CN113514734A - Fault diagnosis method and system for long-distance high-voltage submarine cable - Google Patents
Fault diagnosis method and system for long-distance high-voltage submarine cable Download PDFInfo
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- CN113514734A CN113514734A CN202110409552.8A CN202110409552A CN113514734A CN 113514734 A CN113514734 A CN 113514734A CN 202110409552 A CN202110409552 A CN 202110409552A CN 113514734 A CN113514734 A CN 113514734A
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000009413 insulation Methods 0.000 claims abstract description 41
- 238000007405 data analysis Methods 0.000 claims abstract description 22
- 230000016507 interphase Effects 0.000 claims abstract description 17
- 238000012360 testing method Methods 0.000 claims description 30
- 230000005674 electromagnetic induction Effects 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 238000013480 data collection Methods 0.000 claims 1
- 238000004590 computer program Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 10
- 230000008439 repair process Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method 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
Abstract
The invention discloses a fault diagnosis method and a fault diagnosis system for a long-distance high-voltage submarine cable, wherein the fault diagnosis method comprises the following steps: collecting direct current resistance, relative ground insulation resistance and interphase insulation resistance of each phase of the submarine cable; carrying out data analysis on each phase direct current resistance, the relative ground insulation resistance and the interphase insulation resistance of the submarine cable; judging the fault type of the submarine cable according to the data analysis result; pre-positioning a fault point of the submarine cable according to the fault type of the submarine cable; accurately positioning a fault point of the submarine cable according to the fault type of the submarine cable; comparing the pre-positioning result with the accurate positioning result; and acquiring a final positioning result of the fault point according to a comparison result of the pre-positioning result and the accurate positioning result, wherein the method and the system can shorten the time of fault diagnosis of the submarine cable.
Description
Technical Field
The invention belongs to the field of power equipment diagnosis tests, and relates to a fault diagnosis method and system for a long-distance high-voltage submarine cable.
Background
Offshore wind power in China is becoming a new power for global offshore wind power development, and the supporting effect of offshore wind power on energy transformation in China will be more and more obvious. The submarine cable is an indispensable part of ocean wind power construction, and the current ocean wind power is developing from shallow sea to deep sea, which means that the submarine cable is longer and higher in length and higher in density, and because of the severe and unpredictable submarine environment and anchor dropping factors such as fishing boats in the ocean area, the occurrence of submarine cable faults is inevitable sometimes, and how to quickly find the fault point of the submarine cable and complete the repair plays a very important role.
In the past, in submarine cable fault diagnosis, testers are often required to firstly judge the fault of a submarine cable according to test results and experience, then carry out pre-positioning on a submarine cable fault point, and finally carry out accurate positioning, so that a large amount of time and energy are often required, and meanwhile, due to the fact that the testers have different technical experiences, misjudgment can be caused, the time for submarine cable fault diagnosis and treatment is delayed, and a large amount of economic loss is caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method and a system for diagnosing the fault of a long-distance high-voltage submarine cable, which can shorten the time for diagnosing the fault of the submarine cable.
In order to achieve the above object, the method for diagnosing a fault of a long-distance high-voltage submarine cable according to the present invention comprises:
collecting direct current resistance, relative ground insulation resistance and interphase insulation resistance of each phase of the submarine cable;
carrying out data analysis on each phase direct current resistance, the relative ground insulation resistance and the interphase insulation resistance of the submarine cable;
judging the fault type of the submarine cable according to the data analysis result;
pre-positioning a fault point of the submarine cable according to the fault type of the submarine cable;
accurately positioning a fault point of the submarine cable according to the fault type of the submarine cable;
comparing the pre-positioning result with the accurate positioning result;
and acquiring a final positioning result of the fault point according to the comparison result of the pre-positioning result and the accurate positioning result.
A long distance high voltage submarine cable fault diagnosis system comprising:
the fault data acquisition unit is used for acquiring the direct current resistance, the relative ground insulation resistance and the interphase insulation resistance of each phase of the submarine cable;
the first fault data analysis unit is used for carrying out data analysis on each phase direct current resistance, the relative ground insulation resistance and the interphase insulation resistance of the submarine cable;
the first fault judging unit is used for judging the fault type of the submarine cable according to the data analysis result;
the fault point pre-positioning unit is used for pre-positioning the fault point of the submarine cable according to the fault type of the submarine cable;
the fault point accurate positioning unit is used for accurately positioning the fault point of the submarine cable according to the fault type of the submarine cable;
the second fault data analysis unit is used for comparing the pre-positioning result with the accurate positioning result;
and the second fault judgment unit is used for acquiring a final positioning result of the fault point according to the comparison result of the pre-positioning result and the accurate positioning result.
The fault data acquisition unit comprises an insulation resistance test module and a direct current resistance test module, the direct current resistance test module is used for measuring the direct current resistance of each phase of the submarine cable, and the insulation resistance test module is used for measuring the relative ground insulation resistance and the interphase insulation resistance of the submarine cable.
The fault point pre-positioning unit comprises a low-voltage pulse reflection module, a bridge testing module and a pulse voltage sampling module.
And when the fault of the submarine cable is a low-resistance fault or an open circuit fault, pre-positioning the submarine cable by adopting the low-voltage pulse reflection module and the bridge test module.
And when the fault of the submarine cable is a high-resistance fault, pre-positioning the submarine cable by adopting the pulse voltage sampling module.
The fault point accurate positioning unit comprises an electromagnetic induction testing module and an acoustic-magnetic synchronous testing module.
And when the fault of the submarine cable is a low-resistance fault or an open circuit fault, the submarine cable is accurately positioned by adopting the electromagnetic induction testing module.
And when the fault of the submarine cable is a high-resistance fault, accurately positioning the submarine cable by adopting the acoustic-magnetic synchronous testing module.
The invention has the following beneficial effects:
the fault diagnosis method and the fault diagnosis system for the long-distance high-voltage submarine cable adopt an automatic detection mode to realize the diagnosis of the fault of the submarine cable during the specific operation, and particularly, judging the fault type of the submarine cable according to the direct current resistance of each phase, the relative ground insulation resistance and the interphase insulation resistance of the submarine cable, pre-positioning and accurately positioning a fault point according to the fault type of the submarine cable, then the final positioning result of the fault point is obtained according to the results of the pre-positioning and the accurate positioning, the submarine cable fault is diagnosed systematically and rapidly, the method has the advantages that the fault type of the submarine cable is accurately judged, the fault point is accurately positioned, misjudgment caused by experience difference of technical personnel is avoided, the efficiency of submarine cable fault diagnosis is improved, the time of submarine cable fault diagnosis and subsequent repair is shortened, the repair cost is reduced, and the economic loss caused by submarine cable fault is reduced.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
The system comprises a fault data acquisition unit 1, a first fault data analysis unit 2, a first fault judgment unit 3, a fault point preset bit unit 4, a fault point accurate positioning unit 5, a second fault data analysis unit 6 and a second fault judgment unit 7.
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.
Example one
The fault diagnosis method for the long-distance high-voltage submarine cable comprises the following steps:
collecting direct current resistance, relative ground insulation resistance and interphase insulation resistance of each phase of the submarine cable;
carrying out data analysis on each phase direct current resistance, the relative ground insulation resistance and the interphase insulation resistance of the submarine cable;
judging the fault type of the submarine cable according to the data analysis result;
pre-positioning a fault point of the submarine cable according to the fault type of the submarine cable;
accurately positioning a fault point of the submarine cable according to the fault type of the submarine cable;
comparing the pre-positioning result with the accurate positioning result;
and acquiring a final positioning result of the fault point according to the comparison result of the pre-positioning result and the accurate positioning result.
Example two
A long distance high voltage submarine cable fault diagnosis system comprising:
the fault data acquisition unit 1 is used for acquiring direct current resistance, relative ground insulation resistance and interphase insulation resistance of each phase of the submarine cable;
the first fault data analysis unit 2 is used for carrying out data analysis on each phase direct current resistance, the relative ground insulation resistance and the interphase insulation resistance of the submarine cable;
the first fault judgment unit 3 is used for judging the fault type of the submarine cable according to the data analysis result;
the fault point pre-positioning unit 4 is used for pre-positioning the fault point of the submarine cable according to the fault type of the submarine cable;
the fault point accurate positioning unit 5 is used for accurately positioning the fault point of the submarine cable according to the fault type of the submarine cable;
the second fault data analysis unit 6 is used for comparing the pre-positioning result with the accurate positioning result;
and the second fault judgment unit 7 is used for acquiring a final positioning result of the fault point according to a comparison result of the pre-positioning result and the accurate positioning result.
The fault data acquisition unit 1 comprises an insulation resistance test module and a direct current resistance test module, measures the direct current resistance of each phase of the submarine cable through the direct current resistance test module, and measures the relative ground insulation resistance and the interphase insulation resistance of the submarine cable through the insulation resistance test module.
The fault point pre-positioning unit 4 comprises a low-voltage pulse reflection module, a bridge testing module and a pulse voltage sampling module, wherein when the fault of the submarine cable is a low-resistance and open-circuit fault, the submarine cable is pre-positioned by the low-voltage pulse reflection module and the bridge testing module; and when the fault of the submarine cable is a high-resistance fault, pre-positioning the submarine cable by adopting the pulse voltage sampling module.
The fault point accurate positioning unit 5 comprises an electromagnetic induction testing module and an acoustic-magnetic synchronous testing module, wherein when the fault of the submarine cable is a low-resistance fault or a broken circuit fault, the submarine cable is accurately positioned by the electromagnetic induction testing module; and when the fault of the submarine cable is a high-resistance fault, accurately positioning the submarine cable by adopting the acoustic-magnetic synchronous testing module.
EXAMPLE III
A computer device comprising a memory, a processor and a computer program stored in and executable on the memory, the processor implementing the steps of the method for diagnosing a fault of a long-distance high-voltage submarine cable when executing the computer program, wherein the memory may comprise a memory, such as a high-speed random access memory, and may further comprise a non-volatile memory, such as at least one disk memory, etc.; the processor, the network interface and the memory are connected with each other through an internal bus, wherein the internal bus can be an industrial standard system structure bus, a peripheral component interconnection standard bus, an extended industrial standard structure bus and the like, and the bus can be divided into an address bus, a data bus, a control bus and the like. The memory is used for storing programs, and particularly, the programs can comprise program codes which comprise computer operation instructions. The memory may include both memory and non-volatile storage and provides instructions and data to the processor.
Example four
A computer-readable storage medium, storing a computer program which, when executed by a processor, implements the steps of the long-haul high-voltage submarine cable fault diagnosis method, in particular, the computer-readable storage medium comprising, but not limited to, for example, volatile and/or non-volatile memory. The volatile memory may include Random Access Memory (RAM) and/or cache memory (cache), among others. The non-volatile memory may include a Read Only Memory (ROM), hard disk, flash memory, optical disk, magnetic disk, and the like.
In conclusion, the submarine cable fault diagnosis method and the submarine cable fault diagnosis system can accurately judge the fault type of the submarine cable and accurately position the fault point so as to improve the efficiency of submarine cable fault diagnosis, reduce the time of submarine cable fault diagnosis and subsequent repair, reduce the repair cost and reduce the economic loss caused by submarine cable faults.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
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 (9)
1. A fault diagnosis method for a long-distance high-voltage submarine cable is characterized by comprising the following steps:
collecting direct current resistance, relative ground insulation resistance and interphase insulation resistance of each phase of the submarine cable;
carrying out data analysis on each phase direct current resistance, the relative ground insulation resistance and the interphase insulation resistance of the submarine cable;
judging the fault type of the submarine cable according to the data analysis result;
pre-positioning a fault point of the submarine cable according to the fault type of the submarine cable;
accurately positioning a fault point of the submarine cable according to the fault type of the submarine cable;
comparing the pre-positioning result with the accurate positioning result;
and acquiring a final positioning result of the fault point according to the comparison result of the pre-positioning result and the accurate positioning result.
2. A long distance high voltage submarine cable fault diagnosis system comprising:
the fault data acquisition unit (1) is used for acquiring direct current resistance, relative ground insulation resistance and interphase insulation resistance of each phase of the submarine cable;
the first fault data analysis unit (2) is used for carrying out data analysis on each phase direct current resistance, the relative ground insulation resistance and the interphase insulation resistance of the submarine cable;
the first fault judging unit (3) is used for judging the fault type of the submarine cable according to the data analysis result;
a fault point pre-positioning unit (4) for pre-positioning a fault point of the submarine cable according to the fault type of the submarine cable;
the fault point accurate positioning unit (5) is used for accurately positioning the fault point of the submarine cable according to the fault type of the submarine cable;
the second fault data analysis unit (6) is used for comparing the pre-positioning result with the accurate positioning result;
and the second fault judgment unit (7) is used for acquiring the final positioning result of the fault point according to the comparison result of the pre-positioning result and the accurate positioning result.
3. The long-distance high-voltage submarine cable fault diagnosis system according to claim 2, wherein the fault data collection unit (1) comprises an insulation resistance test module by which the direct-current resistance of each phase of the submarine cable is measured, and a direct-current resistance test module by which the relative ground insulation resistance and the phase-to-phase insulation resistance of the submarine cable are measured.
4. The long distance high voltage submarine cable fault diagnosis system according to claim 2, wherein the fault point pre-determination unit (4) comprises a low voltage pulse reflection module, a bridge test module and a pulse voltage sampling module.
5. The long reach high voltage submarine cable fault diagnosis system according to claim 4, wherein when the submarine cable fault is a low resistance and open circuit fault, the submarine cable is pre-positioned using the low voltage pulse reflection module and the bridge test module.
6. The long distance high voltage submarine cable fault diagnosis system according to claim 4, wherein when the submarine cable fault is a high impedance fault, the submarine cable is pre-positioned using the pulsed voltage sampling module.
7. The long-distance high-voltage submarine cable fault diagnosis system according to claim 2, wherein the fault point pinpoint unit (5) comprises an electromagnetic induction test module and an acousto-magnetic synchronization test module.
8. The long distance high voltage submarine cable fault diagnosis system according to claim 7, wherein when the submarine cable fault is a low resistance fault or an open circuit fault, the submarine cable is accurately positioned using the electromagnetic induction test module.
9. The long-distance high-voltage submarine cable fault diagnosis system according to claim 7, wherein when the submarine cable fault is a high-resistance fault, the submarine cable is precisely positioned by using the acousto-magnetic synchronous test module.
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| US11965800B1 (en) * | 2021-09-10 | 2024-04-23 | The United States Of America As Represented By The Secretary Of The Navy | Breakout box for testing periscope cable connectors |
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