Power supply system and power supply method

Abstract

To provide a power supply system that meets various power needs for each resident of each dwelling unit in a multiple dwelling house.SOLUTION: A power supply system 100 includes: a collective power reception board configured to receive power from a system; a first distribution board configured to supply the power, collectively received by the collective power reception board, to a plurality of dwelling units and shared units; a distributed power source provided between the collective power reception board and the first distribution board and including a power generation device using renewable energy; and a first control device configured to control the distributed power source. Each of the plurality of dwelling units and shared units includes: a connection point to which a storage battery as a secondary battery can be connected; a second distribution board configured to supply the power, supplied from the first distribution board, to a household load and the secondary battery connected to the connection point; and a second control device that controls charging and discharging of the secondary battery connected to the connection point. The secondary battery is charged with electric power supplied from the second distribution board by the second control device, and electric power discharged from the secondary battery is supplied to the household load via the second distribution board.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a power supply system and a power supply method. [Background technology]

[0002] Conventionally, a system has been known in which an entire housing complex enters into a collective power receiving contract and distributes the received power to each dwelling unit. Patent Document 1 discloses a power supply system that realizes a reduction in electricity charges when a low-voltage collective power receiving contract is made. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-017779 A Summary of the Invention [Problem to be solved by the invention]

[0004] According to the technology described in Patent Document 1, power supply is managed centrally for the entire apartment complex, making it possible to optimize operation on an apartment complex basis. However, it is difficult to meet the diverse power storage and consumption needs of each resident in each unit.

[0005] Therefore, one of the objects of the present invention is to provide a power supply system and a power supply method that can meet the diverse power needs of each resident in each dwelling unit, even in the case of a collective power reception in an apartment building. [Means for solving the problem]

[0006] One embodiment of the power supply system of the present invention is a power supply system for an apartment building having a plurality of dwelling units and a common area, and includes a centralized receiving board that receives power from a grid, a first distribution board that supplies the power received by the centralized receiving board to the plurality of dwelling units and the common area, a distributed power source including a renewable energy power generation device provided between the centralized receiving board and the first distribution board, and a first control device that controls the distributed power source, and each of the plurality of dwelling units and the common area has a connection point to which a secondary battery can be connected, a second distribution board that can supply power supplied from the first distribution board to household loads and a secondary battery connected to the connection point, and a second control device that controls charging and discharging of the secondary battery connected to the connection point, wherein the secondary battery is charged by power supplied from the second distribution board, and power discharged from the secondary battery is supplied to the household loads via the second distribution board. Effect of the Invention

[0007] According to the present invention, it is possible to provide a power supply system and a power supply method that can meet the diverse power needs of each resident in each dwelling unit, even in the case of collective power reception in an apartment building. [Brief description of the drawings]

[0008] [Figure 1] 1 is a diagram illustrating an example of an overview of a power supply system according to a first embodiment of the present invention; [Diagram 2] 1 is a flowchart illustrating an example of the operation of a power supply system according to one embodiment of the present invention. [Diagram 3] FIG. 11 is a diagram illustrating an example of an overview of a power supply system according to a second embodiment of the present invention. [Figure 4] 1 is a flowchart illustrating an example of the operation of a power supply system according to one embodiment of the present invention. [Diagram 5] FIG. 13 is a diagram illustrating an example of an overview of a power supply system according to a third embodiment of the present invention. [Figure 6] 1 is a flowchart illustrating an example of the operation of a power supply system according to one embodiment of the present invention. [Figure 7] FIG. 13 is a diagram illustrating an example of an overview of a power supply system according to a fourth embodiment of the present invention. [Figure 8] 1 is a flowchart illustrating an example of the operation of a power supply system according to one embodiment of the present invention. [Figure 9] FIG. 1 is a diagram illustrating an overview of a power supply system according to an embodiment of the present invention. [Figure 10] FIG. 13 is a diagram illustrating an example of an overview of a power supply system according to a fifth embodiment of the present invention. [Figure 11] 1 is a flowchart illustrating an example of the operation of a power supply system according to one embodiment of the present invention. [Figure 12] FIG. 13 is a diagram illustrating an example of an overview of a power supply system according to a sixth embodiment of the present invention. [Figure 13] FIG. 13 is a diagram illustrating an example of an overview of a power supply system according to a seventh embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] In the present disclosure, the power supply system 100 is a system that supplies power in an apartment house having a plurality of dwelling units and a common area. In the present disclosure, the apartment house receives a predetermined amount of power in a lump sum from an electric power supply company. At this time, the power lump sum receiving contract may be a high-voltage lump sum receiving contract or a low-voltage lump sum receiving contract. In the present disclosure, the power supply system 100 is mainly described as a power supply system in an apartment house, but the scope of application of the present invention is not limited thereto, and may be other consumer facilities that receive power in a lump sum. The consumer facilities are facilities that receive and use the supply of power, and examples of such facilities include hospitals, schools, police stations, nursing homes, nurseries, sports centers, and facilities for the disabled. The common areas are areas that are shared by the residents of the apartment house, and examples of such facilities include elevators, corridors, stairs, and management offices.

[0010] [First embodiment] An overview of a power supply system 100 according to a first embodiment of the present invention will be described with reference to Fig. 1. The power supply system 100 has a first meter device 1, a centralized power receiving board 2, a distributed power source 3, a first distribution board 4, a second distribution board 6 (sometimes referred to as an in-house distribution board), an in-house load 7, a second control device 8, and a first control device 9, and is configured so that a storage battery 10 can be connected to each dwelling unit and a common area. In Fig. 1, solid lines indicate distribution lines that distribute power, and dashed lines indicate control lines that transmit control signals, measurement data, and the like. The control lines may be wired or wireless.

[0011] The first meter device 1 measures the amount of power supplied from the grid. For example, it is a watthour meter for measuring the amount of power provided by an electric power company. A watthour meter with a communication function, such as a smart meter, may also be used. The first meter device 1 is installed upstream of the centralized power receiving panel 2, i.e., on the grid side, and is connected to the first control device 9 by a control line. The grid is a system that includes various facilities for supplying power from a power plant to an apartment building, and includes power transmission lines, substation facilities, and a power distribution network.

[0012] The centralized power receiving board 2 supplies the power collectively received from the system to the first distribution board 4.

[0013] The distributed power source 3 includes a power generation device using renewable energy, and supplies power to the home load 7 and the storage battery 10 via the first distribution board 4 and the second distribution board 6, functioning as a power source different from the grid. The power generation device using renewable energy is preferably a solar power generation device, but does not necessarily have to be a solar power generation device, and may be, for example, a wind power generation device or a small-to-medium-sized hydroelectric power generation device. The distributed power source 3 is installed between the centralized power receiving board 2 and the first distribution board 4, and is connected to the first control device 9 by a control line. The distributed power source 3 is installed inside the apartment building, and the power using renewable energy generated by the power generation device included in the distributed power source 3 is supplied to the home load 7 and the storage battery 10 via the first distribution board 4 and the second distribution board 6 as the privately generated power of the apartment building. The distributed power source 3 may further include a storage battery.

[0014] The first distribution board 4 supplies the power collectively received by the central power receiving board 2 and / or the power supplied from the distributed power sources 3 to a plurality of dwelling units and a common area via a plurality of second meter devices 5.

[0015] The second meter device 5 measures the amount of power derived from the grid and / or the amount of power derived from the distributed power source 3, which is supplied to the domestic loads 7 via the second distribution board 6 in each dwelling unit and the common area. The second meter device 5 is connected to the first control device 9 by a control line.

[0016] The second distribution board 6 supplies the power supplied from the first distribution board 4 to the household loads 7 and the storage battery 10. The second distribution board 6 is provided inside the apartment building, and is provided corresponding to each of the dwelling units and the common area.

[0017] The domestic load 7 consumes the power supplied from the second distribution board 6. For example, the domestic load 7 is equipment or devices that consume power, such as air conditioners, microwave ovens, refrigerators, televisions, routers, and lighting, that are used in each dwelling unit or in a common area.

[0018] The second control device 8 executes various control processes by a control unit including a processor or the like that executes a program that defines the procedures of various control processes, and controls charging and discharging of the storage battery 10. The program that defines the procedures of various control processes is stored in a storage unit of the second control device 8 or an external storage medium. An example of the second control device 8 is a Home Energy Management System (HEMS). The second control device 8 is capable of controlling the storage battery 10. The second control device 8 is also connected to the first control device 9 by a control line. The second control device 8 is provided inside the apartment building, and is provided corresponding to each of the dwelling units and the common area. For example, the second control device 8 is provided in a place in the room of each dwelling unit or in the common area where it can be operated by the resident or the owner.

[0019] The first control device 9 executes various control processes by a control unit including a processor or the like that executes a program that defines the procedures of various control processes, controls the supply of power from the distributed power source 3, and controls the charging and discharging of the storage battery 10 through the control of the second control device 8. The program that defines the procedures of various control processes is stored in a storage unit of the first control device 9 or an external storage medium. An example of the first control device 9 is a HEMS. The first control device 9 is connected to the first meter device 1, the distributed power source 3, the second meter device 5, and the second control device 8, and controls these devices. The first control device 9 is provided inside the apartment building, and one first control device 9 is provided corresponding to one apartment building.

[0020] The storage battery 10 is a battery that can be used repeatedly by charging, and is an example of a secondary battery. A secondary battery is also called a rechargeable battery. In the present disclosure, the terms "charging" and "storage" may be used interchangeably. The storage battery 10 supplies power to the household loads 7 via the second distribution board 6, and functions as a power source different from the grid and the distributed power source 3. The charging and discharging of the storage battery 10 is controlled by the second control device 8. The storage battery 10 is charged by the power supplied from the second distribution board 6, and the power discharged from the storage battery 10 is supplied to the household loads 7 via the second distribution board 6. The storage battery 10 can be connected to each dwelling unit and common area, and can be connected to the apartment building from the outside. The storage battery 10 is connected to the second distribution board 6 directly or via a connection point (not shown) by a distribution line, and is connected to the second control device 8 by a control line.

[0021] [Operation of the first embodiment] Next, an example of the operation of the power supply system according to one aspect of the present invention will be described with reference to Fig. 2. The power supply system 100 collectively receives power from a grid through the centralized power receiving board 2 (step S101). The power supply system 100 supplies the power collectively received through the centralized power receiving board 2 and / or the power supplied from the distributed power source 3 to a plurality of dwelling units and a common area through the first distribution board 4 (step S102). The power supply system 100 supplies the power supplied from the first distribution board 4 to the storage battery 10 and the household load 7 through the second distribution board 6 (step S103). The power supply system 100 controls the charging and discharging of the storage battery 10 through the second control device 8 and / or the first control device 9 (step S104).

[0022] In the first embodiment, the second control device 8 may receive instructions from a resident and / or an owner of each dwelling unit regarding charging and discharging of the storage battery 10, and control the charging and discharging of the storage battery 10. For example, when a resident inputs an instruction regarding discharging of the storage battery 10 through the operation of the second control device 8 provided in a room of the dwelling unit, the second control device 8 receives the instruction and controls the charging of the storage battery 10 based on the content of the instruction. This allows the resident or the owner to select the timing of charging and discharging the storage battery 10 by themselves.

[0023] The first control device 9 may be configured to detect the supply of power from the distributed power source 3. For example, the first control device 9 detects the supply of power from the distributed power source 3 based on renewable energy, and controls the second control device 8 to charge the storage battery 10 based on the amount of power supply from the distributed power source 3. This allows the occupants or the owner to store inexpensive power derived from renewable energy.

[0024] The power supply system 100 may have a meter device 30 for a distributed power source that measures the amount of power supplied from the distributed power source 3, and the meter device 30 for the distributed power source may measure the amount of power supplied from the distributed power source 3, and the first control device 9 may acquire information regarding the amount of power. The distributed power source meter device 30 is connected to the distributed power source 3 by a power distribution line, and is connected to the first control device 9 by a control line. Furthermore, the first control device 9 may notify the second control device 8 of the dwelling unit and / or common area of ​​the amount of power supplied from the distributed power source 3, obtained from the distributed power source meter device 30, so that the resident and / or owner can recognize the amount of power supplied from the distributed power source 3. This allows the resident and owner to add self-generated power using inexpensive renewable energy as an option when selecting the timing to charge the storage battery 10.

[0025] [Second embodiment] Next, a second embodiment of the power supply system according to the present invention will be described with reference to FIG. 3. The power supply system 100 may have a connection point to which a secondary battery can be connected, and may be configured to be able to connect the secondary battery via the connection point. The connection point functions as an interface connecting the second distribution board 6 and the secondary battery, etc. The connection point is connected to the secondary battery and the second distribution board by a power distribution line, and is connected to the secondary battery and the second control device 8 by a control line. In the example of FIG. 3, the power supply system 100 has an EV (Electronic Vehicle, electric automobile) charger / discharger 11 functioning as a connection point, and is configured to be able to connect an EV 12 functioning as a secondary battery via the EV charger / discharger 11. The EV charger / discharger 11 is an example of a connection point, and the EV 12 is an example of a secondary battery. The EV 12 can be used as a power source different from the grid or the distributed power source 3, as in the case of the storage battery 10. The charging and discharging of the EV 12 is controlled by the second control device 8 via the EV charger / discharger 11. EV 12 is charged and discharged by receiving power from the second distribution board 6, in the same manner as the storage battery 10, and the power discharged from EV 12 is supplied to the domestic loads 7 via the EV charger / discharger 11 and the second distribution board 6.

[0026] The distributed power source 3 may include a power generation meter device that measures the amount of power generated by the distributed power source 3. The first control device 9 may also acquire information regarding the amount of power generated. Furthermore, the first control device 9 may notify the amount of power generated to the second control device 8 of each dwelling unit and / or common area so that the resident and / or owner can recognize the amount of power generated by the distributed power source 3. This allows the resident and owner to select the timing and amount of charging and discharging of the storage battery 10 after recognizing the amount of power generated in-house by renewable energy.

[0027] [Operation of the second embodiment] Next, an example of the operation of the power supply system according to the second embodiment will be described with reference to Fig. 4. The power supply system 100 detects power supply from the distributed power sources 3 by the first control device 9 (step S201), and acquires the amount of power generated by the distributed power sources 3 measured by the power generation meter device of the distributed power sources 3 (step S202). The power supply system 100 notifies each dwelling unit of the amount of power generated by the distributed power sources 3 by the first control device 9 (step S203). The power supply system 100 receives instructions from the resident and / or the owner regarding the charging and discharging of the EVs 12 by the second control device 8 (step S204). The power supply system 100 controls the charging and discharging of the EVs 12 based on the instructions from the resident and / or the owner by the second control device 8 (step S205).

[0028] [Third embodiment] Next, a third embodiment of the power supply system according to the present invention will be described with reference to Fig. 5. Power supply system 100 can control charging and discharging of EVs 12 by first control device 9, and can respond to demand response (DR) from the outside. In the example of Fig. 5, power supply system 100 has EV charger / discharger 11, and is configured to be connectable to EVs 12 via EV charger / discharger 11. EVs 12 are connected to each dwelling unit and common area via EV charger / discharger 11, and are connected to the apartment building from the outside.

[0029] The first control device 9 may receive a signal related to the DR instruction from a DR instruction side such as an aggregator or a retail electricity supplier. The second control device 8 may receive a signal related to the DR instruction from the first control device 9 and control charging and discharging of the EV 12 connected to the EV charger / discharger 11 based on the DR instruction. For example, when a signal related to the DR instruction is transmitted from a DR instruction side such as an aggregator or a retail electricity supplier, the first control device 9 receives the signal related to the DR instruction (a101), and controls the EV 12 connected to the EV charger / discharger 11 to be charged or discharged based on the DR instruction through the control of the second control device 8 (a102). The second control device 8 receives an instruction from the first control device 9 requesting charging and discharging from the EV, and controls the EV 12 connected to the EV charger / discharger 11 to be charged or discharged (a103). When discharging is performed, the power discharged from the EV 12 connected to the EV charger / discharger 11 is supplied to the domestic load 7 via the second distribution board 6 (a104). When charging is performed, the EV 12 connected to the EV charger / discharger 11 is charged. This allows the first control device 9 to control the charging and discharging of the EVs 12, making DR possible from the outside.

[0030] The first control device 9 may acquire information on DR compliance, including information on the amount of power supplied from the grid, information on the amount of power supplied from the distributed power sources 3, information on the amount of power charged and discharged from the secondary battery, and / or information on the amount of power consumed by the household loads 7 of each dwelling unit and common area. The first control device 9 may generate information on the DR compliance performance of each dwelling unit and common area based on the acquired information on the predetermined amount of power. For example, adjustment may be performed based on the relationship between the acquired predetermined amounts of power. The first control device 9 may also notify the DR instruction side, such as an aggregator or a retail electricity supplier, of the generated information on the DR compliance performance of each dwelling unit and common area (a105). This allows the resident or owner to receive an incentive according to the DR compliance performance of each dwelling unit and common area (a106).

[0031] [Operation of the third embodiment] Next, an example of the operation of the power supply system according to the third embodiment will be described with reference to FIG. 6. The power supply system 100 receives a signal related to a DR instruction from a DR instruction side such as an aggregator or a retail electricity supplier through the first control device 9 (step S301). The power supply system 100 controls the EV 12 connected to the EV charger / discharger 11 to discharge the EV 12 through the control of the second control device 8 based on the DR instruction (step S302). The power supply system 100 acquires information related to DR compliance including information on the amount of power supplied from the grid, information on the amount of power supplied from the distributed power source 3, information on the amount of power charged and discharged from the secondary battery, and / or information on the amount of power consumed by the household load 7 of each dwelling unit and common area through the first control device 9 (step S303). The power supply system 100 generates information related to DR compliance performance based on the acquired information on DR compliance through the first control device 9 (step S304). The power supply system 100 notifies the DR instruction side, such as an aggregator or a retail electricity business, of information on the DR response performance by the first control device 9 (step S305).

[0032] [Fourth embodiment] Next, a fourth embodiment of the power supply system according to the present invention will be described with reference to Fig. 7. The power supply system 100 can also support DR by causing a reverse power flow to supply power to the grid. In the example of Fig. 7, the power supply system 100 can support DR by supplying power to the grid based on a signal related to a DR instruction received by the first control device 9 from a DR instruction side such as an aggregator or an electricity retailer. In the example of Fig. 7, the power supply system 100 has an EV charger / discharger 11, and is configured to be able to connect an EV 12 via the EV charger / discharger 11.

[0033] The first control device 9 may control the reverse power flow that supplies power to the grid by the power supply system 100. For example, when a signal related to a DR instruction is transmitted from a DR instruction side such as an aggregator or a retail electricity supplier, the first control device 9 receives the signal related to the DR instruction (a201), and based on the DR instruction, the first control device 9 controls the second control device 8 to discharge the EVs 12 connected thereto at once (a202 and a203), and the EVs 12 discharge power (a204). The first control device 9 controls the reverse power flow that supplies surplus power, including power discharged from the EVs 12 present in the power supply system 100 and power supplied from the distributed power sources 3, to the grid (a205). This allows the resident or owner to receive an incentive according to the DR compliance performance by generating a reverse power flow using the secondary batteries connected to each dwelling unit and common area (a206).

[0034] The first control device 9 may acquire information on the amount of power to be reversely flowed, which is the amount of power supplied from the power supply system 100 to the grid when reverse flow is performed, measured by the first meter device 1. The first control device 9 may also notify a DR instruction side, such as an aggregator or a retail electricity supplier, of the amount of power to be reversely flowed acquired from the first meter device 1 as a DR compliance record using the secondary batteries connected to each dwelling unit and common area. This allows the resident or owner to receive an incentive according to the DR compliance record using the secondary batteries connected to each dwelling unit and common area.

[0035] The first meter device 1 may measure the amount of power to be reversely flowed, which is the amount of power supplied from the power supply system 100 to the grid when reverse flow is performed, and the first control device 9 may acquire information on the amount of power to be reversely flowed measured by the first meter device 1. The first control device 9 may also notify the amount of power to be reversely flowed when notifying the DR instruction side, such as an aggregator or a retail electricity supplier, of the DR response performance. This allows the resident or owner of each dwelling unit to receive an incentive according to the DR response performance using the secondary battery connected to each dwelling unit and common area. The resident or owner may also receive the incentive according to each DR response performance via a rental management company or a management company of an apartment building.

[0036] [Operation of the fourth embodiment] Next, an example of the operation of the power supply system according to the fourth embodiment will be described with reference to FIG. 8. The power supply system 100 receives a signal related to a DR instruction from a DR instruction side such as an aggregator or a retail electricity supplier through the first control device 9 (step S401). The power supply system 100 controls the second control device 8 to discharge the EV 12 connected to the EV charger / discharger 11 based on the DR instruction (step S402). The discharged power from the EV 12 is supplied (step S403). The power supply system 100 controls the first control device 9 to perform a reverse power flow to supply surplus power, including power discharged from the EV 12 present in the power supply system 100 and power supplied from the distributed power source 3, to the grid (step S404). The power supply system 100 notifies the DR instruction side such as an aggregator or a retail electricity supplier of information related to the DR response performance of each dwelling unit through the first control device 9 (step S405).

[0037] [Fifth embodiment] Next, a fifth embodiment of the power supply system according to the present invention will be described with reference to Fig. 10. The power supply system 100 allows a secondary battery to be connected from outside, so that power from the secondary battery can be used during a power outage such as a disaster. In the example of Fig. 7, the power supply system 100 has an EV charger / discharger 11, and is configured to allow an EV 12 to be connected via the EV charger / discharger 11. The EVs 12 are connected to each of the dwelling units and common areas via the EV charger / discharger 11, and are connected to the apartment building from outside.

[0038] The first control device 9 may detect the occurrence of a power outage. For example, the first control device 9 detects the occurrence of a power outage by periodically acquiring and monitoring the amount of power supplied from the grid measured by the first meter device 1. For example, the first control device 9 detects the occurrence of a power outage by detecting the activation of various backup power sources equipped in the apartment building. For example, the first control device 9 detects the occurrence of a power outage by detecting the interruption of the Internet connection. For example, the first control device 9 detects the occurrence of a power outage by detecting the interruption of real-time communication from the smart meter as the first meter device 1. In addition, when the first control device 9 detects the occurrence of a power outage, the first control device 9 may control the second control device 8 to discharge the EV 12 connected to the EV charger / discharger 11. For example, when the first control device 9 detects the occurrence of a power outage, the first control device 9 notifies the second control device 8 of the occurrence of the power outage and causes the EV 12 connected to the EV charger / discharger 11 to discharge. This allows the use of external power from the EV 12 connected to the EV charger / discharger 11 in each dwelling unit and the common area during a power outage due to a disaster or the like.

[0039] [Operation of the fifth embodiment] Next, an example of the operation of the power supply system according to the fourth embodiment will be described with reference to Fig. 11. The power supply system 100 detects the occurrence of a power outage by the first meter device 1 and / or the first control device 9 (step S501). The power supply system 100 notifies each dwelling unit and the common area of ​​the occurrence of the power outage by the first control device 9 (step S502). The power supply system 100 causes the EV 12 connected to the EV charger / discharger 11 to discharge electricity by the first control device 9 through the control of the second control device 8 (step S503).

[0040] [Sixth embodiment] Next, a sixth embodiment of the power supply system according to the present invention will be described with reference to Fig. 12. The power supply system 100 may be configured to be connectable to a portable storage battery 13 instead of the storage battery 10. In the example of Fig. 12, the power supply system 100 is configured to be connectable to the portable storage battery 13. Examples of the portable storage battery 13 include a portable storage battery, a portable power source, a portable solar power generator equipped with a solar power generation device, and a portable electric vehicle (PEV: Portable Electronic Vehicles) equipped with a portable battery. The portable storage battery 13 is connected to each dwelling unit and common area, and is connected to the apartment building from the outside.

[0041] [Seventh embodiment] Next, a seventh embodiment of the power supply system according to the present invention will be described with reference to Fig. 13. The first control device 9 and a connection point to which a secondary battery can be connected may be directly connected by a control line, and charging and discharging of the secondary battery may be directly controlled by the first control device 9. In the example of Fig. 13, the first control device 9 and an EV charger / discharger 11 are directly connected by a control line, and charging and discharging of an EV 12 can be directly controlled by the first control device 9. In one aspect, it is also possible to perform collective control of the secondary batteries.

[0042] [Variation 1] The connection point may have a power storage function. For example, when the connection point is an EV charger / discharger 11, the EV charger / discharger 11 may have a storage battery. This makes it possible to store power supplied from a secondary battery connected to the connection point in the connection point.

[0043] [Variation 2] The distributed power sources 3 may be provided with a power storage function. For example, the distributed power sources 3 may have a storage battery. Furthermore, the first control device 9 may be capable of controlling the charging and discharging of the storage battery included in the distributed power sources 3. This makes it possible, in one embodiment, to support DR, including controlling the charging and discharging of the distributed power sources 3. Furthermore, in one embodiment, it becomes possible to store power supplied from a secondary battery in the distributed power sources.

[0044] [Variation 3] The connection point may be configured to be further connectable to a power generation device using renewable energy, such as a solar power generation device. The connection point may also be equipped with a power generation meter device that measures the amount of power generated by the power generation device connected to the connection point. The connection point may also have a smart charger / discharger that controls the charging / discharging speed according to the power demand of each dwelling unit and common area and the availability of privately generated power, such as solar power generation. This makes it possible to realize optimal charging / discharging according to the power demand of each dwelling unit and common area.

[0045] [Variation 4] In the power supply system 100, the EV charger / discharger 11 may be equipped with a V2H (Vehicle-to-Home) system or a V2G (Vehicle-to-Grid) system. By providing the V2H system, power discharged from the EV 12 is supplied to the domestic loads 7 via the EV charger / discharger 11 and the second distribution board 6. By providing the V2G system, power discharged from the EV 12 can be reverse-flowed to the grid.

[0046] [Variation 5] The power supply system 100 may use the EV charger / discharger 11 in the form of an EV stand including a plurality of EV chargers / dischargers. The EV stand may be called an EV station or a charging / discharging station.

[0047] [Variation 6] In the above-described embodiments, the secondary battery has been described as being the storage battery 10, the EV 12, or the portable storage battery 13. However, the secondary battery may also be, in addition to these, a battery electric vehicle (BEV), a plug-in hybrid vehicle (PHV), a fuel cell vehicle (FCV), a stationary storage battery, or the like.

[0048] [Variation 7] In the above-described embodiments, the power supply system 100 is configured to be connectable to the storage battery 10 (first embodiment), the power supply system 100 has an EV charger / discharger 11 and is configured to be connectable to the EV 12 (second, third, fourth, fifth, and seventh embodiments), and the power supply system 100 is configured to be connectable to a portable storage battery 13 instead of the storage battery 10 (sixth embodiment) have been described, but the embodiments of the present disclosure are not limited to these as long as the power supply system 100 is configured to be connectable to at least one secondary battery as a power source different from the grid and the distributed power source 3 in the dwelling unit and / or common area. The specific secondary battery described in each embodiment can be replaced with another secondary battery within the scope of no contradiction. In addition, in the above-mentioned embodiment and the referred drawings, it has been described that one secondary battery is configured to be connectable to one dwelling unit, but it is not necessarily required that one secondary battery is configured to be connectable to one dwelling unit, and multiple secondary batteries may be configured to be connectable to one dwelling unit. The secondary batteries may be configured so that one type of secondary battery can be connected to one dwelling unit, or two or more types of secondary batteries can be connected to one dwelling unit. Furthermore, the power supply system 100 and the secondary battery may be directly connected by a power distribution line, or may be connected via a connection point to which the secondary battery can be connected. For example, the power supply system 100 may have a connection point to which the storage battery 10 can be connected, and may be configured to be connectable to the storage battery 10 via the connection point. The power supply system 100 may be configured to be connectable to the storage battery 10 and the portable storage battery 13. The power supply system 100 may be configured to be connectable to the storage battery 10, and may have an EV charger / discharger 11, and may be configured to be connectable to an EV 12 via the EV charger / discharger 11.

[0049] [Variation 8] In the above-mentioned embodiment, the secondary battery of the storage battery 10, the EV 12, or the portable storage battery 13 is described as being configured to be connectable to each of the dwelling units and the common area, but the secondary battery does not necessarily need to be configured to be connectable to each of the dwelling units and the common area, and may be configured to be connectable only to some desired dwelling units, may be configured to be connectable for shared use by a plurality of dwelling units, or may be configured to be connectable for use by guests other than the residents or the owner. For example, the EV 12 may be configured to be connectable to the contracted section of each dwelling unit, or may be configured to be connectable to a car wash or a parking lot for visitors in an apartment building. In addition, in the present disclosure, the secondary battery may be connected to each dwelling unit and / or the common area inside the house, or may be connected to each dwelling unit and / or the common area outside the house.

[0050] [Variation 9] In the above embodiment, the power supply system 100 has been described as having the first meter device 1 and the second meter device 5, but these are not necessarily required, and the centralized power receiving board 2 may be directly connected to the grid, and the first distribution board 4 and the second distribution board 6 may be directly connected. Also, in the above embodiment, the second meter device 5 has been described as being connected to the first distribution board 4 and the second distribution board 6, but the second meter device 5 may be further connected to the storage battery 10, the EV charger / discharger 11, or the portable storage battery 13 to measure the amount of power charged and discharged by the storage battery 10, the EV charger / discharger 11, or the portable storage battery 13.

[0051] [Variation 10] In the above embodiment, the power supply system 100 has been described as having the meter device 30 for distributed power sources that measures the amount of power supplied from the distributed power sources 3, but measurement is not necessarily required to be performed by the meter device 30 for distributed power sources, and the distributed power sources 3 may include an electricity generation meter device that measures the amount of power generated by the distributed power sources 3. The power supply system 100 may calculate the amount of power supplied from the distributed power sources 3 based on the amount of power generated by the distributed power sources 3 measured by the electricity generation meter device. The amount of power generated by the distributed power sources 3 measured by an electricity generation meter device included in the distributed power sources 3 may be taken as the amount of power supplied from the distributed power sources 3.

[0052] [Variation 11] The power supply system 100 may have a domestic load power consumption meter device that measures the amount of power consumed by the domestic load 7. The domestic load power consumption meter device may be connected to the second distribution board 6 by a distribution line, or may be included in the domestic load 7. The domestic load power consumption meter device may be connected to the second control device 8 by a control line, or may be connected to the first control device 9 by a control line. The second control device 8 may obtain information on the amount of power consumed by the domestic load 7 measured by the domestic load power consumption meter device, and notify the first control device 9. This makes it possible to calculate the DR compliance performance for each dwelling unit that reflects the amount of power consumed by the domestic load 7 of each dwelling unit. The power supply system 100 may have a charge / discharge meter device that measures the amount of power charged and discharged from the secondary battery connected to the connection point. The charge / discharge meter device may be connected to the second distribution board by a distribution line, may be configured to be connectable to the connection point, or may be included in the connection point. The charge / discharge meter device may be connected to the second control device 8 by a control line, or may be connected to the first control device 9 by a control line. The second control device 8 may obtain information on the amount of power charged and discharged from the secondary battery measured by the charge / discharge meter device, and notify the first control device 9 of the information. This makes it possible to calculate the DR compliance performance for each dwelling unit that reflects the amount of power charged and discharged from the secondary battery.

[0053] [Variation 12] In the above-described embodiment, the distributed power source 3 is installed inside the apartment building, and the electricity from renewable energy generated by the distributed power source 3 is supplied as self-generated electricity for the apartment building. However, it does not necessarily have to be installed inside the apartment building or supplied as self-generated electricity for the apartment building, and it may be installed outside the apartment building.

[0054] [Variation 13] In the above-described embodiment, the second control device 8 is described as being installed inside the apartment building and corresponding to each dwelling unit and common area, but it does not necessarily have to be installed inside the apartment building or corresponding to each dwelling unit and common area, and may be installed only in some desired dwelling units, or may be installed for shared use by multiple dwelling units, or may be installed for use by guests other than residents or the owner.

[0055] [Variation 14] In the above embodiment, the first control device 9 is provided inside the apartment building, and one first control device 9 is provided for one apartment building, but it is not necessarily required that the first control device 9 is provided inside the apartment building or that one first control device 9 is provided for one apartment building, and the first control device 9 may be provided outside the apartment building, or a plurality of first control devices 9 corresponding to a plurality of dwelling units may be provided for one apartment building. A server device inside or outside the apartment building may be used as the first control device 9.

[0056] [Variation 15] In the above embodiment, it has been described that the first control device 9 controls the supply of power from the distributed power source 3, but the supply of power from the distributed power source 3 does not necessarily have to be caused by control by the first control device 9. For example, the supply of power may be automatically performed when the amount of power generated by the distributed power source 3 reaches a certain value.

[0057] [Variation 16] The second control device 8 may acquire information about the DR instruction from the first control device 9, and manage the charging and discharging schedule of the EV 12 connected to the EV connection stand 11 in each dwelling unit and common area based on the DR instruction. This can promote the creation of DR response records for each dwelling unit and common area.

[0058] [Variation 17] When the first control device 9 receives a signal regarding a DR instruction, the first control device 9 may determine the reduction or increase amount of the home load power consumption of each of the dwelling units and the common area, or the target amount of the reverse flow power, according to the recent power consumption of each of the dwelling units and the common area, and transmit an instruction regarding charging and discharging the secondary battery to the second control device 8 so as to realize the target amount. For example, when the first control device 9 receives a signal regarding a DR instruction from a DR instruction side such as an aggregator or a retail electricity supplier, the first control device 9 determines the reduction target amount of the home load power consumption of each of the dwelling units and the common area based on the home load power consumption of each of the dwelling units and the common area that is periodically measured, and transmits an instruction to the second control device 8 for each of the dwelling units and the common area so as to realize the reduction target amount. In this way, the DR instruction received from the DR instruction side such as an aggregator or a retail electricity supplier for the entire apartment building can be made into a DR instruction suitable for creating a DR response record for each of the dwelling units and the common area, and the creation of a DR response record for each of the dwelling units and the common area can be promoted.

[0059] [Variation 18] In the above embodiment, it was explained that the first control device 9, through the control of the second control device 8, controls the connected EVs 12 to discharge all at once and to perform reverse power flow. However, the discharge control of the secondary battery does not necessarily need to be performed through the control of the second control device 8. The first control device 9 and the secondary battery may be directly connected by a control line, and the discharge of the secondary battery may be directly controlled by the first control device 9, and reverse power flow may be performed. In the example of FIG. 9, the first control device 9 and the EV charger / discharger 11 are directly connected by a control line, and the EV 12 is directly controlled to discharge by the first control device 9, and reverse power flow is performed. When a signal related to a DR instruction is transmitted from a DR instruction side such as an aggregator or a retail electricity supplier, the first control device 9 receives the signal related to the DR instruction (a301), and based on the DR instruction, the first control device 9 directly controls the connected secondary battery to discharge (a302), and power is discharged from the EV 12 (a203). The first control device 9 controls the reverse power flow to supply surplus power, including power discharged from the EV 12 present in the power supply system 100 and power supplied from the distributed power source 3, to the grid (a304). This allows the resident or owner to receive an incentive according to the DR compliance performance by generating a reverse power flow using the secondary battery connected to each dwelling unit and common area (a305).

[0060] [Variation 19] The first control device 9 may be configured to control the number of operating connection points. For example, the first control device 9 may determine the number of operating connection points based on the power capacity of the second distribution board 6, and transmit instructions to the second control device 8 so that only the determined number of connection points are operated. This makes it possible to control charging and discharging within an appropriate range of power for the apartment building, even if instructions from residents and the owner are for charging or discharging that exceed the capacity of the apartment building.

[0061] [Variation 20] The first control device 9 may be configured to control the execution of power interchange between each of the dwelling units, between the common areas, and between each of the dwelling units and the common areas. For example, when the first control device 9 detects the occurrence of a power outage, it detects the charge level of the secondary battery connected to each of the dwelling units and the common areas, and controls the discharge of the secondary battery having a predetermined charge level. The power discharged in this manner may be supplied to a dwelling unit or a common area other than the dwelling unit or the common area to which the secondary battery is connected.

[0062] [Variation 21] The centralized receiving board 2, the first distribution board 4, and / or the second distribution board 6 may have various types of breakers, such as a wiring circuit breaker that cuts off overcurrent caused by a short circuit or overload, and a ground fault circuit interrupter that cuts off leakage current.

[0063] [Variation 22] The second meter device 5 may be configured to measure the amount of power flowing back from each dwelling unit and common area of ​​the power supply system 100 to the grid.

[0064] [Variation 23] The power supply system 100 may further include a distribution board for transforming the high-voltage collectively received power. The distribution board may be provided between the system and the first meter device 1, or between the system and the collectively receiving board 2. Examples of the distribution board include a closed type (cubicle type) distribution board and an open type distribution board.

[0065] [Effects of the embodiment] In one aspect, a power supply system in an apartment building having a plurality of dwelling units and a common area includes a central receiving board that receives power from a grid, a first distribution board that supplies the power received collectively by the central receiving board to the plurality of dwelling units and the common area, a distributed power source including a power generation device using renewable energy provided between the central receiving board and the first distribution board, and a first control device that controls the distributed power source, and each of the plurality of dwelling units and the common area has a connection point to which a secondary battery can be connected, a second distribution board that can supply power supplied from the first distribution board to household loads and to a secondary battery connected to the connection point, and a second control device that controls charging and discharging of the secondary battery connected to the connection point, wherein the secondary battery is charged by power supplied from the second distribution board, and power discharged from the secondary battery is supplied to the household loads via the second distribution board. Therefore, even when centralized power reception is performed in the apartment building, the diverse power needs of each resident of each dwelling unit can be met.

[0066] In one aspect, the second control device receives instructions from the residents of each unit regarding the charging and discharging of the secondary batteries connected to the connection points of each unit and controls the charging and discharging of the secondary batteries, allowing the residents of each unit in the apartment building to freely control the charging and discharging of the secondary batteries.

[0067] In one embodiment, the second control device receives instructions from the first control device regarding the charging and discharging of the secondary batteries connected to the connection points of each dwelling unit and controls the charging and discharging of the secondary batteries, making it possible for the first control device to control the charging and discharging of each dwelling unit and enabling DR response from outside each dwelling unit.

[0068] The first control device controls the second control device of each dwelling unit based on the demand response signal to control the discharge of the secondary battery, thereby making it possible to prompt the creation of DR response results for each dwelling unit from outside the dwelling unit.

[0069] In one aspect, when the first control device detects a stop in the power supply from the grid, it controls the second control device to control the charging and discharging of the secondary battery, so that in the event of a power outage due to a disaster or other reason, residents of each residence can use the external power of the secondary battery.

[0070] In one embodiment, when the supply of renewable energy from a distributed power source is detected, the second control device in each residence is controlled to control the storage of electricity at the connection point, so that residents and owners can add inexpensive renewable energy electricity to their options for charging secondary batteries.

[0071] In one aspect, the renewable energy is electricity generated by a residential complex, so that residents and owners can add inexpensive renewable energy-based electricity to their options for charging secondary batteries.

[0072] In one aspect, the system further includes a portable storage battery, the charging and discharging of which can be controlled by the second control device. The portable storage battery is charged by receiving power from the second distribution board, and the power discharged from the portable storage battery is supplied to in-house loads via the second distribution board. Therefore, in the event of a power outage due to a disaster or the like, occupants of each residence can add the external power of the highly versatile portable storage battery to their options.

[0073] The present invention is not limited to the above-described embodiment, and can be implemented in various other forms without departing from the scope of the present invention. Therefore, the above-described embodiment is merely an example in every respect and should not be interpreted as being restrictive. For example, the steps of the above-described embodiments and information processing can be arbitrarily changed in order or executed in parallel as long as there is no contradiction in the processing contents. [Explanation of symbols]

[0074] Reference Signs List 1...first meter device, 2...centralized power receiving board, 3...distributed power source, 30...meter device for distributed power source, 4...first distribution board, 5...second meter device, 6...second distribution board, 7...domestic load, 8...second control device, 9...first control device, 10...storage battery, 11...EV charger / discharger, 12...EV, 13...portable storage battery, 100...power supply system

Claims

1. A power supply system for an apartment building having a plurality of dwelling units and a common area, A centralized power receiving panel that receives power from the grid; A first distribution board that supplies the power collectively received by the centralized power receiving board to the plurality of dwelling units and a common area; A distributed power source including a power generation device using renewable energy, the distributed power source being provided between the centralized power receiving board and the first distribution board; A first control device that controls the distributed power sources, Each of the plurality of dwelling units and common areas is a connection point to which a secondary battery can be connected; A second distribution board capable of supplying the power supplied from the first distribution board to a home load and a secondary battery connected to the connection point; and a second control device that controls charging and discharging of a secondary battery connected to the connection point, the secondary battery being charged by power supplied from the second distribution board, and power discharged from the secondary battery being supplied to the indoor load via the second distribution board. Power supply system.

2. The second control device receives instructions from residents of each dwelling unit regarding charging and discharging of the secondary battery connected to the connection point of each dwelling unit, and controls charging and discharging of the secondary battery. The power supply system according to claim 1 .

3. the second control device receives, from the first control device, instructions regarding charging and discharging of the secondary batteries connected to the connection points of each dwelling unit, and controls charging and discharging of the secondary batteries. The power supply system according to claim 1 .

4. The first control device controls the second control device of each of the dwelling units based on a demand response signal to control discharging of the secondary battery. The power supply system according to claim 3 .

5. When the first control device detects a stop of the supply of power from the grid, the first control device controls the second control device to control charging and discharging of the secondary battery. The power supply system according to claim 1 .

6. When the first control device detects the supply of renewable energy from the distributed power source, the first control device controls the second control device of each of the dwelling units to control the storage of electricity at the connection point. The power supply system according to claim 1 .

7. The distributed power source includes a power generation device using at least one of renewable energy sources including solar power generation, wind power generation, and small and medium-sized hydroelectric power generation, The power supply system according to claim 1 .

8. The renewable energy is electricity generated by the housing complex. The power supply system according to claim 1 .

9. The secondary battery is at least one of an electric vehicle, a plug-in hybrid vehicle, a fuel cell vehicle, a portable storage battery, and a stationary storage battery. The power supply system according to claim 1 .

10. A portable storage battery is connectable to the storage device. The portable storage battery is capable of controlling charging and discharging by the second control device, and the portable storage battery is charged by being supplied with power from the second distribution board, and the power discharged from the portable storage battery is supplied to the indoor load via the second distribution board. The power supply system according to claim 1 .

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