Electricity transaction system and electricity transaction method

Abstract

To provide an electricity transaction system which enables stable electricity transaction.SOLUTION: An electricity transaction system which mediates electricity transaction between first users who sell electric power and second users who buy electric power includes: first terminals 2 which receive inputs of selling conditions for selling electric power to be presented to the second users, from the first users; a server device 1 which receives selling condition information indicating the selling conditions received by the first terminals 2, from the first terminals 2, and stores the received selling condition information in a storage unit 12; and second terminals 3 which receive the selling condition information from the server device 1, cause display units 31 to display the received selling condition information, and receive selections of the first users or the selling conditions from the second users. The selling conditions include information on an electricity transaction price and a power feeding period for the case of establishment of the electricity transaction.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a power trading system and a power trading method.

Background Art

[0002] In recent years, in Japan, power liberalization has been carried out. In 2016, consumers such as ordinary households and stores have been able to freely select from multiple retail electricity suppliers and conclude electricity supply contracts. Retail electricity suppliers procure electricity from power generation companies and the like in order to supply electricity to users who have concluded electricity supply contracts.

[0003] Patent Document 1 discloses a power trading management method suitable for providing a customer with an environmental value certificate that certifies a transaction with a power generation company that generates electricity by a power generation means using renewable energy.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in Japan, there is a power spot market provided by the Japan Electric Power Exchange (JEPX) as a place for power trading (power procurement) between retail electricity suppliers and power generation companies. In the power spot market, a power trading (buying and selling of electricity) is established by a power generation company bidding the amount of electricity to be sold and the selling price, and a retail electricity supplier bidding the amount of electricity to be purchased and the purchase price.

[0006] In this electricity spot market, electricity trading is conducted every half hour (30 minutes), and the trading price of electricity is determined. That is, in the electricity spot market, the period during which the trading price of electricity is determined by electricity trading is short. For this reason, in the electricity spot market, it is difficult to predict the trading price of electricity, and the operations of retail electricity providers (or power generation companies) may become unstable.

[0007] In particular, in this electricity spot market, the electricity price is determined in terms of the balance between supply and demand of bids (selling bids) from power generation companies, etc. and bids (buying bids) from retail electricity providers. As a result, since the trading price of electricity fluctuates greatly depending on the bid volumes of buying and selling, it is difficult to predict the trading price of electricity.

[0008] Therefore, an object of the present invention is to provide an electricity trading system capable of stably conducting electricity trading.

Means for Solving the Problems

[0009] In order to solve the above problems, an electricity trading system according to an embodiment of the present invention is an electricity trading system that mediates electricity trading between a first user who sells electricity and a second user who buys electricity, and includes a first terminal that receives an input of selling electricity conditions, which are the conditions for selling electricity presented from the first user to the second user, a server device that receives selling electricity condition information indicating the selling electricity conditions received by the first terminal from the first terminal and stores the received selling electricity condition information in a storage unit, and a second terminal that receives the selling electricity condition information from the server device, causes the received selling electricity condition information to be displayed on a display unit, and receives a selection of the first user or the selling electricity conditions from the second user. The selling electricity conditions include information regarding the trading price of electricity and the power supply period when the electricity trading is concluded.

[0010] According to an embodiment of the present invention, a first terminal receives power selling conditions presented by a first user to a second user. A server device stores the power selling conditions received by the first terminal in a storage unit. A second terminal displays the power selling conditions stored in the storage unit of the server device on a display unit and receives a selection from the second user for the first user or the power selling conditions. Thereby, a power transaction between the first user and the second user can be established.

[0011] In addition, the power selling conditions received by the first terminal include information regarding the transaction price of power and the power supply period when the power transaction is established. Thereby, since the first user can present a power transaction by determining the transaction price of power and the power supply period to the second user, it becomes easier for the first user and the second user to make a prediction of the transaction price of power.

[0012] Therefore, a stable power transaction can be performed.

[0013] Further, the power supply period may include a period in units of time or days.

[0014] In Japan, as a power trading venue, in addition to the power spot market, there is also a forward market provided by the Japan Electric Power Exchange. In the forward market, power transactions can be conducted on a weekly or monthly basis, but transactions cannot be conducted by specifying a period in units of time or days. On the other hand, according to an embodiment of the present invention, a first terminal receives an input of a period in units of time or days as the power supply period from a first user. Thereby, since the first user can set the power supply period in units of days or time, the power supply period can be set flexibly.

[0015] Further, credit information indicating the creditworthiness in the business transactions of the second user is stored in the storage unit, and the server device may distribute the credit information to the first terminal.

[0016] According to an embodiment of the present invention, since the credit information indicating the creditworthiness of the second user is distributed from the server device to the first terminal, the first user can conduct a power transaction while referring to the credit information. Thereby, the first user can determine whether to conclude a power transaction in consideration of the credit information of the second user.

[0017] Further, the server device may predict the transaction price of the power corresponding to the power supply period in the power trading market and distribute the prediction result to the second terminal.

[0018] According to an embodiment of the present invention, the prediction result of the transaction price of the power corresponding to the power supply period in the power trading market is distributed from the server device to the second terminal. Thereby, the second user can conduct a power transaction while comparing the prediction result of the power transaction price in the power trading market with the power selling conditions.

[0019] Further, the power selling conditions include the emission coefficient of greenhouse gases of the power generation facility that supplies power to the second user when the power transaction is concluded and the activity level of the power generation facility. The server device may calculate the emission amount of greenhouse gases of the power generation facility based on the emission coefficient and the activity level and distribute the calculation result to the second terminal.

[0020] According to an embodiment of the present invention, the emission amount of greenhouse gases of the power generation facility when the power transaction is concluded is distributed from the server device to the second terminal. Thereby, the second user can conduct a power transaction in consideration of the emission amount of greenhouse gases of the power generation facility.

[0021] Further, the power selling conditions include the type of the power generation facility, and the server device may distribute the type of the power generation facility to the second terminal.

[0022] According to an embodiment of the present invention, when a power transaction is established, the type of power generation facility is distributed from the server device to the second terminal. As a result, the second user can identify that electricity is supplied from a type of power generation facility capable of reducing or cutting greenhouse gas emissions, so that, for example, in power procurement, criteria that require identification of power generation facilities for suppressing greenhouse gas emissions, such as RE100, can be satisfied.

[0023] Further, when the power transaction is established, the server device may distribute information related to accounting processing to the first terminal or the second terminal.

[0024] According to an embodiment of the present invention, when the power transaction is established, information related to accounting processing is distributed from the server device to the first terminal or the second terminal. Thereby, information related to accounting processing different from normal accounting processing, such as hedge accounting processing or accounting processing of environmental value, can be notified to the first user or the second user.

[0025] Further, the first user may include one or more first users, and the second user may include one or more second users.

[0026] According to an embodiment of the present invention, the first user and the second user can perform a power transaction in a one-to-one, one-to-many, many-to-one, or many-to-many manner.

[0027] Further, the storage unit may be one of a plurality of storage devices constituting a distributed ledger.

[0028] According to an embodiment of the present invention, since the storage unit is one of a plurality of storage devices constituting a distributed ledger, the information stored in the storage unit is less likely to be tampered with.

[0029] In addition, a power trading system according to another embodiment of the present invention is a power trading system that mediates power trading between a first user who purchases power and a second user who sells power, and includes a first terminal that receives, from the first user, a power purchase condition that is a condition for power purchase to be presented to the second user, a server device that receives, from the first terminal, power purchase condition information indicating the power purchase condition received by the first terminal and stores the received power purchase condition information in a storage unit, and a second terminal that receives, from the server device, the power purchase condition information, causes the received power purchase condition information to be displayed on a display unit, and receives, from the second user, a selection of the first user or the power purchase condition. The power purchase condition includes information regarding a power trading price and a power supply period when the power trading is established.

[0030] According to an embodiment of the present invention, the first terminal receives a power purchase condition presented from the first user to the second user. The server device stores the power purchase condition received by the first terminal in the storage unit. The second terminal displays the power purchase condition stored in the storage unit of the server device on the display unit and receives a selection of the first user or the power purchase condition from the second user. Thereby, power trading between the first user and the second user can be established.

[0031] In addition, the power purchase condition received by the first terminal includes information regarding a power trading price and a power supply period when the power trading is established. Thereby, since the first user can present a power trade by determining a power trading price and a power supply period to the second user, it becomes easier for the first user and the second user to make a prediction about the power trading price.

[0032] Therefore, power trading can be stably performed.

[0033] Moreover, a power trading method according to another embodiment of the present invention is a power trading method for mediating power trading between a first user selling electricity and a second user buying electricity, comprising: a step in which a first terminal receives an input of selling electricity conditions, which are the conditions for selling electricity to be presented by the first user to the second user; a step in which a server device receives selling electricity condition information indicating the selling electricity conditions received by the first terminal from the first terminal, and stores the received selling electricity condition information in a storage unit; and a step in which a second terminal receives the selling electricity condition information from the server device, causes the received selling electricity condition information to be displayed on a display unit, and receives a selection of the first user or the selling electricity conditions from the second user. The selling electricity conditions include information regarding the trading price of electricity and the power supply period when the power trading is established.

[0034] According to an embodiment of the present invention, a first terminal receives selling electricity conditions presented by a first user to a second user. A server device stores the selling electricity conditions received by the first terminal in a storage unit. A second terminal displays the selling electricity conditions stored in the storage unit of the server device on a display unit and receives a selection of the first user or the selling electricity conditions from the second user. Thereby, power trading between the first user and the second user can be established.

[0035] Moreover, the selling electricity conditions received by the first terminal include information regarding the trading price of electricity and the power supply period when the power trading is established. Thereby, since the first user can present a power trading by determining the trading price of electricity and the power supply period to the second user, it becomes easier for the first user and the second user to make a prediction of the trading price of electricity.

[0036] Therefore, power trading can be stably performed.

Effects of the Invention

[0037] According to an embodiment of the present invention, power trading can be stably performed.

Brief Description of the Drawings

[0038]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0039] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely illustrative in nature and is not intended to limit the present invention, its applications, or its uses.

[0040] The power trading system according to this embodiment is used to mediate power trading between a first user who sells electricity and a second user who buys electricity.

[0041] FIG. 1 is a block diagram showing the configuration of the power trading system according to this embodiment. As shown in FIG. 1, the power trading system according to this embodiment includes a server device 1, a plurality of first terminals 2, and a plurality of second terminals 3. The server device 1 is configured to be communicable with the plurality of first terminals 2 and the plurality of second terminals 3 via a communication network N.

[0042] The first terminal 2 is, for example, a general-purpose PC or the like and is operated by the first user. The first user includes, for example, a power generation company, a trader, and a person (a prosumer) who has power generation facilities such as solar power generation among consumers, that is, a person who supplies (sells) electricity.

[0043] The first terminal 2 includes, for example, a display unit 21 such as a display, and an operation unit 22 such as a keyboard or a mouse. The first terminal 2 receives an operation input from the first user by the operation unit 22. The first terminal 2 transmits information indicating this operation input to the server device 1 via the communication network N.

[0044] The second terminal 3 is a PC or the like having the same configuration as the first terminal 2 and is operated by the second user. The second user includes, for example, those who receive (purchase electricity) power supply, such as retail electricity providers and consumers.

[0045] Similar to the first terminal, the second terminal 3 includes a display unit 31 and an operation unit 32. The second terminal 3 receives an operation input from the second user by the operation unit 32 and transmits information indicating the received operation input to the server device 1 via the communication network N.

[0046] (Regarding the configuration of the server device 1) As shown in FIG. 1, the server device 1 includes a communication unit 11, a storage unit 12, and a control unit 13.

[0047] The communication unit 11 is composed of, for example, an electric circuit and communicates with the first terminal 2 and the second terminal 3 via the communication network N.

[0048] The storage unit 12 is a storage medium composed of a ROM (Read Only Memory), a RAM (Random Access Memory), an HD D (Hard Disk Drive), an SSD (Solid State Drive), and the like. Various programs executed by the control unit 13 are stored in the storage unit 12.

[0049] In addition, various databases (DBs) are configured in the storage unit 12. Specifically, a power selling condition DB and a transaction establishment DB are stored in the storage unit 12. The power selling condition DB stores information indicating conditions for the first user to sell power to the second user. The transaction establishment DB stores information regarding established power transactions.

[0050] FIG. 2 is a conceptual diagram showing an example of the power selling condition DB according to the present embodiment. The power selling condition DB stores power selling conditions presented to the second user when the first user sells power. As shown in FIG. 2, for each user ID indicating the identification information of the first user, credit information, power supply area, power supply pattern, power supply start date, power supply end date, contract power amount, power price, payment due date, etc. are associated. Although not shown, the power selling conditions may include other conditions such as a period or deadline for accepting power purchase applications.

[0051] The credit information is information indicating the creditworthiness of the first user in commercial transactions. For example, it is determined according to the first user's payment ability for the price (assets and guarantees owned, etc.) and the creditworthiness regarding the first user's power supply. In FIG. 2, it is represented in three levels from A to C. This credit information is set, for example, based on the survey results of a predetermined credit investigation company.

[0052] The power supply area indicates the area (inside the pipe) where the first user supplies power. The power supply pattern indicates the time period during which the first user supplies power. The power supply start date and the power supply end date respectively indicate the start date and the end date when the first user starts power supply. The contracted power quantity indicates the amount of power that the first user supplies to the second user when the transaction is concluded. The electricity price indicates the transaction price of electricity when the electricity transaction is concluded. The payment due date indicates the payment due date when the electricity transaction is concluded. Note that the power supply period in this embodiment includes conditions related to the period when the first user sells electricity to the second user, such as the power supply pattern, the power supply start date, and the power supply end date. For example, in FIG. 2, the power supply period of the power selling condition with the user ID U_002 may be "from February 1, 2020 to February 8, 2020" based on the power supply start date and the power supply end date, or may be "from February 1, 2020 to February 8, 2020, 12:00 to 24:00" including the power supply pattern. Also, although not shown in this figure, the power supply period of the power selling condition may be specified only by the power supply pattern, such as "12:00 to 24:00", regardless of the power supply start date and the power supply end date. In this case, the actual power supply period after the transaction is concluded may be the period of power supply according to the specified power supply pattern from the power supply start date to the power supply end date agreed between the second user who has submitted an application to purchase electricity for the power selling condition indicated by the first user and the first user.

[0053] FIG. 3 is a conceptual diagram showing an example of a transaction-completed DB according to the present embodiment. Information indicating completed power transactions is stored in the transaction-completed DB. Specifically, in the transaction-completed DB, the first user ID and the second user ID store the user IDs of the first user and the second user for which the power transaction has been completed, respectively. And in the transaction-completed DB, information related to the completed power transaction (such as information on the power supply area, power supply pattern, power supply start date, power supply end date, contract power amount, power price, payment due date, etc.) is associated with the user IDs of the first and second users. Note that, as will be described later, the transaction-completed DB shown in FIG. 3 stores information related to the power sales conditions for which the power transaction has been completed among the power sales conditions DB shown in FIG. 2, and the power sales conditions are deleted in the power sales conditions DB shown in FIG. 2. Since FIGS. 2 and 3 of the present application show examples of the power sales conditions DB and the transaction-completed DB at the same point in time, the information stored in the power sales conditions DB shown in FIG. 2 and the information stored in the transaction-completed DB shown in FIG. 3 are not related (that is, the transaction-completed DB shown in FIG. 3 stores information related to the power sales conditions that have already been deleted from the power sales conditions DB shown in FIG. 2, and the power sales conditions DB shown in FIG. 2 stores new power sales conditions), which is exemplified as such.

[0054] The control unit 13 is composed of, for example, a microcomputer including a CPU (Central Processing Unit) and a semiconductor memory. The control unit 13 controls each part of the server device 1 by executing programs and the like stored in the storage unit 12.

[0055] Further, the control unit 13 includes a first screen processing unit 131, a condition registration unit 132, a second screen processing unit 133, and a transaction completion processing unit 134.

[0056] The first screen processing unit 131 controls the first screen displayed on the display unit 21 of the first terminal 2 in response to an operation on the operation unit 22 of the first terminal 2 from the first user. Various items included in the power selling conditions are displayed on the first screen, and inputs from the first user for each item are accepted. Here, the first screen accepts inputs for items such as the power supply area, power supply pattern, power supply start date, power supply end date, contract power quantity, electricity charge, and payment due date.

[0057] The condition registration unit 132 performs a registration process of storing the power selling conditions received by the first screen processing unit 131 in the power selling condition DB. Specifically, in the power selling condition DB, information related to the power selling conditions is associated with the user ID corresponding to the first user.

[0058] The second screen processing unit 133 controls the second screen displayed on the display unit 31 of the second terminal 3 in response to an operation on the operation unit 32 of the second terminal 3 from the second user. A list of the power selling conditions stored in the power selling condition DB is displayed on the second screen. Here, on the second screen, information such as credit information, power supply area, power supply pattern, power supply start date, power supply end date, contract power quantity, electricity charge, and payment due date, which is associated with each user ID as a power selling condition in the power selling condition DB, is displayed. And the second screen processing unit 133 accepts a selection of the first user (or the power selling conditions) from the second user through the second screen. Note that the second screen processing unit 133 does not necessarily need to display information (such as a company name or a personal name) on the second screen that identifies the first user.

[0059] The transaction establishment processing unit 134 performs a transaction establishment process of establishing a power transaction between the first user and the second user based on the selection received by the second screen processing unit 133. Specifically, the transaction establishment processing unit 134 deletes the power selling conditions for which the power transaction has been established from the power selling condition DB, and stores information related to the established power transaction in the transaction establishment DB. And when the power transaction is established, the transaction establishment processing unit 134 notifies the first user and the second user that the power transaction has been established.

[0060] (Regarding the operation of the power trading system) FIG. 4 and FIG. 5 are flowcharts showing the operations of the power trading system according to the present embodiment. Specifically, FIG. 4 shows a series of processes of the registration process, and FIG. 5 shows a series of processes of the transaction establishment process.

[0061] First, referring to FIG. 4, the registration process will be described.

[0062] When the first user performs a start operation on the operation unit 22 of the first terminal 2 to set the power selling conditions, the first terminal 2 requests the first screen data necessary to display the first screen on the display unit 21 from the server device 1 (step S11).

[0063] When the first screen processing unit 131 of the server device 1 receives the request for the first screen data (step S12), it transmits the first screen data to the first terminal 2 (step S13).

[0064] When the first terminal 2 receives the first screen data (step S14), it displays the first screen on the display unit 21 (step S15). Various items in the power selling conditions (for example, power supply area, power supply pattern, power supply start date, power supply end date, contract power amount, electricity charge, payment due date, etc.) are displayed on this first screen. Then, the first terminal 2 receives the input from the first user for each item via the first screen.

[0065] When the first terminal 2 receives the input from the first user for each item via the first screen (step S16), it generates first data indicating the input result (step S17). Then, the first terminal 2 transmits the generated first data to the server device 1 (step S18).

[0066] When the first screen processing unit 131 of the server device 1 receives the first data (step S19), the condition registration unit 132 detects information regarding the power selling conditions included in the first data. Then, the condition registration unit 132 performs a registration process of storing the detected information regarding the power selling conditions in the power selling condition DB (step S20). Specifically, the condition registration unit 132 associates the information regarding the power selling conditions with the user ID corresponding to the first user in the power selling condition DB.

[0067] Next, with reference to FIG. 5, the transaction establishment process will be described.

[0068] When the second user performs a start operation for conducting a power transaction on the operation unit 32 of the second terminal 3, the second terminal 3 requests the server device 1 for second screen data necessary for generating a second screen on the display unit 31 (step S31).

[0069] When the second screen processing unit 133 of the server device 1 receives the request for the second screen data (step S32), it reads out information regarding the power selling conditions (for example, credit information, power supply area, power supply pattern, power supply start date, power supply end date, contract power amount, electricity charge, payment due date, etc.) stored in the power selling condition DB from the storage unit 12 (step S33). Then, the second screen processing unit 133 generates second screen data including a list of power selling conditions (step S34), and transmits the generated second screen data to the second terminal 3 (step S35).

[0070] When the second terminal 3 receives the second screen data (step S36), it causes the second screen to be displayed on the display unit 31 (step S37). A list of power selling conditions is displayed on this second screen. Here, information such as credit information, power supply area, power supply pattern, power supply start date, power supply end date, contract power amount, electricity charge, payment due date, etc. is displayed as information regarding the power selling conditions on the second screen. Then, the second terminal 3 accepts a selection from the second user for the first user or the power selling conditions via the second screen.

[0071] When the second terminal 3 receives, via the second screen, a selection from the second user to purchase electricity from the first user or select a power selling condition (step S38), it generates second data indicating the selection result (step S39). Then, the second terminal 3 transmits the generated second data to the server device 1 (step S40).

[0072] When the second screen processing unit 133 of the server device 1 receives the second data (step S41), the transaction establishment processing unit 134 performs a transaction establishment process to establish a power transaction between the first user and the second user (step S42). Specifically, the transaction establishment processing unit 134 detects the power selling conditions selected by the second user included in the second data, deletes the detected power selling conditions from the power selling condition DB, and stores information regarding the established power transaction in the transaction establishment DB. Then, the transaction establishment processing unit 134 notifies the first user and the second user that the power transaction has been established. Here, after the second screen processing unit 133 of the server device 1 receives the second data, if the first screen processing unit 131 further receives data indicating the commitment of the first user from the first terminal 2, the transaction establishment processing unit 134 may perform a transaction establishment process to establish a power transaction between the first user and the second user. Also, before the transaction establishment process, the server device 1 may store second user-related information including the credit information of the second user in the storage unit 12, and the second user-related information may include the credit risk information of the second user based on the credit information of the second user. Further, when the second screen processing unit 133 of the server device 1 receives the second data, it transmits the second user-related information regarding the second data to the first terminal 2, and the first terminal 2 may transmit data indicating the commitment of the first user based on the second user-related information to the first screen processing unit 131 of the server device 1. Thereby, the first user can make a determination as to whether to establish a transaction considering the credit risk of the second user.

[0073] As described above, the power trading system according to this embodiment is a power trading system that mediates power trading between a first user who sells electricity and a second user who buys electricity. The power trading system according to this embodiment includes a first terminal 2 that receives an input of selling electricity conditions, which are conditions for selling electricity presented by the first user to the second user, a server device 1 that receives, from the first terminal 2, first data (selling electricity condition information) indicating the selling electricity conditions received by the first terminal 2 and stores the received first data in a storage unit 12, and a second terminal 3 that receives second screen data (selling electricity condition information) from the server device 1, causes the received second screen data to be displayed on a display unit 31, and receives a selection of the first user or the selling electricity conditions from the second user. The selling electricity conditions include information regarding the electricity price (transaction price of electricity), power supply pattern, power supply start date, and power supply end date (power supply period) when the power trading is established.

[0074] According to this configuration, the first terminal 2 receives the selling electricity conditions presented by the first user to the second user. The server device 1 stores the selling electricity conditions received by the first terminal 2 in the storage unit 12. The second terminal 3 displays the selling electricity conditions stored in the storage unit 12 on the display unit and receives a selection of the first user or the selling electricity conditions from the second user. Thereby, the power trading between the first user and the second user can be established.

[0075] In addition, the selling electricity conditions received by the first terminal 2 include information regarding the transaction price of electricity and the power supply period when the power trading is established. Thereby, the first user can present a power trading by determining the transaction price of electricity and the power supply period to the second user, so that it becomes easier for the first user and the second user to make a projection of the transaction price of electricity.

[0076] Therefore, the power trading can be stably performed.

[0077] Also, during the power supply period, a power supply pattern, a power supply start date, and a power supply end date (a period in time units or days) are included. In Japan, as a power trading venue, in addition to the power spot market, there is a forward market provided by the Japan Electric Power Exchange. In the forward market, power trading can be conducted on a weekly or monthly basis, but trading cannot be conducted by specifying a period in time units or days. In contrast, in the present embodiment, the first terminal 2 receives an input of a period in time units or days, such as a power supply pattern, a power supply start date, and a power supply end date, from the first user as the power supply period. Thereby, since the first user can set the power supply period in days or time units, the power supply period can be set flexibly.

[0078] Further, in the storage unit 12, credit information indicating the creditworthiness of the first user, which is determined according to the payment ability of the first user, is stored. The server device 1 transmits (distributes) the credit information to the second terminal 3.

[0079] According to this configuration, since the credit information indicating the creditworthiness of the first user is distributed from the server device 1 to the second terminal 3, the second user can conduct a power transaction while referring to the credit information. Thereby, when establishing a power transaction, the second user can determine whether or not he / she can stably receive power supply from the first user.

[0080] (Other Embodiments) As described above, embodiments have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and is also applicable to embodiments in which changes, replacements, additions, omissions, etc. are made as appropriate.

[0081] In the above-described embodiment, the first user is the operator that supplies power (sells electricity), and the second user is the operator that receives power supply (buys electricity). However, the first user and the second user may be reversed. That is, the first user may be the operator that buys electricity, and the second user may be the operator that sells electricity. In this case, the storage unit 12 is configured with a power purchase condition DB instead of the power sale condition DB. The power purchase condition DB stores the power purchase conditions presented to the second user when the first user purchases electricity. That is, the power trading system may be such that the first user operates the first terminal 2 to input the power purchase conditions, the storage unit 12 of the server device 1 manages the power purchase condition DB in which the input power purchase conditions are stored, and the second user operates the second terminal 3 to establish a power transaction with the first user. Thereby, even when presenting the conditions of the power transaction from the user who buys electricity to the user who sells electricity, the power transaction can be stably performed.

[0082] Further, the server device 1 has a function of predicting fluctuations in the trading price of electricity in the electricity trading market, such as the power spot market, the forward market, and the day-ahead market for electricity trading provided by the Japan Electric Power Exchange (JEPX), and may distribute the prediction results to at least one of the first terminal 2 and the second terminal 3. This function can be realized, for example, by a learning model generated based on information such as weather, temperature, power plant outage information, power supply reserve rate, tie-line available capacity, forward curve (including those related to electricity, coal, crude oil, and LNG), coal import price, crude oil import price, LNG import price, and past fluctuations in the trading price of electricity in the power spot market, or by a statistical method based on such information. With this configuration, the second user can conduct a power transaction while comparing the prediction result of the trading price of electricity in the electricity trading market with the power sale conditions.

[0083] Further, the server device 1 may be provided with a function of calculating the amount of greenhouse gas emissions of the power generation facility that supplies power, based on the emission factor of greenhouse gas of the power generation facility that supplies power and the activity level of the power generation facility. In this case, the server device 1 distributes the calculation result to the second terminal 3. For example, in step S16, the first screen accepts the input of the emission factor of greenhouse gas (e.g., carbon dioxide, methane, etc.) of the power generation facility and the activity level of the power generation facility. The activity level of this power generation facility refers to the amount of fuel used, the amount of incineration, etc. when the power generation facility is in operation. The server device 1 multiplies the emission factor of greenhouse gas of the power generation facility input on the first screen by the activity level of the power generation facility to calculate the amount of greenhouse gas emissions discharged by the power generation facility when generating power. For example, when a coal-fired power plant generates power using "general coal" (fuel type), the emission factor of greenhouse gas of the coal-fired power plant is 0.63478 tC / t, which is obtained by multiplying the calorific value of general coal, 25.7 GJ / t, by the emission factor related to the use of general coal, 0.0247 tC / GJ. By multiplying this emission count by the activity level (fuel usage) and a predetermined coefficient (a coefficient set according to the type of greenhouse gas), the server device 1 calculates the amount of greenhouse gas emissions. Thereby, the second user can conduct a power transaction in consideration of the amount of greenhouse gas emissions of the power generation facility.

[0084] Furthermore, the server device 1 may be provided with a function of calculating the total amount of greenhouse gas emissions of the second user, and distribute the calculation result to the second user. For example, the server device 1 calculates the total amount of greenhouse gas emissions of the second user by adding the total amount of greenhouse gas emissions of the power generation facilities owned by the second user himself and the total amount of greenhouse gas emissions of the power generation facilities for which a power transaction has been established according to this embodiment. Thereby, since the second user can know the total amount of his own greenhouse gas emissions, he can conduct a power transaction in consideration of the greenhouse gas reduction target.

[0085] In addition to the function of calculating the greenhouse gas emissions of the power generation facility, the server device 1 may also have a function of managing the types of power generation facilities. In this case, the server device 1 distributes information indicating the type of power generation facility to the second terminal 3. For example, in step S16, the first screen accepts input of the type of power generation facility (such as thermal power, hydropower, nuclear power, solar power, wind power, geothermal power, biomass, etc.). Here, currently, there is an initiative called RE100 (Renewable Energy 100%) that aims to cover 100% of the electricity used in its own business with renewable energy. In this initiative, "renewable energy" is defined as "hydropower, solar power, wind power, geothermal power, biomass". That is, by the server device 1 distributing information indicating the type of power generation facility to the second terminal 3, the second user can identify that electricity is supplied from a type of power generation facility that can reduce or cut greenhouse gas emissions, together with power source information such as the location of the power generation facility as the basic information of the first user. Therefore, when procuring electricity, for example, it can meet the criteria that require the identification of power generation facilities for suppressing greenhouse gas emissions, such as RE100.

[0086] In addition, when a power transaction is established, the server device 1 may have a function of distributing information related to accounting processing to the first terminal or the second terminal.

[0087] The information related to accounting processing is, for example, information related to hedge accounting processing. Since a power transaction is a transaction that agrees to supply and settle electricity during a future receipt period, it is a forward transaction. In particular, in this power trading system, since the first user can freely set the power supply period, there may be a case where the profit and loss are not determined at the settlement period. In this case, hedge accounting, which is an accounting process that defers the accounting process until the profit and loss are determined, must be performed. The server device 1 distributes information related to this hedge accounting processing (such as specific accounting processing procedures) to the first terminal 2 and the second terminal 3. Thereby, the first user and the second user can perform appropriate accounting processing.

[0088] Also, the information regarding accounting processing may be information regarding the accounting processing of environmental value. When the first user sells electricity generated from renewable energy and meets certain conditions, the second user can obtain environmental values such as "green power certificates", "J-credits", and "non-fossil certificates". This environmental value is the subject of commercial transactions and has a monetary value. Therefore, when the second user conducts accounting processing, it is necessary to record the environmental value. The server device 1 may distribute information regarding the accounting processing of this environmental value (such as specific accounting processing procedures) to the first terminal 2 and the second terminal 3.

[0089] In the above embodiment, the case where the first user and the second user conduct a one-on-one power transaction is taken as an example. However, one first user and a plurality of second users may conduct a power transaction, or a plurality of first users and one second user may conduct a power transaction, or a plurality of first users and a plurality of second users may conduct a power transaction.

[0090] Specifically, when one first user and a plurality of second users conduct a power transaction, for example, if the contract electricity quantity among the electricity selling conditions (or electricity buying conditions) presented by the one first user is 10,000 kWh, one of the second users may apply for 3,000 kWh and another one of the second users may apply for 7,000 kWh, so that the two second users can jointly meet the contract electricity quantity of the electricity selling conditions (or electricity buying conditions) by the first user. Here, in this modification example, the electricity selling conditions or electricity buying conditions may further include a contract term. In this case, for example, for the electricity selling conditions (or electricity buying conditions) with a certain contract term presented by one first user, even if some of the second users select a part of the conditions, if all of the electricity selling conditions (or electricity buying conditions) are not satisfied by other second users by the end of the contract term, the applications made by the second users who made the partial selection may be invalidated after the expiration of the contract term.

[0091] In addition, when a plurality of first users and one second user conduct a power transaction, for example, the plurality of first users may jointly present one power selling condition (or power buying condition), and one second user may apply for the power selling condition to conclude the power transaction. In this case, the power selling condition or power buying condition may further include a contract term.

[0092] In addition, when a plurality of first users and a plurality of second users conduct a power transaction, for example, the plurality of first users jointly present a power selling condition (or power buying condition). If the contract power quantity in the presented power selling condition is 10,000 kWh, one of the second users may apply for 3,000 kWh, and another one of the second users may apply for 7,000 kWh. In this way, the two second users may jointly satisfy the contract power quantity of the power selling condition (or power buying condition) presented by the first users. In this case, for example, when some of the second users select part of the power selling condition (or power buying condition) with a certain contract term presented by the plurality of first users, if all of the power selling condition (or power buying condition) is not satisfied by other second users by the contract term, the application made by the second users who made the partial selection may be invalid after the expiration of the contract term.

[0093] In addition, although the server device 1 manages information related to power selling conditions (or power buying conditions) and transaction conclusion by a power selling condition DB (or power buying condition DB) and a transaction conclusion DB, it is not limited thereto. For example, distributed ledger technology such as blockchain may be used to manage information related to power selling conditions (or power buying conditions) and transaction conclusion by a plurality of storage devices. In this case, the plurality of storage devices may be included in each of the server device 1, the first terminal 2, the second terminal 3, and other terminal devices. For example, when one terminal generates a transaction according to a smart contract, when other terminals reach an agreement according to a consensus algorithm, the transaction is recorded in a blockchain (distributed ledger). Thereby, it is possible to prevent information tampering and ensure information traceability.

[0094] In addition, the server device 1 may be provided with a function of changing the selling electricity conditions (or purchasing electricity conditions) stored in the selling electricity conditions DB (or purchasing electricity conditions DB) according to the information received from the first terminal 2. That is, the first user may be able to change the selling electricity conditions input to the first terminal 2 retrospectively. In this case, among the information included in the selling electricity conditions, some information (for example, electricity price, power supply period, etc.) may be made unchangeable. Further, the second user may be configured to be able to operate the second terminal 3 to request the first user to change the information that can be changed among the selling electricity conditions. Thereby, since the second user can negotiate with the first user, it becomes easier to conclude an electricity transaction.

[0095] The power trading system according to the present embodiment may be linked with a credit card settlement system, an account transfer system, or the like. In this case, for example, a communication terminal (such as a mobile phone or a PC) of a consumer (a person who receives power supply from a retail electricity business operator) may receive settlement information such as the credit card number and account number of the consumer, and register the settlement information in the credit card settlement system or the account transfer system. Thereby, the power trading system can manage the settlement information of the user.

[0096] Further, the server device 1 of the power trading system according to the present embodiment may be provided with a function of detecting information related to a credit card from an image of the credit card taken. For example, the server device 1 is configured to be communicable with a communication terminal (such as a mobile phone or a PC) of the user and a credit card settlement system. The server device 1 receives an image of the user's credit card from the communication terminal of the user, and reads information such as the user's credit card number from the received image by a character reading technique such as OCR (Optical Character Recognition), and notifies the credit card settlement system of the information. Thereby, the trouble of inputting settlement information can be saved.

[0097] Further, the power trading system according to the present embodiment may be linked with a customer management system that manages various information used to bill a user's electricity bill, such as the user's name, address, phone number, and electricity consumption. Thereby, for example, it is possible to bill the user for the electricity bill according to the electricity consumption.

[0098] Also, the server device 1 may be a plurality of devices or may be one device. One server device may be provided for each function of the server device 1. Further, each function of the server device 1 may be realized jointly by a plurality of devices.

Industrial Applicability

[0099] The power trading system according to the present embodiment can mediate the power trading between the first user and the second user in order to establish a power trading based on the input of the power selling conditions received from the first user by the first terminal and the selection received from the second user by the second terminal.

Explanation of Signs

[0100] 1 Server device 12 Storage unit 13 Control unit 131 First screen processing unit 132 Condition registration unit 133 Second screen processing unit 134 Transaction establishment processing unit 2 First terminal 3 Second terminal

Claims

1. A power trading system that mediates power transactions between a first user who sells electricity and a second user who buys electricity, A first terminal that receives input from the first user regarding the conditions for selling electricity, which are the conditions for selling electricity to be presented to the second user, A server device that receives power sales condition information indicating the power sales conditions received by the first terminal from the first terminal and stores the received power sales condition information in a storage unit, A second terminal that receives the power sales conditions information from the server device, displays the received power sales conditions information on a display unit, and accepts the selection of the first user or the power sales conditions from the second user. Equipped with, The aforementioned electricity sales conditions include information regarding the electricity transaction price and supply period in the event that the electricity transaction is concluded, as well as the type of power generation equipment that will supply electricity in the event that the electricity transaction is concluded. The server device is a power trading system that distributes the type of power generation equipment to the second terminal.

2. A power trading system that mediates power transactions between a first user who sells electricity and a second user who buys electricity, A first terminal that receives input from the first user regarding the conditions for selling electricity, which are the conditions for selling electricity to be presented to the second user, A server device that receives power sales condition information indicating the power sales conditions received by the first terminal from the first terminal and stores the received power sales condition information in a storage unit, A second terminal that receives the power sales conditions information from the server device, displays the received power sales conditions information on a display unit, and accepts the selection of the first user or the power sales conditions from the second user. Equipped with, The aforementioned electricity sales conditions include information regarding the electricity transaction price and the power supply period in the event that the electricity transaction is concluded. The memory unit stores credit information indicating the creditworthiness of the second user in commercial transactions. The server device is a power trading system that distributes the credit information to the first terminal.

3. In the electricity trading system according to claim 1 or 2, A power trading system in which the power supply period includes periods measured in hours or days.

4. A power trading system that mediates power transactions between a first user who purchases electricity and a second user who sells electricity, A first terminal that receives the electricity purchase conditions, which are the conditions for purchasing electricity to be presented to the second user, from the first user, A server device that receives power purchase condition information indicating the power purchase conditions received by the first terminal from the first terminal and stores the received power purchase condition information in a storage unit, A second terminal that receives the power purchase condition information from the server device, displays the received power purchase condition information on a display unit, and accepts the selection of the first user or the power purchase condition from the second user, Equipped with, The aforementioned electricity purchase conditions include information regarding the electricity transaction price and supply period if the electricity transaction is concluded, as well as the type of power generation equipment that the party wishes to receive electricity from if the electricity transaction is concluded. The server device is a power trading system that distributes the type of power generation equipment to the second terminal.

5. A method of electricity trading that mediates electricity transactions between a first user who sells electricity and a second user who buys electricity, The first terminal receives input from the first user, which is the power sales conditions that will be presented to the second user, The server device receives power sales condition information indicating the power sales conditions received by the first terminal from the first terminal, and stores the received power sales condition information in the storage unit. The second terminal receives the power sales condition information from the server device, displays the received power sales condition information on the display unit, and accepts the selection of the first user or the power sales condition from the second user. Equipped with, The aforementioned electricity sales conditions include information regarding the electricity transaction price and supply period in the event that the electricity transaction is concluded, as well as the type of power generation equipment that will supply electricity in the event that the electricity transaction is concluded. The server device distributes the type of power generation equipment to the second terminal in a power trading method.

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