JP2020068555A - Power management system and complex housing - Google Patents

Abstract

To provide a power management system capable of increasing merits of collective power reception and complex housing.SOLUTION: A power management system 100 includes: a transaction meter 21 connected between a power grid 50 and a plurality of dwelling house loads 42 for receiving power under a low voltage batch power reception contract from the power grid 50; a breaker 30 connected between the transaction meter 21 and each dwelling house load 42 and interrupting a current flowing to each dwelling house load 42 exceeding a predetermined current capacity; a distributed power source 60 connected between the transaction meter 21 and the breaker 30 and supplying power to each dwelling house load 42 via the breaker 30; and a control device 20 connected to the distributed power source 60 and the breaker 30 to control the predetermined current capacity.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to power management systems and apartments.

  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 system and an apartment house that can increase the merit of collective power reception.

  A power management system according to an embodiment of the present disclosure includes a transaction meter, a breaker, a distributed power supply, and a control device. The transaction meter is connected between a power grid and a plurality of dwelling unit loads that receive power from the power grid under a low voltage collective power reception contract. The breaker is connected between the transaction meter and each of the dwelling unit loads and shuts off a current that exceeds a predetermined current capacity and flows to each of the dwelling unit loads. The distributed power source is connected between the transaction meter and the breaker, and supplies power to each dwelling unit load via the breaker. The control device is connected to the distributed power source and the breaker and controls the predetermined current capacity.

  An apartment house according to an embodiment of the present disclosure includes a plurality of dwelling unit loads, a transaction meter, a breaker, a distributed power source, and a control device. The loads of the plurality of dwelling units are received from the electric power network by a low voltage collective power reception contract. The transaction meter is connected between the power grid and the plurality of dwelling unit loads. The breaker is connected between the transaction meter and each of the dwelling unit loads and shuts off a current that exceeds a predetermined current capacity and flows to each of the dwelling unit loads. The distributed power source is connected between the transaction meter and the breaker, and supplies power to each dwelling unit load via the breaker. The control device is connected to the distributed power source and the breaker and controls the predetermined current capacity.

  According to the power management system and the housing complex 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. It is a graph showing an example of change of power consumption of a dwelling unit load.

  As shown in FIG. 1, the power management system 100 according to the embodiment includes a transaction meter 21 and a breaker 30. The power management system 100 may further include the control device 20. The power management system 100 may further include a retractable board 10. The pull-in board 10 may include a transaction meter 21, a breaker 30, and a controller 20. The control device 20 may be arranged outside the drawing board 10. The power management system 100 may further include a distributed power source 60. The distributed power source 60 may be connected between the transaction meter 21 and the breaker 30.

  The housing complex 1 according to an embodiment includes a power management system 100, 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 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 number of dwelling unit loads 42 is not limited to two as shown in FIG. 1, and may be three or more.

  Transaction meter 21 is connectable to power grid 50 at one end. The pull-in board 10 may include a first terminal 11. The transaction meter 21 may be connected to the power grid 50 via the first terminal 11 of the service panel 10. Transaction meter 21 connects to breaker 30 at the other end. The breaker 30 connects to the transaction meter 21 at one end. The breaker 30 can be connected to the dwelling unit load 42 at the other end. The transaction meter 21 is connected to the dwelling unit load 42 via the breaker 30. The breaker 30 is connected between the transaction meter 21 and the dwelling unit load 42. The drawing board 10 may include a second terminal 12. The breaker 30 may be connected to the dwelling unit load 42 via the second terminal 12 of the drawing board 10.

  The transaction meter 21 connects to the shared load 41 at the end that connects to the breaker 30. The transaction meter 21 may be connected to the shared load 41 via the breaker 30 or may be connected to the shared load 41 not via the breaker 30. The transaction meter 21 may be connected to the shared load 41 via the second terminal 12 of the drawing board 10. The transaction meter 21 measures the sum of the amounts of power supplied from the power grid 50 to the dwelling unit load 42 and the shared load 41. That is, the transaction meter 21 measures the amount of power supplied from the power grid 50 to 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.

  The control device 20 may be a device including a processor or the like, or may be a device such as a server or the like. The control device 20 may be an EMS (Energy Management System). The control 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 control device 20 is connected to the breaker 30 by a communication line represented by a broken line, and outputs control information to the breaker 30. The control information for the breaker 30 may include information that specifies the value of the predetermined current capacity. The breaker 30 acquires the control information from the control device 20 and changes the predetermined current capacity to the value specified by the control information. That is, the control device 20 causes the breaker 30 to change the predetermined current capacity. In the present embodiment, it is assumed that the control device 20 causes the breaker 30 to change a predetermined current capacity. In other words, it is assumed that the control device 20 sets a predetermined current capacity.

  The control device 20 is connected to the dwelling unit load 42 by a communication line represented by a broken line, and outputs control information to the dwelling unit load 42. The control information for the dwelling unit load 42 may include information for controlling the amount of power consumed in the dwelling unit load 42. The dwelling unit load 42 may obtain the control information from the control device 20 and operate at the power consumption amount specified by the control information.

  The distributed power source 60 includes a solar power generation device (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 distributed power source 60 may or may not be included in the housing complex 1.

  The retractable board 10 may include a third terminal 13. The transaction meter 21 may be connected to the distributed power source 60 via the third terminal 13 of the drawing board 10.

  The controller 20 may be connected to the PCS 61 by a communication line represented by a broken line. The control 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 distributed power source 60 is connected between the transaction meter 21 and the breaker 30 so as to be connected to the load 40 via the breaker 30 and the power grid 50 via the transaction meter 21. The distributed power source 60 can supply power to the load 40 by connecting to the load 40 via the breaker 30. The distributed power source 60 can reverse flow the surplus power to the power grid 50 by connecting to the power grid 50 via the transaction meter 21. 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 power supplied to the load 40 from the power grid 50 is also referred to as received power. 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.

  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, even if one of the high voltage collective power receiving contract and the low voltage collective power receiving contract is concluded, the management entity of the housing complex 1 enjoys the merit of reducing the unit price of the electricity rate by cutting the peak power consumption. You can.

  In the comparative example, 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. In the comparative example, the housing complex 1 includes an electricity meter that measures the amount of power consumption of each dwelling unit load 42. The electric power company charges an electric charge to the resident who has signed the power receiving contract for each house, based on the measurement result of the power consumption amount in each house load 42. 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. The management entity of the housing complex 1 may charge the resident of each dwelling unit with an electric charge based on the power consumption of the dwelling unit load 42 of each dwelling unit. In this case, each dwelling unit needs to be equipped with an electricity meter that measures the amount of power consumption of each dwelling unit load 42. The electricity charge charged based on the power consumption of the dwelling unit load 42 is also referred to as a metered charge.

  The management body of the housing complex 1 may charge 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. In other words, the management entity of the housing complex 1 may charge a resident of each dwelling unit that uses each dwelling unit load 42 with a fixed electricity charge that is not based on the amount of power supplied to 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. 2 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. 2 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. 2, the hatched portion in the lower right diagonal line represents the 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. 2, 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. That is, by using the flat-rate charge, all-you-can-use electric power is realized. 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.

  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 power management system 100 according to the present embodiment includes the breaker 30 that limits the current flowing through the dwelling unit load 42 to a predetermined current capacity or less. The breaker 30 cuts off the current that exceeds the predetermined current capacity flowing through the dwelling unit load 42, so that the power consumption of the dwelling unit load 42 is less likely to increase.

  The power sale charge generated by the reverse power flow from the distributed power source 60 to the power grid 50 may be lower than the electricity charge charged for the power received from the power grid 50. When the power sale charge is lower than the electricity charge, the electricity charge corresponding to the received power that is reduced by consuming the output power at home by the dwelling unit load 42 may be larger than the power sale price generated by the reverse flow. That is, the self-consumption of electric power may be more beneficial to the management entity of the housing complex 1 or the resident of the housing complex 1 than the reverse flow of the electric power. Promotion of private consumption of output power is required.

  When the current flowing from the distributed power source 60 to the dwelling unit load 42 exceeds the current capacity of the breaker 30, the output power is less likely to be consumed at home. In the power management system 100 according to this embodiment, the control device 20 can set a predetermined current capacity. The control device 20 may set the predetermined current capacity to a large value based on the output power in order to allow as much current as the distributed power source 60 to output to the dwelling unit load 42. When the output power is smaller than the power consumption of the dwelling unit load 42, the control device 20 may set the predetermined current capacity to a small value in order to reduce the power received from the power grid 50 as much as possible. The control device 20 sets a predetermined current capacity based on the output power, whereby personal consumption can be promoted and the power received from the power grid 50 can be reduced.

  The control device 20 may set a predetermined current capacity within a predetermined range. That is, the predetermined current capacity may have a lower limit value and an upper limit value. The lower limit value of the predetermined current capacity may be a value such as 20 amperes or 40 amperes that may be set in each power receiving contract. The upper limit value of the predetermined current capacity may be determined based on the specifications of the electric equipment of the housing complex 1, the capacity of the wiring, or the like. The upper limit of the predetermined current capacity may be a value such as 60 amperes. The controller 20 may change the predetermined current capacity in predetermined units. The predetermined unit may be a value such as several amperes. The controller 20 may change the predetermined current capacity from 40 amps to 45 amps or 50 amps, for example.

  The controller 20 may set a predetermined current capacity based on the output power acquired from the PCS 61. For example, the control device 20 may increase the predetermined current capacity when the output power is equal to or higher than the predetermined value, or may decrease the predetermined current capacity when the output power is lower than the predetermined value. In this case, the predetermined value may be set to, for example, the average value of the power consumption of the load 40, or may be set to the maximum value of the power consumption of the load 40. Since the control device 20 sets the predetermined current capacity based on the output power, the self-consumption is easily promoted and the received power is easily reduced. When the predetermined value is the average value of the power consumption of the load 40, the breaker 30 may increase the frequency of interrupting the current exceeding the predetermined current capacity. Increasing the frequency of interruption of current may make it difficult to promote self-consumption. In order to reduce the frequency of interruption of the current, the predetermined value may be set to a value obtained by adding a correction value to the average value of the power consumption of the load 40. That is, the predetermined value may be set based on the power consumption of the load 40.

  The control device 20 may set a predetermined current capacity based on the reverse flow power acquired from the transaction meter 21. For example, the control device 20 may increase the predetermined current capacity when the reverse flow current is a predetermined value or more, and may decrease the predetermined current capacity when the reverse flow current is less than the predetermined value. In this case, the predetermined value may be zero, for example.

  The control device 20 may set a predetermined current capacity based on the received power obtained from the transaction meter 21. For example, the control device 20 may decrease the predetermined current capacity when the received power is equal to or higher than the predetermined value, or may increase the predetermined current capacity when the received power is lower than the predetermined value. In this case, the predetermined value may be, for example, the average value of the power consumption of the load 40 or the minimum value of the power consumption of the load 40. That is, the predetermined value may be set based on the power consumption of the load 40.

  Since the control device 20 sets the predetermined current capacity based on at least one of the received power and the reverse flow power, private consumption is facilitated and the received power is easily reduced.

  The control device 20 may predict the electric power generated by the PV 62 and set a predetermined current capacity based on the prediction result. The power generated by the PV 62 is also referred to as generated power. The larger the generated power, the larger the output power can be. The control device 20 may predict the generated power based on the information about the weather in the area where the PV 62 is installed. The control device 20 may predict that the generated power will increase, for example, when the weather is predicted to be sunny. The control device 20 may predict the sunshine duration and predict the generated power based on the prediction result. The weather information may include predictions regarding daylight hours. The control device 20 sets the predetermined current capacity based on the prediction result of the generated power, so that the predetermined current capacity can easily follow the change in the generated power of the PV 62. As a result, private consumption is likely to be promoted. When setting a predetermined current capacity based on the predicted result of the generated power, the control device 20 compares the output power of the PCS 61 and the predicted result of the generated power of the PV 62, and based on the comparison result, the predicted result of the generated power. You may correct.

  The breaker 30 may be located on the drawing board 10. That is, the breaker 30 does not have to be provided in the dwelling unit. In this case, the resident of each dwelling unit of the housing complex 1 cannot operate the breaker 30 located on the drawing board 10. The breaker 30 may automatically return to the conductive state after a lapse of a predetermined time when the current exceeding a predetermined current capacity is cut off. Among devices with large power consumption, for example, devices such as an air conditioner, a microwave oven, or an IH heater stop operating at the timing when the breaker 30 cuts off the current, and remain stopped even after the breaker 30 automatically returns. Has become. When the breaker 30 interrupts the current due to the operation of these devices, the current flowing after the breaker 30 automatically returns may be within a predetermined current capacity range. By doing so, the resident can save the trouble of operating the breaker 30.

  The breaker 30 may not be included in the drawing board 10 and may be located inside the dwelling unit. In this case, the resident of each dwelling unit of the housing complex 1 can operate the breaker 30. If the breaker 30 interrupts a current exceeding a predetermined current capacity, the occupant may manually return the breaker 30 to the conductive state. When the resident can manually return the breaker 30 to the conductive state, the resident can return the breaker 30 to the conductive state earlier than when the breaker 30 automatically returns.

  The dwelling unit load 42 may include a device that can control the power consumption regardless of the operation of the occupant. The dwelling unit load 42 may include, for example, a natural refrigerant heat pump water heater (so-called EcoCute (registered trademark)). The natural refrigerant heat pump water heater can consume excess power and store heat. Control device 20 may increase the predetermined current capacity and output control information for controlling the natural refrigerant heat pump water heater to operate with large power consumption. As a result, of the surplus power, the power consumed by itself can be further increased.

  The dwelling unit load 42 may include, for example, a power storage device. The power storage device can charge surplus power. The control device 20 may increase the predetermined current capacity and output control information for controlling the power storage device to be charged according to the predetermined current capacity. As a result, of the surplus power, the power consumed by itself can be further increased.

  The dwelling unit load 42 may include, for example, an automatic cleaner, a clothes dryer, a tableware dryer, or the like. These devices need only complete operation while the resident is absent. The control device 20 may distribute the operation of these devices so that the power consumption of these devices falls within the range of the surplus power.

  By controlling the power consumption of the dwelling unit load 42 by the control device 20, private consumption can be promoted and received power can be reduced.

  After setting the predetermined current capacity of the breaker 30, the control device 20 notifies the occupant of the dwelling unit, who uses the dwelling unit load 42 connected to the breaker 30, of information regarding the setting of the current capacity. Good. The information regarding the setting of the current capacity may include, for example, the value of the set current capacity, or may include information that prompts the use or stop of the device that consumes power. The control device 20 may notify the information regarding the setting of the current capacity to, for example, the terminal possessed by the resident or the terminal installed in each dwelling unit.

  The control device 20 may acquire data from the transaction meter 21 and the PCS 61 based on various communication methods. The control device 20 may output control information to the breaker 30 or the dwelling unit load 42 based on various communication methods. The control device 20 may communicate based on a short-range communication method such as ZigBee (registered trademark). The control device 20 may communicate by various transmission media such as infrared communication or power line communication (PLC). The control device 20 may operate a communication protocol such as ZigBee SEP (Smart Energy Profile) 2.0 or ECHONET Lite (registered trademark).

  The control device 20 may output setting data based on a code defined by a predetermined communication standard as control information for causing the breaker 30 to change a predetermined current capacity. The predetermined communication standard may include a standard such as ECHONET Lite (registered trademark) or SEP2.0. Hereinafter, it is assumed that the control device 20 communicates based on the ECHONET Lite (registered trademark) standard. The control device 20 may regard the breaker 30 as a device object. The control device 20 may output the data instructing to change the current capacity and the value of the changed current capacity to the breaker 30 as the device object as one data frame. For example, the control device 20 may output to the breaker 30 a data frame including data “60 amperes” representing the value of the current capacity. The control device 20 may regard the device included in the dwelling unit load 42 as a device object, and output data based on a code defined by the ECHONET Lite (registered trademark) standard as control information for the device.

  When the shared load 41 is connected to the transaction meter 21 via the breaker 30, the control device 20 may cut off the current flowing through the shared load 41 that exceeds a predetermined capacity. The controller 20 may control the power consumed by the shared load 41 based on the output power of the PCS 61. The shared load 41 may include, for example, an energy storage device such as a power storage device or a heat storage device. The power storage device may be configured to be connectable to an electric vehicle equipped with a secondary battery.

  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 Control device 21 Transaction meter 41 Shared load 42 Dwelling unit load 50 Power grid 60 Distributed power supply 61 Power conditioner (PCS)
62 Photovoltaic power generator (PV)
100 power management system

Claims (9)

A transaction meter connected between the power grid and a plurality of dwelling unit loads that receive power from the power grid in a low-voltage package contract.
A breaker that is connected between the transaction meter and each of the dwelling unit loads and that cuts off a current flowing in each of the dwelling unit loads exceeding a predetermined current capacity,
A distributed power supply connected between the transaction meter and the breaker, and supplying electric power to each of the dwelling unit loads via the breaker,
A power management system comprising: a control device that is connected to the distributed power source and the breaker and controls the predetermined current capacity.   The power management system according to claim 1, wherein the breaker changes the predetermined current capacity based on the power output by the distributed power source. The control device outputs control information that causes the breaker to change the predetermined current capacity based on electric power output from the distributed power source,
The power management system according to claim 2, wherein the breaker changes the predetermined current capacity based on the control information acquired from the control device. The control device outputs, as the control information, setting data based on a code defined by a predetermined communication standard,
The power management system according to claim 3, wherein the breaker changes the predetermined current capacity based on the setting data.   5. The control device sets the predetermined current capacity based on at least one of electric power received from the electric power grid and electric power that the distributed power supply flows backward to the electric power grid. The power management system according to 1 above. The distributed power source includes a solar power generation device,
The power management system according to claim 5, wherein the control device predicts electric power generated by the solar power generation device, and sets the predetermined current capacity based on a prediction result.   The power management system according to any one of claims 1 to 6, wherein the control device is connected to the dwelling unit load and controls the power consumption of the dwelling unit load based on the setting of the predetermined current capacity.   The power management system according to any one of claims 1 to 7, wherein the control device notifies a resident of a dwelling unit that uses each of the dwelling unit loads, to set the predetermined current capacity. Multiple residential unit loads that receive electricity from the power grid under a low-voltage package
A transaction meter connected between the power grid and the plurality of dwelling unit loads;
A breaker that is connected between the transaction meter and each of the dwelling unit loads and that cuts off a current flowing in each of the dwelling unit loads exceeding a predetermined current capacity,
A distributed power supply connected between the transaction meter and the breaker, and supplying electric power to each of the dwelling unit loads via the breaker,
A housing complex including a control device that is connected to the distributed power source and the breaker and controls the predetermined current capacity.

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