JP2011229268A - Power control system and power control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power control system for efficiently leveling the demand-and-supply balance of power over a safe network.SOLUTION: In a power control system, a plurality of micro grids each formed by including a user communication terminal and a power control device are connected with each other over a network. In the power control system, the communication terminal performs authentication processing upon receiving input of user identification information for identifying a user and authentication information for authenticating the user. In the case where a result of the authentication indicates an authentication success, power is supplied from a provider to the user. The power control device stores a power history in which the user identification information is made corresponding to the amount of power supplied to the user, communicates with a power control device in the other micro grid connected over the network, compares its own power state with a power state in the other micro grid and controls a power transaction with the other micro grid in accordance with a comparison result.

Description

  The present invention relates to a technique for optimizing a power supply / demand balance.

In recent years, global warming has been rapidly progressing under the influence of greenhouse gases. As global warming progresses, the impact on human ecosystems is immeasurable. The main cause of the greenhouse gas is CO ² . Most of this CO ² is generated by the consumption of fossil fuels, but the proportion of CO ² generated from thermal power plants is particularly large. For this reason, renewable energy is being introduced in order not to rely on thermal power plants. As renewable energy, research on solar power generation, wind power generation, etc. and development of laws such as the Electricity Business Law are progressing, and it is expected that such renewable energy will be introduced in large quantities in addition to grid power in the future . Since the amount of electricity generated by renewable energy varies depending on the climate, etc., it is necessary to level the power. Therefore, a smart grid that attempts to optimize the power supply / demand balance by installing a communication terminal in a facility or the like that creates or uses electric power to form a network and performing information communication has been studied. As a method of realizing a smart grid, attention is paid to distributed energy management as shown in FIG. Here, the power supply and demand area is divided into clusters in a certain area, and such a cluster is used as a microgrid, and the power is controlled so as to balance the supply and demand within the microgrid. By stacking such microgrids, for example, a smart grid on a national scale can be realized. Patent Document 1 proposes a technology that makes it possible to trade power in such a microgrid.
On the other hand, as a communication terminal as described above, research on an electronic measuring instrument (smart meter) is underway. A smart meter measures, for example, power demand for a customer and transmits it in real time to a business operator that supplies the power. As a result, it becomes possible for the operator side to grasp the amount of electric power for demand that changes from moment to moment.

JP 2003-32899 A

  However, in the microgrid as described above, it is ideal that the power supply is self-sufficient with the equipment in the microgrid, but it is also assumed that the supply and demand balance in the microgrid may be disrupted due to climate change etc. Is done. On the other hand, since the smart meter as described above is widely connected to an IP (Internet Protocol) network or the like, there is a concern about impersonation or leakage of personal information. Therefore, in such a network, it is desirable that even when the supply-demand balance in the microgrid is lost, the supply-demand balance of the smart grid as a whole is leveled and communication is performed in consideration of security threats.

  The present invention has been made in view of such circumstances, and provides a power control system and a power control method for efficiently leveling the power supply-demand balance with a safe network.

  In order to solve the above-described problems, the present invention is connected to a plurality of communication terminals of a user who is a power consumer or a user who is a supplier supplying power to the consumer, and the communication terminal via a network. A power control system in which a plurality of microgrids formed including a power control device are connected to each other via a network, and a communication terminal is used for authenticating a user and user identification information for identifying the user An authentication information input unit for inputting authentication information, an authentication unit for performing user authentication processing based on the user identification information and authentication information input to the authentication information input unit, and an authentication result of the authentication processing by the authentication unit However, if the authentication is successful, the power control unit is configured to supply power from the supplier to the consumer, and the power control device includes the user identification information and the amount of power supplied to the user. Is stored in the power history storage unit in which the power history associated with the power history is stored, the amount of power used in its own microgrid, and the amount of power that can be supplied in its own microgrid. Communicates with the power control unit in the other microgrid connected via the network, and compares the power state in the other microgrid and the power state in the other microgrid, and according to the comparison result And a power control unit that controls power transactions with other microgrids.

  Further, the present invention is characterized in that the authentication unit of the communication terminal performs an authentication process based on user identification information and authentication information stored in an IC chip or IC card issued in advance to the user.

  In addition, the present invention provides a plurality of communication terminals of a user who is a power consumer or a user who is a supplier supplying power to the consumer, and user identification information which is connected to the communication terminal via a network and identifies the user. A power history storage unit that stores a power history associated with a power amount supplied to the user, a power amount used in its own microgrid, and supplied in its own microgrid Power of a power control system in which a plurality of microgrids formed by including a power control device including a power state storage unit that stores a power state with a possible power amount are connected via a network A control method, wherein the communication terminal accepts input of user identification information for identifying a user and authentication information for authenticating the user; A step of performing a user authentication process based on the user identification information and the authentication information, a step of causing a consumer to supply power from a supplier when the authentication result of the authentication process indicates a successful authentication, and a power control device Storing the power history in which the user identification information for identifying the user and the amount of power supplied to the user are associated with each other in the power history storage unit, and other micros connected via the network Communicating with the power control device in the grid, comparing its own power state with the power state in another microgrid, and controlling power transactions with other microgrids according to the comparison results; It is characterized by providing.

  As described above, according to the present invention, in a power control system in which a plurality of microgrids formed by including a user's communication terminal and a power control device are connected via a network, the communication terminal includes: When authentication processing is performed by accepting input of user identification information for identifying a user and authentication information for authenticating the user, and the authentication result indicates successful authentication, power is supplied from the supplier to the consumer, and power control is performed. The device stores a power history in which user identification information and the amount of power supplied to the user are associated, communicates with a power control device in another microgrid connected via the network, and Compare the power state of the current and the power state in the other microgrid, and control the power trading with the other microgrid according to the comparison result Because, it is possible to provide a power control system for leveling a balance between supply and demand of power efficiently by a secure network.

It is a block diagram which shows the structural example of the power control system by one Embodiment of this invention. It is a figure which shows the plant | facility etc. with which the electric power control system by one Embodiment of this invention is provided. It is a figure which shows the authentication concept of the parent IC card and child IC card by one Embodiment of this invention. It is a figure which shows the table data example of the power history memorize | stored in the power history memory | storage part by one Embodiment of this invention. It is a sequence diagram which shows the operation example of the electric power transaction by one Embodiment of this invention. It is a flowchart which shows the operation example of the supply-and-demand balance optimization process by one Embodiment of this invention. It is a flowchart which shows the operation example of the electric power history storage process by one Embodiment of this invention. It is a model figure which shows the concept of the supply and demand balance leveling by one Embodiment of this invention. It is a figure which shows the example of the electric power transaction by one Embodiment of this invention. It is a figure which shows the example of the electric power transaction by one Embodiment of this invention. It is a figure which shows the example of the electric power transaction by one Embodiment of this invention. It is a figure which shows the relationship between the smart grid formed by one Embodiment of this invention, an electric power payment system, and a cash payment system. It is a figure which shows the example of the supply-and-demand balance optimization of the thermal energy in the case of applying one Embodiment of this invention to energy transactions other than electric power. It is a figure which shows the concept of the microgrid in a distributed energy management.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating a configuration of a power control system 1 according to the present embodiment. The power control system 1 includes a microgrid A, a microgrid B, a microgrid C,..., And a plurality of grid power companies 700 (system power company 700-1, grid power). Company 700-2, system power company 700-3,...), Which are connected via a power network and a communication network. Here, three micro grids and three grid power companies 700 are illustrated and described, but any number of one or more may be used.

  FIG. 2 is a diagram illustrating facilities and the like provided in the power control system 1. For example, a house that is a customer's facility, a power storage company, a solar power plant, a charging station that charges an electric vehicle, system power, and the like are connected to the microgrid A. Houses of customers are a plurality of electronic devices that operate using electric power, storage batteries that store the power generated by solar power, and electronic meters (smart meters) that measure the power used or generated in these batteries. Etc.

Returning to FIG. 1, the symbol a is a smart community center (SCC) in which the power control apparatus 140 according to the present embodiment is installed. This SCC can be considered as a kind of power bank. The power bank enables deposits and withdrawals in units of “electric power” instead of “money” handled by ordinary banks. The SCC includes the power generation facility 110, the power storage facility 120, the measuring instrument 130, and the power control device 140. However, the SCC may include only the power storage facility 120 and the power control device 140, or only the power control device 140. It doesn't matter. The management of this SCC is operated according to the security management standard similar to the Internet data center (IDC).
The power generation facility 110 is a facility that generates power by, for example, solar power generation or wind power generation.
The power storage facility 120 is a facility for accumulating generated power.
The measuring device 130 measures the power supplied to and supplied from other facilities via a network (power network).

  The power control device 140 is a computer device that controls power transactions within its own microgrid and between other microgrids. The power control device 140 includes a communication unit 141, an authentication unit 142, a power state storage unit 143, a power history storage unit 144, a power settlement history unit 145, a cash settlement history storage unit 146, and a power control unit 147. It has.

The communication unit 141 communicates with other communication terminals connected via a network (communication network).
The authentication unit 142 receives an authentication request from another communication terminal connected via a network (communication network), performs an authentication process, and transmits an authentication result. Here, for example, an IC card in which user information such as a predetermined user ID and a password corresponding to the user ID is stored in advance is issued to a user who makes a power transaction using the power control system 1. For example, the user information stored in the IC card is read to the authentication information input unit 251 of the authentication communication terminal 250 and transmitted to the power control apparatus 140 as an authentication request by the authentication unit 252 of the authentication communication terminal 250. The authentication unit 142 stores predetermined user information in its own storage area, and compares the transmitted authentication request with user information stored in advance in its own storage area. Then, the authentication unit 142 determines that the authentication is successful if user information that matches the user information included in the transmitted authentication request is stored in its own storage area, and determines that the authentication fails if it is not stored. .

  FIG. 3 illustrates authentication between the parent IC card 260 and a plurality of child IC cards 261 (child IC card 261-1, child IC card 261-2, child IC card 261-3,...) Performed according to the present embodiment. It is a figure which shows a concept. Here, the IC card issued to the user includes a parent card and a plurality of child IC cards corresponding to one parent card. For example, the parent IC card is an IC chip or an IC card that is inserted into the authentication communication terminal 250 or the like, and is a terminal authentication card. The child IC card is an IC card possessed by each of a plurality of users corresponding to the parent IC card, and is a card used by an individual for personal authentication. That is, authentication is performed between the authentication communication terminal 250 and the SCC by the parent IC card 260, and authentication is performed between the individual user and the SCC by the child IC card 261.

  The power state storage unit 143 stores the power state of the amount of power used in its own microgrid and the amount of power that can be supplied in its own microgrid. The power state stored in the power state storage unit 143 is collected and stored by the power control unit 147.

  The power history storage unit 144 stores a power history in which user identification information (user ID) for identifying a user is associated with the amount of power supplied to the user. FIG. 4 is a diagram illustrating an example of power history table data stored in the power history storage unit 144. In the power history, the date and time, the connection destination terminal ID, the connection source terminal ID, the user parent ID, the user child ID, the event type (“buy / sell”, “power consumption / power storage / power generation”), Information on the amount of electric power, power factor, gas data, heat dissipation / heat storage data, power storage balance, power consumption balance, charge balance, and cash settlement balance (here, credit balance) is included.

  The date and time indicate the date and time when the power transaction was performed. The connection destination terminal ID indicates where the connection is made, and is identification information for identifying the communication terminal installed at the connection destination. The connection source terminal ID indicates where the connection is made, and is identification information for identifying a communication terminal installed at the connection source. For example, in the case of an electric vehicle, the connection destination ID is information for identifying an ID (identification information) stored and stored in the electric vehicle. The connection source terminal ID is information for identifying a charging station of a charging company (for example, charging company e in FIG. 1). The user parent ID is the ID of the parent IC chip or IC card. The user child ID is an ID of the child IC card. For example, it is the ID of this child card that indicates who charged the electric vehicle.

  The event type indicates the type of event in which the power transaction is performed, and indicates, for example, “buy (power consumption or power storage)” or “sell (power generation)”. The amount of power is the amount of power traded. The power factor is a power factor when power is distributed. For example, when power is transmitted / distributed by direct current in a microgrid, the power factor is 1, but when power is transmitted / distributed by alternating current between different microgrids, a certain loss occurs. Gas data and heat dissipation / heat storage data are items in which information corresponding to the amount of power, power factor, and the like is stored when a transaction such as energy other than electric power is performed. Here, the charge varies depending on the amount of electricity used and the type of power (power storage company, grid power company 1, 2, etc.). The electric power consumption balance is an item of the electric power consumption charge balance assuming the settlement at the weekend or the end of the month. For example, a case where it is withdrawn from a bank can be considered. The settlement determination is an item for selecting a payment (for example, charge or credit) different from these. The charge balance is an item indicating the balance of the advance payment deduction from the charged amount. The credit settlement balance is an item indicating a balance when credit payment is made. Here, the value of the electric energy and the electric energy balance is in units of kw · H (kilowatt hour).

The power settlement history unit 145 stores power histories such as a power storage balance and a power consumption balance among the power histories stored in the power history storage unit 144.
The cash settlement history storage unit 146 stores the charge balance and the cash settlement balance among the power histories stored in the power history storage unit 144, and stores the charge history information and the cash settlement balance information. . In cash settlement, for example, credit settlement can be selected.

  The power control unit 147 communicates with a power control device in another microgrid connected via a network, and own power state stored in the power state storage unit 143 and the power control device of another microgrid Are compared with each other, and power transactions with other microgrids are controlled according to the comparison result. Here, the power control unit 147 performs the power transaction in its own microgrid when the supply and demand balance can be suppressed within a certain range by the power transaction in its own microgrid.

The customer's facility indicated by reference sign b includes a general device 210, a power generation device 220, a power storage device 230, a measuring instrument 240, and an authentication communication terminal 250. However, the customer's facility may be configured to include only the general device 210 or one of the general device 210 and the power generation device 220 or the power storage device 230.
The general device 210 is various devices (for example, a television, a personal computer, an air conditioner, etc.) that operate using electric power as shown in the house of FIG.
The power generation device 220 is a device that generates power by, for example, solar power generation or wind power generation.
The power storage device 230 is a facility for storing generated power.
The measuring device 240 measures the power supplied to and supplied from other facilities and the like via a network (power network).

The authentication communication terminal 250 is a computer device that communicates with other communication terminals or the like connected via a network (communication network), and includes an authentication information input unit 251, an authentication unit 252, and a power transaction unit 253. ing.
The authentication information input unit 251 receives user identification information (user ID) for identifying a user and authentication information for authenticating the user. Here, the authentication information input unit 251 has, for example, an IC reader function, and may read user information stored in an IC card issued in advance to the user. Further, the authentication information input unit 251 may include an input unit such as a keyboard and accept input of a user ID, a password, and the like. Further, for example, input of information for biometric authentication such as a fingerprint or an iris may be accepted.

The authentication unit 252 performs user authentication processing based on the user ID and authentication information input to the authentication information input unit 251. For example, the authentication unit 252 transmits an authentication request including the input user ID and authentication information to the power control apparatus 140, and acquires an authentication result returned from the power control apparatus 140 in response to the transmitted authentication request. . Here, when the authentication information input unit 251 includes an IC card reader and reads information stored in the IC card, the authentication unit 252 generates an authentication request based on the read information, and the power control device 140 may be transmitted. Alternatively, the authentication unit 252 may perform authentication by an authentication processing function provided in an IC chip included in the IC card, and acquire an output authentication result.
When the authentication result of the authentication process by the authentication unit 252 indicates that the authentication is successful, the power trading unit 253 causes the consumer to supply power from the supplier, or causes the consumer to supply power to the supplier.

The facility of the power storage company indicated by reference symbol c includes a power storage facility 310, a measuring device 320, and an authentication communication terminal 330.
The power storage facility 310 is the same as the power storage facility 120 included in the SCC, and is a facility for storing generated power.
The measuring device 320 measures the power supplied to and supplied from other facilities via a network (power network).
The authentication communication terminal 330 is a computer device having the same function as the customer authentication communication terminal 250, and performs processing such as authentication of a power storage company.

The facility of the power generation company indicated by reference sign d includes a power generation facility 410, a measuring instrument 420, and an authentication communication terminal 430.
The power generation facility 410 is the same as the power generation facility 110 included in the SCC, and is a facility that generates power by, for example, solar power generation or wind power generation.
The measuring instrument 420 measures the power supplied to and supplied from other facilities via a network (power network).
The authentication communication terminal 43 is a computer device having the same function as the customer authentication communication terminal 250, and performs processing such as authentication of the power generation company.

The charging company's facility indicated by symbol e includes a power storage facility 510, a measuring instrument 520, and an authentication communication terminal 530. However, the charging company's facility may or may not have power storage equipment. For example, the electric vehicle may be directly supplied with electric power from the power grid, or may be supplied with electric power from the electric storage facility if the electric vehicle is provided with the electric storage facility.
The power storage facility 510 is the same as the power storage facility 120 included in the SCC, and is a facility that accumulates generated power.
The measuring device 520 measures the power supplied and supplied to other facilities and the like via a network (power network).
The authentication communication terminal 530 is a computer device having the same function as the customer authentication communication terminal 250, and performs processing such as authentication of the charging company.

The ISP 600 is a computer device of an Internet service provider connected to a network (communication network). The Internet service provider can provide additional services such as a point service, for example, according to the power storage balance and the power consumption balance value stored in the power history storage unit 144.
The grid power company 700 is a so-called general electric utility that performs power transmission, and includes an authentication communication terminal 710.
The authentication communication terminal 710 is a computer device having the same function as the customer authentication communication terminal 250, and performs processing such as authentication of the grid power company.

Next, an operation example of the power control system 1 will be described with reference to the drawings. FIG. 5 is a sequence diagram illustrating an operation example of power trading by the power control system 1. Here, power control device 140 of microgrid A will be described as power control device 140-1, and power control device 140 of microgrid B will be described as power control device 140-2.
The authentication information input unit 251 of the authentication communication terminal 250 reads user information stored in the user's IC card (step S1). The authentication unit 252 transmits an authentication request including the user information read by the authentication information input unit 251 to the power control apparatus 140-1 (step S2). The authentication unit 142 of the power control apparatus 140-1 receives the authentication request transmitted from the authentication communication terminal 250 via the communication unit 141, and performs an authentication process (step S3). The authentication unit 142 transmits the authentication result to the authentication communication terminal 250 (step S4).

  The authentication unit 252 of the authentication communication terminal 250 receives the authentication result transmitted from the power control apparatus 140, and determines whether or not the authentication result indicates successful authentication (step S5). If the authentication unit 252 determines that the authentication result indicates an authentication failure (step S5: NO), the process ends. On the other hand, if authentication unit 252 determines that the authentication result indicates successful authentication (step S5: YES), authentication communication terminal 250 transmits the determined transaction request to power control device 140-1 (step S6). . Here, the transaction request is, for example, a request for supplying a certain amount of power or a request for selling a certain amount of power.

  When the communication unit 141 of the power control device 140-1 receives the transaction request transmitted from the authentication communication terminal 250, the power control unit 147 refers to the power state stored in the power state storage unit 143, and the micro It is determined whether or not the grid A is within the range of supply and demand balance (step S7). When the power control unit 147 determines that the microgrid A is within the range of supply and demand balance (step S7: YES), the power control device 140-1 performs a transaction in the microgrid A with respect to the authentication communication terminal 250. A transaction permission that permits this is transmitted (step S9). The range of the supply and demand balance is set according to the situation, but is, for example, a range satisfying (demand amount <supply amount <demand amount + several%). Upon receiving the transaction permission transmitted from the power control device 140-1, the power trading unit 253 of the authentication communication terminal 250 receives another communication terminal (for example, the authentication communication terminal 330, the authentication communication terminal 430, the authentication communication terminal 530, etc.). To communicate with each other (step S10). Moreover, the power transaction part 253 produces | generates the power log | history based on the performed power transaction, and transmits to the power control apparatus 140-1 (step S11). When the communication unit 141 of the power control device 140-1 receives the transmitted power history, the power control unit 147 stores the power history in its own storage area.

  On the other hand, if the power control unit 147 determines in step S7 that the microgrid A is not within the range of supply and demand balance (step S7: NO), the power control unit 147 of the power control device 140-1 uses another microgrid ( For example, a transaction request is transmitted to the microgrid B). When receiving the transaction request transmitted from the power control device 140-1, the power control unit 147 of the power control device 140-2 receives its own microgrid as in the process performed by the power control device 140-1 in step S7. It is determined whether or not B is within the range of supply and demand balance. If the power control unit 147 of the power control device 140-2 determines that it is within the range of supply and demand balance and can supply power to the microgrid A, it transmits a transaction permission to the power control device 140-1 (step S12). . The power control device 140-1 transmits a transaction permission to the authentication communication terminal 250 (step S13). When the authentication communication terminal 250 receives the transaction permission transmitted from the power control apparatus 140-2, the communication terminal in the micro grid B (for example, the authentication communication terminal 330, the authentication communication terminal 430, and the authentication communication terminal 530 in the micro grid B). Etc.) to conduct power transactions (step S14). In addition, the power transaction unit 253 generates a power history based on the performed power transaction and transmits it to the power control device 140-1 (step S15). Here, the power transaction unit 253 may transmit the power history based on the power transaction performed with the microgrid B to the power control device 140-2.

  FIG. 6 is a flowchart illustrating an operation example of the supply and demand balance optimization process by the power control apparatus 140. The supply / demand balance optimization process corresponds to the process shown in step S7 of FIG. Here, the power control unit 147 communicates with each communication terminal in the microgrid A, and acquires the power supply state (step S20). Here, for example, the operator storage data is acquired from the authentication communication terminal 330 of the power storage company and the authentication communication terminal 530 of the charging company. Further, the customer storage data is acquired from the authentication communication terminal 250 of the customer. Further, the storage battery 120 stores power storage data stored in the power storage facility 120 from the measuring instrument 130 in its own SCC. The power control unit 147 causes the power state storage unit 143 to store the acquired power storage data.

  In addition, the power control unit 147 acquires the power generation data from the power generation company's authentication communication terminal 430. Also, power company power generation data is acquired from the authentication communication terminal 710 of the grid power company 700. Further, the customer power generation data is acquired from the authentication communication terminal 250 of the customer. Further, the power generation data generated by the power generation facility 110 is acquired from the measuring instrument 130 in its own SCC. The power control unit 147 stores the acquired power generation data in the power state storage unit 143.

  Further, the power control unit 147 communicates with each communication terminal in the microgrid A, and acquires the power usage state (step S21). For example, the power consumption data is acquired from the authentication communication terminal 250 of the consumer. Further, for example, weather forecast data distributed from the Japan Meteorological Agency or the like via a network is acquired. The power control unit 147 causes the power state storage unit 143 to store the acquired power consumption data. Initially, optimization is performed using real data. Optimize supply and demand balance on a best-effort basis by modeling the entire system. Next, the power control unit 147 performs supply / demand balance prediction and supply / demand balance range setting processing. For example, the power control unit 147 acquires various basic data including information on existing areas such as consumers, business operators, electric power companies, and SCCs, and facilities provided. The power control unit 147 predicts the supply and demand balance based on the basic data acquired in this way, the power supply state acquired in step S20, the power usage state acquired in step S21, the startup prediction data, and the like. The balance range is determined (step S22).

  Here, when the power control unit 147 determines that the amount of power used is greater than the amount of power supplied (power supply is insufficient) in the supply and demand balance in the microgrid A (step S23: YES), With reference to the power state stored in the power state storage unit 143 and the power history stored in the power history storage unit 144, prediction calculation of the electric energy is performed (step S24). Further, the power control unit 147 calculates the supply capacity in the microgrid A with reference to the item of the counterpart power state in the power history stored in the power history storage unit 144 (step S25). In addition, the power control unit 147 calculates a power charge based on the power generation charge data of the customer, the operator, the power company, and the CSS, the storage charge data of the operator, the consumer, and the SCC (Step S26). Then, the power control unit 147 selects a power supply unit based on the amount of power calculated in step S24, the supply capacity calculated in step S25, and the power charge calculated in step S26 (step S27). Examples of power supply means include requesting power supply to consumers, power companies, and businesses, supplying power from the power generation equipment 110 or the power storage equipment 120 in its own SCC, and requesting power supply to other microgrids. Conceivable.

  On the other hand, when the power control unit 147 determines in step S23 that the amount of power used is less than the amount of power supplied (the amount of power supplied is excessive) in the supply and demand balance in the microgrid A (step S23: NO), based on the power generation history data and the power storage history data, a prediction calculation of the electric energy in the microgrid A is performed (step S28). Further, the supply capacity in the microgrid A is calculated (step S29). Moreover, a power charge is calculated (step S30). Then, the power control unit 147 selects a power reduction unit based on the amount of power calculated in step S28, the supply capacity calculated in step S29, and the power charge calculated in step S30 (step S31). As the power reduction means, for example, a request for reduction to a consumer, a power company, a business operator, or an SCC, or a request for sale of power to another microgrid can be considered. Thereafter, it is determined whether or not to continue (step 32). If you continue, go back to the start again.

FIG. 7 is a flowchart illustrating an operation example of the power history storage processing by the power control apparatus 140.
For example, when the power control unit 147 of the power control device 140 receives the power history transmitted from the authentication communication terminal 250 in step S14 of FIG. 5, the received power history is temporarily stored and stored in its own recording area. To do. The power control unit 147 determines whether or not the accumulation time for accumulating the power history has passed a certain time (for example, 30 minutes) (step S40). The power control unit 147 continues to accumulate the power history transmitted from the authentication communication terminal 250 or the like (step S41) while the accumulation time for accumulating the power history does not elapse for a certain time (step S40: NO). Here, the data stored in the power control unit 147 is, for example, basic data, power consumption data, power generation history data, power storage history data, power storage charge data, power generation charge data of each of the customer, power company, business operator, and SCC. And weather forecast data.

  In step S40, when the power control unit 147 determines that the storage time for storing the power history has passed a certain time (step S40: YES), the power control unit 147 stores the stored data in the power history storage unit 144. It converts into the data format to memorize | store and produces | generates a history table (step S42). In addition, the power control unit 147 stores the generated history table in the power history storage unit 144. Then, the power control unit 147 determines whether or not it is a predetermined settlement system report time (step S44). The settlement system report time is a time that is determined to be settled once a month, for example. The power control unit 147 determines whether or not the current time acquired by the time counting function provided by the power control unit 147 matches a predetermined settlement system report time, and determines that the current time does not match (step S44: NO). Return to S40.

  On the other hand, when the power control unit 147 determines that the current time matches the predetermined payment system report time (step S44: YES), it generates payment information (step S45). The settlement here is based on the amount of power. The data is stored in the power settlement history storage unit 145. When the supply amount exceeds the usage amount, the amount of power may be left as it is even after cashing. For example, for a consumer whose power consumption exceeds the power supply, the difference is converted into cash (step S46). The data is stored in the cash settlement history storage unit 145. The power control unit 147 causes the power history storage unit 144 to store the power history based on the settlement process and the cashing process (step S47). As in FIG. 6, it is determined whether or not to continue (step 48).

  FIG. 8 is a model diagram showing the concept of supply and demand balance leveling according to the present embodiment. Through the processing as described above, the electricity supply-demand balance is calculated according to the consumption of electricity by consumers, and electricity supply such as grid power companies, wind power, solar power generation is performed, and storage batteries are used in some cases Furthermore, the electricity supply-demand balance is calculated, and the supply-demand balance is leveled.

Here, with reference to FIG. 9, four cases in which power control is performed by the power control system 1 of the present embodiment will be described by exemplifying specific amounts.
Case 1 shown in (a) is a case where the consumer A-1 purchases electric power in the microgrid A. For example, suppose you have a plan to travel far away with your family on May holidays. When you want to charge an electric vehicle, you purchase power through SCC. When customer A-1 purchases electric power from each company in the grid, he / she purchases necessary electric power with the electric charge from SCC-A + sales fee. The SCC-A sells the power purchased from each business operator with a sales commission added to the consumer A-1.

  Case 2 shown in (b) is a case where the consumer A-1 sells electric power in the microgrid A. For example, in this example, electricity generated by the power generation equipment owned by the consumer A-1 is sold through the SCC. When the customer A-1 sells electric power to each company in the grid, the electric power corresponding to the electric charge is sold to the SCC-A. The SCC-A sells the power purchased from the consumer A-1 by adding a sales fee to each business operator in the grid.

  Case 3 shown in (c) is a case where the consumer A-1 of the microgrid A purchases electric power from the microgrid B. For example, when an earthquake occurs in one's own grid, neither power generation nor power storage is possible due to a failure of power generation equipment and power storage equipment in the grid, so neither the grid nor SCC-A has surplus power. In that case, a consumer purchases electric power from the neighboring grid B. When the customer A-1 purchases electric power from each provider of another grid, he / she purchases necessary electric power by using the electric power charge from the SCC-A which is the own grid + the sales fee of the grid A + the sales fee of the grid B. SCC-A purchases electric power from SCC-B at a power charge + a sales fee of grid B. SCC-B sells the power purchased from each operator by adding the sales fee of grid B to SCC-A.

  Case 4 shown in (d) is a case where the consumer A-1 of the microgrid A sells electric power to the microgrid B. For example, suppose that an earthquake occurred in the adjacent grid B. I heard the news that the power is extremely short, so I want to sell the power generated by the generator to the microgrid B. When the consumer A-1 sells electric power to each business operator of another grid, the electric power corresponding to the electric charge is sold to the SCC-A that is the own grid. The SCC-A sells the electric power to the SCC-B at a power charge purchased from the consumer A-1 and a sales fee of the grid A. SCC-B sells the power purchased from SCC-A to each business operator with the grid B sales commission added. As described above, all information at the time of trading is performed through the SCC.

  Further, according to the present embodiment, as shown in FIG. 10, by performing identity authentication using an IC card in a communication terminal, it is possible to transmit and receive data after confirming the identity of the user. . As a result, even when a certain user uses his / her IC card (child IC card) and uses charging from a charging company, the power history can be stored in association with the same user. This makes it possible to record when, where, and who used or supplied power. In addition, by publishing the power history acquired according to the present embodiment so as to be viewable and openable to a predetermined user, for example, the living state of a family member living separately can be seen. For example, by providing a predetermined user (for example, a child of the elderly person) the power history acquired by the authentication communication terminal 250 installed in the elderly living alone, the user is away. It becomes possible to grasp the life of the elderly. In addition, it is possible to grasp the living state of a child (student) whose parents live far away, or to grasp the living state of a sick person. Thereby, for example, it is considered that there is a case where the dangerous state can be detected when the life pattern changes suddenly.

  When the smart meter having the function of the authentication communication terminal 250 according to the present embodiment is distributed to each home by a country or a power company, the smart meter is provided with a display, a keyboard, etc., and browsing such as the Internet via a network is possible. A so-called PC (personal computer) function may be provided. In this way, for example, the Internet network can be spread in countries and regions where the Internet network is not widespread, and information gaps can be corrected.

  Also, different charge settings may be made for each microgrid, and different charge settings may be used when a user purchases power in his / her microgrid and when he / she purchases power in another microgrid. You may make it do. For example, as shown in FIG. 11A, when the user of the microgrid A performs charging in the own microgrid, it is assumed that the transfer fee is charged. Thereafter, as shown in FIG. 11B, when the user moves from the microgrid A to the microgrid B and performs charging outside the own microgrid, a fee may be added. In addition, renewable energy such as solar power generation and wind power generation may be traded in the same manner as, for example, a variable exchange rate because the amount of power generation varies depending on the climate or the like.

  Also, as shown in FIG. 12, for example, a plurality of smart grids (smart grid Pa, smart grid b) for each country are controlled on the same power payment system platform. The platform for the cash settlement system may be commonly used for a wider range of smart grids. For example, even in the same country, there are places where wind power generation is suitable depending on the region, and there are places where solar power generation is suitable, so a microgrid is constructed according to the weather conditions of each region. In Europe, there are places where the electric power network extends beyond the country, and the field interleaving (FIT) may be common in the country or a plurality of countries, or may be independent. An electricity payment system may be established between these common nations. Further, the platform of the cash settlement system may use a wider range, for example, a credit card platform. The reason why SCC is not only for credit settlement is because it is public. People on the blacklist cannot have a credit card. Settlement must be made available to all people in consideration of weather conditions and public nature.

Moreover, although the electric power control system 1 by this embodiment was demonstrated as an electric power transaction system, as shown in FIG. 13, you may apply to the system which digitizes gas, heat, etc. and performs an energy transaction.
In addition, when power is traded between different microgrids, a DC transmission / distribution network may be provided. Since solar power generation, storage batteries, and the like are direct current, direct current transmission is preferable in some cases. Electric power may be transmitted after performing orthogonal transformation.
In addition, each microgrid and grid power company 700 in this embodiment are connected by a power network and a communication network. For example, in an area where a communication network or the like is not established, power line communication in the power network is performed. Information communication may be performed by (PLC: Power Line Communication). Of course, even if there is a communication network, PLC may be used.

  Further, in the present embodiment, the power storage business operator, the power generation business operator, the charging business operator, and the consumer have been illustrated and described separately, but these are business enterprises that also serve as a plurality of roles. May be. For example, it may be a business operator that performs both the power storage business and the power generation business. Further, in the present embodiment, an example in which a consumer includes the power generation device 220 and the power storage device 230 is illustrated, but the consumer may not include the power generation device 220, the power storage device 230, and the like.

  Note that the program for realizing the function of the processing unit in the present invention is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into the computer system and executed to control the power. You may go. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer system” includes a WWW system having a homepage providing environment (or display environment). The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.

  The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

DESCRIPTION OF SYMBOLS 1 Power control system 110 Power generation equipment 120 Power storage equipment 130 Metering device 140 Power control apparatus 141 Communication part 142 Authentication part 143 Power state memory | storage part 144 Power history memory | storage part 145 Electricity settlement history part 146 Cash settlement history memory part 147 Power control part 210 General Device 220 Power generation device 230 Power storage device 240 Metering device 250 Authentication communication terminal 251 Authentication information input unit 252 Authentication unit 253 Power transaction unit 260 Parent IC card 261 Child IC card 310 Power storage facility 320 Metering device 330 Authentication communication terminal 410 Power generation facility 420 Meter 430 Authentication communication terminal 510 Power storage facility 520 Meter 530 Authentication communication terminal 600 ISP
700 Grid power company 710 Authentication communication terminal

Claims (3)

A plurality of communication terminals of a user who is a power consumer or a user who is a supplier supplying power to the consumer, and a power control device connected to the communication terminal via a network are included. A power control system in which a plurality of microgrids are connected via a network,
The communication terminal is
An authentication information input unit for inputting user identification information for identifying the user and authentication information for authenticating the user;
An authentication unit that performs an authentication process of the user based on the user identification information and the authentication information input to the authentication information input unit;
When the authentication result of the authentication process by the authentication unit indicates authentication success, the power transaction unit for supplying power from the supplier to the consumer,
The power control device
A power history storage unit that stores a power history in which the user identification information is associated with the amount of power supplied to the user;
A power state storage unit in which the power state of the amount of power used in its own microgrid and the amount of power that can be supplied in its own microgrid is stored;
It communicates with the power control device in the other microgrid connected through the network, compares its power state with the power state in the other microgrid, and according to the comparison result A power control unit that controls power transactions with the microgrid;
A power control system comprising: The authentication unit of the communication terminal performs the authentication process based on the user identification information and the authentication information stored in an IC chip or IC card issued in advance to the user. The power control system according to 1. A plurality of communication terminals of a user who is a consumer of power or a user who is a supplier supplying power to the consumer, user identification information which is connected to the communication terminal via a network and identifies the user, A power history storage unit that stores a power history associated with a power amount supplied to a user, a power amount used in its own microgrid, and can be supplied in its own microgrid A power control method for a power control system in which a plurality of microgrids formed by including a power control device including a power state storage unit in which a power state and a power state are stored are connected via a network Because
The communication terminal is
Receiving input of the user identification information and authentication information for authenticating the user;
Performing the user authentication process based on the input user identification information and the authentication information;
If the authentication result of the authentication process indicates authentication success, the step of causing the consumer to supply power from the supplier;
The power control device is
Storing the power history in which the user identification information and the amount of power supplied to the user are associated with each other in the power history storage unit;
It communicates with the power control device in the other microgrid connected through the network, compares its power state with the power state in the other microgrid, and according to the comparison result Controlling power trading with the microgrid;
A power control method comprising:

Images