Power supply and demand control system and power supply and demand control method

Abstract

To make it possible to use equipment at consumers whose power consumption is difficult to control, as a resource for adjusting the supply and demand balance in a power grid.SOLUTION: A power supply and demand control system adjusts the supply and demand balance of a power grid using equipment at the consumer's site. The equipment includes general load equipment and a storage battery connected to the power grid, 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 adjustment commands for the consumer's load from a power grid's supply and demand adjustment server, obtains measured values of the load at the consumer's receiving point, and controls the operation of the general load equipment such that the load becomes a target load of the adjustment command. The load monitoring control device also 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 DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a power supply and demand control system and a power supply and demand control method, and particularly to a technique for controlling the supply and demand balance of a power grid.

Background Art

[0002] In recent years, with the introduction of renewable energy whose power generation amount is easily affected by natural conditions such as solar power generation and wind power generation, and the spread of distributed energy resources (hereinafter referred to as "resources") such as cogeneration and storage batteries on the consumer side, the importance of energy management considering the power supply and demand balance has been increasing. Against this background, the so-called VPP (Virtual Power Plant) that adjusts the power supply and demand balance by aggregating and remotely / integratingly controlling (aggregating) distributed resources existing on the consumer side such as factories and homes using IoT has been studied / constructed, and various technologies have been proposed.

[0003] For example, Patent Document 1 describes a power control system configured for the purpose of controlling resources that are easily accepted by consumers. The power control system controls the resources installed in a facility based on a specific command and provides an adjustment power or a selling power related to the power supply and demand. The power control system acquires a specific command, acquires power reception information related to the received power in the facility, determines whether the direction of control over the resources of the facility corresponds to the upward direction from the specific command and the power reception information, and determines whether to implement the control over the resources when it is determined that it corresponds to the upward direction.

[0004] For example, Patent Document 2 describes a demand response system configured for the purpose of achieving high-precision demand response. The demand response system comprises a first aggregator device that performs demand response-related control of a first group of equipment including a first heat pump device, a second aggregator device that performs demand response-related control of a second group of equipment different from the first group of equipment, and a first higher-level aggregator device that transmits energy adjustment requests to the first and second aggregator devices. The first aggregator device performs demand response-related control of the first group of equipment installed in multiple buildings using a first dedicated command for the first group of equipment in response to an energy adjustment request. The second aggregator device performs demand response-related control of the second group of equipment installed in multiple buildings using a second dedicated command for the second group of equipment, which is different from the first dedicated command, in response to an energy adjustment request. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] International Publication No. 2020 / 261797 [Patent Document 2] Japanese Patent Publication No. 2014-236580 [Overview of the project] [Problems that the invention aims to solve]

[0006] Currently, the equipment primarily used as resources in VPPs is equipment that allows for control of 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, heat pump water heaters, and electric water heaters, also consume relatively large amounts of power and are expected to be utilized as VPP resources, but there are the following challenges. For example, while it is possible to control the power consumption of air conditioners and heat pump water heaters to some extent through room temperature settings and shift functions, it is difficult to strictly control them as VPP resources because it is necessary to ensure the freedom of use for the user. Also, while it is possible to raise or lower the power consumption of electric water heaters by on / off control, it is usually a binary control (100% load or 0% load), making it difficult to strictly control power consumption in response to adjustment commands such as DR commands.

[0007] This invention was made in view of the above background, and aims to provide a power supply and demand control system and a power supply and demand control method that enable the use of equipment whose power consumption is difficult to control (set, control) and predict as a resource for adjusting the supply and demand balance of the power grid. [Means for solving the problem]

[0008] One of the present inventions for achieving the above objective is a power supply and demand control system that adjusts the supply and demand balance of a power system by equipment present at a consumer connected to the power system, wherein the equipment includes general load equipment and a storage battery connected to the power system, and a charge / discharge control device that controls the charging and discharging of the storage battery, and comprises a load monitoring control device which is an information processing device having a processor and a storage device and is communicably connected to the general load equipment and the charge / discharge control device, wherein the load monitoring control device is communicably connected to a supply and demand adjustment server that adjusts the supply and demand of the power system, receives load adjustment commands for the consumer from the supply and demand adjustment server, and at the consumer's point of supply and demand real timeThe system acquires measured load values, controls the operation of the general load equipment and the charge / discharge control device so that the load becomes the target load specified in the adjustment command, thereby charging or discharging the battery to eliminate the difference between the load and the target load that cannot be resolved by controlling the general load equipment.

[0009] Further details regarding the problems disclosed in this application, and their solutions, will be made clear in the section on embodiments for carrying out the invention and in the drawings. [Effects of the Invention]

[0010] 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. [Brief explanation of the drawing]

[0011] [Figure 1] This is a diagram illustrating the general configuration of a power supply and demand control system. [Figure 2] This diagram shows the main equipment configurations at customer sites. [Figure 3A] This is an example of load control when a "downward DR" command is received from the supply and demand adjustment server. [Figure 3B] This is an example of load control when a "higher load demand response" command is received from the supply and demand adjustment server. [Figure 4] This is an example of load control when the general load equipment is an electric water heater. [Figure 5] This diagram illustrates the main functions of a supply and demand adjustment server. [Figure 6] This diagram illustrates the main functions of a load monitoring and control device. [Figure 7] This is a flowchart explaining the load control process. [Figure 8] This is an example of the hardware configuration of an information processing device used to implement a supply and demand adjustment server and a load monitoring and control device. [Modes for carrying out the invention]

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the character "S" attached before a reference numeral means a processing step.

[0013] FIG. 1 shows a schematic configuration of a power supply and demand control system 1 shown as an embodiment of the present invention. As shown in the figure, the 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.

[0014] Various facilities constituting the power grid 3, the consumer 2, and the supply and demand adjustment server 100 are communicably connected via a communication network 5. The communication network 5 is a communication infrastructure that realizes communication by a wired or wireless method, and 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, dedicated lines, and the like.

[0015] The power grid 3 includes, for example, conventional power generation facilities such as thermal power generation facilities, and renewable energy utilization type power generation facilities such as wind power generation facilities and photovoltaic power generation facilities (PV). The power grid 3 includes a function as a VPP (Virtual Power Plant) and uses the facilities of the consumer 2 as resources of the VPP.

[0016] The supply and demand adjustment server 100 is an information processing device operated by the operators of the power system 3, such as transmission and distribution companies (general transmission and distribution companies, aggregation companies, etc.). The supply and demand adjustment server 100 acquires real-time power supply amounts from various power generation facilities connected to the power system 3 and real-time power usage amounts based on measurements from smart meters installed at each consumer 2 connected to the power system 3. Based on the acquired supply and usage amounts, it adjusts the power supply and demand balance in the power system 3 (load leveling, absorption of excess renewable energy supply, supply of necessary power during power shortages, etc.). For example, if the operator is a general transmission and distribution company, the supply and demand adjustment server 100 performs the above adjustments using, for example, real-time supply and demand information at the substation level. Also, for example, if the operator is an aggregation company, the supply and demand adjustment server 100 performs the above adjustments using, for example, measurements acquired from smart meters, etc. The above adjustments are carried out, for example, by forecasting (power generation plan) based on historically accumulated information (supply and demand information, weather information, etc.), weather forecast information, or demand forecast information, supplementing the above forecasts based on observed values ​​(actual values) (output adjustment, procurement from the market, etc.), and adjusting the output of generators according to frequency (high-speed output adjustment such as governor-free). The supply and demand adjustment server 100 may, for example, function as an EMS (Energy Management System).

[0017] The supply and demand adjustment server 100 adjusts the balance of electricity supply and demand in the power grid 3, for example, through Demand Response (DR). The supply and demand adjustment server 100 functions as an aggregator server in the VPP and, for example, sends a command to customer 2 to encourage charging of the battery 31 in order to consume the excess output of renewable energy (hereinafter referred to as "up DR"). Also, for example, when there is a shortage of electricity supply, such as during peak demand for electricity, the supply and demand adjustment server 100 sends a command to customer 2 to encourage discharging of the battery 31 (supply to the power grid 3) (hereinafter referred to as "down DR").

[0018] Fig. 2 shows the main equipment configuration in the consumer 2. As shown in the figure, in the consumer 2, a smart meter 20, a load monitoring and control device 200, a storage battery 31, a charge / discharge control device 30, and a general load equipment 40 are installed. 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 supply from the power grid 3 etc. via the in-house wiring 7.

[0019] The smart meter 20 and the load monitoring and control device 200 are directly or indirectly communicably connected to the supply-demand adjustment server 100 and the power grid 3 via the communication network 5. Note that the communication form between the smart meter 20 and the load monitoring and control device 200 and the supply-demand adjustment server 100 and the power grid 3 is not necessarily limited. The load monitoring and control device 200 is communicably connected to the smart meter 20, the charge / discharge control device 30, and the general load equipment 40 via the in-house communication network 6. The in-house communication network 6 is a communication infrastructure that realizes communication by a wired or wireless method, for example, LAN, WAN, wireless LAN, power line communication network, etc. In the in-house communication network 6, communication conforming to a standard such as ECHONET (registered trademark) is performed, for example. The load monitoring and control device 200 may function as a so-called HEMS (Home Energy Management System) server etc. (including a HEMS gateway etc.).

[0020] The smart meter 20 is equipped with various measuring devices such as a timing device, a voltmeter, and an ammeter, and measures the load (power consumption) in the consumer 2, the power supplied from the power grid 3 to the consumer 2, the power provided from the consumer 2 to the power grid 3, etc., and notifies (transmits) the time-series measurement values to the load monitoring and control device 200 in real time. Note that in this embodiment, the smart meter 20 is shown as an example of a device having such functions, but any device other than the smart meter 20 (such as a device having functions equivalent to or higher than those of the exemplified smart meter 20 and further equipped with other types of sensors) may be used as long as it has functions equivalent to or higher than those of the smart meter 20.

[0021] The charge / discharge control device 30 charges the battery 31 using power supplied via the in-house wiring 7. The charge / discharge control device 30 also supplies power (discharge power) from the battery 31 to the in-house wiring 7. The battery 31 is a secondary battery such as a lithium-ion secondary battery, nickel-metal hydride battery, or lead-acid battery.

[0022] The charge / discharge control device 30 controls the charging or discharging of the 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 regarding the state of the battery 31 (such as the charging voltage, discharge voltage, and SOC (State of Charge) of the battery 31) to the load monitoring control device 200.

[0023] General load equipment 40 is load equipment present at customer 2 that cannot resolve the difference between the load and the target load on its own, and is such as low-voltage equipment or general household equipment (air conditioners (hereinafter referred to as "air conditioners"), heat pump water heaters (including those so-called "Air To Water"), electric water heaters (electric water heaters), etc.). General load equipment 40 controls its own operation (for example, setting the temperature or airflow for air conditioners or heat pump water heaters, or turning the power on or off for electric water heaters) in response to instructions from the load monitoring and control device 200.

[0024] The load monitoring and control device 200 obtains the load of customer 2 (the load at the point of supply and demand with the power system 3 (the total load of customer 2)) from the smart meter 20. The load monitoring and control device 200 also receives supply and demand balance adjustment commands for the power system 3, which are sent from the supply and demand adjustment server 100 via the communication network 5. The load monitoring and control device 200 controls the power consumption of general load equipment 40 and the charging and discharging of the storage battery 31 in accordance with the adjustment commands received from the supply and demand adjustment server 100. The load monitoring and control device 200 operates as follows in response to the above adjustment commands.

[0025] For example, Figure 3A shows an example of the operation of the load monitoring and control device 200 when it receives a "down DR" as an adjustment command from the supply and demand adjustment server 100. In the example graph, the horizontal axis represents time, and the vertical axis represents the load at the customer 2's supply and demand point (the connection point between the smart meter 20 and the power system 3). In the same figure, graph 311 shows the load at the supply and demand point when there is no "down DR", graph 312 shows the load (reduced from graph 311) when the power consumption of the general load equipment 40 is controlled to become the target load of the received "down DR", and graph 313 shows the target load at the supply and demand point instructed by the received "down DR". In this case, the load monitoring and control device 200 controls the charging or discharging of the charge / discharging control device 30 so that the load at the supply and demand point approaches the target load (graph 313), and attempts to eliminate the difference between the load at the supply and demand point and the target load, which cannot be resolved by controlling the general load equipment 40 alone.

[0026] Figure 3B shows an example of the operation of the load monitoring and control device 200 when it receives an "increase DR" as an adjustment command from the supply and demand adjustment server 100. In the example graph, the horizontal axis represents time, and the vertical axis represents the load at the supply and demand point of consumer 2. In the figure, graph 311 shows the load at the supply and demand point when no "increase DR" is received, graph 312 shows the load (increased from graph 311) when the power consumption of the general load equipment 40 is controlled to become the target load of the received "increase DR", and graph 313 shows the target load at the supply and demand point indicated by the received "increase DR". In this case, the load monitoring and 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 supply and demand point approaches the target load (graph 313), thereby eliminating the difference between the load at the supply and demand point and the target load, which cannot be resolved by controlling the general load equipment 40 alone.

[0027] Furthermore, if the general load equipment 40 is such that it can only be controlled in two ways (100% load or 0% load), such as an electric water heater, the load monitoring and control device 200 will, for example, control the general load equipment 40 to turn on or off based on the time-integrated value of power consumption, so that the load at the point of supply becomes the target load.

[0028] 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 where a "down DR" is received as an adjustment command from the supply and demand adjustment server 100. In the graph shown in the figure, the horizontal axis represents time, and the vertical axis represents the load at the supply and demand point of consumer 2.

[0029] In the figure, Graph 411 shows an example of the load at the point of supply when there is no "downward DR," and Graph 412 shows an example of the power consumption of the general load equipment 40 (electric water heater in the figure) when the general load equipment 40 is controlled on and off. Furthermore, Graph 413 shows the target load at the point of supply in the received "downward DR," and Graph 414 shows an example of controlling the charging or discharging of the battery 31 to eliminate the difference between the load at the point of supply and the target load of consumer 2. The load monitoring and control device 200 controls the charging or discharging of the battery 31 (Graph 414), for example, by the time-integrated value of the power consumption during the evaluation period illustrated in the figure, so that the difference between the load at the point of supply and the target load is eliminated.

[0030] As described above, when the load monitoring and 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 point of supply and demand of the consumer 2 approaches the target load of the received adjustment command. Furthermore, for any difference between the load at the point of supply and demand and the target load that cannot be resolved by controlling the general load equipment 40, the load monitoring and control device 200 attempts to resolve it by controlling the charging or discharging of the battery 31 using the charge / discharge control device 30. In this way, the power supply and demand control system 1 of this embodiment can utilize the general load equipment 40 as a resource for adjusting the supply and demand of the power grid 3 and VPP, and can respond accurately to adjustment commands from the supply and demand adjustment server 100.

[0031] 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 includes the functions of the storage unit 110 and the supply and demand balance adjustment unit 125.

[0032] Of the above functions, the storage unit 110 stores power supply and demand information 111. The power supply and demand information 111 includes time-series information on the amount of electricity supplied from various power generation facilities connected to the power grid 3, and time-series information on the amount of electricity used based on measured values ​​sent from smart meters of consumers.

[0033] The supply-demand balance adjustment unit 125 determines whether or not adjustment of the supply-demand balance is necessary based on the power supply-demand status information 111. If it determines that adjustment of the supply-demand balance is necessary, the supply-demand balance adjustment unit 125 devises a method for adjusting the supply-demand balance (control method) based on the power supply-demand status information 111, generates an adjustment command (e.g., a DR command) based on the devised adjustment method, and transmits it to the load monitoring and control device 200. The method for adjusting the supply-demand balance is devised using, for example, a known method (e.g., an algorithm that forecasts supply and demand based on past supply and demand performance and weather conditions).

[0034] Figure 6 is a block diagram illustrating the main functions of the load monitoring and control device 200. As shown in the figure, the load monitoring and control device 200 includes the following functions: a storage unit 210, an adjustment command receiving unit 220, a general load equipment control unit 225, a supply / receive point load acquisition unit 230, a difference calculation unit 235, a charge / discharge control unit 240, a battery SOC management unit 245, and an equipment information acquisition unit 250.

[0035] Of the above functions, the memory unit 210 stores information (data) for adjustment commands 211, power supply point load 212, differential information 213, battery SOC 214, and equipment information 215.

[0036] The adjustment command receiving unit 220 receives adjustment commands (e.g., DR commands) sent from the supply and demand adjustment server 100 and manages the received adjustment commands as adjustment commands 211. The adjustment commands include information that can identify the target load.

[0037] 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 raising or lowering the set temperature of an air conditioner during cooling operation, or starting (turning on) or stopping (turning off) the heating operation of an electric water heater. Alternatively, the general load equipment control unit 225 may indirectly control the power consumption of the general load equipment 40 by, for example, presenting an instruction (message) to the user of the general load equipment 40 prompting them to change the power consumption of the general load equipment 40.

[0038] The supply-receiving point load acquisition unit 230 acquires the real-time load at the supply-receiving point of customer 2 (the total load of customer 2) from the smart meter 20, etc., and manages the acquired load as the supply-receiving point load 212.

[0039] The difference calculation unit 235 calculates the difference between the target load at the supply and demand point in the adjustment command and the load at the current supply and demand point of customer 2, and manages the calculated difference as difference information 213.

[0040] The charge / discharge control unit 240 controls the charging or discharging of the battery 31 according to the difference information 213 (so that the difference between the target load at the supply / demand point and the load at the current supply / demand point of consumer 2 is eliminated).

[0041] 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.

[0042] The battery SOC management unit 245 acquires the State of Charge (SOC) of the battery 31 from the charge / discharge control unit 240 and manages the acquired SOC as the battery SOC 214. Furthermore, during periods when no adjustment command is received (periods when control is not being performed in response to an adjustment command), the battery SOC management unit 245 controls the charging or discharging by the charge / discharge control device 30 so that the SOC of the battery SOC 214 reaches a preset appropriate value. This appropriate value is set to a value (for example, 50%) that can be handled by either a charge or discharge control command from the charge / discharge control device 30.

[0043] Figure 7 is a flowchart illustrating the processing performed by the load monitoring and control device 200 (hereinafter referred to as "load control processing S700"). The load control processing S700 will be explained below in conjunction with this figure.

[0044] The load monitoring control device 200 monitors (stands) in real time for receiving adjustment commands (e.g., downward DR, upward 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 according to the received adjustment command (S712).

[0045] For example, if the received adjustment command is "down DR", the load monitoring and control device 200 controls the general load equipment 40 so that its power consumption decreases (for example, raising the set temperature of the air conditioner during cooling operation, or stopping (turning off) the heating operation of the electric water heater). Also, for example, if the received adjustment command is "up DR", the load monitoring and control device 200 controls the general load equipment 40 so that its power consumption increases (for example, lowering the set temperature of the air conditioner during cooling operation, or starting (turning on) the heating operation of the electric water heater).

[0046] The load monitoring and control device 200 measures the load at the customer's supply point (total load) 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 and control device 200 then determines the control amount for charging or discharging the battery 31 so that the calculated difference is eliminated (S715), and controls the charging or discharging of the battery 31 with the determined control amount (S716). Note that the elimination of the difference may be performed, for example, within the evaluation period (a period for evaluating the status of the elimination of the difference) (so that the difference is eliminated over the entire evaluation period).

[0047] Next, the load monitoring and control device 200 determines whether the period covered by the adjustment command has elapsed (whether the adjustment command has been canceled) (S717). If the period covered by the adjustment command has not elapsed (S717: NO), the process returns to S713. If the period covered by the adjustment command has elapsed (S717: YES), the process returns to S711.

[0048] As described above, the power supply and demand control system 1 of this embodiment controls the operation of the general load equipment 40 to bring the load at the consumer's point of supply and demand closer to the target load of the adjustment command sent from the supply and demand adjustment server 100. Furthermore, any difference between the load at the point of supply and demand and the target load of the adjustment command, which cannot be resolved by controlling the general load equipment 40, is resolved by charging or discharging the battery 31. In this way, the power supply and demand control system 1 of this embodiment allows the consumer's general load equipment 40 to be used to adjust the supply and demand balance of the power system 3, and enables a precise response to the adjustment command by charging or discharging the battery 31.

[0049] <Example of an information processing device> Figure 8 shows an example of the hardware configuration of an information processing device used to realize a supply and demand adjustment server 100 and a load monitoring and control device 200. The illustrated information processing device 10 comprises a processor 11, main memory 12, auxiliary memory 13, input device 14, output device 15, and communication device 16. Specific examples of the information processing device 10 include, for example, personal computers, office computers, various server devices, and general-purpose computers. The information processing device 10 may be implemented, 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 and control device 200 may be implemented using multiple information processing devices 10 that are connected to each other in a communicative manner.

[0050] In the figure, the processor 11 is composed of, 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.

[0051] The main memory 12 is a device for storing programs and data, and is, for example, ROM (Read Only Memory), RAM (Random Access Memory), or non-volatile memory (NVRAM (Non-Volatile RAM)).

[0052] The auxiliary storage device 13 includes, 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 reader / writer for recording media such as SD cards and optical recording media, and the storage area of ​​a cloud server. Programs and data can be read into the auxiliary storage device 13 via a recording media reader or a communication device 16. Programs and data stored in the auxiliary storage device 13 are read into the main memory 12 as needed.

[0053] The input device 14 is an interface that accepts various types of information (such as device information) from the outside, and can be, for example, a keyboard, mouse, touch panel, card reader, pen-input tablet, or voice input device.

[0054] The output device 15 is an interface that outputs various information such as processing progress and processing results, various control information, and control commands. The output device 15 may be, for example, a display device that visualizes the above-mentioned information (LCD (Liquid Crystal Display), graphics card, etc.), a device that converts the above-mentioned information into sound (speaker, etc.), or a device that converts the above-mentioned information into text (printer, etc.). Alternatively, 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.

[0055] The input device 14 and the output device 15 constitute a user interface for receiving and presenting information with the user.

[0056] The communication device 16 is a device that enables communication (wired 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.

[0057] The information processing device 10 may have, for example, an operating system, a file system, a DBMS (Database Management System) (relational database, NoSQL, etc.), a KVS (Key-Value Store), etc. installed on it.

[0058] 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 programs stored in the main memory 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 themselves. The supply and demand adjustment server 100 and the load monitoring control device 200 store the aforementioned various types of information (data) as, for example, database tables or files managed by a file system.

[0059] The embodiments of the present invention have been described in detail above, but this description is for the purpose of facilitating understanding of the present invention and does not limit it. The present invention can be modified and improved without departing from its spirit, and of course, equivalents thereof are included in the present invention. For example, the above embodiments have been described in detail for the purpose of explaining the present invention in an easy-to-understand manner and are not necessarily limited to those having all the configurations described. Furthermore, it is possible to add, delete, or replace some of the configurations of the above embodiments with other configurations.

[0060] For example, the general load equipment 40 is not limited to those mentioned above, but may also include other types of equipment (electric heaters, heated carpets, electric dryers, electric floor heating, food waste disposers, etc.). [Explanation of Symbols]

[0061] 1 Power supply and demand control system, 2 Consumer, 3 Power grid, 5 Communication network, 6 In-house communication network, 7 In-house wiring, 20 Smart meter, 30 Charge / discharge control device, 31 Storage battery, 40 General load equipment, 100 Supply and demand adjustment server, 111 Power supply and demand status information, 110 Storage unit, 125 Supply and demand balance adjustment unit, 200 Load monitoring and control device, 210 Storage unit, 211 Adjustment command, 212 Load point load, 213 Difference information, 214 Storage battery SOC, 220 Adjustment command receiving unit, 225 General load equipment control unit, 230 Load point load acquisition unit, 235 Difference calculation unit, 240 Charge / discharge control unit, 245 Storage battery SOC management unit, S700 Load control processing

Claims

1. A power supply and demand control system that adjusts the supply and demand balance of the power grid using equipment located at consumers connected to the power grid, The equipment includes general load equipment and a storage battery connected to the power grid, and a charge / discharge control device for controlling the charging and discharging of the storage battery. The load monitoring control device is an information processing device having a processor and a storage device, and is communicably connected to the general load equipment and the charge / discharge control device. The aforementioned load monitoring and control device is It is connected in a way that allows it to communicate with a supply and demand adjustment server that adjusts the supply and demand of the aforementioned power system, The supply and demand adjustment server receives a command to adjust the load of the customer, By acquiring real-time load measurements at the customer's point of supply and demand, The operation of the general load equipment is controlled so that the load becomes the target load of the adjustment command. By controlling the charge / discharge control device, the battery is charged or discharged in such a way that the difference between the load and the target load, which cannot be resolved by controlling the general load equipment, is eliminated. Power supply and demand control system.

2. A power supply and demand control system according to claim 1, The aforementioned adjustment command is a downward DR (Demand Response), The aforementioned load monitoring and control device is The operation of the general load equipment is controlled to reduce the load at the consumer's point of supply and demand, To eliminate the aforementioned difference, the storage battery is charged or discharged. Power supply and demand control system.

3. A power supply and demand control system according to claim 1, The aforementioned adjustment command is an upward DR (Demand Response), The aforementioned load monitoring and control device is The operation of the general load equipment is controlled to increase the load at the consumer's point of supply and demand, To eliminate the aforementioned difference, the storage battery is charged or discharged. Power supply and demand control system.

4. A power supply and demand control system according to claim 1, The aforementioned general load equipment is at least one of the following: 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 system, and a food waste disposer. Power supply and demand control system.

5. A power supply and demand control system according to claim 1, The aforementioned general load equipment is equipment that is controlled by a binary on / off switch. The load monitoring and control device controls the operation of the general load equipment based on the time-integrated value of the power consumption of the general load equipment so that the load becomes the target load of the adjustment command. Power supply and demand control system.

6. A power supply and demand control system according to claim 5, The aforementioned general load equipment is an electric water heater. Power supply and demand control system.

7. A power supply and demand control system according to claim 1, The aforementioned general load equipment functions as a resource for adjusting the supply and demand balance of the VPP (Virtual Power Plant) that constitutes the power system. Power supply and demand control system.

8. A power supply and demand control method that adjusts the supply and demand balance of the power system by using equipment located at a consumer connected to the power system, The equipment includes general load equipment and a storage battery connected to the power grid, and a charge / discharge control device for controlling the charging and discharging of the storage battery. A load monitoring control device, which is an information processing device having a processor and a storage device, is communicably connected to the general load equipment and the charge / discharge control device, The step of receiving a load adjustment command from a power supply adjustment server that adjusts the supply and demand of the power system, A step of obtaining real-time load measurements at the consumer's point of supply and demand, A step of controlling the operation of the general load equipment so that the load becomes the target load of the adjustment command, and The charge / discharge control device is controlled to charge or discharge the battery in order to eliminate the difference between the load and the target load, which cannot be eliminated by controlling the general load equipment. A power supply and demand control method that performs this operation.

9. A power supply and demand control method according to claim 8, The aforementioned adjustment command is a downward DR (Demand Response), The aforementioned load monitoring and control device A step of controlling the operation of the general load equipment in order to reduce the load at the consumer's point of supply and demand, and The steps of charging or discharging the storage battery so that the aforementioned difference is resolved, A power supply and demand control method that performs this operation.

10. A power supply and demand control method according to claim 8, The aforementioned adjustment command is an upward DR (Demand Response), The aforementioned load monitoring and control device A step of controlling the operation of the general load equipment to increase the load at the consumer's point of supply and demand, and The steps of charging or discharging the storage battery so that the aforementioned difference is resolved, A power supply and demand control method that performs this operation.

11. A power supply and demand control method according to claim 8, The aforementioned general load equipment is equipment that is controlled by a binary on / off switch. The load monitoring and control device controls the operation of the general load equipment based on the time-integrated value of the power consumption of the general load equipment so that the load becomes the target load of the adjustment command. A power supply and demand control method that performs this operation.

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