CN203275580U - XLPE power cable partial discharge sensor feeder system - Google Patents
XLPE power cable partial discharge sensor feeder system Download PDFInfo
- Publication number
- CN203275580U CN203275580U CN 201320299236 CN201320299236U CN203275580U CN 203275580 U CN203275580 U CN 203275580U CN 201320299236 CN201320299236 CN 201320299236 CN 201320299236 U CN201320299236 U CN 201320299236U CN 203275580 U CN203275580 U CN 203275580U
- Authority
- CN
- China
- Prior art keywords
- power cable
- feeder
- partial discharge
- xlpe power
- insulating layer
- 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.)
- Expired - Fee Related
Links
- 229920003020 cross-linked polyethylene Polymers 0.000 title claims abstract description 51
- 239000004703 cross-linked polyethylene Substances 0.000 title claims abstract description 51
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910052802 copper Inorganic materials 0.000 claims abstract description 48
- 239000010949 copper Substances 0.000 claims abstract description 48
- 238000009413 insulation Methods 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 9
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000010297 mechanical methods and process Methods 0.000 abstract 1
- 230000005226 mechanical processes and functions Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 45
- 238000007789 sealing Methods 0.000 description 15
- 210000001503 joint Anatomy 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 230000003750 conditioning effect Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 241000255925 Diptera Species 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000004588 polyurethane sealant Substances 0.000 description 1
- 239000012945 sealing adhesive Substances 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
Images
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The utility model relates to an XLPE power cable partial discharge sensor feeder system. One end of a feeder is connected with an UHF sensor, and the other end is connected with a waterproof N head. The waterproof N head is used to connect with a partial discharge detection device. In an actual mechanical process, the partial waterproof N head provides convenience for assembly and disassembly of the partial discharge detection device. In addition, a feeder copper grid is connected with ground, thereby effectively shielding noise signals and enhancing anti-interference performance of the feeder system.
Description
Technical Field
The utility model relates to a power cable partial discharge monitoring technology specifically is a XLPE power cable partial discharge sensor feeder system.
Background
Compared with the traditional overhead line power supply, the power supply of the XLPE (crosslinked polyethylene) power cable has the advantages of no influence of external environment, land saving, good electrical performance and the like. With the development of urban power grids, the utilization rate of the XLPE power cable is continuously improved, and the operation reliability of the XLPE power cable is concerned by power departments.
The cable has many reasons for faults, and through the statistical analysis of the operation faults of the cable, the faults are found to occur in the middle joint of the cable and the area nearby the middle joint. Because a large number of composite interfaces and electric field stress concentration phenomena exist in the middle joint, and the middle joint is installed and manufactured on site, the quality and the service life of the middle joint are greatly dependent on the manufacturing process and manual experience; the production level of field producers is not uniform, and due to artificial production factors, if the intermediate joints produced by the field producers are not too close, the possibility of potential quality hazards is higher. Because the power failure time of the faults is long, the repair is difficult, a large amount of material resources and manpower are wasted, the power failure loss which is difficult to estimate is brought, and partial discharge is often the main expression form of the cable joint fault in the early stage, so the partial discharge detection of the intermediate joint becomes the key point in the XLPE power cable discharge detection.
From the current inspection of XLPE power cables, it is common knowledge to implement partial discharge inspection techniques. The method has the advantages that partial discharge of key parts of the cable is effectively detected, the state information of the cable can be accurately acquired, the state maintenance level of the cable is improved, and the safe and stable operation of the cable is ensured. The cable structure and the operation environment are special, so that the partial discharge of the intermediate joint of the XLPE power cable is difficult to effectively detect, high-frequency current and ultrahigh-frequency electromagnetic waves are generated when the intermediate joint of the XLPE power cable generates partial discharge, and the partial discharge detection can be realized by utilizing a corresponding sensor to receive signals at a proper position.
Chinese patent document CN102096027A discloses a pre-buried sensor for detecting partial discharge of a power cable, which comprises a buffer layer, a ring electrode, a connecting cable, a leading-out terminal and a signal conditioning unit, wherein the buffer layer surrounds the outer side of the insulation of power cable accessories, and the inner side of the insulation of the power cable accessories is not in direct contact with a semi-conducting layer; the annular electrode surrounds the outer side of the buffer layer; the connecting cable is connected with the annular electrode through impedance matching and is used for connecting the annular electrode and the leading-out terminal; the leading-out terminal is fixedly connected with an opening on the power cable accessory shell; the leading-out terminal is connected with the signal conditioning unit. One end of an outgoing terminal connected with the connecting cable is welded at the opening of the shell of the power cable accessory, the other end of the outgoing terminal is connected with the signal conditioning unit, and an interface used for connecting partial discharge detection equipment is not arranged on the conditioning unit, so that the partial discharge detection equipment is inconvenient to install and disassemble in the actual use process.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve is because the inconvenient installation of trompil department and the problem of dismantling of partial discharge sensor feeder leading-out terminal one end welding on power cable annex casing among the prior art to a XLPE power cable partial discharge sensor feeder system is provided.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
a XLPE power cable partial discharge sensor feeder system comprises a UHF sensor, a feeder and a waterproof N head. Wherein,
the UHF sensor is annularly formed on the outer surface of an annular band-shaped insulating layer of the XLPE power cable accessory; the XLPE power cable accessory sequentially comprises an inner semi-conducting layer, an insulating layer and two outer semi-conducting layers from inside to outside, wherein a containing part for containing a core joint of an XLPE power cable is formed in the inner semi-conducting layer, the insulating layer is annularly wrapped on the outer side of the inner semi-conducting layer, the two outer semi-conducting layers are annularly wrapped on the outer side of the insulating layer and are respectively positioned at the end parts of the insulating layer, and a naked annular band-shaped insulating layer is arranged between the two outer semi-conducting layers;
the feeder line further comprises a wire core, a feeder line insulating layer and a feeder line copper mesh, wherein the feeder line insulating layer is positioned outside the wire core; wherein,
the cable core at one end of the feeder line is connected with the UHF sensor, and the other end of the feeder line is led out;
the feeder line copper mesh is grounded;
and the waterproof N head is connected with the leading-out end of the feeder line.
Still include the shielding cap, shielding cap detachably installs waterproof N is overhead.
The grounding copper net is connected with the two outer semi-conductive layers; meanwhile, the grounding copper mesh is connected with the feeder copper mesh.
The grounding copper net is characterized by further comprising a sealed copper shell arranged on the outer side of the grounding copper net, and a leading-out hole used for leading out the feeder line is formed in the sealed copper shell.
And the sealing glue layer is injected into the sealed copper shell through the lead-out hole and is formed.
The waterproof N head is fixedly arranged at the position of the lead-out hole.
The UHF sensor is an annular UHF sensor which is annularly formed on the outer surface of an annular band-shaped insulating layer of the XLPE power cable accessory in a sleeved mode.
The UHF sensor is a sheet-shaped UHF sensor and is formed on the outer surface of an annular band-shaped insulating layer of the XLPE power cable accessory through seamless welding.
The feeder line is a coaxial cable.
Compared with the prior art, the technical scheme of the utility model have following advantage:
(1) a XLPE power cable partial discharge sensor feeder system, feeder one end with the UHF sensor is connected, another termination of feeder waterproof N head, waterproof N head is used for connecting partial discharge check out test set, in the actual operation process, waterproof N head can make things convenient for partial discharge check out test set's installation and dismantlement. Moreover, the feed line copper mesh is grounded, so that noise signals can be effectively shielded, and the anti-interference performance of a feed line system is enhanced.
(2) A XLPE power cable partial discharge sensor feeder system, shielding cap detachably installs waterproof N is overhead, can guarantee waterproof N first leakproofness, prevents that the filth of external dust, mosquito from polluting waterproof N first to it is convenient to dismantle. The grounding copper net is connected with the two outer semi-conductive layers, and the feeder copper net is grounded in a mode of being connected with the grounding copper net, so that the anti-interference performance of the XLPE power cable accessory and the feeder system can be effectively enhanced. The feeder line system is protected by the sealing copper shell, a leading-out hole for leading out the feeder line is formed in the sealing copper shell, on one hand, the leading-out hole can facilitate leading out of the feeder line, on the other hand, sealant can be injected into the sealing copper shell through the leading-out hole to form a sealing adhesive layer, and the sealing waterproof performance of the XLPE power cable partial discharge sensor feeder line system is effectively enhanced. And the waterproof N head is fixedly arranged at the position of the lead-out hole, so that the airtight and waterproof performance of the feeder line system can be further improved. The UHF sensor, the feeder line, the waterproof N head, the shielding cap and the grounding copper net form a signal path, a signal detected by the UHF sensor is grounded, and the suspension discharge phenomenon generated by the UHF sensor can be effectively prevented.
Drawings
In order that the present invention may be more readily and clearly understood, reference will now be made in detail to the present invention, which is illustrated in the accompanying drawings,
fig. 1 is a schematic structural diagram of a XLPE power cable partial discharge sensor feeder system according to the present invention;
fig. 2 is a schematic structural view of a XLPE power cable partial discharge sensor feeder system with a sealed copper shell according to the present invention;
the reference numbers in the figures denote: the cable comprises a 1-XLPE power cable core connector, a 2-inner semi-conducting layer, a 3-insulating layer, a 4-UHF sensor, a 5-feeder, a 6-sealing copper shell and a 7-leading-out hole.
Detailed Description
As an embodiment of the present invention, as shown in fig. 1, an XLPE power cable partial discharge sensor feeder system includes a UHF sensor 4, a feeder 5, and a waterproof N head. Wherein,
the UHF sensor 4 is annularly formed on the outer surface of an annular band-shaped insulating layer 3 of the XLPE power cable accessory; wherein, XLPE power cable accessories includes interior semi-conducting layer 2, insulating layer 3 and two outer semi-conducting layers by interior outside to in proper order, form the portion of holding that holds XLPE power cable core joint 1 in the interior semi-conducting layer 2, 3 cyclic annular parcels of insulating layer are in 2 outsides of interior semi-conducting layer, two the cyclic annular parcel of outer semi-conducting layer is in 3 outsides of insulating layer and be located respectively the tip of insulating layer 3, two be naked annular band-shaped insulating layer 3 between the outer semi-conducting layer.
And the feeder line 5 further comprises a wire core, a feeder line insulating layer and a feeder line copper mesh, wherein the feeder line insulating layer is positioned outside the wire core. Wherein,
the cable core at one end of the feeder line 5 is connected with the UHF sensor 4, the connection mode can adopt a laser welding or high-power soldering mode, the cable core is welded at any position on the UHF sensor 4, and the other end of the feeder line 5 is led out. As a specific embodiment, the feeder 5 is a coaxial cable. In other embodiments, the feed line 5 may also be a wire.
The feeder copper mesh is grounded, so that noise signals can be effectively shielded, and the anti-interference performance of a feeder system is enhanced.
And the waterproof N head is connected with the feeder line 5. In the actual operation process, the waterproof N head is an interface between the feeder 5 and the partial discharge detection device, so that the partial discharge detection device can be conveniently detached.
As an embodiment of the present invention, the UHF sensor 4 is a sheet-shaped UHF sensor 4, which is wrapped around the exposed annular insulating layer 3 of the XLPE power cable accessory in an annular manner, and the head and tail ends of the UHF sensor 4 are welded in a seamless manner, so that the UHF sensor is formed in an annular manner on the outer surface of the annular insulating layer 3 of the XLPE power cable accessory. Because the UHF sensor 4 is flaky, the UHF sensor can be cut and installed on site according to the thickness of an XLPE power cable accessory before welding, the installation process can be greatly simplified, the working efficiency is improved, the manufacturing and using cost is reduced, and the universality is greatly enhanced.
As another embodiment of the present invention, the UHF sensor 4 may also be an annular UHF sensor 4 which is annularly formed on the outer surface of the annular insulating layer 3 of the XLPE power cable accessory in a sleeved manner.
As the utility model discloses other embodiments, on the basis of above-mentioned embodiment, XLPE power cable partial discharge sensor feeder system still includes the shielding cap, shielding cap detachably installs waterproof N is overhead, can guarantee waterproof N first leakproofness, prevents that the filth of external dust, mosquito from polluting waterproof N first to it is convenient to dismantle.
As the utility model discloses an other embodiments, on the basis of above-mentioned embodiment, XLPE power cable partial discharge sensor feeder system still includes the ground connection copper mesh, the ground connection copper mesh and two the outer semi-conductive layer is connected, the feeder copper mesh through with the mode ground connection that the ground connection copper mesh is connected can effectively strengthen XLPE power cable annex and feeder system's interference killing feature. The connecting mode can adopt a laser welding or high-power soldering mode to connect the feeder copper mesh with the grounding copper mesh. After the feeder copper mesh is connected with the grounding copper mesh, the UHF sensor 4, the feeder 5, the waterproof N head, the shielding cap and the grounding copper mesh form a signal path, a signal detected by the UHF sensor 4 is grounded, and the suspension discharge phenomenon generated by the UHF sensor 4 can be effectively prevented.
As another embodiment of the present invention, as shown in fig. 2, on the basis of the above embodiment, the XLPE power cable partial discharge sensor feeder system further includes a sealing copper shell 6 disposed outside the grounding copper mesh, and the sealing copper shell 6 is provided with a lead-out hole 7 for leading out the feeder 5.
As another embodiment of the present invention, on the basis of the above-mentioned embodiment of providing the copper sealing case 6, the sealing glue is poured into the copper sealing case 6, and the sealing glue is poured into the copper sealing case 6 through the outlet hole 7 to form a sealing glue layer, so as to effectively enhance the sealing waterproof performance of the XLPE power cable partial discharge sensor feeder system. The sealant is polyurethane sealant.
As the utility model discloses another embodiment, on the basis of hole 7 embodiment is drawn forth in the above-mentioned setting, waterproof N head is installed draw forth hole 7 department, can strengthen the leakproofness of sealed copper shell 6.
In one embodiment, the feeder 5 is a coaxial cable.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (8)
1. A XLPE power cable partial discharge sensor feeder system is characterized by comprising a UHF sensor, a feeder and a waterproof N head; wherein,
the UHF sensor is annularly formed on the outer surface of an annular band-shaped insulating layer of the XLPE power cable accessory; the XLPE power cable accessory sequentially comprises an inner semi-conducting layer, an insulating layer and two outer semi-conducting layers from inside to outside, wherein a containing part for containing a core joint of an XLPE power cable is formed in the inner semi-conducting layer, the insulating layer is annularly wrapped on the outer side of the inner semi-conducting layer, the two outer semi-conducting layers are annularly wrapped on the outer side of the insulating layer and are respectively positioned at the end parts of the insulating layer, and a naked annular band-shaped insulating layer is arranged between the two outer semi-conducting layers;
the feeder line further comprises a wire core, a feeder line insulating layer and a feeder line copper mesh, wherein the feeder line insulating layer is positioned outside the wire core; wherein,
the cable core at one end of the feeder line is connected with the UHF sensor, and the other end of the feeder line is led out;
the feeder line copper mesh is grounded;
and the waterproof N head is connected with the leading-out end of the feeder line.
2. An XLPE power cable partial discharge sensor feeder system as in claim 1 further comprising a shield cap removably mounted over said watertight N-head.
3. An XLPE power cable partial discharge sensor feeder system according to claim 1 or 2, further comprising a grounding copper mesh connected to both of said outer semi-conducting layers; meanwhile, the grounding copper mesh is connected with the feeder copper mesh.
4. An XLPE power cable partial discharge sensor feeder system according to claim 3 further comprising a sealed copper shell disposed outside the grounded copper mesh, the sealed copper shell having exit holes for exiting the feeder.
5. The XLPE power cable partial discharge sensor feeder system of claim 4, further comprising a sealant layer injected and molded into the sealed copper shell through the exit hole.
6. An XLPE power cable partial discharge sensor feeder system according to claim 5, wherein the waterproof N-head is fixedly mounted at the exit hole.
7. An XLPE power cable partial discharge sensor feed system as claimed in claim 1 or 2 wherein the UHF sensor is an annular UHF sensor annularly formed by telescoping over the outer surface of an annular band insulation of the XLPE power cable accessory.
8. An XLPE power cable partial discharge sensor feeder system according to claim 1 or 2, characterized in that the feeder is a coaxial cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320299236 CN203275580U (en) | 2013-05-28 | 2013-05-28 | XLPE power cable partial discharge sensor feeder system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320299236 CN203275580U (en) | 2013-05-28 | 2013-05-28 | XLPE power cable partial discharge sensor feeder system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203275580U true CN203275580U (en) | 2013-11-06 |
Family
ID=49505957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320299236 Expired - Fee Related CN203275580U (en) | 2013-05-28 | 2013-05-28 | XLPE power cable partial discharge sensor feeder system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203275580U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107271870A (en) * | 2017-07-13 | 2017-10-20 | 国网福建省电力有限公司 | 110kV flexible power cable plug terminals and its installation method |
| CN114500814A (en) * | 2022-02-11 | 2022-05-13 | 浙江大华技术股份有限公司 | Video camera |
-
2013
- 2013-05-28 CN CN 201320299236 patent/CN203275580U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107271870A (en) * | 2017-07-13 | 2017-10-20 | 国网福建省电力有限公司 | 110kV flexible power cable plug terminals and its installation method |
| CN114500814A (en) * | 2022-02-11 | 2022-05-13 | 浙江大华技术股份有限公司 | Video camera |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202978201U (en) | Intelligent high-voltage cable joint of built-in partial discharge sensor | |
| CN203275580U (en) | XLPE power cable partial discharge sensor feeder system | |
| CN109116200B (en) | High-voltage cable insulation joint with built-in very high frequency partial discharge sensing device | |
| CN203287479U (en) | Partial discharge sensing system for cross linked polyethylene (XLPE) power cable | |
| CN103344886B (en) | Sensor for partial discharge detection of XLPE power cable | |
| CN204809824U (en) | Shrinkage cable terminal | |
| CN203275576U (en) | Sensor used for XLPE power cable partial discharge detection | |
| CN202602234U (en) | Medium-pressure cross-linked polyethylene cable terminal with insulation stress cone | |
| CN203275577U (en) | Novel on-line monitoring system for power cable partial discharge | |
| CN207851172U (en) | A kind of cable flexible joint test tool | |
| CN203275578U (en) | Power cable partial discharge on-line monitoring system which is convenient to connect | |
| CN203026716U (en) | Tube bus shielded insulating GIS (geographic information system) terminal connector | |
| CN207424083U (en) | It is a kind of to be set effective the hidden danger traveling wave detector device for inhibiting interference outside based on sensor | |
| CN108919076B (en) | Bipolar implantable cable joint partial discharge sensor | |
| CN207038809U (en) | A kind of European rear joint | |
| CN202583264U (en) | Electromagnetic shielding shell for on-line monitoring device of transmission line | |
| CN218383127U (en) | Sensor for detecting partial discharge of power cable | |
| CN105699755A (en) | Novel voltage wireless acquisition system | |
| CN205488611U (en) | Novel electric power grounding network system | |
| CN204391301U (en) | A kind of cable on line device | |
| CN108107295A (en) | A kind of cable flexible joint test tool and method | |
| CN203787867U (en) | Single-core high-voltage cable drawing head | |
| CN204835557U (en) | Electric installation is got to heavy current | |
| CN202649280U (en) | Special high- and low-voltage signal isolation transmission device for contact network inspection trolley | |
| CN218549318U (en) | Lead shielding pipe with alarm device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20200528 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |