Power operation management system, power operation management device, and power operation management method

Abstract

To provide a power operation management system for reducing power loss associated with charging / discharging.SOLUTION: A power operation management system 100 includes a power operation management device 70 that manages charging / discharging of a first charging / discharging system 30 and a second charging / discharging system 40. The first charging / discharging system 30 and the second charging / discharging system 40 are connected to a first power supply system 10 and a second power supply system 20 through a power network N1, and connected to a first power demand system 50 and a second power demand system 60. The plurality of charging / discharging systems having different charging / discharging efficiency are mixed. The plurality of power supply systems having different power generation method are mixed. The power operation management device 70 sets a charging / discharging plan of each charging / discharging system based on the charging / discharging efficiency and a priority of power efficiency associated with the power generation method.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a power operation management system and the like. [Background technology]

[0002] Known technologies for managing the operation of electricity include those described in Patent Documents 1 to 3. Patent Document 1 describes that "the first electricity origin determination unit reads supply amount information stored in the supply amount database... reads demand amount information... and determines the origin of the electricity supplied to each business establishment E."

[0003] Furthermore, Patent Document 2 describes that "assuming that the plurality of power supply resources are connected to each of the power demand resources by individual virtual power supply paths, an integrated value of the virtual amount of power per unit time is calculated for each of the virtual power supply paths."

[0004] Furthermore, Patent Document 3 describes that "tracking information is generated that indicates, among the charging rates of the storage device, the charging rate that is derived from renewable energy in the storage device and the charging rate that is derived from purchased electricity." [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2021-174336 [Patent Document 2] Japanese Patent Application Publication No. 2018-196257 [Patent Document 3] Japanese Patent Publication No. 2022-7988 Summary of the Invention [Problem to be solved by the invention]

[0006] Patent Documents 1 to 3 describe techniques for managing power operation based on the type of power source (origin of the power), but there is room for improvement in terms of reducing power loss associated with charging and discharging.

[0007] Therefore, an object of the present invention is to provide a power operation management system and the like that reduces power loss associated with charging and discharging. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, the present invention provides a power operation management system including a power operation management device that manages the charging and discharging of a plurality of charging and discharging systems, the plurality of charging and discharging systems being connected to a plurality of power supply systems via a power network and being connected to at least one power demand system, and the plurality of charging and discharging systems being connected to at least one power demand system, and a first charge / discharge system and a second charge / discharge system having a lower charge / discharge efficiency than the first charge / discharge system, The plurality of power supply systems may have different power generation methods. a first power supply system and a second power supply system that uses a power generation method different from that of the first power supply system, The power operation management device sets charge and discharge plans for the plurality of charge and discharge systems based on the charge and discharge efficiency and the priority order of power efficiency associated with the power generation method. When a power generation method of the first power supply system has a higher priority than a power generation method of the second power supply system, and when a time period for charging with power from the first power supply system and a time period for charging with power from the second power supply system at least partially overlap, the power operations management device allocates the power from the first power supply system to charging the first charging / discharging system and allocates the power from the second power supply system to charging the second charging / discharging system during at least the part of the time period. It was decided that. Other details will be explained in the embodiments. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a power operation management system and the like that reduces power loss associated with charging and discharging. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a functional block diagram of a power operation management system according to a first embodiment. [Figure 2] 1 is a block diagram showing a hardware configuration of a power operations management device included in a power operations management system according to a first embodiment. [Figure 3] FIG. 2 is an explanatory diagram relating to a power supply plan of the power operations management system according to the first embodiment. [Figure 4]FIG. 2 is an explanatory diagram relating to a power demand plan of the power operations management system according to the first embodiment. [Figure 5] FIG. 2 is an explanatory diagram relating to a charge and discharge plan of the power operation management system according to the first embodiment. [Figure 6] 3 is an explanatory diagram relating to the transition of the amount of stored electricity in each of the first charge / discharge system and the second charge / discharge system in the power operation management system according to the first embodiment. FIG. [Figure 7] 2 is an explanatory diagram of data stored in a power operations management device of the power operations management system according to the first embodiment. FIG. [Figure 8A] FIG. 3 is a sequence diagram relating to a preparation stage for charging and discharging in the power operation management system according to the first embodiment. [Figure 8B] FIG. 3 is a sequence diagram relating to the execution of charging and discharging in the power operation management system according to the first embodiment. [Figure 8C] FIG. 3 is a sequence diagram relating to correction of charge / discharge amounts in the power operation management system according to the first embodiment. [Figure 9] 4 is a flowchart relating to processing by a power operations management device of the power operations management system according to the first embodiment. [Figure 10] FIG. 10 is an explanatory diagram relating to a charge and discharge plan of the power operations management system according to the second embodiment. [Figure 11] FIG. 10 is an explanatory diagram showing the transition of the amount of stored electricity in each of the charge / discharge devices in the power operation management system according to the second embodiment. [Figure 12] FIG. 10 is a sequence diagram relating to the execution of charging and discharging in the power operation management system according to the second embodiment. [Figure 13] 10 is a flowchart relating to processing by a power operations management device of a power operations management system according to a second embodiment. [Figure 14] FIG. 10 is a functional block diagram of a power operation management system according to a third embodiment. [Figure 15] 11 is a flowchart relating to processing by a power operations management device of a power operations management system according to a third embodiment. [Figure 16]FIG. 11 is an explanatory diagram relating to the amounts of stored electricity in a first charge / discharge system and a second charge / discharge system in a power operation management system according to a third embodiment. [Figure 17] FIG. 11 is an explanatory diagram relating to power operation management over multiple days in a power operation management system according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] First Embodiment <Configuration of the power operation management system> FIG. 1 is a functional block diagram of a power operation management system 100 according to the first embodiment. In addition, the thick solid lines shown in FIG. 1 indicate power lines, and the dashed lines indicate communication lines. The power operations management system 100 is a system that manages the supply and charging / discharging of power. As shown in Fig. 1, the power operations management system 100 includes a first power supply system 10, a second power supply system 20, a first charging / discharging system 30, a second charging / discharging system 40, a first power demand system 50, a second power demand system 60, a power operations management device 70, and a distributed ledger system 80.

[0012] 1, a first power supply system 10, a second power supply system 20, a first charge / discharge system 30, a second charge / discharge system 40, a first power demand system 50, and a second power demand system 60 are connected via a power network N1. Furthermore, each system connected via the power network N1 is connected to a power operations management device 70 via a communication line (dashed line in FIG. 1).

[0013] The first power supply system 10 and the second power supply system 20 are systems that supply power in a predetermined manner via a power network N1. The first power supply system 10 and the second power supply system 20 differ in their power generation methods. In the first embodiment, as an example, a case will be described in which the "first power" supplied from the first power supply system 10 is power generated by renewable energy, and the "second power" supplied from the second power supply system 20 is power generated by non-renewable energy.

[0014] Examples of power generation methods using renewable energy include solar power generation, wind power generation, hydroelectric power generation, geothermal power generation, biomass power generation, and thermal power generation. Furthermore, examples of power generation methods using non-renewable energy include thermal power generation and nuclear power generation. Details will be described later, but when improving power efficiency in charging and discharging, etc., the "first power" has a higher priority than the "second power." In other words, the power generation method of the first power supply system 10 has a higher priority than the power generation method of the second power supply system 20 when improving power efficiency.

[0015] The first power supply system 10 is a system that supplies the above-mentioned "first power" and includes a power supply device 11, a measuring device 12, and a power supply control computer 13. The power supply device 11 is, for example, a power generation facility that generates power using a predetermined renewable energy. The "first power" generated by the power supply device 11 is supplied via a power network N1. The measuring device 12 measures the amount of power generated by the power supply device 11 at predetermined time intervals. The measured value of the measuring device 12 is output to the power supply control computer 13. The power supply control computer 13 creates a predetermined power supply plan and controls the power supply device 11 based on this power supply plan. The power supply plan data is transmitted from the power supply control computer 13 to the power operations management device 70 via a communication line.

[0016] The second power supply system 20 is a system that supplies the above-mentioned "second power" and includes a power supply device 21, a measuring device 22, and a power supply control computer 23. The power supply device 21 is, for example, a power generation facility that generates power using a predetermined non-renewable energy. The "second power" generated by the power supply device 21 is supplied in a predetermined manner via a power network N1. The measuring device 22 and the power supply control computer 23 of the second power supply system 20 are similar to those of the first power supply system 10, and therefore will not be described here.

[0017] The first charging / discharging system 30 is a system that charges with power supplied from the first power supply system 10 and the second power supply system 20 and discharges the power to the first power demand system 50 and the second power demand system 60. The same applies to the second charging / discharging system 40. As shown in FIG. 1 , the first charging / discharging system 30 and the second charging / discharging system 40 are connected to the first power supply system 10 and the second power supply system 20, respectively, and are also connected to the first power demand system 50 and the second power demand system 60 via a power network N1.

[0018] For example, solar power generation generates a lot of power during the day but almost no power at night, and the power generation varies greatly depending on the time of day. Furthermore, the time periods when the power generation peaks and the power demand peak are often different. Therefore, a predetermined amount of generated power is first charged into the first charging / discharging system 30 and the second charging / discharging system 40, and then discharged from the first charging / discharging system 30 and the second charging / discharging system 40 to the demand side. Note that power may also be supplied directly from the first power supply system 10 and the second power supply system 20 to the first power demand system 50 and the second power demand system 60 via the power network N1.

[0019] As shown in FIG. 1, the first charge / discharge system 30 includes a charge / discharge device 31, a measuring device 32, and a charge / discharge control computer 33. The charge / discharge device 31 is a chargeable / dischargeable secondary battery such as a battery. The charge / discharge device 31 may also be configured with a plurality of secondary batteries connected in a predetermined manner. In the example of the first embodiment, the initial value of the charge / discharge efficiency (also referred to as charge / discharge efficiency) of the charge / discharge device 31 is set to 90%. The charge / discharge efficiency often differs depending on the type of battery, and the charge / discharge efficiency often gradually decreases as the number of times the battery is charged / discharged increases. Incidentally, losses associated with charging / discharging are due to the dissipation of thermal energy during charging / discharging, etc.

[0020] 1 measures the amount of power charged to the charging / discharging device 31 per predetermined time and the amount of power discharged from the charging / discharging device 31 per predetermined time. The measured values ​​of the measuring device 32 are output to the charging / discharging control computer 33. The charging / discharging control computer 33 charges and discharges the charging / discharging device 31 in a predetermined manner based on a charging / discharging plan created by the power operations management device 70. Data such as the amount of power charged and discharged is transmitted from the charging / discharging control computer 33 to the power operations management device 70 via a communication line.

[0021] The second charging / discharging system 40 is a system that charges or discharges power, and includes a charging / discharging device 41, a measuring device 42, and a charging / discharging control computer 43. The charging / discharging device 41 is a rechargeable secondary battery such as a battery. In the example of the first embodiment, the initial value of the charging / discharging efficiency of the charging / discharging device 41 is set to 80%. In this way, the charging / discharging efficiency of the second charging / discharging system 40 (e.g., 80%) is lower than the charging / discharging efficiency of the first charging / discharging system 30 (e.g., 90%). Then, charging / discharging plans for the first charging / discharging system 30 and the second charging / discharging system 40 are created based on the charging / discharging efficiency.

[0022] The measuring device 42 and the charge / discharge control computer 43 of the second charge / discharge system 40 shown in FIG. 1 are similar to those of the first charge / discharge system 30, and therefore a description thereof will be omitted.

[0023] The first power demand system 50 is a system on the power demand side and includes a power demand device 51, a measuring device 52, and a power demand control computer 53. The power demand device 51 is a device that consumes power. Examples of such devices include, but are not limited to, home appliances such as air conditioners, washing machines, and vacuum cleaners, electronic devices such as computers, and machine tools used in factories. The measuring device 52 measures the amount of power consumed by the power demand device 51 at predetermined time intervals. The measured values ​​of the measuring device 52 are output to the power demand control computer 53. The power demand control computer 53 creates a predetermined power demand plan and controls the power demand device 51 based on this power demand plan. The power demand plan data is transmitted from the power demand control computer 53 to the power operations management device 70 via a communication line.

[0024] The second power demand system 60 is a system on the power demand side, and includes a power demand device 61, a measuring device 62, and a power demand control computer 63. The configuration of the second power demand system 60 is similar to that of the first power demand system 50, and therefore a description thereof will be omitted.

[0025] The power operation management device 70 manages the charging and discharging of the first charging and discharging system 30 and the second charging and discharging system 40 based on a power supply plan and a power demand plan. The power operation management device 70 also manages data on the charging amount, discharging amount, and storage amount of the first charging and discharging system 30 and the second charging and discharging system 40 for each type of power (the above-mentioned "first power" and "second power"). The distributed ledger system 80 is a system that records data received from the power operations management device 70, and is connected to the power operations management device 70 via a communication line.

[0026] FIG. 2 is a block diagram showing the hardware configuration of the power operation management device. 2 may be a single computer (such as a server), or may be multiple computers working together to perform various functions. As shown in Fig. 2, power operations management device 70 includes processor 71, communication interface 72, main memory device 73, auxiliary memory device 74, input / output interface 75, and bus 76 connecting these components.

[0027] The processor 71 loads a program 74a stored in the auxiliary storage device 74 into the main storage device 73 and executes predetermined processing. For example, a CPU (Central Processing Unit), a DSP (Digital Signal Processor), or an ASIC (Application Specific Integrated Circuit) is used as the processor 71. The communication interface 72 is an interface used for communication between the power operation management device 70 and each of the other systems.

[0028] Predetermined programs and data are stored in the main storage device 73. For example, a flash memory or a RAM (Random Access Memory) is used as the main storage device 73. Predetermined programs 74a and data 74b are stored in the auxiliary storage device 74 shown in FIG. 2. For example, a nonvolatile semiconductor memory (flash memory, EPROM (Erasable Programmable ROM)), a solid state drive device, or a hard disk device (HDD: Hard Disk Drive) is used as the auxiliary storage device 74. The program 74a may be downloaded from a predetermined server (not shown) or read from a predetermined storage medium (not shown).

[0029] The input / output interface 75 outputs a predetermined signal based on a user's operation via an input device (not shown). Examples of such input devices (not shown) include a keyboard, a touch panel, a mouse, and a microphone. The input / output interface 75 also outputs data processed by the processor 71, as well as data stored in the main storage device 73 and the auxiliary storage device 74, to an output device (not shown). Examples of such output devices (not shown) include display devices such as an LCD (Liquid Crystal Display) or an EL (Electroluminescence) panel, as well as a printer and a speaker.

[0030] FIG. 3 is an explanatory diagram regarding the power supply plan (see also FIG. 1 as appropriate). As described above, the power supply plan is created in the first power supply system 10 or the second power supply system 20, and then notified to the power operations management device 70. As shown in FIG. 3, the fields (items) of the power supply plan include a "management ID," a "date," a "time slot," a "supply side ID," a "power type," a "power source type," and an "amount of power." The "management ID" is identification information for each power supply plan. The "date" is the date on which power is supplied. The "time slot" is the time period during which power is supplied. The "supply side ID" is identification information for the power supply source. Note that the "10" in the "supply side ID" in FIG. 3 indicates that the power supply source is the first power supply system 10. In other words, the "10" that is the code for the first power supply system 10 is used as the "supply side ID."

[0031] 3 is data indicating the type of electricity. In the first embodiment, a case will be described in which the "electricity type" is either "first electricity" (electricity type T1) from renewable energy or "second electricity" (electricity type T2) from non-renewable energy, but the present invention is not limited to this. The "power source type" shown in Figure 3 is data indicating the type of electricity (power source) and is a subdivision of the "power source type." Such a "power source type" is associated with, for example, solar power generation, wind power generation, hydroelectric power generation, etc.

[0032] The "power amount" shown in FIG. 3 is the amount of power supplied from the power supply source identified by the "supply side ID" during a predetermined time period. In the example of FIG. 3, the power supply plan for "management ID" S1 is a plan for the first power supply system 10 to supply 600 kWh of power of power type T1 and power source type P1 during the time period from 10:00 to 10:29 on August 1, 2022. Note that the method for creating the power supply plan is not particularly limited, and any known method may be used as appropriate.

[0033] FIG. 4 is an explanatory diagram relating to the power demand plan (also refer to FIG. 1 as appropriate). As described above, the power demand plan is created in the first power demand system 50 or the second power demand system 60, and then notified to the power operations management device 70. The fields (items) of the power demand plan shown in FIG. 4 include a "management ID," a "date," a "time slot," a "demand side ID," a "power type," a "power source type," and an "amount of power." The "demand side ID" is identification information for the power demand side. For example, "50" in the "demand side ID" shown in FIG. 4 indicates that the power demand side is the first power demand system 50. Note that the other fields (items) of the power demand plan are the same as those described in the power supply plan (see FIG. 3), and therefore description thereof will be omitted. Furthermore, the method for creating the power demand plan is not particularly limited, and well-known methods may be used as appropriate.

[0034] FIG. 5 is an explanatory diagram regarding the charge and discharge plan (also refer to FIG. 1 as appropriate). The charge / discharge plan shown in Fig. 5 is created by the power operations management device 70 based on the power supply plan (see Fig. 3) and the power demand plan (see Fig. 4) described above. The fields (items) of the charge / discharge plan shown in Fig. 5 include "management ID," "date," "time slot," "control type," "supply side ID," "demand side ID," "power type," "power source type," and "power amount." "Control type," which is one of the fields (items) of such a charge / discharge plan, indicates whether it is charging or discharging.

[0035] For example, when the "control type" is "charging," the identification information of the first power supply system 10 or the second power supply system 20, which is the power supply source, is used as the "supply side ID," and the identification information of the first charge / discharge system 30 or the second charge / discharge system 40, which is the power receiving side, is used as the "demand side ID." In the charge / discharge plan with the management ID "C1" in FIG. 5, a plan is made to charge 500 kWh of "first power," which is power type T1 and power source type P1, from the first power supply system 10 to the first charge / discharge system 30 during the time period from 10:00 to 10:29 on August 1, 2022.

[0036] Furthermore, when the "control type" is "discharge," the identification information of the first charging / discharging system 30 or the second charging / discharging system 40, which is the power supply source, is used as the "supply side ID," and the identification information of the first power demand system 50 or the second power demand system 60, which is the power demand side, is used as the "demand side ID." In the charging / discharging plan with the management ID "C4" in FIG. 5, a plan is made to discharge 100 kWh of "second power," which is power type T2 and power source type P2, from the first charging / discharging system 30 to the second power demand system 60 during the time period from 11:00 to 11:29 on August 1, 2022.

[0037] FIG. 6 is an explanatory diagram relating to the transition of the amount of stored electricity in each of the first charge / discharge system and the second charge / discharge system (also refer to FIG. 1 as appropriate). The transition of the amount of stored electricity shown in FIG. 6 corresponds to the power supply plan (see FIG. 3), the power demand plan (see FIG. 4), and the charge / discharge plan (see FIG. 5). In FIG. 6, the amount of stored electricity from the "first electricity" (e.g., electricity generated by renewable energy) in the first charge / discharge system 30 and the second charge / discharge system 40 is indicated by dots, and the amount of stored electricity from the "second electricity" (e.g., electricity generated by non-renewable energy) is indicated by hatching. The charging capacity of each of the first charge / discharge system 30 and the second charge / discharge system 40 is assumed to be 1000 kWh. Furthermore, as of 10:00, the first charge / discharge system 30 is assumed to have stored 500 kWh of "second electricity" as an amount of electricity.

[0038] In the power supply plan shown in FIG. 3, 600 kWh of "first power" (power type T1) is supplied from the first power supply system 10 during the time period from 10:00 to 10:29 on August 1, 2022. When this 600 kWh of "first power" is initially charged, the power operations management device 70 creates a charge / discharge plan so that charging is performed in descending order of charge / discharge efficiency. In the charge / discharge plan shown in FIG. 5, of the 600 kWh of power, 500 kWh is charged to the first charge / discharge system 30, which has high charge / discharge efficiency (management ID: C1). In addition, the remaining 100 kWh of power that cannot be fully charged by the first charge / discharge system 30 is charged to the second charge / discharge system 40, which has low charge / discharge efficiency (management ID: C2). As a result, the state shown at "10:30" in FIG. 6 is achieved.

[0039] In this way, when charging a predetermined amount of power from the first power supply system 10, the power operation management device 70 charges the available space in the first charge / discharge system 30, and charges the amount that is not enough in this available space in the second charge / discharge system 40. This allows charging to be performed preferentially in the first charge / discharge system 30, which has high charging and discharging efficiency, thereby reducing power loss associated with charging.

[0040] In the power demand plan shown in FIG. 4, during the time period from 11:00 to 11:29 on August 1, 2022, there is a demand for 100 [kWh] of "first power" in the first power demand system 50, and there is a demand for 100 [kWh] of "second power" in the second power demand system 60. In the charge / discharge plan shown in FIG. 5, 100 [kWh] is supplied to the first power demand system 50 as "first power" and 100 [kWh] is supplied to the second power demand system 60 as "second power". As a result, the state at "11:30" in FIG. 6 is reached.

[0041] In this way, the power operations management device 70 uses a priority based on the power generation method to determine the order in which to charge the first charging / discharging system 30, which has high charging / discharging efficiency, with which type of power. That is, the power operations management device 70 sets a charge / discharge plan for the first charging / discharging system 30 and the second charging / discharging system 40 based on the charging / discharging efficiency (charge / discharge efficiency) and the power efficiency priority associated with the power generation method. The power operations management device 70 then prioritizes charging or discharging between the first charging / discharging system 30 and the second charging / discharging system 40, starting with the system with the highest charging / discharging efficiency (charge / discharge efficiency). This reduces loss of the "first power," which has high priority when improving power efficiency, and allows power operations to be managed so that the "first power" is used with high efficiency.

[0042] As another example different from FIG. 6 , although not shown, it is assumed that a power supply plan is established so that "first power" is supplied from the first power supply system 10 and "second power" is supplied from the second power supply system 20 during the time period of 10:00 to 10:29. In such a case, the power operations management device 70 establishes a charge / discharge plan so that the "first power" is charged to the first charge / discharge system 30 and the "second power" is charged to the second charge / discharge system 40. In other words, when the supplies of "first power" and "second power" overlap in time, the power operations management device 70 preferentially allocates the "first power" to the first charge / discharge system 30, which has high charging and discharging efficiency. This reduces power loss associated with charging and discharging of the "first power," allowing the "first power," which has a high priority, to be operated with high efficiency.

[0043] In this way, when the time period for charging with power from the first power supply system 10 and the time period for charging with power from the second power supply system 20 overlap at least partially, the power operations management device 70 allocates the power from the first power supply system 10 to charging the first charging / discharging system 30 and allocates the power from the second power supply system 20 to charging the second charging / discharging system 40 during at least that part of the time period. Alternatively, if there is still available capacity even after allocating the power from the first power supply system 10 to charging the first charging / discharging system 30, the power from the second power supply system 20 is allocated to charging the available capacity of the first charging / discharging system 30 and to charging the second charging / discharging system 40. This makes it possible to reduce power loss associated with charging and discharging of the "first power," as described above.

[0044] FIG. 7 is an explanatory diagram of data stored in the power operation management device (also see FIG. 1 as appropriate). As shown in FIG. 7, the auxiliary storage device 74 of the power operation management device 70 (see FIG. 2) stores power supply plan data 7a, power demand plan data 7b, charge / discharge plan data 7c, power charge data 7d, power discharge data 7e, provisional power storage amount data 7f, physical power storage amount data 7g, and logical power storage amount data 7h.

[0045] The power supply plan data 7a is data on a power supply plan, and is transmitted from the first power supply system 10 and the second power supply system 20 to the power operations management device 70. The power demand plan data 7b is data on a power demand plan, and is transmitted from the first power demand system 50 and the second power demand system 60 to the power operations management device 70. The charge / discharge plan data 7c is data on a charge / discharge plan, and is created by the power operations management device 70.

[0046] The power charging data 7d is data for managing the amount of charge in the first charging / discharging system 30 and the second charging / discharging system 40 for each type of power. The power discharging data 7e is data for managing the amount of discharge in the first charging / discharging system 30 and the second charging / discharging system 40 for each type of power. The provisional stored power amount data 7f is data for managing the provisional stored power amount calculated based on the charged and discharged power amounts for each type of power. Note that the "provisional stored power amount" is the amount of stored power in the first charging / discharging system 30 and the second charging / discharging system 40 without taking into consideration power loss associated with charging and discharging.

[0047] The physical stored energy amount data 7g is the amount of energy stored in the first charge / discharge system 30 and the second charge / discharge system 40 based on the measurement results of the measuring devices 32 and 42. The logical stored energy amount data 7h is the amount of energy stored in the provisional stored energy amount data 7f when power loss due to charging and discharging is corrected based on the physical stored energy amount data 7g, and is managed for each type of power.

[0048] FIG. 8A is a sequence diagram relating to the preparation stage for charging and discharging in the power operation management system (see also FIG. 1 as appropriate). In step S101 of FIG. 8A, the power operations management device 70 performs initial configuration. That is, the power operations management device 70 sets initial values ​​for the charge and discharge efficiencies of the first charging / discharging system 30 and the second charging / discharging system 40, etc., based on input operations by the administrator. Then, the power operations management device 70 receives an initial value of the charge amount from the first charging / discharging system 30 (S102) and records it in the distributed ledger system 80 (S103). For example, the power operations management device 70 records that 500 kWh of "second power" has been stored in the first charging / discharging system 30 (see FIG. 6). Similarly, the power operations management device 70 receives an initial value of the charge amount from the second charging / discharging system 40 (S104) and records it in the distributed ledger system 80 (S105). For example, the power operations management device 70 records that the initial value of the stored power amount of the second charging / discharging system 40 is 0 kWh (see FIG. 6).

[0049] Next, the power operations management device 70 receives the power supply plan from the first power supply system 10 (S106) and records it in the distributed ledger system 80 (S107). For example, the power operations management device 70 records the data indicated by management ID: S1 in Figure 3. Figure 7A shows an example where there is no particular power supply plan for the second power supply system 20, but if there is a power supply plan for the second power supply system 20, this power supply plan is also recorded.

[0050] Next, the power operations management device 70 receives the power demand plan from the first power demand system 50 (S108) and records it in the distributed ledger system 80 (S109). For example, the power operations management device 70 records the data indicated by management ID: D1 in FIG. 4. Similarly, the power operations management device 70 receives the power demand plan from the second power demand system 60 (S110) and records it in the distributed ledger system 80 (S111). For example, the power operations management device 70 records the data indicated by management ID: D2 in FIG. 4.

[0051] Then, the power operations management device 70 creates a charge / discharge plan based on the received power supply plan and power demand plan (step S112) and records it in the distributed ledger system 80 (S113). For example, the power operations management device 70 creates charge / discharge plans for management IDs C1 to C4 in Figure 5.

[0052] In step S114, the power operations management device 70 performs charge and discharge settings for the first charge and discharge system 30. For example, the power operations management device 70 performs charge and discharge settings based on the charge and discharge plans for management IDs C1, C3, and C4 in FIG. 5. In step S115, the power operations management device 70 performs charge and discharge settings for the second charge and discharge system 40. For example, the power operations management device 70 performs charge and discharge settings based on the charge and discharge plan for management ID C2 in FIG. 5.

[0053] Next, in step S116, the power operation management device 70 determines whether it is time to measure the amount of stored power (physical amount of stored power) in the first charge / discharge system 30 or the second charge / discharge system 40. If it is time to measure the amount of stored power, the power operation management device 70 requests the first charge / discharge system 30 or the second charge / discharge system 40 to notify them of the amount of stored power.

[0054] In step S117, the power operations management device 70 determines whether or not it has received charge / discharge data (amount of charged or discharged power) from the first charge / discharge system 30 or the second charge / discharge system 40. If it has received charge / discharge data from the first charge / discharge system 30 or the second charge / discharge system 40, the power operations management device 70 records this charge / discharge data in the distributed ledger system 80.

[0055] FIG. 8B is a sequence diagram relating to the execution of charging and discharging in the power operation management system (see also FIG. 1 as appropriate). It is assumed that at least the charge / discharge setting process (S114, S115: see FIG. 8A) has already been performed when the series of processes in FIG. 8B is started. In step S121 of FIG. 8B, when a predetermined time based on the power supply plan arrives, the first power supply system 10 supplies "first power" which is generated power to the first charge / discharge system 30 (described as "first power generation supply" in FIG. 8B). In the example of FIG. 5, control corresponding to management ID: C1 is performed. In step S122, the first power supply system 10 supplies the first power which is generated power to the second charge / discharge system 40. In the example of FIG. 5, control corresponding to management ID: C2 is performed.

[0056] In step S123, the first charging / discharging system 30 notifies the power operations management device 70 of the measured value of the charged amount. In the example of management ID: C1 in FIG. 5 , a value of 500 [kWh] is notified to the power operations management device 70 as the charged amount of the first charging / discharging system 30. In step S124, the power operations management device 70 records the charged amount data received from the first charging / discharging system 30 in the distributed ledger system 80.

[0057] In step S125, the second charging / discharging system 40 notifies the power operations management device 70 of the measured value of the charged amount. In the example of management ID: C2 in FIG. 5 , a value of 100 [kWh] is notified to the power operations management device 70 as the charged amount of the second charging / discharging system 40. In step S126, the power operations management device 70 records the charged amount data received from the second charging / discharging system 40 in the distributed ledger system 80.

[0058] In step S127, when a predetermined time based on the charge / discharge plan arrives, first charge / discharge system 30 discharges a predetermined amount of power to first power demand system 50. In the example of Fig. 5, control corresponding to management ID: C3 is performed. In step S128, when a predetermined time based on the charge / discharge plan arrives, first charge / discharge system 30 discharges a predetermined amount of power to second power demand system 60. In the example of Fig. 5, control corresponding to management ID: C4 is performed. Note that in the example of Fig. 5, no particular settings are made regarding the charge / discharge of second charge / discharge system 40, and therefore this is also omitted in Fig. 8B.

[0059] In step S129, the first charging / discharging system 30 notifies the power operations management device 70 about the discharge of the "first power." In the example of management ID: C3 in FIG. 5, a value of 100 [kWh] is notified to the power operations management device 70 as the "first power" discharged from the first charging / discharging system 30. In step S130, the power operations management device 70 records the discharge amount of the "first power" received from the first charging / discharging system 30 in the distributed ledger system 80.

[0060] In step S131, the first charging / discharging system 30 notifies the power operations management device 70 about the discharge of the "second power." In the example of management ID: C4 in FIG. 5, a value of 100 [kWh] is notified to the power operations management device 70 as the "second power" discharged from the first charging / discharging system 30. In step S132, the power operations management device 70 records the discharge amount of the "second power" received from the first charging / discharging system 30 in the distributed ledger system 80.

[0061] FIG. 8C is a sequence diagram relating to correction of the charge / discharge amount in the power operation management system (see also FIG. 1 as appropriate). 8C may be started after the series of processes in Fig. 8B is completed, or may be started at another timing. In step S141, power operation management device 70 determines whether it is time to measure the amount of stored power (physical amount of stored power) in first charging / discharging system 30 or second charging / discharging system 40. The frequency of measuring the amount of stored power is set in advance, such as once a day or once a week.

[0062] When the time to measure the amount of stored electricity arrives, the power operations management device 70 acquires data on the amount of stored electricity from the first charging / discharging system 30 (S142) and records this data in the distributed ledger system 80 (S143). For example, the power operations management device 70 acquires a value of 730 [kWh] as the amount of stored electricity in the first charging / discharging system 30 and records this value in the distributed ledger system 80. Similarly, the power operations management device 70 acquires data on the amount of stored electricity from the second charging / discharging system 40 (S144) and records this data in the distributed ledger system 80 (S145). For example, the power operations management device 70 acquires a value of 80 [kWh] as the amount of stored electricity in the second charging / discharging system 40 and records this value in the distributed ledger system 80.

[0063] In step S146, the power operations management device 70 tally up the charge amounts. For example, the power operations management device 70 tally up the charge amounts for each charge / discharge system and for each type of power, such as when 500 [kWh] of "first power" is charged to the first charge / discharge system 30 and 100 [kWh] is charged to the second charge / discharge system 40 (see management IDs C1 and C2 in FIG. 5).

[0064] In step S147, the power operations management device 70 tally up the discharge amounts. For example, the power operations management device 70 tally up the discharge amounts for each charge / discharge system and for each type of power, such as 100 [kWh] of "first power" being discharged from the first charge / discharge system 30 and 100 [kWh] of "second power" being discharged (see management IDs C3 and C4 in FIG. 5).

[0065] In step S148, the power operations management device 70 corrects the amount of stored power. That is, the power operations management device 70 corrects the amount of stored power for each type of power based on the initial value of the amount of stored power (physical amount of stored power) for each type of power, the aggregated amount of charged and discharged power, the provisional amount of stored power, and the amount of stored power acquired at the time of measuring the amount of stored power.

[0066] For example, assume that the initial value of the amount of stored electricity (physical amount of stored electricity) in the first charging / discharging system 30 is 500 [kWh], and the type of electricity is "second electricity." In the example of FIG. 5, after 500 [kWh] of "first electricity" is charged to the first charging / discharging system 30, 100 [kWh] of "first electricity" is discharged from the first charging / discharging system 30, and 100 [kWh] of "second electricity" is also discharged (see also FIG. 6). Therefore, the provisional amount of stored electricity in the first charging / discharging system 30 is 800 [kWh]. As described above, the provisional amount of stored electricity is the amount of stored electricity when losses associated with charging and discharging are not particularly taken into consideration.

[0067] Meanwhile, suppose that the measurement of the stored power amount in step S142 reveals that the stored power amount (physical stored power amount) of the first charging / discharging system 30 is 730 kWh. In this case, a power loss of 70 kWh occurs due to charging / discharging of the first charging / discharging system 30, but the power loss for each type of power is not specified. Therefore, in the first embodiment, the power operations management device 70 calculates the power loss for each type of power based on the ratio of the charging / discharging amount to the total amount of charging / discharging performed in a predetermined period.

[0068] In the example of FIG. 5, for the "first power" of power type T1, the sum of the charge amount (500 [kWh]) and the discharge amount (100 [kWh]) is 600 [kWh]. Also, for the "second power" of power type T2, the sum of the charge amount (0 [kWh]) and the discharge amount (100 [kWh]) is 100 [kWh]. Therefore, the total amount of charge and discharge is 700 [kWh]. For the "first power," because the charge and discharge amount is 600 [kWh] out of the total amount of charge and discharge of 700 [kWh], the power operations management device 70 calculates the power loss as 60 [kWh] based on the calculation formula 70 × (600 / 700).

[0069] Furthermore, since the "second power" is charged and discharged at 100 [kWh] out of a total charge and discharge amount of 700 [kWh], power operations management device 70 calculates the power loss as 10 [kWh] based on the calculation formula of 70 × (100 / 700). Then, power operations management device 70 calculates the amount of stored power (logical stored power amount) of "first power" in first charge / discharge system 30 as 340 [kWh] (= 400 [kWh] - 60 [kWh]) and the amount of stored power of "second power" as 390 [kWh] (= 400 [kWh] - 10 [kWh]), and generates logical stored power amount data 7h (see FIG. 7).

[0070] 5, the initial value of the amount of stored power in the second charging / discharging system 40 is 0 [kWh], and then 100 [kWh] of "first power" is charged to the second charging / discharging system 40. Therefore, the provisional amount of stored power in the second charging / discharging system 40 is 100 [kWh]. Meanwhile, in the measurement of the amount of stored power in step S145, the amount of stored power (physical amount of stored power) in the second charging / discharging system 40 is assumed to be 80 [kWh]. In this case, a power loss of 20 [kWh] occurs due to the charging of the second charging / discharging system 40. Therefore, the power operations management device 70 sets the amount of stored power (logical amount of stored power) of "first power" in the second charging / discharging system 40 to 80 [kWh].

[0071] Next, in step S149, the power operation management device 70 records the corrected logical amount of stored electricity in the distributed ledger system 80. In step S150, power operations management device 70 calculates the efficiency of charging and discharging at the time of measuring the current amount of stored power. Specifically, power operations management device 70 calculates the efficiency of charging and discharging at 90% because the total amount of charging and discharging at first charging and discharging system 30 is 700 [kWh], of which 70 [kWh] is a power loss. Also, power operations management device 70 calculates the efficiency of charging and discharging at 80% because the total amount of charging and discharging at second charging and discharging system 40 is 100 [kWh], of which 20 [kWh] is a power loss.

[0072] In step S151, the power operations management device 70 records the charging and discharging efficiency of the first charging and discharging system 30 and the second charging and discharging system 40 in the distributed ledger system 80. Then, in step S152, the power operations management device 70 ends a series of processes related to power operations management.

[0073] FIG. 9 is a flowchart relating to the processing of the power operations management device (also see FIG. 1 as appropriate). The series of processes shown in FIG. 9 is executed by the processor 71 (see FIG. 2) of the power operation management device 70 loading the program 74a from the auxiliary storage device 74 into the main storage device 73. In step S201, the power operation management device 70 accepts settings such as initial values ​​of the charge and discharge efficiencies of the first charge and discharge system 30 and the second charge and discharge system 40. As described above, the initial values ​​of the charge and discharge efficiencies are set based on input operations by the administrator.

[0074] In step S202, the power operation management device 70 receives the measured values ​​of the charge amounts as initial values ​​of the first charge / discharge system 30 and the second charge / discharge system 40, and records them in the distributed ledger system 80. In step S203, the power operation management device 70 receives data on the power supply plan from the first power supply system 10 and the second power supply system 20, and records it in the distributed ledger system 80. In step S204, the power operations management device 70 receives data on the power demand plan from the first power demand system 50 and the second power demand system 60, and records it in the distributed ledger system 80.

[0075] In step S205, the power operations management device 70 sets a charge / discharge plan (operation plan) based on the power supply plan and the power demand plan so as to prioritize reducing power loss associated with charging and discharging, and records the plan in the distributed ledger system 80. In the example of Fig. 5, charge / discharge plans for management IDs: C1 to C4 are set. In step S206, the power operation management device 70 performs charge / discharge setting. That is, the power operation management device 70 transmits data of the charge / discharge plan to the first charge / discharge system 30 and the second charge / discharge system 40.

[0076] In step S207, the power operation management device 70 determines whether it is time to measure the amount of stored power in the first charge / discharge system 30 or the second charge / discharge system 40. If it is not time to measure the amount of stored power (S207: No), the processing of the power operation management device 70 proceeds to step S208. In step S208, the power operation management device 70 determines whether or not data on the charge / discharge amount has been received from the first charge / discharge system 30 or the second charge / discharge system 40. If data on the charge / discharge amount has not been received (S208: No), the processing of the power operation management device 70 returns to step S207.

[0077] Furthermore, if data on the charge / discharge amount has been received in step S208 (S208: Yes), the power operations management device 70 records the charge / discharge amount in the distributed ledger system 80 (S209). Furthermore, if the time to measure the amount of stored electricity has arrived in step S207 (S207: Yes), the processing of the power operations management device 70 proceeds to step S210. In step S210, the power operation management device 70 acquires data on the amount of stored electricity from the first charging / discharging system 30 and the second charging / discharging system 40, and records the data in the distributed ledger system 80.

[0078] In step S211, the power operation management device 70 tally up the charge and discharge amounts for each charge / discharge system and for each type of power. In step S212, the power operation management device 70 corrects the amount of stored power for each type of power and records the corrected values ​​in the distributed ledger system 80. Note that the correction of the amount of stored power is similar to step S148 in Fig. 8C, and therefore a description thereof will be omitted. In step S213, the power operations management device 70 calculates the charging and discharging efficiency at the time of measuring the current amount of stored power in the first charging and discharging system 30 and the second charging and discharging system 40, and updates the value of the charging and discharging efficiency. After performing the process of step S213, the power operations management device 70 ends the series of processes (END). Note that the series of processes shown in Fig. 9 are repeated at predetermined intervals based on the power operations management cycle (for example, every day or every few days).

[0079] <Effects> According to the first embodiment, the power operation management device 70 prioritizes charging and discharging from the first charging / discharging system 30, which has high charging and discharging efficiency. This reduces power loss associated with charging and discharging, and improves efficiency.

[0080] Furthermore, the power operations management device 70 preferentially allocates "first power" that has a high priority based on the type of power (i.e., the type of power generation method) to the first charge / discharge system 30, which has high charging and discharging efficiency. This makes it possible to reduce power loss for each type of power specified by the power operations management device 70. As a result, for example, it becomes possible to preferentially reduce power loss associated with charging and discharging "first power" generated by renewable energy. Furthermore, according to the first embodiment, the power operation management device 70 can manage the charge, discharge, and storage amounts of the first charge / discharge system 30 and the second charge / discharge system 40 for each type of power and present them to the user.

[0081] Second Embodiment The second embodiment differs from the first embodiment in that a charge / discharge plan is created to improve the utilization rate of a type of power with a higher priority. The configuration of the power operations management system 100 (see FIGS. 1 and 2), as well as the power supply plan (see FIG. 3) and the power demand plan (see FIG. 4) are the same as those of the first embodiment. The second embodiment is also the same as the first embodiment in that power efficiency is given a higher priority to "first power" than to "second power" and that the first charge / discharge system 30 has higher charge and discharge efficiency than the second charge / discharge system 40. Therefore, only the differences from the first embodiment will be described, and overlapping portions will not be described.

[0082] FIG. 10 is an explanatory diagram relating to the charge and discharge plan of the power operations management system according to the second embodiment (also see FIG. 1 as appropriate). The charge / discharge plan shown in Fig. 10 is created by the power operations management device 70 based on the power supply plan (see Fig. 3) and the power demand plan (see Fig. 4). Although not shown in Fig. 10, it is assumed that as of 9:30 on August 1, 2022, 500 kWh of "second power" is charged in the first charge / discharge system 30, while the amount of stored power in the second charge / discharge system 40 is zero (see also Fig. 11).

[0083] The charge / discharge plan for management ID: C5 shown in FIG. 10 is a plan to discharge 100 kWh of "second power" of power type T2 and power source type P2 from the first charge / discharge system 30 to the second charge / discharge system 40 during the time period from 9:30 to 9:59 on August 1, 2022. This ensures 600 kWh of free space in the first charge / discharge system 30, allowing all of the 600 kWh of power (management ID: S1 in FIG. 3) subsequently supplied from the first power supply system 10 to be stored in the first charge / discharge system 30. Management ID: C6 shown in FIG. 10 relates to charging of the second charge / discharge system 40 and corresponds to discharging of the first charge / discharge system 30 with management ID: C5.

[0084] In the charge / discharge plan for management ID: C7 shown in FIG. 10, a plan is made to charge 600 kWh of "first power" of power type T1 and power source type P1 from the first power supply system 10 to the first charge / discharge system 30 during the time period of 10:00 to 10:29 on August 1, 2022. In this way, by maximizing the "first power" in the first charge / discharge system 30, which has high charge and discharge efficiency, the use of "first power" is promoted and power loss associated with charging and discharging can be reduced. Note that the charge / discharge plans (supply to the demand side) for management IDs: C3 and C4 in FIG. 10 are the same as those described in the first embodiment (see FIG. 5), and therefore description thereof will be omitted.

[0085] FIG. 11 is an explanatory diagram relating to the transition of the amount of electricity stored in each of the charge / discharge devices (also refer to FIG. 1 as appropriate). The transition of the amount of stored power shown in Fig. 11 corresponds to the power supply plan (see Fig. 3), the power demand plan (see Fig. 4), and the charge / discharge plan (see Fig. 10) described above. The charge capacities of the first charge / discharge system 30 and the second charge / discharge system 40 are each assumed to be 1000 kWh. In the example of Fig. 11, 500 kWh of "second power" has been stored in the first charge / discharge system 30 at "9:30".

[0086] As described above, 100 kWh of "first power" is discharged from the first charging / discharging system 30 to the second charging / discharging system 40 between 9:30 and 9:59 on August 1, 2022 (management ID: C5 in FIG. 10 ). As a result, the state shown at "10:00" in FIG. 11 is reached. This allows all of the 600 kWh of "first power" subsequently supplied from the first power supply system 10 to be charged into the first charging / discharging system 30 (state shown at "10:30" in FIG. 11 ). Therefore, when charging the "first power," the first charging / discharging system 30, which has high charging and discharging efficiency, can be used to the fullest extent. Note that a description of the state shown at "11:30" in FIG. 10 due to charging and discharging using management IDs: C3 and C4, will be omitted.

[0087] Next, we will explain the charge / discharge control in the power operation management system 100. The sequence of the preparation stage for charge / discharge is the same as that in the first embodiment (see FIG. 8A), so its explanation will be omitted. Also, the sequence related to the correction of the charge / discharge amount is the same as that in the first embodiment (see FIG. 8C), so its explanation will be omitted.

[0088] FIG. 12 is a sequence diagram relating to the execution of charging and discharging in the power operation management system (see also FIG. 1 as appropriate). In step S301 of Fig. 12, the first charging / discharging system 30 discharges "second power" to the second charging / discharging system 40 (described as "second discharge supply" in Fig. 12). In the example of Fig. 10, 100 [kWh] of "second power" is discharged from the first charging / discharging system 30 to the second charging / discharging system 40 during the time period from 9:30 to 9:59 on August 1, 2022.

[0089] In step S302, the first charging / discharging system 30 notifies the power operations management device 70 of the measured value of the discharge amount of the "second power". In step S303, the power operations management device 70 records the discharge amount received from the first charging / discharging system 30 in the distributed ledger system 80. In step S304, the second charging / discharging system 40 notifies the power operations management device 70 of the measured value of the charge amount of the "second power". In step S305, the power operations management device 70 records the charge amount received from the second charging / discharging system 40 in the distributed ledger system 80.

[0090] In step S306, at a predetermined time based on the power supply plan, the first power supply system 10 supplies "first power" to the first charge / discharge system 30. In the example of Fig. 10, 600 [kWh] of "first power" is supplied from the first power supply system 10 to the first charge / discharge system 30 during the time period from 10:00 to 10:29 on August 1, 2022.

[0091] In step S307, the first charging / discharging system 30 notifies the power operations management device 70 of the measured value of the charge amount of the "first power." In step S308, the power operations management device 70 records the charge amount of the "first power" received from the first charging / discharging system 30 in the distributed ledger system 80. Note that steps S309 to S314 in FIG. 12 are the same as the processing in this order of steps S127 to S132 (see FIG. 8B) of the first embodiment, and therefore description thereof will be omitted.

[0092] FIG. 13 is a flowchart relating to the processing of the power operations management device (see also FIG. 1 as appropriate). 13 is the same as that of the first embodiment (see FIG. 9), and therefore will not be described again. In step S204, after receiving power demand plan data from the first power demand system 50 and the second power demand system 60 and recording it in the distributed ledger system 80, the processing of the power operations management device 70 proceeds to step S401.

[0093] In step S401, the power operations management device 70 sets a charge / discharge plan with priority given to the type of power and records it in the distributed ledger system 80. In the second embodiment, a charge / discharge plan is created for the "first power" that has a high priority for power efficiency so as to reduce power loss associated with its charging / discharging. In other words, the power operations management device 70 allocates the power supplied from the first power supply system 10 and the second power supply system 20 with a higher priority to charging the first charge / discharge system 30 and the second charge / discharge system 40 with a higher charge and discharge efficiency (charge / discharge efficiency).

[0094] Specifically, when the power operation management device 70 charges the first charging / discharging system 30 with a predetermined amount of power from the first power supply system 10, it discharges the power from the first charging / discharging system 30 to the second charging / discharging system 40 so as to provide an available area in the first charging / discharging system 30 equivalent to this predetermined amount of power (the state of "10:00" in FIG. 6). This allows all of the "first power" to be subsequently charged to the first charging / discharging system 30, which has high charging and discharging efficiency (the state of "10:30" in FIG. 6). Therefore, power loss due to charging and discharging of the "first power" is minimized, allowing the "first power" to be operated with high efficiency.

[0095] After performing the process of step S401, the process of power operation management device 70 proceeds to step S206. Note that the processes of steps S206 to S213 are the same as those in the first embodiment (see FIG. 9), and therefore description thereof will be omitted.

[0096] <Effects> According to the second embodiment, the first charging / discharging system 30, which has high charging / discharging efficiency, is preferentially charged with the "first power," thereby reducing the loss of the "first power" due to charging / discharging. This allows the "first power" to be operated efficiently, thereby promoting the use of the "first power." Furthermore, by allowing the transfer of power from the first charging / discharging system 30 to the second charging / discharging system 40, the first charging / discharging system 30, which has high charging / discharging efficiency, can be used to the fullest extent as a charging target for the "first power."

[0097] Third Embodiment The third embodiment differs from the first embodiment in that the first charging / discharging system 30 (see FIG. 14) and the second charging / discharging system 40 (see FIG. 14) are virtually integrated and managed as a virtual integrated management system 90 (see FIG. 14). The third embodiment also differs from the first embodiment in the method of calculating the charge / discharge amount for each type of power. Note that the configuration of the power operations management system 100A (see FIG. 14) is the same as that of the first embodiment, except for the virtual integrated management system 90 (see FIG. 14). Therefore, only the parts that are different from the first embodiment will be described, and a description of the overlapping parts will be omitted.

[0098] FIG. 14 is a functional block diagram of a power operation management system 100A according to the third embodiment. 14, the power operation management system 100A includes a virtual integrated management system 90. The virtual integrated management system 90 is a system that allows the power operation management device 70 to virtually and integrally manage the first charging / discharging system 30 and the second charging / discharging system 40, and is configured to include the first charging / discharging system 30 and the second charging / discharging system 40.

[0099] In the example of the third embodiment, when actual power (physical power) is operated, power is managed based on the method of the first embodiment (hereinafter referred to as the power loss reduction priority method). On the other hand, when power (virtual power) is operated when the amount of stored power for each type of power is calculated, power is managed based on the method of the second embodiment (hereinafter referred to as the power source type priority method). This processing will be explained using the flowchart of FIG. 15.

[0100] FIG. 15 is a flowchart relating to the processing of the power operations management device (see also FIG. 14 as appropriate). In addition to steps S201 to S210 shown in FIG. 15, the processes of steps S212 and S213 are the same as those in the first embodiment (see FIG. 9), and therefore a description thereof will be omitted. In step S210, data on the amount of stored electricity is acquired from the first charging / discharging system 30 and the second charging / discharging system 40, and recorded in the distributed ledger system 80, after which the processing of the power operation management device 70 proceeds to step S501.

[0101] In step S501, the power operation management device 70 calculates the amount of stored power for each type of remaining power based on the same power loss reduction priority method as in the first embodiment. Note that the "stored power amount" calculated in step S501 is a value (logical stored power amount) that takes into account power loss due to charging and discharging. Here, each stored power amount will be explained using FIG. 16.

[0102] FIG. 16 is an explanatory diagram relating to the amounts of stored electricity in the first charge / discharge system and the second charge / discharge system (also see FIG. 14 as appropriate). 16 shows the amount of stored electricity when operation management is performed based on the power loss reduction priority method similar to that of the first embodiment. As described in the first embodiment, the power loss reduction priority method is a method in which charging or discharging is performed preferentially in the order of the first charging / discharging system 30 and the second charging / discharging system 40, that having the highest charging and discharging efficiency.

[0103] The "power type priority" column in Fig. 16 shows the amount of stored power when operation management is performed based on the same power type priority method as in the second embodiment. As described in the second embodiment, the "power type priority method" is a method in which, as the priority of power supplied from the first power supply system 10 and the second power supply system 20 increases, the power is allocated to the first charge / discharge system 30 and the second charge / discharge system 40 that has the highest charging and discharging efficiency. The "Virtual Power Operation Management" column shown in FIG. 16 shows the amount of stored power based on the virtual power operation management of the third embodiment.

[0104] In the example of FIG. 16, the calculation results of step S501 in FIG. 15 show that the amount of "first power" stored in the first charging / discharging system 30 is 340 [kWh], and the amount of "second power" stored is 390 [kWh] (see the "Power loss reduction priority method" column). The calculation procedure for each of these values ​​is the same as that described in the first embodiment. Therefore, the total amount of power stored in the first charging / discharging system 30 is 730 [kWh].

[0105] In addition, in the second charging / discharging system 40, the stored amount of "first power" is 80 [kWh]. The stored amount of second power is 0 [kWh]. Therefore, the total stored amount of power in the second charging / discharging system 40 is 80 [kWh]. The stored amount of power in the first charging / discharging system 30 (730 [kWh]) and the stored amount of power in the second charging / discharging system 40 (80 [kWh]) when the power loss reduction priority method is executed are referred to as the "first stored amount."

[0106] The power operation management device 70 calculates each storage amount corresponding to the power generation method (i.e., corresponding to "first power" or "second power") from the first storage amounts remaining in each charging / discharging system when the power loss reduction priority method is executed.

[0107] 15, the power operation management device 70 calculates the remaining stored power amount for each type of power when power operation is performed based on the power type priority method similar to that of the second embodiment. Note that the stored power amount calculated in step S502 is also a value (logical stored power amount) that takes into account power loss due to charging and discharging.

[0108] In the example of Fig. 16, the calculation results of step S502 in Fig. 15 show that the amount of stored power for "first power" in the first charging / discharging system 30 is 430 [kWh], and the amount of stored power for "second power" is 280 [kWh] (see the "Power type priority method" column). Therefore, the total amount of stored power in the first charging / discharging system 30 is 710 [kWh].

[0109] Furthermore, in the second charging / discharging system 40, the amount of stored power for the "first power" is 80 [kWh]. On the other hand, the amount of stored power for the "second power" is 0 [kWh]. Therefore, the total amount of stored power in the second charging / discharging system 40 is 80 [kWh]. Note that the amount of stored power (710 [kWh]) in the first charging / discharging system 30 and the amount of stored power (80 [kWh]) in the second charging / discharging system 40 when the power type priority method is executed are referred to as the "second amount of stored power."

[0110] The power operation management device 70 calculates each stored amount of power corresponding to the power generation method (i.e., corresponding to "first power" or "second power") from the second stored amount of power remaining in each charging / discharging system when the power type priority method is executed.

[0111] In step S503 of Fig. 15, the power operations management device 70 calculates the amount of stored power for each type of power based on the virtual power operations management. First, as a breakdown of the amount of stored power in the first charge / discharge system 30 and the second charge / discharge system 40, the power operations management device 70 allocates a "second amount of stored power" to the amount of stored power corresponding to the power generation method with the higher priority (i.e., "first power"). In the example of Fig. 16, in the power type priority method, the amount of stored power for "first power" with the higher priority is 430 [kWh]. This value of 430 [kWh] is used as the amount of stored power for "first power" in the virtual power operations management.

[0112] Furthermore, the power operations management device 70 allocates the value obtained by subtracting the sum of the allocated "second storage amounts" from the total sum of the "first storage amounts" to the storage amount corresponding to the power generation method with the lower priority (i.e., "second power"). In other words, to make the total storage amount 730 [kWh], the power operations management device 70 calculates the storage amount of "second power" (300 [kWh]) by subtracting the storage amount of "first power" (430 [kWh]) based on the power type priority method from the total storage amount based on the power loss reduction priority method (730 [kWh]).

[0113] As described above, the actual power (physical power) is operated using the power loss reduction priority method, resulting in a total stored power amount of 730 kWh. However, the power type priority method is virtually used to calculate the stored power amount for each type of power. This reduces the power loss of each of the "first power" and "second power," while increasing the utilization rate of the "first power," which has a relatively higher priority. In the second charging / discharging system 40, since there is no difference in the stored power amount between the power loss reduction method and the power type priority method, the stored power amount of the "second power" is 80 kWh.

[0114] In this way, after performing the process of step S503 in Fig. 15, the processes of steps S212 and S213 are performed in sequence. Note that the processes of steps S212 and S213 are the same as those in the first embodiment (see Fig. 9), and therefore description thereof will be omitted.

[0115] <Effects> According to the third embodiment, the power operation management device 70 performs actual charging and discharging of power based on the power loss reduction priority method, thereby minimizing power loss associated with charging and discharging. Furthermore, for example, a value (430 kWh) based on the power type priority method is assigned to the amount of power stored in the first charging and discharging system 30 that corresponds to the "first power" with a higher priority. This increases the utilization rate of the "first power." Furthermore, a value (300 kWh) obtained by subtracting the amount of power stored in the "first power" with a lower priority is assigned to the amount of power stored in the first charging and discharging system 30. This allows the calculated total amount of power stored to be consistent with the actual total amount of power stored.

[0116] Fourth Embodiment In the fourth embodiment, a process for updating the efficiency of charging and discharging by the power operations management device 70 will be described. The configuration of the power operations management system 100 (see FIG. 1) is the same as that of the first embodiment. Therefore, only the parts that are different from the first embodiment will be described, and a description of the overlapping parts will be omitted.

[0117] FIG. 17 is an explanatory diagram relating to power operations management over multiple days in a power operations management system according to the fourth embodiment (see also FIG. 1 as appropriate). 17, based on an input operation by the administrator, initial values ​​of the charge and discharge efficiencies of the first charge and discharge system 30 and the second charge and discharge system 40 are input to the power operations management device 70. These initial values ​​of the charge and discharge efficiencies are associated with the first charge and discharge system 30 and the second charge and discharge system 40, and are stored in the power operations management device 70 as charge and discharge efficiency data DT1.

[0118] Then, after performing operation management for the first day from the time of initial setup or the end of maintenance, the power operation management device 70 calculates the charge and discharge efficiency at the end of this operation management and updates the charge and discharge efficiency data DT1. In reality, the charge and discharge efficiency changes from moment to moment, but the charge and discharge efficiency value at the end of the first day is used as the average charge and discharge efficiency when performing operation management for the next second day.

[0119] Furthermore, when starting the operational management for the second day, the power operations management device 70 sets the value of the charge and discharge efficiency data DT1 (the charge and discharge efficiency at the end of the first day) as the charge and discharge efficiency of the first charge and discharge system 30 and the second charge and discharge system 40. When the operational management for the second day ends, the power operations management device 70 calculates the charge and discharge efficiency at the end of this operational management and updates the charge and discharge efficiency data DT1. Similarly, when starting operations management on the Nth day, the power operations management device 70 sets the value of the charge and discharge efficiency data DT1 (the charge and discharge efficiency at the end of the (N-1)th day) as the charge and discharge efficiency of the first charge and discharge system 30 and the second charge and discharge system 40. When operations management on the Nth day ends, the power operations management device 70 calculates the charge and discharge efficiency at the end of this operations management and updates the charge and discharge efficiency data DT1.

[0120] In this way, the power operation management device 70 calculates the charge and discharge efficiency (charge and discharge efficiency) for each of the first charge and discharge system 30 and the second charge and discharge system 40 during a first predetermined period (e.g., the (N-1)th day), and performs power operation management during a second predetermined period (e.g., the Nth day) that follows the first predetermined period based on this charge and discharge efficiency. Note that the length of the "first predetermined period" and "second predetermined period" is not limited to one day, and may be shorter than one day, or may be several days or several weeks.

[0121] <Effects> According to the fourth embodiment, the power operation management device 70 updates the charge / discharge efficiency data at the end of each day's power operation management, thereby enabling appropriate power operation management to be performed based on the latest charge and discharge efficiencies in the first charge / discharge system 30 and the second charge / discharge system 40.

[0122] <<Variations>> Although the power operation management system 100 according to the present invention has been described in each embodiment above, the present invention is not limited to these descriptions and various modifications can be made. For example, in each embodiment, a case has been described in which the "first power" is power generated from renewable energy and the "second power" is power generated from non-renewable energy, but this is not limiting. As another specific example, power generated from solar power generation may be the "first power" and power generated from wind power generation may be the "second power." Furthermore, power generated from nuclear power generation may be the "first power" and power generated from thermal power generation may be the "second power." Various other combinations are also possible.

[0123] Furthermore, in each embodiment, the case where there are two "power supply systems" (the first power supply system 10 and the second power supply system 20) has been described, but the number of "power supply systems" may be three or more. Note that the multiple "power supply systems" include a mixture of systems with different power generation methods. Incidentally, systems with a common power generation method may be treated as having the same priority for power efficiency, or may be assigned different priorities based on identification information, etc. For example, in the second embodiment, suppose there are n power sources with different priorities and m charging / discharging systems with different charging / discharging efficiencies. In such a case, the power operation management 70 may create a charging / discharging plan so that the power source with the highest priority is charged to the maximum extent possible in the charging / discharging system with the highest charging / discharging efficiency. Note that the power source with the second highest priority is preferentially charged, for example, in the available space of the charging / discharging system with the highest charging / discharging efficiency among the m charging / discharging systems. The same applies to the power sources with the third and lower priorities.

[0124] In addition, in each embodiment, the case where the number of "charge / discharge systems" is two (first charge / discharge system 30 and second charge / discharge system 40) has been described, but the number of "charge / discharge systems" may be three or more. Note that the multiple "charge / discharge systems" include a mixture of systems with different charge and discharge efficiencies (charge / discharge efficiencies). For example, in the first embodiment, if there are n "charge / discharge systems" with different charge / discharge efficiencies, charge / discharge may be performed in order of priority starting with the system with the highest charge / discharge efficiency, followed by the system with the second highest charge / discharge efficiency, the third highest charge / discharge efficiency, and so on.

[0125] Furthermore, in each embodiment, the case where the number of "power demand systems" is two (first power demand system 50 and second power demand system 60) has been described, but the number of "power demand systems" may be one, or may be three or more. In other words, it is sufficient that at least one "power demand system" is connected to the power network N1.

[0126] Furthermore, the respective embodiments can be combined as appropriate. For example, the power operations management device 70 may execute the power loss reduction priority method based on the first embodiment for a predetermined period of time, and execute the power type priority method based on the second embodiment for another period after the predetermined period (or the reverse order may be used). Furthermore, the power loss reduction priority method and the power type priority method may be executed alternately over time.

[0127] Also, for example, the power operation management device 70 may execute the power loss reduction priority method based on the first embodiment in a specified area, and execute the power type priority method based on the second embodiment in another area. Furthermore, each embodiment may be applied to a BESS (Battery Energy Storage System) to manage the amount of stored power based on the type of power.

[0128] Furthermore, the program executed by the power operation management system 100 (such as a program for a power operation management method) can be provided via a communication line, or can be written onto a recording medium such as a CD-ROM and distributed.

[0129] Furthermore, each embodiment has been described in detail to clearly explain the present invention, and is not necessarily limited to having all of the described configurations. Furthermore, it is possible to add, delete, or replace some of the configurations of the embodiments with other configurations. Furthermore, the above-described mechanisms and configurations are those considered necessary for explanation, and do not necessarily represent all of the mechanisms and configurations of the product. [Explanation of symbols]

[0130] 10. First Power Supply System (Power Supply System) 20 Second Power Supply System (Power Supply System) 30 First charging / discharging system (charging / discharging system) 40 Second charging / discharging system (charging / discharging system) 50 First Electricity Demand System (Electricity Demand System) 60 Second Power Demand System (Power Demand System) 70 Power operation management equipment 80 Distributed Ledger System 90 Virtual Integrated Management System 100,100A Power Operation Management System N1 Power Network

Claims

1. A power operation management device that manages the charging and discharging of a plurality of charging and discharging systems is provided, the plurality of charging / discharging systems are respectively connected to a plurality of power supply systems via a power network and to at least one power demand system; the plurality of charge / discharge systems include a first charge / discharge system and a second charge / discharge system having a charge / discharge efficiency lower than that of the first charge / discharge system, as systems having different charge / discharge efficiencies; the plurality of power supply systems include a first power supply system and a second power supply system that uses a power generation method different from that of the first power supply system, as systems that use different power generation methods; the power operations management device sets charge and discharge plans for the plurality of charge and discharge systems based on the charge and discharge efficiency and the priority of power efficiency associated with the power generation method; the power generation method of the first power supply system has a higher priority than the power generation method of the second power supply system, The power operation management system, when the time period for charging with power from the first power supply system and the time period for charging with power from the second power supply system overlap at least partially, allocates power from the first power supply system to charging the first charging / discharging system and allocates power from the second power supply system to charging the second charging / discharging system during at least a portion of the time period.

2. A power operation management device that manages the charging and discharging of a plurality of charging and discharging systems is provided, the plurality of charging / discharging systems are respectively connected to a plurality of power supply systems via a power network and to at least one power demand system; The plurality of charge / discharge systems include a mixture of systems with different charge / discharge efficiencies, The plurality of power supply systems include a mixture of systems using different power generation methods, The power operations management device setting charge and discharge plans for the plurality of charge and discharge systems based on the charge and discharge efficiency and the priority order of power efficiency associated with the power generation method; A power operation management system that allocates power supplied from the plurality of power supply systems to a charging / discharging system having a higher charging / discharging efficiency in accordance with the higher priority of the power supplied from the plurality of power supply systems.

3. A power operation management device that manages the charging and discharging of a plurality of charging and discharging systems is provided, the plurality of charging / discharging systems are respectively connected to a plurality of power supply systems via a power network and to at least one power demand system; the plurality of charge / discharge systems include a first charge / discharge system and a second charge / discharge system having a charge / discharge efficiency lower than that of the first charge / discharge system, as systems having different charge / discharge efficiencies; the plurality of power supply systems include a first power supply system and a second power supply system that uses a power generation method different from that of the first power supply system, as systems that use different power generation methods; the power operations management device sets charge and discharge plans for the plurality of charge and discharge systems based on the charge and discharge efficiency and the priority of power efficiency associated with the power generation method; the power generation method of the first power supply system has a higher priority than the power generation method of the second power supply system, The power operation management system, wherein when the power operation management device charges a predetermined amount of power from the first power supply system to the first charging / discharging system, the power operation management device discharges from the first charging / discharging system to the second charging / discharging system so as to provide free space in the first charging / discharging system equivalent to the predetermined amount of power.

4. The power operation management device causes the charging or discharging system having the highest charging or discharging efficiency to be given priority among the plurality of charging or discharging systems. The power operation management system according to claim 1 .

5. When charging a predetermined amount of power from the first power supply system, the power operation management device charges the free space in the first charge / discharge system, and charges the amount that is insufficient in the free space in the second charge / discharge system. The power operation management system according to claim 1 .

6. The power operations management device Calculating each storage amount corresponding to the power generation method among the first storage amounts remaining in each of the charge / discharge systems when a power loss reduction priority method is executed in which charging or discharging is performed preferentially in order of the system having the highest charge / discharge efficiency among the plurality of charge / discharge systems; and calculating each storage amount corresponding to the power generation method among the second storage amounts remaining in each of the charge / discharge systems when a power type priority method is executed in which the higher the priority of the power supplied from the plurality of power supply systems, the higher the charge / discharge efficiency of the power supply system; As a breakdown of the amounts of stored electricity in the plurality of charging / discharging systems, the second amount of stored electricity is allocated to the amount of stored electricity corresponding to the power generation methods on the higher priority side, and a value obtained by subtracting the sum of the second amount of stored electricity that has already been allocated from the sum of the first amount of stored electricity is allocated to the amount of stored electricity corresponding to the power generation methods on the lower priority side. The power operation management system according to any one of claims 1 to 3, characterized in that

7. The power operation management device calculates a charge / discharge efficiency for a first predetermined period for each of the plurality of charge / discharge systems, and performs power operation management for a second predetermined period after the first predetermined period based on the charge / discharge efficiency. The power operation management system according to any one of claims 1 to 3, characterized in that

8. A power operation management device that manages charging and discharging of a plurality of charging and discharging systems, the plurality of charging / discharging systems are respectively connected to a plurality of power supply systems via a power network and to at least one power demand system; the plurality of charge / discharge systems include a first charge / discharge system and a second charge / discharge system having a charge / discharge efficiency lower than that of the first charge / discharge system, as systems having different charge / discharge efficiencies; the plurality of power supply systems include a first power supply system and a second power supply system that uses a power generation method different from that of the first power supply system, as systems that use different power generation methods; setting charge and discharge plans for the plurality of charge and discharge systems based on the charge and discharge efficiency and the priority order of power efficiency associated with the power generation method; the power generation method of the first power supply system has a higher priority than the power generation method of the second power supply system, When a time period for charging with power from the first power supply system and a time period for charging with power from the second power supply system overlap at least partially, during at least that portion of the time period, the power from the first power supply system is allocated to charging the first charging / discharging system, and the power from the second power supply system is allocated to charging the second charging / discharging system.

9. A power operation management device that manages charging and discharging of a plurality of charging and discharging systems, the plurality of charging / discharging systems are respectively connected to a plurality of power supply systems via a power network and to at least one power demand system; The plurality of charge / discharge systems include a mixture of systems with different charge / discharge efficiencies, The plurality of power supply systems include a mixture of systems using different power generation methods, setting charge and discharge plans for the plurality of charge and discharge systems based on the charge and discharge efficiency and the priority order of power efficiency associated with the power generation method; a power operations management device that allocates power supplied from the plurality of power supply systems to a charging / discharging system having a higher charging / discharging efficiency in accordance with the higher priority of the power supplied from the plurality of power supply systems;

10. A power operation management device that manages charging and discharging of a plurality of charging and discharging systems, the plurality of charging / discharging systems are respectively connected to a plurality of power supply systems via a power network and to at least one power demand system; the plurality of charge / discharge systems include a first charge / discharge system and a second charge / discharge system having a charge / discharge efficiency lower than that of the first charge / discharge system, as systems having different charge / discharge efficiencies; the plurality of power supply systems include a first power supply system and a second power supply system that uses a power generation method different from that of the first power supply system, as systems that use different power generation methods; setting charge and discharge plans for the plurality of charge and discharge systems based on the charge and discharge efficiency and the priority order of power efficiency associated with the power generation method; the power generation method of the first power supply system has a higher priority than the power generation method of the second power supply system, A power operations management device that, when charging a predetermined amount of power from the first power supply system to the first charging / discharging system, discharges power from the first charging / discharging system to the second charging / discharging system so as to provide free space in the first charging / discharging system equivalent to the predetermined amount of power.

11. A power operation management method for managing charging and discharging of a plurality of charging and discharging systems, comprising: the plurality of charging / discharging systems are respectively connected to a plurality of power supply systems via a power network and to at least one power demand system; the plurality of charge / discharge systems include a first charge / discharge system and a second charge / discharge system having a charge / discharge efficiency lower than that of the first charge / discharge system, as systems having different charge / discharge efficiencies; the plurality of power supply systems include a first power supply system and a second power supply system that uses a power generation method different from that of the first power supply system, as systems that use different power generation methods; setting charge and discharge plans for the plurality of charge and discharge systems based on the charge and discharge efficiency and the priority order of power efficiency associated with the power generation method; the power generation method of the first power supply system has a higher priority than the power generation method of the second power supply system, A power operations management method, wherein, when a time period for charging with power from the first power supply system and a time period for charging with power from the second power supply system overlap at least partially, during at least that part of the time period, power from the first power supply system is allocated to charging the first charging / discharging system, and power from the second power supply system is allocated to charging the second charging / discharging system.

12. A power operation management method for managing charging and discharging of a plurality of charging and discharging systems, comprising: the plurality of charging / discharging systems are respectively connected to a plurality of power supply systems via a power network and to at least one power demand system; The plurality of charge / discharge systems include a mixture of systems with different charge / discharge efficiencies, The plurality of power supply systems include a mixture of systems using different power generation methods, setting charge and discharge plans for the plurality of charge and discharge systems based on the charge and discharge efficiency and the priority order of power efficiency associated with the power generation method; A power operation management method, wherein the higher the priority of the power supplied from the plurality of power supply systems, the higher the power is allocated to charging the charging / discharging system having the highest charging / discharging efficiency among the plurality of power supply systems.

13. A power operation management method for managing charging and discharging of a plurality of charging and discharging systems, comprising: the plurality of charging / discharging systems are respectively connected to a plurality of power supply systems via a power network and to at least one power demand system; the plurality of charge / discharge systems include a first charge / discharge system and a second charge / discharge system having a charge / discharge efficiency lower than that of the first charge / discharge system, as systems having different charge / discharge efficiencies; the plurality of power supply systems include a first power supply system and a second power supply system that uses a power generation method different from that of the first power supply system, as systems that use different power generation methods; setting charge and discharge plans for the plurality of charge and discharge systems based on the charge and discharge efficiency and the priority order of power efficiency associated with the power generation method; the power generation method of the first power supply system has a higher priority than the power generation method of the second power supply system, A power operation management method, comprising: when charging a predetermined amount of power from the first power supply system to the first charging / discharging system, discharging from the first charging / discharging system to the second charging / discharging system so as to provide free space in the first charging / discharging system equivalent to the predetermined amount of power.

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