JP7309821B2 - Power system and management equipment - Google Patents

Description

The present disclosure relates to power management systems and apartment complexes.

A configuration is known in which collective power reception is performed in collective housing (see, for example, Patent Document 1).

JP 2017-17779 A

Even in the case where each house in a collective housing equipped with a distributed power supply receives electricity, each house is required to enjoy the merits of the distributed power supply.

An object of the present disclosure is to provide a power management system and a collective housing in which each unit of the collective housing that receives power for each house can enjoy the merits of a distributed power supply.

A power system according to an embodiment of the present disclosure is a power system for a collective housing including a first dwelling unit and a second dwelling unit, and includes a first dwelling unit meter, a second dwelling unit meter, and a transaction meter. The first dwelling unit meter measures the power consumption of a load of the first dwelling unit that receives power from both a distributed power source and a power grid powered by a power supplier. The second dwelling unit meter measures the power consumption of a load of the second dwelling unit that receives power from the power grid but does not receive power from the distributed power source. The transaction meter is connected between each of the first dwelling unit load and the second dwelling unit load and the power grid. The first dwelling meter and the second dwelling meter send data to a different management device than the transaction meter sends data to.

A management device according to an embodiment of the present disclosure is a management device different from a destination to which a transaction meter connected to a power grid transmits data, and is a power grid to which power is supplied from a distributed power source and a power supplier. A first dwelling meter measuring the power consumption of a load in a first dwelling that receives power from both, and a load in a second dwelling that receives power from the grid but does not receive power from the distributed source. Data is received from a second dwelling meter to be measured, said first dwelling unit and said second dwelling unit being included in the same apartment complex.
A power system according to an embodiment of the present disclosure is a power system for a collective housing including a first dwelling unit and a second dwelling unit. a first dwelling meter for measuring the power consumption of a load in the first dwelling unit that receives power from the grid, and a load for the second dwelling unit that receives power from the power grid but does not receive power from the distributed power source; a first transaction meter connected between said first dwelling meter and said power grid; and said second dwelling unit receiving power from said power grid but not from said distributed power source . a second transaction meter for measuring power consumption of the load. The first dwelling meter and the second dwelling meter send data to a management device different from the one to which the first transaction meter and the second transaction meter send data.

According to the power management system and collective housing according to an embodiment of the present disclosure, each house in the collective housing that receives power for each house can enjoy the merits of the distributed power supply.

1 is a block diagram showing a configuration example of a power management system according to an embodiment; FIG. FIG. 4 is a block diagram of a system according to a comparative example; 1 is a perspective view showing an example of a collective housing with distributed power sources; FIG. 4 is a flow chart showing an example of a procedure of a method for determining the number of PCSs in the power management system; 4 is a flow chart showing an example of a procedure of a method for determining the number of PCSs in the power management system;

As shown in FIG. 1 , a collective housing 1 according to one embodiment includes a power management system 10 , a first dwelling unit load 41 a , a second dwelling unit load 41 b , and distributed power sources 60 . The first dwelling unit load 41 a and the second dwelling unit load 41 b are collectively referred to as the dwelling unit load 41 .

The housing complex 1 may be in various forms such as condominiums, apartments, or maisonettes. The dwelling unit load 41 is an electric power load provided in each unit of the collective housing 1, and may be, for example, electrical equipment such as a lighting fixture, a refrigerator, a television, or an air conditioner used in each unit. The number of each of the first dwelling unit load 41a and the second dwelling unit load 41b is not limited to one, and may be two or more.

The first dwelling unit load 41a is connected to the power grid 80 via the first transaction meter 21a. The second dwelling unit load 41b is connected to the power grid 80 via the second transaction meter 21b. The first transaction meter 21 a and the second transaction meter 21 b are collectively referred to as transaction meter 21 . The dwelling unit load 41 is connected to the power grid 80 via the transaction meter 21 and receives power supplied to the power grid 80 from the power company. The transaction meter 21 is managed by an electric power company. Transaction meter 21 measures the amount of power supplied from power grid 80 to connected dwelling unit load 41 . Transaction meter 21 may be a certified electricity meter. A certified watt-hour meter is also called a certified meter. The transaction meter 21 is connected to an electric power company server 82 managed by the electric power company through a communication line represented by a dashed line, and outputs measurement results to the electric power company server 82 .

The power management system 10 includes a first dwelling unit meter 22a and a second dwelling unit meter 22b. The first dwelling unit meter 22a measures the power consumption of the first dwelling unit load 41a. The second dwelling unit meter 22b measures the power consumption of the second dwelling unit load 41b. The first dwelling unit meter 22 a and the second dwelling unit meter 22 b are collectively referred to as the dwelling unit meter 22 . The power management system 10 may further include a management device 20 . The management device 20 is connected to a dwelling unit meter 22 via a communication line indicated by a dashed line, and acquires measurement results from the dwelling unit meter 22 . The management device 20 is connected to a housing complex management server 84 managed by the management body of the housing complex 1 via a communication line indicated by a dashed line, and outputs measurement results to the housing complex management server 84 . The managing subject is an owner of the collective housing 1 or a housing management manufacturer who manages the collective housing 1 or the like.

The distributed power supply 60 is connected to the first dwelling unit load 41a and supplies electric power to the first dwelling unit load 41a. The distributed power source 60 includes a photovoltaic power generator (hereinafter also referred to as PV) 61 and a power conditioner (hereinafter also referred to as PCS) 62 . When the power output from the PV 61 and the PCS 62 exceeds the power consumption of the first dwelling unit load 41 a , surplus power is reversely flowed to the power network 80 . The first transaction meter 21a connected to the distributed power supply 60 calculates the amount of power supplied from the power network 80 to the first dwelling unit load 41a and the amount of power reversely flowed from the distributed power supply 60 to the power network 80. Measure. The second transaction meter 21b, which is not connected to the distributed power supply 60, measures the amount of power supplied from the power grid 80 to the second dwelling unit load 41b.

The PV 61 may be replaced by other renewable energy power generation facilities such as wind power generation facilities. The PCS 62 controls power output from the PV 61 by, for example, converting DC power output from the PV 61 into AC power. The PCS 62 may include inverters, converters, or the like. Distributed power source 60 may include storage batteries and fuel cells. The number of PV 61 and PCS 62 is not limited to one, and may be two or more. For example, the PV 61 may be installed on the roof of the collective housing 1 or may be installed on the roof of the parking lot of the collective housing 1 .

The electric power company concludes a power receiving contract with the managing entity of the collective housing 1 regarding the transaction meter 21 connected to each dwelling unit load 41 . The electric power company supplies power from the power network 80 to the dwelling unit load 41 based on the power receiving contract, and measures the amount of power supplied to the dwelling unit load 41 by the transaction meter 21 . The electric power company server 82 acquires the measurement result of the transaction meter 21 and calculates the electricity rate corresponding to the amount of electric power supplied from the power network 80 based on the measurement result. The electric power company charges the management body of the housing complex 1 with the electricity charges based on the measurement result of the transaction meter 21 .

The management device 20 is connected to the collective housing management server 84 , acquires the measurement result of the power consumption in the dwelling unit load 41 from the dwelling unit meter 22 , and outputs it to the collective housing management server 84 . The collective housing management server 84 allocates an electricity rate to each dwelling unit load 41 based on the measurement result of the power consumption. The collective housing management server 84 may allocate an electricity rate to each dwelling unit load 41 based on a predetermined rule. The predetermined rule may be appropriately set by the manager of the housing complex 1 . The management body of collective housing 1 charges the electricity charges assigned to each dwelling unit load 41 to the residents of the dwelling units in which the dwelling unit load 41 is provided.

The amount of power supplied from the power network 80 to the first dwelling unit load 41 a that receives power from both the power network 80 and the distributed power supply 60 is smaller than when power is not received from the distributed power supply 60 . That is, when the power consumption of the first dwelling unit load 41a and the second dwelling unit load 41b is the same, the electricity rate based on the measurement result of the first transaction meter 21a connected to the first dwelling unit load 41a is It becomes cheaper than the electricity rate based on the measurement result of the 2nd transaction meter 21b connected to the load 41b. When the power supplied from the distributed power source 60 is reversely flowed to the power network 80 and sold, the electricity bill based on the measurement result of the first transaction meter 21a is reduced by the amount of the power sold.

In this embodiment, the management entity of the housing complex 1 is billed for the electricity charges based on the measurement results of the first transaction meter 21a and the second transaction meter 21b. The electricity rate based on the measurement result of the first transaction meter 21a becomes cheaper due to the power supplied from the distributed power source 60, or becomes lower as the power is sold. Separately from the electricity charges charged to the managing entity of the collective housing 1, each dwelling unit load is charged to each dwelling unit load based on the power consumption of each dwelling unit load 41, which is the measurement result of each dwelling unit meter 22. 41 is connected to the distributed power source 60 or not, the electricity rate for each house is determined. By doing so, electricity charges can be fairly billed between dwelling units to which power is supplied from the distributed power source 60 and dwelling units to which power is not supplied from the distributed power source 60 . As a result, even the residents of the dwelling units in which the second dwelling unit load 41 b that is not connected to the distributed power source 60 is provided can enjoy the merit of the distributed power source 60 being provided in the collective housing 1 .

In the system according to the comparative example shown in FIG. 2, a distributed power source 60 is connected to each transaction meter 21 . That is, the distributed power supply 60 is connected to each house. In the comparative example, the resident of each house concludes a power receiving contract for each house with an electric power company. In this case, the power consumption of the dwelling unit load 41 in each house is covered by the power supplied from the distributed power supply 60, so that the power supplied from the power network 80 to the dwelling unit load 41 of each house is reduced. As a result, residents of each house can enjoy the benefits of the distributed power supply 60 .

However, when the installation conditions of the panels of the PV 61 in each house are different, the amount of electric power supplied from the PV 61 in each house to the dwelling unit load 41 is different. The amount of electric power supplied from the distributed power supply 60 is determined by, for example, the orientation of the panel of the PV 61, the sunshine duration of the panel of the PV 61, or the like. Due to the difference in the amount of power supplied from the distributed power supply 60 of each house under the power receiving contract, there is an unfairness in the merit of the reduction in electricity charges by the distributed power supply 60 enjoyed by the residents of each house.

In the system according to the comparative example, the number of PCS 62 is increased by connecting distributed power sources 60 to each house. As the number of PCS 62 increases, the installation space for PCS 62 increases. As a result, the installation cost of the PCS 62 increases, and the exterior image of the housing complex 1 may deteriorate.

When the housing complex 1 is a building of two or more stories, and the PCS 62 is provided in the space of each unit, the PCS 62 is provided in the dwelling unit on the second or higher floor. If the heavy PCS 62 is installed on the second floor or higher, the cost of the building designed with the installation of the PCS 62 in mind may increase, and the installation work cost of the PCS 62 may increase.

In the collective housing 1 according to the present embodiment, regardless of whether or not the dwelling unit load 41 is connected to the distributed power source 60 or the amount of power output by the distributed power source 60, the distributed type that the residents of each unit enjoy The merit of the electricity bill reduction by the power supply 60 can be set fairly. In other words, the distributed power supply 60 may not be installed in all dwelling units, or may be installed under different conditions in each dwelling unit.

When distributed power sources 60 are installed in some dwelling units of collective housing 1 having two or more floors, the number of PCS 62 is reduced, and the necessity of installing heavy PCS 62 on floors above the second floor is reduced. . For example, as shown in FIG. 3, PCS 62 may be provided only in the first floor dwelling unit. By doing so, the cost of the PCS 62, the cost of the building, and the cost of the installation of the PCS 62 may be reduced.

The housing complex 1 according to this embodiment includes a transaction meter 21 for each house. As a result, each resident can sign a power receiving contract with a power company. However, in the present embodiment, a power receiving contract for the transaction meter 21 of each house is concluded between the managing body of the housing complex 1 and the electric power company. In other words, the residents of each house do not conclude a power receiving contract with the power company. By doing so, the resident of each house can save the trouble of signing a power receiving contract with the electric power company when moving in.

Power supplied by the distributed generation 60 may be reversed to the power grid 80 if a power contract is in place for the transaction meter 21 to which the distributed generation 60 is connected. The power supplied from the distributed power source 60 is not flowed back to the power grid 80 if there is no power receiving contract for the transaction meter 21 to which the distributed power source 60 is connected. By making a power receiving contract for each house between the management entity of the housing complex 1 and the power company, the power supplied from the distributed power source 60 can be reversely flowed to the power network 80 regardless of the presence or absence of residents. As a result, the power supplied from the distributed power source 60 can be effectively used.

The housing complex 1 according to the present embodiment further includes a dwelling unit meter 22 for each unit, with which the manager of the housing complex 1 can obtain the measurement result. When charging the electricity charges to the residents of each unit, the management body of the collective housing 1 sets the charge for each unit based on the measurement result of the dwelling unit meter 22 of each unit, regardless of the measurement result of the transaction meter 21 of each unit. amount can be determined. The management entity of the collective housing 1 can determine the charge amount for each unit by appropriately setting a predetermined rule for allocating the electricity charge to each dwelling unit load 41 . In other words, the manager of the housing complex 1 has more freedom in determining the amount to be charged for each unit.

The management entity of the housing complex 1 may determine the billing amount for each house in consideration of the amount of electricity sold for the power reversely flowed from the distributed power source 60 to the power network 80 . For example, as the amount of power reversely flowed from the distributed power source 60 to the power network 80 in one month increases, the billing amount for each house may be reduced.

The management entity of the housing complex 1 may determine the amount to be charged for each unit in consideration of the daytime power consumption of each unit. As the amount of power consumption during the daytime in the housing complex 1 decreases, the amount of power reversely flowed from the distributed power source 60 to the power grid 80 can increase. Based on the amount of power sold for the power reversely flowed to the power network 80, the billing amount for a dwelling unit that consumes less power during the daytime may be reduced.

The management body of collective housing 1 may set a rent including an electricity charge for each unit when concluding a rental contract with a resident of each unit. In order to encourage tenants to move into the collective housing 1, the manager of the collective housing 1 may set a predetermined rule to reduce or eliminate the electricity charge for a predetermined period. The management entity of the collective housing 1 may set a predetermined rule so that the electricity charges for each unit are determined based on the occupancy rate of the collective housing 1 . The manager of the housing complex 1 may set a predetermined rule so as to determine the electricity rate for each unit based on the tenancy period of each unit. As a result, the management entity of the housing complex 1 can provide residents with various contract systems, thereby improving customer attraction and improving serviceability for residents.

A net-zero-energy house has been proposed as an energy-saving measure for houses. The net zero energy house is also called ZEH (net Zero Energy House). By self-consumption of the electric power supplied from the distributed power supply 60 by the dwelling unit load 41 in the collective housing 1, the entire collective housing 1 or each unit of the collective housing 1 can be recognized as a ZEH.

If the amount of power supplied from the distributed power source 60 to the entire housing complex 1 or to each unit satisfies a predetermined condition, the housing complex 1 can be recognized as a ZEH. The number of PV 61 panels and the number of PCS 62 provided in the housing complex 1 may be determined so that the housing complex 1 is recognized as a ZEH. A ZEH that is realized for each residential building of the collective housing 1 is also called a ZEH-M. The number of PV 61 panels and the number of PCS 62 connected to each house may be determined so that each house is recognized as a ZEH-M. The apartment complex 1 may include dwelling units that are approved as ZEH and dwelling units that are not approved as ZEH-M.

The number of panels of the PV 61 connectable to one PCS 62 may be determined based on the capacity of the PCS 62 . If the number of panels of the PV 61 exceeds the number of panels connectable to one PCS 62 even by one, an additional PCS 62 is required. Even if the PV 61 has only one panel, one PCS 62 is required. When the panels of PV 61 installed in collective housing 1 are divided into several groups, PCS 62 are connected to each group. In other words, the PCS 62 is divided into groups corresponding to the panels of the PV 61 and connected to each group. When the panel group of the PV 61 is associated with the first dwelling unit load 41a, the PCS 62 is divided into groups corresponding to the first dwelling unit load 41a. By optimizing the number of panels included in each group obtained by dividing the panels of the PV 61, the number of PCS 62 is minimized as a whole.

The number of panels of PV 61 and the number of PCS 62 shall be determined so that collective housing 1 is recognized as ZEH-M. The number of PCSs 62 can be minimized based on methods including the flow chart procedures illustrated in FIGS. The method may be performed, for example, by a designer or by an apparatus. In this embodiment, it is assumed that the apparatus performs the method illustrated in FIGS. The device may be a general-purpose computer or the like.

The device sets the parameters necessary to minimize the number of PCSs 62 (step S1). The parameters may be entered into the device by an operator of the device. Parameters may be obtained from other devices. The parameters may include the capacity of the power equipment of each unit of the apartment complex 1 or the capacity of the main power equipment of the apartment complex 1 . The capacity of each household's power equipment is also referred to as each household's installed capacity. The capacity of main power equipment is also called main equipment capacity. The parameters may include the number of units in the apartment complex 1 . Parameters may include the capacity of one PCS 62 . The parameters may include an overinput magnification in the case of overinputting the PV 61 panel to one PCS 62 . The overload factor can be expressed as the ratio of the PV capacity that can actually be input to PCS 62 to the nominal capacity of PCS 62 . Parameters may include the PV capacity required for apartment complex 1 to qualify as a ZEH-M.

The device calculates the minimum number of PCS 62 based on the parameters (step S2). The minimum number of PCS 62 shall be represented as Mmin. The device calculates the product of the excess input scale factor and the capacity of the PCS 62 as the PCS input upper limit. The device divides the number of units in the apartment complex 1 from the PV capacity required for the entire apartment complex 1 as the PV capacity required per unit for the apartment complex 1 to be recognized as a ZEH. The device calculates the number of PCS 62 required per household by dividing the PV capacity required per household by the PCS input upper limit and rounding up the result to an integer. When the PCS 62 is installed in each unit of the collective housing 1, the device calculates the number of PCS 62 required for the entire collective housing 1 by multiplying the number of PCS 62 required per unit by the number of dwelling units. The device regards the number of PCS 62 required for the entire housing complex 1 calculated up to this point as Mmin.

The device sets the number for dividing the panel of the PV 61 to 0 (step S3). Let the number of divisions of the panel of PV 61 be denoted as N1. For example, if N1 is 3, the panels of PV61 are divided into 3 groups.

The device increases the value of N1 by 1 (step S4).

The device determines whether N1 is less than or equal to the number of dwelling units (step S5).

If N1 is not less than the number of dwelling units (step S5: NO), the device outputs Mmin (step S6). Mmin can be updated by the procedure of step S16, which will be described later. The device outputs Mmin calculated in step S2 or updated Mmin in step S16. After the procedure of step S6, the apparatus ends the procedure of the flow charts of FIGS.

When N1 is equal to or less than the number of dwelling units (step S5: YES), the device calculates the number of PCS 62 per group obtained by dividing the panel of PV 61 (step S11 in FIG. 5). The number of PCS 62 per group obtained by dividing the panel of PV 61 is represented as MP. As MP, the device divides the PV capacity required for the entire apartment complex 1 in order for the apartment complex 1 to be recognized as a ZEH-M by N1, further divides by the PCS input upper limit, and rounds up the result to an integer. calculate.

The device calculates the number of PCS 62 required when dividing the panel of PV 61 into N1 groups (step S12). The number of PCSs 62 required for the entire housing complex 1 when the panels of the PV 61 are divided into N1 groups is represented by M1. The device calculates the product of MP and N1 as M1.

The apparatus determines whether the installed capacity of each house is equal to or greater than the product of the capacity of the PCS 62 and the MP (step S13). In other words, the device determines whether the number of PCS 62 in one group is equal to or less than the number of PCS 62 that can be connected to the power equipment provided in one unit of the housing complex 1 .

If the installed capacity of each house is not equal to or greater than the product of the capacity of the PCS 62 and the MP (step S13: NO), the apparatus proceeds to step S4 of FIG. When the installed capacity of each house is equal to or greater than the product of the capacity of the PCS 62 and MP (step S13: YES), the device determines whether the main installed capacity is equal to or greater than the product of the capacity of the PCS 62 and M1 (step S14). In other words, the device determines whether the number of PCS 62 required for the entire housing complex 1 is less than or equal to the number that can be connected to the main power equipment of the housing complex 1 .

If the trunk facility capacity is not equal to or greater than the product of the capacity of the PCS 62 and M1 (step S14: NO), the apparatus proceeds to step S4 in FIG. When the trunk facility capacity is equal to or greater than the product of the capacity of the PCS 62 and M1 (step S14: YES), the device determines whether M1 is less than Mmin (step S15).

If M1 is not less than Mmin (step S15: NO), the device proceeds to step S4 in FIG. When M1 is less than Mmin (step S15: YES), the device substitutes the value of M1 as the value of Mmin (step S16). That is, the device updates the value of Mmin to a smaller value. The device may store the value of N1 when Mmin is updated. After the procedure of step S16, the apparatus proceeds to the procedure of step S4 in FIG.

As described above, the device can calculate the minimum number of PCS 62 by updating the value of Mmin according to the procedures of the flowcharts of FIGS.

In the housing complex 1 according to the present embodiment, the number of PV 61 panels and the number of PCS 62 may be determined so that at least some of the dwelling units are recognized as ZEHs. In this case, the parameters may include the PV capacity required for at least some units of the apartment complex 1 to qualify as ZEHs. The number of PCSs 62 may be determined under certain conditions regardless of whether the entire apartment complex 1 is recognized as a ZEH-M or whether each unit of the apartment complex 1 is recognized as a ZEH. Even in these cases, the number of PCSs 62 can be minimized based on the method of appropriately modifying the procedures of the flow charts illustrated in FIGS. 4 and 5 .

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

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

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

1 collective housing 10 power management system 20 management device 21 (21a, 21b) transaction meter (first transaction meter, second transaction meter)
22 (22a, 22b) Dwelling unit meter (1st dwelling unit meter, 2nd dwelling unit meter)
41 (41a, 41b) Dwelling unit load (first dwelling unit load, second dwelling unit load)
60 Distributed power supply 61 Photovoltaic power generation (PV)
62 Power conditioner (PCS)
80 power network 82 power provider server 84 collective housing management server

Claims (7)

A power system for a collective housing including a first dwelling unit and a second dwelling unit,
a first dwelling unit meter for measuring the power consumption of a load of the first dwelling unit that receives power from both a distributed power source and a power grid powered by a power provider;
a second dwelling meter for measuring power consumption of a load in said second dwelling that receives power from said power grid but does not receive power from said distributed power source;
a transaction meter connected between each of the first dwelling unit load and the second dwelling unit load and the power grid ;
The power system wherein the first dwelling meter and the second dwelling meter transmit data to a different management device than the transaction meter transmits data to. A management device different from the one to which the custody meter connected to the power grid sends data,
a first dwelling unit meter for measuring power consumption of a load in a first dwelling unit that receives power from both a distributed power source and a power grid powered by a power utility; and a second dwelling unit meter measuring power consumption of a load in a second dwelling unit that does not receive power from a power source, wherein said first dwelling unit and said second dwelling unit are included in the same apartment complex. A power system for a collective housing including a first dwelling unit and a second dwelling unit,
a first dwelling unit meter for measuring the power consumption of a load of the first dwelling unit that receives power from both a distributed power source and a power grid powered by a power provider;
a second dwelling meter for measuring power consumption of a load in said second dwelling that receives power from said power grid but does not receive power from said distributed power source;
a first transaction meter connected between the first dwelling meter and the power grid;
a second transaction meter for measuring power consumption of a load of said second dwelling unit that receives power from said power grid but does not receive power from said distributed power source ;
The electric power system, wherein the first dwelling meter and the second dwelling meter transmit data to a management device different from the one to which the first transaction meter and the second transaction meter transmit data. The distributed power supply includes a power conditioner,
4. The electric power system according to claim 1, wherein said power conditioner is connected to said distributed power supply and is installed in a part of the first floor of a housing complex having two or more floors. The distributed power supply includes a power conditioner,
4. The electric power system according to claim 1, wherein said power conditioner is connected to said distributed power supply and installed only in a dwelling unit on the first floor of a housing complex with two or more floors. 6. The power system of any one of claims 1, 3, 4 or 5, wherein the first dwelling meter and the second dwelling meter are different from a transaction meter managed by the power utility. Claim 1, comprising a housing management server that allocates electricity charges to each of said first dwelling unit and said second dwelling unit based on measurement results of power consumption in each of said first dwelling unit meter and said second dwelling unit meter. 7. The power system according to any one of clauses 3, 4, 5 or 6.

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