WO2016027966A1 - Système de surveillance de défaillance et procédé de surveillance de défaillance pour ensemble câble optoélectronique - Google Patents

Système de surveillance de défaillance et procédé de surveillance de défaillance pour ensemble câble optoélectronique Download PDF

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Publication number
WO2016027966A1
WO2016027966A1 PCT/KR2015/005462 KR2015005462W WO2016027966A1 WO 2016027966 A1 WO2016027966 A1 WO 2016027966A1 KR 2015005462 W KR2015005462 W KR 2015005462W WO 2016027966 A1 WO2016027966 A1 WO 2016027966A1
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WIPO (PCT)
Prior art keywords
power line
failure
unit
optical fiber
line unit
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PCT/KR2015/005462
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English (en)
Korean (ko)
Inventor
박지상
박래혁
양은정
주형준
Original Assignee
엘에스전선 주식회사
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Priority claimed from KR1020140166223A external-priority patent/KR102244743B1/ko
Application filed by 엘에스전선 주식회사 filed Critical 엘에스전선 주식회사
Publication of WO2016027966A1 publication Critical patent/WO2016027966A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52—Outage or fault management, e.g. fault detection or location
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses

Definitions

  • the present invention relates to a failure monitoring system and a failure monitoring method for an optical cable assembly, and more particularly, in an optical cable assembly including a power line unit and an optical fiber unit, the failure of the power line unit and the location of the failure occurs in the optical fiber unit.
  • the present invention relates to a failure monitoring system and a method for monitoring the failure.
  • cables used as power and / or communication transmission means require immediate recovery in the event of a failure during their installation or after use.
  • obstacles may occur during the construction of the submarine cable, and during the use of the submarine cable, such as fishing activities or submarine earthquake, etc.
  • Environmental factors can cause the submarine cable to fail.
  • Optical time domain reflectometer is widely used as a monitoring system for detecting the failure.
  • the OTDR system can detect a location where a failure occurs with a very high level of accuracy, but it can be applied to an optical fiber with optical fiber because it uses scattered light of supervisory light, and can not be applied to other power lines.
  • a so-called 'Thumping method' as a way of detecting the location of the failure relatively accurately.
  • the method detects an acoustic signal caused by a magnetic change or a partial discharge generated at a fault point of the power line when a high voltage is applied to the power line.
  • a magnetic sensor for sensing the magnetic force change or a microphone for detecting the magnetic force change is applied by applying a relatively high voltage to the power line and the cable is installed to detect the magnetic force change or the acoustic signal. Determine the point of failure.
  • the thumping method is relatively easy to detect the point of failure occurs in the case of the underground line is installed on the land, but the detection is not easy when the power line is installed across the sea.
  • a diver may detect a magnetic sensor or a microphone by moving the magnetic sensor or microphone along the submarine cable in order to detect a failure point by the above method, or by applying the magnetic sensor or the microphone to a robot moving the submarine. Can be installed and detected.
  • a detection method is significantly higher in cost and time than the detection of underground ships, and is accompanied by a problem that the detection is very difficult due to the seabed environment such as currents and depths.
  • the voltage applied to the power line is increased to facilitate the detection of a magnetic force change or an acoustic signal on the seabed, the power line may be damaged.
  • An object of the present invention is to provide a failure monitoring system and a failure monitoring method capable of accurately detecting a failure point of the power line in order to solve the above problems.
  • an object of the present invention is to provide a failure monitoring system and a failure monitoring method in which the cost and time are significantly reduced when a monitoring system for detecting a failure point of the power line is constructed.
  • an object of the present invention is to provide a failure monitoring system and a failure monitoring method that can detect the failure point of the power line significantly faster and more accurately than the conventional cost and time.
  • An object of the present invention as described above is in the fault monitoring system for an optical cable assembly having a power line unit having a conductor and an optical fiber unit provided adjacent to the power line unit and having at least one optical fiber, wherein the conductor is selectively A voltage supply unit connected to supply a voltage equal to or greater than a predetermined value, and a monitoring device for detecting a failure of the power line unit and a location of the failure by detecting an acoustic signal generated by the power line unit by an optical signal of the at least one optical fiber. It is achieved by a failure monitoring system of the photoelectric cable assembly characterized in that it comprises a.
  • the voltage supply unit may supply a voltage having a predetermined pattern.
  • the voltage supply unit may intermittently supply a waveform corresponding to the second voltage value having a relatively larger value than the predetermined first voltage value.
  • the voltage supply unit may increase the supplied voltage in a predetermined unit when the failure is not detected by the monitoring apparatus.
  • the monitoring apparatus may include an OTDR for inputting monitoring light into the optical fiber and receiving the scattered monitoring light, and an analysis device for detecting whether a failure occurs and a location where the failure occurs by analyzing a waveform of the received monitoring light.
  • the OTDR may inject the monitoring light having a wavelength of a relatively narrow band into the optical fiber.
  • the analysis device detects the change in the intensity of the monitoring light received from the optical fiber by the acoustic signal generated by the power line unit may determine that the failure occurs when the intensity change is more than a predetermined reference value.
  • the analysis apparatus stores distance information indicating a relative relationship between the distance of the photoelectric cable assembly and the distance of the optical fiber unit when the optical cable assembly is installed, and the distance determined by the optical fiber unit when the failure occurs. May be converted into a distance of the photoelectric cable assembly according to the distance information.
  • optical fiber unit and the power line unit may form a photoelectric composite cable.
  • the object of the present invention as described above in the fault monitoring method of the photoelectric cable assembly comprising a power line unit having a conductor and an optical fiber unit provided adjacent to the power line unit and having at least one optical fiber, the power line unit Applying a voltage to a conductor of the light source, injecting monitoring light into the optical fiber unit to detect an acoustic signal generated by the power line unit, and receiving the scattered monitoring light, analyzing a waveform of the scattered monitoring light, and analyzing the power line
  • a failure monitoring method of the photoelectric cable assembly comprising the step of determining whether a failure of the unit and the step of detecting the failure occurs when it is determined that the failure has occurred.
  • the method may further include setting a voltage initial value supplied to the conductor of the power line unit.
  • the method may further include increasing the voltage applied to the conductor of the power line unit in a predetermined unit.
  • a voltage having a predetermined pattern may be supplied to the conductor of the power line unit.
  • applying the voltage to the conductor of the power line unit may intermittently supply a waveform corresponding to the second voltage value having a relatively larger value than the predetermined first voltage value.
  • the step of determining whether or not the failure occurs may determine whether the failure occurs by analyzing the waveform of the received monitoring light.
  • the monitoring light having a wavelength of a relatively narrow band can be incident to the optical fiber.
  • the step of determining whether or not the occurrence of the failure may detect the change in intensity due to the phase change of the received monitoring light may determine that the failure occurs when the change in intensity is greater than a predetermined reference value.
  • the opto-optic cable assembly further comprises the step of storing in advance the distance information showing the relative relationship between the distance of the photoelectric cable assembly and the distance of the optical fiber unit, and in case of detecting the location of the failure
  • the distance determined by the optical fiber unit may be converted into the distance of the photoelectric cable assembly according to the distance information.
  • optical fiber unit and the power line unit may form a photoelectric composite cable.
  • the optical fiber unit provided adjacent to the power line unit
  • by utilizing the optical fiber unit it is possible to significantly reduce the time and cost used to monitor the failure of the power line unit compared with the conventional.
  • the present invention can accurately and quickly determine the failure point by detecting the acoustic signal generated at the failure point of the power line unit by the optical fiber unit.
  • FIG. 1 is a cross-sectional view showing the structure of a photoelectric composite cable which is one of the photoelectric cable assemblies;
  • FIG. 2 is a cross-sectional view showing a binding cable in which a power line unit and an optical fiber unit are simply bound as one of the photoelectric cable assemblies;
  • FIG. 3 is a schematic diagram showing a schematic configuration of an OTDR system
  • FIG. 4 is a graph showing the intensity of the monitoring light according to the distance in FIG.
  • FIG. 5 is a schematic diagram showing the configuration of a failure monitoring system for monitoring a failure of an optoelectronic cable assembly according to the present invention
  • FIG. 6 is a schematic diagram illustrating a change in monitoring light of an optical fiber unit due to an acoustic signal generated in the power line unit in FIG. 5;
  • FIG. 7 is a graph showing waveforms of monitoring light analyzed by the monitoring apparatus in FIG. 5;
  • FIG. 8 is a graph illustrating a pattern of a voltage supplied to the power line unit in FIG. 5;
  • FIG. 9 is a flowchart illustrating a fault monitoring method for fault monitoring of an optoelectronic cable assembly according to the present invention.
  • FIG. 10 is a schematic diagram showing a relative arrangement of an optical fiber unit and a power line unit in the optoelectronic cable assembly
  • FIG. 11 is a schematic diagram showing a method of detecting a relative length of the optical fiber unit and the optical cable assembly by the monitoring apparatus when the optical cable assembly is embedded in the seabed;
  • the optical fiber unit disposed adjacent to the power line unit is used. That is, in the present invention, the fault position of the power line unit is sensed using a so-called 'photoelectric cable assembly' in which the power line unit and the optical fiber unit are disposed adjacent to each other.
  • the term 'optical fiber and power line aggregated cable' refers to the optical fiber unit and the optical fiber unit together with the optical fiber and power line composite cable connected to the optical fiber unit and the power line unit by a filler.
  • the power line unit is defined as including all binding cables simply bound by taping or the like.
  • FIG. 1 and 2 are cross-sectional views illustrating the configuration of an optical cable assembly having an optical fiber unit 100 and a power line unit 300.
  • FIG. 1 is a cross-sectional view showing the configuration of a photoelectric composite cable 1000 in the photoelectric cable assembly.
  • the photoelectric composite cable 1000 is illustrated as an example of a three-phase cable having three power line units 300, but is not limited thereto and may be applied to a single-core cable having one power line unit.
  • the power line unit 300 includes a conductor 310 made of a conductive material such as copper and aluminum, and wraps the conductor 310 and removes the air layer between the conductor 310 and the insulating layer 320 described later. Insulation surrounding the inner semiconducting layer 330 and the inner semiconducting layer 330, which suppresses partial discharge at an interface with the panel and mitigates local electric field concentration in the insulating layer 320.
  • the layer 320 includes an outer semiconducting layer 340 that surrounds the insulating layer 320 and serves to shield the cable and to apply an even electric field to the insulating layer 320.
  • the power line unit 300 may further include a metal sheath 350 and a polymer sheath 360 surrounding the metal sheath 350 on the outside of the outer semiconducting layer 340.
  • materials and specifications of the conductor 310, the inner semiconducting layer 330, the insulating layer 320, the outer semiconducting layer 340, the metal sheath 350 and the polymer sheath 360 of the power line unit 300 may be used.
  • Silver may vary depending on the use of the photoelectric composite cable, transmission voltage and the like.
  • the optical fiber unit 100 is provided adjacent to one or more power line units 300.
  • the optical fiber unit 100 may include at least one optical fiber 111 and a tube 112 for receiving the optical fiber 111.
  • Each of the optical fiber units 100 includes a predetermined number of optical fibers 111 mounted together with the filler 113 in the tube 112, and the tube may be made of a rigid material such as stainless steel.
  • the optical fiber unit 100 may further include a sheath 130 surrounding the tube 112.
  • the photoelectric composite cable 1000 is made of a subsea photoelectric composite cable installed across a seabed such as the sea, for example, various protective layers for protecting internal components even in harsh environments such as seawater, salt, etc. in the sea. It may be provided.
  • PP polypropylene
  • the optical composite power cable 1000 may include a filler 400 to protect the power line unit 300 and the optical fiber unit 100 inside the bedding layer 700.
  • FIG. 2 is a cross-sectional view illustrating a binding cable 1000 ′ in which the optical fiber unit 100 and the power line unit 300 are simply bound by taping or the like in the optical cable assembly.
  • the binding cable 1000 ′ has a structure in which the optical fiber unit 100 and the power line unit 300 are connected by taping 800 or the like.
  • the structures of the optical fiber unit 100 and the power line unit 300 are similar to those of the embodiment of FIG. 1 described above, and thus repeated descriptions thereof will be omitted.
  • Figure 3 shows a monitoring system 10 using the OTDR to detect the failure position when a failure occurs in the P2MP type optical path formed by the optical fiber unit.
  • OLT supplier-side optical line terminal 12
  • CO central office
  • ONT Optical Network Terminal
  • the provider terminal 12 is provided in a central base station such as a telephone station to generate signal light having a plurality of wavelengths different from each other, and multiplex it to be transmitted to the consumer terminal 40 through the splitter module 20.
  • the splitter module 20 splits the multiplexed signal light provided from the supplier side terminal 12 for each wavelength and transmits the multiplexed signal light to the consumer side terminal 40.
  • the monitoring system 10 may be provided with a monitoring device 50 that is selectively connected to the optical fiber unit of the optical path.
  • the monitoring device 50 may include an analyzer 80 described later together with an optical time domain reflectometery (OTDR) sensor or an OTDR unit.
  • OTDR optical time domain reflectometery
  • the OTDR unit generates monitoring light having a wavelength different from that of the supplier-side terminal 12. That is, the monitoring device 50 uses monitoring light having a different band from the signal light. This prevents the wavelengths of the signal light and the supervisor from overlapping each other so that the signal light is not affected by the supervisory light.
  • the wavelength of the signal light is approximately 1600 nm or less and may have a wavelength of 1310 nm, 1490 nm, 1550 nm, or the like.
  • the wavelength of the monitoring light may be about 1600 nm or more, and specifically, the wavelength of the monitoring light may be about 1625 or 1650 nm.
  • the distance to the point of failure can be measured.
  • the monitoring device 50 including the OTDR unit is connected to the optical fiber of each optical path through the WDM coupler 14.
  • the monitoring light generated and transmitted by the OTDR unit is combined with the signal light via the WDM coupler 14.
  • the incident monitoring light is received scattered or reflected, the peak according to the length of each line branched from one supplier side terminal is shown at different distances in the OTDR unit. Therefore, the operator can determine which line peak is by checking the distance of the peak along each line in the OTDR unit.
  • reflecting means for example, the filter unit 60, may be provided to reflect only the monitoring light while passing the signal light through the input terminal of each consumer-side terminal 40 to reflect the monitoring light.
  • the filter unit 60 may be provided in a connector connecting the consumer side terminal 40 and the optical path. As such, when the filter unit 60 is provided, the peak signal reflected at the end of the optical path, that is, at the input terminal of the consumer side terminal 40 becomes larger, so that peak detection through the OTDR unit can be more easily performed.
  • the monitoring device 50 having the above-described OTDR unit may be connected to the WDM coupler 14 through an optical switching unit 70.
  • the optical switching unit 70 may connect the plurality of WDM couplers 14 and the monitoring device 50 to each other. That is, the plurality of WDM coupler 14 is connected to the monitoring device 50 through one optical switching unit 70 can reduce the installation cost, installation time and installation space.
  • FIG. 4 is a graph from which a waveform of monitoring light is derived from the above-described monitoring device.
  • the horizontal axis shows distance (km) and the vertical axis shows light intensity (dB).
  • the monitoring light measured by the monitoring device suffers a certain loss (dB / km) per distance of the optical fiber and is reduced to a predetermined slope as shown in the drawing.
  • the waveform of the monitoring light as shown in the figure includes a predetermined noise.
  • the waveform of the monitoring light may generate an abnormal waveform in the form of peaks and steps, and compares the abnormal waveform with a normal case where no failure occurs, and determines whether there is a failure, and further, the distance to the abnormal waveform is determined by the speed of light In the case of failure due to the inversion through the arrival time, the distance to the point where the peak of the input terminal of the consumer side occurs can be identified.
  • the conventional monitoring system using the OTDR has the advantage that it is easy to determine the failure of the optical fiber unit having an optical fiber, it is possible to detect the failure position relatively accurately and quickly.
  • the conventional monitoring system can be used only for the fault determination of the optical fiber unit having the optical fiber as described above, for example, there is a problem that can not be applied to the fault determination and fault position detection of the power line unit.
  • a failure monitoring system and a failure monitoring method for monitoring a failure of the power line unit using the optical fiber unit in an optical fiber assembly having an optical fiber unit and a power line unit will be described.
  • FIG. 5 illustrates a configuration of a failure monitoring system for monitoring a failure of the power line unit using the optical fiber unit 100 in the photoelectric cable assembly having the optical fiber unit 100 and the power line unit 300 according to the present invention.
  • the monitoring system is selectively connected to the conductor 310 of the power line unit 300 to supply a voltage equal to or greater than a predetermined value, and the sound generated from the power line unit 300.
  • a monitoring device 2000 for detecting the signal 304 by the optical signal of the one or more optical fibers 111 and determining whether the power line unit 300 has a failure and the location where the failure has occurred.
  • the failure monitoring system applies a so-called 'Thumping method' for detecting a sound signal generated at the failure point 302 of the power line unit 300 by supplying a voltage to the power line unit 300, the sound
  • the optical fiber 111 of the optical fiber unit 100 provided adjacent to the power line unit 300 is used.
  • the monitoring device 2000 analyzes the waveform of the monitoring light in the OTDR 2100 and the optical fiber 111 which enters the monitoring light into the optical fiber 111 and receives the scattered monitoring light, and whether or not a failure occurs. It may be provided with an analysis device 2200 for detecting the location of the failure.
  • an analysis device 2200 for detecting the location of the failure.
  • FIG. 6 is a schematic diagram illustrating a change in monitoring light scattered from the optical fiber 111 by an acoustic signal generated at a failure point of the power line unit 300.
  • the acoustic signal 304 affects the monitoring light 115 of the optical fiber 111 of the adjacent optical fiber unit 100. That is, the change of the medium such as the density of the optical fiber 111 is generated by the acoustic signal 304, whereby the monitoring light 115A of the optical fiber 111 affected by the acoustic signal 304 is Compared to the monitoring light 115 of the other region of the optical fiber 111 is a phase change occurs.
  • the phase change of the optical fiber 111 may be sensed through the OTDR 2100 and the analyzer 2200 of the monitoring device 2000.
  • FIG. 7 shows a graph in which the monitoring light in which the phase change has occurred is measured by the OTDR 2100.
  • the above-described analyzer 2200 detects an intensity change caused by a phase change of monitoring light scattered from the optical fiber 111 by an acoustic signal propagated due to a failure in the power line unit, and the intensity change is greater than or equal to a predetermined reference value. It is determined that the failure has occurred to detect the location of the failure.
  • the phase change occurs in the monitoring light by the acoustic signal
  • the change occurs in the waveform of the monitoring light as shown in FIG. 7, for example, to form a predetermined peak as shown in the drawing. do. Therefore, it may be determined that the power line unit 300 has a failure when the peak is compared with a predetermined reference value. Furthermore, it is possible to detect the distance of the point where the failure occurred through the position of the peak.
  • the voltage supply unit 3000 when the voltage supply unit 3000 supplies the voltage to the power line unit 300, the voltage supply unit 3000 to more easily detect the sound signal generated at the point of occurrence of the failure A voltage having a predetermined pattern can be supplied. 8 illustrates a pattern according to an example of a voltage supplied to the power line unit by the voltage supply unit 3000.
  • the supplied voltage pattern may intermittently supply a waveform corresponding to a second voltage value having a relatively larger value than a predetermined first voltage value.
  • the change in the acoustic signal generated at the point of failure of the power line unit 300 becomes clearer than the case of supplying a voltage having a flat waveform, whereby the noise and the point of failure are caused.
  • the pattern of the voltage supplied from the voltage supply unit 3000 is not limited to the above-described pattern of FIG. 8 and may be modified in various forms.
  • the OTDR 2100 may use a so-called 'Coherent OTDR' using supervisory light having a narrow wavelength band, that is, supervisory light having a narrow band wavelength, in order to detect a phase change of an optical signal.
  • a so-called 'Coherent OTDR' using supervisory light having a narrow wavelength band, that is, supervisory light having a narrow band wavelength, in order to detect a phase change of an optical signal.
  • the voltage supply unit 3000 when the voltage is applied by the voltage supply unit 3000, the higher the voltage can be more easily detect the acoustic signal generated at the point of failure of the power line unit 300.
  • the voltage supply unit 3000 when the voltage supplied to the power line unit 300 becomes high, damage may occur to the power line unit 300 by a partial discharge occurring at a failure point of the power line unit 300. Therefore, in the present embodiment, when the failure of the power line unit 300 is suspected, the voltage supply unit 3000 may increase the voltage supplied to the power line unit 300 in a predetermined unit. That is, when a failure of the power line unit 300 is suspected due to a power drop of the power line unit 300 or the like, the voltage supply unit 3000 sets a relatively low voltage initial value and supplies the power line unit 300 to the power line unit 300. Done.
  • the monitoring light is measured and analyzed by the OTDR 2100 and the analyzer 2200 to determine whether there is a failure and to detect a location of the failure.
  • the voltage supply unit 3000 increases the voltage supplied to the power line unit 300 in a predetermined unit. Will be supplied. That is, when a failure of the power line unit 300 is suspected but the failure is not detected, the voltage value supplied to the power line unit 300 is increased in a predetermined unit and supplied.
  • the acoustic signal generated at the point of occurrence of the failure of the power line unit 300 can be detected more clearly, so that the failure determination and the position detection can be facilitated.
  • the voltage value supplied to the power line unit 300 is raised to a predetermined value or more, as described above, the power line unit 300 may be damaged by the supplied voltage itself. Therefore, the upper limit of the voltage supplied to the power line unit 300 may be determined to be an appropriate value that does not cause damage to the power line unit 300.
  • FIG. 9 is a flowchart illustrating a fault monitoring method for fault monitoring of an optoelectronic cable assembly according to the present invention.
  • the fault monitoring method includes applying a voltage to the conductor 310 of the power line unit 300 (S910), and detecting the sound signal generated by the power line unit 300. Injecting the monitoring light into the optical fiber of 100 and receiving the scattered monitoring light (S930), and analyzing the waveform of the scattered monitoring light to determine whether the power line unit has a failure (S950) and that the failure has occurred If it is determined whether or not detecting the failure location includes a step (S970).
  • the voltage supply unit 3000 supplies a voltage to the power line unit 300 (S910).
  • the voltage may be supplied with a predetermined pattern. Since it has been described above with reference to FIG. 8, repeated description thereof will be omitted.
  • the voltage supply unit 3000 may set an initial voltage value to be supplied before supplying a voltage to the conductor 310 of the power line unit 300. As described above, the voltage initial value may be set relatively low.
  • the monitoring system according to the present invention is very sensitive because it detects the occurrence of the failure and the location of the power line unit 300 by the optical fiber 111 of the optical fiber unit 100. Therefore, the failure of the power line unit 300 can be sufficiently detected even at a relatively lower voltage value than the conventional method.
  • the monitoring light is incident on the optical fiber of the optical fiber unit 100 and the scattered monitoring light is received (S930).
  • the OTDR 2100 enters the monitoring light into the optical fiber 111 of the optical fiber unit 100 and receives the scattered monitoring light. In this case, when the OTDR 2100 enters the monitoring light, the OTDR 2100 enters the monitoring light having the narrow band wavelength.
  • the analyzer 2200 analyzes a waveform of the monitoring light to detect whether a failure occurs (S950) and a location where the failure occurs (S970).
  • the analyzer 2200 detects a change in intensity of the monitoring light due to a phase change of the monitoring light scattered from the optical fiber 111.
  • the intensity change will be shown in the form of a predetermined peak in the waveform of the monitoring light. Therefore, the intensity change (peak) is compared with a predetermined reference value to determine whether a failure occurs (S950), and if it is determined that a failure occurs, the location where the failure occurs is detected (S970).
  • the voltage supply unit 3000 Increases the voltage supplied to the power line unit 300 in a predetermined unit (S955) and supplies the voltage to the power line unit 300.
  • the increasing of the voltage in a predetermined unit may be performed for a plurality of predetermined times or until the voltage value is increased to an appropriate upper limit that does not cause damage to the power line unit 300.
  • an embodiment of the present invention can reduce the error rate.
  • FIG. 10 is a schematic diagram illustrating a relative distance between the photoelectric composite cable 1000 and the optical fiber unit 100 when the photoelectric composite cable 1000 of FIG. 1 is installed.
  • the optical fiber unit 100 when the photoelectric composite cable 1000 is installed, the optical fiber unit 100 is arranged in a curved shape rather than a straight shape as shown in FIG. 10. Can be. Therefore, an error may occur between the distance L cable of the photoelectric composite cable 1000 and the distance of the optical fiber unit L optical fiber . In particular, as the length of the photoelectric composite cable 1000 increases, such as a submarine cable, The error becomes even larger.
  • the photoelectric composite cable Since it is applied to the distance of 1000, due to the difference in distance between the photoelectric composite cable 1000 and the optical fiber unit 100 may not accurately detect the point of failure occurs, an error may occur.
  • the photoelectric composite cable 1000 when the photoelectric composite cable 1000 is installed as shown in FIG. 11, for example, when the photoelectric composite cable 1000 is installed on the sea floor by the ship 4000, the above-described monitoring is performed.
  • the relative distance between the photoelectric composite cable 1000 and the optical fiber unit 100 may be measured using the system. That is, when the photoelectric composite cable 1000 is installed, the installation distance of the photoelectric composite cable 1000 may be calculated by measuring in real time the length of the cable installed toward the seabed in the vessel 4000.
  • an acoustic signal is generated by artificially impacting the photoelectric composite cable at a specific position of the ship, and at the same time, the base position of the optical fiber at the acoustic signal generating point using the fault monitoring system. Recognizing and mapping the position of the photonic composite cable position and the optical fiber (mapping) can be improved the problem position error problem due to the mismatch of the optical fiber length and the photonic composite cable length.
  • the distance of the optical fiber unit 100 disposed inside the photoelectric composite cable 1000 is the monitoring light to the optical fiber unit 100 by the monitoring device 2000 when the photoelectric composite cable 1000 is installed
  • the incident distance of the optical fiber unit 100 may be measured by measuring the monitoring light.
  • the monitoring light may be incident at a predetermined period or may be incident with a predetermined waveform.
  • FIG. 12 is a graph showing the distance of the photoelectric composite cable 1000 and the length of the optical fiber 111 of the optical fiber unit 100 by the above-described method.
  • distance information as shown in FIG. 12 showing a relative relationship between the installation distance of the photoelectric composite cable 1000 and the distance of the optical fiber unit 100 is shown in the graph or table.
  • it may be stored in the analysis device 2200 of the above-described monitoring device 2000.
  • the actual failure occurs and the distance is measured by the optical fiber unit 100 and the distance is converted to the distance of the photoelectric composite cable 1000 by measuring the distance shown in FIG. It can be converted using a graph or a table.
  • the distance of the point where the failure occurs more accurately can be detected by the photoelectric composite cable 1000.
  • the optical fiber unit provided adjacent to the power line unit
  • by utilizing the optical fiber unit it is possible to significantly reduce the time and cost used to monitor the failure of the power line unit compared with the conventional.
  • the present invention can accurately and quickly determine the failure point by detecting the acoustic signal generated at the failure point of the power line unit by the optical fiber unit.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Locating Faults (AREA)

Abstract

La présente invention concerne un système de surveillance de défaillance et un procédé de surveillance de défaillance pour un ensemble câble optoélectronique. Le système de surveillance de défaillance pour un ensemble câble optoélectronique de la présente invention comprend : une unité ligne électrique comportant un conducteur ; une unité fibre optique adjacente à l'unité ligne électrique et comportant une ou plusieurs fibres optiques ; une unité d'alimentation en tension connectée sélectivement au conducteur pour fournir ainsi une tension ayant une valeur prédéterminée ou supérieure ; et un dispositif de surveillance permettant de surveiller, par des signaux optiques de la ou des fibres optiques, des signaux acoustiques produits par l'unité ligne électrique pour déterminer ainsi si oui ou non une défaillance dans l'unité ligne électrique se produit et déterminer un emplacement où la défaillance se produit.
PCT/KR2015/005462 2014-08-19 2015-06-01 Système de surveillance de défaillance et procédé de surveillance de défaillance pour ensemble câble optoélectronique WO2016027966A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2014-0107489 2014-08-19
KR20140107489 2014-08-19
KR10-2014-0166223 2014-11-26
KR1020140166223A KR102244743B1 (ko) 2014-08-19 2014-11-26 광전케이블집합체의 장애감시시스템 및 장애감시방법

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024066404A1 (fr) * 2022-09-29 2024-04-04 华为技术有限公司 Procédé et dispositif de reconnaissance d'affaissement de câble optique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100038079A1 (en) * 2008-08-15 2010-02-18 Schlumberger Technology Corporation Determining a status in a wellbore based on acoustic events detected by an optical fiber mechanism
KR100983561B1 (ko) * 2009-10-30 2010-09-27 한국전력공사 해저케이블 고장점 탐색 시스템 및 방법
US20120006117A1 (en) * 2010-07-10 2012-01-12 Kordon Ulrich Method and Apparatus for Locating Cable Faults
JP2013079906A (ja) * 2011-10-05 2013-05-02 Neubrex Co Ltd 分布型光ファイバ音波検出装置
KR20140052439A (ko) * 2012-10-24 2014-05-07 엘에스전선 주식회사 광선로 감시장치, 이를 구비한 광선로 감시시스템 및 그 제어방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100038079A1 (en) * 2008-08-15 2010-02-18 Schlumberger Technology Corporation Determining a status in a wellbore based on acoustic events detected by an optical fiber mechanism
KR100983561B1 (ko) * 2009-10-30 2010-09-27 한국전력공사 해저케이블 고장점 탐색 시스템 및 방법
US20120006117A1 (en) * 2010-07-10 2012-01-12 Kordon Ulrich Method and Apparatus for Locating Cable Faults
JP2013079906A (ja) * 2011-10-05 2013-05-02 Neubrex Co Ltd 分布型光ファイバ音波検出装置
KR20140052439A (ko) * 2012-10-24 2014-05-07 엘에스전선 주식회사 광선로 감시장치, 이를 구비한 광선로 감시시스템 및 그 제어방법

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024066404A1 (fr) * 2022-09-29 2024-04-04 华为技术有限公司 Procédé et dispositif de reconnaissance d'affaissement de câble optique

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