Management support system for real estate for lease

Abstract

To provide a management support system for real estate for lease using renewable energy.SOLUTION: A management support system is used in a housing complex 70 including a collective power reception board 82 for supplying collectively received power to multiple living rooms 71, a high-order power distribution board 83 which is connected to the collective power reception board 82, a low-order power distribution board 85 which is installed in each living room 71 and connected to the high-order power distribution board 83, and a connector 71c for load which is connected to the low-order power distribution board 85 and supplies the power to a load in the living room. The management support system includes: a renewable energy power generation mechanism 20; a control device 50; a high-order meter device 81 which detects a received power amount E1 from a power system 100 and a supply power amount E2 to the power system 100; a measurement device 40 which detects a power amount E6 output by the renewable energy power generation mechanism 20; and a first low-order meter device 84A which detects a received power amount E3 received from the power system 100 to a specific living room 71A and a supply power amount E4 that flows backward. The renewable energy power generation mechanism 20 is connected to a specific distribution line Y.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a management support system for rental real estate, and more particularly to a management support system for rental real estate that utilizes renewable energy. [Background technology]

[0002] In July 2018, the Japanese government set a target in the Basic Energy Plan, formulated based on the Basic Act on Energy Policy, of increasing the proportion of solar, wind, and other non-fossil energy sources that can be used sustainably as an energy source (hereinafter referred to as renewable energy) to 22-24% of annual electricity generation in Japan by 2030. In response to this Japanese government target, some companies participating in the Climate Change Initiative, which was established to strengthen the dissemination of information and exchange of opinions among companies, local governments, NGOs, and other organizations that are actively working to combat climate change, have issued a joint message calling for Japan to raise its target for the proportion of renewable energy in its annual power generation to 40-50%, in order to accelerate the introduction of renewable energy by setting a high target and make a more proactive contribution to averting the climate crisis. Despite these targets set by both the public and private sectors and various attempts being made to achieve them, renewable energy accounted for only 18.1% of total electricity generation in fiscal year 2019. In this context, in the 6th Strategic Energy Plan announced by the Japanese government in October 2021, the government has raised its target for the proportion of renewable energy in Japan's annual electricity generation to 36-38% as an ambitious outlook if the effects are realized, assuming that responsible ministries and agencies implement and accelerate policies, replacing previous targets. Therefore, further efforts are required to utilize renewable energy.

[0003] Incidentally, the expected amount of electricity generated by solar power generation is 64 GW if the target of increasing the proportion of renewable energy in total electricity generation to 22-24% by 2030 is achieved, but if the target is raised to 36-38%, it will increase significantly to 103.5-117.6 GW. Therefore, further spread of solar power generation is necessary to achieve the target.

[0004] On the other hand, in order to ensure power supply in the event that large-scale power generation facilities such as nuclear power plants and thermal power plants are forced to shut down due to natural disasters such as earthquakes and typhoons, there is a desire for the spread of renewable energy power generation organizations as multiple small- or medium-scale power generation facilities. In addition, in order to prevent long-term power outages when power transmission lines are damaged by natural disasters such as earthquakes and typhoons, there is a demand for electricity generated in a given area and used within that area, i.e., so-called local production and consumption of electricity. In order to achieve local production and consumption of electricity, taking into consideration the possibility of damage to transmission lines, etc., it is preferable that the distance between the power generation area, where the electricity generating facilities are located, and the demand area, where the electricity is received, is short, and it is even more preferable that the generation area and the demand area are approximately the same. In other words, from the perspective of local production and consumption of electricity, it is preferable to install a renewable energy power generation mechanism in a building such as a detached house and consume the electricity generated within that building. An example of a renewable energy power generation mechanism that can be used relatively easily in buildings such as detached houses is a solar power generation facility.

[0005] As described above, from the perspective of the spread of renewable energy and the local production and consumption of electricity, there is a desire for the spread of solar power generation equipment in buildings such as detached houses. To further popularize the equipment, there is also a demand for its installation in rental properties with multiple facilities that are rented out, such as apartment buildings.

[0006] In response to this, various proposals have been made, and Patent Document 1 proposes a power supply system that enables the installation of power generation equipment using renewable energy in apartment buildings. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent No. 6824600 Summary of the Invention [Problem to be solved by the invention]

[0008] Incidentally, in apartment buildings, rent often varies depending on a variety of factors, including the distance from the apartment building to public transportation, how long the building has been in operation, the size of each room, which floor the room is on, and even if it is on the same floor, whether it is located at the end of the building. Different rents mean that, according to the economic principle that prices are determined by supply and demand, rooms in an apartment building that have a lower rent than other rooms are less likely to find tenants, meaning they are less popular rooms.

[0009] As remote work becomes more common, the number of electrical appliances used in rooms is increasing, and the amount of time they are used is also increasing. Therefore, being able to access cheap and stable electricity can be an important factor when considering whether to rent a room. Therefore, by providing cheaper and more stable electricity access than other rooms, it is possible to increase demand for rooms that are assumed to be unpopular or that have become unpopular, thereby raising the rent for those rooms.

[0010] By making it possible to use renewable energy sources to provide a stable supply of cheap electricity, and supporting the management of rental property owners, it is possible to popularize the installation of renewable energy power generation equipment in rental properties.

[0011] On the other hand, there are already rental properties that, naturally, combine rental facilities with renewable energy power generation facilities. These rental properties often have solar power generation facilities as renewable energy power generation facilities, and some of the electricity generated by the solar power generation facilities is consumed only in the common areas that can be used by the residents of the apartment complex, and most of it is purchased by the power company at a fixed price for a fixed period of time under the feed-in tariff system. When the period during which electric power companies purchase at a fixed price under this feed-in tariff system (the fixed purchase period) has elapsed, the price at which electric power companies purchase is determined based on an optional bilateral contract, but the price often falls sharply, for example from 40 yen / kWh to 8 yen / kWh. Therefore, there is a risk that solar power generation facilities that have been in use will not be maintained and will be abandoned when the fixed purchase period ends. In addition, the purchase price under the feed-in tariff system has continued to fall, and the trend of installing solar power generation equipment in rental properties in anticipation of using the feed-in tariff system has slowed.

[0012] For this reason, it is necessary to support the management of rental property owners by enabling them to make more effective use of renewable energy in rental properties equipped with solar power generation facilities than would be possible if the feed-in tariff system were used.

[0013] As mentioned above, in order to promote the spread of renewable energy power generation equipment in rental properties, and to support the management of owners of rental properties that already combine rental facilities with renewable energy power generation organizations, it is preferable to make effective use of the renewable energy produced by the Renewable Energy Power Generation Organization and to increase the renewable energy usage rate for rental properties as a whole in order to promote local production and consumption of electricity.

[0014] Therefore, the problem that this invention aims to solve is to provide a rental property management support system that supports the management of rental property owners by utilizing renewable energy, and improves the renewable energy usage rate of the rental property as a whole. [Means for solving the problem]

[0015] The management support system of the present invention is used for a rental property having a plurality of facilities, a centralized receiving board, a higher-level distribution board to which power is supplied from the power grid by the centralized receiving board in order to supply the plurality of facilities with collectively received power, a lower-level distribution board installed for each of the plurality of facilities and supplied with power from the higher-level distribution board, and a load connector to which power is supplied from the power grid by the lower-level distribution board and which supplies power to loads in living rooms, the management support system comprising a renewable energy power generation mechanism having a renewable energy power generation facility, a control device for controlling the renewable energy power generation mechanism, and a load connector provided between the power grid and the centralized receiving board, the load connector being connected to the power grid and connected to the loads in living rooms. The system includes an upper meter device that detects the amount of power received E1 from the power grid and the amount of power supplied E2 that is generated by the renewable energy power generation organization and sold to the power grid, a first lower meter device that is installed in at least one of the multiple facilities and detects the amount of power received E3 from the power grid and the amount of power supplied E4 that is reverse-flowed from the renewable energy power generation organization to the power grid, and a measuring device that detects the amount of power E6 output by the renewable energy power generation organization, and the renewable energy power generation organization is connected to a specific distribution line that connects the first lower meter device and a load connector of the facility in which the first lower meter device is installed.

[0016] A specific facility that allows a facility in which a first lower-level meter device is installed to use renewable energy on a priority basis over other facilities, and has a renewable energy supply adjustment mechanism that accumulates the surplus when the total amount of renewable energy used by the specific facility and other facilities falls below the amount of renewable energy generated by the renewable energy power generation equipment, and adjusts the amount so that it can be supplied to facilities other than the specific facility when the total amount of renewable energy used by the specific facility and other facilities exceeds the amount of renewable energy generated by the renewable energy power generation equipment, It is preferable that the renewable energy supply adjustment mechanism is connected to a specific distribution line of a specific facility.

[0017] It is preferable that the facility other than a specific facility allows the facility in which the first lower-level meter device is installed to be given priority in using renewable energy over other facilities, and the control device outputs information on the amount of received energy E1, the amount of fed energy E2, and the amount of supplied energy E4 to a management device that records a second rule that determines a sales price F2 for the amount of electricity received by the facility from the power grid and a fourth rule that determines a sales price F3 for the amount of electricity received by a specific room from a renewable energy power generation organization, and that the management device calculates a system procurement rate γ, which is the procurement rate from the power grid 100, using the following formula based on the information on the amount of received energy E1, the amount of fed energy E2, and the amount of supplied energy E4, and creates billing data for the specific facility. γ = TE1 / (TE1+TE4-TE2) Effect of the Invention

[0018] According to the present invention, it is possible to provide a management support system for rental real estate that supports the management of rental real estate owners by utilizing renewable energy and improves the renewable energy usage rate of the rental real estate as a whole. [Brief description of the drawings]

[0019] [Figure 1] 1 is a block diagram showing a schematic configuration of a rental real estate management support system according to a first embodiment. [Diagram 2] FIG. 2 is an explanatory diagram showing the case where the management support system of FIG. 1 is installed in an apartment building. [Diagram 3] 2 is a flowchart for explaining a method of supplying renewable energy by the management support system of FIG. 1. [Figure 4] 4 is a flowchart for explaining a process for creating billing data for a specific room by the management support system of FIG. 1. [Diagram 5] 4 is a flowchart for explaining the process of creating billing data for general rooms by the management support system of FIG. 1; [Figure 6] FIG. 13 is a block diagram showing a schematic configuration of a rental real estate management support system according to another embodiment. [Figure 7]7 is a flowchart for explaining a billing data creation process performed by the management support system of FIG. 6; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] [First embodiment] Hereinafter, a management support system 10 for rental real estate according to a first embodiment of the present invention (hereinafter simply referred to as the management support system 10) will be described with reference to FIGS. In this embodiment, the management support system 10 is used in an apartment building 70 having a plurality of rooms 71 and shared facilities 72 . 1, the solid lines connecting the blocks indicate the flow of power, the dashed lines indicate a specific power distribution line Y described later, and the dashed lines connecting the blocks indicate the flow of control signals or information to be communicated. The communications indicated by the dashed lines are carried out through a communication network 61 for connecting various devices to each other.

[0021] The management support system 10 of this embodiment is intended to help secure a resident while maintaining a higher rent for a specific room 71A by allowing the specific room 71A, whose rent is set lower than other rooms 71, to be given priority in using electricity generated by a solar power generation facility over the other rooms 71. It is also possible to improve the utilization rate of renewable energy throughout the entire apartment complex 70 while giving priority to use in specific rooms 71. As described below, the management support system 10 is introduced when a contract is made between the owner of an apartment building 70 and an electric power company for the collective purchase of electric power for the entire apartment building. First, the apartment building 70 will be described, and then the management support system 10 will be described.

[0022] [Apartment housing 70] As shown in FIG. 1, the apartment building 70 has living rooms 71, common facilities 72, and a power supply mechanism 80 for supplying power to loads in the living rooms 71 and common facilities 72, which will be described later. The power supply mechanism 80 is connected to a power system 100 . In the apartment building 70, a bulk power receiving business operator that supplies electricity to each room 71 through bulk power receiving enters into a contract (bulk power receiving contract) with an electric power company that supplies electricity via the power system 100 to receive electricity for the entire apartment building 70 in bulk. In this embodiment, the bulk power receiving business operator concludes a low-voltage bulk power receiving contract with the electric power company to receive bulk power at less than the amount of power required for high-voltage bulk power receiving (e.g., 50 kW) since the apartment building 70 does not consume the amount of power required for high-voltage bulk power receiving. The bulk electricity receiving business operator may be the owner of the apartment building 70, a manager entrusted with managing the apartment building 70 by the owner, or the owner of the Renewable Energy Power Generation Organization 20 described below. These entities may be singular or plural. They may also be natural persons or legal entities.

[0023] A plurality of rooms 71 are provided in an apartment building 70 . In this embodiment, as shown in FIG. 2, four rooms 71 are provided on the first floor, and four rooms are also provided on the second floor.

[0024] The rooms 71 can be divided into specific rooms 71A, for which the rent is set low in order to secure residents, and general rooms 71B, for which it is hoped that residents can be secured without lowering the rent. In addition, when there is no need to distinguish between the specific living room 71A and the general living room 71B, they may be simply referred to as rooms 71.

[0025] Conditions that make it difficult to secure residents include conditions common to specific rooms 71A and general rooms 71B, such as the distance from the apartment complex 70 to the nearest station and the age of the apartment complex 70, as well as the size and location of each room 71. The location of the living room 71 may be, for example, the top floor, where the indoor temperature tends to be high in summer, as in the case of the specific living room 71A in this embodiment shown in Figure 2, or it may not be a corner room but has adjacent rooms on both sides.

[0026] As shown in FIG. 1, the specific room 71A can be provided with a specific room load 71a that consumes power. The specific room load 71a may include electrical appliances such as lighting fixtures, air conditioners, microwave ovens, refrigerators, televisions, and routers. Lighting fixtures also include electric lamps such as fluorescent lamps or LED lamps that have sockets pre-installed on the ceiling or wall of specific room 71A and that the resident inserts the lamp base of the lamp into the socket and uses it.

[0027] The specific room 71A is provided with a load connector 71c that is connected to supply power to the specific room load 71a to be used. The load connector 71c may be an outlet into which the power plug of the specific room load 71a is inserted, or a socket provided in advance on the ceiling, wall, etc. of the specific room 71A.

[0028] As shown in FIG. 1, the general room 71B may also be provided with a general room load 71b that consumes power. As with the specific room loads 71a, the general room loads 71b include electrical appliances such as lighting fixtures, air conditioners, microwave ovens, refrigerators, televisions, and routers. Lighting fixtures also include electric lamps such as fluorescent lamps or LED lamps that have sockets pre-installed on the ceiling or wall of specific room 71A and that the resident inserts the lamp base of the lamp into the socket and uses it.

[0029] A load connector 71c is also provided in the general room 71B to be connected to supply power to a general room load 71b to be used. The load connector 71c may be an outlet into which the power plug of the general room load 71b is inserted, or a socket provided in advance on the ceiling, wall, etc. of the general room 71B.

[0030] The shared facility 72 may include a shared facility load 72a that consumes power, as shown in FIG. The shared facility load 72a is equipment that consumes power in the shared facility 72, and examples thereof include emergency equipment (such as a fire alarm), lighting fixtures such as outdoor lights and indoor lights, and a septic tank blower power source. Lighting fixtures also include electric lamps such as fluorescent lamps and LED lamps that have sockets pre-installed in the ceiling or wall of the shared facility 72 and that residents use by inserting the base of the lamp into the socket.

[0031] The shared facility 72 is also provided with a load connector 71c that is connected to supply power to a shared facility load 72a to be used. The load connector 71c may be an outlet into which the power plug of the general room load 71b is inserted, or a socket provided in advance on the ceiling, wall, or the like of the shared facility 72.

[0032] The specific room load 71a of the specific room 71A, the general room load 71b of the general room 71B, and the shared facility load 72a of the shared facility 72 may be collectively referred to as the apartment building load 70a.

[0033] As shown in FIG. 1, the power supply mechanism 80 includes an upper meter device 81, a centralized power receiving board 82, an upper distribution board 83, a lower meter device 84, and a lower distribution board 85.

[0034] The upper meter device 81 is generally called a parent meter, and is provided between the power system 100 and the centralized power receiving panel 82, as shown in FIG. The upper level meter device 81 is a certified meter device that is certified in accordance with the Measurement Act and is within the valid certification period. The upper meter device 81 may be a smart meter.

[0035] The host meter device 81 detects the amount of power purchased by the apartment house 70 from the power system 100, that is, the amount of power received E1 received from the power system 100 by the entire apartment house 70. Furthermore, the upper meter device 81 detects the amount of supplied electric power E2 that the apartment house 70 sells to the electric power grid 100 from the electric power generated by the renewable energy power generation mechanism 20 . The amount of power supply E2 is the amount of surplus power that is reverse-flowed to the power grid 100 when the power output from the renewable energy power generation mechanism 20 is greater than the power received by the specific room load 71a. However, this reverse-flowed power is not received by the general room load 71b in the general room 71B or the shared facility load 72a in the shared facility 72, nor by the second supply adjustment device 34 described below. Then, the upper meter device 81 outputs the detected amount of received electric power E1 and amount of supplied electric power E2 to the control device 50. Specifically, the upper meter device 81 outputs to the control device 50 the amount of received power E1 and the amount of supplied power E2 for each arbitrary unit time (T) such as one second, 30 minutes, or one hour.

[0036] The upper meter device 81 is managed by an electric power company with which the owner of the apartment building 70 has a bulk power receiving contract, and the output received power amount E1 and supplied power amount E2 are used for creating billing data D, which will be described later.

[0037] As shown in FIG. 1, the collective power receiving panel 82 is connected to a higher-level meter device 81 via a detection device 31 (described later), and is used to receive power from the power system 100 by low-voltage collective power receiving. The centralized power receiving board 82 supplies the power received from the power system 100 to the upper level distribution board 83 .

[0038] 1, the distribution line provided downstream from the centralized power receiving board 82 branches into two at branch point X, and the upper distribution board 83 is connected to one of the two branches. The other branch is connected to a second supply adjustment device 34, which will be described later.

[0039] The lower level meter device 84 is generally called a child meter, and is a certified meter device that has been certified in accordance with the Measurement Act and is within the valid certification period. The lower-level meter device 84 may be a smart meter.

[0040] As shown in FIG. 1, the lower meter device 84 is divided into a first lower meter device 84A installed in the specific room 71A and a second lower meter device 84B installed in the general room 71B.

[0041] The first lower level meter device 84A measures the amount of received power E3 that the specific room load 71a of the specific room 71A receives from the power system 100, and outputs the measured amount of power to the control device 50. Furthermore, when the power output from the renewable energy power generation mechanism 20 is greater than the power received by the specific room load 71a, the surplus power will be reverse-flowed to the power grid 100 by the first lower-level meter device 84A installed in the specific room 71A. The first lower-level meter device 84A measures the amount of power of the surplus power reverse-flowed and outputs the measured amount of power to the control device 50 as the supply power amount E4. Specifically, the first lower level meter device 84A outputs to the control device 50 the amount of received power E3 and the amount of supplied power E4 for each arbitrary unit time (T) such as one second, 30 minutes, or one hour.

[0042] The first lower level meter device 84A is managed by the bulk power receiving business operator, and the output received power amount E3 and supplied power amount E4 are used for calculating the electricity fee to be charged to the occupant of the specific room 71A.

[0043] The second lower level meter device 84B measures the amount of received power received by the general room load 71b in the general room 71B. The amount of power received by the general room load 31b is the sum of the amount of power from the power grid 100 and the amount of power from the renewable energy power generation mechanism 20 that is not received by the specific room load 71a of the specific room 71A and is instead flowed back to the power grid 100, which is the amount of power E5. The supplied electric energy E2 is the amount of electric energy E6 supplied from the renewable energy power generation mechanism 20 to the specific room 71A, but is not received by the specific room load 71a of the specific room 71A, the general room load 71b of the general room 71B, or the shared facility load 72a of the shared facility 72, and is not received by the second supply adjustment device 34, and is instead the amount of electric energy that is flowed back to the power grid 100. The second lower level meter device 84B is managed by the bulk power receiving business operator, and the output amount of received power is used for calculation of the electricity fee to be charged to the resident, etc.

[0044] The second lower level meter device 84B is also used to measure the amount of power E5 received by the shared facility load 72a of the shared facility 72. The second lower level meter device 84B is connected to the shared facility 72 as shown in FIG. 1, and measures the amount of power received by the shared facility load 72a of the shared facility 72.

[0045] As shown in FIG. 1, the lower distribution board 85 is provided in each room 71 and the shared facilities 72. The lower distribution board 85 provided in the specific room 71A is connected to the renewable energy power generation mechanism 20 via the measurement device 40. Note that only the lower distribution board 85 provided in the specific room 71A may have a structure that allows connection to the renewable energy power generation mechanism 20.

[0046] [Management Support System 10] Next, the management support system 10 of this embodiment will be described. As shown in FIG. 1, the management support system 10 includes a renewable energy power generation mechanism 20, a renewable energy supply adjustment mechanism 30 for efficiently using renewable energy produced by the renewable energy power generation equipment in general rooms 71B and shared facilities 72 while giving priority to specific rooms 71A, a measuring device 40 for measuring the amount of electricity E6 output from the renewable energy power generation mechanism 20 and supplied to the specific rooms 71A, a control device 50 for controlling the renewable energy power generation mechanism 20 and the renewable energy supply adjustment mechanism 30, and a management device 60 for acquiring information such as the amount of power consumption from the control device 50. Each component will be described below.

[0047] As shown in FIG. 1, the renewable energy power generation mechanism 20 includes a solar power generation facility 21 and a power conditioner system (PCS) 22.

[0048] As shown in FIGS. 1 and 2, the solar power generation facility 21 includes a solar module 21a. 2, three solar modules 21a are arranged vertically on the roof of the apartment building 70 to form a string, and eight of these strings are arranged horizontally to form an array. That is, in this embodiment, 24 solar modules 21a are installed on the roof of the apartment building 70.

[0049] The power conditioner 22 is for controlling charging and discharging from the photovoltaic power generation facility 21, and charging and discharging from a first storage battery 33a constituting a first supply adjustment device 33 described later.

[0050] The power conditioner 22 includes an inverter that converts the DC power generated by the photovoltaic power generation facility 21 into AC power, and a state detection unit. The status detection unit monitors the operating status of the photovoltaic power generation facility 21 and the first supply adjustment device 33, and outputs the acquired operation log to the control device 50. The operation log includes the power generation status of the photovoltaic power generation facility 21, the charge / discharge status of the first storage battery 33a, error information, and the like.

[0051] As shown in FIG. 1, the power conditioner 22 is connected at a branch point Z to a specific power distribution line Y in a specific room 71A (described later) via a power generation meter used as a measuring device 40.

[0052] The power conditioner 22 may include an optimizer that performs maximum power point tracking (MPPT) control for each solar cell module 21a, which automatically controls the power point (value of current x voltage) at which the maximum amount of power generation can be obtained.

[0053] Next, the renewable energy supply adjusting mechanism 30 will be described. As shown in Figures 1 and 2, the renewable energy supply adjustment device 30 has a detection device 31 that detects forward power flow from the power grid 100, a first power adjustment device 33 that allows surplus power generated by the solar power generation equipment 21 to be used preferentially in a specific room 71A, and a second supply adjustment device 34 that allows stored renewable energy to be supplied to general private rooms 71B and shared facilities 72 when there is no reverse power flow from the solar power generation equipment 21.

[0054] The detection device 31 detects the forward flow of power from the power grid 100 to check whether the amount of power generated by the solar power generation equipment 21 and the amount of power supplied from the first power adjustment device 33 and the second supply adjustment device 34 are below the amount of power consumed by the apartment building load 70a. Specifically, when the detection device 31 detects a forward power flow, the amount of electricity generated by the solar power generation equipment 21 and the amount of electricity supplied from the first power adjustment device 33 and the second supply adjustment device 34 are lower than the amount of electricity consumed by the apartment building load 70a, so electricity is being supplied from the power grid 100. On the other hand, when the detection device 31 does not detect forward power flow, the amount of electricity generated by the solar power generation equipment 21 and the amount of electricity supplied from the first power adjustment device 33 and the second supply adjustment device 34 exceed the amount of electricity consumed by the apartment building load 70a, causing a reverse power flow. It is possible that a state in which the forward power flow from the power system 100 and the reverse power flow to the power system 100 are in balance may occur. However, since the period of time in which the state of balance occurs is considered to be shorter than time T1, which will be described later, this state is not taken into consideration in this embodiment.

[0055] In order to check whether the amount of electricity generated by the solar power generation equipment 21 and the amount of electricity supplied from the first power adjustment device 33 and the second supply adjustment device 34 are below the amount of electricity consumed by the apartment building load 70a, it is sufficient for the detection device 31 to be installed between the upper-level meter 81 and the branch point X, but it is preferable to install it between the upper-level meter 81 and the centralized receiving board 82, as shown in Figure 1.

[0056] In this embodiment, a CT (Current Transformer) sensor is used as the detection device 31. When the CT sensor detects a forward power flow, the detection result is output to the status detection unit of the power conditioner 22, but the detection result may first be output to the control device 50, and then output from the control device 50 to the status detection unit of the power conditioner 22.

[0057] First supply adjustment device 33 is for enabling surplus electricity generated by photovoltaic power generation facility 21 to be used preferentially in specific room 71A. In this embodiment, as shown in FIG. 1, the first supply adjustment device 33 is provided with a first storage battery 33a.

[0058] When the amount of power consumed by the collective housing load 70a falls below the amount of power generated by the renewable energy power generation mechanism 20, the first storage battery 33a can store surplus power. Specifically, when the detection device 31 does not detect a forward power flow, that is, when a reverse power flow occurs on the power grid 100 side, surplus power is stored in the first storage battery 33a. When the power consumption of the collective housing load 70a exceeds the power generation amount of the photovoltaic power generation facility 21, the power is preferentially supplied from the first storage battery 33a to the specific room 71A. Note that, even when the power consumption of the specific room load 71a exceeds the power generation amount of the photovoltaic power generation equipment 21, power may be supplied from the first storage battery 33a as well.

[0059] The first storage battery 33a can store surplus power even when the amount of power generated by the solar power generation facility 21 exceeds the processing capacity of the power conditioner 22. In this case, when the amount of power generated by the solar power generation facility 21 falls below the processing capacity of the power conditioner 22, the first storage battery 33a can discharge the surplus power.

[0060] Furthermore, when the first storage battery 33a stores electricity up to a predetermined maximum capacity, the storage of electricity in the first storage battery 33a may be stopped. Furthermore, when the first storage battery 33a is discharged to a predetermined minimum capacity, the discharge from the first storage battery 33a may be stopped.

[0061] The first storage battery 33a may directly store the DC power from the photovoltaic power generation facility 21. In that case, when power is supplied from the first storage battery 33a to the specific room load 71a in the specific room 71A or to the power system 100, the DC power extracted from the first storage battery 33a is converted into AC power by the power conditioner 22 and then supplied.

[0062] In addition, when the purchase price P1 for the amount of power E1 received by the apartment building 70 from the power company that supplies power via the power grid 100 varies depending on the time of day, the first storage battery 33a can purchase and store electricity during the time period when the purchase price P1 is cheaper.

[0063] In addition to a storage battery, a charger for an electric vehicle or the like can be suitably used as the first supply adjustment device 33. This allows power from the solar power generation facility 21 to be stored in the storage battery of the electric vehicle. If the first supply adjustment device 33 is a charger for an electric vehicle, a V2H (Vehicle to home) system may be provided to supply power from a storage battery installed in the electric vehicle to a specific room load 71a in the specific room 71A. When a V2H system is installed, when power is supplied from a storage battery installed in an electric vehicle to a specific room load 71a in a specific room 71A or to the power grid 100 side, the DC power of the storage battery installed in the electric vehicle is converted to AC current by a power conditioner 22 and supplied.

[0064] The second supply adjustment device 34 is designed to allow surplus electricity that is flowed back from the specific room 71A to the power grid 100 and is not consumed in the general rooms 71B and goes out to the power grid 100 to be used in the general rooms 71B and shared facilities 72 when the amount of electricity consumed by the apartment building load 70a exceeds the amount of electricity generated by the renewable energy power generation mechanism 20.

[0065] In this embodiment, a second storage battery 34a is provided as the second supply adjustment device 34. This makes it possible to discharge electricity stored in the second storage battery 34a during times when electricity demand is likely to peak, such as in the morning or evening. In addition, in the case where the purchase price P1 for the amount of power E1 received by the apartment building 70 from the electric power company that supplies power via the power grid 100 varies depending on the time of day, the second storage battery 34a can purchase and store electricity during the time period when the purchase price P1 is cheaper.

[0066] In order to prevent overcharging of the second storage battery 34a during storage, the storage may be stopped when the capacity reaches a predetermined maximum capacity. Furthermore, during discharging, the discharging may be stopped when the capacity reaches a predetermined minimum capacity. In addition, it is preferable that a measuring device 40 is provided between the second supply adjustment device 34 and the branch point X, similar to the measuring device 40 described later being provided between the lower distribution board 85 provided in the specific room 71A and the renewable energy power generation mechanism 20.

[0067] Next, the measuring device 40 will be described. The measuring device 40 is for measuring the amount of power E6 output from the photovoltaic power generation facility 21 or the first supply adjustment device 33, and for outputting the acquired data to the control device 50. In this embodiment, a power generation meter is used as the measurement device 40. The power generation meter is a certified meter device certified in accordance with the Weights and Measures Act, and is within the validity period of certification. The power generation meter outputs to the control device 50 the amount of power E6 per any unit time (T), such as one second, 30 minutes, or one hour.

[0068] As shown in FIG. 1, the measurement device 40 is connected to a specific distribution line Y that connects the first lower-level meter 84A of the specific room 71A and the load connector 71c. Specifically, the measurement device 40 is connected to a branch point Z formed by a terminal block on a specific distribution line Y via a distribution line. This makes it possible to measure the amount of supplied power E4 by the first lower-level meter 84A, and also makes it possible to supply power from the renewable energy power generation mechanism 20 up to the load connector 71c to which the specific room load 71a is connected. Furthermore, since the measuring device 40 can be easily connected to the specific distribution line Y at a selected location, the management support system 10 can be easily installed even in an apartment building that has already been constructed.

[0069] It is sufficient for the measuring device 40 to be connected to the specific distribution line Y from the first lower meter 84A to the load connector 71c, but it is preferable for the measuring device 40 to be connected to a location located outside the exterior wall of the apartment building 70, or to a location fixed to a part that constitutes the exterior wall of the apartment building 70 on the wall surface inside the specific living room 71A.

[0070] The measuring device 40 may be a smart meter. Furthermore, if permitted by amendments to the Measurement Act, the power conditioner 22 may be used, instead of a power generation meter, to measure the amount of power E6 output from the photovoltaic power generation facility 21 or the first storage battery 33a and output the acquired data to the control device 50. In other words, in this case, the power conditioner 22 also functions as the measurement device 40.

[0071] Next, the control device 50 will be described. The control device 50 includes a data collection unit 51 and a control unit 52 . The data collection unit 51 periodically acquires the amounts of power measured by the upper meter device 81, the first lower meter device 84A, the second lower meter device 84B, and the measuring device 40 via communication, and outputs the amounts of power measured to the control unit 52. In addition, the data collection unit 51 outputs the operation log acquired from the power conditioner 22 to the management device 60.

[0072] The control unit 52 may, for example, control the power conditioner 22, and control the charging and discharging of the first supply adjustment device 33 and the second supply adjustment device 34. The processing executed by the control unit 52 includes a processor such as a CPU (Central Processing Unit) for executing a program that defines a control procedure stored in a storage unit of the control device 50 or an external storage medium (not shown). The control unit 52 communicates with a management device 60 via a communication network 61 . The control unit 52 outputs, for example, the acquired amount of received power and amount of fed power, the plurality of individual amounts of consumed power, and the amount of generated power to the management device 60.

[0073] Next, the management device 60 will be described. The management device 60 obtains information such as power consumption from the control device 50 and provides services such as supporting meter reading data management, supporting the creation of billing data D, and visualizing electricity usage to make it easier for residents and managers to understand trends in electricity usage. Furthermore, when the management device 60 receives error information from the control device 50, it notifies the supervisor, who is the user of the management device 60, that an error has occurred by voice, lamp, image, video, telephone, email, or the like.

[0074] The management device 60 stores at least a first rule, a second rule, a third rule, and a fourth rule for creating the billing data D.

[0075] The first rule prescribes a purchase price P1 for the amount of power E1 received by the apartment house 70 from the power company. The purchase price P1 may be set for each time period, such as a purchase price P1a during the day and a purchase price P1b at night.

[0076] The second rule stipulates a selling price F1 for the amount of power E2 supplied to the power company. The selling price F1 is determined between the power company and the electricity supplier. During the purchase period of the feed-in tariff system for electricity, the purchase price determined by the feed-in tariff system becomes the selling price F1. Outside the purchase period, the purchase price determined based on an optional bilateral contract becomes the selling price F1.

[0077] The third rule stipulates a selling price F2 for the amount of electricity received by each room 71 from the power company. If the purchase price P1 is set for each time period, such as purchase price P1a or purchase price P1b, the sales price F2 can be set according to the time period, such as sales price F2a corresponding to purchase price P1a and sales price F2b corresponding to purchase price P1b. In this way, if the nighttime purchase price P1b is cheaper than the daytime purchase price P1a, the resident of each room 71 can use electricity more cheaply at night than during the day.

[0078] The fourth rule stipulates a selling price F3 for the amount of electricity received by room 71A from renewable energy power generation organization 20. The selling price F3 is set to be lower than the selling price F2. This allows the resident of the specific room 71A to preferentially use the electricity supplied from the renewable energy power generation organization 20, thereby reducing the electricity bill. The sales fee F3 is preferably higher than the sales price F1. This allows the owner of the apartment building 70 to earn a greater profit than if the owner sold the electricity to the power company, which can be a major incentive for the owner to introduce the renewable energy power generation organization 20. From the above, it is preferable that the selling price F1, the selling price F2, and the selling fee F3 have the following relationship. Selling price F2 > Selling price F3 > Selling price F1

[0079] The management device 60 may be provided outside the apartment building 70 or may be provided inside the apartment building 70 .

[0080] The communication network 61 is composed of a wireless communication network using LTE (long Term Evolution) or Wifi (registered trademark) or a wired communication network using optical lines. The communication network 61 may be configured by combining a plurality of wireless communication networks and wired communication networks as described above. In addition, in this embodiment, the communication between the power conditioner 22 and the control device 50 complies with ECHONET Lite (registered trademark), but may be transmitted in accordance with Modbus (registered trademark) or a protocol unique to the manufacturer of the power conditioner 22. Furthermore, the communication between the control device 50 and the management device 60 may be performed based on another communication method.

[0081] The management support system 10 of this embodiment configured as described above supplies the power generated by the renewable energy power generation mechanism 20 to the specific room 71A, the general room 71B, and the shared facility 72.

[0082] <Method of supplying renewable energy using management support system 10> A method for supplying the renewable energy generated by the renewable energy power generation mechanism 20 by the management support system 10 will be described below with reference to FIG.

[0083] The management support system 10 of this embodiment has a determination process (FIG. 3: S3-1 to 3-3) that determines whether a supply process or an accumulation process described below will be performed at each predetermined time, a supply process (FIG. 3: S3-4 to 3-6) that supplies renewable energy that has been accumulated in the first supply adjustment device 33 and the second supply adjustment device 34 when the amount of electricity generated by the solar power generation facility 21 falls below the power consumption of the apartment building load 70a, and an accumulation process (FIG. 3: S3-7 to 3-9) that stores surplus electricity generated by the solar power generation facility 21 in the first supply adjustment device 33 and the second supply adjustment device 34. The determination step, the supply step, and the storage step will be described in this order below. Note that T1, which will be described later, is determined by the charging and discharging control capability through the processing of the first storage battery 33a of the first supply adjustment device 33 and the second storage battery 34a of the second supply adjustment device 34. Specifically, T1 is set to be longer than the time required for the first storage battery 33a to be switched from a discharging state to a charging state, or from a charging state to a discharging state. The same applies to the creation of fee data D, which will be described later.

[0084] First, the determination step (FIG. 3: S3-1 to S3-3) will be described. As shown in FIG. 3, the determination step determines in step 3-1 whether a time T1 has elapsed. If the time T1 has elapsed (FIG. 3: S3-1 Y), the process proceeds to step 3-2, which will be described later. On the other hand, if the time T1 has not elapsed (FIG. 3: S3-1 N), the process again determines whether the time T1 has elapsed.

[0085] Next, in step 3-2, charging and discharging from the second supply adjustment device 34 is stopped. This allows the charging and discharging of the first supply adjustment device 33 to be given priority in the supply process and storage process described below.

[0086] Next, in step 3-3, the presence or absence of a forward power flow from the power system 100 is confirmed. Specifically, the forward power flow is detected by the detection device 31, and the detection result is output to the power conditioner 22 and the control device 50. If the detection device 31 detects a forward power flow (FIG. 3: S3-3 Y), the process proceeds to a supply process, which will be described later. On the other hand, if the detection device 31 does not detect a forward power flow (FIG. 3: S3-3 N), the process proceeds to a storage process, which will be described later.

[0087] Next, the supplying step (FIG. 3: S3-4 to S3-6) will be described. First, in step 3-4, discharging is started from the first storage battery 33a of the first supply adjustment device 33. As a result, the power generated by the solar power generation facility 21 of the renewable energy power generation mechanism 20 is preferentially supplied to the specific room 71A. Furthermore, if the amount of power consumed in the specific room 71A is less than the amount of supply, power is reverse-flowed from the specific room 71A to the power grid 100 side and supplied to the general room 71B and the shared facility 72. The discharge from the first storage battery 33a that has started is continued if a forward power flow is detected again in step 3-3 after a time T1 has elapsed since returning to step 3-1, as described below. On the other hand, if a forward power flow is not detected in step 3-3, the discharge is continued until the first storage battery 33a starts storing power in step 3-7, as described below.

[0088] Then, in step 3-5, the presence or absence of a forward power flow from the power system 100 is confirmed. If the detection device 31 detects a forward power flow (FIG. 3: S3-5 Y), the process proceeds to step 3-6, which will be described later. On the other hand, if the detection device 31 does not detect a forward power flow (FIG. 3: S3-5 N), the discharge from the first supply adjustment device 33 is sufficient, so the process returns to step 3-1.

[0089] In step 3-6, the second storage battery 34a of the second supply adjustment device 34 is discharged. As a result, the renewable energy stored in the second storage battery 34a is supplied not only to the specific room 71A but also to the general room 71B and the shared facility 72. When discharging of the second storage battery 34a starts, the process returns to step 3-1.

[0090] Next, the accumulation step (FIG. 3: S3-7 to S3-8) will be described. First, in step 3-7, power storage is started in the first storage battery 33a of the first supply adjustment device 33. As a result, in the above-mentioned step 3-4, the power generated by the solar power generation facility 21 of the renewable energy power generation mechanism 20 can be preferentially supplied to the specific room 71A. The started power storage in the first storage battery 33a is continued if a forward power flow is not detected again in step 3-3 after a time T1 has elapsed since returning to step 3-1, as described below. On the other hand, if a forward power flow is detected in step 3-3, the power storage is continued until discharging from the first storage battery 33a is started in step 3-7, as described below.

[0091] Then, in step 3-8, the presence or absence of a forward power flow from the power system 100 is confirmed. If the detector 31 detects a forward power flow (FIG. 3: S3-8 Y), the discharge from the first supply adjustment device 33 is sufficient, so the process returns to step 3-1. On the other hand, if the detection device 31 does not detect a forward power flow (FIG. 3: S3-8 N), the process proceeds to step 3-9, which will be described later.

[0092] In step 3-9, power storage is started in the second storage battery 34a of the second supply adjustment device 34. This makes it possible to supply the renewable energy stored in the second storage battery 34a in the above-mentioned step 3-6. When discharging of the second storage battery 34a starts, the process returns to step 3-1.

[0093] Next, a description will be given of the creation of the billing data D. First, the case of the specific room 71A will be described, and then the case of the general room 71B will be described.

[0094] <Creating billing data D for specific room 71A> The creation of the billing data D for the specific room 71A will be described with reference to FIG. First, in step 4-1, it is determined whether or not a time T1 has elapsed. If the time T1 has elapsed (FIG. 4: S4-1 Y), the process proceeds to step 4-2, which will be described later. On the other hand, if the time T1 has not elapsed (FIG. 4: S4-1 N), it is again determined whether the time T1 has elapsed.

[0095] Next, in step 4-2, the amount of electric power TE6 during T1 is calculated. In this embodiment, the calculation is based on the amount of electric power E6 per unit time (T), such as 1 second, 30 minutes, or 1 hour, measured by a power generation meter used as the measurement device 40. After calculating the amount of power TE6 during T1, proceed to step 4-3.

[0096] Next, in step 4-3, the amount of power TE4 during T1 is calculated. In this embodiment, the calculation is based on the amount of power supply E4 per unit time (T), such as 1 second, 30 minutes, or 1 hour, measured by the first lower level meter device 84A. After calculating the amount of power TE4 during T1, proceed to step 4-4.

[0097] Next, in step 4-4, the amount of power TE3 during T1 is calculated. In this embodiment, the calculation is based on the amount of received power E3 per unit time (T), such as 1 second, 30 minutes, or 1 hour, measured by the first lower level meter device 84A. After calculating the amount of power TE3 during T1, proceed to step 4-5.

[0098] Next, in step 4-5, first billing data D1, which is billing data for the electricity supplied from the renewable energy power generation mechanism 20, is created. Specifically, the difference between the amount of electric power TE6 calculated in step 4-2 and the amount of electric power TE4 calculated in step 4-3 is calculated, and the difference is multiplied by the selling price F3 defined in the fourth regulation to generate the value. Once the first billing data D1 has been created, the process proceeds to step 4-6.

[0099] Next, in step 4-6, second billing data D2, which is billing data for the power supplied from the power system 100, is calculated. Specifically, the amount of power E3 received by the specific room load 71a of the specific room 71A from the power system 100 is multiplied by the sales price F2 defined in the third regulation to generate the second billing data D2. After creating the second billing data D2, proceed to step 4-7.

[0100] Next, in step 4-7, billing data D for T1 is generated. Specifically, the billing data D is generated by adding the second billing data D2 generated in step 4-6 to the first billing data D1 generated in step 4-5. Once the billing data D has been created, return to step 4-1.

[0101] <Creating billing data D for general room 71B> Next, the creation of the billing data D for the general room 71B will be described with reference to FIG. The billing data D for the general room 71B is created as follows. First, in step 5-1, the number of detections in the detection device 31 is set to "0." As a result, it is possible to confirm that a time period of T1 has elapsed in step 5-2 described below, and by confirming in step 5-8 that detection by the detection device 31 has been repeated a predetermined number of times A, it is possible to determine that a time period of T2 has elapsed. In other words, T2 is the value obtained by multiplying T1 by A.

[0102] Next, in step 5-2, it is determined whether or not a time T1 has elapsed. If the time T1 has elapsed (FIG. 5: S5-2 Y), the process proceeds to step 5-3 described below. On the other hand, if the time T1 has not elapsed (FIG. 5: S5-2 N), it is again determined whether the time T1 has elapsed.

[0103] Next, in step 5-3, the amount of power TE5 during T1 is calculated. In this embodiment, the calculation is based on the amount of received power E5 per unit time (T), such as 30 minutes or 1 hour, measured by the second lower meter device 84B. After calculating the amount of power TE5 during T1, proceed to step 5-4.

[0104] Next, in step 5-4, it is determined whether the CT sensor constituting the detection device 31 has detected a forward power flow toward the power grid 100. This detection is performed after the lapse of time T1, and corresponds to the detection in step 3-3 of the process of adjusting the supply of renewable energy described above. If a forward power flow is detected (FIG. 5: S5-4 Y), the process proceeds to step 5-5, which will be described later. On the other hand, if a forward power flow is not detected (FIG. 5: S5-4 N), the process proceeds to step 5-6, which will be described later.

[0105] In step 5-5, since forward power flow was detected in step 5-4, TE5 calculated in step 5-3 is added to TE7, which is the total power amount from the forward power flow side during T2, to update the value of TE7. Once you have updated the value of TE7, proceed to steps 5-7 described below.

[0106] On the other hand, if no forward flow is detected in step 5-4 (Figure 5: S5-4 N), in step 5-6, TE5 calculated in step 5-3 is added to TE8, which is the total power amount from the forward flow side during T2, to update the value of TE8. Once you have updated the TE8 value, proceed to steps 5-7 below.

[0107] Next, in step 5-7, the number of detections N by the detection device 31 is updated by adding 1 to the number of detections N.

[0108] Next, in step 5-8, it is confirmed whether the number of detections N by the detection device 31 reaches a predetermined number of detections A. If N is the same value as A (Figure 5: S5-8 Y), proceed to step 5-9 described below. If N is not the same value as A (Figure 5: S5-8 N), return to step 5-2.

[0109] Next, in step 5-9, first billing data D1, which is billing data for the electricity supplied from renewable energy power generation mechanism 20, is created. Specifically, it is created by multiplying the amount of power TE8 calculated in step 5-6 by the selling price F3 defined in the fourth regulation. After creating the first billing data D1, the process proceeds to step 5-10.

[0110] Next, in step 5-10, second billing data D2, which is billing data for the power supplied from the power system 100, is calculated. Specifically, it is created by multiplying the amount of power TE7 calculated in step 5-5 by the selling price F2 defined in the third agreement. After creating the second billing data D2, the process proceeds to step 5-11.

[0111] Next, in step 5-11, billing data D for T1 is generated. Specifically, the billing data D is generated by adding the second billing data D2 generated in step 5-10 to the first billing data D1 generated in step 5-9. Once the billing data D for the general room 31B has been created, the process returns to step 5-1.

[0112] Effects of Management Support System 10 Next, the effects achieved by the management support system 10 of this embodiment will be described. The management support system 10 of this embodiment is used in an apartment building 70 that includes a centralized power receiving board 82, a higher-level distribution board 83 to which power is supplied from the power grid 100 by the centralized power receiving board 82, a lower-level distribution board 85 that is installed for each of the rooms 71 and to which power is supplied from the higher-level distribution board 83, and a load connector 71c that receives power from the power grid 100 by the lower-level distribution board 85 and supplies power to loads in the rooms, in order to supply power that has been received centrally to a plurality of rooms 71 and a shared facility 72. The management support system 10 of this embodiment includes a renewable energy power generation mechanism 20 that includes a solar power generation facility 21, a control device 50 that controls the renewable energy power generation mechanism 20, and a power collection device 71 that is installed between the power grid 100 and the centralized power receiving board 82 and collects and stores the power. The shared housing 70 has an upper meter device 81 that detects the amount of power received E1 from the power grid 100 and the amount of power supplied E2 that is generated by the renewable energy power generation mechanism 20 and sold to the power grid 100, a first lower meter device 84A that is installed in a specific dwelling room 71A and detects the amount of power received E3 from the power grid and the amount of power supplied E4 that is flowed back from the renewable energy power generation mechanism 20 to the power grid 100, and a measuring device 40 that detects the amount of power output E6 by the renewable energy power generation mechanism 20, and the renewable energy power generation mechanism 20 is connected to a specific distribution line Y that connects the first lower meter device 84A of the specific dwelling room 71A in which the first lower meter device 84A is installed to a load connector 71c. The management support system 10 of this embodiment has the above-mentioned configuration, and thus can enable the specific room 71A to use renewable energy preferentially over other rooms.

[0113] Furthermore, since the measuring device 40 can be easily connected to the specific distribution line Y at a selected location, the management support system 10 can be easily installed even in an apartment building that has already been constructed. Specifically, when introducing the management support system 10 into an already constructed apartment building 70, there may be cases where the room 71 to be made into the specific room 71A is already being used by a resident. In such a case, it is preferable to reduce the number of steps to be performed in the room 71 in the construction work for making the room 71 into the specific room 71A. If the distribution line connected to the measuring device 40 were to be connected to a lower distribution board 85 instead of a specific distribution line Y, the lower distribution board 85 is often installed within the living room 71, and therefore it would be necessary to run the distribution line from outside the living room 71 to the lower distribution board 85 installed within the living room 71. In contrast, in this embodiment, it is possible to select where on the specific power distribution line Y the distribution line connected to the measurement device 40 is to be connected, so that it is possible to select the location to connect to the specific power distribution line Y so as to reduce the work time and steps required for the pull-in work inside the room, and depending on the position of the lower-level meter 84A, it is possible to eliminate the work of pulling the distribution line connected to the measurement device 40 into the room. Therefore, the workload when installing the management support system 10 can be reduced.

[0114] In addition, the management support system 10 of this embodiment has a renewable energy supply adjustment mechanism 30 that accumulates the surplus when the amount of power consumption in the apartment building load 70a falls below the amount of renewable energy produced by the solar power generation equipment 21, and adjusts it so that it can be supplied to general rooms 71B and shared facilities 72 when the amount of power consumption exceeds the amount of renewable energy produced by the solar power generation equipment 21. By having the above-mentioned configuration, the management support system 10 of this embodiment can prioritize the supply of renewable energy to the specific room load 71a of the specific room 71A, while quickly responding to not only the power consumption situation in the specific room load 71a of the specific room 71A, but also the power consumption situation in the general room load 71b of the general room 71B and the shared facility load 72a of the shared facility 72, thereby improving the self-sufficiency rate of renewable energy for the entire apartment complex 70. In other words, if the renewable energy supply adjustment mechanism only responds to the power consumption status of the specific room load 71a, when the amount of power generated by the photovoltaic power generation facility 21 exceeds the amount of power consumed by the specific room load 71a and a reverse power flow occurs to the power grid 100, the surplus power is charged and is not supplied to the general room load 71b and the shared facility load 72a. Then, when a certain amount of charging is performed, the power is reversed to the power grid 100 to prevent overcharging of the first storage battery 33a, but the power is reversed to the power grid 100 regardless of the power consumption status of the general room load 71b and the shared facility load 72a, so the power may be reversed to the power grid 100 as it is, and the self-sufficiency rate cannot be improved. In contrast, in the business support system 10 of this embodiment, even if the amount of electricity generated by the solar power generation equipment 21 exceeds the amount of electricity consumed by the specific room load 71a, the supply to the general room load 71b and the shared facility load 72a is not stopped, thereby improving the self-sufficiency rate.

[0115] Second Embodiment Next, a second embodiment will be described with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the description thereof will be omitted. Also in FIG. 6, solid lines connecting each block indicate the flow of power, and dashed lines connecting each functional block indicate the flow of control signals or communicated information.

[0116] The management support system 10 of this embodiment is intended to help secure a resident while keeping the rent for a specific room 71A higher by calculating the electricity usage fee charged for the specific room 71A, whose rent is set lower than that of other rooms 71, so that the fee is lower than that for the other rooms 71.

[0117] In this embodiment, as shown in FIG. 6, the renewable energy power generation mechanism 20, which is connected to a specific room 71A in the first embodiment, is connected to a shared facility 72.

[0118] As shown in FIG. 6, the shared facility 72 of this embodiment is provided with a first lower-level meter device 84A, which is provided in the specific room 71A in the first embodiment. On the other hand, a second lower meter device 84B is provided in the specific room 71A. The second lower meter device 84B is also used to measure the amount of power E5 received by the specific room load 71c. In this embodiment, the amount of electricity E5 is the sum of the amount of electricity from the power grid 100 and the amount of electricity from the renewable energy power generation mechanism 20 that is not received by the shared facility load 72 of the shared facility 72 and is flowed back to the power grid 100.

[0119] <Creating billing data D for facility a> Next, the creation of the billing data D for a facility a other than the facility connected to the renewable energy power generation mechanism 20 will be described with reference to FIG. In this embodiment, the specific room 71A and the general room 71B correspond to facility a.

[0120] First, in step 7-1, it is determined whether or not a time T1 has elapsed. If the time T1 has elapsed (FIG. 7: S7-1 Y), the process proceeds to step 7-2, which will be described later. On the other hand, if the time T1 has not elapsed (FIG. 7: S7-1 N), it is again determined whether the time T1 has elapsed.

[0121] Next, in step 7-2, the amount of power TE1 during T1 is calculated. In this embodiment, the calculation is based on the amount of received power E1 per unit time (T), such as 1 second, 30 minutes, or 1 hour, measured by the upper meter 80. After calculating the amount of power TE1 during T1, proceed to step 7-3.

[0122] Next, in step 7-3, the amount of power TE2 during T1 is calculated. In this embodiment, the calculation is based on the amount of power supply E2 per unit time (T), such as 1 second, 30 minutes, or 1 hour, measured by the host meter 80. After calculating the amount of power TE2 during T1, proceed to step 7-4.

[0123] Next, in step 7-4, the amount of power TE4 during T1 is calculated. In this embodiment, the calculation is based on the amount of power supply E4 per unit time (T), such as 1 second, 30 minutes, or 1 hour, measured by the first lower level meter device 84A. After calculating the amount of power TE4 during T1, proceed to step 7-5.

[0124] Next, in step 7-5, the grid procurement rate γ, which is the procurement rate from the power grid 100 of the collective housing load 70a, is calculated. Specifically, the grid procurement rate γ is calculated by the following formula using the amount of power TE1 calculated in step 7-2, the amount of power TE2 calculated in step 7-3, and the amount of power TE4 calculated in step 7-4. γ = TE1 / (TE1+TE4-TE2) Once the grid procurement rate γ has been calculated, proceed to step 7-6.

[0125] Next, in step 7-6, the amount of electric power TE5a during T1 of each facility a is calculated. In this embodiment, the calculation is based on the amount of power supply E5a per unit time (T), such as 1 second, 30 minutes, or 1 hour, measured by the second lower level meter device 84B of each facility a. After calculating the amount of power TE5a during T1, proceed to step 7-7.

[0126] Next, in step 7-7, the amount of power TE1a supplied from the power grid 100 of each facility a during T1 is calculated. In this embodiment, the amount of power TE5a is calculated by multiplying the amount of power TE5a calculated in step 7-6 by the grid procurement rate γ calculated in step 7-5.

[0127] Next, in step 7-8, the amount of power TE4a supplied from the renewable energy power generation organization 20 to each facility a during T1 is calculated. In this embodiment, the amount of power TE4a is calculated by subtracting the amount of power TE1a by the grid procurement rate γ calculated in step 7-7 from the amount of power TE5a calculated in step 7-6.

[0128] Next, in step 7-9, first billing data D1, which is billing data for the electricity supplied from renewable energy power generation mechanism 20, is created. Specifically, it is created by multiplying the amount of power TE4a calculated in step 7-8 by the selling price F3 defined in the fourth regulation. After creating the first billing data D1, the process proceeds to step 7-10.

[0129] Next, in step 7-10, second billing data D2, which is billing data for the power supplied from the power system 100, is calculated. Specifically, it is created by multiplying the amount of power TE1a calculated in step 7-7 by the selling price F2 defined in the third agreement. After creating the second billing data D2, the process proceeds to step 7-11.

[0130] Next, in step 7-11, billing data D for T1 is generated. Specifically, the billing data D is generated by adding the second billing data D2 generated in step 7-10 to the first billing data D1 generated in step 7-9. Once the billing data D for the general room 31B has been created, the process returns to step 7-1.

[0131] In addition, in step 7-11, when creating the billing data D for the specific room 71A, one or both of the first billing data D1 and the second billing data D2 may be multiplied by a coefficient set so that the billing data D for the specific room 71A is cheaper than the billing data D for other facilities a.

[0132] Effects of the management support system 10 according to the second embodiment Next, the effects achieved by the management support system 10 of the second embodiment will be described. The management support system 10A of this embodiment can effectively utilize renewable energy in the housing load 70a of the housing complex 70 even if the renewable energy power generation mechanism 20 cannot be connected to the specific room 71A due to conditions such as the exterior shape of the housing complex 70. In addition, by setting the calculation method of the electricity usage fee to be charged for the specific room 71, whose rent is set lower than that of the other rooms 71 in the housing complex 70, to be lower than that of the other rooms 71, it is possible to support the securing of residents while keeping the rent for the specific room 71A higher.

[0133] The above describes a preferred embodiment of the present invention. However, it is possible to select and / or change the configurations described in the above embodiment to other configurations as appropriate without departing from the spirit of the present invention.

[0134] For example, in the above-described embodiment, the management support system 10 is used in an apartment building, but the present invention is not limited to this. The management support system 10 can be suitably used in other rental real estate having multiple facilities that are rented out. Examples of the facilities include facilities that can be used as rooms or shared facilities in the above-described embodiments, as well as facilities that can be used for purposes such as stores, offices, warehouses, garages, etc. In the above-described embodiment, the management support system 10 is used in the apartment building 70 that has concluded a low-voltage bulk electricity receiving contract, but the present invention is not limited to this. It can also be suitably used for rental real estate that has concluded a high-voltage bulk electricity receiving contract because it is expected that high-voltage electricity will be required due to a large number of facilities, etc.

[0135] In the above-described embodiment, the renewable energy power generation mechanism 20 has the solar power generation facility 21, but the present invention is not limited to this. The renewable energy power generation mechanism 20 is not limited to the solar power generation facility 21, and other known renewable energy power generation facilities such as wind power generation facilities can be suitably used. In addition, a plurality of types of renewable energy power generation equipment can be used. This may allow the specific room load 71a of the specific room 71A to receive electric power from the renewable energy power generation mechanism 20 in a stable manner.

[0136] Furthermore, in the above-described embodiment, a storage battery or an electric vehicle charger is given as an example of use for the first supply adjustment device 33 of the renewable energy supply adjustment mechanism 30, but the present invention is not limited to this. The first supply adjustment device 33 may be a water heater that stores hot water made by heating water using surplus electricity generated by the solar power generation equipment 21, or an ice maker that stores ice made by freezing water using surplus electricity generated by the solar power generation equipment 21. If such a water heater or ice maker uses AC power, power may be supplied via lower distribution board 85, as with specific room load 71a, or the distribution line from power conditioner 22 to lower distribution board 85 may branch off via a terminal block on the lower distribution board 85 side of measuring device 40, and power may be supplied via that branched distribution line. In addition, the hot water machine and ice maker may be installed inside the specific living room 71A or outside the specific living room 71A. If installed outside the specific living room 71A, it is preferable that they are installed so that only the resident of the specific living room 71A can use them.

[0137] In addition to a storage battery, the second supply adjustment device 34 may also be a charger for an electric vehicle, a water heater that stores hot water made by heating water using surplus electricity generated by the solar power generation equipment 21, or an ice maker that stores ice made by freezing water using surplus electricity generated by the solar power generation equipment 21.

[0138] In the above-described embodiment, the detection device 31 detects a forward power flow from the power system 100 side, but the present invention is not limited to this. The detection device 31 may detect a reverse power flow to the power system 100 side.

[0139] In the above embodiment, when the amount of power generated by the photovoltaic power generation facility 21 is below the amount of power consumed by the collective housing load 70a, the supply from the first supply adjustment device 33 is started (FIG. 3, S3-3), and then the supply from the second supply adjustment device 34 is started (FIG. 3, S3-5), but the present invention is not limited to this. When the amount of power generated by the photovoltaic power generation facility 21 is below the amount of power consumed by the collective housing load 70a, the first supply adjustment device 33 and the second supply adjustment device 34 may simultaneously supply power.

[0140] Furthermore, in the first embodiment, the renewable energy supply adjustment mechanism 30 has the second supply adjustment device 34, but the present invention is not limited to this. The renewable energy supply adjustment mechanism 30 does not have to have the second supply adjustment device 34. Even in this case, the first power adjustment device 33 can supply renewable energy to the apartment load 70a when the amount of power generated by the solar power generation facility 21 is lower than the amount of power consumed by the apartment load 70a.

[0141] In addition, in the first embodiment, the fourth regulation stored in the management device 60 defines the sales price F3 for the amount of electricity received by the room 71A from the electricity supplied from the renewable energy power generation mechanism 20, but the present invention is not limited to this. A sales price F3a for the amount of power received by the specific room 71A and a sales price F3b for the amount of power received by the general room 71B of the power supplied from the renewable energy power generation mechanism 20 may be set. In that case, it is preferable that the selling price F3a is lower than the selling price F3b. In other words, it is preferable that the selling price F1, the selling price F2, the selling price F3a, and the selling price F3b have the following relationship. Selling price F2 > Selling price F3b > Selling price F3a > Selling price F1

[0142] Furthermore, in the first embodiment, the management device 60 stores the first, second, third, and fourth rules for creating the billing data D, but the present invention is not limited to this. The management device 60 may also store a tolerance adjustment rate α, other costs β, and the like.

[0143] The tolerance adjustment rate α is used when creating the first billing data D1 required to create the billing data D. Specifically, as described above, the difference between the amount of power E6 output from the renewable energy power generation mechanism 20 and the amount of power supply E4 flowed back from the specific room 71A to the power grid 100 is calculated, and this difference is used to adjust the error. 4, in the first embodiment, in order to obtain the billing data D for the specific room 71A, in step 4-5 of the process of creating the billing data D for the specific room 71A performed by the management device 60, the difference between the electric energy TE6 obtained in step 4-2 and the electric energy TE4 obtained in step 4-3 is obtained, and the difference is multiplied by the selling price F3 set forth in the fourth regulation to create the first billing data D1. On the other hand, if the tolerance adjustment rate α is recorded in the management device 60, the tolerance adjustment rate α can be further multiplied to create the first billing data D1 as follows. The same is true when obtaining the billing data D for the general room 71B. D1 = (TE6-TE4) x F3 x α

[0144] Other costs β include a renewable energy generation promotion levy, a fuel cost adjustment amount, a flat rate based on the contract capacity, which is the maximum amount of electricity that can be used simultaneously under a contract concluded between the bulk electricity receiving business and the resident of each room, and fees based on the payment method, such as a document issuance fee charged when sending a transfer slip or a document listing the amount of electricity used and the bill to residents who pay their electricity bill by transfer slip.

[0145] One or more of the other costs β described above are used when determining the billing data D together with the first billing data D1 and the second billing data D2. That is, in the first embodiment, as shown in Fig. 4, in order to obtain the billing data D for the specific room 71A, in step 4-7 of the process of creating the billing data D performed by the management device 60, the second billing data D2 created in step S4-6 is added to the first billing data D1 created in step S4-5 to create the billing data D for T1. On the other hand, if other costs β are recorded in the management device 60, in step 4-7, the second billing data D2 created in step S4-6 and the other costs β can be added to the first billing data D1 created in step S4-5 to create the billing data D as follows: The same is true when obtaining the billing data D for the general room 71B. D = D1 + D2 + β

[0146] 2, the solar module 21a constituting the solar power generation facility 21 is used in a state where it is installed on the roof of the apartment house 70, but the present invention is not limited to this. The solar module 21a may be installed in the garden of the apartment house 70 or outside the premises of the apartment house 70. [Explanation of symbols]

[0147] 10 Management Support System 20. Renewable Energy Generation Organization 30 Renewable Energy Supply Adjustment Agency 40 Measuring Equipment 50 Control device 60 Management device 70 Apartment complex 80 Power supply mechanism 100 Power system

Claims

1. Multiple facilities and In order to supply collectively received power to the plurality of facilities, a centralized power receiving board, a higher-level distribution board to which power is supplied from a power system by the centralized power receiving board, and a lower-level distribution board installed at each of the plurality of facilities and to which power is supplied from the higher-level distribution board, a load connector for supplying power to a load in the room to which power is supplied from a power system by the lower level distribution board; A management support system for use in rental real estate comprising: a renewable energy power generation organization having renewable energy power generation facilities; A control device that controls the renewable energy power generation mechanism; an upper level meter device that is provided between the power grid and the centralized power receiving panel and detects an amount of received power E1 that the rental property receives from the power grid and an amount of supplied power E2 that the renewable energy power generation mechanism sells to the power grid; A first lower-level meter device is installed in at least one of the facilities and detects an amount of received power E3 received from the power grid side and an amount of supplied power E4 that is reverse-flowed from the renewable energy power generation mechanism to the power grid side; A measuring device for detecting an amount of power E6 output by the renewable energy power generation mechanism; having A management support system, characterized in that the renewable energy power generation organization is connected to a specific distribution line that connects the first lower-level meter device and the load connector of the facility in which the first lower-level meter device is installed.

2. The facility in which the first lower level meter device is installed is a specific facility that allows renewable energy to be used preferentially over other facilities, A renewable energy supply adjustment mechanism is provided that, when the total amount of renewable energy used by the specific facility and other facilities falls below the amount of renewable energy generated by the renewable energy power generation equipment, stores the surplus, and when the total amount of renewable energy used by the specific facility and other facilities exceeds the amount of renewable energy generated by the renewable energy power generation equipment, adjusts the amount of renewable energy to be supplied to the facilities other than the specific facility; The management support system according to claim 1 , wherein the renewable energy supply adjustment mechanism is connected to a specific power distribution line of the specific facility.

3. The facility in which the first lower level meter device is installed is a facility other than a specific facility that allows renewable energy to be used preferentially over other facilities, The control device outputs information on the received power amount E1, the fed power amount E2, and the supplied power amount E4 to a management device that records a second rule that determines a selling price F2 for the amount of power received by the facility from the power grid and a fourth rule that determines a selling price F3 for the amount of power received by the specific room from the renewable energy power generation mechanism, The management device calculates a grid procurement rate γ, which is a procurement rate from the power grid 100, using the following formula based on information on the received power amount E1, the fed power amount E2, and the supplied power amount E4:

2. The management support system according to claim 1, further comprising: a step of generating billing data for said specific facility. γ=TE1 / (TE1+TE4-TE2)

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