WO2006134655A1

WO2006134655A1 - Power line propagation communication system

Info

Publication number: WO2006134655A1
Application number: PCT/JP2005/011058
Authority: WO
Inventors: Masafumi Narikawa
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2005-06-16
Filing date: 2005-06-16
Publication date: 2006-12-21
Also published as: JP4712037B2; TW200705854A; JPWO2006134655A1

Abstract

A power line propagation communication system wherein power line propagation communication units (6b,6c) are coupled, via low voltage distribution line couplers (18a,18b), to a communication line (13c) provided for the monitoring/control of a switching device (11c) that performs electrical connection/disconnection between low voltage distribution lines (3a,3b,3c) and high voltage distribution lines (1a,1b,1c), thereby performing communication between the communication terminal apparatuses or between the communication terminal apparatus and an upper-order network (9) via the communication line (13c) and power line propagation communication units (6b,6c). Because of the connection of the low voltage distribution line couplers to the communication line, there is no need of conducting any power interruption and electrical work or the like of the low voltage distribution lines that would otherwise be required for the connection of the low voltage distribution line couplers.

Description

Power line carrier communication system

Technical field

TECHNICAL FIELD [0001] The present invention relates to a power line transport communication system in which a communication carrier wave is superimposed on a power line, and communication is performed between communication terminal devices installed in a customer's house or between the communication terminal device and a higher-level network. is there.

Background art

[0002] A power line carrier communication system uses an optical fiber and a low-voltage distribution line or the like between communication terminal devices such as a personal computer installed in a customer's house or between the communication terminal device and an upper network such as the Internet. Communication between the two.

FIG. 7 is a configuration diagram showing an outline of a conventional power line carrier communication system disclosed in Patent Document 1, for example. In FIG. 7, the high-voltage power supplied to the high-voltage distribution line 1 is transformed into low-voltage power by the distribution transformers 2a and 2b and supplied to the low-voltage distribution line 3. The customer homes 4a and 4b are supplied with low voltage power from the low voltage distribution line 3.

[0004] On the other hand, a communication optical fiber 4 is laid along the high-voltage distribution line 1, and the communication data sent through this optical fiber is converted into an optical signal by the optical Z electrical change 5a, 5b. And sent to the power line carrier communicators 6a and 6b as the master station. The power line carrier transceivers 6a and 6b modulate the data and superimpose it on the low-voltage distribution line 3 with a carrier wave. Power line carrier communication devices 7a and 7b as slave stations installed in each customer's house 4a and 4b demodulate data from the carrier wave superimposed on the low voltage distribution line 3, and communication terminal devices 8a and 8b such as personal computers. To supply.

[0005] The power line carrier communication system configured as described above can perform communication between the communication terminal devices 7a and 7b provided in the customer's homes 4a and 4b via the low-voltage distribution line 3, and can also perform Communication between the communication terminal devices 8a and 8b and the upper network 9 such as the Internet can be performed via the pressure distribution line 3 and the optical fiber 4.

Patent Document 1: Japanese Patent Laid-Open No. 2003-188780 (Pages 2-4, Figures 1-5)

Disclosure of the invention Problems to be solved by the invention

[0006] However, according to such a conventional power line communication system, if the low-voltage distribution line 3 cannot be installed due to a power failure, or if the voltage supplied to the low-voltage distribution line 3 is considerably high, When the wire diameter of the distribution line 3 is large, there is a problem that it is difficult to connect the power line carrier communication devices 6a and 6b as the master unit to the low-voltage distribution line 3.

[0007] The present invention has been made in order to solve the problems in such a conventional system. The power line carrier communicator is changed not only to a distribution line such as a low-voltage distribution line but also to a non-charged existing communication line. The present invention provides a power line carrier communication system that can be connected to perform communication between communication terminal devices installed in a customer's house, or between a communication terminal device and a host network.

Means for solving the problem

[0008] In the power line carrier communication system according to the present invention, a carrier wave is superimposed on the high-voltage distribution line and the low-voltage distribution line that supplies power to a customer's house by reducing the voltage supplied from the Z or the high-voltage distribution line. A power line carrier communication system that performs communication between communication terminal devices installed in a customer's house or between the communication terminal device and a higher-level network, wherein the electrical connection between the low-voltage distribution line and the high-voltage distribution line A power line carrier communicator is coupled to a communication line provided for monitoring control of the switchgear that opens and closes a connection via a coupler for a low voltage distribution line, and the communication terminal device via the communication line and the power line carrier communicator. A power line carrier communication system configured to perform communication between each other or between the communication terminal device and a host network.

The invention's effect

[0009] According to the power line carrier communication system of the present invention, the communication line provided for monitoring control of the switchgear for opening and closing the electrical connection between the low voltage distribution line and the high voltage distribution line is connected to the communication line via the low voltage distribution line coupler. Power line carrier communicators are coupled to perform communication between the communication terminal devices or between the communication terminal device and the upper network via the communication line and the power line carrier communicator. Even if a power outage is not possible, the voltage of the distribution line is very high, or the distribution line diameter is large and the power line carrier communication device cannot be connected to the distribution line! Connect the power line carrier communication device to the communication line without any problems Therefore, it is possible to stably perform communication between communication terminal apparatuses or between the communication terminal apparatus and an upper network.

BEST MODE FOR CARRYING OUT THE INVENTION

[0010] Embodiment 1.

FIG. 1 is a configuration diagram showing a power line carrier communication system according to Embodiment 1 of the present invention.

In Fig. 1, high-voltage power distributed by high-voltage distribution lines la, lb, lc, and Id is transformed to low-voltage power by transformers 2a, 2b, and 2c installed in substations 10a, 10b, and 10c. . The low voltage power transformed by the transformers 2a, 2b and 2c is supplied to the customer's homes 4a, 4b, 4c, 4d, 4e and 4f through the low voltage distribution lines 3a, 3b and 3c.

[0011] Each substation 10a, 10b, 10c is equipped with switchgears l la, l lb, 11c which are switchgears, high voltage distribution lines la, lb, lc, Id and transformers 2a, 2b 2c and the low-voltage distribution lines 3a, 3b, 3c are electrically connected via the switch gears lla, llb, 11c. Inside each of the switch gears lla, l ib and 11c, communication devices 12a, 12b and 12c for remotely monitoring and controlling the operation state of the switch gears l la, l ib and 11c are provided.

[0012] Each communication device 12a-12b-12c is connected to a communication device 15 provided in a control center 14 via communication lines 13a-13b 13c. Each communication line 13a, 13b, 13c is also configured with one or more cable forces used in a communication method such as a current loop method. The communication device 15 is connected to a remote monitoring control panel 16 provided in the control center 14.

[0013] The switch gears l la, l ib, and 11c provided in each of the substations 10a, 10b, and 10c are remotely connected via the communication devices 12a, 12b, and 12c, the communication lines 13a, 13b, and 13c, and the communication device 15, respectively. Monitored and controlled by the control panel 16.

[0014] The power line carrier communicator 6a as the master station is coupled to the high voltage distribution line lb via the high voltage distribution line coupler 17a and to the low voltage distribution line 3a via the low voltage distribution line coupler 19a. Are combined. The power line carrier communication device 6a is also connected to the upper network 9. The power line carrier communication device 6b as another master station is coupled to the high-voltage distribution line lb via the high-voltage distribution line coupler 17b and the communication line 13c via the low-voltage distribution line coupler 18a. Is bound to. Further, the power line carrier communication device 6b is also coupled to the low voltage distribution line 3b via a low voltage distribution line coupler 19b. The power line carrier communicator 6c as another master station is coupled to the communication line 13c via the low voltage distribution line coupler 18b, and is coupled to the low voltage distribution line 3c via the low voltage distribution line coupler 19c. ing.

[0015] Each of the high-voltage distribution line couplers 17a, 17b and the low-voltage distribution line couplers 19a, 19b, 19c, and 18a, 18b are known couplers. Also, power line carrier communication devices 6a, 6b, 6c

And a known modem having a modulation circuit and a demodulation circuit.

[0016] Power line carrier communication home devices 7a, 7b, 7c, 7d, 7e, 7f as slave stations provided in each customer home 4a, 4b, 4c, 4d, 4e, 4f are connected to each customer home 4a, 4b. 4c, 4d, 4e, and 4f are connected to the low-voltage distribution lines 3a, 3b, and 3c.

Communication terminal devices 8a, 8b, 8c, 8d, 8e, 8f such as personal computers installed in each customer's home 4a, 4b, 4c, 4d, 4e, 4f are the corresponding power line carrier communication home devices 7a, 7b ゝIt is connected to 7c ゝ 7d and 7e ゝ 7f.

[0017] The power line carrier telecommunication indoor devices 7a, 7b, 7c, 7d, 7e, 7f are configured by a known modem provided with a modulation circuit, a demodulation circuit, and the like.

[0018] Next, the coupling between the power line carrier communication device and the communication line in the power line carrier communication system according to Embodiment 1 of the present invention configured as described above will be described.

In FIG. 2, the power line carrier communicator 6c is connected to the communication line via the low voltage distribution line coupler 18b.

It is connected to the two cables that make up 13c. The low-voltage distribution line coupler 18b is a known coupler, and includes capacitors 181a and 181b, a coupling transformer 182, and a force.

The low-voltage distribution line coupler 18a is configured in the same manner as the low-voltage distribution line coupler 18b, and connects the power line carrier communication apparatus 6b to the two communication lines 13c.

In the first embodiment, power line carrier communicators 6b and 6c coupled to communication lines 13b and 13c are configured to communicate in a differential mode.

Next, the operation of the power line carrier communication system according to Embodiment 1 will be described.

In FIG. 1, power line carrier communicators 6a and 6b can communicate via high-voltage distribution line couplers 6a and 6b and high-voltage distribution line lb. Power line carrier communication devices 6b and 6c Communication can be performed via the wire couplers 18a and 18b and the communication line 13c. In addition, the power line carrier communication device 6a and the power line carrier communication home devices 7a and 7b can communicate with each other through the low voltage distribution line 3a, and the power line carrier communication device 6b and the power line carrier communication home devices 7c and 7d have a low pressure. Communication is possible through the distribution line 3b, and the power line carrier communication device 6c and the power line carrier communication in-home devices 7e and 7f can communicate through the low voltage distribution line 3c.

[0021] Thereby, the power line carrier telecommunication indoor devices 7a, 7b, 7c, 7d, 7e, 7f are transferred to the upper network 9 through the existing low voltage distribution lines 3a, 3b, 3c, the high voltage distribution line lb, and the communication line 13c. Can be connected. As a result, the communication terminal devices 8a, 8b, 8c, 8d, 8e, and 8f installed in the customer's homes 4a, 4b, 4c, 4d, 4e, and 4f, and between these communication terminal devices and the upper network 9 Communication is possible.

[0022] Embodiment 2.

In the first embodiment, the power line carrier communicator is connected to the two cables that make up the communication line, and the communication is performed in the differential mode. In the second embodiment, the power cable carrier communicator is connected to one cable that makes up the communication line. A power line carrier communicator is connected to communicate in common mode.

FIG. 3 is a configuration diagram showing coupling between the power line carrier communication device and the communication line in the power line carrier communication system according to the second embodiment.

In FIG. 3, the power line carrier communicator 6c is connected to one of the cables constituting the communication line 13c via a low voltage distribution line coupler 18b. The low-voltage distribution line coupler 18b is a well-known coupler, and includes capacitors 181a and 181b, a coupling transformer 182, and a force. The low voltage distribution line coupler 18b is grounded and communicates in common mode using one of the cables that make up the communication line. As a result, the number of cables used in the communication line can be reduced. The low-voltage distribution line coupler 18a is configured in the same manner as the low-voltage distribution line coupler 18b, and connects the power line carrier communication apparatus 6b to one of the cables constituting the communication line 13c.

The rest of the configuration of the power line carrier communication system in the second embodiment is the same as that in the first embodiment.

Embodiment 3. In the first embodiment, the power described in the case where one power line carrier communication device 6b and one power line carrier communication device 6c communicate 1: 1 using the communication line 13c. Thus, one power line carrier communication device and two or more power line carrier communication devices communicate with each other at 1: n (n> 1) using a communication line.

FIG. 4 is a configuration diagram showing coupling between the power line carrier communication device and the communication line in the power line carrier communication system according to the third embodiment.

In FIG. 4, the power line carrier communicator 61a is coupled to three sets of communication lines 130a, 130b, and 130c via a low voltage distribution line coupler 180a. The power line carrier communicators 6 lb, 61c, 61d are connected to the communication lines 130a, 130b, 130c by the low voltage distribution line couplers 180b, 180c, 180d, respectively.

Each power line carrier communicator 61a, 61b, 61c, 61d is coupled to two cables constituting each of the communication lines 130a, 130b, 130c, and communicates in a differential mode.

[0026] According to the apparatus of the third embodiment configured as described above, the power line carrier communication device 61a communicates with the three power line carrier communication devices 61b, 61c, 61d via the communication lines 130a, 130b, 130c. can do.

The other configuration of the power line carrier communication system in the third embodiment is the same as that in the first embodiment.

[0027] When using distribution lines instead of communication lines, one low-voltage distribution line coupler is required for one set of distribution lines to prevent short circuits. Communication lines 130a, 130b, and 130c are charged. Therefore, a single low-voltage distribution line coupler 180a can be used to simultaneously inject signals into the plurality of communication lines 130a, 130b, 130c.

[0028] Embodiment 4.

Next, as a fourth embodiment, a case where a ferrite core is used as a coupler for coupling a power line carrier communication device and a communication line will be described.

In FIG. 5, the ferrite core 18bl constituting the coupler for low-voltage distribution line 18b is penetrated by one cable constituting the communication line 13c. The ferrite core 18b2 constituting the low-voltage distribution line coupler 18b is penetrated by the other cable constituting the communication line 13c. The signal line derived from the power line carrier communication device 6c is a ferrite core 18bl. , Through each of 18b2. Therefore, the signal from the power line carrier communicator 6c is the traffic line = 3 181) 1, 18b2 [thus communication line 13c].

The other low-voltage distribution line coupler 18a may also be formed of a ferrite core, similar to the low-voltage distribution line coupler 18b. Other configurations are the same as those in the first embodiment.

[0029] According to the fourth embodiment, a signal can be injected in a non-contact manner into the power line carrier communication device 6c and the communication line 13c without disconnecting the communication line 13c.

[0030] Embodiment 5.

Next, Embodiment 5 will be described.

FIG. 6 is a configuration diagram showing a configuration of a main part of the power line carrier communication system according to the fifth embodiment.

In FIG. 6, power line carrier communicators 44a and 44b provided in a substation 43 are coupled to communication lines 46a and 46b via low-voltage distribution line couplers 45a and 45b, respectively. The communication lines 46a and 46b are connected by a low-pass filter 47.

The power line carrier communicators 44a and 44b, the low-voltage distribution line couplers 45a and 45b, and the low-pass filter 47 each have a well-known configuration.

In FIG. 6, switch gears, transformers and the like in the substation 43 are omitted.

Other configurations are substantially the same as those of the first embodiment.

[0031] According to the fifth embodiment, since the communication lines 46a and 46b are connected by the low-pass filter 47, communication is performed with the high-frequency signal of the power line carrier communication device 44a injected into the communication line 46a. The frequency utilization efficiency of the communication line can be improved without interfering with the high frequency signals of the power line carrier communicator 44b injected into the line 46b.

[0032] Further, a modem signal conforming to a standard such as the communication standard ITU-TV. 29 is a low-frequency band signal, and therefore passes through a low-pass filter 47. As a result, communication by the power line carrier communication devices 44a and 44b and communication by a modem compliant with a communication standard such as ITU-TV.29 can be performed using the same communication lines 46a and 46b.

Industrial applicability

The power line carrier communication system according to the present invention can be used in the field of performing communication by superimposing a carrier wave on a power line such as a high-voltage distribution line or a low-voltage distribution line. Brief Description of Drawings

1] A configuration diagram showing a power line carrier communication system according to Embodiment 1 of the present invention.

FIG. 2 is a configuration diagram of a main part of the power line carrier communication system according to Embodiment 1 of the present invention.

FIG. 3 is a configuration diagram of a main part of a power line carrier communication system according to Embodiment 2 of the present invention.

FIG. 4 is a configuration diagram showing a configuration of a main part of a power line carrier communication system according to Embodiment 3 of the present invention.

FIG. 5 is a configuration diagram showing a configuration of a main part of a power line carrier communication system according to Embodiment 4 of the present invention.

圆 6] It is a configuration diagram showing a main part of a power line carrier communication system according to Embodiment 5 of the present invention.

FIG. 7 is a configuration diagram showing a configuration of a conventional power line carrier communication system.

Explanation of symbols

la ゝ lb ゝ lc ゝ Id high voltage distribution line

2a ゝ 2b ゝ 2c Transformer

3a, 3b ゝ 3c Low voltage distribution line

4a, 4b ゝ 4c ゝ 4d, 4e, 4f

6a, 6b ゝ 6c Power line carrier communication device

7a ゝ 7b ゝ 7c ゝ 7d, 7e, 7f Power line carrier communicator in customer's house

8a ゝ 8b ゝ 8c ゝ 8d, 8e, 8f Communication terminal equipment

9 Upper network

10a, 10b, 10c substation

l la, l ib, 11c switchgear

12a, 12b, 12c communication device

13a, 13b, 13c Communication line

14 Control Center

15 Communication device Remote monitoring control panel

a, 17b High voltage distribution line coupler

a, 18b Low voltage distribution line coupler

a, 19b, 19c Low voltage distribution line coupler

1a, 181b capacitor

2 coupling transformer

0a, 130b, 130c Communication line

0a, 180b, 180c, 180d Low voltage distribution line couplers a, 61b, 61c Power line carrier communication equipment

bl, 18b2 Ferai core

substation

a, 44b Power line carrier communication device

a, 45b Low voltage distribution line coupler

Low pass filter

Claims

The scope of the claims

[1] A carrier wave is superimposed on the high-voltage distribution line and Z or the low-voltage distribution line that supplies power to the customer's house by reducing the voltage supplied from the high-voltage distribution line. Control system for opening and closing the electrical connection between the low voltage distribution line and the high voltage distribution line. A power line carrier communicator is coupled to a communication line provided for use via a coupler for low-voltage distribution lines, and between the communication terminal devices or the communication terminal device via the communication line and the power line carrier communicator. A power line carrier communication system designed to communicate with a higher level network.

[2] The power line carrier communication system according to claim 1, wherein a plurality of power line carrier communication devices communicate with each other in a differential mode.

[3] The power line carrier communication system according to claim 1, wherein a plurality of the power line carrier communication devices communicate with each other in a common mode.

[4] The communication terminal device and the plurality of communication terminal devices communicate with each other via the plurality of communication lines provided in different power distribution systems. This power line carrier communication system.

5. The power line carrier communication system according to claim 1, wherein the coupler is configured using a ferrite core.

6. The power line carrier communication system according to claim 1, wherein a low-pass filter is inserted into the communication line.