to a power price. A step of determining a certain control amount, a step of obtaining demand information, which is information representing a relationship between the power price and the power consumption, from the load device, and an appropriate price according to the control amount based on the demand information And a step of transmitting a price signal indicating the appropriate price to the load device.

  Other problems and solutions to be disclosed by the present application will be made clear by the embodiments of the invention and the drawings.

  According to the present invention, a distributed load can be easily controlled.

It is a figure which shows an example of the whole structure of the electric power system of this embodiment. 2 is a diagram illustrating a hardware configuration example of a power storage device 10. FIG. 3 is a diagram illustrating a software configuration example of a power storage agent 11. FIG. It is a figure which shows the flow of the process by the electrical storage agent. It is a figure which shows the flow of a demand information transmission process. 2 is a diagram illustrating a hardware configuration example of a server 20. FIG. 2 is a diagram illustrating an example of a software configuration of a server 20. FIG. It is a figure which shows the flow of the process by the server. It is a figure explaining the determination method of a reasonable price. It is a figure which shows the flow of a control amount determination process. It is a figure which shows the flow of a leveling process. It is a figure explaining the control which makes an apparent demand the minimum load.

== Overall system configuration ==
Hereinafter, a power system according to an embodiment of the present invention will be described. FIG. 1 is a diagram illustrating an example of the overall configuration of the power system according to the present embodiment. The power system according to the present embodiment includes the power storage device 10 and the server 20. The power storage device 10 and the server 20 each have a communication function, and are connected to each other via a communication network 30 so that they can communicate with each other. The communication network 30 is, for example, the Internet, and is constructed by, for example, a public telephone line, a mobile phone line, a wireless communication path, a dedicated telephone line, a power line, a serial cable, Ethernet (registered trademark), or the like.

  The power storage device 10 is a device that charges or discharges the storage battery according to the power price.

  The server 20 is a computer such as a personal computer and a workstation that determines an appropriate power price (hereinafter referred to as an appropriate price) that balances supply and demand. The server 20 transmits information indicating the determined appropriate price (hereinafter referred to as a price signal) to the load system 10. Thereby, in the electric power system of this embodiment, it is going to set an appropriate price so that the supply-and-demand balance in an electric power system may be taken, performing the autonomous control of charge or discharge by the load system 10. In this embodiment, the server 20 shall be installed in a substation for every electric power system, and controls the electrical storage apparatus 10 in the same area (the same electric power system).

== Configuration of Power Storage Device 10 ==
FIG. 2 is a diagram illustrating a hardware configuration example of the power storage device 10. The power storage device 10 includes a power storage agent 11 and a storage battery 12. The storage battery 12 is assumed to be a general storage battery that is charged and discharged by external control. The power storage agent 11 is a computer that controls the storage battery 12. As will be described later, the power storage agent 11 controls the storage battery 12 so that the storage battery 12 is charged or discharged according to the price signal.

  The power storage agent 11 includes a CPU 101, a memory 102, a storage device 103, a communication interface 104, and a control interface 105. The storage device 103 stores various data and programs, for example, a flash memory, a solid state drive, a hard disk drive, and the like. The CPU 101 implements various functions by reading a program stored in the storage device 103 into the memory 102 and executing it. The communication interface 104 is an interface for connecting to the communication network 30. For example, a PLC modem for connecting to a power line to perform power line communication (PLC), a modem for connecting to a public telephone line network A wireless communication device for connecting to a wireless communication network, an adapter for connecting to Ethernet (registered trademark), and the like. The control interface 105 is an interface for connecting to the storage battery 12. The control interface 105 may be, for example, an interface for performing serial communication, a terminal for outputting an electrical signal, or a communication interface for performing information communication with the storage battery 12. Also good. The power storage agent 11 can control the storage battery 12 by transmitting a command signal to the load 12 via the control interface 105.

  FIG. 3 is a diagram illustrating a software configuration example of the power storage agent 11. The power storage agent 11 includes a power storage information acquisition unit 111, a power purchase price determination unit 112, a demand information transmission unit 113, a price signal reception unit 114, a charge / discharge control unit 115, a power storage information storage unit 131, and a price signal storage unit 132.

  The power storage information acquisition unit 111, the power purchase price determination unit 112, the demand information transmission unit 113, the price signal reception unit 114, and the charge / discharge control unit 115 are stored in the storage device 103 by the CPU 101 included in the load agent 11 of the load system 10. The load information storage unit 131 and the price signal storage unit 132 are realized as part of a storage area provided by the memory 102 and the storage device 103.

  The storage information storage unit 131 stores information related to the storage battery 12 (hereinafter referred to as storage information). The power storage information includes the power consumption per unit time of the storage battery 12, the capacity of the storage battery 12, the use start time, the maximum power price (hereinafter referred to as Pmax), and the like. The storage battery 12 is charged by the capacity by the use start time, and if the power price is equal to or less than the purchase price, the storage battery 12 is charged, and if the power price exceeds Pmax, the battery is not charged. And

  The power storage information acquisition unit 111 acquires power storage information and registers the acquired power storage information in the power storage information storage unit 131. The power storage information acquisition unit 111 can accept input of power storage information from the user. For example, the storage information acquisition unit 111 can acquire the capacity of the storage battery 12 from the storage battery 12 via the control interface 105. Moreover, the electrical storage information acquisition part 111 can also acquire the present electrical storage amount of the storage battery 12, for example. The power storage information acquisition unit 111 may receive an input of the current power storage amount from the user, or may acquire the current power storage amount from the storage battery 12 via the control interface 105.

  The power purchase price determination unit 112 determines a price for charging the storage battery 12 (hereinafter referred to as a power purchase price). The power purchase price determination unit 112 determines the power purchase price according to the current power storage amount of the storage battery 12. For example, the power purchase price determination unit 112 determines the power purchase price so that the larger the difference between the capacity of the storage battery 12 and the current power storage amount, the lower the price. In the present embodiment, a value obtained by dividing the time until the use start time by the time required for charging (the difference between the capacity of the storage battery 12 and the current storage amount is divided by the power consumption per unit time) is multiplied by Pmax. The purchase price.

  The demand information transmission unit 113 transmits information related to power demand by the power storage device 10 (hereinafter referred to as demand information) to the server 20. The demand information includes information for identifying the power storage agent 11 (hereinafter referred to as an agent ID), a power purchase price, and power consumption. The demand information transmission unit 113 transmits demand information including the agent ID of the power storage agent 11 and the power purchase price and power consumption stored in the power storage information storage unit 131 to the server 20.

  The price signal receiving unit 114 receives a price signal transmitted from the server 20. The price signal receiving unit 114 registers the price signal received from the server 20 in the price signal storage unit 132.

  The charge / discharge control unit 115 controls the storage battery 12 according to the price signal. The charge / discharge control unit 115 charges the storage battery 12 when the price signal stored in the price signal storage unit 132 is equal to or less than the power purchase price stored in the power storage information storage unit 131, and the storage battery When the battery 12 is fully charged (the amount of electricity stored in the storage battery 12 becomes the capacity of the storage battery 12) or when the price signal exceeds the power purchase price, the charging of the storage battery 12 is stopped. In addition, control of charge to the storage battery 12 is assumed to be general control, and description thereof is omitted here.

== Processing of Power Storage Device 10 ==
FIG. 4 is a diagram showing a flow of processing by the power storage agent 11.

  The power purchase price determination unit 112 sets the use start time stored in the power storage information storage unit 131 to t0 (S401), and uses the capacity (Ws) stored in the power storage information storage unit 131 as power consumption per unit time. A value divided by (Q) is set as Tf0 (S402). The power storage agent 11 repeats the following processing.

  The power storage agent 11 executes the demand information transmission process shown in FIG. 5 (S403). The power purchase price determination unit 112 subtracts the current time t from t0 to calculate the time T until the use start time (S421). The power storage information acquisition unit 111 acquires the current power storage amount W of the storage battery 12 (S422). The power purchase price determining unit 112 subtracts the value obtained by dividing W by Q from Tf0 to calculate the time Tf required until full charge (S423). The power purchase price determining unit 112 calculates the power purchase price P by multiplying Pmax by a value obtained by dividing the time T until the use start time by the time Tf required to fully charge (S424). The demand information transmission unit 113 transmits demand information including the power purchase price P and the power consumption Q to the server 20 (S425).

  When the price signal receiving unit 114 has received the price signal Ps (S404: YES), the charge / discharge control unit 115 proceeds to the rechargeable battery 12 if the price signal Ps is equal to or less than the power purchase price P (S405: YES). If the price signal Ps is larger than the power purchase price P (S405: NO), the charging of the rechargeable battery 12 is stopped (S407).

  By repeatedly executing the above processing, the power storage agent 11 determines the power purchase price according to the time taken for charging and the current power storage amount, notifies the server 20 of this, and responds to the price signal. Thus, charging control to the storage battery 12 can be performed.

== Configuration of Server 20 ==
FIG. 6 is a diagram illustrating a hardware configuration example of the server 20. The server 20 includes a CPU 201, a memory 202, a storage device 203, a communication interface 204, an input device 205, and an output device 206. The storage device 203 is, for example, a hard disk drive, a solid state drive, or a flash memory that stores various data and programs. The CPU 201 implements various functions by reading the program stored in the storage device 203 into the memory 202 and executing it. The communication interface 204 is an interface for connecting to the communication network 30. For example, a PLC modem for connecting to a power line and performing power line communications (PLC), a modem for connecting to a public telephone line network An adapter for connecting to Ethernet (registered trademark), a wireless communication device for connecting to a wireless communication network, and the like. The input device 205 is a keyboard, mouse, trackball, touch panel, microphone, or the like that accepts data input. The output device 206 is, for example, a display, a printer, or a speaker that outputs data.

  FIG. 7 is a diagram illustrating a software configuration example of the server 20. The server 20 includes a demand information reception unit 211, a demand curve creation unit 212, a load current measurement unit 213, a control amount determination unit 214, an appropriate price determination unit 215, a price signal transmission unit 216, a demand supply curve storage unit 231, and a demand curve storage. Unit 232, demand history storage unit 233, and reasonable price storage unit 234.

  The demand information receiving unit 211, the demand curve creating unit 212, the load current measuring unit 213, the control amount determining unit 214, the appropriate price determining unit 215, and the price signal transmitting unit 216 are stored in the storage device 203 by the CPU 201 included in the server 20. The demanded supply curve storage unit 231, the demand curve storage unit 232, the demand history storage unit 233, and the appropriate price storage unit 234 are realized by reading out the stored programs into the memory 202 and executing them. This is realized as a part of a storage area provided by the storage device 203.

The demand information receiving unit 211 receives demand information transmitted from the power storage device 10. The demand information receiving unit 211 registers the received demand information in the demand information storage unit 231. The demand curve creation part 212 memorize | stored in the demand information storage part 231 calculates | requires the demand curve in an area based on demand information. For example, the demand curve creation unit 212 totals the power consumption of the demand information for each power price, calculates the cumulative power consumption in the order of the power price, and creates a function representing the relationship between the power price and the cumulative power consumption. Can do. The demand curve may be created geometrically, or the accumulated power consumption may be stored in a table format in association with the power price for each predetermined unit circle (for example, 1 yen). .

  The load current measuring unit 213 measures a load current (hereinafter referred to as PL) at a substation of the power system in which the server 20 is installed. The load current measurement unit 213 uses a known method for the load current measurement process, and the description thereof is omitted here. It is assumed that the load current measurement unit 213 registers the history of the measured load current in the demand history storage unit 233 every time the load current is measured. The load current PL is a total of power consumption (hereinafter referred to as Qs) by a load (in this embodiment, the power storage device 10) that can be controlled by a price signal, and a load that cannot be controlled by a price signal. (In this embodiment, it is a total value of the total power consumption (hereinafter referred to as PL0) by all loads other than the power storage device 10 and hereinafter referred to as non-control load).

  Control amount determination unit 214 determines a target value of the total power consumption by power storage device 10 (hereinafter referred to as a control amount, also referred to as Qs). For example, when the power supply amount fluctuates due to wind power generation, solar power generation, or the like, the control amount determination unit 214 determines, as the control amount Qs, the amount by which the demand amount by the power storage device 10 should be increased according to the variation. Details of the control amount Qs determination process will be described later. It is assumed that the control amount determination unit 214 registers the history of the determined control amount in the demand history storage unit 233 every time the control amount is determined.

  The appropriate price determination unit 215 determines an appropriate price. The appropriate price determination unit 215 determines the power price corresponding to the control amount Qs in the demand curve as the appropriate price. The appropriate price determination unit 215 registers the determined appropriate price in the appropriate price storage unit 234.

  Price signal transmission unit 216 transmits a price signal indicating an appropriate price stored in appropriate price storage unit 334 to power storage device 10. As a result, in the power storage device 10, charging is controlled according to the appropriate price.

== Processing of Server 20 ==
FIG. 8 is a diagram showing the flow of processing by the server 20.

  When the demand information receiving unit 211 receives the demand information transmitted from the power storage device 10 (S501: YES), the received demand information is registered in the demand information storage unit 231 (S502). Demand information as shown in the list 21 of FIG. 9 is registered in the demand information storage unit 231.

  The demand curve creation unit 212 totals power consumption for each power purchase price from the demand information storage unit 231 and creates a demand curve in the area (S503). As shown in FIG. 9, the demand curve creation unit 212 converts the power purchase price into the power price for each power price from the maximum price Pmax to the lowest price (for example, 0 yen) in increments of 1 yen. The power consumption of the matching demand information is totaled to calculate the cumulative product power. Table 22 in FIG. 9 shows the calculation results.

  The control amount determination unit 214 calculates the control amount Qs by a control amount calculation process shown in FIG. 10 described later (S504).

  As shown in FIG. 10, the control amount determination unit 214 sets a minimum value of power consumption (hereinafter referred to as minimum load power) Qmin (S521). The minimum load power may be received, for example, from an operator, or may be determined according to the minimum amount of generated power from the generator. The control amount determination unit 214 sets the control amount Qs to 0 (S522). Thereafter, the following processing is repeated. The load current measuring unit 213 measures the load current PL at the substation (S523). The load current measurement unit 213 registers the measured load current PL in the demand history storage unit 233 (S524). If the value obtained by subtracting the control amount Qs from the load current PL is equal to or less than the minimum load power Qmin (S525: YES), the control amount determination unit 214 subtracts the value obtained by subtracting the control amount Qs from the load current PL from the minimum load power. The control amount is Qs (S526).

  On the other hand, when the value obtained by subtracting the control amount Qs from the load current PL is larger than the minimum load power Qmin (S525: NO), the demand leveling process shown in FIG. 11 is performed (S527). The control amount determination unit 214 sets a quotient obtained by dividing the maximum value Qmax of the demand control amount by 2 as Qs0 (S541). An arbitrary value may be set for Qs0. The controlled variable determining unit 214 moves the difference L0 obtained by subtracting the controlled variable Qs from the load current PL for a predetermined period (for example, any period such as one day) from the demand history storage unit 233 before the current period. The average is calculated as PL ′ (S542), and the value obtained by subtracting Qs from PL is subtracted from the value obtained by adding PL ′ to Qs0 to obtain Qs (S543).

  Returning to FIG. 9, the control amount determination unit 214 registers the determined Qs in the demand history storage unit 233 (S505), and the appropriate price determination unit 215 obtains the price corresponding to Qs from the demand curve and sets it as the appropriate price Ps ( S506). In the demand curve 23 of FIG. 9, the price P corresponding to the control amount Qs becomes the appropriate price Ps. The price signal transmission unit 216 transmits the appropriate price Ps as a price signal to all the power storage devices 10 (power storage agents 11) (S507).

== Effects of this power system ==
As described above, according to the power system of the present embodiment, the server 20 can control the power storage device 10 only by giving a price signal to the power storage device 10. Therefore, it becomes possible to easily control the dispersed power storage devices 10.

  Further, according to the power system of the present embodiment, the server 20 obtains a demand curve based on the demand information acquired from the power storage device 10, and the price corresponding to the control amount Qs in the demand curve is determined as an appropriate price. it can. Therefore, since it is based on a demand curve, an appropriate price can be determined easily and appropriately.

  Further, according to the power system of the present embodiment, when the difference between PL and Qs is lower than the minimum load power Qmin, the difference is subtracted from Qmin to obtain the control amount Qs, so that the demand becomes Qmin. Can be controlled. That is, as shown in FIG. 12, when there is a period 61 and a period 62 in which the power supply amount fluctuates due to, for example, wind power generation or solar power generation, and the apparent demand PL0 decreases and falls below the minimum load power, The control amount Qs can be determined so that the power demand becomes the minimum load power Qmin during these periods. This makes it possible to maintain a supply-demand balance even when the amount of power supply varies due to wind power generation or solar power generation.

  Further, according to the power system of the present embodiment, the demand Qs of the controllable power storage device 10 can be adjusted with the target of the moving average PL ′ of the demand PL0 (difference between PL and Qs) of the non-control load. . Thereby, since the whole electric power demand PL can be smoothed, it becomes possible to suppress the peak of a demand and to operate a stable electric power system.

  In addition, according to the power system of the present embodiment, the power storage device 10 may determine whether to charge the storage battery 12 according to the comparison between the power price Ps indicated by the price signal and the power purchase price P. The charging control of the device 10 can be easily performed.

== Modification ==
In the present embodiment, the load to be controlled from the server 20 is the power storage device 10 that controls the charging of the storage battery 12. However, the present invention is not limited to this, and any type can be used as long as it consumes power. Absent. For example, the load may be a heat storage device such as a water heater. In this case, the heat storage device is also provided with the same agent as the power storage agent 11, and the current heat storage amount is acquired as W in step S422 in FIG. 5 and is set to W in steps S406 and S407 in FIG. It is assumed that the start (S406) or the end (S407) is performed.

  In the present embodiment, the server 20 is installed in a substation of the power system and controls demand for each power system. However, one server 20 receives demand information from a plurality of power systems, One server 20 may transmit a price signal so as to adjust demands of a plurality of power systems. In this case, the demand information storage unit 231, the demand curve storage unit 232, the demand history storage unit 233, and the appropriate price storage unit 234 of the server 20 each have a demand information, a demand curve, a load current and a controlled variable, and an appropriate amount for each power system. The price is stored, the demand curve creation unit 212 creates a demand curve for each power system, the load current measurement unit 213 measures the load current for each power system, and the control amount determination unit 214 controls for each power system. The amount Qs is determined, the appropriate price determination unit 215 determines the power price corresponding to the control amount for the power system as the appropriate price from the demand curve for each power system, and the price signal transmission unit 216 The appropriate price is transmitted as a price signal only to the power storage device 10 corresponding to the power system.

  In the present embodiment, the demand information includes the power purchase price and the power consumption per unit time. However, the demand information is not limited to this, for example, a function for obtaining power consumption according to the power purchase price, etc. Any relationship can be used as long as it represents the relationship between the power purchase price and the power consumption in the load, and a demand curve in the area can be created based on the relationship.

  In the present embodiment, the demand information is periodically transmitted to the server 20, but may be transmitted at an arbitrary timing. For example, demand information may be returned in response to a request from the server 20, or may be transmitted in response to an instruction from an operator.

  In the present embodiment, the price signal is transmitted from the server 20 and the power storage device 10 waits for this. However, the present invention is not limited to this. For example, the price signal receiving unit 114 may be at any timing (for example, power storage information). May be transmitted to the server 20 (such as when an operator is registered or when an instruction is received from an operator), and the server 20 may receive a price signal responding to the request.

  In the present embodiment, charging is unconditionally performed if the price Ps indicated by the price signal is equal to or less than the power purchase price, but charging may not be performed if the battery is fully charged.

  In the present embodiment, the capacity Ts is calculated by dividing the capacity Ws by the power consumption Q. However, the present invention is not limited to this, and if the power consumption used for charging can be changed, the purchase can be made. In the case of a price signal cheaper than the electricity price, charging may be performed so that the amount of power consumption is larger. In this case, the power consumption for each price is transmitted to the server 20 as demand information.

  In the present embodiment, the supply function and the storage function (including the charge function and the discharge function) are functions for calculating the power generation amount or the charge / discharge amount by substituting the power price. Instead, it may be information indicating the relationship between the power price and the amount of power generation or charge / discharge. For example, the power generation amount or the charge / discharge amount may be managed in association with the power price for each predetermined unit amount (for example, any amount such as 1 yen, 5 yen, 10 yen, etc.).

  The supply function and the storage function (including the charge function and the discharge function) are information indicating the relationship between the power price, the power generation amount, and the charge / discharge amount, and the change in the power price and the change in the power generation amount / charge / discharge amount. Information indicating the price elasticity of the power generation amount or the charge / discharge amount.

  In the present embodiment, the total supply amount and the total charge amount for each power price are recorded as a table, and the supply curve and the demand curve are determined based on the table. For example, the power generation function and the storage function are equations. In this case, the supply function and the demand function can also be expressed by an equation. In this case, the intersection of the supply function and the demand function is calculated by using the equation. You may make it do.

  In the present embodiment, the power generation apparatus 10 includes the power generation agent 11 and the power generator 12. However, the power generation agent 11 and the power generator 12 may be provided as separate apparatuses. Similarly, the power storage agent 21 and the storage battery 22 may be provided as separate devices. One power generation agent 11 may control a plurality of generators 12 and one power storage agent 21 may control a plurality of storage batteries 22.

  In the present embodiment, the server 30 is a single computer, but may be realized by a plurality of computers. In this case, for example, one virtual computer may be realized by a plurality of computers, or a storage unit and a function unit may be distributed to a plurality of computers.

  Although the present embodiment has been described above, the above embodiment is intended to facilitate understanding of the present invention and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

DESCRIPTION OF SYMBOLS 10 Power storage device 20 Server 111 Power storage information acquisition part 112 Electric power purchase price determination part 113 Demand information transmission part 114 Price signal reception part 115 Charge / discharge control part 131 Power storage information storage part 132 Price signal storage part 211 Demand information reception part 212 Demand curve creation Unit 213 load current measurement unit 214 control amount determination unit 215 reasonable price determination unit 216 price signal transmission unit 231 demand supply curve storage unit 232 demand curve storage unit 233 demand history storage unit 234 reasonable price storage unit

Claims (6)

It is communicably connected to multiple load devices that consume power according to the electricity price,
A control amount determining unit that determines a control amount that is a target value of the total power consumption by the load device;
A demand information acquisition unit that acquires demand information, which is information representing a relationship between the power price and the power consumption, from the load device;
A reasonable price determination unit that determines a reasonable price according to the control amount based on the demand information;
A price signal transmitter that transmits a price signal indicating the appropriate price to the load device;
A load control device comprising: The load control device according to claim 1,
The demand information includes a power purchase price that is the power price at which the load device starts power consumption, and the power consumption per unit time at the power purchase price;
A load control device. The load control device according to claim 2,
The appropriate price determination unit creates a demand curve representing a relationship between the power price and the total power consumption based on the demand information, and determines the power price corresponding to the control amount in the demand curve as the appropriate price. To decide as,
A load control device. A plurality of load devices that consume power according to the power price, and a server device that is communicably connected to the plurality of load devices,
The load device includes a demand information transmission unit that creates demand information that is information representing a relationship between the power price and power consumption and transmits the demand information to the server device.
The server device
A control amount determining unit that determines a control amount that is a target value of the total power consumption by the load device;
A demand information receiving unit for receiving the demand information from the load device;
A reasonable price determination unit that determines a reasonable price according to the control amount based on the demand information;
A price signal transmitter that transmits a price signal indicating the appropriate price to the load device;
With
The load device is:
A price signal receiving unit for receiving the price signal from the server device;
A control unit for controlling power consumption according to the power price indicated by the price signal;
A load control system comprising: A computer that is communicably connected to a plurality of load devices that consume power according to the power price.
Determining a control amount that is a target value of the total power consumption by the load device;
Obtaining demand information, which is information representing a relationship between the power price and the power consumption, from the load device;
Determining an appropriate price according to the control amount based on the demand information;
Transmitting a price signal indicating the reasonable price to the load device;
The load control method characterized by performing. To a computer that is communicably connected to multiple load devices that consume power according to the power price,
Determining a control amount that is a target value of the total power consumption by the load device;
Obtaining demand information, which is information representing a relationship between the power price and the power consumption, from the load device;
Determining an appropriate price according to the control amount based on the demand information;
Transmitting a price signal indicating the reasonable price to the load device;
A program for running

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