WO2024090638A1 - System for monitoring accelerated degradation of hvdc power cable - Google Patents

System for monitoring accelerated degradation of hvdc power cable Download PDF

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Publication number
WO2024090638A1
WO2024090638A1 PCT/KR2022/016924 KR2022016924W WO2024090638A1 WO 2024090638 A1 WO2024090638 A1 WO 2024090638A1 KR 2022016924 W KR2022016924 W KR 2022016924W WO 2024090638 A1 WO2024090638 A1 WO 2024090638A1
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WIPO (PCT)
Prior art keywords
cable
test
deterioration
module
test cable
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PCT/KR2022/016924
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French (fr)
Korean (ko)
Inventor
최진욱
김해종
이승원
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한국전기연구원
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Publication of WO2024090638A1 publication Critical patent/WO2024090638A1/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02Means for indicating or recording specially adapted for thermometers
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08Locating faults in cables, transmission lines, or networks
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00Power cables
    • H01B9/02Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00Circuit arrangements for dc mains or dc distribution networks
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/36Arrangements for transfer of electric power between ac networks via a high-tension dc link

Definitions

  • the present invention relates to an accelerated deterioration monitoring system for HVDC power cables. More specifically, the present invention relates to an accelerated deterioration monitoring system for HVDC power cables, which are plastic power cables such as XLPE power cables, by monitoring and processing operation information and cable deterioration information by an accelerated deterioration device to provide meaningful results. It concerns technology that outputs information.
  • HVDC high-voltage direct current
  • HVDC is one of the power grid systems.
  • HVDC is a high-capacity long-distance transmission system of direct current.
  • XLPE cable or thermoplastic insulated cable is being considered. there is.
  • XLPE is an excellent material that has been proven for a long time in alternating current and is also widely used in direct current, but recyclable and eco-friendly thermoplastic cables have recently begun to be applied and require more verification than XLPE.
  • a test device that can accelerate cable deterioration in electrical stress, mechanical stress, and thermal stress environments, shorten the characteristic test period, and enable reliable verification.
  • Figure 1 is a diagram showing the configuration of an accelerated deterioration device of the earlier application invention 'Accelerated deterioration device for HVDC power cable'
  • Figure 2 is a cross-sectional view and an external view of the test cable shown in Figure 1
  • Figure 3 is a diagram shown in Figure 1.
  • This is a configuration diagram of the cable fixing module
  • FIG. 4 is a configuration diagram of the temperature sensing module shown in FIG. 1.
  • the previously filed invention 'Accelerated deterioration device 100 for HVDC power cables' is a device that produces test samples to examine the deterioration process of power cables. As shown in FIG. 1, it includes a test cable 10 and a cable fixing module. (20), a DC high voltage application module 40 for applying high voltage direct current to the test cable 10 mounted on the cable fixing module 20, a temperature detection module 60, and a control module for controlling the entire device ( 90).
  • the internal structure of the test cable 10 has a copper wire 11 with a circular cross-section made of copper located in the center, an internal semiconducting layer 12 surrounding the copper wire 11, and an internal semiconducting layer 12 surrounding the copper wire 11. It includes an insulator 13 surrounding the semiconducting layer 12 and an external semiconducting layer 14 surrounding the insulator 13.
  • an XLPE insulated power cable is described, but it will be apparent that the present invention can also be applied to other plastic insulated power cables, including XLPE insulated power cables.
  • the test cable 10 may further include a metal sheath surrounding the external semiconducting layer 14 and an anti-corrosion layer made of synthetic resin surrounding the metal sheath.
  • test cable 10 has a unit test length as shown in FIG. 2b, and for testing, the outer semiconducting layer 14, the insulator 13, and the inner semiconducting layer 12 are separated at a certain distance from both ends. This is achieved by removing only the copper wire 11 to form a spiral copper wire portion 11a.
  • the insulator portion 13a that exposes the insulator 13 by removing the outer semiconducting layer 14 at a certain distance from the end of the copper wire portion 11a.
  • the remainder includes a cable deterioration portion 14a that maintains the shape of the general test cable 10.
  • the copper wire portion 11a and the insulator portion 13a are configured symmetrically on the left and right sides centered on the cable deterioration portion 14a, and the insulator portions 13a on both sides prevent charges from accumulating in the insulator 13. After electrically connecting them to each other, they are grounded, and the cable deterioration part 14a is also grounded.
  • the cable fixing module 20 includes a transformer 21 for applying thermal stress to the test cable 10 and an insulation disposed on the secondary side of the transformer 21. It is composed of a cylinder (22).
  • the transformer 21 includes an iron core 23 and a primary coil 24 wound on the primary side of the iron core 23, and the insulating cylinder 22 is disposed on the secondary side, and the insulating cylinder ( In 22), the cable deterioration section 14a of the test cable 10 is wound several times and serves as a secondary coil of the transformer section 21.
  • the insulating cylinder 22 is made of an insulating material such as synthetic resin, FRP, etc., and has a diameter of 10 to 20 times the diameter of the test cable 10, and the reaction force against the force winding the cable deterioration portion 14a is transmitted to the test cable 10 to apply mechanical stress.
  • the insulating cylinders 22 may have different diameters to apply different mechanical stresses.
  • the direct current high voltage application module 40 is a component that performs the function of applying high voltage direct current to the copper wire portion 11a of the test cable 10, and is applied to the test cable 10. Apply electrical stress.
  • a temperature sensing module 60 is added as shown in FIG. 1 to measure the amount of thermal stress applied through the thermal power supply unit 30 and control the amount of thermal stress applied.
  • the temperature sensing module 60 is configured in the same form as the transformer 21 of the cable fixing module 20, and has a primary coil 64 on the primary side of the electric iron core 63. This is wound, and an insulating cylinder 62 is disposed on the secondary side, and a secondary coil 65 is wound around the insulating cylinder 62.
  • the secondary coil 65 is formed by winding the cable deterioration portion 14a of a test cable of the same type as the test cable 10 of the cable fixing module 20.
  • the primary coil 64 of the temperature sensing module 60 is the same as the primary coil 24 of the cable fixing module 20, and the secondary coil 65 is wound on the insulating cylinder 22. It has the same size and characteristics as the test cable 10, is configured to be wound with the same number of turns, and the insulating cylinder 62 is also configured in the same way.
  • a temperature sensor 66 for detecting the temperature of the secondary coil 65 is installed on or near the surface of the secondary coil 65.
  • the temperature sensing module 60 Since the temperature sensing module 60 has the same voltage characteristics as the cable fixing module 20, the current that becomes the set temperature is checked in the temperature sensing module 60 and the same current is installed in the cable fixing module 20. It is used to control the temperature by flowing it through the test cable (10).
  • the primary coil 65 is also supplied with power by the thermal power supply unit 30, if necessary, power is supplied from the thermal power supply unit 30 to the primary coil 65 based on the temperature of the temperature sensor 66.
  • the power supplied can be controlled.
  • control module 90 can control the thermal power supply unit 30, as shown in FIG. 1, and also controls the secondary coil 65 using information from the temperature sensor 66.
  • the input amount can be calculated, and additionally, the power supplied to the thermal power supply unit 30 can be controlled using information from the temperature sensor 66.
  • the previously applied HVDC power cable accelerated deterioration device 100 configured as described above proceeds with the deterioration process of the test cable 10, stops the deterioration test at a predetermined test time, and separates the test cable 10. I order it.
  • the test cable 10 separated in this way produces a test sample for observing the state of accelerated deterioration according to the purpose of the test by cutting the cable deterioration portion 14a as shown in FIG. 5 and using insulator peeling, slicing, etc. methods.
  • test samples are delivered to separate test devices according to each test purpose, and their electrical, mechanical, and chemical properties are measured to inspect the deterioration state of the power cable.
  • the previously applied HVDC power cable accelerated deterioration device 100 of FIG. 1 is essentially a device that accelerates deterioration of the test cable 10 and then produces the test sample.
  • test samples are produced at each predetermined test time regardless of the degree of deterioration of the test cable 10, so production of meaningless test samples for a certain number of times saves time and cost. There is a problem that causes significant losses.
  • test sample since the test sample must be produced every 'predetermined test time', in order to continuously examine the cumulative deterioration state, a plurality of devices 20 are formed as a set, as shown in FIG. 6, and each Test cables (10) must be separated one at a time for each test time to produce test samples.
  • a thermal power supply unit 30 is installed in each accelerated deterioration device for a plurality of HVDC power cables.
  • this problem is that when a plurality of devices are divided into one set and each device is separated at each test time to produce test samples, the thermal power supply connected to the test cable 10 is removed while accelerated deterioration is in progress. (30) There is a problem in that the device is wasted as unused equipment, so in the prior art method, in order to solve this problem, when one device is separated and removed, an accelerated deterioration device for the HVDC power cable is assembled for a new test, and then added to the group and accelerated. Deterioration is progressing.
  • the prior art method involves efforts such as spiraling the copper wire portion 11a of the test cable and stripping the external semiconducting layer 14 in order to assemble a new cable fixing module 20 to be added at each test time.
  • efforts such as spiraling the copper wire portion 11a of the test cable and stripping the external semiconducting layer 14 in order to assemble a new cable fixing module 20 to be added at each test time.
  • the present invention further improves the accelerated deterioration device for HVDC power cables published in Patent Publication No. 10-2022-0062747. It guides the collection of test samples for meaningful analysis while observing the deterioration progress of the cable during accelerated deterioration of the test cable,
  • the purpose is to provide an accelerated deterioration monitoring system for HVDC power cables that reduces time and cost losses caused by the production of meaningless test samples for a certain period of time.
  • the purpose is to provide an accelerated deterioration monitoring system for HVDC power cables that solves the problems of space requirements and equipment costs for testing by simplifying equipment in the test site.
  • HVDC power cable that solves the problem of wasting effort and preparation time, such as spiraling the test cable and stripping the external semiconducting layer to insert a new cable fixing module into the empty space created by collecting test samples every test time.
  • the purpose is to provide an accelerated deterioration monitoring system of
  • the present invention is formed at a certain length and has a cross-sectional structure of a copper wire formed at the center, an internal conductive layer surrounding the copper wire, an insulator surrounding the internal conductive layer, and an external semiconducting layer surrounding the insulator.
  • cable deterioration section having an overall cross-sectional structure; an insulator portion formed at both ends of the cable deterioration portion by removing the outer semiconducting layer to expose an insulator; and a test cable having a copper wire portion formed at both ends of the insulator portion with only the copper wire exposed.
  • a cable fixing module formed by winding the cable deterioration portion of the test cable on an insulating cylinder formed on the secondary side of the iron core and winding the primary coil on the primary side of the iron core;
  • a direct current high voltage application module connected to the copper wire portion of the test cable to apply electrical stress;
  • a thermal power supply unit that supplies current to the primary coil to generate an induced current that applies thermal stress to the test cable; a first ground line connected to the insulator part of the test cable and grounded; a second ground line connected to the external semiconducting layer of the test cable and grounded; an ammeter formed on the second ground line to measure current; a control module that controls the entire device; an accelerated deterioration monitoring module that collects, processes, and calculates information from the ammeter and the DC high voltage application module to calculate and output conduction current;
  • the technical gist is a monitoring system for accelerated deterioration of an HVDC power cable, which is configured to monitor conduction current information of the test cable during accelerated deterioration of the
  • test cable be an accelerated deterioration monitoring system for an HVDC power cable, characterized in that a metal coating for a grounding electrode is formed on the outside of the external semiconducting layer for connection to the second grounding line.
  • the accelerated deterioration monitoring system of the HVDC power cable is installed independently on the cable fixing module, winds the cable deterioration part of the test cable on an insulating cylinder formed on the secondary side of the iron core, and installs a primary coil on the primary side of the iron core. It is preferable that the accelerated deterioration monitoring system of the HVDC power cable further comprises a temperature detection module that winds the cable and includes a temperature sensor that measures the temperature state of the deteriorated cable and transmits it to the control module. .
  • test cable is formed to a length that can be cut n times (n is a natural number) as a unit test length, thereby accelerating the deterioration of the test cable, and is cut by the unit test length when each deterioration determination point is reached, thereby reducing the deterioration of the power cable. It is desirable to use an accelerated deterioration monitoring system for HVDC power cables, which is characterized in that the remaining test cables continue to undergo accelerated deterioration while producing samples for condition observation.
  • the cable fixing module is a unit cable fixing module in which a test cable is wound around an insulating cylinder formed on one side of the iron core, and a primary coil for a heat source is wound on the other side of the iron core, and the test cable has a unit test length m.
  • m is a natural number of 2 or more
  • the test cable of each unit cable fixation module is formed by connecting in series in a closed loop, and the primary coil of the entire unit cable fixation module is connected in series with one line, It is formed to supply power to the primary coil of the entire unit cable fixing module by the thermal power supply unit, accelerating the deterioration of the test cable, and separating the unit cable fixing modules one by one when each deterioration judgment point is reached, thereby fixing the power cable. While producing samples for observing the deterioration state, it is desirable that the remaining unit cable fixing modules be used as an accelerated deterioration monitoring system for HVDC power cables, which is characterized in that accelerated deterioration continues.
  • the accelerated deterioration monitoring system for the HVDC power cable includes a simple unit cable fixation module in which a test winding is wound only on an insulating cylinder without an iron core and a primary coil, and is connected in closed loop series with the test cable of another unit cable fixation module; It is desirable to have an accelerated deterioration monitoring system for HVDC power cables that is configured to receive induced current generated from the test cable of another unit cable fixing module and apply thermal stress to the test cable.
  • test cable when a test cable undergoes accelerated deterioration, it guides the collection of test samples for meaningful analysis while observing the deterioration progress of the cable, thereby reducing time and cost losses due to the production of meaningless test samples for a certain period of time.
  • HVDC power cable that solves the problem of wasting effort and preparation time, such as spiraling the test cable and stripping the external semiconducting layer to insert a new cable fixing module into the empty space created by collecting test samples every test time.
  • Figure 1 is a diagram of the accelerated deterioration device configuration of the earlier invention 'Accelerated deterioration device for HVDC power cable'
  • Figure 2 is a cross-sectional view and external view of the test cable shown in Figure 1
  • Figure 3 is a configuration diagram of the cable fixing module shown in Figure 1
  • FIG. 4 is a configuration diagram of the temperature sensing module shown in Figure 1
  • Figure 5 is an explanatory diagram of the production and use of test samples in test cables
  • Figure 6 is a state diagram of use in the prior art method.
  • FIG. 7 is a basic configuration diagram of the present invention
  • FIG. 8 is a configuration diagram of the temperature sensing module of the present invention
  • Figure 9 is a configuration diagram of an embodiment expanded from Figure 7
  • Figures 10 and 11 are diagrams illustrating the implementation of Figure 7
  • Figure 12 is a configuration diagram of another embodiment expanded from Figure 7
  • Figure 1 is a diagram showing the configuration of an accelerated deterioration device of the earlier application invention 'Accelerated Deterioration Device for HVDC Power Cable'
  • Figure 2 is a cross-sectional view and an external view of the test cable shown in Figure 1
  • Figure 3 is a cable shown in Figure 1.
  • Figure 4 is a block diagram of a fixed module
  • Figure 4 is a block diagram of the temperature sensing module shown in Figure 1
  • Figure 5 is an explanatory diagram of the production and use of a test sample in a test cable
  • Figure 6 is a diagram of use in a prior art method.
  • Figure 7 is a basic configuration diagram of the present invention
  • Figure 8 is a configuration diagram of the temperature detection module of the present invention
  • Figure 9 is an embodiment configuration diagram expanded from Figure 7
  • Figures 10 and 11 are diagrams 7 is an implementation explanatory diagram
  • FIG. 12 is a configuration diagram of another embodiment expanded from FIG. 7.
  • the present invention relates to a monitoring system for accelerated deterioration of HVDC power cables. As described above, the present invention improves and improves the technical problems of 'Accelerated deterioration device for HVDC power cables' in Korean Patent Publication No. 10-2022-0062747. It was ordered.
  • the present invention includes a cable fixing module 20 and a heat power supply unit 30 formed of an iron core 23, an insulating cylinder 22, a test cable 10, and a primary coil 24; It is comprised of a first ground line 130, a second ground line 140, an ammeter 200, a control module 90, and an accelerated deterioration monitoring module 900.
  • the cable fixing module 20 winds the test cable 10 around an insulating cylinder 22 formed on the secondary side of the iron core 23, and installs a primary coil 24 for a heat source on the primary side of the iron core 23. It is formed by winding.
  • the cable fixing module is the same device as the cable fixing module 20 described in Korean Patent Publication No. 10-2022-0062747 ‘Accelerated deterioration device for HVDC power cables’, and a detailed description thereof is provided in ‘Technology behind the invention’. As mentioned above, the description in Korean Patent Publication No. 10-2022-0062747, 'Accelerated Deterioration Device for HVDC Power Cables' will be replaced and explained using the same drawing number.
  • the cable fixing module 20 includes a transformer 21 for applying thermal stress to the test cable 10 and an insulation disposed on the secondary side of the transformer 21. It is composed of a cylinder (22).
  • the transformer 21 includes an iron core 23 and a primary coil 24 wound on the primary side of the iron core 23, and the insulating cylinder 22 is disposed on the secondary side, and the insulating cylinder ( In 22), the cable deterioration section 14a of the test cable 10 is wound several times and serves as a secondary coil of the transformer section 21.
  • test cable (10) is also the same as the test cable (10) described in Korean Patent Publication No. 10-2022-0062747, ‘Accelerated Deterioration Device for HVDC Power Cables’, and detailed description thereof is provided in ‘Background Technology of the Invention’.
  • Korean Patent Publication No. 10-2022-0062747, 'Accelerated Deterioration Device for HVDC Power Cables' will be replaced and explained using the same drawing number.
  • the internal structure of the test cable 10 is, as shown in Figure 2a, a copper wire 11 of a circular cross-section made of copper is located in the center, and an internal semiconducting layer 12 surrounding the copper wire 11 and an insulator 13 surrounding the inner semiconducting layer 12 and an outer semiconducting layer 14 surrounding the insulator 13.
  • the test cable 10 may further include a metal sheath surrounding the external semiconducting layer 14 and an anti-corrosion layer made of synthetic resin surrounding the metal sheath.
  • thermal power supply unit 30 that supplies power to the direct current high voltage application module 40 and the primary coil 24 is also described in the Korean published patent, as described in 'Background technology of the invention'. 10-2022-0062747 This will be replaced with the description of ‘Accelerated deterioration device for HVDC power cable’ and will be explained using the same drawing number.
  • the direct current high voltage application module 40 is a component that performs the function of applying high voltage direct current to the copper wire portion 11a of the test cable 10, and is applied to the test cable 10. Apply electrical stress.
  • the first ground line 130 of the present invention is a line connected to the insulator portion 13a of the test cable 10 to ground the test cable 10, as shown in Figure 7, and the second ground line 140 is the test cable ( It is a line connected to the external semiconducting layer 14 of 10) and grounded.
  • the present invention further includes an ammeter 200 formed on the second ground line 140 to measure the conduction current of the test cable, whereby the second ground line 100 is connected during accelerated deterioration of the test cable 10. It has the feature of being able to monitor current information flowing through (140).
  • the accelerated deterioration monitoring module 900 of the present invention collects, processes, and calculates the measurement information of the ammeter 200 and the output information of the DC high voltage application module 40 to calculate a conduction current that can determine the deterioration information of the test cable. This is the circuit part that outputs the output.
  • the accelerated deterioration monitoring module 900 uses a direct current high voltage and conduction voltage applied over time. Changes in the amount of current can be observed, and since this means observing the deterioration state of the test cable 10 over time, it can be used as information indicating when to produce a test sample with the test cable 10.
  • the accelerated deterioration monitoring module 900 stores in advance the amount of conduction current or deterioration state information required to produce the test sample, and outputs the information at the time of production of the test sample when the deterioration state of the test cable 10 reaches this level. It is desirable to do so.
  • the present invention unlike the Korean Patent Publication No. 10-2022-0062747 'Accelerated deterioration device for HVDC power cables', is a device that can directly monitor conduction current information while applying electrical, physical, and thermal stress to the test cable. There is a characteristic.
  • the present invention has the advantage of being a device that observes the degree of deterioration of the test cable 10 and guides the production time of each test sample in conjunction with this.
  • test samples were produced in which deterioration had not sufficiently progressed, resulting in waste of cost and effort due to meaningless testing.
  • the point in time when deterioration had progressed sufficiently and significantly was observed. There is an advantage in solving these problems because test samples can be produced while doing so.
  • test cable 10 of the present invention it may be considered to form a metal coating for a ground electrode on the outside of the external semiconducting layer 14 for connection to the second ground line 140.
  • the metal sheath surrounding the outer semiconducting layer 14 of the test cable 10 can be used as the metal sheath.
  • a temperature detection module 60 is used as a reference test module to estimate the temperature of the test cable 10 and obtain input information of the primary coil 65. ) is attached.
  • a temperature sensing module 60 including a temperature sensor 660 is installed in parallel and performs the same function.
  • the structure of the temperature sensing module 60 is also largely the same as the temperature sensing module 60 described in Korean Patent Publication No. 10-2022-0062747 'Accelerated Deterioration Apparatus for HVDC Power Cables', and a detailed description thereof is provided in 'Background of the Invention'. As described in 'Technology', it will be replaced with the description in Republic of Korea Patent Publication No. 10-2022-0062747 'Accelerated deterioration device for HVDC power cable', and will be explained with the same drawing number.
  • the temperature sensing module 60 winds the cable deterioration portion 14a of the test cable 10 around the insulating cylinder 62 formed on the secondary side of the iron core 63, and the The primary coil 64 is wound on the primary side of the iron core 23.
  • the temperature sensor 660 of the present invention perforates the insulation from the cable deterioration section 14a to the copper wire 11 in order to measure the temperature state of the conductor within the cable deterioration section 14a. There is a difference in that the temperature of the copper wire 11 is measured by contacting the copper wire 11.
  • the measured temperature information of the temperature sensor 660 is transmitted to the control module 90.
  • the control module 90 of the present invention is a device that controls the entire device, and controls the output of the DC high voltage application module 40, receives temperature information from the temperature sensor 66, and outputs the thermal power supply unit 30. takes control.
  • the temperature information measured at the same time has a very significant feature and is transmitted to the accelerated deterioration monitoring module 900. It is desirable.
  • the temperature information collected by the control module 90 is not only used as the primary coil input information, but also as electrical physical information in which DC high voltage input information, conduction current amount, time, and temperature data are interrelated. Since it can be utilized, it is desirable to transmit it to the accelerated deterioration monitoring module 900.
  • control module 90 and the accelerated deterioration monitoring module 900 are separated for the purpose of explaining the present invention, but in reality, of course, they can be formed as one device.
  • the test cable 10 can be formed as a test cable with a length that can be cut n (n is a natural number) times as a unit test length, as shown in FIGS. 9 to 11.
  • 10 and 11 10(n) is a test cable with a unit test length that can be cut n (n is a natural number) times, 10(x) is a test cable with a unit test length, and 10(n-x) is 10( This is a test cable with a length of 10(x) cut from n).
  • the deterioration of the test cable 10 is accelerated, and when each deterioration determination point is reached, the unit test length is cut as shown in FIG. 11, thereby reducing the power.
  • a copper wire portion (11a) and an insulator portion (13a) are formed on the cut portion of the remaining test cable (n-x), and accelerated deterioration continues to allow the deterioration history to accumulate. do.
  • test cable 10 is formed into a test cable 10 with a length that can be cut n times (n is a natural number) as a unit test length as shown in FIG. 10, test samples can be produced n times.
  • n is a natural number
  • FIG. 9 there is an advantage in that only one thermal power supply unit 30 is used.
  • This advantage is also achieved by using a new cable fixing module (20) in order to avoid wasting the thermal power supply unit (30) used as unused equipment by the cable fixing module (20), which is removed every time a test sample is produced, as in the prior art. ), there is no need to assemble and add additional parts, which has the advantage of greatly reducing test time and effort.
  • the present invention is to form the test cable 10 into m unit cable fixing modules (m is a natural number of 2 or more) having a unit test length as shown in FIG. 12, and to test each unit cable fixing module 20. Cables can also be formed by connecting them in series in a closed loop.
  • the primary coil of the entire unit cable fixing module is connected in series with one line, and power is supplied to the primary coil of the entire unit cable fixing module by one heat power supply unit. There are characteristics that allow it to be formed.
  • test samples can be produced m+1 times, but only one DC high voltage application module (40) and thermal power supply unit (30) are used, simplifying the equipment in the test site and saving the space required for testing. This has the advantage of significantly lowering equipment costs.
  • the thermal power supply unit 20 does not remain as unused equipment, so there is no need to assemble and add a new cable fixing module 20, which can greatly reduce test time and effort. There will be.
  • the present invention is a simple unit cable fixing module (20) formed with a test winding that is wound only on an insulating cylinder without an iron core and a primary coil, and is connected in closed loop series with the test cable of another unit cable fixation module. It consists of -1).
  • test cable 10-1 of the simple unit cable fixation module 20-1 is connected in series with the test cable 10 of another unit cable fixation module, the test cable 10 of the other unit cable fixation module The induced current is transmitted as is, making it possible to apply thermal stress to the test cable (10-1) of the simple unit cable fixing module (20-1).
  • this simple unit cable fixing module 20-1 has the advantage of simplifying the device.
  • the test sample production environment is newly evolved by the solution principle, and more accurate power cable deterioration is achieved.
  • a synergy effect is created that allows the acquisition of physical information about the device, and a device is provided that significantly reduces time, space, effort, and cost.

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
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  • Spectroscopy & Molecular Physics (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

The present invention relates to a system for monitoring accelerated degradation of a HVDC power cable, the system comprising: a cable holding module formed by winding a cable degradation portion of a test cable around an insulated cylinder formed on the secondary side of an iron core, and by winding a primary-side coil around the primary side of the iron core; a DC high-voltage application module for applying electric stress to the test cable; a degradation power supply portion for generating an induced current that applies thermal stress to the test cable; a first ground line connected to an insulator portion of the test cable such that same is grounded; a second ground line connected to an external semiconductive layer of the test cable such that same is grounded; an ammeter formed on the second ground line to measure currents; a control module for controlling the entire device; and an accelerated degradation monitoring module for collecting/processing/computing information of the ammeter and the DC high-voltage application module, thereby computing and outputting conduction currents. The present invention advantageously provides a system for monitoring accelerated degradation of a HVDC power cable, wherein the conduction current of a test cable is measured while degrading the test cable in a specific condition, thereby determining whether the cable is degraded or not, such that the time of production of the test sample can be known, and equipment necessary for sample production is simplified, thereby reducing device costs and efforts.

Description

HVDC 전력케이블의 가속열화 모니터링 시스템Accelerated deterioration monitoring system for HVDC power cables
본 발명은 HVDC 전력케이블의 가속열화 모니터링 시스템에 관한 것으로, 더욱 상세하게는 XLPE 전력 케이블 등의 플라스틱 전력 케이블인 HVDC 전력케이블의 가속열화 장치에 의한 운전 정보 및 케이블 열화 정보를 모니터링 및 연산 가공하여 유의미한 정보를 출력시키는 기술에 관한 것이다.The present invention relates to an accelerated deterioration monitoring system for HVDC power cables. More specifically, the present invention relates to an accelerated deterioration monitoring system for HVDC power cables, which are plastic power cables such as XLPE power cables, by monitoring and processing operation information and cable deterioration information by an accelerated deterioration device to provide meaningful results. It concerns technology that outputs information.
HVDC(high-voltage direct current)는 전력 그리드 시스템 중 하나로 기존의 교류를 사용하는 그리드와 대조적으로 직류의 대용량 장거리 송전 시스템으로 근래 많은 연구가 진행되고 있으며, XLPE 케이블 또는 Thermoplastic 절연 케이블의 적용이 고려되고 있다.HVDC (high-voltage direct current) is one of the power grid systems. In contrast to the existing grid using alternating current, HVDC is a high-capacity long-distance transmission system of direct current. Recently, much research has been conducted, and the application of XLPE cable or thermoplastic insulated cable is being considered. there is.
이와 같은 플라스틱 절연 케이블을 교류가 아닌 직류에 사용하기 위해서는, 가교부산물에 의한 공간전하 특성, 열화에 따른 도전율 변화가 전계분포, 케이블 수명에 미치는 영향에 대한 검증이 필요한 실정이다.In order to use such plastic insulated cables for direct current rather than alternating current, it is necessary to verify the impact of space charge characteristics due to crosslinking by-products and changes in conductivity due to deterioration on electric field distribution and cable lifespan.
특히. XLPE는 아주 우수한 재료로 교류에서는 오랜 검증이 되었고, 직류에서도 많은 사용되고 있으나, 재활용 가능하고 친환경적인 Thermoplastic 케이블은 최근에 적용되기 시작하며 XLPE 보다 좀 더 검증이 필요한 점이 있다.especially. XLPE is an excellent material that has been proven for a long time in alternating current and is also widely used in direct current, but recyclable and eco-friendly thermoplastic cables have recently begun to be applied and require more verification than XLPE.
따라서, 이러한 케이블의 검증을 위하여 전기적 스트레스, 기계적 스트레스 및 열적 스트레스 환경에서 케이블의 열화를 가속시켜, 특성 시험 기간을 단축하고 신뢰성있는 검증을 할 수 있는 시험 장치가 필요하다.Therefore, in order to verify these cables, a test device is needed that can accelerate cable deterioration in electrical stress, mechanical stress, and thermal stress environments, shorten the characteristic test period, and enable reliable verification.
본 출원인은 상기와 같은 필요에 부합하기 위하여 대한민국 공개특허 10-2022-0062747 'HVDC 전력케이블의 가속열화 장치'를 출원하여, XLPE 전력 케이블 등의 플라스틱 전력 케이블을 전기적 스트레스, 기계적 스트레스 및 열적 스트레스를 동시에 인가하여 플라스틱 전력 케이블의 열화를 빠른 시간에 확인할 수 있는 HVDC 전력케이블의 가속열화 장치를 제공한 바가 있다.In order to meet the above needs, the present applicant has applied for Korean Patent Publication No. 10-2022-0062747, 'Accelerated deterioration device for HVDC power cables', to protect plastic power cables such as XLPE power cables from electrical stress, mechanical stress, and thermal stress. An accelerated deterioration device for HVDC power cables has been provided that can quickly check the deterioration of plastic power cables by applying them at the same time.
이하, 본 발명의 설명을 위하여 상기 선출원 발명 'HVDC 전력케이블의 가속열화 장치'에 관하여 우선 살펴보기로 한다.Hereinafter, for the purpose of explaining the present invention, we will first look at the previously filed invention 'Accelerated deterioration device for HVDC power cable'.
이하의 도 1은 상기 선출원 발명 'HVDC 전력케이블의 가속열화 장치'의 가속열화 장치 구성도이며, 도 2는 도 1에 도시된 시험용 케이블의 단면도 및 외형도이며, 도 3은 도 1에 도시된 케이블 고정 모듈의 구성도이며, 도 4는 도 1에 도시된 온도 감지 모듈의 구성도이다.Figure 1 below is a diagram showing the configuration of an accelerated deterioration device of the earlier application invention 'Accelerated deterioration device for HVDC power cable', Figure 2 is a cross-sectional view and an external view of the test cable shown in Figure 1, and Figure 3 is a diagram shown in Figure 1. This is a configuration diagram of the cable fixing module, and FIG. 4 is a configuration diagram of the temperature sensing module shown in FIG. 1.
상기 선출원 발명 'HVDC 전력케이블의 가속열화 장치(100)'는 전력케이블의 열화 과정을 살펴보기 위한 테스트 시료를 생산하는 장치로서, 도 1에 도시된 바와 같이, 시험용 케이블(10), 케이블 고정 모듈(20), 상기 케이블 고정 모듈(20)에 장착된 시험용 케이블(10)에 고전압의 직류를 인가하는 직류 고전압 인가모듈(40), 온도 감지 모듈(60) 및 전체 장치의 제어를 위한 제어 모듈(90)을 포함하여 구성된다.The previously filed invention 'Accelerated deterioration device 100 for HVDC power cables' is a device that produces test samples to examine the deterioration process of power cables. As shown in FIG. 1, it includes a test cable 10 and a cable fixing module. (20), a DC high voltage application module 40 for applying high voltage direct current to the test cable 10 mounted on the cable fixing module 20, a temperature detection module 60, and a control module for controlling the entire device ( 90).
상기 시험용 케이블(10)의 내부 구조는 도 2a에 도시된 바와 같이, 중앙에 동재질의 원형 단면의 동선(11)이 위치하고, 상기 동선(11)을 둘러싸는 내부 반도전층(12)과 상기 내부 반도전층(12)을 둘러싸는 절연체(13)와 상기 절연체(13)를 둘러싸는 외부 반도전층(14)을 포함한다. As shown in FIG. 2A, the internal structure of the test cable 10 has a copper wire 11 with a circular cross-section made of copper located in the center, an internal semiconducting layer 12 surrounding the copper wire 11, and an internal semiconducting layer 12 surrounding the copper wire 11. It includes an insulator 13 surrounding the semiconducting layer 12 and an external semiconducting layer 14 surrounding the insulator 13.
도 2의 실시예에서는 XLPE 절연 전력 케이블에 대하여 설명하나, 본 발명은 XLPE 절연 전력 케이블을 포함하는 다른 플라스틱 절연 전력케이블에 대해서도 적용할 수 있음은 자명하다 할 것이다.In the embodiment of FIG. 2, an XLPE insulated power cable is described, but it will be apparent that the present invention can also be applied to other plastic insulated power cables, including XLPE insulated power cables.
상기 시험용 케이블(10)은 외부 반도전층(14)을 둘러싸는 금속시스와 금속시스를 둘러싸는 합성수지 재질의 방식층을 추가로 포함할 수 있다.The test cable 10 may further include a metal sheath surrounding the external semiconducting layer 14 and an anti-corrosion layer made of synthetic resin surrounding the metal sheath.
한편, 상기 시험용 케이블(10)은 도 2b에 도시된 바와 같이 단위 테스트 길이를 가지며, 시험을 위하여 양끝단의 일정 거리를 외부 반도전층(14), 절연체(13) 및 내부 반도전층(12)을 제거하여, 동선(11)만 나선된 동선부(11a)를 형성시켜 이루어진다.Meanwhile, the test cable 10 has a unit test length as shown in FIG. 2b, and for testing, the outer semiconducting layer 14, the insulator 13, and the inner semiconducting layer 12 are separated at a certain distance from both ends. This is achieved by removing only the copper wire 11 to form a spiral copper wire portion 11a.
또한, 상기 동선부(11a) 끝단에서 일정거리 외부 반도전층(14)을 제거하여 절연체(13)를 노출시키는 절연체부(13a)를 포함한다.In addition, it includes an insulator portion 13a that exposes the insulator 13 by removing the outer semiconducting layer 14 at a certain distance from the end of the copper wire portion 11a.
그리고 나머지는 일반 시험용 케이블(10) 형태를 유지하는 케이블 열화부(14a)를 포함한다.And the remainder includes a cable deterioration portion 14a that maintains the shape of the general test cable 10.
상기 동선부(11a)와 절연체부(13a)는 케이블 열화부(14a)를 중심으로 좌우측에 대칭적으로 구성하고, 양측의 절연체부(13a)는 상기 절연체(13)에 전하가 모이는 것을 방지하기 위하여 서로 전기적으로 연결한 후, 접지시키고, 상기 케이블 열화부(14a) 역시 접지시킨다.The copper wire portion 11a and the insulator portion 13a are configured symmetrically on the left and right sides centered on the cable deterioration portion 14a, and the insulator portions 13a on both sides prevent charges from accumulating in the insulator 13. After electrically connecting them to each other, they are grounded, and the cable deterioration part 14a is also grounded.
한편, 상기 케이블 고정 모듈(20)은 도 3에 도시된 바와 같이, 상기 시험용 케이블(10)에 열적인 스트레스 인가를 위한 변압부(21)와 상기 변압부(21)의 2차측에 배치되는 절연 원통(22)을 포함하여 구성된다.Meanwhile, as shown in FIG. 3, the cable fixing module 20 includes a transformer 21 for applying thermal stress to the test cable 10 and an insulation disposed on the secondary side of the transformer 21. It is composed of a cylinder (22).
상기 변압부(21)는 철심(23)과 상기 철심(23)의 일차측에 권선되는 1차측 코일(24)을 포함하고, 2차측에는 상기 절연 원통(22)이 배치되며, 상기 절연 원통(22)에는 상기 시험용 케이블(10) 중 케이블 열화부(14a)가 수회 권선되어 상기 변압부(21)의 2차측 코일 역할을 한다.The transformer 21 includes an iron core 23 and a primary coil 24 wound on the primary side of the iron core 23, and the insulating cylinder 22 is disposed on the secondary side, and the insulating cylinder ( In 22), the cable deterioration section 14a of the test cable 10 is wound several times and serves as a secondary coil of the transformer section 21.
상기 절연 원통(22)은 합성수지, FRP 등과 같이 절연재질로 구성되고, 직경은 상기 시험용 케이블(10) 직경의 10배 내지 20배로 구성되며, 상기 케이블 열화부(14a)를 권선시키는 힘에 대한 반력을 상기 시험용 케이블(10)에 전달하여 기계적인 스트레스가 인가되게 한다.The insulating cylinder 22 is made of an insulating material such as synthetic resin, FRP, etc., and has a diameter of 10 to 20 times the diameter of the test cable 10, and the reaction force against the force winding the cable deterioration portion 14a is transmitted to the test cable 10 to apply mechanical stress.
필요한 경우 상기 절연 원통(22)은 직경을 달리하여 각각 서로 다른 기계적인 스트레스를 인가할 수 있다.If necessary, the insulating cylinders 22 may have different diameters to apply different mechanical stresses.
한편, 상기 1차측 코일(24)에는 도 1에서 보여지는 바와 같이 상기 2차측 코일인 케이블 열화부(14a)에 열을 인가하기 위하여 열용 전원 공급부(30)를 통하여 전원이 인가된다.Meanwhile, as shown in FIG. 1, power is applied to the primary coil 24 through the heat power supply unit 30 to apply heat to the cable deterioration unit 14a, which is the secondary coil.
상기 1차측 코일(24)에 상기 열용 전원 공급부(30)를 통하여 전원이 인가되면, 상기 케이블 열화부(14a)인 2차측 코일에 유도 전류가 발생되며, 상기 유도 전류에 의하여 자체 줄열이 발생하여 시험용 케이블(10)에 열적 스트레스를 인가한다.When power is applied to the primary coil 24 through the thermal power supply unit 30, an induced current is generated in the secondary coil, which is the cable deterioration unit 14a, and self-Joule heat is generated by the induced current. Apply thermal stress to the test cable (10).
한편, 직류 고전압 인가모듈(40)은 도 1에 도시된 바와 같이, 고전압의 직류를 상기 시험용 케이블(10)의 동선부(11a)에 인가하는 기능을 수행하는 구성으로서, 시험용 케이블(10)에 전기적 스트레스를 인가한다.Meanwhile, as shown in FIG. 1, the direct current high voltage application module 40 is a component that performs the function of applying high voltage direct current to the copper wire portion 11a of the test cable 10, and is applied to the test cable 10. Apply electrical stress.
한편, 상기 시험용 케이블(10)은 고전압이 인가되므로 온도측정을 위한 센서 부착이 불가능하여 상기 열적 스트레스 인가를 직접 측정하기 곤란한 문제점이 있다.Meanwhile, since high voltage is applied to the test cable 10, it is impossible to attach a sensor for temperature measurement, making it difficult to directly measure the application of thermal stress.
이러한 문제점을 해결하기 위하여, 상기 열용 전원 공급부(30)를 통한 열적 스트레스 인가량을 측정하고, 상기 열적 스트레스 인가량을 제어하기 위하여 도 1에서 보여지는 바와 같이 온도 감지 모듈(60)이 추가된다.In order to solve this problem, a temperature sensing module 60 is added as shown in FIG. 1 to measure the amount of thermal stress applied through the thermal power supply unit 30 and control the amount of thermal stress applied.
상기 온도 감지 모듈(60)은 도 4에 도시된 바와 같이, 상기 케이블 고정 모듈(20)의 변압부(21)와 동일한 형태로 구성되며, 전기철심(63)의 일차측에는 1차측 코일(64)이 권선되고, 2차측에는 절연 원통(62)이 배치되며, 상기 절연 원통(62)에는 2차측 코일(65)이 권선된다. As shown in FIG. 4, the temperature sensing module 60 is configured in the same form as the transformer 21 of the cable fixing module 20, and has a primary coil 64 on the primary side of the electric iron core 63. This is wound, and an insulating cylinder 62 is disposed on the secondary side, and a secondary coil 65 is wound around the insulating cylinder 62.
상기 2차측 코일(65)은 상기 케이블 고정 모듈(20)의 시험용 케이블(10)과 동일한 형태의 시험용 케이블의 케이블 열화부(14a)가 동일하게 권선된 것이다.The secondary coil 65 is formed by winding the cable deterioration portion 14a of a test cable of the same type as the test cable 10 of the cable fixing module 20.
즉, 상기 온도 감지 모듈(60)의 1차측 코일(64)은 케이블 고정 모듈(20)의 1차측 코일(24)과 동일하고, 상기 2차측 코일(65)은 상기 절연 원통(22)에 권선된 시험용 케이블(10)과 동일한 크기와 특성을 가지며, 동일한 회수로 권선되도록 구성하고, 상기 절연 원통(62) 역시 동일하게 구성한다.That is, the primary coil 64 of the temperature sensing module 60 is the same as the primary coil 24 of the cable fixing module 20, and the secondary coil 65 is wound on the insulating cylinder 22. It has the same size and characteristics as the test cable 10, is configured to be wound with the same number of turns, and the insulating cylinder 62 is also configured in the same way.
선출원 기술에서는, 상기 2차측 코일(65)의 온도를 감지하기 위한 온도센서(66)가 상기 2차측 코일(65) 표면 또는 표면 인근에 설치된다.In the prior application technology, a temperature sensor 66 for detecting the temperature of the secondary coil 65 is installed on or near the surface of the secondary coil 65.
상기 온도 감지 모듈(60)은 상기 케이블 고정 모듈(20)과 동일한 변압 특성을 가지므로, 상기 온도 감지 모듈(60)에서 설정 온도가 되는 전류를 확인하고 동일한 전류를 케이블 고정 모듈(20)에 장착된 시험용 케이블(10)에 흘려서 온도를 제어하는데 사용한다.Since the temperature sensing module 60 has the same voltage characteristics as the cable fixing module 20, the current that becomes the set temperature is checked in the temperature sensing module 60 and the same current is installed in the cable fixing module 20. It is used to control the temperature by flowing it through the test cable (10).
상기 1차측 코일(65) 역시 상기 열용 전원 공급부(30)에 의하여 전원이 공급되므로, 필요한 경우 상기 온도센서(66)의 온도를 기초로 상기 열용 전원 공급부(30)에서 1차측 코일(65)로 공급되는 전원을 제어시킬 수 있다.Since the primary coil 65 is also supplied with power by the thermal power supply unit 30, if necessary, power is supplied from the thermal power supply unit 30 to the primary coil 65 based on the temperature of the temperature sensor 66. The power supplied can be controlled.
이와 같은 구성에 의하여 상기 온도 감지 모듈(60)에서 획득되는 입력대비 온도값을 이용하여 상기 케이블 고정 모듈(20)의 열적 스트레스 인가량을 제어할 수 있게 된다.With this configuration, it is possible to control the amount of thermal stress applied to the cable fixing module 20 using the temperature value compared to the input obtained from the temperature sensing module 60.
한편, 상기 제어 모듈(90)은 도 1에 도시된 바와 같이, 상기 열용 전원 공급부(30)를 제어할 수 있으며, 또한, 상기 온도센서(66)의 정보를 이용하여 2차측 코일(65)의 입력량을 산정할 수 있으며, 추가적으로 상기 온도센서(66)의 정보를 이용하여 상기 열용 전원 공급부(30)에 공급되는 전원을 제어할 수 있다.Meanwhile, the control module 90 can control the thermal power supply unit 30, as shown in FIG. 1, and also controls the secondary coil 65 using information from the temperature sensor 66. The input amount can be calculated, and additionally, the power supplied to the thermal power supply unit 30 can be controlled using information from the temperature sensor 66.
이상과 같이 구성되는 선출원된 HVDC 전력케이블의 가속열화 장치(100)는 시험용 케이블(10)의 열화 과정을 진행하며, 미리 정해진 테스트 시간이 되면 열화 시험을 중단하고, 상기 시험용 케이블(10)을 분리시킨다.The previously applied HVDC power cable accelerated deterioration device 100 configured as described above proceeds with the deterioration process of the test cable 10, stops the deterioration test at a predetermined test time, and separates the test cable 10. I order it.
이와 같이 분리시킨 시험용 케이블(10)는 도 5에 도시된 바와 같이 케이블 열화부(14a)를 절취하여 절연체 필링, 슬라이스 등의 방법으로 시험 목적에 따라 가속열화 상태를 관찰하는 테스트 시료를 생산한다.The test cable 10 separated in this way produces a test sample for observing the state of accelerated deterioration according to the purpose of the test by cutting the cable deterioration portion 14a as shown in FIG. 5 and using insulator peeling, slicing, etc. methods.
상기 테스트 시료는 각 시험 목적에 따라 별도의 테스트 장치로 입고하여 전력 케이블의 열화 상태를 검사하기 위한 전기적, 기계적, 화학적 특성을 측정하게 된다.The test samples are delivered to separate test devices according to each test purpose, and their electrical, mechanical, and chemical properties are measured to inspect the deterioration state of the power cable.
즉, 선출원된 도 1의 HVDC 전력케이블의 가속열화 장치(100)는 실질적으로 시험용 케이블(10)을 가속열화시킨 후, 상기 테스트 시료를 생산하는 장치가 된다.That is, the previously applied HVDC power cable accelerated deterioration device 100 of FIG. 1 is essentially a device that accelerates deterioration of the test cable 10 and then produces the test sample.
그런데, 이와 같은 종래기술방식에 의하면, 상기한 바와 같이 시험용 케이블(10)의 열화 정도와 무관하게 미리 정해진 매 테스트 시간마다 테스트 시료를 생산하게 되므로, 일정 횟수 동안 무의미한 테스트 시료의 생산으로 시간적, 비용적 손실을 가져오는 문제점이 있다.However, according to this prior art method, as described above, test samples are produced at each predetermined test time regardless of the degree of deterioration of the test cable 10, so production of meaningless test samples for a certain number of times saves time and cost. There is a problem that causes significant losses.
한편, 상기한 바와 같이 상기 테스트 시료는 '미리 정해진 테스트 시간'마다 생산되어야 하므로, 누적 열화 상태를 연속적으로 살펴보기 위해서는 도 6에서 보여지는 바와 같이 복수 개의 장치(20)를 1조로 형성시키고, 각 시험용 케이블(10)을 매 테스트 시간마다 1개씩 분리하여 테스트 시료를 생산해야 한다.Meanwhile, as mentioned above, since the test sample must be produced every 'predetermined test time', in order to continuously examine the cumulative deterioration state, a plurality of devices 20 are formed as a set, as shown in FIG. 6, and each Test cables (10) must be separated one at a time for each test time to produce test samples.
그런데, 이와 같은 종래기술방식에 의할 경우, 도 6에서 보여지는 바와 같이 1조의 thrgksms 복수 개의 HVDC 전력케이블의 가속열화 장치 마다 열용 전원공급부(30)가 설치되고 있다.However, in the case of this prior art method, as shown in FIG. 6, a thermal power supply unit 30 is installed in each accelerated deterioration device for a plurality of HVDC power cables.
즉, 종래기술방시겡 의할 경우, 필요한 테스트 시료 수 만큼의 열용 전원공급부(30)가 필요하게 되어, 시험 장소 내의 장비가 복잡해지고, 시험을 위한 필요공간이 증가되며 장비 비용이 높아지는 문제점이 있다.In other words, if the prior art method is used, as many thermal power supply units 30 as the number of test samples required are required, causing problems in that the equipment in the test site becomes complicated, the space required for testing increases, and the equipment cost increases. there is.
또한, 이와 같은 문제점은 복수 개의 장치를 1조로 구분하고, 각 장치를 매 테스트 시간마다 분리하여 테스트 시료를 생산하는 경우, 가속열화가 진행되는 동안에는 제거시킨 시험용 케이블(10)에 결합되었던 열용 전원공급부(30)가 불용 장비로 낭비되는 문제점이 있으므로, 종래기술방식에서는 이러한 문제점을 해결하기 위하여 하나의 장치가 분리 제거되면 새로운 테스트를 위한 HVDC 전력케이블의 가속열화 장치를 조립하여 해당 조에 더 추가시키고 가속열화를 진행하고 있다.In addition, this problem is that when a plurality of devices are divided into one set and each device is separated at each test time to produce test samples, the thermal power supply connected to the test cable 10 is removed while accelerated deterioration is in progress. (30) There is a problem in that the device is wasted as unused equipment, so in the prior art method, in order to solve this problem, when one device is separated and removed, an accelerated deterioration device for the HVDC power cable is assembled for a new test, and then added to the group and accelerated. Deterioration is progressing.
이에 따라, 종래기술방식은 매 테스트 시간마다, 추가시킬 새로운 케이블 고정 모듈(20)을 조립하기 위하여 시험용 케이블의 동선부(11a)을 나선시키고, 외부 반도전층(14)을 탈피시키는 등의 노력과 준비가 필요해지는 문제점이 있다.Accordingly, the prior art method involves efforts such as spiraling the copper wire portion 11a of the test cable and stripping the external semiconducting layer 14 in order to assemble a new cable fixing module 20 to be added at each test time. There is a problem that requires preparation.
본 발명은 공개특허 10-2022-0062747 HVDC 전력케이블의 가속열화 장치를 더욱 개선시키는 것으로서, 시험용 케이블의 가속열화 시 케이블의 열화 진행 상태를 관찰하면서 유의미한 분석용 테스트 시료 채취를 할 수 있도록 안내하여, 일정 시간동안 무의미한 테스트 시료의 생산에 의한 시간적, 비용적 손실을 절감시키는 HVDC 전력케이블의 가속열화 모니터링 시스템을 제공하는 것을 목적으로 한다.The present invention further improves the accelerated deterioration device for HVDC power cables published in Patent Publication No. 10-2022-0062747. It guides the collection of test samples for meaningful analysis while observing the deterioration progress of the cable during accelerated deterioration of the test cable, The purpose is to provide an accelerated deterioration monitoring system for HVDC power cables that reduces time and cost losses caused by the production of meaningless test samples for a certain period of time.
또한, 시험장소 내 장비를 간소화시킴으로써 시험을 위한 필요공간 및 장비 비용 문제점을 해결하는 HVDC 전력케이블의 가속열화 모니터링 시스템을 제공하는 것을 목적으로 한다.In addition, the purpose is to provide an accelerated deterioration monitoring system for HVDC power cables that solves the problems of space requirements and equipment costs for testing by simplifying equipment in the test site.
또한, 매 테스트 시간마다 테스트 시료 채취로 발생한 공백 공간에 새로운 케이블 고정 모듈을 삽입시키기 위하여 시험용 케이블을 나선시키고, 외부 반도전층을 탈피시키는 등의 노력과 준비 시간이 낭비되는 문제점을 해결하는 HVDC 전력케이블의 가속열화 모니터링 시스템을 제공하는 것을 목적으로 한다In addition, it is an HVDC power cable that solves the problem of wasting effort and preparation time, such as spiraling the test cable and stripping the external semiconducting layer to insert a new cable fixing module into the empty space created by collecting test samples every test time. The purpose is to provide an accelerated deterioration monitoring system of
상기한 목적을 달성하기 위하여 본 발명은 일정한 길이로 형성되며, 중심에 형성되는 동선, 상기 동선을 감싸는 내부 전도층, 상기 내부 전도층을 감싸는 절연체, 상기 절연체를 감싸는 외부 반도전층의 단면 구조를 가지고, 전체 단면 구조를 가지는 케이블 열화부; 상기 케이블 열화부 양단에 상기 외부 반도전층을 제거시켜 절연체를 노출시켜 형성되는 절연체부; 및 상기 절연체부 양단에 동선만 노출 형성시킨 동선부가 형성되는 시험용 케이블; 철심의 2차측에 형성된 절연원통에 상기 시험용 케이블의 케이블 열화부를 권선시키고, 상기 철심의 1차측에 1차측 코일을 권선시켜 형성되는 케이블 고정 모듈; 상기 시험용 케이블의 동선부에 연결되어 전기적 스트레스를 인가시키는 직류 고전압 인가모듈; 상기 1차측 코일에 전류를 공급하여 시험용 케이블에 열적 스트레스를 인가하는 유도 전류를 발생시키는 열용 전원공급부; 상기 시험용 케이블의 절연체부에 연결되어 접지시키는 제1 접지선로; 상기 시험용 케이블의 외부 반도전층에 연결되어 접지시키는 제2 접지선로; 상기 제2 접지선로에 형성되어 전류를 측정하는 전류계; 전체 장치를 제어시키는 제어 모듈; 상기 전류계와 직류 고전압 인가모듈의 정보를 수집, 가공, 연산하여 전도 전류를 연산하고 출력시키는 가속열화 모니터링 모듈을; 포함하여 구성되어 상기 시험용 케이블의 가속열화 중, 상기 시험용 케이블의 전도 전류 정보를 모니터링할 수 있는 것을 특징으로 하는 HVDC 전력케이블의 가속열화 모니터링 시스템을 기술적 요지로 한다.In order to achieve the above object, the present invention is formed at a certain length and has a cross-sectional structure of a copper wire formed at the center, an internal conductive layer surrounding the copper wire, an insulator surrounding the internal conductive layer, and an external semiconducting layer surrounding the insulator. , cable deterioration section having an overall cross-sectional structure; an insulator portion formed at both ends of the cable deterioration portion by removing the outer semiconducting layer to expose an insulator; and a test cable having a copper wire portion formed at both ends of the insulator portion with only the copper wire exposed. a cable fixing module formed by winding the cable deterioration portion of the test cable on an insulating cylinder formed on the secondary side of the iron core and winding the primary coil on the primary side of the iron core; A direct current high voltage application module connected to the copper wire portion of the test cable to apply electrical stress; A thermal power supply unit that supplies current to the primary coil to generate an induced current that applies thermal stress to the test cable; a first ground line connected to the insulator part of the test cable and grounded; a second ground line connected to the external semiconducting layer of the test cable and grounded; an ammeter formed on the second ground line to measure current; a control module that controls the entire device; an accelerated deterioration monitoring module that collects, processes, and calculates information from the ammeter and the DC high voltage application module to calculate and output conduction current; The technical gist is a monitoring system for accelerated deterioration of an HVDC power cable, which is configured to monitor conduction current information of the test cable during accelerated deterioration of the test cable.
또한, 상기 시험용 케이블에는 상기 제2 접지선로의 연결을 위하여 상기 외부 반도전층 외측에 접지전극용 금속 피복을 형성시킨 것을 특징으로 하는 HVDC 전력케이블의 가속열화 모니터링 시스템으로 되는 것이 바람직하다.In addition, it is preferable that the test cable be an accelerated deterioration monitoring system for an HVDC power cable, characterized in that a metal coating for a grounding electrode is formed on the outside of the external semiconducting layer for connection to the second grounding line.
또한, 상기 HVDC 전력케이블의 가속열화 모니터링 시스템은 상기 케이블 고정 모듈에 독립 설치되며, 철심의 2차측에 형성된 절연원통에 상기 시험용 케이블의 케이블 열화부를 권선시키고, 상기 철심의 1차측에 1차측 코일을 권선시키며, 상기 케이블 열화부의 온도 상태를 측정하여 상기 제어 모듈로 전달하는 온도센서를 포함하는 온도 감지 모듈;을 더 포함하여 구성되는 것을 특징으로 하는 HVDC 전력케이블의 가속열화 모니터링 시스템으로 되는 것이 바람직하다.In addition, the accelerated deterioration monitoring system of the HVDC power cable is installed independently on the cable fixing module, winds the cable deterioration part of the test cable on an insulating cylinder formed on the secondary side of the iron core, and installs a primary coil on the primary side of the iron core. It is preferable that the accelerated deterioration monitoring system of the HVDC power cable further comprises a temperature detection module that winds the cable and includes a temperature sensor that measures the temperature state of the deteriorated cable and transmits it to the control module. .
또한, 상기 시험용 케이블은 단위 테스트 길이로 n(n은 자연수)회 절단 가능한 길이로 형성되어 상기 시험용 케이블의 열화를 가속시키면서, 매 열화판정시점 도달시 상기 단위 테스트 길이만큼 절단하여, 전력 케이블의 열화상태 관찰용 시료를 생산하면서, 남은 시험용 케이블은 가속열화을 계속 진행시키는 것을 특징으로 하는 HVDC 전력케이블의 가속열화 모니터링 시스템으로 되는 것이 바람직하다.In addition, the test cable is formed to a length that can be cut n times (n is a natural number) as a unit test length, thereby accelerating the deterioration of the test cable, and is cut by the unit test length when each deterioration determination point is reached, thereby reducing the deterioration of the power cable. It is desirable to use an accelerated deterioration monitoring system for HVDC power cables, which is characterized in that the remaining test cables continue to undergo accelerated deterioration while producing samples for condition observation.
또한, 상기 케이블 고정 모듈은 철심의 일측에 형성된 절연원통에 시험용 케이블을 권선시키고, 상기 철심의 타측에 열원용 1차측 코일을 권선시킨 것으로서, 상기 시험용 케이블이 단위 테스트 길이를 가지는 단위 케이블 고정 모듈 m(m은 2 이상의 자연수)개로 형성되고, 각 단위 케이블 고정 모듈의 시험용 케이블은 폐루프형으로 직렬 연결시켜 형성되고, 전체 단위 케이블 고정 모듈의 1차측 코일은 1개 선로로 직렬 연결되어, 1개의 열용 전원공급부에 의해 전체 단위 케이블 고정 모듈의 1차측 코일에 전원을 공급하도록 형성되어 상기 시험용 케이블의 열화를 가속시켜, 매 열화판정시점 도달시 상기 단위 케이블 고정 모듈을 1개씩 분리하여, 전력 케이블의 열화상태 관찰용 시료를 생산하면서, 남은 단위 케이블 고정 모듈은 가속열화을 계속 진행시키는 것을 특징으로 하는 HVDC 전력케이블의 가속열화 모니터링 시스템으로 되는 것이 바람직하다.In addition, the cable fixing module is a unit cable fixing module in which a test cable is wound around an insulating cylinder formed on one side of the iron core, and a primary coil for a heat source is wound on the other side of the iron core, and the test cable has a unit test length m. (m is a natural number of 2 or more), and the test cable of each unit cable fixation module is formed by connecting in series in a closed loop, and the primary coil of the entire unit cable fixation module is connected in series with one line, It is formed to supply power to the primary coil of the entire unit cable fixing module by the thermal power supply unit, accelerating the deterioration of the test cable, and separating the unit cable fixing modules one by one when each deterioration judgment point is reached, thereby fixing the power cable. While producing samples for observing the deterioration state, it is desirable that the remaining unit cable fixing modules be used as an accelerated deterioration monitoring system for HVDC power cables, which is characterized in that accelerated deterioration continues.
또한, 상기 HVDC 전력케이블의 가속열화 모니터링 시스템은 철심과 1차측 코일없이 절연원통에만 권선되고, 다른 단위 케이블 고정 모듈의 시험용 케이블과 폐루프 직렬 연결되는 시험용 권선이 형성된 간소형 단위 케이블 고정 모듈을; 포함하여 구성되어 다른 단위 케이블 고정 모듈의 시험용 케이블에서 발생되는 유도 전류를 전달받아 시험용 케이블에 열적 스트레스를 인가시키는 것을 특징으로 하는 HVDC 전력케이블의 가속열화 모니터링 시스템으로 되는 것이 바람직하다.In addition, the accelerated deterioration monitoring system for the HVDC power cable includes a simple unit cable fixation module in which a test winding is wound only on an insulating cylinder without an iron core and a primary coil, and is connected in closed loop series with the test cable of another unit cable fixation module; It is desirable to have an accelerated deterioration monitoring system for HVDC power cables that is configured to receive induced current generated from the test cable of another unit cable fixing module and apply thermal stress to the test cable.
상기한 본 발명에 의하여, 시험용 케이블의 가속열화 시 케이블의 열화 진행 상태를 관찰하면서 유의미한 분석용 테스트 시료 채취를 할 수 있도록 안내하여, 일정 시간동안 무의미한 테스트 시료의 생산에 의한 시간적, 비용적 손실을 절감시키는 HVDC 전력케이블의 가속열화 모니터링 시스템이 제공되는 이점이 있다.According to the present invention described above, when a test cable undergoes accelerated deterioration, it guides the collection of test samples for meaningful analysis while observing the deterioration progress of the cable, thereby reducing time and cost losses due to the production of meaningless test samples for a certain period of time. There is an advantage in providing a monitoring system for accelerated deterioration of HVDC power cables, which reduces the cost.
또한, 시험장소 내 장비를 간소화시킴으로써 시험을 위한 필요공간 및 장비 비용 문제점을 해결하는 HVDC 전력케이블의 가속열화 모니터링 시스템이 제공되는 이점이 있다.In addition, there is an advantage in providing an accelerated deterioration monitoring system for HVDC power cables that solves the problems of space requirements and equipment costs for testing by simplifying the equipment in the test site.
또한, 매 테스트 시간마다 테스트 시료 채취로 발생한 공백 공간에 새로운 케이블 고정 모듈을 삽입시키기 위하여 시험용 케이블을 나선시키고, 외부 반도전층을 탈피시키는 등의 노력과 준비 시간이 낭비되는 문제점을 해결하는 HVDC 전력케이블의 가속열화 모니터링 시스템이 제공되는 이점이 있다.In addition, it is an HVDC power cable that solves the problem of wasting effort and preparation time, such as spiraling the test cable and stripping the external semiconducting layer to insert a new cable fixing module into the empty space created by collecting test samples every test time. There is an advantage in that an accelerated deterioration monitoring system is provided.
도 1은 선출원 발명 'HVDC 전력케이블의 가속열화 장치'의 가속열화 장치 구성도Figure 1 is a diagram of the accelerated deterioration device configuration of the earlier invention 'Accelerated deterioration device for HVDC power cable'
도 2는 도 1에 도시된 시험용 케이블의 단면도 및 외형도Figure 2 is a cross-sectional view and external view of the test cable shown in Figure 1
도 3은 도 1에 도시된 케이블 고정 모듈의 구성도Figure 3 is a configuration diagram of the cable fixing module shown in Figure 1
도 4는 도 1에 도시된 온도 감지 모듈의 구성도Figure 4 is a configuration diagram of the temperature sensing module shown in Figure 1
도 5는 시험용 케이블에서 테스트 시료의 생산 및 사용에 관한 설명도Figure 5 is an explanatory diagram of the production and use of test samples in test cables
도 6은 종래기술방식에서의 사용 상태도Figure 6 is a state diagram of use in the prior art method.
도 7은 본 발명의 기본 구성도Figure 7 is a basic configuration diagram of the present invention
도 8은 본 발명의 온도 감지 모듈의 구성도Figure 8 is a configuration diagram of the temperature sensing module of the present invention
도 9는 도 7에서 확장된 일실시예 구성도Figure 9 is a configuration diagram of an embodiment expanded from Figure 7
도 10와 도 11은 도 7에 의한 실시 설명도Figures 10 and 11 are diagrams illustrating the implementation of Figure 7
도 12은 도 7에서 확장된 또 다른 일실시예 구성도 Figure 12 is a configuration diagram of another embodiment expanded from Figure 7
이하 도면을 참조하여 본 발명에 관하여 살펴보기로 하며, 본 발명을 설명함에 있어서 관련된 공지기술 또는 구성에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우에는 그 상세한 설명은 생략할 것이다. The present invention will be reviewed below with reference to the drawings. In describing the present invention, if it is determined that a detailed description of related known technology or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. will be.
그리고 후술되는 용어들은 본 발명에서의 기능을 고려하여 정의된 용어들로서 이는 사용자, 운용자의 의도 또는 관례 등에 따라 달라질 수 있으므로 그 정의는 본 발명을 설명하는 본 명세서 전반에 걸친 내용을 토대로 내려져야 할 것이다. In addition, the terms described below are terms defined in consideration of the functions in the present invention, and may vary depending on the intention or custom of the user or operator, so the definitions should be made based on the content throughout the specification explaining the present invention.
이하의 도 1은 선출원 발명 'HVDC 전력케이블의 가속열화 장치'의 가속열화 장치 구성도이며, 도 2는 도 1에 도시된 시험용 케이블의 단면도 및 외형도이며, 도 3은 도 1에 도시된 케이블 고정 모듈의 구성도이며, 도 4는 도 1에 도시된 온도 감지 모듈의 구성도이며, 도 5는 시험용 케이블에서 테스트 시료의 생산 및 사용에 관한 설명도이며, 도 6은 종래기술방식에서의 사용 상태도이며, 도 7은 본 발명의 기본 구성도이며, 도 8은 본 발명의 온도 감지 모듈의 구성도이며, 도 9는 도 7에서 확장된 일실시예 구성도이며, 도 10와 도 11은 도 7에 의한 실시 설명도이며, 도 12은 도 7에서 확장된 또 다른 일실시예 구성도이다. The following Figure 1 is a diagram showing the configuration of an accelerated deterioration device of the earlier application invention 'Accelerated Deterioration Device for HVDC Power Cable', Figure 2 is a cross-sectional view and an external view of the test cable shown in Figure 1, and Figure 3 is a cable shown in Figure 1. Figure 4 is a block diagram of a fixed module, Figure 4 is a block diagram of the temperature sensing module shown in Figure 1, Figure 5 is an explanatory diagram of the production and use of a test sample in a test cable, and Figure 6 is a diagram of use in a prior art method. It is a state diagram, Figure 7 is a basic configuration diagram of the present invention, Figure 8 is a configuration diagram of the temperature detection module of the present invention, Figure 9 is an embodiment configuration diagram expanded from Figure 7, and Figures 10 and 11 are diagrams 7 is an implementation explanatory diagram, and FIG. 12 is a configuration diagram of another embodiment expanded from FIG. 7.
도면에 도시된 바와 같이 본 발명은 HVDC 전력케이블의 가속열화 모니터링 시스템에 관한 것으로서, 상기한 바와 같이 대한민국 공개특허 10-2022-0062747 'HVDC 전력케이블의 가속열화 장치' 에 대한 기술적 문제점을 개선하고 진보시킨 것이다.As shown in the drawing, the present invention relates to a monitoring system for accelerated deterioration of HVDC power cables. As described above, the present invention improves and improves the technical problems of 'Accelerated deterioration device for HVDC power cables' in Korean Patent Publication No. 10-2022-0062747. It was ordered.
따라서, 이하의 설명에서는 '발명의 배경이 되는 기술'에 기재한 바와 같이 대한민국 공개특허 10-2022-0062747 'HVDC 전력케이블의 가속열화 장치'의 기재 내용을 갈음하여 기재하고, 동일 도번으로 설명하여 기술 내용이 통일적으로 설명될 수 있게 한다.Therefore, in the following description, the contents of the Republic of Korea Patent Publication No. 10-2022-0062747 'Accelerated Deterioration Device for HVDC Power Cables' are replaced as described in 'Background Technology of the Invention', and are explained under the same drawing number. Enables technical content to be explained in a unified way.
도면에 도시된 바와 같이 본 발명은 철심(23), 절연원통(22), 시험용 케이블(10), 1차측 코일(24)로 형성되는 케이블 고정 모듈(20)과 열용 전원공급부(30); 제1 접지선로(130), 제2 접지선로(140), 전류계(200), 제어모듈(90), 가속열화 모니터링 모듈(900)을 포함하여 구성된다.As shown in the drawing, the present invention includes a cable fixing module 20 and a heat power supply unit 30 formed of an iron core 23, an insulating cylinder 22, a test cable 10, and a primary coil 24; It is comprised of a first ground line 130, a second ground line 140, an ammeter 200, a control module 90, and an accelerated deterioration monitoring module 900.
상기 케이블 고정 모듈(20)은 철심(23)의 2차측에 형성된 절연원통(22)에 시험용 케이블(10)을 권선시키고, 상기 철심(23)의 1차측에 열원용 1차측 코일(24)을 권선시켜 형성된다.The cable fixing module 20 winds the test cable 10 around an insulating cylinder 22 formed on the secondary side of the iron core 23, and installs a primary coil 24 for a heat source on the primary side of the iron core 23. It is formed by winding.
상기 케이블 고정 모듈은 대한민국 공개특허 10-2022-0062747 'HVDC 전력케이블의 가속열화 장치'에 기재된 케이블 고정 모듈(20)과 동일 장치이며, 이에 관한 상세한 설명은 '발명의 배경이 되는 기술'에 기재한 바와 같이 대한민국 공개특허 10-2022-0062747 'HVDC 전력케이블의 가속열화 장치'의 기재 내용으로 갈음하며, 동일 도번으로 설명하기로 한다.The cable fixing module is the same device as the cable fixing module 20 described in Korean Patent Publication No. 10-2022-0062747 ‘Accelerated deterioration device for HVDC power cables’, and a detailed description thereof is provided in ‘Technology behind the invention’. As mentioned above, the description in Korean Patent Publication No. 10-2022-0062747, 'Accelerated Deterioration Device for HVDC Power Cables' will be replaced and explained using the same drawing number.
따라서, 상기 케이블 고정 모듈(20)은 도 3에 도시된 바와 같이, 상기 시험용 케이블(10)에 열적인 스트레스 인가를 위한 변압부(21)와 상기 변압부(21)의 2차측에 배치되는 절연 원통(22)을 포함하여 구성된다.Therefore, as shown in FIG. 3, the cable fixing module 20 includes a transformer 21 for applying thermal stress to the test cable 10 and an insulation disposed on the secondary side of the transformer 21. It is composed of a cylinder (22).
상기 변압부(21)는 철심(23)과 상기 철심(23)의 일차측에 권선되는 1차측 코일(24)을 포함하고, 2차측에는 상기 절연 원통(22)이 배치되며, 상기 절연 원통(22)에는 상기 시험용 케이블(10) 중 케이블 열화부(14a)가 수회 권선되어 상기 변압부(21)의 2차측 코일 역할을 한다.The transformer 21 includes an iron core 23 and a primary coil 24 wound on the primary side of the iron core 23, and the insulating cylinder 22 is disposed on the secondary side, and the insulating cylinder ( In 22), the cable deterioration section 14a of the test cable 10 is wound several times and serves as a secondary coil of the transformer section 21.
상기 시험용 케이블(10) 역시 대한민국 공개특허 10-2022-0062747 'HVDC 전력케이블의 가속열화 장치'에 기재된 시험용 케이블(10)과 동일하며, 이에 관한 상세한 설명은 '발명의 배경이 되는 기술'에 기재한 바와 같이 대한민국 공개특허 10-2022-0062747 'HVDC 전력케이블의 가속열화 장치'의 기재 내용으로 갈음하며, 동일 도번으로 설명하기로 한다.The test cable (10) is also the same as the test cable (10) described in Korean Patent Publication No. 10-2022-0062747, ‘Accelerated Deterioration Device for HVDC Power Cables’, and detailed description thereof is provided in ‘Background Technology of the Invention’. As mentioned above, the description in Korean Patent Publication No. 10-2022-0062747, 'Accelerated Deterioration Device for HVDC Power Cables' will be replaced and explained using the same drawing number.
이에 따르면, 상기 시험용 케이블(10)의 내부 구조는 도 2a에 도시된 바와 같이, 중앙에 동재질의 원형 단면의 동선(11)이 위치하고, 상기 동선(11)을 둘러싸는 내부 반도전층(12)과 상기 내부 반도전층(12)을 둘러싸는 절연체(13)와 상기 절연체(13)를 둘러싸는 외부 반도전층(14)을 포함한다. According to this, the internal structure of the test cable 10 is, as shown in Figure 2a, a copper wire 11 of a circular cross-section made of copper is located in the center, and an internal semiconducting layer 12 surrounding the copper wire 11 and an insulator 13 surrounding the inner semiconducting layer 12 and an outer semiconducting layer 14 surrounding the insulator 13.
상기 시험용 케이블(10)은 XLPE 절연 전력 케이블을 포함하는 플라스틱 절연 전력케이블이 모두 적용할 수 있음은 자명하다 할 것이다.It will be apparent that all plastic insulated power cables, including XLPE insulated power cables, can be applied to the test cable 10.
상기 시험용 케이블(10)은 외부 반도전층(14)을 둘러싸는 금속시스와 금속시스를 둘러싸는 합성수지 재질의 방식층을 추가로 포함할 수 있다.The test cable 10 may further include a metal sheath surrounding the external semiconducting layer 14 and an anti-corrosion layer made of synthetic resin surrounding the metal sheath.
또한, 직류 고전압 인가모듈(40) 및 상기 1차측 코일(24)에 전원을 공급하는 열용 전원공급부(30) 역시 이에 관한 상세한 설명은 '발명의 배경이 되는 기술'에 기재한 바와 같이 대한민국 공개특허 10-2022-0062747 'HVDC 전력케이블의 가속열화 장치'의 기재 내용으로 갈음하며, 동일 도번으로 설명하기로 한다.In addition, the thermal power supply unit 30 that supplies power to the direct current high voltage application module 40 and the primary coil 24 is also described in the Korean published patent, as described in 'Background technology of the invention'. 10-2022-0062747 This will be replaced with the description of ‘Accelerated deterioration device for HVDC power cable’ and will be explained using the same drawing number.
이에 따르면, 상기 1차측 코일(24)에는 도 7에서 보여지는 바와 같이 상기 2차측 코일인 케이블 열화부(14a)에 열을 인가하기 위하여 열용 전원 공급부(30)를 통하여 전원이 인가된다.According to this, power is applied to the primary coil 24 through the thermal power supply unit 30 to apply heat to the cable deterioration part 14a, which is the secondary coil, as shown in FIG. 7.
상기 1차측 코일(24)에 상기 열용 전원 공급부(30)를 통하여 전원이 인가되면, 상기 2차측에 코일로 권선된 케이블 열화부(14a)에 유도 전류를 발생시켜 도체 저항에 의한 줄열로 열이 발생되게 하여 시험용 케이블(10)에 열적 스트레스를 인가한다.When power is applied to the primary coil 24 through the heat power supply unit 30, an induced current is generated in the cable deterioration part 14a wound as a coil on the secondary side, thereby generating heat due to Joule heat due to conductor resistance. Thermal stress is applied to the test cable (10) by causing it to be generated.
한편, 직류 고전압 인가모듈(40)은 도 7에 도시된 바와 같이, 고전압의 직류를 상기 시험용 케이블(10)의 동선부(11a)에 인가하는 기능을 수행하는 구성으로서, 시험용 케이블(10)에 전기적 스트레스를 인가한다. Meanwhile, as shown in FIG. 7, the direct current high voltage application module 40 is a component that performs the function of applying high voltage direct current to the copper wire portion 11a of the test cable 10, and is applied to the test cable 10. Apply electrical stress.
본 발명의 제1 접지선로(130)는 도 7에서 보여지는 바와 같이 상기 시험용 케이블(10)의 절연체부(13a)에 연결되어 접지시키는 선로이며, 제2 접지선로(140)는 상기 시험용 케이블(10)의 외부 반도전층(14)에 연결되어 접지시키는 선로이다.The first ground line 130 of the present invention is a line connected to the insulator portion 13a of the test cable 10 to ground the test cable 10, as shown in Figure 7, and the second ground line 140 is the test cable ( It is a line connected to the external semiconducting layer 14 of 10) and grounded.
본 발명은 상기 제2 접지선로(140)에 형성되어 시험용 케이블의 전도 전류를 측정하는 전류계(200)를 더 포함하여 구성되어, 이에 의해 상기 시험용 케이블(10)의 가속열화 중에 상기 제2 접지선로(140)를 통해 흐르는 전류 정보를 모니터링할 수 있게 되는 특징이 있다.The present invention further includes an ammeter 200 formed on the second ground line 140 to measure the conduction current of the test cable, whereby the second ground line 100 is connected during accelerated deterioration of the test cable 10. It has the feature of being able to monitor current information flowing through (140).
본 발명의 가속열화 모니터링 모듈(900)은 상기 전류계(200)의 측정 정보와 직류 고전압 인가모듈(40)의 출력정보를 수집, 가공, 연산하여 시험용 케이블의 열화 정보를 알 수 있는 전도 전류를 연산하고 출력시키는 회로부이다.The accelerated deterioration monitoring module 900 of the present invention collects, processes, and calculates the measurement information of the ammeter 200 and the output information of the DC high voltage application module 40 to calculate a conduction current that can determine the deterioration information of the test cable. This is the circuit part that outputs the output.
즉, 상기 전류계(200)에서 획득되는 정보는 내부 동선에서 절연체(13) 또는 외부 반도전층(14)으로 흐르는 전도 전류가 되므로 상기 가속열화 모니터링 모듈(900)에서는 시간에 따라 인가되는 직류 고전압과 전도 전류량의 변화를 관찰할 수 있으며, 이는 시험용 케이블(10)의 시간에 따른 열화상태를 관찰하는 것이 되므로, 시험용 케이블(10)로 테스트 시료를 생산해야 하는 시점을 지시하는 정보로 활용할 수 있게 된다.That is, since the information obtained from the ammeter 200 is a conduction current flowing from the internal copper wire to the insulator 13 or the external semiconducting layer 14, the accelerated deterioration monitoring module 900 uses a direct current high voltage and conduction voltage applied over time. Changes in the amount of current can be observed, and since this means observing the deterioration state of the test cable 10 over time, it can be used as information indicating when to produce a test sample with the test cable 10.
따라서, 미리 상기 가속열화 모니터링 모듈(900)에는 테스트 시료를 생산해야 하는 전도 전류량 또는 열화상태 정보를 저장해두고, 시험용 케이블(10)의 열화 상태가 이에 도달되면 테스트 시료의 생산 시점으로 정보를 출력시키게 하는 것이 바람직하다.Therefore, the accelerated deterioration monitoring module 900 stores in advance the amount of conduction current or deterioration state information required to produce the test sample, and outputs the information at the time of production of the test sample when the deterioration state of the test cable 10 reaches this level. It is desirable to do so.
이와 같이, 본 발명은 대한민국 공개특허 10-2022-0062747 'HVDC 전력케이블의 가속열화 장치'와 달리 상기 시험용 케이블에 전기적, 물리적, 열적 스트레스를 인가시키는 중에, 전도 전류 정보를 직접적으로 모니터링할 수 있는 특징이 있다.As such, the present invention, unlike the Korean Patent Publication No. 10-2022-0062747 'Accelerated deterioration device for HVDC power cables', is a device that can directly monitor conduction current information while applying electrical, physical, and thermal stress to the test cable. There is a characteristic.
즉, 본 발명은 시험용 케이블(10)의 열화 정도를 관찰하고 이에 연동하여 매 테스트 시료의 생산 시점을 안내하는 장치가 되는 이점이 있다.In other words, the present invention has the advantage of being a device that observes the degree of deterioration of the test cable 10 and guides the production time of each test sample in conjunction with this.
이에 대하여 좀 더 구체적으로 살펴보면, 선출원된 도 1의 'HVDC 전력케이블의 가속열화 장치(100)'의 경우, 미리 정해진 테스트 시간이 되면 시험용 케이블(10)의 열화 정도에 대한 정보를 알지 못하는 상태임에도 불구하고 시험용 케이블(10)을 분리시켜 가속열화 상태를 관찰하는 테스트 시료를 생산해야 하는 문제점이 있었다.Looking at this in more detail, in the case of the previously filed 'HVDC power cable accelerated deterioration device 100' of FIG. 1, even though information about the degree of deterioration of the test cable 10 is not known when the predetermined test time comes, However, there was a problem in that the test cable 10 had to be separated to produce a test sample to observe the accelerated deterioration state.
이에 따라, 실제 초기 테스트 시간에는 열화가 충분하게 진행되지 않은 테스트 시료가 제작되어 무의미한 시험으로 인한 비용과 노력의 낭비를 초래하는 문제점이 있었는데, 본 발명에 의하면 열화가 충분하게 유의미하게 진행된 시점을 관찰하면서 테스트 시료를 제작할 수 있으므로 이러한 문제점을 해결할 수 있는 이점이 있다.Accordingly, during the actual initial test time, there was a problem in that test samples were produced in which deterioration had not sufficiently progressed, resulting in waste of cost and effort due to meaningless testing. However, according to the present invention, the point in time when deterioration had progressed sufficiently and significantly was observed. There is an advantage in solving these problems because test samples can be produced while doing so.
본 발명의 상기 시험용 케이블(10)에는 상기 제2 접지선로(140)의 연결을 위하여 상기 외부 반도전층(14) 외측에 접지전극용 금속 피복을 형성시키는 것을 고려할 수 있다.In the test cable 10 of the present invention, it may be considered to form a metal coating for a ground electrode on the outside of the external semiconducting layer 14 for connection to the second ground line 140.
상기 금속 피복은 시험용 케이블(10)의 외부 반도전층(14)을 둘러싸는 금속시스를 이용할 수 있음은 물론이다.Of course, the metal sheath surrounding the outer semiconducting layer 14 of the test cable 10 can be used as the metal sheath.
한편, 선출원된 HVDC 전력케이블의 가속열화 장치(100)의 경우, 시험용 케이블(10)의 온도를 추정하고, 상기 1차측 코일(65)의 입력 정보를 얻기 위한 레퍼런스 테스트 모듈로서 온도 감지 모듈(60)이 병설되어 있다.Meanwhile, in the case of the previously applied HVDC power cable accelerated deterioration device 100, a temperature detection module 60 is used as a reference test module to estimate the temperature of the test cable 10 and obtain input information of the primary coil 65. ) is attached.
본 발명에서도 도 8에서 보여지는 바와 같이 온도센서(660)가 포함된 온도 감지 모듈(60)이 병설되고, 동일 기능을 수행하고 있다.In the present invention, as shown in FIG. 8, a temperature sensing module 60 including a temperature sensor 660 is installed in parallel and performs the same function.
상기 온도 감지 모듈(60)의 구조 역시 대한민국 공개특허 10-2022-0062747 'HVDC 전력케이블의 가속열화 장치'에 기재된 온도 감지 모듈(60)과 대부분 동일하므로, 이에 관한 상세한 설명은 '발명의 배경이 되는 기술'에 기재한 바와 같이 대한민국 공개특허 10-2022-0062747 'HVDC 전력케이블의 가속열화 장치'의 기재 내용으로 갈음하고, 동일 도번으로 설명하기로 한다.The structure of the temperature sensing module 60 is also largely the same as the temperature sensing module 60 described in Korean Patent Publication No. 10-2022-0062747 'Accelerated Deterioration Apparatus for HVDC Power Cables', and a detailed description thereof is provided in 'Background of the Invention'. As described in 'Technology', it will be replaced with the description in Republic of Korea Patent Publication No. 10-2022-0062747 'Accelerated deterioration device for HVDC power cable', and will be explained with the same drawing number.
이에 따르면, 도 8에서 보여지는 바와 같이 온도 감지 모듈(60)은 철심(63)의 2차측에 형성된 절연원통(62)에 상기 시험용 케이블(10)의 케이블 열화부(14a)를 권선시키고, 상기 철심(23)의 1차측에 1차측 코일(64)을 권선시킨다.According to this, as shown in FIG. 8, the temperature sensing module 60 winds the cable deterioration portion 14a of the test cable 10 around the insulating cylinder 62 formed on the secondary side of the iron core 63, and the The primary coil 64 is wound on the primary side of the iron core 23.
다만, 본 발명의 상기 온도센서(660)는 종래기술방식과 달리 상기 케이블 열화부(14a) 내의 도체 온도 상태를 측정하기 위하여, 상기 케이블 열화부(14a)에서 동선(11)까지 절연부를 천공하고 동선(11)에 접촉이여 동선(11)의 온도를 측정하는 차이점이 있다.However, unlike the conventional method, the temperature sensor 660 of the present invention perforates the insulation from the cable deterioration section 14a to the copper wire 11 in order to measure the temperature state of the conductor within the cable deterioration section 14a. There is a difference in that the temperature of the copper wire 11 is measured by contacting the copper wire 11.
상기 온도센서(660)의 측정 온도 정보는 제어 모듈(90)로 전달된다.The measured temperature information of the temperature sensor 660 is transmitted to the control module 90.
본 발명의 제어 모듈(90)은 장치 전체를 제어하는 장치로서, 직류 고전압 인가모듈(40)의 출력제어, 상기 온도센서(66)의 온도 정보를 입력받아 상기 열용 전원공급부(30)의 출력을 제어하게 된다.The control module 90 of the present invention is a device that controls the entire device, and controls the output of the DC high voltage application module 40, receives temperature information from the temperature sensor 66, and outputs the thermal power supply unit 30. takes control.
그런데, 본 발명의 경우, 상기한 바와 같이 상기 전류계(200)를 통하여 전도 전류를 모니터링하고 있으므로, 이와 동시에 측정되는 온도 정보는 매우 유의미한 특징으로 가지게 되므로 상기 가속열화 모니터링 모듈(900)로 전달되게 하는 것이 바람직하다.However, in the case of the present invention, since the conduction current is monitored through the ammeter 200 as described above, the temperature information measured at the same time has a very significant feature and is transmitted to the accelerated deterioration monitoring module 900. It is desirable.
즉, 본 발명에서 상기 제어모듈(90)로 수집되는 온도 정보는 상기 1차측 코일 입력 정보로서 활용될 뿐만 아니라, 직류 고전압 입력 정보와 전도 전류량, 시간, 온도 데이터가 함께 상호 연관있는 전기적 물리 정보로서 활용될 수 있으므로 상기 가속열화 모니터링 모듈(900)로 전달되게 하는 것이 바람직하다.That is, in the present invention, the temperature information collected by the control module 90 is not only used as the primary coil input information, but also as electrical physical information in which DC high voltage input information, conduction current amount, time, and temperature data are interrelated. Since it can be utilized, it is desirable to transmit it to the accelerated deterioration monitoring module 900.
또한, 상기 제어 모듈(90)과 가속열화 모니터링 모듈(900)은 본 발명의 설명을 위하여 구분하고 있으나, 실제에 있어서는 하나의 장치로 형성될 수 있음은 물론이다.In addition, the control module 90 and the accelerated deterioration monitoring module 900 are separated for the purpose of explaining the present invention, but in reality, of course, they can be formed as one device.
한편, 본 발명은 상기 시험용 케이블(10)을 도 9 내지 도 11에서 보여지는 바와 같이 단위 테스트 길이로 n(n은 자연수)회 절단 가능한 길이의 시험용 케이블로 형성할 수 있다. Meanwhile, in the present invention, the test cable 10 can be formed as a test cable with a length that can be cut n (n is a natural number) times as a unit test length, as shown in FIGS. 9 to 11.
도 10와 도 11에서 10(n)은 단위 테스트 길이로 n(n은 자연수)회 절단 가능한 길이의 시험용 케이블이며, 10(x)는 단위 테스트 길이의 시험용 케이블이며, 10(n-x)는 10(n)에서 10(x)를 절단한 길이의 시험용 케이블이다.10 and 11, 10(n) is a test cable with a unit test length that can be cut n (n is a natural number) times, 10(x) is a test cable with a unit test length, and 10(n-x) is 10( This is a test cable with a length of 10(x) cut from n).
이와 같이 구성되는 본 발명에 의하면, 도 9에서 보여지는 바와 같이 상기 시험용 케이블(10)의 열화를 가속시키면서, 매 열화판정시점 도달시 도 11에서 보여지는 바와 같이 상기 단위 테스트 길이만큼 절단하여, 전력 케이블의 열화상태 관찰용 테스트 시료를 생산하면서, 남은 시험용 케이블(n-x)의 절단부에 동선부(11a)와 절연체부(13a)를 형성시키고, 가속열화를 계속 진행시켜 열화 이력이 누적되게 할 수 있게 된다.According to the present invention configured in this way, as shown in FIG. 9, the deterioration of the test cable 10 is accelerated, and when each deterioration determination point is reached, the unit test length is cut as shown in FIG. 11, thereby reducing the power. While producing a test sample for observing the deterioration state of the cable, a copper wire portion (11a) and an insulator portion (13a) are formed on the cut portion of the remaining test cable (n-x), and accelerated deterioration continues to allow the deterioration history to accumulate. do.
도 1의 선출원된 HVDC 전력케이블의 가속열화 장치(100)의 경우, 도 6에서 보여지는 바와 같이 복수 개의 장치를 1조로 하여 열화를 진행하고, 매 테스트 시간마다 하나씩 분리하여 테스트 시료를 생산함에 따라, 각 HVDC 전력케이블의 가속열화 장치의 수, 즉, 시료 수만큼 독립적인 열용 전원공급부(30)가 추가로 필요하게 되어, 시험 장소 내의 장비가 복잡해지고, 시험을 위한 필요공간이 증가되며 장비 비용이 높아지는 문제점이 있었다.In the case of the previously applied HVDC power cable accelerated deterioration device 100 of FIG. 1, as shown in FIG. 6, deterioration is performed using a plurality of devices as a set, and test samples are produced by separating them one by one at each test time. , the number of accelerated deterioration devices for each HVDC power cable, that is, the number of samples, requires an additional independent thermal power supply unit 30, making the equipment in the test site complex, the space required for testing increases, and equipment costs. There was this growing problem.
그런데, 본 발명과 같이 상기 시험용 케이블(10)을 도 10에서 보여지는 바와 같이 단위 테스트 길이로 n(n은 자연수)회 절단 가능한 길이의 시험용 케이블(10)로 형성시키면, n회 테스트 시료를 생산할 수 있으면서도 도 9에서 보여지는 바와 같이 1개의 열용 전원공급부(30)만 사용되는 이점이 있다.However, as in the present invention, if the test cable 10 is formed into a test cable 10 with a length that can be cut n times (n is a natural number) as a unit test length as shown in FIG. 10, test samples can be produced n times. However, as shown in FIG. 9, there is an advantage in that only one thermal power supply unit 30 is used.
또한, 이와 같은 이점에 의하여, 시험 장소 내의 장비가 간편해지고, 시험을 위한 필요공간이 절약되며 장비 비용이 현격하게 낮아지는 이점이 있다.Additionally, due to these advantages, equipment within the test site is simplified, space required for testing is saved, and equipment costs are significantly lowered.
이와 같은 이점은 또한, 종래기술방식처럼 매 테스트 시료를 생산할 때마다 제거되는 케이블 고정 모듈(20)에 의해 이에 사용되던 열용 전원공급부(30)를 불용 장비로 낭비하지 않기 위하여 새로운 케이블 고정 모듈(20)을 조립하여 추가시킬 필요가 없게하므로, 테스트 시간과 노력을 크게 절감시킬 수 있게 되는 이점을 가져오게 된다.This advantage is also achieved by using a new cable fixing module (20) in order to avoid wasting the thermal power supply unit (30) used as unused equipment by the cable fixing module (20), which is removed every time a test sample is produced, as in the prior art. ), there is no need to assemble and add additional parts, which has the advantage of greatly reducing test time and effort.
본 발명은 또한, 상기 시험용 케이블(10)을 도 12에서 보여지는 바와 같이 단위 테스트 길이를 가지는 단위 케이블 고정 모듈 m(m은 2 이상의 자연수)개로 형성시키고, 각 단위 케이블 고정 모듈(20)의 시험용 케이블은 폐루프형으로 직렬 연결시켜 형성시킬 수도 있다.In addition, the present invention is to form the test cable 10 into m unit cable fixing modules (m is a natural number of 2 or more) having a unit test length as shown in FIG. 12, and to test each unit cable fixing module 20. Cables can also be formed by connecting them in series in a closed loop.
이때, 본 발명은 도 12에서 보여지는 바와 같이 전체 단위 케이블 고정 모듈의 1차측 코일은 1개 선로로 직렬 연결되어, 1개의 열용 전원공급부에 의해 전체 단위 케이블 고정 모듈의 1차측 코일에 전원을 공급하도록 형성되게 하는 특징이 있다.At this time, in the present invention, as shown in Figure 12, the primary coil of the entire unit cable fixing module is connected in series with one line, and power is supplied to the primary coil of the entire unit cable fixing module by one heat power supply unit. There are characteristics that allow it to be formed.
이러한 경우에도 마찬가지로, m+1회 테스트 시료를 생산할 수 있으면서도 1개의 직류 고전압 인가모듈(40)과 열용 전원 공급부(30)만 사용되므로, 시험 장소 내의 장비가 간편해지고, 시험을 위한 필요공간이 절약되며 장비 비용이 현격하게 낮아지는 이점이 있다.Likewise, in this case, test samples can be produced m+1 times, but only one DC high voltage application module (40) and thermal power supply unit (30) are used, simplifying the equipment in the test site and saving the space required for testing. This has the advantage of significantly lowering equipment costs.
또한, 이에 의하면 매 테스트 시료를 생산하여도 불용 장비로 남는 열용 전원 공급부(20)가 발생되지 않으므로 새로운 케이블 고정 모듈(20)을 조립하여 추가시킬 필요가 없어져, 테스트 시간과 노력을 크게 절감시킬 수 있게 된다.In addition, according to this, even if each test sample is produced, the thermal power supply unit 20 does not remain as unused equipment, so there is no need to assemble and add a new cable fixing module 20, which can greatly reduce test time and effort. There will be.
한편, 도 12에서 보여지는 바와 같이 본 발명은 철심과 1차측 코일없이 절연원통에만 권선되고, 다른 단위 케이블 고정 모듈의 시험용 케이블과 폐루프 직렬 연결되는 시험용 권선이 형성된 간소형 단위 케이블 고정 모듈(20-1)을 포함하여 구성된다.On the other hand, as shown in Figure 12, the present invention is a simple unit cable fixing module (20) formed with a test winding that is wound only on an insulating cylinder without an iron core and a primary coil, and is connected in closed loop series with the test cable of another unit cable fixation module. It consists of -1).
상기 간소형 단위 케이블 고정 모듈(20-1)의 시험용 케이블(10-1)은 다른 단위 케이블 고정 모듈의 시험용 케이블(10)과 직렬 연결되므로, 다른 단위 케이블 고정 모듈의 시험용 케이블(10)에서 발생되는 유도 전류가 그대로 전달되어 간소형 단위 케이블 고정 모듈(20-1)의 시험용 케이블(10-1)에도 열적 스트레스를 인가시킬 수 있게 된다.Since the test cable 10-1 of the simple unit cable fixation module 20-1 is connected in series with the test cable 10 of another unit cable fixation module, the test cable 10 of the other unit cable fixation module The induced current is transmitted as is, making it possible to apply thermal stress to the test cable (10-1) of the simple unit cable fixing module (20-1).
따라서, 이와 같은 간소형 단위 케이블 고정 모듈(20-1)은 장치를 간소화시키는 이점이 있다.Therefore, this simple unit cable fixing module 20-1 has the advantage of simplifying the device.
이상 설명한 본 발명에 의하면 선출원된 HVDC 전력케이블의 가속열화 장치(100)의 개발 중 발견되는 기술적 문제점을 해결하면서, 그 해결 원리에 의하여 테스트 시료 제작 환경이 새롭게 진화되게 하고, 더 정확한 전력케이블 열화에 대한 물리적 정보를 획득할 수 있게 하는 시너지 효과가 발생되고, 시간과 공간, 노력, 비용의 절감을 크게 가져오는 장치가 제공된다.According to the present invention described above, while solving the technical problems discovered during the development of the previously applied HVDC power cable accelerated deterioration device 100, the test sample production environment is newly evolved by the solution principle, and more accurate power cable deterioration is achieved. A synergy effect is created that allows the acquisition of physical information about the device, and a device is provided that significantly reduces time, space, effort, and cost.
이상 본 발명의 설명을 위하여 도시된 도면은 본 발명이 구체화되는 하나의 실시예로서 도면에 도시된 바와 같이 본 발명의 요지가 실현되기 위하여 다양한 형태의 조합이 가능함을 알 수 있다.The drawings shown above for explanation of the present invention are one embodiment of the present invention, and as shown in the drawings, it can be seen that various types of combinations are possible to realize the gist of the present invention.
따라서 본 발명은 상기한 실시예에 한정되지 않고, 이하의 특허청구범위에서 청구하는 바와 같이 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변경실시가 가능한 범위까지 본 발명의 기술적 정신이 있다고 할 것이다. Therefore, the present invention is not limited to the above-described embodiments, and as claimed in the following claims, anyone skilled in the art can make various changes without departing from the gist of the invention. It will be said that the technical spirit of the present invention exists to the extent possible.

Claims (6)

  1. 일정한 길이로 형성되며, 중심에 형성되는 동선, 상기 동선을 감싸는 내부 전도층, 상기 내부 전도층을 감싸는 절연체, 상기 절연체를 감싸는 외부 반도전층의 단면 구조를 가지고, 전체 단면 구조를 가지는 케이블 열화부; 상기 케이블 열화부 양단에 상기 외부 반도전층을 제거시켜 절연체를 노출시켜 형성되는 절연체부; 및 상기 절연체부 양단에 동선만 노출 형성시킨 동선부가 형성되는 시험용 케이블;A cable deterioration portion formed at a certain length and having a cross-sectional structure of a copper wire formed at the center, an internal conductive layer surrounding the copper wire, an insulator surrounding the internal conductive layer, and an external semiconducting layer surrounding the insulator, and having an overall cross-sectional structure; an insulator portion formed at both ends of the cable deterioration portion by removing the outer semiconducting layer to expose an insulator; and a test cable having a copper wire portion formed at both ends of the insulator portion with only the copper wire exposed.
    철심의 2차측에 형성된 절연원통에 상기 시험용 케이블의 케이블 열화부를 권선시키고, 상기 철심의 1차측에 1차측 코일을 권선시켜 형성되는 케이블 고정 모듈; a cable fixing module formed by winding the cable deterioration portion of the test cable on an insulating cylinder formed on the secondary side of the iron core and winding the primary coil on the primary side of the iron core;
    상기 시험용 케이블의 동선부에 연결되어 전기적 스트레스를 인가시키는 직류 고전압 인가모듈; A direct current high voltage application module connected to the copper wire portion of the test cable to apply electrical stress;
    상기 1차측 코일에 전류를 공급하여 시험용 케이블에 열적 스트레스를 인가하는 유도 전류를 발생시키는 열용 전원공급부;A thermal power supply unit that supplies current to the primary coil to generate an induced current that applies thermal stress to the test cable;
    상기 시험용 케이블의 절연체부에 연결되어 접지시키는 제1 접지선로;a first ground line connected to the insulator part of the test cable and grounded;
    상기 시험용 케이블의 외부 반도전층에 연결되어 접지시키는 제2 접지선로;a second ground line connected to the external semiconducting layer of the test cable and grounded;
    상기 제2 접지선로에 형성되어 전류를 측정하는 전류계 ;an ammeter formed on the second ground line to measure current;
    전체 장치를 제어시키는 제어 모듈;a control module that controls the entire device;
    상기 전류계와 직류 고전압 인가모듈의 정보를 수집, 가공, 연산하여 전도 전류를 연산하고 출력시키는 가속열화 모니터링 모듈을;an accelerated deterioration monitoring module that collects, processes, and calculates information from the ammeter and the DC high voltage application module to calculate and output conduction current;
    포함하여 구성되어consists of including
    상기 시험용 케이블의 가속열화 중, 상기 시험용 케이블의 전도 전류 정보를 모니터링할 수 있는 것을 특징으로 하는 HVDC 전력케이블의 가속열화 모니터링 시스템.An accelerated deterioration monitoring system for an HVDC power cable, characterized in that it can monitor conduction current information of the test cable during accelerated deterioration of the test cable.
  2. 제1항에 있어서 상기 시험용 케이블에는According to claim 1, the test cable includes
    상기 제2 접지선로의 연결을 위하여For connection of the second ground line
    상기 외부 반도전층 외측에 접지전극용 금속 피복을 형성시킨 것을 특징으로 하는 HVDC 전력케이블의 가속열화 모니터링 시스템.An accelerated deterioration monitoring system for an HVDC power cable, characterized in that a metal coating for a ground electrode is formed on the outside of the external semiconducting layer.
  3. 제1항에 있어서, 상기 HVDC 전력케이블의 가속열화 모니터링 시스템은The method of claim 1, wherein the HVDC power cable accelerated deterioration monitoring system
    상기 케이블 고정 모듈에 독립 설치되며, It is installed independently on the cable fixing module,
    철심의 2차측에 형성된 절연원통에 상기 시험용 케이블의 케이블 열화부를 권선시키고, 상기 철심의 1차측에 1차측 코일을 권선시키며, 상기 케이블 열화부의 온도 상태를 측정하여 상기 제어 모듈로 전달하는 온도센서를 포함하는 온도 감지 모듈;을 The cable deterioration part of the test cable is wound on the insulating cylinder formed on the secondary side of the iron core, the primary coil is wound on the primary side of the iron core, and a temperature sensor is installed to measure the temperature state of the cable deterioration part and transmit it to the control module. including a temperature sensing module;
    더 포함하여 구성되는 것을 특징으로 하는 HVDC 전력케이블의 가속열화 모니터링 시스템.An accelerated deterioration monitoring system for HVDC power cables, comprising:
  4. 제1항에 있어서 In paragraph 1
    상기 시험용 케이블은 단위 테스트 길이로 n(n은 자연수)회 절단 가능한 길이로 형성되어The test cable is formed to a length that can be cut n (n is a natural number) times as a unit test length.
    상기 시험용 케이블의 열화를 가속시키면서, 매 열화판정시점 도달시 상기 단위 테스트 길이만큼 절단하여, 전력 케이블의 열화상태 관찰용 시료를 생산하면서, 남은 시험용 케이블은 가속열화을 계속 진행시키는 것을 특징으로 하는 HVDC 전력케이블의 가속열화 모니터링 시스템.HVDC power, characterized in that, while accelerating the deterioration of the test cable, the unit test length is cut when each deterioration judgment point is reached, and a sample for observing the deterioration state of the power cable is produced, while the remaining test cable continues to undergo accelerated deterioration. Cable accelerated deterioration monitoring system.
  5. 제1항에 있어서In paragraph 1
    상기 케이블 고정 모듈은The cable fixing module is
    철심의 일측에 형성된 절연원통에 시험용 케이블을 권선시키고, 상기 철심의 타측에 열원용 1차측 코일을 권선시킨 것으로서, 상기 시험용 케이블이 단위 테스트 길이를 가지는 단위 케이블 고정 모듈 m(m은 2 이상의 자연수)개로 형성되고, A test cable is wound on an insulating cylinder formed on one side of an iron core, and a primary coil for a heat source is wound on the other side of the iron core, wherein the test cable is a unit cable fixing module having a unit test length m (m is a natural number of 2 or more) Formed as a dog,
    각 단위 케이블 고정 모듈의 시험용 케이블은 폐루프형으로 직렬 연결시켜 형성되고,The test cable of each unit cable fixing module is formed by connecting in series in a closed loop.
    전체 단위 케이블 고정 모듈의 1차측 코일은 1개 선로로 직렬 연결되어, 1개의 열용 전원공급부에 의해 전체 단위 케이블 고정 모듈의 1차측 코일에 전원을 공급하도록 형성되어 The primary coil of the entire unit cable fixing module is connected in series with one line, and is configured to supply power to the primary coil of the entire unit cable fixing module by one heat power supply unit.
    상기 시험용 케이블의 열화를 가속시켜, 매 열화판정시점 도달시 상기 단위 케이블 고정 모듈을 1개씩 분리하여, 전력 케이블의 열화상태 관찰용 시료를 생산하면서, 남은 단위 케이블 고정 모듈은 가속열화을 계속 진행시키는 것을 특징으로 하는 HVDC 전력케이블의 가속열화 모니터링 시스템.By accelerating the deterioration of the test cable, the unit cable fixing modules are separated one by one when each deterioration judgment point is reached, and a sample for observing the deterioration state of the power cable is produced while the remaining unit cable fixing modules continue to undergo accelerated deterioration. A monitoring system for accelerated deterioration of HVDC power cables.
  6. 제5항에 있어서 상기 HVDC 전력케이블의 가속열화 모니터링 시스템은According to claim 5, the accelerated deterioration monitoring system of the HVDC power cable is
    철심과 1차측 코일없이 절연원통에만 권선되고, 다른 단위 케이블 고정 모듈의 시험용 케이블과 폐루프 직렬 연결되는 시험용 권선이 형성된 간소형 단위 케이블 고정 모듈을; A simple unit cable fixation module is formed with a test winding that is wound only on an insulating cylinder without an iron core and a primary coil, and is connected in closed loop series with the test cable of another unit cable fixation module;
    포함하여 구성되어consists of including
    다른 단위 케이블 고정 모듈의 시험용 케이블에서 발생되는 유도 전류를 전달받아 시험용 케이블에 열적 스트레스를 인가시키는 것을 특징으로 하는 HVDC 전력케이블의 가속열화 모니터링 시스템.An accelerated deterioration monitoring system for HVDC power cables that receives induced current generated from the test cable of another unit cable fixing module and applies thermal stress to the test cable.
PCT/KR2022/016924 2022-10-27 2022-11-01 System for monitoring accelerated degradation of hvdc power cable WO2024090638A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200243598Y1 (en) * 2001-05-04 2001-10-12 김형연 coupling device earth line of communication cable
KR20150035183A (en) * 2013-09-27 2015-04-06 한국전력공사 Apparatus for accelerated degradation testing of cable
US20170030959A1 (en) * 2015-07-30 2017-02-02 Lsis Co., Ltd. Monitoring system for detecting error of harmonic filter in high voltage direct current (hvdc) system, and monitoring method thereof
KR20210094809A (en) * 2020-01-22 2021-07-30 사단법인 한국전기통신기술연구조합 System for diagonising cable
KR20220062747A (en) * 2020-11-09 2022-05-17 한국전기연구원 Accelerated aging test facility for HVDC power cable

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200243598Y1 (en) * 2001-05-04 2001-10-12 김형연 coupling device earth line of communication cable
KR20150035183A (en) * 2013-09-27 2015-04-06 한국전력공사 Apparatus for accelerated degradation testing of cable
US20170030959A1 (en) * 2015-07-30 2017-02-02 Lsis Co., Ltd. Monitoring system for detecting error of harmonic filter in high voltage direct current (hvdc) system, and monitoring method thereof
KR20210094809A (en) * 2020-01-22 2021-07-30 사단법인 한국전기통신기술연구조합 System for diagonising cable
KR20220062747A (en) * 2020-11-09 2022-05-17 한국전기연구원 Accelerated aging test facility for HVDC power cable

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