CN108594081A - A kind of submarine cable Fault of Insulating Breakdown locating and detecting device - Google Patents
A kind of submarine cable Fault of Insulating Breakdown locating and detecting device Download PDFInfo
- Publication number
- CN108594081A CN108594081A CN201810583592.2A CN201810583592A CN108594081A CN 108594081 A CN108594081 A CN 108594081A CN 201810583592 A CN201810583592 A CN 201810583592A CN 108594081 A CN108594081 A CN 108594081A
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- China
- Prior art keywords
- extra large
- large cable
- optical fiber
- cable
- locating
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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
-
- 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
- G01R31/12—Testing 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
- G01R31/1209—Testing 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 using acoustic measurements
-
- 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
- G01R31/12—Testing 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
- G01R31/1218—Testing 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 using optical methods; using charged particle, e.g. electron, beams or X-rays
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of submarine cable Fault of Insulating Breakdown locating and detecting devices, including impulse voltage generator, distributed optical fiber vibration host and extra large cable, the distributed optical fiber vibration host is connect with extra large cable by ordinary optical cable welding, the extra large cable is internally provided with extra large cable conductor, single mode optical fiber in the ordinary optical cable is connect with the single mode optical fiber welding in extra large cable conductor, and the impulse voltage generator is connect by copper wire with the beginning of extra large cable conductor inside extra large cable.The present invention monitors the vibration signal along extra large cable in real time using distributed optical fiber vibration sensing host, the vibration signal discharged when measurement punctures extra large cable simultaneously, time frequency analysis is carried out to the vibration signal of breakdown point, it can effectively realize the detection and positioning of extra large cable Fault of Insulating Breakdown, improve extra large cable first-aid repair efficiency；Directly using single mode optical fiber compound in extra large cable as sensor, detection range, can be with two concurrents of resolved intervals 10m, single-point sample rate 1000Hz up to 50km.
Description
Technical field
The present invention relates to electric power detection device technical field, specially a kind of submarine cable Fault of Insulating Breakdown detection and localization
Device.
Background technology
In recent years, with the development of China's marine economy, demand of the island power supply to sea electric power cable sharply increases, island
Small island and ocean transmission of electricity project also proposed requirements at the higher level to power supply reliability.But due to the severe sea condition and sea fisheries in coastal waters
Frequent activity often causes the damage of extra large cable.For a long time, it due to lacking reliable intelligent patrol detection equipment, can not send out in time
Now extra large cable is damaged caused by the reasons such as external force destruction, chemical attack, cable aging, and follow-up repair is even more difficult.
At this stage, the breakdown repair of submarine cable has no standard repair procedure, but main repairing process can be divided into 4 ranks
Section:The fault point of submarine cable and path orientation, failure submarine cable is salvaged, submarine cable broken string remodeling, to repair
Submarine cable reapposed.
The method of monitoring insulation at present has calculus of finite differences, capacitive couplings, traveling wave method, tan δ methods etc..These methods be difficult and
Shi Faxian simultaneously judges breakdown fault and carries out fault location, influences accident maintenance efficiency.
Invention content
The purpose of the present invention is to provide a kind of submarine cable Fault of Insulating Breakdown locating and detecting devices, solve existing difference
Point-score, capacitive couplings, traveling wave method, tan δ methods are difficult to find and judge breakdown fault in time and carry out fault location, influence thing
Therefore the problem of first-aid repair efficiency.
In order to achieve the above object, the present invention is achieved by the following technical programs：A kind of submarine cable insulation breakdown event
Hinder locating and detecting device, including impulse voltage generator, distributed optical fiber vibration host and extra large cable, the distributed optical fiber vibration
Host is connect with extra large cable by ordinary optical cable welding, and the extra large cable is internally provided with extra large cable conductor, the list in the ordinary optical cable
Mode fiber is connect with the single mode optical fiber welding in extra large cable conductor, and the impulse voltage generator passes through extra large cable inside copper wire and extra large cable
The beginning of conductor connects, and the control that the distributed optical fiber vibration host is equipped with display screen and is opened and closed for control device is pressed
Key.
Preferably, the laser of the distributed optical fiber vibration host being internally provided with for sending laser signal to extra large cable
Device, for the electrooptic modulator of modulating lasering beam intensity, the photodetector of wave mode optical signal is sent out for receiving the extra large cable
With the signal picker for collecting electric signal.
Preferably, the electrooptic modulator is equipped with the sonic generator for emitting acousto-optic medium.
Preferably, the photodetector is equipped with the annular for laser injection single mode optical fiber and reception to be scattered to light
Device.
Preferably, the distributed optical fiber vibration host is internally provided with the light arteries and veins modulated for amplifying electrooptic modulator
The EDFA Erbium-Doped Fiber Amplifier of punching.
Preferably, the wireless hair of the distributed optical fiber vibration host being internally provided with for sending signal picker data
Emitter.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention
(1) vibration signal along extra large cable is monitored in real time using distributed optical fiber vibration sensing host, while measuring to sea
The front and back signal data of failure breakdown is sent to monitoring host shape by the vibration signal that cable discharges when puncturing by wireless transmitter
At space-time spectrogram, time frequency analysis is carried out to the vibration signal of breakdown point, can effectively realize extra large cable Fault of Insulating Breakdown detection and
Positioning improves extra large cable first-aid repair efficiency.
(2) insulation puncture test, directly profit are carried out to the submarine cable with insulation defect using high voltage direct current generator
Use single mode optical fiber compound in extra large cable as sensor, detection range can simultaneously be sent out up to 50km with two of resolved intervals 10m
Raw event, single-point sample rate 1000Hz, the frequency limitation that can be identified is 500Hz.
Description of the drawings
Fig. 1 is the whole structural schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram inside the present invention.
In figure：1- impulse voltage generators, 2- distributed optical fiber vibrations host, 21- lasers, 22- electrooptic modulators,
23- EDFA Erbium-Doped Fiber Amplifiers, 24- sonic generators, 25- circulators, 26- wireless transmitters, 27- signal pickers, 28- light
Electric explorer, 3- display screens, 4- control buttons, 5- ordinary optical cables, 6- extra large cables, 7- extra large cables conductor, 71- single mode optical fibers, 8- copper
Line.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
- 2 are please referred to Fig.1, the present invention provides a kind of technical solution：A kind of submarine cable Fault of Insulating Breakdown detection and localization dress
It sets, including impulse voltage generator 1, distributed optical fiber vibration host 2 and extra large cable 6, distributed optical fiber vibration host 2 and extra large cable 6
It is connected, ordinary optical cable 5 is connect with the composite fiber welding in extra large cable 6, and in composite fiber tail end by 5 welding of ordinary optical cable
One section of tail optical fiber of welding avoids the section of optical fiber tail-end from influencing measurement data, and extra large cable 6 is internally provided with extra large cable conductor 7, ordinary optical cable
Single mode optical fiber 71 in 5 is connect with 71 welding of single mode optical fiber in extra large cable conductor 7, and impulse voltage generator 1 passes through copper wire 8 and sea
The beginning of 6 inside extra large cable conductor 7 of cable connects, during impulse voltage generator 1 starts, it is necessary to remain 6 tail of extra large cable
End oversheath is connect with ground, and the control that distributed optical fiber vibration host 2 is equipped with display screen 3 and is opened and closed for control device is pressed
Key 4.
Distributed optical fiber vibration host 2 be internally provided with for extra large cable 6 send laser signal laser 21, for adjusting
The electrooptic modulator 22 of controlling laser beam intensity sends out the photodetector 28 of wave mode optical signal and for receiving for receiving extra large cable 6
Collect the signal picker 27 of electric signal；
Electrooptic modulator 22 is equipped with the sonic generator 24 for emitting acousto-optic medium, and electrooptic modulator 22 uses optical fiber
Electrooptic modulator is coupled, is made of acousto-optic medium and PZT (piezoelectric transducer).When the laser beam that laser 21 is launched drives energy converter
When, energy converter is to generate the ultrasonic wave of same frequency, and be passed in the acousto-optic medium that sonic generator 24 is sent out, the shape in medium
At variations in refractive index, the direction of propagation that light occurs to change by interaction when medium for laser beam generates diffraction；
Photodetector 28 is equipped with the circulator 25 for laser injection single mode optical fiber 71 and reception to be scattered to light；
Distributed optical fiber vibration host 2 is internally provided with for amplifying mixing for light pulse that electrooptic modulator 22 modulates
Bait fiber amplifier 23；
The wireless transmitter 26 of distributed optical fiber vibration host 2 being internally provided with for sending 27 data of signal picker.
Operation principle：Distributed optical fiber vibration host 2 is connect by ordinary optical cable 5 with extra large cable conductor 7 first, commonly
Using an existing single mode light 71 in extra large cable conductor 7 in optical cable 5, by the composite fiber welding in ordinary optical cable 5 and extra large cable 6
Connection, and in one section of tail optical fiber of composite fiber tail end welding, the section of optical fiber tail-end is avoided to influence measurement data, it then will with copper wire
Impulse voltage generator 1 is reliably connected with 6 beginning extra large cable conductor 7 of extra large cable, and the oversheath of 6 terminal of extra large cable is connect with the earth；
Before starting detection, the sound wave that laser that ultra-narrow laser 21 is sent out is sent out with sonic generator 24 is through electro-optical modulation
The light pulse that device 22 is modulated into, after being amplified by erbium-doped fiber amplifier 23, after being injected in single mode optical fiber 71 by circulator 25, to
Rayleigh scattering light interferes in pulse width afterwards, and interference light intensity is detected by circulator 25 by photodetector 28, through putting
Enter signal picker 27 after big, the signal of collection is sent to monitoring host by signal picker 27 by wireless transmitter 26
Operation calculates；
When starting detection, high-voltage pulse, fixed electronic pulse width are applied to extra large cable using 3000kV/600kJ surge voltages
After gradually increase pulse voltage until puncture occur until, insulation it is breakdown, voltage rapid decrease be 0,2kv is still kept after breakdown
The residual voltage of left and right, until electric pulse terminates.
Monitoring host calculates the data run before and after insulation breakdown that distributed optical fiber vibration host 2 is sent to form space-time
Spectrogram, horizontal axis are the vibration signal sampled points along optical fiber, and every mono- sampled point of 5m, the longitudinal axis is time shaft, more up the time
More rearward, color is brighter, and energy is higher, color high light, and there are the signal of apparent energy attenuation, as fault point in both sides.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
Claims (6)
1. a kind of submarine cable Fault of Insulating Breakdown locating and detecting device, including impulse voltage generator (1), distribution type fiber-optic shake
Dynamic host (2) and extra large cable (6), it is characterised in that：The distributed optical fiber vibration host (2) passes through ordinary optical cable with extra large cable (6)
(5) welding connects, and the extra large cable (6) is internally provided with extra large cable conductor (7), the single mode optical fiber (71) in the ordinary optical cable (5)
It is connect with single mode optical fiber (71) welding in extra large cable conductor (7), the impulse voltage generator (1) passes through copper wire (8) and extra large cable
(6) the beginning connection of internal extra large cable conductor (7), the distributed optical fiber vibration host (2) are equipped with display screen (3) and for controlling
The control button (4) that control equipment opens and closes.
2. a kind of submarine cable Fault of Insulating Breakdown locating and detecting device according to claim 1, which is characterized in that described
Distributed optical fiber vibration host (2) be internally provided with for extra large cable (6) send laser signal laser (21), for modulating
The electrooptic modulator (22) of laser beam intensity sends out the photodetector (28) of wave mode optical signal for receiving the extra large cable (6)
With the signal picker (27) for collecting electric signal.
3. a kind of submarine cable Fault of Insulating Breakdown locating and detecting device according to claim 1, which is characterized in that described
Electrooptic modulator (22) is equipped with the sonic generator (24) for emitting acousto-optic medium.
4. a kind of submarine cable Fault of Insulating Breakdown locating and detecting device according to claim 1, which is characterized in that described
Photodetector (28) is equipped with the circulator (25) for laser injection single mode optical fiber (71) and reception to be scattered to light.
5. a kind of submarine cable Fault of Insulating Breakdown locating and detecting device according to claim 1, which is characterized in that described
The erbium-doped fiber of distributed optical fiber vibration host (2) being internally provided with for amplifying the light pulse that electrooptic modulator (22) modulates
Amplifier (23).
6. a kind of submarine cable Fault of Insulating Breakdown locating and detecting device according to claim 1, which is characterized in that described
The wireless transmitter (26) of distributed optical fiber vibration host (2) being internally provided with for sending signal picker (27) data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810583592.2A CN108594081A (en) | 2018-06-08 | 2018-06-08 | A kind of submarine cable Fault of Insulating Breakdown locating and detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810583592.2A CN108594081A (en) | 2018-06-08 | 2018-06-08 | A kind of submarine cable Fault of Insulating Breakdown locating and detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108594081A true CN108594081A (en) | 2018-09-28 |
Family
ID=63623231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810583592.2A Withdrawn CN108594081A (en) | 2018-06-08 | 2018-06-08 | A kind of submarine cable Fault of Insulating Breakdown locating and detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108594081A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447767A (en) * | 2021-06-25 | 2021-09-28 | 北京英瑞来科技有限公司 | Method and system for positioning metal jacket fault of high-voltage power cable |
| CN114062974A (en) * | 2021-11-12 | 2022-02-18 | 国网山东省电力公司高密市供电公司 | Cable checking device and method |
| CN114152848A (en) * | 2021-11-30 | 2022-03-08 | 南京中探海洋物联网有限公司 | Fault detection method and equipment for gas insulated totally-enclosed combined electrical apparatus |
| CN114325836A (en) * | 2021-12-31 | 2022-04-12 | 安徽陶博士环保科技有限公司 | Submarine optical cable and photoelectric composite cable tracing method and device |
-
2018
- 2018-06-08 CN CN201810583592.2A patent/CN108594081A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447767A (en) * | 2021-06-25 | 2021-09-28 | 北京英瑞来科技有限公司 | Method and system for positioning metal jacket fault of high-voltage power cable |
| CN114062974A (en) * | 2021-11-12 | 2022-02-18 | 国网山东省电力公司高密市供电公司 | Cable checking device and method |
| CN114152848A (en) * | 2021-11-30 | 2022-03-08 | 南京中探海洋物联网有限公司 | Fault detection method and equipment for gas insulated totally-enclosed combined electrical apparatus |
| CN114325836A (en) * | 2021-12-31 | 2022-04-12 | 安徽陶博士环保科技有限公司 | Submarine optical cable and photoelectric composite cable tracing method and device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication | ||
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Application publication date: 20180928 |