CN108919076A - A kind of bipolar implanted cable connector partial discharge sensor - Google Patents
A kind of bipolar implanted cable connector partial discharge sensor Download PDFInfo
- Publication number
- CN108919076A CN108919076A CN201810885532.6A CN201810885532A CN108919076A CN 108919076 A CN108919076 A CN 108919076A CN 201810885532 A CN201810885532 A CN 201810885532A CN 108919076 A CN108919076 A CN 108919076A
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- Prior art keywords
- partial discharge
- cable connector
- membrane electrode
- bipolar
- discharge sensor
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- 239000012528 membrane Substances 0.000 claims abstract description 40
- 229910052802 copper Inorganic materials 0.000 claims abstract description 14
- 239000010949 copper Substances 0.000 claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 238000002513 implantation Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 44
- 238000009413 insulation Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 241000555268 Dendroides Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000009331 sowing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
A kind of bipolar implanted cable connector partial discharge sensor, including internal layer membrane electrode, outer membrane electrode, coaxial signal line, copper shield braid over braid, the coaxial signal line includes being enclosed with the shielded layer outside signal wire core and shielded layer, the cable core, wherein, the internal layer membrane electrode and the signal wire core weld, and the outer membrane electrode is welded by the copper shield braid over braid and the shielded layer.The present invention is realized realizes the measurement of cable connector partial discharge under the premise of not destroying cable shield structure.
Description
Technical field
The present invention relates to power cable Partial Discharge Detecting Technology fields, more particularly, to a kind of bipolar implanted electricity
Cable joint partial discharge sensor.
Background technique
After cable puts into operation, long-term same soil, moisture, moisture contact, insulation add cable vulnerable to corrosion penetration
Local defect when manufacture or attachment are installed, in electricity, heat, mechanical external force, water, oil, organic compound, acid, alkali, salt and microorganism
Under effect, it occur frequently that the aging of insulation.And cable connector insulate due to being that field fabrication is completed and is often easier to ask
Topic, in actual operation, as cable connector occur explosion and caused by accident frequent occurrence, cause huge economic damage
It loses.Show with shelf depreciation, operating experience and research simultaneously during insulation ag(e)ing：Power cable partial discharge quantity with
Power cable insulation situation is closely related, and the variation of partial discharge quantity reflects the presence of potential risk to a certain extent, is quantitative
Analyze one of the effective ways of dendroid degradation.Therefore, the worlds such as home and abroad experts and scholars, IEC, IEEE and CIGRE
Electric power authoritative institution unanimously recommends Partial Discharge Detection as the best approach of power cable insulation status evaluation.Part is put at present
Electro-detection is being widely used, and measurement point is mainly cable connector.
Have much for the method for power cable Partial Discharge Detection both at home and abroad, traditional built-in partial discharge detection sensor
Generally directed to the cable connector of 110kV or more, local discharge signal is detected by capacitive coupling principle, there is centainly anti-interference
Ability and higher sensitivity.About installation sensor, there are two types of situations, first is that needing first to cut off a part of cable body before installation
Metallic shield, need after the installation is completed with the materials such as metal flange restore shielded layer, restriction of the technique vulnerable to environment, it is difficult to protect
Mechanical performance, sealing performance and the antiseptic property of cable cover(ing), may shorten insulation life, be unfavorable for cable after card restores
Longtime running；Second is that plug-in cable connector partial discharge sensor, needs that cable metallic screens are first unfolded before installation, by sensor arrangement
Outside cable connector outer semiconducting layer, restore copper shield again after installing, the sensor structure is simple, is not required to destroy electricity
The shielding construction of cable, but inconvenience is installed, and electric field cannot be shielded.
Summary of the invention
The present invention in order to overcome at least one of the drawbacks of the prior art described above, provides a kind of bipolar implanted cable connector
Partial discharge sensor.
The present invention is directed to solve above-mentioned technical problem at least to a certain extent.
Primary and foremost purpose of the invention is that the measurement of cable connector partial discharge is realized under the premise of not destroying cable shield structure.
In order to solve the above technical problems, technical scheme is as follows：
A kind of bipolar implanted cable connector partial discharge sensor, including internal layer membrane electrode, outer membrane electrode, coaxial signal
Line, copper shield braid over braid, coaxial signal line include cable core and shielded layer, are enclosed with shielded layer outside cable core, wherein：
Internal layer membrane electrode and cable core weld；
Outer membrane electrode is welded by copper shield braid over braid and shielded layer.
This method forms capacitance structure by internal layer membrane electrode and outer membrane electrode to realize to power cable connector
Partial discharge signal is absorbed and is measured by the capacitive coupling of partial discharge voltage.
Preferably, outer membrane electrode is wider than internal layer membrane electrode, plays shielding action, can reduce copper shield around inclusion
The irregular influence of structure interior shape.
Preferably, PVC rubber mat is placed between outer membrane electrode and internal layer membrane electrode, PVC rubber mat is in being isolated
Outer membrane electrode makes it keep a fixed spacing, improves coupling effect.
Preferably, bipolar implanted cable connector partial discharge sensor is disposed in proximity to the outer of the power cable at cable connector
Outside semi-conductive layer, since impedance is much smaller than the impedance of insulating layer to outer semiconducting layer under low-frequency voltage, then it can be considered and metal screen
A layer equipotential (i.e. ground potential) is covered, therefore membrane electrode will not influence the insulation performance of power cable；Under high frequency condition, outer semiconductive
The impedance and insulation layer impedance of layer are in an order of magnitude, meeting between the membrane electrode and metal screen layer on outer semiconducting layer surface
Potential difference is formed, when shelf depreciation generates pulse signal, the capacitor of metal electrode and metallic shield interlayer can detect that voltage is believed
Number.
It preferably, further include metal mask tape, metal mask tape is wrapped in bipolar implanted cable connector partial discharge sensor
Outer layer.Shield the random disturbances of external environment.
Preferably, there is waterproof layer at cable connector, guarantee that power cable drain conditions will not occur in rainy day or moist day.
Compared with prior art, the beneficial effect of technical solution of the present invention is：
Using the membrane electrode being set between the power cable outer semiconducting layer and metallic shield of cable connector, coupling is incuded
Partial Discharge Sources are closed, Partial discharge signal is absorbed, in being sent into partial discharge detection instrument, realize the partial discharge detection of cable connector, and do not destroy
Cable shield structure.
Detailed description of the invention
Fig. 1 is bipolar implanted cable connector partial discharge sensor structure schematic diagram provided in an embodiment of the present invention.
Fig. 2 is bipolar implantation cable connector partial discharge sensor mounting location schematic diagram provided in an embodiment of the present invention.
Fig. 3 is that bipolar implantation cable connector partial discharge sensor provided in an embodiment of the present invention installs local detail schematic diagram.
Fig. 4 is the schematic diagram that bipolar implanted partial discharge sensor provided by the invention couples Partial discharge signal.
In figure, 1-- outer membrane electrode；2-- internal layer membrane electrode；3-- solder joint；4-- copper shield braid over braid；
5-- coaxial signal wire core；6-- coaxial signal line；7-- partial discharge measuring instrument；8-- cable connector；9-- power cable；
10-- metal mask tape；11--PVC rubber mat；12-- cable outer semiconducting layer；13-- cable core.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
In order to better illustrate this embodiment, the certain components of attached drawing have omission, zoom in or out, and do not represent the ruler of actual product
It is very little；
To those skilled in the art, the omitting of some known structures and their instructions in the attached drawings are understandable.
The following further describes the technical solution of the present invention with reference to the accompanying drawings and examples.
Embodiment 1
A kind of bipolar implanted cable connector partial discharge sensor provided in this embodiment, structural schematic diagram such as Fig. 1, mounting means
Such as Fig. 2, part installs detailed schematic such as Fig. 3, is disposed in proximity to the outer semiconducting layer 12 of the power cable at cable connector 8
Outside, the outer layer packet of bipolar implanted cable connector partial discharge sensor has crossed metal mask tape 10, including internal layer membrane electrode 2, outer
Layer film electrode 1, coaxial signal line 6, copper shield braid over braid 4, coaxial signal line 6 include signal wire core 5 and shielded layer, cable core
5 outsides are enclosed with shielded layer, wherein：
Internal layer membrane electrode 2 and signal wire core 5 weld；
Outer membrane electrode 1 is welded by copper shield braid over braid 4 and shielded layer；
Outer membrane electrode 1 is wider than the internal layer membrane electrode 2；
PVC rubber mat 11 is placed between outer membrane electrode 1 and the internal layer membrane electrode 2；
It further include partial discharge measuring instrument 7, partial discharge measuring instrument 7 is connected with coaxial signal line 6；
There is waterproof layer at cable connector.
In the specific implementation process, the Partial Discharge Sources inside cable connector 8 can be regarded as a pulse power, pass through
Electric-cable core 13 and metal mask tape 10 are propagated to both ends, if in close proximity to the power cable outer semiconducting layer of cable connector 8
Built-in membrane electrode between 12 and metal mask tape 10, working principle such as Fig. 4 are passed when shelf depreciation generates steep-sided pulse along cable
Sowing time will act on intake Partial discharge signal by capacitive coupling between membrane electrode 1,2 and metal mask tape 10.Midium voltage cable is copper
Band shielding construction, copper shield are constituted by copper strips is wrapped, combine above-mentioned capacity coupled thought using this unique structure, double
Pole implanted partial discharge sensor is made of double-layer films electrode 1,2 and coaxial signal line 6, the cable core 5 of coaxial signal line and shielding
Internal layer electrode 2 and outer electrode 1 is respectively welded in layer, and internal layer electrode 2 couples Partial discharge signal, since outer semiconducting layer 12 is in low-frequency electrical
The impedance that impedance is much smaller than insulating layer is depressed, then can be considered and 10 equipotential of metal mask tape (i.e. ground potential), therefore membrane electrode
1,2 insulation performance that will not influence power cable 9；Under high frequency condition, the impedance and insulation layer impedance of outer semiconducting layer 12 are one
On a order of magnitude, it will form potential difference between the membrane electrode 1,2 and metal mask tape 10 on 12 surface of outer semiconducting layer, locally put
When electricity generates pulse signal, the capacitor between membrane electrode 1,2 and metal mask tape 10 can detect voltage signal, and transmit Incoming
Measuring instrument is put to measure.
The same or similar label correspond to the same or similar components；
The terms describing the positional relationship in the drawings are only for illustration, should not be understood as the limitation to this patent；
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be to this hair
The restriction of bright embodiment.For those of ordinary skill in the art, it can also do on the basis of the above description
Other various forms of variations or variation out.There is no necessity and possibility to exhaust all the enbodiments.It is all in the present invention
Spirit and principle within made any modifications, equivalent replacements, and improvements etc., should be included in the guarantor of the claims in the present invention
Within the scope of shield.
Claims (7)
1. a kind of bipolar implanted cable connector partial discharge sensor, which is characterized in that including internal layer membrane electrode（2）, outer layer it is thin
Membrane electrode（1）, coaxial signal line（6）, copper shield braid over braid（4）, the coaxial signal line（6）Including signal wire core（5）With
Shielded layer, the cable core（5）Outside is enclosed with the shielded layer, wherein：
The internal layer membrane electrode（2）With the signal wire core（5）Welding；
The outer membrane electrode（1）Pass through the copper shield braid over braid（4）It is welded with the shielded layer.
2. bipolar implanted cable connector partial discharge sensor according to claim 1, which is characterized in that the outer membrane
Electrode（1）Than the internal layer membrane electrode（2）It is wide.
3. bipolar implanted cable connector partial discharge sensor according to claim 1, which is characterized in that the outer membrane
Electrode（1）With the internal layer membrane electrode（2）Between be placed with PVC rubber mat（11）.
4. bipolar implanted cable connector partial discharge sensor according to claim 1, which is characterized in that further include that partial discharge is surveyed
Measure instrument（7）, the partial discharge measuring instrument（7）With the coaxial signal line（6）It is connected.
5. bipolar implanted cable connector partial discharge sensor according to claim 1, which is characterized in that the bipolar implantation
Formula cable connector partial discharge sensor is disposed in proximity to cable connector（8）The outer semiconducting layer of the power cable at place（12）Outside.
6. bipolar implanted cable connector partial discharge sensor according to claim 5, which is characterized in that further include metal screen
Shield tape（10）, the metal mask tape（10）It is wrapped in the outer layer of the bipolar implanted cable connector partial discharge sensor.
7. bipolar implanted cable connector partial discharge sensor according to claim 5, which is characterized in that the cable connector
Place is provided with waterproof layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810885532.6A CN108919076B (en) | 2018-08-06 | 2018-08-06 | Bipolar implantable cable joint partial discharge sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810885532.6A CN108919076B (en) | 2018-08-06 | 2018-08-06 | Bipolar implantable cable joint partial discharge sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108919076A true CN108919076A (en) | 2018-11-30 |
| CN108919076B CN108919076B (en) | 2024-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810885532.6A Active CN108919076B (en) | 2018-08-06 | 2018-08-06 | Bipolar implantable cable joint partial discharge sensor |
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| CN (1) | CN108919076B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337803A (en) * | 2020-03-20 | 2020-06-26 | 国网陕西省电力公司电力科学研究院 | Built-in high-voltage cable intermediate joint partial discharge detection and self-energy-taking integrated system and operation method thereof |
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| CN108919076B (en) | 2024-01-23 |
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