JP2020198696A - Power supply system and power management method - Google Patents

Abstract

To provide a technique capable of returning benefits to both of an owner of a complex facility and a plurality of power supply destinations in the complex facility.SOLUTION: A power supply system has: a distributed power supply; a power distribution device distributing and supplying, to a plurality of power supply destinations, power supplied from a system and power supplied from the distributed power supply; power detection means for detecting power supplied to the plurality of power supply destinations through the power distribution device; system power detection means for detecting power transferred between the system and the power distribution device; a control device controlling power concerning charge/discharge or power generation of the distributed power supply based on a power value detected by the power detection means; and a management device calculating electricity charge charged to the plurality of power supply destinations and a reduction fee to an owner of a complex facility based on the power value detected by the power detection means and the system power detection means.SELECTED DRAWING: Figure 1

Description

The present invention relates to a power supply system that supplies power to a complex facility including a plurality of power supply destinations, and a power management method using the power supply system.

In recent years, a power supply system equipped with a distributed power source such as a storage battery or a solar cell and connected to a commercial power system has become widespread. Among them, as a power supply system that supplies power to a complex facility including multiple power supply destinations, a power supply system in a complex consumer facility that makes a low-voltage collective power reception contract with less power than the power required for the high-voltage collective power reception contract ( 90), the collective power receiving board (2) that receives power from the grid (80), the high-end meter device (1) that measures the power consumption by the complex consumer facility, and the collective power receiving board (2). Those having a distribution board (4) that supplies the received electric power to a plurality of consumer facilities in the complex consumer facility and a distributed power source (3) that can supply electric power to a plurality of consumer facilities. It is known.

This power supply system is for realizing a reduction in electricity charges when collectively receiving power. However, in the above system, the reduction of electricity charges has not always been able to provide both the owner of the complex and the plurality of power supply destinations in the complex with the benefit of private power generation by distributed generation.

JP-A-2017-17779 Japanese Unexamined Patent Publication No. 2013-143815

The present invention has been made in view of the above circumstances, and in a power supply system that supplies power to a complex facility including a plurality of power supply destinations and a power management method, the present invention is combined with the owner of the complex facility. The purpose is to provide technology that can provide the benefits of private power generation from distributed generation to both of the multiple power supply destinations in the facility.

In order to achieve the above object, the present invention adopts the following configuration. That is, it is a power supply system that supplies power to a complex facility including a plurality of power supply destinations.
A distributed power source that can supply power to the plurality of power supply destinations,
A distribution device that distributes and supplies electric power supplied from the grid and / or electric power supplied from the distributed power source to each of the plurality of power supply destinations.
A power detecting means for detecting power supplied to each of the plurality of power supply destinations via the distribution device, and
A system power detecting means for detecting power transmitted and received between the system and the distribution device, and
A control device that controls power related to charging / discharging or power generation of the distributed power source based on the power value detected by the power detecting means and the system power detecting means.
A management device that calculates an electricity charge charged to each of the plurality of electric power supply destinations and a return charge to the owner of the complex facility based on the electric power value detected by the electric power detecting means and the grid electric power detecting means. When,
It is a power supply system characterized by being equipped with.

According to this, the electricity charges charged to each of the multiple power supply destinations can be set at a low price, and the return charges can be returned to the owners of the complex, so that the private power generation (or power supply) by the distributed power source can be used. Benefits can be provided to both multiple power sources and complex owners.

Further, in the present invention, the management device calculates an electricity charge to be charged to the plurality of power supply destinations based on the amount of power supplied to each of the plurality of power supply destinations detected by the detection means. An electricity charge calculation unit may be provided. According to this, the electricity charge of the electric power supplied by the distributed power source can be automatically calculated.

Further, in the present invention, the electricity charge calculation unit has a first power unit price set to be equal to or lower than a power unit price set for power directly supplied from the grid to the plurality of power supply destinations, and the detection means. The electricity charge to be charged to the plurality of power supply destinations may be calculated based on the amount of power supplied to each of the plurality of power supply destinations detected by. According to this, the electricity of the power supplied by the distributed power source is used by using the first power unit price set to be equal to or lower than the unit price of the power determined for the power directly supplied from the grid to the plurality of power supply destinations. Since the charge is calculated, it is possible to more reliably set the electricity charge to be charged to each of the plurality of power supply destinations at a low price.

Further, in the present invention, the electricity charge calculation unit multiplies the amount of power supplied to each of the plurality of power supply destinations detected by the power detection means by the first power unit price to obtain the electricity charge. May be calculated. According to this, the electricity charge of the electric power supplied by the distributed power source is set to the first electric power unit price set to be equal to or less than the electric power unit price set for the electric power directly supplied from the grid to the plurality of electric power supply destinations. Since it is calculated by multiplying the amount of electricity actually supplied to a plurality of power supply destinations, the electricity charge can be more reliably set to a low charge according to the amount of electricity supplied.

Further, in the present invention, the management device calculates the return charge based on the electricity charge, the power procurement charge calculated from the amount of power supplied from the grid and the power purchase unit price. A return charge calculation unit may be further provided. According to this, the return charge calculation unit of the management device calculates the return charge to the equipment owner based on the income from the electricity charges from multiple power supply destinations and the power procurement charge from the grid. Therefore, it is possible to calculate the return fee more accurately.

Further, in the present invention, the reduction charge calculation unit subtracts a predetermined management charge determined as a charge including the power procurement charge and the management cost by the management device from the total value of the electricity charges. As a result, the return fee may be calculated. According to this, it is possible to calculate the return fee more accurately with a simpler calculation.

Further, in the present invention, the power detecting means also detects the power transmitted and received between the distribution device and the distributed power source, and the distributed power source detected by the power detecting means. The first power unit price may be changed according to the amount of power supplied to the plurality of power supply destinations via the power distribution device. As a result, for example, the more power supplied from the distributed power source to a plurality of power supply destinations, the lower the first power unit price can be set. As a result, it is possible to generate an incentive to increase the ratio of the power supplied from the distributed power source at a plurality of power supply destinations.

Further, in the present invention, the distributed power source may include a storage battery or may not include the storage battery. Further, the distributed power source may include a solar cell. Further, a wind power generator, a power source related to a so-called V2H (Vehicle to Home), or the like may be included.

Further, the present invention is a power management method by a power supply system that supplies power to a complex facility including a plurality of power supply destinations.
A distributed power source that can supply power to the plurality of power supply destinations,
A distribution device that distributes and supplies electric power supplied from the grid and / or electric power supplied from the distributed power source to each of the plurality of power supply destinations.
A power detecting means for detecting power supplied to each of the plurality of power supply destinations via the distribution device, and
A system power detecting means for detecting power transmitted and received between the system and the distribution device, and
A control device that controls power related to charging / discharging or power generation of the distributed power source based on the power value detected by the power detecting means and the system power detecting means.
Using a power supply system equipped with
Based on the power detection means and the power value detected by the system power detection means, the electricity charge charged to each of the plurality of power supply destinations and the return charge to the owner of the complex facility are automatically calculated. And
The electric power management method by the electric power supply system may be characterized in that the electric power charge is charged to the plurality of electric power supply destinations and the return charge is returned to the owner of the complex facility.

Further, in the present invention, the electricity charge is detected by the first power unit price set to be equal to or lower than the power unit price set for the power directly supplied from the grid to the plurality of power supply destinations and the detection means. The above-mentioned electric power management method may be characterized in that it is calculated based on the amount of electric power supplied to each of the plurality of electric power supply destinations.

Further, in the present invention, the electricity charge is calculated by multiplying the amount of electric power supplied to each of the plurality of electric power supply destinations detected by the electric power detecting means by the first electric power unit price. The above-mentioned power management method may be used.

Further, the present invention is characterized in that the return charge is calculated based on the electricity charge, the power procurement charge calculated from the amount of power supplied from the grid and the power purchase unit price. , The above power management method may be used.

Further, in the present invention, the return charge is obtained by subtracting a predetermined management charge determined as a charge including the power procurement charge and the management cost by the management device from the total value of the electricity charge. The above-mentioned power management method, which is characterized in that it is calculated, may be used.

The present invention is also characterized in that the first power unit price is changed according to the amount of power supplied from the distributed power source to the plurality of power supply destinations via the distribution device. It may be the power management method of.

It should be noted that each of the above configurations and processes can be combined with each other to construct the present invention as long as there is no technical contradiction.

According to the present invention, in a power supply system for supplying power to a complex facility including a plurality of power supply destinations and a power management method, the owner of the complex facility including the plurality of power supply destinations and a plurality of power supply destinations. Both can be provided with the benefits of private power generation from distributed generation.

It is a block diagram which shows the schematic structure of the power supply system in the Example of this invention. It is a block diagram which shows the schematic structure of the management apparatus in the Example of this invention. It is a block diagram which shows the flow of service and charge at the time of carrying out the power supply method in the Example of this invention. It is a flowchart which shows the process flow of the power supply method in the Example of this invention. It is a table which shows the specification item in the Example of this invention. It is a figure which shows the example of the content of the specification slip in the Example of this invention.

<Application example>
Hereinafter, application examples of the present invention will be described with reference to the drawings. FIG. 1 shows a block diagram of a power supply system 1 to which the present invention is applicable. In FIG. 1, the solid line connecting each block indicates a power line, and the broken line connecting each block indicates a communication line (including wireless communication). The power supply system 1 according to this application example is premised on being applied to an apartment house 1a. In this case, the apartment house 1a is an example of a complex facility including a plurality of power supply destinations. Further, it is premised that a distributed power source such as a power source for a solar cell, a wind power generator, so-called V2H (Vehicle to Home), a storage battery, or the like is provided.

In FIG. 1, the power supply system 1 is electrically connected to the systems 3a and 3b. When the power supplied by the distributed power source is less than the power consumption of the plurality of power supply destinations and the power is insufficient, it is possible to purchase power from, for example, the system 3a. Further, when the power supplied by the distributed power source is larger than the power consumed by the plurality of power supply destinations, it is possible to sell the surplus power to, for example, the system 3b. The systems 3a and 3b may be a so-called retail electric power company or a general electric power company. Further, the system 3a and the system 3b may be different electric power companies or may be the same electric power company.

Further, the power supply system 1 has a management device 2 configured to be able to communicate with the system in the apartment house 1a outside the apartment house 1a. In this application example, the system in the apartment house 1a and the management device 2 are capable of wireless communication via the LTE router 6. More specifically, the management device 2 may be a server device provided on the cloud by a management company that is an operating entity of the power supply system 1. However, the management device 2 may be connected by wired communication as long as the power supply system 1 can exchange information with the system in the apartment house 1a, and is not necessarily provided on the cloud. It doesn't have to be the one.

Further, as the plurality of power supply destinations of the power supply system 1, the exclusive units 12a, 12b, 12c ... Are assumed. The exclusive portions 12a, 12b, 12c ... Are, for example, each room (hereinafter, also referred to as a resident) in the apartment house 1a. More specifically, the load in the exclusive portions 12a, 12b, 12c ... Is an electric product or the like (not shown) in each room of the apartment house 1a. Further, in the apartment house 1a, there is a common part 13 in addition to the exclusive parts 12a, 12b, 12c ... The common area 13 is a common area in the housing complex 1a, and the load of the common area 13 is to automatically supply electric power to, for example, lighting 13a of a corridor or an entrance, or an electric product connected in advance in the event of a power failure. A specific load distribution board 13b or the like that enables this can be considered. The exclusive portions 12a, 12b, 12c ... And the common portion 13 are provided with smart meters 11a, 11b, 11c ..., 11d, respectively, and the exclusive portions 12a, 12b, 12c ... And the common portion 13 are provided. It is possible to measure the power consumed in.

Further, the power supply system 1 is provided with a storage battery 14 and a solar cell 15 as distributed power sources. A storage battery power controller 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 electric power output from the storage battery power conditioner 16 is measured by the smart meter 11e. On the other hand, the solar cell 15 includes a DC / DC converter that adjusts the generated voltage of the solar cell 15, a control circuit for performing MPPT control by the mountain climbing method, and a DC / AC converter that converts the DC / AC of the output voltage of the solar cell 15. The solar cell power controller 17 including the above is connected. The solar cell power conditioner 17 is also electrically connected to the storage battery power conditioner 16, and the electric power generated by the solar cell 15 can be directly charged to the storage battery 14. In this embodiment, a distributed power source in which the storage battery 14 and the solar cell 15 are integrated may be used.

As described above, in the power supply system 1 applied to the housing complex 1a, the owner of the housing complex 1a (equipment owner 23) conventionally purchases power from the system 3a by supplying power by a distributed power source. The resident in the housing complex 1a did not directly obtain the profit, but only profited by reducing the amount of power (electric power procurement) or acquiring the power sale fee by selling surplus electricity.

On the other hand, in this application example, as shown in FIG. 3, the management company 21 combines the electric power procured from the electric power user and the electric power from the distributed power source to each resident 22 (that is, that is, at a low cost). Electric power is supplied to the exclusive units 12a, 12b ...) In FIG. 1, and each resident 22 collects an electricity charge that is less than or equal to the general electricity charge paid to the electric power company 20. Then, the management company 21 subtracts the electricity procurement fee and the management fee paid to the electric power company from the total amount of the electricity charges collected from each resident 22 to the equipment owner 23, which is a part of the difference. To reduce.

By doing so, the resident 22 and the equipment owner 23 can each enjoy the benefit of the power supply by the distributed power source.

<Example 1>
Hereinafter, examples of the present invention will be described in more detail with reference to the drawings.

Here, the description returns to FIG. In the power supply system 1 shown in FIG. 1, the storage battery power conditioner 16 and the solar cell power conditioner 17 are connected to a second distribution board 10 for a distributed power source. The second distribution board 10 is connected to the first distribution board 9 that distributes electric power to the dedicated portions 12a, 12b, 12c ... And the common portion 13. The first distribution board 9 is connected to the systems 3a and 3b via the parent smart meters 4a and 4b. Further, the first distribution board 9 is connected to the dedicated portions 12a, 12b, 12c ... And the common portion 13 (outlet) via the smart meters 11a, 11b, 11c ... 11d, 11e. There is. Here, the first distribution board 9 and the second distribution board 10 constitute a distribution device in this embodiment. The smart meters 11a, 11b, 11c ... 11d, 11e correspond to the power detecting means in this embodiment. The parent smart meters 4a and 4b correspond to the system power detection means in this embodiment.

As a result, the electric power generated by the solar cell 15 and the electric power discharged from the storage battery 14 can be supplied to the dedicated portions 12a, 12b, 12c ... And the common portion 13. At that time, if the power consumption due to the load in each of the exclusive units 12a, 12b, 12c ... And the common unit 13 is larger than the power supplied by the distributed power sources of the storage battery 14 and the solar cell 15, power is purchased from the system 3a. This will make up for the shortfall. Further, when the power consumption due to the load in each of the exclusive parts 12a, 12b, 12c ... And the common part 13 is less than the power supplied by the distributed power sources of the storage battery 14 and the solar cell 15, the surplus is surplus to the system 3b. It is possible to sell electricity.

The power consumption of the exclusive units 12a, 12b, 12c ... Measured by the smart meters 11a, 11b, 11c ... 11d, 11e, the common portion 13, and the input / output of the storage battery power controller 16 measured by the smart meters 11e. The power information is provided to the VPP controller 5 as a control device via the gateway 8c and the hub 7. Further, the information on the output power of the solar cell power conditioner 17 is provided to the VPP controller 5 via the gateway 8a and the hub 7. Further, the amount of power purchased from the system 3a measured by the parent smart meters 4a and 4b and the amount of surplus power sold to the system 3b are also provided to the VPP controller 5. Further, information such as the state of MPPT control in the solar cell power conditioner 17, terminal current value and voltage value of the solar cell 14, and information such as the amount of electricity stored in the storage battery 14 are also transmitted to the VPP controller 5 via the gateways 8a and 8b and the hub 7. Provided.

In the VPP controller 5, the power management policy by the equipment owner (owner), the power transaction market price, the power consumption in each of the exclusive parts 12a, 12b, 12c ... And the common part 13, the amount of power generated in the solar cell 15, and the storage battery The input / output power of the storage battery power controller 16, the amount of power purchased from the system 3a, the amount of surplus power sold to the system 3b, and the like are controlled based on the amount of electricity stored in 14.

Similarly, the information on the power consumption in the exclusive sections 12a, 12b, 12c ... And the common section 13 measured by the smart meters 11a, 11b, 11c ... 11d, 11e and the input / output power from the storage battery power conditioner 16 is , The gateway 8c, the hub 7, and the management device 2 are also provided via the LTE router 6. Similarly, the amount of power purchased from the system 3a and the amount of surplus power sold to the system 3b measured by the parent smart meters 4a and 4b are also provided to the management device 2. Further, information such as the state of MPPT control in the solar cell power conditioner 17, terminal current and voltage value of the solar cell 15, and information such as the amount of electricity stored in the storage battery 14 are also transmitted via the gateways 8a and 8b, the hub 7, and the LTE router 6. It is provided to the management device 2. In the embodiment, the information on the amount of power purchased from the system 3a and the amount of surplus power sold to the system 3b is not provided from the smart meter to the management device 2, but is acquired from the billing information from the electric power company. It may be.

FIG. 2 shows a block diagram showing details of the functions of the management device 2. As shown in FIG. 2, in the management device 2, the electricity charges charged to the exclusive units 12a, 12b, 12c ... From the information on the power consumption in the exclusive units 12a, 12b, 12c ... It has an electricity charge calculation unit 2a for calculating. Further, the management company, which is the operating entity of the management device 2, has a return charge calculation unit 2b for calculating the return charge to be returned to the equipment owner. Further, based on the amount of power purchased from the grid 3a, the power purchase charge calculation unit 2c that calculates the power purchase charge to be paid to the electric power company related to the grid 3a or stores the billed amount of the power purchase charge from the electric power company is used. You may have it. Since the hardware configuration of the management device 2 is the same as that of a general server device, the description thereof is omitted here.

FIG. 3 is a block diagram showing an operation mode of the power supply system 1 according to the present invention. In the figure, the white arrows indicate the flow of services, and the hatched arrows indicate the flow of gold. First, the flow of services will be described. As a premise in the block diagram of FIG. 3, the equipment owner 23, who is the owner of the apartment house 1a, entrusts the management company 21, which is the operating entity of the management device 2 in FIG. 1, with a collective power reception consignment (electric power transaction control consignment). To do. That is, the equipment owner 23 collectively requests the management company 21 to manage the power supply and collect the electricity charges for the resident 22 and the common area of the apartment house 1a.

The management company 21 supplies electric power to each resident 22 by using electric power generated by a distributed power source. Each resident 22 pays the management company 21 an electricity charge according to the electric power consumed by the resident. Then, when the electric power supplied from the distributed power source is less than the electric power consumed by the resident 22, the management company 21 procures the insufficient electric power from the electric power company 20. In that case, the management company 21 pays the electric power company 20 a power purchase fee related to the power purchase. That is, the management company 21 supplies electric power to each resident 22 by combining the electric power procured from the electric power company and the electric power generated by the distributed power source.

Here, as described above, the resident 22 pays the management company 21 an electricity charge according to the amount of power supply, and the electricity charge unit price (yen / kWh) at that time is the first in this embodiment. It corresponds to the unit price of electricity. The first electric power unit price is freely determined by the management company 21, but may be lower than the unit price (yen / kWh) of the general electricity charge previously paid by the resident 22 to the electric power company 20. In addition, the management company 21 gives the equipment owner 23 a power purchase fee for the power procured from the electric power company 20 from the total electricity charges paid by the resident 22 (total electricity charges) as a return for self-consumption. And the amount after deducting the operation fee of the power supply system 1 including the operation cost of the management device 2 is paid. This management fee corresponds to the management fee in this embodiment.

As a result, the resident 22 has conventionally paid the electricity rate based on the unit price of the general electricity rate of the electricity company 20 to the electricity company 20, but pays a cheaper electricity rate based on the power supply by the distributed power source. You can enjoy the merit of doing it. In addition, the equipment owner 23 can enjoy the merit that the self-consumption return can be automatically obtained by entrusting the management company 21 to receive power collectively. On the other hand, the management company 21 can obtain an operation fee for the power supply system 1 (that is, a fee for collective power reception consignment).

FIG. 4 is a flowchart illustrating the processing steps of the power management method using the power supply system 1 in this embodiment while clearly indicating the main body of each processing step. Hereinafter, the processing flow will be described with reference to FIG. In this flowchart, first, each resident 22 of the apartment house 1a uses electricity (S101). Then, the power consumption of the resident 22 is measured in the power supply system 1 provided in the apartment house 1a (S102). Then, the electricity charge calculation unit 2a of the management device 2 (cloud system) calculates the electricity charge of each resident 22 (S103). More specifically, it is calculated by multiplying the power consumption of each resident 22 by the unit price of electricity (yen / kWh). Then, a billing process is performed for each resident 22 (S104). On the other hand, each resident 22 pays an electricity charge (S105).

Next, income management is performed in the management device 2 (cloud system) (S106). More specifically, it is confirmed whether or not the payment of electricity charges for the corresponding month from each resident 22 has been completed, and in the case of receivables, a reminder process is performed. In addition, information on the power purchase charge is acquired from the power purchase charge calculation unit 2c of the management device 2 (S107). More specifically, the invoice amount from the electric power company 20 stored in the power purchase charge calculation unit 2c may be referred to, or the power purchase charge is calculated from the amount of power purchased from the electric power company 20. You may. Then, the amount of return to the equipment owner 23 is calculated from the income amount calculated in step S106 and the power purchase charge calculated in step S107 (S108). Then, the payment process to the equipment owner 23 is performed (S109). Then, the equipment owner 23 receives the fee related to the return of self-consumption (S110).

FIG. 5 is an example of a detailed list as a base when the management company 21 prepares a statement to be submitted to the equipment owner 23. Here, the hatched items are the items specified in the specification to the equipment owner 23. First, as the items to be specified in the statement to the equipment owner 23, contract information (name, property name, contract No., etc.), total electricity charges (yen), operating profit / return amount (yen), return rate ( %). Here, the total electricity charge (yen) is the total amount of electricity charges charged to the apartment house 1a. The investment profit / return amount (yen) is the return amount to the equipment owner 23. The return rate (%) is the value obtained by dividing the return amount (yen) by the total electricity rate (yen). For the total electricity rate (yen), investment profit / return amount (yen), and return rate (%), a graph of monthly changes may be posted as detailed information.

In addition to the above, the information described in the detailed list includes electricity procurement price (yen), management fee (yen), total property electricity usage (kWh), total electricity procurement amount (kWh), and PV power generation amount (kWh). And so on. Here, the electric power procurement price (yen) is the purchase price, that is, the amount of electric power procured from the electric power company 20. The management fee (yen) is the running cost of the management company 21, that is, the fee of the management company 21. The total electricity consumption of the property (kWh) is the total value of the electricity consumption in the apartment house 1a. The total amount of electric power procured (kWh) is the total value of the electric power purchased in the apartment house 1a. The PV power generation amount (kWh) is the power generation amount in the solar cell 15.
In addition, as the information described in the detailed list, the self-consumption amount (kWh), the self-consumption rate (%), the self-consumption return calculation formula, the environmental value, etc. can be considered. Private consumption (kWh) is the amount obtained by subtracting the total amount of electricity procured from the total amount of electricity used in the property. The self-consumption rate (%) is a value obtained by dividing the self-consumption amount (kWh) by the PV power generation amount (kWh). The self-consumption return calculation formula is a calculation formula for the self-consumption unit price, the self-consumption return rate, and the like. The environmental value is the environmental value of self-consumption, for example, the amount of CO2 reduction.

Further, FIG. 6 shows an example of the items described in the specification for the equipment owner 23. This shows the operation results for a predetermined period, for example, half a year. In the example shown in FIG. 6, the total electricity charge (yen), the self-consumption return amount (yen), the self-consumption return rate (%), and the CO2 reduction amount are described. Then, as more detailed information, the description of the monthly return amount (yen) and the return rate (%) is displayed as a graph.

Here, the return amount (yen) and the return rate (%) are calculated by the following formulas.

Return amount (yen) = Total electricity charges (yen) -Electricity procurement charges (yen) -Management fees (yen) ... (1)

Return rate (%) = Return amount (yen) / Total electricity charges (yen) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ (2)

Further, the management fee (yen) may be calculated by the following formula, for example.

Management fee (yen) = basic fee (yen) +
(Total electricity charges (yen) -Electricity procurement charges (yen)) x Management company margin rate (%) ... (3)
Here, the basic charge is set for each apartment house 1a and is a value mainly depending on the number of units and the area.

In this embodiment, it is desirable to reduce the amount of electricity procured from the grid, increase the self-consumption rate (%), and reduce the electricity rate. For this purpose, the following measures can be considered. (1) Charge with cheap midnight electricity to reduce the amount of electricity purchased during the day.
By increasing the charging rate of the storage battery 14 as much as possible by using inexpensive midnight power, the power from the distributed power source is compared with the power consumption in the exclusive parts 12a, 12b, 12c ..., The common part 13. It is possible to prevent a shortage of supply.
(2) Reduce the procured power charge by combining the charging of the storage battery by solar power generation and the nighttime charging power.
When the generated power of the solar cell 15 becomes surplus, the storage battery 14 is charged as much as possible, and the charging rate of the storage battery 14 is increased as much as possible.
(3) Peak cut of electricity sold by solar power generation, demand forecasting and storage battery control.
Based on the date, day, sunrise time, sunset time, temperature, humidity, and other data, and the weather forecast obtained from the server, the exclusive units 12a, 12b, 12c ... ·, Predict the power consumption in the common area 13. The charge rate of the storage battery 14 is controlled so as to minimize the shortage of the power supplied by the distributed power source with respect to the predicted power consumption, and the maximum value of the purchased power is reduced to cut the peak. As a result, the maximum power consumption in the basic contract with the electric power company 20 is set low, and the basic charge paid to the electric power company 20 is reduced.

Further, in this embodiment, it is desirable to increase the amount of self-power consumption. For this purpose, the following measures can be considered.
(1) Low power consumption by using the control of home appliances For example, by using the drive control of the air conditioner in the common part 13 and the low power consumption hot water supply system using the natural refrigerant heat pump water heater, the exclusive parts 12a and 12b, 12c ..., The power consumption in the common portion 13 is suppressed.
(2) Increase the amount of self-power consumption by combining solar power generation, wind power generators, power sources related to so-called V2H (Vehicle to Home), storage batteries, etc. In addition to the above, when the generated power of the solar cells 15 etc. becomes surplus The storage battery 14 is charged as much as possible, and the charging rate of the storage battery 14 is increased as much as possible. Profitability is improved by reducing the sale of electricity to the grid 3b and increasing the amount of private power consumption.

Further, in this embodiment, it is desirable to prevent a decrease in self-power consumption. For this purpose, the following measures can be considered.
(1) Failure detection / prediction by remote monitoring system The management company 21 detects a failure in the power supply system 1 by the remote monitoring system. Alternatively, a failure is predicted from changes in the detected values of the smart meters 11a, 11b, 11c ... 11d, 11e. This prevents the power supply from the distributed power source from being reduced and the self-consumption power from being reduced.

Further, in this embodiment, it is important to reduce the basic contract fee with the electric power company 20. For this purpose, the following measures can be considered.
(1) Peak cut by solar power generation, demand forecast and storage battery control.
Based on the date, day, sunrise time, sunset time, temperature, humidity, and other data, and the weather forecast obtained from the server, the exclusive units 12a, 12b, 12c ... ·, Predict the power consumption in the common area 13. By controlling the charge rate of the storage battery 14 so as to minimize the shortage of the generated power generated by the distributed power source with respect to the predicted power consumption, the maximum value of the purchased power is reduced and the peak is cut. As a result, the maximum power consumption in the basic contract with the electric power company is set low, and the basic charge is reduced.
(2) The contracted capacity can be flexibly changed by changing the settings of the smart meters 11a, 11b, 11c ... 11d, 11e that change the capacity of the smart meter depending on the time. Therefore, the demand for electric power is predicted, the amount of electric power to be procured is predicted, and the capacities of the smart meters 11a, 11b, 11c ... 11d, and 11e are changed depending on the time. As a result, it is possible to always make a contract with the electric power company 20 with the minimum required capacity, and it is possible to reduce the basic charge.

Further, in this embodiment, the following can be considered as the points for devising the profit sharing method for increasing the amount of self-consumption.
(1) Change the discount rate of electricity charges according to the amount of self-consumption The discount rate of the billed amount of electricity charges for the exclusive departments (residents) 12a, 12b, 12c ... Make a contract. This will educate residents about curbing power usage during peak power hours.
(2) Display the amount and rate of self-consumption to encourage self-consumption.
In addition, when contacting the resident 22 about the electricity rate and the amount of electricity used, the self-consumption amount / rate is displayed. As a result, the resident 22 is enlightened to curb the use of electric power during peak electric power.
(3) Point reduction The operation will be such that the resident 22 can earn more points as the amount of self-consumption increases. Then, by discounting points according to the amount of accumulated points and returning points such as receiving prizes, we will enlighten the suppression of power usage during peak power hours.

In addition, the following variations can be considered for the operation of the power supply system 1.
(1) Extend the life of the equipment.
A plurality of storage batteries 14 are used. As a result, the number of charge / discharge cycles and the charge / discharge rate of each storage battery 14 are reduced.
(2) Detects the cutoff information of the parent smart meters 4a and 4b and the smart meters 11a, 11b, ... 11e to determine the faulty part (overcurrent, leakage) (3) In the event of a power failure, the smart meters 11a, 11b, ... -The capacity of 11e is automatically changed, and each resident 22 uses an independent power supply.
(4) The schedule information of the resident 22 is acquired, the demand is forecasted from the information, and the control for improving the self-consumption is performed.
(5) A device failure or a change in the resident 22 is estimated from an abnormal change (discontinuous change) in power consumption.

In the above embodiment, the apartment house 1a is illustrated as a complex facility having a plurality of power supply destinations, but the complex facility to which the present invention is applied is not limited to the apartment house. For example, common offices, industrial parks, etc. are also covered. Further, in the above embodiment, a solar cell is exemplified as an example of the distributed power source, but the distributed power source to which the present invention is applied is not limited to the solar cell, and is not limited to the solar cell, but is a wind power generation device, a geothermal power generation device, and a biomass power generation device. Other power sources such as are also included.

In addition, in order to make it possible to compare the constituent requirements of the present invention with the configurations of the examples, the constituent requirements of the present invention are described below with reference numerals in the drawings.
<Invention 1>
A power supply system (1) that supplies power to a complex facility (1b) including a plurality of power supply destinations (12a, 12b ...).
Distributed power sources (14, 15) capable of supplying power to the plurality of power supply destinations (12a, 12b ...), And
The amount of power supplied from the system (3a) and / or the power supplied from the distributed power sources (14, 15) distributed to each of the plurality of power supply destinations (12a, 12b ...). Electric devices (9, 10) and
With the power detecting means (11a, 11b, ... 11d) that detects the power supplied to each of the plurality of power supply destinations (12a, 12b ...) Through the distribution device (9, 10). ,
System power detecting means (4a, 4b) for detecting power transferred between the system (3a, 3b) and the distribution device (9, 10), and
With the control device (5) that controls the power related to charging / discharging or power generation of the distributed power sources (14, 15) based on the power value detected by the power detecting means (11a, 11b, ... 11d). ,
Based on the power values detected by the power detecting means (11a, 11b, ... 11e) and the system power detecting means (4a, 4b), the plurality of power supply destinations (12a, 12b ...) A management device (2) that calculates the electricity charge charged to each and the return charge to the owner of the complex facility (1b), and
A power supply system characterized by being equipped with.
<Invention 2>
It is a power management method by a power supply system (1) that supplies power to a complex facility (1b) including a plurality of power supply destinations (12a, 12b ...).
Distributed power sources (14, 15) capable of supplying power to the plurality of power supply destinations (12a, 12b ...), And
The amount of power supplied from the system (3a) and / or the power supplied from the distributed power sources (14, 15) distributed to each of the plurality of power supply destinations (12a, 12b ...). Electric devices (9, 10) and
With the power detecting means (11a, 11b, ... 11d) that detects the power supplied to each of the plurality of power supply destinations (12a, 12b ...) Through the distribution device (9, 10). ,
System power detecting means (4a, 4b) for detecting power transferred between the system (3a, 3b) and the distribution device (9, 10), and
For charging / discharging or generating power of the distributed power sources (14, 15) based on the power values detected by the power detecting means (11a, 11b, ... 11d) and the system power detecting means (4a, 4b). A control device (5) that controls the power, and
Using the power supply system (1) equipped with
Based on the power values detected by the power detecting means (11a, 11b, ... 11e) and the system power detecting means (4a, 4b), the plurality of power supply destinations (12a, 12b ...) The electricity charge charged to each and the return charge to the owner of the complex facility (1b) are automatically calculated.
A power supply system (1), characterized in that the electricity charges are imposed on the plurality of power supply destinations (12a, 12b ...) And the return charges are returned to the owner of the complex facility (1b). ) Power management method.

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

Claims (15)

A power supply system that supplies power to a complex facility that includes multiple power supply destinations.
A distributed power source that can supply power to the plurality of power supply destinations,
A distribution device that distributes and supplies electric power supplied from the grid and / or electric power supplied from the distributed power source to each of the plurality of power supply destinations.
A power detecting means for detecting power supplied to each of the plurality of power supply destinations via the distribution device, and
A system power detecting means for detecting power transmitted and received between the system and the distribution device, and
A control device that controls power related to charging / discharging or power generation of the distributed power source based on the power value detected by the power detecting means.
A management device that calculates an electricity charge charged to each of the plurality of electric power supply destinations and a return charge to the owner of the complex facility based on the electric power value detected by the electric power detecting means and the grid electric power detecting means. When,
A power supply system characterized by being equipped with. The management device
An electricity charge calculation unit that calculates an electricity charge to be charged to the plurality of electric power supply destinations based on the amount of electric power supplied to each of the plurality of electric power supply destinations detected by the detection means.
The power supply system according to claim 1, wherein the power supply system is provided. The electricity charge calculation unit includes a first power unit price set to be equal to or lower than a power unit price set for power directly supplied from the grid to the plurality of power supply destinations, and the plurality of powers detected by the detection means. The power supply system according to claim 2, wherein the electricity charges charged to the plurality of power supply destinations are calculated based on the amount of power supplied to each of the power supply destinations. The electricity charge calculation unit is characterized in that the electricity charge is calculated by multiplying the amount of power supplied to each of the plurality of power supply destinations detected by the power detection means by the first power unit price. The power supply system according to claim 3. The management device
A return charge calculation unit that calculates the return charge based on the electricity charge, the amount of power supplied from the grid, and the power procurement charge calculated from the power purchase unit price.
The power supply system according to any one of claims 2 to 4, further comprising. The return charge calculation unit calculates the return charge by subtracting a predetermined management charge determined as a charge including the power procurement charge and the management cost by the management device from the total value of the electricity charge. The power supply system according to claim 5, wherein the power supply system is calculated. The power detecting means also detects the power transmitted and received between the distribution device and the distributed power source.
The first power unit price is changed according to the amount of power supplied from the distributed power source to the plurality of power supply destinations via the distribution device, which is detected by the power detection means. The power supply system according to any one of claims 3 to 6. The power supply system according to any one of claims 1 to 7, wherein the distributed power source includes a storage battery. The power supply system according to any one of claims 1 to 8, wherein the distributed power source includes a solar cell. It is a power management method using a power supply system that supplies power to a complex facility that includes multiple power supply destinations.
A distributed power source that can supply power to the plurality of power supply destinations,
A distribution device that distributes and supplies electric power supplied from the grid and / or electric power supplied from the distributed power source to each of the plurality of power supply destinations.
A power detecting means for detecting power supplied to each of the plurality of power supply destinations via the distribution device, and
A system power detecting means for detecting power transmitted and received between the system and the distribution device, and
A control device that controls power related to charging / discharging or power generation of the distributed power source based on the power value detected by the power detecting means.
Using a power supply system equipped with
Based on the power detection means and the power value detected by the system power detection means, the electricity charge charged to each of the plurality of power supply destinations and the return charge to the owner of the complex facility are automatically calculated. And
A power management method by a power supply system, which comprises imposing the electricity charge on a plurality of power supply destinations and returning the return charge to the owner of the complex facility. The electricity bill is
The first power unit price set to be equal to or lower than the power unit price set for the power directly supplied from the grid to the plurality of power supply destinations, and the power supply to each of the plurality of power supply destinations detected by the detection means. The electric power management method according to claim 10, wherein the electric power is calculated based on the amount of electric power generated. The electricity bill is
The eleventh aspect of claim 11, wherein the electricity charge is calculated by multiplying the amount of electric power supplied to each of the plurality of electric power supply destinations detected by the electric power detecting means by the first electric power unit price. Power management method. The return fee is
Any one of claims 10 to 12, characterized in that it is calculated based on the electricity charge, the power procurement charge calculated from the amount of power supplied from the grid, and the power purchase unit price. The power management method described in. The return fee is
The claim is characterized in that it is calculated by subtracting a predetermined management fee determined as a fee including the power procurement fee and the cost of management by the management device from the total value of the electricity fee. 13. The power management method according to 13. Any of claims 11 to 14, characterized in that the first power unit price is changed according to the amount of power supplied from the distributed power source to the plurality of power supply destinations via the distribution device. The power management method described in item 1.

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