JP2010028296A - Plc bridge device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that troublesome work for confirming even a distribution panel connected to a different-phase power line is required in order to specify a different-phase outlet in a PLC bridge device whose power plug is inserted into the outlet connected to the power line in anti-phase relation. <P>SOLUTION: One of power plugs of the PLC bridge device is used as a power plug of 200V between two voltage lines in different-phase (opposite phases), the other of the power plugs is used as a power plug of 100V to be inserted into a normal commercial power source outlet connected between one voltage line and a neutral line, and the power plugs of 200V and 100V are connected to a coupling transformer via a high pass capacitor to facilitate improvement of transmission performance of a power line conveyance signal between a plurality of PLC devices to be connected to the power lines in anti-phase relation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power line communication technique for transmitting data using a power line, and a PLC that improves transmission performance between PLC (Power Line Communications) devices connected between different phases in a single-phase three-wire system. The present invention relates to a bridge device.

In data transmission between different phases of power line communication, a factor that causes a decrease in data transmission speed is that a large amount of attenuation occurs in the PLC modulation signal when straddling different phases of the power line. As a method for preventing this attenuation, Patent Document 1 discloses a method of bridging power lines W1 and W2 of different phases of a single-phase three-wire system so that power line carrier signals can be combined.
Also, using a 100V commercial power outlet (a power outlet connected between one voltage line and a neutral line (a commercial power outlet generally supplying 100V in Japan)) is in a different phase relationship. Products that connect outlets to bridge power line carrier signals are commercially available.
JP 2002-223183 A

  However, in the invention of Patent Document 1 and a commercially available product, when installing a PLC bridge device, an outlet connected to a power line in a different phase is specified, and the PLC bridge device is connected between outlets connected to a different phase power line. Although it is necessary to install it, in order to identify the outlet of the different phase, it is necessary to check the switchboard connected to the power line of the different phase, which is very troublesome.

  The problem of the present invention is that one of the power plugs of the PLC bridge device is a 200 V power plug between two voltage lines in different phases (opposite phases), and the other power plug is a voltage line and a neutral line. In order to improve the transmission performance of the power line carrier signal between the PLC devices connected to the power lines of different phases, using a normal 100V commercial power outlet connected between them.

  The PLC bridge device of the present invention includes a single-phase three-wire neutral wire and a PLC device connected to one of the two voltage wires, the neutral wire, and the two voltage wires. A PLC bridge device that improves the transmission performance of a power line carrier signal between PLC devices connected to the other voltage line of the first voltage line, and is inserted into a first power outlet connected to the two voltage lines. Relay the power line carrier signal with a power plug, a second power plug inserted into one of the two voltage lines and a second power outlet connected to the neutral line A power line carrier signal passing filter that passes the power line carrier signal to the transformer, and the first power plug and the second power plug pass through the power line carrier signal pass filter. Connect to the transformer It is characterized in that is.

  According to the present invention, a power source of a single-phase three-wire system is used in power line carrier communication, and one power plug is inserted into a 200V power outlet and the other power plug is inserted into a 100V commercial power outlet. Thus, it is possible to easily perform bridge connection between different phases.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram for explaining the overall configuration when a PLC device is connected to a general household wiring and the PLC bridge device of the present invention is attached. Note that a breaker is actually connected to the switchboard, but it is omitted in this description for the sake of clarity.

  In FIG. 1, a switchboard 100 is a switchboard set by a single-phase three-wire system, and a voltage line 20-a and a voltage line 20-b with a voltage of 200 V are installed via a neutral line 10. Further, the power supply of 100V voltage between the voltage line 20-b and the neutral line 10 is L1 phase, and the power supply of 100V voltage between the voltage line 20-a and the neutral line 10 is L2 phase. The L1 phase and the L2 phase are opposite to each other.

  The 100V power outlet 200 is a power outlet having a voltage of 100V taken out from either one of the voltage lines 20 of the switchboard 100 and the neutral line 10. The 100V power outlet 200-a and the 100V power outlet 200-b have the same phase relationship, and the 100V power outlet 200-a or the 100V power outlet 200-b and the 100V power outlet 200-c have different phases (reverse phase). ). The 200V power outlet 300 is a power outlet of 200V voltage taken out from the voltage line 20-a and the voltage line 20-b of the switchboard 100.

  Here, power line communication in the case of a different phase relationship will be described. The voltage line 20 is connected by a single-phase transformer, and in power line carrier communication, when a plurality of PLC devices are connected between 100 V power outlets 200 having a different phase relationship, the single-phase transformer is used. Since the connection is made over a long distance, the transmission efficiency is deteriorated between the PLC device 400-a and the PLC device 400-c, or between the PLC device 400-b and the PLC device 400-c. There is a point.

  By attaching the PLC bridge device 600 of the present invention to the position between the 100V power outlet 200-c and the power outlet 300 in FIG. 1, the PLC device 400-a and the PLC device 400-c, and the PLC device are installed. The transmission efficiency is improved between 400-b and PLC device 400-c.

  In FIG. 1, even if the position of one 100V power outlet 200-c where the PLC bridge device 600 of the present invention is attached is changed to the position of a 100V power outlet 200-b or 100V power outlet 200-a. Similar effects can be obtained.

  Prior to the description of the PLC bridge device according to the present invention, the basic configuration of the conventional PLC bridge device shown in FIG. 7 will be described. In the conventional PLC bridge device 500 shown in FIG. 7, the coupling transformer 501 functions as a signal relay unit that passes the frequency band of the power line carrier signal. Via this coupling transformer 501, a power line carrier signal between power lines having a different phase relationship is relayed.

  The 100V high-pass capacitor 502 is a power line carrier pass filter that cuts off a low frequency commercial power supply (50 Hz or 60 Hz) and passes a high frequency power line carrier signal. The 100V power plug 503 is a power plug shaped to be inserted into the 100V power outlet 200 connected between the neutral line 10 and the voltage line 20-a or the voltage line 20-b. In the conventional PLC bridge device 500, terminals at both ends of a 100V power plug 503 are connected to a primary terminal of a coupling transformer 501 serving as a signal relay means via the 100V high-pass capacitor 502, and the other 100V power supply is connected. The plug 503 is connected via the 100V high-pass capacitor 502 to the secondary terminal of the coupling transformer 501 whose terminals at both ends are signal relay means.

  In the case of FIG. 7, when two 100V power plugs 503 of the PLC bridge device 500 are respectively connected to the 100V power outlet 200-e and the 100V power outlet 200-f which are in a different phase relationship, the power line carrier signal between the different phases The transmission performance of the power line carrier signal between the PLC devices is improved, but the two 100V power plugs 503 of the PLC bridge device 500 are in the same phase relationship with the 100V power outlet 200-d and the 100V power outlet. When each is connected to 200-e, the transmission performance of the power line carrier signal between the PLC devices connected to the different-phase power lines cannot be improved.

  FIG. 2 shows a basic block configuration of the PLC bridge device 600 according to the first embodiment of the present invention. 2 includes a coupling transformer 601, a 100V high-pass capacitor 602, a 200V high-pass capacitor 603, a 100V power plug 604, and a 200V power plug 605. 601-1 and 601-3 are primary terminals of the coupling transformer 601, 601-2 and 601-4 are secondary terminals of the coupling transformer 601, and 604-1 and 604-2 are terminals of the 100V power plug 604. , 605-1 and 605-2 indicate terminals of the 200V power plug 605.

  The coupling transformer 601 is a signal relay unit that passes the frequency band of the power line carrier signal. In addition, a power line carrier signal between power lines having a different phase relationship is relayed through this transformer.

  The 100V high-pass capacitor 602 is a power line carrier signal passing filter that cuts off a low frequency commercial power supply (50 Hz or 60 Hz) and passes a high frequency power line carrier signal. The 200V high-pass capacitor 603 is a power line carrier signal passing filter that cuts off a low-frequency commercial power supply (50 Hz or 60 Hz) and has a characteristic similar to that of the 100V high-pass capacitor 602 and passes a high-frequency power line carrier signal. is there.

  The 100 V power plug 604 is a power plug having a shape that can be connected to the neutral line 10 and the 100 V power outlet 200 connected to the voltage line 20-a or the voltage line 20-b. The 200V power plug 605 is a power plug having a shape that can be inserted into the 200V power outlet 300 and can be connected to the voltage line 20-a and the voltage line 20-b.

  The terminals 605-1 and 605-2 at both ends of the 200V power plug 605 are connected to the primary terminal 601-1 and the secondary terminal 601-2 of the coupling transformer 601 serving as a signal relay unit, respectively. A terminal 604-1 connected via a high-pass capacitor 603 and to be connected to the neutral line of the 100V power plug 604 is a primary side secondary terminal of the coupling transformer 601 serving as the signal relay means. The terminals 601-3 and 601-4 that are not connected to the 200 V power plug 605 are connected via the 100 V high-pass capacitor 602. The primary side terminal 601-3 and the secondary side terminal 601-4 of the coupling transformer 601 are connected.

  How the PLC bridge device 600 is connected to the single-phase three-wire power line through the respective outlets of the 100V power outlet 200 and the 200V power outlet 300 will be described. The connection when the PLC bridge device 600 is connected to the 200V power outlet 300 and the 100V power outlet 200-c connected to the L1 phase side will be described.

  The coupling transformer 601 is connected to the L1 phase side using one AC200V side cable and one AC100V side cable, and is connected to the L2 phase side using another AC200V side cable and one AC100V side cable. The PLC coupling transformer 601 relays the power line carrier communication signal between the L1 phase and the L2 phase.

A connection when the PLC bridge device 600 is connected to the 200 V power outlet 300 and the 100 V power outlet 200-b connected to the L2 phase side will be described.
The coupling transformer 601 is connected to the L1 phase side using one AC200V side cable and one AC100V side cable, and is connected to the L2 phase side using another AC200V side cable and one AC100V side cable. The coupling transformer 601 relays the power line carrier signal between the L1 phase and the L2 phase.

  That is, the person who installs this bridge can perform the construction without being aware of whether the 100V power plug 604 is connected to the L1 phase side or the L2 phase side. Then, the direction in which the 100V power plug 604 is inserted into the 100V power outlet 200 is adjusted so as to obtain the correct effect.

  In the PLC bridge device 600 according to the first embodiment, the effect may not be obtained correctly depending on the direction in which the 100V power plug 604 is inserted into the 100V power outlet 200, and the insertion direction of the 100V power plug 604 is changed to 2 for each installation work. Although it is used in a direction that makes it possible to measure the transmission speed of the PLC device section and achieve good performance, the work such as measurement of the transmission speed is not an easy task even if it is performed once at the time of installation.

  Next, as a second embodiment, a description will be given of a PLC bridge device having a function of automatically switching a connection error of a 100V power plug.

  FIG. 3 is a block configuration diagram of a PLC bridge device 600A having an automatic insertion direction switching function according to the second embodiment of the present invention.

  The PLC bridge device 600A is provided with a power line replacement switch 613 that replaces the connection of the AC 100V power plug 604. When the central control unit 608 determines that the connection is not correct, the power line replacement switch 613 automatically switches the connection. Replace. Reference numerals 601 to 605 are the same as those described in the basic block configuration diagram of the PLC bridge device 600 according to the first embodiment of the present invention in FIG.

  The voltage detector 606 determines whether or not it is connected to AC 100V, with or without voltage. The determination result of the voltage detector 606 is notified to the central control unit 608. The signal generator 610 generates a test signal having an arbitrary single frequency in response to an instruction from the central control unit 608, and passes the transmitted signal level to the central control unit 608. The inspection signal is applied to the voltage line 20 selected by the inspection signal application selection switch 612 via the inspection signal passing capacitor 611. This arbitrary single frequency is a frequency higher than the commercial power supply frequency 50 Hz and 60 Hz and lower than the power line carrier signal frequency band (several MHz or more).

  The level meter 607 operates as a level meter that receives the test signal output from the signal generator 610, measures the received level of the received test signal, measures the received level of the received test signal, and centralizes the measurement result. The control unit 608 is notified. When the central control unit 608 receives the determination result from the voltage detector 606, the central control unit 608 instructs the signal generator 610 to start transmitting the inspection signal. Further, the reception level of the inspection signal is received from the level meter 607 and compared with the transmission level of the signal generator 610, it is determined whether the connection is appropriate.

  The criteria for determining whether the connection is appropriate are as follows. When correctly wired, the level meter 607 is connected to either the voltage line 20-a or the voltage line 20-b. Since the inspection signal is applied to the voltage line 20 selected by the inspection signal application selection switch 612, when the voltage line 20 to which the level meter 607 is connected matches the voltage line 20 to which the inspection signal is applied, the inspection signal is output. The signal is input to the level meter 607 with almost no attenuation. When the wiring is not correctly performed, the level meter 607 is connected to the neutral wire 10. Since the inspection signal is applied to the voltage line 20 selected by the inspection signal application selection switch 612, the inspection signal is input to the level meter 607 with considerable attenuation.

  Therefore, when the inspection signal application selection switch 612 is switched and the inspection signals are applied in the order of the voltage line 20-a and the voltage line 20-b, the wiring is correctly performed when the reception level of the level meter exceeds a specified value in either case. Can be determined. On the other hand, in any case, when the reception level of the level meter is lower than the specified value, it can be determined that the wiring is not correctly performed.

If it is determined that the connection is not correct, the connection of the power line replacement switch 613 is replaced, and the inspection signal is applied again in the order of the voltage line 20-a and the voltage line 20-b to determine whether the connection is appropriate.
FIG. 4 shows a flowchart of connection status determination and connection replacement. In this flowchart, for example, this process is started when power is supplied to the PLC bridge device 600A and the central control unit 608 is initialized.

  In the flowchart of FIG. 4, first, power is supplied, the central control unit 608 is initialized, and this processing is started (S6001). Based on the output value of the voltage detector 606, the presence / absence of AC 100V is investigated (S6002), and the state where the 100V power plug 604 is connected to the 100V power outlet 200 is waited (S6003: none). When the output value of AC100V is present (S6003: present), the test signal application selection switch 612 is selected to the voltage line 20-a side (S6004), and the signal generator 610 is instructed to start transmitting the test signal (S6005). The reception level of the level meter 607 is checked (S6006). If the reception level exceeds a specified value (S6007: Y), it is determined that the connection is correct and the signal generator 610 is instructed to stop transmitting the inspection signal (S6008). , Get out of the flow.

  When the reception level falls below the specified value (S6007: N), the inspection signal application selection switch 612 is selected on the voltage line 20-b side (S6009). Then, the reception level of the level meter 607 is checked again (S6010). If the reception level exceeds the specified value (S6011: Y), it is determined that the connection is correct, and the signal generator 610 is instructed to stop the inspection signal transmission ( S6008), the flow is exited.

  When the reception level is (S6011: N), it is determined that the connection is not correct, and the power line replacement switch 613 is replaced in the opposite direction (S6012). Then, an instruction to stop the inspection signal transmission is given (S6008), and the flow is exited.

  FIG. 5 is a block diagram of a PLC bridge device 600B having an insertion direction automatic display function according to the third embodiment of the present invention. FIG. 5 shows a functional block configuration when a mechanism capable of detecting whether the insertion direction of the 100V power plug 604 is correct and displaying the detection result is taken in.

  In the PLC bridge device 600B of FIG. 5, the power line changeover switch 613 for changing the connection of the AC100V power plug is not provided in the PLC bridge device 600B, and the installer indicates that the connection is not correct. After confirming the above, the direction of the 100V power plug is changed by 180 °, and it waits for the investigation result to be displayed again, so that it is possible to confirm that the connection has been correctly changed by, for example, a green LED lighting display.

In FIG. 5, reference numeral 609 denotes an LED.
Reference numerals 601 to 605 are the same as those described in the basic block configuration diagram of the PLC bridge device 600 according to the first embodiment of the present invention in FIG. Further, reference numerals 606 to 608 and 610 to 612 are the same as those described in the block configuration diagram of the PLC bridge device 600A having the automatic insertion direction switching function according to the second embodiment of the present invention in FIG.

  The LED 609 is a light emitting diode that performs a display that allows visual determination of whether or not the insertion direction of the 100V power plug 604 is correct.

  The criteria for determining whether the connection is appropriate are as follows. When correctly wired, the level meter 607 is connected to either the voltage line 20-a or the voltage line 20-b. Since the inspection signal is applied to the voltage line 20 selected by the inspection signal application selection switch 612, when the voltage line 20 to which the level meter 607 is connected matches the voltage line 20 to which the inspection signal is applied, the inspection signal is output. The signal is input to the level meter 607 with almost no attenuation.

  When the wiring is not correctly performed, the level meter 607 is connected to the neutral wire 10. Since the inspection signal is applied to the voltage line 20 selected by the inspection signal application selection switch 612, the inspection signal is input to the level meter 607 with considerable attenuation.

  Therefore, when the inspection signal application selection switch 612 is switched and the inspection signals are sequentially applied to the voltage line 20-a and the voltage line 20-b, the wiring is correctly performed when the reception level of the level meter exceeds a specified value. Can be determined. On the other hand, in any case, when the reception level of the level meter is lower than the specified value, it can be determined that the wiring is not correctly performed.

  If it is determined that the connection is not correct, the LED 609 indicates that the connection is inappropriate, for example, blinks red, and prompts the installer to change the insertion direction of the 100V power plug 604.

  FIG. 6 is a diagram illustrating a basic configuration of a PLC bridge device 600C according to the fourth embodiment of the present invention. It is also possible to investigate the connection status with a simple circuit provided with a neon lamp (NL) as shown in FIG. This eliminates the need for a special block, so that the connection can be confirmed with a low-cost component structure, which has the effect of reducing costs.

In FIG. 6, reference numerals 614-a and 614-b denote neon lamps.
Reference numerals 601 to 605 are the same as those described in the basic block configuration diagram of the PLC bridge device 600 according to the first embodiment of the present invention in FIG.

  The state of connection according to the state of each neon lamp is shown below. When the neon lamp 614-a is lit and the neon lamp 614-b is lit, it is determined that the 100V power plug 604 is inserted into the 100V power outlet 200 in the correct orientation and the connection is appropriate. When the neon lamp 614-a is off and the neon lamp 614-b is lit, the connection is inappropriate, when the neon lamp 614-a is lit, when the neon lamp 614-b is off, the connection is inappropriate, and the neon lamp 614-a is When the light is turned off and the neon lamp 614-b is turned off, it can be seen that the connection is inappropriate.

1 is an overall configuration diagram of a PLC system between PLC devices connected to a PLC bridge device. It is a basic block block diagram of the PLC bridge apparatus of Example 1 of this invention. It is a block block diagram of the PLC bridge apparatus provided with the insertion direction automatic change function of Example 2 of this invention. It is a connection condition confirmation flowchart of the PLC bridge apparatus of Example 2 of this invention. It is a block block diagram of the PLC bridge apparatus provided with the insertion direction automatic display function of Example 3 of this invention. It is a basic block diagram of the PLC bridge apparatus of Example 4 of this invention. It is a figure which shows the conventional PLC bridge | bridging apparatus.

Explanation of symbols

10 Power line (neutral line)
20-a power line (voltage line)
20-b Power line (voltage line)
100 Single-phase three-wire distribution board 200 100 V power outlet 300 200 V power outlet 400 PLC device 500 Conventional PLC bridge device 501 Coupling transformer 502 High pass capacitor for 100 V 503 100 V power plug 600 PLC bridge device 600 A PLC bridge device of Example 2 600B PLC Bridge Device of Example 3 600C PLC Bridge Device of Example 4 601 Coupling Transformer 601-1 Primary Side Terminal 601-2 Secondary Side Terminal 601-3 Primary Side Terminal 601-4 Secondary Side Terminal 602 100V High Pass Capacitor 603 200V High Pass Capacitor 604 100V Power Plug 604-1 Terminal 604-2 Terminal 605 200V Power Plug 605-1 Terminal 605-2 Terminal 606 Voltage Detection Vessel 607 level meter 608 central control unit 609 LED
610 Signal generator 611 Inspection signal passing capacitor 612 Inspection signal application selection switch 613 Power line changeover switch 614 Neon lamp

Claims (4)

A PLC device connected to a single-phase three-wire neutral wire and one of the two voltage wires, and the neutral wire and the other voltage wire of the two voltage wires. A PLC bridge device for improving the transmission performance of the power line carrier signal between the PLC devices,
A first power plug inserted into a first power outlet connected to the two voltage lines;
A second power plug inserted into one of the two voltage lines and a second power outlet connected to the neutral line;
A transformer that relays the power line carrier signal;
A power line carrier signal passing filter that passes the power line carrier signal to the transformer;
The PLC bridge device, wherein the first power plug and the second power plug are connected to the transformer via the power line carrier signal passing filter. The PLC bridge device according to claim 1,
Two terminals of the first power plug are respectively connected to one terminal on the primary side and one terminal on the secondary side of the transformer via the power line carrier signal passing filter,
One terminal of the second power plug means to be connected to a neutral wire inserted into the second power outlet and connected to the second power outlet is the first power plug of the transformer. A PLC bridge device, characterized in that it is connected to a primary side terminal and a secondary side terminal not connected to the means via the power line carrier signal passing filter. The PLC bridge device according to claim 1 or 2,
The second power plug includes a neutral wire detecting means for detecting whether one predetermined terminal is connected to the neutral wire;
Warning means, and
A PLC bridge device that warns by the warning means when the predetermined one terminal is not connected to the neutral line by the neutral wire detecting means. The PLC bridge device according to claim 1 or 2,
The second power plug is a neutral wire detecting means for detecting whether one terminal to be connected to the neutral wire is connected to the neutral wire;
Polarity switching means for switching the connection relationship between the two terminals of the second power outlet and the transformer terminal of the signal relay means;
The PLC bridge characterized in that, when one terminal to be connected to the neutral wire is not connected to the neutral wire by the neutral wire detecting means, the connection relation is changed by the polarity changing means. apparatus.

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