JP2011165088A - Power transaction system and method for controlling the power transaction system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power transaction system and a method for controlling the power transaction system capable of resolving a feeling of unfairness caused by difference of power generation quantity of solar power generation devices which are distributed power generation devices when transactions of surplus electricity in a multiple dwelling house or an area where the solar power generation devices are installed. <P>SOLUTION: The power transaction system includes: the solar power generation device 6 provided to each of a plurality of houses 1; a power generation quantity measurement part 7 provided to each of the plurality of houses 1 to measure the power generation quantity of the solar power generation device 6 for every house; a first average electric energy calculation part 21 which calculates an average value of the power generation quantity per unit area using the power generation quantity measured by each of the plurality of power generation quantity measurement parts 7; a first power coefficient calculation part 22 which calculates a power coefficient which is ratio between the power generation quantity measured by the power generation quantity measurement part 7 and the average value calculated by the first average power generation quantity calculation part 21 for every house; and a power price adjustment part 23 which adjusts transaction prices using the power coefficient calculated by the first power coefficient calculation part 22 when power is transacted among the plurality of houses 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electric power transaction system that enables transactions in an apartment house or an area for surplus electric power generated by a distributed power generation device such as a solar power generation device, and a control method for the electric power transaction system.

  In collective housing and condominiums, a distributed power generator such as a solar power generator is one of the assets of the house. If a personally owned distributed power generation device becomes widespread, it is expected that a society where the power generated by the power generation device is exchanged in an apartment house or an area and the entire apartment house or area is self-sufficient in energy. For example, while subsidizing the power used in the home from the power generation of the home solar power generation system in an apartment house or area, surplus power is provided to other homes, while When it is not possible to cover the electricity used in the home, purchase the missing electricity from another home. By increasing the amount of power generated by the power generation device and reducing the amount of power used in the house, it is possible to generate surplus power in the entire apartment house or region and sell it to other apartment houses, regions or power companies.

  When using the power generated by the solar power generation device, unfairness in the profits of power generation occurs between those who stay at home in the day and those who have a lot of opportunities to be absent during the day (for example, a single office worker). In response to this problem, for example, in the “power distribution system in an apartment house” disclosed in Patent Document 1, the power generated by the solar power generation device is reflected in the electricity rate of each house according to the proportion of use. ing.

JP 2005-295670 A

  By the way, in condominiums and condominiums, there are cases where solar power generation devices of the same size are installed in each house, and the asset value is estimated at approximately the same price and sold to home buyers. The amount of power generation may vary depending on the location of the solar power generation device and the sunshine environment. Subtracting the power used in your home from the generated power and conducting surplus power in the collective housing and condominium areas, the amount of power generated and sold by the solar power generator for each home It will be possible to grasp and compare in condominiums.

  Compared to houses with the same amount of power used, the more solar power generated, the more surplus power will increase and it will be advantageous for power sales, so even though it is solar power purchased with almost the same asset value, the actual power generated If the owner of the photovoltaic power generation device knows that there is a big difference, unfairness arises, and there is a problem that hinders the sense of solidarity related to power transactions in apartment houses and areas. Such a problem is not limited to a solar power generation device, and when a power transaction is carried out including a distributed power generation device such as a wind power generation or a fuel cell, a power generation device purchased with substantially the same asset value and whose power generation amount cannot be controlled Can happen about.

  The present invention has been made in view of such circumstances, and it is based on the difference in the amount of power generated by the power generator when performing power transactions in an apartment house or a region where a distributed power generator such as a solar power generator is installed. An object of the present invention is to provide a power trading system and a power trading system control method capable of eliminating unfairness.

  An electric power transaction system according to the present invention is an electric power transaction system in which electric power generated by a distributed power generator provided in each of a plurality of houses is traded between the plurality of houses, and is provided in each of the plurality of houses. A power generation amount measuring means for measuring the power generation amount of each of the distributed power generators, a first average power amount calculating means for calculating an average value of the power generation amounts measured by each of the plurality of power generation amount measuring means, and a house A first power coefficient calculating means for calculating a power coefficient that is a ratio between the power generation amount measured by the power generation amount measuring means and the average value calculated by the first average power amount calculating means; Power price adjusting means for adjusting the transaction price using the power coefficient calculated by the first power coefficient calculating means when trading power between different houses.

  According to the above configuration, the power coefficient, which is the ratio between the power generation amount measured by the power generation amount measurement means and the average value calculated by the first average power amount calculation means, is calculated for each house, When trading electricity, the transaction price is adjusted using the calculated power coefficient for each house, so there is a sense of unfairness among houses due to the difference in the amount of power generated by the distributed generators installed in each house. Can be resolved.

  An electric power transaction system according to the present invention is an electric power transaction system in which electric power generated by a distributed power generator provided in each of a plurality of houses is traded between the plurality of houses, and is provided in each of the plurality of houses. A power consumption measuring means for measuring the power consumption for each, a second average power energy calculating means for calculating an average value of the power consumption measured by each of the plurality of power consumption measuring means, and for each house A second power coefficient calculating unit that calculates a power coefficient that is a ratio between the used power amount measured by the used power amount measuring unit and the average value calculated by the second average power amount calculating unit; Power price adjusting means for adjusting the transaction price using the power coefficient calculated by the second power coefficient calculating means when trading power between houses.

  According to the above configuration, the power coefficient, which is the ratio between the power consumption measured by the power consumption measuring unit and the average value calculated by the second average power calculation unit, is calculated for each house, Since the transaction price is adjusted using the calculated power coefficient for each house when trading electricity between the houses, there is a sense of unfairness among the houses due to the difference in the amount of power generated by the distributed generators installed in each house. Can be eliminated.

  An electric power transaction system according to the present invention is an electric power transaction system in which electric power generated by a distributed power generator provided in each of a plurality of houses is traded between the plurality of houses, and is provided in each of the plurality of houses. A power generation amount measuring means for measuring the power generation amount of each of the distributed power generators; a power consumption measuring means for measuring a power consumption amount provided for each of the plurality of houses; and the plurality of power generation amounts. A third average power amount calculating means for calculating an average value of power generation amounts measured by each of the measuring means, and calculating an average value of power consumption amounts measured by each of the plurality of power consumption measuring means; The ratio of the power generation amount measured by the power generation amount measurement means and the average value of the power generation amount calculated by the third average power amount calculation means, the power consumption amount measured by the power consumption amount measurement means, and the Third average power calculation A third power coefficient calculating means for calculating a product of the ratio of the used electric energy calculated in the stage and a ratio to the average value, and the third power coefficient calculating means when trading power between the plurality of houses. Power price adjusting means for adjusting the transaction price using the power coefficient calculated in (1).

  According to the above configuration, the ratio of the power generation amount measured by the power generation amount measurement unit for each house and the average value of the power generation amount calculated by the third average power amount calculation unit is calculated, and the power consumption measurement unit is used. The ratio of the power consumption measured in step 3 to the average value of the power consumption calculated by the third average power consumption calculation means is calculated, and the product of these calculation results is calculated between the plurality of houses. Since the transaction price is adjusted using the power coefficient, which is the calculation result of the third power coefficient calculation means, when the power is traded at each house, between the houses due to the difference in the power generation amount of the distributed power generator provided for each house Unfairness can be eliminated.

  In the above configuration, when the power price adjusting means sells the power generated by the distributed power generation device to another house, the power price price is obtained by adding the reciprocal of the power coefficient of the house to be sold to the standard price. Ask for.

  In the above configuration, when purchasing the power generated by the distributed power generation device of another house, the power price adjusting unit calculates the purchase price by adding the power coefficient of the house to be purchased to a standard price.

  A control method for a power trading system according to the present invention is a control method for a power trading system in which power generated by a distributed power generator provided in each of a plurality of houses is traded between the plurality of houses. A power generation amount measuring step for measuring the power generation amount of the distributed power generation device; a first average power amount calculating step for calculating an average value of the power generation amount for each house measured in the power generation amount measurement step; A first power coefficient calculation step for calculating a power coefficient that is a ratio between the power generation amount for each house measured in the amount measurement step and the average value of the power generation amount calculated in the first average power amount calculation step; And a power price adjustment step of adjusting the transaction price using the power coefficient calculated in the first power coefficient calculation step when trading power between the plurality of houses.

  According to the above method, the power coefficient, which is the ratio between the power generation amount measured for each house and the average value calculated in the first average power amount calculating step, is calculated, and power is traded between a plurality of houses. Since the transaction price is adjusted using the calculated power coefficient for each house, it is possible to eliminate unfairness among the houses due to the difference in the amount of power generated by the distributed generator installed in each house. .

  The program of the present invention causes a computer to execute the control method of the charging system.

  According to the above program, it is possible to eliminate unfairness among houses due to the difference in the amount of power generated by the distributed power generation apparatus provided for each house.

  The present invention provides a feeling of unfairness among houses due to the difference in the amount of power generated by power generators installed in each house when conducting power transactions in an apartment house or a region where a power generator such as a solar power generator is installed. Can be eliminated.

The block diagram which shows schematic structure of the electric power transaction system which concerns on Embodiment 1 of this invention. The figure which shows an example of the power sale unit price and power sale price when selling surplus electric power with the electric power trading system of FIG. Fig. 2 is a graph showing an example of Fig. 2. The figure which shows an example of the purchase unit price and purchase price when purchasing insufficient power in the power trading system of FIG. FIG. 4 is a graph showing an example of FIG. Flow chart for explaining the operation of the power trading system of FIG. Flow chart for explaining the operation of the power trading system of FIG. The block diagram which shows schematic structure of the electric power transaction system which concerns on Embodiment 2 of this invention. The figure which shows an example of the power selling unit price and power selling price when surplus power is sold in the power trading system of FIG. FIG. 9 is a graph showing an example of FIG. The figure which shows an example of the purchase unit price and purchase price when purchasing insufficient power in the power trading system of FIG. FIG. 11 is a graph showing an example of FIG. Flow chart for explaining the operation of the power trading system of FIG. Flow chart for explaining the operation of the power trading system of FIG. The block diagram which shows schematic structure of the electric power transaction system which concerns on Embodiment 3 of this invention. The figure which shows an example of the power selling unit price and power selling price when surplus power is sold in the power trading system of FIG. FIG. 16 is a graph showing an example of FIG. The figure which shows an example of the purchase unit price and purchase price when purchasing insufficient power in the power trading system of FIG. FIG. 18 is a graph showing an example of FIG. Flowchart for explaining the operation of the power trading system of FIG. Flowchart for explaining the operation of the power trading system of FIG.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram showing a schematic configuration of the power trading system according to Embodiment 1 of the present invention. A solar power generation device will be described as an example of a distributed power generation device. In the figure, the power transaction system 100 according to the present embodiment includes various devices provided in each of the houses 1A, 1B, 1C,... Among the electric power generated by the solar power generators 1C,..., The power trading device 2 is configured to trade surplus power that has not been used between houses in the area. The solar power generation device and the various devices provided in each of the houses 1A, 1B, 1C,... In which the solar power generation device is introduced are common, and in FIG. 1, alphabets (A, B, C,...) Are added. To distinguish which house is installed.

  For example, in the house 1A, a solar power generation device 6A, a power generation amount measuring unit 7A, a power meter 8A, a used power amount measuring unit 9A, a notification unit 10A, an electric device 11A, a surplus power selling unit 12A, and a shortage power purchasing unit 13A. Is provided. Further, in the house 1B, a solar power generation device 6B, a power generation amount measuring unit 7B, a power meter 8B, a used power amount measuring unit 9B, a notification unit 10B, an electric device 11B, a surplus power selling unit 12B, and a shortage power purchasing unit 13B. Is provided. In addition, the house 1C includes a solar power generation device 6C, a power generation amount measurement unit 7C, a power meter 8C, a power consumption measurement unit 9C, a notification unit 10C, an electric device 11C, a surplus power power sale unit 12C, and a shortage power purchase unit 13C. Is provided. As described above, since the various devices provided in each of the houses 1A, 1B, 1C,... Are the same, the various devices provided in the house 1A will be described here.

  The power generation amount measurement unit 7A measures the power generated by the solar power generation device 6A and outputs the measurement result. The power meter 8A measures the power supplied from the power company 15 and outputs the measurement result. The power consumption measuring unit 9A measures the power consumption in the house from the sum of the power from the power company 15 measured by the power meter 8A and the power from the solar power generation device 6A measured by the power generation measuring unit 7A. And output the measurement result. 10 A of alerting | reporting parts output the information for alerting | reporting to the inhabitant of 1 A of used electric energy, the electric power selling price, or the purchase price measured by 9A of used electric energy. The electric device 11A is a device that includes an indicator that displays the amount of electric power used, the electric power selling price, or the purchase price when operating using electric power, and the electric power selling price is obtained from the information output from the notification unit 10A. Display purchase price. The surplus power selling unit 12A sells the surplus power in the house 1A. The electric power to be sold is sent to the power transaction apparatus 2. The insufficient power purchase unit 13A purchases insufficient power when the house 1A falls short of power. The purchase of insufficient power is made to the power transaction apparatus 2.

  The power transaction apparatus 2 includes a first average power amount calculation unit 21, a first power coefficient calculation unit 22, a power price adjustment unit 23, a surplus power recovery unit 24, and a shortage power providing unit 25. The first average power amount calculation unit 21 uses the power generation amount measured by each of the power generation amount measurement units 7A, 7B, 7C,... Of each house 1A, 1B, 1C,. The average value of the power generation amount per unit area of 6C,... Is calculated, and the calculation result is output. The first power coefficient calculation unit 22 calculates the power generation amount measured by each of the power generation amount measurement units 7A, 7B, 7C,... Of each house 1A, 1B, 1C,. A power coefficient that is a ratio to the average value is calculated, and a calculation result is output.

  The power price adjusting unit 23 adjusts the transaction price using the power coefficient calculated by the first power coefficient calculating unit 22 when power is traded between the houses 1A, 1B, 1C,. The power price adjustment unit 23 notifies the adjusted transaction price to a settlement system (not shown) in a region outside this system. When selling the electric power generated by the photovoltaic power generator 6 to another house, the electric power price adjusting unit 23 obtains the electric power selling price by adding the reciprocal of the electric power coefficient to the standard price. Moreover, the power price adjustment part 23 calculates | requires a purchase price by integrating | accumulating the said electric power coefficient to a standard price, when purchasing the electric power generated with the solar power generation device 6 of another house. The regional settlement system (not shown) settles the power sales / purchase amount of the apartment house / region based on the transaction price (power sale price and purchase price) notified from the power price adjustment unit 23. Settlement with administrative expenses and local community association fees.

  The surplus power recovery unit 24 recovers surplus power in each of the houses 1A, 1B, 1C,... And notifies the power price adjustment unit 23 of the recovered surplus power. The power shortage providing unit 25 supplies the power collected by the surplus power recovery unit 24 to the homes 1 that have fallen in power in each of the homes 1A, 1B, 1C,..., And supplies the supplied power shortage to the power price adjustment unit 23. Notice. When the power collected by the surplus power recovery unit 24 alone cannot cover the power shortage of the houses 1A, 1B, 1C,..., The surplus power recovery unit 24 notifies the power shortage purchase unit 13 of the house 1 to that effect. The power consumption measuring unit 9 of the house 1 that has received the power supplies insufficient power from the power company 15 via the power meter 8.

  Although not shown, if the surplus power recovery unit 24 is provided with a storage battery or an energy storage device to store surplus power, the surplus power generated by the solar power generation device 6 is stored during the day and supplied at night. be able to.

FIG. 2 is a diagram illustrating an example of a power selling unit price and a power selling price when surplus power is sold in the houses 1A, 1B, and 1C. In order to simplify the description, the power generation panel area of the solar power generation devices of the houses 1A, 1B, and 1C is assumed to be 1 m ² . Actually, the area of the power generation panel of a residential solar power generation device is not 1 m ² , but it is a solar power generation device that is purchased with substantially the same asset value and is expected to generate almost the same amount of power. A description will be given comparing the amount of power generation. If the solar power generators of the houses 1A, 1B, and 1C are the same and the power generation panel area is approximately the same size, the power generation amounts of the houses may be compared (the unit areas may not be compared).

As shown in this figure, in the house 1A, the amount of power generated by the solar power generation device 6A is 100 (kWh / m ² ) and the amount of power used is 50 (kWh), so the amount of power sold is 50 (kWh). It is. In the house 1B, the amount of power generated by the solar power generation device 6B is 100 (kWh / m ² ) and the amount of power used is 70 (kWh), so the amount of power sold is 30 (kWh). In the house 1C, the amount of power generated by the solar power generation device 6C is 60 (kWh / m ² ) and the amount of power used is 30 (kWh), so the amount of power sold is 30 (kWh).

  The average value of the power generation amount in the solar power generation devices 6A to 6C of the houses 1A to 1C is 260 / 3≈86.7, and the reciprocal of the power coefficient of the power generation amount in each of the houses 1A to 1C is the average value of the power generation amount / Since the power generation amount of each house is 0.87 (86.7 / 100) for house 1A, 0.87 (86.7 / 100) for house 1B, and 1.44 (86.7 / 60) for house 1C. It becomes. Assuming that the standard price of electric power to be sold (indicated by the standard unit price) is 40 (yen / kWh), the unit price of electricity sold is 34.7 (yen / kWh) for the house 1A and 34.7 (yen / kWh) for the house 1B. ), 57.8 (yen / kWh) at 1C, and the selling price is 1,733 (yen) at 1A, 1,040 (yen) at 1B, and 1,733 (yen) at 1C. Become.

  The amount of power sold by the house 1C is 30 (kWh), which is the same as that of the house 1B. However, since the amount of power generated by the solar power generation device (that is, the power that can be used in the house 1C and the house 1B) is different, the weight of the power sold. However, the house 1C and the house 1B are different. As described above, when the amount of power generated by the solar power generation device 6C of the house 1C is lower than the solar power generation devices 6A and 6B of the other homes 1A and 1B, the power selling unit price is increased, so that unfairness can be compensated. .

  The power coefficient is calculated and the reciprocal number is added to the standard price to calculate the power selling price. However, the power coefficient is not limited to the above, and the power generation amount difference or ratio may be calculated and reflected in the power selling price. . For example, calculate the difference between the average value of power generation and the power generation amount of each house and include it in the power coefficient. Calculate the difference between the minimum value (or maximum value) of power generation and the power generation amount of each house and calculate the power coefficient. The ratio between the minimum value (or maximum value) of the power generation amount and the power generation amount of each house is calculated and included in the power coefficient. In addition, as described later, by including the average power generation amount in the power coefficient, the power selling price can be set around the standard price. If this is not necessary, the first average power amount calculation unit 21 performs the setting. There is no need to calculate the average value of power generation. In addition, as a numerical value for the difference in the amount of power generated by the photovoltaic power generation apparatus, a coefficient indicating the installation status (a coefficient in which the number of floors on which the power generation panel is installed and the direction in which the power generation panel is directed) may be included in the power coefficient. .

  FIG. 3 is a graph of the example of FIG. 2, where the horizontal axis represents the reciprocal of the power coefficient depending on the amount of power generation, and the vertical axis represents the power selling unit price. As shown in this figure, the reciprocal of the power coefficient according to the power generation amount becomes 1.0 when the power generation amount in each of the houses 1A to 1C is equal to the average power generation amount, and is set to the standard price in the apartment house. When the power generation amount in each house 1A-1C is larger than the average power generation amount around the standard price, the power selling unit price is reduced, and when the power generation amount in each house 1A-1C is smaller than the average power generation amount, The unit price will increase.

  In addition, the power price adjustment unit 23 varies the standard price in the apartment house according to the amount of power collected in the surplus power recovery unit 24, and the power price supplied from the power company when the surplus power is less than a predetermined value. If the surplus power is higher than the specified value, the standard price will be lower than the power price supplied by the power company to increase or decrease the amount of power sold in the housing complex. Is possible.

FIG. 4 is a diagram illustrating an example of a purchase unit price and a purchase price when purchasing insufficient power in the homes 1D, 1E, and 1F. In order to simplify the description, the power generation panel area of the solar power generation devices of the houses 1D, 1E, and 1F is assumed to be 1 m ² . As shown in this figure, in the house 1D, the power generation amount of the solar power generation device 6D is 100 (kWh / m ² ) and the power consumption amount is 120 (kWh), so the purchased power amount is 20 (kWh). is there. In the house 1E, the power generation amount of the solar power generation device 6E is 100 (kWh / m ² ) and the power consumption amount is 150 (kWh), so the purchased power amount is 50 (kWh). In the house 1F, the power generation amount of the solar power generation device 6F is 60 (kWh / m ² ) and the power consumption amount is 110 (kWh), so the purchased power amount is 50 (kWh).

  The average value of the power generation amount in the solar power generation devices 6D to 6F of the houses 1D to 1F is 260 / 3≈86.7, and the power coefficient of the power generation amount in each house 1D to 1F is the power generation amount / power generation amount of each house. The average value is 1.15 (100 / 86.7) for the house 1D, 1.15 (100 / 86.7) for the house 1E, and 0.69 (60 / 86.7) for the house 1F. . Assuming that the standard price of power to be purchased is 40 (yen / kWh), the purchase unit price is 46.2 (yen / kWh) for house 1D, 46.2 (yen / kWh) for house 1E, and 27.7 for house 1F. (Yen / kWh), and the purchase price is 923 (yen) for the house 1D, 2,308 (yen) for the house 1E, and 1,385 (yen) for the house 1F.

  The amount of power purchased by the home 1F is 50 (kWh), which is the same as that of the home 1E, but the power generation amount of the solar power generation device (that is, the power that can be used in the home 1F and the home 1E) is different. 1F and house 1E are different. As described above, if the power generation amount of the house 1F is lower than the power generation amounts of the other houses 1D and 1E, the purchase unit price is lowered, so that unfairness can be compensated.

  The power coefficient is calculated and integrated with the standard price to calculate the purchase price. However, the power coefficient is not limited to the above, and the power generation amount difference or ratio may be calculated and reflected in the purchase price. For example, calculate the difference between the average value of power generation and the power generation amount of each house and include it in the power coefficient. Calculate the difference between the minimum value (or maximum value) of power generation and the power generation amount of each house and calculate the power coefficient. The ratio between the minimum value (or maximum value) of the power generation amount and the power generation amount of each house is calculated and included in the power coefficient. Further, as described later, by including the average power generation amount in the power coefficient, the purchase price can be set centering on the standard price. If this is not necessary, the first average power amount calculation unit 21 generates power. There is no need to find an average value.

  FIG. 5 is a graph of the example of FIG. 4, where the horizontal axis represents the power coefficient according to the amount of power generation, and the vertical axis represents the purchase unit price. The power coefficient according to the power generation amount is 1.0 when the power generation amount in each of the houses 1D to 1F is equal to the average power generation amount, and is set to the standard price in the apartment house. If the power generation amount in each house 1D-1F is larger than the average power generation amount around this standard price, the purchase unit price will be larger, and if the power generation amount in each house 1D-1F is smaller than the average power generation amount, the purchase unit price will be Get smaller.

  In addition, the power price adjustment unit 23 changes the standard price in the apartment according to the amount of power that can be provided by the insufficient power providing unit 25, and the power supplied from the power company when the power that can be provided is less than a predetermined value. Increase the standard price above the price, and increase or decrease the purchase amount of insufficient power in the apartment by lowering the standard price than the power price supplied by the power company when the available power is above the specified value It is possible to adjust.

  Next, the operation of the power trading system 100 according to the present embodiment will be described with reference to the flowcharts shown in FIGS. In addition, the element (for example, electric power generation amount measurement part 7) which performs the said step is described together in description of each step. If not particularly necessary, the letters A, B, C,... Are omitted.

  First, the power generation amount of the photovoltaic power generation device 6 is measured and stored for each house 1 (step 1, power generation amount measuring unit 7), and then the power consumption is measured and stored for each house 1 (step 2, power consumption). Quantity measuring unit 9). Next, the amount of power generated and the amount of power used are compared for each house 1, and if the amount of power generated exceeds the amount of power used, the difference is sold as surplus power (used power sales section 12), and the generated power is used. If it is less than the amount of power, the difference is purchased as insufficient power (step 3, insufficient power purchase unit 13).

  Next, the power trading device 2 collects surplus power in the house 1 and supplies the surplus power to the house 1 with insufficient power, and stores the amount of power sold and the amount of power purchased at this time (step 4, surplus power recovery unit) 24, the insufficient power supply unit 25). If there is a house 1 that does not have enough power even if purchased with insufficient power, power is supplied from the power company 15 to the house 1 (step 5, power meter 8).

  Next, it is determined whether or not a predetermined period (for example, one day) has passed (step 6, first average power calculation unit 21). If less than one day, the process returns to step 1, and if one day has passed. The power generation amount of each house 1 is totaled by the power transaction device 2, and the average power generation amount of the solar power generation devices 6 of all the houses 1 in a predetermined period (for example, one day) is calculated (step 7, first average power amount calculation) Part 21). Then, it is determined whether or not the calculated average power generation amount is equal to or greater than a predetermined value (for example, the power generation amount corresponding to one hour of solar radiation in the solar power generation device 6) (step 8, first average power amount calculation unit 21), If it is equal to or greater than the predetermined value, the power coefficient based on the amount of power generation is calculated for each house 1 (step 9, first power coefficient calculation unit 22). On the other hand, when the calculated average power generation amount is less than the predetermined value, it is determined that the solar power generation device 6 is not generating enough power due to rain or cloudy weather, and the power coefficient based on the weather power generation amount is “1”. 2 and the purchase price adjustment in FIG. 4 are substantially not performed (step 10, first power coefficient calculation unit 22).

  After performing one of the processes of Step 9 and Step 10, the power selling unit price and the purchasing unit price for each house 1 are calculated by the power coefficient based on the power generation amount. Then, the power sale price is calculated from the amount of power sold at the time of power sale, and the purchase price is calculated from the amount of power purchased at the time of purchase, and stored. Furthermore, the power selling price and the purchase price are notified to the user of each house 1 via the notifying unit 10 in each house 1 (step 11, power price adjusting unit 23).

  Next, it is determined whether or not a predetermined period (for example, one month) has elapsed (step 12, first average power amount calculation unit 21). If less than one month, the process returns to step 1 and one month has elapsed. In such a case, from the record of the power price adjustment unit 23, the total amount of power sold and sold at the time of selling power within a predetermined period (for example, for one month) for each house 1 and the total of the purchased amount and purchased price at the time of purchase are settled. . And while notifying to the user of each house 1 by the alerting | reporting part 10, it transmits to the settlement system (not shown) of a region (step 13, electric power price adjustment part 23).

  The regional settlement system settles the power sales / purchase amount of the apartment house and the entire area and settles it with the management fee of the apartment house and the local community association fee (step 14).

  As described above, according to the power trading system 100 of the present embodiment, the ratio between the power generation amount measured by the power generation amount measurement unit 7 and the average value calculated by the first average power amount calculation unit 21 for each house. When a certain power coefficient is calculated and power is traded between a plurality of houses 1, the transaction price is adjusted using the calculated power coefficient for each house, so that the solar power generation device 6 provided for each house Unfairness among houses due to the difference in power generation can be resolved.

  When selling the electric power generated by the solar power generation device 6 to another house, the power price adjusting unit 23 calculates the selling price by adding the reciprocal of the power coefficient of the house to sell to the standard price. When purchasing the power generated by the solar power generation device 6, the power price of the house to be purchased is added to the standard price to obtain the purchase price. Alternatively, the transaction price may be adjusted so that the reciprocal of the power coefficient of the house is added to the standard price only when selling power, or the power coefficient of the house to be purchased is added to the standard price only when purchasing.

  Further, in the power trading system 100 of the present embodiment, the power price adjustment unit 23 reverses the above, and when selling power, the power coefficient of the house to sell is integrated with the standard price, and when purchasing power, purchase is made. It is also possible to preferentially treat a house with a large amount of power generated by the solar power generation device 6 by adding the reciprocal of the power coefficient of the house to the standard price. For example, for a house in which the solar power generation device 6 is installed, the power price adjustment unit 23 sets the solar power generation device 6 for the first year after the installation (or until the amount of power traded in electricity reaches a predetermined value). Preferential treatment for houses with large amount of power generation, and power trading system including incentive to increase the power generation amount in the whole area by installing the solar power generation device 6 with larger power generation amount when installing the solar power generation device 6 in the house Can be considered.

  The power price adjustment unit 23 adjusts the transaction price as valid only when the power generation amount measured by the power generation amount measurement unit 7 is greater than or equal to a predetermined value or only when the average value of the power generation amount is greater than or equal to a predetermined value. You may make it perform.

(Embodiment 2)
FIG. 8 is a block diagram showing a schematic configuration of the power trading system 110 according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the part which is common in the electric power transaction system 100 of FIG. 1 mentioned above in the figure, and the description is abbreviate | omitted.

  The power trading system 100 according to the first embodiment determines a power selling unit price and a purchasing unit price by obtaining a power coefficient from the power generation amount of the solar power generation device 7, but the power trading system 110 according to the present embodiment is a house. A power coefficient is obtained from the amount of power used in 1 to determine a power selling unit price and a purchasing unit price.

  In the power trading system 110 according to the present embodiment, each house 1 has a function of outputting the measured power consumption to the power trading device 3 in order to obtain a power coefficient from the power consumption at the house 1. A measuring unit 91 is provided. In addition, the power trading device 3 of the system 110 includes a second average power amount calculating unit 31 that calculates an average value of the used power amount measured by the used power measuring unit 91 of each house 1 and the power used for each house. A second power coefficient calculation unit 32 that calculates a power coefficient that is a ratio of the used power amount measured by the amount measurement unit 91 and the average value calculated by the second average power amount calculation unit 31; The power price adjusting unit 23 adjusts the transaction price using the power coefficient calculated by the second power coefficient calculating unit 32 when trading power between the plurality of houses 1.

FIG. 9 is a diagram illustrating an example of a power selling unit price and a power selling price when surplus power is sold in the houses 1A, 1B, and 1C. In order to simplify the description, the power generation panel area of the solar power generation devices of the houses 1A, 1B, and 1C is assumed to be 1 m ² . In this figure, in the house 1A, the amount of power generated by the solar power generation device 6A is 100 (kWh / m ² ) and the amount of power used is 50 (kWh), so the amount of power sold is 50 (kWh). In the house 1B, the amount of power generated by the solar power generation device 6B is 100 (kWh / m ² ) and the amount of power used is 70 (kWh), so the amount of power sold is 30 (kWh). In the house 1C, the amount of power generated by the solar power generation device 6C is 60 (kWh / m ² ) and the amount of power used is 30 (kWh), so the amount of power sold is 30 (kWh).

  The average value of the power consumption in the houses 1A to 1C is 150 / 3≈50.0, and the reciprocal of the power coefficient of the power consumption in each house 1A to 1C is the average value of the power consumption / use of each house Since it is the amount of electric power, it is 1.00 (50.0 / 50) in the house 1A, 0.71 (50.0 / 70) in the house 1B, and 1.67 (50.0 / 30) in the house 1C. Assuming that the standard price of power to be sold is 40 (yen / kWh), the power selling unit price is 40.0 (yen / kWh) for the house 1A, 28.6 (yen / kWh) for the house 1B, and 66 for the house 1C. 7 (yen / kWh), and the selling price is 2,000 (yen) for the house 1A, 857 (yen) for the house 1B, and 2,000 (yen) for the house 1C.

  The amount of power sold by the house 1C is 30 (kWh), which is the same as that of the house 1B. However, since the amount of power used in the house is different, the weight of the power sold is different between the house 1C and the house 1B. As described above, if the amount of power used in the home 1C is lower than the amount of power used in the other homes 1A and 1B, the power selling unit price is increased, so that unfairness can be compensated.

  The power coefficient is calculated and the reciprocal number is added to the standard price to calculate the power selling price. However, the power coefficient is not limited to the above, and the power consumption difference or ratio can be calculated and reflected in the power selling price. Good. For example, calculate the difference between the average value of power consumption and the power consumption of each house and include it in the power coefficient. Calculate the difference between the minimum (or maximum) power consumption and the power consumption of each house And calculating the ratio between the minimum value (or maximum value) of the used power amount and the used power amount of each house and including it in the power coefficient. In addition, as described later, by including the average power consumption in the power coefficient, the power selling price can be set around the standard price. If this is not necessary, the second average power consumption calculation unit 31 is set. Therefore, it is not necessary to calculate the average power consumption.

  FIG. 10 is a graph of the example of FIG. 9, where the horizontal axis represents the reciprocal of the power coefficient depending on the amount of power used, and the vertical axis represents the power selling unit price. As shown in this figure, the reciprocal of the power coefficient according to the amount of power used is 1.0 when the amount used in each of the houses 1A to 1C is equal to the average amount used, and is set to the standard price in the apartment house. . When the usage amount in each of the houses 1A to 1C is larger than the average usage amount around the standard price, the power selling unit price is reduced, and when the usage amount in each of the houses 1A to 1C is smaller than the average usage amount, the power selling is performed. The unit price will increase.

FIG. 11 is a diagram illustrating an example of a purchase unit price and a purchase price when purchasing insufficient power in the homes 1D, 1E, and 1F. In order to simplify the description, the power generation panel area of the solar power generation devices of the houses 1D, 1E, and 1F is assumed to be 1 m ² . In this figure, in the house 1D, the power generation amount of the solar power generation device 6D is 100 (kWh / m ² ) and the power consumption amount is 120 (kWh), so the purchased power amount is 20 (kWh). In the house 1E, the power generation amount of the solar power generation device 6E is 100 (kWh / m ² ) and the power consumption amount is 150 (kWh), so the purchased power amount is 50 (kWh). In the house 1F, the power generation amount of the solar power generation device 6F is 60 (kWh / m ² ) and the power consumption amount is 110 (kWh), so the purchased power amount is 50 (kWh).

  The average value of the power consumption in the houses 1D to 1F is 380 / 3≈126.7, and the power coefficient according to the power consumption in each house 1D to 1F is the average value of the power consumption / power consumption in each house. Therefore, it is 0.95 (120 / 126.7) in the house 1D, 1.18 (150 / 126.7) in the house 1E, and 0.87 (110 / 126.7) in the house 1F. Assuming that the standard price of purchased power is 40 (yen / kWh), the purchase unit price is 37.9 (yen / kWh) for house 1D, 47.4 (yen / kWh) for house 1E, and 34.7 for house 1F. (Yen / kWh), and the purchase price is 758 (yen) for the house 1D, 2,368 (yen) for the house 1E, and 1,737 (yen) for the house 1F.

  The amount of power purchased by the house 1F is 50 (kWh), which is the same as that of the house 1E. However, since the amount of power used in the house is different, the weight of the purchased power is different between the house 1F and the house 1E. As described above, if the amount of power used in the home 1F is lower than the amount of power used in the other homes 1D and 1E, the purchase unit price is reduced, so that unfairness can be compensated.

  The power coefficient is calculated and integrated with the standard price to calculate the purchase price. However, the power coefficient is not limited to the above, and the difference or ratio of the power consumption may be calculated and reflected in the purchase price. For example, calculate the difference between the average value of power consumption and the power consumption of each house and include it in the power coefficient. Calculate the difference between the minimum (or maximum) power consumption and the power consumption of each house And calculating the ratio between the minimum value (or maximum value) of the used power amount and the used power amount of each house and including it in the power coefficient. Further, as described later, by including the average power consumption in the power coefficient, the purchase price can be set around the standard price. If this is not necessary, the second average power consumption calculation unit 31 performs the setting. There is no need to obtain an average value of the power consumption.

  FIG. 12 is a graph of the example of FIG. 11, where the horizontal axis represents the power coefficient according to the amount of power used, and the vertical axis represents the purchase unit price. The power coefficient based on the amount of power used is 1.0 when the amount used in each house is equal to the average amount used, and is set to the standard price in the apartment house. When the usage amount in each house 1D to 1F is larger than the average usage amount around the standard price, the purchase unit price becomes larger, and when the usage amount in each house 1D to 1F is smaller than the average usage amount, the purchase unit price is Get smaller.

  Next, the operation of the power trading system 110 according to the present embodiment will be described with reference to the flowcharts shown in FIGS. In addition, the element (for example, electric power generation amount measurement part 7) which performs the said step is described together in description of each step. If not particularly necessary, the letters A, B, C,... Are omitted.

  First, the power generation amount of the photovoltaic power generation device 6 is measured and stored for each house 1 (step 1, power generation amount measuring unit 7), and then the power consumption is measured and stored for each house 1 (step 2, power consumption). Quantity measuring unit 91). Next, the power generation amount and the power consumption amount are compared for each house 1, and if the power generation amount exceeds the power consumption amount, the difference is sold as surplus power (the surplus power selling section 12), and the power generation amount is used. If it is less than the amount of power, the difference is purchased as insufficient power (step 3, insufficient power purchase unit 13).

  Next, the power trading device 3 collects surplus power in the house 1 and supplies the surplus power to the house 1 with insufficient power, and stores the amount of power sold and the amount of power purchased at this time (step 4, surplus power recovery unit) 24, the insufficient power supply unit 25). If there is a house 1 that does not have enough power even if purchased with insufficient power, power is supplied from the power company 15 to the house 1 (step 5, power meter 8).

  Next, it is determined whether or not a predetermined period (for example, one day) has elapsed (step 26, second average power calculation unit 31). If less than one day, the process returns to step 1, and if one day has elapsed The power generation device 3 aggregates the power generation amount and the power consumption amount of each house 1 and calculates the average power generation amount and the average power consumption amount of the solar power generation devices 6 of all the houses 1 in a predetermined period (for example, one day) (step) 27, a second average power amount calculation unit 31). Then, it is determined whether or not the calculated average power generation amount is equal to or greater than a predetermined value (for example, the power generation amount corresponding to one hour of solar radiation in the solar power generation device 6) (step 18, second average power amount calculation unit 31), If it is equal to or greater than the predetermined value, the power coefficient based on the amount of power used is calculated for each house 1 (step 29, second power coefficient calculation unit 32). On the other hand, if the calculated average power generation amount is less than the predetermined value, it is determined that the solar power generation device 6 is not generating enough power due to rain or cloudy weather, and the power coefficient based on the power consumption is “1”. As shown in FIG. 9, the power selling price adjustment in FIG. 9 and the purchase price adjustment in FIG. 11 are substantially not performed (step 30, second power coefficient calculation unit 32).

  Although not shown, it is determined whether or not the average power consumption calculated at this time is equal to or greater than a predetermined value (for example, 33% or more of the average power consumption) (second average power energy calculation unit 31). When it is above, the power coefficient based on the amount of power used is calculated for each house 1 (second power coefficient calculation unit 32). On the other hand, when the calculated average power generation amount is less than a predetermined value, a limit may be set by setting the power coefficient based on the power consumption amount to “3”.

  After performing one of the processes of step 29 and step 30, the power selling unit price and the purchasing unit price for each house 1 are calculated based on the power coefficient based on the amount of power used. Then, the power sale price is calculated from the amount of power sold at the time of power sale, and the purchase price is calculated from the amount of power purchased at the time of purchase, and stored. Furthermore, the power selling price and the purchase price are notified to the user of each house 1 via the notifying section 10 in each house 1 (step 31, power price adjusting section 23).

  Next, it is determined whether or not a predetermined period (for example, one month) has passed (step 32, second average power amount calculation unit 31). If less than one month, the process returns to step 1 and one month has passed. In such a case, from the record of the power price adjustment unit 23, the total amount of power sold and sold at the time of selling power within a predetermined period (for example, for one month) for each house 1 and the total of the purchased amount and purchased price at the time of purchase are settled. . And while notifying to the user of each house 1 by the alerting | reporting part 10, it transmits to the settlement system (not shown) of a region (step 13, electric power price adjustment part 23).

  The regional settlement system settles the power sales / purchase amount of the apartment house and the entire area and settles it with the management fee of the apartment house and the local community association fee (step 14).

  As described above, according to the power trading system 110 of the present embodiment, the power consumption measured by the power consumption measuring unit 91 and the average value calculated by the second average power calculation unit 31 for each house. When the power coefficient that is the ratio is calculated and the power is traded between the plurality of houses 1, the transaction price is adjusted using the calculated power coefficient for each house, so the photovoltaic power generator 6 provided for each house Can eliminate the unfair feeling among the houses due to the difference in the amount of power generated (if the amount of power generated by the solar power generation device 6 is large, the amount of power sold increases even if the amount of power used in the house is the same) . In addition, because the electricity sales price and purchase price are more advantageous for houses with less power consumption, the reduction in power consumption will proceed, and if surplus power increases in the entire apartment house, surplus power may be sold to other apartment houses, etc. It becomes possible. In addition, since the power coefficient is obtained from the amount of power used in the house, a house that does not include the solar power generation device 6 can also participate in the power transaction system 110 of the present embodiment to reduce the power used.

  When selling the electric power generated by the solar power generation device 6 to another house, the power price adjusting unit 23 calculates the selling price by adding the reciprocal of the power coefficient of the house to sell to the standard price. When purchasing the power generated by the solar power generation device 6, the power price of the house to be purchased is added to the standard price to obtain the purchase price. Alternatively, the transaction price may be adjusted so that the reciprocal of the power coefficient of the house is added to the standard price only when selling power, or the power coefficient of the house to be purchased is added to the standard price only when purchasing.

  Also, in the power trading system 110 of the present embodiment, the power price adjustment unit 23 reverses the above, and when selling power, the power coefficient of the house to sell is integrated with the standard price, and when purchasing power, purchase. It is also possible to give preferential treatment to a house with a large amount of power consumption by adding the reciprocal of the power coefficient of the house to the standard price. For example, for a house in which the solar power generation device 6 is installed, the house in which the power price adjustment unit 23 uses a large amount of power for the first year after the installation (or until the amount of power used for power trading reaches a predetermined value). An electric power transaction system including an incentive to install the solar power generation device 6 in a house with a large amount of electric power consumption can be considered.

(Embodiment 3)
FIG. 15 is a block diagram showing a schematic configuration of the power trading system 120 according to the third embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the part which is common in the electric power transaction system 100 of FIG. 1 mentioned above in FIG. 1 and the electric power transaction system 110 of FIG. 8, and the description is abbreviate | omitted.

  The power trading system 100 according to the first embodiment described above determines a power selling unit price and a purchasing unit price by obtaining a power coefficient from the power generation amount of the solar power generation device 6, but the power trading system 120 according to the present embodiment is a house. 1 is used to determine a power coefficient from the amount of power generated by the solar power generation device 6 and the amount of power used, thereby determining the unit price for power sale and the unit price for purchase.

  In the power transaction system 120 of the present embodiment, the power coefficient is obtained from the amount of power generated by the solar power generation device 6 and the amount of power used in the house 1, so that each house 1 is measured as in the second embodiment. The used electric energy measuring part 91 which has the function to output the used electric energy to the electric power transaction apparatus 4 is provided. In addition, the power transaction device 4 of the system 120 calculates the average value of the power generation amount per unit area using the power generation amount measured by the power generation amount measuring unit 7 of each house 1 and uses the power consumed by each house 1. A third average power amount calculation unit 41 that calculates an average value of the used power amount measured by the measurement unit 91, and a power generation amount and a third average power amount calculation unit that are measured by the power generation amount measurement unit 7 for each house. The third integrated with the ratio between the average value calculated at 41 and the ratio between the used power amount measured by the used power amount measuring unit 91 and the average value calculated by the third average power amount calculating unit 41. The power price adjustment unit 23 uses the calculation result (power coefficient) of the third power coefficient calculation unit 42 when trading power between a plurality of houses 1. To adjust the transaction price.

FIG. 16 is a diagram illustrating an example of a power selling unit price and a power selling price when surplus power is sold in the houses 1A, 1B, and 1C. In order to simplify the description, the power generation panel area of the solar power generation devices of the houses 1A, 1B, and 1C is assumed to be 1 m ² . In this figure, in the house 1A, the amount of power generated by the solar power generation device 6A is 100 (kWh / m ² ) and the amount of power used is 50 (kWh), so the amount of power sold is 50 (kWh). In the house 1B, the amount of power generated by the solar power generation device 6B is 100 (kWh / m ² ) and the amount of power used is 70 (kWh), so the amount of power sold is 30 (kWh). In the house 1C, the amount of power generated by the solar power generation device 6C is 60 (kWh / m ² ) and the amount of power used is 30 (kWh), so the amount of power sold is 30 (kWh).

  The average value of the power generation amount of the solar power generation device 6 in the houses 1A to 1C is 260 / 3≈86.7, and the average value of the power consumption is 150 / 3≈50.0. The reciprocal of the power coefficient depending on the amount of power generation and the amount of power used is (average value of power generation / power generation amount of each house) × (average value of power consumption / power consumption of each house), so that it is 0 for the house 1A. .87 ((86.7 / 100) × (50/50)), 0.62 ((86.7 / 100) × (50/70)) for House 1B, and 2.41 ((86.50) for House 1C. 7/60) × (50/30)). Assuming that the standard price of electric power to be sold is 40 (yen / kWh), the unit price of electricity sold is 34.7 (yen / kWh) for the house 1A, 24.8 (yen / kWh) for the house 1B, and 96 for the house 1C. .3 (yen / kWh), and the selling price is 1,733 (yen) for the house 1A, 743 (yen) for the house 1B, and 2,889 (yen) for the house 1C.

  The amount of power sold by the home 1C is 30 (kWh), the same as that of the home 1B, but the amount of power generated by the solar power generation device (that is, the power that can be used in the home 1C and the home 1B) is different, and in addition, it is used in the home. Since the amount of electric power is different, the weight of the electric power sold is different between the house 1C and the house 1B. As described above, when the power generation amount and the power consumption amount in the house 1C are lower than the power generation amount and the power consumption amount in the other homes 1A and 1B, the power selling unit price is increased, so that unfairness can be compensated.

  The power coefficient is calculated and the reciprocal number is added to the standard price to calculate the power selling price, but the power coefficient is not limited to the above, and the difference or ratio between the power generation amount and the power consumption is calculated and reflected in the power selling price. You may let them. In addition, by including the average power generation amount and the amount of power used in the power coefficient, the power selling price can be set around the standard price as will be described later. It is not necessary for the calculation unit 41 to obtain the average value of the power generation amount and the average value of the power consumption amount.

  FIG. 17 is a graph of the example of FIG. 16, where the horizontal axis represents the power generation amount and the reciprocal of the power coefficient depending on the amount of power used, and the vertical axis represents the power selling unit price. As shown in this figure, the reciprocal of the power coefficient based on the amount of power generated and the amount of power used is when the product of the amount of power generated and the amount of power used in each house 1A to 1C is equal to the product of the average amount of power generated and the amount of power used. 1.0, which is set to the standard price in the apartment house. Centering on this standard price, if the product of the amount of power generated and the amount of power used in each house 1A-1C is greater than the product of the average amount of power generated and the amount of power used, the selling price will decrease, and each house 1A-1C will If the product of the amount of power generated and the amount of power used becomes smaller than the product of the average amount of power generated and the amount of power used, the selling price will increase.

FIG. 18 is a diagram illustrating an example of a purchase unit price and a purchase price when purchasing insufficient power in the homes 1D, 1E, and 1F. In order to simplify the description, the power generation panel area of the solar power generation devices of the houses 1D, 1E, and 1F is assumed to be 1 m ² . In this figure, in the house 1D, the power generation amount of the solar power generation device 6D is 100 (kWh / m ² ) and the power consumption amount is 120 (kWh), so the purchased power amount is 20 (kWh). In the house 1E, the power generation amount of the solar power generation device 6E is 100 (kWh / m ² ) and the power consumption amount is 150 (kWh), so the purchased power amount is 50 (kWh). In the house 1F, the power generation amount of the solar power generation device 6F is 60 (kWh / m ² ) and the power consumption amount is 110 (kWh), so the purchased power amount is 50 (kWh).

  The average value of the power generation amount of the solar power generation devices in the houses 1D to 1F is 260 / 3≈86.7, and the average value of the power consumption is 380 / 3≈126.7, and the power generation in each house 1D to 1F The power coefficient based on the amount and the amount of power used is (the amount of power generated by each house / the average value of power generation) × (the amount of power used by each house / the average value of power used). (100 / 86.7) × (120 / 126.7)), 1.37 ((100 / 86.7) × (150 / 126.7)) for house 1E, 0.60 ((60 /86.7)×(110/126.7)). Assuming that the standard price of purchased power is 40 (yen / kWh), the purchase unit price is 43.7 (yen / kWh) for house 1D, 54.7 (yen / kWh) for house 1E, and 24.0 for house 1F. (Yen / kWh), and the purchase price is 847 (yen) for the house 1D, 2,733 (yen) for the house 1E, and 1,202 (yen) for the house 1F.

  The amount of power purchased by the home 1F is 50 (kWh), which is the same as that of the home 1E, but the amount of power generated by the solar power generation device (that is, the power that can be used in the home 1F and the home 1E) is different. Since the amount is different, the weight of power to be purchased is different between the house 1F and the house 1E. As described above, if the power generation amount and the amount of power used in the house 1F are lower than the power generation amount and the amount of use in the other houses 1D and 1E, the purchase unit price is reduced, so that unfairness can be compensated.

  The power coefficient is calculated and integrated with the standard price to calculate the purchase price. However, the power coefficient is not limited to the above, and the difference or ratio between the power generation amount and the power consumption amount may be calculated and reflected in the purchase price. Further, as described later, by including the average power consumption in the power coefficient, the purchase price can be set around the standard price. If this is not necessary, the third average power consumption calculation unit 41 can set the purchase price. There is no need to calculate the average value of power generation and the average value of power consumption.

  FIG. 19 is a graph of the example of FIG. 18, where the horizontal axis represents the power generation amount and the amount of power used, and the vertical axis represents the purchase unit price. The power coefficient based on the amount of power generated and the amount of power used is 1.0 when the product of the amount of power generated and the amount of power used in each home 1D to 1F is equal to the product of the average amount of power generated and used. Set to price. If the product of the amount of power generated and the amount of power used in each house 1D-1F is greater than the product of the average amount of power generated and the amount used, centered on this standard price, the purchase price will increase, and the amount of power generated in each house 1D-1F The unit price of purchase becomes smaller when the product of power consumption and the power consumption becomes smaller than the product of average power generation and usage.

  Next, the operation of the power trading system 120 according to the present embodiment will be described with reference to the flowcharts shown in FIGS. In addition, the element (for example, electric power generation amount measurement part 7) which performs the said step is described together in description of each step. If not particularly necessary, the letters A, B, C,... Are omitted.

  First, the power generation amount of the photovoltaic power generation device 6 is measured and stored for each house 1 (step 1, power generation amount measuring unit 7), and then the power consumption is measured and stored for each house 1 (step 2, power consumption). Quantity measuring unit 91). Next, the power generation amount and the power consumption amount are compared for each house 1, and if the power generation amount exceeds the power consumption amount, the difference is sold as surplus power (the surplus power selling section 12), and the power generation amount is used. If it is less than the amount of power, the difference is purchased as insufficient power (step 3, insufficient power purchase unit 13).

  Next, the power trading device 4 collects surplus power of the house 1 and supplies it to the house 1 with insufficient power, and stores the amount of power sold and the amount of power purchased at this time (step 4, surplus power recovery unit) 24, the insufficient power supply unit 25). If there is a house 1 that does not have enough power even if purchased with insufficient power, power is supplied from the power company 15 to the house 1 (step 5, power meter 8).

  Next, it is determined whether or not a predetermined period (for example, one day) has passed (step 46, third average power calculation unit 41). If less than one day, the process returns to step 1, and if one day has passed. The power generation apparatus 4 totals the power generation amount and the power consumption amount of each house 1 and calculates the average power generation amount and the average power consumption amount of the solar power generation devices 6 of all the houses 1 in a predetermined period (for example, one day) (step) 47, a third average power amount calculation unit 41). Then, it is determined whether or not the calculated average power generation amount is equal to or greater than a predetermined value (for example, the power generation amount corresponding to one hour of solar radiation in the solar power generation device 6) (step 48, third average power amount calculation unit 41), If it is equal to or greater than the predetermined value, a power coefficient based on the amount of power generated and the amount of power used is calculated for each house 1 (step 49, third power coefficient calculator 42). On the other hand, when the calculated average power generation amount is less than the predetermined value, it is determined that the solar power generation device 6 is not generating enough power due to rain or cloudy weather, and the power coefficient based on the power generation amount and the power consumption amount is calculated. It is assumed that the power selling price adjustment in FIG. 16 and the purchase price adjustment in FIG. 18 are not substantially performed as “1” (step 50, third power coefficient calculation unit 42).

  After performing one of the processes of step 49 and step 50, the power selling unit price and the purchasing unit price for each house 1 are calculated by the power coefficient based on the power generation amount and the power consumption amount. Then, the power sale price is calculated from the amount of power sold at the time of power sale, and the purchase price is calculated from the amount of power purchased at the time of purchase, and stored. Furthermore, the power selling price and the purchase price are notified to the user of each house 1 via the notifying unit 10 in each house 1 (step 51, power price adjusting unit 23).

  Next, it is determined whether or not a predetermined period (for example, one month) has passed (step 52, third average power amount calculation unit 41). If less than one month, the process returns to step 1 and one month has passed. In this case, from the record of the electric power price adjusting unit 23, the total amount of the electric power sold at the time of selling electric power and the electric power selling price within a predetermined period (for example, one month) for each house 1 and the total of the purchased amount and the purchased price at the time of purchase are settled. And while notifying to the user of each house 1 by the alerting | reporting part 10, it transmits to the settlement system (not shown) of a region (step 13, electric power price adjustment part 23).

  The regional settlement system settles the power sales / purchase amount of the apartment house and the entire area and settles it with the management fee of the apartment house and the local community association fee (step 14).

  As described above, according to the power trading system 120 of the present embodiment, the ratio between the power generation amount measured by the power generation amount measurement unit 7 and the average value calculated by the third average power amount calculation unit 41 for each house. While calculating a certain electric power coefficient (this is called the 1st electric power coefficient), the used electric energy measured by the used electric energy measuring part 91 and the average value calculated by the 3rd average electric energy calculating part 41 Calculate a power coefficient that is a ratio (referred to as the second power coefficient), and further calculate a product of the first and second power coefficients (referred to as the third power coefficient), and a plurality of houses Since the transaction price is adjusted using the third power coefficient when trading electricity between the houses, there is an unfair feeling among houses due to the difference in the amount of power generated by the solar power generation device 6 provided for each house. Can be resolved.

  When selling the electric power generated by the solar power generation device 6 to another house, the power price adjusting unit 23 calculates the selling price by adding the reciprocal of the power coefficient of the house to sell to the standard price. When purchasing the power generated by the solar power generation device 6, the power price of the house to be purchased is added to the standard price to obtain the purchase price. Alternatively, the transaction price may be adjusted so that the reciprocal of the power coefficient of the house is added to the standard price only when selling power, or the power coefficient of the house to be purchased is added to the standard price only when purchasing.

  The power trading system 120 according to the present embodiment reverses the above by the power price adjustment unit 23, adds the power coefficient of the house to sell to the standard price when selling power, and purchases when purchasing power. It is also possible to temporarily give preferential treatment to a house with a large amount of power generation or power consumption by adding the reciprocal of the power coefficient of the house to the standard price.

  In addition, although the electric power transaction systems 100-120 of the said Embodiment 1-3 are what sells and purchases the electric power generated with the solar power generation device 6, using natural energy, such as a wind power generator. Of course, it is also possible to sell and purchase electric power generated in a house equipped with a distributed power generation device such as a power generation device or a cogeneration device such as a fuel cell. In buildings such as houses and facilities equipped with natural energy generating equipment that generates a difference in power generation due to natural conditions such as installation location, and cogeneration equipment that generates a difference in power generation due to the demand for thermal energy generated simultaneously with power In addition, unfairness due to the difference in the amount of power generated by the power generation device among a plurality of houses can be eliminated.

  In addition, it is possible to give an incentive to reduce power purchase and increase power sales by reducing the power used not only in houses with a large amount of power generation but also in houses with a small amount of power generation. By promoting self-sufficiency of power in multiple dwellings and the entire region and selling surplus power to others, the asset value of distributed generators can be increased.

  In addition, the power transaction systems 100 to 120 according to the first to third embodiments are not limited to power transactions in collective housing and condominiums, but also connect small and distributed power generation, and operate efficiently in the region. It is also effective in a microgrid that adjusts the supply-demand balance.

  The present invention can eliminate unfairness caused by the difference in the amount of power generated by power generators when dealing with surplus power in an apartment house or a region where a distributed power generator such as a solar power generator is installed. Therefore, it is possible to apply the present invention to an electric power transaction system that enables transactions in an area where surplus electric power generated by a power generation device is available.

1A, 1B, 1C, 1D, 1E, 1F Housing 2, 3, 4 Electricity transaction device 6A, 6B, 6C Photovoltaic power generation device 7A, 7B, 7C Power generation amount measuring unit 8A, 8B, 8C Electricity meter 9A, 9B, 9C , 91A, 91B, 91C Power consumption measuring unit 10A, 10B, 10C Notification unit 11A, 11B, 11C Electric equipment 12A, 12B, 12C Surplus power selling unit 13A, 13B, 13C Underpower purchasing unit 15 Electric power company 21 1st Average power amount calculation unit 22 first power coefficient calculation unit 23 power price adjustment unit 24 surplus power recovery unit 25 insufficient power supply unit 31 second average power amount calculation unit 32 second power coefficient calculation unit 41 third Average power amount calculation unit 42 Third power coefficient calculation unit 100, 110, 120 Power trading system

Claims (7)

In the power trading system for trading the power generated by the distributed power generator provided in each of the plurality of houses between the plurality of houses,
A power generation amount measuring means that is provided in each of the plurality of houses and measures the power generation amount of the distributed power generator for each house;
First average power amount calculating means for calculating an average value of the power generation amount measured by each of the plurality of power generation amount measuring means;
First power coefficient calculation means for calculating a power coefficient that is a ratio between the power generation amount measured by the power generation amount measurement means and the average value calculated by the first average power amount calculation means for each house;
Power price adjusting means for adjusting a transaction price using the power coefficient calculated by the first power coefficient calculating means when trading power between the plurality of houses;
Power trading system with In the power trading system for trading the power generated by the distributed power generator provided in each of the plurality of houses between the plurality of houses,
A power consumption measuring means provided in each of the plurality of houses, for measuring the power consumption for each house;
A second average power consumption calculating means for calculating an average value of the power consumption measured by each of the plurality of power consumption measuring means;
Second power coefficient calculating means for calculating a power coefficient that is a ratio between the used power amount measured by the used power amount measuring means and the average value calculated by the second average power amount calculating means for each house; ,
Power price adjusting means for adjusting the transaction price using the power coefficient calculated by the second power coefficient calculating means when trading power between the plurality of houses;
Power trading system with In the power trading system for trading the power generated by the distributed power generator provided in each of the plurality of houses between the plurality of houses,
A power generation amount measuring means that is provided in each of the plurality of houses and measures the power generation amount of the distributed power generator for each house;
A power consumption measuring means provided in each of the plurality of houses, for measuring the power consumption for each house;
A third average power amount calculation that calculates an average value of the power generation amount measured by each of the plurality of power generation amount measurement means and calculates an average value of the power consumption amount measured by each of the plurality of power consumption measurement units. Means,
The ratio of the power generation amount measured by the power generation amount measuring means for each house to the average value of the power generation amount calculated by the third average power amount calculation means and the power consumption amount measured by the power consumption measurement means And third power coefficient calculating means for calculating a product of the ratio of the average value of the used electric energy calculated by the third average electric energy calculating means,
Power price adjusting means for adjusting the transaction price using the power coefficient calculated by the third power coefficient calculating means when trading power between the plurality of houses;
Power trading system with   The power price adjusting means, when selling the power generated by the distributed power generation device to another house, obtains a power selling price by adding the reciprocal of the power coefficient of the house to be sold to a standard price. The power trading system according to any one of claims 1 to 3.   The power price adjusting means, when purchasing power generated by the distributed power generation device of another house, calculates the purchase price by adding the power coefficient of the house to be purchased to a standard price. Item 5. The power trading system according to any one of Items 4 to 5. A control method of a power trading system for trading power generated by a distributed power generator provided in each of a plurality of houses between the plurality of houses,
A power generation amount measuring step for measuring the power generation amount of the distributed power generator for each house;
A first average power amount calculating step for calculating an average value of the power generation amount for each house measured in the power generation amount measuring step;
First power coefficient calculation for calculating a power coefficient that is a ratio of an average value of the power generation amount for each house measured in the power generation amount measurement step and the power generation amount calculated in the first average power amount calculation step Steps,
A power price adjustment step of adjusting a transaction price using the power coefficient calculated in the first power coefficient calculation step when trading power between the plurality of houses;
A method for controlling a power trading system comprising:   The program which makes a computer perform the control method of the electric power transaction apparatus of Claim 6.

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