JP2020068554A - Power management method, power management system, and draw-in board - Google Patents

Abstract

To provide a power management method capable of increasing merits by collective power reception, a power management system, and a draw-in board.SOLUTION: With a power management method, power is received at a plurality of dwelling house loads from a power network by a comprehensive power reception contract S1, a first amount of power consumed in the dwelling house load is acquired when meter-rate charge based on the amount of power consumption in the dwelling house load is charged to a resident of a dwelling house using the dwelling house load S2, and fixed charge to be charged to the resident of the dwelling house using the dwelling house load is determined based on the first amount of power S3. The fixed charge is determined not based on an actual measurement value of the amount of power supplied to the dwelling unit load.SELECTED DRAWING: Figure 7

Description

  The present disclosure relates to a power management method, a power management system, and a service panel.

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

JP, 2017-17779, A

  It is necessary to increase the merit of receiving electricity collectively.

  An object of the present disclosure is to provide a power management method, a power management system, and a retractable panel that can increase the merit of collective power reception.

  A power management method according to an embodiment of the present disclosure receives power from a power grid under a collective power reception contract in a plurality of dwelling unit loads. The power management method obtains a first amount of power consumed by the dwelling unit load when using the dwelling unit load and charging a resident of a dwelling unit a pay-per-use charge based on the amount of power consumption in the dwelling unit load. . The power management method determines, based on the first power amount, a flat rate charge for a resident of a dwelling unit that uses the dwelling unit load. The flat rate is determined not to be based on an actual measurement value of the amount of electric power supplied to the dwelling unit load.

  A power management system according to an embodiment of the present disclosure includes a drawing board, a plurality of dwelling unit loads, and a management device. The pull-in board connects the power grid and the plurality of dwelling unit loads without using a dwelling unit meter that measures the amount of power supplied to each dwelling unit load. The loads of the plurality of dwelling units are received from the power grid through the service panel under a collective power reception contract. The management device uses the dwelling unit load, based on a first amount of power consumed by the dwelling unit load when charging a resident of the dwelling unit a pay-per-use charge based on the amount of power consumption in the dwelling unit load, A fixed fee to be charged to the resident of the dwelling unit using the dwelling unit load is determined. The flat rate is not based on the measured value of the amount of electric power supplied to the dwelling unit load.

  A service panel according to an embodiment of the present disclosure connects a power grid and a plurality of dwelling unit loads that receive power from the power grid under a collective power receiving contract without a dwelling unit meter that measures the amount of power supplied to each dwelling unit load. To do.

  According to the power management method, the power management system, and the service panel according to the embodiment of the present disclosure, the merits of collective power reception can be increased.

It is a block diagram showing an example of composition of a power management system concerning one embodiment. 4 is a block diagram of a system according to Comparative Example 1. FIG. It is a graph showing an example of change of power consumption of a dwelling unit load. It is a figure showing the relationship between the 1st electric energy and the 2nd electric energy. It is a figure showing the relationship between a 1st electricity rate and a 2nd electricity rate. It is a block diagram which shows the structural example of the power management system which concerns on other embodiment. It is a flow chart showing an example of the procedure of the power management method concerning one embodiment.

  As shown in FIG. 1, a power management system 100 according to an embodiment includes an apartment house 1 and a management device 20. The housing complex 1 includes a drawing board 10, a shared load 41, and a dwelling unit load 42. The shared load 41 and the dwelling unit load 42 are collectively referred to as a load 40. The housing complex 1 may not be included in the power management system 100. When the housing complex 1 is not included in the power management system 100, the power management system 100 includes the service panel 10, the management device 20, and the load 40.

  The housing complex 1 may be in various forms such as an apartment, an apartment, or a maisonette. The housing complex 1 may be managed by a management entity. The management subject of the housing complex 1 may be the owner of the housing complex 1, a business operator managing the housing complex 1, or the like. The management entity of the housing complex 1 may individually enter a contract with a resident of each dwelling unit.

  The common load 41 is an electric load provided in the common part of the housing complex 1. The common part may be, for example, a corridor or stairs of the apartment building 1. The shared load 41 may include devices provided in the shared portion, for example, lighting equipment such as an external light, a septic tank blower power source, emergency equipment such as a fire alarm, and other equipment such as an air conditioner. The dwelling unit load 42 is an electric 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 housing complex 1 includes a plurality of dwelling units. That is, the power management system 100 includes a plurality of dwelling unit loads 42.

  The drawing board 10 includes a transaction meter 21. Transaction meter 21 may have a first end 211 and a second end 212. Transaction meter 21 is assumed to be connectable to power grid 50 at first end 211. The draw-in board 10 may include a first terminal 11, and may be connected to the power grid 50 via the first terminal 11. Transaction meter 21 is assumed to be connectable to load 40 at second end 212. That is, the service panel 10 enables the power grid 50 and the load 40 to be connected via the transaction meter 21. The drawing board 10 may include a second terminal 12 and may be connected to the load 40 via the second terminal 12. In the present embodiment, the transaction meter 21 measures the amount of power supplied from the power grid 50 to the load 40 by being connected to the power grid 50 at the first end 211 and being connected to the load 40 at the second end 212.

  The management device 20 may include a device such as a server. The management device 20 is connected to the transaction meter 21 by a communication line represented by a broken line, and acquires the measurement result of the transaction meter 21.

  The power management system 100 may further include a distributed power source 60. The distributed power source 60 may or may not be included in the housing complex 1. 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. The PV 62 may be replaced with other renewable energy power generation equipment such as wind power generation equipment. 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 PVs 62 and PCSs 61 is not limited to one, and may be two or more. For example, PV62 may be divided and provided in the roof of apartment house 1, the roof of the parking lot of apartment house 1, the site of apartment house 1, etc.

  The management device 20 may be connected to the PCS 61 by a communication line represented by a broken line. The management device 20 acquires the power output from the distributed power supply 60 from the PCS 61. The power output by the distributed power supply 60 is also referred to as output power.

  The transaction meter 21 may be connectable to the distributed power source 60 at the second end 212. The drawing board 10 may include a third terminal 13 and may be connected to the distributed power source 60 via the third terminal 13. In this embodiment, the transaction meter 21 is connected to the distributed power source 60 at the second end 212. The distributed power source 60 supplies power to the load 40 by connecting to the load 40, and connects the power source 50 to the power network 50 via the transaction meter 21 to reverse flow the surplus power to the power network 50. The surplus power corresponds to the power of the output power that exceeds the power consumed by the load 40. The transaction meter 21 measures the amount of power supplied from the power grid 50 to the load 40, and also measures the amount of power reversely flown from the distributed power source 60 to the power grid 50.

  The electric power company concludes a collective power reception contract with the management entity of the housing complex 1. The electric power company supplies electric power from the electric power network 50 to the housing complex 1 based on the collective power receiving contract. The load 40 included in the housing complex 1 consumes the electric power received collectively. The transaction meter 21 measures the amount of power supplied from the power grid 50 to the housing complex 1. The transaction meter 21 may be an electric energy meter with a certification. A watt hour meter with a certification is also called a certification meter. The electric power company manages the transaction meter 21 and acquires the measurement result from the transaction meter 21. The electric power company calculates an electricity rate corresponding to the amount of electric power supplied from the electric power network 50 to the housing complex 1 based on the measurement result. The electric power company charges the management entity of the housing complex 1 with the electricity charge calculated based on the measurement result of the transaction meter 21.

  When the management entity of the housing complex 1 concludes a collective power receiving contract, either a high voltage collective receiving contract or a low voltage collective receiving contract is selected. The high-voltage collective power receiving contract is a contract for collectively receiving power with an electric capacity of a predetermined value or more. 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 determined by the electric power company. The predetermined value may be, for example, 50 kW. The management entity of the housing complex 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 housing complex 1.

  When a high-voltage bulk power reception contract is signed, it is necessary to install high-voltage power receiving equipment such as cubicles, and it is necessary to appoint a security manager such as an electric chief engineer. Can be reduced. When the number of housing units 1 is small, the electric power demand of the entire housing unit 1 may stay below a predetermined value. When the power demand of the collective housing 1 as a whole stays below a predetermined value, the management entity of the collective housing 1 may conclude a low-voltage collective power reception contract. When a low-voltage package power receiving contract is concluded, it is not necessary to install high-voltage power receiving equipment and to appoint a safety manager such as an electric chief engineer. That is, it is possible to avoid the burden of the cost of installing the high-voltage power receiving equipment and selecting the security manager. 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 collective housing 1. As a result, regardless of whether the high voltage collective power receiving contract or the low voltage collective power receiving contract is concluded, the management entity of the housing complex 1 can enjoy the merit of reducing the unit price of the electricity rate by cutting the peak of power consumption. .

  The system according to Comparative Example 1 shown in FIG. 2 includes a retractable board 90. The pull-in board 90 includes a dwelling unit meter 22 that connects the power grid 50 and each dwelling unit load 42. That is, each dwelling unit load 42 is connected to the power network 50 via the dwelling unit meter 22 without passing through the transaction meter 21. The dwelling unit meter 22 measures the amount of power consumed by each dwelling unit load 42. The dwelling unit meter 22 may be an electric energy meter that is the same as or similar to the transaction meter 21. The electric power company concludes a power receiving contract with a resident of each dwelling unit of the housing complex 1. The power receiving contract that the resident of each dwelling unit makes with the electric power company is also called a power receiving contract for each house. The electric power company charges the electricity charge to the resident who has signed the power receiving contract for each house, based on the measurement result of the dwelling unit meter 22. In this case, the resident of each dwelling unit needs to enter into not only a contract regarding the occupancy with the management entity of the housing complex 1 but also a power receiving contract with the electric power company. According to the present embodiment, the management entity of the housing complex 1 concludes a collective power receiving contract, so that the resident of each dwelling unit can save the trouble of concluding the power receiving contract.

  In the present embodiment, it is assumed that the management entity of the housing complex 1 has a low-voltage collective power reception contract with an electric power company. In this case, the load 40 of the housing complex 1 receives power as a whole under the low voltage collective power reception contract. The power consumed by the entire housing complex 1 can be leveled by the variation in the power consumption pattern of each dwelling unit load 42. The variation in the power consumption pattern of each dwelling unit load 42 may be due to the difference in the living pattern of each dwelling unit. For example, the electric power consumed in a dwelling unit, which a resident often goes out in the daytime, may decrease in the daytime and increase in the nighttime. On the other hand, there may be dwelling units that consume less power at night. When the housing complex 1 includes the distributed power source 60, the load 40 of the housing complex 1 as a whole receives power from the distributed power source 60. By leveling the power consumption, the load 40 of the housing complex 1 can constantly consume the power from the distributed power source 60. When the fluctuation range of the power consumption is large, the time period when the output power exceeds the power consumption may be longer than when the fluctuation range of the power consumption is small. When the output power exceeds the power consumption, the surplus power flows backward. In this case, the ratio of the power consumed by the load 40 to the output power may decrease. When the fluctuation range of the power consumption is small, the time period during which the output power is lower than the power consumption may be long. When the output power is smaller than the power consumption of the load 40, the output power is consumed by the load 40. The leveling of the power consumption can increase the ratio of the power consumed by the load 40 to the output power. As a result, private consumption can be promoted.

  The management entity of the housing complex 1 collects the electricity bill from the resident of each dwelling unit in order to pay the electricity bill to the electric power company. As a comparative example 2, when it is assumed that the management entity of the housing complex 1 charges the resident of each dwelling unit an electric charge based on the power consumption amount of the dwelling unit load 42 of each dwelling unit, each dwelling unit is It is necessary to have an electricity meter that measures the amount of power consumption. The electricity charge charged based on the power consumption of the dwelling unit load 42 is also referred to as a metered charge.

  On the other hand, in the present embodiment, the management entity of the housing complex 1 charges the resident of each dwelling unit a fixed amount of electricity regardless of the power consumption of the dwelling unit load 42 of each dwelling unit. That is, the management entity of the housing complex 1 charges a fixed amount of electricity charge, which is not based on the amount of electric power supplied to each dwelling unit load 42, to the resident of the dwelling unit using each dwelling unit load 42. The fixed electricity charge that is charged without being based on the power consumption of the dwelling unit load 42 is also called a fixed charge. In this case, each dwelling unit does not need to include an electricity meter that measures the amount of power consumption of each dwelling unit load 42. As a result, capital investment in the housing complex 1 can be reduced. The management entity of the housing complex 1 can omit the meter reading work in each dwelling unit.

  Residents of the housing complex 1 tend to use devices that consume electric power when they are at home, but do not operate the devices when they are absent. The graph illustrated as FIG. 3 represents changes in the power consumption of the dwelling unit load 42 and the output power in each time zone of the day. The horizontal axis and the vertical axis of the graph of FIG. 3 represent the time zone and the power, respectively. The power consumption of the dwelling unit load 42 is represented by a solid line. The power consumption of the dwelling unit load 42 tends to increase in the morning and night when the occupant is at home, while decreasing during the day when the occupant is absent. The output power is represented by the broken line. If the distributed power source 60 includes PV 62, the output power increases during the day and decreases in the morning and night.

  In the graph of FIG. 3, the hatched portion in the lower right diagonal line represents the electric power reversely flown from the distributed power supply 60 to the power grid 50. The electric power reversely flown from the distributed power source 60 to the power grid 50 is also referred to as reverse electric power flow. Of the electric power output by the distributed power source 60 during the daytime, the electric power reversely flowing to the power grid 50 is increasing. That is, of the output power, the power consumed in-house by the dwelling unit load 42 is decreasing. In the graph of FIG. 3, the hatched portion in the upper right direction represents the electric power received by the dwelling unit load 42 from the electric power network 50. The electric power received by the dwelling unit load 42 from the electric power network 50 is also referred to as received electric power. As the output power decreases in the morning and night, the power received from the power grid 50 among the power consumed by the dwelling unit load 42 in the morning and night increases.

  Residents of the housing complex 1 may not operate the device when they are absent in order to reduce the electricity bill. For example, a resident tends to operate the air conditioner when he / she is at home, but does not operate the air conditioner when he / she is absent. In this case, the resident may feel uncomfortable with the environment such as temperature and humidity in the dwelling unit when returning home. In the present embodiment, the resident of each dwelling unit is charged with the flat rate, so that the resident hardly feels reluctance to keep the air conditioner operating even during absence during the day. As a result of keeping the air conditioner operating even when the resident is absent, the resident can comfortably feel the environment such as temperature and humidity in the dwelling unit when returning home.

  By reducing factors that increase the temperature, such as the irradiation of sunlight into the dwelling unit or the inflow of outside air, the power consumption when the air conditioner is kept operating during the daytime can be reduced. The power consumption of the air conditioner can be reduced by providing the dwelling unit with excellent heat insulation performance. The daily power consumption when the air conditioner is kept operating during the day is equal to the daily power consumption when the air conditioner is stopped during the day and started at home. Power consumption can be approached. By doing so, the environmental impact of leaving the air conditioner running can be reduced.

  When the flat-rate charge is charged as the electricity charge, the resident tends to increase the power consumption of the dwelling unit load 42 by using a device that consumes power without worrying about the electricity charge. In this case, the amount of power consumption in each dwelling unit load 42 tends to be higher than that in the case where the pay-per-use charge is charged. The metered rate corresponding to the increased power consumption may be higher than the flat rate. The management entity of the housing complex 1 needs to compensate for the difference in electricity charges. Merely raising the flat rate may increase the burden on residents and reduce the occupancy rate. The flat rate can be determined so as to balance the balance of the electricity rate with the maintenance of the occupancy rate.

  The management device 20 determines the flat rate so that both the condition relating to the balance of the electricity charge and the condition relating to the occupancy rate are satisfied. The management device 20 may collect the determined flat rate from the resident of each dwelling unit by payment processing such as account transfer or credit card payment. The management device 20 may notify the resident of each dwelling unit of the determined flat rate and urge the management entity of the housing complex 1 to pay.

  The management device 20 may acquire the amount of electric power consumed by the dwelling unit load 42 when the metered charge is charged as the electric charge, and determine the flat rate based on the acquired amount of electric power. The amount of electric power consumed by the dwelling unit load 42 of one dwelling unit when the meter-rate charge is charged is also referred to as a first amount of power. The management device 20 may acquire the actual value of the first power amount. The management device 20 may acquire the predicted value of the first power amount. The electricity rate charged as the metered rate when the power consumption amount is the first electricity amount is also referred to as a first electricity rate. The management entity of the housing complex 1 can appropriately set a flat rate by the management device 20. The management entity of the housing complex 1 may determine the flat rate to be equal to or less than the first electricity rate. If the management entity of the housing complex 1 sets the flat rate to an amount less than the first electricity rate, the electricity rate of the resident becomes cheaper. As a result, the occupancy rate can be increased. On the other hand, for example, when the apartment house 1 is a highly convenient and popular property such as being near a station, the management entity of the apartment house 1 may set the flat rate equal to or higher than the first electricity rate. In this case, the management entity of the housing complex 1 can obtain a larger profit by the electricity rate. Residents can freely consume electricity without increasing the burden of electricity charges by paying a fixed amount of money that can be charged as electricity charges in normal life. In other words, all-you-can-use power is realized. The amount of power consumed by the dwelling unit load 42 of one dwelling unit when a flat rate is charged as the electricity rate is also referred to as a second amount of power. The electricity rate charged as the metered rate when the power consumption is the second energy is also referred to as the second electricity rate. The management device 20 may acquire, as the first power amount, the power consumption amount of the entire housing complex 1 when the meter-rate fee is charged. The management device 20 may acquire, as the second power amount, the power consumption amount of the entire apartment complex 1 when a flat rate is charged as the electricity price.

  It is predicted that the second amount of power will be larger than the first amount of power when the resident uses a device that consumes power without worrying about the electricity bill. On the other hand, considering that the device deteriorates as the device is used, it is unlikely that the second power amount will increase without limit. That is, the difference between the first power amount and the second power amount may be less than the predetermined value.

  For example, as shown in FIG. 4, it is assumed that the first electric energy and the second electric energy are represented by a vertical bar graph. The vertical axis of FIG. 4 represents the electric energy. It is assumed that the heights of the bar graphs representing the magnitudes of the first power amount and the second power amount are A1 and A2, respectively. A2 is larger than A1. The difference between A2 and A1 may be compensated by, for example, a part of the electric power output from the distributed power source 60. In FIG. 4, a bar graph showing the amount of electric power output from the distributed power source 60 is shown alongside the bar graphs of the first electric power amount and the second electric power amount. The amount of power output by the distributed power supply 60 is also referred to as output power amount. The difference may be compensated by the electric energy corresponding to the portion indicated by the broken line in the bar graph showing the magnitude of the output electric energy.

  For example, as shown in FIG. 5, it is assumed that the first electricity rate and the second electricity rate are represented by vertical bar graphs. The vertical axis of FIG. 5 represents the electricity rate. It is assumed that the heights of the bar graphs showing the respective sizes of the first electricity charge and the second electricity charge are B1 and B2. B2 is larger than B1. The difference between B2 and B1 may be compensated by, for example, a part of the power sale price that is the consideration when the output power is reversely flown to the power network 50. In FIG. 5, a bar graph showing the amount of power sale price is shown alongside the bar graphs of the first electricity rate and the second electricity rate. The difference may be compensated by the amount of money corresponding to the portion indicated by the broken line in the bar graph showing the amount of power sale price.

  The management device 20 may determine the flat rate based on the second electricity rate. The management device 20 determines the flat rate so that the management entity of the housing complex 1 can compensate the difference between the flat rate and the second electric rate by the selling price of the electric power reversely flown from the distributed power source 60 to the power grid 50. You can do it. That is, the management device 20 may determine the flat rate so that the difference between the flat rate and the second electricity rate is smaller than the power sale price. The management device 20 may acquire the amount of power output by the distributed power supply 60 from the PCS 61. The management device 20 may determine the flat rate based on the amount of power output from the distributed power source 60.

  The management device 20 may determine the flat rate based on the predicted value of the second power amount. The amount of electric power corresponding to the flat-rate charge is also referred to as flat-rate power amount. In other words, when the power consumption amount is the flat-rate power amount, the electricity charge charged as the metered charge is the same as the flat-rate charge. The difference between the second power amount and the flat-rate power amount may be compensated for by the power amount that the distributed power source 60 supplies to the load 40. The management device 20 may determine the flat rate so that the amount of electric power that the distributed power source 60 supplies to the load 40 is larger than the difference between the predicted value of the second electric power amount and the fixed amount of electric power. The management entity of the housing complex 1 may determine the capacity of the distributed power source 60 so that the flat rate is equal to or lower than the first electricity rate.

  The management device 20 may predict the first power amount based on the actual value of the power amount consumed in the same or similar dwelling units, and may determine the flat rate based on the prediction result of the first power amount. . By doing so, the management device 20 can accurately determine the flat-rate charge without acquiring the actual measurement value of the amount of electric power consumed in each dwelling unit of the housing complex 1.

  Energy saving standards may be established to reduce energy consumption in homes. For example, in order for a house to meet energy saving standards, it is required that the designed primary energy consumption determined by the specifications of the house be below a standard value. The design primary energy consumption of a dwelling unit may represent the energy consumed by a standard life in the dwelling unit. The management device 20 may predict the first amount of power based on the designed primary energy consumption of each dwelling unit of the housing complex 1. By doing so, the management device 20 can accurately determine the flat rate. The design primary energy consumption amount may be calculated based on the specifications of an air conditioner, a ventilation device, a lighting device, a hot water supply device, a cooking device, a household electric appliance, or the like installed in a dwelling unit. The designed primary energy consumption amount may be calculated based on the number of people living in the dwelling unit.

  When the daytime electricity rate is higher than the nighttime electricity rate, the load 40 consumes the electric power of the distributed power source 60 in the daytime and the electric power received from the power grid 50 is reduced, whereby the electricity rate can be reduced as a whole.

  The management device 20 may add a predetermined amount of power to the first amount of power to predict the second amount of power. The management device 20 may predict the second power amount by multiplying the first power amount by a predetermined coefficient. The management device 20 may predict the second power amount based on the first power amount and various other parameters. Various other parameters may include parameters based on so-called big data analysis. Various other parameters may include, for example, parameters related to weather conditions. Various other parameters may include parameters related to the family structure or the person image thereof expected to move into the housing complex 1 based on the location conditions of the housing complex 1. Also, various other parameters may include parameters related to floor area. Various other parameters may include parameters related to the electric power used or the usage time of the electric equipment. Various other parameters may include parameters relating to the heat insulation performance of the housing complex 1. The management device 20 may calculate a predetermined power amount to be added to the first power amount or a predetermined coefficient by which the first power amount is multiplied, based on various parameters.

  When the electricity charge charged to the resident of each dwelling unit of the housing complex 1 is changed from the pay-per-use charge to the flat-rate charge, the management device 20 determines the power consumption amount of each dwelling unit load 42 when the pay-per-use charge is applied. The measured value may be acquired as the first power amount.

  The management device 20 predicts the second amount of power in each dwelling unit of the housing complex 1 based on the actual value of the first amount of power and the actual value of the second amount of power in the dwelling unit of the same mode as the housing complex 1. Good. The management device 20 predicts the second amount of power in each dwelling unit of the housing complex 1 based on the actual value of the first amount of power and the actual value of the second amount of power in a dwelling unit that is different from the housing unit 1. You may The management device 20 calculates the first electric power amount and the second electric power amount in each dwelling unit of the housing complex 1 based on the relationship between the actual value of the first electric energy and the actual value of the second electric energy in various dwelling units. The relationship may be calculated. The management device 20 may predict the second amount of power in each dwelling unit of the housing complex 1, based on the relationship between the first amount of power and the second amount of power in each dwelling unit of the housing complex 1.

  In the housing complex 1 according to the present embodiment, the distributed power source 60 may be connected to at least some of the dwelling unit loads 42. In other words, the distributed power source 60 may be provided in at least some dwelling units. The distributed power source 60 may be installed in different situations in each dwelling unit. By charging the resident of each dwelling unit having the dwelling unit load 42 with a flat rate, the resident of each dwelling unit can use the distributed power source 60 regardless of whether or not the dwelling unit load 42 is connected to the distributed power source 60. You can enjoy the merits of reducing electricity charges fairly.

  The management entity of the housing complex 1 may change the fixed fee charged to the resident of each dwelling unit when concluding a rental contract with the resident of each dwelling unit. The management entity of the housing complex 1 may set a predetermined rule so as to reduce the flat-rate fee for a predetermined period or make it free in order to promote the move-in to the housing complex 1. The management entity of the housing complex 1 may set a predetermined rule so as to determine the flat rate to be charged to the resident of each dwelling unit based on the occupancy rate of the housing complex 1. The management entity of the housing complex 1 may set a predetermined rule so as to determine the flat rate charged to the resident of each dwelling unit based on the occupancy period of each dwelling unit. As a result, the management entity of the housing complex 1 can provide various contract systems to the residents, so that it is possible to improve customer attraction and serviceability to the residents. The flat rate may be set seasonally or monthly. The flat rate may be reduced, for example, when the output power of the distributed power source 60 increases or when the power consumed by the dwelling unit load 42 decreases. The flat rate may be changed based on an increase or decrease in the number of residents of the housing complex 1. For example, when the number of residents in the housing complex 1 decreases, the power consumed by the dwelling unit load 42 in the output power of the distributed power supply 60 may decrease. When the amount of power consumed in-house decreases, the income from selling the output power of the distributed power source 60 increases. The management entity of the housing complex 1 can reduce the burden of electricity charges on the residents by reducing the profit obtained based on the income from the sale of electricity from the fixed amount. On the other hand, the management entity of the housing complex 1 can obtain a profit based on the income from selling electricity unless the fixed rate is changed when the number of residents decreases.

  The management device 20 may comprehensively analyze the balance of the electricity charges in the plurality of apartment houses 1 to determine the flat rate in each apartment house 1. The management device 20 adds an insurance premium to the fixed amount charge, and when the difference between the second electricity charge and the fixed amount charge becomes large, the difference amount that cannot be covered by the distributed power source 60 is compensated by the insurance charge. Good.

  As shown in FIG. 6, in another embodiment, the drawing board 10 may further include a breaker 30. The breaker 30 is connected between the transaction meter 21 and the load 40. The breaker 30 has a predetermined current capacity and interrupts a current exceeding the predetermined current capacity. That is, the breaker 30 limits the current so that the current exceeding the predetermined current capacity does not flow. The predetermined current capacity of the breaker 30 may be variable. That is, the breaker 30 may change the predetermined current capacity. The breaker 30 may be replaced with a smart meter having a built-in breaker function.

  When the flat rate is charged as the electricity rate, the difference amount to be compensated becomes higher as the power consumption of the dwelling unit load 42 increases. When the flat rate is charged, it is required to reduce the power consumption of the dwelling unit load 42. The breaker 30 cuts off a current exceeding the predetermined current capacity flowing through the dwelling unit load 42, so that the power consumption of the dwelling unit load 42 can be reduced. As a result, the difference that should be compensated by the management entity of the housing complex 1 can be small. The predetermined current capacity of the breaker 30 may be set to 30 amperes or the like, for example.

  The power management system 100 may determine the flat rate based on the power management method including the procedure of the flowchart illustrated in FIG. 7.

  The plurality of dwelling unit loads 42 receive power from the power grid 50 (step S1). The plurality of dwelling unit loads 42 may be received by a low voltage collective power receiving contract.

  The management device 20 acquires the first power amount (step S2). The management device 20 may acquire the actual value of the first power amount. The management device 20 may predict the first power amount based on the designed primary energy consumption amount and acquire the predicted value. The management device 20 may predict the first power amount based on various parameters and acquire the predicted value.

  The management device 20 determines the flat rate based on the first power amount (step S3). The management device 20 may determine the flat rate based on the amount of power output from the distributed power source 60.

  The management device 20 calculates a fixed amount of electricity corresponding to the fixed amount (step S4). The management device 20 calculates the amount of power that can be supplied within the range of the flat rate as the fixed amount of power, based on the unit price of the power supplied by the power company. The management device 20 may calculate the flat-rate power amount corresponding to the flat-rate charge under the assumption that the power unit price is determined based on the power consumption amount regardless of the time zone. The management device 20 may calculate the flat-rate power amount corresponding to the flat-rate charge under the assumption that the power unit price is further determined based on the time zone.

  The management device 20 acquires the second power amount (step S5). The management device 20 may predict the amount of power consumed by the dwelling unit load 42 as the second amount of power and acquire the predicted value under the assumption that a flat rate is charged. The management device 20 obtains the amount of power consumed by the entire load 40 of the housing complex 1 from the transaction meter 21 when the flat rate is actually charged, and the obtained amount of power is divided by the number of dwelling unit loads 42. The second power amount may be calculated based on the above, and the actual value of the second power amount may be acquired.

  The management device 20 confirms the difference between the second power amount and the flat-rate power amount (step S6). The management device 20 may use the predicted value as the second power amount. The management device 20 may determine whether the excess amount of the second power amount with respect to the flat power amount can be compensated by the output power. The management device 20 may determine whether or not the output power can compensate for the total excess amount of each dwelling unit load 42.

  When it is determined in step S6 that the excess amount of power cannot be covered, the management device 20 may change the flat rate so that the excess amount of power can be covered. The management device 20 may increase the flat rate so as to reduce the difference between the second power amount and the flat power amount. The management device 20 may lower the flat rate so as to increase the difference between the second power amount and the flat-rate power amount within a range in which the excess amount of the power amount can be compensated.

  The management device 20 calculates the second electricity rate based on the second electric energy (step S7). The management device 20 may calculate the second electricity rate based on the predicted value of the second power amount. It can be said that the second electricity rate calculated based on the estimated value of the second electric energy is the estimated value of the second electricity rate. The management device 20 may calculate the second electricity rate based on the unit price of the electric power supplied by the electric power company. The management device 20 may calculate the second electricity rate under the assumption that the power unit price is constant regardless of the time zone. The management device 20 may calculate the second electricity rate under the assumption that the unit price of electricity changes for each time zone.

  The management device 20 confirms the difference between the second electricity rate and the flat rate (step S8). The management device 20 may determine whether the excess amount of the second electricity charge with respect to the fixed charge can be compensated by the power sale price generated by reversely flowing the output power to the power grid 50. The management device 20 may determine whether or not the total amount of excess in each dwelling unit load 42 can be compensated by the power sale price. After step S8, the management device 20 ends the procedure of the flowchart of FIG.

  When it is determined in step S8 that the excess electricity charge cannot be compensated, the management device 20 may change the flat rate so that the excess electricity charge can be compensated. The management device 20 may increase the flat rate so as to reduce the difference between the second electricity rate and the flat rate. The management device 20 may reduce the flat rate so as to increase the difference between the second electricity rate and the flat rate within the range in which the excess amount of the electricity rate can be compensated.

  Each step included in the flowchart illustrated in FIG. 7 may be omitted or performed in a different order.

  The drawings for explaining the embodiments according to the present disclosure are schematic. The dimensional ratios and the like 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 the 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 in the scope of the present disclosure. For example, the functions and the like included in each component can be rearranged so as not to logically contradict each other, and a plurality of components can be combined into one or divided.

  In the present disclosure, the description such as “first” and “second” is an identifier for distinguishing the configuration. The configurations distinguished by the description such as “first” and “second” in the present disclosure can exchange the numbers in the configurations. For example, the first terminal can exchange the identifier "first" and "second" with the second terminal. The exchange of identifiers is done simultaneously. Even after exchanging the identifiers, the configurations are distinguished. The identifier may be deleted. The configuration in which the identifier is deleted is distinguished by the code. Based on only the description of the identifiers such as “first” and “second” in the present disclosure, it should not be used as the basis for the interpretation of the order of the configuration and the existence of the identifier with a small number.

1 Apartment 10 Drop-in board 11, 12, 13 1st terminal, 2nd terminal, 3rd terminal 20 Management device 21 Transaction meter 211, 212 1st end, 2nd end 22 Dwelling unit meter 41 Shared load 42 Dwelling unit load 50 Power grid 60 Distributed power supply 61 Power conditioner (PCS)
62 PV (PV)
100 power management system

Claims (10)

Receives electricity from a power grid under a collective electricity reception contract for multiple residential loads,
When the resident of the dwelling unit that uses the dwelling unit load is charged a pay-per-use charge based on the amount of power consumption in the dwelling unit load, obtains the first amount of power consumed by the dwelling unit load,
Based on the first amount of power, a fixed charge for charging a resident of a dwelling unit that uses the dwelling unit load is determined,
The power management method, wherein the flat rate is determined not to be based on an actual measurement value of the amount of power supplied to the dwelling unit load.   The power management method according to claim 1, wherein the first power amount is calculated based on a design primary energy consumption amount of the dwelling unit load.   The power management method according to claim 1, wherein when the plurality of dwelling unit loads are connected to a distributed power source, the flat rate is determined further based on the amount of power output by the distributed power source. Obtaining a predicted value of the second amount of electric power consumed by the dwelling unit load when a fixed fee is charged to a resident of the dwelling unit that uses the dwelling unit load,
The power management method according to claim 3, wherein the flat rate is determined further based on the predicted value of the second power amount.   The flat-rate charge is determined so that at least a part of the difference between the predicted value of the second power amount and the flat-rate power amount corresponding to the flat-rate charge is compensated by the power amount output from the distributed power source. Item 4. The power management method according to Item 4.   At least a part of the difference between the electricity charge associated with the predicted value of the second amount of power and the flat rate is compensated by the power sale price generated by reversely flowing the power output from the distributed power source. The power management method according to claim 4, wherein the fixed charge is determined. It is equipped with a retractable board, a plurality of dwelling unit loads, and a management device,
The pull-in board connects the power grid and the plurality of dwelling unit loads without using a dwelling unit meter that measures the amount of power supplied to each dwelling unit load,
The plurality of dwelling unit loads receives power from the power grid through the service panel under a collective power receiving contract,
The management device uses the dwelling unit load, based on the first power amount consumed by the dwelling unit load when charging a resident of the dwelling unit a pay-per-use charge based on the amount of power consumption in the dwelling unit load, Determine a fixed fee to be charged to the resident of the dwelling unit using the dwelling unit load,
The power management system, wherein the flat rate is determined not to be based on an actual measurement value of the amount of power supplied to the dwelling unit load. Further comprising a distributed power source connected to the plurality of dwelling unit loads,
The power management system according to claim 7, wherein the management device determines the flat rate based on the amount of power output from the distributed power source. The draw-in board comprises a transaction meter having a first end and a second end,
A first end of the transaction meter is connected to the grid,
The second end of the transaction meter is connected to each dwelling unit load,
The transaction meter measures the amount of power received from the power grid,
The management device sells at least a part of the difference between the electricity charge charged based on the measurement result of the transaction meter and the fixed charge by reversely flowing the electric power output from the distributed power source. The power management system according to claim 8, wherein the fixed charge is determined so as to be compensated by an electricity bill.   A retractable board that connects an electric power grid and a plurality of dwelling unit loads that receive power from the electric power grid under a collective power receiving contract without using a dwelling unit meter that measures the amount of power supplied to each dwelling unit load.

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