JP7051230B2 - Power line communication system - Google Patents

Description

The present invention relates to a power line communication system in which a measured value measured by a power meter is transmitted to a power line by a power line communication method and collected by a concentrator.

Conventionally, as this kind of power line communication system, for example, there is a communication system disclosed in Patent Document 1. This communication system includes a plurality of meter reading devices to be powered and a management device for managing these meter reading devices. Each meter reading device and management device has power line communication (PLC) and wireless communication (RF) functions, and communicates with each other in multi-hop using a power line communication method, and communicates with each other in multi hop using a wireless communication method. The control circuit of the management device sets the power line communication method as the main communication method of the communication network, and sets the main route from the management device to the fourth meter reading device as the route having the minimum route cost. If the communication with the fourth meter reading device using the main route fails, the fourth meter reading device notifies the management device of the communication failure. When the control circuit of the management device detects the failure of communication using the main route, it selects at least one of the alternative route of the alternative communication method, the alternative route of the main communication method, or the alternative route of the mixed communication method of both. , Set to an alternative route based on the route cost. Then, communication with the fourth meter reading device is started using the alternative route.

Japanese Patent No. 6292378

However, in the above-mentioned conventional communication system, the failure of communication in the main route between the management device and the meter reading device can be compensated by using an alternative route, but the management device of the meter reading device newly entering the communication system. We cannot compensate for the failure of communication with.

The present invention has been made to solve such a problem.
Child side power line communication circuit that communicates by power line communication method using power line, wireless communication circuit that communicates wirelessly, child side control circuit that controls child side power line communication circuit and wireless communication circuit, and metering circuit that measures electric energy With multiple electricity meters and
Each power is received by the master side power line communication circuit by receiving the measurement value of the master side power line communication circuit that communicates with the child side power line communication circuit via the power line by the power line communication method and the measurement circuit transmitted from the child side power line communication circuit. In a power line communication system including a concentrator having a master control circuit for collecting measured values measured by a measuring circuit of a metric meter.
In the child side control circuit of the watt hour meter already registered in the power line communication system by the master side control circuit, the watt hour meter newly entering the power line communication system cannot communicate with the master side power line communication circuit by the child side power line communication circuit. When the wireless communication circuit receives a complementary connection request that is sometimes transmitted wirelessly by the wireless communication circuit, the child side requests registration of the newly entering watt-hour meter in the power line communication system in place of the newly entering watt-hour meter. Use the power line communication circuit to go to the master power line communication circuit,
When the master control circuit receives the registration request in the master power line communication circuit, the master control circuit registers the newly entering watt-hour meter in the power line communication system by linking it to the watt-hour meter having the child side power line communication circuit that sent the registration request. It is characterized by doing.

According to this configuration, if the watt hour meter newly entering the power line communication system fails to communicate with the concentrator by the power line communication method, the watt hour meter newly entering the power line communication system is wireless. The complementary connection request wirelessly transmitted by the communication circuit is received by the wireless communication circuit of the watt-hour meter already registered in the power line communication system. Then, by the child side control circuit of this watt-hour meter, the proxy registration request to the power line communication system of the newly entering watt-hour meter is sent by the child side power line communication circuit of the watt-hour meter already registered in the power line communication system. Power line communication is performed to the main power line communication circuit. The concentrator device that has received this proxy registration request registers the newly entering watt-hour meter in the power line communication system by associating it with the watt-hour meter that transmitted the registration request by the master control circuit. Therefore, the failure of communication with the concentrator of the watt-hour meter newly entering the power line communication system, which cannot be performed by the conventional power line communication system, can be compensated.

In addition, the present invention
When the child control circuit detects the wiring method of the power line connected to the watt-hour meter when it is supplied with power and starts up, and if the wiring method using three-phase AC voltage is detected, it is complemented by the wireless communication circuit. Wirelessly send a connection request,
When the child side control circuit of the power meter connected to the power line of the wiring system using the single-phase AC voltage receives the complementary connection request in the wireless communication circuit, the power line of the wiring system using the three-phase AC voltage is used. A request for registration of the connected power meter to the power line communication system in the power line of the wiring method using the single-phase AC voltage is made to the master power line communication circuit by the child side power line communication circuit.
When the master side control circuit receives the registration request in the master side power line communication circuit, it is linked to the watt-hour meter having the child side power line communication circuit that sent the registration request, and becomes a wiring type power line using a three-phase AC voltage. The feature is that the connected watt-hour meter is registered in the power line communication system in the power line of the wiring system using the single-phase AC voltage.

According to this configuration, if the watt-hour meter newly entering the power line communication system is a three-phase watt-hour meter connected to a three-phase power line of a wiring method using a three-phase AC voltage, the child side control circuit If detected at the time of activation, the child control circuit wirelessly transmits a complementary connection request by the wireless communication circuit. When this complementary connection request is received by the wireless communication circuit of the registered single-phase power meter already registered in the power line communication system in the power line of the wiring method using the single-phase AC voltage, the registered single-phase power is received. The child side control circuit of the meter makes a proxy registration request to the power line communication system of the three-phase power meter, and the child side power line communication circuit of the registered single-phase power meter makes a power line communication to the master power line communication circuit. .. The concentrator device that has received this proxy registration request registers the three-phase watt-hour meter in the power line communication system by associating it with the registered single-phase watt-hour meter that sent the registration request by the master control circuit. For this reason, communication failures with the watt-hour meter concentrator, which is newly entering the power line communication system, which could not be done with the conventional power line communication system, can be compensated for, and high frequency utilization equipment can be installed individually. A three-phase watt-hour meter that cannot build a power line communication system with a three-phase power line without permission is registered in the power line communication system for a single-phase power line, which is exempted from individual installation permission for high-frequency equipment by receiving a model designation. , It becomes possible to manage in the power line communication system.

According to the present invention, it is possible to provide a power line communication system capable of compensating for a communication failure with a concentrator of a watt-hour meter newly entering the power line communication system, which was not possible with a conventional power line communication system. Will be possible.

It is a block diagram which shows the structure of the power line communication system by 1st Embodiment of this invention. (A) is a block diagram showing an internal configuration of a watt-hour meter constituting the power line communication system shown in FIG. 1, and (b) is a block diagram showing an internal configuration of a concentrator. It is a figure which shows the operation sequence between the watt-hour meter and the concentrator shown in FIG. It is a block diagram which shows the ambient structure of the power line communication system by 2nd Embodiment of this invention. It is a figure which shows the operation sequence between the watt-hour meter and the concentrator shown in FIG.

Next, a mode for implementing the power line communication system according to the present invention will be described.

FIG. 1 is a block diagram showing a configuration of a power line communication system 1 according to the first embodiment of the present invention. The power line communication system 1 is configured by connecting a plurality of watt-hour meters A, B, C ... And a concentrator (hereinafter referred to as a concentrator) 2 to the power line 3.

The schematic internal configuration of each watt-hour meter A, B, C ... Is shown in the block diagram of FIG. 2 (a). Each watt-hour meter A, B, C ... includes a terminal device 7 composed of a child-side power line communication circuit 4, a wireless communication circuit 5, and a child-side control circuit 6, and a measuring instrument 9 composed of a measuring circuit 8. It is generally called a smart meter. The measuring circuit 8 of the measuring instrument 9 detects the voltage and current supplied to the consumer by the power line 3, and measures the amount of power used by the consumer in which each watt-hour meter A, B, C ... Is installed. The child side power line communication circuit 4 of the terminal device 7 has a function of communicating by a power line communication (PLC) method using the power line 3, and the wireless communication circuit 5 has a function of wirelessly communicating by a specific low power radio. Has. The child side control circuit 6 controls the child side power line communication circuit 4 and the wireless communication circuit 5, and transmits the measured value measured by the measuring circuit 8 to the power line 3 by the child side power line communication circuit 4.

The schematic internal configuration of the concentrator 2 is shown in the block diagram of FIG. 2 (b). The concentrator 2 is composed of a master power line communication circuit 10, a wireless communication circuit 16, and a master control circuit 11. The master side power line communication circuit 10 has a function of communicating with the child side power line communication circuits 4 of the watt-hour meters A, B, C ... via the power line 3 by the power line communication method, and the wireless communication circuit 16 has a specific small size. It has a function of wireless communication by power wireless. The master side control circuit 11 receives the measurement value of the measurement circuit 8 transmitted from the child side power line communication circuit 4 by the master side power line communication circuit 10, and the measurement circuit 8 of each watt-hour meter A, B, C ... Weighed values are collected every 30 minutes. The collected measurement values are transmitted to an MDMS (Meter Data Management System) (not shown).

The power line communication in this embodiment is performed by a method compliant with the G3-PLC standard. In the master side control circuit 11 of the concentrator 2, the watt-hour meters A, B, C ... Are already registered in the power line communication system 1 as the target of measurement value collection, and the power lines with the watt-hour meters A, B, C ... The power line communication via 3 is ready. The watt-hour meter D has not yet been registered in the power line communication system 1 and is not recognized by the master control circuit 11. The watt-hour meter D has the same configuration as the watt-hour meters A, B, C ..., And the internal configuration is shown in FIG. 2 (a). This time, the watt-hour meter D tried to communicate with the master power line communication circuit 10 via the power line 3 by the child side power line communication circuit 4 of the terminal device 7 in order to newly enter the power line communication system 1. Is not possible, and it is assumed that communication has failed. In this case, in the power line communication system 1 according to the present embodiment, the electric energy meter D newly enters the power line communication system 1 by wireless complementation as follows.

FIG. 3 is a diagram showing an operation sequence between the watt-hour meter D, the watt-hour meter C, and the concentrator 2 at this time. It is assumed that time elapses from the upper side to the lower side of the figure in this operation sequence. Since the watt-hour meters A and B also perform the same operation as the watt-hour meter C, the description of the operation sequence will be omitted.

The watt-hour meter D, which has failed to enter the power line communication system 1 by power line communication, wirelessly transmits a beacon signal from the wireless communication circuit 5 of the terminal device 7 to the surroundings and requests communication with a new partner ((1)). Beacon request). Upon receiving the beacon signal, the watt-hour meter C wirelessly transmits the beacon signal from its own wireless communication circuit 5 to the surroundings and responds ((2) beacon response) in response to the beacon request. The watt-hour meter D, which has received the beacon signal having the highest signal strength from the watt-hour meter C by this beacon response, receives the watt-hour meter C from its wireless communication circuit 5 to request a complementary connection to the power line communication system 1. Send to ((3) Complementary connection request). When the watt-hour meter C receives the complementary connection request signal to the wireless communication circuit 5, the watt-hour meter D receives the watt-hour meter D's complementary connection request signal to the power line communication system 1 under the control of the child side control circuit 6. Instead, it is transmitted from the child-side power line communication circuit 4 to the power line 3 ((4) Request for proxy registration of the watt-hour meter D).

The concentrator 2 that has received the proxy registration request signal of the watt-hour meter D from the watt-hour meter C to the master-side power line communication circuit 10 is stored in the memory of the master-side control circuit 11 that stores the watt-hour meter for which the measured value is to be collected. , A new electricity meter D is stored. At the time of this registration of the watt-hour meter D in the power line communication system 1, the watt-hour meter D is associated with the watt-hour meter C and stored in the memory. When the concentrator 2 completes the registration of the watt-hour meter D in the power line communication system 1, a response signal indicating that the registration of the watt-hour meter D in the power line communication system 1 is completed under the control of the master control circuit 11 is output. Transmission from the main power line communication circuit 10 to the power line 3 ((5) proxy registration response of the watt hour meter D). When the watt-hour meter C receives this response signal for which registration has been completed from the concentrator 2 to the child-side power line communication circuit 4, the watt-hour meter D is complementarily connected to the power line communication system 1 after the proxy registration to the power line communication system 1 is completed. A response signal indicating that the response has been made is wirelessly transmitted from the wireless communication circuit 5 to the watt-hour meter D under the control of the child control circuit 6 ((6) Complementary connection response).

That is, when the watt-hour meter D newly entering the power line communication system 1 cannot communicate with the master power line communication circuit 10 by the child power line communication circuit 4, the wireless communication circuit 5 wirelessly transmits a complementary connection request. The child side control circuit 6 of the watt hour meter C already registered in the power line communication system 1 by the master side control circuit 11 newly enters when the wireless communication circuit 5 receives the complementary connection request transmitted by the watt hour meter D. A proxy registration request to the power line communication system 1 of the watt-hour meter D, which newly enters in place of the watt-hour meter D, is made to the master power line communication circuit 10 by the child side power line communication circuit 4. When the master side control circuit 11 of the concentrator 2 receives this proxy registration request in the master side power line communication circuit 10, it newly enters by associating it with the watt-hour meter C having the child side power line communication circuit 4 that has transmitted the registration request. The electric energy meter D to be used is registered in the power line communication system 1.

After the watt-hour meter D is registered in the power line communication system 1, the command request signal such as the measurement value transmission command transmitted from the concentrator 2 to the watt-hour meter D at any time is the electric energy associated with the watt-hour meter D. It is transmitted from the master power line communication circuit 10 to the power line 3 under the control of the master control circuit 11 to the meter C ((7) Request a command at any time to the watt-hour meter D). When the watt-hour meter C receives the command signal from the concentrator 2 to the child-side power line communication circuit 4, the received watt-hour meter C is transferred from the wireless communication circuit 5 to the watt-hour meter D by wireless communication ((8) at any time. Order request). When the watt-hour meter D receives the watt-hour meter C from the watt-hour meter C to the wireless communication circuit 5, the watt-hour meter D controls the response signal corresponding to the command request at any time, such as transmitting the metric value measured by the metric circuit 8. Wireless transmission is performed from the wireless communication circuit 5 under the control of the circuit 6 ((9) command response at any time). When the watt-hour meter C receives the command response signal from the watt-hour meter D at any time, the watt-hour meter C transmits the response signal received from the watt-hour meter D from the child-side power line communication circuit 4 to the power line 3 under the control of the child-side control circuit 6. ((10) Response to command from time to time addressed to watt-hour meter D).

According to the power line communication system 1 according to the present embodiment, when the power line communication method of the power meter D newly entering the power line communication system 1 fails to communicate with the concentrator 2. The complementary connection request that the watt-hour meter D newly entering the system 1 wirelessly transmits by the watt-hour meter D is received by the watt-hour meter C's wireless communication circuit 5 already registered in the power line communication system 1. Then, by the child side control circuit 6 of the watt-hour meter C, the proxy registration request to the power line communication system 1 of the newly entering watt-hour meter D is the power meter C already registered in the power line communication system 1. The child side power line communication circuit 4 performs power line communication to the master side power line communication circuit 10, and the master side control circuit 11 links the watt hour meter C that has transmitted the registration request to the watt hour meter D that newly enters the power line. Registered in communication system 1. Therefore, the failure of communication with the concentrator 2 of the watt-hour meter D, which newly enters the power line communication system 1, which cannot be performed by the conventional power line communication system, can be compensated.

In the above embodiment, the watt-hour meter D newly entering the power line communication system 1 communicates with the master power line communication circuit 10 via the child side power line communication circuit 4 of the watt-hour meter C, and the electric energy is used. A case where the meter C is registered as a proxy in the power line communication system 1 has been described. However, when the watt-hour meter D is located close to the watt-hour meter 2 and the watt-hour meter D's wireless communication circuit 5 is at a distance where it can communicate with the watt-hour meter 2's wireless communication circuit 16, the watt-hour meter C or the like is not used. In addition, the watt-hour meter D can newly enter the power line communication system 1 by directly performing wireless communication with the concentrator 2.

Next, the power line communication system according to the second embodiment of the present invention will be described. FIG. 4 is a block diagram showing a configuration around the power line communication system 1 according to the second embodiment. In FIG. 4, the same or corresponding parts as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted.

In the power line communication system 1 according to the second embodiment, the power line 3 to which the concentrator 2 and the plurality of electric energy meters A, B, C ... Are connected uses the single-phase AC power supply output from the single-phase AC power supply 12 for the lamp. Supply to consumers as. On the other hand, the power line 13 to which the three-phase electric energy meters E and F are connected supplies the three-phase AC power output from the three-phase AC power supply 14 to the consumer for power. The internal configurations of the three-phase watt-hour meters E and F are basically the same as those shown in FIG. 2 (a).

Communication equipment that passes high-frequency current of 10 kHz or more through electric lines must obtain permission from the Minister of Internal Affairs and Communications to install high-frequency use equipment. The power line communication system 1 that uses the power line communication method of the G3-PLC standard corresponds to this "communication equipment that passes a high frequency current of 10 kHz or more". Communication equipment that has been designated by the Minister of Internal Affairs and Communications is exempt from individual installation permits for high-frequency equipment, but is limited to the use of single-phase two-wire or single-phase three-wire power lines that pass through single-phase alternating current.

Therefore, the power line communication system 1 that transmits the single-phase AC from the single-phase AC power supply 12 to the power line 3 is individually specified by the Minister of Internal Affairs and Communications, that is, for each property in which the power line communication system 1 is installed. , You do not have to get permission to install high frequency equipment. However, when three-phase AC is connected from the three-phase AC power supply 14 to the three-phase three-wire system or three-phase four-wire system power line 13 by the power line communication system, the communication bureau of the Ministry of Internal Affairs and Communications for each property where the power line communication system is installed. It is necessary to submit a "application for high frequency equipment" to the Minister of Internal Affairs and Communications and obtain permission to install high frequency equipment. In order to make this "application for high frequency equipment", many application documents such as the serial number and specifications of the equipment to be installed and the single wire connection diagram of the building must be prepared. Therefore, since it takes about one month from the application to the installation permission, a lot of time and effort are required to construct the power line communication system on the power line 13 passing through the three-phase alternating current. For this reason, it has not been easy in the past to collect the measured values measured by the three-phase watt-hour meters E and F connected to the three-phase three-wire system or three-phase four-wire system power line 13.

In the power line communication system 1 according to the second embodiment, the three-phase watt-hour meters E and F are newly registered in the power line communication system 1 and connected to the power line 13 of the three-phase AC voltage as follows. It is easy to collect the measured values measured by the watt-hour meters E and F.

FIG. 5 is a diagram showing an operation sequence between the three-phase watt-hour meter F, the single-phase watt-hour meters D and C, and the concentrator 2. It is assumed that time elapses from the upper side to the lower side of the figure in this operation sequence as well. Further, the operation sequence surrounded by the dotted line 15 is the same as the operation sequence shown in FIG. 3, and the description thereof will be omitted. Further, since the three-phase watt-hour meter E also performs the same operation as the three-phase watt-hour meter F, the description of the operation sequence will be omitted.

The child side control circuit 6 of each watt-hour meter C, D, F is wired to the watt-hour meters 3, 13 connected to the watt-hour meter C, D, F when it is started by receiving power supply from the watt-hour meters 3, 13. Detect the method ((11) Wiring method check). This wiring method check is performed by referring to the measuring circuit 8 of the measuring instrument 9 by the child side control circuit 6 of the terminal device 7. Since the single-phase watt-hour meters C and D are connected to the power line 3 for distributing the single-phase AC from the single-phase AC power supply 12, the single-phase two-wire system or the single-phase three-wire system wiring is performed by the child side control circuit 6. The method is detected. Therefore, when the terminal devices 7 of the single-phase watt-hour meters C and D are started, the child side power line communication circuit 4 communicates with the master side power line communication circuit 10 by power line communication.

Since the three-phase watt-hour meter F is connected to the power line 13 that distributes the three-phase AC from the three-phase AC power supply 14, the three-phase three-wire system or the three-phase four-wire system wiring method can be used by the child side control circuit 6. Detected. Therefore, when the terminal device 7 of the three-phase watt-hour meter F that detects the three-phase alternating current is activated, the wireless communication circuit 5 wirelessly transmits a beacon signal to the surroundings and requests communication with a new partner ((12). ) Beacon request). That is, the three-phase watt-hour meter F adopts the wiring method of the power line 13 connected to the three-phase watt-hour meter F when the child side control circuit 6 of the terminal device 7 receives power from the power line 13 and starts up. Detect. Then, when the wiring method using the three-phase AC voltage is detected, the three-phase watt-hour meter F wirelessly transmits the complementary connection request by the wireless communication circuit 5 of the terminal device 7.

Upon receiving the beacon signal, the single-phase watt-hour meter C wirelessly transmits the beacon signal from its own wireless communication circuit 5 to the surroundings in response to the beacon request ((13) beacon response). Upon receiving the beacon signal having the highest signal strength from the single-phase watt-hour meter C by this beacon response, the three-phase watt-hour meter F receives a wireless signal from the wireless communication circuit 5 requesting a complementary connection to the power line communication system 1. It is transmitted to the single-phase watt-hour meter C ((14) Complementary connection request). When the single-phase watt-hour meter C receives the complementary connection request signal in the wireless communication circuit 5, the single-phase watt-hour meter C receives the complementary connection request signal to the power line communication system 1 of the three-phase watt-hour meter F under the control of the child side control circuit 6. It is transmitted from the child side power line communication circuit 4 to the power line 3 instead of the phase watt-hour meter F ((15) Request for proxy registration of the watt-hour meter F). That is, when the child side control circuit 6 of the terminal device 7 receives the complementary connection request in the wireless communication circuit 5, the watt-hour meter C connected to the power line 3 of the wiring method using the single-phase AC voltage is used. Child side power line communication of the three-phase watt-hour meter F connected to the power line 13 of the wiring method using the three-phase AC voltage to the power line communication system 1 in the power line 3 of the wiring method using the single-phase AC voltage. The circuit 4 is used to connect to the master power line communication circuit 10.

The concentrator 2 that has received the signal requesting proxy registration of the three-phase watt-hour meter F from the single-phase watt-hour meter C to the master-side watt-hour meter communication circuit 10 is the master side that stores the watt-hour meter for which the measured value is to be collected. A three-phase watt-hour meter F is newly stored in the memory of the control circuit 11. At the time of this registration of the three-phase watt-hour meter F in the power line communication system 1, the three-phase watt-hour meter F is associated with the single-phase watt-hour meter C and stored in the memory. That is, when the master side control circuit 11 receives the registration request in the master side power line communication circuit 10, the concentrator 2 is associated with the single-phase power meter C having the child side power line communication circuit 4 that has transmitted the registration request. The three-phase power meter F connected to the power line 13 of the wiring system using the three-phase AC voltage is registered in the power line communication system 1 in the power line 3 of the wiring system using the single-phase AC voltage.

When the concentrator 2 completes the registration of the three-phase watt-hour meter F in the power line communication system 1, the registration of the three-phase watt-hour meter F in the power line communication system 1 is completed by the control of the master control circuit 11. The representative response signal is transmitted from the master power line communication circuit 10 to the power line 3 ((16) proxy registration response of the watt-hour meter F). When the single-phase watt-hour meter C receives this response signal indicating that the registration is completed from the concentrator 2 to the child-side power line communication circuit 4, the single-phase watt-hour meter C completes the proxy registration to the power line communication system 1 and has three phases in the power line communication system 1. A signal indicating that the watt-hour meter F is complementarily connected is wirelessly transmitted from the wireless communication circuit 5 to the three-phase watt-hour meter F under the control of the child side control circuit 6 ((17) complementary connection response).

After the registration of the three-phase watt-hour meter F in the power line communication system 1, the command request signal such as the measurement value transmission command transmitted from the concentrator 2 to the three-phase watt-hour meter F at any time is sent to the three-phase watt-hour meter F. It is sent from the master power line communication circuit 10 to the power line 3 under the control of the master control circuit 11 to the associated single-phase watt-hour meter C ((18) a command request to the watt-hour meter F at any time). When the single-phase watt-hour meter C receives this occasional command signal from the concentrator 2 to the child-side power line communication circuit 4, the single-phase watt-hour meter C transfers the received occasional watt-hour meter F from the wireless communication circuit 5 to the three-phase watt-hour meter F by wireless communication ( (19) Request for instructions from time to time). When the three-phase watt-hour meter F receives the occasional command request signal from the single-phase watt-hour meter C to the wireless communication circuit 5, the three-phase watt-hour meter F transmits the measured value measured by the measuring circuit 8 as a response signal corresponding to the occasional command request. Is wirelessly transmitted from the wireless communication circuit 5 under the control of the child side control circuit 6 ((20) at any time command response). When the single-phase watt-hour meter C receives the command response signal from the three-phase watt-hour meter F to the wireless communication circuit 5, the response signal received from the three-phase watt-hour meter F is controlled by the child-side control circuit 6. Transmission from the child-side power line communication circuit 4 to the power line 3 ((21) Response to command at any time addressed to the watt-hour meter F).

According to the power line communication system 1 according to the second embodiment, the watt-hour meter newly entering the power line communication system 1 is connected to the three-phase power line 13 of the wiring method using the three-phase AC voltage. When the phase watt-hour meters E and F are detected by the child side control circuit 6 of those terminal devices 7 at the time of activation, the child side control circuit 6 wirelessly transmits a complementary connection request by the wireless communication circuit 5. This complementary connection request is received by the wireless communication circuit 5 of the terminal device 7 of the registered watt-hour meter C already registered in the power line communication system 1 in the power line 3 of the wiring method using the single-phase AC voltage. And, by the child side control circuit 6 of the registered single-phase watt-hour meter C, the proxy registration request to the power line communication system 1 of the three-phase watt-hour meters E and F is sent to the child side of the registered single-phase watt-hour meter C. Power line communication is performed by the power line communication circuit 4 to the master power line communication circuit 10 of the concentrator 2. The concentrator 2 that has received this proxy registration request registers the three-phase watt-hour meters E and F in the power line communication system 1 by associating it with the registered single-phase watt-hour meter C that has transmitted the registration request by the master control circuit 11. do.

Therefore, according to the power line communication system 1 according to the second embodiment, communication failure with the concentrator 2 of the watt-hour meter D newly entering the power line communication system 1 which could not be performed by the conventional power line communication system. The three-phase watt-hour meters E and F, which cannot build a power line communication system using three-phase power lines without obtaining permission to install individual high-frequency power equipment, receive high-frequency specifications. It is registered in the power line communication system 1 in the single-phase power line exempted from the individual installation permission of the equipment to be used, and can be managed in the power line communication system 1.

1 ... Power line communication system 2 ... Concentrator (concentrator)
3,13 ... Power line 4 ... Child side power line communication circuit 5,16 ... Wireless communication circuit 6 ... Child side control circuit 7 ... Terminal device 8 ... Measuring circuit 9 ... Measuring instrument 10 ... Parent side power line communication circuit 11 ... Parent side control circuit 12 ... Single-phase AC power supply 14 ... Three-phase AC power supply

Claims (2)

The child side power line communication circuit that communicates by the power line communication method using the power line, the wireless communication circuit that communicates wirelessly, the child side power line communication circuit and the child side control circuit that controls the wireless communication circuit, and the electric energy are measured. With multiple watt-hour meters with weighing circuits,
The master side power line communication circuit receives the measurement values of the master side power line communication circuit that communicates with the child side power line communication circuit via the power line in the power line communication method and the measurement circuit transmitted from the child side power line communication circuit. In a power line communication system including a concentrator having a master control circuit for collecting the measured values measured by the measuring circuit of each watt-hour meter.
The child side control circuit of the watt hour meter already registered in the power line communication system by the master side control circuit is such that the watt hour meter newly entering the power line communication system is described by the child side power line communication circuit. When the wireless communication circuit receives a complementary connection request to be wirelessly transmitted by the wireless communication circuit when communication with the main power line communication circuit is not possible, the amount of power newly entered in place of the newly entered watt-hour meter. A registration request to the power line communication system of the meter is made to the master power line communication circuit by the child side power line communication circuit.
When the master-side control circuit receives the registration request in the master-side power line communication circuit, the master-side control circuit newly enters the electric energy meter associated with the watt-hour meter having the child-side power line communication circuit that has transmitted the registration request. A power line communication system characterized in that a meter is registered in the power line communication system. The child-side control circuit detects the wiring method of the power line connected to the watt-hour meter when it is started by receiving power supply, and when the wiring method using the three-phase AC voltage is detected, the wireless communication. Wireless transmission of complementary connection request by circuit,
The child side control circuit of the power meter connected to the power line of the wiring method using the single-phase AC voltage is the wiring using the three-phase AC voltage when the complementary connection request is received by the wireless communication circuit. A request for registration of the power meter connected to the power line of the system to the power line communication system in the power line of the wiring system using a single-phase AC voltage is made to the master power line communication circuit by the child side power line communication circuit.
When the master side control circuit receives the registration request in the master side power line communication circuit, the master side control circuit uses a three-phase AC voltage in association with the power meter having the child side power line communication circuit that has transmitted the registration request. The power line communication system according to claim 1, wherein the power meter connected to the power line of the wiring system is registered in the power line communication system of the power line of the wiring system using a single-phase AC voltage.

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