CN205069212U - Flexible DC cable of 320kV - Google Patents

Abstract

The utility model discloses a flexible DC cable of 320kV, include by interior and outer conductor, internal shield layer, insulating layer and external shielding layer. The conductor is that the copper conductor is cut apart to five of 1 core and the sectional area is 1800mm2, still set up the conductor band of thickness for 0.5mm outside the conductor and between the internal shield layer to the conductor band is closely laminated with the conductor, still around a package semi -conductive water -blocking tapes, semi -conductive water -blocking tapes is crowded metal encapsulated sheath outward for the external shielding layer, the metallic sheath pitch layer that coats outward, crowded package PE sheath outside the pitch layer, the PE sheath graphite layer that coats outward. The utility model discloses a flexible DC cable of 320kV have small, intensity is high, light in weight, transmission capacity big, environmental protection and the advantage such as easily lay.

Description

A kind of 320kV flexible direct current cable

Technical field

The utility model relates to a kind of 320kV flexible direct current cable.

Background technology

The development of Present Domestic HVDC Transmission Technology is very fast.Due to the day by day exhaustion of the primary energy such as coal, the generating of the secondary new forms of energy such as national research and development wind energy energetically, solar energy, tidal energy and technology of transmission of electricity.Cable also will develop rapidly as the key equipment of electric energy transmitting, and superhigh pressure flexible direct current cable has compared with ac cable that volume is little, intensity is high, lightweight, transmission capacity large, environmental protection and the advantage such as easily to lay, so superhigh pressure flexible direct current cable also becomes the optimal selection of transmission of electricity.The domestic manufacturing technology for superhigh pressure flexible direct current cable is not also grasped completely, the main dependence on import of flexible direct current cable.External superhigh pressure flexible direct current cables manufacturing manufacturer is Japan and American-European enterprise mainly.Because import will be subject to the restriction at price and delivery date, so directly have influence on the development of Chinese technology of transmission of electricity.China region is wide, the new forms of energy such as wind energy, solar energy, tidal energy enrich, and superhigh pressure flexible direct current cable is the best transmission mode of this kind of energy especially wind energy output electric energy, tool is of great significance by the key technology thus developing superhigh pressure flexible direct current cable as early as possible.

Utility model content

The purpose of this utility model is to overcome the defect of prior art and provides a kind of 320kV flexible direct current cable, and it has, and volume is little, intensity is high, lightweight, transmission capacity large, environmental protection and the advantage such as easily to lay.

The purpose of this utility model is achieved in that a kind of 320kV flexible direct current cable, comprises conductor from inside to outside, internal shield, insulating barrier and outer shielding layer; Wherein,

Described conductor is five segmentation copper conductors of 1 core and sectional area is 1800mm ²;

Go back the conductor band that thickness setting is 0.5mm outside described conductor and between internal shield, and conductor band and conductor fit tightly;

Described outer shielding layer also wrapped semiconductor waterstop outward, extrude metallic sheath outside semiconductor waterstop, metallic sheath applies bitumen layer outward; Extrude PE sheath outside bitumen layer, PE sheath applies graphite linings outward;

The thickness of described internal shield is 1.8mm; The thickness of insulating barrier is 26mm, the thickness of outer shielding layer is 1mm;

The thickness that the thickness of described semiconductor waterstop is 1.1mm, the thickness of metallic sheath is 3.9mm, the thickness of bitumen layer is 0.25mm, PE sheath is 4.9mm.

Above-mentioned 320kV flexible direct current cable, wherein, the material of described metallic sheath is alloy lead.

Above-mentioned 320kV flexible direct current cable, wherein, described insulating barrier adopts special high direct voltage Insulation Material to make.

320kV flexible direct current cable of the present utility model, have that volume is little, intensity is high, lightweight, environmental protection and the advantage such as easily to lay, high voltage, long-distance and large-capacity power transmission can be realized, and with close electric pressure with compared with prismatic ac cable, its transmission capacity is more than one times of ac cable, compared with ac cable, its cost declines more than 1/3rd, and in transmission of electricity process, its line loss is little, reaches energy-saving effect.

Accompanying drawing explanation

Fig. 1 is the sectional view of 320kV flexible direct current cable of the present utility model.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Refer to Fig. 1, a kind of 320kV flexible direct current cable of the present utility model, comprises conductor 1 from inside to outside, internal shield 3, insulating barrier 4 and outer shielding layer 5; Wherein:

Conductor 1 is five segmentation copper conductors of 1 core and sectional area is 1800mm ²;

Go back the conductor band 2 that thickness setting is 0.5mm outside conductor 1 and between internal shield, and conductor band 2 and conductor 1 fit tightly

The outer also wrapped semiconductor waterstop 6 of outer shielding layer 5, extrudes metallic sheath 7 outside semiconductor waterstop 6, metallic sheath 7 outer coating bitumen layer 8; PE sheath 9, PE sheath 9 outer coating graphite linings 10 is extruded outside bitumen layer 8;

The thickness of internal shield 3 is 1.8mm; The thickness of insulating barrier 4 is 26mm, the thickness of outer shielding layer 5 is 1mm; Insulating barrier 4 adopts special high direct voltage Insulation Material to make;

The thickness of semiconductor waterstop 6 is 1.1mm, the material of metallic sheath 7 is alloy lead and thickness is 3.9mm, the thickness of bitumen layer 8 is 0.25mm, PE sheath 9 and thickness is 4.9mm.

320kV flexible direct current cable of the present utility model, the model of the high direct voltage Insulation Material that PE sheath wherein adopts is LE4253DC, solves the impact of space charge on cable insulation structure.

320kV flexible direct current cable of the present utility model, have that volume is little, intensity is high, lightweight, environmental protection and the advantage such as easily to lay, weight only has 42.3kg/m, can realize high voltage, long-distance and large-capacity power transmission, and with close electric pressure with compared with prismatic ac cable, its transmission capacity is more than one times of ac cable, compared with ac cable, its cost declines more than 1/3rd, and in transmission of electricity process, its line loss is little, reaches energy-saving effect.

Above embodiment is only for illustration of the utility model, but not to restriction of the present utility model, person skilled in the relevant technique, when not departing from spirit and scope of the present utility model, various conversion or modification can also be made, therefore all equivalent technical schemes also should belong to category of the present utility model, should be limited by each claim.

Claims (3)

1. a 320kV flexible direct current cable, comprises conductor from inside to outside, internal shield, insulating barrier and outer shielding layer; It is characterized in that,

Described conductor is five segmentation copper conductors of 1 core and sectional area is 1800mm ²;

Go back the conductor band that thickness setting is 0.5mm outside described conductor and between internal shield, and conductor band and conductor fit tightly;

Described outer shielding layer also wrapped semiconductor waterstop outward, extrude metallic sheath outside semiconductor waterstop, metallic sheath applies bitumen layer outward; Extrude PE sheath outside bitumen layer, PE sheath applies graphite linings outward;

The thickness of described internal shield is 1.8mm; The thickness of insulating barrier is 26mm, the thickness of outer shielding layer is 1mm;

The thickness that the thickness of described semiconductor waterstop is 1.1mm, the thickness of metallic sheath is 3.9mm, the thickness of bitumen layer is 0.25mm, PE sheath is 4.9mm.

2. 320kV flexible direct current cable according to claim 1, is characterized in that, the material of described metallic sheath is alloy lead.

3. 320kV flexible direct current cable according to claim 1, is characterized in that, described insulating barrier adopts special high direct voltage Insulation Material to make.