Energy supply evaluation system and energy supply evaluation method

Abstract

To provide a highly convenient energy supply evaluation system and the like.SOLUTION: An energy supply evaluation system P1 includes a processing unit 30 that causes, when supplying surplus energy based on a difference between an amount of power generated and an amount of power consumed at a site A where a solar power generation panel 61 and a factory 62 are provided to another site B, a display device 3 to display one or more of a plurality of plans including a plan for supplying energy by power transmission and another plan for supplying energy by producing and transporting fuel for power generation, in association with an amount of carbon dioxide emission and a cost associated with the supply of energy.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an energy supply evaluation system and the like. [Background technology]

[0002] One known technology for effectively utilizing surplus electricity generated by renewable energy generation is described in Patent Document 1. Patent Document 1 describes a battery delivery system that includes a "management unit that issues delivery instructions to deliver batteries to a power generation facility using a mobile object, and delivers the batteries charged at the power generation facility to consumers using the mobile object." [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-26119 Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology described in Patent Document 1, batteries charged in a power generation facility are delivered to consumers by mobile vehicles, but since the means for supplying surplus electricity (energy) to consumers is limited to batteries, there is room for improvement in terms of convenience.

[0005] Therefore, an object of the present disclosure is to provide a highly convenient energy supply evaluation system and the like. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the energy supply evaluation system according to the present disclosure includes a processing unit that, when supplying surplus energy based on the difference between the amount of power generated and the amount of power consumed at a base where power generation equipment and load equipment are installed to another base, displays on a display device one or more of a plurality of plans, including a plan to supply the energy by power transmission and another plan to supply the energy by producing and transporting fuel for power generation, in association with the carbon dioxide emissions and costs associated with the supply of the energy. [Effects of the Invention]

[0007] According to the present disclosure, a highly convenient energy supply evaluation system and the like can be provided. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is an explanatory diagram of an energy supply evaluation system according to an embodiment; [Figure 2] FIG. 2 is a diagram illustrating an example of a hardware configuration of an energy supply evaluation device included in the energy supply evaluation system according to the embodiment. [Figure 3] 2 is a functional block diagram including a processing unit of an energy supply evaluation device included in the energy supply evaluation system according to the embodiment. FIG. [Figure 4] FIG. 2 is a functional block diagram of an in-base power surplus / deficiency calculation unit of the energy supply evaluation system according to the embodiment. [Figure 5] FIG. 2 is a functional block diagram of a power generation fuel production transportation amount calculation unit of the energy supply evaluation system according to the embodiment. [Figure 6] FIG. 10 is an explanatory diagram illustrating a comparison of energy supply breakdowns, carbon dioxide emissions, and costs for a plurality of plans of the energy supply evaluation system according to the embodiment. [Figure 7] 10 is a flowchart of a process executed by a processing unit of the energy supply evaluation system according to the embodiment. [Figure 8] 1 is a flowchart relating to a decarbonization evaluation calculation of an energy supply evaluation system according to an embodiment. [Figure 9]10 is an example of a display screen relating to energy supply between bases in the energy supply evaluation system according to the embodiment. [Figure 10] 10 is a flowchart of a process executed by a processing unit of an energy supply evaluation system according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] <Embodiment> <Configuration of the energy supply evaluation system> FIG. 1 is an explanatory diagram of an energy supply evaluation system P1 according to an embodiment. Note that multiple arrows in Fig. 1 indicate the supply of electricity. The energy supply evaluation system P1 shown in Fig. 1 is a system that presents to a user plans for supplying surplus energy generated by power generation at a certain base (for example, base A) to another base (for example, base B). The energy supply evaluation system P1 also has a function of calculating the carbon dioxide emissions and expenses (costs) associated with energy supply for multiple candidate plans and presenting the calculation results to the user.

[0010] In the following example, we will explain a case where both renewable energy power generation equipment and load equipment that consumes electricity are installed at each site. Examples of renewable energy power generation methods include solar power generation, wind power generation, biomass power generation, and temperature difference power generation. Examples of load equipment that consumes electricity include machinery, computers, and air conditioners in factories.

[0011] The base from which the surplus energy is supplied and the base to which the energy is supplied may belong to different business entities (companies or local governments) or may belong to a common business entity. The "base" mentioned above is a location where equipment that is the subject (unit) of an electricity contract is installed. Incidentally, a business establishment that belongs to a specific business entity may also be treated as a "base."

[0012] In the example of FIG. 1, a solar power generation panel 61 is provided as power generation equipment at site A, and a factory 62 is provided as load equipment. Site A is also provided with a hydrogen production device 63 that produces hydrogen (fuel for power generation) by electrolysis of water, and a site controller 64. The power generated by the solar power generation panel 61 is supplied to one or more of the factory 62, the hydrogen production device 63, and the power grid E1. The controller 64 switches the supply destination of the power generated by the solar power generation panel 61.

[0013] Another site B is equipped with solar panels 71 as power generation equipment and a factory 72 as load equipment, as well as a hydrogen-mixed combustion generator 73 and a site controller 74. The power generated by the hydrogen-mixed combustion generator 73 is supplied to the factory 72. The power generated by the solar panels 71 is supplied to either the factory 72 or the power grid E1, or to both. The controller 74 switches the supply destination of the power generated by the solar panels 71.

[0014] Note that the configuration shown in Fig. 1 is an example and is not limited to this. Also, although two bases A and B are shown in the example of Fig. 1, the number of bases may be three or more. Usually, there are many bases where power generation facilities and load facilities are installed. Also, although not shown in Fig. 1, it is assumed that each of bases A and B is equipped with a chargeable and dischargeable battery.

[0015] As shown in Fig. 1, the solar power generation panels 61 and factory 62 at site A are electrically connected to the power grid E1. Similarly, the solar power generation panels 71 and factory 72 at site B are electrically connected to the power grid E1. Note that, because generating electricity using solar power generation panels is less expensive than purchasing electricity from the power grid E1, the electricity generated by the solar power generation panels 61 is used preferentially to operate the factory 72 at site A (the same applies to site B).

[0016] Furthermore, depending on the weather and the time of day, the power generated by the solar power generation panels 61 may exceed the power consumption of the factory 62. In this case, the surplus power is used, for example, as a power source for operating the hydrogen production device 63. Furthermore, if bases A and B are the same business entity (or have a close relationship through capital ties, etc.), it is also possible for base A to perform self-consignment of power to base B. Note that "self-consignment" of power means that power generated by a business operator's private power generation equipment is transmitted to the business operator's own equipment in another area via the power grid E1 owned by a general electric utility (such as an electric power company). Such "self-consignment" can reduce power costs such as consignment charges and promote the use of renewable energy.

[0017] Alternatively, it is possible to temporarily store surplus generated power in a battery (not shown) at site A, and then supply power from the battery (not shown) to the factory 62 during a time period when the power generated by the solar power generation panel 61 is lower than the power consumption of the factory 62. How the surplus power is used is determined based on instructions from the energy supply evaluation device 1, which will be described later, to the controller 64 at site A.

[0018] In addition, if a disaster or other event causes a break in transmission or distribution lines, or if a general electric utility issues a request for output control, self-dispatch may become temporarily difficult. For example, if self-dispatch is performed from base A to base B via power grid E1, and the transmitted power of power grid E1 is about to exceed its transmission capacity, the general electric utility may issue a request for output control. In addition, if the amount of power generated within the area including bases A and B cannot be used within that area, the general electric utility may issue a request for output control. In such cases, self-dispatch of power becomes temporarily difficult.

[0019] On the other hand, the use of carbon-neutral (CN) fuels such as hydrogen is expanding as a so-called CN energy source. For example, one method of supplying electricity from base A to base B is to produce hydrogen using surplus electricity generated at base A and transport this hydrogen to base B, which is short of electricity. In other words, when supplying surplus energy generated at base A to base B, in addition to the option of self-consignment of electricity, there are also options to produce and transport hydrogen, or to use part of the surplus energy for hydrogen production and transportation and self-consignment of the remainder.

[0020] In the example of FIG. 1, hydrogen produced by hydrogen production equipment 63 at site A is filled into hydrogen tank T1. Hydrogen tank T1 is transported to site B by hydrogen transport vehicle V1. At site B, power is generated in a hydrogen-mixed combustion generator 73 using the hydrogen transported from site A. Incidentally, mixing and burning multiple types of fuel is called "mixed combustion." The power generated by the hydrogen-mixed combustion generator 73 is supplied to factory 72 during times when the power generated by solar power generation panels 71 is lower than the power consumption of factory 72. The power generated by the hydrogen-mixed combustion generator 73 may be temporarily charged into a battery (not shown) and then supplied from the battery to factory 72 as needed.

[0021] In addition to the solar power generation panels 61 and 71 at bases A and B, the business operator must purchase the hydrogen production device 63 at base A and the hydrogen co-fired generator 73 at base B, and perform regular maintenance on them, incurring certain costs. Transporting hydrogen from base A to base B using the hydrogen transport vehicle V1 also incurs certain costs. Furthermore, transporting hydrogen using the hydrogen transport vehicle V1, which is powered by an internal combustion engine, and operating the hydrogen co-fired generator 73, which uses a mixture of hydrogen and fossil fuels, results in the emission of certain amounts of carbon dioxide.

[0022] On the other hand, businesses often desire to keep carbon dioxide emissions and costs below desired values. Therefore, in the first embodiment, when surplus energy generated by power generation at a certain base is supplied to another base, the energy supply evaluation device 1 presents to the user data (carbon dioxide emissions and costs) that serve as evaluation indicators for determining which plan is appropriate.

[0023] <Configuration of energy supply evaluation device> The energy supply evaluation device 1 shown in Fig. 1 is a device that presents to a user a plan for supplying surplus energy generated by power generation at a certain base to another base, and also calculates and presents to the user the carbon dioxide emissions and costs associated with the energy supply. A computer such as a personal computer may be used as this energy supply evaluation device 1. The energy supply evaluation device 1 may also be configured by connecting multiple computers in a predetermined manner via communication lines or a network. For example, the functions of the energy supply evaluation device 1 may be distributed across multiple computers such as cloud servers or edge servers.

[0024] As shown in Fig. 1, the energy supply evaluation device 1 includes a communication unit 10, a storage unit 20, and a processing unit 30. The communication unit 10 transmits and receives data to and from controllers 64, 74 at bases A, B via a network N1. The storage unit 20 stores predetermined programs in advance, as well as data received via the communication unit 10 and data input via the input device 2. The processing unit 30 executes predetermined processing based on the programs and data stored in the storage unit 20. The processing executed by the processing unit 30 will be described later.

[0025] The input device 2 is used by the user to input data and is connected to the energy supply evaluation device 1. For example, a keyboard or a mouse is used as the input device 2. The display device 3 is a device that displays the calculation results of the energy supply evaluation device 1 and is connected to the energy supply evaluation device 1. For example, a liquid crystal display is used as the display device 3. Note that a touch panel type mobile terminal that combines the functions of the input device 2 and the display device 3, such as a smartphone or tablet, may also be used.

[0026] FIG. 2 is a diagram illustrating an example of the hardware configuration of the energy supply evaluation device 1. As shown in FIG. As shown in FIG. 2, the energy supply evaluation device 1 has, as its hardware configuration, a processor 1a, a RAM 1b (Random Access Memory), a ROM 1c (Read Only Memory), a HDD 1d (Hard Disk Drive), a communication interface 1e, and an input / output interface 1f, which are connected in a predetermined manner via an internal bus 1g.

[0027] The processor 1a is hardware that constitutes the processing unit 30 (see FIG. 1) of the energy supply evaluation device 1. The RAM 1b, ROM 1c, and HDD 1d are hardware that constitute the storage unit 20 (see FIG. 1) of the energy supply evaluation device 1. The processor 1a reads out a predetermined program stored in the ROM 1c or HDD 1d and loads it into the RAM 1b, thereby executing predetermined processing.

[0028] The communication interface 1e performs predetermined communication via the network N1 with the controller 64 at the site A (see FIG. 1) and the controller 74 at the site B (see FIG. 1). The input / output interface 1f is an interface for inputting data from the input device 2 and outputting data to the display device 3. These input / output interface 1f and communication interface 1e function as the communication unit 10 (see FIG. 1) of the energy supply evaluation device 1. Note that the hardware configuration shown in FIG. 2 is an example and is not limited to this.

[0029] FIG. 3 is a functional block diagram including a processing unit 30 of the energy supply evaluation device. As shown in FIG. 3, the processing unit 30 includes, as its functional configuration, a supply method selection unit 31, a discharge amount calculation unit 32, a supply method determination unit 33, and a display data generation unit . The supply method selection unit 31 selects from among multiple candidate plans for a supply method for supplying surplus energy generated at a certain base to another base, based on predetermined input data and constraints. The constraints include an output control rate notified when a general electric utility requests output control. The output control rate is the ratio of the amount of power generated when output control is performed to the amount of power generated when output control is not performed.

[0030] 3, the supply method selection unit 31 includes an intra-base station power surplus / deficiency calculation unit 311, an inter-base station power supply amount calculation unit 312, a power generation fuel production and transportation amount calculation unit 313, and a plan selection unit 314. In addition to the components described above, the supply method selection unit 31 also includes a power supply allocation ratio calculation unit 315, an inter-base station power transmission instruction unit 316, a power generation fuel transportation instruction unit 317, and a power generation fuel production instruction unit 318.

[0031] The intra-site power surplus / deficiency calculation unit 311 calculates the amount of power surplus / deficiency based on the geographical information and facility specifications of each site included in the input data. That is, the intra-site power surplus / deficiency calculation unit 311 calculates the difference between the predicted value of the amount of power generated and the predicted value of the amount of power consumed for each time period for each site, and sets the calculation result as the amount of power surplus / deficiency for each time period.

[0032] The geographic information included in the input data may be the latitude and longitude of each location, or the address of each location. The equipment specifications for each location include the specifications of the power generation equipment that uses renewable energy and the specifications of the load equipment that consumes the electricity. Additionally, when calculating the power surplus or shortage, past weather information and historical information on the power generation and power consumption at each location may be used as appropriate.

[0033] The inter-site power supply amount calculation unit 312 calculates the amount of power supply from the site with excess power to the site with a power shortage, based on the power surplus / shortage amount calculated by the intra-site power surplus / shortage calculation unit 311. The power generation fuel production and transportation amount calculation unit 313 calculates the production and transportation amount of the power generation fuel, and calculates the consumption amount of transportation fuel such as gasoline required to transport the power generation fuel, based on the power surplus / deficiency amount calculated by the intra-base power surplus / deficiency amount calculation unit 311 and the geographical information of each base. The power generation fuel production and transportation amount calculation unit 313 calculates, for example, the consumption amount of transportation fuel such as gasoline when transporting the power generation fuel in the hydrogen transport vehicle V1 shown in Figure 1.

[0034] The plan selection unit 314 generates multiple plans for energy supply methods based on the amount of power supply (i.e., the amount of power transmission) from a base with excess power to a base with a power shortage, the amount of power produced and transported for power generation fuel, the carbon dioxide emission and cost reduction requests at each base, and predetermined constraints. The plan selection unit 314 also selects a predetermined plan from the multiple plans and calculates the amount of power to be stored in a battery (not shown) for each time period.

[0035] The power supply allocation ratio calculation unit 315 calculates the allocation ratio of the amount of power when transmitting power to each base by self-consignment or the like, based on the plan of the energy supply method selected by the plan selection unit 314. That is, when generating a plan for transmitting power between bases as one of multiple plans, the power supply allocation ratio calculation unit 315 (i.e., the processing unit 30) sets the allocation ratio of the amount of power based on the size of the power shortage at each base. More specifically, for multiple bases that are likely to experience a power shortage if they do not use purchased power from the power grid E1 (not shown), the larger the power shortage, the higher the power allocation ratio.

[0036] The inter-base power transmission instruction unit 316 transmits a power transmission instruction to a controller of a predetermined base (for example, the controller 64 of base A: see FIG. 1) based on the amount of power supply between the bases. The power transmission instruction is a command signal for transmitting power from the predetermined base via the power grid E1 (see FIG. 1) in each future time period.

[0037] The power generation fuel transport instruction unit 317 transmits a power generation fuel transport instruction to a controller at a predetermined base (for example, controller 64 at base A: see FIG. 1) based on the amount of power generation fuel to be transported. The power generation fuel transport instruction is a command signal for transporting power generation fuel from a predetermined base to another base in each future time period.

[0038] The power generation fuel production instruction unit 318 transmits a power generation fuel production instruction to a controller at a predetermined base (for example, controller 64 at base A: see FIG. 1) based on the production amount of power generation fuel. The power generation fuel production instruction is a command signal to produce power generation fuel at a predetermined base in each future time period.

[0039] The emission amount calculation unit 32 calculates the carbon dioxide emissions (CO2 amount in FIG. 3) and costs associated with energy supply between bases based on the equipment specifications included in the input data, the amount of electricity supplied between bases (i.e., the amount of electricity transmitted), and the amount of fuel produced and transported for power generation. The costs associated with energy supply between bases are calculated as the sum of, for example, CAPEX (Capital Expenditure) required for the introduction of equipment such as a hydrogen production device and a hydrogen co-fuel generator, and OPEX (Operating Expenditure) required for the use and maintenance of the equipment.

[0040] Specifically, the emission calculation unit 32 (i.e., the processing unit 30) calculates the costs associated with energy supply based on the installation costs of equipment including power generation equipment, the maintenance costs of the equipment, the transportation costs of power generation fuel, and the cost of power consumption associated with supplying energy between bases. This accurately calculates the actual costs for each plan (values ​​including the cost of transporting power generation fuel), making it possible to appropriately identify which plan will be cheaper. The installation costs and maintenance costs of the equipment are included in the input data.

[0041] The supply method determination unit 33 determines a plan for an energy supply method by comparing the plan selected by the supply method selection unit 31 with the requested reduction amounts of carbon dioxide emissions and costs, and predetermined constraints. Note that AI (Artificial Intelligence) may be configured to perform the processing of the supply method determination unit 33. Furthermore, instead of the supply method determination unit 33, the energy supply method may be determined by a user's operation via the input device 2.

[0042] The display data generation unit 34 displays the plan determined by the supply method determination unit 33 and the carbon dioxide emissions and costs calculated by the emission calculation unit 32 in a predetermined manner on the display device 3. Note that, as reference information, the fuel price in the area including the base where energy is supplied may also be displayed. As shown in Fig. 3, the fuel price in the area is included in the input data.

[0043] FIG. 4 is a functional block diagram of the in-base power surplus / deficiency calculation unit 311. As shown in FIG. As shown in Fig. 4, the intra-site power surplus / deficiency calculation unit 311 includes a site power consumption calculation unit 311a, a PV power generation amount calculation unit 311b, and a subtractor 311c. The site power consumption calculation unit 311a calculates (predicts) the amount of power consumption at a specific site for each time period based on the equipment specifications and weather information of the site. Here, the weather information is forecast information that indicates the weather for each time period in an area including the site. For example, the site power consumption calculation unit 311a predicts the amount of power consumption for each time period of multiple sites including sites A and B (see Fig. 1).

[0044] The PV power generation amount calculation unit 311b calculates (predicts) the amount of power generation for each time period based on the equipment specifications of the solar power generation panels installed at a specific location and weather information. For example, the PV power generation amount calculation unit 311b predicts the amount of power generation for each time period at multiple locations including locations A and B (see FIG. 1). Note that "PV" is an abbreviation for Photovoltaic (solar power generation).

[0045] The subtractor 311c calculates the in-site power surplus / shortage by subtracting the amount of PV power generation from the amount of power consumption at the site. For example, the subtractor 311c calculates the in-site power surplus / shortage for this time period by subtracting the amount of PV power generation from the amount of power consumption at site A (see FIG. 1). In a similar manner, the subtractor 311c calculates the in-site power surplus / shortage for other time periods (every hour) at site A (the same applies to other sites). Note that the above-mentioned "every hour" is an example and is not limiting. For example, the in-site power surplus / shortage may be calculated every 30 minutes or every two hours.

[0046] In this way, the intra-site power surplus / deficiency calculation unit 311 (i.e., the processing unit 30: see FIG. 1) calculates the amount of power generation based on the specification information of the power generation equipment and weather information, and calculates the amount of power consumption based on the specification information of the load equipment. Then, the intra-site power surplus / deficiency calculation unit 311 calculates the amount of power surplus / deficiency, which is the surplus or shortage of energy at each site, based on the difference between the amount of power generation and the amount of power consumption. Furthermore, the intra-site power surplus / deficiency calculation unit 311 calculates the amount of energy supply between sites based on the amount of power surplus / deficiency at each site. The calculation results of the intra-site power surplus / deficiency calculation unit 311 are stored in the storage unit 20 (see FIG. 1) in association with the identification information of the site.

[0047] FIG. 5 is a functional block diagram of the power generation fuel production transportation amount calculation unit 313. As shown in Figure 5, the power generation fuel production and transportation amount calculation unit 313 includes an inter-base route calculation unit 313a, a power generation fuel production amount calculation unit 313b, a power generation fuel transportation amount calculation unit 313c, a transportation fuel consumption amount calculation unit 313d, and a power generation fuel storage amount calculation unit 313e.

[0048] The base-to-base route calculation unit 313a calculates the transport route and transport time of the power generation fuel based on location information of the base from which the power generation fuel is transported and location information of the base to which the power generation fuel is transported. The location information of each base from which and to which the power generation fuel is transported is included in the geographic information of each base (see Figure 1) described above. Furthermore, the point from which the power generation fuel is transported to which base is set based on the amount of power generation fuel produced at each base in each time period, the amount of power generation that is insufficient, and the geographical positional relationship of each base. Furthermore, the transport time is calculated based on the transport route of the power generation fuel and road traffic information.

[0049] The power generation fuel production amount calculation unit 313b calculates the production amount of power generation fuel in each time period when a predetermined amount of electricity is supplied to a fuel production device at a predetermined base (for example, hydrogen production device 63 at base A: see Figure 1). The power generation fuel transport amount calculation unit 313c calculates the transport amount when transporting the above-mentioned power generation fuel production amount from a predetermined base to another base. For example, the power generation fuel transport amount calculation unit 313c calculates the transport amount when hydrogen is transported from base A to base B in Figure 1.

[0050] The transportation fuel consumption calculation unit 313d calculates the consumption of transportation fuel used to transport the power generation fuel. Examples of such fuel include gasoline, diesel fuel, and natural gas. The transportation fuel consumption calculation unit 313d calculates the consumption of transportation fuel (for example, the consumption amount in the hydrogen transport vehicle V1 in FIG. 1) based on the transportation amount of the power generation fuel and the transportation route.

[0051] The power generation fuel storage amount calculation unit 313e calculates the power generation fuel storage amount for each time period at each base based on the power generation fuel transport amount described above, as well as the power generation fuel production and consumption amounts. For example, the power generation fuel storage amount calculation unit 313e subtracts the power generation fuel transport amount (a positive value if the base is the transport source, and a negative value if the base is the transport destination) from the predicted value of the power generation fuel storage amount at a predetermined time, subtracts the power generation fuel consumption amount, and further adds the power generation fuel production amount to calculate the power generation fuel storage amount after the predetermined time has passed. In this way, the power generation fuel storage amount calculation unit 313e predicts the power generation fuel storage amount for each predetermined time period (e.g., every hour). Data such as the consumption of transport fuel and the transport and storage amounts of power generation fuel for each time period at each base is stored in the memory unit 20 (see FIG. 1).

[0052] FIG. 6 is an explanatory diagram showing a comparison of the breakdown of energy supply, annual carbon dioxide emissions, and annual costs for a plurality of plans. In the example of Figure 6, five plans α, β, γ, δ, and ε are shown side by side, which have different ratios of the annual amount of electricity transmitted by self-transportation to the annual amount of electricity generated by power generation fuel when energy is supplied from point A (see Figure 1) to point B (see Figure 1).

[0053] The data for these plans α, β, γ, δ, and ε are generated by the energy supply evaluation device 1 (see FIG. 1). The ratio between the amount of power transmitted by self-consignment and the amount of power generated by fuel for power generation may be set by default, or may be set by the user through operation of the input device 2 (see FIG. 1).

[0054] In Plan α, all energy supply from base A (see Figure 1) to base B (see Figure 1) is carried out by self-dispatch of electricity. Furthermore, in the order of Plans β, γ, δ, and ε, the proportion of transmitted electricity by self-dispatch decreases, while the proportion of generated electricity from fuel for power generation increases. In Plan ε, all energy supply from base A (see Figure 1) to base B (see Figure 1) is carried out by producing and transporting fuel for power generation. As shown in Figure 6, the annual carbon dioxide emissions associated with energy supply between bases differ for each plan, and the annual costs also differ for each plan.

[0055] The energy supply evaluation device 1 selects, for example, a plan (plan γ in the example of FIG. 6) that minimizes the annual carbon dioxide emissions and that reduces the annual cost to a predetermined threshold Q1 or less based on the reduction request amount of the user (business operator). Note that a plan (plan α in the example of FIG. 6) that minimizes the annual cost and that reduces the annual cost to a predetermined threshold C1 or less based on the reduction request amount of the user may also be selected. Alternatively, a plan may be selected based on another predetermined policy. The policy for selecting a plan is appropriately set by the user's operation via the input device 2 (see FIG. 1).

[0056] A screen such as that shown in Fig. 6 may be displayed on the display device 3 (see Fig. 1). In this case, when surplus energy at a base where a power generation facility and a load facility are installed is supplied to another base, the processing unit 30 (see Fig. 1) performs processing to display on the display device 3 (see Fig. 1) one or more of a plurality of plans including a plan α for supplying energy by power transmission and another plan ε for supplying energy by producing and transporting fuel for power generation, in association with the carbon dioxide emissions and costs associated with the supply of energy.

[0057] In the example of Figure 6, a pie chart showing the ratio of the annual amount of power transmitted by self-consignment to the annual amount of power generated by power generation fuel is displayed side by side in association with each plan. Also, a bar graph showing the annual carbon dioxide emissions and costs is displayed side by side in association with each plan. This makes it easier for the user to compare the carbon dioxide emissions and costs of each plan. Note that a predetermined plan may be selected from multiple plans α, β, γ, δ, and ε by operating the input device 2 (see Figure 1).

[0058] Furthermore, when energy is supplied between multiple bases, there may be a business operator that operates the power generation equipment and the load equipment at a specific base, and another business operator that operates the power generation equipment and the load equipment at another base. In such a case, the processing unit 30 (see FIG. 1) calculates the carbon dioxide emissions and costs for each business operator and displays them on the display device 3 (see FIG. 1) for each business operator. This allows the user to understand the carbon dioxide emissions and costs for each business operator.

[0059] FIG. 7 is a flowchart of the processing executed by the processing unit (see also FIG. 3 as appropriate). 7 is started by a user's operation via the input device 2. For example, the results of the processing in FIG. 7 are used when a business plan for a company is drawn up or an operation plan for each base is created. Alternatively, the processing in FIG. 7 may be started based on an operation of the input device 2 by an aggregator.

[0060] In step S101, the processing unit 30 reads input data. As shown in Fig. 3, this input data includes the carbon dioxide emission and cost reduction requests for each base station, geographic information for each base station, equipment specifications for each base station, local fuel prices, equipment installation costs, and equipment maintenance costs. The equipment specifications for each base station include data indicating the specifications of multiple pieces of equipment, such as renewable energy power generation equipment, load equipment for factories, hydrogen production equipment, and hydrogen co-fuel generators.

[0061] Next, in step S102, the processing unit 30 generates a plurality of plans for energy supply between bases. That is, the processing unit 30 generates a plurality of plans such as plans α, β, γ, δ, and ε in Fig. 6 based on the input data read in step S101 and a predetermined program. For example, the processing unit 30 may predict the amount of power generation fuel stored at each base in each time period, and if there is a base where the amount of power generation fuel stored is below a specified amount, a plan may be generated to supply power generation fuel to that base from another base.

[0062] Next, in step S103, the processing unit 30 selects one plan from among the multiple plans. For example, the processing unit 30 selects the first plan α from among five plans α, β, γ, δ, and ε (see FIG. 6). In step S104, the processing unit 30 executes a decarbonization evaluation calculation for energy supply. That is, when surplus energy at a predetermined base is supplied to another base, the processing unit 30 calculates the carbon dioxide emissions and costs associated with the supply of energy for a plurality of plans including the supply of energy by power transmission and the supply of energy by the production and transportation of fuel for power generation.

[0063] In step S105, the processing unit 30 causes the display device 3 to display the calculation result of step S104. In step S106, the processing unit 30 determines whether the carbon dioxide emissions associated with the energy supply between bases satisfy a predetermined reduction request amount. For example, the reduction request amount is set in the form of a percentage reduction of the carbon dioxide emissions of a base based on the carbon dioxide emissions from the year before last. If the carbon dioxide emissions satisfy the predetermined reduction request amount in step S106 (S106: Yes), the processing unit 30 proceeds to step S107.

[0064] In step S107, the processing unit 30 determines whether the cost of energy supply between bases satisfies a predetermined requested reduction amount. For example, the requested reduction amount is set in the form of a percentage reduction in the cost required for a base based on the cost at that base from the year before last. If the cost satisfies the predetermined requested reduction amount in step S107 (S107: Yes), the processing unit 30 proceeds to step S108.

[0065] In step S108, the processing unit 30 turns on the request satisfaction flag for that plan. Here, the request satisfaction flag is a flag that is switched on when the carbon dioxide emission amount and cost satisfy a predetermined reduction request amount. The request satisfaction flag is stored in the storage unit 20 in association with the identification information of the plan selected in step S103. Then, the processing of the processing unit 30 proceeds to step S110, which will be described later.

[0066] Furthermore, in step S106, if the carbon dioxide emissions associated with the energy supply between bases do not satisfy the predetermined reduction request amount (S106: No), the processing unit 30 proceeds to step S109. Also, in step S107, if the costs associated with the energy supply between bases do not satisfy the predetermined reduction request amount (S107: No), the processing unit 30 proceeds to step S109.

[0067] In step S109, the processing unit 30 turns off the request satisfaction flag, and the processing of the processing unit 30 then proceeds to step S110. In step S110, the processing unit 30 determines whether or not calculations of carbon dioxide emissions, costs, etc. have been performed for all plans. That is, the processing unit 30 determines whether or not the processes of steps S103 to S109 have been performed for all of the multiple plans generated in step S102.

[0068] If there is an uncalculated plan in step S110 (S110: No), the processing of the processing unit 30 returns to step S103. Then, the processing unit 30 selects another plan and performs the processes of steps S103 to S109 for that plan. Also, if the carbon dioxide emissions and costs have been calculated for all plans in step S110, the processing unit 30 ends the series of processes (END).

[0069] 7, the case has been described in which the calculation results are displayed (S105) each time the decarbonization evaluation calculation (S104) for each plan is performed, regardless of whether the carbon dioxide emissions or costs satisfy the predetermined reduction requirements. However, this is not limiting. That is, the processing unit 30 may display on the display device 3, among a plurality of plans, those for which the carbon dioxide emissions associated with the supply of energy between bases satisfy the predetermined reduction requirements and the costs associated with the supply of energy satisfy the predetermined reduction requirements. This saves the user the trouble of checking plans for which the carbon dioxide emissions or costs do not satisfy the reduction requirements, thereby reducing the burden on the user.

[0070] FIG. 8 is a flowchart relating to the decarbonization evaluation calculation. The series of processes in FIG. 8 corresponds to the process in step S104 (see FIG. 7) described above. In step S104a, the processing unit 30 calculates the amount of generated power and the amount of consumed power using the intra-site power surplus / deficiency calculation unit 311. That is, the processing unit 30 predicts the amount of generated power and the amount of consumed power in each time period of each site.

[0071] In step S104b, the processing unit 30 calculates the amount of power surplus or shortage using the intra-site power surplus or shortage calculation unit 311. That is, the processing unit 30 calculates the amount of power surplus or shortage by subtracting the amount of power generated from the amount of power consumed in each time period at each site. Note that if the site has a power generation shortage, the amount of power surplus or shortage will be a positive value. Conversely, if the site has a surplus of power generated, the amount of power surplus or shortage will be a negative value.

[0072] In step S104c, the processing unit 30 calculates the amount of power supply using the base-to-base power supply amount calculation unit 312. That is, the processing unit 30 calculates the amount of power supply from the base where surplus power occurs to the base where power is insufficient, based on the amount of power surplus or shortage calculated in step S104b.

[0073] In step S104d, the processing unit 30 calculates the production amount of the power generation fuel and calculates the transport amount of the power generation fuel using the power generation fuel production transport amount calculation unit 313. That is, the processing unit 30 calculates the production amount of the power generation fuel at the base where surplus electricity is produced, and calculates the transport amount of the power generation fuel to the base where electricity is insufficient.

[0074] In step S104e, the processing unit 30 calculates the amount of power generation fuel stored at a specified base station for each time period using the power generation fuel production and transportation amount calculation unit 313, and also calculates the amount of power generation fuel consumed for each time period (for example, the amount of hydrogen consumed in a hydrogen-blended generator).

[0075] In step S104f, the processing unit 30 calculates the transportation route of the power generation fuel using the power generation fuel production transportation amount calculation unit 313. That is, the processing unit 30 calculates the transportation route of the power generation fuel based on the location information of the base from which the power generation fuel is transported and the location information of the base to which the power generation fuel is transported. In addition, although omitted in Fig. 8, the processing unit 30 also calculates the transportation time based on the transportation route of the power generation fuel.

[0076] In step S104g, the processing unit 30 calculates the consumption of transportation fuel using the power generation fuel production transportation amount calculation unit 313. That is, the processing unit 30 calculates the consumption of transportation fuel (e.g., gasoline) when transporting the power generation fuel from one base to another base, based on the transportation amount of the power generation fuel calculated in step S104d and the transportation route calculated in step S102f.

[0077] In step S104h, the processing unit 30 calculates the carbon dioxide emission amount and cost using the emission calculation unit 32. That is, the processing unit 30 calculates the carbon dioxide emission amount and cost associated with energy supply between bases in the plan selected in step S103 (see FIG. 7). After performing the processing of step S104h, the processing unit 30 ends the series of processes related to step S104 (see FIG. 7) (END).

[0078] FIG. 9 shows an example of a display screen related to energy supply between bases. On the left side of the display screen shown in Figure 9, the locations of hydrogen (H2) production bases and other hydrogen consumption bases are shown on a map. The transportation route for transporting hydrogen based on a predetermined plan is also shown in bold on the map. Figure 9 shows an example in which hydrogen produced at a predetermined base is transported to three bases by hydrogen transport vehicle.

[0079] For bases where hydrogen is produced, the amount of hydrogen produced (H2 production amount in Figure 9) as well as the amount of carbon dioxide emissions (CO2 emissions) and power consumption (power consumption) associated with hydrogen production are displayed vertically within a frame. For bases where hydrogen is consumed, the amount of hydrogen consumed (H2 consumption amount in Figure 9) as well as the amount of carbon dioxide emissions (CO2 emissions) and power consumption (power consumption) associated with hydrogen consumption are displayed vertically within a frame. For hydrogen transportation routes, the amount of carbon dioxide emissions associated with hydrogen transportation (CO2 in Figure 9) and the remaining battery charge of battery-powered hydrogen transport vehicles at the end of transportation are displayed vertically within a frame.

[0080] The processing unit 30 (see FIG. 1) may calculate the amount of carbon dioxide emissions during transportation associated with the transportation of the power generation fuel based on the transportation route of the power generation fuel (e.g., hydrogen) and the type of transportation fuel (e.g., gasoline) used to transport the power generation fuel. In this case, the processing unit 30 includes the amount of carbon dioxide emissions during transportation in the amount of carbon dioxide emissions associated with the supply of energy between bases. For example, the amount of carbon dioxide emissions at the base of the supplier (or destination) of the power generation fuel may include the amount of carbon dioxide emissions during transportation. This allows the actual amount of carbon dioxide emissions for each plan to be accurately calculated, allowing the user to properly understand which plan will result in the lowest carbon dioxide emissions.

[0081] On the right side of the display screen in Figure 9, "Settings," "Constraints," and "Results" are displayed vertically. In the "Settings" column, whether to apply internal carbon pricing (on) or not (off) is selected via input device 2 (see Figure 1). Internal carbon pricing is a unique pricing system set within a company for carbon dioxide emissions, and is used appropriately for investment decisions, etc.

[0082] In the "Constraints" field, an appropriate option can be selected from three options included in a pull-down menu by operating the input device 2 (see FIG. 1). The first option is to limit the cost associated with energy supply between bases to a predetermined value or less, and to minimize carbon dioxide emissions (CO2 amount). The second option is to limit the carbon dioxide emissions (CO2 amount) to a predetermined value or less, and to minimize the cost. The third option is to convert the carbon dioxide emissions (CO2 amount) into costs and minimize the total cost (cost including costs for self-consignment, etc.).

[0083] The "Results" column displays the total carbon dioxide emissions (CO2 emissions) and total annual costs associated with the energy supply between a business's locations, side-by-side, allowing users to understand the carbon dioxide emissions and total costs associated with a given plan.

[0084] When the processing unit 30 (see FIG. 1) generates a plan for transporting power generation fuel between base stations as one of the multiple plans, the amount of transportation fuel consumed in transporting the power generation fuel may be calculated based on the transportation route of the power generation fuel between the base stations and the transportation amount of the power generation fuel. In this case, the processing unit 30 displays the amount of transportation fuel consumed on the display device 3 (see FIG. 1) in association with the transportation route. This allows the user to easily understand the amount of transportation fuel consumed on each transportation route.

[0085] <Effects> According to this embodiment, when generating a plan for supplying surplus energy from a specific base to another base, the processing unit 30 calculates carbon dioxide emissions and costs. This allows the user to specifically understand the environmental impact and costs of supplying energy between bases. Furthermore, business entities can efficiently use surplus power generated by solar power generation and the like, while reducing carbon dioxide emissions and costs.

[0086] In this embodiment, the carbon dioxide emissions and costs are calculated taking into account the procurement, production, transportation, and consumption of fuel for power generation, allowing the user to grasp the actual accurate values ​​of carbon dioxide emissions and costs. Furthermore, even if self-consignment is temporarily unavailable due to a request from a general electric utility to control output, or if the timing of peak power demand and power generation is out of sync, surplus power generated by solar panels can be used to produce fuel for power generation. This allows for the reduction of carbon dioxide emissions at each site and the effective use of power generated by solar panels.

[0087] In addition, in this embodiment, carbon dioxide emissions and costs are used as evaluation indicators for plans to supply energy between bases, which provides a platform for promoting decarbonization through collaboration among multiple business entities in a given area.

[0088] <<Variations>> The energy supply evaluation system P1 and the energy supply evaluation method according to the present disclosure have been described above in the embodiments, but the present disclosure is not limited to these descriptions and various modifications can be made. For example, in the embodiment, an example is shown in which it is determined whether or not a predetermined reduction request amount is satisfied for each of the carbon dioxide emission amount and the cost associated with the energy supply between bases, but this is not limiting. That is, a process such as that shown in the flowchart of FIG. 10 may be performed.

[0089] FIG. 10 is a flowchart of processing executed by a processing unit of an energy supply evaluation system according to a modified example (see also FIG. 1 as appropriate). 10 are the same as steps S101 to S105 (see FIG. 7) in the embodiment, and therefore will not be described again. After displaying the result of the decarbonization evaluation calculation in step S205, the processing of the processing unit 30 proceeds to step S206.

[0090] In step S206, the processing unit 30 converts the carbon dioxide emissions (CO2 emissions) into costs. For example, the processing unit 30 converts the carbon dioxide emissions associated with energy supply between bases into costs based on the internal carbon pricing described above. In this way, by converting the carbon dioxide emissions into costs, it is possible to unify the evaluation index (i.e., costs) when determining the suitability of multiple plans.

[0091] In step S207, the processing unit 30 adds up the cost based on the decarbonization evaluation calculation in step S204 and the result of the cost conversion in step S206. As described above, the cost based on the decarbonization evaluation calculation includes the cost of introducing the equipment and the cost of maintenance.

[0092] In step S208, the processing unit 30 determines whether the cost resulting from the summation in step S207 is equal to or less than a predetermined requested cost. The value of the predetermined requested cost is input by the user through the input device 2. If the cost resulting from the summation in step S208 is equal to or less than the predetermined requested cost (S208: Yes), the processing unit 30 proceeds to step S209. In step S209, the processing unit 30 sets the request satisfaction flag to ON.

[0093] Furthermore, if the total cost is higher than the predetermined requested cost in step S208 (S208: No), the processing unit 30 proceeds to step S210. In step S210, the processing unit 30 turns off the request satisfaction flag. After performing the processing in step S209 or step S210, the processing unit 30 proceeds to step S211. Note that the processing in step S211 is the same as step S110 in the embodiment (see FIG. 7), and therefore description thereof will be omitted.

[0094] The processing unit 30 may convert the carbon dioxide emissions into costs, and the plan that minimizes the total value of the cost conversion result and the cost of supplying energy between base stations may be displayed on the display device 3. This allows the user to see at a glance the plan that minimizes the total cost when the carbon dioxide emissions are converted into costs.

[0095] Furthermore, the processing unit 30 may calculate the carbon dioxide emissions and costs for each of a plurality of base stations, and when a predetermined base station is selected by the user through the input device 2, the carbon dioxide emissions and costs corresponding to that base station may be displayed on the display device 3. This allows pinpoint display of information about the base station selected by the user, thereby improving the convenience for the user when checking the evaluation results regarding energy supply.

[0096] Furthermore, when the processing unit 30 generates a plan for transmitting power between base stations (for example, self-consignment) as one of the multiple plans, if the transmitted power exceeds the transmission capacity of the power transmission network and the power distribution network between the base stations, it is preferable to modify the plan so that the amount obtained by subtracting the transmission capacity from the original transmitted power is used to produce fuel for power generation. This prevents the transmitted power from exceeding the predetermined transmission capacity. Furthermore, by reducing the transmitted power, the surplus power can be effectively used to produce fuel for power generation.

[0097] Furthermore, when a general electric utility requests output control, the processing unit 30 may change the plan in progress to perform control to reduce the energy transmitted. This allows appropriate response to requests for output control when a line break occurs due to a disaster, when the transmitted power is about to exceed the transmission capacity, or when the power consumption in the area including the base does not reach the supplied power.

[0098] Furthermore, when a specific plan is selected from among multiple plans, the processing unit 30 may transmit instructions corresponding to the selected plan to controllers at multiple bases, thereby allowing the ultimately selected plan to be appropriately executed at each base.

[0099] It should be noted that the finally selected plan does not necessarily need to be executed, and may be used for simulation. In this case, dummy values ​​for various parameters including the output control rate may be input via the input device 2. It is also possible for the user to operate the input device 2 to appropriately change the equipment specifications of each base, and to perform a simulation based on the changed equipment specifications.

[0100] In the embodiment, the input data includes requested reduction amounts of carbon dioxide emissions and costs, but this is not limiting. That is, the input data may not specifically include requested reduction amounts of carbon dioxide emissions and costs. Even in this case, the processing unit 30 can select a plan with low carbon dioxide emissions and low costs based on the results of the decarbonization cost calculation (step S104 in FIG. 7).

[0101] In addition, although the embodiment has been described with reference to a case where hydrogen is used as the power generation fuel, the present invention is not limited to this. For example, ammonia or biomass fuel can also be used as the power generation fuel in addition to synthetic fuels such as synthetic methane.

[0102] Furthermore, when the processing unit 30 performs the decarbonization evaluation calculation (step S104 in FIG. 7), the amount of carbon dioxide emissions may be included in the amount of carbon dioxide emissions during the manufacture of equipment used to supply energy between bases. Specifically, the processing unit 30 includes the amount of carbon dioxide emitted in the manufacturing process of equipment such as solar power generation panels, hydrogen production equipment, and hydrogen-blended combustion generators in the amount of carbon dioxide emissions. Furthermore, when performing the decarbonization evaluation calculation, whether or not to include the amount of carbon dioxide emissions during the manufacture of the carbon dioxide emissions may be switched by operating the input device 2. This increases the degree of freedom when the user makes settings.

[0103] In addition, in the embodiment, the case where the hydrogen tank T1 (see FIG. 1) is transported by the hydrogen transport vehicle V1 (see FIG. 1) has been described, but this is not limited to this. That is, a ship or an aircraft may also be used to transport the power generation fuel. In this case, the breakdown of the costs required to transport the power generation fuel may be displayed separately for the vehicle, ship, and aircraft.

[0104] Furthermore, the processing unit 30 may display the amount of fuel stored for power generation in each time period for each of a plurality of base stations in a time series manner using a bar graph or the like, which makes it easier for the user to grasp the transition in the amount of fuel stored for power generation when a predetermined plan is selected. In addition, the plan for supplying energy between bases may be changed as appropriate depending on the date or time period. For example, energy may be supplied between bases A and B on weekdays based on plan α (see FIG. 6), and energy may be supplied between bases A and B on holidays based on plan β (see FIG. 6).

[0105] Furthermore, the processing (energy supply evaluation method) executed by the energy supply evaluation system P1 may be executed as a predetermined program on a computer. The program may be provided via a communication line, or may be written to a recording medium such as a CD-ROM and distributed.

[0106] Furthermore, the present disclosure is not limited to the embodiments and includes various modifications. For example, the embodiments have been described in detail to clearly explain the present disclosure, and the present disclosure is not necessarily limited to those including all of the described configurations. Furthermore, it is possible to add, delete, or replace part of the configuration of the embodiments with other configurations.

[0107] Furthermore, the above-mentioned configurations, functions, processing units, processing means, etc. may be partly or entirely implemented in hardware, for example, by designing them as integrated circuits. Furthermore, the above-mentioned configurations, functions, etc. may be implemented in software, with a processor interpreting and executing a program that implements each function. Information such as the programs, tables, and files that implement each function can be stored in a memory, a recording device such as a hard disk or SSD (Solid State Drive), or a recording medium such as an IC card, SD card, or DVD.

[0108] In addition, the control lines and information lines shown are those that are considered necessary for the explanation, and do not necessarily show all the control lines and information lines in the product. In reality, it can be assumed that almost all components are interconnected. [Explanation of symbols]

[0109] 1. Energy supply evaluation device 2 Input devices 3 Display device 10. Communications Department 20 Memory section 30 Processing section 31 Supply method selection section 32 Emissions Calculation Department 33 Supply method determination section 34 Display data generation unit 61,71 Solar power generation panels (power generation equipment) 62,72 Factory (load equipment) 63 Hydrogen production equipment 64,74 controller 73 Hydrogen mixed combustion generator 311 Base Power Surplus / Shortage Calculation Unit 312 Inter-base power supply calculation unit 313 Power Generation Fuel Production and Transportation Calculation Department 314 Plan Selection Section 315 Power Supply Allocation Ratio Calculation Unit 316 Inter-base power transmission instruction unit 317 Power Generation Fuel Transportation Instruction Department 318 Power Generation Fuel Production Instruction Department A, B bases E1 Power system N1 Network P1 Energy Supply Evaluation System

Claims

1. An energy supply evaluation system including a processing unit that, when supplying surplus energy based on the difference between the amount of power generated and the amount of power consumed at a base where power generation equipment and load equipment are installed to another base, displays on a display device one or more of a plurality of plans, including a plan to supply the energy by power transmission and another plan to supply the energy by producing and transporting fuel for power generation, in association with the carbon dioxide emissions and costs associated with the supply of the energy.

2. When the energy is supplied between a plurality of bases, there exists a business operator who operates the power generation equipment and the load equipment at a predetermined base, and another business operator who operates the power generation equipment and the load equipment at another base, The processing unit calculates the carbon dioxide emission amount and the cost for each of the businesses and displays them on the display device for each of the businesses. The energy supply evaluation system according to claim 1 ,

3. The processing unit displays, on the display device, one of the plurality of plans in which the carbon dioxide emission amount associated with the supply of the energy satisfies a predetermined reduction request amount and the cost associated with the supply of the energy satisfies a predetermined reduction request amount. The energy supply evaluation system according to claim 1 ,

4. The processing unit calculates the amount of generated power based on specification information and weather information of the power generation equipment, calculates the amount of consumed power based on specification information of the load equipment, calculates an amount of power surplus or shortage, which is surplus or shortage of energy at each of the bases, based on the difference between the amount of generated power and the amount of consumed power, and calculates the amount of energy supply between the bases based on the amount of power surplus or shortage at each of the bases. The energy supply evaluation system according to claim 1 ,

5. The processing unit predicts the storage amount of the power generation fuel for each time period at each of the bases, and if there is a base where the storage amount of the power generation fuel is below a specified amount, generates a plan to supply the power generation fuel to that base from another base. The energy supply evaluation system according to claim 1 ,

6. When generating a plan for transporting the power generation fuel between the bases as one of the plurality of plans, the processing unit calculates the consumption of transportation fuel associated with the transportation of the power generation fuel based on the transportation route of the power generation fuel between the bases and the transportation amount of the power generation fuel, and displays the consumption of transportation fuel on the display device in association with the transportation route. The energy supply evaluation system according to claim 1 ,

7. When generating a plan for transmitting power between the bases as one of the plurality of plans, the processing unit sets an allocation ratio of the amount of power based on the magnitude of a power shortage at each base. The energy supply evaluation system according to claim 1 ,

8. The processing unit calculates the cost associated with the supply of the energy based on an introduction cost of equipment including the power generation equipment, a maintenance cost of the equipment, a transportation cost of the power generation fuel, and a cost of power consumption associated with the supply of the energy between the bases. The energy supply evaluation system according to claim 1 ,

9. When generating a plan for transporting the power generation fuel between the bases as one of the plurality of plans, the processing unit calculates the amount of carbon dioxide emissions during transportation associated with the transportation of the power generation fuel based on the transportation route of the power generation fuel between the bases and the type of transportation fuel used to transport the power generation fuel, and includes the amount of carbon dioxide emissions during transportation in the amount of carbon dioxide emissions associated with the supply of energy. The energy supply evaluation system according to claim 1 ,

10. The processing unit calculates the carbon dioxide emission amount and the cost for each of the plurality of bases, and when a predetermined base is selected by a user through an input device, displays the carbon dioxide emission amount and the cost corresponding to the base on the display device. The energy supply evaluation system according to claim 1 ,

11. The processing unit converts the amount of carbon dioxide emissions into a cost, and displays on the display device a plan that minimizes the total value of the cost and the result of the cost conversion. The energy supply evaluation system according to claim 1 ,

12. When the processing unit generates a plan for transmitting power between the bases as one of the plurality of plans, and the transmitted power exceeds the transmission capacity of the power transmission network and the power distribution network between the bases, the processing unit modifies the plan so that the amount obtained by subtracting the transmission capacity from the original transmitted power is used for producing the fuel for power generation. The energy supply evaluation system according to claim 1 ,

13. The processing unit, when requested by a general electric utility to control output, changes the plan being executed and performs control to reduce the energy by power transmission. The energy supply evaluation system according to claim 1 ,

14. When a predetermined plan is selected from the plurality of plans, the processing unit transmits instructions corresponding to the selected plan to controllers of the plurality of bases. The energy supply evaluation system according to claim 1 ,

15. An energy supply evaluation method that includes, when supplying surplus energy based on the difference between the amount of power generated and the amount of power consumed at a base where power generation equipment and load equipment are installed to another base, a process of displaying on a display device one or more of a plurality of plans, including a plan to supply the energy by power transmission and another plan to supply the energy by producing and transporting fuel for power generation, in association with the carbon dioxide emissions and costs associated with the supply of the energy.

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