CN102610319B - 750-1100kV ultra-high-voltage crosslinked polyethylene insulating power cable - Google Patents
750-1100kV ultra-high-voltage crosslinked polyethylene insulating power cable Download PDFInfo
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- CN102610319B CN102610319B CN201210085906.9A CN201210085906A CN102610319B CN 102610319 B CN102610319 B CN 102610319B CN 201210085906 A CN201210085906 A CN 201210085906A CN 102610319 B CN102610319 B CN 102610319B
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Abstract
The invention relates to a 750-1100kV ultra-high-voltage crosslinked polyethylene insulating power cable, which comprises a conductor, a semiconductive strapping tape, a conductor shielding layer, an insulating layer, an insulating-shielding layer, a semiconductive water-resisting cushion layer, a metal shielding layer, an insulating outer protection layer and a conductive outer protection layer in sequence from the inner layer to the outer layer. The insulating layer is made from an ultra-purified crosslinked polyethylene insulating material or an ultra-purified polyethylene insulating material; the metal shielding layer is made from a copper sleeve; and the insulating outer protection layer and the conductive outer protection layer are respectively made from a polyolefin insulating material and a conductive polyolefin material which can be mixed. The power cable provided by the invention is excellent in mechanical and anticorrosive properties, convenient to install and maintain and good in environmental protection property; and the metal shielding layer has enough transient short circuit current capacity, therefore the power cable is applicable to 750-1100kV ultra-high-voltage and high-capacity alternating current transmission lines.
Description
Technical field
The present invention relates to a kind of cable, particularly one has better mechanical performance and Corrosion Protection, convenient for installation and maintenance, good environmental protection, there is enough transient state short-circuit current capacity non-ferrous metal liner shields, be applied to the power cable with cross-linked polyethylene insulation of large-scale power station 750 ~ 1100kV ultra high voltage, Large Copacity transmission line of alternation current.
Background technology
Along with the high speed development of national economy, the needs that green energy resource is built, ultra high voltage, Large Copacity, telecommunicate project of transmitting and converting electricity refer to national prospective planning.Domestic 750-1000kV AC input transformation engineering has started to start building in bulk to build, and drops into commercial operation.
External existing ultra high voltage polypropylene film extrusion coating paper insulate, and oil-filled power cable structure performance is more unstable, installation and maintenance are inconvenient, environmental-protecting performance is poor; And international, the domestic power cable with cross-linked polyethylene insulation product not also being applicable to extra-high voltage grid transmission line.
Summary of the invention
The object of this invention is to provide a kind of 750-1000kV ultra high voltage power cable with cross-linked polyethylene insulation, this cable machinery intensity is high, corrosion-resistant, loss is little, convenient for installation and maintenance, good environmental protection, is specially adapted to large-scale power station 750 ~ 1100kV ultra high voltage, Large Copacity transmission line of alternation current.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of ultra high voltage power cable with cross-linked polyethylene insulation, and cable comprises conductor, semiconductive strapping, conductor shield, insulating barrier, insulation screen, semiconductive water-blocking buffer layer, metal screen layer, insulation outer jacket, conductive outer sheath from internal layer successively respectively to skin; Described insulation outer jacket adopts polyethylene insulation protective cover material or polyvinyl chloride insulation protective cover material to make; Described conductive outer sheath adopts conductive polyolefin material or semiconductive polyolefin material to make.
In order to weaken the kelvin effect of conductor when carrying high current load, described conductor preferentially adopts copper milliken conductor, also can adopt that aluminium milliken conductor, multiple conducting wires are stranded presses round copper conductor or multiple conducting wires is stranded presses round aluminium conductor.
Described conductor shield, insulation screen adopt ultra-smooth semiconductive polyolefin shielding material to make.
Described insulating barrier preferentially adopts ultrapurification ultra high voltage cross-linked polyethylene insulating material, and ultrapurification insulating material of polyethylene also can be adopted to make.
Described metal screen layer adopts wrinkle copper sleeve circle, copper sleeve, corrugated aluminium sheath pipe or circle aluminum casing to make.
750 ~ 1100kV ultra high voltage power cable with cross-linked polyethylene insulation provided by the invention, there is good mechanical performance and Corrosion Protection, loss is little, convenient for installation and maintenance, good environmental protection, metallic shield cover has enough transient state short-circuit current capacity, is applicable to national grid large-scale power station ultra high voltage, Large Copacity transmission line of alternation current.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is structural representation of the present invention.
Embodiment
As shown in Figure 1, the present invention comprises conductor 1, semiconductive strapping 2, conductor shield 3, insulating barrier 4, insulation screen 5, semiconductive water-blocking buffer layer 6, metal screen layer 7, insulation outer jacket 8, conductive outer sheath 9 successively respectively from internal layer to skin.
In order to meet the needs of ultra high voltage, Large Copacity ac transmission, weaken the kelvin effect of conductor when carrying high current load, described conductor 1 preferentially adopts copper milliken conductor, to be added with five milliken conductors of center circle wire, seven milliken conductors or nine milliken conductors for conventional pattern.Also can adopt aluminium milliken conductor, or adopt that multiple conducting wires is stranded presses round copper conductor or aluminium conductor.
In order to strengthen the steadiness of conductor structure, conductor 1 is outside equipped with wrapped semiconductive strapping 2, and semiconductive strapping 2 and conductor shield 3 combine the conductor screen forming cable.
Described conductor shield 3, insulation screen 5 adopt ultra-smooth semiconductive polyolefin to shield material manufacture.
Described insulating barrier 4 adopts ultrapurification ultra high voltage cross-linked polyethylene insulating material or ultrapurification insulating material of polyethylene to make.
Conductor shield 3, insulating barrier 4, insulation screen 5 adopt three-layer co-extruded cross-linking cable production line once to extrude manufacture and complete.
Because 750 ~ 1100kV ultra high voltage power cable with cross-linked polyethylene insulation has higher requirement to the loss of metal screen layer and capacity of short circuit, described metal screen layer 7 preferentially adopts the less soft copper material of resistivity to make, according to design needs, select the soft copper band of one fixed width and number millimeters thick, the circumference of the copper pipe sheath made as required, copper strip is cut into one fixed width, then be wrapped in the semiconductive water-blocking buffer layer 6 of cable through metal tube shaping mould, form the copper sleeve having certain interval with semiconductive water-blocking buffer layer 6; Adopt metal tube argon arc welding machine again, bag piece is indulged to the copper sleeve of first one-step forming and implements longitudinal automatic welding.Metal tube, when vertical bag welding, can produce certain heat, the semiconductive water-blocking buffer layer at this moment outside cable insulation core, play the effect stopping welding high temperature, and protection cable insulation core is not burned.
Complete between the copper sleeve of vertical bag piece welding and semiconductive water-blocking buffer layer and also possess certain gap; Re-use rotation to press forming machine and rotate copper sleeve and press shaping, make wrinkle copper sleeve; Or adopt drawing to shrink impacted process, make round copper sleeve.Its internal circular surfaces of shaping copper sleeve, should moderately stick in semiconductive water-blocking buffer layer 6.Such insulation shield layer 5 → constitute complete cable outer layer metallic shield electricity continuous path through semiconductive water-blocking buffer layer 6 → metal screen layer 7.
Described metal screen layer 7 also can be made into corrugated aluminium sheath pipe or circle aluminum casing.
Described insulation outer jacket 8 preferentially adopts polyethylene insulation protective cover material to make, for preventing the polyethylene insulation outer jacket of cable from ftractureing, and normal employing modification medium density polyethylene insulating sleeve, or adopt polyvinyl chloride insulation sheath.After the cable asphalt that spraying melting is answered on metallic sheath surface or PUR, then extrude plastics outer jacket.
In order to the firmness of the conductive layer on reinforced insulation outer jacket 8, make the withstand voltage test convenient and reliable operation of insulation outer jacket 8, the insulation outer jacket 8 of cable extrudes one deck conductive outer sheath 9 again, conductive outer sheath 9 adopts the conductive polyolefin material merged with insulation outer jacket 8 phase to make, and semiconductive polyolefin material also can be used to make.
For making the interface between insulation outer jacket 8 of the present invention and conductive outer sheath 9 fuse well, insulation outer jacket 8 adopts two layers of plastic co-extrusion manufacture technics with conductive outer sheath 9.
Claims (2)
1. 750 ~ 1100kV ultra high voltage power cable with cross-linked polyethylene insulation, is characterized in that: cable comprises conductor (1), semiconductive strapping (2), conductor shield (3), insulating barrier (4), insulation screen (5), semiconductive water-blocking buffer layer (6), metal screen layer (7), insulation outer jacket (8), conductive outer sheath (9) successively respectively from internal layer to skin; Described insulation outer jacket (8) adopts polyethylene insulation protective cover material or polyvinyl chloride insulation protective cover material to make; Described conductive outer sheath (9) adopts conductive polyolefin material or semiconductive polyolefin material to make; Insulation outer jacket (8) and conductive outer sheath (9) adopt two layers of plastic co-extrusion manufacture technics; Described conductor (1) adopts that copper milliken conductor, aluminium milliken conductor, multiple conducting wires are stranded presses round copper conductor or multiple conducting wires is stranded presses round aluminium conductor; Described conductor shield (3), insulation screen (5) adopt ultra-smooth semiconductive polyolefin shielding material to make; Described insulating barrier (4) adopts ultrapurification ultra high voltage cross-linked polyethylene insulating material or ultrapurification insulating material of polyethylene to make.
2. 750 ~ 1100kV ultra high voltage power cable with cross-linked polyethylene insulation according to claim 1, is characterized in that: described metal screen layer (7) adopts wrinkle copper sleeve, circle copper sleeve or circle aluminum casing to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210085906.9A CN102610319B (en) | 2012-03-28 | 2012-03-28 | 750-1100kV ultra-high-voltage crosslinked polyethylene insulating power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210085906.9A CN102610319B (en) | 2012-03-28 | 2012-03-28 | 750-1100kV ultra-high-voltage crosslinked polyethylene insulating power cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102610319A CN102610319A (en) | 2012-07-25 |
| CN102610319B true CN102610319B (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210085906.9A Active CN102610319B (en) | 2012-03-28 | 2012-03-28 | 750-1100kV ultra-high-voltage crosslinked polyethylene insulating power cable |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575837A (en) * | 2014-12-12 | 2015-04-29 | 浙江晨光电缆股份有限公司 | High-voltage power cable extruded with flat aluminum sheath and manufacturing method |
| CN104575824A (en) * | 2014-12-12 | 2015-04-29 | 浙江晨光电缆股份有限公司 | Fission isolation capacity-increasing high voltage power cable with high bonding insulation and manufacturing method |
| CN105609204A (en) * | 2016-03-21 | 2016-05-25 | 中天科技海缆有限公司 | +/-320 kV ultra-high voltage cross-linked polyethylene insulated flexible direct-current power cable |
| CN105825950A (en) * | 2016-04-29 | 2016-08-03 | 芜湖诚通自动化设备有限公司 | Superhigh voltage crosslinked polyethylene insulating flexible power cable and preparation method |
| CN107680734A (en) * | 2017-09-30 | 2018-02-09 | 上海华普电缆有限公司 | Middle pressure 26/35kV and following PP power cables preparation technology |
| CN117095864A (en) * | 2023-01-16 | 2023-11-21 | 特变电工山东鲁能泰山电缆有限公司 | 66 kV-500 kV high-voltage modified polypropylene insulated cable and manufacturing method thereof |
Citations (4)
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|---|---|---|---|---|
| CN2598105Y (en) * | 2003-02-13 | 2004-01-07 | 河北宝丰线缆有限公司 | 127/220 KV power cable with cross-linking polytene insulation welded corrugated Al sheath and polyvinyl-chloride cover |
| CN201378468Y (en) * | 2008-12-25 | 2010-01-06 | 哈尔滨理工大学 | High-voltage and ultra high-voltage cross linked polyethylene insulation electric power cable with nonlinear shielding layer |
| CN102074300A (en) * | 2011-03-07 | 2011-05-25 | 无锡市长城电线电缆有限公司 | 500kV extra-high voltage (EHV) power cable |
| CN202142339U (en) * | 2011-04-27 | 2012-02-08 | 江苏亨通高压电缆有限公司 | HV/EHV DC polyolefin insulation submarine power cable |
-
2012
- 2012-03-28 CN CN201210085906.9A patent/CN102610319B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2598105Y (en) * | 2003-02-13 | 2004-01-07 | 河北宝丰线缆有限公司 | 127/220 KV power cable with cross-linking polytene insulation welded corrugated Al sheath and polyvinyl-chloride cover |
| CN201378468Y (en) * | 2008-12-25 | 2010-01-06 | 哈尔滨理工大学 | High-voltage and ultra high-voltage cross linked polyethylene insulation electric power cable with nonlinear shielding layer |
| CN102074300A (en) * | 2011-03-07 | 2011-05-25 | 无锡市长城电线电缆有限公司 | 500kV extra-high voltage (EHV) power cable |
| CN202142339U (en) * | 2011-04-27 | 2012-02-08 | 江苏亨通高压电缆有限公司 | HV/EHV DC polyolefin insulation submarine power cable |
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| CN102610319A (en) | 2012-07-25 |
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Inventor after: Wu Jianning Inventor after: Qi Jingzan Inventor after: Zeng Xuezhong Inventor after: Ji Ximing Inventor after: Wu Hong Inventor before: Wu Jianning Inventor before: Zheng Yunyan Inventor before: Zheng Shunshan Inventor before: Zeng Xuezhong Inventor before: Qi Jingzan Inventor before: Ji Ximing Inventor before: Wu Hong |
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Effective date of registration: 20161008 Address after: 443000 Hubei city of Yichang Province in Xiaoting District Democratic Road No. 1 Patentee after: Yichang communication cable Co. Ltd. Address before: 443000 Hubei city of Yichang Province in Xiaoting District Democratic Road No. 1 Patentee before: Yichang Lianbang Cable Co., Ltd. Patentee before: Zheng Baozhen Patentee before: Zheng Yunyan |