CN202373374U - High-voltage corrugated aluminum sheath direct current cable - Google Patents
High-voltage corrugated aluminum sheath direct current cable Download PDFInfo
- Publication number
- CN202373374U CN202373374U CN2011205278458U CN201120527845U CN202373374U CN 202373374 U CN202373374 U CN 202373374U CN 2011205278458 U CN2011205278458 U CN 2011205278458U CN 201120527845 U CN201120527845 U CN 201120527845U CN 202373374 U CN202373374 U CN 202373374U
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- Prior art keywords
- direct current
- cable
- corrugated aluminum
- aluminum sheath
- current cable
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- Expired - Fee Related
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Abstract
The utility model relates to a cable, in particular to a high-voltage corrugated aluminum sheath direct current cable, which comprises a conductor and an outer sheath and is characterized in that the conductor is provided with an insulated layer. The insulated layer comprises an inner screen, an outer screen and crosslinked polyethylene insulated materials. A corrugated aluminum sheath is arranged in the outer sheath. The high-voltage corrugated aluminum sheath direct current cable has the advantages of being capable of removing space charge in insulation, convenient in cable laying, free of fall limit, high in operation reliability and the like.
Description
Technical field
The utility model relates to a kind of cable, especially relates to a kind of high pressure corrugated aluminium sheath direct current cables.
Background technology
As everyone knows, direct current transportation technology is to adopt to carry out direct current transportation based on voltage source converter that can cut-off the type device and PWM technology.This technology is fit to fields such as regenerative resource is incorporated into the power networks, distributed power generation is incorporated into the power networks, isolated island send electricity, urban distribution network is supplied power, asynchronous AC network is interconnected very much.30kV ~ 500kV high voltage direct current cable traditional structure is to adopt oil-impregnated paper insulation structure or oil-filled paper insulation structure, and adopts plumbous cover as watertight composition.In the insulating material (the particularly Insulation Material of this type of XLPE) of high electrical performance; There are miniature defectives such as pore, impurity; These miniature defectives can become captured current " trap "; When applying DC electric field for a long time, charge carrier has formed space charge after in the directional migration process, being captured by trap, causes concentrating and distortion of internal field then.It is superimposed that this moment, internal field was equivalent to the intensity of intensity and space charge of extra electric field.When Where topical electric field strength substantially exceeded the cable design field intensity, the insulation meeting is aging very soon to be punctured.Particularly in the polarity inversion process, internal field often sharply increases, and the probability of insulation breakdown increases greatly.Therefore eliminate space charge " trap ", forming space charge in avoiding insulating is the key of successfully developing the HVDC crosslinked cable.
The defective of conventional art and deficiency have 3 points.1, oil-impregnated paper insulation direct current cables inside has a large amount of fluid insulation oil to exist, and running environment is required height, must carry out fire prevention and handling; 2, oil pressure changes with variations in temperature in the running, must monitor in real time; 3, owing to the existence of oil pressure, cable is limited by drop.
Summary of the invention
The utility model mainly is to the above-mentioned technical problem of existing in prior technology, provides a kind of space charge, the cable laying that can effectively eliminate in the insulation to make things convenient for, do not receive the high pressure corrugated aluminium sheath direct current cables that drop limits, operational reliability is high.
The above-mentioned technical problem of the utility model mainly is able to solve through following technical proposals: a kind of high pressure corrugated aluminium sheath direct current cables; Conductor and oversheath have been comprised; It is characterized in that described conductor is arranged with insulating barrier outward; Described insulating barrier has comprised interior screen and outer screen and crosslinked polyetylene insulated, is provided with corrugated aluminium sheath in the described oversheath.The utility model efficiently solves XLPE problems with space charge under the direct current field intensity; Adopt special construction to adapt to special employing XLPE simultaneously as high-voltage DC cable insulating; Replace oil-paper and oil-filled paper insulated cable, the cable operation can be non-maintaining, and cable laying is convenient; Not limited by drop, operational reliability is high.The utility model is eliminated the space charge in the insulation; And the characteristic according to Electric Field Distribution is confirmed the construction of cable.
As preferably, be provided with semi-conductive buffer band or semi-conductive buffer water-blocking band between described corrugated aluminium sheath and the insulating barrier.Operational reliability is high, fail safe is good.
Therefore, the utlity model has space charge, the cable laying that effectively to eliminate in the insulation and make things convenient for, do not receive characteristics such as drop restriction, operational reliability height.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the utility model.
Embodiment
Pass through embodiment below, and combine accompanying drawing, do further bright specifically the technical scheme of the utility model.
Embodiment 1:
Shown in Figure of description 1, a kind of high pressure corrugated aluminium sheath direct current cables has comprised conductor 1 and oversheath 2, and conductor is arranged with insulating barrier 3 outward, and insulating barrier has comprised interior screen and outer screen and crosslinked polyetylene insulated, is provided with corrugated aluminium sheath 4 in the oversheath.Be provided with semi-conductive buffer water-blocking band 5 between corrugated aluminium sheath 4 and the insulating barrier 3.
The utility model efficiently solves XLPE problems with space charge under the direct current field intensity; Adopt special construction to adapt to special employing XLPE simultaneously as high-voltage DC cable insulating; Replace oil-paper and oil-filled paper insulated cable, the cable operation can be non-maintaining, and cable laying is convenient; Not limited by drop, operational reliability is high.The utility model is eliminated the space charge in the insulation; And the characteristic according to Electric Field Distribution is confirmed the construction of cable.
Should be understood that this embodiment only to be used to the utility model is described and be not used in the restriction the utility model scope.Should be understood that in addition those skilled in the art can do various changes or modification to the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Claims (2)
1. high pressure corrugated aluminium sheath direct current cables; Conductor (1) and oversheath (2) have been comprised; It is characterized in that described conductor is arranged with insulating barrier (3) outward, described insulating barrier has comprised interior screen and outer screen and crosslinked polyetylene insulated, is provided with corrugated aluminium sheath (4) in the described oversheath.
2. high pressure corrugated aluminium sheath direct current cables according to claim 1 is characterized in that being provided with between described corrugated aluminium sheath (4) and the insulating barrier (3) semi-conductive buffer band or semi-conductive buffer water-blocking band (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205278458U CN202373374U (en) | 2011-12-16 | 2011-12-16 | High-voltage corrugated aluminum sheath direct current cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205278458U CN202373374U (en) | 2011-12-16 | 2011-12-16 | High-voltage corrugated aluminum sheath direct current cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202373374U true CN202373374U (en) | 2012-08-08 |
Family
ID=46597068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205278458U Expired - Fee Related CN202373374U (en) | 2011-12-16 | 2011-12-16 | High-voltage corrugated aluminum sheath direct current cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202373374U (en) |
-
2011
- 2011-12-16 CN CN2011205278458U patent/CN202373374U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG WANMA CO., LTD. Free format text: FORMER NAME: ZHEJIANG WANMA CABLE CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 311305 Ling'an Economic Development Zone, Zhejiang Province, South Ring Road, No. 88, No. Patentee after: ZHEJIANG WANMA CO., LTD. Address before: 311305 Ling'an Economic Development Zone, Zhejiang Province, South Ring Road, No. 88, No. Patentee before: Zhejiang Wanma Cable Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20161216 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |