JP2023054543A - Electric power transaction device - Google Patents

Abstract

To provide an electric power transaction device capable of realizing stabilization of an electric power system and effective utilization of renewable energy.SOLUTION: An electric power transaction device 1 comprises a contract processing part 12 to match a selling bid and a buying bid accepted from multiple customers every unit time zone, and to contract, and an inputting part 10 to accept the information on power supply/demand of an electric power system and the information on congestion state of the electric power system. The contract processing part 12 balances hourly power supply/demand of the electric power supply system every unit time zone, and limits the total amount of a contracting amount so that the power generation by the power flow becomes equal to or less than the power line transmission capacity of the electric power supply system. Moreover, the electric power transaction device 1 comprises a providing part 14 based on the information accepted by the inputting part 10, where the providing part generates the unit time zone in which the total amount of sale desiring power amount is expected to exceed the total amount of purchase desiring power amount, or the unit time zone in which the power flow is expected to be less than the power line transmission capacity, or the information on a local community, and provides them to the multiple customers.SELECTED DRAWING: Figure 4

Description

TECHNICAL FIELD The present disclosure relates to a power trading device.

Japanese Unexamined Patent Application Publication No. 2006-31641 (Patent Document 1) discloses an electricity spot market contract processing method configured to calculate the contract amount of a market segmentation contract in consideration of the power flow upper limit constraint of interconnection lines between bid areas. is disclosed.

JP-A-2006-31641

According to the execution processing method described in Patent Literature 1, it is possible to execute a buy/sell order while complying with constraints such as the free capacity constraint of interconnection lines between areas and the supply and demand balance constraint.

On the other hand, however, for the participants of the power trading market, there may be a case where the contract amount is smaller than the bidding sell order power amount and buy order power amount. In such a case, it is feared that the motivation to participate in the power trading market will decrease and the activation of the power trading market will be hindered.

In addition, when many sell orders are placed on the power trading market for power generated by renewable energy, and the total amount of power sold exceeds the total amount of power purchased, in order to comply with the above-mentioned constraints, It is feared that the contracted amount will be restricted and that it will hinder the utilization of renewable energy.

The present disclosure has been made to solve the above problems, and an object thereof is to provide a power transaction device that can realize stabilization of the power system and effective use of renewable energy.

A power trading apparatus according to an aspect of the present disclosure contracts power trading between a plurality of consumers interconnected to a power system. The power trading apparatus includes a contract processing unit that matches sell bids and buy bids received from a plurality of consumers for each unit time period to execute a contract; and an input unit for receiving information. The contract processing unit is configured to balance the supply and demand of power in the power system for each unit time period, and to limit the total amount of the contract amount so that the power flow is equal to or less than the operating capacity of the transmission line in the power system. . Based on the information received by the input unit, the power trading apparatus determines the unit time period in which the total amount of power desired to be sold is expected to exceed the total amount of power desired to be purchased, or when the power flow falls below the operating capacity of the transmission line. It further comprises a providing unit that generates information on an expected unit time period or area and provides it to a plurality of consumers.

Advantageous Effects of Invention According to the present disclosure, it is possible to provide an electric power transaction device capable of stabilizing an electric power system and effectively utilizing renewable energy.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows roughly the structural example of the P2P power trading system to which the power trading apparatus which concerns on embodiment is applied. It is a figure explaining the aspect of the bid in a P2P power trading market. It is a block diagram which shows the hardware structural example of a P2P electric power trading market. FIG. 3 is a block diagram showing functional configurations of a P2P power trading market and agents; FIG. 10 is a diagram for explaining an example of contract amount limiting processing in a contract processing unit; FIG. 12 is a diagram for explaining another example of contract amount limiting processing in the contract processing unit;

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated.

<Configuration example of P2P power trading system>
FIG. 1 is a diagram schematically showing a configuration example of a P2P (Peer to Peer) power trading system to which a power trading device according to the present embodiment is applied.

Referring to FIG. 1 , the P2P power trading system has a P2P power trading market 1 . In the P2P power trading market 1, power sales transactions are conducted directly between consumers 8 and 9 who have power resources. The P2P power trading market 1 manages P2P power trading. The P2P power trading market 1 corresponds to an example of a "power trading device".

Power resources include distributed power sources DER (Distributed Energy Resources), power loads, and prosumers. Distributed power supply DER is a small-scale power generation facility, and includes power generation facilities using fossil fuels such as gas engines and gas turbines, power generation facilities using renewable energy such as solar power generation, wind power generation and biomass power generation. Power generation facilities using hydrogen such as fuel cells, and power storage devices ESS (Energy Storage Systems) such as storage batteries are included. The storage battery can include a storage battery mounted on the mobile object 200 .

The moving body 200 is equipped with a storage battery that can be charged from the outside and discharged to the outside. The moving body is, for example, an electric vehicle, a hybrid vehicle, a plug-in hybrid vehicle, or an automatically driving vehicle capable of unmanned transportation of goods.

A prosumer is a consumer who owns a power generation facility and a power storage device that stores the power generated by the power generation facility. remaining power) can be supplied to other power resources.

In the example of FIG. 1, the consumer 8 has a charging/discharging facility 220, and by connecting the mobile unit 200 to the charging/discharging facility 220, the electric power generated by the distributed power supply DER is stored in the storage battery of the mobile unit 200. It can be stored and surplus power can be supplied to other power sources. Alternatively, the consumer 8 can store the power generated by the distributed power supply DER in the power storage device ESS and supply surplus power to other power resources.

Consumers 9 have power loads such as houses, buildings, factories, and commercial facilities, and consume power. A charging/discharging facility 220 is installed in the customer 9 , and by connecting the mobile body 200 to the charging/discharging facility 220 , the storage battery of the mobile body 200 can be charged.

A consumer 8 and a consumer 9 are connected to the transmission line 4 . The power transmission and distribution business operator 6 procures electric power from a power generation business operator (not shown) and supplies the procured power to the power transmission line 4 . Consumers 8 can supply power to other power resources through transmission lines 4 . A consumer 9 can receive power supply through the transmission line 4 .

Each of the consumers 8 and 9 is provided with a smart meter SM. The smart meter SM is installed at a power receiving point from the power transmission line 4 at the consumer. A smart meter SM is a power meter that measures the amount of power at a power receiving point. The smart meter SM measures the amount of electric power every predetermined time (for example, 30 minutes). The smart meter SM measures the tidal power at the power receiving point (the power supplied from the power transmission line 4 to the consumer) as a positive value, and measures the reverse power flow at the power receiving point (the power supplied from the consumer to the power transmission line 4). power) is measured as a negative value. That is, the power at the power receiving point includes not only the power demanded by the consumer, but also the power supplied by the consumer.

Smart meter SM is maintained and managed by retail electricity supplier 5 . The smart meter SM stores the measured amount of power and transmits it to the electricity retailer 5 . In addition, the smart meter SM transmits the measured power amount to the electricity retailer 5 in response to a request from the electricity retailer 5 .

A retail electricity supplier 5 has contracts with a plurality of consumers 8 and 9 . The electricity retailer 5 is obliged to supply the same amount of electric power at the same time, that is, to match the amount of electric power demanded and the amount of electric power supplied. In addition, after the full liberalization of the electricity retail market in FY2016, the planned value that obliges the electricity retailer 5 to match the demand and supply with the planned value and to match the planned value and the actual value. Simultaneous and equal amount system is adopted. In this system, when an imbalance occurs, which is the difference between the planned value and the actual value, and a shortage of power occurs, the electricity retailer 5 pays the power transmission and distribution business 6 an imbalance fee as a penalty. become.

The P2P power trading market 1 accepts sell bids from consumers 8 who are sellers, and accepts buy bids from consumers 9 who are buyers. Bids from each consumer are executed through an agent in charge. The P2P power trading market 1 receives bids from a plurality of consumers 8 and 9 through agents, and a contract is made for those that meet the bidding conditions of the seller side and the buyer side. A contract means that a sales transaction is concluded in response to a bid.

Specifically, as shown in FIG. 2, a plurality of buyers and sellers exchange price and power amount pairs (p, q) for each unit time period (1, 2, . . . n) Bid on (P, Q). Note that the unit time period indicates one of the time periods obtained by dividing the power procurement time into predetermined time lengths set in the P2P power trading market 1 . Currently, in Japan, 24 hours are divided into 48 segments, so the length of one unit time zone is 30 minutes. Transactions of electric energy are performed for each electric energy transmitted within a unit time period (electric power×unit time period length).

For example, if the customer 8 wishes to supply surplus power to other power resources, the customer 8 submits a sell bid to the P2P power trading market 1 for each unit time period via an agent. I do. In addition, when the customer 9 wishes to charge the storage battery of the mobile body 200 through the charging/discharging facility 220, the customer 9 requests the P2P power trading market 1 via an agent for each unit time period. Place a buy bid. Note that the customer 9 may bid separately for the owned moving body 200 and the bid for the house.

The agent is a processing device (computer) owned by a consumer, and is capable of exchanging information with information processing devices (servers) constituting the P2P power trading market 1 via a communication network. there is The communication network is not particularly limited as long as it is a communication network used for data communication between devices. The agent may be configured by a computer provided within the customer's facility, or may be configured using cloud computing.

The operator of the P2P power trading market 1 uses an arbitrary algorithm to execute power trading contracts between sellers and buyers who meet the bidding conditions. For executions, the execution calculation determines the execution amount and execution price. In addition, the contract amount refers to the trading volume determined by the contract calculation. Execution price means the transaction price determined by execution calculation. The contracted price is also called the market price. On the other hand, a bid for which a time period that meets the bid conditions cannot be found will be treated as uncontracted.

When the contract is executed, the customer 8 transmits power through the transmission line 4 to the customer 9 of the trading partner. A customer 9 receives power from a customer 8 of a trading partner through the transmission line 4 . That is, power is transmitted and received between consumers through the transmission line 4 .

At this time, in order to comply with the above-mentioned system of the same amount of planned value at the same time, the electric power retailer 5 conducts power transactions with the consumers 8 and 9 via the power transmission line 4 according to the agreed amount. expect.

However, in power generation equipment using renewable energy such as solar power generation, the amount of power generated fluctuates due to natural factors such as weather. In addition to natural factors, power demand fluctuates due to social factors such as life cycles and operation plans. Therefore, in P2P power trading, there may be a case where the contracted amount and the actual traded amount do not match at each of the consumers 8 and 9 . For example, in the consumer 8, the amount of power to be transmitted to the power system may be less than the agreed amount due to natural factors causing the amount of power generated by a power generation facility such as a photovoltaic power generation system to fall below the planned value. In addition, at the consumer 9, the power demand may fall below the planned value due to natural and social factors, and the amount of power received from the power system may be less than the contracted amount.

In such a case, in the power system, there is a possibility that the actual value of demand and the actual value of supply will not match, and the supply and demand balance of electric power will collapse. In addition, the electricity retailer 5 cannot match the actual value with the planned value for at least one of the amount of demand and the amount of supply, and it may be difficult to simultaneously achieve the planned value. .

Also, in the electric power system, congestion may occur due to the concentration of a plurality of power transactions in one unit time period. Grid congestion refers to a state in which the power flow of the transmission line 4 exceeds the operating capacity of the transmission line 4 . In this case, it becomes necessary to suppress the power flow in order to eliminate system congestion.

In the P2P power trading system according to the present embodiment, the P2P power trading market 1 acquires information on the supply and demand of the power system from the electricity retailer 5, and receives information indicating the state of congestion in the power system from the power transmission and distribution company 6. get. The P2P power trading market 1 is configured to adjust the total amount of contracts for P2P power trading based on the obtained information, taking into consideration the power system supply and demand balance and transmission line capacity constraints. As will be described later, the adjustment of the total amount of contracted amounts in the P2P power trading market 1 includes limiting the total amount of contracted amounts and canceling the restriction on the total amount of contracted amounts.

<Structure of P2P power trading market>
FIG. 3 is a block diagram showing a hardware configuration example of the P2P power trading market 1. As shown in FIG.

Referring to FIG. 3, P2P power trading market 1 includes a CPU (Central Processing Unit) 20 for controlling the entire apparatus, a communication interface (I/F) 28 connected to CPU 20, a memory, and an operation unit. 30 included. The communication I/F has a function of communicating with other devices including the agent 7 , the electricity retailer 5 and the electricity transmission and distribution operator 6 through communication connected to the communication network 40 .

The memory is, for example, a ROM (Read Only Memory) 22 which is a memory for storing programs executed by the CPU 20, a work area when the CPU 20 executes the programs, and a memory for storing calculated values. and a HDD (Hard Disk Drive) 26 as an example of a large storage device. The operation unit 30 receives operation input by the operator of the P2P power trading market 1 . The P2P power trading market 1 can be configured with functions corresponding to general computers.

FIG. 4 is a block diagram showing functional configurations of the P2P power trading market 1 and the agent 7. As shown in FIG.

Referring to FIG. 4 , P2P power trading market 1 includes system information input unit 10 , contract processing unit 12 , and market information providing unit 14 . These functional configurations are realized by the CPU 20 executing a predetermined program in the P2P power trading market 1 shown in FIG.

The system information input unit 10 receives information on the power system from the electricity retailer 5 and the power transmission/distribution company 6 . Specifically, the system information input unit 10 receives information on supply and demand of power in the power system from the electricity retailer 5 . The information on supply and demand includes information on actual values of demand and supply, and information on planned values of demand and supply.

Note that the electricity retailer 5 can calculate the actual values of the amount of demand and the amount of supply based on the measured values of the amount of electric power transmitted from the smart meters SM installed at the consumers 8 and 9. . Specifically, the electricity retailer 5 calculates the sum of the measured values of the electric energy of each customer 9 as the actual value of the demand in the electric power system, and calculates the sum of the measured values of the electric energy of each customer 8. It is calculated as the actual value of the supply amount in the power system.

In addition, the system information input unit 10 receives information about the state of congestion in the power system from the power transmission and distribution business operator 6 . This information includes information as to whether or not the power flow flowing through the transmission line 4 exceeds the operating capacity of the transmission line 4 . The system information input unit 10 transfers the acquired information on the power system to the contract processing unit 12 and the market information providing unit 14 .

The contract processing unit 12 receives a sell bid from an agent 7 of a customer 8 who is a seller and a buy bid from an agent 7 of a customer 9 who is a buyer. The bidding information received from the agent 7 includes the time period for procuring power, the amount of electric power for each unit time period in that time period, and the purchase price for each unit time period for procuring the electric power amount. .

The contract processing unit 12 matches sell bids and buy bids to conclude power transactions. Specifically, the contract processing unit 12 performs matching processing between sell bids of one or more consumers 8 and buy orders of one or more consumers 8 for each unit time period. The contract processing unit 12 normally performs matching processing according to a first-come, first-served contract method.

The contract processing unit 12 transmits information to the effect that the contract has been made to the customer who has made the contract. At this time, the contract processing unit 12 transmits information indicating the contract amount and the contract price. In addition, the contract processing unit 12 transmits non-contract information to consumers who did not contract.

The contract processing unit 12 calculates the amount of demand in the electric power system during the time when power is actually procured based on the information on the actual values of the amount of demand and the amount of supply in the electric power system, which is obtained from the electricity retailer 5. and the amount of supply match. When the actual value of the demand quantity exceeds the actual value of the supply quantity, the contract processing unit 12 adjusts the demand quantity and the supply quantity so that the difference between the actual value of the supply and demand quantity and the actual value of the supply quantity becomes zero. limit the total amount of the contract amount in that time period so that it matches the amount.

FIGS. 5 and 6 are diagrams for explaining an example of contract amount limiting processing in the contract processing unit 12. FIG. For example, when a plurality of power transactions are concluded in a unit time period τ in which the actual value of demand exceeds the actual value of supply, the contract processing unit 12 limits the contract amount in each power transaction. .

Specifically, with reference to FIG. 5, the contract processing unit 12 calculates the reduction amount of the demand amount by subtracting the actual value of the demand amount from the actual value of the supply amount. The shaded area in the figure indicates the amount of reduction in demand. The contract processing unit 12 proportionally distributes the calculated reduction amount of the demand amount according to the size of the contract amount in the plurality of power transactions. The actual trading volume in each power transaction will be limited to the contracted volume minus the reduced volume. In addition, by proportionally distributing the reduction amount of the demand amount according to the size of the contract amount in a plurality of power transactions, the ratio of the transaction amount to the contract amount becomes equal among the plurality of power transactions.

Alternatively, as shown in FIG. 6, when a plurality of power transactions are contracted in the unit time period τ in which the actual value of demand exceeds the actual value of supply, the contract processing unit 12 starts trading. It is configured to secure the trading volume according to the contracted quantity from the earliest one, and to limit the contracted quantity for the electricity trading whose trading start time is late. In this case, when the actual value of the amount of demand matches the actual value of the amount of supply, power trading will be suspended thereafter.

The contract processing unit 12 transmits information on the determined transaction volume through the agent to the consumers 8 and 9 who execute the power transaction in the unit time period τ. Consumers 8 and 9 who have received the information procure power according to the determined transaction volume.

The contract processing unit 12 further determines whether or not grid congestion occurs during the time period when power is actually procured, based on information about the congestion status of the power grid acquired from the power transmission and distribution business operator 6. to decide. When it is determined that the system is congested, the contract processing unit 12 limits the total amount of contracts in the relevant time zone so that the power flow flowing through the transmission line 4 is equal to or less than the operating capacity of the transmission line 4. - 特許庁

Limiting the contract amount is done in the manner shown in FIGS. 5 and 6 . Alternatively, the plurality of consumers 9 who execute power transactions in the unit time period τ include small consumers who procure small amounts of power with high frequency and large consumers who procure large amounts of power with low frequency. In this case, it may be configured to preferentially limit the contract amount of the small-lot customer.

Returning to FIG. 4, the market information providing unit 14 uses the information on the planned values of the demand and supply in the power system, which is acquired from the electricity retailer 5, to determine whether the P2P power trading market 1 accepts sell bids. Predict the total amount of electricity desired to be sold and the amount of electricity desired to be sold for a buy bid.

For example, in a unit time period in which the planned supply amount exceeds the planned demand amount, it is predicted that the total amount of electric power desired to be sold will be greater than the total amount of electric power desired to be purchased. In this case, it is expected that the execution price will be lower due to market principles. Therefore, it becomes possible for the buyer to procure a large amount of power at low cost.

Further, the market information providing unit 14 predicts a unit time period and an area in which system congestion does not occur based on the information about the congestion status of the power system acquired from the power transmission and distribution business operator 6 .

The prediction in the market information providing unit 14 can be performed using a prediction model constructed in advance and stored in memory. The predictive model is constructed using an algorithm, such as a neural network, that learns the parameters of the model so as to optimize the performance index of the model.

The market information providing unit 14 uses a prediction model to determine the sales bids received by the P2P power trading market 1 from the planned values of the demand and supply in the power system obtained from retail electricity suppliers, natural factors, and social factors. The total amount of power desired to be sold, the amount of power desired to be sold for a buy bid, and the unit time zone and area in which system congestion does not occur are predicted. The market information providing unit 14 provides the agent 7 with the forecast result as market information.

As described above, the contract processing unit 12 is configured to limit the total quantity of contracts so that the quantity demanded and the quantity supplied match each unit time period. Therefore, in a unit time period in which the amount of power generated by renewable energy increases and the actual value of the supply exceeds the actual value of the demand, the contracted amount is restricted so as to reduce the supply. As a result, the use of renewable energy will be limited.

In the present embodiment, the market information providing unit 14 predicts the total amount of power desired to be sold and the total amount of power desired to be purchased and provides them to the agent 7 . It is possible to procure a large amount of power at a low cost by conducting a buying bid during a unit time period when the total amount is expected to be greater than the total amount of power desired to be purchased and the contract price is expected to be low. As a result, in the unit time period, the demand increases as the supply increases, and the limit on the contract amount is lifted. As a result, a large amount of electric power generated by renewable energy can be procured, and effective utilization of renewable energy can be achieved.

<Agent configuration>
Agent 7 manages bids and contracts of consumers 8 and 9 . FIG. 4 shows an agent 7 that manages bids and contracts for mobile units 200 owned by consumers 8 and 9 . The agent 7 can exchange information with the processing devices (servers) that make up the P2P power trading market 1 via a communication network.

The agent 7 includes a user usage prediction section 70 , a market price prediction section 72 , a charge/discharge plan creation section 74 and a bid processing section 76 . These functional configurations are realized by the CPU executing a predetermined program in the computer device that constitutes the agent 7 .

The user usage prediction unit 70, through an arithmetic processing unit (for example, an ECU (Electronic Control Unit)) provided in the mobile body 200, the operational data (trip information) of the mobile body 200 from the past to the present, the SOC (State of Storage) of the storage battery Of Charge) fluctuation data, connection status data to the charging/discharging equipment 220 at home or office, and other data held inside the mobile object are collected. The user usage prediction unit 70 further collects external information such as climate information such as weather and temperature, and dates and times (weekdays, holidays, presence or absence of events). The user usage prediction unit 70 predicts future usage of the mobile object 200 based on the collected data. The future usage status of the moving object 200 includes, for example, future travel data, connection location of the charging/discharging equipment 220, stop time, and the like.

The market price prediction unit 72 predicts future market prices for each unit time period in the P2P power trading market 1 in an arbitrary manner by referring to market information provided from the P2P power trading market 1 .

The charging/discharging plan creation unit 74 uses the future usage of the mobile unit 200 predicted by the user usage prediction unit 70 and the market price predicted by the market price prediction unit 72 to create a charging/discharging plan for the mobile unit 200. to create Specifically, the charging/discharging plan creation unit 74 searches for the optimum bid conditions that are expected to provide the highest profit for the mobile object 200, and charges the mobile object 200 based on the searched optimum bid conditions. Create a discharge plan.

The charging/discharging plan creation unit 74 first uses the prediction result by the user usage prediction unit 70 to charge the storage battery of the mobile unit 200 per unit time zone when the mobile unit 200 is connected to the charging/discharging facility 220. Detects the amount of chargeable/dischargeable power. The chargeable/dischargeable power amount per unit time period corresponds to the transactable power amount per unit time period. The charging/discharging equipment 220 with which the moving body 200 exchanges electric power is the charging/discharging equipment installed at the consumers 8 and 9 . The tradable electric power amount per unit time period may be detected for each charge/discharge facility of consumers 8 and 9 .

Next, the charging/discharging plan creating unit 74 calculates the chargeable/dischargeable power amount of the storage battery of the moving body 200 with reference to the SOC fluctuation data of the storage battery. The amount of power that can be discharged from the storage battery corresponds to the amount of power from the amount of power stored in the storage battery to the lower limit of the SOC. The amount of power that can be charged in the storage battery corresponds to the amount of power from the amount of power stored in the storage battery to the upper limit value of the SOC. Specifically, the charging/discharging plan creation unit 74 calculates the current storage battery amount detected from the SOC fluctuation data of the storage battery or the predicted value of the future storage battery amount estimated from the SOC fluctuation data. By subtracting the predicted value of the amount of power consumed for traveling of the moving object estimated from the travel data, the amount of chargeable/dischargeable power in the storage battery is calculated.

The charging/discharging plan creation unit 74 further determines, based on the scheduled time that the moving body 200 will stop under the charging/discharging equipment 220 and the charging/discharging speed of the charging/discharging equipment 220 during the stoppage time, the A total amount of power that can be procured between the charging/discharging equipment 220 and the storage battery is calculated.

The charging/discharging plan creation unit 74 finally calculates the smaller of the chargeable/dischargeable power amount in the storage battery and the power amount that can be procured between the charging/discharging equipment 220 and the storage battery as the total transactable power amount. do.

Next, the charging/discharging plan creation unit 74 determines the upper limit of the bidding power amount for the mobile unit 200 for each unit time period. The bidding upper limit value of electric energy for the moving object in each unit time period corresponds to the upper limit value of the electric energy charged/discharged to the storage battery of the moving object 200, which is set for each unit time. Therefore, the power consumption for each unit time period in the bidding conditions for mobile units is determined so as to be equal to or less than the bid power consumption upper limit. Specifically, when the unit time tradable power amount and the total tradable power amount are obtained, the charge/discharge plan creation unit 74 calculates the bidding power amount according to the size of the power consumer's transaction power amount for each unit time period. is allocated, the upper limit of the bidding power amount for each unit time period is determined.

When the upper limit of the bidding power amount for each unit time period is determined, the charging/discharging plan creation unit 74 uses the predicted value of the market price for each unit time period in the P2P power trading market 1 to determine the most Determine bidding conditions to maximize profits. Note that "maximizing profit" means that the loss is minimized when the loss generated in the power trading is larger than the profit.

The charging/discharging plan creation unit 74 calculates the profit and loss that occurs in power trading for each unit time period. This profit or loss includes the costs and incentives incurred in trading electricity. Specifically, the profit and loss generated in power trading includes the profit and loss obtained by multiplying the amount of power traded by the purchase price, as well as the parking fees for mobile vehicles that occur during the transaction, and the power trading. This includes monetary rewards, etc.

Based on the calculated profit/loss, the charging/discharging plan creation unit 74 searches for bidding conditions that maximize the profit for the mobile unit. For searching bidding conditions, for example, an objective function for calculating the cost incurred in power trading is set as an index representing profit or loss in power trading. A search is made for the amount of electric power to be sold or purchased that minimizes the objective function under the constraints on the upper and lower limits of the SOC that should be satisfied in the storage battery of the mobile object (the chargeable/dischargeable range of the storage battery). For the optimization of the objective function, any numerical calculation such as linear programming or convex optimization may be used.

When the optimization process of the objective function is executed and the optimum condition is detected, the market price used for the optimum condition and the desired power amount to be purchased and the desired power amount to be sold found under the optimum condition are submitted to the bid. determined as a condition. A charging/discharging plan for the moving body 200 is created based on the determined bidding conditions.

The bidding processing unit 76 bids for power trading to the P2P power trading market 1 for each unit time period according to the determined bidding conditions. When the bidding in the P2P power trading market 1 is concluded, information to the effect that the contract has been established is received from the P2P power trading market 1 along with information on the contracted amount and the contracted price.

In the P2P power trading market 1, in the unit time period predicted by the market information provision unit 14 in which the planned supply amount exceeds the planned demand amount and in the unit time period and in the area where system congestion does not occur, The processing unit 12 may be configured to change the matching process from the first-come, first-served contract type irregular field method to the renewable energy priority contract type irregular field method. According to this, the agent can be guided to actively select these time zones and regions.

As described above, according to the power trading system according to the present embodiment, the P2P power trading market (power trading device) acquires information on the supply and demand of the power system from the electricity retailers, acquires information indicating the congestion status of the power system from the power system, and based on the acquired power system information, considers the supply and demand balance of the power system and the constraints of the transmission line capacity, and limits the total amount of contracts for P2P power trading. . According to this, the amount of power demanded and the amount of power supplied in the power system can be matched, and system congestion can be avoided, so that the power system can be stabilized.

Based on the acquired power system information, the P2P power trading market is also based on the unit time period in which the total amount of power desired to be sold is expected to exceed the total amount of power desired to be purchased, or the power flow exceeds the operating capacity of the transmission line. To generate information on a unit time period or an area expected to fall and provide it to a consumer. According to this, consumers, through an agent, place purchase bids in unit time periods when it is predicted that the total amount of electricity they wish to sell will be greater than the total amount of electricity they wish to purchase and that the contract price will be low, thereby reducing costs. It will be possible to procure a large amount of electric power. As a result, in the unit time period, the demand increases as the supply increases, and the limit on the contract amount is lifted. As a result, a large amount of electric power generated by renewable energy can be procured, and effective utilization of renewable energy can be achieved.

The embodiments disclosed this time should be considered as examples and not restrictive in all respects. The scope of the present disclosure is indicated by the scope of claims rather than the description of the above-described embodiments, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

1 P2P power trading market, 4 transmission line, 5 electricity retailer, 6 electricity transmission and distribution business operator, 7 agent, 8, 9 consumer, 10 system information input unit, 12 contract processing unit, 14 market information providing unit, 20 CPU , 22 ROM, 24 RAM, 26 HDD, 28 communication I/F, 30 operation unit, 40 communication network, 70 user usage prediction unit, 72 market price prediction unit, 74 charge/discharge plan creation unit, 76 bid processing unit, 200 movement body, 220 charging and discharging equipment, DER distributed power source, ESS power storage device, SM smart meter.

Claims (1)

A power trading device for contracting power trading between a plurality of consumers interconnected to a power system,
a contract processing unit that matches sell bids and buy bids received from the plurality of consumers for each unit time period to execute a contract;
an input unit that receives information on supply and demand of power in the power system and information on congestion status of the power system;
The contract processing unit balances the supply and demand of the power of the power system for each unit time period, and limits the total contract amount so that the power flow is equal to or less than the operating capacity of the transmission line of the power system. configured to
Based on the information received by the input unit, the unit time period in which the total amount of power desired to be sold is expected to exceed the total amount of power desired to be purchased, or the power flow is expected to fall below the operating capacity of the transmission line. An electric power trading apparatus, further comprising a providing unit that generates information about a unit time period or an area and provides the information to the plurality of consumers.

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