JP2006101468A - Method of superimposing power line communication signal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simultaneously superimpose power line communication signals on a large number of power lines from a terminal for power line communication by current drive. <P>SOLUTION: Indoor electric power lines Ra-Tc in several phases R, S and T distributed into several systems A, B and C, first ferrite cores 2a1-2c3, through which the indoor electric power lines Ra-Tc are individually passed and conductor wires 4r, 4s and 4t which are wound around the first ferrite cores 2a1-2c3, respectively at least once are provided. The several conductor wires 4r, 4s and 4t are wound around the several first ferrite cores 2a1-2c3, and both ends of the conductor wires 4r, 4s and 4t are connected to a modem of a power line communications device. Power line communication signals, output from the power line communication device 5, are superimposed on the indoor electric power lines Ra-Tc. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a power line communication signal superposition method for power lines having different phases.

  A conventional method of superimposing a power line communication signal on a three-phase three-wire power line will be described with reference to FIG. The terminal A is connected between the R-phase power line 10 and the S-phase power line 20, the terminal B is connected between the S-phase power line 20 and the T-phase power line 30, and the T-phase power line 30 and the R-phase power line 30 are connected. Terminal C is connected between the power line 10 and the power line 10.

  A coupling circuit 100 is connected between the R-phase power line 10, the S-phase power line 20, and the T-phase power line 30. The coupling circuit 100 includes a first capacitor C1, a second capacitor C2, and a transformer T that block low-frequency components. The transformer T includes a primary coil L1 and a secondary coil L2.

  That is, the R-phase power line 10 and the S-phase power line 20 are connected via a series circuit including the first capacitor C1 and the primary coil L1 of the transformer T, and the S-phase power line 20 and the T-phase power line 20 are connected to each other. The power line 30 is connected via a series circuit including a secondary coil L2 of the transformer T and a second capacitor C2. The T-phase power line 30 and the R-phase power line 10 are connected via a second capacitor C2, a transformer T, and a first capacitor C1.

  Accordingly, the terminal A connected between the R-phase power line 10 and the S-phase power line 20, the terminal B connected between the S-phase power line 20 and the T-phase power line 30, and the T-phase power line 30. And power line communication with the terminal C connected between the R-phase power line 10 (see, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 07-235897 (FIG. 1).

  In the above configuration, power line communication is possible between any two of the three-phase three-wire power lines by connecting a transformer between the power lines. However, since the communication terminal is directly coupled between the power lines, voltage driving is possible. Thus, if the impedances of the communication terminal and the power line are not matched, a sufficient signal cannot be superimposed on the power line.

  An object of the present invention is to superimpose a power line communication signal on a large number of power lines simultaneously by current driving from a power line communication terminal.

  In order to solve the above problems, a plurality of indoor distribution lines distributed to a plurality of systems, an annular first ferrite core into which each of the indoor distribution lines is individually inserted, and each of the first ferrite cores And conductor wires wound in the same direction at least once and connected in series with each other, and both ends of the conductor wires are connected to the input / output ends of the modem of the power line communication device.

  Moreover, the said conductor wire was mutually connected in series by the same phase between different distribution systems.

  In addition, the conductor wires connected in series in different phases were connected in parallel in different phases.

  Moreover, the said conductor wire was mutually connected in series by different phases in the same distribution system.

  The conductor wires connected in series in different distribution systems are connected in parallel in different distribution systems.

  Each distribution system is provided with a common neutral wire that is paired with the indoor distribution wires of each phase, and is provided with an annular second ferrite core through which the neutral wire is inserted. The conductor wire wound around one ferrite core is wound around the second ferrite core one or more times, and the winding direction around the first ferrite core and the winding direction around the second ferrite core Were reversed.

  In addition, the multi-phase indoor distribution lines and neutral wires distributed to a plurality of systems, the annular first ferrite cores into which the indoor distribution lines are individually inserted, and the neutral wires are inserted. An annular second ferrite core, and a conductor wire wound around the first ferrite core and the second ferrite core at least once, and the conductor wire is different in the same distribution system. Are connected in parallel to each other and connected in series to the second ferrite core, and the winding direction around the first ferrite core and the winding direction around the second ferrite core are mutually connected. On the other hand, both ends of the conductor wires connected in series and parallel were connected to the input / output ends of the modem of the power line communication device.

  Further, the conductor wires connected in series and parallel are connected in parallel to each other in the different distribution systems.

  According to the first aspect, the multi-phase indoor distribution lines distributed to the plurality of systems, the annular first ferrite cores into which the respective indoor distribution lines are individually inserted, and the first ferrite cores, respectively. It has conductor wires wound in the same direction at least once and connected in series with each other, and both ends of the conductor wires are connected to the input / output ends of the modem of the power line communication device. A power line communication signal can be superimposed. In addition, since the load on the modem is reduced, signals can be efficiently superimposed.

  According to the second aspect, since the conductor lines are connected in series with each other in the same phase between different distribution systems, the power line communication signal can be superimposed on the indoor distribution lines in the same layer of each system.

  According to the third aspect, since the conductor wires connected in series in different phases are connected in parallel in different phases, the power line communication signal can be superimposed on all the indoor distribution lines in each system.

  According to the fourth aspect, since the conductor lines are connected in series with different phases in the same distribution system, the power line communication signal can be superimposed for each system.

  According to claim 5, since the conductor wires connected in series in different distribution systems are connected in parallel in different distribution systems, the power line communication signal is superimposed on all the indoor distribution lines in each system. it can.

  Further, according to claim 6, each distribution system is provided with a common neutral wire that is paired with the indoor distribution wires of each phase, and the annular second ferrite core through which the neutral wire is inserted The conductor wire wound around the first ferrite core is wound around the second ferrite core one or more times, and the winding direction around the first ferrite core and the winding direction around the second ferrite core Are reversed from each other, so that the signal superimposition efficiency is improved and the balance of the indoor distribution line as the transmission line is improved, thereby reducing unnecessary radiation.

  Further, according to claim 7, a plurality of phases of indoor distribution lines and neutral wires distributed to a plurality of systems, an annular first ferrite core into which each indoor distribution line is individually inserted, and a neutral A ring-shaped second ferrite core into which the wire is inserted, and a conductor wire wound around each of the first ferrite core and the second ferrite core at least once, and the conductor wire in the same distribution system Different phases are connected in parallel to each other and connected in series to the second ferrite core, and the winding direction to the first ferrite core and the winding direction to the second ferrite core are opposite to each other. Since both ends of the conductor lines connected in series and parallel are connected to the input / output ends of the modem of the power line communication device, impedance matching with the modem can be obtained. In addition, the balance of the indoor distribution line is improved and unnecessary radiation is reduced.

  According to the eighth aspect of the present invention, since the conductor lines connected in series and parallel are connected in parallel with each other in different distribution systems, the power line communication signal can be superimposed on the indoor distribution lines of all systems.

  FIG. 1 shows a first embodiment of the present invention. The three-phase outdoor distribution lines R, S, and T are distributed to a plurality of systems (for example, three systems of A, B, and C) by the distribution board 1. The first distribution system A is connected to a three-phase indoor distribution line of Ra, Sa, Ta, and the second distribution system B is connected to a three-phase indoor distribution line of Rb, Sb, Tb, A three-phase indoor distribution line of Rc, Sc, and Tc is connected to the distribution system C. The indoor distribution lines Ra, Rb, and Rc are in phase (R phase), the indoor distribution lines Sa, Sb, and Sc are in phase (S phase), and the indoor distribution lines Ta, Tb, and Tc are in phase (T phase). From these indoor distribution lines Ra to Tc, for example, electric power is appropriately distributed and supplied to each home in the apartment.

  An annular ferrite core 2 through which each indoor distribution line Ra to Tc is inserted is provided at a position upstream of each indoor distribution line Ra to Tc, that is, a position close to the distribution board 1. As shown in FIG. 3, the ferrite core 2 is composed of two semi-circular two-part ferrite cores 2A and 2B, which are accommodated in resin cases 3A and 3B. By providing the locking means (not shown), the joint surfaces of the two-part ferrite cores 2A and 2B are matched, and each indoor distribution line Ra to Tc is in a ring shape with being connected to the distribution board 1. It is easy to pass through the ferrite core 2.

  As shown in FIG. 1, the indoor distribution line Ra of the first distribution system A is inserted into the first ferrite core 2a1, the indoor distribution line Sa is inserted into the first ferrite core 2a2, and the indoor distribution line Ta is connected. Insert the first ferrite core 2a3, the indoor distribution line Rb of the second distribution system B through the first ferrite core 2b1, the indoor distribution line Sb through the first ferrite core 2b2, and the indoor distribution line Tb. Is inserted into the first ferrite core 2b3, the indoor distribution line Rc of the third distribution system C is inserted into the first ferrite core 2c1, and the indoor distribution line Sc is inserted into the first ferrite core 2c2. Tc is inserted through the first ferrite core 2c3.

  Further, the conductor wire 4 is wound around the first ferrite cores 2a1 to 2c3 in the same direction at least once, but the conductor wire 4 is in a state in which the divided first ferrite cores 2A and 2B in FIG. By winding on one of them, winding is easy. In FIG. 1, the conductor wire 4 is inserted, but this state is one winding.

  And a common conductor wire is wound around each 1st ferrite core in which the in-phase indoor distribution line in each distribution system was inserted, respectively.

  That is, the first ferrite core 2a1 through which the indoor distribution line Ra of the first distribution system A is inserted, the first ferrite core 2b1 through which the indoor distribution line Rb of the second distribution system B is inserted, and the third distribution. A conductor wire 4r is wound in series around the first ferrite core 2c1 through which the indoor distribution line Rc of the system C is inserted, and the first ferrite core 2a2 through which the indoor distribution line Sa of the first distribution system A is inserted. And the first ferrite core 2b2 through which the indoor distribution line Sb of the second distribution system B is inserted and the first ferrite core 2c2 through which the indoor distribution line Sc of the third distribution system C is inserted have conductor wires 4s. A first ferrite core 2a3 wound in series and inserted through the indoor distribution line Ta of the first distribution system A, and a first ferrite core 2b3 inserted through the indoor distribution line Tb of the second distribution system B; Third distribution system C Conductor lines 4t is wound in series to the first ferrite core 2c3 which distribution line Tc is inserted. The conductor lines 4r, 4s, and 4t are connected in parallel, and both ends of the conductor lines 4 connected in parallel are connected to the input / output ends of the modem 5a of the power line communication device 5.

  And if a power line communication signal is output from the power line communication apparatus 5, the signal current will flow into each conductor line 4r, 4s, 4t, and the induced signal will flow into each indoor distribution line Ra-Tc. At this time, since each of the conductor wires 4r, 4s, and 4t is wound around the plurality of first ferrite cores, the impedance viewed from the modem 5a side is increased, and signals are efficiently transmitted to the indoor distribution lines Ra to Tc. Can be superimposed.

  Here, the other first ferrite core 7 is inserted into an arbitrary indoor distribution line (for example, Tc in FIG. 1), and the conductor wire 8 wound around the first ferrite core 7 is connected to the other power line communication device 6. Communication with the power line communication devices 5 and 6 becomes possible.

  FIG. 2 shows a second embodiment of the present invention. Here, the conductor wire 4a is wound around the first ferrite cores 2a1, 2a2, 2a3 into which the indoor distribution lines Ra, Sa, Ta in the first distribution system A are inserted, respectively, and the indoors in the second distribution system B The conductor wire 4b is wound around the first ferrite cores 2b1, 2b2, 2b3 through which the distribution lines Rb, Sb, Tb are respectively inserted, and the indoor distribution lines Rc, Sc, Tc in the third distribution system C are respectively inserted. The conductor wire 4c is wound around the first ferrite cores 2c1, 2c2, and 2c3.

  The conductor wires 4 a, 4 b, 4 c are connected in parallel, and both ends of the conductor wires 4 connected in parallel are connected to the modem 5 a of the power line communication device 5. And if a power line communication signal is output from the power line communication apparatus 5, the signal current will flow into each conductor line 4r, 4s, 4t, and the induced signal will flow into each indoor distribution line Ra-Tc.

  Further, if another ferrite core 7 is inserted into an arbitrary indoor distribution line (for example, Tc in FIG. 1), and the conductor wire 8 wound around the ferrite core 7 is connected to the modem 6 a of the other power line communication device 6. Communication between the power line communication devices 5 and 6 becomes possible.

  FIGS. 5 and 6 correspond to FIGS. 1 and 2, respectively, and show a configuration in the case where there is a neutral wire that is paired with a distribution line. The neutral wire is grounded at the power transmission end side and becomes a three-phase four-wire power transmission system. That is, the three-phase outdoor distribution lines R, S, and T and the neutral wires E that are paired with them are distributed to a plurality of distribution systems (for example, three systems of A, B, and C) by the distribution board 1. The first distribution system A is connected to a three-phase indoor distribution line of Ra, Sa, and Ta and a neutral wire Ea, and the second distribution system B is connected to a three-phase indoor distribution line of Rb, Sb and Tb. A neutral wire Eb is connected, and the third distribution system C is connected to a three-phase indoor distribution line of Rc, Sc, and Tc and a neutral wire Ec.

  The indoor distribution lines Ra, Rb, and Rc are in phase (R phase), the indoor distribution lines Sa, Sb, and Sc are in phase (S phase), and the indoor distribution lines Ta, Tb, and Tc are in phase (T phase). From these indoor distribution lines Ra to Tc, for example, electric power is appropriately distributed and supplied to each home in the apartment. Neutral wires Ea, Eb, and Ec are also supplied indoors. Then, for example, in an indoor room where the indoor distribution lines Ra, Sa, Ta and the neutral line Ea of the first distribution system are supplied, the distribution line Ra and the neutral line Ea supply power as a pair. That is, the neutral wires Ea, Eb, and Ec supply power in pairs with the distribution lines of the same distribution system A, B, and C, respectively.

  In FIG. 5, the neutral wire Ea in the first distribution system A is inserted through the second ferrite core 2a4, the neutral wire Eb in the second distribution system B is inserted through the second ferrite core 2b4, 3 of the distribution system C is inserted through the second ferrite core 2c4. A conductor wire 4e is wound around each second ferrite core 2a4, 2b4, 2c4. The winding direction is opposite to the winding direction around the first ferrite cores 2a1 to 2c3. The conductor line 4e is connected in parallel with the other conductor lines 4r, 4s, 4t. According to this configuration, since the power line communication signal is also induced in each of the neutral wires Ea, Eb, and Ec, the superimposing effect is improved. In addition, the balance of the indoor distribution line as the transmission line is improved, and unnecessary radiation from the indoor distribution line is reduced.

  Also in FIG. 6, the neutral wire Ea in the first distribution system A is inserted through the second ferrite core 2a4, the neutral wire Eb in the second distribution system B is inserted through the second ferrite core 2b4, 3 of the distribution system C is inserted through the second ferrite core 2c4. The conductor wires 4a, 4b, and 4ce are wound around the second ferrite cores 2a4, 2b4, and 2c4, respectively. The winding direction is opposite to the winding direction around the first ferrite cores 2a1 to 2c3. Also in this configuration, since the power line communication signal is induced on each of the neutral wires Ea, Eb, and Ec, the superimposing effect is improved. In addition, the balance of the indoor distribution line as the transmission line is improved, and unnecessary radiation from the indoor distribution line is reduced.

  FIG. 7 shows a third embodiment. In this configuration, the conductor wires wound around the first ferrite cores (2a1-2a3, 2b1-2b3, 2c1-2c3) provided in each distribution system in FIG. 6 are connected in parallel, The conductor wire wound around the ferrite core (2a4, 2b4, 2c4) is connected in series.

  That is, in FIG. 7, the conductor wire 4a used for the first distribution system A is wound around the first ferrite cores 2a1-2a3 in the same direction, and the wound conductor wires 4a are connected in parallel to each other. . The conductor wire 4a is also wound around the second ferrite core 2a4, but the winding direction is reversed, and is in series with the first ferrite cores 2a1-2a3.

  The conductor wire 4b used in the second distribution system B is wound around the first ferrite cores 2b1 to 2b3 in the same direction, and the wound conductor wires 4b are connected in parallel to each other. The conductor wire 4b is also wound around the second ferrite core 2b4, but the winding direction is reversed, and is in series with the first ferrite cores 2b1-2b3.

  Similarly, the conductor wire 4c used in the third distribution system C is wound around the first ferrite cores 2c1 to 2c3 in the same direction, and the wound conductor wires 4c are connected in parallel to each other. The conductor wire 4c is also wound around the second ferrite core 2c4, but the winding direction is reversed, and is in series with the first ferrite cores 2c1 to 2c3. Other configurations are the same as those in FIG.

  According to the configuration of FIG. 7, the conductor wire 4 connected to the modem 5a is parallel to the portion of the first ferrite core (2a1-2a3, 2b1-2b3, 2c1-2c3) wound around the second ferrite core. Since the part wound around (2a4, 2b4, 2c4) is in series, the impedance of the conductor wire 4 viewed from the input / output end of the modem 5a is the impedance of the conductor wire wound around one ferrite core. Since there is no significant change in comparison, impedance matching with the modem is easily obtained.

It is a wiring diagram which shows 1st Embodiment of the power line communication signal superimposition system of this invention. It is a connection diagram which shows 2nd Embodiment of the power line communication signal superimposition system of this invention. It is a structure figure of the ferrite core used for the power line communication signal superposition method of the present invention. It is a connection diagram which shows the conventional power line communication signal superposition system. It is a connection diagram which shows the other structure in 1st Embodiment of the power line communication signal superimposition system of this invention. It is a connection diagram which shows the other structure in 2nd Embodiment of the power line communication signal superimposition system of this invention. It is a connection diagram which shows the structure of 3rd Embodiment of the power line communication signal superimposition system of this invention.

Explanation of symbols

1: Distribution board 2, 7: Ferrite core 2A, 2B: Split ferrite core 3: Resin case 4, 8: Conductor wire 5, 6: Power line communication device 5a, 6a: Modem R, S, T: Outdoor distribution line Ra ~ Tc: Indoor distribution line

Claims (8)

A plurality of phases of indoor distribution lines distributed to a plurality of systems, an annular first ferrite core into which each of the indoor distribution lines is individually inserted, and each of the first ferrite cores once in the same direction. A power line communication signal superimposing method comprising: a conductor wire wound around and connected in series to each other; and both ends of the conductor wire connected to an input / output end of a modem of the power line communication device. The power line communication signal superposition method according to claim 1, wherein the conductor lines are connected in series with each other in the same phase between different distribution systems. 3. The power line communication signal superposition method according to claim 2, wherein the conductor wires connected in series in different phases are connected in parallel in different phases. The power line communication signal superposition method according to claim 1, wherein the conductor lines are connected in series at different phases in the same distribution system. 5. The power line communication signal superposition system according to claim 4, wherein the conductor lines connected in series in different distribution systems are connected in parallel in different distribution systems. Each distribution system is provided with a common neutral wire that is paired with the indoor distribution lines of each phase, and is provided with an annular second ferrite core through which the neutral wire is inserted, The conductor wire wound around the ferrite core is also wound around the second ferrite core one or more times, and the winding direction to the first ferrite core and the winding direction to the second ferrite core are determined. 6. The power line communication signal superposition method according to claim 1, wherein the power line communication signal superposition method is set to be opposite to each other. A plurality of phases of indoor distribution lines and neutral wires distributed to a plurality of systems, an annular first ferrite core into which each of the indoor distribution lines is individually inserted, and an annular configuration in which the neutral lines are inserted A second ferrite core, and a conductor wire wound around the first ferrite core and the second ferrite core at least once, and the conductor wires are arranged in different phases in the same distribution system. Connected in parallel to each other and connected in series to the second ferrite core, and the winding direction to the first ferrite core and the winding direction to the second ferrite core are opposite to each other. A power line communication signal superposition method, wherein both ends of the conductor lines connected in series and parallel are connected to the input / output ends of a modem of the power line communication apparatus. The power line communication signal superposition method according to claim 7, wherein the conductor lines connected in series and parallel are connected in parallel with each other in the different distribution systems.

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