JP2014209765A - Remote meter-reading system, communication device, and power distribution board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save wiring by using a private communication network for part of a communication path transmitting meter-reading information, and to make it easy to secure communication quality.SOLUTION: A remote meter-reading system comprises a house terminal 11, a communication device 12, an aggregation device 13, a meter-reading terminal 15, and a power distribution board 21. The meter-reading terminal 15 obtains meter-reading information from a power meter 20. The house terminal 11 is arranged in each house 101 and communicates with the meter-reading terminal 15. The communication device 12 is housed in the power distribution board 21 arranged in each house 101, and relays a communication signal between the meter-reading terminal 15 and the house terminal 11. The aggregation device 13 communicates with the house terminal 11 by use of a private communication network 1 laid in a housing complex 10, aggregates the meter-reading information which the house terminal 11 obtained from the meter-reading terminal 15, and further transmits the aggregated meter-reading information to a management device 30 provided at the outside of the housing complex 10.

Description

  The present invention relates to a remote meter-reading system that manages the amount of supply medium used by each consumer in a building in a place different from the building in a building where there are a plurality of consumers who purchase the supply medium from a supplier. The present invention relates to a communication device used in a meter-reading system and a distribution board in which the communication device is housed.

  In general, a supply medium such as electricity, gas, water, and heat is supplied to a customer from a supplier through a supply facility such as a transmission line, a gas conduit, a water pipe, and a heat conduit. A consumer of the supply medium measures the amount of the supply medium used with a meter. In addition, the supplier confirms the result of measurement by the measuring instrument with a meter reader, and charges the customer for the amount of supply medium used.

  The meter reading work by the meter reader requires labor costs, and there are problems such as erroneous reading of the measured value. Therefore, in order to solve this kind of problem, the measured value is managed without relying on the meter reader. Various techniques have been proposed.

  For example, in the technique described in Patent Document 1, a slave station is connected to a meter (power meter) arranged in each dwelling unit (customer) in an apartment house. The slave station communicates with the master station as an aggregation device arranged in an electrical room or the like by power line carrier communication. In Patent Document 1, a distribution line laid in an apartment house is used for a communication path between a master station and a slave station, and meter reading information measured by a power meter is transmitted from the slave station to the master station through the distribution line. Are consolidated into the master station. Further, the master station can communicate with a management device (upper aggregation server) operated by an electric power company through a public network such as the Internet, and collects meter reading information acquired from the slave stations and notifies the management device. It is possible.

  Therefore, by using a distribution line as a communication path between the master station and the slave station arranged in the apartment house, it is not necessary to separately lay a communication line between the master station and the slave station, thereby reducing wiring. . In other words, since the wiring work for laying the communication line is not required when performing remote meter reading, it is easy to introduce remote meter reading even in an existing apartment house.

JP 2006-180021 A

  By the way, when a plurality of step-down transformers are arranged in a building in an apartment house, a communication signal path is secured by connecting a coupler between the distribution lines on the secondary side of different step-down transformers. In this configuration, the communication signal attenuates when the communication signal passes through the coupler, and the communication signal also attenuates when the path of the communication signal branches. That is, the loss of communication signals increases. Furthermore, when the distance between the master station located in the electrical room and the slave station connected to the meter is long, the communication path becomes long and the number of couplers through which the communication signal passes increases, resulting in communication. As a result, the loss of signals increases, and as a result, there may be a problem that necessary communication quality cannot be ensured.

  The present invention provides a remote meter-reading system that enables wire-saving of a communication path for transmitting meter-reading information for each consumer in a building where a plurality of consumers exist, and facilitates ensuring communication quality of the communication path. For the purpose. Furthermore, this invention aims at providing the communication apparatus used for this remote meter-reading system, and also this invention aims at providing the distribution board in which this communication apparatus was accommodated.

  In order to achieve the above object, the remote meter reading system of the present invention is the amount of supply medium used in each space in a building provided with a plurality of spaces occupied by consumers who use the supply medium supplied from the supplier. A meter-reading terminal for acquiring meter-reading information from a meter for weighing each of them, an information terminal arranged in each space for communicating with the meter-reading terminal, a distribution board placed in each space, and the power distribution A communication device housed in a panel and relaying a communication signal between the meter reading terminal and the information terminal; and a communication network laid in the building to communicate with the information terminal, and the information terminal An aggregation device that aggregates the meter reading information acquired from the meter reading terminal, and transmits the meter reading information aggregated by the aggregation device to a management device provided outside the building.

  The communication apparatus according to the present invention provides meter reading information from meters that respectively measure the amount of supply medium used in each space in a building provided with a plurality of spaces occupied by consumers using the supply medium supplied from a supplier. A communication signal between the meter reading terminal that acquires the information and the information terminal that is arranged in each space and transmits the meter reading information acquired from the meter reading terminal to the aggregation device using a local communication network installed in the building. It is relayed and is housed in a distribution board arranged in the space.

  The distribution board according to the present invention is arranged in a space occupied by a customer who uses a supply medium supplied from a supplier and houses the communication device.

  According to the configuration of the present invention, in a building where there are a plurality of consumers, it is possible to reduce wiring by using an existing local communication network as a part of a communication path for transmitting meter reading information for each consumer. it can. In addition, since the information terminal arranged for each space occupied by each consumer is used for relaying between the meter provided in each space and the aggregation device connected to the local communication network, the communication path between the meter and the information terminal Becomes shorter and it becomes easier to ensure communication quality.

It is a schematic block diagram which shows the whole structure of embodiment. It is a block diagram which shows the principal part same as the above.

  The embodiment described below is directed to a building such as an apartment house provided with a plurality of spaces occupied by consumers using a supply medium supplied from a supplier. Moreover, the remote meter-reading system demonstrated below acquires and manages the usage-amount of the supply medium in each consumer (space) in a building in a place different from a building.

  The supply company means an electric power company, a gas company, a water service company, or the like. These suppliers supply supply media (electricity, fuel gas, water, etc.) to consumers using supply facilities (distribution network, piping network, etc.). In the embodiment described below, a building in which a plurality of consumers exist is not limited to a housing complex, but a space (an office where a plurality of consumers are independent, such as a tenant building used as an office or a store) , A store occupying a store).

  However, about the following embodiment, the case where a building is an apartment house and the space which a consumer occupies is a dwelling unit is demonstrated as an example. The case where the supply medium is electricity will be mainly described.

  As shown in FIG. 1, a plurality of dwelling units 101 exist in the apartment house 10 that is a building, and a distribution board 21 and a dwelling unit terminal 11 that is an information terminal are arranged in each dwelling unit 101. The distribution board 21 has a branch breaker (not shown) for branching the electric power received from the distribution line 22 laid in the apartment 10 to a branch line (not shown) laid in the dwelling unit 101, and a distribution board. A main breaker (not shown) disposed between the electric wire 22 and the branch breaker is incorporated. Moreover, the distribution board 21 incorporates the communication apparatus 12 mentioned later. The communication device 12 is connected between the primary side of the main breaker built in the distribution board 21 and the secondary side of the branch breaker that supplies power to the dwelling unit terminal 11. Note that the communication device 12 is not necessarily stored in the distribution board 21 and may be disposed outside the distribution board 21.

  On the other hand, the dwelling unit terminal 11 communicates with an aggregation device 13 composed of a computer server disposed in the manager room 102 and the like through the local communication network 1 laid in the apartment house 10. The dwelling unit terminal 11, the local communication network 1, and the aggregation device 13 are provided as basic facilities of the apartment house 10. The protocol used in the local communication network 1 is not particularly limited, but an Ethernet (registered trademark) generally used in wired communication, an information network communication network such as an optical communication network, a dedicated wiring network used for the dwelling unit terminal 11 and the like are appropriately used. Used for. Further, a dedicated protocol may be used for the local area communication network 1.

  Specifically, each dwelling unit terminal 11 is provided with a function for a call with a door phone cordless handset or a lobby intercom in each dwelling unit 101 in which the dwelling unit terminal 11 is installed. Further, each dwelling unit terminal 11 has a function of notifying the aggregation device 13 that an abnormality has been detected by a sensor (fire detector, gas sensor, etc.) installed in each dwelling unit 101. A function of notifying the dwelling unit terminal 11 of an alarm is provided.

  By the way, in many cases, the housing complex 10 receives power from the distribution network 24 at a high voltage such as 6600 V, and after the voltage is stepped down to 100 V / 200 V by the step-down transformer 23 disposed in the electric room 103 of the housing complex 10, Supply power. In the electrical room 103, in addition to the step-down transformer 23, a power meter 25 for power purchase for measuring the amount of power received from the power distribution network 24 laid outside and a power meter 26 for power sale described later are disposed. Is done. The power meters 25 and 26 are connected to the primary side of the step-down transformer 23.

  The distribution line 22 of the apartment house 10 is connected to the secondary side of the step-down transformer 23, and a dedicated distribution line 221 that supplies power to each dwelling unit 101 branches from the distribution line 22. The dedicated distribution line 221 is provided with a power meter 20 as a meter for measuring the amount of power used in each dwelling unit 101. The power meter 20 is housed in a meter box 27. As shown in FIG. 2, the meter box 27 also stores a meter reading terminal 15 that acquires and stores a measured value measured by the power meter 20 as meter reading information. The meter-reading terminal 15 acquires meter-reading information from the power meter 20 every predetermined time (for example, every 5 minutes, every 30 minutes, etc.), and stores the meter-reading information for a certain period (for example, 40 days).

  The meter-reading terminal 15 includes a power line communication interface 151 that performs power line carrier communication using the dedicated distribution line 221 and the distribution line 22 of the apartment house 10 as communication paths. The meter-reading terminal 15 of the present embodiment also includes a wireless communication interface 152 for performing wireless communication. The wireless communication used in the wireless communication interface 152 uses radio waves as a transmission medium. Various standards for this type of wireless communication are known, and are appropriately selected from various wireless communication technologies such as WiFi (registered trademark), ZigBee (registered trademark), Bluetooth (registered trademark), and specific low power wireless. In addition, you may employ | adopt other radio | wireless communication techniques, such as the structure which uses other electromagnetic waves like light as a radio signal, the structure which uses an electric field or a magnetic field for a transmission medium, the structure which uses an ultrasonic wave.

  On the other hand, the distribution board 21 of each dwelling unit 101 is connected to each dedicated distribution line 221, and the meter box 27 and the distribution board 21 are connected one-on-one via the dedicated distribution line 221. In the distribution board 21, the communication device 12 is arranged as described above. The communication device 12 includes a power line communication interface 121 that forms a communication path with the power line communication interface 151 of the meter-reading terminal 15 through the dedicated distribution line 221. That is, the communication device 12 performs power line carrier communication using the dedicated distribution line 221 as a communication path with the meter-reading terminal 15 and acquires meter-reading information acquired by the meter-reading terminal 15.

  Here, since the distance between the distribution board 21 provided in each dwelling unit 101 and the power meter 20 is relatively short, good communication quality can be obtained between the communication device 12 and the meter-reading terminal 15 while using power line carrier communication. Can be secured. In the above configuration, the distance between the communication device 12 and the meter-reading terminal 15 is short, and it is easy to ensure communication quality. In addition, there is one dedicated distribution line 221 between the communication device 12 and the meter-reading terminal 15, which is almost the same as the state connected with the dedicated line, and between the communication device 12 and the meter-reading terminal 15. The possibility of communication failure is reduced.

  The communication device 12 also communicates with the dwelling unit terminal 11. In this embodiment, the branch line (not shown) laid in the dwelling unit 101 is used as the communication path 2 between the communication device 12 and the dwelling unit terminal 11, and the power line is conveyed between the dwelling unit terminal 11 and the communication unit 12. A configuration for performing communication is adopted. Therefore, the communication device 12 also uses the power line communication interface 121 for communication with the dwelling unit terminal 11. However, other technologies can be used for the communication path 2 between the communication device 12 and the dwelling unit terminal 11. For example, it is possible to form the communication path 2 using a radio signal as a transmission medium.

  When performing power line carrier communication between the communication device 12 and the dwelling unit terminal 11, the communication device 12 performs power line carrier communication for both the dwelling unit terminal 11 and the meter-reading terminal 15. In this case, the communication device 12 may function as a packet repeater that transmits a communication signal having the same content to the dwelling unit terminal 11 after receiving the communication signal from the meter-reading terminal 15.

  That is, the power line communication interface 121 is provided with a signal processing unit 122 that transmits the same communication signal after receiving the communication signal of the power line carrier communication. Here, since the communication from the communication device 12 to the dwelling unit terminal 11 is short-distance communication in the dwelling unit 101, the signal power of the communication signal can be reduced.

  As described above, by providing the distribution device 21 with the communication device 12 that functions as a packet relay, the distance of the communication path between the meter reading terminal 15 that acquires meter reading information from the power meter 20 and the communication device 12 is short. Thus, the signal power of the communication signal can be reduced in this communication path. And since the distance of the communication path 2 between the communication apparatus 12 and the dwelling unit terminal 11 also becomes short, the signal power of the communication signal which transmits this communication path 2 can be made small. In other words, it is easier to ensure communication quality than when performing power line carrier communication between the meter-reading terminal 15 and the dwelling unit terminal 11 without the communication device 12 interposed.

  The dwelling unit terminal 11 is provided with a display (not shown) such as a liquid crystal display, and can display meter reading information on the display by receiving meter reading information. Since meter-reading information is the amount of electric power consumption for every fixed time, it is desirable to show the integrated value of the amount of electric power consumption (the integrated value from the start of use or the integrated value for one month) on the display together with the meter-reading information. In addition, when the integrated value for one month is presented on the display device, it is desirable to present the electricity bill together.

  If the aggregation device 13 has acquired the unit price information of the electricity bill, each dwelling unit terminal 11 can obtain the terminal of the electricity fee from the aggregation device 13 via the local area communication network 1. Further, the aggregation device 13 acquires unit price information from the management device 30 described later. Each dwelling unit terminal 11 stores the unit price information of the electricity bill acquired from the aggregation device 13 and calculates the electricity bill from the integrated value of the power consumption and the unit price information of the electricity bill. For example, the integrated value for one month is calculated based on the power consumption for each one-hour time period acquired from the meter-reading terminal 15 and the unit price information of the electricity bill stored in the dwelling unit terminal 11.

  The dwelling unit terminal 11 has a function of transferring meter reading information acquired from the meter reading terminal 15 via the communication device 12 to the aggregation device 13. As described above, the dwelling unit terminal 11 can communicate with the aggregation device 13 via the local area communication network 1. Moreover, since the local area communication network 1 is a wired communication network as a core facility of the apartment house 10 using a dedicated line, if the dwelling unit terminal 11 tries to transfer the meter reading information to the aggregation device 13, the communication path 2 Protocol conversion to the local communication network 1 is required.

  That is, the dwelling unit terminal 11 is provided with a power line communication interface 111 that forms a communication path 2 for transmitting a communication signal of power line carrier communication with the power line communication interface 121 of the communication device 12. In addition, the dwelling unit terminal 11 includes a communication interface 112 that communicates with the aggregation device 13 via the local communication network 1. A protocol conversion unit 113 is provided between the power line communication interface 111 and the communication interface 112 to convert a communication protocol between the communication path 2 and the local communication network 1.

  As described above, since the protocol conversion unit 113 is provided in the dwelling unit terminal 11, the meter reading information from the meter reading terminal 15 in the collective housing 10 is aggregated by using the local area communication network 1 which is a basic facility in the collective housing 10. It will be transferred to the device 13. In the aggregation device 13, the meter reading information measured by the power meter 20 provided in each dwelling unit 101 of the apartment house 10 is aggregated.

  The aggregation device 13 has a function of transferring meter reading information to an external management device 30 through the public network 3 such as the Internet. The management device 30 may be operated by an electric power company or operated by an energy management company other than the electric power company. In the illustrated example, a case where the energy management company operates the management device 30 is shown, and communication via the public network 3 is performed between the management device 31 operated by the power company and the management device 30 operated by the energy management company. It is possible.

  The energy management company is a business operator that mediates between each customer of the collective housing 10 and the power company. The energy management company pays the electric power company a price corresponding to the amount of electric power consumed in the entire housing complex 10, and each consumer in the housing complex 10 consumes the electric power consumed in each individual unit 101. Collection of consideration for.

  Therefore, the power consumption measured by the power meter 20 provided in each dwelling unit 101 is managed by the management device 30 operated by the energy management company. On the other hand, the power consumption measured by the power meter 25 for power purchase disposed in the electrical room 103 in the apartment house 10 is managed by the management device 31 operated by the power company.

  The measurement result of the power meter 25 is transmitted to the management device 31 via the communication network 4 installed together with the power distribution network 24. For example, an optical fiber cable is used for the communication path of the communication line 4. Therefore, in the illustrated example, an ONU (Optical Network Unit) 32 is connected to the communication line 4. Further, in order to form a communication path between the power meter 25 and the ONU 32, a communication master device 33 is attached to the ONU 32, and a communication slave device 34 is attached to the power meter 25. The communication path between the communication master unit 33 and the communication slave unit 34 is a wired communication path using a power line carrier communication technology or the like according to the communication quality in the installation environment, and a wireless communication path of various standards using radio waves as a medium. Are used as appropriate. The power meter 25 is a so-called smart meter, and transmits a measurement result to the management device 31 by communicating with an ONU (Optical Network Unit) connected to the communication line 4.

  In the electric power meter 25, high voltage electric power such as 6600 V received by the apartment house 10 is measured, and the electricity charge for the amount of electric power measured by the electric power meter 25 is charged from the electric power company to the energy management company. That is, the electric power company makes a contract for high-voltage power such as 6600 V with the energy management company, and does not make a contract with each consumer of the apartment house 10. On the other hand, the energy management company makes a contract equivalent to a contract of 100V / 200V low-voltage power with each customer of the apartment house 10. As the contracts are hierarchized in this way, the electric power company only needs to make a contract with the energy management company, so the contract work becomes simple and the electricity fee only has to be collected from the energy management company. It is also easy to manage the collection of electricity charges.

  In addition, the energy management company purchases relatively cheap power from a power company through a collective contract for high-voltage power, distributes this power to each consumer in the apartment complex 10, and collects electricity charges from each consumer. can get. Also, since it corresponds to the work of collecting electricity charges from each consumer, profits can be gained by charging service charges to the power company or discounting the purchase price of high-voltage power It becomes possible.

  The meter-reading terminal 15 provided in the meter box 27 may acquire meter-reading information from other meters such as the gas meter 28 and the water meter 29 in addition to the power meter 20. In this case, the other meter is provided with a wireless communication interface (not shown) that forms a wireless communication path with the wireless communication interface 152 provided in the meter-reading terminal 15. In this configuration, the meter reading terminal 15 acquires not only the power meter 20 but also meter reading information from other meters, so that not only the meter reading information of the power meter 20 but also the meter readings of other meters such as the gas meter 28 and the water meter 29 are performed. Information can also be transmitted to the aggregation device 13 through the meter-reading terminal 15.

  The meter reading information of other meters such as the gas meter 28 and the water meter 29 is transmitted to the communication device 12 or the dwelling unit terminal 11 using a dedicated meter reading terminal (not shown) instead of the meter reading terminal 15 installed in the power meter 20. May be. In addition, since other meters such as the gas meter 28 and the water meter 29 are provided with a wireless communication interface, the dwelling unit terminal 11 is provided with a wireless communication interface (not shown), so that the dwelling unit terminal 11 can read meter reading information of other meters. May be obtained directly.

  If the energy management company has a contract with a gas company or a water company, it will be possible for the energy management company to purchase fuel gas and water in a lump like the power company. That is, the energy management company pays the gas charge for the entire apartment house 10 to the gas company, and the energy management company pays the water charge for the entire apartment house 10 to the water utility. In addition, the energy management company distributes the fuel gas and water purchased in a lump to each consumer of the apartment house 10 and collects gas charges and water charges from each consumer.

  Also, unit price information of gas charges and water charges is acquired and stored from the aggregation device 13 by the dwelling unit terminal 11 via the local area communication network 1 and stored in the stored unit price information and meter reading information in the same manner as the electricity charges. It is desirable to display the gas rate and water rate calculated based on the display unit of the dwelling unit terminal 11. By presenting electricity charges, gas charges, and water charges to the consumers using the dwelling unit terminal 11, the consumers become interested in the usage of electricity, fuel gas, and water, and become aware of savings. .

  The configuration example described above employs a configuration in which the communication device 12 is interposed between the meter-reading terminal 15 and the dwelling unit terminal 11 that is an information terminal, and the meter-reading information is relayed by the communication device 12. However, since the meter-reading terminal 15 is connected to the dedicated distribution line 221, and the dedicated distribution line 221 is branched from the distribution line 22, the communication signal output from the meter-reading terminal 15 is transmitted using the distribution line 22 as a communication path. Is done. Therefore, the meter-reading terminal 15 needs to designate a transmission destination in the case of communication.

  When the transmission destination is the dwelling unit terminal 11 belonging to the same dwelling unit 101, the communication signal only needs to reach the communication device 12, so the meter-reading terminal 15 relatively reduces the output signal power. When the transmission destination is not the dwelling unit terminal 11 belonging to the same dwelling unit 101, the meter-reading terminal 15 relatively increases the output signal power. In short, the meter-reading terminal 15 makes the signal power of the communication signal whose destination is the dwelling unit terminal 11 belonging to the same dwelling unit 101 smaller than the signal power of the communication signal of the destination that is not the dwelling unit terminal 11 belonging to the same dwelling unit 101. is there.

  Here, direct communication may be performed between the power meter 20 (the meter reading handset 15) and the dwelling unit terminal 11 without the communication device 12 interposed. In this case, the communication device 12 becomes unnecessary. When the communication device 12 is omitted, it is desirable to use a communication path by wireless communication for communication between the meter reading handset 15 and the dwelling unit terminal 11 instead of power line carrier communication. This is because if the power line carrier communication is directly performed between the meter-reading handset 15 and the dwelling unit terminal 11, a communication path cannot be secured when the main breaker or the branch breaker is shut off. In addition, since the communication device 12 forms a communication path extending between the primary side of the main breaker and the secondary side of the branch breaker, when the communication device 12 is used, the communication path is set even when the main breaker or the branch breaker is shut off. It can be secured.

  In the above configuration, the power meter 20 is provided outside the distribution board 21, but the meter reading value of the power meter 20 is presented to the dwelling unit terminal 11, and it is unnecessary to visually check the meter reading value. It is also possible to incorporate the power meter 20 in the distribution board 21. In this configuration, the communication device 12 is not necessary. In this case, since the communication device 12 is not provided, the meter-reading terminal 15 that has received meter-reading information from another meter such as the gas meter 28 or the water meter 29 transfers the meter-reading information to the dwelling unit terminal 11. .

  By the way, in this embodiment, as shown in FIG. The photovoltaic power generation facility 40 stores a solar cell panel 41 disposed on the roof or wall of the apartment house 10, a power conditioner 42 that converts DC power output from the solar cell panel 41 into AC power, and stores surplus power. The storage battery 43 is provided. The power conditioner 42 also has a function of managing charging and discharging of the storage battery 43, and can communicate with other devices connected to the distribution line 22 by power line carrier communication.

  The solar power generation facility 40 is connected so as to be connected to the grid. In the illustrated example, the photovoltaic power generation facility 40 (the output of the power conditioner 42) is connected to the system on the secondary side of the step-down transformer 23. In the present embodiment, it is assumed that all the electric power generated by the solar power generation facility 40 is sold to an electric power company, and the amount of electric power generated by the solar power generation facility 40 and reversely flowing to the distribution network 24 is It is measured by a power meter 26 for selling power arranged in the electric room 103 of the apartment house 10 or the like.

  The measurement result of the power meter 26 for power sale is transmitted to the management device 31 through the communication path 4 in the same manner as the power meter 25 for power purchase. That is, the power meter 26 transmits the measurement result to the communication master unit 33 attached to the ONU 32 through the communication slave unit 34, and further transmits the measurement result to the management device 31 through the ONU 32 and the communication path 4.

  By the way, as mentioned above, when purchasing all the electric power generated by the solar power generation facility 40, if other solar power generation facilities are also connected to the grid, the power supplied to the distribution network 24 May become excessive during peak power generation. Therefore, the storage battery 43 may be stored at the peak of generated power, and the power of the storage battery 43 may be sold when the generated power is insufficient.

  Alternatively, the power generated by the solar power generation facility 40 may be used in the apartment house 10, and when surplus power that cannot be consumed is generated, the power may be sold or stored in the storage battery 43. In addition, if the surplus power generated by the solar power generation facility 40 is used in the common part of the apartment house 10, the common service cost of the apartment house 10 can be reduced.

  Since the solar power generation facility 40 is operated by an energy management company, the energy management company collects the costs associated with the installation and maintenance of the solar power generation facility 40 by obtaining a price for the power generated by the solar power generation facility 40. can do. In addition, since the energy management company uses the apartment house 10 as an installation place of the photovoltaic power generation equipment 40, the electricity fee for the consumer of the apartment house 10 is used by using a part of the profit obtained by the power sale as a source. By discounting, the usage amount of the place may be returned to the consumer.

DESCRIPTION OF SYMBOLS 1 Local communication network 2 Communication path 3 Public network 10 Apartment house (building)
11 Dwelling unit terminal (information terminal)
12 Communication Device 13 Aggregation Device 15 Meter Reading Terminal 20 Power Meter (Meter)
21 Distribution board 22 Distribution line 28 Gas meter (meter)
29 Water meter (meter)
30 Management device 101 Dwelling unit (space)
111 Power line communication interface (first communication interface)
112 communication interface (second communication interface)
113 Protocol converter 221 Dedicated distribution line (distribution line)

Claims (3)

A meter-reading terminal that acquires meter-reading information from meters that respectively measure the amount of the supply medium used in each space in a building provided with a plurality of spaces occupied by consumers who use the supply medium supplied from a supplier,
An information terminal that is arranged in each space and communicates with the meter-reading terminal;
A distribution board arranged in each space;
A communication device housed in the distribution board and relaying a communication signal between the meter reading terminal and the information terminal;
An aggregation device that communicates with the information terminal using a local communication network laid in the building and aggregates the meter reading information acquired by the information terminal from the meter reading terminal;
The meter reading information aggregated by the aggregation device is transmitted to a management device provided outside the building.   A meter-reading terminal that acquires meter-reading information from meters that respectively measure the amount of the supply medium used in each space in a building provided with a plurality of spaces occupied by consumers who use the supply medium supplied from a supplier, Relaying communication signals to and from an information terminal that transmits the meter reading information arranged in each space and acquired from the meter reading terminal to an aggregation device using a local communication network laid in the building, and arranged in the space The communication device is housed in a distributed distribution board.   3. A distribution board characterized by being arranged in a space occupied by a consumer who uses a supply medium supplied from a supplier and housing the communication device according to claim 2.

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