JP4221453B1 - Wiring construction method and connection device for power line communication - Google Patents

Abstract

An additional installation work of a signal superimposing / separating apparatus when a PLC slave modem is changed or added is made unnecessary.
SOLUTION: Between a load side and a main line side of a child breaker 121 electrically connected to a neutral line main line 80 (90) and an L1 main line 81 (91) connected to a load side of a main breaker 20. The signal superposition / separation devices 140 and 141 that cut off the commercial AC power supply frequency and selectively transmit the high-frequency signal including the PLC signal are connected between the neutral line main line 80 and the neutral line branch line 93 on the load side of the child breaker 121. In addition, the L1 line main line 81 and the L1 line branch line 94 on the load side of the child breaker 121 are connected so as to bypass the child breaker 121 and transmit the PLC signal. Further, a signal superimposing / separating apparatus that cuts off the commercial AC power supply frequency and selectively transmits a high-frequency signal including a PLC signal between the L1 line main line 81 or the L1 line branch line 94 and the other of the L2 line main line 82 (92). 143 is connected.
[Selection] Figure 1

Description

  The present invention relates to power line communication (PLC), and in particular, a single-phase three-wire main line including a neutral line main line and two voltage line main lines connected to a load side of a main breaker included in a distribution board. The present invention relates to a wiring work method and a connecting device for superimposing a PLC signal without using a breaker.

  The PLC is a technology for performing data communication by superimposing a carrier wave on a power line (distribution line) laid to supply AC power such as AC100V and AC200V. In recent years, high-speed PLCs that enable high-speed data communication using a high frequency band of 2 to 30 MHz have been put into practical use.

  In Japan, sales of PLC modems that are connected to AC100V power outlets have been started. In such a PLC modem, power is supplied to the PLC modem by inserting a plug of a power cord connected to the PLC modem into an AC 100V power outlet provided in the house. At the same time, the PLC modem superimposes and outputs a high-frequency (for example, 2M to 30 MHz) communication signal (hereinafter referred to as a PLC signal) on the power cable. The PLC signal output from the PLC modem to the power cable propagates through the power line installed in the building via the power outlet and reaches another PLC modem connected to the other power outlet.

  A common power supply system for homes in Japan is a single-phase three-wire system. FIG. 4 is a distribution system diagram showing a state in which the PLC parent modem 10 and the child modems 11 to 13 are connected to a single-phase three-wire power line installed in a building. A total of three lead-in lines including one neutral line 70 and two voltage lines (L1 line 71 and L2 line 72) are connected to the distribution board 2. Three trunk cables, that is, the neutral trunk line 80, the L1 trunk line 81, and the L2 trunk line 82 are connected to the load side of the main breaker 21 connected to the three lead-in lines.

  The child breakers 22 and 23 are connected between the neutral line main line 80 and the L1 line main line 81 and the L1 phase wirings 31 and 32 branched from these and installed in the house, respectively. In addition, child breakers 24 and 25 are connected between the neutral line trunk line 80 and the L2 line trunk line 82 and the L2 phase wirings 33 and 34 that are branched from these and laid in the house.

  The power outlets 411 and 412 are provided in the L1-N line L1 phase wiring 31 in which the L1 line and the neutral line are paired. Further, the power outlet 421 is provided in the L1 phase wiring 32 which is “in-phase different system” from the L1 phase wiring 31.

  On the other hand, the power outlets 431 and 441 are an L2-N system in which an L2 line and a neutral line are paired, and the L2 phase wiring 33 or 34 of “different phase (and naturally different system)” from the L1 phase wiring 31. Is provided.

  In the example of FIG. 4, the parent modem 10 is connected to a power outlet 411 provided on the L1 phase wiring 31. The child modem 11 is connected to a power outlet 412 provided on the L1 phase wiring 31 of the “same homologous system” as viewed from the parent modem 11. For this reason, transmission / reception of PLC signals between the parent modem 10 and the child modem 11 can be performed without any problem.

  On the other hand, the child modem 12 is connected to a power outlet 421 provided in the L1 phase wiring 32 of “in-phase / different system” as viewed from the parent modem 10. Accordingly, the PLC signal transmitted from the parent modem 10 reaches the child modem 12 via the two child breakers 22 and 23. For this reason, the PLC signal is attenuated by the passage loss in the child breakers 22 and 23, and the communication quality is deteriorated as compared with the communication of the homologous system.

  Further, the child modem 13 is connected to a power outlet 441 provided on the “different phase” L2 phase wiring 34 as viewed from the parent modem 11. Therefore, in addition to the PLC signal transmitted from the parent modem 10 passing through the two child breakers 22 and 25, communication can be performed only by the neutral line. Therefore, the PLC signal that reaches the child modem 13 from the parent modem 10 is significantly attenuated, and it is substantially difficult to communicate between these devices.

  For this reason, a technique for improving communication quality between in-phase systems and between phases using a signal superposition / separation device for separating a PLC signal from a power line and superimposing a PLC signal on the power line is known. Signal superposition / separation devices for separating and superimposing PLC signals include contact type devices that use capacitors and high-pass filters for cutting direct current and commercial alternating current frequencies (50 Hz and 60 Hz), strong ferrites, etc. Non-contact couplers using a transformer having a magnetic core are known.

  5 to 7 show conventional wiring system diagrams in which communication quality between in-phase systems and between systems is improved by using the signal superimposing / separating device. In FIG. 5, the load side of the child breaker 22 to which the parent modem 10 is connected and the load side of the child breaker 23 are connected via a signal superposition / separation device 141. The load side of the child breaker 22 and the load side of the child breaker 25 are connected via a signal superposition / separation device 142. As a result, the PLC signal is transmitted between the same-phase different systems and between different phases via the signal superimposing / separating devices 141 and 142. The connection between the load sides of the two child breakers is performed using, for example, a non-contact type signal superposition / separation device (see, for example, Patent Document 1).

  FIG. 6 shows a connection example when the parent modem 10 is provided with a PLC signal transmission / reception terminal. In this case, the parent modem 10 may be connected to the load side of the child breaker 23 via the signal superposition / separation device 141, and the parent modem 10 may be connected to the load side of the child breaker 25 via the signal superposition / separation device 142.

Furthermore, FIG. 7 is an example of wiring in which a signal superposition / separation device 142 for improving communication quality between different phases is connected between the L1 main line 81 and the L2 main line 82 in the distribution board (for example, (See Patent Documents 2 and 3).
JP 2004-297249 A JP 2002-232332 A JP 2007-82124 A

  In the method of connecting the signal superposition / separation devices 141 and 142 shown in FIGS. 4 to 6, when the connection position of the child modems 11 to 13 is changed, or on the wiring different from the wiring to which the child modems 11 to 13 are connected. When a new child modem is additionally installed, additional work for newly installing a signal superimposing / separating device is required.

  In the connection method of the signal superposition / separation device 142 shown in FIG. 7, the PLC signal transmitted / received between different phases passes through two child breakers. For this reason, there is a problem that the communication quality deteriorates due to the attenuation of the PLC signal due to the passage loss of the child breaker.

  The present invention has been made in consideration of the above-described circumstances, and a wiring construction method capable of making unnecessary the additional installation work of the signal superimposing / separating device when the arrangement change or addition of the child modem is performed, and An object is to provide a connection device.

The connection device of the present invention superimposes a PLC signal from a PLC parent modem on a single-phase three-wire main line including a neutral line and two voltage line main lines connected to a load side of a main breaker provided in a distribution board. A neutral line connection terminal electrically connected to the neutral line main line, and a first voltage line connection terminal electrically connected to one of the two voltage line main lines A second voltage line connection terminal electrically connected to the other of the two voltage line main lines, a neutral line connection line having one end connected to the neutral line connection terminal, and the first voltage A first voltage line connecting line having one end connected to the line connecting terminal, a second voltage line connecting line having one end connected to the second voltage line connecting terminal, and the trunk line side being the neutral line connecting line and Electrically connected to the first voltage line connecting line and energizing between the main line side and the load side The cross-sectional possible first child breaker provided between the first neutral line branch connected to the load side of the said neutral line connection line first child breaker, interrupting the commercial AC power source frequency And a first signal superposition / separation device that bypasses the first child breaker and transmits a PLC signal between the neutral wire connection line and the first neutral wire branch line, Provided between the voltage line connecting line and the first voltage line branch line connected to the load side of the first child breaker, cuts off the commercial AC power frequency and bypasses the first child breaker. A second signal superimposing / separating device for transmitting a PLC signal between the first voltage line connecting line and the first voltage line branch line; and the first voltage line connecting line or the first voltage line branch line. And the second voltage line connecting line, and cutting off the commercial AC power frequency The third signal superimposing separation apparatus for transmitting PLC signals between said second voltage line connection line first voltage line connecting line or the first voltage line branch, the first in A first power outlet connected to the load side of the first child breaker by a sex line branch line and the first voltage line branch line, and a PLC parent modem for transmitting a PLC signal is connected by a power cord. The neutral line connection line, the first voltage line connection line, the second voltage line connection line, the first neutral line branch line, the first voltage line branch line, the first child breaker, A housing for accommodating the first signal superimposing / separating device, the second signal superimposing / separating device, the third signal superimposing / separating device, and the first power outlet, and the neutral wire connecting terminal, The first voltage line connection terminal and the second voltage line connection terminal A child is connected to the single-phase three-wire main line from the outside of the distribution board .

The wiring construction method of the present invention is a wiring construction method for connecting the connection device from the outside of the distribution board , wherein the neutral wire connection terminal, the first voltage line connection terminal, and the second voltage line. A connection terminal is connected to each trunk line of the single-phase three-wire system from the outside of the distribution board.

  The first to third signal superimposing / separating devices may each include a plurality of couplers. For example, the first signal superimposing / separating apparatus includes a non-contact type coupler that separates and superimposes a PLC signal from the neutral line connection line, and another non-contact type that performs separation and superimposition of a PLC signal from the neutral line branch line. You may provide the coupler and the wiring which connects between these two non-contact type couplers. Further, for example, the first signal superimposing / separating device includes a wiring connected to the neutral wire connecting line, a wiring connected to the neutral wire branch line, and a high-pass type provided between these two wirings. A band pass type frequency filter may be provided.

According to the onset bright described above, the single-phase three-wire trunk containing neutral trunk line and two voltage lines trunk connected to the load side of the main breaker panelboard has, the parent modem transmit It is possible to directly superimpose the PLC signal to be transmitted without using the child breaker. Further, the PLC signal propagating through the main line can be separated and directly received by the parent modem without using the child breaker. For this reason, even if it is a case where a child modem is connected on which branch line, a PLC signal can be transmitted / received between a parent modem and a child modem only through one child breaker at most. That is, it is not necessary to add a signal superimposing / separating apparatus, which has been necessary in the past with the new installation of the slave modem or the change of the connection position.

Further, the use of the connection device of the present invention described above, the electrical work for electrically connecting the connection device to the distribution panel, ready for use a power line as a communication line for the PLC is completed. That is, it is not necessary to perform an advanced operation of connecting the signal superimposing / separating device inside and outside the distribution board.

  Also, in the conventional construction method of connecting the signal superimposing / separating device inside and outside the distribution board, obtain the distribution board drawing and distribution system diagram, and sufficiently connect the wiring (branch line) to which the parent and child modems are connected. If you don't know it, you can't work on it. On the other hand, if the connection device according to the second aspect of the present invention is used, the parent modem can be directly connected to the single-phase three-wire main line. Therefore, detailed investigation of the power distribution system is unnecessary, and the amount of work required for wiring work for performing PLC can be reduced.

  According to the present invention, it is possible to provide a wiring work method and a connection device that can eliminate the additional installation work of the signal superimposing / separating device when the child modem is changed or added.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted as necessary for the sake of clarity.

<Embodiment 1 of the Invention>
FIG. 1 is a wiring system diagram illustrating a basic configuration of the connection device 1 according to the present embodiment and a connection example of the connection device 1 to a single-phase three-wire power line. The connection device 1 includes a neutral wire connection terminal 110, an L1 line connection terminal 111, and an L2 line connection terminal 112. By connecting these three connection terminals to the neutral wire connection terminal 50, the L1 line connection terminal 51, and the L2 line connection terminal 52 provided on the distribution board 2, the connection device 1 is connected to the neutral line main line 80. , L1 main line 81 and L2 main line 82 are electrically connected. The neutral line connection terminal 50, the L1 line connection terminal 51, and the L2 line connection terminal 52 may be newly provided in the distribution board 2 for the connection device 1. For example, the neutral line main line 80, the L1 line main line The existing terminal group for connecting the 81 and L2 main line 82 to the main breaker 21 may also be used.

  The neutral line connection line 90, the L1 line connection line 91, and the L2 line connection line 92 are connected to the neutral line connection terminal 110, the L1 line connection terminal 111, and the L2 line connection terminal 112, respectively.

  The child breaker 121 is connected to the neutral line connection line 90 and the L1 line connection line 91. On the load side of the child breaker 121, a neutral line branch line 93 and an L1 line branch line 94 branched from the neutral line connection line 90 and the L1 line connection line 91, and a power outlet 131 are provided.

  Similarly, the child breaker 122 is connected to the neutral line connection line 90 and the L2 line connection line 92. On the load side of the child breaker 122, a neutral line branch line 95 and an L2 line branch line 96 branched from the neutral line connection line 90 and the L2 line connection line 92, and a power outlet 132 are provided.

  In the example of FIG. 1, the PLC parent modem 10 is connected to the power outlet 131. The parent modem 10 operates by supplying power from the power outlet 131 and transmits and receives PLC signals via the power outlet 131.

  On the other hand, the power outlet 132 may be used to supply power to other communication devices that are communicably connected to the parent modem 10. In the configuration example of FIG. 1, a router 61 connected to an upper network 62 such as the Internet is connected to a power outlet 132. The router 61 operates by supplying power from the power outlet 132. In the configuration example of FIG. 1, the router 61 and the parent modem 10 are connected via a twisted pair cable 60 so that they can communicate with each other. In order to prevent the power supply noise from the router 61 from being superimposed on the power line, the power supply outlet 132 may include a low-pass filter that cuts off the PLC signal band.

  The signal superimposing / separating devices 141 to 143 are high-pass or band-pass signal superimposing / separating devices that block direct current and commercial alternating current frequencies (50 Hz and 60 Hz) and transmit the PLC signal band.

  The signal superimposing / separating device 141 is connected between the main line side and the load side of the child breaker 121, that is, between the neutral wire connection line 90 and the neutral line branch line 93, and bypasses the child breaker 121 and transmits the PLC signal. . Similarly, the signal superimposing / separating device 142 is connected between the L1 line connecting line 91 and the L1 line branch line 94, and transmits the PLC signal bypassing the child breaker 121. The signal superposition / separation device 143 is connected between the L1 line connection line 91 and the L2 line connection line 92.

  By using the connection device 1 described above, the parent modem is connected to the single-phase three-wire trunk line group connected to the load side of the main breaker 21, that is, the neutral trunk line 80, the L1 trunk line 81, and the L2 trunk line 82. The PLC signal transmitted by 10 can be directly superimposed without passing through the child breaker 121. Also, the PLC signal propagating through the neutral trunk line 80, the L1 trunk line 81, and the L2 trunk line 82 can be separated and directly received by the parent modem 10 without passing through the child breaker 121. Therefore, regardless of which power outlet of the wirings 31 to 34 is connected to the child modems 11 to 13, the parent modem 10 and the child modems 11 to 11 are only passed through one of the child breakers 22 to 25. The PLC signal can be transmitted to and received from 13. For this reason, it is not necessary to add a signal superimposing / separating apparatus, which has been conventionally required when a new modem is newly installed or a connection position is changed.

  Further, by using the connection device 1, the preparation for using the power line as a communication line for the PLC is completed only by electrical work for electrically connecting the connection device 1 to the distribution board 2. That is, it is not necessary to perform an advanced operation of connecting the signal superimposing / separating device inside and outside the distribution board 2.

  Further, in the conventional construction method for connecting the signal superimposing / separating device to the inside and outside of the distribution board 2, the drawing of the distribution board 2 and the distribution system diagram are obtained, and the wiring in which the parent modem 10 and the child modems 11 to 13 are connected. If you do not know enough, you can not work. On the other hand, if the connection device 1 is used, the parent modem can be directly connected to the single-phase three-wire main line. Therefore, detailed investigation of the power distribution system is unnecessary, and the amount of work required for wiring work for performing PLC can be reduced.

  Of course, the configuration of the connection device 1 shown in FIG. 1 is merely an example. For example, in FIG. 1, the power outlets 131 and 132 are allocated to the L1-N system and the L2-N system. However, both of these two power outlets may be provided in either the L1-N system or the L2-N system.

  In FIG. 1, the signal superimposing / separating device 143 is connected between the L1 line connecting line 91 and the L2 line connecting line 92, but this is connected between the L1 line supporting line 94 and the L2 line connecting line 92. Also good.

  The connection device 1 according to the present embodiment has a housing 100 as shown in FIGS. 2A and 2B, and in the housing 100, child breakers 121 and 122, power outlets 131 and 132, and The signal superimposing / separating devices 141 to 143 may be accommodated. In the configuration example shown in FIGS. 2A and 2B, the casing 100 includes an outer door 101 provided with a window 102 for monitoring the LED lighting state of the parent modem 10 and the like mounted inside, and an outer door 101. A middle door 103 provided further inside the door 101 is provided.

  The storage chamber 104 is a space inside the housing 100 that can be accessed from the outside by opening the outer door 101. In the accommodation room 104, the parent modem 10 and other communication devices (for example, the router 61) connected thereto are placed.

  In the configuration example shown in FIGS. 2A and 2B, the child breakers 121 and 122 can be operated from the outside of the inner door 103. On the other hand, the power outlets 131 and 132, and the neutral wire connection terminal 100, the L1 wire connection terminal 111, and the L2 wire connection terminal 112 are isolated by the middle door 103 by closing the middle door 103 in order to prevent erroneous operation. It is provided inside the housing 100.

  The components of the connection device 1 are accommodated in the casing 100, and the electrical connection between the components is completed in advance, so that construction for performing the PLC is performed on the trunk group of the connection device 1 (neutral line trunk line 80). , L1 main line 81 and L2 main line 82) can be quickly completed. In addition, since the signal superimposing / separating devices 141 to 143 are accommodated in the casing 100, the signal superimposing / separating devices 141 to 143 are compared with a construction method in which the signal superimposing / separating devices 141 to 143 are directly attached to the distribution board 2. Can reduce the risk of accidental removal.

<Embodiment 2 of the Invention>
In the present embodiment, a construction method for connecting the signal superimposing / separating devices 141 to 143 in the distribution board 2 without using the connecting device 1 will be described. FIG. 3 is a distribution system diagram showing a connection example of the signal superposition / separation devices 141 to 143 by the construction method according to the present embodiment.

  In FIG. 3, the signal superposition / separation devices 141 and 142 are connected between the load side and the main line side of the child breaker 22 and transmit the PLC signal bypassing the child breaker 22. The signal superposition / separation device 143 is connected between the L1 main line 81 and the L2 main line 82.

  3, the PLC breaker 22 transmits the PLC signal transmitted from the parent modem 10 to the neutral trunk line 80, the L1 trunk line 81, and the L2 trunk line 82 connected to the load side of the main breaker 21. It can be directly superimposed without intervention. Further, the PLC signal propagating through the neutral trunk line 80, the L1 trunk line 81, and the L2 trunk line 82 can be separated and directly received by the parent modem 10 without passing through the child breaker 22.

  Furthermore, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention described above.

It is a figure which shows the structure of the connection apparatus concerning Embodiment 1 of this invention. 1 is an external view of a connection device according to a first embodiment of the present invention. It is a figure which shows the power line wiring system obtained by the wiring construction method concerning Embodiment 2 of this invention. It is a conventional wiring system diagram for using a single-phase three-wire power line as a communication line. It is a conventional wiring system diagram for using a single-phase three-wire power line as a communication line. It is a conventional wiring system diagram for using a single-phase three-wire power line as a communication line. It is a conventional wiring system diagram for using a single-phase three-wire power line as a communication line.

Explanation of symbols

1 connection device 2 distribution board 10 parent modem 11-13 child modem 21 main breaker 22-25 child breaker 31, 32 L1 phase wiring 33, 34 L2 phase wiring 50 neutral line connection terminal 51 L1 line connection terminal 52 L2 line connection Terminal 60 Twisted pair cable 61 Router 62 Host network 70 Neutral wire (lead-in wire)
71 L1 line (lead wire)
72 L2 line (lead wire)
80 Neutral Line 81 L1 Line Main Line 82 L2 Line Main Line 90 Neutral Line Connection Line 91 L1 Line Connection Line 92 L2 Line Connection Line 93 Neutral Line Branch Line 94 L1 Line Branch Line 95 Neutral Line Branch Line 96 L2 Line Branch Line 100 Housing DESCRIPTION OF SYMBOLS 101 Outer door 102 Window 103 Middle door 104 Accommodating chamber 110 Neutral wire connection terminal 111 L1 line connection terminal 112 L2 line connection terminal 121, 122 Child breaker 131, 132 Power supply outlet 141-143 Signal superimposition separation device 411, 412, 421, 431, 441 Power outlet

Claims (7)

A connection device for superimposing a PLC signal from a PLC parent modem on a single-phase three-wire main line including a neutral line main line and two voltage line main lines connected to a load side of a main breaker provided in a distribution board. And
A neutral line connection terminal electrically connected to the neutral line main line, a first voltage line connection terminal electrically connected to one of the two voltage line main lines, and the two voltage line main lines. A second voltage line connecting terminal electrically connected to the other;
A neutral wire connection line having one end connected to the neutral wire connection terminal, a first voltage line connection line having one end connected to the first voltage line connection terminal, and the second voltage line connection terminal A second voltage line connecting line having one end connected to
A first child breaker that is electrically connected to the neutral line connection line and the first voltage line connection line on the main line side and capable of interrupting energization between the main line side and the load side;
Provided between the first neutral line branch connected to the load side of the said neutral line connection line first child breaker, thereby interrupting the commercial AC power source frequency, said first child breaker A first signal superimposing / separating device for detouring and transmitting a PLC signal between the neutral line connecting line and the first neutral line branch line; the first voltage line connecting line; and the first child Provided between the first voltage line branch line connected to the load side of the breaker, cuts off the commercial AC power frequency, bypasses the first child breaker, and the first voltage line connection line and the A second signal superimposing / separating device for transmitting a PLC signal to / from the first voltage line branch line;
Provided between the first voltage line connection line or the first voltage line branch line and the second voltage line connection line, and cuts off the commercial AC power frequency, and the second voltage line connection line A third signal superimposing / separating device for transmitting a PLC signal between the first voltage line connecting line or the first voltage line branch line;
The first neutral line branch line and the first voltage line branch line are connected to the load side of the first child breaker, and a PLC parent modem that transmits a PLC signal is connected by a power cord. 1 power outlet,
The neutral line connection line, the first voltage line connection line, the second voltage line connection line, the first neutral line branch line, the first voltage line branch line, the first child breaker, the A first signal superimposing / separating device, the second signal superimposing / separating device, the third signal superimposing / separating device, and a housing that houses the first power outlet,
A connection device, wherein the neutral wire connection terminal, the first voltage line connection terminal, and the second voltage line connection terminal are connected to the single-phase three-wire main line from the outside of the distribution board . The connection device according to claim 1,
The housing has a housing room for housing the PLC parent modem . The connection device according to claim 1 or 2,
A connection apparatus comprising: a PLC parent modem connected to the first power outlet by a power cord and superimposing a PLC signal on the main line via the first power outlet . The connection device according to any one of claims 1 to 3,
A second child breaker capable of interrupting energization between the main line side and the load side electrically connected to the neutral line connection line and the second voltage line connection line;
And a second power outlet connected to the load side of the second child breaker by the connected second neutral feeder line and the second voltage line branch to the load side of the second child Breaker ,
The connection device, wherein the second child breaker, the second power outlet, the second neutral line branch line, and the second voltage line branch line are accommodated in the casing . The connection device according to claim 4 ,
A router for interconnecting a host network and the PLC parent modem is connected to the second power outlet by a power cord . In the connection device according to claim 4 or 5 ,
The connection device, wherein the second power outlet includes a noise filter that blocks power noise from a device connected to the second power outlet. A wiring construction method for connecting the connection device according to any one of claims 1 to 6 from the outside of the distribution board ,
The neutral wire connection terminal, the first voltage line connection terminal, and the second voltage line connection terminal are connected to the single-phase three-wire main lines from the outside of the distribution board.
Wiring construction method characterized by that .

Images