A lightning-proof double-conductor insulated ground wire with optical fiber on overhead lines

Abstract

The present invention relates to a lightning protection type double-conductor insulated ground wire provided with an optical fiber and used for an overhead line. The invention aims to solve the problem of strand fracture of an optical fiber composite overhead ground wire, achieve energy conservation and loss reduction, decrease potential supply current, melt snow and snow and take power in the open field. According to the technical schemes of the invention, the ground wire comprises an optical fiber unit, a conductive magnetic body inner layer, a composite insulating layer and a conductive magnetic body outer layer which are distributed sequentially from inside to outside; the optical fiber unit is sleeved with a fiber optic bushing; a plurality of galvanized steel wires are stranded so as to form the conductive magnetic body inner layer; the optical fiber unit is clamped at the center of the galvanized steel wires; an insulating inner layer, a main insulating layer and an insulating outer layer are composited to form the composite insulating layer, wherein the insulating inner layer and the insulating outer layer are semiconducting layers; a plurality of galvanized steel wires are stranded so as to form the conductive magnetic body outer layer; and the conductive magnetic body outer layer coats the outer surface of the insulating outer layer. The lightning protection type double-conductor insulated ground wire of the present invention is applicable to a high-voltage overhead alternating current transmission line.

Description

technical field [0001] The invention relates to a ground wire in a high-voltage overhead line in a power system, in particular to a lightning-proof double-conductor insulated ground wire with optical fiber on the overhead line. Suitable for high-voltage overhead AC transmission lines. Background technique [0002] In the prior art, Optical fiber composite overhead groundwires (OPGW) are composite overhead ground wires that integrate optical fiber communication functions and transmission line lightning protection functions, and belong to a special optical cable line dedicated to power systems. With the construction of optical fiber communication network in power system, optical fiber composite overhead ground wire (OPGW) is more and more widely used. The currently used optical fiber composite overhead ground wire structure is as follows: figure 1 , figure 2 As shown, the basic structure is roughly the same. A set of optical fibers forms an optical fiber unit (for communic...

AI Technical Summary

Problems solved by technology

However, the current implementation of the International Electrotechnical Commission IEC and the American Institute of Electrical and Electronics IEEE in the standard design of the fiber optic composite ground wire, the requirements for the outermost layer just stipulate that aluminum-clad steel or aluminum alloy materials should be used, so that when the lightning current comes When the flux link cannot be effectively transmitted, the aluminum layer will be melted instead, resulting in a disconnection accident.

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