Lightning Direct Effect of Optical Fiber Overhead Ground Wires under Continuous Two Lightning Components

被引：1

作者：

Sun J. ^{[1
]}

Yao X. ^{[1
]}

Xu W. ^{[1
]}

Le Y. ^{[1
]}

Chen J. ^{[1
]}

机构：

[1] State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an

来源：

Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | 2018年 / 52卷 / 02期

关键词：

Discharge gap; Lightning direct effect; Optical ground wire; Strand breakage; Temperature distribution; Transfer charge;

D O I：

10.7652/xjtuxb201802013

中图分类号：

学科分类号：

摘要：

By analyzing the current standard of lightning testing and performance for the optical ground wire (OPGW), the lightning direct effect testing system with an adjustable discharge gap for the OPGW is constructed. The lightning strike characteristics and damage performance of OPGW under different experimental conditions of variable DC currents and discharge gaps are evaluated in the experiments. The mechanism of lightning direct effect and conducting performance of OPGW are explored preliminarily. It is found that as the Al-Steel outer layer of the OPGW, the erosion degree of the aluminum-clad steel wire increases with the increasing transfer charge of DC current C component. When the transfer charge gets about 200 C, the temperature of the OPGW surface after the lightning strikes is estimated for more than 3 700 ℃, and more than 30% of the strands are damaged severely. Moreover, when the length of discharge gap increases from 5 cm to 6 cm, the temperature rise of OPGW due to the lightning strike decreases and the lightning damage degree is reduced over 40%. © 2018, Editorial Office of Journal of Xi'an Jiaotong University. All right reserved.

引用

页码：82 / 88

页数：6

共 16 条

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