JP7084285B2 - Drop-in board, power supply system, and apartment building - Google Patents

Description

The present disclosure relates to a drop board, a power supply system, and a wiring connection method.

A configuration is known in which collective power is received in an apartment house (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2017-17779

There are many existing apartments that receive power from each house. It is required to facilitate the work of changing from receiving power to each house to receiving power collectively in an existing property.

An object of the present disclosure is to provide a service board, a power supply system, and a wiring connection method that can easily change from individual power receiving to collective power receiving in an existing property.

The service board according to the embodiment of the present disclosure includes a first interface, a second interface, and a batch transaction meter. The first interface can be connected to a power receiving board for each house connected to a plurality of dwelling unit loads receiving power from the power grid under a power receiving contract for each house. The batch transaction meter is used to receive power from the power grid under a batch power receiving contract. The second interface can connect the dwelling unit load disconnected from the power receiving board of each house to the power grid via the collective transaction meter without a power receiving contract from the power grid.

The power supply system according to the embodiment of the present disclosure includes a power receiving board connected to a plurality of dwelling unit loads receiving power from the power grid under a power receiving contract for each house, and a collective power receiving board connected to the power receiving board of each house. And. The collective power receiving board has a collective transaction meter for receiving power from the power grid under a collective power receiving contract. The collective power receiving board has an interface capable of connecting a dwelling unit load separated from each house power receiving board to the power grid via the collective transaction meter in a state where a power receiving contract from the power grid is not concluded. ..

The apartment house according to the embodiment of the present disclosure is provided with a drop-in board. The service board has a first interface that can be connected to a plurality of dwelling unit loads that receive power from the power grid under a power receiving contract, a collective transaction meter for receiving power from the power grid under a collective power receiving contract, and a dwelling unit load that is separated from the power grid. Is provided with a second interface that can be connected to the power grid via the batch transaction meter.

According to the service board, the power supply system, and the wiring connection method according to the embodiment of the present disclosure, it is possible to easily change from the power reception of each house to the collective power reception in the existing property.

It is a block diagram which shows the structural example of the electric power supply system which concerns on one Embodiment. It is a block diagram which shows the configuration example which changed the connection destination of the load to the 2nd lead-in board in the power supply system of FIG. It is a block diagram which shows an example of the composition of the existing property which does not have a 2nd drop board. It is a block diagram which shows the structural example of the 2nd pull-in board which does not have a meter. It is a flowchart which shows an example of the procedure of the wiring connection method which concerns on one Embodiment. It is a block diagram which shows an example of the configuration which changed the connection destination of a shared load and a distributed power source to a 2nd lead-in board. It is a block diagram which shows an example of the structure which changed the connection destination of a part of a dwelling unit load to a 2nd lead-in board. It is a block diagram which shows an example of the structure which the meter of the 1st pull-in board was moved to the 2nd pull-in board.

As shown in FIG. 1, the power supply system 100 according to the embodiment includes a first lead-in board 10 and a second lead-in board 20. The power supply system 100 is installed in the apartment house 1. The apartment house 1 includes a load 40. The load 40 includes a shared load 41 and a dwelling unit load 42. The power supply system 100 is connected to the load 40.

The apartment house 1 may be in various forms such as a condominium, an apartment, or a maisonette. The apartment house 1 may be managed by a management entity. The management entity of the apartment house 1 may be the owner of the apartment house 1, the business operator who manages the apartment house 1, or the like. The management entity of the apartment house 1 may individually conclude a occupancy contract with the resident of each dwelling unit.

The shared load 41 is a power load provided in the common portion of the apartment house 1. The common area may be, for example, a corridor or stairs of an apartment house 1. The shared load 41 may include equipment provided in the common portion, for example, lighting equipment such as an outdoor light, emergency equipment such as a septic tank blower power supply, a fire alarm, and other equipment such as air conditioning equipment. The dwelling unit load 42 is a power load provided in each dwelling unit of the housing complex 1, and may be, for example, an electric device such as a lighting fixture, a refrigerator, a television, or an air conditioner used in each dwelling unit. The apartment house 1 includes a plurality of dwelling units. It is assumed that each dwelling unit is provided with a dwelling unit load 42. That is, it is assumed that the apartment house 1 includes a plurality of dwelling unit loads 42.

The power supply system 100 may further include a distributed power source 60. The distributed power source 60 includes a photovoltaic power generation (hereinafter, also referred to as PV) 62 and a power conditioner (hereinafter, also referred to as PCS) 61. PV62 may be replaced with other renewable energy power generation equipment such as wind power generation equipment, or may be used in combination. The PCS 61 controls the power output from the PV 62 by converting the DC power output from the PV 62 into AC power or the like. The PCS 61 may include an inverter, a converter, or the like. The distributed power source 60 may include a storage battery and a fuel cell. The number of PV62 and PCS61 is not limited to one, and may be two or more. For example, the PV 62 may be divided into the roof of the apartment house 1, the roof of the parking lot of the apartment house 1, the site of the apartment house 1, and the like. In the present embodiment, it is assumed that the power supply system 100 includes a distributed power source 60.

The first lead-in board 10 is connected to the power grid 50. The first lead-in board 10 has a first power receiving unit 11 and may be connected to the power grid 50 by the first power receiving unit 11.

The first lead-in board 10 is connected to the load 40. The first lead-in board 10 has a first load connecting portion 13, and may be connected to the load 40 by the first load connecting portion 13. The first service board 10 includes a shared transaction meter 31 and a dwelling unit transaction meter 32. The shared transaction meter 31 is connected between the first power receiving unit 11 and the first load connecting unit 13 connected to the shared load 41. The dwelling unit transaction meter 32 is connected between the first power receiving unit 11 and the first load connecting unit 13 connected to each dwelling unit load 42. The shared transaction meter 31 measures the amount of electric power supplied from the power grid 50 to the shared load 41. The dwelling unit transaction meter 32 measures the amount of electric power supplied from the power grid 50 to each dwelling unit load 42. The first lead-in board 10 may have a first meter connection portion 18. The shared transaction meter 31 and the dwelling unit transaction meter 32 may be attached to the first lead-in board 10 at the first meter connection portion 18. The first lead-in board 10 may have a breaker between the shared transaction meter 31 and the first load connecting portion 13 to cut off the shared load 41 from the power grid 50. The first lead-in board 10 may have a breaker between the dwelling unit transaction meter 32 and the first load connecting portion 13 to cut off each dwelling unit load 42 from the power grid 50.

When the shared load 41 is connected to the power grid 50 via the shared transaction meter 31, the electric power company concludes a power receiving contract with the management entity of the apartment house 1. The electric power company supplies electric power from the electric power grid 50 to the shared load 41 based on the electric power receiving contract. The shared load 41 consumes the power received from the power grid 50. The shared transaction meter 31 measures the amount of electric power supplied from the power grid 50 to the shared load 41. The shared transaction meter 31 may be a watt hour meter with a certification. A watt-hour meter with a certification is also called a certification meter. The electric power company manages the shared transaction meter 31 and acquires the measurement result from the shared transaction meter 31. The electric power company charges the management entity of the apartment house 1 for electricity based on the measurement result of the shared transaction meter 31.

When each dwelling unit load 42 is connected to the electric power network 50 via the dwelling unit transaction meter 32, the electric power company concludes a power receiving contract with the resident of each dwelling unit of the apartment house 1. The power receiving contract that the resident of each dwelling unit concludes with the electric power company is also called the power receiving contract for each dwelling unit. In this case, the resident of each dwelling unit needs to not only conclude a contract regarding occupancy with the management entity of the apartment house 1, but also conclude a power receiving contract with the electric power company.

The electric power company supplies electric power from the electric power grid 50 to each dwelling unit load 42 based on the electric power receiving contract for each household. Each dwelling unit load 42 consumes the electric power received from the electric power grid 50. The dwelling unit transaction meter 32 measures the amount of electric power supplied from the power grid 50 to the dwelling unit load 42. The dwelling unit transaction meter 32 may be a certification meter. The electric power company manages the dwelling unit transaction meter 32 and acquires the measurement result from the dwelling unit transaction meter 32. The electric power company calculates the electricity charge corresponding to the amount of electric power supplied from the electric power grid 50 to the dwelling unit load 42 based on the measurement result of the dwelling unit transaction meter 32. The electric power company charges the resident who has a power receiving contract for each house with the electricity charge calculated based on the measurement result of the dwelling unit transaction meter 32.

The first lead-in board 10 is connected to the distributed power source 60. The first lead-in board 10 has a first interconnection unit 14, and may be connected to the distributed power source 60 at the first interconnection unit 14. The distributed power source 60 is connected between the shared transaction meter 31 and the first load connecting portion 13 connected to the shared load 41. That is, the distributed power source 60 is connected to the shared load 41 and is connected to the power grid 50 via the shared transaction meter 31. The distributed power source 60 can supply electric power to the shared load 41 by being connected to the shared load 41. When a breaker 16 that cuts off the shared load 41 from the power grid 50 is arranged between the shared transaction meter 31 and the first load connecting portion 13, the breaker 16 is a distributed power source as shown in FIG. It may be arranged off the path connecting the 60 and the shared load 41. That is, the breaker 16 is arranged closer to the first meter connection portion 18 than the branch point to the first interconnection portion 14 located between the first load connection portion 13 and the first meter connection portion 18. good. By arranging the breaker 16 on the side of the first meter connection portion 18, power can be supplied from the distributed power source 60 to the shared load 41 even in the event of a power failure in the power grid 50.

Since the distributed power source 60 is connected to the power grid 50 via the shared transaction meter 31, surplus power can be reverse-flowed to the power grid 50. The surplus power corresponds to the power that exceeds the power consumed by the shared load 41 among the power output by the distributed power source 60. The shared transaction meter 31 measures the amount of power supplied from the power grid 50 to the shared load 41, and also measures the amount of power flowd back from the distributed power source 60 to the power grid 50. The electric power company charges the management entity of the apartment house 1 an electricity charge according to the amount of electric energy supplied to the shared load 41 based on the measurement result of the shared transaction meter 31, and reverse power flow to the electric power network 50. Pay the electricity purchase fee according to the amount of electricity generated. That is, when the electricity selling charge according to the amount of reverse power flow is higher than the electricity charge according to the amount of electricity supplied to the shared load 41, the electric power company charges the management entity of the apartment house 1. pay.

All the power output by the distributed power source 60 may be reverse power flow to the power grid 50. In this case, the distributed power source 60 is connected to the power grid 50 via a watt-hour meter that measures the amount of reverse power flow without being connected to the load 40.

The first lead-in board 10 can make each dwelling unit load 42 receive power based on the power receiving contract of each unit. The first drop board 10 is also referred to as a power receiving drop board for each house.

The second lead-in board 20 is connected to the power grid 50 by a wiring branched from the first power receiving unit 11 of the first lead-in board 10. The second lead-in board 20 has a second power receiving unit 21, and may be connected to the power grid 50 by the second power receiving unit 21. The second power receiving unit 21 is also referred to as a first interface. The first interface makes the second lead-in board 20 connectable to the first pull-in board 10.

The second lead-in board 20 can be connected to the load 40. The second lead-in board 20 may have a second load connecting portion 23 and may be connectable to the load 40 by the second load connecting portion 23. The second load connection unit 23 is also referred to as a second interface. The second interface makes it possible to connect the load 40 to the second lead-in board 20. The second lead-in board 20 can be connected to the distributed power source 60. The second lead-in board 20 may have a second interconnection unit 24, and the second interconnection unit 24 may be connectable to the distributed power source 60.

The second pull-in board 20 may include a batch transaction meter 33. The batch transaction meter 33 is connected between the second load connection unit 23, the second interconnection unit 24, and the second power receiving unit 21. The second lead-in board 20 may include a dwelling unit meter 34. The dwelling unit meter 34 is connected between the batch transaction meter 33 and the second load connecting portion 23 that can be connected to the dwelling unit load 42. The second lead-in board 20 may have a second meter connection portion 28. The batch transaction meter 33 and the dwelling unit meter 34 may be attached to the second lead-in board 20 at the second meter connection portion 28. The second lead-in board 20 uses a batch transaction meter 33 and a breaker that cuts off the shared load 41 and the dwelling unit load 42 from the power grid 50 when the shared load 41 or the dwelling unit load 42 is connected to the second load connecting portion 23. 2 It may be held between the load connection unit 23 and the load connection unit 23. The second lead-in board 20 has a breaker 26 that cuts off the distributed power source 60 from the power grid 50 when the distributed power source 60 is connected to the second interconnection unit 24, and the batch transaction meter 33 and the second interconnection unit 24. May have between and. When the distributed power source 60 is connected to the second interconnection unit 24 of the second lead-in board 20, the breaker 26 that cuts off the distributed power source 60 from the power grid 50 is distributed as shown in FIG. It may be arranged off the path connecting the second interconnection unit 24 to which the type power supply 60 is connected and the second load connection unit 23 to which the shared load 41 is connected. That is, the breaker 26 is arranged closer to the second meter connecting portion 28 than the branch point to the second interconnection portion 24 located between the second load connecting portion 23 and the second meter connecting portion 28. good. By arranging the breaker 26 on the side of the second meter connection portion 28, power can be supplied from the distributed power source 60 to the shared load 41 and the dwelling unit load 42 even in the event of a power failure of the power grid 50. In the second lead-in board 20, when the dwelling unit load 42 is connected to the second load connecting portion 23, the breaker that cuts off the dwelling unit load 42 from the power grid 50 is provided by the dwelling unit meter 34 and the second load connecting portion 23. May have in between.

In the power supply system 100 shown in FIG. 2, the load 40 and the distributed power source 60 are disconnected from the first lead-in board 10 and connected to the second lead-in board 20. That is, as compared with the power supply system 100 shown in FIG. 1, the connection destination of the load 40 and the distributed power source 60 is changed to the second lead-in board 20.

The load 40 is connected to the power grid 50 via a batch transaction meter 33. In this case, it is assumed that the electric power company concludes a collective power receiving contract with the management entity of the apartment house 1. The electric power company supplies electric power from the electric power grid 50 to the apartment house 1 based on the collective power receiving contract. The load 40 included in the apartment house 1 consumes the electric power collectively received. The batch transaction meter 33 measures the amount of electric power supplied from the power grid 50 to the apartment house 1. The batch transaction meter 33 may be a certification meter. The electric power company manages the batch transaction meter 33 and acquires the measurement result from the batch transaction meter 33. The electric power company calculates the electricity charge corresponding to the amount of electric power supplied from the electric power grid 50 to the apartment house 1 based on the measurement result of the collective transaction meter 33. The electric power company charges the management entity of the apartment house 1 for the electricity charge calculated based on the measurement result of the collective transaction meter 33.

When the second lead-in board 20 includes the dwelling unit meter 34, the dwelling unit meter 34 measures the amount of electric power supplied to the dwelling unit load 42. The management entity of the apartment house 1 manages the dwelling unit meter 34 and acquires the measurement result from the dwelling unit meter 34. The management entity of the apartment house 1 may charge the resident of the dwelling unit having each dwelling unit load 42 based on the measurement result of the dwelling unit meter 34. The dwelling unit meter 34 may be a certification meter, but may not be a meter with certification. A certification meter is required when the electric power company charges the electric power charge.

The second lead-in board 20 can make each dwelling unit load 42 receive power based on a collective power receiving contract. The second lead-in board 20 is also referred to as a collective power receiving lead-in board.

When the management entity of the apartment house 1 concludes a collective power receiving contract, either a high-voltage collective power receiving contract or a low-voltage collective power receiving contract is selected. The high-voltage batch power reception contract is a contract to receive power collectively with an electric capacity equal to or higher than a predetermined value. The low-voltage batch power reception contract is a contract to receive power collectively with an electric capacity less than a predetermined value. The predetermined value is appropriately set by the electric power company. The predetermined value may be, for example, 50 kW or the like. The management entity of the apartment house 1 may conclude either a high-voltage collective power receiving contract or a low-voltage collective power receiving contract based on the number of units of the apartment house 1. Regardless of whether the high-voltage collective power receiving contract or the low-voltage collective power receiving contract is concluded, the peak cut of the power consumption can be realized by leveling the power consumption of the entire apartment house 1. As a result, the management entity of the apartment house 1 can enjoy the merit of reducing the unit price of the electricity charge by cutting the peak power consumption. By concluding a collective power receiving contract by the management entity of the apartment house 1, the resident of each dwelling unit can save the trouble of concluding the power receiving contract. When the apartment house 1 includes the distributed power source 60, the load 40 of the apartment house 1 receives electric power from the distributed power source 60 as a whole. By leveling the power consumption, the load 40 of the apartment house 1 can constantly consume the power from the distributed power source 60. As a result, self-consumption can be promoted.

As shown in FIG. 3, an apartment house 1 having a first pull-in board 10 and not having a second pull-in board 20 may exist as an existing property. In order to enable collective power reception in an apartment house 1 that does not have a second lead-in board 20, it is necessary to attach a batch transaction meter 33 to the first pull-in board 10. Since the work of attaching the batch transaction meter 33 to the first lead-in board 10 involves cutting the wiring, it is necessary to carry out the work in a state where the entire apartment house 1 is cut off. A power outage in the entire apartment building 1 impairs the convenience of the residents of the apartment building 1. If priority is given to the convenience of residents, it will be difficult for construction work to be carried out.

On the other hand, the work of changing from the configuration of receiving power to each house shown in FIG. 1 to the configuration of collective power receiving shown in FIG. 2 is carried out for the dwelling unit load 42 while the power receiving contract is not concluded for the dwelling unit load 42. By doing so, the construction work can be carried out in a state where the power is cut off for each dwelling unit load 42 without causing the power failure of the entire apartment house 1. A state in which a power receiving contract has not been concluded for the dwelling unit load 42 may occur, for example, when a resident of the dwelling unit having the dwelling unit load 42 moves out. The convenience of the resident is not impaired because the construction work is carried out at the timing when the resident moves out. As a result, construction becomes easier.

The change from the configuration shown in FIG. 3 to the configuration shown in FIG. 1 is to connect the wiring connecting the first power receiving unit 11 of the first lead-in board 10 and the second power receiving unit 21 of the second lead-in board 20 to the first power receiving unit. It can be performed by attaching to 11. By doing so, the connection of the second lead-in board 20 can be constructed without disconnecting the first lead-in board 10 from the power grid 50. That is, the configuration including the second lead-in board 20 is realized without causing a power failure in the entire apartment house 1. As a result, it becomes easier to carry out the construction while considering the convenience of the resident.

As shown in FIG. 4, when the second lead-in board 20 is not connected to both the load 40 and the distributed power source 60, the batch transaction meter 33 and the dwelling unit meter 34 may not be provided, and the batch transaction may be provided. Only a part of the meter 33 and the plurality of dwelling unit meters 34 may be provided. The state in which the second lead-in board 20 is not connected to both the load 40 and the distributed power source 60 occurs when the second lead-in board 20 is first installed between the first lead-in board 10 and the power grid 50. It can be done.

In the batch transaction meter 33, when the shared load 41 is connected to the second load connection portion 23 of the second lead-in board 20, or the distributed power source 60 is connected to the second interconnection section 24 of the second lead-in board 20. It may be installed at the time of Even if the shared transaction meter 31 located between the shared load 41 and the power grid 50 in the first service board 10 is removed from the first service board 10 and installed as a batch transaction meter 33 in the second service board 20. good.

The dwelling unit meter 34 may be installed when the dwelling unit load 42 is connected to the second load connecting portion 23 of the second lead-in board 20.

The change from the configuration of FIG. 1 to the configuration of FIG. 2 may be carried out by an operator based on a wiring connection method including the procedure illustrated in FIG.

As illustrated in FIG. 3, the operator connects the second lead-in board 20 to the configuration in which the second lead-in board 20 is not connected (step S1). By implementing step S1, the configuration of the power supply system 100 is changed from the configuration exemplified in FIG. 3 to the configuration exemplified in FIG. The operator may attach the wiring connecting the first power receiving unit 11 of the first service board 10 and the second power receiving unit 21 of the second service board 20 to the first power receiving unit 11. A main breaker may be connected between the first power receiving unit 11 of the first lead-in board 10 and the power grid 50. The main breaker may have a terminal for parallel branching the electric power received from the electric power grid 50. The first power receiving unit 11 may be connected to one of the terminals of the main breaker that branches in parallel. In the work of step S1, even if the wiring connecting the second power receiving unit 21 of the second lead-in board 20 is attached to the terminal different from the terminal to which the first power receiving unit 11 is connected among the terminals that branch in parallel of the main breaker. good.

The operator disconnects the shared load 41 from the first lead-in board 10 and connects it to the second lead-in board 20 (step S2). The operator may disconnect the shared load 41 from the first load connecting portion 13 of the first lead-in board 10. The operator may disconnect the shared load 41 from the first lead-in board 10 in a state where the shared load 41 is cut off from the power grid 50. The operator may cut off the shared load 41 from the power grid 50 by shutting off the circuit breaker located between the first load connection unit 13 and the shared transaction meter 31. The operator may connect the shared load 41 to the second load connecting portion 23 of the second lead-in board 20. The operator may connect the shared load 41 to the second lead-in board 20 in a state where the breaker located between the second load connection unit 23 and the batch transaction meter 33 is cut off.

When the power supply system 100 includes the distributed power source 60, the operator may disconnect the distributed power source 60 from the first lead-in board 10 and connect it to the second lead-in board 20 in step S2. The operator may disconnect the distributed power source 60 from the first interconnection unit 14 of the first lead-in board 10. The operator may disconnect the distributed power source 60 from the first interconnection unit 14 in a state where the first interconnection unit 14 is cut off from the distributed power source 60 and the power grid 50. The operator may cut off the first interconnection unit 14 from the power grid 50 by blocking the breaker located between the first interconnection unit 14 and the shared transaction meter 31. The operator may disconnect the first interconnection unit 14 from the distributed power source 60 by disconnecting the breaker located between the first interconnection unit 14 and the distributed power source 60. The operator may connect the distributed power source 60 to the second interconnection unit 24 of the second lead-in board 20. The operator puts the distributed power source 60 on the second lead-in board 20 in a state where the breaker located between the second interconnection unit 24 and the batch transaction meter 33 and the breaker of the distributed power source 60 are cut off. It may be connected to the dual interconnection unit 24. If the second lead-in board 20 is configured so that power is supplied from the distributed power source 60 to the shared load 41 even if the breaker is cut off, the output of the distributed power source 60 is output before the work of step S2. Work may be performed to stop. The output of the distributed power source 60 may be stopped, for example, by turning off the power of the PCS 61.

By implementing step S2, the configuration of the power supply system 100 is changed from the configuration exemplified in FIG. 1 to the configuration exemplified in FIG. In the configuration exemplified in FIG. 6, the shared load 41 is connected to the second load connecting portion 23 of the second lead-in board 20. The distributed power source 60 is connected to the second interconnection unit 24 of the second lead-in board 20.

The worker confirms whether or not there is a dwelling unit load 42 that has not received power from the power grid 50 among the dwelling unit loads 42 connected to the first lead-in board 10 (step S3). The state in which the dwelling unit load 42 is not receiving power from the power grid 50 may occur when the power receiving contract for each unit in the dwelling unit load 42 is terminated, or when the power receiving contract for each unit is not concluded. When the dwelling unit transaction meter 32 connected to the dwelling unit load 42 is a smart meter, the operator uses a terminal based on a standard such as Wi-SUN (Wireless Smart Utility Network) to receive power from the dwelling unit load 42. May be confirmed.

When the dwelling unit load 42 that has not received power from the power grid 50 does not exist (step S3: NO), the operator ends the procedure of the flowchart of FIG.

When there is a dwelling unit load 42 that has not received power from the power grid 50 (step S3: YES), the worker disconnects the dwelling unit load 42 from the first lead-in board 10 for construction and connects it to the second lead-in board 20 (step S3: YES). Step S4). The operator may disconnect the dwelling unit load 42 from the first load connecting portion 13 of the first lead-in board 10. The operator may connect the dwelling unit load 42 to the second load connecting portion 23 of the second lead-in board 20. The dwelling unit load 42 other than the dwelling unit load 42, which is the target of the work in step S4, is not cut off from the power grid 50 and can continue to receive power supply.

When a part of the dwelling unit load 42 is connected to the second lead-in board 20 in step S4, the configuration of the power supply system 100 is changed from the configuration exemplified in FIG. 6 to the configuration exemplified in FIG. 7. When all the dwelling unit loads 42 are connected to the second lead-in board 20 in step S4, the configuration of the power supply system 100 is changed from the configuration exemplified in FIG. 6 to the configuration exemplified in FIG.

After step S4, the operator ends the procedure of the flowchart of FIG.

As described above, according to the power supply system 100 and the second lead-in board 20 (collective power receiving lead-in board) according to the present embodiment, even in the apartment house 1 where there are residents, the collective power can be received from the configuration of each house. The work to change the configuration becomes easier. As a result, changes to the configuration of collective power reception in existing properties can be promoted.

As shown in FIG. 8, the shared transaction meter 31 of the first lead-in board 10 may be removed from the first pull-in board 10 and arranged on the second pull-in board 20 as a batch transaction meter 33.

The second lead-in board 20 does not have to be provided with the dwelling unit meter 34. In this case, the second meter connection 28 provided for the dwelling unit meter 34 may simply be short-circuited. Since the second lead-in board 20 is not provided with the dwelling unit meter 34, the management entity of the apartment house 1 can omit the meter reading work in each dwelling unit.

When the second lead-in board 20 does not have the dwelling unit meter 34, the management entity of the apartment house 1 may charge the resident of the dwelling unit having each dwelling unit load 42 a predetermined electricity charge. The predetermined electricity charge may be, for example, a monthly flat rate. The predetermined electricity rate may be determined based on, for example, the occupancy rate of the apartment house 1. By doing so, the occupancy rate of the apartment house 1 can be improved. The predetermined electricity rate may be determined based on the electricity selling price according to the amount of power flowing back from the distributed power source 60 provided in the apartment house 1 to the power grid 50. By doing so, the resident can enjoy the benefits of the distributed power source 60. As a result, the occupancy rate of the apartment house 1 can be improved.

The figure illustrating the embodiment according to the present disclosure is schematic. The dimensional ratios on the drawings do not always match the actual ones.

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

In the present disclosure, the description of "first", "second" and the like is an identifier for distinguishing the configuration. The configurations distinguished by the descriptions such as "first" and "second" in the present disclosure can exchange numbers in the configurations. For example, the first pull-in board can exchange the identifiers "first" and "second" with the second pull-in board. The exchange of identifiers takes place at the same time. Even after exchanging identifiers, the configuration is distinguished. The identifier may be deleted. Configurations with the identifier removed are distinguished by a code. Based solely on the description of identifiers such as "1st" and "2nd" in the present disclosure, it shall not be used as an interpretation of the order of the configurations or as a basis for the existence of identifiers with smaller numbers.

1 Apartment house 10 1st drop-in board (power receiving drop-in board for each house)
20 Second lead-in board (collective power receiving lead-in board)
11, 21 1st and 2nd power receiving parts 13, 23 1st and 2nd load connection parts 14, 24 1st and 2nd interconnection parts 18, 28 1st and 2nd meter connection parts 31 Shared transaction meter 32 Dwelling unit transaction Meter 33 Bulk transaction meter 34 Dwelling unit meter 40 Load 41 Shared load 42 Dwelling unit load 50 Power grid 60 Distributed power supply 61 Power conditioner (PCS)
62 Photovoltaic power generation (PV)
100 power supply system

Claims (6)

The first interface that can be connected to the power receiving board of each house that is connected to the loads of multiple dwelling units that receive power from the power grid under the power receiving contract of each house.
A batch transaction meter for receiving power from the power grid under a batch power reception contract,
A drop board provided with a second interface capable of connecting a dwelling unit load separated from the power receiving drop board of each house to the power grid via the collective transaction meter in a state where a power receiving contract from the power grid is not concluded. Each house's power receiving lead-in board connected to multiple dwelling unit loads that receive power from the power grid under each house's power receiving contract,
It is equipped with a collective power receiving board connected to the power receiving board of each house.
The collective power receiving board is
A batch transaction meter for receiving power from the power grid under a batch power reception contract,
A power supply system having an interface capable of connecting a dwelling unit load separated from the power receiving lead-in panel of each house to the power grid via the collective transaction meter in a state where a power receiving contract from the power grid is not concluded. A first interface that can be connected to multiple dwelling unit loads that receive power from the power grid under a power receiving contract for each house,
A batch transaction meter for receiving power from the power grid under a batch power reception contract,
With a second interface that can connect the dwelling unit load separated from the power grid to the power grid via the batch transaction meter.
A drop-in board. The drop-in board according to claim 1 or 3, further comprising a third interface capable of connecting the second interface and the distributed power source without going through the batch transaction meter. A first interface that can be connected to multiple dwelling unit loads that receive power from the power grid under a power receiving contract for each house,
A batch transaction meter for receiving power from the power grid under a batch power reception contract,
With a second interface that can connect the dwelling unit load separated from the power grid to the power grid via the batch transaction meter.
An apartment house with a drop-in board. The apartment house according to claim 5, wherein the collective power receiving contract is a low-voltage collective power receiving contract.

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