Presentation system, presentation method, and program

Abstract

Provided are a presentation system, a presentation method, and a program that enable more appropriate selection of an energy plan and an environmental value plan. A presentation system (3) is provided with a first calculating circuit (35) capable of accessing energy information (D1) including information relating to the price history of a plurality of energy plans, environmental value information (D2) including information relating to the price history of a plurality of environmental value plans, and demand information (D3) including an energy demand amount and an environmental target. The first calculating circuit (35) presents, on the basis of the energy information (D1) and the environmental value information (D2), a plurality of combined plans of an energy plan and an environmental value plan that satisfy the energy demand amount and the environmental target, and an index value of the risk of price fluctuation for each of the plurality of combined plans.

Description

Presentation system, presentation method, and program

[0001] The present disclosure relates to a presentation system, a presentation method, and a program.

[0002] Patent Literature 1 discloses an electricity trading intermediary device that includes an environmental value information storage unit, a provided electricity information storage unit, an information output unit that outputs information to prospective purchasers, an information reception unit that receives demand information from prospective purchasers, including environmental value conditions that must be satisfied by non-fossil fuel certificates that the prospective purchasers wish to provide and power conditions that must be satisfied by the provided electricity that the prospective purchasers wish to provide, and an extraction unit that extracts, from the information stored in the environmental value information storage unit and the provided electricity information storage unit, combinations of information on non-fossil fuel certificates that satisfy both the environmental value conditions and the power conditions, included in the demand information received from the prospective purchasers, and information on the provided electricity.

[0003] Japanese Patent Application Laid-Open No. 2022-18463

[0004] Patent Document 1 extracts a combination of information about non-fossil fuel certificates (environmental value plans) that satisfy environmental value conditions and power conditions, contained in demand information received from a prospective purchaser, and information about the provided power (energy plans). Generally, the amount of power generated by renewable energy sources fluctuates depending on weather and other conditions, and fluctuations in power generation also cause fluctuations in the amount of energy supplied and the price. Therefore, if a prospective purchaser purchases additional power beyond what was anticipated, they may be forced to purchase additional environmental value to satisfy the environmental value conditions, resulting in significant costs. Therefore, when selecting an energy plan and an environmental value plan, prospective purchasers may wish to keep the price within their desired range.

[0005] The present disclosure provides a presentation system, a presentation method, and a program that enable more appropriate selection of energy plans and environmental value plans.

[0006] A presentation system according to one aspect of the present disclosure includes a calculation circuit that can access energy information including information on the price history of a plurality of energy plans, environmental value information including information on the price history of a plurality of environmental value plans, and demand information including energy demand and an environmental target. The calculation circuit presents a plurality of combination plans of energy plans and environmental value plans that satisfy the energy demand and the environmental target, and an index value of the price fluctuation risk for each of the plurality of combination plans, based on the energy information and the environmental value information.

[0007] A presentation method according to one aspect of the present disclosure is executed by a calculation circuit that can access energy information including information on the price history of multiple energy plans, environmental value information including information on the price history of multiple environmental value plans, and demand information including energy demand and environmental targets, and presents multiple combination plans of energy plans and environmental value plans that satisfy the energy demand and environmental targets, and index values ​​for price fluctuations for each of the multiple combination plans, based on the energy information and the environmental value information.

[0008] A program according to one aspect of the present disclosure is a program for causing an arithmetic circuit to execute the above-described presentation method.

[0009] Aspects of the present disclosure enable better selection of energy plans and environmental value plans.

[0010] Schematic diagram of a recommendation system according to one embodiment. Block diagram of a presentation system according to the embodiment. Block diagram of an information terminal of the recommendation system according to the embodiment. Flowchart of a part of the operation of the presentation system according to the embodiment. Flowchart of a part of the operation of the presentation system according to the embodiment. Flowchart of a part of the operation of the presentation system according to the embodiment. Schematic diagram of a part of an input screen according to ... an example of an output screen according to the presentation system according to the embodiment. Sequence diagram of a first example of the operation of the recommendation system according to the embodiment. Sequence diagram of a second example of the operation of the recommendation system according to the embodiment.

[0011] [1. Embodiments] Hereinafter, embodiments of the present disclosure will be described, with reference to the drawings where appropriate. However, the following embodiments are merely examples for explaining the present disclosure, and are not intended to limit the present disclosure to the following content (e.g., the shape, dimensions, and arrangement of each component). Positional relationships, such as up, down, left, and right, are based on the positional relationships shown in the drawings unless otherwise specified. Each figure described in the following embodiments is a schematic diagram, and the ratios of the size and thickness of each component in each figure do not necessarily reflect the actual dimensional ratios. Furthermore, the dimensional ratios of each element are not limited to the ratios shown in the drawings.

[0012] In the following description, when it is necessary to distinguish between multiple components, prefixes such as "first" and "second" are added to the names of the components. However, when the components can be distinguished from each other by the symbols attached to them, the prefixes such as "first" and "second" may be omitted in consideration of readability of the text.

[0013] In the following description, when it is necessary to distinguish between multiple components, suffixes such as "-1" and "-2" are added to the symbols of the components. However, when it is not necessary to distinguish between multiple components, the suffixes "-1" and "-2" may be omitted to improve readability.

[0014] 1 is a schematic diagram of a recommendation system 1 according to this embodiment. The recommendation system 1 is used to extract and present a combination plan of an energy plan and an environmental value plan that matches the environmental goal of a user 5 from a plurality of energy plans and a plurality of environmental value plans.

[0015] An energy plan specifies an agreement under which an energy provider provides energy. The energy plan includes the type of energy and the price of the energy. Examples of energy types include electricity, liquefied natural gas (LNG), and gasoline. The price of the energy is, for example, the amount per unit of energy. As an example, if the energy is electricity, the unit of the price of the energy is yen / kWh. Examples of energy providers include retail electricity suppliers.

[0016] The environmental value plan specifies the arrangement under which the environmental value provider provides the environmental value. The environmental value plan includes the type of environmental value and the price of the environmental value. The types of environmental value include J-Credit, Non-Fossil Certificate, and Green Power Certificate. The price of the environmental value is, for example, expressed as a unit of electricity or a unit of CO ２ The unit of J-Credit is yen / t-CO ２ The units of the non-fossil fuel certificate and the green power certificate are yen / kWh. Examples of environmental value providers include power generation companies.

[0017] A combined plan is defined as a combination of an energy plan and an environmental value plan. A combined plan includes at least one energy plan, but does not necessarily include an environmental value plan.

[0018] Environmental targets are set as efforts to combat climate change. For example, environmental targets are set based on Science Based Targets (SBT), an international initiative for disclosing and evaluating information on climate change countermeasures by global companies, Renewable Energy 100% (RE100), and Japanese laws, such as the Energy Conservation Act (Act on Rationalizing Energy Use and Switching to Non-Fossil Energy) and the Global Warming Countermeasures Act (Act on Promotion of Global Warming Countermeasures).

[0019] The recommendation system 1 includes an information source 2 , a presentation system 3 , and an information terminal 4 .

[0020] The information source 2 includes a measurement facility 21 , a power generation facility 22 , an energy provider server 23 , and an environmental value provider server 24 .

[0021] The metering equipment 21 measures the energy consumption of the facility of the user 5. The energy consumption is, for example, the amount of power consumed. The metering equipment 21 includes, for example, one or more power meters that measure the power consumption of the facility of the user 5.

[0022] The renewable energy facility 22 provides renewable energy to the facilities of the user 5. The renewable energy facility 22 is a facility that generates electricity from non-fossil energy sources, such as a solar power generation facility or a wind power generation facility.

[0023] The energy provider server 23 stores information about one or more energy plans that can be provided by the energy provider. The energy provider server 23 also stores information about the history of energy plan prices for a predetermined period. The prices of the energy plans may be updated, for example, every predetermined time. Although not particularly limited, the shorter the predetermined time, the better, and the longer the predetermined period, the better. As an example, the predetermined time is one hour, and the predetermined period is one year.

[0024] The environmental value provider server 24 stores information about one or more environmental value plans that can be offered by the environmental value provider. The environmental value provider server 24 also stores information about the price history of the environmental value plans for a predetermined period of time. The prices of the environmental value plans may be updated, for example, every predetermined time. Although not particularly limited, the shorter the predetermined time, the better, and the longer the predetermined period, the better. As an example, the predetermined time is one hour, and the predetermined period is one year.

[0025] In Figure 1, one energy provider server 23 and one environmental value provider server 24 are shown for the sake of simplicity, but the number of energy provider servers 23 and the number of environmental value provider servers 24 are not limited to one and may be two or more.

[0026] The presentation system 3 is used to present a combined plan of an energy plan and an environmental value plan that matches the needs of a user 5. The presentation system 3 is communicatively connected to an information source 2 via a communication network. Fig. 2 is a block diagram of the presentation system 3. The presentation system 3 includes a first input device 31, a first output device 32, a first communication device 33, a first storage device 34, and a first arithmetic circuit 35. The presentation system 3 can be realized by, for example, one or more servers.

[0027] The first input device 31 includes one or more human-machine interfaces for inputting information. Examples of the human-machine interface include a keyboard, a pointing device (such as a mouse or a trackball), a touchpad, a position input device for a touch panel display, and the like. The one or more human-machine interfaces of the first input device 31 may be built into the presentation system 3 or may be externally attached. In other words, the first input device 31 may include a human-machine interface of the presentation system 3 itself and a human-machine interface connected to the presentation system 3.

[0028] The first output device 32 includes one or more human-machine interfaces for outputting information. Examples of the human-machine interface include a display, a speaker, a touch panel display, and other output interfaces. The one or more human-machine interfaces of the first output device 32 may be built into the presentation system 3 or may be externally attached. That is, the first output device 32 may include a human-machine interface of the presentation system 3 itself and a human-machine interface connected to the presentation system 3.

[0029] The first communication device 33 is used for communication through a communication network. The communication network may include the Internet, and may be composed of not only a network conforming to a single communication protocol but also multiple networks conforming to different communication protocols. The communication protocol may be selected from various well-known wired and wireless communication standards. An example of a wired communication standard is a standard such as Ethernet (registered trademark). An example of a wireless communication standard is a standard such as IEEE 802.11. The communication network may include data communication equipment such as a repeater hub, a switching hub, a bridge, a gateway, and a router. The first communication device 33 has one or more communication interfaces. The first communication device 33 is connectable to the communication network and has the function of communicating through the communication network.

[0030] The first storage device 34 includes one or more storages (non-transitory storage media). The storages may be, for example, hard disk drives, optical drives, or solid-state drives (SSDs). The storages may be internal, external, or network-attached storage (NAS).

[0031] The information stored in the first storage device 34 includes energy information D1, environmental value information D2, demand information D3, and recommendation information D4. The energy information D1, environmental value information D2, demand information D3, and recommendation information D4 do not need to be stored in the first storage device 34 at all times, but only need to be stored in the first storage device 34 when needed by the first arithmetic circuit 35.

[0032] The first arithmetic circuit 35 is connected to the first input device 31, the first output device 32, and the first communication device 33, and is capable of accessing the first storage device 34. The first arithmetic circuit 35 may be realized, for example, by a computer system. The computer system includes one or more processors (microprocessors) and one or more memories. The one or more processors execute programs (stored in one or more memories or the first storage device 34) to realize various functions of the presentation system 3. The programs may be pre-recorded in the first storage device 34, or may be provided via a telecommunications line such as the Internet, or recorded on a non-transitory recording medium such as a memory card.

[0033] The first calculation circuit 35 is configured to obtain the energy information D1 and store it in the first storage device 34 .

[0034] The energy information D1 includes information regarding the price history of multiple energy plans. The multiple energy plans may be offered by multiple different energy providers, rather than by a single energy provider. In this embodiment, the multiple energy plans include fixed-price energy plans in which the energy price is constant and variable-price energy plans in which the energy price fluctuates. The multiple energy plans include multiple fixed energy plans and multiple variable energy plans. The fixed energy plans are energy plans in which the energy supply amount is constant. The fixed energy plans use non-renewable energy sources such as thermal power generation and nuclear power generation, so the energy supply amount can be maintained constant. The variable energy plans are energy plans in which the energy supply amount fluctuates to use renewable energy. By adopting a variable energy plan, the proportion of non-fossil fuel energy sources can be increased. The multiple energy plans are classified into fixed-price energy plans or variable-price energy plans in terms of price, and into fixed energy plans or variable energy plans in terms of supply amount.

[0035] For example, the first calculation circuit 35 obtains the energy information D1 by accessing the energy provider server 23 through the first communication device 33 and collecting information on the price history of the energy plan.

[0036] The first arithmetic circuit 35 is configured to acquire the environmental value information D2 and store it in the first storage device 34.

[0037] The environmental value information D2 includes information regarding the price history of multiple environmental value plans. The multiple environmental value plans may be offered by multiple different environmental value providers, rather than by a single environmental value provider. In this embodiment, the multiple environmental value plans include fixed-price environmental value plans in which the price of the environmental value is constant, and variable-price environmental value plans in which the price of the environmental value fluctuates. In other words, the multiple environmental value plans are classified as fixed-price environmental value plans or variable-price environmental value plans.

[0038] For example, the first arithmetic circuit 35 may obtain the environmental value information D2 by accessing the environmental value provider server 24 via the first communication device 33 and collecting information on the price history of the environmental value plan.

[0039] The first calculation circuit 35 is configured to acquire demand information D3 and store it in the first storage device 34.

[0040] The demand information D3 includes energy demand and an environmental target. The energy demand and the environmental target are determined by the user 5. The energy demand is, for example, the amount of energy for a certain period of time. The certain period may be, for example, a year or a month. In this embodiment, the first arithmetic circuit 35 is communicatively connected to the measurement equipment 21 and the renewable energy equipment 22 via the first communication device 33. The first arithmetic circuit 35 can access consumption information related to the history of energy usage obtained from the measurement equipment 21. The first arithmetic circuit 35 can determine the energy demand based on the consumption information. The first arithmetic circuit 35 can access production information related to the history of energy production obtained from the renewable energy equipment 22. The first arithmetic circuit 35 can correct the energy demand based on the production information. The first arithmetic circuit 35 may automatically calculate the energy demand and present it to the user 5 as a reference value. The user 5 can determine the final energy demand based on the reference value. This reduces the effort required to determine the energy demand.

[0041] The demand information D3 further includes a tolerance for the risk of price fluctuations in the combination plan. The tolerance for the risk of price fluctuations defines the range of prices of the combination plan that the user 5 can accept. The tolerance may be, for example, the ratio (%) of the standard deviation of the price of the combination plan to the expected price value, or the upper limit (yen) of the standard deviation of the price of the combination plan. This makes it easy to reflect the preferences of the user 5 in the combination plan.

[0042] The demand information D3 may include restriction information. The restriction information is information regarding the conditions of energy plans and / or environmental value plans that are not used in the combination plan, among the multiple energy plans and / or multiple environmental value plans. In this embodiment, the restriction information includes, for energy plans, information regarding whether a fixed-price energy plan and a variable-price energy plan can be selected. For environmental value plans, the restriction information includes information regarding whether a fixed-price environmental value plan and a variable-price environmental value plan can be selected. In other words, the restriction information allows the user 5 to specify the conditions of energy plans and / or environmental value plans that he or she does not want to include in the combination plan, from the multiple energy plans and multiple environmental value plans. This makes it possible to easily reflect the preferences of the user 5 in the combination plan.

[0043] The demand information D3 may include designation information. The designation information designates at least one of a plurality of energy plans and a plurality of environmental value plans. The designation information is set by the user 5. In other words, the user 5 can use the designation information to designate an energy plan and / or an environmental value plan that the user 5 wants to include in the combined plan from the plurality of energy plans and the plurality of environmental value plans. This makes it possible to easily reflect the preferences of the user 5 in the combined plan.

[0044] For example, the first arithmetic circuit 35 may be capable of communicating with the information terminal 4 via the first communication device 33, and may accept input of part or all of the demand information D3 from a user via the information terminal 4. The input of the demand information D3 will be described later.

[0045] The first arithmetic circuit 35 presents a plurality of combination plans of energy plans and environmental value plans that satisfy the energy demand and environmental targets specified in the demand information D3, as well as a price fluctuation risk index value for each of the plurality of combination plans, based on the energy information D1 and the environmental value information D2. In particular, in this embodiment, the first arithmetic circuit 35 presents a price index value (first index value) and a price fluctuation risk index value (second index value) for each of the plurality of combination plans. The plurality of combination plans of energy plans and environmental value plans that satisfy the energy demand and environmental targets, as well as the first price index value and the second price fluctuation risk index value for each of the plurality of combination plans, are included in recommendation information D4.

[0046] The first calculation circuit 35 extracts, from the plurality of energy plans and the plurality of environmental value plans, a combination of an energy plan and an environmental value plan that satisfies the energy demand and environmental target specified in the demand information D3, as a combined plan.

[0047] When extracting a combination plan, the first arithmetic circuit 35 extracts a combination of energy plans from a plurality of energy plans. The combination of energy plans includes a specified number of fixed energy plans and a specified number of variable energy plans. Here, the specified number of fixed energy plans and the specified number of variable energy plans are integers equal to or greater than 0, but are not simultaneously 0. The specified number of fixed energy plans and the specified number of variable energy plans may be adjusted as appropriate to generate any number of combination plans, or may be determined in advance. Furthermore, the specified number of fixed energy plans and the specified number of variable energy plans may be determined by the user 5.

[0048] The first arithmetic circuit 35 evaluates a combination of energy plans. In the evaluation of the combination of energy plans, the amount of environmental value required to achieve the environmental goal when the combination of energy plans satisfies the energy demand is evaluated.

[0049] Depending on the type of environmental value, the amount of environmental value can be, for example, CO ２It is expressed as the amount of emissions. A method for calculating the amount of environmental value will be explained based on the definitions in Table 1 below. In Table 1, t is time. Symbols containing t are past data. si indicates a fixed energy plan, vj indicates a variable energy plan, i is a number that identifies the fixed energy plan, and j is a number that identifies the variable energy plan. ek indicates an environmental value plan, and k is a number that identifies the environmental value plan.

[0050]

[0051] If a combination of energy plans satisfies the energy demand, the sum of the energy supply of the fixed energy plans and the energy supply of the variable energy plans is equal to the energy demand. ｓ , the set of variable energy plans is I ｖ Then, the following equation (1) holds:

[0052]

[0053] The proportion of fixed energy plans is a ｉ Then, the energy supply amount of the fixed energy plan x ｓｉ，ｔ is expressed by the following equation (2).

[0054]

[0055] Therefore, the above equation (1) can be rewritten as the following equation (3).

[0056]

[0057] CO2 emissions at time t are E ｔ Then, E ｔ is expressed by the following equation (4).

[0058]

[0059] CO in a predetermined period T ２ Consider purchasing environmental value to offset emissions. CO ２ The discharge amount is expressed by the following equation (5).

[0060]

[0061] In this way, it is possible to determine the amount of environmental value required to achieve the environmental goal when the energy demand amount is met by the combination of energy plans.

[0062] The first calculation circuit 35 extracts a combination of environmental value plans from the plurality of environmental value plans based on the calculated amount of environmental value. The combination of environmental value plans includes a specified number of fixed-price environmental value plans and a specified number of variable-price environmental value plans. Here, the specified number of fixed-price environmental value plans and the specified number of variable-price environmental value plans are integers equal to or greater than 0, but are not simultaneously 0. The specified number of fixed-price environmental value plans and the specified number of variable-price environmental value plans may be adjusted as appropriate to generate any number of combination plans, or may be determined in advance. Furthermore, the specified number of fixed-price environmental value plans and the specified number of variable-price environmental value plans may be determined by the user 5.

[0063] An example of a combination plan will be described below.

[0064] The first example of the combined plan includes one of the multiple fixed energy plans but does not include any of the multiple environmental value plans. If the environmental goal can be achieved with a single fixed energy plan, there is no need to combine environmental value plans. The first example of the combined plan can simplify the content of the combined plan. This allows the user 5 to achieve the environmental goal while satisfying their energy demand, for example, through a simple contract.

[0065] The second example of the combined plan includes one of a plurality of fixed energy plans and one of a plurality of environmental value plans. The second example of the combined plan can simplify the content of the combined plan. This allows the user 5 to, for example, meet their energy demands and achieve their environmental goals through a simple contract.

[0066] The third example of the combination plan includes one of multiple fixed energy plans and one of multiple variable energy plans. If the environmental goal can be achieved by combining the fixed energy plan and the variable energy plan, there is no need to combine the environmental value plan. By adopting the variable energy plan, the proportion of non-fossil fuel power can be increased. Therefore, the third example of the combination plan makes it possible to reduce the cost of purchasing environmental values. Furthermore, the third example of the combination plan can simplify the content of the combination plan.

[0067] The fourth example of the combination plan includes one of a plurality of fixed energy plans, one of a plurality of variable energy plans, and one of a plurality of environmental value plans. By adopting the variable energy plan, the proportion of non-fossil fuel power sources can be increased. Therefore, the fourth example of the combination plan can reduce the cost of purchasing environmental values. Furthermore, the fourth example of the combination plan can simplify the content of the combination plan.

[0068] A fifth example of the combination plan includes two or more of the multiple variable energy plans. If the environmental goal can be achieved by combining two or more variable energy plans, there is no need to combine environmental value plans. If a single variable energy plan cannot meet demand, the proportion of non-fossil fuel energy can be increased by combining multiple variable energy plans to meet demand. The fifth example of the combination plan enables a reduction in the cost of purchasing environmental value and a stabilization of energy supply. Furthermore, the fifth example of the combination plan can simplify the content of the combination plan. Here, it is preferable that two or more of the multiple variable energy plans have a third index value of the correlation of energy supply amounts that is equal to or less than a threshold. This enables further stabilization of energy supply. Furthermore, the third index value may be the covariance of energy supply amounts. This enables a simplification of the calculation of the third index value.

[0069] A sixth example of the combination plan includes two or more of the plurality of variable energy plans and one of the plurality of environmental value plans. The sixth example of the combination plan enables a reduction in the cost of purchasing environmental values ​​and a stabilization of the energy supply. Furthermore, the sixth example of the combination plan can simplify the content of the combination plan.

[0070] In the fifth and sixth examples, it is preferable that the total amount of energy supply from the variable energy plans always exceeds the amount of energy demand, or that a decrease in the amount of energy supply can be compensated for by storing surplus energy.

[0071] A seventh example of the combination plan includes two or more of a plurality of fixed energy plans in which the energy supply amount is constant but the price fluctuates. If the environmental goal can be achieved with the plurality of fixed energy plans, there is no need to combine environmental value plans. The seventh example of the combination plan enables a reduction in the risk of price fluctuations due to the fixed energy plans. Furthermore, the seventh example of the combination plan can simplify the content of the combination plan. Here, it is preferable that two or more of the plurality of fixed energy plans have a fourth index value of energy price correlation that is equal to or less than a threshold value. This enables a further reduction in the risk of price fluctuations due to the fixed energy plans. Furthermore, it is preferable that the fourth index value is the covariance of energy prices. This enables a simplification of the calculation of the fourth index value.

[0072] An eighth example of the combination plan includes two or more of a plurality of fixed energy plans in which the amount of energy supplied is constant but the price fluctuates, and one of a plurality of environmental value plans. The eighth example of the combination plan makes it possible to reduce the risk of price fluctuations due to the fixed energy plans. Furthermore, the eighth example of the combination plan makes it possible to simplify the content of the combination plan.

[0073] A ninth example of the combination plan further includes, in addition to a combination of one or more energy plans, two or more of a plurality of price-varying environmental value plans whose prices fluctuate. The ninth example of the combination plan enables a reduction in the risk of price fluctuations due to the price-varying environmental value plans. Here, it is preferable that two or more of the plurality of price-varying environmental value plans have a fifth index value of the correlation between the prices of environmental values ​​that is equal to or less than a threshold. This enables a further reduction in the risk of price fluctuations due to the price-varying environmental value plans. Furthermore, it is preferable that the fifth index value is the covariance of the prices of environmental values. This enables a simplification of the calculation of the fifth index value. Note that the combination of one or more energy plans may be any of the combinations of the first to eighth examples of the combination plan described above.

[0074] In this way, the first arithmetic circuit 35 determines a combination plan. The first arithmetic circuit 35 calculates, for the combination plan, a first index value of the price of the combination plan and a second index value of the risk of price fluctuation.

[0075] The first index value of the price of the combination plan is a value presented to the user 5 as the price of the combination plan. The price of the combination plan is not necessarily constant and may fluctuate. The first index value may be a statistical value of the price of the combination plan, and in this embodiment, it is an expected value of the price of the combination plan.

[0076] The second index value for the risk of price fluctuations of the combination plan is a value presented to the user 5 as the risk of price fluctuations of the combination plan. Price fluctuations of the combination plan are affected by price fluctuations of the energy plan and / or environmental value plan included in the combination plan. If the risk of price fluctuations is high, the user 5 may be required to pay an unexpected amount of money. The second index value may be a statistical value indicating the degree of price fluctuations of the combination plan, and in this embodiment, it is the standard deviation of the price of the combination plan. Note that, since the standard deviation and the variance are considered to be substantially the same, the variance of the price of the combination plan may also be used as the second index value.

[0077] The calculation of the first index value and the second index value will be described below. ｔ Using the above equation (3), P1 ｔ is expressed by the following equation (6).

[0078]

[0079] Price of environmental value plan P2 ｔ Let the set of environmental value plans be I ｋ , the ratio of environmental value plan to b ｋ Using the above formula (5), the price of the environmental value plan P2 ｔ is expressed by the following equation (7).

[0080]

[0081] The price of the combination plan is P ｔ Then, P ｔ = P1 ｔ +P2 ｔ The price P of the combined plan is calculated from the information on the price history of the plurality of energy plans included in the energy information D1 and the information on the price history of the plurality of environmental value plans included in the environmental value information D2. ｔ Therefore, the price of the combined plan P ｔ From the probability distribution of ｔ The expected value and standard deviation of the ratio a can be calculated as the first index value and the second index value. ｉ , b ｋ is preferably optimized such that the first index value and the second index value are minimized.

[0082] After providing the recommendation information D4 to the information terminal 4, the first arithmetic circuit 35 can receive selection information D5 (see FIG. 12 ) from the information terminal 4. The selection information D5 selects one of a plurality of combination plans. The selection information D5 may be transmitted from the information terminal 4 to the presentation system 3 in response to the user 5 selecting one of the plurality of combination plans included in the recommendation information D4 presented on the information terminal 4. Upon receiving the selection information D5, the first arithmetic circuit 35 provides user information D6 (see FIG. 12 ) associated with the selection information D5 to the energy provider and the environmental value provider associated with the energy plan and the environmental value plan included in the combination plan selected in the selection information D5, respectively. In this embodiment, the first arithmetic circuit 35 provides the user information D6 associated with the selection information D5 to the energy provider server 23 and the environmental value provider server 24 associated with the energy plan and the environmental value plan included in the combination plan selected in the selection information D5, respectively. The user information D6 may include information for the energy provider and the environmental value provider to contact the user 5. For example, the user information D6 may include information about the user's contact details, such as address, whereabouts, telephone number, and email address.

[0083] After providing the recommendation information D4 to the information terminal 4, the first calculation circuit 35 can receive modified demand information D30 (see FIG. 13 ) from the information terminal 4. The modified demand information D30 is demand information D3 in which at least one of the energy demand and the environmental target has been modified. The modified demand information D30 may be transmitted from the information terminal 4 to the presentation system 3 in response to the user 5 modifying at least one of the energy demand and the environmental target included in the demand information D3. Upon receiving the modified demand information D30, the first calculation circuit 35 presents, based on the energy information D1 and the environmental value information D2, a plurality of modified combination plans of energy plans and environmental value plans that satisfy the energy demand and the environmental target identified in the demand information D3, as well as a price fluctuation risk index value for each of the modified combination plans. In particular, in this embodiment, the first calculation circuit 35 can present a price index value (first index value) and a price fluctuation risk index value (second index value) for each of the modified combination plans. The revised combination plans of energy plans and environmental value plans that satisfy the energy demand and the environmental target, the first index value of the price of each of the revised combination plans, and the second index value of the risk of price fluctuation are included in revised recommendation information D40 (see FIG. 13 ). The first arithmetic circuit 35 can transmit the revised recommendation information D40 to the information terminal 4.

[0084] The information terminal 4 is communicatively connected to the presentation system 3 via a communication network. The information terminal 4 is used for inputting information (mainly demand information D3 and revised demand information D30) by the user 5 and for presenting information (mainly recommendation information D4 and revised recommendation information D40) to the user 5. The information terminal 4 has a function of displaying a screen for exchanging information with the presentation system 3 and serves as a graphical user interface (GUI). FIG. 3 is a block diagram of the information terminal 4. The information terminal 4 includes a second input device 41, a second output device 42, a second communication device 43, a second storage device 44, and a second arithmetic circuit 45. The information terminal 4 can be realized, for example, by a personal computer (desktop computer, laptop computer), a mobile terminal (smartphone, tablet terminal, etc.), etc. The configurations of the second input device 41, the second output device 42, the second communication device 43, the second memory device 44, and the second arithmetic circuit 45 are similar to the configurations of the first input device 31, the first output device 32, the first communication device 33, the first memory device 34, and the first arithmetic circuit 35.

[0085] [1.2 Operation] Next, a description will be given of an example of the operation of the presentation system 3. Each of FIGS.

[0086] 4 , the first arithmetic circuit 35 acquires demand information D3 (S11). A part or all of the demand information D3 is input by the user 5 using the information terminal 4. In order to receive the demand information D3 from the user 5, the first arithmetic circuit 35 cooperates with the second arithmetic circuit 45 of the information terminal 4 to present an input screen on the second output device 42.

[0087] 7 to 10 are schematic diagrams of parts of input screens for demand information D3.

[0088] 7 shows an input window W1 for inputting energy types, energy demand, and environmental targets. The input window W1 includes item labels L10, L20, and L30, selection buttons RB11 to RB13, RB21, RB22, and RB31 to RB33, option labels L11 to L13, L21, L22, and L31 to L33, and input fields F21 and F22.

[0089] The item label L10 corresponds to the item "Energy Type" and displays the characters "Energy Type" indicating the item. The selection buttons RB11 to RB13 are buttons for selecting an energy type and are radio buttons from which one can be selected. The selection buttons RB11 to RB13 correspond to electricity, LNG, and gasoline, respectively. Option labels L11 to L13 are arranged near the selection buttons RB11 to RB13, respectively. The option labels L11 to L13 display the characters "Electricity," "LNG," and "Gasoline," respectively.

[0090] In the input window W1, the user 5 can use the selection buttons RB11 to RB13 to select the energy type from among electricity, LNG, and gasoline.

[0091] The item label L20 corresponds to the "energy demand" item and displays the word "demand" to indicate that item. The selection buttons RB21 and RB22 are buttons for selecting how to input the energy demand and are radio buttons from which one can be selected. The selection button RB21 corresponds to the annual energy demand, and the selection button RB22 corresponds to the monthly energy demand for the year. Option labels L21 and L22 are arranged near the selection buttons RB21 and RB22. The option label L21 displays text such as "Enter annual total," and the option label L22 displays text such as "Enter by month." The input field F21 is arranged near the option label L21 and accepts input of the annual energy demand. The input field F22 is arranged near the option label L22 and accepts input of the monthly energy demand for the year. The energy demand calculated by the first arithmetic circuit 35 may be displayed in advance as a reference value in the input fields F21 and F22.

[0092] In the input window W1, the user 5 can input the amount of energy demand using the selection buttons RB21 and RB22 and the input fields F21 and F22.

[0093] The item label L30 corresponds to the "Environmental Target" item, and displays the characters "Environmental Target" to indicate the item. The selection buttons RB31 to RB33 are buttons for selecting an environmental target, and are radio buttons from which one can be selected. The selection buttons RB31 to RB33 correspond to RE100, SBT, and the Energy Conservation Act, respectively. Option labels L31 to L33 are arranged near the selection buttons RB31 to RB33, respectively. The option labels L31 to L33 display the characters "RE100," "SBT," and "Energy Conservation Act," respectively.

[0094] In the input window W1, the user 5 can use the selection buttons RB31 to RB33 to select the environmental target from RE100, SBT, and the Energy Conservation Act.

[0095] 8 shows an input window W2 for inputting the tolerance value for the price fluctuation risk of the combination plan. The input window W2 includes an item label L40, selection buttons RB41 and RB42, option labels L41 and L42, and input fields F41 and F42.

[0096] Item label L40 corresponds to the item "Price Fluctuation Risk Tolerance" and displays the words "Risk Upper Limit Setting" to indicate this item. Selection buttons RB41 and RB42 are buttons for selecting how to input the tolerance, and are radio buttons from which either one can be selected. Selection button RB41 corresponds to a method of inputting the tolerance as a ratio (%) of the standard deviation of the price of the combination plan to the expected price, and selection button RB42 corresponds to a method of inputting the tolerance as an upper limit (yen) of the standard deviation of the price of the combination plan. Option labels L41 and L42 are arranged near selection buttons RB41 and RB42. Option label L41 displays text such as "Standard Deviation Ratio (%) to Expected Value," and option label L42 displays text such as "Upper Limit of Standard Deviation (yen)." Input field F41 is arranged near option label L41 and accepts input of a ratio (%) of the standard deviation of the price of the combination plan to the expected price. The input field F42 is located near the option label L42 and accepts input of the upper limit (yen) of the standard deviation of the prices of the combination plan.

[0097] In the input window W2, the user 5 can input the tolerance using the selection buttons RB41 and RB42 and the input fields F41 and F42.

[0098] 9 shows an input window W3 for inputting restriction information. The input window W3 includes an item label L50 and an input field F50.

[0099] The item label L50 corresponds to the "Limit Information" item and displays the text "Fixed / Variable Price Plan Selection" to indicate the item. The input field F50 allows input of whether or not to select each of the fixed-price energy plan, variable-price energy plan, fixed-price environmental value plan, and variable-price environmental value plan. The input field F50 presents a table including rows for "Energy" and "Environmental Value" and columns for "Fixed" and "Variable." In the input field F50, a checkbox CB51 is placed in the cell identified by "Energy" and "Fixed," and whether or not the checkbox CB51 is checked indicates whether or not to select the fixed-price energy plan. A checkbox CB52 is placed in the cell identified by "Energy" and "Variable," and whether or not the checkbox CB52 is checked indicates whether or not to select the variable-price energy plan. A checkbox CB53 is placed in the cell identified by "Environmental Value" and "Fixed," and whether or not the checkbox CB53 is checked indicates whether or not to select the fixed-price environmental value plan. A check box CB54 is placed in the cell specified by "environmental value" and "variation," and whether or not the check box CB54 is checked indicates whether or not the price-variation environmental value plan can be selected. Check boxes CB51 to CB54 may be checked by default.

[0100] In the input window W3, the user 5 can input restriction information using the check boxes CB51 to CB54 in the input field F50.

[0101] 10 shows an input window W4 for inputting specific information. The input window W4 includes an item label L60, display labels L61 and L62, input fields F61 and F62, and reference buttons B61 and B62.

[0102] The item label L60 corresponds to the "Specified Information" item and displays the text "Specify Specific Plan" to indicate the item. The display labels L61 and L62 indicate the type of plan to be specified, i.e., whether it is an energy plan or an environmental value plan. The display label L61 displays the text "Energy," and the display label L62 displays the text "Environmental Value." The input field F61 is located near the display label L61 and accepts input of the energy plan to be specified. The reference button B61 is located near the input field F61 and displays a list of energy plans that can be specified and accepts selection of the energy plan to be specified. The input field F62 is located near the display label L62 and accepts input of the environmental value plan to be specified. The reference button B62 is located near the input field F62 and accepts input of the environmental value plan to be specified.

[0103] In the input window W4, the user 5 can input specific information using input fields F61 and F62.

[0104] Referring again to Figure 4, the first arithmetic circuit 35 obtains the number of combination plans to be presented (S12). The number of combination plans to be presented defines the number of combination plans to be presented to the user 5. The number of combination plans to be presented is input by the user 5 using the information terminal 4. In order to receive the number of combination plans to be presented from the user 5, the first arithmetic circuit 35 may cooperate with the second arithmetic circuit 45 of the information terminal 4 to present an input screen for inputting the number of combination plans to be presented on the second output device 42.

[0105] The first arithmetic circuit 35 refers to the designation information in the demand information D3 and determines whether or not an energy plan has been designated (S13).

[0106] If an energy plan is specified in step S13 (S13: YES), the first arithmetic circuit 35 selects the specified energy plan (S14), so that the specified energy plan is included in the combined plan.

[0107] The first arithmetic circuit 35 selects the designated number of fixed energy plans and includes them in the combined plan (S15).

[0108] The first calculation circuit 35 selects the designated number of variable energy plans and includes them in the combined plan (S16).

[0109] The first calculation circuit 35 evaluates the selected combination of energy plans (S17). By evaluating the combined energy plans, the CO 2 required to achieve the environmental target is calculated. ２ Emissions are required.

[0110] See Fig. 5. The first arithmetic circuit 35 refers to the designation information in the demand information D3 and determines whether or not an environmental value plan has been designated (S18).

[0111] If an environmental value plan is designated in step S18 (S18: YES), the first arithmetic circuit 35 selects the designated environmental value plan (S19). As a result, the designated environmental value plan is included in the combined plan.

[0112] The first calculation circuit 35 selects a designated number of fixed-price environmental value plans and includes them in the combined plan (S20).

[0113] The first calculation circuit 35 selects a designated number of price-fluctuation environmental value plans and includes them in the combination plan (S21).

[0114] The first calculation circuit 35 determines whether the environmental goal can be achieved with the selected combination of environmental value plans (S22). Specifically, the first calculation circuit 35 determines whether the CO 2 required to achieve the environmental goal with the selected combination of environmental value plans can be achieved with the selected combination of environmental value plans (S23). ２ Determine whether emissions can be met.

[0115] In step S22, if the environmental goal cannot be achieved with the selected combination of environmental value plans (S22: NO), the process returns to step S20, and the first arithmetic circuit 35 starts generating a new combination of environmental value plans.

[0116] In step S22, if the selected combination of environmental value plans can achieve the environmental goal (S22: YES), the first calculation circuit 35 calculates the first index value and the second index value of the combination plan (S23).

[0117] The first calculation circuit 35 determines whether the first index value and the second index value of the combination plan satisfy the allowable values ​​(S24).

[0118] In step S24, if the first index value and the second index value of the combination plan do not satisfy the allowable values ​​(S24: NO), the process returns to step S13, and the first arithmetic circuit 35 starts generating a new combination plan.

[0119] In step S24, if the first index value and the second index value of the combination plan satisfy the allowable values ​​(S24: YES), the first arithmetic circuit 35 adds the combination plan to the recommendation information D4 (S25).

[0120] See Fig. 6. The first calculation circuit 35 determines whether a combination plan for the number of presentations has been obtained (S26).

[0121] In step S26, if a combination plan with the number of presentations has not been obtained (S26: NO), the process returns to step S13, and the first arithmetic circuit 35 starts generating a new combination plan.

[0122] In step S26, if a combination plan with the number of presentations is obtained (S26: YES), the first arithmetic circuit 35 outputs recommendation information D4 (S27). In order to present the recommendation information D4 to the user 5, the first arithmetic circuit 35 cooperates with the second arithmetic circuit 45 of the information terminal 4 to present an output screen on the second output device 42.

[0123] 11 is a schematic diagram of an output screen for presenting recommendation information D4. The output screen includes display areas R1-1, R1-2, ..., R1-n for combination plans and a button B1.

[0124] Each display area R1 includes name labels L70, L71, and L72, output areas F71 and F72, and a graph G70. The name label L70 displays identification information for the combination plan displayed in the display area R1. In the display area R1-1, the name label L70 displays the text "Candidate 1." The name labels L71 and L72 display the text "Price" corresponding to the first index value and "Variation" corresponding to the second index value, respectively. The output area F71 is disposed near the name label L71 and displays the first index value of the corresponding combination plan. The output area F72 is disposed near the name label L72 and displays the second index value of the corresponding combination plan. The graph G70 shows a breakdown of the price of the combination plan, i.e., the price ratio of the energy plan and the environmental value plan included in the combination plan. The graph G70 is, for example, a pie chart.

[0125] Button B1 is used to rearrange the display of display areas R1-1, R1-2, ..., R1-n. Button B1 is, for example, a pull-down menu, and can rearrange display areas R1-1, R1-2, ..., R1-n in order of high to low price, high to low risk of price fluctuation, etc.

[0126] Next, a description will be given of an example of the operation of the recommendation system 1. Fig. 12 is a sequence diagram of a first example of the operation of the recommendation system 1.

[0127] The presentation system 3 acquires energy information D1 by accessing the energy provider server 23 and collecting information on the price history of energy plans. The presentation system 3 acquires environmental value information D2 by accessing the environmental value provider server 24 and collecting information on the price history of environmental value plans.

[0128] The information terminal 4 transmits the demand information D3 input by the user 5 to the presentation system 3 .

[0129] The presentation system 3 receives demand information D3 from the information terminal 4. Based on the energy information D1 and the environmental value information D2, the presentation system 3 generates recommendation information D4 including a plurality of combination plans of energy plans and environmental value plans that satisfy the energy demand and environmental target identified in the demand information D3, a first index value for the price of each of the plurality of combination plans, and a second index value for the risk of price fluctuations, and transmits the recommendation information D4 to the information terminal 4.

[0130] The information terminal 4 receives recommendation information D4 from the presentation system 3 and presents it to the user 5. The user 5 can select one of a plurality of combination plans included in the recommendation information D4 based on the user 5's preferences. When the user 5 selects a combination plan, the information terminal 4 transmits selection information D5 to the presentation system 3. The selection information D5 is associated with user information D6.

[0131] The presentation system 3 receives selection information D5 from the information terminal 4. The presentation system 3 transmits user information D6 associated with the selection information D5 to the energy provider server 23 and the environmental value provider server 24, which are respectively associated with the energy plan and the environmental value plan included in the combination plan selected in the selection information D5.

[0132] An energy provider associated with the energy provider server 23 can contact the user 5 based on the user information D6. Therefore, the user 5 can proceed with signing up for an energy plan without contacting the energy provider himself / herself.

[0133] The environmental value provider associated with the environmental value provider server 24 can contact the user 5 based on the user information D6. Therefore, the user 5 can proceed with the contract for the environmental value plan without contacting the environmental value provider himself / herself.

[0134] FIG. 13 is a sequence diagram of a second example of the operation of the recommendation system 1.

[0135] The presentation system 3 acquires energy information D1 by accessing the energy provider server 23 and collecting information on the price history of energy plans. The presentation system 3 acquires environmental value information D2 by accessing the environmental value provider server 24 and collecting information on the price history of environmental value plans.

[0136] The information terminal 4 transmits the demand information D3 input by the user 5 to the presentation system 3 .

[0137] The presentation system 3 receives demand information D3 from the information terminal 4. Based on the energy information D1 and the environmental value information D2, the presentation system 3 generates recommendation information D4 including a plurality of combination plans of energy plans and environmental value plans that satisfy the energy demand and environmental target identified in the demand information D3, a first index value for the price of each of the plurality of combination plans, and a second index value for the risk of price fluctuations, and transmits the recommendation information D4 to the information terminal 4.

[0138] The information terminal 4 receives the recommendation information D4 from the presentation system 3 and presents it to the user 5. If the user 5 does not find a combination plan that he or she likes among the multiple combination plans included in the recommendation information D4, he or she can modify at least one of the energy demand and the environmental target. The information terminal 4 transmits the modified demand information D30 input by the user 5 to the presentation system 3.

[0139] When the presentation system 3 receives the revised demand information D30, it generates revised recommendation information D4 based on the energy information D1 and the environmental value information D2, which includes multiple revised combination plans of energy plans and environmental value plans that satisfy the energy demand and environmental targets included in the revised demand information D30, as well as a first index value for the price of each of the multiple revised combination plans and a second index value for the risk of price fluctuations, and transmits the revised recommendation information D4 to the information terminal 4.

[0140] The information terminal 4 receives the revised recommendation information D4 from the presentation system 3 and presents it to the user 5. The user 5 can select one of the revised combination plans included in the revised recommendation information D4 based on the preferences of the user 5. When one of the revised combination plans is selected by the user 5, the information terminal 4 transmits selection information D5 to the presentation system 3.

[0141] The presentation system 3 receives selection information D5 from the information terminal 4. The presentation system 3 transmits user information D6 associated with the selection information D5 to the energy provider server 23 and the environmental value provider server 24, which are respectively associated with the energy plan and the environmental value plan included in the combination plan selected in the selection information D5.

[0142] [1.3 Effects, etc.] The presentation system 3 described above includes a first calculation circuit 35 that can access energy information D1 including information on the price history of multiple energy plans, environmental value information D2 including information on the price history of multiple environmental value plans, and demand information D3 including energy demand and environmental targets. Based on the energy information D1 and the environmental value information D2, the first calculation circuit 35 presents multiple combination plans of energy plans and environmental value plans that satisfy the energy demand and environmental targets, as well as index values ​​for the risk of price fluctuations for each of the multiple combination plans. This configuration enables more appropriate selection of energy plans and environmental value plans.

[0143] In particular, in recent years, many energy providers offer a variety of energy plans, and many environmental value providers offer a variety of environmental value plans. As a result, the number of combination plans of energy plans and environmental value plans has become enormous. It would require a great deal of effort for the user 5 to manually select a combination plan that suits his or her preferences from such a vast number of combination plans, making it virtually unrealistic. Furthermore, accurately determining the risk of price fluctuations in combination plans requires analyzing a vast amount of data on the prices of energy plans and environmental value plans, making it virtually unrealistic for the user 5 to perform such analysis himself or herself. The presentation system 3 can present a combination of energy plans and environmental value plans that is more appropriate for the user 5 from a larger number of energy plans and environmental value plans than if the user 5 were to select the energy plans and environmental value plans themselves, and can also present the risk of price fluctuations as an indicator for selecting a combination of energy plans and environmental value plans. This significantly reduces the effort required for the user 5 to select a combination of energy plans and environmental value plans.

[0144] In the presentation system 3, the first calculation circuit 35 presents a first index value of the price of each of a plurality of combination plans and a second index value of the risk of price fluctuation. This configuration enables more appropriate selection of energy plans and environmental value plans.

[0145] In the presentation system 3, the first index value is the expected value and the second index value is the variance or standard deviation. This configuration allows for simplification of the calculation of the first and second index values.

[0146] In the presentation system 3, the demand information D3 includes a tolerance value for the price fluctuation risk of the combination plan. The first index value and the second index value of the multiple combination plans satisfy the tolerance value. This configuration makes it possible to easily reflect the preferences of the user 5 in the combination plan.

[0147] In the presentation system 3, the multiple energy plans include a fixed-price energy plan in which the energy price is constant and a variable-price energy plan in which the energy price fluctuates. The demand information D3 includes energy selection information regarding whether the fixed-price energy plan or the variable-price energy plan can be selected. The multiple combination plans do not include either the fixed-price energy plan or the variable-price energy plan that is not selected in the energy selection information. This configuration makes it possible to easily reflect the preferences of the user 5 in the combination plans.

[0148] In the presentation system 3, the multiple environmental value plans include fixed-price environmental value plans in which the price of the environmental value is constant and variable-price environmental value plans in which the price of the environmental value fluctuates. The demand information D3 includes environmental value selection information regarding whether the fixed-price environmental value plan or the variable-price environmental value plan can be selected. The multiple combination plans do not include either the fixed-price environmental value plan or the variable-price environmental value plan that is not selected in the environmental value selection information. This configuration makes it possible to easily reflect the preferences of the user 5 in the combination plans.

[0149] In the presentation system 3, the demand information D3 includes designation information that designates at least one of a plurality of energy plans and a plurality of environmental value plans. Each of the plurality of combination plans includes at least one of the plurality of energy plans and a plurality of environmental value plans designated by the designation information. This configuration makes it possible to easily reflect the preferences of the user 5 in the combination plan.

[0150] In the presentation system 3, the plurality of energy plans include a plurality of fixed energy plans with a fixed amount of energy supply. At least one of the plurality of combined plans includes one of the plurality of fixed energy plans. This configuration can simplify the content of the combined plans.

[0151] In the presentation system 3, the multiple energy plans include multiple fixed energy plans with a constant energy supply amount and multiple variable energy plans with a variable energy supply amount to utilize renewable energy. At least one of the multiple combined plans includes one of the multiple fixed energy plans and one of the multiple variable energy plans. This configuration enables a reduction in the cost of purchasing environmental value.

[0152] In the presentation system 3, the multiple energy plans include multiple variable energy plans in which the amount of energy supply fluctuates to utilize renewable energy. At least one of the multiple combined plans includes two or more of the multiple variable energy plans. This configuration enables a reduction in the cost of purchasing environmental value and a stabilization of the energy supply.

[0153] In the presentation system 3, the third index value of the correlation of the energy supply amount is equal to or less than the threshold value for two or more of the multiple variable energy plans. This configuration enables further stabilization of the energy supply.

[0154] In the presentation system 3, the third index value is the covariance of the amount of energy supplied. This configuration allows for simplification of the calculation of the third index value.

[0155] In the presentation system 3, the plurality of energy plans include a plurality of fixed energy plans in which the amount of energy supplied is constant but the price is variable. At least one of the plurality of combined plans includes two or more of the plurality of fixed energy plans. This configuration makes it possible to reduce the risk of price fluctuations due to the fixed energy plans.

[0156] In the presentation system 3, the fourth index value of the correlation between energy prices of two or more of the multiple fixed energy plans is equal to or less than the threshold. This configuration enables further reduction in the risk of price fluctuations due to fixed energy plans.

[0157] In the presentation system 3, the fourth index value is the covariance of the energy prices. This configuration allows for a simplification of the calculation of the fourth index value.

[0158] In the presentation system 3, at least one of the plurality of combination plans does not include any of the plurality of environmental value plans, or includes one of the plurality of environmental value plans. This configuration can simplify the contents of the combination plans.

[0159] In the presentation system 3, the plurality of environmental value plans include a plurality of price-varying environmental value plans whose prices fluctuate. At least one of the plurality of combined plans further includes two or more of the plurality of price-varying environmental value plans. This configuration makes it possible to reduce the risk of price fluctuations due to the environmental value plans.

[0160] In the presentation system 3, the fifth index value of the correlation between the price of environmental value is equal to or less than the threshold value for two or more of the multiple price-fluctuating environmental value plans. This configuration enables further reduction in the risk of price fluctuations due to the environmental value plans.

[0161] In the presentation system 3, the fifth index value is the covariance of the price of the environmental value. This configuration allows for simplification of the calculation of the fifth index value.

[0162] In the presentation system 3, the first arithmetic circuit 35 presents an input screen for receiving input of the energy demand. This configuration can reduce the effort required to identify the energy demand.

[0163] In the presentation system 3, the first arithmetic circuit 35 can access consumption information relating to the history of energy usage and identifies energy demand based on the consumption information. This configuration can reduce the effort required to identify energy demand.

[0164] In the presentation system 3, when the first arithmetic circuit 35 receives selection information D5 for selecting one of a plurality of combination plans, it provides user information D6 associated with the selection information D5 to the energy provider and the environmental value provider associated with the energy plan and the environmental value plan included in the combination plan selected in the selection information D5. This configuration eliminates the need for the user to separately contact the energy provider and the environmental value provider, thereby reducing the burden on the user.

[0165] In the presentation system 3, when the first calculation circuit 35 receives modified demand information D30 in which at least one of the energy demand and the environmental target has been modified, the first calculation circuit 35 presents, based on the energy information D1 and the environmental value information D2, a plurality of modified combination plans of energy plans and environmental value plans that satisfy the energy demand and the environmental target included in the modified demand information D30, as well as an index value for the risk of price fluctuations for each of the modified combination plans. This configuration enables more appropriate selection of energy plans and environmental value plans. Because only energy plans and environmental value plans that satisfy at least one of the energy demand and the environmental target are transmitted to the presentation system 3, it is possible to conserve computational resources, such as those of one or more servers, that implement the presentation system 3.

[0166] In the presentation system 3 described above, the first arithmetic circuit 35 executes the following method (presentation method). This presentation method is executed by the first arithmetic circuit 35, which has access to energy information D1 including information on the price history of multiple energy plans, environmental value information D2 including information on the price history of multiple environmental value plans, and demand information D3 including energy demand and environmental targets, and presents multiple combination plans of energy plans and environmental value plans that satisfy the energy demand and environmental targets, as well as index values ​​for the risk of price fluctuations for each of the multiple combination plans, based on the energy information D1 and the environmental value information D2. This aspect enables more appropriate selection of energy plans and environmental value plans.

[0167] The above-described program is a program for causing the first arithmetic circuit 35 to execute the above-described presentation method. This aspect enables more appropriate selection of an energy plan and an environmental value plan.

[0168] [2. Modifications] The embodiments of the present disclosure are not limited to the above-described embodiments. The above-described embodiments can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Modifications of the above-described embodiments are listed below. The modifications described below can be applied in appropriate combinations.

[0169] In one modified example, the presentation system 3 does not necessarily have the function of acquiring the energy information D1 and the environmental information D2. The energy information D1 and the environmental information D2 may be stored in advance in the first storage device 34. The first storage device 34 may be a database server that is independent from the presentation system 3.

[0170] In one variant, the presentation system 3 does not necessarily have to be able to access consumption information relating to the history of energy usage, and does not necessarily have the functionality to identify energy demand based on consumption information.

[0171] In one modification, the input screen and the output screen may be changed as appropriate.

[0172] In one modification, unlike the above embodiment, the combination of energy plans is ２ It is not necessary to calculate the amount of emissions. For example, since non-fossil fuel certificates are bought and sold in units of "yen / kWh," it is sufficient to calculate the amount of energy required to offset with non-fossil fuel certificates from the combination of energy plans.

[0173] In one modified example, the presentation system 3 may be realized by a computer system such as a plurality of servers. It is not necessary that the plurality of functions (components) of the presentation system 3 be integrated into a single housing, and the components of the presentation system 3 may be distributed across a plurality of housings. Furthermore, at least some of the functions of the presentation system 3, for example, some of the functions of the first arithmetic circuit 35, may be realized by the cloud (cloud computing) or the like.

[0174] In one modified example, the presentation system 3 and the information terminal 4 may be realized by a single computer system. For example, multiple functions (components) of the presentation system 3 and the information terminal 4 may be integrated into a single housing.

[0175] [3. Aspects] As is clear from the above-described embodiment and modifications, the present disclosure includes the following aspects.

[0176] [Aspect 1] A presentation system comprising an arithmetic circuit that can access energy information including information on the price history of a plurality of energy plans, environmental value information including information on the price history of a plurality of environmental value plans, and demand information including energy demand and environmental targets, wherein the arithmetic circuit presents, based on the energy information and the environmental value information, a plurality of combination plans of energy plans and environmental value plans that satisfy the energy demand and the environmental targets, and an index value for the risk of price fluctuations for each of the plurality of combination plans.

[0177] [Aspect 2] The presentation system of Aspect 1, wherein the arithmetic circuit presents a first index value of the price of each of the plurality of combination plans and a second index value of the risk of price fluctuation.

[0178] [Aspect 3] The presentation system according to aspect 2, wherein the first index value is an expectation value, and the second index value is a variance or a standard deviation.

[0179] [Aspect 4] The presentation system according to aspect 3, wherein the demand information includes an allowable value for a risk of price fluctuation of the combination plan, and the first index value and the second index value of the plurality of combination plans satisfy the allowable value.

[0180] [Aspect 5] The presentation system of any one of Aspects 1 to 4, wherein the plurality of energy plans include a fixed-price energy plan in which the price of energy is constant and a variable-price energy plan in which the price of energy fluctuates, the demand information includes energy selection information regarding whether the fixed-price energy plan or the variable-price energy plan can be selected, and the plurality of combined plans does not include either the fixed-price energy plan or the variable-price energy plan that is not selected in the energy selection information.

[0181] [Aspect 6] A presentation system according to any one of Aspects 1 to 5, wherein the plurality of environmental value plans include a fixed-price environmental value plan in which the price of the environmental value is constant and a variable-price environmental value plan in which the price of the environmental value fluctuates, the demand information includes environmental value selection information regarding whether the fixed-price environmental value plan or the variable-price environmental value plan can be selected, and the plurality of combined plans do not include either the fixed-price environmental value plan or the variable-price environmental value plan that is not selected in the environmental value selection information.

[0182] [Aspect 7] The presentation system of any one of Aspects 1 to 6, wherein the demand information includes designation information that designates at least one of the plurality of energy plans and the plurality of environmental value plans, and each of the plurality of combination plans includes at least one of the plurality of energy plans and the plurality of environmental value plans designated by the designation information.

[0183] [Aspect 8] The presentation system according to any one of Aspects 1 to 7, wherein the plurality of energy plans include a plurality of fixed energy plans with a fixed amount of energy supply, and at least one of the plurality of combination plans includes one of the plurality of fixed energy plans.

[0184] [Aspect 9] The presentation system of any one of Aspects 1 to 7, wherein the plurality of energy plans include a plurality of fixed energy plans with a constant energy supply amount and a plurality of variable energy plans with a variable energy supply amount to utilize renewable energy, and at least one of the plurality of combined plans includes one of the plurality of fixed energy plans and one of the plurality of variable energy plans.

[0185] [Aspect 10] The presentation system according to any one of Aspects 1 to 7, wherein the plurality of energy plans include a plurality of variable energy plans in which the amount of energy supply fluctuates to utilize renewable energy, and at least one of the plurality of combined plans includes two or more of the plurality of variable energy plans.

[0186] [Aspect 11] The presentation system according to aspect 10, wherein the two or more of the plurality of variable energy plans have a third index value of a correlation of the amount of energy supply that is equal to or less than a threshold value.

[0187] [Aspect 12] The presentation system according to aspect 11, wherein the third index value is a covariance of the amount of energy supply.

[0188] [Aspect 13] The presentation system according to any one of Aspects 1 to 7, wherein the plurality of energy plans include a plurality of fixed energy plans in which the amount of energy supplied is constant but the price is variable, and at least one of the plurality of combination plans includes two or more of the plurality of fixed energy plans.

[0189] [Aspect 14] The presentation system according to aspect 13, wherein the two or more of the plurality of fixed energy plans have a fourth index value of energy price correlation that is equal to or less than a threshold value.

[0190] [Aspect 15] The presentation system of aspect 14, wherein the fourth index value is a covariance of the prices of the energy.

[0191] [Aspect 16] The presentation system according to any one of Aspects 8 to 15, wherein the at least one of the plurality of combination plans does not include any of the plurality of environmental value plans, or includes one of the plurality of environmental value plans.

[0192] [Aspect 17] The presentation system according to any one of Aspects 8 to 15, wherein the plurality of environmental value plans include a plurality of price-varying environmental value plans whose prices fluctuate, and the at least one of the plurality of combination plans further includes two or more of the plurality of price-varying environmental value plans.

[0193] [Aspect 18] The presentation system according to aspect 17, wherein the two or more of the plurality of price-changing environmental value plans have a fifth index value of correlation between the price of environmental value that is equal to or less than a threshold value.

[0194] [Aspect 19] The presentation system according to aspect 18, wherein the fifth index value is a covariance of a price of an environmental value.

[0195] [Aspect 20] The presentation system according to any one of Aspects 1 to 19, wherein the arithmetic circuit presents an input screen for accepting input of the energy demand.

[0196] [Aspect 21] The presentation system according to any one of Aspects 1 to 20, wherein the arithmetic circuitry has access to consumption information relating to a history of energy usage, and identifies the energy demand based on the consumption information.

[0197] [Aspect 22] The presentation system according to any one of Aspects 1 to 21, wherein, when the arithmetic circuit receives selection information selecting one of the plurality of combination plans, it provides user information associated with the selection information to an energy provider and an environmental value provider associated with an energy plan and an environmental value plan included in the combination plan selected by the selection information.

[0198] [Aspect 23] The presentation system of any one of claims 1 to 22, wherein, when the calculation circuit receives revised demand information in which at least one of the energy demand and the environmental target has been revised, it presents, based on the energy information and the environmental value information, a plurality of revised combination plans of energy plans and environmental value plans that satisfy the energy demand and the environmental target included in the revised demand information, and an index value for the risk of price fluctuations for each of the plurality of revised combination plans.

[0199] [Aspect 24] A presentation method executed by a calculation circuit that can access energy information including information on the price history of a plurality of energy plans, environmental value information including information on the price history of a plurality of environmental value plans, and demand information including energy demand and an environmental target, the presentation method presents, based on the energy information and the environmental value information, a plurality of combination plans of energy plans and environmental value plans that satisfy the energy demand and the environmental target, and an index value of price fluctuation for each of the plurality of combination plans.

[0200] [Aspect 25] A program for causing the arithmetic circuit to execute the presentation method of aspect 24.

[0201] Aspects 2 to 23 are optional elements and are not essential. Aspects 2 to 23 can be appropriately combined with Aspect 24.

[0202] The present disclosure is applicable to a presentation system, a presentation method, and a program. Specifically, the present disclosure is applicable to a presentation system, a presentation method, and a program for selecting an energy plan and an environmental value plan.

[0203] 3 Presentation system 35 First calculation circuit (calculation circuit) D1 Energy information D2 Environmental value information D3 Demand information

Claims

1. A presentation system comprising an arithmetic circuit that can access energy information including information regarding the price history of a plurality of energy plans, environmental value information including information regarding the price history of a plurality of environmental value plans, and demand information including energy demand and environmental targets, wherein the arithmetic circuit presents a plurality of combination plans of energy plans and environmental value plans that satisfy the energy demand and the environmental targets, and an index value for the risk of price fluctuation for each of the plurality of combination plans, based on the energy information and the environmental value information.

2. The presentation system according to claim 1, wherein the calculation circuit presents a first index value of the price of each of the plurality of combination plans and a second index value of a risk of price fluctuation.

3. The presentation system according to claim 2, wherein the first index value is an expectation value, and the second index value is a variance or a standard deviation.

4. The presentation system of claim 3, wherein the demand information includes a tolerance value for a risk of price fluctuation of the combination plan, and the first index value and the second index value of the multiple combination plans satisfy the tolerance value.

5. The presentation system of any one of claims 1 to 4, wherein the plurality of energy plans include a fixed-price energy plan in which the energy price is constant and a variable-price energy plan in which the energy price fluctuates, the demand information includes energy selection information regarding whether the fixed-price energy plan and the variable-price energy plan can be selected, and the plurality of combination plans does not include either the fixed-price energy plan or the variable-price energy plan that is not selected in the energy selection information.

6. The presentation system of any one of claims 1 to 4, wherein the plurality of environmental value plans include a fixed-price environmental value plan in which the price of the environmental value is constant and a price-variable environmental value plan in which the price of the environmental value varies, the demand information includes environmental value selection information regarding whether the fixed-price environmental value plan and the price-variable environmental value plan can be selected, and the plurality of combination plans do not include either the fixed-price environmental value plan or the price-variable environmental value plan that is not selected in the environmental value selection information.

7. A presentation system according to any one of claims 1 to 4, wherein the demand information includes designation information that designates at least one of the plurality of energy plans and the plurality of environmental value plans, and each of the plurality of combination plans includes at least one of the plurality of energy plans and the plurality of environmental value plans designated by the designation information.

8. The presentation system of claim 1, wherein the plurality of energy plans include a plurality of fixed energy plans with a fixed amount of energy supply, and at least one of the plurality of combination plans includes one of the plurality of fixed energy plans.

9. The presentation system of claim 1, wherein the plurality of energy plans include a plurality of fixed energy plans with a constant amount of energy supply and a plurality of variable energy plans with a variable amount of energy supply to utilize renewable energy, and at least one of the plurality of combination plans includes one of the plurality of fixed energy plans and one of the plurality of variable energy plans.

10. The presentation system of claim 1, wherein the plurality of energy plans include a plurality of variable energy plans in which the amount of energy supply fluctuates to utilize renewable energy, and at least one of the plurality of combination plans includes two or more of the plurality of variable energy plans.

11. The presentation system according to claim 10, wherein the two or more of the plurality of variable energy plans have a third index value of correlation of energy supply amounts that is equal to or less than a threshold value.

12. The presentation system of claim 1, wherein the plurality of energy plans includes a plurality of fixed energy plans having a constant supply of energy but a variable price, and at least one of the plurality of combination plans includes two or more of the plurality of fixed energy plans.

13. The presentation system according to any one of claims 8 to 12, wherein the at least one of the plurality of combination plans does not include any of the plurality of environmental value plans, or includes one of the plurality of environmental value plans.

14. The presentation system of any one of claims 8 to 12, wherein the plurality of environmental value plans include a plurality of price-varying environmental value plans whose prices fluctuate, and the at least one of the plurality of combination plans further includes two or more of the plurality of price-varying environmental value plans.

15. The presentation system according to any one of claims 1 to 4, wherein the arithmetic circuit presents an input screen for receiving input of the energy demand.

16. The presentation system of any one of claims 1 to 4, wherein the computing circuitry has access to consumption information relating to a history of energy usage and determines the energy demand based on the consumption information.

17. A presentation system according to any one of claims 1 to 4, wherein the calculation circuit, upon receiving selection information selecting one of the plurality of combination plans, provides user information associated with the selection information to an energy provider and an environmental value provider respectively associated with an energy plan and an environmental value plan included in the combination plan selected by the selection information.

18. A presentation system according to any one of claims 1 to 4, wherein when the calculation circuit receives revised demand information in which at least one of the energy demand and the environmental target is revised, it presents, based on the energy information and the environmental value information, a plurality of revised combination plans of energy plans and environmental value plans that satisfy the energy demand and the environmental target included in the revised demand information, and an index value for the risk of price fluctuation for each of the plurality of revised combination plans.

19. A presentation method executed by a calculation circuit that can access energy information including information regarding the price history of a plurality of energy plans, environmental value information including information regarding the price history of a plurality of environmental value plans, and demand information including energy demand and environmental targets, the presentation method presenting a plurality of combination plans of energy plans and environmental value plans that satisfy the energy demand and the environmental targets, and an index value of price fluctuation for each of the plurality of combination plans, based on the energy information and the environmental value information.

20. A program for causing the arithmetic circuit to execute the method of claim 19.

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