JP2024069860A - Electricity supply and demand control system and electric power supply and demand control method - Google Patents

Abstract

[Problem] To make it possible to use equipment at a consumer's facility, the power consumption of which is difficult to control, as a resource for adjusting the supply and demand balance of a power system. [Solution] An electric power supply and demand control system adjusts the supply and demand balance of a power system using equipment at a consumer's facility. The equipment includes general load equipment and a storage battery connected to the power system, and a charge and discharge control device that controls the charging and discharging of the storage battery. A load monitoring control device that is communicatively connected to the general load equipment and the charge and discharge control device receives an adjustment command for the consumer's load from a supply and demand adjustment server of the power system, acquires a measured value of the load at the consumer's receiving point, and controls the operation of the general load equipment so that the load becomes the target load of the adjustment command. In addition, the load monitoring control device controls the charge and discharge control device to charge or discharge the storage battery so as to eliminate the difference between the load and the target load that cannot be eliminated by controlling the general load equipment. [Selected Figure] Figure 6

Description

The present invention relates to an electric power supply and demand control system and an electric power supply and demand control method, and in particular to a technology for controlling the supply and demand balance of an electric power system.

In recent years, the introduction of renewable energy sources such as solar and wind power, whose power generation is easily affected by natural conditions, and the spread of distributed energy resources (hereinafter referred to as "resources") on the consumer side such as cogeneration and storage batteries, have led to a growing awareness of the importance of energy management that takes into account the balance between supply and demand of electricity. Against this backdrop, research and construction of so-called Virtual Power Plants (VPPs) that use IoT to bundle and remotely/integrally control (aggregate) distributed resources on the consumer side such as factories and homes to adjust the balance between supply and demand of electricity are underway, and various technologies have been proposed.

For example, Patent Document 1 describes a power control system configured for the purpose of controlling resources in a way that is easily accepted by consumers. The power control system controls resources installed in a facility based on a specific command, and provides adjustment power for power supply and demand or wholesale power. The power control system acquires the specific command, acquires power reception information related to the power received at the facility, and determines whether or not the direction of control over the facility's resources corresponds to an upward direction based on the specific command and the power reception information, and if it is determined that the direction corresponds to an upward direction, determines whether or not control over the resources should be implemented.

For example, Patent Document 2 describes a demand response system configured to realize a highly accurate demand response. The demand response system includes a first aggregator device that performs demand response-related control of a first device group including a first heat pump device, a second aggregator device that performs demand response-related control of a second device group different from the first device group, and a first upper aggregator device that transmits an energy adjustment request to the first aggregator device and the second aggregator device. In response to the energy adjustment request, the first aggregator device performs demand response-related control of the first device group installed in multiple buildings using a first dedicated command for the first device group. In response to the energy adjustment request, the second aggregator device performs demand response-related control of the second device group installed in multiple buildings using a second dedicated command for the second device group that is different from the first dedicated command.

International Publication No. 2020/261797 JP 2014-236580 A

Currently, the equipment mainly used as resources in VPPs is equipment that can control the power output and power consumption, such as storage batteries and private power generation equipment. On the other hand, equipment on the consumer side, such as air conditioners (hereinafter referred to as "air conditioners"), heat pump water heaters, and electric hot water heaters (electric hot water heaters), also consume relatively large amounts of power and are expected to be used as VPP resources, but there are the following issues. For example, air conditioners and heat pump water heaters can control their power consumption to a certain extent by using room temperature settings and shift functions, but it is difficult to strictly control them as VPP resources because it is necessary to ensure the freedom of use for users. In addition, electric hot water heaters can increase and decrease their power consumption by on/off control, but they are usually controlled by two values (100% load or 0% load) of on/off, making it difficult to strictly control the power consumption in response to adjustment commands such as DR commands.

The present invention has been made in light of this background, and aims to provide an electricity supply and demand control system and an electricity supply and demand control method that can utilize equipment whose power consumption is difficult to control (set, control) or predict as a resource for adjusting the supply and demand balance of the power grid.

One of the present inventions for achieving the above object is an electric power supply and demand control system that adjusts the supply and demand balance of an electric power system using equipment present at a consumer connected to the electric power system, the equipment includes general load equipment and a storage battery connected to the electric power system, and a charge and discharge control device that controls the charging and discharging of the storage battery, and is equipped with a load monitoring control device that is an information processing device having a processor and a storage device and is communicatively connected to the general load equipment and the charge and discharge control device, the load monitoring control device is communicatively connected to a supply and demand adjustment server that adjusts the supply and demand of the electric power system, receives an adjustment command for the load of the consumer from the supply and demand adjustment server, obtains a measured value of the load at the receiving point of the consumer, controls the operation of the general load equipment so that the load becomes the target load of the adjustment command, and controls the charge and discharge control device to charge or discharge the storage battery so as to eliminate the difference between the load and the target load that cannot be eliminated by controlling the general load equipment.

Other problems and solutions disclosed in this application will be made clear in the detailed description of the invention and the drawings.

According to the present invention, equipment whose power consumption is difficult to specify (set, control) or predict can be used as a resource for adjusting the supply and demand balance of the power grid.

1 is a diagram showing a schematic configuration of an electric power supply and demand control system. FIG. 2 is a diagram showing the main equipment configuration at a consumer's facility. 13 is an example of load control when a "downward DR" is received as an adjustment command from a supply and demand adjustment server. This is an example of load control when an "upward DR" is received as an adjustment command from a supply and demand adjustment server. This is an example of load control in the case where the general load equipment is an electric water heater. 2 is a diagram illustrating main functions of a supply and demand adjustment server. FIG. 2 is a diagram for explaining main functions of a load monitoring and control device. FIG. 11 is a flowchart illustrating a load control process. 1 is an example of a hardware configuration of an information processing device used to realize a supply and demand adjustment server or a load monitoring and control device.

The following describes an embodiment of the present invention with reference to the drawings. In the following description, the letter "S" before each reference symbol indicates a processing step.

Figure 1 shows a schematic configuration of an electric power supply and demand control system 1 according to one embodiment of the present invention. As shown in the figure, the electric power supply and demand control system 1 includes one or more consumers 2, a power grid 3, and a supply and demand adjustment server 100.

The various facilities constituting the power system 3, the consumers 2, and the supply and demand adjustment server 100 are communicatively connected via a communication network 5. The communication network 5 is a communication infrastructure that realizes wired or wireless communication, and is, for example, the Internet, a LAN (Local Area Network), a WAN (Wide Area Network), a wireless LAN, a power line communication network, various public communication networks, a dedicated line, etc.

The power system 3 includes, for example, conventional power generation facilities such as thermal power generation facilities, and power generation facilities that utilize renewable energy such as wind power generation facilities and photovoltaic power generation facilities (PV: PhotoVoltaic). The power system 3 includes a function as a VPP (Virtual Power Plant), and uses the facilities of the consumers 2 as VPP resources.

The supply and demand adjustment server 100 is an information processing device operated by an operator of the power system 3, such as a power transmission and distribution business operator (general power transmission and distribution business operator, aggregation business operator, etc.). The supply and demand adjustment server 100 acquires the real-time supply of power from various power generation facilities connected to the power system 3 and the real-time consumption of power based on the measurement values of smart meters, etc. installed in each consumer 2 connected to the power system 3, and adjusts the power supply and demand balance in the power system 3 (load leveling, absorbing the excess supply of renewable energy, supplying necessary power during power shortages, etc.) based on the acquired supply and consumption. For example, when the operator is a general power transmission and distribution business operator, the supply and demand adjustment server 100 performs the above adjustment using, for example, real-time supply and demand information on a substation basis. Also, for example, when the operator is an aggregation business operator, the supply and demand adjustment server 100 performs the above adjustment using, for example, measurement values acquired from smart meters, etc. The above adjustments are made, for example, by predictions (power generation plans) based on previously accumulated information (supply and demand information, weather information, etc.), weather forecast information, or demand forecast information, etc., complementing the above forecasts based on observed values (actual values) (output adjustments, procurement from the market, etc.), and adjusting the output of generators according to frequency (high-speed output adjustments such as governor-free, etc.). The supply and demand adjustment server 100 may function as, for example, an EMS (Energy Management System).

The supply and demand adjustment server 100 adjusts the balance of power supply and demand in the power grid 3, for example, by DR (Demand Response). The supply and demand adjustment server 100 functions as an aggregator server in the VPP, and transmits, for example, a command to the consumer 2 to prompt the charging of the storage battery 31 in order to consume excess renewable energy output (hereinafter referred to as "upward DR"). Also, for example, the supply and demand adjustment server 100 transmits, for example, a command to the consumer 2 to prompt the discharging of the storage battery 31 (supply to the power grid 3) (hereinafter referred to as "downward DR") when there is a shortage of power supply, such as during times of peak demand for electricity.

Figure 2 shows the main equipment configuration at the consumer 2. As shown in the figure, the consumer 2 is equipped with a smart meter 20, a load monitoring and control device 200, a storage battery 31, a charge/discharge control device 30, and general load equipment 40. The smart meter 20 is connected to the power grid 3. The general load equipment 40, the charge/discharge control device 30, and the load monitoring and control device 200 receive power from the power grid 3, etc., via the in-house wiring 7.

The smart meter 20 and the load monitoring control device 200 are connected to the supply and demand adjustment server 100 and the power system 3 directly or indirectly via the communication network 5 so as to be able to communicate with each other. The form of communication between the smart meter 20 and the load monitoring control device 200 and the supply and demand adjustment server 100 and the power system 3 is not necessarily limited. The load monitoring control device 200 is connected to the smart meter 20, the charge and discharge control device 30, and the general load equipment 40 so as to be able to communicate with each other via the home communication network 6. The home communication network 6 is a communication infrastructure that realizes communication by a wired method or a wireless method, and is, for example, a LAN, a WAN, a wireless LAN, a power line communication network, etc. In the home communication network 6, communication is performed in accordance with a standard such as ECHONET (registered trademark). The load monitoring control device 200 may function as a so-called HEMS (Home Energy Management System) server (including a HEMS gateway, etc.).

The smart meter 20 is equipped with various measuring devices such as a timing device, a voltmeter, an ammeter, etc., and measures the load (power consumption) at the consumer 2, measures the power supplied from the power grid 3 to the consumer 2, measures the power provided from the consumer 2 to the power grid 3, etc., and notifies (transmits) these time-series measurement values in real time to the load monitoring control device 200. Note that in this embodiment, the smart meter 20 is shown as an example of a device equipped with such functions, but other types of devices other than the smart meter 20 (e.g., devices equipped with other types of sensors) may be used as long as they have functions equivalent to or greater than those of the illustrated smart meter 20.

The charge/discharge control device 30 charges the storage battery 31 with power supplied via the in-house wiring 7. The charge/discharge control device 30 also supplies the power (discharged power) of the storage battery 31 to the in-house wiring 7. The storage battery 31 is, for example, a secondary battery such as a lithium ion secondary battery, a nickel-metal hydride battery, or a lead storage battery.

The charge/discharge control device 30 controls the charging or discharging of the storage battery 31 in response to a charge or discharge control command sent from the load monitoring control device 200. The charge/discharge control device 30 notifies (transmits) real-time information on the state of the storage battery 31 (such as the charging voltage and discharging voltage of the storage battery 31 and the SOC (State Of Charge)) to the load monitoring control device 200.

The general load equipment 40 is a load equipment present at the consumer 2 that cannot eliminate the difference between the load and the target load by itself, such as low-voltage equipment or general household equipment (such as an air conditioner (hereinafter referred to as "air conditioner"), a heat pump water heater (including what is known as "air to water"), an electric water heater (electric water heater), etc.). The general load equipment 40 controls its own operation (for example, the set temperature and air volume in the case of an air conditioner or a heat pump water heater, or turning the power on and off in the case of an electric water heater) in response to instructions from the load monitoring control device 200.

The load monitoring control device 200 acquires the load of the consumer 2 (the load at the receiving point with the power grid 3 (the total load of the consumer 2)) from the smart meter 20. The load monitoring control device 200 also receives an adjustment command for the supply and demand balance of the power grid 3 sent from the supply and demand adjustment server 100 via the communication network 5. The load monitoring control device 200 controls the power consumption of the general load equipment 40 and the charging and discharging of the storage battery 31 in response to the adjustment command received from the supply and demand adjustment server 100. The load monitoring control device 200 operates as follows in response to the adjustment command.

For example, FIG. 3A is an example of the operation of the load monitoring control device 200 when a "reduction DR" is received as an adjustment command from the supply and demand adjustment server 100. The horizontal axis of the illustrated graph is time, and the vertical axis is the load at the receiving point of the consumer 2 (the connection point between the smart meter 20 and the power system 3). In the figure, graph 311 shows the load at the receiving point when there is no "reduction DR", graph 312 shows the load (load reduced from graph 311) when the power consumption of the general load equipment 40 is controlled so as to become the target load of the received "reduction DR", and graph 313 shows the target load at the receiving point instructed by the received "reduction DR". In this case, the load monitoring control device 200 controls the charging or discharging of the charge/discharge control device 30 so that the load at the receiving point approaches the target load (graph 313), and aims to eliminate the difference between the load at the receiving point and the target load, which cannot be eliminated by controlling the general load equipment 40 alone.

Figure 3B is an example of the operation of the load monitoring control device 200 when an "upward DR" is received as an adjustment command from the supply and demand adjustment server 100. The horizontal axis of the illustrated graph is time, and the vertical axis is the load at the receiving point of the consumer 2. In the figure, graph 311 shows the load at the receiving point when there is no received "upward DR", graph 312 shows the load (load increased from graph 311) when the power consumption of the general load equipment 40 is controlled so as to become the target load of the received "upward DR", and graph 313 shows the target load at the receiving point indicated by the received "upward DR". In this case, the load monitoring control device 200 controls the charging or discharging of the storage battery 31 by the charge/discharge control device 30 so that the load at the receiving point approaches the target load (graph 313), and aims to eliminate the difference between the load at the receiving point and the target load, which cannot be eliminated by controlling the general load equipment 40 alone.

In addition, if the general load equipment 40 is, for example, an electric water heater that can only perform two-value control of on or off (100% load or 0% load), for example, the load monitoring control device 200 controls the on or off of the general load equipment 40 based on the time-integrated value of power consumption so that the load at the receiving point becomes the target load.

Figure 4 shows an example of on/off control when the general load equipment 40 is an electric water heater. This figure shows an example when a "downward DR" is received as an adjustment command from the supply and demand adjustment server 100. The horizontal axis of the graph shown in the figure is time, and the vertical axis is the load at the receiving point of the consumer 2.

In the figure, graph 411 is an example of the load at the receiving point when there is no "down DR", and graph 412 is an example of the power consumption of general load equipment 40 when the general load equipment 40 (electric water heater in the figure) is controlled on and off. Graph 413 shows the target load at the receiving point in the received "down DR", and graph 414 shows an example of control of charging or discharging the storage battery 31 to eliminate the difference between the receiving point load of consumer 2 and the target load. The load monitoring and control device 200 controls the charging or discharging of the storage battery 31 (graph 414) so that the difference between the load at the receiving point and the target load is eliminated, for example, by the time-integrated value of the power consumption during the evaluation period illustrated in the figure.

As described above, when the load monitoring control device 200 receives an adjustment command (e.g., a DR command) from the supply and demand adjustment server 100, it controls the general load equipment 40 (i.e., by using the general load equipment 40 to adjust the supply and demand balance) so that the load at the receiving point of the consumer 2 approaches the target load of the received adjustment command. In addition, the load monitoring control device 200 attempts to eliminate the difference between the load at the receiving point and the target load that cannot be eliminated by controlling the general load equipment 40 by controlling the charging or discharging of the storage battery 31 using the charge and discharge control device 30. In this way, according to the power supply and demand control system 1 of this embodiment, the general load equipment 40 can be used as a resource for adjusting the supply and demand of the power system 3 and the VPP, and can respond to adjustment commands from the supply and demand adjustment server 100 with high accuracy.

Figure 5 is a block diagram illustrating an example of the main functions of the supply and demand adjustment server 100. As shown in the figure, the supply and demand adjustment server 100 has the functions of a memory unit 110 and a supply and demand balance adjustment unit 125.

Of the above functions, the memory unit 110 stores power supply and demand status information 111. The power supply and demand status information 111 includes time series information on the amount of power supplied from various power generation facilities connected to the power grid 3, and time series information on the amount of power used based on measurement values sent from smart meters of consumers.

The supply and demand balance adjustment unit 125 determines whether or not a supply and demand balance adjustment is necessary based on the electricity supply and demand status information 111. If it is determined that a supply and demand balance adjustment is necessary, the supply and demand balance adjustment unit 125 plans a supply and demand balance adjustment method (control method) based on the electricity supply and demand status information 111, generates an adjustment command (e.g., a DR command) based on the planned adjustment method, and transmits it to the load monitoring and control device 200. Note that the supply and demand balance adjustment method is planned using, for example, a publicly known method (e.g., an algorithm for forecasting supply and demand based on past supply and demand records and weather conditions, etc.).

Figure 6 is a block diagram explaining the main functions of the load monitoring control device 200. As shown in the figure, the load monitoring control device 200 has the functions of a memory unit 210, an adjustment command receiving unit 220, a general load equipment control unit 225, a receiving point load acquisition unit 230, a difference calculation unit 235, a charge/discharge control unit 240, a storage battery SOC management unit 245, and an equipment information acquisition unit 250.

Of the above functions, the memory unit 210 stores the following information (data): adjustment command 211, receiving point load 212, difference information 213, storage battery SOC 214, and equipment information 215.

The adjustment command receiving unit 220 receives an adjustment command (e.g., a DR command) sent from the supply and demand adjustment server 100, and manages the received adjustment command as an adjustment command 211. The adjustment command includes information that can identify the target load.

The general load equipment control unit 225 controls the power consumption of the general load equipment 40. For example, the general load equipment control unit 225 directly controls the power consumption of the general load equipment 40 by sending control instructions to the general load equipment 40, such as to raise or lower the set temperature of an air conditioner during cooling operation, or to start (on) or stop (off) the heating operation of an electric water heater. Note that the general load equipment control unit 225 may be configured to indirectly control the power consumption of the general load equipment 40, for example, by presenting an instruction (message) to a user of the general load equipment 40, urging the user to change the power consumption of the general load equipment 40.

The receiving point load acquisition unit 230 acquires the real-time load at the receiving point of the consumer 2 (the load of the entire consumer 2) from the smart meter 20, etc., and manages the acquired load as the receiving point load 212.

The difference calculation unit 235 calculates the difference between the target load at the supply and demand point in the adjustment command and the current load at the supply and demand point of the consumer 2, and manages the calculated difference as difference information 213.

The charge/discharge control unit 240 controls the charging or discharging of the storage battery 31 according to the difference information 213 (so as to eliminate the difference between the target load at the supply and demand point and the current load at the demand point of the consumer 2).

The device information acquisition unit 250 acquires information about the general load equipment 40 (such as the load and operating status of each device) via the in-home communication network 6, and manages the acquired information as device information 215.

The battery SOC management unit 245 acquires the SOC (State Of Charge) of the battery 31 from the charge/discharge control unit 240, and manages the acquired SOC as the battery SOC 214. In addition, during a period when no adjustment command is received (a period when no control according to an adjustment command is being performed), the battery SOC management unit 245 controls charging or discharging by the charge/discharge control device 30 so that the SOC of the battery SOC 214 becomes a preset appropriate value. The appropriate value is set to a value (e.g., 50%) that can accommodate either a charge or discharge control command from the charge/discharge control device 30.

Figure 7 is a flowchart explaining the process performed by the load monitoring control device 200 (hereinafter referred to as "load control process S700"). Below, the load control process S700 will be explained with reference to the same figure.

The load monitoring control device 200 monitors (standby) in real time for the reception of an adjustment command (e.g., a lower DR, an upper DR) sent from the supply and demand adjustment server 100 (S711: NO). When the load monitoring control device 200 receives an adjustment command from the supply and demand adjustment server 100 (S711: YES), it starts controlling the power consumption of the general load equipment 40 in accordance with the received adjustment command (S712).

For example, if the received adjustment command is a "lower DR," the load monitoring control device 200 controls the general load equipment 40 so that the power consumption of the general load equipment 40 is reduced (for example, by raising the set temperature of an air conditioner in cooling operation, stopping (turning off) the heating operation of an electric water heater, etc.). Also, for example, if the received adjustment command is an "upper DR," the load monitoring control device 200 controls the general load equipment 40 so that the power consumption of the general load equipment 40 is increased (for example, by lowering the set temperature of an air conditioner in cooling operation, starting (turning on) the heating operation of an electric water heater, etc.).

The load monitoring control device 200 measures the load (total load) at the receiving point of the consumer 2 in real time (S713), and calculates the difference between the measured load and the target load of the received adjustment command (S714). The load monitoring control device 200 then determines a control amount for charging or discharging the storage battery 31 so that the calculated difference is eliminated (S715), and controls the charging or discharging of the storage battery 31 with the determined control amount (S716). The elimination of the difference may be performed, for example, within an evaluation period (a period during which the status of elimination of the difference is evaluated) (so that the difference is eliminated throughout the entire evaluation period).

The load monitoring control device 200 then determines whether the target period of the adjustment command has elapsed (whether the adjustment command has been released) (S717). If the target period of the adjustment command has not elapsed (S717: NO), the process returns to S713. If the target period of the adjustment command has elapsed (S717: YES), the process returns to S711.

As described above, according to the power supply and demand control system 1 of this embodiment, the operation of the general load equipment 40 is controlled to bring the load at the receiving point of the consumer 2 closer to the target load of the adjustment command sent from the supply and demand adjustment server 100. In addition, the difference between the load at the receiving point and the target load of the adjustment command, which cannot be eliminated by controlling the general load equipment 40, is eliminated by charging or discharging the storage battery 31. In this way, according to the power supply and demand control system 1 of this embodiment, the general load equipment 40 of the consumer 2 can be used to adjust the supply and demand balance of the power system 3, and the adjustment command can be strictly (accurately) responded to by charging or discharging the storage battery 31.

<Example of information processing device>
8 is an example of a hardware configuration of an information processing device used to realize the supply and demand adjustment server 100 and the load monitoring control device 200. The illustrated information processing device 10 includes a processor 11, a main memory device 12, an auxiliary memory device 13, an input device 14, an output device 15, and a communication device 16. Specific examples of the information processing device 10 include personal computers, office computers, various server devices, general-purpose machines, and the like. The information processing device 10 may be realized in whole or in part using virtual information processing resources provided using virtualization technology, such as a virtual server provided by a cloud system. The supply and demand adjustment server 100 and the load monitoring control device 200 may be realized using a plurality of information processing devices 10 connected to each other so as to be able to communicate with each other.

In the figure, the processor 11 is configured using, for example, a CPU (Central Processing Unit), an MPU (Micro Processing Unit), a GPU (Graphics Processing Unit), an FPGA (Field Programmable Gate Array), an ASIC (Application Specific Integrated Circuit), an AI (Artificial Intelligence) chip, etc.

The main memory device 12 is a device that stores programs and data, and is, for example, a read only memory (ROM), a random access memory (RAM), or a non-volatile memory (NVRAM (Non Volatile RAM)).

The auxiliary storage device 13 is, for example, an SSD (Solid State Drive), a hard disk drive, an optical storage device (CD (Compact Disc), DVD (Digital Versatile Disc), etc.), a storage system, an IC card, a read/write device for a recording medium such as an SD card or an optical recording medium, a storage area of a cloud server, etc. Programs and data can be read into the auxiliary storage device 13 via a recording medium reader or a communication device 16. Programs and data stored (memorized) in the auxiliary storage device 13 are read into the main storage device 12 as needed.

The input device 14 is an interface that accepts input of various information (device information, etc.) from the outside, and is, for example, a keyboard, a mouse, a touch panel, a card reader, a pen-input tablet, a voice input device, etc.

The output device 15 is an interface that outputs various information such as the progress and results of processing, various control information, control commands, etc. The output device 15 is, for example, a display device (LCD (Liquid Crystal Display), graphics card, etc.) that visualizes the various information described above, a device that converts the various information described above into audio (audio output device (speaker, etc.)), or a device that converts the various information described above into text (printer, etc.). Note that, for example, the information processing device 10 may be configured to input and output information to and from other devices via the communication device 16.

The input device 14 and output device 15 constitute a user interface that accepts information from the user and presents information.

The communication device 16 is a device that realizes communication (wired communication or wireless communication) with other devices via a communication infrastructure such as the communication network 5, and is configured using, for example, a NIC (Network Interface Card), a wireless communication module, a USB module, etc.

The information processing device 10 may be equipped with, for example, an operating system, a file system, a DBMS (DataBase Management System) (relational database, NoSQL, etc.), a KVS (Key-Value Store), etc.

The functions of the supply and demand adjustment server 100 and the load monitoring control device 200 are realized by the processor 11 of the information processing device 10 reading and executing a program stored in the main memory device 12, or by the functions of the hardware (FPGA, ASIC, AI chip, etc.) that constitutes the supply and demand adjustment server 100 and the load monitoring control device 200. The supply and demand adjustment server 100 and the load monitoring control device 200 store the various information (data) described above, for example, as a database table or a file managed by a file system.

Although the embodiments of the present invention have been described above in detail, the above description is provided to facilitate understanding of the present invention and does not limit the present invention. The present invention may be modified or improved without departing from its spirit, and the present invention naturally includes equivalents. For example, the above embodiments have been described in detail to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all of the configurations described. In addition, it is possible to add, delete, or replace part of the configuration of the above embodiments with other configurations.

For example, the general load equipment 40 is not limited to the above-mentioned equipment, but may be other types of equipment (electric stove, heated carpet, electric dryer, electric underfloor heating, food waste disposal machine, etc.).

1 Power supply and demand control system, 2 Consumer, 3 Power system, 5 Communication network, 6 Home communication network, 7 Home wiring, 20 Smart meter, 30 Charge and discharge control device, 31 Storage battery, 40 General load equipment, 100 Supply and demand adjustment server, 111 Power supply and demand status information, 110 Memory unit, 125 Supply and demand balance adjustment unit, 200 Load monitoring and control device, 210 Memory unit, 211 Adjustment command, 212 Receiving point load, 213 Difference information, 214 Storage battery SOC, 220 Adjustment command receiving unit, 225 General load equipment control unit, 230 Receiving point load acquisition unit, 235 Difference calculation unit, 240 Charge and discharge control unit, 245 Storage battery SOC management unit, S700 Load control processing

Claims (11)

An electric power supply and demand control system that adjusts the supply and demand balance of an electric power system by using equipment present in a consumer connected to the electric power system,
The facility includes general load equipment and a storage battery connected to the power grid, and a charge/discharge control device that controls charging and discharging of the storage battery;
A load monitoring control device is an information processing device that is communicatively connected to the general load equipment and the charge/discharge control device and has a processor and a storage device,
The load monitoring and control device includes:
A power grid control system that controls the power grid is connected to a supply and demand adjustment server so that the power grid control system can communicate with the supply and demand adjustment server.
receiving a load adjustment command for the consumer from the supply and demand adjustment server;
Obtaining a load measurement value at a receiving point of the consumer;
Controlling the operation of the general load equipment so that the load becomes the target load of the adjustment command;
By controlling the charge/discharge control device, the storage battery is charged or discharged so as to eliminate a difference between the load and the target load, which cannot be eliminated by controlling the general load equipment.
Electricity supply and demand control system. The power supply and demand control system according to claim 1,
The adjustment command is a down demand response (DR),
The load monitoring and control device includes:
Controlling the operation of the general load equipment so as to reduce the load at the customer's receiving point;
Charging or discharging the storage battery so as to eliminate the difference.
Electricity supply and demand control system. The power supply and demand control system according to claim 1,
The adjustment command is an increase DR (Demand Response),
The load monitoring and control device includes:
Controlling the operation of the general load equipment so as to increase the load at the customer's receiving point;
Charging or discharging the storage battery so as to eliminate the difference.
Electricity supply and demand control system. The power supply and demand control system according to claim 1,
The general load equipment is at least one of an air conditioner, a heat pump water heater, an electric water heater, an electric stove, a heated carpet, an electric dryer, an electric floor heating device, and a food waste disposal machine.
Electricity supply and demand control system. The power supply and demand control system according to claim 1,
The general load equipment is equipment that is subjected to binary control of on or off,
the load monitoring and control device controls the operation of the general load equipment based on a time-integrated value of the power consumption of the general load equipment so that the load becomes a target load of the adjustment command.
Electricity supply and demand control system. The power supply and demand control system according to claim 5,
The general load equipment is an electric water heater,
Electricity supply and demand control system. The power supply and demand control system according to claim 1,
The general load facility functions as a resource for adjusting the supply and demand balance of a VPP (Virtual Power Plant) constituting the power system.
Electricity supply and demand control system. A power supply and demand control method for adjusting a supply and demand balance of a power system by a facility present in a consumer connected to the power system, comprising:
The facility includes general load equipment and a storage battery connected to the power grid, and a charge/discharge control device that controls charging and discharging of the storage battery;
A load monitoring control device which is an information processing device connected to the general load equipment and the charge/discharge control device in a communicable manner and has a processor and a storage device,
receiving a load adjustment command for the consumer from a supply and demand adjustment server that adjusts supply and demand in the power system;
Obtaining a load measurement at the customer's point of supply;
Controlling the operation of the general load equipment so that the load becomes a target load of the adjustment command; and
A step of charging or discharging the storage battery by controlling the charge/discharge control device so as to eliminate a difference between the load and the target load, which cannot be eliminated by controlling the general load equipment;
The power supply and demand control method includes: The power supply and demand control method according to claim 8,
The adjustment command is a down demand response (DR),
The load monitoring control device,
Controlling operation of the general load equipment to reduce load at the customer's point of supply; and
Charging or discharging the storage battery so as to eliminate the difference;
The power supply and demand control method includes: The power supply and demand control method according to claim 8,
The adjustment command is an increase DR (Demand Response),
The load monitoring control device,
Controlling operation of the general load equipment to increase the load at the customer's point of receipt; and
Charging or discharging the storage battery so as to eliminate the difference;
The power supply and demand control method includes: The power supply and demand control method according to claim 8,
The general load equipment is equipment that is subjected to binary control of on or off,
a step of the load monitoring and control device controlling the operation of the general load equipment based on a time-integrated value of power consumption of the general load equipment so that the load becomes a target load of the adjustment command;
The power supply and demand control method includes:

Images