CN103630806B - 10kV cable intermediate joint stress cone dislocation partial discharge model manufacture method - Google Patents
10kV cable intermediate joint stress cone dislocation partial discharge model manufacture method Download PDFInfo
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- CN103630806B CN103630806B CN201310548120.0A CN201310548120A CN103630806B CN 103630806 B CN103630806 B CN 103630806B CN 201310548120 A CN201310548120 A CN 201310548120A CN 103630806 B CN103630806 B CN 103630806B
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- intermediate joint
- partial discharge
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000004703 cross-linked polyethylene Substances 0.000 claims abstract description 7
- 238000009413 insulation Methods 0.000 claims description 27
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 239000004065 semiconductor Substances 0.000 claims description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 239000002390 adhesive tape Substances 0.000 claims description 7
- 238000002788 crimping Methods 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 8
- 238000009434 installation Methods 0.000 abstract description 5
- 229920003020 cross-linked polyethylene Polymers 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract description 2
- 230000006378 damage Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient 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
- 230000005684 electric field Effects 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- Processing Of Terminals (AREA)
- Cable Accessories (AREA)
Abstract
It is an object of the invention to provide a kind of 10kV cable intermediate joint stress cone dislocation partial discharge model manufacture method, common XLPE cable is fabricated directly into, can truly reflect the model that cable intermediate joint comes out during manufacturing installation and operation in the case of guaranteeing safety.In order to solve above-mentioned technical problem, the present invention be include strip cable, wrap up, clean, the step such as connection.Compared with prior art, the design principle of 10kV cable intermediate joint stress cone of the present invention dislocation partial discharge model is to be chosen at inside real cable intermediate joint artificially to make a rejected region, can truly reflect the character of representative defect, feature and discharge mechanism that cable intermediate joint comes out during manufacturing installation and operation, realize typical defect office and put effective extraction of characteristic quantity, the local discharge characteristic amount that well dislocation of research stress cone is formed, provides basis in kind to carrying out cable intermediate head partial discharge detection.
Description
Technical field
The present invention relates to field of power, particularly relate to 10kV cable intermediate joint stress cone dislocation local and put
Electric model manufacture method.
Background technology
XLPE cable is widely used in transmission line of electricity with the performance of its excellence, but cable makes length and typically exists
Below 1km, needs cable intermediate joint to connect, and therefore cable intermediate joint is the important composition of power cable
Part, but be also the multiple position of transmission line of electricity accident, its reliability directly affects the peace of electric power system. simultaneously
Quan Xing.At the scene in installation process, owing to misoperation may introduce number of drawbacks in cable accessory,
Adnexa is caused serious damage.It is closely related that the partial discharge quantity of cable is insulated from situation, shelf depreciation
The change of amount imply that cable insulation there may be the defect of harm cable running safety.
To this, existing in order to for such problem, best settling mode is that a kind of physical model of design comes
Specialize in.Also can be easy to staff practises issue handling mode simultaneously.
At present, both at home and abroad cable intermediate joint insulation defect flash-over characteristic is carried out numerous studies, but most of
Typical defect flash-over characteristic research is not to carry out on actual cable joint, and true flash-over characteristic has with in joint
Difference.And if really choose one section of cable the most defective, then cannot ensure the safety of this model.
The most how on the premise of safety, to simulate 10kV cable intermediate joint stress cone dislocation local the most truly
Discharging model just becomes a difficult problem.
Summary of the invention
It is an object of the invention to provide a kind of 10kV cable intermediate joint stress cone dislocation partial discharge model
Manufacture method, is fabricated directly into common XLPE cable, truly can reflect in the case of guaranteeing safety
Go out the model that cable intermediate joint comes out during manufacturing installation and operation.
In order to solve above-mentioned technical problem, the present invention is achieved by the following technical solutions:
10kV cable intermediate joint stress cone dislocation partial discharge model manufacture method, first chooses two sections of cables,
Comprise the following steps successively:
Step 1: strip cable: scrub cable two ends length is at least the cable cover(ing) of 1 meter respectively,
Cable two ends divest cable jacket, the steel sheath of stripping cable, uniformly strike off the insulation shielding in steel sheath
Layer, divests the parcel outer semiconductor layer of core, major insulation body layer and interior quasiconductor the most successively
Layer, finally exposes core, and polishing insulating surface is until smooth；
Step 2: wrapping: half stacked holds semiconductive adhesive tape back and forth, starts bag at 40mm on copper shield band
To the main insulating layer of 10mm；
Step 3: clean: clean cable main insulating layer with abluent, fall to remain in master with sand papering simultaneously
Outer semiconductor layer in insulation；
Step 4: connect: compare the end cable from stripping length is longer and load stress cone, load onto copper connecting tube
And crimp, the force order of crimping is from centre to surrounding；After crimping, connecting tube outer surface filing polishing is slided,
With insulation cleaning paper scrub；Watt gram silicone grease is used to start to be coated with from outer semiconductor layer and main insulating layer intersection
Smear, be evenly coated on major insulation surface；Another section of cable is positioned by the edge of alignment semiconductive adhesive tape, location
Time make the fracture of outer semiconducting layer of another section of cable stretch out stress cone 25-35mm to form dislocation, take out counterclockwise
Falling the core rope within stress cone makes stress cone shrink fastening, completes.
Preferably, described cable body selects rated voltage 10kV, cross-sectional area of conductor 240mm2XLPE electricity
Cable.So XLPE cable structure of specification understands that each structure is clearly demarcated, most suitable as model construction unit.
Preferably, in described step 1, the concrete operation method of stripping Steel armor of cable is: sawing steel sheath, saw
The trace degree of depth is 2/3 steel armour thickness, inserts kerf with screwdriver thus is provoked by core, vises kerf with pliers and lacks
Mouthful, scrolling tears steel armour；Steel armour fracture is tied with pliers.Owing to steel armour is thicker, it is therefore desirable to enter with saw
Row sawing, but if carrying out sawing iff use saw, it is easy to cause core rope to sawed-off.And
Such mode can avoid steel armour internal layer to be destroyed, it is ensured that the integrity of every layer.
Preferably, the outer semiconductor layer, major insulation body layer and the inner semiconductor layer that divest in described step 1 are long
Degree equal difference reduces, and the length that final outer semiconductor layer, major insulation body layer and inner semiconductor layer expose is equal.
Such equidistant exposing, the beneficially later stage tightens.Due to wherein outer semiconductor layer, major insulation body layer and
The every layer thickness of inner semiconductor layer is not the most the thickest, and the most such structure can ensure that when stretching tight semiconductive adhesive tape not
Can expose too short around staggered floor due to certain layer.
Preferably, described insulation screen is copper shield band.
Compared with prior art, 10kV cable intermediate joint stress cone of the present invention dislocation the setting of partial discharge model
Meter principle is to be chosen at inside real cable intermediate joint artificially to make a rejected region, can truly reflect
Go out the character of representative defect, spy that cable intermediate joint comes out during manufacturing installation and operation
Seek peace discharge mechanism, it is achieved effective extraction of characteristic quantity, the well dislocation of research stress cone are put in typical defect office
The local discharge characteristic amount formed, provides basis in kind to carrying out cable intermediate head partial discharge detection.
Detailed description of the invention
10kV cable intermediate joint stress cone dislocation partial discharge model manufacture method, first chooses two sections of cables,
Comprise the following steps successively:
Step 1: strip cable: scrub cable two ends length is at least the cable cover(ing) of 1 meter respectively,
Cable two ends divest cable jacket, the steel sheath of stripping cable, uniformly strike off the insulation shielding in steel sheath
Layer, divests the parcel outer semiconductor layer of core, major insulation body layer and interior quasiconductor the most successively
Layer, finally exposes core, and polishing insulating surface is until smooth；
Step 2: wrapping: half stacked holds semiconductive adhesive tape back and forth, starts bag at 40mm on copper shield band
To the main insulating layer of 10mm；
Step 3: clean: clean cable main insulating layer with abluent, fall to remain in master with sand papering simultaneously
Outer semiconductor layer in insulation；
Step 4: connect: compare the end cable from stripping length is longer and load stress cone, load onto copper connecting tube
And crimp, the force order of crimping is from centre to surrounding；After crimping, connecting tube outer surface filing polishing is slided,
With insulation cleaning paper scrub；Watt gram silicone grease is used to start to be coated with from outer semiconductor layer and main insulating layer intersection
Smear, be evenly coated on major insulation surface；Another section of cable is positioned by the edge of alignment semiconductive adhesive tape, location
Time make the fracture of outer semiconducting layer of another section of cable stretch out stress cone 25-35mm to form dislocation, take out counterclockwise
Falling the core rope within stress cone makes stress cone shrink fastening, completes.
Described cable body selects rated voltage 10kV, cross-sectional area of conductor 240mm2XLPE cable.
In described step 1, the concrete operation method of stripping Steel armor of cable is: sawing steel sheath, and cutting mark depth is
2/3 steel armour thickness, inserts kerf with screwdriver thus is provoked by core, vise kerf breach, scrolling with pliers
Tear steel armour；Steel armour fracture is tied with pliers.The outer semiconductor layer that divests in described step 1, major insulation body
Layer and inner semiconductor layer length equal difference reduce, final outer semiconductor layer, major insulation body layer and interior quasiconductor
The length that layer exposes is equal.Described insulation screen is copper shield band.
In the normal manufacturing process of 10kV cable intermediate joint stress cone, stress cone end should be with cable outer half
Conductive layer fracture closely crimps, and for ensureing installation quality, stress cone all leaves certain surplus relative to position.
If but do not note, make one end outer semiconducting layer fracture stretch out stress cone afterbody, electric field will be produced and concentrate,
Produce creepage phenomenon in interface, thus cause shelf depreciation.Cable intermediate joint stress cone dislocation defects produces
Raw partial discharge quantity is very big, the most serious to the damage of cable connector built-in electrical insulation performance.And institute of the present invention
The 10kV cable intermediate joint stress cone dislocation partial discharge model made, logical upper 10kV alternating current, one
After round the clock, stop energising, cut stress cone position open, just can see at the one of obvious radius 1-5 centimetre or many
The burnt trace in place.By the analysis to short-circuit conditions, it can be realized that the different angle of stress cone dislocation under different occasions
The different consequences brought under degree.Also can simulate the deterioration extent under rainy day or other adverse circumstances simultaneously.
Research process only needs an alternating current power supply and remote control switch and a spacious experimental site just energy real
Existing.Compared with other schemes of the prior art, save and safe and reliable.
When the present invention makes, fracture at outer semiconducting layer stretch out stress cone 25-35mm to form dislocation is in order to really
Protect the shelf depreciation situation after simulation conduction sufficiently large, it is simple to observe, but the safety of also ensuring that.If this
Apart from too small, under the alternating current effect of 10KV, just may can detect that there is burnt trace inside week more than 2.
This spacing is excessive, electric spark may directly occurs, by this section of cable bad, causes danger simultaneously.
The foregoing is only the specific embodiment of the present invention, but the technical characteristic of the present invention is not limited thereto, appoint
What those skilled in the art is in the field of the invention, and change or the modification made all are contained the present invention's
Among the scope of the claims.
Claims (5)
1.10kV cable intermediate joint stress cone dislocation partial discharge model manufacture method, first chooses two sections of cables,
It is characterized in that: comprise the following steps successively:
Step 1: strip cable: scrub cable two ends length is at least the cable cover(ing) of 1 meter respectively,
Cable jacket is divested at cable two ends, the steel sheath of stripping cable, uniformly strike off the insulation screen in steel sheath
Cover layer, divest the parcel outer semiconductor layer of core, major insulation body layer the most successively and interior partly lead
Body layer, finally exposes core, and polishing insulating surface is until smooth；
Step 2: wrapping: half stacked holds semiconductive adhesive tape back and forth, opens at 40mm from copper shield band
Begin to wrap to the main insulating layer of 10mm；
Step 3: clean: clean cable main insulating layer with abluent, fall to remain in sand papering simultaneously
Outer semiconductor layer in major insulation；
Step 4: connect: compare the end cable from stripping length is longer and load stress cone, load onto copper and connect
Managing and crimp, the force order of crimping is from centre to surrounding；To connecting tube outer surface filing polishing after crimping
Sliding, with insulation cleaning paper scrub；A watt gram silicone grease is used to open with main insulating layer intersection from outer semiconductor layer
Beginning smears, and is evenly coated on major insulation surface；Another section of cable is positioned by the edge of alignment semiconductive adhesive tape,
The fracture making the outer semiconducting layer of another section of cable during location stretches out stress cone 25-35mm and forms dislocation, inverse time
The core rope within stress cone taken out by pin makes stress cone shrink fastening, completes.
2. 10kV cable intermediate joint stress cone dislocation partial discharge model manufacture method as claimed in claim 1,
It is characterized in that, described cable body selects rated voltage 10kV, cross-sectional area of conductor 240mm2XLPE
Cable.
3. 10kV cable intermediate joint stress cone dislocation partial discharge model manufacture method as claimed in claim 1,
It is characterized in that, in described step 1, the concrete operation method of stripping Steel armor of cable is: sawing steel sheath,
Cutting mark depth is 2/3 steel armour thickness, inserts kerf with screwdriver thus is provoked by core, vises with pliers
Kerf breach, scrolling tears steel armour；Steel armour fracture is tied with pliers.
4. 10kV cable intermediate joint stress cone dislocation partial discharge model manufacture method as claimed in claim 1,
It is characterized in that, outer semiconductor layer, major insulation body layer and the inner semiconductor layer divested in described step 1
Length equal difference reduces, the length phase that final outer semiconductor layer, major insulation body layer and inner semiconductor layer expose
Deng.
5. 10kV cable intermediate joint stress cone dislocation partial discharge model manufacture method as claimed in claim 1,
It is characterized in that, described insulation screen is copper shield band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310548120.0A CN103630806B (en) | 2013-11-06 | 2013-11-06 | 10kV cable intermediate joint stress cone dislocation partial discharge model manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310548120.0A CN103630806B (en) | 2013-11-06 | 2013-11-06 | 10kV cable intermediate joint stress cone dislocation partial discharge model manufacture method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103630806A CN103630806A (en) | 2014-03-12 |
| CN103630806B true CN103630806B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310548120.0A Active CN103630806B (en) | 2013-11-06 | 2013-11-06 | 10kV cable intermediate joint stress cone dislocation partial discharge model manufacture method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107957540A (en) * | 2017-12-29 | 2018-04-24 | 广州供电局有限公司 | The production method of electric cable stoppage transition joint and the detection device of cable local discharge |
| CN108957263B (en) * | 2018-08-24 | 2020-06-09 | 国网浙江省电力有限公司电力科学研究院 | XLPE cable accessory interface multi-stress coupling simulation test device and method |
| CN114284982B (en) * | 2021-12-24 | 2023-06-27 | 广东电网有限责任公司江门供电局 | Device for mounting dislocation defect of stress cone in 10kV distribution cable intermediate joint |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10191543A (en) * | 1996-12-25 | 1998-07-21 | Fujikura Ltd | Connection portion for power cable |
| CN2919634Y (en) * | 2006-06-30 | 2007-07-04 | 深圳市长园电力技术有限公司 | Total cool-shrinking type high voltage cross-bonding cable terminal |
| CN101068075A (en) * | 2007-05-22 | 2007-11-07 | 宁波东方电缆有限公司 | Soft joint for cross-linked polyethylene cable and producing method thereof |
-
2013
- 2013-11-06 CN CN201310548120.0A patent/CN103630806B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10191543A (en) * | 1996-12-25 | 1998-07-21 | Fujikura Ltd | Connection portion for power cable |
| CN2919634Y (en) * | 2006-06-30 | 2007-07-04 | 深圳市长园电力技术有限公司 | Total cool-shrinking type high voltage cross-bonding cable terminal |
| CN101068075A (en) * | 2007-05-22 | 2007-11-07 | 宁波东方电缆有限公司 | Soft joint for cross-linked polyethylene cable and producing method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 10kV配电网T形、肘形电缆头制作工艺改进措施探讨;赵冠清等;《内蒙古电力技术》;20121231;第30卷(第6期);正文第98页及表1 * |
| 电缆中间接头应力锥安装错位检测的试验研究;彭发东等;《广东电力》;20130331;第26卷(第3期);第41页右栏倒数第一行至第42页左栏第一行，第43页左栏第4－13行及图1 * |
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| CN103630806A (en) | 2014-03-12 |
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Address after: 100045 West Chang'an Avenue, Beijing, No. 86, No. Co-patentee after: Jinhua Power Supply Company, State Grid Zhejiang Electric Power Company Patentee after: State Grid Corporation of China Co-patentee after: Red phase Limited by Share Ltd Address before: 100045 West Chang'an Avenue, Beijing, No. 86, No. Co-patentee before: Jinhua Power Supply Company, State Grid Zhejiang Electric Power Company Patentee before: State Grid Corporation of China Co-patentee before: Xiamen Red Phase Instruments Inc. |