JP7259558B2 - Power supply system and power management method - Google Patents

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.

2. Description of the Related Art In recent years, power supply systems that include distributed power sources such as storage batteries and solar cells and are interconnected with a commercial power system have become widespread. Among them, as a power supply system that supplies power to a complex facility that includes multiple power supply destinations, a power supply system at a complex consumer facility ( 90), comprising a collective power receiving panel (2) that receives power supply from the system (80), a host meter device (1) that measures the power consumption by the complex consumer facility, and a collective power receiving panel (2) A distribution board (4) that supplies received power to a plurality of consumer facilities in a complex consumer facility, and a distributed power supply (3) capable of supplying power to the plurality of consumer facilities It is publicly known.

This power supply system is intended to realize a reduction in electricity charges when performing bulk power reception. However, in the above system, the reduction in electricity bills does not necessarily provide both the owner of the complex and the multiple power supply destinations of the complex with the benefits of private power generation from distributed power sources.

JP 2017-17779 A JP 2013-143815 A

The present invention has been made in view of the above circumstances, and provides a power supply system for supplying power to a complex facility including a plurality of power supply destinations, and a power management method. It is an object of the present invention to provide a technology capable of providing benefits of in-house power generation by a distributed power source to both of multiple power supply destinations in a facility.

In order to achieve the above objects, the present invention employs the following configurations. That is, a power supply system that supplies power to a complex facility that includes 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 a system and/or power supplied from the distributed power supply to each of the plurality of power supply destinations;
power detection means for detecting power supplied to each of the plurality of power supply destinations via the power distribution device;
grid power detection means for detecting power exchanged between the grid and the power distribution device;
a control device for controlling power related to charging/discharging or power generation of the distributed power supply based on the power values detected by the power detection means and the grid power detection means;
A management device that calculates an electricity charge to be charged to each of the plurality of power supply destinations and a return charge to the owner of the complex facility based on the power values detected by the power detection means and the grid power detection means. and,
A power supply system comprising:

According to this, it is possible to set the electricity rate to be charged to each of a plurality of power supply destinations at a low price, and it is possible to return the return charge to the owner of the complex facility. Benefits can be extended to both multiple power destinations and complex owners.

Further, in the present invention, the management device calculates electricity rates 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. You may make it provide the electricity bill calculation part which carries out. According to this, it is possible to automatically calculate the electricity rate of the power supplied by the distributed power source.

Further, in the present invention, the electricity rate calculation unit includes a first power unit price set to be equal to or less 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 rate 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 and. According to this, by using the first power unit price set below the unit price of power determined for the power directly supplied from the grid to the plurality of power supply destinations, the electricity of the power supplied by the distributed power supply Since the charges are calculated, it is possible to more reliably set low electricity charges to be charged to each of the plurality of power supply destinations.

Further, in the present invention, the electricity rate calculation unit calculates the electricity rate 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. may be calculated. According to this, the electricity rate of the electricity supplied by the distributed power supply is set to the first electricity unit price set below the unit price of electricity set for the electricity directly supplied from the grid to the plurality of electricity supply destinations. , is calculated by multiplying the amount of power actually supplied to a plurality of power supply destinations, so that the electricity rate can be more reliably set at a low rate according to the amount of power supply.

Further, in the present invention, the management device calculates the return charge based on the electricity charge and a 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 facility owner based on the income from the electricity charges from the plurality of power supply destinations and the power procurement charge from the system. Therefore, it is possible to calculate the return fee with higher accuracy.

Further, in the present invention, the return charge calculation unit subtracts the power procurement charge and a predetermined management charge, which is set as a charge including the cost of management by the management device, from the total value of the electricity charges. Thus, the return charge may be calculated. According to this, it is possible to calculate the return charge with a simpler calculation and with a higher degree of accuracy.

Further, in the present invention, the power detection means also detects power exchanged between the power distribution device and the distributed power supply, and the power detected by the power detection means is detected by the distributed power supply. 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 the 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 proportion of power supplied from distributed power sources in a plurality of power supply destinations.

Moreover, in the present invention, the distributed power supply may include a storage battery or may not include a storage battery. Also, the distributed power source may include a solar cell. It may also include a wind power generator, a so-called V2H (Vehicle to Home) power supply, and the like.

The present invention also provides 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 capable of supplying power to the plurality of power supply destinations;
a power distribution device that distributes and supplies power supplied from a system and/or power supplied from the distributed power supply to each of the plurality of power supply destinations;
power detection means for detecting power supplied to each of the plurality of power supply destinations via the power distribution device;
grid power detection means for detecting power exchanged between the grid and the power distribution device;
a control device for controlling power related to charging/discharging or power generation of the distributed power supply based on the power values detected by the power detection means and the grid power detection means;
using a power supply system comprising
Based on the power values detected by the power detection means and the grid power detection means, an electricity rate to be charged to each of the plurality of power supply destinations and a return rate to the owner of the complex facility are automatically calculated. death,
The power management method by the power supply system may include charging the electricity charges to the plurality of power supply destinations and returning the return charges to the owner of the complex facility.

Further, in the present invention, the electricity rate is detected by a first electricity unit price set to be equal to or less than a unit price of electricity set for electricity directly supplied from a grid to the plurality of electricity supply destinations, and by the detecting means. and the amount of power supplied to each of the plurality of power supply destinations.

In the present invention, the electricity rate 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 above power management method may be characterized by:

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

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

Further, according to the present invention, the first power unit price is changed according to the amount of power supplied from the distributed power supply to the plurality of power supply destinations via the power distribution device. power management method.

It should be noted that each of the above configurations and processes can be combined with each other to form 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, an owner of a complex facility including a plurality of power supply destinations and a plurality of power supply destinations Both can be provided with the benefits of self-generation from distributed generation.

1 is a block diagram showing a schematic configuration of a power supply system in an embodiment of the invention; FIG. It is a block diagram showing a schematic configuration of a management device in an embodiment of the present invention. FIG. 4 is a block diagram showing the flow of services and charges when implementing the power supply method in the embodiment of the present invention; 4 is a flow chart showing the flow of processing of the power supply method in the embodiment of the present invention; It is a table showing detailed items in the embodiment of the present invention. It is a figure which shows the example of the content of the statement 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 invention is applicable. In FIG. 1, solid lines connecting blocks indicate power lines, and dashed lines connecting blocks indicate communication lines (including wireless communication). It is assumed that the power supply system 1 according to this application example is applied to a housing complex 1a. In this case, the collective housing 1a is an example of a complex facility including multiple power supply destinations. In addition, it is premised that a distributed power source such as a solar cell, a wind power generator, a power source related to so-called V2H (Vehicle to Home), a storage battery, or the like is provided.

In FIG. 1, a power supply system 1 is electrically connected to systems 3a and 3b. When the power supplied by the distributed power sources is less than the power consumed by the plurality of power supply destinations and the power is insufficient, power can be purchased from the grid 3a, for example. Moreover, when the power supplied by the distributed power sources is greater than the power consumed by the plurality of power supply destinations, it is possible to sell surplus power to the system 3b, for example. The systems 3a and 3b may be a so-called retail electricity supplier or a general electricity supplier. Also, the system 3a and the system 3b may be different electric companies or may be the same electric company.

Further, the power supply system 1 has a management device 2 outside the collective housing 1a, which is configured to be able to communicate with a system inside the collective housing 1a. In this application example, wireless communication via the LTE router 6 is possible between the system in the housing complex 1 a and the management device 2 . More specifically, the management device 2 may be a server device provided on the cloud by a management company that operates the power supply system 1 . However, in the power supply system 1, the management device 2 only needs to be able to exchange information with the system in the collective housing 1a, and may be connected by wire communication, and is not necessarily provided on the cloud. It doesn't have to be anything else.

Further, as the plurality of power supply destinations of the power supply system 1, exclusive units 12a, 12b, 12c, . . . are assumed. These exclusive areas 12a, 12b, 12c, . More specifically, the loads in the exclusive units 12a, 12b, 12c, . In addition to the exclusive areas 12a, 12b, 12c, . The common area 13 is a common area in the collective housing 1a, and the load of the common area 13 includes, for example, the lighting 13a in the corridor and the entrance, and the automatic power supply to electric appliances connected in advance in the event of a power failure. A specific load distribution board 13b or the like is conceivable. Smart meters 11a, 11b, 11c, . It is possible to measure the power consumed in

The power supply system 1 also includes a storage battery 14 and a solar battery 15 as distributed power sources. The storage battery 14 is connected to a storage battery power conditioner 16 including a bi-directional DC/DC converter for increasing/decreasing the charging/discharging voltage and a DC/AC converter for converting DC/AC of the voltage related to charging/discharging of the storage battery. The 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 for adjusting the voltage generated by the solar cell 15, a control circuit for performing MPPT control by the hill-climbing method, and a DC/AC converter for converting the output voltage of the solar cell 15 between DC and AC. A solar battery power conditioner 17 including is connected. The solar battery power conditioner 17 is also electrically connected to the storage battery power conditioner 16 so that the electric power generated by the solar battery 15 can be directly charged to the storage battery 14 . In addition, 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, conventionally, the owner (equipment owner 23) of the housing complex 1a purchases power from the system 3a ( Procurement of electric power) was merely obtained by reducing the amount of electric power procurement or by acquiring electric power sales charges by selling surplus electric power, and the residents in the collective housing 1a did not directly obtain the profits.

On the other hand, in this application example, as shown in FIG. 3, the management company 21 combines the power procured from the electric power user and the power from the distributed power supply at a low cost to each resident 22 (that is, Electric power is supplied to the exclusive units 12a, 12b, . . . ) in FIG. Then, the management company 21 provides the facility owner 23 with the sum of the electricity charges collected from each resident 22 minus the electricity procurement charge and the operating fee paid to the electric utility company, and a part of the difference. to reduce.

By doing so, the resident 22 and the facility owner 23 can each enjoy the benefits of the power supply from the distributed power supply.

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

Now, let us return to the description of FIG. In the power supply system 1 shown in FIG. 1, the storage battery inverter 16 and the solar battery inverter 17 are connected to the second distribution board 10 for distributed power supply. The second distribution board 10 is connected to a first distribution board 9 that distributes electric power to the exclusive sections 12a, 12b, 12c, . . . The first distribution board 9 is connected to the systems 3a and 3b via the parent smart meters 4a and 4b. In addition, the first distribution board 9 is connected to (outlets of) the exclusive sections 12a, 12b, 12c, ... and the common section 13 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, and 11e correspond to power detection means in this embodiment. The parent smart meters 4a and 4b correspond to grid power detection means in this embodiment.

Thus, the power generated by the solar cell 15 and the power discharged from the storage battery 14 can be supplied to each of the exclusive sections 12a, 12b, 12c, . . . At that time, if the power consumption by the load in each of the exclusive units 12a, 12b, 12c, . This makes up for the shortfall. When the power consumption by the load in each of the exclusive units 12a, 12b, 12c, . Electricity can be sold.

The power consumption of the private units 12a, 12b, 12c, . Power information is provided to VPP controller 5 as a control device via gateway 8 c and hub 7 . Information on the output power of the solar battery power conditioner 17 is provided to the VPP controller 5 via the gateway 8a and the hub 7. FIG. The VPP controller 5 is also provided with 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. Information such as the state of MPPT control in the solar battery power conditioner 17, terminal current value and voltage value of the solar battery 15, and information such as the amount of electricity stored in the storage battery 14 is also sent to the VPP controller 5 via the gateways 8a and 8b and the hub 7. provided.

In the VPP controller 5, the policy of power management by the facility owner (owner), the power trading market price, the power consumption in each of the exclusive sections 12a, 12b, 12c, . . . 14, the input/output power of the storage battery power conditioner 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.

Similarly, information on the power consumption of the private units 12a, 12b, 12c, . , the gateway 8 c , the hub 7 and the LTE router 6 to the management device 2 . 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. Furthermore, information such as the state of MPPT control in the solar battery power conditioner 17, terminal current and voltage value of the solar battery 15, and information such as the amount of electricity stored in the storage battery 14 are also sent via the gateways 8a and 8b, the hub 7, and the LTE router 6. Provided to the management device 2 . In the embodiment, information on the amount of power purchased from the grid 3a and the amount of surplus power sold to the grid 3b is not provided from the smart meter to the management device 2, but is acquired from billing information from the power company. can be

FIG. 2 shows a block diagram showing the details of the functions of the management device 2. As shown in FIG. As shown in FIG. 2, in the management device 2, electricity charges to be imposed on the exclusive units 12a, 12b, 12c, . It has an electricity rate calculation unit 2a that calculates . Further, the management company, which is the operating body of the management device 2, has a return charge calculation unit 2b that calculates the return charge to be returned to the facility owner. Further, a power purchase charge calculation unit 2c for calculating the power purchase charge to be paid to the electric power company related to the system 3a based on the power purchase amount from the system 3a or storing the billed amount of the power purchase charge from the electric power company. You may have Note that the hardware configuration of the management device 2 is the same as that of a general server device, so the description is omitted here.

FIG. 3 is a block diagram showing a form of operation of the power supply system 1 according to the present invention. In the figure, white arrows indicate the flow of services, and hatched arrows indicate the flow of money. First, the service flow will be explained. As a premise in the block diagram of FIG. 3, the equipment owner 23 who is the owner of the collective housing 1a entrusts the management company 21, which is the operating body of the management device 2 in FIG. do. That is, the equipment owner 23 requests the management company 21 to collectively manage the power supply and collect the electricity charges for the tenants 22 and the common areas of the housing complex 1a.

The management company 21 supplies power to each resident 22 using power from a distributed power source. Each resident 22 pays the management company 21 an electricity charge corresponding to the electricity he/she consumes. Then, when the power supplied from the distributed power supply is less than the power consumption of the resident 22, the management company 21 procures the shortage of power from the electric utility 20. FIG. In that case, the management company 21 pays the power purchase charge for the power purchase to the electric power supplier 20 . That is, the management company 21 supplies power to each resident 22 by combining the power procured from the electric power company and the power from the distributed power supply.

Here, as described above, the resident 22 pays the management company 21 an electricity fee corresponding to the amount of power supply. Equivalent to electricity unit price. The first 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 bill that the resident 22 has paid to the electric utility 20 in the past. In addition, the management company 21 provides the equipment owner 23 with the purchase price of the power procured from the electric power company 20 from the total electricity bill paid by the resident 22 (total electricity bill) as a return for self-consumption. and the amount after deducting the operation fee of the power supply system 1, which includes the operation cost of the management device 2. This management fee corresponds to the management fee in this embodiment.

As a result, the resident 22 has traditionally paid the electric utility 20 an electricity bill based on the unit price of the general electricity bill of the electric utility 20, but now pays a cheaper electric bill based on the power supply from the distributed power supply. You can enjoy the benefits of being able to do it. In addition, the equipment owner 23 can enjoy the merit of being able to automatically obtain a self-consumption return by consigning the management company 21 to collectively receive power. On the other hand, the management company 21 can obtain a management fee for the power supply system 1 (that is, a fee for entrusting bulk power reception).

FIG. 4 is a flow chart explaining the processing steps of the power management method using the power supply system 1 according to the present embodiment, clearly specifying the subject of each processing step. The flow of processing will be described below with reference to FIG. In this flowchart, first, each resident 22 of the housing complex 1a uses electricity (S101). Then, the power consumption of the resident 22 is measured in the power supply system 1 provided in the housing complex 1a (S102). Then, the electricity bill of each resident 22 is calculated in the electricity bill calculator 2a of the management device 2 (cloud system) (S103). More specifically, it is calculated by multiplying the power consumption of each resident 22 by the electricity rate unit price (yen/kWh). Then, billing processing is performed for each resident 22 (S104). On the other hand, each resident 22 pays the electricity bill (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 the electricity bill for the corresponding month from each resident 22 has been completed, and in the case of uncollected money, a demanding process is performed. Further, information on the power purchase charge is acquired from the power purchase charge calculator 2c of the management device 2 (S107). More specifically, the billed amount from the electric power company 20 stored in the electric power purchase charge calculation unit 2c may be referred to, or the electric power purchase charge is calculated from the amount of electric power purchased from the electric power company 20. may Then, the amount of return to the equipment owner 23 is calculated from the amount of income calculated in step S106 and the power purchase charge calculated in step S107 (S108). Then, payment processing to the facility owner 23 is performed (S109). Then, the equipment owner 23 receives the fee for the self-consumption return (S110).

FIG. 5 is an example of a list of specifications that is used as a basis for preparing specifications to be submitted to the facility owner 23 in the management company 21 . Here, the hatched items are the items specified in the specification to the equipment owner 23 . First, as items to be specified in the statement to the facility owner 23, contract information (name, property name, contract number, etc.), total electricity charge (yen), investment profit/return amount (yen), return rate ( %). Here, the total electricity bill (yen) is the total amount of electricity bill charged to the housing complex 1a. The investment profit/return amount (yen) is the return amount to the equipment owner 23 . The return rate (%) is a value obtained by dividing the return amount (yen) by the total electricity charge (yen). As for the total electricity bill (yen), the investment profit/return amount (yen), and the return rate (%), as detailed information, a graph showing monthly changes may be posted.

In addition to the above, the information listed in the itemized list includes the electricity procurement price (yen), management fee (yen), total property electricity usage (kWh), total electricity procurement (kWh), and PV power generation (kWh). etc. Here, the power procurement price (yen) is the power purchase amount, that is, the amount of power procured from the electric power company 20 . The management fee (yen) is the running cost of the management company 21, that is, the management company 21 fee. The property electricity consumption total (kWh) is the total electricity consumption in the collective housing 1a. The total power procurement amount (kWh) is the total value of power purchased in the collective housing 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 itemized list, self-consumption amount (kWh), self-consumption rate (%), self-consumption return calculation formula, environmental value, etc. can be considered. Self-consumption (kWh) is the amount obtained by subtracting the total power procurement amount from the total property power consumption. The self-consumption rate (%) is a value obtained by dividing the self-consumption (kWh) by the PV power generation amount (kWh). The self-consumption return calculation formula is a calculation formula such as a self-consumption return unit price and a self-consumption return rate. The environmental value is the environmental value of self-consumption, such as the amount of CO2 reduction.

Further, FIG. 6 shows an example of items to be described in the specification for the facility owner 23. In FIG. This indicates the operational results for a predetermined period, for example, half a year. In the example shown in FIG. 6, the total electricity bill (yen), the return amount for self-consumption (yen), the return rate for self-consumption (%), and the amount of CO2 reduction are described. As more detailed information, the monthly return amount (yen) and the return rate (%) are displayed as a graph.

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

Return amount (yen) = Total electricity cost (yen) - Electricity procurement fee (yen) - Management fee (yen) (1)

Refund rate (%) = Refund amount (yen) / Total electricity bill (yen) (2)

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

Management fee (yen) = Basic fee (yen) +
(Total electricity bill (yen) - Electricity procurement fee (yen)) x Management company margin rate (%) (3)
Here, the basic charge is a value that is set for each housing complex 1a and mainly depends on the number of units and area.

In this embodiment, it is desirable to reduce the amount of power procured from the grid and increase the self-consumption rate (%) to lower the electricity bill. For this reason, the following measures are conceivable. (1) Reduce the amount of electricity purchased during the daytime by charging with cheap late-night electricity.
By using inexpensive late-night power and increasing the charging rate of the storage battery 14 as much as possible, the power from the distributed power sources can be reduced with respect to the power consumption in the exclusive portions 12a, 12b, 12c, . . . It is possible to suppress the occurrence of supply shortages.
(2) Combining the charging of storage batteries by photovoltaic power generation with night-time charging power to reduce procurement power charges.
When the power generated by 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 electric power sold by photovoltaic power generation, demand forecasting and storage battery control.
Based on data such as date, day of the week, sunrise time, sunset time, temperature, humidity, and weather forecast acquired from the server, the exclusive units 12a, 12b, 12c, . . . , to predict the power consumption in the shared section 13; The charging rate of the storage battery 14 is controlled so as to minimize the shortage of the power supplied by the distributed power sources 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 to be paid to the electric power company 20 is reduced.

Also, in this embodiment, it is desirable to increase the self-consumption of power. For this purpose, the following measures can be considered.
(1) Reduction of power consumption using home appliance control 12c .
(2) Increase in-house power consumption by combining photovoltaic power generation, wind power generators, so-called V2H (Vehicle to Home) power sources, storage batteries, etc. In addition to the above, when the power generated by solar cells 15, etc. is surplus Then, 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 power sales to the system 3b and increasing self-consumption power.

Also, in the present embodiment, it is desirable to prevent a decrease in private power consumption. For this purpose, the following measures can be considered.
(1) Detection and Prediction of Failures by Remote Monitoring System In the management company 21, failures in the power supply system 1 are detected by the remote monitoring system. Alternatively, a failure is predicted from changes in the detected values of the smart meters 11a, 11b, 11c, . . . 11d, and 11e. This prevents a decrease in the amount of power supplied from the distributed power source and a decrease in the self-consumed power amount.

Also, 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 photovoltaic power generation, demand forecasting and storage battery control.
Based on data such as date, day of the week, sunrise time, sunset time, temperature, humidity, and weather forecast acquired from the server, the exclusive units 12a, 12b, 12c, . . . , to predict the power consumption in the shared section 13; By controlling the charging rate of the storage battery 14 so as to minimize the shortage of power generated by the distributed power supply with respect to the predicted power consumption, the maximum value of the purchased power is reduced and peak cut is performed. As a result, the maximum power consumption in the basic contract with the electric power company will be set low, and the basic charge will be reduced.
(2) Varying the capacity of the smart meter depending on the time By changing the settings of the smart meters 11a, 11b, 11c, . Therefore, the electric power demand forecast is performed, the amount of electric power to be procured is predicted, and the capacity of each of the smart meters 11a, 11b, 11c, . As a result, the contract with the electric power company 20 can always be made with the minimum necessary capacity, and the basic charge can be reduced.

In addition, in this embodiment, the following points are conceivable as devised points of the profit distribution method for increasing the self-consumption of electric power.
(1) Change the discount rate of the electricity bill according to the amount of self-consumption The discount rate of the billed amount of electricity for the exclusive areas (tenants) 12a, 12b, 12c, ... increases as the amount of self-consumption increases. contract. As a result, residents are enlightened to reduce power consumption during peak power hours.
(2) Indicate self-consumption amount and rate to encourage self-consumption.
In addition, when notifying the resident 22 of the electricity charge and the amount of electricity used, the self-consumption amount/rate is displayed. As a result, residents 22 are enlightened to reduce power consumption during power peak hours.
(3) Point return Operation is such that the greater the self-consumption of the resident 22, the more points can be obtained. Then, by rewarding points such as discounts and prizes according to the accumulated amount of points, it is possible to enlighten people to curb power consumption during peak power hours.

In addition, the following variations are conceivable for the operation of the power supply system 1 .
(1) Extend equipment life.
A plurality of storage batteries 14 are used. This reduces the number of charge/discharge times and the charge/discharge rate of each storage battery 14 .
(2) Detecting interruption information of the parent smart meters 4a, 4b and the smart meters 11a, 11b, . • Automatically change the capacity of 11e so that each resident 22 uses an independent power source.
(4) Acquiring the schedule information of the resident 22, predicting demand from the information, and performing control to improve self-consumption.
(5) Estimate equipment failures and changes in the resident 22 from abnormal changes (discontinuous changes) in power consumption.

In the above embodiment, the collective housing 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 collective housing. For example, joint offices, industrial parks, etc. are also covered. In the above embodiments, solar cells were used as examples of distributed power sources, but distributed power sources to which the present invention is applied are not limited to solar cells, such as wind power generators, geothermal power generators, and biomass power generators. Other power supplies such as are also included.

In order to allow comparison between the constituent elements of the present invention and the configurations of the embodiments, the constituent elements of the present invention will be 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, . . . );
The power supplied from the system (3a) and/or the power supplied from the distributed power supply (14, 15) is dispersedly supplied to each of the plurality of power supply destinations (12a, 12b, . . . ). electrical devices (9, 10);
power detection means (11a, 11b, . . . , 11d) for detecting power supplied to each of the plurality of power supply destinations (12a, 12b, . . . ) via the power distribution devices (9, 10); ,
grid power detection means (4a, 4b) for detecting power exchanged between the grids (3a, 3b) and the distribution devices (9, 10);
a control device (5) for controlling the electric power related to the charging/discharging or power generation of the distributed power sources (14, 15) based on the electric power values detected by the electric power detecting means (11a, 11b, . . . , 11d); ,
Based on the power values detected by the power detection means (11a, 11b, . . . 11e) and the system power detection means (4a, 4b), a management device (2) for calculating an electricity charge to be charged to each and a return charge to the owner of the complex facility (1b);
A power supply system comprising:
<Invention 2>
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, . . . );
The power supplied from the system (3a) and/or the power supplied from the distributed power supply (14, 15) is dispersedly supplied to each of the plurality of power supply destinations (12a, 12b, . . . ). electrical devices (9, 10);
power detection means (11a, 11b, . . . 11d) for detecting power supplied to each of the plurality of power supply destinations (12a, 12b, . . . ) through the power distribution devices (9, 10); ,
grid power detection means (4a, 4b) for detecting power exchanged between the grids (3a, 3b) and the distribution devices (9, 10);
Based on the power values detected by the power detection means (11a, 11b, . a control device (5) for controlling such electric power;
Using a power supply system (1) comprising
Based on the power values detected by the power detection means (11a, 11b, . . . 11e) and the system power detection means (4a, 4b), Automatically calculating the electricity charges to be charged to each and the return charge to the owner of the complex facility (1b),
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 charge is returned to the owner of the complex facility (1b) ) power management method.

DESCRIPTION OF SYMBOLS 1... Power supply system 1a... Collective housing 2... Management apparatus 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 meter 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 (10)

A power supply system that supplies power to a complex facility that includes multiple 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 a system and/or power supplied from the distributed power supply to each of the plurality of power supply destinations;
power detection means for detecting power supplied to each of the plurality of power supply destinations via the power distribution device;
grid power detection means for detecting power exchanged between the grid and the power distribution device;
a control device for controlling power associated with charging/discharging or power generation of the distributed power supply based on the power value detected by the power detection means;
A management device that calculates an electricity charge to be charged to each of the plurality of power supply destinations and a return charge to the owner of the complex facility based on the power values detected by the power detection means and the grid power detection means. and,
with
The power detection means can change the contract capacity of each of the plurality of power supply destinations by changing settings,
By lowering the contract capacity, it is possible to reduce the electricity bill charged to the power supply destination whose contract capacity is reduced,
The contract capacity of the power supply destination is changed over time by the power detection means based on the power demand forecast,
In the management device, a remote monitoring system detects a failure in the power supply system;
The management device
an electricity rate calculation unit configured to calculate an electricity rate 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 power detection means;
a return charge calculation unit that calculates the return charge based on the electricity charge and a power procurement charge calculated from the amount of power supplied from the system and the unit price of power purchase,
further prepared,
The return charge calculation unit calculates the return charge by subtracting, from the total value of the electricity charge, the power procurement charge and a predetermined management charge determined as a charge including the cost of management by the management device. A power supply system characterized by: The electricity rate calculation unit calculates a first power unit price set to be equal to or less than a unit price of power set for power directly supplied from the grid to the plurality of power supply destinations, and the plurality of power prices detected by the power detection means. 2. The power supply system according to claim 1, wherein an electricity rate to be charged to said plurality of power supply destinations is calculated based on the amount of power supplied to each of said power supply destinations. The electricity rate calculation unit calculates the electricity rate 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. 3. The power supply system according to claim 2, wherein: The power detection means also detects power exchanged between the power distribution device and the distributed power supply,
The first power unit price is changed according to the amount of power supplied from the distributed power supply to the plurality of power supply destinations via the power distribution device, which is detected by the power detection means. The power supply system according to claim 2 or 3, wherein 5. The power supply system according to any one of claims 1 to 4, wherein said distributed power source includes a storage battery. 6. The power supply system according to any one of claims 1 to 5, characterized in that said distributed power sources comprise solar cells. 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 capable of supplying power to the plurality of power supply destinations;
a power distribution device that distributes and supplies power supplied from a system and/or power supplied from the distributed power supply to each of the plurality of power supply destinations;
power detection means for detecting power supplied to each of the plurality of power supply destinations via the power distribution device;
grid power detection means for detecting power exchanged between the grid and the power distribution device;
a control device for controlling power associated with charging/discharging or power generation of the distributed power supply based on the power value detected by the power detection means;
using a power supply system comprising
Based on the power values detected by the power detection means and the grid power detection means, an electricity rate to be charged to each of the plurality of power supply destinations and a return rate to the owner of the complex facility are automatically calculated. death,
impose the electricity fee on the plurality of power supply destinations and return the return fee to the owner of the complex facility;
The power detection means can change the contract capacity of each of the plurality of power supply destinations by changing settings,
By lowering the contract capacity, it is possible to reduce the electricity bill charged to the power supply destination whose contract capacity is reduced,
The contract capacity of the power supply destination is changed over time by the power detection means based on the power demand forecast,
The said return fee is
Calculated based on the electricity rate and a power procurement charge calculated from the amount of power supplied from the system and the unit price of power purchase,
Calculated by subtracting the power procurement fee and a predetermined management fee defined as a fee including management costs from the total value of the electricity fee,
A method of power management by a power supply system, wherein a fault in the power supply system is detected by a remote monitoring system. The electricity rate is
a first power unit price set to be equal to or less than the unit price of power set for power directly supplied from the grid to the plurality of power supply destinations; 8. The power management method according to claim 7, wherein the power management method is calculated based on the amount of power supplied. The electricity rate is
9. The electricity rate 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. power management method. 10. The first power unit price according to claim 8 or 9, wherein the first power unit price is changed according to the amount of power supplied from the distributed power supply to the plurality of power supply destinations via the power distribution device. power management method.

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