CN201153059Y - Thin insulation crosslinked polyethylene insulated power cable having rated voltage of 500kV - Google Patents
Thin insulation crosslinked polyethylene insulated power cable having rated voltage of 500kV Download PDFInfo
- Publication number
- CN201153059Y CN201153059Y CNU2008200736250U CN200820073625U CN201153059Y CN 201153059 Y CN201153059 Y CN 201153059Y CN U2008200736250 U CNU2008200736250 U CN U2008200736250U CN 200820073625 U CN200820073625 U CN 200820073625U CN 201153059 Y CN201153059 Y CN 201153059Y
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- power cable
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Abstract
The utility model relates to a cross-linked polyethylene insulation power cable with the thin insulation rated voltage being 500kV, the cross section structure of the cable comprises a non-metal sheath, a corrugated metal sheath, a semi-conductive water buffering tape, an insulation shielding layer, an insulation layer, a conductor shielding layer, a semi-conductive nylon tape and a conductor from the outside to the inside; the thickness of the insulation layer is 27 mm. The cross-linked polyethylene insulation power cable has the advantages that the cable adopting the structure not only can save raw materials, but also can strictly control the impurity content of the insulation layer of the cable as well as the defect occurrence probability; the material supply channels are strictly controlled to enable the impurity of the insulation materials to be controlled below 50 Mum and so as to make sure that the cable has excellent partial discharge level, power frequency voltage withstanding level as well as power frequency impact voltage withstanding level, and each performance index can meet the requirement of national or international standard. The cable with the structure is suitable to be used for large capacity transmission lines in a large scale power plant, and the like.
Description
Technical field
The utility model relates to a kind of cable, particularly a kind of thin insulating rated voltage 500kV power cable with cross-linked polyethylene insulation.
Background technology
Along with national economy grows continuously and fast and the improving constantly of people's living standard, increasing to the demand of electric power.Electric power energy under-supply become that the restriction Chinese national economy continues, one of the key factor of high speed development.Therefore develop high voltage power transmission, the electric pressure that improves transmission line is an imperative thing.Its insulation thickness of tradition rated voltage 500kV power cable with cross-linked polyethylene insulation is generally and is not less than 32mm, adopt the cable of this thickness not only to increase the external diameter of finished cable, cause the raw-material waste of cable, and along with its insulating barrier of increase of insulation thickness exists the probability of impurity and defective also to increase thereupon.So adopt the cross-linked polyethylene insulating material of ultrapurification, reduce the thickness of cable insulation, become a trend of present rated voltage 500kV power cable with cross-linked polyethylene insulation development.
Summary of the invention
The purpose of this utility model is set about from the raw material of insulating barrier and conductor and insulation screen, is controlled at 27mm to realize rated voltage 500kV power cable with cross-linked polyethylene insulation thickness of insulating layer, reaches and saves consumption reduction, improves the technical performance of cable.
For achieving the above object, the technical solution adopted in the utility model provides a kind of thin insulating rated voltage 500kV power cable with cross-linked polyethylene insulation, and wherein: the cross section structure of this cable includes non metallic sheath, wrinkle metallic sheath, semiconductive block water buffer strip, insulation screen, insulating barrier, conductor shield, semiconductive nylon tape, conductor from outside to inside; Its thickness of described insulating barrier is 27mm.
The cross sectional shape of described conductor is for pressing circle, five milliken conductors or seven milliken conductors.
Wrinkle copper sheathing or stainless steel sleeve that described wrinkle metallic sheath radially wraps up for the buffer strip that blocks water with respect to semiconductive.
Described non metallic sheath is made for polyvinyl chloride, medium density polyethylene or the high density polyethylene (HDPE) of insulation level.
Effect of the present utility model is to adopt the cable of this structure not only can save material, but also the probability that impurity content that can strict control cable insulating barrier and defective occur, supply channel to material carries out strictness control, the Control of Impurities that makes insulating material is below 50 μ m, make cable have good local discharging level, industrial frequency withstand voltage and power frequency impulse withstand voltage level, every performance index of cable all satisfy or are better than the requirement of country and international standard.The cable of this structure is applicable to large capacity transmission circuit uses such as power large-scale electric generating station.
Description of drawings
Fig. 1 is a thin insulating rated voltage 500kV power cable with cross-linked polyethylene insulation embodiment cross section structure schematic diagram of the present utility model;
Among the figure:
1, conductor 2, semiconductive nylon tape 3, conductor screen
4, insulating barrier 5, insulation shielding 6, the semiconductive buffer strip that blocks water
7, wrinkle metallic sheath 8, non metallic sheath
Embodiment
Reaching embodiment in conjunction with the accompanying drawings is illustrated the structure of thin insulating rated voltage 500kV power cable with cross-linked polyethylene insulation of the present utility model.
As shown in Figure 1, thin insulating rated voltage 500kV power cable with cross-linked polyethylene insulation of the present utility model, the cross section structure of this cable include non metallic sheath 8, wrinkle metallic sheath 7, semiconductive block water buffer strip 6, insulation screen 5, insulating barrier 4, conductor shield 3, semiconductive nylon tape 2, conductor 1 from outside to inside; Described insulating barrier 4 its thickness are 27mm.The cross sectional shape of described conductor 1 is for pressing circle, five milliken conductors or seven milliken conductors.Wrinkle copper sheathing or stainless steel sleeve that described wrinkle metallic sheath 7 radially wraps up for the buffer strip 6 that blocks water with respect to semiconductive.Described non metallic sheath 8 is made for polyvinyl chloride, medium density polyethylene or the high density polyethylene (HDPE) of insulation level.There is conductive coating on the surface that scribbles pitch corrosion-inhibiting coating and non metallic sheath 8 on wrinkle metallic sheath 7 surfaces.
Thin insulating rated voltage 500kV power cable with cross-linked polyethylene insulation structure of the present utility model is achieved in that
Embodiment 1
As shown in Figure 1, the crosslinked polyetylene insulated corrugated aluminium sheath pe sheath of rated voltage 500kV power cable, model is YJLW03-290/500 1 * 1600mm
2, its cross section structure is from inside to outside as follows successively:
Cross sectional shape is to press wrinkle metallic sheath 7, the pe sheath 8 that circular five milliken conductors 1, semiconductive nylon tape 2, conductor shield 3, insulating barrier 4, insulation screen 5, semiconductive block water buffer strip 6, do with copper, and the conductive coating on the pitch corrosion-inhibiting coating on wrinkle metallic sheath surface and non metallic sheath surface.
Embodiment 2
As shown in Figure 1, the crosslinked polyetylene insulated wrinkle stainless steel sleeve of rated voltage 500kV pvc sheath power cable, model is YJLW02-290/500 1 * 3000mm
2, its cross section structure is from inside to outside as follows successively:
Cross sectional shape is to press wrinkle metallic sheath 7, the pvc sheath 8 that circular seven milliken conductors 1, semiconductive nylon tape 2, conductor shield 3, insulating barrier 4, insulation screen 5, semiconductive block water buffer strip 6, do with aluminum, and the conductive coating on the pitch corrosion-inhibiting coating on wrinkle metallic sheath surface and non metallic sheath surface.
Claims (4)
1, a kind of thin insulating rated voltage 500kV power cable with cross-linked polyethylene insulation is characterized in that: the cross section structure of this cable includes non metallic sheath (8), wrinkle metallic sheath (7), semiconductive block water buffer strip (6), insulation screen (5), insulating barrier (4), conductor shield (3), semiconductive nylon tape (2), conductor (1) from outside to inside; Its thickness of described insulating barrier (4) is 27mm.
2, according to the described thin insulating rated voltage of claim 1 500kV power cable with cross-linked polyethylene insulation, it is characterized in that: the cross sectional shape of described conductor (1) is for pressing circle, five milliken conductors or seven milliken conductors.
3, according to the described thin insulating rated voltage of claim 1 500kV power cable with cross-linked polyethylene insulation, it is characterized in that: wrinkle copper sheathing or stainless steel sleeve that described wrinkle metallic sheath (7) radially wraps up for the buffer strip (6) that blocks water with respect to semiconductive.
4, according to the described thin insulating rated voltage of claim 1 500kV power cable with cross-linked polyethylene insulation, it is characterized in that: described non metallic sheath (8) is made for polyvinyl chloride, medium density polyethylene or the high density polyethylene (HDPE) of insulation level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200736250U CN201153059Y (en) | 2008-01-08 | 2008-01-08 | Thin insulation crosslinked polyethylene insulated power cable having rated voltage of 500kV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200736250U CN201153059Y (en) | 2008-01-08 | 2008-01-08 | Thin insulation crosslinked polyethylene insulated power cable having rated voltage of 500kV |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201153059Y true CN201153059Y (en) | 2008-11-19 |
Family
ID=40128734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200736250U Expired - Fee Related CN201153059Y (en) | 2008-01-08 | 2008-01-08 | Thin insulation crosslinked polyethylene insulated power cable having rated voltage of 500kV |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201153059Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308831A (en) * | 2013-05-31 | 2013-09-18 | 国家电网公司 | Crosslinked polyethylene cable water-resistant tree performance rapid detection method based on power-frequency voltage withstanding method |
| CN104979040A (en) * | 2015-06-25 | 2015-10-14 | 芜湖扬宇机电技术开发有限公司 | Flexible power transmission undersea cable |
-
2008
- 2008-01-08 CN CNU2008200736250U patent/CN201153059Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308831A (en) * | 2013-05-31 | 2013-09-18 | 国家电网公司 | Crosslinked polyethylene cable water-resistant tree performance rapid detection method based on power-frequency voltage withstanding method |
| CN104979040A (en) * | 2015-06-25 | 2015-10-14 | 芜湖扬宇机电技术开发有限公司 | Flexible power transmission undersea cable |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081119 Termination date: 20130108 |