摘要：Alternating current (AC) is induced in armor because of electromagnetic induction. The induced AC flowing through the electrolyte–metal interface corrodes the armor, which accelerates submarine cable failure. Numerical simulation is performed to calculate the induced current density along a 500 kV submarine cable in the East China Sea, and the effect factors of the current are determined. Simulation experiments are conducted to study the corrosion of copper armor in artificial seawater at various AC current densities. The results reveal that the induced AC current densities can considerably increase the corrosion rates of copper armor. The max induced AC current densities are found to be located at the beginning and the end of the submarine cable. Cross-connection can effectively reduce the induced AC current density of the armor and thus reduce its corrosion rate (From 1.57 to 0.15 mm/a). Cross-connections are required at both ends of a submarine cable to reduce armor corrosion. For cross-connected submarine cables, the cable length, cable spacing, and resistivity of the outer serving have a negligible effect on the corrosion rate. The load current, defect diameter, and environmental resistivity have a considerable effect on the current density.
© 2021 Elsevier B.V.

ISSN号：0378-7796

卷、期、页：v 195,

发表日期：2021-06-01

影响因子：3.211000

期刊分区（SCI为中科院分区）：三区

收录情况：SCIE（科学引文索引网络版）,EI（工程索引）

发表期刊名称：Electric Power Systems Research

参与作者：张玉楠

通讯作者：刘冠一,董廷涛

第一作者：刘冠一,董绍华

论文类型：期刊论文

论文概要：刘冠一,董绍华,张玉楠,刘冠一,董廷涛，Corrosion of copper armor caused by induced current in a 500 kV alternating current submarine cable，Electric Power Systems Research，2021，v 195,

论文题目：Corrosion of copper armor caused by induced current in a 500 kV alternating current submarine cable