CN109270411A - A kind of partial discharge of power cable connector detection electromagnetic interference shielding device - Google Patents
A kind of partial discharge of power cable connector detection electromagnetic interference shielding device Download PDFInfo
- Publication number
- CN109270411A CN109270411A CN201710583069.5A CN201710583069A CN109270411A CN 109270411 A CN109270411 A CN 109270411A CN 201710583069 A CN201710583069 A CN 201710583069A CN 109270411 A CN109270411 A CN 109270411A
- Authority
- CN
- China
- Prior art keywords
- current transformer
- power cable
- cable connector
- wire
- partial discharge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims description 12
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 239000003292 glue Substances 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 6
- 239000011889 copper foil Substances 0.000 claims description 5
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 239000005030 aluminium foil Substances 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- 239000010985 leather Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000009131 signaling function Effects 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 230000007246 mechanism Effects 0.000 abstract description 3
- 239000011888 foil Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000007704 transition Effects 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
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
A kind of partial discharge of power cable connector of the present invention detects electromagnetic interference shielding device, it provides the present invention two ends are respectively welded at HF current transformer in metal sheet capacitance to through connecting lead wire, and two metal sheet capacitances is respectively welded on the shielded layer at insulating washer both ends of insulated cable connector；Conducting wire and HF current transformer are wrapped up in signal shielding paper bag, and expose the BNC connector part of wire termination and HF current transformer, the BNC connector outer wall and signal shielding paper of HF current transformer are connected and fixed with conductive glue；Wire termination and metal sheet capacitance outer wall are covered with insulating tape；The mechanism can effectively reduce the interference of external electromagnetic signal.
Description
Technical field
The present invention relates to on-line monitoring of cable technical fields, more particularly, to a kind of partial discharge of power cable connector
Detect electromagnetic interference shielding device.
Background technique
Power cable is important component indispensable in electric system, carries the important task of transmission electric energy.According to not
Statistics completely, as the failure of cable connector caused by the ratio of high-tension cable operation troubles be up to 39%, a portion allusion quotation
The failure of type is caused by shelf depreciation, therefore must be taken seriously to the detection of the shelf depreciation of power cable connector.
Cable in manufacture and connector manufacturing process, the impurity that occurs inside insulating layer, micropore, semi-conductive layer protrusion and point
The defects of layer, it can cause the generation of shelf depreciation.Shelf depreciation develops into electric tree by accumulation, eventually leads to hitting for major insulation
It wears.If can be found at the initial stage of apparatus insulated deterioration, possible trouble can be preventive from.Cable local discharge failure is most
Number betides at cable accessory, especially transition joint.
Partial Discharge Sources inside power cable insulation can be regarded as a pulse signal source, when insulating inner generation office
When portion discharges, discharging generated pulse signal can be along cable metallic screens Es-region propagations.Due to the insulating joint of power cable
Shielded layer separated by insulating washer, be electrically disconnect, generally can by cable connector disconnect shielded layer both ends
Connecting wire with metal sheet capacitance is attached, and makes that shelf depreciation production can be capacitively coupled in connecting wire by metal foil
Raw pulsed current signal, then with the signal on signal measurement apparatus detection connecting line to determine whether producing shelf depreciation.
But since connecting wire is in external environment, the electromagnetic interference signal of surrounding is easy to be coupled to connection by stray capacitance
On line, the signal detected is caused to have differences with practical local discharge signal.
Summary of the invention
The present invention is to provide a kind of partial discharge of power cable connector detection electromagnetic interference shielding device, which can reduce
The interference of external electromagnetic signal.
In order to reach above-mentioned technical effect, technical scheme is as follows:
A kind of partial discharge of power cable connector detection electromagnetic interference shielding device, including detection unit and screen unit,
The detection unit includes HF current transformer, metal sheet capacitance and connecting lead wire；The both ends of the HF current transformer
One end of metal sheet capacitance is connected to through connecting lead wire, one end that metal sheet capacitance is not connect with connecting lead wire is connected to electric power electricity
On the shielded layer of cable joint；The screen unit is coated on connecting lead wire and HF current transformer.
Preferably, it is rubber insulating leather that the connecting lead wire, which is outer layer, and internal core is the conducting wire of copper wire, and conductor length is
40cm~50cm, diameter of wire are 2mm~5mm, and 1cm core is respectively exposed in two ends.
Preferably, the HF current transformer be internal diameter be 5cm~10cm, outer diameter 15cm~20cm, width 5cm~
The ring-type current sensors of 10cm, outer wall have a BNC connector, when have the conducting wire for being connected with high-frequency current pass through high-frequency current
When mutual inductor, HF current transformer can detect current signal, and spread out of from BNC connector.
Preferably, the metal sheet capacitance is the capacitor that upper and lower pole plate is made of copper foil, centre is dielectric, one
Pole plate is welded on the core of connecting lead wire exposing with scolding tin, and another pole plate is welded on the shielded layer of power cable connector with scolding tin
On.
Preferably, insulating tape is covered in connecting lead wire and metal sheet capacitance；The insulating tape is to have insulating properties
The sticking adhesive tape of one-side band, the component of the described insulating tape covering is part and the metal foil of the exposed core of connecting wire
Capacitive part.
Further, the connecting lead wire and HF current transformer are wrapped up with screen unit, and expose wire termination and
The BNC connector part of HF current transformer, the BNC connector outer wall and screen unit of HF current transformer are connected with conductive glue
Connect fixation；The conductive glue is has sticking conducting liquid after a kind of drying or solidification, the volume after drying or solidifying
Resistance is less than 3m Ω/mm2；The screen unit is the paper-like copper foil for having shielding electromagnetic signal function, aluminium foil, tinfoil paper or its conjunction
Gold is constituted.
Compared with prior art, the beneficial effect of technical solution of the present invention is:
Two ends are respectively welded in metal sheet capacitance by the present invention by HF current transformer through connecting lead wire, and will
Two metal sheet capacitances are respectively welded on the shielded layer at insulating washer both ends of insulated cable connector；By conducting wire and high-frequency current
Mutual inductor is wrapped up in signal shielding paper bag, and exposes the BNC connector part of wire termination and HF current transformer, and high-frequency current is mutual
The BNC connector outer wall and signal shielding paper of sensor are connected and fixed with conductive glue；Wire termination and metal sheet capacitance outer wall are used
Insulating tape covering；The mechanism can effectively reduce the interference of external electromagnetic signal.
Detailed description of the invention
Fig. 1 is mechanism map of the invention；
Fig. 2 is HF current transformer structural schematic diagram；
Fig. 3 is metal foil capacitance structure schematic diagram.
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 actual product
Size；
To those skilled in the art, it is to be understood that certain known features and its explanation, which may be omitted, in attached drawing
's.
The following further describes the technical solution of the present invention with reference to the accompanying drawings and examples.
Embodiment 1
As shown in Figure 1-3, a kind of partial discharge of power cable connector detects electromagnetic interference shielding device, including detection unit
With screen unit 6, the detection unit includes HF current transformer 1, metal sheet capacitance 2 and connecting lead wire 3；The high-frequency electrical
The both ends of current transformer 1 are connected to one end of metal sheet capacitance 2 through connecting lead wire 3, and metal sheet capacitance 2 does not connect with connecting lead wire 3
The one end connect is connected on the shielded layer of power cable connector；The screen unit 6 is coated on connecting lead wire 3 and high-frequency current is mutual
On sensor 1.
Connecting lead wire 3 be outer layer be rubber insulating leather, internal core be copper wire conducting wire, conductor length be 40cm~
50cm, diameter of wire are 2mm~5mm, and 1cm core is respectively exposed in two ends.
HF current transformer 1 is that internal diameter is 5cm~10cm, outer diameter 15cm~20cm, the annular electro of width 5cm~10cm
Flow sensor, outer wall have a BNC connector 4, high when there is the conducting wire for being connected with high-frequency current to pass through HF current transformer
Frequency current transformer can detect current signal, and spread out of from BNC connector 4.
Metal sheet capacitance 2 is the capacitor that upper and lower pole plate is made of copper 2-2, centre is dielectric 2-1, and a pole plate is used
Scolding tin is welded on the core of the exposing of connecting lead wire 3, and another pole plate is welded on the shielded layer of power cable connector with scolding tin.
Insulating tape 5 is covered in connecting lead wire 3 and metal sheet capacitance 2；The insulating tape 5 is the list for having insulating properties
The sticking adhesive tape of face band, the component that the insulating tape 5 covers are part and the metal foil electricity of the exposed core of connecting wire 3
Hold part.
Connecting lead wire 3 and HF current transformer 2 are wrapped up with screen unit 6, and expose wire termination and high-frequency current is mutual
4 part of BNC connector of sensor, the BNC connector outer wall and screen unit 6 of HF current transformer are connected and fixed with conductive glue；
The conductive glue is a kind of drying or has sticking conducting liquid after solidifying, and the volume resistance after drying or solidifying is less than
3mΩ/mm2；The screen unit 6 is that the paper-like copper foil for having shielding electromagnetic signal function, aluminium foil, tinfoil paper or its alloy are constituted.
The same or similar label correspond to the same or similar components；
Described in attached drawing positional relationship for 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
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (6)
1. a kind of partial discharge of power cable connector detects electromagnetic interference shielding device, which is characterized in that including detection unit and
Screen unit (6), the detection unit include HF current transformer (1), metal sheet capacitance (2) and connecting lead wire (3)；It is described
The both ends of HF current transformer (1) are connected to one end of metal sheet capacitance (2) through connecting lead wire (3), and metal sheet capacitance (2) is not
The one end connecting with connecting lead wire (3) is connected on the shielded layer of power cable connector；The screen unit (6) is coated on connection
On lead (3) and HF current transformer (1).
2. partial discharge of power cable connector according to claim 1 detects electromagnetic interference shielding device, which is characterized in that
The connecting lead wire (3) is that outer layer is rubber insulating leather, and internal core is the conducting wire of copper wire, and conductor length is 40cm~50cm,
Diameter of wire is 2mm~5mm, and 1cm core is respectively exposed in two ends.
3. partial discharge of power cable connector according to claim 1 detects electromagnetic interference shielding device, which is characterized in that
The HF current transformer (1) is that internal diameter is 5cm~10cm, outer diameter 15cm~20cm, the ring current of width 5cm~10cm
Sensor, outer wall have a BNC connector (4), high when there is the conducting wire for being connected with high-frequency current to pass through HF current transformer
Frequency current transformer can detect current signal, and spread out of from BNC connector (4).
4. partial discharge of power cable connector according to claim 1 detects electromagnetic interference shielding device, which is characterized in that
The metal sheet capacitance (2) is the capacitor that upper and lower pole plate is made of copper foil (2-2), centre is dielectric (2-1), a pole
Plate is welded on the core of connecting lead wire (3) exposing with scolding tin, and another pole plate is welded on the shielding of power cable connector with scolding tin
On layer.
5. partial discharge of power cable connector according to claim 1 detects electromagnetic interference shielding device, which is characterized in that
Insulating tape (5) are covered on connecting lead wire (3) and metal sheet capacitance (2)；The insulating tape (5) is the list for having insulating properties
The component of the sticking adhesive tape of face band, the insulating tape (5) covering is the part and metal of connecting wire (3) exposed core
Sheet capacitance part.
6. partial discharge of power cable connector according to claim 3 detects electromagnetic interference shielding device, which is characterized in that
The connecting lead wire (3) and HF current transformer (2) are wrapped up with screen unit (6), and expose wire termination and high-frequency current
The BNC connector part of mutual inductor, the BNC connector outer wall of HF current transformer connect solid with screen unit (6) with conductive glue
It is fixed；The conductive glue is has sticking conducting liquid after a kind of drying or solidification, the volume resistance after drying or solidifying
Less than 3m Ω/mm2；The screen unit (6) is the paper-like copper foil for having shielding electromagnetic signal function, aluminium foil, tinfoil paper or its conjunction
Gold is constituted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710583069.5A CN109270411A (en) | 2017-07-17 | 2017-07-17 | A kind of partial discharge of power cable connector detection electromagnetic interference shielding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710583069.5A CN109270411A (en) | 2017-07-17 | 2017-07-17 | A kind of partial discharge of power cable connector detection electromagnetic interference shielding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109270411A true CN109270411A (en) | 2019-01-25 |
Family
ID=65147903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710583069.5A Pending CN109270411A (en) | 2017-07-17 | 2017-07-17 | A kind of partial discharge of power cable connector detection electromagnetic interference shielding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109270411A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111736717A (en) * | 2020-07-03 | 2020-10-02 | 北京铁路信号有限公司 | KVM integrated machine and method for improving electromagnetic compatibility of electronic product |
| CN111880065A (en) * | 2020-07-16 | 2020-11-03 | 广东电网有限责任公司 | Built-in metal foil electrode sensor and preparation method thereof |
| CN112881950A (en) * | 2021-01-14 | 2021-06-01 | 四川九通智路科技有限公司 | Cable joint temperature, voltage and position monitoring system and method |
| CN113917195A (en) * | 2021-09-13 | 2022-01-11 | 华中科技大学 | Cable insulation diagnostic device anchor clamps of anti-electromagnetic interference |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111736717A (en) * | 2020-07-03 | 2020-10-02 | 北京铁路信号有限公司 | KVM integrated machine and method for improving electromagnetic compatibility of electronic product |
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| CN113917195A (en) * | 2021-09-13 | 2022-01-11 | 华中科技大学 | Cable insulation diagnostic device anchor clamps of anti-electromagnetic interference |
| CN113917195B (en) * | 2021-09-13 | 2022-11-11 | 华中科技大学 | Cable insulation diagnostic device anchor clamps of anti-electromagnetic interference |
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