WO2012005492A2 - Transformer bypass apparatus of time information broadcasting using power-line broadcasting - Google Patents

Transformer bypass apparatus of time information broadcasting using power-line broadcasting Download PDF

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Publication number
WO2012005492A2
WO2012005492A2 PCT/KR2011/004903 KR2011004903W WO2012005492A2 WO 2012005492 A2 WO2012005492 A2 WO 2012005492A2 KR 2011004903 W KR2011004903 W KR 2011004903W WO 2012005492 A2 WO2012005492 A2 WO 2012005492A2
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WO
WIPO (PCT)
Prior art keywords
time information
power line
signal
information broadcast
power
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Ceased
Application number
PCT/KR2011/004903
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French (fr)
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WO2012005492A3 (en
Inventor
Young Beom Kim
Sam Yong Woo
Myung Soo Kim
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Korea Research Institute of Standards and Science
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Korea Research Institute of Standards and Science
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Publication of WO2012005492A2 publication Critical patent/WO2012005492A2/en
Publication of WO2012005492A3 publication Critical patent/WO2012005492A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/76—Wired systems
    • H04H20/84—Wired systems combined with power distribution network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5416—Methods of transmitting or receiving signals via power distribution lines by adding signals to the wave form of the power source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5491—Systems for power line communications using filtering and bypassing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5495—Systems for power line communications having measurements and testing channel

Definitions

  • the present invention relates to an apparatus for detouring a time information broadcast signal around a transformer using a power line, and more specifically, to a time information broadcasting apparatus using a power line, in which the time information broadcast signal is overlapped with a power signal of 50 to 60 Hz and transferred to an electronic device or the like.
  • PLC power line communication
  • Broadcasting is a concept contrasting to the communication, and the broadcasting is distributing various types of information on entertainment, intelligence, education and the like so that the unspecified general public having an appropriate receive apparatus may simultaneously view or listen to the information.
  • the invention disclosed in the present invention uses a power line, like the power line communication.
  • a power line like the power line communication.
  • PLB power line broadcasting
  • the present invention relates to a time information broadcasting apparatus for loading and transmitting a time information broadcast signal on a power signal of the power line to a variety of devices, which can be defined as power line time broadcasting (PLTB).
  • PLTB power line time broadcasting
  • the power line broadcasting can perform long distance transmission using a power line based on a low frequency, and if uni-directional information transfer is the only object, the power line broadcasting can further effectively achieve the object compared with conventional power line communication.
  • the power line communication is a wired communication having a power line as a medium, it may affect other wireless facilities due to leakage of radio waves, and a frequency band for exchanging a large amount of data can be a frequency band limited by the radio regulation law in some cases.
  • the power line used for the power line communication is not a communication line comprising a single device for a single purpose like a telephone line or an asymmetric digital subscriber line (ADSL), but is connected to a variety of devices such as a refrigerator, a TV, and the like at home.
  • ADSL asymmetric digital subscriber line
  • time is a physical quantity that can be measured most accurately. Owing to its accuracy, time information is sufficiently valuable to be utilized in the whole field of industry, and it is important to manage and accurately maintain the time information for its utilization.
  • time information there are standard times of each country managed and maintained by a number of countries, in addition to the International Atomic Times (TAI) and Universal Time Coordinated (UTC).
  • TAI International Atomic Times
  • UTC Universal Time Coordinated
  • a reference time of an atomic clock mounted on a satellite of a global positioning system (GPS) is utilized as time information.
  • a UTCK program can be downloaded and used through the Internet, or time information can be obtained by connecting to a time server in each country using a modem.
  • time information can be obtained from long-wave broadcasting or shortwave broadcasting.
  • the long-wave or shortwave broadcasting loads and broadcasts information such as a one pulse per second(1PPS), a binary coded decimal (BCD) time code, an audio tone and the like on a carrier frequency.
  • 1PPS one pulse per second
  • BCD binary coded decimal
  • time information such as information on national standard time
  • Internet network or a telephone network there is a method of obtaining time information, such as information on national standard time, using an Internet network or a telephone network, and even the method is indirect or limited in providing time information to a variety of electronic products, facilities of a factory, measuring instruments in a laboratory or the like.
  • the present invention has been made in view of the above problems, and it is an object of the present invention to provide a time information broadcasting apparatus using a power line, in which a small amount of data can be uni-directionally broadcasted to a long distance over a power line using a carrier wave of a low frequency band, whereas power line communication needs a carrier wave of a high frequency band in order to bi-directionally transmit a large amount of data.
  • an apparatus for detouring a time information broadcast signal around a transformer using a power line comprising: the power line 100 for transmitting a power signal and the time information broadcast signal; the transformer 10 intervened between the power lines 100, for transforming voltage of the power line 100; a filter 20 connected at one end of the power line 100, for extracting the time information broadcast signal; an amplifier 30 for amplifying an output signal of the filter 20; and a coupling means 40 connected at the other end of the power line 100, for coupling an output signal of the amplifier 30 to the power signal of the power line 100 through electromagnetic inductive coupling.
  • an apparatus for detouring a time information broadcast signal around a transformer using a power line comprising: the power line 100 for transmitting a power signal and the time information broadcast signal; the transformer 10 intervened between the power lines 100, for transforming voltage; a long wave receiver 25 for receiving a wireless signal from one end of the power line 100 which transmits the power signal and the modulated time information broadcast signal, and outputting a demodulated signal; a modulation means35 for outputting a modulated signal based on an output signal of the long wave receiver 25; and a coupling means 40 connected at the other end of the power line 100, for coupling an output signal of the modulation means 35 to the power signal of the power line 100 through electromagnetic inductive coupling.
  • a receiver side can stably receive the time information broadcast signal.
  • FIG. 1 is a view showing the configuration of an apparatus for detouring a time information broadcast signal around a transformer using a power line according to a first embodiment of the present invention.
  • FIG. 2 is a view showing the configuration of an apparatus for detouring a time information broadcast signal around a transformer using a power line according to a second embodiment of the present invention.
  • FIG. 3 is a view showing a configuration further comprising a filter and an amplifier in a first embodiment of the present invention.
  • FIG. 4 a view showing a configuration further comprising a filter and an amplifier in a second embodiment of the present invention.
  • a time information broadcasting apparatus using a power line roughly comprises the power line 100, a transformer 10, a filter 20, an amplifier 30, and a coupling means 40.
  • the apparatus may further comprise a filter 501 and an amplifier 503 as shown in FIG. 3.
  • the power line 100 can transmit a time information broadcast signal on a low frequency signal.
  • a power signal of the power line 100 generally uses a frequency of 60 Hz, a frequency lower or higher than 60 Hz (e.g., 40 to 70 Hz) can be used.
  • the transformer 10 is a means for transforming high voltage of the power line 100 into low voltage that can be used at an ordinary home or a factory.
  • the transformer 10 changes the voltage through electromagnetic induction. If magnetic flux lines are increased or decreased according to the current flowing through a first coil of the transformer, a current is induced at the other coil referred to as a second coil, and the voltage is boosted or reduced.
  • the filter 20 is a means for extracting only a modulated time information broadcast signal among a power signal and the modulated time information broadcast signal coupled to the power line 100.
  • the filter 20 may be configured using a high-pass filter or a band-pass filter.
  • the filter 20 outputs the extracted time information broadcast signal to the amplifier 30.
  • the amplifier 30 is a means for receiving an output signal of the filter 20 and amplifying the modulated time information broadcast signal.
  • the coupling means 40 may couple the signal amplified by the amplifier 30 to the power signal of the power line 100 through electromagnetic inductive coupling.
  • the coupling means 40 may couple the amplified signal to each of three phases of the power line 100 so that time information can be received even when a single phase is used.
  • the time information broadcast signal or the time information includes at least one of year, month, day, hour, minute, and second, and it can be a signal encoded in a BCD time code based on the IRIG-H format.
  • the BCD time code format is a binary serial code of one minute interval, in which output duration time of a pulse wave signal corresponding to '0' is 200[ms], output duration time of a pulse wave signal corresponding to '1' is 500[ms], and output duration time of a pulse wave signal for recognizing a starting point is 800[ms]. It is apparent that time information can be encoded in a variety of formats other than the IRIG-H format described above.
  • 'dummy information' included in the BCD time code preferably transmits, if needed, a signal including information on the position coupled to the power line, leap second, daylight saving time, weather, disaster, and the like, together with time information such as second, minute and the like described above.
  • a Korean Electric Power Corporation's (KEPCO's) code can be inserted as the position information coupled to the power line, and the inserted KEPCO's code can be efficiently used for a smart grid.
  • the filter 501 is a means for extracting only a time information broadcast signal modulated to be higher than about 100 Hz among the power signal and the modulated time information broadcast signal coupled to the power line 100.
  • the filter 501 can be configured using a high-pass filter or a band-pass filter.
  • the filter 501 outputs the extracted time information broadcast signal to the amplifier 503.
  • the amplifier 503 is a means for receiving a signal from the filter 501 and amplifying the modulated time information broadcast signal, which is a means for amplifying a signal when output power of the power signal and the time information broadcast signal included in the power line 100 is low.
  • the amplifier 503 for amplifying the power signal and the time information broadcast signal may be additionally configured at an appropriate part of the power line 100 to improve the output of the signal.
  • a time information broadcasting apparatus using a power line roughly comprises a power line 100, a transformer 10, a long wave receiver 25, a modulation means 35, and a coupling means 40.
  • the time information broadcasting apparatus may further comprise a filter 501 and an amplifier 503 as shown in FIG. 4.
  • all but a method of wirelessly receiving a power signal and a time information broadcast signal are the same.
  • the long wave receiver 25 wirelessly receives radio waves from the power line 100.
  • the long wave receiver 25 may comprise an antenna 25A for receiving a wireless signal from the power line 100, an RF tuner 25B for selecting a time information broadcast signal based on a signal received from the antenna 25A, and a demodulation means 25C for demodulating an output signal of the RF tuner 25B.
  • the modulation means 35 is a means for modulating the time information broadcast signal into a specific carrier frequency in order to transmit the time information broadcast signal.
  • the time information broadcast signal is modulated using an amplitude modulation method as a modulation method of an embodiment, a modulation signal can be generated using a phase modulation method or a frequency modulation method.
  • the frequency modulated in the amplitude modulation method is a frequency of tens of KHz that is coupled to a signal of 60 Hz of the power line 100 through the coupling means 40.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

The present invention relates to a time information broadcasting apparatus using a power line and a method thereof, in which since power line broadcasting uni-directionally transmits a small amount of data such as time information, whereas power line communication needs a carrier wave of a high frequency band in order to bi-directionally transmit a large amount of data, a carrier wave of a low frequency band can be used, and thus long-range power line broadcasting can be easily performed.

Description

TRANSFORMER BYPASS APPARATUS OF TIME INFORMATION BROADCASTING USING POWER-LINE BROADCASTING
The present invention relates to an apparatus for detouring a time information broadcast signal around a transformer using a power line, and more specifically, to a time information broadcasting apparatus using a power line, in which the time information broadcast signal is overlapped with a power signal of 50 to 60 Hz and transferred to an electronic device or the like.
Communication is a terminology referring to all actions for transmitting and receiving or exchanging information such as symbols, sounds, images and the like between two or more points. Among the communications, power line communication (PLC) is a technique for loading and communicating voices and data on a power signal using a power line, which supplies power, as a medium.
Broadcasting is a concept contrasting to the communication, and the broadcasting is distributing various types of information on entertainment, intelligence, education and the like so that the unspecified general public having an appropriate receive apparatus may simultaneously view or listen to the information.
The invention disclosed in the present invention uses a power line, like the power line communication. However, it can be defined as power line broadcasting (PLB) in that a small amount of data is uni-directionally transmitted and the unspecified general public receives the data. Among these, the present invention relates to a time information broadcasting apparatus for loading and transmitting a time information broadcast signal on a power signal of the power line to a variety of devices, which can be defined as power line time broadcasting (PLTB).
Unlike the power line communication, the power line broadcasting can perform long distance transmission using a power line based on a low frequency, and if uni-directional information transfer is the only object, the power line broadcasting can further effectively achieve the object compared with conventional power line communication.
The concept and technique of the power line broadcasting described above need to be introduced due to the following characteristics that the power line communication has.
Since the power line communication is a wired communication having a power line as a medium, it may affect other wireless facilities due to leakage of radio waves, and a frequency band for exchanging a large amount of data can be a frequency band limited by the radio regulation law in some cases.
In addition, the power line used for the power line communication is not a communication line comprising a single device for a single purpose like a telephone line or an asymmetric digital subscriber line (ADSL), but is connected to a variety of devices such as a refrigerator, a TV, and the like at home.
Accordingly, since the noise level of a circuit is extremely high and signals are frequently distorted or disconnected, there is a limit in that the power line is inappropriate as a data communication line. Particularly, there are difficulties in that special environments, such as high load, interference, varying impedance, attenuation of signal, and the like, need to be overcome and data should be transferred using limited signal power.
<Necessities of time information broadcasting>
In modern life, time is a physical quantity that can be measured most accurately. Owing to its accuracy, time information is sufficiently valuable to be utilized in the whole field of industry, and it is important to manage and accurately maintain the time information for its utilization.
Among the types of time information, there are standard times of each country managed and maintained by a number of countries, in addition to the International Atomic Times (TAI) and Universal Time Coordinated (UTC). In addition, a reference time of an atomic clock mounted on a satellite of a global positioning system (GPS) is utilized as time information.
As a method for obtaining time information in the current stage, a UTCK program can be downloaded and used through the Internet, or time information can be obtained by connecting to a time server in each country using a modem. In addition, time information can be obtained from long-wave broadcasting or shortwave broadcasting.
The long-wave or shortwave broadcasting loads and broadcasts information such as a one pulse per second(1PPS), a binary coded decimal (BCD) time code, an audio tone and the like on a carrier frequency. However, since communication of the short-wave broadcasting mainly uses a space wave, it is difficult to receive the space wave indoors, and receive sensitivity is degraded depending on the state of the ionosphere and the installation location of a receive antenna.
Furthermore, there is a method of obtaining time information, such as information on national standard time, using an Internet network or a telephone network, and even the method is indirect or limited in providing time information to a variety of electronic products, facilities of a factory, measuring instruments in a laboratory or the like.
Accordingly, it is required to provide a technique for transmitting time information without separately installing dedicated wires, measuring power consumption from a meter in real-time while using previously installed electric facilities as are, executing home automation, and utilizing time information for an industrial site having various measuring instruments or system equipments, a home aide robot, a variety of electronic devices used in the army, and a situation where GPS signals cannot be directly received such as inside a vessel.
Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a time information broadcasting apparatus using a power line, in which a small amount of data can be uni-directionally broadcasted to a long distance over a power line using a carrier wave of a low frequency band, whereas power line communication needs a carrier wave of a high frequency band in order to bi-directionally transmit a large amount of data.
To accomplish the above object, according to one aspect of the present invention, there is provided an apparatus for detouring a time information broadcast signal around a transformer using a power line, the apparatus comprising: the power line 100 for transmitting a power signal and the time information broadcast signal; the transformer 10 intervened between the power lines 100, for transforming voltage of the power line 100; a filter 20 connected at one end of the power line 100, for extracting the time information broadcast signal; an amplifier 30 for amplifying an output signal of the filter 20; and a coupling means 40 connected at the other end of the power line 100, for coupling an output signal of the amplifier 30 to the power signal of the power line 100 through electromagnetic inductive coupling.
According to another aspect of the present invention, there is provided an apparatus for detouring a time information broadcast signal around a transformer using a power line, the apparatus comprising: the power line 100 for transmitting a power signal and the time information broadcast signal; the transformer 10 intervened between the power lines 100, for transforming voltage; a long wave receiver 25 for receiving a wireless signal from one end of the power line 100 which transmits the power signal and the modulated time information broadcast signal, and outputting a demodulated signal; a modulation means35 for outputting a modulated signal based on an output signal of the long wave receiver 25; and a coupling means 40 connected at the other end of the power line 100, for coupling an output signal of the modulation means 35 to the power signal of the power line 100 through electromagnetic inductive coupling.
According to a preferred embodiment of the present invention described above, since power line broadcasting uni-directionally transmits a small amount of data such as time information, long-range power line broadcasting can be easily performed using a carrier wave of a low frequency band.
Furthermore, since a time information broadcast signal is transmitted to detour around a transformer, a receiver side can stably receive the time information broadcast signal.
The above and other objects, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.
FIG. 1 is a view showing the configuration of an apparatus for detouring a time information broadcast signal around a transformer using a power line according to a first embodiment of the present invention.
FIG. 2 is a view showing the configuration of an apparatus for detouring a time information broadcast signal around a transformer using a power line according to a second embodiment of the present invention.
FIG. 3 is a view showing a configuration further comprising a filter and an amplifier in a first embodiment of the present invention.
FIG. 4 a view showing a configuration further comprising a filter and an amplifier in a second embodiment of the present invention.
The preferred embodiments of the present invention will be hereafter described in detail, with reference to the accompanying drawings. The present invention may, however, be embodied in different forms and should not be constructed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.
<Configuration of first embodiment>
As shown in FIG. 1, a time information broadcasting apparatus using a power line according to a first embodiment of the present invention roughly comprises the power line 100, a transformer 10, a filter 20, an amplifier 30, and a coupling means 40. In addition, the apparatus may further comprise a filter 501 and an amplifier 503 as shown in FIG. 3.
If a power plug is only connected to an outlet of the power line 100 according to a first embodiment of the present invention without an additional LAN cable or wireless communication device, the power line 100 can transmit a time information broadcast signal on a low frequency signal. Although an existing power line 100 for supplying power can be used as is, and a power signal of the power line 100 generally uses a frequency of 60 Hz, a frequency lower or higher than 60 Hz (e.g., 40 to 70 Hz) can be used.
The transformer 10 according to a first embodiment of the present invention is a means for transforming high voltage of the power line 100 into low voltage that can be used at an ordinary home or a factory. The transformer 10 changes the voltage through electromagnetic induction. If magnetic flux lines are increased or decreased according to the current flowing through a first coil of the transformer, a current is induced at the other coil referred to as a second coil, and the voltage is boosted or reduced.
The filter 20 according to a first embodiment of the present invention is a means for extracting only a modulated time information broadcast signal among a power signal and the modulated time information broadcast signal coupled to the power line 100. At this point, the filter 20 may be configured using a high-pass filter or a band-pass filter. The filter 20 outputs the extracted time information broadcast signal to the amplifier 30.
The amplifier 30 according a first embodiment of the present invention is a means for receiving an output signal of the filter 20 and amplifying the modulated time information broadcast signal.
The coupling means 40 according to a first embodiment of the present invention may couple the signal amplified by the amplifier 30 to the power signal of the power line 100 through electromagnetic inductive coupling. On the other hand, the coupling means 40 may couple the amplified signal to each of three phases of the power line 100 so that time information can be received even when a single phase is used.
At this point, the time information broadcast signal or the time information includes at least one of year, month, day, hour, minute, and second, and it can be a signal encoded in a BCD time code based on the IRIG-H format.
The BCD time code format is a binary serial code of one minute interval, in which output duration time of a pulse wave signal corresponding to '0' is 200[ms], output duration time of a pulse wave signal corresponding to '1' is 500[ms], and output duration time of a pulse wave signal for recognizing a starting point is 800[ms]. It is apparent that time information can be encoded in a variety of formats other than the IRIG-H format described above.
In addition, 'dummy information' included in the BCD time code preferably transmits, if needed, a signal including information on the position coupled to the power line, leap second, daylight saving time, weather, disaster, and the like, together with time information such as second, minute and the like described above. In this case, a Korean Electric Power Corporation's (KEPCO's) code can be inserted as the position information coupled to the power line, and the inserted KEPCO's code can be efficiently used for a smart grid.
The filter 501 according to a first embodiment of the present invention is a means for extracting only a time information broadcast signal modulated to be higher than about 100 Hz among the power signal and the modulated time information broadcast signal coupled to the power line 100. At this point, the filter 501 can be configured using a high-pass filter or a band-pass filter. The filter 501 outputs the extracted time information broadcast signal to the amplifier 503.
The amplifier 503 according a first embodiment of the present invention is a means for receiving a signal from the filter 501 and amplifying the modulated time information broadcast signal, which is a means for amplifying a signal when output power of the power signal and the time information broadcast signal included in the power line 100 is low.
In the case of using the power line, if a distance between a signal transmitted from the transmission apparatus (not shown)and a signal received at the receive apparatus (not shown) is long, output power of the signal can be lowered due to distortion of the signal, noises caused by interference, or the like. At this point, in order to transmit a signal of an appropriate output power to the receive apparatus, the amplifier 503 for amplifying the power signal and the time information broadcast signal may be additionally configured at an appropriate part of the power line 100 to improve the output of the signal.
<Configuration of second embodiment>
As shown in FIG. 2, a time information broadcasting apparatus using a power line according to a second embodiment of the present invention roughly comprises a power line 100, a transformer 10, a long wave receiver 25, a modulation means 35, and a coupling means 40. In addition, the time information broadcasting apparatus may further comprise a filter 501 and an amplifier 503 as shown in FIG. 4. Compared with FIGs. 1 and 3 of the first embodiment, all but a method of wirelessly receiving a power signal and a time information broadcast signal are the same.
The long wave receiver 25 according to a second embodiment of the present invention wirelessly receives radio waves from the power line 100. The long wave receiver 25 may comprise an antenna 25A for receiving a wireless signal from the power line 100, an RF tuner 25B for selecting a time information broadcast signal based on a signal received from the antenna 25A, and a demodulation means 25C for demodulating an output signal of the RF tuner 25B.
The modulation means 35 according to a second embodiment of the present invention is a means for modulating the time information broadcast signal into a specific carrier frequency in order to transmit the time information broadcast signal. Although the time information broadcast signal is modulated using an amplitude modulation method as a modulation method of an embodiment, a modulation signal can be generated using a phase modulation method or a frequency modulation method. The frequency modulated in the amplitude modulation method is a frequency of tens of KHz that is coupled to a signal of 60 Hz of the power line 100 through the coupling means 40.
While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention.
10: Transformer
20: Filter
25A: Antenna
25B: RF tuner
25C: Demodulation means
30: Amplifier
35: Modulation means
40: Coupling means
100: Power line
501: Filter
503: Amplifier

Claims (7)

  1. Detouring apparatus (1). An apparatus for detouring a time information broadcast signal around a transformer using a power line, the apparatus comprising: the power line 100 for transmitting a power signal and the time information broadcast signal; the transformer 10 intervened between the power lines 100, for transforming voltage of the power line 100; a filter 20 connected at one end of the power line 100, for extracting the time information broadcast signal; an amplifier 30 for amplifying an output signal of the filter 20; and a coupling means 40 connected at the other end of the power line 100, for coupling an output signal of the amplifier 30 to the power signal of the power line 100 through electromagnetic inductive coupling.
  2. The apparatus according to claim 1, further comprising: a filter 501 for extracting the time information broadcast signal; and an amplifier 503 for amplifying the time information broadcast signal passing through the filter 501.
  3. The apparatus according to claim 1, wherein the time information broadcast signal includes at least one of year, month, day, hour, minute, and second.
  4. Detouring apparatus (2). An apparatus for detouring a time information broadcast signal around a transformer using a power line, the apparatus comprising: the power line 100 for transmitting a power signal and the time information broadcast signal; the transformer 10 intervened between the power lines 100, for transforming voltage; a long wave receiver 25 for receiving a wireless signal from one end of the power line 100 which transmits the power signal and the modulated time information broadcast signal, and outputting a demodulated signal; a modulation means 35 for outputting a modulated signal based on an output signal of the long wave receiver 25; and a coupling means 40 connected at the other end of the power line 100, for coupling an output signal of the modulation means 35 to the power signal of the power line 100 through electromagnetic inductive coupling.
  5. The apparatus according to claim 4, wherein the long wave receiver 25 comprises: an antenna 25A for transmitting and receiving the wireless signal; an RF tuner 25B for selecting the time information broadcast signal based on a signal received from the antenna 25A; and a demodulation means 25C for demodulating the time information broadcast signal based on an output signal of the RF tuner 25B.
  6. The apparatus according to claim 4, further comprising: a filter 501 for extracting the time information broadcast signal; and an amplifier 503 for amplifying the time information broadcast signal passing through the filter 501.
  7. The apparatus according to claim 4, wherein the time information broadcast signal includes at least one of year, month, day, hour, minute, and second.
PCT/KR2011/004903 2010-07-06 2011-07-05 Transformer bypass apparatus of time information broadcasting using power-line broadcasting Ceased WO2012005492A2 (en)

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KR1020100064717A KR101121468B1 (en) 2010-07-06 2010-07-06 Visual information broadcasting system using power line
KR10-2010-0064717 2010-07-06

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WO2012005492A3 WO2012005492A3 (en) 2012-03-01

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US20120128080A1 (en) * 2009-08-06 2012-05-24 Sam Yong Woo Apparatus and method for transmitting and receiving time broadcasting information using power line
EP2869475A1 (en) * 2013-11-04 2015-05-06 LSIS Co., Ltd. Transformer for power line communication

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KR101719689B1 (en) * 2015-07-22 2017-03-24 한국표준과학연구원 Long wave broadcast station, consumer terminal and power rate management system

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KR20020049441A (en) * 2000-12-19 2002-06-26 엘지전자 주식회사 Cable Broadcasting System using Electric Power Line
JP2004150892A (en) * 2002-10-29 2004-05-27 Neikusu:Kk Time synchronization signal transmitting apparatus, time synchronization signal receiving apparatus, and time synchronization signal carrier system
JP2007101306A (en) * 2005-10-03 2007-04-19 Mitsubishi Electric Engineering Co Ltd Time synchronization system for plc

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US20120128080A1 (en) * 2009-08-06 2012-05-24 Sam Yong Woo Apparatus and method for transmitting and receiving time broadcasting information using power line
US8761270B2 (en) * 2009-08-06 2014-06-24 Korea Research Institute Of Standards And Science Apparatus and method for transmitting and receiving time broadcasting information using power line
EP2869475A1 (en) * 2013-11-04 2015-05-06 LSIS Co., Ltd. Transformer for power line communication
US9570232B2 (en) 2013-11-04 2017-02-14 Lsis Co., Ltd. Transformer for power line communication

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