CN113985208A - System and method for accurately positioning fault of long-distance high-voltage submarine cable - Google Patents
System and method for accurately positioning fault of long-distance high-voltage submarine cable Download PDFInfo
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- CN113985208A CN113985208A CN202111267136.5A CN202111267136A CN113985208A CN 113985208 A CN113985208 A CN 113985208A CN 202111267136 A CN202111267136 A CN 202111267136A CN 113985208 A CN113985208 A CN 113985208A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 27
- 238000012545 processing Methods 0.000 claims abstract description 18
- 238000012360 testing method Methods 0.000 claims description 41
- 229920003020 cross-linked polyethylene Polymers 0.000 claims description 38
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 38
- 239000012774 insulation material Substances 0.000 claims description 32
- 238000009413 insulation Methods 0.000 claims description 28
- 230000009189 diving Effects 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000013500 data storage Methods 0.000 claims description 9
- 239000011810 insulating material Substances 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000009933 burial Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 238000001028 reflection method Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004643 material aging Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/11—Locating faults in cables, transmission lines, or networks using pulse reflection methods
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Locating Faults (AREA)
Abstract
The invention discloses a long-distance high-voltage submarine cable fault accurate positioning system and a method thereof, which comprises a submarine cable pulse detection receiver, a GPS (global positioning system) positioner, a data acquisition unit, a data processing unit and a submarine cable fault positioning unit, the system and the method can accurately position the submarine cable fault point.
Description
Technical Field
The invention belongs to the field of power equipment diagnosis tests, and relates to a system and a method for accurately positioning faults of a long-distance high-voltage submarine cable.
Background
With the acceleration of the development process of ocean resources, the application of the submarine high-voltage cable is more and more extensive, in particular to the fields of new energy development and the like. However, since the service environment of the submarine high-voltage cable is very complex, damage and fracture accidents to the submarine cable caused by scouring of sea waves and ocean currents, environmental corrosion, material aging, mechanical damage, human factor damage and the like sometimes occur, which affect the safety production at sea and bring about great economic loss.
Because the repair operation difficulty of the submarine high-voltage cable at sea is high, the damaged submarine cable can be effectively and quickly salvaged and the damaged part can be repaired by accurately positioning the fault position of the submarine high-voltage cable, so that the economic loss is reduced as much as possible. At present, a fault monitoring means of a submarine high-voltage cable mainly comprises a temperature change measurement method through a temperature measurement optical fiber, a time domain reflection method and the like, in the case of the conventional fault, the influence of submarine cable fault on temperature is small, the accuracy of the temperature measurement optical fiber is very low, the time domain reflection method can only measure the theoretical position, and the position of the actual fault point has a large difference as the route of the submarine cable can change along with the change of ocean current.
In the prior accurate positioning process of submarine cable fault points, due to factors such as external signal interference, the fault point positioning error is larger only by receiving and transmitting electromagnetic signals, the time is longer, and the process of emergency repair work is influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a long-distance high-voltage submarine cable fault accurate positioning system and method, which can accurately position a submarine cable fault point.
In order to achieve the purpose, the long-distance high-voltage submarine cable fault accurate positioning system comprises a submarine cable pulse detection receiver, a GPS (global positioning system) positioner, a data acquisition unit, a data processing unit, a submarine cable fault positioning unit, a computer, a submarine cable insulation tester for testing the insulativity of the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable, a direct-current high-voltage large-current generator for pressurizing and boosting the fault point of the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable, a TDR (time domain reflectometer) tester for performing pre-positioning test on the fault point of the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable and a submarine cable pulse generator for performing pulse discharge on the fault point of the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable;
the submarine cable pulse detection receiver and the GPS locator are connected with the data acquisition unit, the output end of the data acquisition unit is connected with the data processing unit, the output end of the data processing unit is connected with the submarine cable fault positioning unit, and the computer is connected with the data processing unit and the submarine cable fault positioning unit.
The submarine cable pulse detection receiver and the GPS locator are connected with the data acquisition unit through the underwater data transmission line.
The computer is connected with the data processing unit and the submarine cable fault positioning unit through the data connecting line.
The underwater sound collecting system also comprises an underwater detection rod and an underwater depth finder, wherein the underwater detection rod and the underwater depth finder are connected with the data collecting unit through an underwater data transmission line.
Still include underwater high definition digtal camera, underwater high definition digtal camera is connected with the data acquisition unit through data transmission line under water.
The device also comprises a data storage unit; the data acquisition unit and the computer are connected with the data storage unit.
The invention discloses a method for accurately positioning faults of a long-distance high-voltage submarine cable, which comprises the following steps:
1) carrying out insulation test on the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable by using a submarine cable insulation tester, and turning to the step 3) when the insulation test value obtained by measurement is smaller than a preset value, and turning to the step 2) when the insulation test value obtained by measurement is larger than the preset value;
2) pressurizing and raising the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable by using a direct-current high-voltage large-current generator, ablating a fault point, stopping pressurizing when the voltage is changed from raising to lowering, then performing insulation test on the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable by using a submarine cable insulation tester, and enabling the measured insulation test value to be smaller than a preset value, and then turning to the step 3);
3) performing prepositioning test on a fault point of the cross-linked polyethylene insulating material three-phase system type submarine high-voltage cable by using a TDR pulse time domain reflection tester to obtain the submarine cable length from the fault point to a test point;
4) positioning the position of the test point by using a GPS positioning instrument to obtain the position information of the test point;
5) carrying out pulse discharge on a fault point of the cross-linked polyethylene insulating material three-phase system type submarine high-voltage cable by using a submarine cable pulse generator;
6) and positioning the fault point of the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable by using a submarine cable pulse detection receiver.
The preset value is 10 omega.
The invention has the following beneficial effects:
when the long-distance high-voltage submarine cable fault accurate positioning system and the method are operated specifically, on the basis of the traditional submarine cable fault electromagnetic signal accurate positioning, a TDR pulse time domain reflection tester is used for carrying out pre-positioning test on a fault point, and then a submarine cable pulse generator and a submarine cable pulse detection receiver are used for positioning the fault point, so that the submarine cable fault point can be quickly and accurately positioned, the accuracy of accurate positioning is effectively improved, the time for searching the fault point is shortened, and the economic loss caused by submarine cable faults is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a travel diagram of a tow vessel;
FIG. 3 is a schematic view of the test of the submersible depth finder 8;
FIG. 4 is a flow chart of the present invention.
Wherein, 1 is submarine cable insulation tester, 2 is direct current high voltage heavy current generator, 3 is TDR pulse time domain reflection tester, 4 is submarine cable impulse generator, 5 is submarine cable pulse detection receiver, 6 is GPS locater, 7 is dive detection stick, 8 is diving depth finder, 9 is underwater high definition digtal camera, 10 is data acquisition unit, 11 is data storage unit, 12 is data processing unit, 13 is submarine cable fault location unit, 14 is the computer, 15 is the data connecting wire, 16 is the data transmission line under water, 17 is cross-linked polyethylene insulating material three-phase system type submarine high voltage cable.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the long-distance high-voltage submarine cable fault accurate positioning system comprises a submarine cable pulse detection receiver 5, a GPS locator 6, a diving detection rod 7, a diving depth finder 8, a diving high-definition camera 9, a diving data transmission line 16, a data acquisition unit 10, a data storage unit 11, a data processing unit 12, a submarine cable fault positioning unit 13, a computer 14, a data connection line 15, a submarine cable insulation tester 1 for testing the insulation of a cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable 17, a direct current high-voltage large current generator 2 for pressurizing and boosting a fault point of the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable 17, a TDR pulse time domain reflection tester 3 for pre-positioning the fault point of the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable 17, and a fault point of the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable 17 A submarine cable pulse generator 4 for pulse discharging of the barrier point;
the submarine cable pulse detection receiver 5, the GPS locator 6, the diving detection rod 7, the diving depth finder 8 and the underwater high-definition camera 9 are connected with the data acquisition unit 10 through an underwater data transmission line 16, the output end of the data acquisition unit 10 is connected with the data storage unit 11 and the data processing unit 12, the output end of the data processing unit 12 is connected with the submarine cable fault positioning unit 13, and the computer 14 is connected with the data storage unit 11, the data processing unit 12 and the submarine cable fault positioning unit 13 through a data connection line 15.
Referring to fig. 4, the method for accurately determining the fault of the long-distance high-voltage submarine cable according to the invention comprises the following steps:
1) carrying out insulation test on the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable 17 by using a submarine cable insulation tester 1, and turning to the step 3 when the measured insulation test value is smaller than a preset value (10 omega), and turning to the step 2 when the measured insulation test value is larger than the preset value);
2) pressurizing and upwelling the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable 17 by using the direct-current high-voltage large-current generator 2, ablating a fault point, stopping pressurizing when the voltage is changed from being increased to being reduced, then performing insulation test on the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable 17 by using the submarine cable insulation tester 1, so that the measured insulation test value is smaller than a preset value, and then turning to the step 3);
3) performing prepositioning test on a fault point of the cross-linked polyethylene insulating material three-phase system type submarine high-voltage cable 17 by using a TDR pulse time domain reflection tester 3 to obtain the submarine cable length from the fault point to a test point;
4) positioning the position of the test point by using a GPS (global positioning system) positioning instrument 6 to obtain the position information of the test point;
5) using a submarine cable pulse generator 4 to carry out pulse discharge on a fault point of the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable 17;
6) and positioning the fault point of the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable 17 by using a submarine cable pulse detection receiver 5.
Referring to fig. 2, the specific operation of step 6) is:
61) the probe of the submarine cable pulse detection receiver 5 runs through the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable 17 in parallel with the sea level and in vertical to the submarine cable, the position of the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable 17 is preliminarily determined, when the probe gradually approaches the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable 17 from far away, the signal received by the submarine cable pulse detection receiver 5 is gradually enhanced, when the probe passes right above the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable 17, the signal received by the submarine cable pulse detection receiver 5 is strongest, the submarine cable pulse detection receiver 5 transmits the received signal to the data acquisition unit 10, and then the data storage unit 11 is used for storing, at the same time, the data processing unit 12 processes the data to determine the position of the strongest point of the signal, and then sends the position of the strongest point of the signal to the computer 14; meanwhile, the GPS locator 6 sends longitude and latitude information of the strongest signal position to the computer 14;
62) the towing ship advances along the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable 17 in an S-shaped route towards the fault point, a point is collected while the point is close to the fault point, meanwhile, the computer 14 compares and corrects the test route of the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable 17 with the original initial route, and the distance from the current test point to the test point of the TDR pulse time domain reflection tester 3 is obtained, so that the distance from the test point to the fault point is obtained;
when the towing ship is closer to the fault point, the span of the S can be a little smaller, and the test point reaches the fault point and the submarine cable position is not mined in the S-shaped route mode, namely the towing ship is indicated to exceed the broken end, and the submarine cable position can be mined in the S-shaped route in a small span mode in the opposite direction.
7) When the fault point tested by the submarine cable pulse detection receiver 5 coincides with the actual route and fault distance of the cross-linked polyethylene insulation three-phase system type submarine high-voltage cable 17, the towing ship stops running, and a diver carries the diving detection rod 7, the diving depth finder 8 and the underwater high-definition camera 9 to enter the water bottom for actual survey;
the diver horizontally places the diving depth gauge 8 on the sea bottom, and an operator on a towing ship judges and instructs the diver to operate according to red, green and yellow waveforms, as shown in fig. 3, red, green and yellow represent the tail and the middle of the head of the device respectively, when the diving depth gauge 8 slowly changes red and green far away from the position right above a submarine cable, the diving depth gauge 8 moves towards the direction represented by the large median value of the red and green lines until the red and green lines respectively have mute points, the middle of the two mute points is the position right above the submarine cable, the diving depth gauge 8 is erected above the submarine cable, as shown in fig. 3, the position is corrected by the mute points of the yellow line, the device slowly rotates within the range of 180 degrees, the processing is carried out through the computer 14, and the minimum reading of the burial depth is the burial depth value of the submarine cable.
8) The test results are transmitted to the data acquisition unit 10 through the underwater data transmission line 16, and the survey results are analyzed and judged by the computer 14.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (8)
1. A long-distance high-voltage submarine cable fault accurate positioning system is characterized in that, the device comprises a submarine cable pulse detection receiver (5), a GPS (global positioning system) locator (6), a data acquisition unit (10), a data processing unit (12), a submarine cable fault positioning unit (13), a computer (14), a submarine cable insulation tester (1) for testing the insulation of a cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable (17), a direct-current high-voltage large current generator (2) for pressurizing and boosting a fault point of the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable (17), a TDR (time domain reflectometer) for performing a pre-positioning test on the fault point of the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable (17), and a submarine cable pulse generator (4) for performing pulse discharge on the fault point of the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable (17);
the submarine cable pulse detection receiver (5) and the GPS locator (6) are connected with the data acquisition unit (10), the output end of the data acquisition unit (10) is connected with the data processing unit (12), the output end of the data processing unit (12) is connected with the submarine cable fault positioning unit (13), and the computer (14) is connected with the data processing unit (12) and the submarine cable fault positioning unit (13).
2. The long-distance high-voltage submarine cable fault accurate positioning system according to claim 1, wherein the submarine cable pulse detection receiver (5) and the GPS locator (6) are connected with the data acquisition unit (10) through an underwater data transmission line (16).
3. The long-distance high-voltage submarine cable fault pinpointing system according to claim 1, characterized in that the computer (14) is connected with the data processing unit (12) and the submarine cable fault locating unit (13) through data connection lines (15).
4. The long-distance high-voltage submarine cable fault accurate positioning system according to claim 1, further comprising a diving detection rod (7) and a diving depth finder (8), wherein the diving detection rod (7) and the diving depth finder (8) are connected with the data acquisition unit (10) through an underwater data transmission line (16).
5. The long-distance high-voltage submarine cable fault accurate positioning system according to claim 1, further comprising an underwater high-definition camera (9), wherein the underwater high-definition camera (9) is connected with the data acquisition unit (10) through an underwater data transmission line (16).
6. The long-distance high-voltage submarine cable fault pinpointing system according to claim 1, characterized by further comprising a data storage unit (11); the data acquisition unit (10) and the computer (14) are connected with the data storage unit (11).
7. A method for accurately positioning a fault of a long-distance high-voltage submarine cable, which is based on the system for accurately positioning a fault of a long-distance high-voltage submarine cable according to claim 1, and comprises the following steps:
1) carrying out insulation test on the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable (17) by using a submarine cable insulation tester (1), and turning to the step 3 when the insulation test value obtained by measurement is smaller than a preset value, and turning to the step 2 when the insulation test value obtained by measurement is larger than the preset value;
2) pressurizing and upwelling the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable (17) by using a direct-current high-voltage large-current generator (2), ablating a fault point, stopping pressurizing when the voltage is changed from being increased to being reduced, then performing insulation test on the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable (17) by using a submarine cable insulation tester (1) to enable the measured insulation test value to be smaller than a preset value, and then turning to the step 3);
3) performing prepositioning test on a fault point of the cross-linked polyethylene insulating material three-phase system type submarine high-voltage cable (17) by using a TDR pulse time domain reflection tester (3) to obtain the submarine cable length from the fault point to a test point;
4) positioning the position of the test point by using a GPS (global positioning system) locator (6) to obtain the position information of the test point;
5) using a submarine cable pulse generator (4) to carry out pulse discharge on a fault point of the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable (17);
6) and a submarine cable pulse detection receiver (5) is used for positioning the fault point of the cross-linked polyethylene insulation material three-phase system type submarine high-voltage cable (17).
8. The method for accurately positioning the fault of the long-distance high-voltage submarine cable according to claim 7, wherein the preset value is 10 Ω.
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