JP2007094732A - Power transaction control system, power transaction control method and power transaction control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain power transaction according to the transition of a storage power or the demand of a storage power. <P>SOLUTION: This power transaction control system is configured of a storage device registration part 110 for accepting the attribute information of a power storage device 10, and for storing it in a power storage device registration database 125; a storage information acquisition part 111 for acquiring the storage electric energy of the power storage device 10 from the management device 11 of the power storage device 10, and for storing it in a storage electric energy database 126; a device specification part 112 for receiving transaction request electric energy from a client terminal 200, and for collating the transaction request electric energy with a storage electric energy database 126, and for specifying the power storage device 10 satisfying the transaction request electric energy; a candidate transmission part 113 for extracting the attribute information of the power storage device 10 from a power storage device registration database 125, and for transmitting it to the client terminal 200; and a transaction execution part 114 for receiving transaction information corresponding to the power transaction destination candidate information from the client terminal 200, and for executing transaction processing with a retail company terminal 300 for selling the storage power of the power storage device 10 and the client terminal 200. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a power transaction control system, a power transaction control method, and a power transaction control program. In particular, the present invention relates to a power trading computer system related to a power retail transaction for a power storage device having a function of linking power from a generator whose power output fluctuates rapidly to a grid in a computer system that retails electricity.

  As a conventional power trading system, there is a power trading system introduced in a wholesale power exchange. There are two types of markets that are provided by the power trading system: the forward fixed market and the spot market. The former product configuration is a 24-hour monthly type and a daytime monthly type, and each assumes a block transaction in units of 30 minutes and 1 MW. For the latter, block transactions are assumed in units of 1 MW in 30-minute units for next day delivery. Market participants are power retailers such as specific scale electric power utilities (PPS) with power plants. Unlike a self-developed business operator, this retail supply business operator has a so-called simultaneous equal obligation, and adjusts the supply and demand with a power source for adjustments procured by the retail business operator.

As conventional techniques of power transaction brokerage, for example, a step of registering a transaction applicant who desires a power transaction in advance as a registered member, a step of authenticating whether or not the transaction applicant is the registered member, and the registered member Providing the transaction applicant authenticated as power transaction information regarding power transaction, receiving an order regarding power transaction from the registered member, and based on the power transaction information, the registered member A power transaction mediation method comprising: setting a transaction according to an order; and, when a transaction between the registered members is completed, filing the content of the completed transaction as a power transaction file (Patent Document) 1) is proposed.
JP 2002-56225 A

  By the way, as a power source assumed in the power transaction, a power plant whose output can be roughly adjusted according to the transaction. On the other hand, there is power generated by wind power generation or solar power generation as energy that is desired to be expanded as renewable energy. However, even if such wind power generation is assumed as the target power in the power transaction, the power generation output is affected by the air volume, the amount of sunlight, and the like, so that it is difficult to control the power generation amount and the introduction is difficult. In addition, when connecting to the grid, power cannot be transmitted beyond the range in which the output can be adjusted, and it is difficult to trade in the same way as power products handled at the above exchanges.

  Therefore, for wind power generation, power storage devices such as sodium-sulfur (NAS) batteries, redox flow batteries, and sealed lead-acid batteries are installed at power plant sites in order to mitigate the effects of output fluctuations when connecting to the grid. In addition to this, a method is adopted in which the output fluctuation is limited to a certain level and connected to the grid.

  However, the current power trading system is a system constructed with a standard power plant as a power generation entity, and there is a problem that it is difficult to take in a transaction targeting power from a storage device. In addition, the supply amount of the storage amount easily fluctuates due to the output fluctuation characteristics of a wind power generator, a solar power generation device, etc., and no means or configuration has been adopted for performing transactions based on the real-time value of the storage capacity.

  In addition, power storage devices for interconnection measures such as wind power generation and solar power generation have a relatively small capacity for the purpose of time shift by capacity, and power purchasers can combine power from multiple power storage devices. It is thought that the number of procurement will increase. For this reason, not only covers demand with a simple combination of conventional backup supply and power supply from a power retailer, but also confirms and purchases the total output while comparing the combined capacity of multiple storage devices. It is envisaged that it will also be necessary to provide support tools for retail transactions.

  Therefore, the present invention has been made in view of the above problems, and a power transaction control system that enables simple and reliable power transactions according to the transition of stored power in a power storage device, combined demand for stored power, and the like. The main object is to provide a transaction control method and a power transaction control program.

  The power transaction control system of the present invention that solves the above problems is a system that controls power transactions between a power retailer and a consumer, receives attribute information of a power storage device from an input interface, Storage information acquisition that stores in the power storage device registration database, the storage device registration unit and the information on the stored power amount of the power storage device from the management device of the power storage device, and stores it in the stored power amount database A storage power amount storage device that receives information on the desired power amount for transaction from the consumer terminal, matches the information on the desired power amount for transaction with the stored power amount database, and satisfies the desired power amount for transaction The device identification unit to be identified and the attribute information of the identified power storage device are extracted from the power storage device registration database, and this information is obtained as the power acquisition destination candidate information. As a candidate transmission unit that transmits the transaction information corresponding to the power supplier candidate information from the customer terminal, and according to the transaction information, sells the stored power of the power storage device. A transaction execution unit that executes transaction processing between the responsible retailer terminal and the customer terminal.

  Further, in the power transaction control system of the present invention, the storage information acquisition unit acquires the current value of the stored power amount in the power storage device from the management device of the power storage device, and stores this in the stored power amount database. And the candidate transmitter extracts a current value of the stored power amount for the specified power storage device from the stored power amount database, and predicts the stored power amount until a predetermined time after the stored power amount. Is determined based on any of the past storage energy change history, storage device specifications, or a predetermined prediction algorithm, and the information on the current value and the predicted value is transmitted to the customer terminal. This is preferable.

  Further, in the power transaction control system of the present invention, the device specifying unit collates the information on the desired transaction power amount with the stored energy amount database, and the desired transaction energy amount is stored in a plurality of power storage devices. The customer is stored in an appropriate storage device, with the candidate transmitting unit specifying combination information of the stored power amount of the specified power storage device group. It is preferable that the graph data set on the same coordinate axis of the past or planned power usage curve is generated and this graph data is transmitted to the customer terminal.

  Further, the power transaction control system of the present invention extracts a current value of the stored power amount of the power storage device from the stored power amount database, and stores the power storage device whose current value is insufficient for a specified stored power capacity. A device registration deletion unit that identifies the unusable storage device and deletes the registration of the unusable storage device in the power storage device registration database or associates the unusable status with the corresponding record, and storage of the unusable storage device Extract the current value of energy from the stored energy database, detect that this current value satisfies the specified stored power capacity, and re-register this unavailable storage device in the energy storage device registration database Alternatively, it is preferable that the apparatus includes a device re-registration unit that associates an available status with the corresponding record.

  The power transaction control method of the present invention is a method for controlling power transactions between a power retailer and a consumer by a computer, wherein the computer receives attribute information of the power storage device from an input interface. , Store this in the power storage device registration database, get the information on the stored power amount of the power storage device from the management device of the corresponding power storage device, store it in the stored power amount database, and wish to trade from the customer terminal Receiving information on the amount of electric power, collating the information on the desired electric energy for transaction with the stored electric energy database, specifying the electric power storage device with the electric energy that satisfies the desired electric energy for transaction, and specifying the specified electric power storage device Is extracted from the power storage device registration database, this information is transmitted to the customer terminal as power acquisition destination candidate information, and the power The transaction information corresponding to the supplier candidate information is received from the customer terminal, and the transaction process between the retail company terminal responsible for selling stored power of the power storage device and the customer terminal is executed according to the transaction information. It is characterized by.

  The power trading control program of the present invention is a program for causing a computer to execute a power trading control method between a power retailer and a consumer, and accepts attribute information of the power storage device from an input interface. Storing the information in the power storage device registration database, obtaining information on the stored power amount of the power storage device from the management device of the power storage device, and storing the information in the stored power amount database; Receiving information on the desired electric energy from the home terminal, collating the information on the desired electric energy with the stored electric energy database, and identifying a power storage device of the stored electric energy that satisfies the desired electric energy; The attribute information of the specified power storage device is extracted from the power storage device registration database, and this information is obtained The information is transmitted to the consumer terminal as information, and the transaction information corresponding to the power supplier candidate information is received from the consumer terminal, and the retailer responsible for selling the stored power of the power storage device according to the transaction information Executing transaction processing between the company terminal and the customer terminal.

  In addition, the problems disclosed by the present application and the solutions thereof will be clarified by the embodiments of the present invention and the drawings.

  ADVANTAGE OF THE INVENTION According to this invention, the simple and reliable electric power transaction according to transition of the stored electric power in an electric power storage apparatus, the combination demand of stored electric power, etc. is attained.

--- System configuration ---
Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a network configuration diagram including a power transaction control system 100 in the present embodiment. The power transaction control system 100 (hereinafter, system 100) of the present invention reads the program 102 stored in the program database 101 such as a rewritable memory to the memory 103 so as to realize the function of executing the power transaction control method of the present invention. It is executed by the CPU 104 which is an arithmetic unit.

  In addition, the system 100 includes various keyboards and buttons generally provided in a computer device, an input / output interface 105 such as a display, and communication means for exchanging data with the customer terminal 200, the retail company terminal 300, and the like. 106 or the like.

  The system 100 uses the communication means 106 to connect to the power consumer terminal 200 and the retail company terminal 300 through the network 140 such as the Internet, a LAN, or a serial interface communication line, and execute data exchange. Between the various functional units of the system 100 and the communication means 106, the I / O unit 107 executes data buffering and various mediation processes.

  The electric power consumer terminal 200 and the retail company terminal 300 also read a program stored in a program database such as a rewritable memory into a memory as a computer and execute it by a CPU that is a computing device. In addition, it includes an input / output interface that is generally provided in a computer device, and communication means for exchanging data with the system 100 and the like. Further, the I / O unit performs data buffering and various mediation processing between the various functional units and the communication means.

  Next, functional units that are configured and held by the system 100 based on the program 102 will be described. Note that the system 100 includes a power storage device registration database 125 and a stored power amount database 126.

  The system 100 includes a storage device registration unit 110 that receives attribute information of the power storage device 10 from an input interface and stores it in the power storage device registration database 125.

  In addition, the system 100 includes a storage information acquisition unit 111 that acquires information on the stored power amount of the power storage device 10 from the management device 11 of the power storage device 10 and stores the information in the stored power amount database 126. The management device 11 is assumed to be a computer that monitors the amount of power stored in the power storage device 10 and stores and manages the current value in an appropriate storage device. Of course, it is assumed that the management apparatus 11 and the system 100 are connected by an appropriate network.

  Further, the system 100 receives information on the desired electric energy from the customer terminal 200, collates the information on the desired electric energy with the stored electric energy database 126, and stores the electric energy that satisfies the desired electric energy. The device specifying unit 112 for specifying the power storage device 10 is provided.

  Further, the system 100 extracts the attribute information of the identified power storage device 10 from the power storage device registration database 125, and transmits this information to the customer terminal 200 as power acquisition destination candidate information, the candidate transmission unit 113 Is provided.

  Further, the system 100 receives transaction information corresponding to the power supplier candidate information from the customer terminal 200, and according to the transaction information, the retail company terminal 300 responsible for selling stored power of the power storage device 10 and The transaction execution part 114 which performs the transaction process between the customer terminals 200 is provided.

  Further, the storage information acquisition unit 111 of the system 100 acquires the current value of the stored power amount in the power storage device 10 from the management device 11 of the power storage device 10 and stores it in the stored power amount database 126. If it is, it is suitable. Of course, the management device 11 is connected to a network-compatible storage energy meter (installed in each power storage device 10) that detects the stored power amount of the power storage device 10 that it manages in real time. Data on the current value of the stored electric energy obtained from the meter is stored in an appropriate storage device. Then, in response to a request from the system 100 (for example, including the ID of the power storage device 10), the corresponding data is extracted from this storage device and returned.

  In this case, the candidate transmission unit 113 extracts the current value of the stored power amount for the specified power storage device 10 from the stored power amount database 126, and stores the stored power amount up to a certain time after the stored power amount. Predicted values are defined as specifications for past storage energy changes (that is, it is determined that the stored energy changes with the same trend as the past change history), storage device specifications (eg, specifications for each power storage device in advance) And the information on the current value and the predicted value is transmitted to the customer terminal 200.

  In addition, the device specifying unit 112 of the system 100 collates the information on the desired electric energy for transaction with the stored electric energy database 126 and fills the desired electric energy with the electric energy stored in the plurality of electric power storage devices 10. It is preferable to specify the power storage device group in the case. In this case, the candidate transmission unit 113 uses the same coordinate axis of the past or planned power usage curve of the consumer stored in the appropriate storage device as the combination information of the stored power amount of the specified power storage device group. The graph data set above is generated, and this graph data is transmitted to the customer terminal 200.

  Further, the system 100 extracts the current value of the stored power amount of the power storage device 10 from the stored power amount database 126, and the power storage device 10 whose current value is insufficient for the specified stored power capacity cannot be used. It is preferable to provide a device registration deletion unit 115 that is specified as a storage device and deletes the registration of the unusable storage device in the power storage device registration database 125 or associates the unusable status with the corresponding record.

  Further, the system 100 detects the current value of the stored power amount of the unusable storage device from the stored power amount database 126, and detects that the current value satisfies a specified stored power capacity, It is preferable to provide a device re-registration unit 116 that re-registers this unusable storage device in the power storage device registration database 125 or associates a status of availability with the corresponding record.

  Note that each of the functional units 110 to 116 in the system 100 shown so far may be realized as hardware, or may be realized as a program stored in an appropriate storage device such as a memory or an HDD (Hard Disk Drive). Good. In this case, the CPU 104 reads the corresponding program from the storage device into the memory 103 and executes it in accordance with the execution of the program.

  In addition to the Internet and LAN, the network 140 includes various types such as an ATM line, a dedicated line, a WAN (Wide Area Network), a power line network, a wireless network, a public line network, a mobile phone network, and a serial interface communication line. A network can also be adopted. If a virtual private network technology such as VPN (Virtual Private Network) is used, communication with improved security is established when the Internet is adopted. The serial interface refers to an interface for connecting to an external device by serial transmission that sequentially transmits data bit by bit using a single signal line, and RS-232C, RS-422, IrDA, USB, IEEE 1394, fiber channel, etc. can be assumed.

--- Database structure ---
Next, the structure of the database used by the system 100 in this embodiment will be described. FIG. 2 is a diagram illustrating data structure examples of (a) a power storage device registration database and (b) a stored power amount database in the present embodiment.

  The power storage device registration database 125 is a database that stores power storage device attribute information that the system 100 has received from the input interface via the retail company terminal 300, the management device 11 of the power storage device 10, or the like. For example, using the management number of the power storage device 10 as a key, the administrator name, storage capacity (“rated storage power amount (kWh) that can be stored in the power storage device)”, installation location of the power storage device 10, power supply type (wind power , A fuel cell, a power generation method such as biomass), a battery type (a battery type such as a NAS battery or a redox flow battery), and the like.

  The stored power amount database 126 is a database that stores information on the stored power amount of the power storage device 10 acquired by the system 100 from the management device 11 of the power storage device 10, for example, management of the power storage device 10. A record that associates information such as supply destination (including status such as being stored), capacity ratio (degree of full charge), real-time data of stored energy (may be an estimated value per predetermined time), etc., using numbers as keys It is an aggregate of.

--- Trends in power consumption and power storage devices ---
Next, the trend of the amount of power used and the power storage device 10 will be outlined. FIG. 3 is an explanatory diagram of the power storage device 10. As shown in the daily load curve for the daily usage of electricity in FIG. 3 (a), the nighttime power demand is usually lower than the daytime power demand. Therefore, the power storage device 10 may be utilized so that the power generated by the wind power generator or the like at night can be used in the daytime. However, at night, the adjustment power source for controlling fluctuations in the power system is also insufficient, so it is difficult to transmit power through the system. As shown in FIG. 3B, the power storage device 10 is installed at the power generation site. Will be installed.

  For wind power generation, for example, in order to mitigate the effects of output fluctuations when connecting to the grid, a combination of a storage battery for adjustment such as a sodium-sulfur (NAS) battery, a redox flow battery, a sealed lead-acid battery and the inverter 5 is combined. The power storage device 10 is installed at a power plant site such as the wind power generator 7. In this way, a method is adopted in which the output fluctuation is limited to a constant value and linked to the power system 6.

  When conducting a power transaction of power derived from such a power storage device 10, since the replenishment of the storage amount fluctuates due to the output fluctuation of the wind power generator, the power supply from the power plant that continuously controls and sells the electric output as in the past It is considered that it is easier to trade by applying a repetitive trading system in units of rated storage capacity for a certain time instead of the power trading method (see FIG. 3C).

---- Overview of the electricity trading market ----
Next, the power trading market will be outlined. FIG. 4 shows an overview of the power trading market. This figure shows the relationship between a power generation company 1 having a power plant using renewable energy such as wind power, a consumer 2 who considers purchasing power, a power retailer or brokerage company 3, and a power transmission service department 4 of the power company. Has been. FIG. 5 is an explanatory diagram of an operation flow of the power transaction control system.

  In these figures, the flow of information on the power product is implemented as follows through the power transaction control system 100. A power generation company 1 using renewable energy such as wind power sells electric power generated from renewable energy. When the consumer 2 considers the procurement of electric power using renewable energy such as wind power, the electric power retailer that can provide electric power products corresponding to the time zone and electric energy required for the plan using the customer terminal 200 Search for company 3. For this reason, the power purchase company 3 is notified of the power purchase specification information.

  On the other hand, the power retailer or brokerage company 3 lists the power storage devices 10 that store the power derived from renewable energy such as wind power, and the attribute of the power storage device 10 is stored in the power storage device registration database 125 of the system 100. Information (administrator, storage amount, etc.) is registered in advance. The stored power amount of each power storage device 10 is stored in the stored power amount database 126. Information stored in the power storage device registration database 125 and the stored power amount database 126 is output in response to a request from each customer terminal 200. Of course, it is assumed that the attribute information of the power storage device 10 is registered in advance by each power generation company 1 with respect to the power retailer 3.

  The power retailer 3 searches the power storage device registration database 125 for the power storage device 10 according to the purchase specification information. In this search, information on the stored power amount in the power storage device 10 is acquired at regular intervals, and the power storage device 10 having a stored power amount that satisfies the power amount indicated in the purchase specification is searched for. If an appropriate power storage device 10 is specified as a result of the search, the power retailer 3 offers the customer 2 a supply contract including the information. The customer 2 that has received this offer informs the power retailer 3 about the agreement and conditions for the supply contract offer, and if the agreement is reached, the contract is established.

  On the other hand, the power retailer 3 makes a reservation for a consignment contract with the power transmission service department 4 of the power company when applying for a supply contract. In this process, the power retailer (or intermediary company) 3 has jurisdiction over the power transmission procedure for the amount of power transmitted from the power generation company 1 to the customer 2 via the public line information network 5 based on the contract. To the power transmission service department terminal 400 of the power company in advance (to secure the power transmission path).

  The electric power product is actually supplied as follows based on the establishment of a contract in the electric power transaction control system 100. The power generation company 1 connects the power of the installed power storage device 10 to the power system 6 in the daytime based on a contract with the customer 2. And the process which transmits the electric energy based on the said contract to the consumer 2 via the electric power grid | system 6 is made | formed by the power consignment process which the power transmission service department of the said electric power company provides. Thus, the consumer 2 receives the electric power using renewable energy such as wind power supplied from the power generation company 1 through the electric power system 6. The consumer 2 pays a fee to the power retailer 3 after consuming the scheduled amount of received power. On the other hand, in the power storage device 10, after the stored power is discharged in accordance with the contract, the recharging operation by the operation of the wind power generator is performed at night. Further, during the daytime of the next day, the power charged at night in the power storage device 10 becomes a transaction object. That is, the power storage device 10 repeatedly discharges and charges in a day / night cycle.

--- Processing flow example ---
Hereinafter, the actual procedure of the power transaction control method in the present embodiment will be described with reference to the drawings. Various operations corresponding to the power transaction control method described below are realized by a program 102 that the system 100 reads into the memory 103 and executes. And this program 102 is comprised from the code | cord | chord for performing the various operation | movement demonstrated below.

  FIG. 6 is a flowchart showing an actual procedure of the power transaction control method. In the description here, the details of the general contract procedure and the like of the power transaction are the same as the contents described in the outline of the power transaction market, and will be omitted. In this flow, the storage device registration unit 110 of the system 100 receives attribute information of the power storage device 10 managed by the retail company terminal 300 from the retail company terminal 300 via, for example, the network 140 (s100). In this case, the system 100 periodically accesses the management device 11 from the retail company terminal 300 to acquire information such as an appropriate database for managing the information of the power storage device 10, and the self-confidence power storage device registration database 125. The data may be synchronized. Alternatively, the attribute information of the power storage device 10 may be periodically uploaded to the system 100 from the retail company terminal 300 (s001). The attribute information of the power storage device 10 acquired in this way is stored in the power storage device registration database 125 by the system 100 (s101).

  Further, the storage information acquisition unit 111 of the system 100 acquires information on the stored power amount of the power storage device 10 from the management device 11 of the power storage device 10 via the network 140 (s002, s102), and stores this. It stores in the electric energy database 126 (s103). The management device 11 is assumed to be a computer that monitors the amount of power stored in the power storage device 10 and stores and manages the current value in an appropriate storage device. Of course, it is assumed that the management apparatus 11 and the system 100 are connected by an appropriate network. Here, it can be assumed that the information on the stored power amount acquired by the storage information acquiring unit 111 is the current value of the stored power amount in the power storage device 10. In this case, of course, the management device 11 is connected to a network-compatible storage energy meter (installed in each power storage device 10) that detects the stored power amount of the power storage device 10 that it manages in real time. Data on the current value of the stored electric energy obtained from the stored electric energy meter is stored in an appropriate storage device. Then, in response to a request from the system 100 (for example, one including the ID of the power storage device 10), the corresponding data is extracted from this storage device and returned.

  Subsequently, the device specifying unit 112 of the system 100 receives information on the desired amount of power from the customer terminal 200, that is, the power purchase specification information (s104). Prior to this reception, it is assumed that the customer terminal 200 accepts the input of the power purchase specification information from the customer using the power storage device search screen 700 as shown in FIG. This screen 700 includes an interface 701 for selecting conditions such as purchase capacity and power source type (wind power or sunlight). Further, as will be described in detail later, an interface 702 for accepting a request for calculation of information on electricity bills and carbon dioxide emissions, which is reduced as compared with the past by using electric power originating from renewable energy such as wind power and sunlight. Prepare. The input information on the screen 700 is transmitted from the customer terminal 200 to the system 100 as power purchase specification information (s003).

  Then, the system 100 collates the power purchase specification information with the stored power amount database 126, and specifies the power storage device 10 having the stored power amount that satisfies the desired transaction power amount (s105). Since the stored power amount database 126 stores the current value of the stored power amount of the power storage device 10 as described above, if a search is performed using the numerical value of the desired power amount as a keyword, storage exceeding the value is stored. The power storage device 10 having the amount of electric power can be specified.

  Next, the candidate transmission unit 113 of the system 100 extracts attribute information of the identified power storage device 10 from the power storage device registration database 125 using, for example, the management number of the power storage device 10 as a key (s106). ), And transmits this information to the customer terminal 200 as power acquisition destination candidate information (s107).

  FIG. 8 is a diagram showing a subflow example 1 in the present embodiment. When generating this power acquisition destination candidate information, for example, the candidate transmission unit 113 extracts the current value of the stored power amount for the specified power storage device 10 from the stored power amount database 126 (s180). Then, the predicted value of the stored energy until a certain time is displayed in the same trend as the past history of changes in the past stored energy (that is, daily changes, time changes, changes according to the season, temperature, etc.). Specified based on either the storage power amount transition), the specifications of the storage device (eg, the rate of change in the stored power amount that is defined in advance for each power storage device), or a predetermined prediction algorithm (S181) and included in the power acquisition destination candidate information (s182). Such power acquisition destination candidate information includes, for each of the specified power storage devices 10, data attached in graph format indicating changes in the stored power amount (current value and predicted value) with respect to the time axis, for example. Can be assumed. And the candidate transmission part 113 transmits such electric power acquisition destination candidate information to the said customer terminal 200 similarly to the above.

  The customer terminal 200 receives such power acquisition destination candidate information in the same manner as described above (s004), and displays it on an appropriate output interface (s005) to be used for browsing by the customer. The consumer can browse the power acquisition destination candidate information and determine whether or not the power storage device 10 included in the power acquisition destination candidate information is a power storage device that can obtain desired power.

  FIG. 9 is a diagram illustrating a display screen example of power acquisition destination candidate information. As shown in this figure, the screen 800 of the power acquisition destination candidate information displayed on the customer terminal 200 includes a management number, a manager (power generation company), an installation location, and a storage capacity (storage device) of the power storage device 10. Information), information on the type of power source (type of renewable energy), and the like. Further, the screen 800 displays real-time data of the power storage amount together with, for example, what percentage of the storage capacity of the power storage device 10 or the stored power amount. In FIG. 9, only one power storage device 10 is shown as power acquisition destination candidate information, but information on a plurality of power storage devices 10 may be listed and shown.

  The customer terminal 200 receives the transaction information specified by the customer according to the electric power acquisition destination candidate information indicated in this way, and returns it to the system 100 (s006). The transaction execution unit 114 of the system 100 receives transaction information corresponding to the power supplier candidate information from the customer terminal 200 (s108), and sells stored power of the power storage device 10 according to the transaction information. Transaction processing between the responsible retailer terminal 300 and the customer terminal 200 is executed (s109). This transaction process is similar to a general electronic commerce service. For example, when a retail company terminal 300 is instructed to receive the transaction conditions for the transaction conditions such as the amount, quantity, and delivery date from the customer terminal 200, It is considered that the transaction has been completed, contract data is generated and transmitted to both parties. Both the consumer and the retail company transmit / receive the stored power of the power storage device 10 according to the contract data.

  FIG. 10 is a diagram illustrating an example of a subflow in the present embodiment. On the other hand, when discharge from the power storage device 10 is performed based on such a contract, the stored power amount of the power storage device 10 naturally decreases with time. If the discharge is continued as it is, the timing at which it is necessary to stop the discharge at a certain time and start charging according to the characteristics of the power storage function of the power storage device 10 comes. Therefore, the device registration deletion unit 115 of the system 100 extracts and monitors the current value of the stored power amount of the power storage device 10 from the stored power amount database 126 (s115), while the current value is the specified stored power. The power storage device 10 whose capacity is insufficient is specified as an unusable storage device (s116). Further, the registration of the unusable storage device in the power storage device registration database 125 is deleted, or the unusable status is associated with the corresponding record (s117). By doing so, even if the power storage device 10 does not have a sufficient amount of stored power, a situation in which it can be searched as a response to a request from a consumer does not occur.

  The power storage device 10 thus removed from the registration in the power storage device registration database 125 receives charging from a wind power generator or the like, and still gradually recovers the stored power amount. Therefore, the device re-registration unit 116 of the system 100 extracts the current value of the stored power amount of the unusable storage device from the stored power amount database 126 (s118), and this current value satisfies the specified stored power capacity. It is detected that it is to be performed (s119). Here, the unusable storage device that satisfies the specified stored power amount is re-registered in the power storage device registration database 125, or a usable status is associated with the corresponding record (s120).

  Thus, by updating the registration in the power storage device registration database 125 according to the stored power amount in the power storage device 10, it is possible to reliably cope with the temporal change in the stored power amount unique to the power storage device.

--- Transaction support processing 1 ---
Next, a description will be given of a support function in a case where the amount of power stored in the plurality of power storage devices 10 is combined with the amount of power desired to be purchased and satisfied. FIG. 11 is a diagram illustrating a support screen example 1, and FIG. 12 is a diagram illustrating a support screen example 2. Here, the retail company terminal 300 of the electric power retail company 3 obtains a demand prediction curve 901 representing the transition of the amount of power used by the customer 2 for a certain period from the customer terminal 200 or the past for each customer. It is assumed by itself based on information such as the power consumption history. The curve 901 is combined with the stored power amount of the power storage device 10 that can be purchased at present to form integrated graph data 910 (FIG. 11).

  FIG. 13 shows a subflow example 3 in the present embodiment. For this purpose, the device specifying unit 112 of the system 100 collates the information on the customer's desired transaction power amount with the stored energy database 126 (s200), and determines the desired transaction energy amount of the plurality of power storage devices 10. A power storage device group to be charged with the stored power amount is specified (s201). In this specification, for example, power storage devices that satisfy the desired transaction power amount are selected by adding together a plurality of stored power amounts equal to or less than the desired transaction power amount. In the example illustrated in FIG. 11, the power storage device A (10 × 8 = 80 kwh) and the power storage device B (5 × 12 = 60 kwh) are selected as the power storage device group.

  Further, the candidate transmission unit 113 stores the combination information 902 of the stored power amount of the specified power storage device group in the past or planned power usage curve 901 of the customer 2 stored in an appropriate storage device. Graph data 910 set on the same coordinate axis is generated (s202), and the graph data 910 is transmitted to the customer terminal 200 (s203).

  Further, as shown in FIG. 12, the device specifying unit 112 compares the maximum demand at the time of power purchase based on the demand prediction with the maximum demand before power supply, while keeping the capacity of the power storage device 10 constant, It is also possible to perform the process of making the combination information of the stored electric energy, that is, the electric energy distribution into a shape that minimizes the maximum demand value that is the base of the basic charge. Thereby, a more appropriate combination of the power storage devices 10 can be specified. Further, it is possible to determine the distribution shape of the stored power in accordance with the purchase request by making the power amount distribution as flat as possible and facilitating the power adjustment control.

--- Transaction support processing 2 ---
Next, as described above with respect to the screen 700 in FIG. 7, the electricity charges and the carbon dioxide emissions are reduced by using electric power originating from renewable energy such as wind power and sunlight. The calculation process will be described. Such a process is executed, for example, upon designation by the interface 702 on the screen 700.

  The consumer 2 who is not only the power retail company 3 but also the power purchaser accesses the system 100 with the consumer terminal 200, selects purchase conditions in the power storage device registration database 125 provided by the power retail company 3, Search processing can also be performed.

  Here, as a service provided to the consumer 2 who wishes to purchase power, the system 100 determines the current power rate based on the price of the purchased power (generated based on renewable energy) selected by the consumer 2. The amount of electricity charge reduction, which is the difference between the two, is calculated. Further, the amount of carbon dioxide emission reduction is calculated based on the electric power selected by the customer 2. Furthermore, assuming the purchased power amount of the customer 2, the remaining system power amount from the demand prediction of the system power is calculated. These processes are called reduction amount evaluation.

Next, calculation processing executed in the reduction amount evaluation is shown below. FIG. 14 is an explanatory diagram of a calculation procedure of the reduction amount evaluation process. First, in the calculation process of the system power reduction amount, demand forecast data and contract power as current contract conditions are used as input information from the outside. Here, Expression 1 is an expression for calculating the reduction amount of the system power.
Formula 1:
Grid power reduction amount for the current month = Max (Demand forecast power value of the day, current contract power)-Grid power

As shown in Equation 1, the processing here compares the demand forecast value with the current contract power, and subtracts the actual grid power from the larger one.

Equation 2 is also an equation for calculating the amount of power reduced from the grid power, but is based on the idea that the amount of power from the grid is reduced by the amount of stored power supplied.
Formula 2:
(Reduce system power for the current month) = Σ (Supply power supply for the day) --- (Total for January)

This formula 2 calculates the amount of power reduction from the monthly system power by accumulating the amount for one month based on the daily amount of power reduction. The calculation result obtained in this way is the grid power reduction amount and is used as a base for calculating the basic rate reduction amount among the electricity rate reduction amounts.

  In addition, in the calculation process of the power charge reduction amount, as input information from the outside, the basic charge rate and the metered charge rate, the stored power purchase charge, and the real-time stored power amount data of the power storage device 10 are obtained from the data of the power charge menu. Based on this, the supply power from the stored power is calculated, and the electricity charge reduction amount is calculated.

Formula 3 is a formula for calculating the power charge reduction effect.
Formula 3:
Basic charge (reference) = Max (demand forecast power, current contract power) x basic charge rate Basic charge (trial calculation) = Max (system power maximum value) x basic charge rate Basic charge reduction = basic charge (standard)-basic charge (Estimate)
Electricity charge reduction amount = Σ (stored power supply amount for the day) x metered charge rate (stored electricity charge for the current month) = Σ (stored power supply amount for the current day) × pay-per-use rate-(-January total)
Electricity charge reduction from the grid = Electricity charge reduction + Basic charge reduction-Storage power charge

This formula for calculating the power charge reduction amount is obtained by subtracting the purchase charge of stored power from the sum of the basic charge reduction amount and the power charge reduction amount.

In addition, in the process of calculating the carbon dioxide emission reduction amount, the supply amount of stored power is multiplied by the carbon dioxide emission basic unit (gCO2-kwh) using the carbon dioxide emission basic unit (gCO2-kwh) data obtained from the outside. To calculate the carbon dioxide emission reduction effect. Expression 4 is an expression for calculating the carbon dioxide emission reduction effect.
Formula 4:
Carbon dioxide emission reduction effect = Grid power reduction x Carbon dioxide emission intensity

Since the stored power supplied to the customer 2 by the contract does not emit carbon dioxide, the carbon dioxide emission basic unit ( Equation 4 is obtained by multiplying gCO2-kwh).

---- Group management of power storage devices ---
When the power storage devices 10 to be managed increase, it is desired to perform management in groups. In such a case, the system 100 preferably provides the group management screen 1200 (FIG. 15) of the power storage device 10 to the retail company terminal 300. If the power storage device 10 that is the target of the power product has a relatively small capacity, it is considered easier to manage the power storage devices 10 at a plurality of sites on one screen. Therefore, the system 100 sets the group management screen 1200 that displays the management number and the current power storage information by collecting the contents of the individual management screens. When this screen 1200 is used as an introduction unit and linked to an individual management screen, the power retailer 3 can easily manage the screen.

  When managing the power storage devices 10 at a plurality of sites on one screen, the capacity of the entire group and the current free capacity are displayed on the screen 1300 (see FIG. 16A), and at the same time, each individual power The free capacity of the storage device 10 is displayed on the screen 1310 (see FIG. 16B).

  Also, based on the power storage device registration database 125, the management number of the power storage device 10 that is the target of the power product, the installer (power generation company), the installation location, the amount of power stored in the power storage device, and the renewable energy The type or the like may be displayed on the screen 1400 (see FIG. 17A). In this case, the current storage status as the real-time data of the power storage amount, for example, information on what percentage of the storage capacity in the power storage device 10 is stored, and information such as the estimated stored power amount are also displayed on the screen 1410. (See FIG. 17B).

  ADVANTAGE OF THE INVENTION According to this invention, the electric power retail transaction system which can trade the electric power by the electric power generation system which arrange | positions storage power apparatuses, such as solar power generation and wind power generation, simply and efficiently can be provided. Accordingly, it is possible to increase the number of power generation methods using renewable energy such as solar light and wind power, and increase the retail transaction volume of the generated power.

  In addition, dealing with the fact that the replenishment status of the storage amount is likely to fluctuate due to the output fluctuation characteristics of a wind power generator, a solar power generation device, etc., it becomes possible to conduct transactions based on the real-time value of the storage capacity. Further, it is possible to provide a retail transaction support tool that allows a user to check the total output while comparing the combined capacity of a plurality of storage devices and purchase power.

  Therefore, simple and reliable power transactions according to the transition of stored power in the power storage device, the combined demand of stored power, and the like are possible.

  As mentioned above, although embodiment of this invention was described concretely based on the embodiment, it is not limited to this and can be variously changed in the range which does not deviate from the summary.

It is a network block diagram including the electric power transaction control system in this embodiment. It is a figure which shows each data structure example of (a) electric power storage apparatus registration database and (b) stored electric energy database in this embodiment. It is explanatory drawing of an electric power storage apparatus. An overview of the electricity trading market. It is explanatory drawing of the operation | movement flow of an electric power transaction control system. It is a flowchart which shows the actual procedure of the electric power transaction control method. It is explanatory drawing of an electric power storage apparatus search screen. It is a figure which shows the subflow example 1 in this embodiment. It is a figure which shows the example of a display screen of electric power acquisition destination candidate information. It is a figure which shows the subflow example 2 in this embodiment. It is a figure which shows the example 1 of assistance screens. It is a figure which shows the support screen example 2. FIG. It is a figure which shows the example 3 of a subflow in this embodiment. It is explanatory drawing of the calculation procedure of a reduction amount evaluation process. It is a figure which shows the group management screen example 1. FIG. It is a figure which shows the example 2 of a group management screen. It is a figure which shows the example 3 of a group management screen.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Power storage apparatus 11 Power storage apparatus management apparatus 100 Power transaction control system 101 Program database 102 Program 103 Memory 104 CPU
105 I / O Interface 106 Communication Means 107 I / O Unit 110 Storage Device Registration Unit 111 Storage Information Acquisition Unit 112 Device Identification Unit 113 Candidate Transmission Unit 114 Transaction Execution Unit 115 Device Registration Deletion Unit 116 Device Reregistration Unit 125 Power Storage Device Registration Database 126 Stored energy database 140 Network 200 Customer terminal 300 Retail company terminal

Claims (6)

A system for controlling power transactions between a power retailer and a consumer,
A storage device registration unit that receives attribute information of the power storage device from the input interface and stores it in the power storage device registration database; and
A storage information acquisition unit that acquires information on the stored power amount of the power storage device from the management device of the corresponding power storage device and stores it in the stored power amount database;
Receiving information on the desired electric energy from the customer terminal, collating the information on the desired electric energy with the stored electric energy database, and specifying the electric power storage device of the stored electric energy that satisfies the desired electric energy, A device identification unit;
Extracting the attribute information of the specified power storage device from the power storage device registration database, and transmitting this information to the customer terminal as power acquisition destination candidate information, a candidate transmitter,
Transaction processing between the retailer terminal and the consumer terminal that receives the transaction information corresponding to the power supplier candidate information from the consumer terminal and is responsible for selling stored power of the power storage device according to the transaction information A transaction execution unit,
A power transaction control system comprising: In claim 1,
The storage information acquisition unit acquires the current value of the stored power amount in the power storage device from the management device of the power storage device, and stores this in the stored power amount database.
The candidate transmission unit extracts a current value of the stored power amount for the specified power storage device from the stored power amount database, and calculates a predicted value of the stored power amount after a predetermined time of the stored power amount in the past. It is specified based on any one of a change history of stored electric energy, a storage device specification, or a predetermined prediction algorithm, and transmits information on the current value and the predicted value to the customer terminal. , Power trading control system. In claim 1 or 2,
The device identification unit collates the information on the desired electric energy for transaction with the stored electric energy database, and specifies an electric power storage device group when the desired electric energy for transaction is filled with the electric energy stored in a plurality of electric power storage devices. Is what
The candidate transmission unit sets the combination information of the stored power amount of the specified power storage device group on the same coordinate axis of the consumer's past or planned power usage curve stored in an appropriate storage device. Generate graph data and send the graph data to the customer terminal.
A power transaction control system characterized by that. In claim 2 or 3,
The current value of the stored power amount of the power storage device is extracted from the stored power amount database, and the power storage device whose current value is insufficient for the specified stored power capacity is specified as the unusable storage device, and this unusable Delete the registration in the power storage device registration database of the storage device, or associate the unavailable status to the corresponding record, and the device registration deletion unit,
A current value of the stored power amount of the unusable storage device is extracted from the stored power amount database, and it is detected that the current value satisfies a specified stored power capacity, and the unusable storage device is A device re-registration unit that re-registers in the storage device registration database, or associates the available status with the corresponding record,
An electric power transaction control system. A method of controlling power transactions between a power retailer and a consumer by a computer, the computer comprising:
Receives power storage device attribute information from the input interface, stores it in the power storage device registration database,
Obtain the information on the stored energy of the power storage device from the management device of the corresponding power storage device, and store it in the stored energy database,
Receiving information on the desired electric energy from the customer terminal, collating the information on the desired electric energy with the stored electric energy database, and specifying the electric power storage device of the electric energy that satisfies the desired electric energy,
Extract the attribute information of the specified power storage device from the power storage device registration database, and transmit this information to the customer terminal as power acquisition destination candidate information,
Transaction processing between the retailer terminal and the consumer terminal that receives the transaction information corresponding to the power supplier candidate information from the consumer terminal and is responsible for selling stored power of the power storage device according to the transaction information The power transaction control method characterized by performing. A program for causing a computer to execute a method of controlling power transactions between a power retailer and a consumer,
Receiving power storage device attribute information from the input interface and storing it in the power storage device registration database;
Obtaining information on the stored power amount of the power storage device from the management device of the corresponding power storage device and storing it in the stored power amount database;
Step of receiving information on desired electric energy from a customer terminal, collating the information on desired electric energy with reference to said stored electric energy database, and identifying a power storage device having stored electric energy satisfying said desired electric energy When,
Extracting the attribute information of the identified power storage device from the power storage device registration database, and transmitting this information to the customer terminal as power acquisition destination candidate information;
Transaction processing between the retailer terminal and the consumer terminal that receives the transaction information corresponding to the power supplier candidate information from the consumer terminal and is responsible for selling stored power of the power storage device according to the transaction information A step of performing
An electric power transaction control program comprising: