Flexible high-voltage direct-current cross-linked polyethylene insulation power cable

A cross-linked polyethylene, high-voltage direct current technology, applied in the direction of insulated cables, insulated conductors, cables, etc., can solve problems such as breakdown, insulation aging, uneven pressure distribution insulators, etc., and achieve the advantages of easy construction and laying, and reduced short-circuit current capacity Effect

Inactive Publication Date: 2014-05-14
WUXI GREAT WALL ELECTRIC WIRE & CABLE
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to provide a flexible high-voltage DC XLPE insulated power cable with small size, high strength, light weight, large transmission capacity, superior insulation level and easy laying, which solves the problem of traditional cables due to space charge accumulation in the insulator Insulation aging or even breakdown caused by local electric field distortion, and uneven pressure distribution caused by temperature sensitivity lead to the problem of external overstress of the insulator

Method used

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  • Flexible high-voltage direct-current cross-linked polyethylene insulation power cable

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Embodiment Construction

[0012] Such as figure 1 As shown, a flexible high-voltage DC cross-linked polyethylene insulated power cable according to the present invention includes a copper conductor 1 located in the center of the cable, and the copper conductor 1 is coated with an inner semi-conductive shielding layer 2 and a cross-linked polyethylene insulation layer in turn. Layer 3, outer semiconductive shielding layer 4, metal shielding layer 5, longitudinal water blocking layer 6, radial water blocking layer 7 and polyethylene sheath layer 8.

[0013] The thickness of the inner semi-conductive shielding layer 2 and the outer semi-conductive shielding layer 4 mentioned in the appeal is 1.2mm; the metal shielding layer 5 adopts an oxygen-free copper tape wrapping structure, and the thickness of the oxygen-free copper tape used is 2.5mm. The average covering rate of the package is not less than 30%.

[0014] The longitudinal water-blocking layer 6 adopts single-sided insulating water-blocking tape, a...

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Abstract

The invention discloses a flexible high-voltage direct-current cross-linked polyethylene insulation power cable which comprises a copper conductor located in the center of the power cable. The copper conductor is sequentially wrapped by an inner semi-conductive shielding layer, a cross-linked polyethylene insulation layer, an outer semi-conductive shielding layer, a metal shielding layer, a longitudinal waterproof layer, a radial waterproof layer and a polyethylene jacket layer. The flexible high-voltage direct-current cross-linked polyethylene insulation power cable is an extruding type monopolar cable and has the advantages of being small in size, high in intensity, light in weight, high in transmission capacity, superior in insulation level, easy to lay and the like, and the problems of insulation aging even the breakdown, caused by partial electric field distortion due to space charge accumulation in an insulation body, of a traditional cable and overstressing, caused by uneven pressure distribution due to temperature sensitivity, outside the insulation body of the traditional cable are solved.

Description

technical field [0001] The invention belongs to the field of power cables, in particular to a flexible high-voltage direct-current cross-linked polyethylene insulated power cable. Background technique [0002] At present, the high-voltage DC cables put into operation are mainly oil-paper insulated and oil-filled cables. With the development of polymer insulation materials, plastic polymer insulated cables (mainly cross-linked polyethylene XLPE) have been widely used in AC power transmission and distribution networks, thanks to their high dielectric strength, superior thermomechanical properties, and environmental protection. Advantages in terms of friendliness and ease of maintenance. However, plastic insulated cables have not been widely used on DC high voltage. This is because DC plastic insulated cables sometimes need to change the polarity of the cable in order to change the direction of energy transmission during operation, and the cable is under load. , Changing the ...

Claims

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Application Information

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IPC IPC(8): H01B7/17H01B7/282H01B7/02
CPCY02A30/14
Inventor 张蕴皋王春张如其范呈祥刘磊
Owner WUXI GREAT WALL ELECTRIC WIRE & CABLE
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