Aerial cable

A kind of overhead cable, aluminum stranded wire technology

Inactive Publication Date: 2011-05-18
NINGBO WANBO INNOVATIVE MATERIAL & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The harmonics in the power grid system, the harmonics generated by the power transmission and distribution system, and the harmonics generated by the electrical equipment cause the AC resistance of the cable conductor to increase, so that the allowable current of the cable decreases, and at the same time, the weak current system equipment , low-voltage switchgear, communication equipment, etc. are very harmful, and harmonics increase the copper loss of the transformer, including resistance loss, eddy current loss in the conductor, and stray loss caused by leakage flux outside the conductor. wasting the capacity of the grid

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: An overhead cable, including a reinforcing core 1 and an aluminum stranded wire layer 2, the aluminum stranded wire layer 2 is divided into an outer aluminum stranded wire layer 21 and an inner aluminum stranded wire layer 22, an outer aluminum stranded wire layer 21 and an inner aluminum stranded wire layer 22 The twisted wire layer 22 is formed by twisting a plurality of aluminum wires 3 respectively, and a single aluminum wire 3 is coated with an insulating layer 4 . The insulating layer 4 is an insulating paint layer or a nylon layer. A copper layer 5 is provided between the insulating layer 4 and the aluminum wire 3 . A waterproof layer 6 is arranged outside the insulating layer 4 . The waterproof layer 6 is a fluorine-containing resin layer, and the thickness of the fluorine-containing resin layer is 0.02 mm. The inner aluminum strand layer 22 is a plurality of aluminum wires 3 that are twisted clockwise around the reinforcement core 1 (right-hande...

Embodiment 2

[0030] Embodiment 2: An overhead cable, including a reinforcing core 1 and an aluminum stranded wire layer 2, the aluminum stranded wire layer 2 is divided into an outer aluminum stranded wire layer 21 and an inner aluminum stranded wire layer 22, an outer aluminum stranded wire layer 21 and an inner aluminum stranded wire layer 22 The twisted wire layer 22 is formed by twisting a plurality of aluminum wires 3 respectively, and a single aluminum wire 3 is coated with an insulating layer 4 . The insulating layer 4 is an insulating paint layer or a nylon layer. A copper layer 5 is provided between the insulating layer 4 and the aluminum wire 3 . A waterproof layer 6 is arranged outside the insulating layer 4 . The waterproof layer 6 is a fluorine-containing organic coating layer, and the thickness of the fluorine-containing organic coating layer is 0.08mm. The inner aluminum strand layer 22 is a plurality of aluminum wires 3 that are twisted clockwise around the reinforcement ...

Embodiment 3

[0031] Embodiment 3: An overhead cable, including a reinforcing core 1 and an aluminum stranded wire layer 2, the aluminum stranded wire layer 2 is divided into an outer aluminum stranded wire layer 21 and an inner aluminum stranded wire layer 22, an outer aluminum stranded wire layer 21 and an inner aluminum stranded wire layer 22 The twisted wire layer 22 is formed by twisting a plurality of aluminum wires 3 respectively, and a single aluminum wire 3 is coated with an insulating layer 4 . The insulating layer 4 is an insulating paint layer or a nylon layer. A copper layer 5 is provided between the insulating layer 4 and the aluminum wire 3 . A waterproof layer 6 is arranged outside the insulating layer 4 . The waterproof layer 6 is a polytetrafluoroethylene layer or the first fluorine-containing plastic layer, and the thickness of the polytetrafluoroethylene layer or the first fluorine-containing plastic layer is 0.6 mm. The inner aluminum strand layer 22 is a plurality of...

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Abstract

The invention discloses an aerial cable which comprises a reinforced core and an aluminum stranded wire layer, wherein, the aluminum stranded wire layer is divided into an outer aluminum stranded wire layer and an inner aluminum stranded wire layer which are respectively formed by the twisting of a plurality of aluminum wires; each single aluminum wire is coated by an insulation layer; the aerialcable has the advantages that each single aluminum wire is coated or covered by the insulation layer; therefore, currents do not influence each other due to magnetic fields produced by adjacent wiresduring the transmission process of an alternating current (adjacency effect refers to the phenomenon that wires get close to each other, and the current density in each wire is not even any more) so as to eliminate AC resistance caused by the said 'crowded current' and cause the current transmission to be distributed on each wire, thereby greatly increasing the effective area of a cable conductorand reducing the impedance of the conductor and electric power consumption.

Description

technical field [0001] The invention relates to a cable, in particular to an overhead cable. Background technique [0002] The overhead cable is used to transmit alternating current. The overhead cable includes a strengthening core and an aluminum strand layer, and the strengthening core is arranged at the center of the aluminum strand layer. Usually the aluminum stranded wire layer is divided into an outer aluminum stranded wire layer and an inner aluminum stranded wire layer. A bare aluminum wire is twisted clockwise around the reinforcing core. When the alternating current passes through the aluminum strand layer of the overhead cable, the current distribution on the cross section of the aluminum strand layer is uneven due to induction, and the closer the surface of the aluminum strand layer is, the greater the current density is. This phenomenon is called "skin effect". The skin effect increases the effective resistance of overhead cables and consumes power in transmis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B7/02H01B7/282H01B7/18
CPCY02A30/14
Inventor 郑凯平
Owner NINGBO WANBO INNOVATIVE MATERIAL & TECH
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