CN102610319A - 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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- CN102610319A CN102610319A CN2012100859069A CN201210085906A CN102610319A CN 102610319 A CN102610319 A CN 102610319A CN 2012100859069 A CN2012100859069 A CN 2012100859069A CN 201210085906 A CN201210085906 A CN 201210085906A CN 102610319 A CN102610319 A CN 102610319A
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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 a kind of have better mechanical performance and a Corrosion Protection; Convenient for installation and maintenance; Good environmental protection has enough transient state short-circuit current capacity non-ferrous metal liner shields, is applied to the power cable with cross-linked polyethylene insulation of large-scale power station 750～1100kV ultra high voltage, big capacity transmission line of alternation current.
Background technology
Along with high speed development of national economy, the needs that green energy resource is built, ultra high voltage, big capacity, telecommunicate project of transmitting and converting electricity have been mentioned national perspective long-term plan.Domestic 750-1000kV AC input transformation engineering has begun to start building in bulk to build, and has dropped into commercial operation.
External existing ultra high voltage polypropylene film extrusion coating paper insulate, and oil-filled power cable structural behaviour is unstable, installation and maintenance are inconvenient, environmental-protecting performance is relatively poor; And international, the domestic power cable with cross-linked polyethylene insulation product that also is not applicable to the extra-high voltage grid transmission line.
Summary of the invention
The purpose 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, and is 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, big capacity 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, cable comprises conductor, semiconductive strapping, conductor shield, insulating barrier, insulation screen, semiconductive water-blocking buffer layer, metal screen layer, insulation outer jacket, conduction outer jacket respectively successively from internal layer to skin.
In order to weaken the kelvin effect of conductor when carrying high current load, said conductor preferentially adopts the copper milliken conductor, can adopt also that aluminium milliken conductor, multiple conducting wires are stranded to press that round copper conductor or multiple conducting wires are stranded to press round aluminium conductor.
Described conductor shield, insulation screen adopt ultra-smooth semiconductive polyolefin shielding material to process.
Described insulating barrier preferentially adopts ultrapurification ultra high voltage cross-linked polyethylene insulating material, also can adopt the ultrapurification insulating material of polyethylene to process.
Described metal screen layer adopts wrinkle copper sleeve circle, copper sleeve, corrugated aluminium sheath pipe or circle aluminum casing to process.
Described insulation outer jacket adopts polyethylene insulation protective cover material or polyvinyl chloride insulation protective cover material to process.
Described conduction outer jacket adopts conduction polyolefin material or semiconductive polyolefin material to process.
750～1100kV ultra high voltage power cable with cross-linked polyethylene insulation provided by the invention; Have mechanical performance and Corrosion Protection preferably; Loss is little, and is convenient for installation and maintenance, good environmental protection; Metallic shield is with enough transient state short-circuit current capacity, is applicable to national grid large-scale power station ultra high voltage, big capacity transmission line of alternation current.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1 is a 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, conduction outer jacket 9 respectively successively from internal layer to skin.
In order to satisfy the needs of ultra high voltage, big capacity ac transmission; Weaken the kelvin effect of conductor when carrying high current load; The said conductor 1 preferential copper milliken conductor that adopts is a pattern commonly used with five milliken conductors, seven milliken conductors or nine milliken conductors that are added with the center circle lead.Also can adopt the aluminium milliken conductor, or adopt stranded round copper conductor or the aluminium conductor of pressing of multiple conducting wires.
In order to strengthen the steadiness of conductor structure, conductor 1 is outside equipped with wrapped semiconductive strapping 2, and semiconductive strapping 2 is united the conductor screen that constitutes cable with conductor shield 3.
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 process.
Conductor shield 3, insulating barrier 4, insulation screen 5 adopt the three-layer co-extruded cross-linking cable production line once to extrude and make completion.
Because 750～1100kV ultra high voltage power cable with cross-linked polyethylene insulation has higher requirement to the loss and the capacity of short circuit of metal screen layer; The said metal screen layer 7 preferential less soft copper materials of resistivity that adopt are processed; According to design demand; Select the soft copper band of certain width and number millimeters thick for use, the circumference of the copper pipe sheath of processing as required cuts into certain width with copper strip; Be wrapped on the semiconductive water-blocking buffer layer 6 of cable through the metal tube shaping mould then, constitute the copper sleeve that certain interval is arranged with semiconductive water-blocking buffer layer 6; Adopt the metal tube argon arc welding to meet sb. at the airport again, the vertical bag of the copper sleeve piece of first one-step forming is implemented vertically welding automatically.Metal tube can produce certain heat when vertical bag welding, the semiconductive water-blocking buffer layer of cable insulation core outside at this moment plays and stops the welding action of high temperature, and protection cable insulation core is not scalded.
Also possess certain clearance between the copper sleeve of the vertical bag of completion piece welding and the semiconductive water-blocking buffer layer; Re-use rotation and press make-up machine moulding is pressed in copper sleeve rotation, process the wrinkle copper sleeve; Or adopt drawing to shrink impacted process, process round copper sleeve.Its internal circular surfaces of the copper sleeve of moulding should moderately stick on the semiconductive water-blocking buffer layer 6.Insulation shield layer 5 → constituted complete cable outer layer metallic shield continuity path like this through semiconductive water-blocking buffer layer 6 → metal screen layer 7.
Said metal screen layer 7 also can be made into corrugated aluminium sheath pipe or circle aluminum casing.
The said insulation outer jacket 8 preferential polyethylene insulation protective cover materials that adopt are processed, and for preventing the polyethylene insulation outer jacket cracking of cable, often adopt modification medium density polyethylene insulating sleeve, or adopt the polyvinyl chloride insulation sheath.The metallic sheath surface extrudes the plastics outer jacket after answering the cable pitch or PUR of spraying melting again.
Firmness for the conductive layer on the reinforced insulation outer jacket 8; Make the withstand voltage test convenient and reliable operation of insulation outer jacket 8; Extrude one deck conduction outer jacket 9 on the insulation outer jacket 8 of cable again; Conduction outer jacket 9 adopts the conduction polyolefin material that merges mutually with insulation outer jacket 8 to process, and also can use semiconductive polyolefin material to process.
For the interface between insulation outer jacket 8 of the present invention and the conduction outer jacket 9 is fused well, insulation outer jacket 8 adopts the manufacturing of two layers of plastic co-extrusion technology with conduction outer jacket 9.
Claims (7)
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), conduction outer jacket (9) respectively successively from internal layer to skin.
2. 750～1100kV ultra high voltage power cable with cross-linked polyethylene insulation according to claim 1 is characterized in that: described conductor (1) adopts that copper milliken conductor, aluminium milliken conductor, multiple conducting wires are stranded to press that round copper conductor or multiple conducting wires are stranded to press round aluminium conductor.
3. 750～1100kV ultra high voltage power cable with cross-linked polyethylene insulation according to claim 1 is characterized in that: described conductor shield (3), insulation screen (5) adopt ultra-smooth semiconductive polyolefin shielding material to process.
4. 750～1100kV ultra high voltage power cable with cross-linked polyethylene insulation according to claim 1 is characterized in that: described insulating barrier (4) adopts ultrapurification ultra high voltage cross-linked polyethylene insulating material or ultrapurification insulating material of polyethylene to process.
5. 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, corrugated aluminium sheath pipe or circle aluminum casing to process.
6. 750～1100kV ultra high voltage power cable with cross-linked polyethylene insulation according to claim 1 is characterized in that: described insulation outer jacket (8) adopts polyethylene insulation protective cover material or polyvinyl chloride insulation protective cover material to process.
7. 750～1100kV ultra high voltage power cable with cross-linked polyethylene insulation according to claim 1 is characterized in that: said conduction outer jacket (9) adopts conduction polyolefin material or semiconductive polyolefin material to process.
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 |
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| Publication Number | Publication Date |
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| CN102610319A true CN102610319A (en) | 2012-07-25 |
| CN102610319B 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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Cited By (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 |
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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 |
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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 |
Cited By (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102610319B (en) | 2015-07-08 |
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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 |