CN207924074U - A kind of plug-in cable connector partial discharge sensor - Google Patents
A kind of plug-in cable connector partial discharge sensor Download PDFInfo
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- CN207924074U CN207924074U CN201820305151.1U CN201820305151U CN207924074U CN 207924074 U CN207924074 U CN 207924074U CN 201820305151 U CN201820305151 U CN 201820305151U CN 207924074 U CN207924074 U CN 207924074U
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- partial discharge
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Abstract
The utility model provides a kind of plug-in cable connector partial discharge sensor, which includes membrane electrode and signal wire；Signal wire is connect with the membrane electrode by solder joint, and signal wire includes that one end exposing copper shield braid over braid and core, core are connect with the membrane electrode by solder joint, can detect local discharge signal.Sensor structure is simple, and installation process does not destroy the shielding construction of cable, compared to external partial discharge sensor, there is preferable interference free performance.
Description
Technical field
The utility model is related to power cable Partial Discharge Detecting Technology fields, more particularly, to a kind of plug-in type electricity
Cable joint partial discharge sensor.
Background technology
After cable puts into operation, long-term same soil, moisture, moisture contact, insulation are vulnerable to corrosion penetration, add cable
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, accident frequent occurrence, causes huge economic damage caused by due to cable connector generation explosion
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.But it needs first to cut off the metallic shield of a part of cable body before installation sensor, after installing
It need to restore shielded layer with materials such as metal flanges, technique is vulnerable to the restriction of environment, it is difficult to ensure the machine of cable cover(ing) after restoring
Tool performance, sealing performance and antiseptic property may shorten insulation life, be unfavorable for the longtime running of cable.
Utility model content
The utility model provides a kind of plug-in cable connector partial discharge sensor, and the sensor structure is simple, installation process
The shielding construction of cable is not destroyed.
In order to reach above-mentioned technique effect, the technical solution of the utility model is as follows：
A kind of plug-in cable connector partial discharge sensor, which is characterized in that including membrane electrode and signal wire；Signal wire with
The membrane electrode is connected by solder joint.
Further, the signal wire includes that copper shield braid over braid and core, core and the membrane electrode are exposed in one end
It is connected by solder joint.
Preferably, the signal wire is coaxial signal lines.
Preferably, the membrane electrode is sheet metal.
Further, the part that the signal wire core is not contacted with the membrane electrode coats an insulating layer.
Compared with prior art, the advantageous effect of technical solutions of the utility model is：
The utility model includes membrane electrode and signal wire；Signal wire is connect with the membrane electrode by solder joint, signal
Line includes that one end exposing copper shield braid over braid and core, core are connect with the membrane electrode by solder joint, can detect part
Discharge signal.Sensor structure is simple, and installation process does not destroy the shielding construction of cable, compared to external partial discharge sensor,
There is preferable interference free performance.
Description of the drawings
Fig. 1 is a kind of plug-in cable connector partial discharge sensor structure schematic diagram that the utility model embodiment provides；
Fig. 2 is the plug-in cable connector partial discharge sensor mounting location schematic diagram that the utility model embodiment provides；
Fig. 3 is that the plug-in cable connector partial discharge sensor that the utility model embodiment provides installs local detail signal
Figure；
Fig. 4 is the equivalent circuit diagram that plug-in type partial discharge sensor couples Partial discharge signal；
Wherein：1- membrane electrodes；2- coaxial signal lines；3- solder joints；4- copper shield braid over braids；5- insulating layers；6- believes
Number wire core；The prefabricated insulating part of 7- cable connectors；8- partial discharge measuring instruments；9- cable connector waterproof layers；10- cable bodies；11- is exhausted
Edge adhesive tape；12- metal mask tapes；13- cable outer semiconducting layers；14- cable insulations；15- power cable cores.
Specific implementation mode
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
In order to more preferably illustrate that the present embodiment, the certain components of attached drawing have omission, zoom in or out, actual product is not represented
Size；
To those skilled in the art, it is to be appreciated that certain known features and its explanation, which may be omitted, in attached drawing
's.
The technical solution of the utility model is described further with reference to the accompanying drawings and examples.
Embodiment 1
As shown in Figs. 1-2, the plug-in cable connector partial discharge sensor of the present embodiment, including membrane electrode 1 and one end dew
The coaxial signal lines 2 of copper shielding braid band 4 and core 6, signal wire core 6 are connect with membrane electrode 1 by solder joint 3,
An insulating layer 5 is coated in the part that signal wire core 6 is not contacted with membrane electrode 1, core and copper shield braid over braid is isolated.Its
In, for membrane electrode 1 using the copper foil of thickness 0.08mm, insulating layer 5 is PVC insulating tapes.
As shown in figure 3, the present embodiment by taking 10kV cable connectors as an example, introduces the installation of plug-in cable connector partial discharge sensor
Method includes the following steps：
Step 1：The copper strip shielding 12 of 10kV cables 10 is unfolded, outer semiconducting layer 13 is exposed；
Step 2：By 1 tight of membrane electrode of partial discharge sensor on cable outer semiconducting layer 13；
Step 3：Wrapped one layer of insulating tape 11, fully wrapped around by the membrane electrode 1 outside membrane electrode 1；
Step 4：The copper strip shielding 12 for restoring cable 10, by 1 all standing of membrane electrode, coaxial signal lines core 6 from
Copper strip shielding 12 passes through in wrapped gap；
Step 5：The copper shield braid over braid 4 and copper strip shielding 12 of coaxial signal lines 2 are closely viscous by insulating tape 11
It connects；
Step 6：Coaxial signal lines 2 are pierced by from cable connector waterproof layer 9.
The principle of the invention is：Partial Discharge Sources inside the prefabricated insulating part of cable connector 7 are considered as a pulse power,
It is propagated to both ends by cable core 15 and metal mask tape 12, and generates electromagnetic distu, generated and change over time in space
Electromagnetic wave.Since the coaxial configuration of cable 10 is considered as the waveguide of electromagnetic wave, this electromagnetic pulse can be passed along cable
It broadcasts.The impedance under power-frequency voltage of outer semiconducting layer 13 is much smaller than the impedance of insulating layer 14, then can be considered with metal mask tape 12 etc.
Current potential (i.e. ground potential), therefore membrane electrode 1 does not interfere with the insulation effect of power cable 10；Under partial discharge high frequency condition, partly lead outside
The impedance of electric layer 13 and 14 impedance of insulating layer are comparable, between the membrane electrode 1 and metal mask tape 12 on 13 surface of outer semiconducting layer
Potential difference can be formed, to detect partial discharge voltage signal.
Fig. 4 couples the equivalent circuit diagram of Partial discharge signal for plug-in type partial discharge sensor, and C1 is membrane electrode 1 and cable core in figure
Capacitance between 15, capacitances of the C2 between membrane electrode 1 and metal mask tape 12, Ls are coaxial signal lines core 6
Inductance, ZL are the internal impedance of partial discharge measuring instrument 8, and Z01, Z02 are the characteristic impedance of cable 10.Shelf depreciation is generated at cable A
When, pulse signal can be propagated axially, will produce radial current when reaching B points, to generate voltage, the both ends ZL at the both ends OC
Voltage Uo is the voltage that partial discharge measuring instrument 8 is detected.
The same or similar label correspond to the same or similar components；
Position relationship described in attached drawing is used to 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 pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
All any modification, equivalent and improvement etc., should be included in the claims in the present invention made by within the spirit and principle of invention
Protection domain within.
Claims (5)
1. a kind of plug-in cable connector partial discharge sensor, which is characterized in that including membrane electrode (1) and signal wire (2)；Signal
Line (2) is connect with the membrane electrode (1) by solder joint (3).
2. plug-in cable connector partial discharge sensor according to claim 1, which is characterized in that signal wire (2) packet
It includes one end exposing copper shield braid over braid (4) and core (6), core (6) is connect with the membrane electrode (1) by solder joint (3).
3. plug-in cable connector partial discharge sensor according to claim 1, which is characterized in that the signal wire (2) is
Coaxial signal lines.
4. plug-in cable connector partial discharge sensor according to claim 1, which is characterized in that the membrane electrode (1)
For sheet metal.
5. plug-in cable connector partial discharge sensor according to claim 2, which is characterized in that the signal wire core
(6) part not contacted with the membrane electrode (1) coats an insulating layer (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820305151.1U CN207924074U (en) | 2018-03-05 | 2018-03-05 | A kind of plug-in cable connector partial discharge sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820305151.1U CN207924074U (en) | 2018-03-05 | 2018-03-05 | A kind of plug-in cable connector partial discharge sensor |
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| Publication Number | Publication Date |
|---|---|
| CN207924074U true CN207924074U (en) | 2018-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820305151.1U Active CN207924074U (en) | 2018-03-05 | 2018-03-05 | A kind of plug-in cable connector partial discharge sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108519543A (en) * | 2018-03-05 | 2018-09-11 | 广东电网有限责任公司佛山供电局 | A kind of plug-in cable connector partial discharge sensor and its installation method |
-
2018
- 2018-03-05 CN CN201820305151.1U patent/CN207924074U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108519543A (en) * | 2018-03-05 | 2018-09-11 | 广东电网有限责任公司佛山供电局 | A kind of plug-in cable connector partial discharge sensor and its installation method |
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