中国电机工程学报2026，Vol.46Issue(5)：1942-1953,中插17,13.DOI:10.13334/j.0258-8013.pcsee.242342
负极高压海底观测网供电系统海缆故障定位方法
Fault Location Method for Submarine Cables in the Negative High-voltage Power Supply System of Undersea Observation Networks
摘要
Abstract
The power supply system is fundamental to the safe and reliable operation of undersea observation networks.Due to the low observability and accessibility of undersea observation networks,combined with the unique power supply structure involving seawater and electrodes in a monopolar power supply loop,submarine cable fault localization becomes particularly complex.This paper focuses on the critical challenge of submarine cable fault localization.To address the deficiencies in existing impedance modeling of power supply loops in undersea observation networks,this paper develops a frequency-variable impedance model for the seawater-electrode-cable loop through π-type equivalent modeling of submarine cables combined with electrochemical analysis of the seawater-electrode interface.By modeling the impedance network of the post-fault seawater-electrode-cable loop,the input impedance is obtained.This method relies solely on electrical data collected from shore stations to derive a complete and accurate frequency-variable input impedance spectrum of the power supply loop.Consequently,a novel method for submarine cable fault localization based on frequency-dependent impedance characteristics is proposed.This method generates a localization function through frequency sweeping,correlating fault distance with impedance,thereby achieving precise fault distance calculation.The research results indicate that this method attains high precision in submarine cable fault localization and exhibits good robustness against varying fault locations and transition resistances,marking a significant advancement in this field.This breakthrough enhances the protective capabilities and fault localization accuracy for the power supply system in undersea observation networks and promotes the application of cathodic DC technology in various marine development and engineering projects.关键词
海水-电极回路/频变阻抗谱/电化学反应/故障定位/海底观测网Key words
seawater-electrode loop/frequency-variable impedance spectrum/electrochemical reaction/fault localization/undersea observation networks分类
信息技术与安全科学引用本文复制引用
张尔佳,余墨多,黄文焘,邰能灵..负极高压海底观测网供电系统海缆故障定位方法[J].中国电机工程学报,2026,46(5):1942-1953,中插17,13.基金项目
国家自然科学基金项目(面上项目)(521707048).Project Supported by National Natural Science Foundation of China(General Program)(521707048). （面上项目）
