JP7166242B2 - Power transaction contract calculation device and power transaction contract calculation method - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a power trade commitment calculation device and a power trade commitment calculation method.

Various techniques have been proposed as conventional execution calculations for conducting block bidding, which is bidding over a plurality of mutually consecutive basic time periods. For example, a combination optimization calculation method in which block bids are divided into basic time slots and matching is performed, and if matching is not possible in some of the basic time slots in the block bids, the conditions are changed and matching is performed again. has been proposed (for example, Patent Document 1).

In addition, for block bids that fail to match real-time sell and buy bids, a method has been proposed to increase the chances of execution by shifting to negotiation-type transactions or by performing matching again ( For example, Patent Document 2).

JP-A-2004-229363 JP-A-2005-025333

In the supply and demand adjustment market, multiple values, such as the desired unit price of supply and demand adjustment capacity (ΔkW unit price) and the desired unit price of activated power adjustment amount (kWh unit price), are presented for sell bidding. Then, the buying bidder pays the selling bidder the sum of the cost for procurement of supply and demand adjustment capacity (ΔkW cost) and the cost for operation of the activation adjustment power amount (kWh cost). However, a contract calculation method that considers multiple values has not been established.

Therefore, the present disclosure has been made in view of the above-described problems, and aims to provide a technology capable of performing appropriate contract calculation.

An electric power transaction contract calculation device according to the present disclosure includes a calculation unit that performs contract calculation for an electric power contract in which a block bid, which is a sell bid that spans a plurality of consecutive basic time periods, is carried out, and the calculation unit includes a buy bid. a bid data aggregator for aggregating data and sell bid data; and enumerating successful bidder candidate groups, which are combinations of a plurality of sell bids, based on the buy bid data and the sell bid data aggregated by the bid data aggregator. a contract calculation executing unit that selects, as a successful bidder group, a successful bidder candidate group that has the smallest sum of the cost of the supply and demand adjustment capacity of the sell bid and the cost of the activation adjustment power amount, from the successful bidder candidate group; an agreement result determination unit that determines an agreement result based on the result of selection of the successful bidder group by the calculation execution unit;

According to the present disclosure, in a power transaction in which block bidding is performed, a successful bidder candidate group that has the smallest sum of the cost of the supply and demand adjustment capacity of the sell bid and the cost of the activated adjustment power amount among the successful bidder candidate groups wins the bid. and determine the contract result based on the results of the selection of the winning bidder group. According to such a configuration, appropriate contract calculation can be performed.

FIG. 4 is a diagram showing an example of buy bid data of power transmission and distribution companies and sell bid data of balancing capacity supply companies in the supply and demand adjustment market; 1 is a block diagram showing an example of the configuration of a power transaction contract calculation system according to Embodiment 1; FIG. 4 is a flow chart showing the operation of the power transaction contract calculation system according to Embodiment 1; 4 is a flow chart showing the operation of the power transaction contract calculation system according to Embodiment 1; FIG. 11 is a block diagram showing an example of the configuration of an electricity transaction contract calculation system according to Embodiment 3;

The power transaction contract calculation device according to the embodiment will be described in detail below with reference to the drawings. It should be noted that the present disclosure is not limited by the following embodiments.

<Embodiment 1>
With the increase in renewable energy such as solar power generation and wind power generation, there is concern that supply and demand adjustment capacity will be insufficient in the future. Currently in Japan, power transmission and distribution companies procure supply and demand adjustment capacity through public offering, but a supply and demand adjustment market is scheduled to be opened in 2021 with the aim of improving the efficiency of securing supply and demand adjustment capacity. The supply and demand adjustment market is a market in which supply and demand adjustment capacity is traded for the stable supply of electricity. Power transmission and distribution companies bid for the amount of supply and demand adjustment capacity [ΔkW] that is required, and supply the supply and demand adjustment capacity in response. A business operator that can supply and demand adjustment capacity (supplyer of supply and demand adjustment capacity) can supply the supply and demand adjustment capacity [ΔkW], the desired unit price of supply and demand adjustment capacity (ΔkW unit price) [yen/ΔkW], and the amount of supply and demand adjustment capacity actually activated ( It is expected to become a market where the desired unit price (kWh unit price) [yen/kWh] of the activated adjustment power amount) [kWh] is presented and a sell bid is made. In addition, the power supply company is, for example, a power generation company, a VPP (Virtual Power Plant) company, a retail electricity company, or the like.

The power transmission and distribution business operator shall provide the balancing power supplier with the total of the cost (∆kW cost) for procurement of supply and demand balancing capacity [ΔkW] and the cost (kWh cost) for operating the triggered adjustment power amount [kWh], Payment will be made through the supply and demand adjustment market. If the total available supply of supply and demand adjustment capacity for which the supply of adjustment capacity is bid for sell is greater than the required amount of supply and demand adjustment capacity for which the transmission and distribution operator bids to buy, the electricity transmission and distribution operator will: It is necessary to decide the winning bidder so that the payment is as small as possible by some contract logic.

In order to reduce the costs paid by transmission and distribution companies, it is necessary to consider multiple different values such as the ΔkW unit price and the kWh unit price when calculating the contract. kWh cost is not determined because the size is unknown. Therefore, in Embodiment 1, the magnitude of the adjustment power amount to be activated is set by making some assumptions or making a prediction based on the past adjustment power amount to be activated.

FIG. 1 is a diagram showing an example of buying bid data of power transmission and distribution companies and selling bid data of balancing capacity supply companies in the supply and demand adjustment market. In the dot-hatched block bidding in FIG. 1, it is not possible to divide the available supply amount or the suggested selling price into units of basic time slots (30 minutes in FIG. 1) and to trade for each basic time slot. For example, in FIG. 1, the first selling bidder has the available quantity for one hour from 1:00 to 2:00, the basic time slot from 1:00 to 1:30, and from 1:30 to 2:00. It is shown that it is presented with a block bid that cannot be traded separately from the basic time zone until. In the following description, the basic time zone may also be referred to as time or time zone.

Combinatorial optimization calculations are necessary in order to reduce the costs paid by transmission and distribution companies while securing the required amount of supply and demand adjustment capacity. However, when block bidding is included and the number of bidders increases and the number of combinations increases, in addition to the difficulty of considering multiple different values, the optimization calculation becomes complicated and the execution calculation takes a long time. or the optimal solution may not be obtained. Therefore, the power transaction contract calculation device according to the first embodiment considers only the desired unit price (ΔkW unit price) of the supply and demand adjustment capacity, enumerates a plurality of successful bidder candidate groups that are a combination of a plurality of sell bids, and A method is used in which the successful bidder candidate group with the smallest sum of the cost of the supply and demand adjustment capacity (ΔkW cost) and the cost of the activation adjustment power amount (kWh cost) of the sell bid is selected as the successful bidder group. According to such a configuration, it is possible to smoothly establish a transaction in the supply and demand adjustment market by the contract logic based on the selection result.

FIG. 2 shows an example of the configuration of the power transaction contract calculation system according to the first embodiment. As shown in FIG. 2, the power transaction contract calculation system 1 includes a power transaction contract calculation device 2, a communication network 3, a plurality of buying bidder terminal devices 4, and a plurality of selling bidder terminal devices 5. ing.

The buying bidder terminal device 4 is an information terminal device such as a personal computer provided in the office or the like of the power transmission and distribution business operator who is the buying bidder in the supply and demand adjustment market. The selling bidder terminal device 5 is an information terminal device, such as a personal computer, installed in the office or the like of the company providing the balancing capacity, who is a selling bidder in the supply and demand adjustment market. The buying bidder terminal device 4 and the selling bidder terminal device 5 can perform data communication with the power contract calculation device 2 via a communication network 3 such as an optical line or a LAN (Local Area Network).

The power transaction contract calculation device 2 is a device that includes an interface unit 21, a storage unit 22, a communication unit 23, and a calculation unit 24. It is an information terminal device such as a server provided in a mobile phone or the like. The communication unit 23 can perform data communication with the terminal device 4 of the buying bidder and the terminal device 5 of the selling bidder via the communication network 3. The communication unit 23 can perform data communication with the terminal device 4 of the buying bidder and the terminal device 5 of the selling bidder. Configured.

The interface section 21 includes an input section 21a and an output section 21b. The input unit 21a is configured so that an operator of the supply and demand adjustment market can input data necessary for trading using a keyboard and a mouse. The output unit 21b is configured to be able to output information on a buy bid, information on a sell bid, and information on a successful bid in a transaction to a display device or the like.

The storage unit 22 stores information on the buy bid (buy bid data) acquired by the communication unit 23 via the communication network 3, information on the sell bid (sell bid data), and information on the successful bid determined by the calculation unit 24. It consists of a storage device such as a hard disk that stores information (agreement result data). The buy bid data includes, for example, the required amount of supply and demand adjustment capacity [ΔkW] and the required time period for the supply and demand adjustment capacity. The sell bid data includes, for example, the supply and demand adjustment capacity supply capacity [ΔkW], the supply and demand adjustment capacity available time zone (supply possible time), the supply and demand adjustment capacity suggested selling price [yen/ΔkW], and the adjustment power to be activated. Includes the suggested selling unit price [yen/kWh] of the quantity. The contract result data includes, for example, a combination of successful sell bids, a contract amount of supply and demand adjustment capacity [ΔkW], and a contract price [yen/ΔkW, yen/kWh].

The calculation unit 24 performs contract calculation for power trading in which a block bid, which is a sell bid over a plurality of mutually continuous basic time periods, is executed. The calculation unit 24 includes a bid data aggregator 24a, a contract calculation execution unit 24b, and a contract result determination unit 24c, and is composed of an arithmetic processing unit including a CPU, memory, and the like.

The bid data aggregating unit 24a aggregates the buying bid data from the power transmission and distribution companies and the selling bid data from the balancing power supply companies obtained via the communication unit 23 and the like.

Based on the buy bid data and sell bid data aggregated by the bid data aggregation unit 24a, the contract calculation execution unit 24b calculates the cost of the supply and demand adjustment capacity of the sell bids among the successful bidder candidate groups that are combinations of multiple sell bids. And the successful bidder candidate group that minimizes the sum of the costs for the activation adjustment power amount is selected as the successful bidder group. In the first embodiment, the contract calculation execution unit 24b satisfies the conditions related to the unit price of the activated adjustment power amount, secures the required amount of supply and demand adjustment capacity, and selects a combination of a plurality of sell bids in which the cost of supply and demand adjustment capacity is small, A group of successful bidder candidates is selected while changing the conditions. Then, the contract calculation execution unit 24b selects a successful bidder candidate whose sum of the cost of the supply and demand adjustment capacity (ΔkW cost) and the cost of the activation adjustment power amount (kWh cost) is the smallest among the selected successful bidder candidate groups. The group is selected as the winning bidder group.

The agreement result determination unit 24c determines the agreement result based on the result of selection of the successful bidder group by the agreement calculation execution unit 24b. In Embodiment 1, the contract result determination unit 24c is an arithmetic processing unit that determines the calculation result (selection result) by the contract calculation execution unit 24b as the contract result. The agreement result confirmation unit 24c stores the confirmed agreement result as agreement result data in the storage unit 22, and transmits the agreement result to the buying bidder terminal device 4 and the selling bidder terminal device 5 via the communication unit 23 and the communication network 3. Send data.

<Action>
FIG. 3 is a flow chart showing the operation of the power transaction contract calculation system 1 according to the first embodiment. Next, this operation will be described with reference to FIG.

First, in step S1, the power transmission and distribution business operator uses the buying bidder terminal device 4 to place a buying bid for the required amount of supply and demand adjustment capacity, and the balancing capacity supply business operator uses the selling bidder terminal device 5. Sell and bid on the supply capacity of supply and demand adjustment capacity, the desired ΔkW unit price, and the desired kWh unit price. This accepts buy and sell bids.

In step S2, when the transaction on a predetermined date and time is completed for each product with supply and demand adjustment capacity and for each delivery date and time, the bid data aggregation unit 24a stores buy bid data and sell bid data for each basic time period. The data are stored in the unit 22 and aggregated.

The procedure from step S3 to step S10 is performed by the contract calculation executing section 24b. First, in step S3, the contract calculation execution unit 24b obtains the maximum kWh unit price of all sell bids based on the buy bid data and sell bid data aggregated by the bid data aggregation unit 24a, and calculates the initial threshold value. set to

In step S4, the contract calculation execution unit 24b selects a sell bid whose kWh unit price is equal to or less than the threshold.

In step S5, the contract calculation execution unit 24b performs contract calculation so as to suppress the ΔkW cost as much as possible, targeting sell bids for which the kWh unit price selected in step S4 is equal to or less than the threshold. Note that heuristics such as Greedy Heuristic may be used for execution calculations that minimize the ΔkW cost.

In step S6, the contract calculation execution unit 24b determines whether or not a solution for contract calculation (combination of a plurality of sell bidders) has been obtained. If it is determined that the contract calculation solution has been found, the process proceeds to step S7, and if it is determined that the contract calculation solution has not been found, the process proceeds to step S9.

In step S7, the contract calculation executing unit 24b stores the obtained solution as a successful bidder candidate group.

In step S8, the contract calculation execution unit 24b lowers the threshold in step S4. As a method for lowering the threshold, a method according to the following equation (1) may be used, or a method according to the following equation (2) may be used.

Definitions of variables and constants in equations (1) and (2) are as follows.
max _t : Maximum value of kWh unit price at time t of all sell bids min _t : Minimum value of kWh unit price at time t of all sell bids a _t,n : Threshold value of nth kWh unit price of repeated calculation at time t ( 0≤at _{, n≤maxt} )
b _t : Real number satisfying 0<b _t <(max _t −min _t ) c _t : Real number satisfying 0<c _t <1

After step S8, the process returns to step S4. As a result, the processing from step S4 to step S7 is repeated until the solution is no longer found in step S6 while the threshold value used in step S4 is lowered step by step. At this time, saving of the winning bidder candidate group in step S7 is performed not by overwriting, but by accumulating and saving. As a result, one successful bidder candidate group (combination of multiple selling bidders) exists for one threshold.

In step S9, the contract calculation execution unit 24b sets the magnitude of the activation adjustment power amount. Note that the contract calculation execution unit 24b may set the activation adjustment power amount for each time.

In step S10, the contract calculation execution unit 24b calculates kWh costs for each of a plurality of successful bidder groups respectively corresponding to a plurality of thresholds using the set activation adjustment power amount, and calculates the kWh costs and the ΔkW costs. Find the sum of Then, the contract calculation executing unit 24b selects the successful bidder candidate group with the smallest total as the successful bidder group and contracts.

In step 11, the agreement result determination unit 24c determines the selection result of the successful bidder group by the agreement calculation execution unit 24b as the agreement result.

In step S<b>12 , the contract result determination unit 24 c stores the confirmed contract result data in the storage unit 22 . Also, the contract result determination unit 24 c transmits contract result data to the buying bidder terminal device 4 and the selling bidder terminal device 5 via the communication unit 23 and the communication network 3 . However, the agreement result data transmitted to the selling bidder terminal device 5 excludes the information of other successful bidders.

In the above, we explained the case of "adjustment capacity" (adjustment capacity to deal with shortage of supply), but in the supply and demand adjustment market, "adjustment capacity to decrease" (adjustment capacity to deal with surplus of supply) adjustment capability) is also expected to be subject to the transaction. In a downward adjustment capacity transaction, transmission and distribution companies pay costs to the adjustment capacity supply company for the procurement of the supply and demand adjustment capacity [ΔkW], as with the upward adjustment capacity. Distributors will receive costs from the regulating power providers. Since the cost for the activated adjustment power amount [kWh] is the product of the kWh unit price [yen/kWh] and the amount of the activated adjustment power amount [kWh], it is agreed that the kWh unit price is high for the power transmission and distribution business operator. is desirable. Based on the above, by changing the flowchart of FIG. 3 to the flowchart of FIG. 4, it is possible to cope with the downward adjustment force. Differences between the flowchart of FIG. 4 and the flowchart of FIG. 3 are as follows [1] to [4].

[1] In step S3, the contract calculation execution unit 24b sets the lowest kWh unit price of all sell bids to the initial threshold value based on the buy bid data and sell bid data aggregated by the bid data aggregation unit 24a. set to [2] In step S4, the contract calculation execution unit 24b selects a sell bid whose kWh unit price is equal to or greater than a threshold. [3] In step S5, the contract calculation execution unit 24b performs contract calculation so as to suppress ΔkW costs as much as possible, targeting the sell bids selected in step S4 for which the kWh unit price is equal to or greater than the threshold. [4] At step S8, increase the threshold at step S4. As a method for increasing the threshold value, a method according to the following equation (3) may be used, or a method according to the following equation (4) may be used.

Definitions of variables and constants in equations (3) and (4) are as follows.
a′ _t,n : kWh unit price threshold for the n-th repeated calculation at time t (min _t ≦a′ _t,n )
b' _t : real number satisfying 0<b' _t <(max _t -min _t ) c' _t : real number satisfying c' _t >1

<Summary of Embodiment 1>
According to the configuration and processing flow according to the first embodiment as described above, among the successful bidder candidate groups, the successful bidder candidate group that has the smallest sum of the cost of the supply and demand adjustment capacity of the sell bid and the cost of the activated adjustment power amount is selected. Select as a group of successful bidders and determine the contract result based on the results of the selection of the group of successful bidders. As a result, it is possible to perform an appropriate contract calculation that takes into consideration multiple values such as the cost of supply and demand adjustment capacity and the cost of activated adjustment power.

<Embodiment 2>
The cost (ΔkW cost) for procurement of supply and demand adjustment capacity [ΔkW] paid by a power transmission and distribution business operator is determined by the product sum of the ΔkW unit price [yen/ΔkW] at each time and the available supply amount [ΔkW]. Similarly, the cost (kWh cost) for the operation of the activation adjustment power amount [kWh] is determined by the product sum of the kWh unit price [yen/kWh] at each time and the activation adjustment power amount [kWh]. Regarding the ΔkW unit price and kWh unit price, which are used to calculate the cost at the time of payment, it is expected that the multiple price auction method will be adopted for the price determination method in the supply and demand adjustment market to be opened in 2021 for the time being. Adoption of a price auction system is also being considered. The detailed price determination method when the single price auction method is adopted is unknown. However, as a method that may be adopted, the contract price is determined by finding the highest price for the desired unit price of the contracted sell bids at each time, and the contract price is applied to the settlement of all contracted sell bids at that time. methods, etc.

In the second embodiment, the contract result determination unit 24c determines the ΔkW unit price and the kWh unit price used for cost calculation at the time of settlement, and calculates the settlement price. In the case of the multiple price auction method, the contract result determination unit 24c directly contracts the desired ΔkW unit price of each sell bid included in the successful bidder group selected by the contract calculation execution unit 24b as shown in the following formula (5). Use as price to calculate ΔkW cost. In the case of the single-price auction method, the contract result determination unit 24c first determines the time Find a single execution price for each (basic time period). For example, the contract result determination unit 24c obtains the maximum desired ΔkW unit price at each time as a single contract price at each time, as shown in the following equation (6). Then, the contract result determination unit 24c calculates the ΔkW cost by applying a single contract price at each time to all contracted sell bids at that time, as shown in the following equation (7).

Similar to the calculation of the ΔkW cost, the contract result determination unit 24c calculates the kWh cost using the following formula (8) in the case of the multi-price auction method, and the following formula (9) and ( 10) is used to calculate the kWh cost.

The definitions of variables and constants in formulas (5) to (10) are as follows.
cost_kW _multi : ΔkW cost [yen] in the multi-price auction method
cost_kW _single : ΔkW cost [yen] in the single-price auction method
cost_kWh _multi : kWh cost [yen] in the multi-price auction method
cost_kWh _single : kWh cost [yen] in the single-price auction method
j: contracted sell bid number (1,...,n')
p _j : Desired ΔkW unit price of contracted sell bid j [yen/ΔkW]
q _j : Desired kWh unit price of contracted sell bid j [yen/kWh]
c _j,t : Supplyable amount of supply and demand adjustment capacity at time t of contracted sell bid j [ΔkW]
D _j,t : Predicted value of triggered adjustment power amount [kWh] at time t for contracted sell bid j (non-negative constant for upward adjustability, non-positive constant for downward adjustability)
T: set {1, 2, . . . , m} (transaction target time)
T _j : j-th of n′ subsets for T (the available time slot for the executed sell bid j, and the following formula (11) holds)

<Summary of Embodiment 2>
According to the configuration according to the second embodiment as described above, appropriate contract calculation can be performed for the multiple-price auction method and the single-price auction method.

<Embodiment 3>
VPP operators and other supply companies of supply and demand balance gather distributed energy resources (solar power generation, DR (Demand Response), etc.) supplied by consumers and others to supply and demand balance supply to sell in the supply and demand balance market. may be procured by This configuration is shown in FIG.

In Embodiment 3, the buying bidder in the power trading in which the block bidding described in Embodiments 1 and 2 is carried out is a power supply company such as a VPP company. The VPP business operator 43 conducts supply and demand adjustment capacity transactions in order to collect supply and demand adjustment capacity to be sold in the supply and demand adjustment market. This transaction is performed by the supply and demand adjustment trading system 44 . In this transaction, the VPP business operator 43 bids for the amount of supply and demand adjustment capacity that it wishes to procure, and in response, the consumer 45 presents the suppliable amount and desired unit price of the supply and demand adjustment capacity and the desired unit price of the activated adjustment power amount. bid to sell. The supply and demand adjustment power trading system 44 makes a contract by combining a plurality of selling bids so that the procurement cost can be reduced while securing the amount that the VPP business operator 43 wants to procure.

This transaction is the same as the transaction in which the power transmission and distribution operator 41 procures supply and demand adjustment capacity from the VPP operator 43 in the supply and demand adjustment market 42 . In Embodiment 3, Embodiments 1 and 2 above are applied to a supply and demand adjustment capacity trading system when a supply and demand supply business operator such as a VPP business operator procures supply and demand adjustment capacity from a consumer or the like.

<Summary of Embodiment 3>
In the configuration according to Embodiment 3, the above-described Embodiments 1 and 2 are applied to transactions when a balancing power provider such as a VPP business procures balancing power to sell on the balancing market. . According to such a configuration, appropriate contract calculation can be performed for the transaction.

In addition, it is possible to combine each embodiment freely, and to modify|transform and abbreviate|omit each embodiment suitably.

2 Electric power transaction contract calculation device, 24 calculation unit, 24a bid data aggregation unit, 24b contract calculation execution unit, 24c contract result determination unit, 42 supply and demand adjustment market, 43 VPP operator.

Claims (7)

a computing unit that performs contract calculation for power trading in which block bidding, which is a sell bidding that spans a plurality of mutually consecutive basic time zones, is carried out;
The calculation unit is
a bid data aggregator for aggregating buy bid data and sell bid data;
Based on the buy bid data and the sell bid data aggregated by the bid data aggregation unit, a successful bidder candidate group, which is a combination of a plurality of sell bids, is enumerated, and supply and demand of sell bids among the successful bidder candidate groups. a contract calculation execution unit that selects, as a successful bidder group, a successful bidder candidate group that has the smallest sum of the cost of control power and the cost of activated adjustment power;
an agreement result determination unit that determines an agreement result based on a result of selection of the successful bidder group by the agreement calculation execution unit. The power trading commitment computing device of claim 1, comprising:
The contract calculation execution unit
An electric power transaction contract calculation device that selects a combination of a plurality of sell bids that satisfy the conditions related to the unit price of the activated adjustment power amount and have a small cost for the supply and demand adjustment capacity as the successful bidder candidate group while changing the conditions. 3. The power transaction contract computing device according to claim 1 or claim 2,
The contract result determination unit
An electric power transaction contract calculation device that calculates a settlement price of a multiple price auction method by using, as a contract price, a desired unit price of each sell bid included in the successful bidder group selected by the contract calculation execution unit. 3. The power transaction contract computing device according to claim 1 or claim 2,
The contract result determination unit
Based on the desired unit price of each sell bid included in the successful bidder group selected by the contract calculation execution unit, a single contract price is obtained for each of the basic time periods, and the contract price is used to obtain a single price. A power transaction contract calculation device that calculates an auction settlement price. 5. A power contract calculation device according to any one of claims 1 to 4,
The power transaction contract computing device, wherein the market for power trading is a supply and demand adjustment market. 5. A power contract calculation device according to any one of claims 1 to 4,
A power transaction contract computing device, wherein a buying bidder in the power transaction is a power supply provider. As an operation for calculating a contract for an electricity transaction in which a block bid, which is a sell bid that spans a plurality of mutually consecutive basic time periods, is carried out,
aggregating buy bid data and sell bid data;
enumerating a successful bidder candidate group that is a combination of a plurality of sell bids based on the aggregated buy bid data and sell bid data;
Selecting, from among the successful bidder candidate groups, a successful bidder candidate group having the smallest sum of the cost of the supply and demand adjustment capability of the sell bid and the cost of the activated adjustment power amount as the successful bidder group;
A power transaction contract calculation method, wherein a contract result is determined based on the results of selection of the successful bidder group.

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