JP7165595B2 - Power supply system and housing complex - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to power supply systems and collective housing.

A configuration is known in which electric power is supplied from a distributed power source including a solar power generation device to a common area of a collective housing (for example, see Patent Document 1).

JP 2015-37354 A

Electric power from the distributed power supply is required to be supplied not only to the common areas but also to the dwelling units.

An object of the present disclosure is to provide a power supply system and collective housing that can easily supply power from distributed power sources to dwelling units.

A power supply system according to an embodiment of the present disclosure supplies power to at least two dwelling units from a power grid and a storage battery . The power supply system includes a distribution board, a node, a power conditioner, a breaker, a first power supply, and a second power supply. The distribution board distributes electric power from at least one of the electric power network and the storage battery to each of the dwelling unit sections and common section loads. At the node, wiring to the distribution board is connected to wiring between the storage battery and the power network. The power conditioner is provided between the storage battery and the node, and is capable of reverse power flow of power from the storage battery to the power network. The breaker is provided between the power conditioner and the power grid, and cuts off reverse power flow from the power conditioner to the power grid in a power failure state. The said 1st electric power feeding part is provided in each dwelling-unit part. The first power supply unit can supply power received from the distributed power supply to a first load. A said 2nd electric power feeding part is provided in each dwelling-unit part. The second power supply unit can supply power received from the power network to a second load. The rated power of the first power supply is less than the rated power of the second power supply.

An apartment complex according to an embodiment of the present disclosure includes at least two dwelling units that receive power from a power grid and a storage battery . The housing complex includes a distribution board, a node, a power conditioner, a breaker, a first power supply section, and a second power supply section. The distribution board distributes electric power from at least one of the electric power network and the storage battery to each of the dwelling unit sections and common section loads. At the node, wiring to the distribution board is connected to wiring between the storage battery and the power network. The power conditioner is provided between the storage battery and the node, and is capable of reverse power flow of power from the storage battery to the power network. The breaker is provided between the power conditioner and the power grid, and cuts off reverse power flow from the power conditioner to the power grid in a power failure state. The said 1st electric power feeding part is provided in each dwelling-unit part. The first power supply unit can supply power received from the distributed power supply to a first load. A said 2nd electric power feeding part is provided in each dwelling-unit part. The second power supply unit can supply power received from the power network to a second load. The rated power of the first power supply is less than the rated power of the second power supply.

According to the power supply system and collective housing according to an embodiment of the present disclosure, power from the distributed power supply is easily supplied to the dwelling units.

1 is a block diagram showing a configuration example of a power supply system according to one embodiment; FIG. It is a figure which shows the structural example of the collective housing which receives electric power from a power supply system. It is a figure which shows the example of a 1st electric power feeding part and a 2nd electric power feeding part. FIG. 4 is a diagram showing an example of a first switch and a second switch; FIG.

As shown in FIG. 1 , a power supply system 100 according to one embodiment supplies power to a collective housing 1 . A housing complex 1 includes a common area 3 and a plurality of dwelling unit areas 2 . The dwelling unit section 2 is assumed to include dwelling unit sections 2a and 2b. The number of dwelling units 2 is not limited to two, and may be three or more.

The housing complex 1 may be in various forms such as condominiums, apartments, or maisonettes. The collective housing 1 may be managed by a management entity. The managing entity of the collective housing 1 may be the owner of the collective housing 1 or a business operator managing the collective housing 1 or the like. The managing body of the housing complex 1 may enter into a tenancy contract with each resident of each dwelling unit 2 individually.

Common areas 3 may include, for example, corridors or stairs of collective housing 1 . The common section 3 comprises a common section load 34 . The common area load 34 may include equipment provided in the common area 3, such as lighting fixtures such as outdoor lights, septic tank blower power supplies, emergency equipment such as fire alarms, and other equipment such as air conditioners.

The dwelling unit section 2 may include a space in which residents live. The dwelling unit section 2 includes a dwelling unit load 2L. The dwelling unit load 2L is an electric power load provided in each dwelling unit 2, and may be, for example, electrical equipment such as a lighting fixture, a refrigerator, a television, or an air conditioner used in each dwelling unit 2.

The power supply system 100 includes a common area transaction meter 31 included in the common area 3 and a dwelling unit transaction meter 32 included in each dwelling unit unit 2 . The power supply system 100 is connected to a power network 50 via a common area transaction meter 31 and a dwelling unit transaction meter 32 . The power grid 50 distributes power supplied by the power company. The common area transaction meter 31 and the dwelling unit transaction meter 32 measure the amount of power received from the power network 50 . The common area transaction meter 31 and the residential area transaction meter 32 may be certified watt-hour meters. A certified watt-hour meter is also called a certified meter. The electric power company manages the common area transaction meter 31 and the residential area transaction meter 32 and acquires the measurement results from the common area transaction meter 31 and the residential area transaction meter 32 . The electric power company charges the management entity of the collective housing 1 and the residents of the dwelling unit 2 with electricity charges based on the measurement results of the common area transaction meter 31 and the dwelling unit transaction meter 32 .

A management entity of the collective housing 1 managing the common area 3 concludes a power receiving contract for the common area 3 with an electric power company. A resident of each dwelling unit 2 concludes a power receiving contract for each dwelling unit 2 with an electric power company. That is, the common area 3 and each dwelling unit 2 receive power based on the individually concluded power receiving contract. The common area 3 and each dwelling unit 2 receive power from the power network 50 via the common area transaction meter 31 and each dwelling unit transaction meter 32, respectively.

The power supply system 100 further includes a shared electrical board 33 included in the shared section 3 . The shared electrical board 33 is connected to a shared section load 34 included in the shared section 3 .

The power supply system 100 includes a first power supply section 11 and a second power supply section 21 . Both the first power supply section 11 and the second power supply section 21 are installed in each dwelling unit section 2 . The first power supply unit 11 is connected to a shared electrical panel 33 included in the shared section 3 and receives power from the shared electrical panel 33 . The second power supply unit 21 is connected to the power network 50 via the residential unit transaction meter 32 and receives power from the power network 50 . The first power supply unit 11 and the second power supply unit 21 can supply power to the first load 12 and the second load 22, respectively. It is assumed that the first load 12 and the second load 22 are included in the dwelling unit load 2L.

Power supply system 100 further comprises a distributed power source 60 . The distributed power source 60 is included in the shared section 3 . The distributed power source 60 includes a power conditioner (hereinafter also referred to as PCS) 61 , a solar cell (hereinafter also referred to as PV) 62 and a storage battery (hereinafter also referred to as BT) 63 . Distributed power supply 60 may have at least one of PV 62 and BT 63 .

The PCS 61 may include an inverter, converter, or the like. The PCS 61 converts the DC power output from the PV 62 and the BT 63 into AC power or into DC power of different voltages. The PCS 61 may output the converted AC power or DC power to the shared electrical panel 33 . The PCS 61 may reverse flow the converted AC power to the power grid 50 . The PCS 61 may convert the DC power output by the PV 62 or the AC power supplied by the power network 50 into DC power that can be charged to the BT 63 and charge the BT 63 .

The PV 62 is not limited to solar cells, and may be replaced by power sources based on other renewable energies, such as power sources generated by wind power. The PV 62 may be replaced with configurations that include multiple types of renewable energy-based power sources. PV 62 may be replaced by other power sources such as fuel cells.

The BT 63 may be charged with the power output by the PV 62 that cannot be consumed by the load connected to the common electrical board 33 . BT 63 may be charged with power received from power grid 50 .

The number of PCS 61, PV 62, and BT 63 is not limited to one, and may be two or more. For example, the PV 62 may be divided and provided on the roof of the collective housing 1, the roof of the parking lot of the collective housing 1, or the site of the collective housing 1, or the like.

The shared electrical board 33 receives power from at least one of the power network 50 and the distributed power source 60 . The shared electrical board 33 supplies the received power to the shared section load 34 and the first power supply section 11 of each dwelling unit section 2 .

Distributed power source 60 may reverse flow surplus power to power grid 50 via commons transaction meter 31 . The surplus power corresponds to the power output from the distributed power supply 60 that exceeds the power consumed by the common section load 34 and the first load 12 connected to the common section electric board 33 . The common part transaction meter 31 measures the amount of power supplied from the power network 50 to the common part load 34 and the first load 12 and measures the amount of power reversely flowed from the distributed power source 60 to the power network 50 . The electric power company charges the management entity of the collective housing 1 an electricity rate according to the amount of power supplied to the common area load 34 and the first load 12 based on the measurement result of the common area transaction meter 31. At the same time, the customer pays a power selling fee corresponding to the amount of power reversely flowed to the power network 50. - 特許庁In other words, if the power selling rate corresponding to the amount of power flowed in reverse is higher than the power rate corresponding to the power amount supplied to the common area load 34 and the first load 12, the electric power company manages the collective housing 1. Pay a fee to the entity.

As shown in FIG. 2, the housing complex 1 includes dwelling units 2a and 2b. It is assumed that the dwelling unit section 2a and the dwelling unit section 2b have the same configuration. The dwelling unit section 2a and the dwelling unit section 2b are referred to as the dwelling unit section 2 when they do not need to be distinguished from each other.

The dwelling unit section 2 includes a first power supply section 11 and a second power supply section 21 in one room. The first power supply unit 11 and the second power supply unit 21 may include, for example, an outlet provided on the wall of the room, or may include a ceiling rosette or socket provided on the ceiling of the room. The first power supply unit 11 and the second power supply unit 21 may include wiring terminals that are directly connected to the load. A resident of the dwelling unit 2 may connect the device to either the first power supply unit 11 or the second power supply unit 21 .

The first power supply unit 11 is configured to be able to supply power to the first load 12 . The first load 12 may include, for example, an LED (Light Emission Diode) downlight connected to a first power supply 11 provided as a ceiling rosette or socket in the ceiling of the room. The first load 12 may include, for example, an electronic device that receives power via a USB (Universal Serial Bus) terminal, such as a smartphone or tablet. The first load 12 is not limited to these examples and may include various loads.

The second power supply unit 21 is configured to be capable of supplying power to the second load 22 . The second load 22 includes, for example, an air conditioner 22a, a television 22b, an IH (Induction Heating) heater 22c, a refrigerator 22d, or the like, which are connected to a second power supply unit 21 provided as an outlet on the wall of the room. may contain. The second load 22 may include, for example, a ceiling light 22e connected to a second power supply 21 provided as a ceiling rosette on the ceiling of the room. The second load 22 is not limited to these examples and may include various loads.

In a normal state in which the power network 50 supplies power, the first power supply unit 11 can supply power to the first load 12 with power from at least one of the power network 50 and the distributed power supply 60 . That is, the first power supply unit 11 is configured to be able to supply power from the distributed power supply 60 to the first load 12 even in a normal state. The 1st electric power feeding part 11 is provided in both the dwelling unit parts 2a and 2b. Both the first power supply unit 11 of the dwelling unit 2a and the first power supply unit 11 of the dwelling unit 2b can receive power from at least one of the power network 50 and the distributed power supply 60 via the common partial switchboard 33 . In a normal state, the second power supply unit 21 can supply power to the second load 22 with power from the power grid 50 .

In a power failure state in which the power grid 50 cannot supply power, the first power supply unit 11 cannot receive power from the power grid 50 but can receive power from the distributed power source 60 . Both the first power supply unit 11 of the dwelling unit 2 a and the first power supply unit 11 of the dwelling unit 2 b can receive power from the distributed power supply 60 via the common partial electrical board 33 . That is, both the first power supply unit 11 of the dwelling unit 2 a and the first power supply unit 11 of the dwelling unit 2 b can supply power to the first load 12 with power from the distributed power supply 60 . The power supply system 100 may further include a breaker 35 between the distributed power source 60 and the common area electric board 33 and the node where the common area transaction meter 31 branches. In a power outage condition, power supply system 100 may interrupt distributed power supply 60 and commons transaction meter 31 by breaker 35 . By doing so, reverse power flow from the distributed power supply 60 to the power network 50 is prevented in a power failure state.

In a power failure state, the second power supply unit 21 cannot receive power from the power network 50 . That is, the second power supply section 21 cannot supply power to the second load 22 . Since the dwelling unit 2 includes both the first power supply unit 11 and the second power supply unit 21, the residents of the dwelling unit 2 can use the equipment as the first load 12 even in a power failure state. The first power supply section 11 functions as a backup power supply for the residents of the dwelling unit section 2 during a power failure. With the first power supply unit 11 functioning as a backup power supply, the power supply system 100 can provide FCP (Family Continuity Plan) or LCP (Life Continuity Plan) countermeasure services for households. The power supply system 100 can provide a BCP (Business Continuity Plan) countermeasure service for companies.

In a power failure state, the first power supply unit 11 receives power only from the distributed power supply 60 . The power that can be received by first power supply unit 11 in a power failure state is less than the power that can be received by first power supply unit 11 in a normal state. For example, the current output by distributed power supply 60 is limited based on the current capacity of PCS 61 or the power generation capacity of PV 62 . When the distributed power supply 60 outputs a current of a predetermined value, the duration of current output is limited based on at least one of the power generation capacity of the PV 62 and the storage capacity of the BT 63 .

Each of the first power supply section 11 and the second power supply section 21 has a rated power. The rated power is determined by the capacity of electric wiring and the like. For example, based on the standards for two-prong outlets included in the Japanese Industrial Standards (JIS), a two-prong outlet can supply single-phase AC power with a current of 15 A (amperes) or less and a voltage of 125 V (volts) or less. . It is assumed that the first power supply unit 11 receives single-phase AC power with a voltage of 100 V from the common electric board 33 . It is assumed that the second power supply section 21 receives single-phase AC power with a voltage of 100V via the transaction meter 32 of the residential unit section. In these cases, the first power supply section 11 and the second power supply section 21 can receive a current of 15A or less. That is, the rated current of each of the first power supply section 11 and the second power supply section 21 is 15A.

In the power supply system 100 according to this embodiment, the rated power of the first power supply unit 11 is set to a value smaller than the rated power of the second power supply unit 21 . When the voltage of the first power supply section 11 and the voltage of the second power supply section 21 are the same, the rated current of the first power supply section 11 is smaller than the rated current of the second power supply section 21 . By doing so, the current that the first power supply unit 11 supplies to the first load 12 is limited.

The current supplied by the first power supply unit 11 to the first load 12 may be limited so that the power consumption of the first load 12 is covered by the power supplied by the distributed power supply 60 . Since the power consumption of the first load 12 is covered by the power supplied by the distributed power supply 60, the power supplied from the power grid 50 to the first power supply unit 11 can be reduced.

When the distributed power supply 60 supplies power to the first load 12 via the first power supply unit 11 in a power failure state, the current supplied by the first power supply unit 11 to the first load 12 is limited, so that the duration of power supply is becomes longer. By doing so, even if the power outage continues for a long period of time, the possibility of continuing power supply to the first load 12 increases. As a result, the reliability of the FCP, LCP, or BCP countermeasure service provided by the power supply system 100 is enhanced.

The rated power of the first power supply unit 11 may be set to a value equal to or less than the value obtained by dividing the rated power of the second power supply unit 21 by the number of dwelling units 2 included in the housing complex 1 . In other words, the sum of the rated power of the first power supply units 11 provided in each dwelling unit 2 may be set to be equal to or less than the rated power of the second power supply units 21 . When the voltage of the first power supply section 11 and the voltage of the second power supply section 21 are the same, the rated current of the first power supply section 11 is the same as the rated current of the second power supply section 21. may be set to a value less than or equal to the value divided by the number of

By setting the rated current of the first power supply unit 11 as described above, the sum of the currents flowing in each wiring connecting from the shared electric board 33 to the first power supply unit 11 of each dwelling unit 2 is a JIS bipolar It will be within the range of the standard for outlets. In this case, the wiring from the common partial electric board 33 to the first power supply section 11 of each dwelling unit section 2 can be easily installed. For example, wiring connected to the first power feeding section 11 of each dwelling unit section 2 may be branched from a pair of original wirings coming out of the shared electrical board 33 . The shared electrical panel 33 requires only one breaker to cut off the current of the original pair of wires at the rated current. In other words, the number of breakers provided in the path for connecting the current to the first power supply section 11 of each dwelling unit 2 can be reduced to one.

By setting the rated current of the first power supply unit 11 as described above, the current supplied to the first load 12 by the first power supply unit 11 of each dwelling unit 2 is limited to a smaller value. As a result, the power consumption of the first load 12 is more likely to be covered by the power of the distributed power supply 60 .

A power supply system 100 according to this embodiment includes a first power supply unit 11 and a second power supply unit 21 in a dwelling unit 2 . The first power supply unit 11 receives power from the distributed power supply 60 and also receives power from the power network 50 via the shared unit 3 . The second power supply unit 21 receives power from the power network 50 without going through the shared unit 3 .

As a comparative example, a system is assumed in which each dwelling unit section 2 receives power from the distributed power source 60 and the power network 50 without going through the common section 3 . That is, in the system according to the comparative example, each dwelling unit 2 does not have the first power supply unit 11, and each dwelling unit 2 receives power from the distributed power supply 60 without passing through the common area 3. is different from the power supply system 100 according to

In the system according to the comparative example, each dwelling unit 2 needs to be provided with a PCS 61 in order to receive power from the distributed power source 60 . In this case, the required number of PCS 61 increases and the installation area of PCS 61 increases. On the other hand, according to the power supply system 100 according to this embodiment, the PCS 61 may be provided only in the shared section 3 . This reduces the required number of PCS 61 and reduces the installation area of PCS 61 . That is, the first power supply unit 11 can be easily installed. As a result, it becomes easier to introduce a configuration in which power is supplied from the distributed power source 60 in each dwelling unit 2 .

In the system according to the comparative example, each dwelling unit 2 needs to be provided with a BT 63 in order to use the power stored in the BT 63 . BT 63 may be prepared only with a power storage capacity larger than a predetermined capacity. If the power storage capacity of one BT 63 is greater than a predetermined capacity, the BT 63 will be able to store all of the BT 63 based on the upper limit of the total power storage capacity of the BT 63 that can be installed in one collective housing 1, which is stipulated by laws such as the Fire Service Act. It may not be possible to install in dwelling unit 2. In this case, the fairness between the dwelling unit section 2 in which the BT 63 is installed and the dwelling unit section 2 in which the BT 63 is not installed is impaired. On the other hand, according to the power supply system 100 according to the present embodiment, the BT 63 is installed only in the common area 3 and can supply the stored electric power to all the dwelling unit areas 2 . As a result, the fairness of each dwelling unit section 2 is ensured.

In the system according to the comparative example, since each dwelling unit 2 receives power from the distributed power source 60, the self-consumption of power generated by the PV 62 differs depending on the life patterns of the residents of the dwelling unit 2. FIG. For example, in the dwelling unit section 2 where residents are often absent during the daytime, the self-consumption of power generated by the PV 62 is reduced. As a result, the self-consumption of the housing complex 1 as a whole may decrease. On the other hand, according to the power supply system 100 according to this embodiment, the power generated by the PV 62 is supplied to all the dwelling units 2 . By leveling out the lifestyle patterns of the residents of each dwelling unit 2, the power generated by the PV 62 is easily consumed in-house. As a result, the self-consumption of the housing complex 1 as a whole increases.

As described above, the power supply system 100 and the housing complex 1 according to the present embodiment include the first power supply unit 11 and the second power supply unit 21 in each dwelling unit 2, thereby are made easy to use in each dwelling unit 2. Since the rated power of the first power supply unit 11 is smaller than the rated power of the second power supply unit 21 , the power consumption of the first load 12 is easily covered by the power of the distributed power supply 60 . Since the rated power of the first power supply unit 11 is smaller than the value obtained by dividing the rated power of the second power supply unit 21 by the number of dwelling unit units 2, construction work is facilitated, and the power consumption of the first load 12 is reduced to a distributed power supply. 60 power makes it even more affordable. When the distributed power supply 60 uses renewable energy such as solar cells, the power supplied from the first power supply unit 11 is cleaner energy than power generated by thermal power generation or the like. The power supply system 100 and the housing complex 1 according to the present embodiment efficiently supply clean energy not only during a power failure but also in a normal state in which power received from the power network 50 is supplied to the second load 22. 1 power supply unit 11 is used to enable self-consumption. The power supply system 100 and collective housing 1 according to this embodiment can contribute to global environmental protection and improvement of residents' awareness of environmental protection by having such a configuration.

(Other embodiments)
The first power supply unit 11 may include a power supply IC (Integrated Circuit) that controls output power. The power supply IC can limit the power supplied to the load to a predetermined power capacity or less. For example, the power supply IC can limit the power supplied to the first load 12 to the rated power of the first power supply unit 11 or less. By limiting the output power of the first power supply unit 11 to the rated power or less, the stability or reliability of the power supply system 100 is improved.

Commons loads 34 may include a variety of loads. The common area load 34 may include, for example, a high power load such as an outdoor mercury lamp that consumes power equal to or greater than a predetermined value. Common area loads 34 may include, for example, small power loads such as hallway LED downlights that consume less than a predetermined amount of power. Distributed power supply 60 may be configured to power low power loads of commons loads 34 and not power high power loads. The distributed power supply 60 may be configured to supply power to some of the common area loads 34 but not to other loads during a power outage. By doing so, the power supplied by the distributed power supply 60 is limited in the event of a power failure. Limiting the power supply increases the amount of time that distributed power supply 60 can continue to supply power. As a result, the reliability of the FCP, LCP, or BCP countermeasure service provided by the power supply system 100 is enhanced.

The first power feeding section 11 and the second power feeding section 21 may be distinguished by at least one of display and shape. Since the first power supply unit 11 and the second power supply unit 21 can be distinguished, the resident of the dwelling unit 2 can easily grasp the first power supply unit 11 that can be used during a power failure. As a result, residents can easily recognize the FCP, LCP, or BCP countermeasure service provided by the power supply system 100 .

The first power supply 11 and the second power supply 21 may be, for example, outlets of the type shown in FIG. The first power supply unit 11 is a USB outlet. The second power feeding section 21 is a two-pole outlet. In other words, the first power feeding portion 11 and the second power feeding portion 21 may be distinguished by their external shapes. The first power supply unit 11 is labeled with, for example, "Can be used during power failure" or "BCP compatible", while the second power supply unit 21 is blank. That is, the first power feeding section 11 and the second power feeding section 21 may be distinguished by display. The display for distinguishing between the first power supply unit 11 and the second power supply unit 21 is not limited to the characters "Can be used even during a power failure" or "BCP compatible", but may include other characters, Graphics, colors, and the like may be included.

The first power supply section 11 and the second power supply section 21 may be connected to the first load 12 and the second load 22 via the first switch 13 and the second switch 23 shown in FIG. 4, for example. Assume that the first load 12 connected to the first switch 13 includes an LED downlight. Assume that the second load 22 connected to the second switch 23 includes a ceiling light 22e. By transitioning to the ON state, the first switch 13 conducts the power supply path from the first power supply unit 11 to the first load 12 and lights the LED downlight as the first load 12 . The second switch 23 turns ON the power supply path from the second power supply unit 21 to the second load 22 and turns on the ceiling light 22e as the second load 22 .

The first power supply unit 11 and the second power supply unit 21 may be distinguished by at least one of the display and shape of the first switch 13 and the second switch 23 corresponding thereto. The first switch 13 is marked with the words "BCP compatible" or "can be used even during power outages", while the second switch 23 is blank. That is, the first switch 13 and the second switch 23 may be distinguished by display. The display for distinguishing between the first switch 13 and the second switch 23 is not limited to the characters "BCP compatible" or "Can be used even during a power failure" as illustrated, but may include other characters, graphics or May include color, etc.

The first switch 13 and the second switch 23 may have display portions 13a and 13b, respectively. The display units 13a and 23a may display the states of the switches. For example, the displays 13a and 23a may include LEDs and may display green when the switch is on and red when the switch is off. When the distributed power supply 60 supplies power to the first switch 13 at the time of power failure, the display section 13a of the first switch 13 is lit in red or green. On the other hand, the display portion 23a of the second switch 23 is turned off. During a power outage, residents of the dwelling unit 2 can distinguish the first switch 13 from the second switch 23 because the display 13a of the first switch 13 is lit. As a result, the resident can use the first load 12 by operating the first switch 13 having the illuminated display portion 13a.

The figures describing the embodiments of the present disclosure are schematic. The dimensional ratios and the like on the drawings do not necessarily match the actual ones.

Although the embodiments of the present disclosure have been described with reference to the drawings and examples, it should be noted that those skilled in the art can easily make various variations or modifications based on the present disclosure. Therefore, it should be noted that these variations or modifications are included within the scope of this disclosure. For example, functions included in each component can be rearranged so as not to be logically inconsistent, and multiple components can be combined into one or divided.

Descriptions such as “first” and “second” in the present disclosure are identifiers for distinguishing the configurations. Configurations that are differentiated in descriptions such as "first" and "second" in this disclosure may interchange the numbers in that configuration. For example, a first feed can exchange identifiers "first" and "second" with a second feed. The exchange of identifiers is done simultaneously. The configurations are still distinct after the exchange of identifiers. Identifiers may be deleted. Configurations from which identifiers have been deleted are distinguished by codes. The description of identifiers such as “first” and “second” in this disclosure should not be used as a basis for interpreting the order of the configuration or the existence of lower numbered identifiers.

1 collective housing 2 (2a, 2b) dwelling unit section 2L dwelling unit load section 3 common section 11 first feeding section 12 first load 13 first switch 13a display section 21 second feeding section 22 second load 23 second switch 23a display section 31 common part transaction meter 32 dwelling unit part transaction meter 33 common part electric board 34 common part load 35 breaker 50 power network 60 distributed power supply 61 power conditioner (PCS)
62 Photovoltaic (PV)
63 Battery (BT)
100 power supply system

Claims (12)

A power supply system that supplies power from a power grid and a storage battery to at least two dwelling units ,
a power distribution board that distributes power from at least one of the power network and the storage battery to each of the dwelling units and the common area load;
a node where the wiring to the distribution board is connected to the wiring between the storage battery and the power grid;
a power conditioner provided between the storage battery and the node, the power conditioner being capable of reverse power flow of power from the storage battery to the power grid;
A breaker provided between the power conditioner and the power grid, the breaker for interrupting reverse power flow from the power conditioner to the power grid in a power failure state;
a first power supply unit provided in each dwelling unit and capable of supplying electric power received from the storage battery to a first load;
A second power supply unit provided in each of the dwelling units and capable of supplying power received from the power network to a second load,
The power supply system, wherein the rated power of the first power supply is less than the rated power of the second power supply. 2. The power supply system according to claim 1, wherein the rated power of said first power supply unit is equal to or less than a value obtained by dividing the rated power of said second power supply unit by the number of said dwelling units. 3. The method according to claim 1, wherein the first power supply unit is capable of supplying power received from the storage battery to the first load in a normal state in which power received from the power network is supplied to the second load. A power supply system as described. The power supply system according to any one of claims 1 to 3, wherein said first power supply unit is capable of further supplying power received from said power network to said first load. 5. The power supply system according to any one of claims 1 to 4, wherein the first power supply is distinguished from the second power supply by shape . 6. The power delivery system of claim 5, wherein said first power source comprises a USB outlet. A first switch connected between the first power supply and the first load is distinguished in shape from a switch connected between the second power supply and the second load. Item 7. The power supply system according to any one of Items 1 to 6. 8. The power supply system of any one of claims 1-7, wherein the first load comprises an LED downlight. The power supply system according to any one of claims 1 to 8, wherein the first power supply unit limits output power to a rated power of the first power supply unit or less. 10. The power supply system according to any one of claims 1 to 9 , comprising a solar cell or a fuel cell together with the storage battery . 11. The power supply system according to claim 10, wherein said storage battery supplies power to a load that consumes power less than a predetermined value among said common area loads. An apartment complex comprising at least two dwelling units receiving power from a power grid and a storage battery ,
a power distribution board that distributes power from at least one of the power network and the storage battery to each of the dwelling units and the common area load;
a node where wiring to the distribution board is connected to wiring between the storage battery and the power network;
a power conditioner provided between the storage battery and the node, the power conditioner being capable of reverse power flow of power from the storage battery to the power grid;
A breaker provided between the power conditioner and the power grid, the breaker for interrupting reverse power flow from the power conditioner to the power grid in a power failure state;
a first power supply unit provided in each dwelling unit and capable of supplying electric power received from the storage battery to a first load;
A second power supply unit provided in each of the dwelling units and capable of supplying power received from the power network to a second load,
The collective housing, wherein the rated power of the first power supply is smaller than the rated power of the second power supply.

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