JP2016157438A - Electricity charge management device, electricity charge management method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately distribute profits among a user who purchases power, a user who sells power, and an electric utility in a system for interchanging power among users.SOLUTION: On the basis of an in-area purchased power amount and an in-area sold power amount measured in a power management area, in a power amount purchased in the power management area, the ratio of an amount supplied by the sold power amount of a user in the power management area is calculated as a first coefficient, the ratio of a power amount which a user in the power management area purchases from the sold power amount output from the user in the power management area is calculated as a second coefficient, and distribution target money which is a difference between the prescribed purchased power unit price of power supplied from an electric utility and the prescribed sold power unit price of power purchased by the electric utility is distributed on the basis of the first coefficient, the second coefficient, and a profit distribution ratio among the purchasing user, the selling user and the electric utility.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an electricity charge management device, an electricity charge management method, and a program.

  As a system that allows power interchange among multiple power consumers with storage batteries, the amount of accommodation is determined based on the predicted value of power usage and the charged amount of stored electricity in each house. A configuration is known in which a control device controls power interchange according to the amount (see, for example, Patent Document 1).

Japanese Patent No. 5481080

  Under the present circumstances, a consumer purchases electric power based on a unit price of electric power purchased between a general electric utility and the consumer. In addition, when a consumer with a power generation device such as a solar power generation device or a storage battery asks a general electric utility to purchase all or a surplus of generated power, the general electric utility and the consumer Electric power is sold to a general electric utility by a consumer at a predetermined purchase unit price (electric power sales unit price).

  However, when electricity retailing is liberalized, there is a possibility that the power contract as described above will also change. For example, in the case of a system in which electric power is exchanged between consumers, the electric power required by one consumer includes not only electric power purchased from an electric power supplier but also electric power exchanged from other consumers. . In addition, the electric power that one consumer outputs for selling power is not only reversely flowed to the electric utility side, but is also supplied to other consumers who need the electric power.

From this point of view, it is conceivable to adopt the following fee system in a system in which power is exchanged between consumers. That is, a power purchase unit price that is cheaper than a prescribed unit purchase power unit price determined by a general electric company is set for a consumer who needs power. On the other hand, a consumer who sells electric power sets a unit price of electric power to be sold that is higher than a predetermined unit price of electric power to be sold determined by a general electric company.
When operating with the above fee structure, make sure that profits are distributed appropriately between consumers who purchase electricity, consumers who sell electricity, and electric utilities. Is required.

  The present invention has been made in view of such circumstances, and in a system in which power is interchanged between consumers, between a consumer who purchases electricity, a consumer who sells power, and an electric utility. The purpose is to ensure reasonable profit distribution.

  One aspect of the present invention for solving the above-described problem is obtained by a power amount acquisition unit that acquires a power purchase amount and a power sale amount for each of a plurality of consumers belonging to a power management area, and is acquired by the power amount acquisition unit. An in-area buying and selling power amount calculating unit for calculating an in-area purchased power amount and a total selling power amount acquired by the power amount acquiring unit; Based on the in-area purchased power amount and the in-area sold power amount calculated by the in-area purchased / sold power amount calculating unit, out of the amount of power purchased in the power management area, the consumers in the power management area The ratio covered by the amount of power sold is calculated as a first coefficient, and the ratio of the amount of power purchased by the customer in the power management area is calculated from the amount of power sold output from the customer in the power management area. A coefficient calculation unit that calculates two coefficients, and a distribution obtained as a difference between a specified power purchase unit price determined for power supplied by the electric power company and a specified power sale power unit price determined for power purchased by the electric power company The target amount is based on the first coefficient, the second coefficient, and the profit sharing ratio between the electric power purchase customer who purchases electric power, the electric power sales customer who outputs electric power, and the electric power company, It is an electricity rate management apparatus provided with the profit distribution part distributed among a power purchase consumer, the said power sale consumer, and the said electric power provider.

  One aspect of the present invention is the above-described electricity rate management apparatus, wherein the profit distribution unit is configured to purchase power from the power purchase consumer based on the distribution target amount, the first coefficient, and the profit distribution ratio. The customer distribution amount may be calculated.

  One aspect of the present invention is the above-described electricity rate management device, wherein the electricity purchase consumer distribution amount is subtracted from a specified electricity purchase power unit price determined for the electricity supplied by the electric power provider, thereby obtaining the electricity purchase price. A power purchase unit price when a consumer purchases power may be set.

  One aspect of the present invention is the above electricity rate management apparatus, wherein the profit distribution unit is configured to sell power of the power selling consumer based on the distribution target amount, the second coefficient, and the profit distribution ratio. The customer distribution amount may be calculated.

  One aspect of the present invention is the above-described electricity rate management apparatus, wherein the profit distribution unit adds the power sale consumer distribution amount to a specified power sale unit price determined for power purchased by the electric power company. Thus, the unit price of the electric power sold when the electric power selling consumer outputs electric power may be set.

  One aspect of the present invention is the above-described electricity rate management apparatus, wherein the coefficient calculation unit calculates the in-area electric power sales amount when the in-area electric power sales amount is smaller than the in-area electric power purchase amount. The first coefficient may be calculated by dividing by the amount of power purchased in the area, and when the amount of power sold in the area is larger than the amount of power purchased in the area, the first coefficient may be calculated as “1”.

  One aspect of the present invention is the above electricity rate management apparatus, wherein the coefficient calculation unit calculates the in-area purchased power amount when the in-area purchased power amount is smaller than the in-area purchased power amount. The second coefficient may be calculated by dividing by the amount of power sold in the area, and when the amount of power purchased in the area is larger than the amount of power sold in the area, the second coefficient may be calculated as “1”.

  One aspect of the present invention is a power amount acquisition step of acquiring a power purchase amount and a power sale amount for each of a plurality of consumers belonging to a power management area, and a total of the power purchase amount acquired by the power amount acquisition step. Intra-area electric power sales amount calculation step for calculating electric power purchased in an area and in-area electric power sales amount that is the sum of electric power sales amount acquired in the electric energy acquisition step, and in-area electric power purchase amount calculation step Based on the amount of power purchased in the area and the amount of power sold in the area, the ratio of the amount of power purchased in the power management area covered by the amount of power sold by consumers in the power management area is calculated. Calculated as the first coefficient, the ratio of the amount of power purchased by the customer in the power management area from the amount of power sold output from the customer in the power management area It is obtained as a difference between a coefficient calculation step calculated as the second coefficient, a specified power purchase unit price determined for the power supplied by the electric power company, and a specified power sale power unit price determined for the power purchased by the electric power company. Based on the profit sharing ratio between the first coefficient, the second coefficient, and the power purchase consumer who purchases power, the power sale consumer who outputs power, and the electric utility, An electricity charge management method including a profit sharing step of distributing between the power purchase consumer, the power sale consumer and the electric utility.

  One aspect of the present invention is a power amount acquisition step of acquiring, in a computer, a power purchase amount and a power sale power amount for each of a plurality of consumers belonging to a power management area, and a power purchase power amount acquired by the power amount acquisition step. Power purchase amount in the area that calculates the amount of power purchased in the area that is the sum of the power sold in the area and the amount of power sold in the area that is the sum of the power sold in the area acquired in the power amount acquisition step; Based on the amount of power purchased in the area and the amount of power sold in the area calculated in the amount calculating step, the amount of power purchased in the power management area is covered by the amount of power sold by the consumers in the power management area. The ratio is calculated as the first coefficient, and the customer in the power management area purchases the amount of power sold from the customer in the power management area. A coefficient calculation step for calculating a ratio of the amount of power to be used as a second coefficient, a specified power purchase unit price determined for power supplied by the electric power company, and a specified power sale power unit price determined for the power purchased by the electric power company The distribution target amount calculated as the difference between the first factor, the second factor, and the profit between the electric power purchase customer who purchases the electric power, the electric power selling customer who outputs the electric power, and the electric utility It is a program for executing a profit distribution step of distributing between the power purchase consumer, the power sale consumer and the electric utility based on a distribution ratio.

  As described above, according to the present invention, in a system in which power is exchanged between consumers, there is a reasonable profit between a consumer who purchases power, a consumer who sells power, and an electric utility. An effect is obtained that allocation is performed.

It is a figure which shows the structural example of the power management system in this embodiment. It is a figure which shows an example of the electric equipment with which the consumer facility in this embodiment is provided. It is a figure which shows the structural example of the electricity bill management apparatus in this embodiment. It is a flowchart which shows the example of a process sequence which the electricity bill management apparatus in this embodiment performs. It is a figure which shows the example of the amount of electric power purchased in an area, the amount of electric power sold in an area, and the effective interchangeable electric energy in an area. The in-area energy independence rate (first coefficient) and the in-area energy utilization rate (first factor) calculated in correspondence with the in-area purchased power amount, in-area sold power amount, and in-area effective interchangeable power amount in FIG. 2 coefficients).

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Example of overall configuration of power management system]
FIG. 1 shows an example of the overall configuration of a power management system in the present embodiment. The power management system according to the present embodiment collectively manages power in customer facilities such as houses, commercial facilities, and industrial facilities corresponding to a plurality of customers in a predetermined region. Such a power management system corresponds to a so-called TEMS (Town Energy Management System), CEMS (Community Energy Management System), or the like.

The power management system according to the present embodiment performs power management for an electrical facility provided for each of a plurality of customer facilities 10 in a certain area shown as a power management area 1 in FIG.
The customer facility 10 corresponds to, for example, a house, a commercial facility, or an industrial facility. Further, the power management area 1 may correspond to, for example, one or a plurality of apartment houses, and each of the customer facilities 10 may be each house in the apartment house.

  Here, the owner of the customer facility 10 is called a customer. However, in the following description, the customer may be described in the same meaning as the customer facility 10.

The plurality of customer facilities 10 in the power management area 1 shown in the figure includes customer facilities 10 including solar cells that are power generation devices using renewable energy. In addition, the plurality of customer facilities 10 in the power management area 1 includes a customer facility 10 including a storage battery as one of the electric facilities.
Among such customer facilities 10, there may be a customer facility 10 provided with both a solar battery and a storage battery, or a customer facility 10 provided with either one of a solar battery or a storage battery. Also good.

Each customer facility 10 in the power management area 1 is connected to a common in-area power system 3 so that a commercial power supply 2 provided by an electric power company is branched and supplied. Each customer facility 10 can supply power supplied from the in-area power system 3 to the load. Thereby, various electric facilities (equipment) as a load are operated.
Moreover, the customer facility 10 provided with a solar cell can output the generated power of the solar cell to the in-area power system 3.
Moreover, in the customer | facility facility 10 provided with a storage battery, electric power supply can be received from the electric power system 3 in an area, and a storage battery can be charged (charged). Moreover, in the customer | facility facility 10 provided with a storage battery and a solar cell, the generated electric power of a solar cell can be charged to a storage battery.

  In addition, the location of the customer facility 10 may not be limited to the same area as other customer facilities that are similarly managed as long as the customer facility 10 is a management target of the power management system. In other words, if the power management system is registered as a customer facility under its own management and can transmit and receive information managed using the network 300, different regions (for example, Hokkaido, Honshu, Kyushu, Shikoku, etc.) It may be an aggregate of a plurality of customer facilities registered in each area. In this case, the common in-area power system 3 is an aggregate of power supply lines in an area connected to each of the customer facilities 10.

In the power management system of the present embodiment, an electricity rate management device 200 is provided.
The electricity bill management apparatus 200 performs processing related to the electricity bill for each consumer belonging to the power management area 1. The electricity rate management apparatus 200 is an apparatus operated by an electric power company that provides the commercial power supply 2.
The electricity rate management apparatus 200 in the figure is connected to each of the customer facilities 10 via the network 300 so as to be able to communicate with each other. Thereby, the electricity bill management apparatus 200 can grasp the purchased power and the sold power of each customer facility 10 (customer), and can manage the electricity bill for each consumer.

  The electricity rate management device 200 does not need to be physically installed in the area corresponding to the power management area 1 and may be installed in a predetermined place other than the area corresponding to the power management area 1. . Moreover, the electricity bill management apparatus 200 may be provided in common for a plurality of power management areas.

[Examples of electrical equipment in customer facilities]
Next, with reference to FIG. 2, an example of the electric equipment with which one customer facility 10 is provided is demonstrated.
The customer facility 10 shown in the figure includes a solar cell 101, a power conditioner 102, a storage battery 103, an inverter 104, a power path switching unit 105, a load 106, a facility-specific control unit 107, a display unit 108, and power measurement as electrical equipment. Part 109 is provided.

The solar cell 101 is one of power generation devices that use renewable energy, and converts light energy into electric power by the photovoltaic effect. The solar cell 101 converts sunlight into electric power by being installed in a place where sunlight can be efficiently received, such as the roof of the customer facility 10.
The power conditioner 102 is provided corresponding to the solar cell 101, and converts DC power output from the solar cell 101 into AC.

  The storage battery 103 accumulates electric power input for charging, and discharges and outputs the accumulated electric power. As the storage battery 103, for example, a lithium ion battery can be employed.

  The inverter 104 is provided for each of the one or more storage batteries 103, and performs AC / DC conversion of power for charging the storage battery 103 or DC / AC conversion of power output by discharge from the storage battery 103, and the storage battery 103. Bidirectional conversion of power input / output.

  The power path switching unit 105 switches the power path according to the control of the facility-specific control unit 107. At this time, the facility-specific control unit 107 can control the power path switching unit 105 in accordance with an instruction from a power management apparatus (not shown) that performs integrated power management in the power management area.

The power path switching unit 105 forms a power path so that the power generated by the solar battery 101 is supplied to the storage battery in another customer facility 10 via the power system of the commercial power source 2, for example. Can do.
Further, the power path switching unit 105 can form a power path so as to supply the power output by the discharge of the storage battery 103 to the load 106 in the other customer facility 10.

  The load 106 collectively indicates devices and facilities that consume power in order to operate themselves in the customer facility 10.

The facility-specific control unit 107 includes electrical facilities (solar cell 101, power conditioner 102, storage battery 103, inverter 104, power path switching unit 105, all or part of load 106), display unit 108, and the like in customer facility 10. Control.
The display unit 108 performs various displays under the control of the facility-specific control unit 107. As an example, the display unit 108 displays the usage status of power in the corresponding customer facility 10.

The power measuring unit 109 measures the purchased power and the sold power of the customer facility 10 (customer). When the customer facility 10 requires power from the outside, power is supplied from the in-area power system 3 to the power path switching unit 105 via the power measurement unit 109. The power measuring unit 109 measures the power supplied from the in-area power system 3 in the direction of the power path switching unit 105 as described above as purchased power.
Here, the purchased power is one of the operator power supplied from the commercial power source 2 and the interchanged power supplied (supplied) from another customer facility 10 in the power management area 1 or the operator power. And combined power are combined power.

  Moreover, when the electric power generated in the solar cell 101 in the customer facility 10 or the electric power accumulated in the storage battery 103 is in a state of being surplus with respect to the electric power required in the customer facility 10 Can sell power by outputting the surplus power to the in-area power system 3. In this case, power is supplied from the power path switching unit 105 to the in-area power system 3 via the power measurement unit 109. As described above, the power measuring unit 109 measures the power supplied from the power path switching unit 105 in the direction of the in-area power system 3 as the sold power.

The purchased power and the sold power measured by the power measuring unit 109 as described above are notified to the facility-specific control unit 107.
The facility-specific control unit 107 calculates the amount of electric power purchased by accumulating the electric power purchased notified by the electric power measurement unit 109 at regular time intervals in accordance with the later-described timing of determining the distribution amount. Similarly, the facility-specific control unit 107 calculates the power sale power amount by integrating the power sale power notified by the power measurement unit 109 at regular time intervals.

  The power measurement unit 109 performs processing until the above-described power purchase power amount and power sale power amount are calculated, and the calculated power purchase power amount and power sale power amount are converted from the power measurement unit 109 to the facility-specific control unit. 107 may be notified.

  As described above, some of the customer facilities 10 in the power management area 1 may not include, for example, the solar battery 101, the storage battery 103, and the inverter 104.

[Configuration example of electricity charge management device]
Next, a configuration example of the electricity rate management apparatus 200 will be described with reference to FIG. The electricity rate management apparatus 200 includes a network interface unit 201, an electric energy acquisition unit 202, an intra-area trading electric energy calculation unit 203, a coefficient calculation unit 204, a profit distribution unit 205, a storage unit 206, and a fee calculation unit 207.

  The network interface unit 201 communicates with the facility-specific control unit 107 of each customer facility 10 via the network 300.

  The power amount acquisition unit 202 acquires the amount of power purchased and the amount of power sold for each of a plurality of consumers (customer facilities 10) belonging to the power management area 1. The facility-specific control unit 107 integrates the purchased power measured by the power measurement unit 109 as described above according to a request from the power amount acquisition unit 202 or according to certain conditions instead of a request. The power amount and the power sale power amount obtained by integrating the power sale power measured by the power measurement unit 109 are transmitted to the electricity rate management apparatus 200 via the communication of the network interface unit 201. The power amount acquisition unit 202 acquires the purchased power amount and the sold power amount transmitted from the facility-specific control unit 107 via the network interface unit 201.

  The intra-area trading power amount calculation unit 203 is an area that is the total of the purchased power amount in the area that is the sum of the purchased power amount acquired by the power amount acquisition unit 202 and the sold power amount that is acquired by the power amount acquisition unit 202. Calculate the amount of electricity sold in the house.

The coefficient calculation unit 204 calculates the first coefficient based on the in-area purchased power amount and the in-area sold power amount calculated by the in-area purchased / sold power amount calculating unit 203. The first coefficient is a ratio that is covered by the amount of power sold by consumers in the power management area 1 among the amount of power purchased in the power management area 1.
Further, the coefficient calculation unit 204 calculates the second coefficient based on the in-area purchased power amount and the in-area sold power amount calculated by the in-area purchased / sold power amount calculating unit 203. The second coefficient is a ratio of the amount of power purchased by the customer in the power management area 1 out of the amount of sold power output from the customer in the power management area 1.

The profit distribution unit 205 purchases a distribution target amount obtained as a difference between a specified power purchase unit price determined for power supplied by the electric power company and a specified power sale power unit price determined for power purchased by the electric power company. Distribute among electricity customers, electricity sales customers and electric utilities.
Here, the electric power purchase consumer is a consumer who purchases (needs) electric power. Specifically, a customer when the customer facility 10 owned by the user receives power supply from the in-area power system 3 becomes a power purchase customer.
Further, the power selling customer is a customer who outputs electric power. Specifically, the customer who sells power when the power generated by the solar cell 101 in the customer facility 10 owned by the customer or the power stored in the storage battery 103 is output to the in-area power system 3 is sold. Become a consumer.
The profit distribution unit 205 determines the distribution target amount based on the first coefficient, the second coefficient, and the power distribution consumer based on the profit distribution method among the power purchase consumer, the power sale consumer, and the electric power company. Distribute between electricity sales consumers and electric utilities.

  The storage unit 206 stores various information used by the electricity rate management apparatus 200. The storage unit 206 shown in the figure includes a profit distribution ratio storage unit 261, a specified trading power unit price storage unit 262, a distribution amount storage unit 263, and a power usage record storage unit 264.

  The profit distribution ratio storage unit 261 stores a profit distribution method. As one specific example, when the profit sharing ratio method of a power purchase consumer, a power selling consumer, and an electric power company is a ratio, and the ratio is set as “1: 1: 1”, a profit distribution ratio storage unit In the H.261, information associating each value of “1” to a power purchase consumer, “1” to a power sale consumer, and “1” to an electric power company is stored as a profit distribution ratio.

The specified power purchase unit price storage unit 262 stores the specified power purchase unit price and the specified power sale unit price. As described above, the specified power purchase unit price is a power purchase unit price determined for the power supplied by the electric power company. The specified power selling power unit price is a power selling unit price determined for power purchased by an electric power company.
The specified electric power purchase unit price and the specified electric power sale unit price can be determined by the electric power company. Further, the specified power purchase unit price and the specified power sale unit price may be set so as to change according to the time zone in one day, the week unit, the month unit, or the like.
In addition, when there is no particular distinction between the specified power purchase unit price and the specified power sale unit price, it is referred to as a specified power purchase unit price.

The distribution amount storage unit 263 stores a power purchase customer distribution amount and a power sale customer distribution amount.
The power purchase consumer distribution amount is an amount calculated by the profit distribution unit 205 and distributed to the power purchase consumer as profit. The amount of electricity purchased by consumers is reflected in the unit price of purchased electricity. Specifically, an amount obtained by subtracting the electricity purchase consumer distribution amount from the specified electricity purchase unit price is set as the electricity purchase unit price.
The power sale consumer distribution amount is an amount that is calculated by the profit distribution unit 205 and distributed to the power sale consumer as profit. The distribution amount of electricity sales customers is reflected in the unit price of electricity sales. Specifically, an amount obtained by adding the power selling customer distribution amount to the specified power selling power unit price is set as the power selling power unit price.

  The power use record storage unit 264 stores a power use record for each consumer. The power use record here includes the past power purchase history and power sale history for each consumer. The power purchase history indicates, for example, the amount of power purchased at regular time intervals in the past for the corresponding customer. The power sale history indicates, for example, the amount of electric power sold for a certain time interval in the past for the corresponding customer.

  The charge calculation unit 207 calculates an electricity charge for each consumer. In addition, the charge calculation unit 207 calculates the profit of the electric utility when the distribution target amount is distributed among the three parties of the power purchase consumer, the power sale consumer, and the electric utility.

[Example of processing procedure]
With reference to the flowchart of FIG. 4, an example of a processing procedure for the electricity bill management apparatus 200 in the present embodiment to determine the distribution amount will be described.
Here, the process of determining the distribution in the figure is executed at regular time intervals. By performing the process shown in the figure at regular intervals, changes in the power purchase and sale status for each consumer in the power management area 1 that changes with the passage of time, and regular trading that changes for each time zone It is possible to appropriately determine the distribution amount according to the unit price.

  Step S101: In the electricity bill management apparatus 200, the power amount acquisition unit 202 waits until the distribution amount determination time is reached. The distribution amount determination time is a time set in accordance with a certain time interval that becomes the determination timing of the distribution amount. In order to be able to accurately set the distribution amount according to the current power purchase / sale status in the power management area 1, it is preferable that the fixed time interval is short. The fixed time interval set in the present embodiment is, for example, 1 minute.

Step S102: When it is determined in step S101 that the distribution amount determination time has been reached, the power amount acquisition unit 202 acquires the purchased power amount and the sold power amount from the present to the past one minute at each consumer. .
For this purpose, the power amount acquisition unit 202 transmits a purchase / purchase power amount request to the facility-specific control unit 107 in each customer facility 10 via communication of the network interface unit 201.
In response to reception of the request for electric power purchase / purchase, the facility-specific control unit 107 transmits the amount of electric power purchased and the amount of electric power sold in the period from the present to the past one minute to the electricity rate management apparatus 200.
In addition, if only the power purchase is performed in the customer facility 10 from the present to the past one minute, only the purchased power amount is transmitted as a response to the request for the purchased or sold power amount. Moreover, if only the power sale is performed in the customer facility 10 from the present to the past one minute, only the power sale power amount is transmitted as a response to the request for the power sale amount.
Furthermore, if a period of purchasing power and a period of selling power are included in the customer facility 10 from the present to the past one minute, as a response to the request for buying and selling power, the purchased power amount and the sold power Competence is transmitted.
The power amount acquisition unit 202 acquires the purchased power amount and the sold power amount transmitted from each facility-specific control unit 107 as described above as the purchased power amount and the sold power amount of each consumer.

Step S103: Subsequently, the intra-area trading power amount calculation unit 203 calculates an in-area purchased power amount TB that is the total of the purchased power amount for each consumer acquired in step S102.
The intra-area trading power amount calculation unit 203 can obtain the in-area purchased power amount TB according to the following formula 1, where Pb _i is the purchased power amount of the i-th consumer in the 1st to n-th consumers.

Step S104: The intra-area trading power amount calculation unit 203 calculates an in-area power sales amount TS that is the total of the power sales amount for each consumer acquired in step S102.
The intra-area trading power amount calculation unit 203 can obtain the in-area power selling power amount TS by the following formula 2 with Ps _i being the purchased power amount of the i-th consumer in the 1st to n-th consumers.

  Step S105: Next, the coefficient calculation unit 204 derives an in-area effective interchangeable power amount Pv. The in-area effective accommodation power amount Pv is the amount of power that is effectively accommodated in the area at the present time. The in-area effective interchangeable power amount Pv is obtained by selecting the smaller value of the in-area purchased power amount TB calculated in step S103 and the in-area sold power amount TS calculated in step S104. It is done. That is, the in-area effective interchangeable power amount Pv is obtained by the following Equation 3.

FIG. 5 shows an example of the in-area purchased power amount TB, the in-area sold power amount TS, and the in-area effective interchangeable power amount Pv on a certain day (from 0:00 to 23:00). In addition, the figure has shown the example in the case where it is made to output the electric power generated by the solar cell 101 as electric power sales power in each of the customer facilities 10. FIG. In this case, the electric power stored in the storage battery 103 is used in the customer facility 10 and is controlled so as not to be output to the in-area electric power system 3 as electric power sold.
The solar cell 101 performs power generation according to the intensity of sunlight during the day, and does not generate power at night when sunlight is not obtained. For this reason, surplus power can be generated in the solar cell 101 during the daytime. In the figure, the amount of electric power sold in the area TS corresponding to the surplus power increases from around 7:30, reaches a maximum from around 12:00 to around 13:00, and then gradually decreases until about 18:00. A state of “0 kwh” is shown.
On the other hand, since the power of the solar cell 101 cannot be used at night when the solar cell 101 cannot generate power, the purchased power from the commercial power source increases. For this reason, in the time zone from 0 o'clock to about 8 o'clock and from about 18 o'clock to 24 o'clock, the in-area purchased electric energy TB increases. Here, a further increase in the amount of electricity purchased in the area TB from around 3 o'clock to around 6 o'clock is to supply power to a load such as an electric water heater or charge the storage battery 103 using late-night power with a low electricity bill. It depends on. And in the daytime, since the electric power output from the solar cell 101 can be used, the in-area purchased electric energy TB decreases.

In the same figure, the state where the in-area electric power sales amount TS is larger than the in-area electric power purchase amount TB indicates that a part or all of the electric power required as the in-area electric power purchase amount TB in the electric power management area 1 is It can be said that the solar cell 101 is in a state of being accommodated by the in-area electric power sales amount TS corresponding to the surplus amount of power generated. At this time, the in-area effective interchangeable power amount Pv tends to increase.
On the other hand, in the state where the in-area purchased power amount TB is larger than the in-area sold power amount TS, in the power management area 1, the power purchase consumer mainly uses power from other than the in-area sold power amount TS. It can be said that it is in a state. At this time, the in-area effective interchangeable power amount Pv tends to be small.

Returning to FIG.
Step S106: Then, the coefficient calculation unit 204 calculates a first coefficient K ₁ to be used when calculating the power purchase consumer Distribution Amount alpha _b. The first coefficient K ₁ can be calculated by the following equation 4.
K ₁ = Pv / TB (Expression 4)
Equation 4 in terms of the principle was to determine the first coefficient K ₁ by dividing the DENDEN competence TS sales area in area purchased electric power amount TB, Denden competence TS is area purchased electric power amount sale area When larger than TB, the first coefficient K ₁ is “1”.
The first coefficient K ₁ is supplied from the generated power or the storage battery of the solar cell 101 of the power selling customer in the power management area 1 out of the total amount of purchased power purchased by the power buying customer in the power management area 1. The ratio of the amount of power covered by the generated power is shown.
Therefore, the first coefficient K ₁ is an in-area energy self-sustained rate ε that indicates how much of the power required in the power management area 1 is covered by the power output in the power management area 1. Represents. That is, the first coefficient K ₁ = in-area energy self-sustained rate ε.

Step S107: The coefficient calculation unit 204 calculates a second coefficient _{K 2} to be used when calculating the power sale customer Distribution Amount alpha _s. Second coefficient K ₂ can be calculated by Equation 5 below.
K ₂ = Pv / TS (Formula 5)
Formula 5, in terms of the principle was to obtain the second coefficient K ₂ by dividing the area purchased electric power amount TB in area sold denden competence TS, area purchased electric power amount TB is area sold Denden competence If TS is greater than is the operation that the second coefficient K ₂ is set to "1".
The second coefficient K ₂ is the ratio of the amount of purchased electric power used by the electric power purchase consumer out of the total amount of electric power sold by the electric power selling customer to the in-area power system 3 in the electric power management area 1. Indicates.
Therefore, the second coefficient K ₁ indicates the energy in the area that indicates how much the power purchase customer in the same power management area 1 uses (purchases) the power output by the power sale customer in the power management area 1. Represents utilization η. That is, the second coefficient K ₁ = intra-area energy utilization rate η.

FIG. 6 shows the in-area energy self-sustained rate ε (first coefficient K) obtained in correspondence with the in-area purchased power amount TB, in-area sold power amount TS, and in-area effective interchangeable power amount Pv in FIG. ₁ ) and the in-area energy utilization rate η (second coefficient K ₂ ).
The in-area energy self-sustained rate ε is represented by a value obtained by dividing the in-area effective interchangeable power amount Pv by the in-area purchased power amount TB from the system. The in-area energy utilization rate η is represented by a value obtained by dividing the in-area effective interchangeable power amount Pv by the in-area power sale power amount TS.
The electric power generated by the solar cell 101 increases during the day, decreases in the evening or morning other than during the day, and becomes almost zero at night.
For this reason, the energy self-sustained ratio ε in the area increases during the day because much of the purchased power can be covered by the generated power of the solar cell 101 output by the power selling customer during the day, and the generated power of the solar cell 101 increases. Has a tendency to decrease at decreasing nighttime.
Contrary to the in-area energy self-sustained rate ε, the in-area energy utilization rate η decreases during the day because the surplus power generated by the solar cell 101 flows into the system during the day. In the morning and evening, the solar cell 101 Since the generated power or the surplus power of the storage battery 103 is used only in the power management area 1, it tends to increase.

Returning to FIG.
Step S108: profit sharing unit 205 calculates the power purchase consumer Distribution Amount alpha _b. Profit distribution section 205, in the calculation of the power purchase consumer Distribution Amount alpha _b, and acquires the specified power selling electricity unit price and defining purchased electricity power unit price corresponding to the current time from the specified trading electricity unit price storing unit 262. Also, profit sharing unit 205 obtains the first coefficient _{K 1} calculated by the step S106. Further, the profit distribution unit 205 acquires the profit distribution ratio from the profit distribution ratio storage unit 261.
Then, the profit sharing unit 205, the acquired specified purchased electric power cost per as described above, defines power selling electricity unit price, more buying electricity consumers Distribution Amount in Equation 6 below using the first coefficient K ₁ and profit distribution ratio α _b is calculated.

In Equation 6, C _b are defined purchased electric power cost per, C _s is defined power selling electricity unit price. Further, γ _b , γ _s , and γ _e are values of distribution ratios associated with electric power purchase consumers, electric power sales consumers, and electric power companies, respectively, in the profit distribution ratio. For example, as described above, if the value of “1” is associated with a power purchase consumer, “1” with a power sale consumer, and “1” with an electric power provider, respectively, in the profit sharing ratio, (γ _b = Γ _s = γ _e = 1).
The calculation expressed as (C _b −C _s ) in Equation 6, that is, the value obtained by subtracting the specified power sales unit price from the specified power purchase unit price, This is the amount to be distributed among the three electric utilities.
In addition, the calculation expressed as γ _b / (γ _b , γ _s , γ _e ) in Equation 6 is the distribution to the power purchase customers among the power purchase customer, the power sale customer, and the electric power company. Indicates the distribution rate of the target amount.

Step S109: The profit distribution unit 205 calculates a power sale customer distribution amount α _s . The profit distribution unit 205 obtains the specified power purchase unit price C _b and the specified power sale unit price C _s corresponding to the current time from the specified sale power unit price storage unit 262 in calculating the power sale consumer distribution amount α _s. . Also, profit sharing unit 205 acquires the second coefficient _{K 2} calculated by step S107. Further, the profit distribution unit 205 acquires the profit distribution ratio from the profit distribution ratio storage unit 261.
Then, the profit distribution unit 205 uses the specified power purchase unit price C _b , the specified power sale unit price C _s , the second coefficient K _2, and the profit share ratio acquired as described above to The customer distribution amount α _s is calculated.
The calculation expressed as γ _s / (γ _b , γ _s , γ _e ) in Equation 7 is the distribution ratio to the power selling customers among the power purchase customer, the power sale customer, and the electric power company. Show.

Step S110: profit sharing unit 205, a power purchase consumer Distribution Amount alpha _b calculated in the step S108, and stores the power sale customer Distribution Amount alpha _s calculated in the step S109 to the distribution amount storage unit 263.
Through the above processing, the distribution amount storage unit 263 stores the power purchase consumer distribution amount α _b and the power sale customer distribution amount α _s calculated at regular intervals. The power purchase consumer distribution amount α _b and the power sale customer distribution amount α _s stored in this way are used later to calculate an electricity charge for each consumer.

Specifically, the electricity charge for a charge calculation period for one consumer can be calculated as follows. The charge calculation unit 207 (FIG. 3) calculates the electricity charge.
In calculating the electricity charge in the charge calculation target period for one consumer, the charge calculation unit 207 calculates the purchased power unit price and the sold power unit price for each fixed time in the charge calculation target period.

The charge calculation unit 207 calculates the purchased power unit price by subtracting the purchased power distribution amount α _b corresponding to the same fixed period from the specified purchased power unit price C _b corresponding to one fixed time. In other words, the purchased power unit price CB at regular time intervals is obtained by the following formula 8.
CB = C _b −α _b (Expression 8)
That is, the power purchase unit price CB is an amount obtained by reducing the power purchase consumer distribution amount α _b from the specified power purchase unit price C _b . In this way, the power purchase consumer receives profit distribution by reducing the power purchase consumer distribution amount α _b from the specified power purchase unit price C _b .

In addition, the charge calculation unit 207 calculates the power sale power unit price by subtracting the power sale customer distribution amount α _s corresponding to the same fixed period from the specified power sale unit price C _s corresponding to one fixed time. To do. That is, the electric power selling unit price CS for every fixed time is obtained by the following formula 9.
CS = C _s + α _s (Equation 9)
That is, the power selling power unit price CS is an amount obtained by increasing (adding) the power selling customer distribution amount α _s to the specified power selling power unit price C _s . In this way, the power selling customer receives the profit distribution by performing the increase by the power selling customer distribution amount α _s with respect to the specified power selling power unit price C _s .

  In addition, the charge calculation unit 207 multiplies the purchased power amount and the purchased power unit price at regular time intervals in the charge calculation target period, and accumulates the amounts obtained by the multiplication. The amount obtained by integrating in this way becomes the power purchase fee in the electricity bill.

  In addition, the fee calculation unit 207 multiplies the amount of electric power sold for each fixed time in the fee calculation target period by the unit price of electric power sold, and integrates the amount obtained by the multiplication. The amount obtained by integrating in this way becomes a power selling fee in the electricity bill.

Further, the distribution profit Bn of the electric power company when viewed as the unit price of electric power is expressed by the following formula 10.
_{Bn = (C b -C s)} - (α b + α s) ··· ( Formula 10)
That is, the distribution profit Bn of the electric power company is obtained by subtracting the power purchase consumer distribution amount α _b and the power sale customer distribution amount α _s from the distribution target amount.
The charge calculation unit 207 can calculate the distribution profit amount of the electric power company in the charge calculation target period using the distribution profit Bn obtained by the above equation 10 as follows. That is, the fee calculation unit 207 calculates the distribution profit Bn for each fixed time in the charge calculation target period, and integrates the calculated distribution profit Bn for each fixed time. The amount obtained by the integration becomes the amount of profit distributed by the electric power company during the period subject to charge calculation.

The power purchase consumer distribution amount α _b is a reduction from the specified power purchase unit price C _{b in the} power purchase unit price, and therefore increases as the in-area energy self-sustained rate ε, which is the first coefficient K ₁ , increases.
When the power sale power increases relative to the power purchase power, surplus power sale power is generated without being available in the power management area 1. Therefore, the state in which the power sale power included in the power purchase power is large is a state in which the customer wants to promote power purchase. Such benefits purchased power consumer Distribution Amount alpha _b is dispensed as the consumer be performed is power purchase power purchase consumer in a high state is increased. Thereby, it is possible to effectively urge the customer to purchase power in a state where the sold power included in the purchased power is large.

Since the power sale customer distribution amount α _s is an increase from the specified power sale power unit price C _{s in the} power sale power unit price, the higher the in-area energy utilization rate η, which is the second coefficient K ₂ , becomes higher.
When the purchased power increases relative to the sold power, the sold power that can be used in the power management area 1 is insufficient. Therefore, the state in which the purchased power included in the sold power is large is a state in which the customer wants to promote the power sale. If the consumer sells power in such a state where the power sale consumer distribution amount α _s is high, the profit distributed as a power sale consumer also increases. Thereby, in the present embodiment, it is possible to effectively urge the customer to sell power in a state where the purchased power included in the sold power is large.
In this way, in the present embodiment, profit distribution can be appropriately performed among the three parties of the power purchase consumer, the power sale consumer, and the electric utility.

Intra-area purchased power amount TB, in-area sold power amount TS and in-area effective interchangeable power amount Pv shown in FIG. 5, in-area energy self-sustained rate ε (first coefficient K ₁ ) and in-area energy shown in FIG. The utilization factor η (second coefficient K ₂ ) corresponds to the case where the power generated by the solar cell 101 is output as the sold power. That is, in the description so far, a case where control is performed so that the power generated by the solar cell 101 in the power management area 1 is output as sold power is taken as an example.
However, in this embodiment, the power management area 1 may be controlled so as to output the power stored in the storage battery 103 as the selling power instead of the solar battery 101. When power selling power is output from the storage battery 103, as an example, the storage battery 103 can be operated by the facility-specific control unit 107 in each customer facility 10 as follows.
That is, for example, the storage battery 103 is charged using late-night power in a predetermined time zone at night. In addition, for example, the power stored in the storage battery 103 is output as sold power in a predetermined time zone corresponding to the evening when the power demand increases but the power generated by the solar battery 101 cannot be obtained. In addition, when outputting the electric power accumulate | stored in the storage battery 103 as electric power sales power, for example, when the surplus part arises using the electric power of the storage battery 103 with the load 106 of the consumer facility 10, the surplus part is made into electric power sale electric power. You may make it output, and without supplying the electric power of the storage battery 103 to the load 106, you may make it output to the in-area electric power system 3 as electric power selling power as it is.
In this way, even when the power output from the storage battery 103 is used as the selling power, the relationship among the purchased power amount TB in the area, the sold power amount TS in the area, and the effective interchangeable power amount Pv in the area conforms to FIG. It will be a thing. That is, although illustration is omitted, in the night time zone, the in-area purchased power amount TB is high, whereas the in-area sold power amount TS is low. On the other hand, during the daytime, the solar battery 101 generates power to reduce the amount of purchased power TB in the area, and in the time zone corresponding to the evening, the power stored in the storage battery 103 is used as the electric power for sale. As a result, the in-area purchased electric energy TB is generated. At this time, if the in-area purchased power amount TB is larger than “0” and the in-area purchased power amount TS is higher than the in-area purchased power amount TB, the in-area effective power corresponding to the in-area purchased power amount TB is obtained. An accommodation power amount Pv is obtained. In addition, the energy self-sustained ratio ε (first coefficient K ₁ ) in the area for each time zone is obtained by the calculation of Expression 4 and Expression 5 using the in-area purchased power amount TB and the in-area power sale energy TS for each time period. An in-area energy utilization rate η (second coefficient K ₂ ) is obtained.

In the present embodiment, the electric power generated by the solar battery 101 and the electric power stored in the storage battery 103 may be used in combination to be output as sold power. In this case, for example, the power sale power can be output as follows. That is, under a state where the solar cell 101 can generate power during the day, the surplus power generated by the solar cell 101 without being used by the load 106 is output as sold power. Then, in a state where power generation cannot be performed by the solar battery 101 in the evening or at night, the power stored in the storage battery 103 is output as the sold power.
In the above example, the time zone in which the power generated by the solar battery 101 is output as the selling power is different from the time zone in which the power stored in the storage battery 103 is output as the selling power. However, for example, during the daytime, the power generated by the solar battery 101 and the power stored in the storage battery 103 can be simultaneously output as sold power.

  Note that a program for realizing the functions of the above-described electricity bill management apparatus 200 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed, thereby executing the above-described program. You may perform the process as the electricity bill management apparatus 200. FIG. Here, “loading and executing a program recorded on a recording medium into a computer system” includes installing the program in the computer system. The “computer system” here includes an OS and hardware such as peripheral devices. The “computer system” may include a plurality of computer devices connected via a network including a communication line such as the Internet, WAN, LAN, and dedicated line. 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. As described above, the recording medium storing the program may be a non-transitory recording medium such as a CD-ROM. The recording medium also includes a recording medium provided inside or outside that is accessible from the distribution server in order to distribute the program. The code of the program stored in the recording medium of the distribution server may be different from the code of the program that can be executed by the terminal device. That is, the format stored in the distribution server is not limited as long as it can be downloaded from the distribution server and installed in a form that can be executed by the terminal device. Note that the program may be divided into a plurality of parts, downloaded at different timings, and combined in the terminal device, or the distribution server that distributes each of the divided programs may be different. Furthermore, the “computer-readable recording medium” holds a program for a certain period of time, such as a volatile memory (RAM) inside a computer system that becomes a server or a client when the program is transmitted via a network. Including things. 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, what is called a difference file (difference program) may be sufficient.

DESCRIPTION OF SYMBOLS 1 Electric power management area 2 Commercial power supply 3 Area power system 10 Customer facility 101 Solar cell 102 Power conditioner 103 Storage battery 104 Inverter 105 Power path switching unit 106 Load 107 Control unit according to facility 108 Display Unit 109 Power Measurement Unit 200 Electricity Price Management Device 201 Network Interface Unit 202 Electricity Acquisition Unit 203 Intra-area Trading Electricity Calculation Unit 204 Coefficient Calculation Unit 205 Profit Distribution Unit 206 Storage Unit 207 Fee calculation unit, 261 Profit distribution ratio storage unit, 262 Standard trading power unit price storage unit, 263 Distribution amount storage unit, 264 Power usage record storage unit, 300 Network

Claims (9)

A power amount acquisition unit for acquiring a power purchase amount and a power sale amount for each of a plurality of consumers belonging to the power management area;
In the area to calculate the purchased power amount in the area that is the sum of the purchased power amount acquired by the power amount acquiring unit and the sold power amount in the area that is the total of the sold power amount acquired by the power amount acquiring unit A trading power calculation unit,
Based on the in-area purchased power amount and the in-area sold power amount calculated by the in-area purchased / sold power amount calculating unit, out of the amount of power purchased in the power management area, the consumers in the power management area The ratio covered by the amount of power sold is calculated as a first coefficient, and the ratio of the amount of power purchased by the customer in the power management area is calculated from the amount of power sold output from the customer in the power management area. A coefficient calculation unit that calculates two coefficients;
The distribution target amount determined as the difference between the specified power purchase unit price determined for the power supplied by the electric power company and the specified power sale power unit price determined for the electric power purchased by the electric power company is the first coefficient, Based on the second coefficient and the profit sharing ratio between the electric power purchase customer who purchases electric power, the electric power sale customer who outputs electric power, and the electric power supplier, the electric power purchase consumer and the electric power sale customer And a profit sharing unit that distributes between the power provider and the electric utility. The profit sharing unit
The electricity bill management apparatus according to claim 1, wherein a power purchase consumer distribution amount of the power purchase consumer is calculated based on the distribution target amount, the first coefficient, and the profit distribution ratio. By subtracting the power purchase consumer distribution amount from a specified power purchase power unit price determined for the power supplied by the electric power company, a power purchase power unit price when the power purchase consumer purchases power is set. The electricity charge management apparatus according to claim 2. The profit sharing unit
The electricity charge according to any one of claims 1 to 3, wherein a power sale consumer distribution amount of the power sale consumer is calculated based on the distribution target amount, the second coefficient, and the profit distribution ratio. Management device. The profit sharing unit
The power selling power unit price when the power selling consumer outputs power is set by adding the power selling consumer distribution amount to the specified power selling power unit price determined for the power purchased by the electric power company. The electricity bill management apparatus according to claim 4. The coefficient calculation unit
When the in-area sold power amount is smaller than the in-area purchased power amount, the first coefficient is calculated by dividing the in-area sold power amount by the in-area purchased power amount, and the in-area sold power amount The electric charge management device according to any one of claims 1 to 5, wherein the first coefficient is calculated as "1" when is larger than the in-area purchased power amount. The coefficient calculation unit
When the in-area purchased power amount is smaller than the in-area sold power amount, the second coefficient is calculated by dividing the in-area purchased power amount by the in-area sold power amount, and the in-area purchased power amount The electricity rate management apparatus according to any one of claims 1 to 6, wherein the second coefficient is calculated as "1" when is greater than the amount of electricity sold in the area. A power amount acquisition step of acquiring a power purchase amount and a power sale power amount for each of a plurality of consumers belonging to the power management area;
In the area for calculating the purchased power amount in the area that is the sum of the purchased power amount acquired in the power amount acquiring step and the sold power amount in the area that is the total of the sold power amount acquired in the power amount acquiring step Electricity sales amount calculation step,
Based on the in-area purchased power amount and the in-area sold power amount calculated in the in-area sold power amount calculating step, out of the amount of power purchased in the power management area, the consumers in the power management area The ratio covered by the amount of power sold is calculated as a first coefficient, and the ratio of the amount of power purchased by the customer in the power management area is calculated from the amount of power sold output from the customer in the power management area. A coefficient calculating step for calculating two coefficients;
The distribution target amount determined as the difference between the specified power purchase unit price determined for the power supplied by the electric power company and the specified power sale power unit price determined for the electric power purchased by the electric power company is the first coefficient, Based on the second coefficient and the profit sharing ratio between the electric power purchase customer who purchases electric power, the electric power sale customer who outputs electric power, and the electric power supplier, the electric power purchase consumer and the electric power sale customer And a profit sharing step of distributing between the electric utility and the electric utility. On the computer,
A power amount acquisition step of acquiring a power purchase amount and a power sale power amount for each of a plurality of consumers belonging to the power management area;
In the area for calculating the purchased power amount in the area that is the sum of the purchased power amount acquired in the power amount acquiring step and the sold power amount in the area that is the total of the sold power amount acquired in the power amount acquiring step Electricity sales amount calculation step,
Based on the in-area purchased power amount and the in-area sold power amount calculated in the in-area sold power amount calculating step, out of the amount of power purchased in the power management area, the consumers in the power management area The ratio covered by the amount of power sold is calculated as a first coefficient, and the ratio of the amount of power purchased by the customer in the power management area is calculated from the amount of power sold output from the customer in the power management area. A coefficient calculating step for calculating two coefficients;
The distribution target amount determined as the difference between the specified power purchase unit price determined for the power supplied by the electric power company and the specified power sale power unit price determined for the electric power purchased by the electric power company is the first coefficient, Based on the second coefficient and the profit sharing ratio between the electric power purchase customer who purchases electric power, the electric power sale customer who outputs electric power, and the electric power supplier, the electric power purchase consumer and the electric power sale customer And a profit sharing step of distributing between the electric utility and the electric utility.

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