Power supply and demand adjusting system, and power supply and demand adjusting method

Abstract

To enable a customer to appropriately respond to a DR request.SOLUTION: A supply and demand adjusting system 10 adjusts power supply and demand of a customer 20 having a power storage facility 22. The supply and demand adjusting system comprises a computer having a memory and a processor. In the memory, demand response event information 30 including an event related to power supply and demand adjustment is stored. The processor transmits, to the customer, a request for changing a power storage facility operation schedule 24 of the power storage facility in accordance with an adjustment amount of power consumption required of the customer on the basis of the demand response event information and the like.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an electric power supply and demand adjustment system and an electric power supply and demand adjustment method. [Background technology]

[0002] In order to compensate for the instability of renewable energy sources such as photovoltaics (PV) and to stabilize the balance between supply and demand of electricity while reducing the burden on the environment, an initiative called demand response (DR) is being undertaken.

[0003] DR is an initiative in which consumers or third parties who own energy resources such as energy storage systems control their energy resources and power consumption according to request, and provide the resulting difference in power as adjustment power to maintain the supply-demand balance in exchange for payment. Consumers who consume large amounts of power based on production plans, such as factories, also have a large adjustment power when they change their production plans.

[0004] On the other hand, there have been existing technologies that combine power generation using a PV device with charging and discharging of a power storage device to utilize stable power while using unstable PV power generation output. For example, Patent Document 1 discloses such a technology.

[0005] Patent Document 1 describes a power storage control device that controls charging and discharging of a power storage device based on an estimated future amount of stored power based on a predicted output of renewable energy in the power storage device and the current state of charge. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 6954035 Summary of the Invention [Problem to be solved by the invention]

[0007] The demand response (DR) change in power consumption is requested by the power transmission and distribution company that manages supply and demand adjustment in the power grid. This request is issued based on the risk regarding the supply and demand balance of the entire power grid.

[0008] The energy storage control device in Patent Document 1 controls the charging and discharging of an energy storage device based on the estimated future energy storage amount based on the output prediction of an energy resource and the current charging state. However, it is impossible for each consumer to predict the request timing and the requested adjustment amount for a DR-based power consumption change request and control the charging and discharging based on the prediction results. Therefore, after receiving a DR request, it is necessary to satisfy the adjustment amount that can meet the DR request through charging and discharging. Therefore, it is necessary to prepare a storage capacity that is the product of the maximum possible DR request power and the DR request time, which results in significant costs for the energy storage equipment.

[0009] In addition, when a business called an aggregator receives a DR request and requests the power consumption changes included in the DR request from the consumer factory, it is necessary to control the storage of electricity taking into account the large fluctuations in power consumption based on the factory's production plan.

[0010] Therefore, the present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a technology that enables a consumer to appropriately respond to a DR request. [Means for solving the problem]

[0011] In order to achieve the above object, the present invention provides an electricity supply and demand adjustment system that adjusts the supply and demand of electricity for a consumer having an energy storage facility, the system comprising a computer having a memory and a processor, wherein the memory stores demand response event information including events related to the adjustment of the supply and demand of electricity, and the processor transmits to the consumer a request to change the operation schedule of the energy storage facility in accordance with the amount of adjustment of electricity consumption requested by the consumer based on the demand response event information and the consumer's electricity consumption schedule. [Effects of the Invention]

[0012] According to the present invention, it becomes possible for a consumer to appropriately respond to a DR request. Problems, configurations, and effects other than those described above will become apparent from the following description of the embodiment of the invention. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a diagram showing an example of the configuration of an electricity supply and demand adjustment system. [Figure 2] FIG. 1 is a diagram showing an example of a schematic configuration of a computer. [Figure 3] FIG. 10 is a diagram showing an example of DR event information. [Figure 4] FIG. 10 is a diagram showing an example of a production equipment operation schedule. [Figure 5] FIG. 10 is a diagram showing an example of production equipment power performance information. [Figure 6] FIG. 4 is a diagram showing an example of a power storage facility operation schedule. [Figure 7] FIG. 10 is a diagram showing an example of power storage facility operation schedule change information. [Figure 8] FIG. 10 is a diagram showing an example of a power storage facility operation schedule change screen (demand side). [Figure 9] 4 is a flowchart showing a power supply and demand adjustment process. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The following description and drawings are examples for explaining the present invention, and some omissions and simplifications have been made as appropriate for clarity of explanation. The present invention can be implemented in various other forms. Unless otherwise specified, each component may be singular or plural.

[0015] In order to facilitate understanding of the invention, the position, size, shape, range, etc. of each component shown in the drawings may not represent the actual position, size, shape, range, etc. Therefore, the present invention is not necessarily limited to the position, size, shape, range, etc. disclosed in the drawings.

[0016] In the following explanation, various types of information may be described using expressions such as "database," "table," and "list." However, various types of information may also be expressed using data structures other than these. To indicate that information is not dependent on the data structure, "XX table," "XX list," etc. may be referred to as "XX information." When describing identification information, expressions such as "identification information," "identifier," "name," "ID," and "number" are used, and these are interchangeable.

[0017] When there are multiple components with the same or similar functions, they may be described using the same reference numeral with different subscripts. However, when there is no need to distinguish between these multiple components, the subscripts may be omitted.

[0018] Furthermore, in the following description, processing performed by executing a program may be described. However, since a program is executed by a processor (e.g., a CPU or a GPU (Graphics Processing Unit)) to perform a predetermined process while appropriately using storage resources (e.g., memory) and / or interface devices (e.g., communication ports), the processor may be the subject of the processing. Similarly, the subject of the processing performed by executing a program may be a controller, device, system, computer, or node having a processor. The subject of the processing performed by executing a program may be any computing unit, and may include a dedicated circuit (e.g., an FPGA (Field-Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit)) that performs a specific process.

[0019] A program may be installed on a device such as a computer from a program source. The program source may be, for example, a program distribution server or a computer-readable storage medium. When the program source is a program distribution server, the program distribution server may include a processor and storage resources for storing the program to be distributed, and the processor of the program distribution server may distribute the program to be distributed to other computers. Furthermore, in the following description, two or more programs may be realized as one program, and one program may be realized as two or more programs.

[0020] An embodiment of a power supply and demand adjustment system and a power supply and demand adjustment method according to the present invention will be described below.

[0021] FIG. 1 is a diagram illustrating an example of the configuration of an electricity supply and demand adjustment system.

[0022] As shown in Fig. 1, an electric power supply and demand adjustment system 10 is communicably connected to an electric power consumer 20. Furthermore, the electric power supply and demand adjustment system 10 and the consumer 20 are communicably connected to a DR (Demand Response) request source 30 such as an electric power transmission and distribution business operator via a network 50. The network 50 is a general communication line, and may be wired or wireless.

[0023] The DR request source 30 requests a DR event from the consumer 20. The DR event may be requested by an aggregator that is in charge of aggregating and managing power adjustment capabilities.

[0024] The power supply and demand adjustment system 10 calculates the amount of adjustment of power consumption requested by the consumer 20 based on the new DR event received from the DR request source 30 and the power consumption schedule of the consumer 20. The power supply and demand adjustment system 10 transmits to the consumer 20 a request to change the power storage facility operation schedule 24, which is an example of the "operation schedule" of the power storage facility 22, according to the calculated amount of adjustment. Based on the DR event and the power consumption schedule, the power supply and demand adjustment system 10 requests the consumer 20 to change the power storage facility operation schedule to satisfy the DR event, and adjusts the supply and demand of power.

[0025] The consumer 20 may be a factory or the like having a production facility 22 that consumes electricity to operate. The consumer 20 includes a production facility 21, a power storage facility 22, and an operation schedule change reception I / F (interface) 26. The consumer 20 stores a production facility operation schedule 23 and a power storage facility operation schedule 24. The consumer 20 makes a DR response to the DR request received from the power supply and demand adjustment system 10.

[0026] The power supply and demand adjustment system 10 has a management terminal 15 operated by an administrator who manages the power supply and demand adjustment system 10, and a power reduction planning unit 11. The consumer 20 has a consumer management terminal 25 operated by an administrator who manages the consumer 20.

[0027] Specifically, as will be described later, the power supply and demand adjustment system 10 receives a message requesting a new DR event from a DR request source 30, and registers the DR event in list form in the DR event information 30. The power reduction planning unit 11 changes the operation schedule of the power storage equipment based on the DR event and the power consumption schedule of the consumer 20 so that the fluctuation in power consumption satisfies the requested adjustment amount.

[0028] In the following, an example will be given in which the power supply and demand adjustment system 10, the consumer 20, and the DR request source 30 are each configured by a single computer. However, all or part of these functions may be distributed among one or more computers, and the same functions may be realized by communicating with each other via a network. Specific explanations of the data and processing used in the power supply and demand adjustment system 10 will be given later.

[0029] FIG. 2 is a diagram illustrating an example of a schematic configuration of a computer.

[0030] The power supply and demand adjustment system 10, the consumer 20, and the DR request source 30 can be realized by, for example, a general server or computer 2001 as shown in FIG.

[0031] The computer 2001 includes a CPU 2002 as an example of a “processor”, a memory 2003 , an external storage device 2004 , an external media output device 2007 , an input device 2006 , an output device 2005 , and a network communication device 2008 .

[0032] The external storage device 2004 may be an HDD (Hard Disk Drive) or the like. The external medium output device 2007 reads and writes information from and to a portable storage medium such as a CD (Compact Disk) or a USB memory. The input device 2006 may be a keyboard or a mouse or the like. The output device 2005 may be a display or the like. The network communication device 2008 may be a network communication device 2008 such as an NIC (Network Interface Card) for connecting to a communication network. Similarly, the management terminal 15 and the customer management terminal 25 can also be realized by a general server or computer 2001.

[0033] Furthermore, various data stored in or used for processing in the power supply and demand adjustment system 10 can be read and used by the CPU 2002 from the memory 2003 or the external storage device 2004. Furthermore, each functional unit of the power supply and demand adjustment system 10 (for example, the power reduction planning unit 11 described below) can be realized by the CPU 2002 loading a predetermined program stored in the external storage device 2004 into the memory 2003 and executing it.

[0034] The above-mentioned predetermined program may be stored (downloaded) into the external storage device 2004 from a storage medium via the external medium output device 2007 or from a network via the network communication device 2008, and then loaded onto the memory 2003. Furthermore, the predetermined program may be directly loaded onto the memory 2003 from a storage medium via the external medium output device 2007 or from a network via the network communication device 2008.

[0035] Returning to Fig. 1, the power supply and demand adjustment system 10 further includes a DR request processing I / F 14 and an operation schedule change request I / F 16. The power supply and demand adjustment system 10 stores DR event information 30, production facility power performance information 12, and power storage facility charge / discharge performance information 13. First, the DR event information 30 will be described.

[0036] The DR event information 30 is information that indicates an event related to the adjustment of power supply and demand planned by the DR request source 30. The DR event information 30 is set by the DR request source 30 in advance.

[0037] FIG. 3 is a diagram illustrating an example of DR event information.

[0038] The DR event information 30 stores a DR event list 31 that represents the DR events set by the DR request source 13 in list format, and a DR event 32 that indicates the specific content of each DR event included in the DR event list 31, in association with each other.

[0039] For example, a "December 2023 supply and demand adjustment event" is stored as "DR event 1" in the DR event list 31. "December 1, 2023, 00:00:00" is stored as the "start date and time" of the DR event 32, and "December 7, 2023, 00:00:00" is stored as the "end date and time." For this one week period, an event to adjust power by "2000 kW" is stored as the "adjustment amount."

[0040] Next, a description will be given of the production facility operation schedule 40. The production facility operation schedule 40 is information that represents an operation schedule of the production facility 21 used for production in the customer 20 such as a factory.

[0041] FIG. 4 is a diagram illustrating an example of a production facility operation schedule.

[0042] The production equipment operation schedule 40 records a list 41 of equipment IDs corresponding to each piece of equipment in the factory, a list 42 of the times when the equipment will start operating, and a list 43 of the times when the equipment will stop operating, all of which are associated with each other.

[0043] As an example, the first line of the production equipment operation schedule 40 will be explained. The first line is for equipment ID 41 "001." This first line means that the start 42 is "October 1, 2023, 8:30 AM" and the end 43 is "October 1, 2023, 9:50 AM."

[0044] Next, a description will be given of the production facility power performance information 50. The production facility power performance information 50 is information that indicates how much power each of the above-mentioned production facilities consumes.

[0045] FIG. 5 is a diagram illustrating an example of production facility power performance information.

[0046] As shown in FIG. 5, production equipment power performance information 50 records a list 51 of equipment IDs corresponding to individual production equipment 21 in a factory and a list 52 of power consumption values ​​of the production equipment 21, each of which is associated with the other.

[0047] As an example, the first line of the production equipment power performance information 50 will be described. The first line is related to the equipment ID 51 of "001." This first line indicates that the power consumption 52 is "50 kW."

[0048] Next, a description will be given of the power storage facility operation schedule 60. The power storage facility operation schedule 60 is information representing an operation schedule of the power storage facility 22 used for storing power in the consumer facility 20 such as a factory.

[0049] FIG. 6 is a diagram showing an example of a power storage facility operation schedule.

[0050] The power storage equipment operation schedule 60 records a list 61 of operation modes indicating whether the operation of the factory power storage equipment 22 is charging or discharging, a list 62 of times when operation in that mode starts, and a list 63 of times when operation in that mode ends, all of which are associated with each other.

[0051] As an example, the first line of the power storage facility operation schedule 60 will be described. The first line relates to an operation mode 61 of "charging." This first line indicates that the start 62 is "October 1, 2023, 04:00" and the end 63 is "October 1, 2023, 08:30."

[0052] Next, a description will be given of the power storage facility operation schedule change information 70. The power storage facility operation schedule change information 70 is information that indicates how the operation schedule of the power storage facility 22 described above is to be changed.

[0053] FIG. 7 is a diagram illustrating an example of the power storage facility operation schedule change information.

[0054] The power storage equipment operation schedule change information 70 includes a change ID 71, a charge / discharge mode 72, a start time 73 for that mode, and an end time 74 for that mode, which indicate which parts of each charge / discharge schedule in the power storage equipment operation schedule 60 are to be changed. The power storage equipment operation schedule change information 70 describes in the next column how the mode 72, start time 73, and end time 74 are to be changed, and a change ID 71 is recorded for each combination of changes.

[0055] FIG. 8 is a diagram illustrating an example of an I / F for receiving changes to the operation schedule of a power storage facility.

[0056] The operation schedule change reception I / F 80 displays the power storage facility operation schedule change information 70, an OK button 81, a change button 82, a cancel button 83, and a communication field 84 on the screen. This operation schedule change reception I / F 80 is operated by the administrator of the consumer 20. The OK button 81 is pressed when the administrator of the consumer 20 confirms the changes to the charge / discharge schedule for each item of the change ID 71 and accepts the changes. The change button 82 is pressed by the administrator of the consumer 20 when further changes to the charge / discharge schedule are necessary, and editing is performed on the screen of the operation schedule change I / F 80. The cancel button 83 can be pressed by the administrator of the consumer 20 to cancel the editing results and return to the state before editing. The communication field 84 is where a message is entered by the administrator of the consumer 20, and the entered message can be sent to the administrator of the power supply and demand adjustment system 10.

[0057] Next, the power supply and demand adjustment process executed by the power reduction planning unit 11 of the power supply and demand adjustment system 10 will be described.

[0058] FIG. 9 is a flowchart showing the power supply and demand adjustment process.

[0059] In the power supply and demand adjustment process, first, the power reduction planning unit 11 receives a new DR event 32 from the DR request processing I / F 14 (S901).

[0060] Next, for each acquired DR event 32, the power reduction planning unit 11 calculates the power consumption of the production equipment during that time period for the start date / time, end date / time, and adjustment amount specified therein, from the production equipment operation schedule 40 and the production equipment power performance information 50 (S902).The power reduction planning unit 11 determines whether there is a contradiction (conflict) with the power reduction content included in the DR request (S903).

[0061] If the determination result of S903 is false (S903: NO), the power reduction planning unit 11 ends the power supply and demand adjustment process since there is nothing to be done. If the determination result of S903 is true (S903: YES), the power reduction planning unit 11 calculates a power consumption adjustment solution that satisfies the DR request by combining charging and discharging using the charging and discharging equipment (S904). The power reduction planning unit 11 determines whether there is a power consumption adjustment solution that satisfies the DR request (S905). If the determination result of S905 is true (S905: YES), the power reduction planning unit 11 changes the power storage equipment operation schedule for performing the charging and discharging, and updates the power storage equipment operation schedule change information 70 (S909). The power reduction planning unit 11 transmits a request to change the power storage equipment operation schedule to the consumer 20 via the operation schedule change request I / F 16 (S910).

[0062] If the determination result of S905 is false (S905: NO), the power reduction planning unit 11 extracts a pattern that can satisfy the DR request by combining changes and movements in the production process (S906). The power reduction planning unit 11 determines whether there is another pattern that can satisfy the DR request (S907). If the determination result of S907 is true (S907: YES), the power reduction planning unit 11 calculates a solution that combines charging and discharging (S904), changes the power storage equipment operation schedule (S909), and transmits a request to change the power storage equipment operation schedule to the consumer 20 via the operation schedule change request I / F 16 (S910). If no solution is found after repeating this process, the power reduction planning unit 11 determines that the DR request cannot be satisfied and ends the process (S908).

[0063] As described above, the power supply and demand adjustment system 10 adjusts the supply and demand of power for the consumer 20 that has the power storage facility 22. The power supply and demand adjustment system 10 includes a computer 2001 that includes a memory 2003 and a CPU 2002. The memory 2003 stores DR event information 3000 that includes events related to the adjustment of power supply and demand, and the CPU 2002 includes a power reduction planning unit 11 that transmits to the consumer 20 a request to change the power storage facility operation schedule 24 of the power storage facility 22 in accordance with the amount of power consumption adjustment required by the consumer 20, based on the DR event information 3000 and the power consumption schedule of the consumer 20.

[0064] This enables the adjustment of the power consumption included in the DR request, allowing the consumer 20 to respond appropriately to the DR request. Furthermore, it becomes possible to accurately and flexibly adjust the supply and demand of power according to the operation status of the various production facilities 21 and power storage facilities 22 owned by the consumer 20. In other words, by operating the power storage facilities 22 in anticipation of changes in power consumption due to the operation of the production facilities 21 of the consumer 20, it becomes possible to achieve the DR request with a power storage facility 22 of a smaller capacity. Therefore, it becomes possible to reduce the cost for the consumer 20 to respond to the DR request compared to the conventional method, and by reducing the economic risk for the consumer 20, it becomes possible to facilitate participation in DR. This makes it possible to incorporate a wider range of consumers 20 as resources to be integrated into the balancing power.

[0065] In recent years, as the trend toward increasing the proportion of electricity generated from renewable energy sources has accelerated worldwide, concerns about the stability of the power supply have led to the need to develop and secure consumers 20 that can generate adjustment power. This power supply and demand adjustment system 10 can meet the need for a highly stable source of adjustment power and contribute to the realization of carbon neutrality.

[0066] Furthermore, when the power reduction planning unit 11 receives demand response event information 30 from the aggregator, it transmits to the consumer 20 a request to change the power storage equipment operation schedule 24 of the power storage equipment 22 that satisfies the adjustment amount. This makes it possible to change the power storage equipment operation schedule 24 of a wider range of consumers 20 via the aggregator.

[0067] The consumer 20 is a factory that has production equipment that consumes power to operate, and the power reduction planning unit 11 calculates an adjustment solution for power consumption requested of the consumer 20 based on a preset operation schedule 23 of the production equipment and the power consumption of the production equipment. This makes it possible to respond to DR requests without affecting the productivity of the factory.

[0068] The demand response event information includes the amount of adjustment and the time period in which the amount of adjustment is required, allowing for detailed response to DR requests for each time period.

[0069] The present invention is not limited to the above-described embodiments as they are, and in the implementation stage, the components can be modified and embodied within the scope of the gist of the present invention, or multiple components disclosed in the above-described embodiments can be appropriately combined.

[0070] For example, if the amount of power consumption reduction cannot be met by changing the power storage facility operation schedule 24 of the power storage facility 22, the power reduction planning unit 11 may transmit a request to change the power consumption schedule to the consumer 20. This makes it possible to respond to the DR request by changing the power consumption schedule in addition to the power storage facility operation schedule 24.

[0071] For example, when the power reduction planning unit 11 receives a notification from a consumer 20 rejecting a request to change the power consumption schedule, the power reduction planning unit 11 may transmit a request to change the power consumption schedule to another consumer. This allows the power reduction planning unit 11 to flexibly respond to DR requests according to the situation of each consumer 20. [Explanation of symbols]

[0072] 10...power supply and demand adjustment system, 11...power reduction planning unit, 20...consumer, 22...power storage facility, 24...power storage facility operation schedule, 30...DR event information, 40...production facility operation schedule, 60...power storage facility operation schedule, 2001...computer, 2002...CPU, 2003...memory

Claims

1. An electric power supply and demand adjustment system that adjusts the supply and demand of electric power of a consumer having an electric power storage facility, a computer having a memory and a processor, The memory stores demand response event information including events related to the adjustment of power supply and demand, The processor is an electric power supply and demand adjustment system that includes a power reduction planning unit that transmits to the consumer a request to change the operation schedule of the power storage equipment in accordance with the amount of adjustment of power consumption requested by the consumer based on the demand response event information and the consumer's power consumption schedule.

2. The power reduction planning unit receives the demand response event information from the aggregator, and transmits to the consumer a request to change the operation schedule of the power storage equipment that satisfies the adjustment amount. The power supply and demand adjusting system according to claim 1 .

3. the power reduction planning unit transmits a request to change the power consumption schedule to the consumer when the change in the operation schedule of the power storage equipment does not satisfy the amount of reduction in power consumption; The power supply and demand adjustment system according to claim 2 .

4. the consumer is a factory having production equipment that consumes the power to operate, the power reduction planning unit calculates an adjustment solution for the power consumption required by the consumer based on a preset operation schedule of the production equipment and the power consumption of the production equipment; The power supply and demand adjusting system according to claim 2 .

5. The demand response event information includes the adjustment amount and a time period in which the adjustment amount is requested. The power supply and demand adjusting system according to claim 2 .

6. When the power reduction planning unit receives a notification from the consumer rejecting the request to change the power consumption schedule, the power reduction planning unit transmits a request to change the power consumption schedule to another consumer.

3. The power supply and demand adjustment system according to claim 2.

7. A power supply and demand adjustment method by a power supply and demand adjustment system that adjusts the supply and demand of power of a consumer having a power storage facility, comprising: a computer included in the power supply and demand adjustment system stores demand response event information including events related to the power supply and demand adjustment; The computer includes a power reduction planning unit that, when receiving the demand response event information from the aggregator, transmits to the consumer a request to change the operation schedule of the power storage equipment so as to satisfy the amount of adjustment of power consumption requested by the consumer, based on the demand response event information and the consumer's power consumption schedule.

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