CN108680842A - Buried cable local discharge detection device - Google Patents
Buried cable local discharge detection device Download PDFInfo
- Publication number
- CN108680842A CN108680842A CN201810828106.9A CN201810828106A CN108680842A CN 108680842 A CN108680842 A CN 108680842A CN 201810828106 A CN201810828106 A CN 201810828106A CN 108680842 A CN108680842 A CN 108680842A
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- China
- Prior art keywords
- field sensor
- shell
- electric
- detection device
- cable
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Classifications
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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
- G01R31/12—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
- G01R31/1227—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 of components, parts or materials
- G01R31/1263—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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a kind of buried cable local discharge detection devices, including a detector, and the electric-field sensor, the magnetic field sensor that are connected therewith by signal-transmitting cable, further include a test chamber, the test chamber includes shell and ontology, and the ontology is attached to the inner surface of the shell.The beneficial effects of the invention are as follows：Test chamber is rectangular shape and semi-spherical shape, is realized in underground, the detection to cable failure situation on the ground；Electric-field sensor, magnetic field sensor, detector are used cooperatively, effectively detection, reception, processing pulse signal, convenient for judging the active level in cable with the presence or absence of shelf depreciation and electric discharge.
Description
Technical field
The present invention relates to cable detection apparatus field, especially a kind of buried cable local discharge detection device.
Background technology
Power cable is due to factory process technique, field fabrication technique and running environment corrosion etc., in insulating layer
How much some defects can be had, these defects make uniform electric field generation distortion originally around cable core, to excite part
Electric discharge, finally develops into cable breakdown failure, causes serious consequence.
Cable is generally embedded in cable duct, insulation start deterioration or cable break down after, need efficiently with accurately
It finds insulation defect point and eliminates failure.To improve cable operational reliability, examined for a large amount of online states of electricity consumption enterprise installation
Survey device.By measuring the intensity and motion frequency of the pulsed amperometric signal on cable grounding line, cable insulation shape is realized
The detection of state and fault diagnosis.
Patent document CN204177874U discloses a kind of distribution cable electrification background noise detection device, is used for
The live detection of power distribution cabinet and cable judges that power distribution cabinet and cable whether there is office by the detection and analysis of noise information
Portion discharges and the active level of electric discharge.This detection device, there are electromagnetic interferences, in addition, a plurality of cable feeder line in distribution
Ground wire often first links together nearby, and the pulse current of PD between different cables can also interfere with each other, it is difficult to
It determines the true cable that shelf depreciation occurs, influences diagnosis effect.
Invention content
It is an object of the invention to overcome the above technological deficiency, provide a kind of convenient for shelf depreciation letter inside identification cable
Number, can safely, conveniently, the buried cable local discharge detection device of efficient identification detection information.
By realization, its technical purpose adopts the technical scheme that the present invention：
Buried cable local discharge detection device, including a detector, and the electricity that is connected therewith by signal-transmitting cable
Field sensor, magnetic field sensor, it is characterised in that：Further include a test chamber, the test chamber includes shell and ontology, described
Body is attached to the inner surface of the shell；
The electric-field sensor, magnetic field sensor are arranged at the top of the test chamber, and the test chamber is for collecting underground
The pulse signal of cable, electric-field sensor, magnetic field sensor can detect pulse signal, and detector can receive and handle by electric field
The two pulse signals that sensor and magnetic field sensor provide, and according to the order of arrival, intensity of pulse in two pulse signals
And frequency, judge the active level with the presence or absence of shelf depreciation and electric discharge in cable.
Preferably, the electric-field sensor include shell, the electrode that is set in shell, lead, resistance, discharge tube and
BNC connectors.
Preferably, the magnetic field sensor includes shell, the coil, resistance, discharge tube and the BNC that are set in shell connect
Head.
Preferably, the detector includes shell, the amplification of the BNC connectors that are set in shell, filter, signal and adopts
Sample circuit, processor and display screen, wherein BNC connectors, filter, signal amplification and sample circuit, processor and display screen
It contacts successively；The display screen is used to show the waveform of two pulse signals.
Preferably, the detection chamber enclosure is rectangular shape.
Preferably, the detection chamber enclosure is semi-spherical shape.
Preferably, the shell is insulating materials.
The beneficial effects of the invention are as follows：Test chamber is rectangular shape and semi-spherical shape, is realized in underground, on the ground to cable
The detection of breakage；Electric-field sensor, magnetic field sensor, detector are used cooperatively, effectively detection, reception, processing pulse letter
Number, convenient for judging the active level in cable with the presence or absence of shelf depreciation and electric discharge.
Description of the drawings
Fig. 1 is overall schematic of the present invention.
Fig. 2 is rectangular shape test chamber schematic diagram.
Fig. 3 is electric-field sensor schematic diagram.
Fig. 4 is magnetic field sensor schematic diagram.
Fig. 5 is detector schematic diagram.
The overall schematic that Fig. 6 is test chamber when being semi-spherical shape.
Fig. 7 is semi-spherical shape test chamber schematic diagram.
In figure：1, detector；11, shell；12, BNC connectors；13, filter；
14, signal amplification and sample circuit；15, processor；16 display screens；2, transmission cable；3, electric-field sensor；
4, magnetic field sensor；5, test chamber；51, shell；52, ontology；31, shell；32, electrode；33, lead；
34, resistance；35, discharge tube；36, BNC connectors；41, shell；42, coil；43, resistance；44, discharge tube；45, BNC connects
Head.
Specific implementation mode
The present invention will be further described for embodiment below in conjunction with the accompanying drawings.
Embodiment one
As shown in Figs. 1-5：
Buried cable local discharge detection device, including a detector 1, and be connected therewith by signal-transmitting cable 2
Electric-field sensor 3, magnetic field sensor 4, it is characterised in that：Further include a test chamber 5, the test chamber 5 includes shell 51 and this
Body 52, the ontology 52 are attached to the inner surface of the shell 51；
The electric-field sensor 3, magnetic field sensor 4 are arranged at the top of the test chamber 5, and the test chamber 5 is for collecting
The pulse signal of buried cable, electric-field sensor 3, magnetic field sensor 4 can detect pulse signal, and detector 1 can receive and place
The two pulse signals that reason electric-field sensor 3 and magnetic field sensor 4 provide, and according to the arrival of pulse in two pulse signals
Sequentially, intensity and frequency judge the active level with the presence or absence of shelf depreciation and electric discharge in cable.
The electric-field sensor 3 includes shell 31, the electrode 32 being set in shell 31, lead 33, resistance 34, discharge tube
35 and BNC connectors 36.
The magnetic field sensor 4 includes shell 41, the coil 42 being set in shell 41, resistance 43, discharge tube 44 and BNC
Connector 45.
The detector 1 include shell 11, the BNC connectors 12 being set in shell 11, filter 13, signal amplification and
Sample circuit 14, processor 15 and display screen 16, wherein BNC connectors 12, filter 13, signal amplification and sample circuit 14,
Processor 15 and display screen 16 are contacted successively；The display screen 16 is used to show the waveform of two pulse signals.
The shell is insulating materials.
The operation principle and the course of work of the present invention is as follows：
Detection chamber enclosure 51 is rectangular shape, can test chamber 1 be embedded to underground so that buried cable passes through, and works as electricity
When cable occurs damaged, the cable inner core at damaged crust forms internal field and local magnetic field, electric-field sensor 3, magnetic field sensing
Device 4 can detect pulse signal, the two-way arteries and veins that detector 1 can receive and processing is provided by electric-field sensor 3 and magnetic field sensor 4
Signal is rushed, and according to the order of arrival, intensity and frequency of pulse in two pulse signals, judges to put with the presence or absence of part in cable
Electricity and the active level of electric discharge.
Embodiment two
As shown in fig. 6-7：The detection chamber enclosure 51 is semi-spherical shape, and test chamber 1 can be placed on to the ground for being embedded with cable
On, when cable occurs damaged, the cable inner core at damaged crust forms internal field and local magnetic field, electric-field sensor 3, magnetic
Field sensor 4 can detect pulse signal, and detector 1 can receive and processing provides by electric-field sensor 3 and magnetic field sensor 4
Two pulse signals, and according to the order of arrival, intensity and frequency of pulse in two pulse signals, judge to whether there is in cable
Shelf depreciation and the active level of electric discharge.
The above described is only a preferred embodiment of the present invention, being not that the invention has other forms of limitations, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But it is every without departing from technical solution of the present invention content, according to the technical essence of the invention to above example institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection domain of technical solution of the present invention.
Claims (7)
1. buried cable local discharge detection device, including a detector, and be connected therewith by signal-transmitting cable
Electric-field sensor, magnetic field sensor, it is characterised in that：Further include a test chamber, the test chamber includes shell and ontology, described
Ontology is attached to the inner surface of the shell；
The electric-field sensor, magnetic field sensor are arranged at the top of the test chamber, and the test chamber is for collecting underground
The pulse signal of cable, electric-field sensor, magnetic field sensor can detect pulse signal, and detector can receive and handle by electric field
The two pulse signals that sensor and magnetic field sensor provide, and according to the order of arrival, intensity of pulse in two pulse signals
And frequency, judge the active level with the presence or absence of shelf depreciation and electric discharge in cable.
2. buried cable local discharge detection device according to claim 1, it is characterised in that：The electric-field sensor packet
Electrode, lead, resistance, discharge tube and the BNC connectors for including shell, being set in shell.
3. buried cable local discharge detection device according to claim 1, it is characterised in that：The magnetic field sensor packet
Coil, resistance, discharge tube and the BNC connectors for including shell, being set in shell.
4. buried cable local discharge detection device according to claim 2, it is characterised in that：The detector includes shell
Body, the BNC connectors being set in shell, filter, signal amplification and sample circuit, processor and display screen, wherein BNC
Connector, filter, signal amplification and sample circuit, processor and display screen are contacted successively；The display screen is for showing two-way
The waveform of pulse signal.
5. buried cable local discharge detection device according to claim 1, it is characterised in that：The detection chamber enclosure is
Rectangular shape.
6. buried cable local discharge detection device according to claim 6, it is characterised in that：The detection chamber enclosure is
Semi-spherical shape.
7. the buried cable local discharge detection device according to Claims 2 or 3 or 4, it is characterised in that：The shell is equal
For insulating materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810828106.9A CN108680842A (en) | 2018-07-25 | 2018-07-25 | Buried cable local discharge detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810828106.9A CN108680842A (en) | 2018-07-25 | 2018-07-25 | Buried cable local discharge detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108680842A true CN108680842A (en) | 2018-10-19 |
Family
ID=63814934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810828106.9A Pending CN108680842A (en) | 2018-07-25 | 2018-07-25 | Buried cable local discharge detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108680842A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324235A (en) * | 2018-09-29 | 2019-02-12 | 国网山西省电力公司太原供电公司 | A kind of sensor device of cable connector electric field detection |
| CN110308368A (en) * | 2019-07-05 | 2019-10-08 | 哈尔滨理工大学 | A kind of cable intermediate head partial discharge on-Line Monitor Device |
| CN117092455A (en) * | 2022-11-01 | 2023-11-21 | 特变电工山东鲁能泰山电缆有限公司 | Partial discharge detection device and partial discharge detection system |
-
2018
- 2018-07-25 CN CN201810828106.9A patent/CN108680842A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324235A (en) * | 2018-09-29 | 2019-02-12 | 国网山西省电力公司太原供电公司 | A kind of sensor device of cable connector electric field detection |
| CN110308368A (en) * | 2019-07-05 | 2019-10-08 | 哈尔滨理工大学 | A kind of cable intermediate head partial discharge on-Line Monitor Device |
| CN117092455A (en) * | 2022-11-01 | 2023-11-21 | 特变电工山东鲁能泰山电缆有限公司 | Partial discharge detection device and partial discharge detection system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181019 |