JP7091277B2 - Contract price determination device and contract price determination method - Google Patents

Description

The present invention relates to a contract price determination device and a contract price determination method for determining a contract price when buying and selling electric power.

Conventionally, a market for buying and selling electric power generated by photovoltaic power generation facilities has been formed. In Patent Document 1, information on the amount of electric power that can be purchased and the desired electric power purchase price is acquired from the electric power buyer, information on the desired electric power sales amount and the desired electric power selling price is acquired from the electric power seller, and based on the acquired information, the information is obtained. A method of matching in a form that meets the needs of both parties is disclosed.

JP-A-2017-153274

In a system using a conventional method, a contract price is determined and a sale is completed when both the seller and the buyer's demands are satisfied. On the other hand, the seller and the buyer whose contract price has not been determined purchase electricity at a price significantly higher than the desired electricity purchase price with an electric power retailer such as an electric power company, and also purchase electricity at a price significantly higher than the desired electricity purchase price. It is necessary to sell electricity at a significantly lower price.

By the way, the seller and the buyer's household may be provided with a storage battery capable of storing the generated electric power and the purchased electric power. When the storage battery has free capacity, the seller and the buyer have a margin before the timing when the power is actually sold and purchased. However, in the conventional system, since the contract price is determined as soon as the seller and the buyer make a request, it is not possible to consider the margin until the timing when the power sale and the power purchase are required. By considering such a margin, it is possible that the amount of electric power that needs to be purchased and sold with the electric power retailer can be reduced as a whole for the seller and the buyer, and the profit of the seller and the buyer can be reduced. There was room for improvement.

Therefore, the present invention has been made in view of these points, and an object of the present invention is to provide a contract price determination device and a contract price determination method that can increase the profits of electric power buyers and sellers.

The contract price determining device according to the first aspect of the present invention is a bid to acquire a desired power purchase price from a plurality of desired power sellers and to acquire a desired power sale price from a plurality of desired power sellers at a predetermined timing. The price acquisition unit and the urgency acquisition unit that acquires the urgency corresponding to the spare time until the time when the desired power purchaser needs to buy power or the spare time until the time when the desired power seller needs to sell power. Of the plurality of desired power purchase prices and the plurality of desired power sales prices, one or more of the desired power purchase prices whose desired power purchase price is higher than the desired power sales price and the desired power sales price. The first decision unit that determines the first contract result including the first contract price calculated based on the desired power purchase price and the desired power sale price included in the combination, the degree of urgency, and the said item included in the combination. The total value of the second decision unit that determines the second contract result including the second contract price calculated based on the desired power purchase price and the desired power sale price, and the first power amount contracted at the first contract price. And the contract result selection unit that determines whether to adopt the first contract result or the second contract result by comparing with the total value of the second power amount contracted at the second contract price. Has.

When the contract result selection unit decides to adopt the second contract result, the second contract of the desired power purchaser and the desired power seller whose second power amount is larger than the first power amount. The price is stored in the storage unit as a hold price, and at a timing after the predetermined timing, the first determination unit or the second determination unit has the second power amount smaller than the first power amount. The third contract price is calculated based on the desired power purchase price or the desired power sale price of the desired power purchaser or the desired power seller, and the contract price determining device has the third contract price and the hold price. By comparing with, either the third contract price or the reserved price is used as the contract result of the desired power purchaser or the desired power seller whose second power amount is larger than the first power amount. It may further have a holding price fixing unit to be fixed.

When the third contract price related to the desired power sale price of the desired power seller is equal to or higher than the hold price, the hold price determination unit determines the hold price as the contract result and determines the desired power sale. When the third contract price related to the desired electricity selling price of the person is less than the hold price, the third contract price may be determined as the contract result.

When the third contracted price related to the desired power purchase price of the desired power purchaser is less than the reserved price, the reserved price determination unit determines the reserved price as the contracted result and determines the desired power purchase. When the third contract price related to the desired power purchase price of the person is equal to or higher than the hold price, the third contract price may be determined as the contract result.

At a timing after the predetermined timing, the first determination unit and the second determination unit indicate that the desired power purchaser and the desired power seller whose second power amount is smaller than the first power amount. If the contract cannot be executed based on the desired power purchase price and the desired power sale price, the hold price determination unit sets the price for purchasing and selling power with the retail electric power company as the contract result. It may be confirmed.

The contract result selection unit determines that the first contract result is adopted when the total value of the first electric energy is larger than the total value of the second electric energy, and the total value of the first electric energy is the first. It may be decided to adopt the second contract result when it is equal to or less than the total value of the two electric energy amounts.

The second determination unit arranges a plurality of the desired power purchase prices in ascending order of the urgency, and if the urgency is the same, the desired power purchase prices are arranged in the order of the largest, and the plurality of desired power sales prices are listed. By arranging the desired power selling prices in ascending order and, if the urgency is the same, the desired power selling prices in ascending order, and associating the plurality of the desired power purchase prices and the plurality of the desired power selling prices in the order in which they are arranged. 2 The contract price may be calculated.

The first determination unit arranges a plurality of the desired power purchase prices in descending order of the desired power purchase price, and arranges the plurality of the desired power sales prices in ascending order of the desired power purchase price, and arranges the plurality of the desired power purchase prices in ascending order. The first contract price may be calculated by associating the price and the plurality of desired electricity selling prices in the order in which they are arranged.

The method for determining the contract price according to the second aspect of the present invention includes a step of acquiring a desired power purchase price from a plurality of desired power purchasers at a predetermined timing executed by a computer, and a desired power sale at the predetermined timing. Corresponds to the step of acquiring the price from a plurality of desired power sellers and the spare time until the time when the desired power purchaser needs to buy power or the spare time until the time when the desired power seller needs to sell power. The step of acquiring the degree of urgency, and one or more of the desired power purchase prices and the plurality of desired power sales prices whose desired power purchase price is higher than the desired power sales price and the said The first contract including the desired power purchase price included in the combination with the desired power sale price, the first contract price calculated based on the desired power sale price, and the first power amount contracted at the first contract price. The step to determine the result, the second contract price calculated based on the urgency, the desired power purchase price and the desired power sale price included in the combination, and the second power contracted at the second contract price. By comparing the step of determining the second contract result including the amount with the total value of the first power amount and the total value of the second power amount, the first contract result and the second contract result It has a step to decide which one to adopt.

According to the present invention, there is an effect that the profits of the buyer and the seller of electric power can be increased.

It is a figure for demonstrating the outline of the contract price determination apparatus. It is a figure which shows the relationship between the contract price determination device, a buyer and a seller. It is a figure which shows the structure of the contract price determination device. It is a figure for demonstrating the degree of urgency. It is a figure which shows the bid amount, the bid price and the degree of urgency of a plurality of buyers and a plurality of sellers. It is a figure for demonstrating the 1st determination process. It is a figure which shows the 1st execution result determined by the 1st determination process. It is a figure for demonstrating the 2nd determination process. It is a figure which shows the 2nd execution result determined by the 2nd determination process. It is a figure which compares the 1st execution result and the 2nd execution result. It is a figure which shows the contract result which the holding price fixing part is fixed.

[Overview of contract price determination device 1]
The surplus electricity purchase system for photovoltaic power generation (that is, the feed-in tariff system (hereinafter referred to as FIT)) that started in 2009 has promoted the spread of photovoltaic power generation (hereinafter referred to as PV) to general households. Of the PV power (hereinafter referred to as PV power), the power surplus from the household's own consumption (hereinafter referred to as surplus power) is sold at a high price (48 yen / kWh (2009)) to the power company (electric power retailer) by FIT. It was guaranteed to sell electricity at households)) that started FIT in 2014.

However, since the period for which FIT is applied is 10 years, households whose FIT period has expired will begin to appear one after another from 2019. Since the surplus electricity of households whose FIT period has expired will be sold to the electric power company at a low price (about 10 yen / kWh, etc.), it is better for these households to consume their own electricity than to sell it to the electric power company. Conceivable. However, if the surplus power cannot be stored, the surplus power generated during the time when the self-consumption is low can only be sold to the electric power company at a low price.

By introducing storage batteries to households with power generation facilities, it will be possible to store surplus electricity and consume it in-house when needed, and it will be possible to reduce electricity costs by storing surplus electricity and consuming it in-house. However, if the free capacity of the storage battery is insufficient for the amount of power generated by the PV, it is still necessary to sell the power to the electric power company at a low price.

As another expected means in such a case, it is conceivable to carry out power interchange by selling the surplus power of the household to another household. The seller (that is, the desired power seller) sells power to the intermediary company at a price higher than the power selling price to the electric power company (for example, 10 yen / kWh), and the buyer (that is, the desired power purchaser) is the electric power company. If it is possible to purchase electricity from an intermediary company at a price lower than the electricity purchase price from (for example, 30 yen / kWh), both parties can enjoy financial merits. As described above, in order to determine the contract price at which both the seller and the buyer can enjoy the financial merit, the contract price determination device 1 according to the present embodiment is used.

FIG. 1 is a diagram for explaining an outline of the contract price determination device 1. FIG. 1 shows a household that buys electricity as a buyer, a household that sells electricity as a seller, and an electric power company. Further, FIG. 1 shows a contract price determination for determining a contract price when buying and selling electric power between a household who wants to buy power and a household who wants to sell power. Device 1 is shown.

The contract price determination device 1 is, for example, a computer managed by an intermediary company that mediates the sale and purchase of electric power. The contract price determination device 1 determines the contract price between the buyer and the seller, and outputs the contract result.

A household that sells electricity is a household that owns PV and can sell surplus electricity. The power-selling household can select either a method of selling power to the power-buying household via the contract price determination device 1 or a method of selling power directly to the electric power company. In addition, all households can select either a method of purchasing electric power consumed in the house from a household selling electric power via the contract price determining device 1 or a method of purchasing electric power directly from an electric power company. In the present specification, it is assumed that 30 minutes is treated as one frame as the time unit for buying and selling electric power via the contract price determining device 1, and that 48 frames are bought and sold per day. The time unit of one frame is not limited to 30 minutes, and may be any other value. In the following, when expressing a specific timing, it is referred to as a frame i, and the frame next to the frame i is referred to as a frame i + 1.

In general, buyers want to buy power at the lowest possible price, and sellers want to sell power at the highest possible price. Therefore, since supply and demand do not match in many cases, the contract price determining device 1 needs to match the buyer and the seller. In this specification, the power purchase price desired by the buyer is referred to as the desired power purchase price, and the power sale price desired by the seller is referred to as the desired power sale price. The amount of power purchased by the buyer is called the desired amount of power purchased, and the amount of power sold by the seller is called the desired amount of power sold. In the following, the desired power purchase price and the desired power sale price are collectively referred to as the bid price, and the desired power purchase amount and the desired power sale amount are collectively referred to as the bid amount.

When there are a large number of buyers and a large number of sellers, there may be a combination of the desired power selling price and the desired power buying price higher than the desired power selling price. In such a case, the contract price determination device 1 determines a price higher than the desired power selling price as the contract price for the seller (hereinafter referred to as the contract price for selling power), and contracts the buyer with a price lower than the desired power purchase price. By determining the price (hereinafter referred to as the contract price for purchasing electricity), it is possible to provide economic benefits to the seller and the buyer. In this specification, the contract price for selling electricity and the contract price for purchasing electricity are collectively referred to as the contract price.

As will be described later, the contract price determining device 1 uses the desired selling price and the desired buying price, as well as the urgency corresponding to the spare time until the time when the buying and selling of power is necessary for the buyer and the seller. , Determine the contract price. Thereby, the contract price determining device 1 can increase the contracted amount as a whole of the buyer and the seller, and increase the profit of the buyer and the seller.

FIG. 2 is a diagram showing the relationship between the contract price determination device 1 and the buyer and the seller. The contract price determining device 1 includes a plurality of buyer terminals 2 (buyer terminals 2-1 in FIG. 2, buyer terminals 2-2, ...) Used by a plurality of buyers, and a plurality of seller terminals used by a plurality of sellers. Communication with 3 (seller terminal 3-1 in FIG. 2, seller terminal 3-2, ...). The buyer terminal 2 and the seller terminal 3 may be any terminal as long as they have an operation unit for inputting information by the user and a display unit for displaying information, and may be, for example, a smartphone or a computer.

The contract price determining device 1 acquires the desired power purchase price from each of the plurality of buyer terminals 2, and acquires the desired power sale price from each of the plurality of seller terminals 3. The contract price determination device 1 determines contract prices for a plurality of buyers and a plurality of sellers based on the acquired plurality of desired power purchase prices and a plurality of desired power sales prices, and the plurality of buyer terminals 2 and the plurality of seller terminals. Notify 3 of the contract price.

[Configuration of contract price determination device 1]
FIG. 3 is a diagram showing the configuration of the contract price determination device 1. In FIG. 3, the arrows indicate the main data flows, and there may be data flows other than those shown in FIG. In FIG. 3, each block shows not a hardware (device) unit configuration but a functional unit configuration. Therefore, the block shown in FIG. 3 may be mounted in a single device, or may be mounted separately in a plurality of devices. Data can be exchanged between blocks via any means such as a data bus, a network, and a portable storage medium.

The contract price determination device 1 includes a communication unit 11, a storage unit 12, and a control unit 13. The control unit 13 has a bid price acquisition unit 131, an urgency acquisition unit 132, a first determination unit 133, a second determination unit 134, a contract result selection unit 135, and a hold price determination unit 136.

The communication unit 11 is a communication interface for transmitting / receiving data to / from the buyer terminal 2 and the seller terminal 3 via a network, and has, for example, a LAN (Local Area Network) controller. The communication unit 11 receives information from the buyer terminal 2 and the seller terminal 3, and notifies the control unit 13 of the received information. Further, the communication unit 11 transmits the information output by the control unit 13 to the buyer terminal 2 and the seller terminal 3.

The storage unit 12 is a storage medium such as a ROM (Read Only Memory), a RAM (Random Access Memory), and a hard disk drive. The storage unit 12 stores a program executed by the control unit 13.

The control unit 13 is, for example, a processor such as a CPU (Central Processing Unit), and by executing a program stored in the storage unit 12, the bid price acquisition unit 131, the risk acquisition unit 132, the first determination unit 133, and the like. It functions as a second determination unit 134, a contract result selection unit 135, and a hold price determination unit 136.

The contract price determination device 1 according to the present embodiment is not limited to the specific configuration shown in FIG. The contract price determination device 1 may be configured by connecting two or more physically separated devices by wire or wirelessly.

[Explanation of contract price determination process]
The process of determining the contract price by the contract price determination device 1 will be described in detail. In the following, the contract price determination device 1 executes the calculation of the contract price for the bid for buying and selling power at one specific timing of the electricity market transaction (that is, coma i). The procedure of the determination process will be described.

The contract price determination device 1 acquires the selling price of electric power (for example, the selling price to the electric power company and the buying price from the electric power company) outside the trading market before performing the contract price determination processing, and the acquired buying and selling price. The price is stored in the storage unit 12. The contract price determination device 1 may acquire the trading price by manual operation, or may automatically acquire the trading price from a website that discloses the external trading price.

The buyer and the seller make a bid for power purchase and a bid for power sale through the buyer terminal 2 and the seller terminal 3, respectively. The buyer terminal 2 and the seller terminal 3 each calculate the degree of urgency before bidding. The degree of urgency is a value corresponding to the spare time until the time when the buyer needs to buy power or the spare time until the time when the desired power seller needs to sell power. The degree of urgency is a value of 0 or more, and the smaller the value, the more urgently it is necessary to buy or sell power, and the larger the value, the more room there is until it is necessary to buy or sell power. Is shown. Households that do not have storage batteries need to buy or sell power each time they run out of power or have surplus power, so the degree of urgency is always zero.

FIG. 4 is a diagram for explaining the degree of urgency. FIG. 4 shows the amount of power generation, the amount of consumption, and the free capacity of the storage battery for each frame for each of the sellers A, B, C, D, and E. The seller is about to bid on the frame i.

The power generation amount for each frame is a predicted value of the power generation amount by PV, and is calculated based on information such as past history and weather forecast by, for example, a known PV power generation prediction method. The consumption amount for each frame is a predicted value of in-house power consumption, and is based on information such as past history, weather forecast, buyer and seller schedule, buyer and seller position information, etc. by a known in-house power consumption prediction method. Is calculated. The free capacity for each frame is a value obtained by subtracting the amount of power generation for each frame and then adding the consumption amount for each frame to the current free capacity of the storage battery. If it is predicted that the free capacity of the storage battery will be insufficient (that is, the storage battery cannot store any more) in a certain frame, the free capacity of the storage battery will be a negative value. Since sellers A and C do not have a storage battery, the free capacity of the storage battery is not shown.

The seller terminal 3 automatically determines the degree of danger of each seller based on the free capacity of the storage battery. In the example shown in FIG. 4, the seller B needs to sell power because the free capacity of the storage battery is insufficient in the coma i + 2. Therefore, the seller terminal 3 sets the number of frames (that is, spare time) of the seller B from the frame in which the bid is made to the frame (that is, the time) at which the remaining capacity of the storage battery first becomes a negative value (that is, the time). , Determined as the risk of seller B.

Further, the seller E needs to sell the power because the free capacity of the storage battery is insufficient in the frame i + 1. Therefore, the seller terminal 3 determines 1 as the risk of the seller E, which is the number of frames from the frame in which the bid is made to the frame in which the remaining capacity of the storage battery first becomes a negative value.

The seller terminal 3 cannot store the electric power generated by the PV for the sellers A and C who do not have the storage battery, and the seller D whose remaining capacity of the storage battery is a negative value in the coma i, so the degree of urgency is 0. To decide.

FIG. 4 shows a method in which the seller terminal 3 determines the risk of power sale, but the buyer terminal 3 also determines the risk of power purchase. However, the buyer terminal 2 determines the degree of danger of purchasing power based on the remaining capacity of the storage battery instead of the free capacity of the storage battery. That is, the buyer terminal 2 determines the number of frames from the frame in which the bid is made to the frame in which the remaining capacity of the storage battery becomes a negative value as the risk of power purchase.

The buyer terminal 2 and the seller terminal 3 may determine the degree of urgency based on the schedule and life pattern of the buyer and the seller. For example, when the buyer plans to use a dishwasher or an electric vehicle, the buyer terminal 2 purchases the required amount of electric power before the scheduled use time (frame) and stores it in the storage battery. , Determine the degree of urgency. Further, the seller terminal 3 is a time (frame) to be used when the electric vehicle is scheduled to be used and more electric power is stored in the storage battery than the amount required for the planned use. Determine the degree of urgency to sell the extra amount of power from the storage battery before.

Further, the buyer terminal 2 and the seller terminal 3 may accept input of the degree of urgency by the buyer and the seller. In this case, the buyer and the seller set the degree of urgency using the operation unit of the buyer terminal 2 and the seller terminal 3.

After the buyer terminal 2 and the seller terminal 3 determine the degree of urgency, the seller inputs information on the desired power selling price (yen / kWh) and the desired power selling amount (kWh) into the seller terminal 3 and makes a bid for selling power. Further, the buyer inputs the information of the desired power purchase price (yen / kWh) and the desired power purchase amount (kWh) into the buyer terminal 2 and makes a bid for power purchase. In this embodiment, it is assumed that the buyers A, B, C, D and the sellers A, B, C, D, E participate in the bidding.

FIG. 5 is a diagram showing bid volumes, bid prices, and urgency of a plurality of buyers and a plurality of sellers. In the example shown in FIG. 5, for example, the desired power purchase price of the buyer A is 25 yen / kWh, and the desired power purchase amount is 2 kWh. The desired electricity selling price of the seller A is 12 yen / kWh, and the desired electricity selling amount is 2 kWh. Further, the degree of danger of seller B is 2, the degree of danger of seller E is 1, and the other degree of danger is 0. In the example shown in FIG. 5, the risk of power purchase is all 0, but the risk of power purchase may be 1 or more.

The bid price acquisition unit 131 acquires the desired power purchase price and the desired power purchase amount from the plurality of buyer terminals 2 at the timing when the bid deadline time of a specific frame (frame i) is reached, and requests from the plurality of seller terminals 3. Obtain the selling price and the desired selling amount. The bid price acquisition unit 131 stores the acquired bid price and bid amount in the storage unit 12. Further, the urgency acquisition unit 132 acquires the urgency of power purchase from the plurality of buyer terminals 2, and also acquires the urgency of power sale from the plurality of seller terminals 3. The danger level acquisition unit 132 stores the acquired danger level in the storage unit 12.

The first determination unit 133 and the second determination unit 134 determine the contract price using the information stored in the storage unit 12 by executing the first determination process and the second determination process described below, respectively. The first determination process and the second determination process may be performed in any order, or may be executed in parallel.

[First determination process of contract price]
In the first determination process, the first determination unit 133 considers one or more desired power purchase prices whose desired power purchase price is higher than the desired power sales price among the plurality of desired power purchase prices and the plurality of desired power sales prices. The first contract result including the desired purchase price included in the combination with the power selling price and the first contract price calculated based on the desired power selling price is determined. That is, the first determination process determines the first contract result based on the desired power purchase price and the desired power sale price without using the degree of urgency. For example, the first determination unit 133 determines the contract price by using a conventional blind single price auction.

FIG. 6 is a diagram for explaining the first determination process. The horizontal axis of FIG. 6 represents the bid amount, and the vertical axis represents the bid price. The first determination unit 133 arranges a plurality of desired power purchase prices in descending order of the desired power purchase price, and arranges a plurality of desired power sales prices in ascending order of the desired power sales price. Then, the first determination unit 133 calculates the first contract price by associating the plurality of desired power purchase prices and the plurality of desired power sales prices in the order in which they are arranged.

Specifically, as shown in FIG. 6, the first determination unit 133 includes a line in which lines indicating the desired power purchase prices of a plurality of buyers are arranged in descending order of the desired power purchase prices, and a line in which the desired power sales of the plurality of sellers are arranged in descending order. The intersection of the lines indicating the prices with the lines in which the desired selling prices are arranged in ascending order is the contract point. The vertical position of the line corresponds to the bid price, and the length of the line corresponds to the bid amount. Then, the first determination unit 133 determines the price corresponding to the contract point as the first contract price for the bid to the left of the contract point. In the case of the example shown in FIG. 6, the first determination unit 133 determines the first contract price to be 17 yen / kWh and the first electric energy to be contracted at the first contract price to 6 kWh.

The first determination unit 133 stores the first execution result including the determined first execution price and the first electric energy executed at the first execution price in association with the identification information of each of the plurality of buyers and the plurality of sellers. Store in part 12.

FIG. 7 is a diagram showing the first execution result determined by the first determination process. FIG. 7 shows, for each of the plurality of buyers and the plurality of sellers, the first contracted quantity and the first contracted price included in the first contracted result, and the non-contracted quantity obtained by subtracting the first contracted quantity from the bid amount. In the example shown in FIG. 7, the bid volume of all or part of the buyers A, B, C and the sellers A, B, C is executed, and the bid volume of the buyer D and the sellers D, E is not executed. rice field.

[Second decision processing of contract price]
In the second decision process, the second decision unit 134 determines one or more desired power purchases in which the desired power purchase price is higher than the desired power sale price among the urgency and the plurality of desired power purchase prices and the plurality of desired power sale prices. The second contract result including the second contract price calculated based on the desired power purchase price and the desired power sale price included in the combination of the electricity price and the desired power sale price is determined. That is, the second determination process determines the second contract result based on the degree of urgency in addition to the desired power purchase price and the desired power sale price.

FIG. 8 is a diagram for explaining the second determination process. The horizontal axis of FIG. 8 represents the bid amount, and the vertical axis represents the bid price. The second determination unit 134 arranges a plurality of desired electricity purchase prices in ascending order of urgency, and if the urgency is the same, arranges a plurality of desired electricity purchase prices in descending order of urgency, and arranges a plurality of desired electricity selling prices in ascending order of urgency. If the urgency is the same, arrange them in ascending order of the desired selling price. Then, the second determination unit 134 calculates the second contract price by associating the plurality of desired power purchase prices and the plurality of desired power sales prices in the order in which they are arranged.

Specifically, as shown in FIG. 8, the second determination unit 134 arranges lines indicating the desired power purchase prices of a plurality of buyers in ascending order of urgency, and when the urgency is the same, the desired power purchase price is the same. The intersection of the lines arranged in descending order and the lines indicating the desired selling prices of multiple sellers in ascending order of urgency, and the lines arranging in ascending order of desired selling prices when the vulnerableness is the same is the contract point. do. The vertical position of the line corresponds to the bid price, and the length of the line corresponds to the bid amount. Compared with FIG. 6, in FIG. 8, the order of sellers B and E having a urgency of 1 or more is changed to the rear (that is, postponed). Then, the second determination unit 134 determines the price corresponding to the contract point as the second contract price for the bid to the left of the contract point. In the case of the example shown in FIG. 8, the second determination unit 134 determines the second contract price to be 18 yen / kWh and the second electric energy to be contracted at the second contract price to 6 kWh.

The second determination unit 134 stores the second execution result including the determined second execution price and the second electric energy executed at the second execution price in association with the identification information of each of the plurality of buyers and the plurality of sellers. Store in part 12.

FIG. 9 is a diagram showing the second execution result determined by the second determination process. FIG. 9 shows, for each of the plurality of buyers and the plurality of sellers, the second contracted quantity and the second contracted price included in the second contracted result, and the non-contracted quantity obtained by subtracting the second contracted quantity from the bid amount. In the example shown in FIG. 9, all bids were executed for buyers A, B, C and sellers A, C, and D, and all bids were not executed for buyer D and sellers B, E. Compared to FIG. 7, in FIG. 9, the approximately quantitative value of the seller B having a high degree of urgency decreases, and instead, the approximate quantification of the sellers C and D having a low degree of urgency increases.

In this way, the second decision unit 134 puts off the execution of the buyer and the seller who have a high degree of urgency, that is, who can afford to buy and sell power by the time when it is necessary. On the other hand, the second determination unit 134 preferentially contracts the buyer and the seller who need to buy and sell the power immediately because the degree of danger is low, that is, the storage battery is not provided or the free capacity of the storage battery is low. It is possible to reduce the amount of electricity that buyers and sellers buy and sell with electricity retailers.

[Selection process of execution result]
After the first determination unit 133 and the second determination unit 134 determine the first execution result and the second execution result, the execution result selection unit 135 determines the total value of the first electric energy included in the first execution result and the second. By comparing with the total value of the second electric energy included in the contract result, it is determined whether to adopt the first contract result or the second contract result.

FIG. 10 is a diagram comparing the first contract result and the second contract result. FIG. 10 shows, for each of the plurality of buyers and the plurality of sellers, the first contracted result (first electric energy), the second contracted result (second electric energy), and the second electric energy to the second. It represents the difference obtained by subtracting 1 electric energy and the contract price.

The contract result selection unit 135 determines that the first contract result is adopted when the total value of the first electric energy is larger than the total value of the second electric energy, and the total value of the first electric energy is the total of the second electric energy. If it is less than or equal to the value, it is decided to adopt the second contract result. In the example shown in FIG. 10, since 6kWh, which is the total value of the first electric energy, is the same as 6kWh, which is the total value of the second electric energy, the execution result selection unit 135 determines to adopt the second execution result. ..

When it is decided to adopt the second contract result, the contract result selection unit 135 holds the second contract price of the buyer or seller whose second power amount is larger than the first power amount as a hold price, and holds the hold price. It is stored in the storage unit 12 together with the approximately fixed amount in. In the example shown in FIG. 10, the second contract price of the sellers C and D is held as the hold price in the frame i. The holding price is finally fixed in the holding price fixing process by the holding price fixing unit 136, which will be described later. In FIG. 10, in the column of the contract price of the sellers C and D, 10 yen / kWh to 18 yen / kWh, which is a range that can be taken in the holding price determination process, is shown. The lower limit of the range, 10 yen / kWh, is the selling price to the electric power company, and the upper limit of the range, 18 yen / kWh, is the second contract price.

Further, the contract result selection unit 135 stores the contract price (second contract price) of the buyer or seller whose second power amount is the same as the first power amount and the contract amount at the contract price as the final contract result. It is stored in the unit 12 and transmitted to the buyer terminal 2 and the seller terminal 3 via the communication unit 11. In the example shown in FIG. 10, for buyers A, B, C and seller A, the contract price column shows the second contract price of 18 yen / kWh as a final contract result.

In the example of FIG. 10, the seller B adopts the second contract result instead of the first contract result because the second power amount is smaller than the first power amount. Is in a state of loss due to a decrease in power. On the other hand, the holding price fixing process by the holding price fixing unit 136, which will be described later, guarantees the seller B at least the second contract price of the coma i for the decrease in the contracted amount, so that the second contract result is obtained. The adoption will eventually prevent seller B from losing money.

On the other hand, when the total value of the first electric energy is larger than the total value of the second electric energy, the contract result selection unit 135 determines to adopt the first contract result. In this case, the contract result selection unit 135 sets the contract price (first contract price) of all buyers and sellers and the contract amount at the contract price as the final contract result without holding the contract price. It is stored in the storage unit 12 and transmitted to the buyer terminal 2 and the seller terminal 3 via the communication unit 11. The holding price fixing unit 136 does not perform the holding price fixing process. As a result, the contract result selection unit 135 selects the contract result in consideration of the urgency only when the contract quantification does not decrease as a whole. Therefore, considering the urgency does not cause a disadvantage to the buyer and the seller as a whole. Can be done.

[Holding price confirmation process]
Bidding by a buyer or seller (seller B in FIG. 10) whose approximately quantitative value has decreased due to the selection process of the contract result selection unit 135 at a certain timing (frame i) continues even at a timing after that timing (frame i + 1 or later). The contract calculation is performed by the first determination unit 133 and the second determination unit. Specifically, the buyer or seller whose approximate fixed amount has decreased in the frame i will continue to use the bid amount and the bid price in the frame i and the urgency of subtracting 1 for each frame advance, even after the frame i + 1. It is considered to have been bid. That is, since the risk level of the frame i of the seller B is 2, the risk level of the frame i + 1 is 1, and the risk level of the frame i + 2 is 0. If the bid is not executed in the frame whose urgency is 0, the continued bid is determined to have not been executed in the frame, and is not continued in the subsequent frames.

The first decision unit 133 and the second decision unit 134 perform the above-mentioned first decision process and second decision process together with the continued bid and the bid newly received in the frame i + 1. Then, the contract result selection unit 135 selects the contract price calculated by the first determination unit 133 or the second determination unit by the above-mentioned selection process. If the bid is not executed even in the frame i + 1, the continued bid is repeatedly continued to the next frame until the urgency becomes 0.

The holding price fixing unit 136 is based on the desired power purchase price or the desired power sale price of the continuous bid by the first decision unit 133 or the second decision unit 134 when the continuous bid is executed in the frame i + 1 or later. The calculated contract price (third contract price) and the third electric energy contracted at the third contract price are acquired.

11 (a) to 11 (c) are diagrams showing the contract results for which the reserved price determination unit 136 is determined. 11 (a) to 11 (c) show the difference between the buyer and the plurality of sellers related to the continuous bid and the holding price, obtained by subtracting the first electric energy from the second electric energy in the coma i, and the coma i. It represents the range in which the contract price can be taken, the contract price (third contract price) of the bids continued after the coma i + 1, and the fixed contract price fixed by the holding price fixing unit 136.

FIG. 11A shows the contract result that the hold price fixing unit 136 decides when the third contract price is equal to or higher than the hold price. FIG. 11B shows the contract result that the hold price fixing unit 136 decides when the third contract price is less than the hold price. The holding price fixing unit 136 determines either the third contract price or the holding price by comparing the third contract price acquired in the frame i + 1 or later with the holding price held in the frame i. It is determined as a contract result of the buyer or the seller (that is, the buyer or the seller whose second electric energy is larger than the first electric energy in the frame i). In response to this, the hold price determination unit 136 sets either the third contract price or the hold price as the buyer or seller involved in the continued bidding (that is, the second electric energy is higher than the first electric energy in the coma i). It is confirmed as a contract result of the small buyer or seller).

More specifically, regarding the third contract price and the hold price related to the seller's desired selling price, the hold price determination unit 136 relates the hold price to the hold price when the third contract price is equal to or more than the hold price. It is finalized as the seller's contract result, and the third contract price is finalized as the seller's contract result for the continued bid. On the other hand, the holding price fixing unit 136 determines the third contract price as the contract result of the seller related to the holding price when the third contract price is less than the holding price, and the seller related to the bid for which the holding price is continued. Confirmed as a contract result. As a result, the seller involved in the continued bidding can obtain the higher contract price of the third contract price and the hold price.

Further, regarding the third contract price and the hold price related to the buyer's desired electricity purchase price, the hold price determination unit 136 determines the hold price as the buyer's contract result related to the hold price when the third contract price is less than the hold price. And the third contract price is confirmed as the contract result of the buyer related to the continued bid. On the other hand, the holding price fixing unit 136 determines the third contract price as the contract result of the buyer related to the holding price when the third contract price is equal to or higher than the holding price, and the buyer related to the bid for which the holding price is continued. Confirmed as a contract result. As a result, the buyer involved in the continued bidding can obtain the contract price of the third contract price and the reserved price, whichever is cheaper.

In the example shown in FIG. 11A, the bid of the seller B is executed at 20 yen / kWh, which is the third contract price higher than the hold price of 18 yen / kWh in the frame i + 1 or later. Therefore, the hold price determination unit 136 determines the contract price of sellers C and D related to the hold price as the hold price of 18 yen / kWh, and sets the contract price of seller B related to the continued bid at the third contract price. It will be confirmed as a certain 20 yen / kWh.

In the example shown in FIG. 11B, the bid of the seller B is executed at 16 yen / kWh, which is the third contract price lower than the pending price of 18 yen / kWh in the frame i + 1 or later. Therefore, the hold price determination unit 136 determines the contract price of sellers C and D related to the hold price as the third contract price of 16 yen / kWh, and sets the contract price of seller B related to the continued bid at the hold price. It will be confirmed as a certain 18 yen / kWh.

As a result, the hold price determination unit 136 executes the contract for the decrease in the contracted amount when the buyer or the seller whose contracted result selection unit 135 has reduced the contracted amount in the later frame in the frame i. The higher of the price (third contract price) and the contract price (holding price) that would have been obtained if the buyer or seller could be contracted with the frame i is provided. Therefore, the buyer or seller whose contract amount has decreased due to the selection process of the contract result selection unit 135 can have an opportunity to contract at a more advantageous contract price while guaranteeing at least the holding price.

On the other hand, the buyer or seller whose amount is increased by the selection process of the contract result selection unit 135 in the frame i is with the electric power company when only the first determination process (for example, the blind single price auction of the conventional method) is performed. When it was necessary to buy or sell power at a price for buying or selling power, it is higher than the price for buying or selling power with an electric power company by performing the second decision processing. You can get either a favorable third contract price or a hold price.

Further, the hold price determination unit 136 is a price for buying or selling power with the electric power company when the continuous bid is not executed even if the urgency becomes 0 after the frame i + 1. The selling price to the electric power company and the buying price from the electric power company) are determined as the contract result of the buyer or the seller related to the holding price. At this time, the holding price fixing unit 136 fixes the holding price as the execution result of the buyer or the seller related to the continued bidding.

FIG. 11 (c) shows the execution result that the holding price determination unit 136 determines when the continuous bid is not executed. In the example shown in FIG. 11 (c), the bid of seller B was not executed even if the degree of danger became 0 after the frame i + 1. Therefore, the hold price determination unit 136 determines the contract price of sellers C and D related to the hold price to be 10 yen / kWh, which is the selling price to the electric power company, and sets the contract price of seller B related to the continued bid to the hold price. It is confirmed that it is 18 yen / kWh.

As a result, the hold price determination unit 136 can reduce the price even if the buyer or seller whose price has decreased due to the selection process of the contract result selection unit 135 in the frame i cannot execute the contract in the frame after that. The contract price (holding price) that would have been obtained if the buyer or seller had been able to contract with the frame i is provided for the reduced amount. Therefore, the buyer or the seller whose contractual amount has decreased due to the selection process of the contract result selection unit 135 does not finally lose.

On the other hand, the hold price determination unit 136 is a price for purchasing or selling power with at least the electric power company for the buyer or seller whose approximately fixed amount has increased due to the selection process of the contract result selection unit 135 in the frame i. Since the contract price is set to, no greater disadvantage is generated as compared with the case where only the first determination process is performed.

The holding price fixing unit 136 stores the fixed contract price and the contracted amount at the contract price in the storage unit 12 as the final contract result, and transmits the fixed contract price to the buyer terminal 2 and the seller terminal 3 via the communication unit 11. ..

[Effect of embodiment]
In the contract price determination device 1 according to the present embodiment, the first determination unit 133 determines the first contract result without using the urgency, and the second determination unit 134 determines the second contract result using the urgency. Then, the contract result selection unit 135 determines whether to adopt the first contract result or the second contract result based on the total value of the contracts. As a result, the contract price determination device 1 reduces the amount of electric power that the buyer and the seller buy and sell the electric power with the electric power retailer by increasing the approximate fixed amount as a whole of the buyer and the seller, and the buyer. And can increase the profit of the seller.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments, and various modifications and changes can be made within the scope of the gist thereof. be. For example, all or part of the device can be functionally or physically distributed / integrated in any unit. Also included in the embodiments of the present invention are new embodiments resulting from any combination of the plurality of embodiments. The effect of the new embodiment produced by the combination has the effect of the original embodiment together.

1 Contract price determination device 11 Communication unit 12 Storage unit 13 Control unit 131 Bid price acquisition unit 132 Vulnerableness acquisition unit 133 1st decision unit 134 2nd decision unit 135 Contract result selection unit 136 Hold price determination unit

Claims (7)

A bid price acquisition unit that acquires the desired power purchase price from multiple desired power purchasers and the desired power sales price from multiple desired power sellers at a predetermined timing.
The urgency acquisition unit that acquires the urgency corresponding to the leeway time until the time when the desired power purchaser needs to buy power or the leeway time until the time when the desired power seller needs to sell power.
Of the plurality of desired power purchase prices and the plurality of desired power sales prices, one or more of the desired power purchase prices whose desired power purchase price is higher than the desired power sales price and the desired power sales price are combined. A first decision unit that determines the first contract result including the first contract price calculated based on the desired power purchase price and the desired power sale price included.
A plurality of the desired power purchase prices are arranged in ascending order of the urgency, and when the urgency is the same, the desired power purchase prices are arranged in descending order, and a plurality of the desired power sales prices are arranged in the order of the urgency. A second calculated by arranging the desired power selling prices in ascending order when the urgency is the same, and associating a plurality of the desired power purchase prices and a plurality of the desired power selling prices in the arranged order. The second decision unit that determines the second contract result including the contract price, and
When the total value of the first electric energy contracted at the first contract price is larger than the total value of the second electric energy contracted at the second contract price, it is determined that the first contract result is adopted, and the first power is used. A contract result selection unit that determines to adopt the second contract result when the total value of the amount is equal to or less than the total value of the second electric energy .
Contract pricing device with. When the contract result selection unit decides to adopt the second contract result, the second contract of the desired power purchaser and the desired power seller whose second power amount is larger than the first power amount. The price is stored in the storage as a hold price,
At a timing after the predetermined timing, the first determination unit or the second determination unit may use the desired power purchaser or the desired power seller whose second power amount is smaller than the first power amount. Calculate the third contract price based on the desired power purchase price or the desired power sale price.
By comparing the third contract price with the hold price, either the third contract price or the hold price can be determined by the desired power purchaser or the desired power purchaser whose second power amount is larger than the first power amount. The contract price determination device according to claim 1, further comprising a hold price determination unit that determines the contract result of the desired power seller. When the third contract price related to the desired power sale price of the desired power seller is equal to or higher than the hold price, the hold price determination unit determines the hold price as the contract result and determines the desired power sale. The contract price determining device according to claim 2, wherein when the third contract price related to the desired selling price of the person is less than the holding price, the third contract price is determined as the contract result. When the third contracted price related to the desired power purchase price of the desired power purchaser is less than the reserved price, the reserved price determination unit determines the reserved price as the contracted result and determines the desired power purchase. The contract price determining device according to claim 2 or 3, wherein when the third contract price related to the desired power purchase price of the person is equal to or more than the hold price, the third contract price is determined as the contract result. At a timing after the predetermined timing, the first determination unit and the second determination unit indicate that the desired power purchaser and the desired power seller whose second power amount is smaller than the first power amount. If the contract cannot be executed based on the desired power purchase price and the desired power sale price, the hold price determination unit sets the price for purchasing and selling power with the retail electric power company as the contract result. The contract price determining device according to any one of claims 2 to 4, which is determined. The first determination unit arranges a plurality of the desired power purchase prices in descending order of the desired power purchase price, and arranges the plurality of the desired power sales prices in ascending order of the desired power sales price, and arranges the plurality of the desired power purchase prices in ascending order. The contract price determining device according to any one of claims 1 to 5 , which calculates the first contract price by associating the price and the plurality of desired electricity selling prices in the order in which they are arranged. Computer runs,
The step of acquiring the desired power purchase price from multiple desired power purchasers at a predetermined timing,
The step of acquiring the desired selling price from a plurality of desired selling prices at the predetermined timing, and
The step of acquiring the urgency corresponding to the spare time until the time when the desired power purchaser needs to buy power or the spare time until the time when the desired power seller needs to sell power, and the step.
Of the plurality of desired power purchase prices and the plurality of desired power sales prices, one or more of the desired power purchase prices whose desired power purchase price is higher than the desired power sales price and the desired power sales price are combined. A step of determining the first contract result including the first contract price calculated based on the desired power purchase price and the desired power sale price included, and
A plurality of the desired power purchase prices are arranged in ascending order of the urgency, and when the urgency is the same, the desired power purchase prices are arranged in descending order, and a plurality of the desired power sales prices are arranged in the order of the urgency. A second calculated by arranging the desired power selling prices in ascending order when the urgency is the same, and associating a plurality of the desired power purchase prices and a plurality of the desired power selling prices in the arranged order. Steps to determine the second contract result , including the contract price ,
When the total value of the first electric energy contracted at the first contract price is larger than the total value of the second electric energy contracted at the second contract price, it is determined that the first contract result is adopted, and the first power is used. A step of determining that the second contract result is adopted when the total value of the amounts is equal to or less than the total value of the second electric energy .
How to determine the contract price.

Images