Power supply system

Abstract

To provide a power supply system capable of ensuring a reduction fee to an owner of a composite facility.SOLUTION: A power supply system that supplies power to a composite facility including multiple power supply destinations comprises a managing device. The managing device comprises a reduction fee calculating unit which reads a reduction fee for an owner of the composite facility from a necessary reduction amount-of-money storing unit, and calculates the reduction fee. The reduction fee for the owner of the composite facility is registered in advance in the necessary reduction amount-of-money storing unit as a fixed amount of money.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a power supply system that supplies power to a complex facility including a plurality of power supply destinations.

Background Art

[0002] In recent years, power supply systems equipped with distributed power sources such as storage batteries and solar cells and connected to the commercial power grid have become widespread. Among them, as a power supply system for supplying power to a complex facility including a plurality of power supply destinations, there is a power supply system (90) in a complex customer facility that enters into a low-voltage bulk power reception contract with power less than the power required for a high-voltage bulk power reception contract. The power supply system includes a bulk power reception panel (2) that receives power from a power grid (80), a master meter device (1) that measures the power consumption of the complex customer facility, a distribution panel (4) that supplies the power received by the bulk power reception panel (2) to a plurality of customer facilities within the complex customer facility, and a distributed power source (3) that can supply power to the plurality of customer facilities. Such a system is known (for example, see Patent Document 1).

[0003] This power supply system is for realizing a reduction in electricity charges when performing bulk power reception. However, in the above system, the reduction in electricity charges does not necessarily enable the benefits of self-generated power by the distributed power source to be shared between both the owner of the complex facility and the plurality of power supply destinations in the complex facility. Also, when the discount amount for the occupants of the plurality of power supply destinations in the complex facility is determined to be a fixed amount at the time of contract, there is a possibility that the reduction in electricity charges for the owner of the complex facility cannot be ensured due to fluctuations in the amount of power generated by solar power generation and the amount of electricity used.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present invention has been made in view of the above problems, and in a power supply system, it is an ultimate object to provide a technology capable of securing a reduction fee for the owner of a complex facility regardless of fluctuations in the profit of self-generation by distributed power sources.

Means for Solving the Problems

[0006] The present invention for solving the above problems is supplying power to a complex facility including a plurality of power supply destinations, a distributed power source capable of supplying power to the plurality of power supply destinations, a power distribution device that distributes and supplies the power supplied from the system and / or the power supplied from the distributed power source to each of the plurality of power supply destinations, power detection means for detecting the power supplied to each of the plurality of power supply destinations via the power distribution device, system power detection means for detecting the power exchanged between the system and the power distribution device, a control device for controlling the power related to charging / discharging or power generation of the distributed power source based on the power value detected by the power detection means, a power supply system including a management device that calculates the electricity charge to be billed to each of the plurality of power supply destinations and the reduction fee for the owner of the complex facility based on the power values detected by the power detection means and the system power detection means, The management device is characterized by having a required reduction amount storage unit in which the reduction fee for the owner is registered in advance as a fixed amount, and a reduction fee calculation unit that reads out the reduction fee for the owner of the complex facility from the required reduction amount storage unit.

[0007] According to the present invention, it is possible to secure a reduction fee for the owner of a complex facility regardless of the fluctuation of the profit from self-generation by a distributed power source, and it becomes possible to more surely ensure the profit obtained by the owner of the complex facility incorporating the power supply system in the present invention into the complex facility.

[0008] Further, in the present invention, the management device includes a standard electricity charge calculation unit that calculates a standard electricity charge based on a standard electricity unit price that is a standard unit price of the electricity supplied from the grid and an electricity value detected by the electricity detection means, a power purchase charge calculation unit that calculates a power purchase charge based on a power purchase unit price that is an electricity unit price when purchasing electricity from the grid and an electricity value detected by the grid electricity detection means, and an operation profit calculation unit that calculates an operation profit by subtracting the power purchase charge calculated by the power purchase charge calculation unit from the standard electricity charge calculated by the standard electricity charge calculation unit. The reduction fee calculation unit may be configured such that when the operation profit calculated by the operation profit calculation unit is less than the reduction fee read from the necessary reduction amount storage unit, the amount of the operation profit is set as the value of the reduction fee. According to this, it is possible to calculate the reduction fee for the owner of the complex facility with higher accuracy by a simpler calculation. When an operation fee for the power supply system occurs, the operation profit calculation unit calculates the operation profit by further subtracting the operation fee from the fee obtained by subtracting the power purchase charge from the standard electricity charge.

[0009] In the present invention, the management device calculates a discount fund to be used for discounts for the power supply destinations by subtracting the reduction fee calculated by the reduction fee calculation unit and the management fee of the power supply system from the operation profit calculated by the operation profit calculation unit. The management device further includes a discount fund calculation unit and an electricity fee calculation unit. The discount fund calculation unit calculates the discount amount for each of the plurality of power supply destinations from the discount fund calculated by the discount fund calculation unit, and subtracts the discount amount from the individual standard electricity fees for each of the plurality of power supply destinations calculated from the standard electricity fee to calculate the electricity fee. According to this, it is possible to calculate the discount amount for each resident with higher accuracy by simpler calculations.

[0010] In the present invention, the management device further includes a discount fund storage unit that stores the history of the discount fund calculated by the discount fund calculation unit. The electricity fee calculation unit calculates the electricity fee for the current month by subtracting the discount amount for the previous month calculated from the discount fund for the previous month stored in the discount fund storage unit from the individual standard electricity fee for the current month. According to this, it is possible to accumulate the discount funds from the past as data in the management device and easily retrieve the data related to the discount funds. As a result, it is possible to efficiently proceed with the calculation work and the billing work of the electricity fee for the current month.

[0011] In the present invention, a reference discount amount, which is a fixed discount amount for each of the power supply destinations, is registered in advance in the management device. When the discount amount in a predetermined month is less than the reference discount amount, the difference between the discount amount and the reference discount amount in that month is compensated from the difference between the discount amount and the reference discount amount in the month when the discount amount exceeds the reference discount amount. According to this, it is possible to prevent the discount amount for each resident from becoming a negative value, that is, an increase in the charge, and to prevent each resident from suffering disadvantages caused by the introduction of this power supply system.

[0012] Further, the present invention may be a power supply system characterized in that the discount amount is an equal value for each of the plurality of power supply destinations. According to this, since the same discount amount is applied to each of the plurality of power supply destinations, it is possible to prevent unfairness regarding the discount amount for each power supply destination.

[0013] Further, in the present invention, the power supply system may be characterized in that the discount amount is paid in full to a single account. According to this, it is possible to manage the discount amount more easily and efficiently.

[0014] Note that the means for solving the above problems can be used in combination with each other as much as possible.

Advantages of the Invention

[0015] According to the present invention, it becomes possible to secure a reduced fee for the owner of the complex facility. As a result, it is possible to promote the introduction of the power supply system by the owner of the complex facility. In addition, it is possible to improve the incentive for improving the self-consumption rate of the residents of the complex facility.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0017] 〔Applicable Example〕 In the power supply system in this applicable example, when billing each power supply destination in a complex facility including a plurality of power supply destinations with an electricity charge according to the power generation amount of solar power generation or the electricity consumption amount, a reduction charge for the owner of the complex facility is registered in advance as a fixed amount, so that it is possible to secure the profit of the owner regardless of the fluctuation of the profit of self-generated electricity by distributed power sources. It has a mechanism.

[0018] FIG. 1 is a block diagram showing a schematic configuration of a power supply system 1 to which the present invention is applicable. As shown in FIG. 1, the power supply system 1 has a mechanism for supplying power to the exclusive parts 12a, 12b, 12c... and the common part 13 in the apartment house 1a. The power supply system 1 includes a management device 2 outside the apartment house 1a, and a distributed power source (such as a storage battery 14 and a solar cell 15 as examples), a power distribution device (such as a first distribution board 9 and a second distribution board 10 as examples), and a power detection means (such as smart meters 11a, 11b, 11c... 11d, 11e, etc.) and grid power detection means (such as master smart meters 4a, 4b, etc.) and a VPP controller 5. In FIG. 1, the solid lines connecting the blocks indicate power lines, and the broken lines connecting the blocks indicate communication lines (including wireless communication). The power supply system 1 according to this applicable example is premised on being applied to the apartment house 1a. In this case, the apartment house 1a is an example of a complex facility including a plurality of power supply destinations. It is also premised on having a distributed power source such as a so-called V2H (Vehicle to Home) related power source such as a solar cell or a wind turbine and a storage battery.

[0019] In FIG. 1, the power supply system 1 is electrically connected to power grids 3a and 3b. When the power supplied by the distributed power source is less than the power consumption at a plurality of power supply destinations and there is a power shortage, for example, it is possible to purchase power from the power grid 3a. Also, when the power supplied by the distributed power source is more than the power consumption at a plurality of power supply destinations, it is possible to sell the surplus power to, for example, the power grid 3b. The power grids 3a and 3b may be so-called retail electricity providers or general electricity providers. Also, the power grid 3a and the power grid 3b may be different electricity providers or the same electricity provider.

[0020] Also, in this application example, the system within the apartment building 1a and the management device 2 can communicate wirelessly via the LTE router 6. More specifically, this management device 2 may be a server device provided on the cloud by a management company that is the operating entity of the power supply system 1. However, the management device 2 only needs to be able to exchange information with the system within the apartment building 1a in the power supply system 1, and may be connected by wired communication, and does not necessarily have to be provided on the cloud.

[0021] Also, the private parts 12a, 12b, 12c... are, for example, the rooms of the occupants in the apartment building 1a. More specifically, the loads in the private parts 12a, 12b, 12c... are electrical appliances etc. (not shown) in each room of the apartment building 1a. The common part 13 is the common part in the apartment building 1a, and as the load of the common part 13, for example, corridor or entrance lighting 13a, or a specific load distribution board 13b etc. that can automatically supply power to electrical appliances connected in advance during a power outage etc. can be considered. Smart meters 11a, 11b, 11c..., 11d are provided in the private parts 12a, 12b, 12c... and the common part 13 respectively, and it is possible to measure the power consumed in the private parts 12a, 12b, 12c... and the common part 13.

[0022] In addition, a battery power conditioner 16 including a bidirectional DC / DC converter for raising and lowering the charge / discharge voltage and a DC / AC converter for converting the DC / AC of the voltage related to the charge / discharge of the storage battery is connected to the storage battery 14. The power output from the battery power conditioner 16 is measured by the smart meter 11e. On the other hand, a solar cell power conditioner 17 including a DC / DC converter for adjusting the power generation voltage of the solar cell 15, a control circuit for performing MPPT control by the hill climbing method, and a DC / AC converter for converting the DC / AC of the output voltage of the solar cell 15 is connected to the solar cell 15. The solar cell power conditioner 17 is also electrically connected to the battery power conditioner 16, and the power generated by the solar cell 15 can be directly charged to the storage battery 14. Note that a distributed power source in which the storage battery 14 and the solar cell 15 are integrated may be applied.

[0023] In this application example, when calculating the electricity charge to be billed to each room (hereinafter also referred to as an occupant) in the apartment house 1a, first, an operating profit is calculated based on the standard electricity charge (hereinafter also referred to as the standard electricity charge) that should be originally paid to the electric utility as a complex facility and the power purchase charge paid to the electric utility related to the system 3a. The amount obtained by subtracting the reduction charge registered as a fixed amount to the owner of the apartment house 1a from this operating profit becomes the discount source that should be finally reduced to the occupant as a discount amount. By registering the reduction charge as a fixed amount, it is possible to secure the profit of the owner of the complex facility.

[0024] 〔Example 1〕 Hereinafter, the power supply system according to Example 1 of the present invention will be described in detail with reference to the drawings. Note that the power supply system according to the present invention is not intended to be limited to the following configuration.

[0025] <System Configuration> Here, returning to the description of FIG. 1. In the power supply system 1 shown in FIG. 1, the battery power conditioner 16 and the solar cell power conditioner 17 are connected to the second distribution board 10 for distributed power sources. Thus, the second distribution board 10 is connected to the first distribution board 9 that distributes power to each exclusive part 12a, 12b, 12c ··· and the common part 13. The first distribution board 9 is connected to the power grids 3a, 3b via the parent smart meters 4a, 4b. Also, the first distribution board 9 is connected to each exclusive part 12a, 12b, 12c ··· and the common part 13 (the outlets thereof) via the smart meters 11a, 11b, 11c ··· 11d, 11e. Here, the first distribution board 9 and the second distribution board 10 constitute the power distribution device in this embodiment. Also, the smart meters 11a, 11b, 11c ··· 11d, 11e correspond to the power detection means in the present invention. Further, the parent smart meters 4a, 4b correspond to the grid power detection means in the present invention.

[0026] Thereby, the power generated by the solar cell 15 and the power discharged from the storage battery 14 can be supplied to each exclusive part 12a, 12b, 12c ··· and the common part 13. At this time, when the power consumption due to the loads in each exclusive part 12a, 12b, 12c ··· and the common part 13 is more than the supply power from the distributed power sources of the storage battery 14 and the solar cell 15, the shortage is supplemented by purchasing power from the power grid 3a. Also, when the power consumption due to the loads in each exclusive part 12a, 12b, 12c ··· and the common part 13 is less than the supply power from the distributed power sources of the storage battery 14 and the solar cell 15, the surplus can be sold to the power grid 3b as surplus power.

[0027] The information on the power consumption in the private parts 12a, 12b, 12c ···, and the shared part 13 measured by the smart meters 11a, 11b, 11c ··· 11d, 11e, and the input and output power of the battery power conditioner 16 measured by the smart meter 11e is provided to the VPP controller 5 as a control device via the gateway 8c and the hub 7. Also, the information on the output power of the solar power conditioner 17 is provided to the VPP controller 5 via the gateway 8a and the hub 7. Further, the power purchase amount from the grid 3a and the surplus power selling amount to the grid 3b measured by the parent smart meters 4a, 4b are also provided to the VPP controller 5. Moreover, information such as the state of the MPPT control in the solar power conditioner 17, the terminal current value and voltage value of the solar cell 14, and the power storage amount in the battery 14 is also provided to the VPP controller 5 via the gateways 8a and 8b and the hub 7. Here, the VPP controller 5 corresponds to the control device in the present invention.

[0028] Based on the power management policy by the owner of the apartment house 1a, the electricity trading market price, and the power consumption in each private part 12a, 12b, 12c ··· and the shared part 13, the power generation amount in the solar cell 15, the power storage amount in the battery 14, etc., the VPP controller 5 controls the input and output power of the battery power conditioner 16, the power purchase amount from the grid 3a, the surplus power selling amount to the grid 3b, etc.

[0029] Similarly, information on the power consumption in the exclusive parts 12a, 12b, 12c ···, and the shared part 13 measured by the smart meters 11a, 11b, 11c ··· 11d, 11e, and the input / output power from the battery power conditioner 16 is also provided to the management device 2 via the gateway 8c, the hub 7, and the LTE router 6. Similarly, the purchased power from the power grid 3a and the surplus sold power to the power grid 3b measured by the parent smart meters 4a, 4b are also provided to the management device 2. Further, information such as the state of the MPPT control in the solar power conditioner 17, the terminal current of the solar cell 15, the voltage value, etc., and information such as the stored power in the storage battery 14 are also provided to the management device 2 via the gateways 8a and 8b, the hub 7, and the LTE router 6. In the embodiment, the information on the purchased power from the power grid 3a and the surplus sold power to the power grid 3b may be obtained from the billing information from the power utility instead of being provided from the smart meter to the management device 2.

[0030] Figure 2 is a block diagram showing the flow of services and charges when implementing the power supply method in Embodiment 1. In Figure 2, the white arrows indicate the flow of services, and the hatched arrows indicate the flow of money. As a premise in the block diagram of Figure 2, the owner 23 who is the owner of the apartment building 1a entrusts the management company 21 which is the operating entity of the management device 2 in Figure 1 with a lump-sum power reception entrustment (power transaction control entrustment). That is, the owner 23 entrusts the management company 21 to manage the power supply for the residents 22 of the apartment building 1a and the shared part 13 and collect the electricity charges in a lump sum.

[0031] The management company 21 supplies power to each resident 22 using the power from the distributed power sources. Each resident 22 pays the management company 21 the electricity charge corresponding to the power consumed by themselves. And when the power supplied from the distributed power sources is less than the power consumed by the resident 22, the management company 21 procures the insufficient power from the power utility 20. In that case, the management company 21 pays the power purchase charge related to the power purchase to the power utility 20. That is, the management company 21 supplies power to each resident 22 by combining the power procured from the power utility 20 and the power from the distributed power sources.

[0032] Here, as described above, the resident 22 pays an electricity charge according to the amount of power supplied to the management company 21. The unit price of the electricity charge (yen / kWh) at this time is referred to as the first electricity unit price in this embodiment. And this first electricity unit price may be set lower than the unit price (yen / kWh) of the individual standard electricity charge that the resident 22 has conventionally paid to the electric power company 20. Also, the management company 21 pays a fixed amount to the owner 23 as self-consumption reduction from the total electricity charge paid by the resident 22 after deducting the power purchase charge for the power procured from the electric power company 20 and the operation fee of the power supply system 1. Here, the self-consumption reduction corresponds to the reduction charge in the present invention.

[0033] In this way, the resident 22 conventionally paid an individual standard electricity charge based on the unit price of the standard electricity charge of the electric power company 20 to the electric power company 20, but can enjoy the merit that a cheaper electricity charge can be paid based on the power supply by the distributed power source. Also, the owner 23 can enjoy the merit that automatic self-consumption reduction can be obtained by entrusting the management company 21 with centralized power reception. On the other hand, the management company 21 can obtain the operation fee of the power supply system 1 (that is, the fee related to the centralized power reception entrustment).

[0034] FIG. 3 is a diagram showing a method for calculating the discount amount for the resident 22 of the apartment building 1a in the first embodiment. When the management company 21 bills the resident 22 for the electricity charge, a predetermined discount amount is applied as a reduction measure for the resident 22. The discount amount for the resident 22 is calculated by the following formulas (1) and (2). Note that the unit of the charges in the formulas is all "yen". Also, FIG. 3 shows the charge composition for the entire apartment building 1a, not for each resident 22 of the apartment building 1a. [e]Discount source for resident 22 = [f]Standard electricity charge - [b]Total electricity charge for resident 22.................................................(1) [b]Total electricity charge for the residents 22 = [a]Owner reduction charge + [d]Operation fee for the management company 21 + [c]Power purchase charge ·····················(2) Here, the standard electricity charge is the charge that should be paid to the electricity utility 20 for the entire apartment building 1a based on the unit price of the standard electricity charge of the electricity utility 20. The owner reduction charge is the self-consumption reduction paid from the management company 21 to the owner 23 as shown in Fig. 2. Note that the amounts of the charges shown in Fig. 3 are merely examples and are not intended to be limited to those numerical values.

[0035] In Fig. 3, the hatched owner reduction charge is a fixed amount. By setting the owner reduction charge (20,000 yen in the example of Fig. 3) as a fixed amount, it is possible to ensure the self-consumption reduction for the owner 23 even when the power purchase charge (80,000 yen in the example of Fig. 3) increases due to the power generation amount of solar power generation or the electricity consumption amount. In this embodiment, the operation fee for the management company 21 (10,000 yen in the example of Fig. 3) is also a fixed amount.

[0036] In this embodiment, since the owner reduction charge is a fixed amount, when the power purchase charge increases, the discount source for the residents 22 decreases. The amount of the discount source is registered in a predetermined storage unit monthly. The discount amount for each resident 22 calculated from this discount source increases or decreases with respect to the value registered in advance monthly. For example, when the discount amount for each resident 22 falls below the registered value, it may be made up from the operation profit in the month when the discount amount exceeds the registered value. Details are shown in Fig. 4.

[0037] Also, the discount amount for each resident 22 may be set to be an equal value without difference for each of the exclusive parts 12a, 12b, 12c... in the apartment building 1a. Note that the discount amount for the residents 22 may be paid in full to a single account.

[0038] FIG. 4 is a block diagram showing a schematic configuration of the management device 2 in the first embodiment. As shown in FIG. 4, the management device 2 has a power purchase charge calculation unit 2a that calculates a power purchase charge to be paid to the electric utility 20 related to the power system 3a based on the power purchase amount from the power system 3a, or stores the claim amount of the power purchase charge from the electric utility 20. Further, it has a standard electricity charge calculation unit 2b that calculates a standard electricity charge imposed on the exclusive parts 12a, 12b, 12c... and the shared part 13 from the information on the power consumption in the exclusive parts 12a, 12b, 12c...

[0039] In addition, the management device 2 has an operating profit calculation unit 2c that calculates an operating profit based on the calculated value of the power purchase charge calculation unit 2a and the calculated value of the standard electricity charge calculation unit 2b. Here, the operating profit is a value obtained by subtracting the power purchase charge and the operation fee for the management company 21 from the standard electricity charge, that is, the total value of the discount fund for the residents 22 and the owner reduction fee. Further, the management device 2 has a required reduction amount storage unit 2d that pre-registers the owner reduction fee as a fixed amount.

[0040] In the management device 2, the reduction fee calculation unit 2e calculates the owner reduction fee based on the operating profit calculated by the operating profit calculation unit 2c and the set value of the required reduction amount storage unit 2d. As a calculation method, if the operating profit calculated by the operating profit calculation unit 2c is equal to or more than the set value of the required reduction amount storage unit 2d, the set value of the required reduction amount storage unit 2d is adopted as the owner reduction fee. Conversely, if the operating profit calculated by the operating profit calculation unit 2c is less than the set value of the required reduction amount storage unit 2d, the amount of the operating profit is adopted as the owner reduction fee.

[0041] For example, when the operating profit calculated by the operating profit calculation unit 2c is 50,000 yen and the set value of the required reduction amount storage unit 2d is 30,000 yen, 30,000 yen is calculated as the owner reduction fee, and the remaining 20,000 yen is calculated as the discount fund for the residents 22. On the other hand, when the operating profit calculated by the operating profit calculation unit 2c is 20,000 yen and the set value of the required reduction amount storage unit 2d is 30,000 yen, 20,000 yen is calculated as the owner reduction fee. In that case, the discount fund for the residents 22 is 0 yen, that is, no discount is given. Here, the discount amount for each of the residents 22 does not become a negative value, that is, there is no increase in the charge.

[0042] In the management device 2, as described above, the tenant discount cost calculation unit 2f has a function of calculating the cost basis for the discount for the tenant 22 for the current month based on the calculated value of the reduction fee calculation unit 2e. Specifically, it is calculated by subtracting the owner reduction fee from the operating profit calculated by the operating profit calculation unit 2c. Then, this discount cost basis is registered in the discount cost basis storage unit 2g. The discount cost basis storage unit 2g stores the history of the discount cost basis from the past and can be retrieved as data. Finally, the electricity fee calculation unit 2h calculates the electricity fee to be billed to each tenant 22, that is, the fee obtained by applying the discount amount for the tenant 22 to the individual standard electricity fee. Here, the individual standard electricity fee is, for example, the standard electricity fee for each tenant 22 calculated based on the standard electricity fee calculated by the standard electricity fee calculation unit 2b. A more specific example is the value obtained by dividing the standard electricity fee by the number of billing destinations (the number of tenants). Also, the discount amount for the tenant 22 is, for example, the discount cost basis stored in the discount cost basis storage unit 2g divided by the number of billing destinations. Note that a reference discount amount storage unit (not shown) stores in advance the reference discount amount that is the reference discount amount for each tenant 22. In a month when the discount amount for the tenant 22 is less than the reference discount amount, the difference between the discount amount for the tenant 22 and the reference discount amount may be compensated from the difference in such a month when the discount amount for the tenant 22 exceeds the reference discount amount. Since the hardware configuration of the management device 2 is the same as that of a general server device, the description is omitted here.

[0043] FIG. 5 is a flowchart showing the processing flow of the power supply method in the first embodiment. Hereinafter, the processing flow will be described with reference to FIG. 5. In this flowchart, first, each occupant 22 of the apartment house 1a uses electricity (S101). Then, in the power supply system 1 provided in the apartment house 1a, the electricity consumption of the occupant 22 is measured by the smart meters 11a, 11b, 11c, ··· (S102). Next, in the standard electricity charge calculation unit 2b of the management device 2 (cloud system), the standard electricity charge for all the occupants 22 of the apartment house 1a is calculated. More specifically, it is calculated by multiplying the total power consumption of all the occupants 22 of the apartment house 1a by the standard electricity charge unit price (yen / kWh). Furthermore, the individual standard electricity charge for each occupant 22 of the apartment house 1a is calculated (S103). Then, the discount amount for each occupant 22 for the previous month is reflected (S104), and a billing process is performed for each occupant 22 (S105). In response, each occupant 22 pays the electricity charge to which the discount amount is applied (S106).

[0044] Next, in the management device 2 (cloud system), revenue management is performed (S107). More specifically, it is confirmed whether the payment of the electricity bill for the current month from each resident 22 has been completed, and in the case of outstanding payments, a reminder process is performed. Also, information on the electricity purchase cost is acquired from the electricity purchase cost calculation unit 2a of the management device 2 (S108). More specifically, the amount billed from the electricity provider 20 stored in the electricity purchase cost calculation unit 2a may be referred to, or the electricity purchase cost may be calculated from the amount of electricity purchased from the electricity provider 20 measured by the parent smart meters 4a and 4b. Then, the set value of the system in which the operation fee for the management company 21 is stored is read, and from this operation fee for the management company 21, the standard electricity charge calculated in step S103, and the electricity purchase cost calculated in step S108, the operation profit, which is the total value of the discount capital and the owner reduction amount for the resident 22, is calculated (S109). Then, the set value of the required reduction amount storage unit 2d is read and compared with the operation profit calculated in step S109 to calculate the owner reduction fee. If the operation profit calculated in step S109 is equal to or greater than the set value of the required reduction amount storage unit 2d, the set value of the required reduction amount storage unit 2d is calculated as the owner reduction fee. Conversely, if the operation profit calculated in step S109 is less than the set value of the required reduction amount storage unit 2d, the operation profit calculated in step S109 is calculated as the owner reduction fee (S110). The remaining amount obtained by subtracting the owner reduction fee from the operation profit becomes the discount capital for the resident 22 and is registered in the discount capital storage unit 2g. Then, for example, by dividing the discount capital by the number of residents 22, the individual discount amount for each resident 22 in the following month is calculated (S111). Then, the payment process to the owner 23 is performed (S112), and the owner 23 receives the reduction fee related to self-consumption reduction (S113). Note that a receipt stating the details related to this flowchart may be output from the management device 2 (cloud system).

[0045] Note that in the following, in order to make it possible to compare the constituent elements of the present invention with the configuration of the embodiment, the constituent elements of the present invention are described with reference numerals in the drawings. <Invention 1> Power is supplied to a composite facility (1a) including a plurality of power supply destinations (12a - 12c), a distributed power source (14, 15) capable of supplying power to the plurality of power supply destinations, a power distribution device (9, 10) that distributes and supplies the power supplied from the system (3a) and / or the power supplied from the distributed power source to each of the plurality of power supply destinations, power detection means (11a - 11e) for detecting the power supplied to each of the plurality of power supply destinations via the power distribution device, system power detection means (4a, 4b) for detecting the power exchanged between the system and the power distribution device, a control device (5) for controlling the power related to charging / discharging or power generation of the distributed power source based on the power value detected by the power detection means, a power supply system (1) comprising a management device (2) that calculates the electricity charge to be billed to each of the plurality of power supply destinations and the reduction charge to the owner (23) of the composite facility based on the power values detected by the power detection means and the system power detection means, The management device has a required reduction amount storage unit (2d) in which the reduction charge to the owner is pre - registered as a fixed amount, and a reduction charge calculation unit (2e) that reads out the reduction charge to the owner of the composite facility from the required reduction amount storage unit. A power supply system characterized by this.

Explanation of Signs

[0046] 1: Power supply system 1a: Apartment building 2: Management device 3a, 3b: System 4a, 4b: Parent smart meter 5: VPP controller 6: LTE router 7: Hub 8a - 8c: Gateway 9: First distribution board 10: Second distribution board 11a - 11e: Smart meter 12a - 12c: Exclusive part 13: Common part 14: Storage battery 15: Solar cell 16: Storage battery power conditioner 17: Solar cell power conditioner

Claims

1. Supplying power to a complex facility including a plurality of power supply destinations, A distributed power source capable of supplying power to the plurality of power supply destinations, A power distribution device that distributes and supplies the power supplied from the grid and / or the power supplied from the distributed power source to each of the plurality of power supply destinations, Power detection means for detecting the power supplied to each of the plurality of power supply destinations via the power distribution device, Grid power detection means for detecting the power exchanged between the grid and the power distribution device, A control device for controlling the power related to the charge / discharge or power generation of the distributed power source based on the power value detected by the power detection means, A power supply system comprising a management device that calculates the electricity charge to be billed to each of the plurality of power supply destinations and the rebate amount for the owner of the complex facility based on the power values detected by the power detection means and the grid power detection means, The management device includes a required rebate amount storage unit in which the rebate amount for the owner is pre-registered as a fixed amount, and a rebate amount calculation unit that reads out the rebate amount for the owner of the complex facility from the required rebate amount storage unit, The management device, A standard electricity charge calculation unit that calculates a standard electricity charge based on the standard electricity unit price, which is the standard unit price of the power supplied from the grid, and the power value detected by the power detection means, A purchased electricity charge calculation unit that calculates a purchased electricity charge based on the purchased electricity unit price, which is the electricity unit price when purchasing electricity from the grid, and the power value detected by the grid power detection means, An operating profit calculation unit that calculates an operating profit by subtracting the purchased electricity charge calculated by the purchased electricity charge calculation unit from the standard electricity charge calculated by the standard electricity charge calculation unit, And further has, When the operating profit calculated by the operating profit calculation unit is less than the rebate amount read from the required rebate amount storage unit, the rebate amount calculation unit sets the amount of the operating profit as the value of the rebate amount, The management device, From the operating profit calculated by the operating profit calculation unit, the management device subtracts the rebate amount calculated by the rebate amount calculation unit and the management fee of the power supply system to calculate a discount fund to be used for the discount for the power supply destination, A discount fund calculation unit, A electricity charge calculation unit that calculates a discount amount for each of the plurality of power supply destinations from the discounted original cost calculated by the discounted original cost calculation unit, and subtracts the discount amount from the individual standard electricity charges for each of the plurality of power supply destinations calculated from the standard electricity charge to calculate the electricity charge. The power supply system further includes a discounted original cost storage unit that stores a history of the discounted original cost calculated by the discounted original cost calculation unit. The electricity charge calculation unit calculates the electricity charge for the current month by subtracting the discount amount for the previous month calculated from the discounted original cost for the previous month stored in the discounted original cost storage unit from the individual standard electricity charge for the current month.

2. Power is supplied to a composite facility including a plurality of power supply destinations. A distributed power source capable of supplying power to the plurality of power supply destinations. A power distribution device that distributes and supplies power supplied from the grid and / or power supplied from the distributed power source to each of the plurality of power supply destinations. Power detection means for detecting the power supplied to each of the plurality of power supply destinations via the power distribution device. Grid power detection means for detecting the power exchanged between the grid and the power distribution device. A control device that controls the power related to the charge / discharge or power generation of the distributed power source based on the power value detected by the power detection means. A power supply system comprising a management device that calculates the electricity charge to be billed to each of the plurality of power supply destinations and the reduction charge for the owner of the composite facility based on the power values detected by the power detection means and the grid power detection means. The management device includes a required reduction amount storage unit in which the reduction charge for the owner is registered in advance as a fixed amount, and a reduction charge calculation unit that reads out the reduction charge for the owner of the composite facility from the required reduction amount storage unit. A reference discount amount, which is a fixed discount amount for each of the power supply destinations, is registered in advance in the management device. When the discount amount in a given month is less than the reference discount amount, the difference between the discount amount and the reference discount amount in that month is compensated by the difference between the discount amount and the reference discount amount in the month when the discount amount exceeds the reference discount amount.

3. The power supply system according to claim 1 or 2, wherein the discount amount is an equal value for each of the plurality of power supply destinations.

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