JP7626338B2 - Power supply equipment, housing complexes and power supply panels - Google Patents

Description

This disclosure relates to power supply devices, apartment buildings, and power inlet panels.

A configuration is known in which power is supplied to common areas of an apartment building from distributed power sources, including solar power generation equipment, etc. (see, for example, Patent Document 1).

JP 2015-37354 A

There is a demand to increase the consumption of output electricity from distributed power sources in residential areas.

The objective of this disclosure is to provide a power supply device, an apartment building, and a service panel that can increase the self-consumption rate of output power from distributed power sources in residential areas.

An electric power supply device according to one embodiment of the present disclosure includes a first transaction meter and a second transaction meter connected between an apartment building having multiple dwelling units and a power grid. The first transaction meter is connected to a first dwelling unit section including at least two of the dwelling units and a first distributed power source that supplies electric power to the first dwelling unit. The second transaction meter is connected to a second dwelling unit section including at least two of the dwelling units and a second distributed power source that supplies electric power to the second dwelling unit.

An apartment building according to one embodiment of the present disclosure includes a first transaction meter and a second transaction meter connected to a power grid, a first dwelling unit, and a second dwelling unit. The first dwelling unit includes at least two dwelling units connected to the first transaction meter. The second dwelling unit includes at least two dwelling units connected to the second transaction meter.

The service panel according to one embodiment of the present disclosure is installed in an apartment building having multiple dwelling units. The service panel includes a master meter section in which a first master meter and a second master meter connected to a power grid are mounted, and a dwelling unit meter section. The dwelling unit meter section is mounted with multiple first dwelling unit meters connected between the first master meter and a first dwelling unit section including at least two of the dwelling units. The dwelling unit meter section is mounted with multiple second dwelling unit meters connected between the second master meter and a second dwelling unit section including at least two of the dwelling units.

The power supply device, apartment building, and service panel according to one embodiment of the present disclosure can increase the self-consumption rate of output power from distributed power sources in the dwelling unit.

1 is a block diagram showing an example of the configuration of an apartment building, a service panel, and a power supply device according to an embodiment; 1A and 1B are front and side views showing an example of the configuration of an apartment building according to one embodiment. FIG. 13 is a diagram showing an example of grouping dwelling units by floor. FIG. 13 is a diagram showing an example of grouping dwelling units arranged vertically. FIG. 1 is a diagram showing an example in which PCSs are centrally located in one place. A diagram showing an example in which a PCS is installed in each dwelling unit. FIG. 1 is a diagram showing different installation angles of solar panels. FIG. 1 is a diagram showing different installation orientations of solar power generation panels. FIG. 2 is a diagram showing an example of an arrangement of meters or breakers in a service panel according to an embodiment. FIG. 2 is a diagram showing a configuration example of a transaction terminal block. FIG. 2 is a diagram illustrating a configuration example of a branch terminal block.

When a home is equipped with a solar power generation system or the like, the home may be required to have a self-consumption rate of at least a specified value in order to be able to back-flow electricity generated by the solar power generation system back into the power grid. In addition, in order for a home to be recognized as a net-zero energy house (ZEH), the home's self-consumption rate must be increased.

For the reasons mentioned above, it is necessary to increase the self-consumption rate in apartment complex 1 (see Figure 1) equipped with solar power generation equipment, etc.

(Example of the configuration of apartment building 1)
As shown in Figures 1 and 2, an apartment building 1 according to one embodiment includes a first dwelling unit 31, a second dwelling unit 32, and a power supply device 10.

The first dwelling unit 31 includes N1 dwelling units 31-1 to N1. The second dwelling unit 32 includes N2 dwelling units 32-1 to N2. N1 and N2 are natural numbers of 2 or more. N1 and N2 may be the same value or different values. The apartment house 1 illustrated in FIG. 2 is two stories tall. The number of dwelling units on the first floor is the same as the number of dwelling units on the second floor. Each dwelling unit has a dwelling unit load. The dwelling unit load may include various electrical appliances such as lighting fixtures, refrigerators, televisions, or air conditioners used by the residents of the dwelling units. In this embodiment, the dwelling units of the apartment house 1 are divided into two groups, the first dwelling unit 31 and the second dwelling unit 32, but may be divided into three or more groups. The first dwelling unit 31 and the second dwelling unit 32 are also simply referred to as dwelling units.

The power supply device 10 includes a first transaction meter 21 and a second transaction meter 22. The first transaction meter 21 is connected between the power grid 80 and the first dwelling unit 31. The second transaction meter 22 is connected between the power grid 80 and the second dwelling unit 32. In this embodiment, the apartment building 1 includes two transaction meters, the first transaction meter 21 and the second transaction meter 22, in accordance with the number of dwelling unit groups. The number of transaction meters is determined in accordance with the number of dwelling unit groups and may be two or more. The number of transaction meters may be three or more, further including one common area transaction meter 28. The transaction meters are meters (contract meters) owned by the power company that distributes electricity from the power grid 80 to the apartment building 1, and need to be sealed by the power company. The first transaction meter 21 and the second transaction meter 22 are assumed to be certified meters. A certified meter is also called a certified meter.

The apartment building 1 may further include an inlet panel 500. The power supply device 10 may include the inlet panel 500. In the example of FIG. 1, the power supply device 10 includes the inlet panel 500. The power supply device 10 may be included in the inlet panel 500. In the apartment building 1 illustrated in FIG. 2, the inlet panel 500 includes at least a portion of the power supply device 10 and is attached to the exterior wall of the apartment building 1. The inlet panel 500 may be attached to another location of the apartment building 1.

The apartment house 1 may further include a main breaker 81 connected between the power grid 80 and the first and second transaction meters 21 and 22. The main breaker 81 may be included in the service panel 500. When the main breaker 81 is on, the apartment house 1 is electrically connected to the power grid 80 and can receive power from the power grid 80. When the main breaker 81 is off, the apartment house 1 is electrically disconnected from the power grid 80 and cannot receive power from the power grid 80. The main breaker 81 is a breaker attached to the most primary side of the service panel 500, and also serves as a terminal block, limiting the current flowing from the power grid 80 to the entire apartment house 1. When the main breaker 81 is off, the transaction meter stops. The main breaker 81 is not a breaker (contract breaker) owned by the power company, and does not need to be sealed by the power company. If a short circuit or overload occurs in the wiring from the power grid 80 to the first transaction meter 21 or the second transaction meter 22, the main breaker 81 can safely turn off the wiring by switching to the off state.

The wiring from the first transaction meter 21 to the first dwelling unit 31 branches at a virtually provided node 212 and is connected to each of the dwelling units 31-1 to N1. The first transaction meter 21 measures the total amount of electricity supplied from the power grid 80 to all of the dwelling units in the first dwelling unit 31. The wiring from the second transaction meter 22 to the second dwelling unit 32 branches at a virtually provided node 222 and is connected to each of the dwelling units 32-1 to N2. The second transaction meter 22 measures the total amount of electricity supplied from the power grid 80 to all of the dwelling units in the second dwelling unit 32. The nodes 212 and 222 may be realized, for example, as terminal blocks mounted on the intake panel 500.

The apartment house 1 may further include a first branch breaker 211 between the first transaction meter 21 and the node 212. The apartment house 1 may further include a second branch breaker 221 between the second transaction meter 22 and the node 222. The first branch breaker 211 and the second branch breaker 221 may be included in the intake panel 500. By including the first branch breaker 211 and the second branch breaker 221, the apartment house 1 can disconnect only one of the first dwelling unit 31 and the second dwelling unit 32 from the power grid 80. For example, electrical work involving a power outage in the first dwelling unit 31 can be performed while the second dwelling unit 32 is energized. In this embodiment, the apartment house 1 includes two branch breakers, the first branch breaker 211 and the second branch breaker 221, in accordance with the number of transaction meters. The number of branch breakers is determined in accordance with the number of transaction meters and may be two or more. The number of branch breakers may be three or more, further including one common breaker 281 connected between the common master meter 28 and the common load 38. The branch breaker can safely turn off the wiring by turning off if a short circuit or overload occurs in the wiring from the power grid 80 to the dwelling meter. Also, the branch breaker can safely turn off the wiring by turning off if a short circuit or overload occurs in the wiring from the power grid 80 to the distributed power source 40 described below.

The apartment building 1 may further include a first dwelling meter 23 connected between the node 212 and each of the dwelling units 31-1 to N1 of the first dwelling unit section 31. The first dwelling meter 23 may be included in the inlet panel 500. The first dwelling meter 23 measures the amount of electricity consumed in the dwelling loads of each of the dwelling units 31-1 to N1. The apartment building 1 may further include a second dwelling meter 24 connected between the node 222 and each of the dwelling units 32-1 to N2 of the second dwelling unit section 32. The second dwelling meter 24 may be included in the inlet panel 500. The second dwelling meter 24 measures the amount of electricity consumed in the dwelling loads of each of the dwelling units 32-1 to N2. The dwelling meter is not a meter (contract meter) owned by the power company and does not need to be sealed by the power company. The dwelling meter does not need to be a certified meter. The dwelling meter may be a certified meter.

The apartment building 1 may further include a first dwelling unit breaker 231 connected between the first dwelling unit meter 23 and each of the dwelling units 31-1 to N1 of the first dwelling unit section 31. The first dwelling unit breaker 231 may be included in the inlet panel 500. The apartment building 1 may further include a second dwelling unit breaker 241 connected between the second dwelling unit 24 and each of the dwelling units 32-1 to N2 of the second dwelling unit section 32. The second dwelling unit breaker 241 may be included in the inlet panel 500. By including the first dwelling unit breaker 231 and the second dwelling unit breaker 241, the apartment building 1 can be disconnected from the power grid 80 for each dwelling unit. For example, electrical work involving a power outage in one dwelling unit can be carried out while the other dwelling units remain energized. The dwelling unit breaker limits the current flowing to the branched end of the branch breaker. The dwelling breaker can safely turn off the wiring by switching off if a short circuit or overload occurs in the wiring leading to the dwelling load.

The apartment house 1 and the power supply device 10 may further include a first distributed power source 40a and a second distributed power source 40b. The first distributed power source 40a and the second distributed power source 40b are collectively referred to as a distributed power source 40. In this embodiment, the apartment house 1 includes two distributed power sources 40, the first distributed power source 40a and the second distributed power source 40b, in accordance with the number of groups of dwelling units. The number of distributed power sources 40 is determined in accordance with the number of groups of dwelling units, and may be two or more, or may be less than the number of groups of dwelling units as long as it is at least two or more. The number of distributed power sources 40 may be more or less than the number of groups of dwelling units. The number of distributed power sources 40 may be three or more, including one distributed power source 40 connected between the common breaker 281 and the common load 38.

The first distributed power source 40a includes a solar cell (PV) 41a and a power conditioner (PCS: Power Conditioning System) 42a. The second distributed power source 40b includes a PV 41b and a PCS 42b. The PCS 42a of the first distributed power source 40a is connected to node 212. The PCS 42b of the second distributed power source 40b is connected to node 222. When the PCS 42a of the first distributed power source 40a is connected to node 212, the first transaction meter 21 measures the total amount of power supplied from the power grid 80 to all the dwelling units in the first dwelling unit section 31 and the amount of power supplied from the power grid 80 to the first distributed power source 40a. When the PCS 42b of the second distributed power source 40b is connected to the node 222, the second master meter 22 measures the total amount of power supplied from the power grid 80 to all the dwelling units in the second dwelling unit section 32 and the amount of power supplied from the power grid 80 to the second distributed power source 40b.

The distributed power source 40 connected to one dwelling unit may have only one set of PV41 and PCS42, or may have two or more sets. The number of PV41 and PCS42 included in one set of PV41 and PCS42 may be the same or different. The number of PV41 and PCS42 included in one set of PV41 and PCS42 may be one or two or more.

PV41a and PV41b are collectively referred to as PV41. PV41 is a solar power generation panel. PV41a and PV41b are also referred to as a first solar power generation panel and a second solar power generation panel, respectively. In the apartment house 1 illustrated in FIG. 2, PV41 is attached to the roof of the apartment house 1. PV41 is not limited to being installed on the roof of the apartment house 1, and may be installed in other locations, such as within the grounds of the apartment house 1. PV41 converts solar energy into electricity. PV41 is included in renewable energy sources. PV41 may be replaced with other renewable energy sources such as wind power generation. A renewable energy source that generates electricity is also referred to as a renewable energy power generation device. PV41 may be replaced with other non-renewable energy power sources such as fuel cells.

PCS42a and PCS42b are collectively referred to as PCS42. PCS42a and PCS42b are also referred to as the first power conditioner and the second power conditioner, respectively. In the apartment house 1 illustrated in FIG. 2, PCS42 is attached to the outer wall of the apartment house 1. PCS42 may be attached to another location of the apartment house 1. PCS42 may include a power conversion device such as a converter or inverter. PCS42 converts the DC power output by PV41 into AC power or DC power of a different voltage. PCS42 outputs the converted power. PCS42 may measure the amount of power output. PCS42 supplies the converted power to the dwelling load of each dwelling unit of the apartment house 1. PCS42 is connected to the power grid 80 via the first transaction meter 21 or the second transaction meter 22. The PCS 42 may flow surplus power that cannot be consumed by the dwelling loads of each dwelling unit back to the power grid 80 from among the converted power. The surplus power corresponds to the power output by the PCS 42 that exceeds the power consumption of the dwelling loads of each dwelling unit. The distributed power source 40 is not directly connected to the power grid 80, but is connected to the power grid 80 via a master meter. Thus, the first master meter 21 and the second master meter 22 can measure the amount of power supplied from the power grid 80 to the dwelling loads of each dwelling unit, and can also measure the amount of power flowing back from the distributed power source 40 to the power grid 80.

The apartment building 1 may further include a first PV breaker 411 connected between the PCS 42a and the node 212. From another perspective, the first PV breaker 411 is connected between the first master meter 21 and the first distributed power source 40a. The first PV breaker 411 may be included in the service panel 500. The apartment building 1 may further include a second PV breaker 421 connected between the PCS 42b and the node 222. From another perspective, the second PV breaker 421 is connected between the second master meter 22 and the second distributed power source 40b. The second PV breaker 421 may be included in the service panel 500. By including the first PV breaker 411 and the second PV breaker 421, the apartment building 1 can disconnect the distributed power source 40 from the dwelling unit or the power grid 80. For example, construction work involving a power outage, such as the installation, replacement, or repair of distributed power sources 40, can be performed while maintaining power supply from the power grid 80 to each dwelling unit. If a short circuit or overload occurs in the wiring to the distributed power source 40, the PV breaker can be turned off to disconnect the wiring from the master meter and the dwelling unit meter. Also, if a ground fault or overload occurs in the PV 41 or PCS 42 of the distributed power source 40, the PV breaker can be turned off to safely disconnect the wiring from the master meter and the dwelling unit meter.

The apartment house 1 and the power supply device 10 according to this embodiment supply output power from a power supply source corresponding to each unit to a power supply destination, which is a unit of a first dwelling unit 31 or a second dwelling unit 32 including a plurality of dwelling units of the apartment house 1. The distributed power sources 40 serving as the power supply source are divided into units of the power supply destination. In other words, the distributed power sources 40 serving as the power supply source in this embodiment do not distribute output power to a plurality of power supply destinations. The power supply source corresponding to one power supply destination may be composed of one distributed power source 40 or may be composed of multiple distributed power sources 40. At least one distributed power source 40 constituting one power supply source corresponding to one power supply destination is also referred to as a group of distributed power sources 40. When the power supply source and the power supply destination are in one-to-one correspondence, the self-consumption rate at the power supply destination can be grasped based on the value of the output power measured by the distributed power source 40 itself. In addition, even if the meter that measures the output power of the distributed power source 40 or the dwelling meter is not a certified meter, the self-consumption rate at the power supply destination can be determined.

The apartment house 1 may further include a common load 38. The common load 38 is connected to the power grid 80 via the common meter 28 and the common breaker 281. The common load 38 is a power load provided in the common area of the apartment house 1. The common area may be, for example, a corridor or a staircase of the apartment house 1. The common load 38 may include equipment provided in the common area, 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 conditioning equipment. The common load 38 may or may not be connected to the distributed power source 40. In this embodiment, the common load 38 is not connected to the distributed power source 40. The power consumption of the common load 38 is often small. In addition, the power consumption of lighting accounts for a large portion of the power consumption of the common load 38. Therefore, the power consumption of the common load 38 during the day is often even smaller, and it is difficult to contribute to the self-consumption of the output power of the distributed power source 40. By not connecting the common load 38 to the distributed power source 40, a decrease in the self-consumption rate of the output power of the distributed power source 40 can be avoided. The apartment building 1 may further include a distributed power source 40 connected to the common load 38. The distributed power source 40 connected to the common load 38 can function as an emergency power source for the common space during a power outage. The distributed power source 40 connected to the common load 38 may include a small-scale solar power generation facility. Even if the apartment building 1 does not include a distributed power source 40 connected only to the common load 38, the common load 38 may be connected to the first distributed power source 40a connected to the first dwelling unit 31 or the second distributed power source 40b connected to the second dwelling unit 32.

The determination of ZEH in an apartment building 1 may be performed for each dwelling unit, or for the entire apartment building 1, but it can also be performed for each dwelling unit. Since ZEH determination is performed for each dwelling unit, each dwelling unit is required to be clearly separated by fixed partitions and grouped so that they do not have shared areas. A group that meets the conditions to be a unit for ZEH determination can be formed, for example, by grouping dwelling units on one floor of the apartment building 1 as one dwelling unit. Also, a group that meets the conditions to be a unit for ZEH determination can be formed, for example, by grouping dwelling units that are lined up vertically across multiple floors of the apartment building 1 as one dwelling unit.

In the determination of ZEH, an index used for evaluation in accordance with the Building-Housing Energy-efficiency Labeling System (BELS) may be calculated. BELS is displayed as a reduction rate from the standard value of primary energy consumption, conformity to the standard, or a five-level star mark according to performance (BEI). The index and method used for the evaluation of BELS are based on the envelope performance and primary energy consumption. The evaluation method is based on the energy conservation standard. The BELS index for the unit of the dwelling unit that is the subject of the ZEH determination can be calculated based on the capacity of the solar cell system array connected to the unit that is the subject of the ZEH determination. In other words, the number of inputs of the solar cell system array capacity increases as the unit that is the subject of the ZEH determination becomes finer. Here, the number of inputs of the solar cell system array capacity required to calculate the BELS index can be reduced by apportioning and calculating the solar cell system array capacity by the building area of the unit that is the subject of the ZEH determination.

<Self-consumption rate>
Of the power output by the distributed power source 40, the power consumed by the dwelling load to which the power is supplied is also referred to as self-consumption power. Of the power output by the distributed power source 40, the power consumed by the dwelling load to which the power is supplied, in other words, the ratio of the power that is self-consumed, is also referred to as the self-consumption rate. The self-consumption rate is calculated as the ratio of the amount of self-consumption power of the dwelling load to the amount of output power of the distributed power source 40 in a specified period. In this embodiment, the specified period is set to one day. The specified period is not limited to one day and may be set to another length.

The daily self-consumption rate is higher when the daily time-varying pattern of the output power of the distributed power source 40 is closer to the daily time-varying pattern of the power consumption of the dwelling load. For example, if the output power of the distributed power source 40 is generated by solar power, the output power is higher during the day. Therefore, if the power consumption of the dwelling load is higher during the day, the self-consumption rate of that dwelling load will be higher.

However, the tendency for the power consumption of the dwelling load of each dwelling unit to change over time differs depending on the lifestyle patterns of the residents of each dwelling unit. For example, if the resident of dwelling unit 31-1 lives in a pattern where he is not at home during the day, the power consumption of the dwelling load of dwelling unit 31-1 will be low during the day. This will result in a low self-consumption rate for dwelling unit 31-1. On the other hand, if the resident of dwelling unit 31-2 lives in a pattern where he is at home during the day, the power consumption of the dwelling load of dwelling unit 31-2 will be high during the day. This will result in a high self-consumption rate for dwelling unit 31-2. In this way, the self-consumption rate of the dwelling load of each dwelling unit can differ greatly.

<Compared to when each dwelling unit is considered a power supply destination>
Assume that each dwelling unit in the apartment building 1 is regarded as a separate power supply destination. In other words, assume that the dwelling unit 31-1 and the dwelling unit 31-2 are separated as separate power supply destinations. Also assume that the output power of the distributed power source 40 that serves as the power supply source for the dwelling unit 31-1 and the output power of the distributed power source 40 that serves as the power supply source for the dwelling unit 31-2 have the same time change pattern that is larger during the day. In this case, the self-consumption rate of the dwelling unit 31-1 that consumes less power during the day is lower than the self-consumption rate of the dwelling unit 31-2 that consumes more power during the day. It is not easy to change the specifications of the magnitude of the output power of the distributed power source 40 that serves as the power supply source for each dwelling unit to match the life pattern of the resident of each dwelling unit. The reason why it is not easy to change the specifications is that it is costly to change them, or that it may be necessary to change them when the resident changes.

On the other hand, the apartment building 1 and power supply device 10 according to this embodiment can supply power from a group of distributed power sources 40 to the first dwelling unit 31, which includes N1 dwelling units 31-1 to N1. The lifestyle patterns of the residents of the dwelling units 31-1 to N1 are likely to be different. Therefore, when viewed as a whole in the first dwelling unit 31, the total power consumption of the dwelling unit loads of the dwelling units 31-1 to N1 is leveled. By leveling the power consumption, the time-varying pattern of the power consumption in the entire first dwelling unit 31 is less likely to fluctuate. Therefore, the influence of the lifestyle patterns of the residents of each unit in the first dwelling unit 31 on the self-consumption rate in the entire first dwelling unit 31 can be reduced. In addition, by determining the specifications of the output power of the group of distributed power sources 40 according to the magnitude of daytime power consumption in the time-varying pattern of the power consumption in the entire first dwelling unit 31, the self-consumption rate in the entire first dwelling unit 31 can be increased.

In addition, if each dwelling unit in the apartment building 1 is considered to be a separate power supply destination, the ZEH determination is carried out for each dwelling unit. This means that a ZEH determination needs to be carried out for each dwelling unit. On the other hand, with the apartment building 1 according to this embodiment, the ZEH determination can be carried out for each dwelling unit. Therefore, the number of ZEH determinations can be reduced from the number of dwelling units to the number of dwelling units.

<Example of grouping of dwelling units>
3 and 4, a two-story apartment building 1 is assumed. The apartment building 1 has rooms 101, 102, and 1XX on the first floor, and rooms 201, 202, and 2XX on the second floor.

In the example of FIG. 3, the first dwelling unit 31 includes the dwelling units on the first floor. The second dwelling unit 32 includes the dwelling units on the second floor. Rooms 101, 102, and 1XX located on the first floor are represented as dwelling units 31-1, 31-2, and 31-N1, respectively. Rooms 201, 202, and 2XX located on the second floor are represented as dwelling units 32-1, 32-2, and 32-N2, respectively. In the example of FIG. 3, it can be said that the dwelling units are grouped by floor. By grouping the dwelling units by floor in this way, the wiring from the group of distributed power sources 40 as the power supply source to each dwelling unit as the power supply destination can be consolidated by floor. As a result, the wiring work can be made easier. Each floor is referred to as the first floor, the second floor, etc. for distinction. The "first floor" may mean the first floor or a floor above the second floor. "Second floor" may mean the second floor, the first floor, or any floor above the third floor.

In the example of FIG. 4, the first dwelling unit section 31 includes rooms 101 and 201. Rooms 101 and 201 are represented as dwelling units 31-1 and 31-2, respectively. The second dwelling unit section 32 includes rooms 1XX and 2XX. Rooms 1XX and 2XX are represented as dwelling units 32-1 and 32-2, respectively. That is, the first dwelling unit section 31 and the second dwelling unit section 32 each include dwelling units arranged vertically. The windows of the dwelling units arranged vertically may all face south or west, for example. The magnitude or time-varying pattern of the power consumption of the dwelling unit load may be correlated with the orientation of the windows of the dwelling units. By grouping the dwelling units arranged vertically, the specifications of a group of distributed power sources 40 may be determined based on the power consumption determined corresponding to the orientation of the windows of each group.

In addition, in an apartment building 1, vertically aligned dwelling units may have the same floor plan. The magnitude of power consumption or the time-varying pattern of the dwelling unit load may be correlated with the floor plan of the dwelling unit. By grouping vertically aligned dwelling units, the specifications of a group of distributed power sources 40 may be determined based on the power consumption determined for each floor plan.

In addition, in an apartment building 1, vertically aligned dwelling units may be corner dwelling units or middle dwelling units sandwiched between other dwelling units. Vertically aligned dwelling units may be grouped together to form a group of corner dwelling units or middle dwelling units. The specifications of a group of distributed power sources 40 may be determined based on the power consumption determined according to whether the dwelling unit is a corner dwelling unit or a middle dwelling unit. In the following, the magnitude or time-varying pattern of the power consumption of the dwelling unit load due to the orientation or layout of the windows is also referred to as the characteristics of the dwelling unit.

The dwelling units of the apartment building 1 may be grouped in various other patterns without being limited to the above example. For example, the dwelling units of the apartment building 1 may be grouped so that the difference between the sums of the floor areas of the grouped dwelling units is small. Specifically, the dwelling units of the apartment building 1 may be grouped so that the difference between the sums of the floor areas of the grouped dwelling units is less than a predetermined value. By reducing the difference between the sums of the floor areas, it becomes easier to determine the ZEH for the group of dwelling units. The predetermined value may be, for example, the floor area of one dwelling unit. The predetermined value may be the floor area of one dwelling unit with the smallest floor area in the apartment building 1. The predetermined value may be the smaller of the first area, which is the floor area of one dwelling unit with the smallest floor area, and the second area, which is the difference in floor area between the dwelling unit with the largest floor area and the dwelling unit with the smallest floor area.

<Compared to when all dwelling units are considered as one power supply destination>
Let us assume that all the units in the apartment building 1 are regarded as one power supply destination. In this case, a group of distributed power sources 40 will supply power to all the units in the apartment building 1. In this case, regardless of the characteristics of each unit in the apartment building 1, the specifications of the distributed power sources 40 will be determined according to the average characteristics of all the units in the apartment building 1.

On the other hand, the apartment building 1 and power supply device 10 according to this embodiment groups some of the dwelling units of the apartment building 1 to supply power to them. This enables grouping according to the characteristics of the dwelling units. The specifications of the distributed power sources 40 that supply power to each group can be determined to suit the characteristics of the dwelling units included in each group. In this way, the self-consumption rate of the output power of the distributed power sources 40 in each group can be increased. As a result, the self-consumption rate of the apartment building 1 as a whole can be increased. Furthermore, by increasing the self-consumption rate in each dwelling unit, it becomes easier to determine that each dwelling unit is a ZEH in the ZEH determination for each dwelling unit.

In addition, if all the dwelling units in the apartment building 1 are considered to be one power supply destination, a group of distributed power sources 40 will supply power to all the dwelling units in the apartment building 1. Therefore, the output power capacity of the group of distributed power sources 40 is made large. However, distributed power sources 40 with a large output power capacity are expensive to install and operate.

The output power of the distributed power sources 40 may be reverse-flowed to the power grid 80. If the amount of power reverse-flowed across the power grid 80 increases and the power supplied to the power grid 80 may exceed the power demand, the power company may instruct the distributed power sources 40 to perform output control to limit their output power. The greater the output power capacity of the distributed power sources 40, the more likely they are to receive output control instructions. Thus, a distributed power source 40 with a large output power capacity is more likely to be subject to output control. A distributed power source 40 whose output power capacity is less than a predetermined value is excluded from being subject to output control. For example, a distributed power source 40 whose output power capacity is less than 10 kW may be excluded from being subject to output control.

In addition, if all the units in the apartment building 1 are considered to be a single power supply destination, all the units in the apartment building 1 will receive power from the power grid 80 at once. Depending on the number of units in the apartment building 1, the contract to receive power from the power grid 80 may be a high-voltage contract. If a high-voltage contract is entered into, additional costs will be incurred, such as the installation of high-voltage equipment and the appointment of a manager.

In addition, if all the dwelling units in the apartment building 1 are considered to be a single power supply destination, the capacity of the master meter needs to be increased. In addition, if a meter is installed to measure the output power of the distributed power source 40, the capacity of the meter needs to be increased. For example, if the capacity of the meter exceeds 120 A, the size of the meter needs to be significantly increased compared to when the capacity is 120 A or less. Increasing the size of the meter increases costs.

For the above reasons, if all the units in the apartment building 1 were considered to be one power supply destination, the number of units in the apartment building 1 would be limited due to limitations on the output power capacity of the distributed power source 40 and limitations on the power receiving capacity from the power grid 80.

On the other hand, the apartment building 1 and power supply device 10 according to this embodiment group some of the dwelling units in the apartment building 1 as the power supply destinations. This allows a group of dwelling units such as the first dwelling unit section 31 to be configured as the power supply destination so that the output power capacity of a group of distributed power sources 40 can be limited to within a predetermined value and power consumption can be leveled out, regardless of the total number of dwelling units in the apartment building 1. As a result, there is greater freedom in the number of dwelling units in the apartment building 1 as a whole when designing an apartment building 1 that enables power consumption leveling.

<Installation location of PCS42, etc.>
5, the PCS 42a for the first distributed power source 40a and the PCS 42b for the second distributed power source 40b may be installed together in one location in the apartment building 1. In this way, installation work or maintenance of the PCS 42 can be easily carried out.

As shown in FIG. 6, the PCS 42a and 42b may be installed in the first dwelling unit 31 and the second dwelling unit 32, respectively. In this way, the wiring from the PCS 42 to the dwelling load of each dwelling unit to which the power is supplied can be shortened. In addition, the wiring connecting the PCS 42 and the dwelling load is less likely to be confused with the wiring connecting the PCS 42 and the dwelling load of another group. The arrangement of the PCS 42 illustrated in FIG. 6 is difficult to realize when all the dwelling units of the apartment house 1 are regarded as one power supply destination, but is easily realized by grouping the dwelling units of the apartment house 1 into dwelling units. In addition, the inlet panel 500 may be provided for each dwelling unit. For example, the inlet panel 500 provided in the first dwelling unit 31 may include a main breaker 81, a first transaction meter 21, a first branch breaker 211, a first PV breaker 411, a first dwelling meter 23, and a first dwelling breaker 231. The service panel 500 provided in the second dwelling unit 32 may include a main breaker 81, a second utility meter 22, a second branch breaker 221, a second PV breaker 421, a second dwelling meter 24, and a second dwelling breaker 241. Also, a service panel including the main breaker 81, the first utility meter 21, the second utility meter 22, and a common area utility meter may be provided separately from the service panel 500 provided in the first dwelling unit 31 and the second dwelling unit 32. The service panel 500 provided in the first dwelling unit 31 may include a first branch breaker 211, a first PV breaker 411, a first dwelling meter 23, and a first dwelling breaker 231. The service panel 500 provided in the second dwelling unit 32 may include a second branch breaker 221, a second PV breaker 421, a second dwelling meter 24, and a second dwelling breaker 241.

<PV41 angle or direction>
7, the PV 41 may be installed so that its normal faces the sun 5. When the normal of the PV 41 faces the sun 5, the solar irradiance intensity of the sunlight received by the PV 41 is maximized. In other words, by installing the PV 41 at the same altitude as the sun 5, the PV 41 can receive the sunlight with a large power density and increase the output power.

Sun 5S represents the summer sun, and is located in a direction represented by a two-dot chain line having an angle represented by θ1 with respect to the vertical direction represented by the one-dot chain line. Sun 5W represents the winter sun, and is located in a direction represented by a two-dot chain line having an angle represented by θ2 with respect to the vertical direction represented by the one-dot chain line. The position of Sun 5 is closer to the zenith in summer, and closer to the horizon in winter. In other words, θ1 is smaller than θ2.

Depending on their location, the dwelling units in the apartment complex 1 may include dwelling units that are prone to getting hot in the summer and dwelling units that are prone to getting cold in the winter. Dwelling units that are prone to getting hot in the summer may consume a lot of electricity in the summer. Dwelling units that are prone to getting cold in the winter may consume a lot of electricity in the winter. For example, dwelling units on higher floors may be prone to getting hot in the summer due to the rise of heat inside the apartment complex 1 or solar radiation on the roof or rooftop of the apartment complex 1. Dwelling units on lower floors may be prone to getting cold in the winter due to radiative cooling from the surrounding land. Corner dwelling units may be prone to getting hotter during the daytime in summer than middle dwelling units due to solar radiation on the walls. Dwelling units with many west-facing windows may be prone to getting hot in the summer due to exposure to the setting sun.

Dwelling units that tend to get hot in the summer may be grouped together as a dwelling unit. The power consumption in the summer in a dwelling unit that tends to get hot in the summer may be greater than the power consumption in the winter. In this case, the distributed power source 40 that supplies power to the dwelling unit that includes the dwelling unit that tends to get hot in the summer may be configured to output more power in the summer than in the winter. The PV41 of the distributed power source 40 that supplies power to the dwelling unit that includes the dwelling unit that tends to get hot in the summer is represented as PV41S. The PV41S is installed so that its normal faces the summer sun 5S. When the PV41 is installed so that it faces the summer sun 5S, it can output more power in the summer than when it is installed to match the average altitude of the sun 5.

Dwelling units that tend to get cold in the winter may be grouped together as a dwelling unit. The power consumption in winter in a dwelling unit that includes dwelling units that tend to get cold in the winter may be greater than the power consumption in summer. In this case, a distributed power source 40 that supplies power to a dwelling unit that includes dwelling units that tend to get cold in the winter may be configured to output more power in winter than in summer. The PV41 of the distributed power source 40 that supplies power to a dwelling unit that includes dwelling units that tend to get cold in the winter is represented as PV41W. The PV41W is installed so that its normal faces the winter sun 5W. When the PV41 is installed so that it faces the winter sun 5W, it can output more power in winter than when it is installed to match the average altitude of the sun 5.

Dwelling units with many west-facing windows can easily become hot in the evening when they receive western sunlight. Therefore, dwelling units with many west-facing windows may be grouped together as a dwelling unit. The power consumption in the evening of a dwelling unit that includes dwelling units with many west-facing windows may be greater than the power consumption in the morning or around noon. In this case, the distributed power source 40 that supplies power to a dwelling unit that includes dwelling units with many west-facing windows may be configured to output greater power in the evening than the power output in the morning or around noon.

PV41 is often installed facing the direction where the sun's altitude is highest, as shown by the dashed line PV41H in FIG. 8. The direction where the sun's altitude is highest is south in the northern hemisphere and north in the southern hemisphere. FIG. 8 shows an example of the installation orientation of PV41 in the northern hemisphere. In FIG. 8, the south direction is the direction toward the front of the page. The west direction is the direction toward the left of the page. By installing PV41 facing the direction where the sun's altitude is highest, the amount of power that PV41 can generate throughout the day can be increased. On the other hand, PV41 may be installed facing the sun located on the west side in the evening, as shown by the solid line PV41Y in FIG. 8. In this way, PV41Y can output more power in the evening than when installed like PV41H.

As described above, the dwelling units of the apartment building 1 equipped with the power supply device 10 can be divided into multiple dwelling units based on various characteristics. The apartment building 1 according to this embodiment can change the arrangement of the PV 41 of the distributed power source 40 that supplies power to each dwelling unit based on the characteristics of that dwelling unit. As a result, the self-consumption rate of the output power of the distributed power source 40 in the apartment building 1 can be increased.

<Storage battery>
The apartment house 1 and the power supply device 10 may further include a storage battery. The storage battery is connected in parallel to the distributed power source 40. When the storage battery is connected in parallel to the first distributed power source 40a shown in FIG. 1, it is connected between the first PV breaker 411 and the PCS 42a. When the storage battery is connected in parallel to the second distributed power source 40b shown in FIG. 1, it is connected between the second PV breaker 421 and the PCS 42b. The storage battery may charge surplus power that is not consumed by the dwelling load of the dwelling unit among the output power of the distributed power source 40. The storage battery may discharge the charged power at the timing when the output power of the distributed power source 40 is reduced, and supply it to the dwelling load. By providing the storage battery to the apartment house 1, the self-consumption rate of the output power of the distributed power source 40 can be further increased. In addition, the surplus power can be reduced by further increasing the self-consumption rate by the storage battery. By reducing the surplus power, it is possible to reduce the amount of power that cannot be reverse-flowed and is wasted if the distributed power source 40 in the apartment building 1 according to this embodiment were to become subject to output control.

<Retraction board 500>
As shown in Fig. 9, the intake panel 500 includes a first section 510, a second section 520, a third section 530, a fourth section 540, and a fifth section 550. The first section 510 is equipped with a main breaker 81. The second section 520 is equipped with a first master meter 21 and a second master meter 22. The third section 530 is equipped with a first branch breaker 211 and a second branch breaker 221, and a first PV breaker 411 and a second PV breaker 421. The fourth section 540 is equipped with a first dwelling meter 23 and a second dwelling meter 24. The fifth section 550 is equipped with a first dwelling breaker 231 and a second dwelling breaker 241. The second section 520 in which the first master meter 21 and the second master meter 22 are installed is also referred to as a master meter section. The fourth section 540 in which the first dwelling meter 23 and the second dwelling meter 24 are installed is also referred to as the dwelling meter section.

The first section 510 is located at the end of the intake panel 500. This makes it easier to connect the wiring between the power grid 80 and the main breaker 81. The first section 510 and the second section 520 are adjacent to each other. This allows the wiring from the main breaker 81 to the first and second meter 21 and 22 to be shortened. The second section 520 and the third section 530 are adjacent to each other. This allows the wiring from the first and second meter 21 and 22 to the first and second branch breakers 211 and 221 to the first and second branch breakers 221 to the second and third meter 221 to be shortened. The third section 530 and the fourth section 540 are adjacent to each other. This allows the wiring from the first and second branch breakers 211 and 221 and the first and second PV breakers 411 and 421 to the first and second meter 23 and meter 24 to the second and third meter 221 to be shortened. The fourth section 540 and the fifth section 550 are adjacent to each other. This allows the wiring from the first dwelling meter 23 and the second dwelling meter 24 to the first dwelling breaker 231 and the second dwelling breaker 241 to be shortened. Furthermore, the third section 530 may be adjacent to the first section 510 and the second section 520. This allows the wiring to be shortened and space saving to be realized. Furthermore, the fourth section 540 may be adjacent to the second section 520 and the third section 530. This allows the wiring to be shortened and space saving to be realized. Furthermore, the direction in which the first section 510 and the third section 530 are arranged may coincide with the direction in which the second section 520 and the fourth section 540 are arranged. This makes it easier for the worker to understand the position of each part in the retraction board 500. As described above, the wiring inside the retraction board 500 can be shortened as a whole. This allows the wiring work in the retraction board 500 to be easier. Furthermore, space saving inside the retraction board 500 can be realized. It is also possible to reduce power loss in the wiring. From a macroscopic perspective, the wiring in the service panel 500 illustrated in FIG. 9 can be said to be connected in a zigzag pattern from the main breaker 81 connected to the power grid 80 to the dwelling breaker connected to the dwelling load.

The second section 520 in which the first master meter 21 and the second master meter 22 are installed is separated from the fourth section 540 in which the first dwelling meter 23 and the second dwelling meter 24 are installed. The master meters are managed by the power company and sealed by the power company so that they cannot be freely touched by anyone other than power company workers. On the other hand, the dwelling meters are managed by the management entity of the apartment building 1, and maintenance work etc. are carried out as appropriate. By separating the section in which the dwelling meters are installed from the section in which the master meters are installed, work on the dwelling meters can be easily carried out even if the master meters are sealed.

The first master meter 21 and the first dwelling meter 23 connected to the first dwelling unit 31 are mounted side by side in the vertical direction. The second master meter 22 and the second dwelling meter 24 connected to the second dwelling unit 32 are mounted side by side in the vertical direction. In this way, the master meter and the dwelling meter connected to the same dwelling load are mounted side by side in the same direction, thereby reducing the possibility of wiring errors. In addition, the multiple wires connecting the first branch breaker 211 and each of the multiple first dwelling meters 23 may be bundled with a cable tie or the like. The multiple wires connecting the second branch breaker 221 and each of the multiple second dwelling meters 24 may be bundled with a tie such as a cable tie or a tie tube. This also reduces the possibility of wiring errors.

In the example of FIG. 9, the first section 510 that connects to the power grid 80, the third section 530 that connects to the distributed power source 40, and the fifth section 550 that connects to the dwelling unit are located on the right side. In other words, in the intake panel 500, all of the parts from which the wiring that connects to the external configuration is pulled out are located on the right side. This can make it easier to pull out the wiring from the intake panel 500. In addition, the appearance of the intake panel 500 with the wiring pulled out can be made more beautiful.

The arrangement of each of the sections from the first section 510 to the fifth section 550 may be reversed left to right, up to down, diagonally reversed, or rotated 90 degrees.

The intake panel 500 may include a terminal block 560, as illustrated in FIG. 10, at a portion where the first and second transaction meters 21 and 22 are connected to the first and second branch breakers 211 and 221. The terminal block 560 is also referred to as a transaction terminal block. The terminal block 560 may be located in the second section 520 or the third section 530.

The terminal block 560 has a sign 561, for example, marked "first," to clearly indicate that the first transaction meter 21 and the first branch breaker 211 are connected to each other. The terminal block 560 has a sign 562, for example, marked "second," to clearly indicate that the second transaction meter 22 and the second branch breaker 221 are connected to each other. In this way, the possibility of a wiring error, such as connecting the second branch breaker 221 to the first transaction meter 21, can be reduced.

The intake panel 500 may include a terminal block 570, as illustrated in FIG. 11, at a portion where the wiring connected from the first branch breaker 211 to the first dwelling meter 23 and the wiring connected from the second branch breaker 221 to the second dwelling meter 24 branch off. The terminal block 570 is also referred to as a branch terminal block. The terminal block 570 may be located in the third section 530 or in the fourth section 540.

The terminal block 570 has a first terminal 575 for connecting the wiring from the first residential meter 23 and a second terminal 576 for connecting the wiring from the second residential meter 24. The wiring from the first commercial meter 21 may be connected to the first terminal 575 via the terminal block 560 and the first branch breaker 211. The wiring from the second commercial meter 22 may be connected to the second terminal 576 via the terminal block 560 and the second branch breaker 221. In other words, the terminal block 570 may have a first terminal 575 for connecting the first commercial meter 21 and the first residential meter 23, and a second terminal 576 for connecting the second commercial meter 22 and the second residential meter 24. The terminal block 570 has a sign 571 that is written, for example, as "first" to clearly indicate that the first branch breaker 211 and the first residential meter 23 are connected to each other. The terminal block 570 has a sign 572, for example, marked "Second," to clearly indicate that the second branch breaker 221 and the second dwelling meter 24 are connected to each other. The signs 571 and 572 make it possible to distinguish the first terminal 575 from the second terminal 576. In this way, the wiring worker can easily understand that the wiring from the first dwelling meter 23 is to be connected to the first terminal 575, and the wiring from the second dwelling meter 24 is to be connected to the second terminal 576. As a result, the possibility of a wiring error, such as connecting the second dwelling meter 24 to the first branch breaker 211, can be reduced.

The multiple wires connected from the terminal block 570 to the first dwelling meter 23 may be bundled, for example, with a binder 573. The multiple wires connected from the terminal block 570 to the second dwelling meter 24 may be bundled, for example, with a binder 574. These wires may be bundled as close as possible to the parts connected to the first dwelling meter 23 and the second dwelling meter 24. By bundling the wires connected to each dwelling unit, the possibility of a wiring error, such as some of the multiple wires being connected to the wrong dwelling unit, can be reduced.

The figures illustrating the embodiments of the present disclosure are schematic. The dimensional ratios and other details in the drawings do not necessarily correspond to the actual ones.

Although the embodiments of the present disclosure have been described based on the drawings and examples, it should be noted that a person skilled in the art would be able to easily make various modifications or corrections based on the present disclosure. Therefore, it should be noted that these modifications or corrections are included in the scope of the present disclosure. For example, the functions included in each component can be rearranged so as not to cause logical inconsistencies, and multiple components can be combined into one or divided.

In this disclosure, descriptions such as "first" and "second" are identifiers for distinguishing the configuration. Configurations distinguished by descriptions such as "first" and "second" in this disclosure may have their numbers exchanged. For example, the first dwelling unit may exchange identifiers "first" and "second" with the second dwelling unit. The exchange of identifiers is performed simultaneously. The configurations remain distinguished even after the exchange of identifiers. Identifiers may be deleted. Configurations from which identifiers have been deleted are distinguished by symbols. Descriptions of identifiers such as "first" and "second" in this disclosure alone should not be used to interpret the order of the configurations or to justify the existence of identifiers with smaller numbers.

1 Apartment building 5 (5S, 5W) Solar 10 Power supply device 21, 22 First master meter, second master meter 211, 221 First branch breaker, second branch breaker 212, 222 Node 23, 24 First dwelling unit meter, second dwelling unit meter 231, 241 First dwelling unit breaker, second dwelling unit breaker 28 Common area master meter 281 Common area breaker 31 First dwelling unit (31-1, 31-N1: dwelling unit)
32 Second dwelling unit (32-1, 32-N2: dwelling unit)
38 Common area load 40 (40a, 40b) Distributed power source (first distributed power source, second distributed power source)
41 (41a, 41b, 41S, 41W, 41Y, 41H) Solar cell (PV)
42 (42a, 42b) Power conditioner (PCS)
411, 421 First PV breaker, second PV breaker 500 Intake panel (510: first section, 520: second section, 530: third section, 540: fourth section, 550: fifth section)
560 terminal block (561, 562: sign)
570 Terminal block (571, 572: sign, 573, 574: binding tool, 575: first terminal, 576: second terminal)
80 Power grid 81 Main breaker

Claims (17)

a first master meter and a second master meter respectively connected between an apartment building having a plurality of dwelling units and a power grid;
the first master meter is connected to a first dwelling unit including at least two of the dwelling units and to a first distributed power source capable of reverse power flow, the first distributed power source having specifications that match the characteristics of the first dwelling unit, and supplying power to the first dwelling unit;
the second master meter is connected to a second dwelling unit including at least two of the dwelling units and to a second distributed power source capable of reverse power flow, the second distributed power source having specifications that match the characteristics of the second dwelling unit, and supplying power to the second dwelling unit;
At least two dwelling units included in the first dwelling unit section and at least two dwelling units included in the second dwelling unit section are grouped based on a change pattern of power consumption of a dwelling unit load of each dwelling unit.
Power supply device. The power supply device according to claim 1, wherein the dwelling units included in the first dwelling unit and the dwelling units included in the second dwelling unit are grouped based on the floor on which each dwelling unit is located. The power supply device according to claim 1 or 2, wherein the dwelling units included in the first dwelling unit and the dwelling units included in the second dwelling unit are grouped based on whether each dwelling unit is located on a high floor or a low floor. the first master meter measures an amount of power that is a sum of an amount of power supplied from the power grid to the first dwelling unit and an amount of power supplied to the first distributed power source;
4. The power supply device according to claim 1, wherein the second master meter measures the total amount of electricity supplied from the power grid to the second dwelling unit and the total amount of electricity supplied to the second distributed power source. The first distributed power source and the second distributed power source are further included,
at least a portion of the first distributed power source is located in the first dwelling unit;
The power supply device according to claim 1 , wherein at least a portion of the second distributed power source is located in the second dwelling unit. a service board on which the first master meter and the second master meter are mounted,
The power supply device described in any one of claims 1 to 5, wherein the inlet panel has a marking indicating that the wiring connected to the first master meter is connected to the first dwelling unit, and a marking indicating that the wiring connected to the second master meter is connected to the second dwelling unit. a first dwelling unit section including at least two dwelling units;
a second dwelling unit section including at least two dwelling units;
a power grid; a first master meter connected between a first distributed power source capable of reverse power flow, the first distributed power source having specifications that match the characteristics of the first dwelling unit and supplying power to the first dwelling unit ; and
a second master meter connected between the power grid, a second distributed power source capable of reverse power flow, the second distributed power source having specifications that match the characteristics of the second dwelling unit and supplying power to the second dwelling unit; and
Equipped with
An apartment building, wherein at least two dwelling units included in the first dwelling unit section and at least two dwelling units included in the second dwelling unit section are grouped based on a change pattern of power consumption of the dwelling unit load of each dwelling unit. The apartment building of claim 7, wherein the dwelling units included in the first dwelling unit section and the dwelling units included in the second dwelling unit section are grouped based on the floor on which each dwelling unit is located. The apartment building according to claim 7 or 8, wherein the dwelling units included in the first dwelling unit section and the dwelling units included in the second dwelling unit section are grouped based on whether each dwelling unit is located on a high floor or a low floor. A first distributed power source connected to the first dwelling unit;
The apartment building according to claim 7 , further comprising: a second distributed power source connected to the second dwelling unit. Further comprising a first solar panel connected to the first dwelling unit and a second solar panel connected to the second dwelling unit,
The apartment building described in claim 10, wherein the orientation in which the first solar power generation panel is installed and the orientation in which the second solar power generation panel is installed are each determined according to the pattern of changes in power consumption in each of the first dwelling unit and the second dwelling unit. Further comprising a first power conditioner connected between the first dwelling unit and the first solar power generation panel, and a second power conditioner connected between the second dwelling unit and the second solar power generation panel,
The first power conditioner is located in the first dwelling unit,
The apartment building of claim 11 , wherein the second power conditioner is located in the second dwelling unit. The apartment building according to claim 12, wherein the output power capacity of each of the first power conditioner and the second power conditioner is less than 10 kW. A service panel to be installed in an apartment building having a plurality of dwelling units, each of which is grouped into a first dwelling unit section or a second dwelling unit section based on a change pattern of power consumption of a dwelling unit load of each dwelling unit, such that each of the first dwelling unit section and the second dwelling unit section includes at least two dwelling units,
a master meter section in which a first master meter is installed, the first master meter being connected to a power grid and a first distributed power source capable of reverse power flow, the first distributed power source having specifications that match the characteristics of the first dwelling unit and supplying power to the first dwelling unit, and a master meter section in which a second master meter is installed, the second master meter being connected to the power grid and a second distributed power source capable of reverse power flow, the second distributed power source having specifications that match the characteristics of the second dwelling unit and supplying power to the second dwelling unit;
A service panel comprising: a dwelling meter section in which a plurality of first dwelling meters connected between the first master meter and the first dwelling section, and a plurality of second dwelling meters connected between the second master meter and the second dwelling section are mounted. The service panel of claim 14, wherein the first and second master meters are sealed by a power company. a terminal block for connecting the first master meter to each of the first dwelling meters or for connecting the second master meter to each of the second dwelling meters;
The terminal block has a first terminal for connecting a wiring from the first dwelling meter and a second terminal for connecting a wiring from the second dwelling meter, and has a marking that enables the first terminal and the second terminal to be distinguished. The intake panel according to any one of claims 14 to 16, in which the direction in which the first master meter and each of the first dwelling meters are mounted side by side coincides with the direction in which the second master meter and each of the second dwelling meters are mounted side by side.

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